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Commit 381a2af8 authored by David S. Miller's avatar David S. Miller
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Merge http://linux-lksctp.bkbits.net/lksctp-2.5 

into nuts.ninka.net:/home/davem/src/BK/net-2.5
parents 850e6bc2 7019ed1f
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Showing with 1592 additions and 1392 deletions
include/net/sctp/constants.h
View file @ 381a2af8
...@@ -138,12 +138,10 @@ typedef enum { ...@@ -138,12 +138,10 @@ typedef enum {
*/ */
typedef union { typedef union {
sctp_cid_t chunk; sctp_cid_t chunk;
sctp_event_timeout_t timeout; sctp_event_timeout_t timeout;
sctp_event_other_t other; sctp_event_other_t other;
sctp_event_primitive_t primitive; sctp_event_primitive_t primitive;
} sctp_subtype_t; } sctp_subtype_t;
#define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \ #define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \
...@@ -421,9 +419,9 @@ typedef enum { ...@@ -421,9 +419,9 @@ typedef enum {
/* Reasons to retransmit. */ /* Reasons to retransmit. */
typedef enum { typedef enum {
SCTP_RETRANSMIT_T3_RTX, SCTP_RTXR_T3_RTX,
SCTP_RETRANSMIT_FAST_RTX, SCTP_RTXR_FAST_RTX,
SCTP_RETRANSMIT_PMTU_DISCOVERY, SCTP_RTXR_PMTUD,
} sctp_retransmit_reason_t; } sctp_retransmit_reason_t;
/* Reasons to lower cwnd. */ /* Reasons to lower cwnd. */
......
include/net/sctp/sctp.h
View file @ 381a2af8
...@@ -130,7 +130,7 @@ extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family); ...@@ -130,7 +130,7 @@ extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
extern int sctp_register_pf(struct sctp_pf *, sa_family_t); extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
/* /*
* sctp_socket.c * sctp/socket.c
*/ */
extern int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb); extern int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
extern int sctp_inet_listen(struct socket *sock, int backlog); extern int sctp_inet_listen(struct socket *sock, int backlog);
...@@ -139,7 +139,7 @@ extern unsigned int sctp_poll(struct file *file, struct socket *sock, ...@@ -139,7 +139,7 @@ extern unsigned int sctp_poll(struct file *file, struct socket *sock,
poll_table *wait); poll_table *wait);
/* /*
* sctp_primitive.c * sctp/primitive.c
*/ */
extern int sctp_primitive_ASSOCIATE(sctp_association_t *, void *arg); extern int sctp_primitive_ASSOCIATE(sctp_association_t *, void *arg);
extern int sctp_primitive_SHUTDOWN(sctp_association_t *, void *arg); extern int sctp_primitive_SHUTDOWN(sctp_association_t *, void *arg);
...@@ -148,14 +148,14 @@ extern int sctp_primitive_SEND(sctp_association_t *, void *arg); ...@@ -148,14 +148,14 @@ extern int sctp_primitive_SEND(sctp_association_t *, void *arg);
extern int sctp_primitive_REQUESTHEARTBEAT(sctp_association_t *, void *arg); extern int sctp_primitive_REQUESTHEARTBEAT(sctp_association_t *, void *arg);
/* /*
* sctp_crc32c.c * sctp/crc32c.c
*/ */
extern __u32 sctp_start_cksum(__u8 *ptr, __u16 count); extern __u32 sctp_start_cksum(__u8 *ptr, __u16 count);
extern __u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 cksum); extern __u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 cksum);
extern __u32 sctp_end_cksum(__u32 cksum); extern __u32 sctp_end_cksum(__u32 cksum);
/* /*
* sctp_input.c * sctp/input.c
*/ */
extern int sctp_rcv(struct sk_buff *skb); extern int sctp_rcv(struct sk_buff *skb);
extern void sctp_v4_err(struct sk_buff *skb, u32 info); extern void sctp_v4_err(struct sk_buff *skb, u32 info);
...@@ -170,9 +170,16 @@ extern void __sctp_unhash_endpoint(sctp_endpoint_t *); ...@@ -170,9 +170,16 @@ extern void __sctp_unhash_endpoint(sctp_endpoint_t *);
extern sctp_association_t *__sctp_lookup_association(const union sctp_addr *, extern sctp_association_t *__sctp_lookup_association(const union sctp_addr *,
const union sctp_addr *, const union sctp_addr *,
struct sctp_transport **); struct sctp_transport **);
extern struct sock *sctp_err_lookup(int family, struct sk_buff *,
struct sctphdr *, struct sctp_endpoint **,
struct sctp_association **,
struct sctp_transport **);
extern void sctp_err_finish(struct sock *, struct sctp_endpoint *,
struct sctp_association *);
extern void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
struct sctp_transport *t, __u32 pmtu);
/* /*
* sctp_hashdriver.c * sctp/hashdriver.c
*/ */
extern void sctp_hash_digest(const char *secret, const int secret_len, extern void sctp_hash_digest(const char *secret, const int secret_len,
const char *text, const int text_len, const char *text, const int text_len,
...@@ -184,9 +191,7 @@ extern void sctp_hash_digest(const char *secret, const int secret_len, ...@@ -184,9 +191,7 @@ extern void sctp_hash_digest(const char *secret, const int secret_len,
#ifdef TEST_FRAME #ifdef TEST_FRAME
#include <test_frame.h> #include <test_frame.h>
#else #else
/* spin lock wrappers. */ /* spin lock wrappers. */
...@@ -312,7 +317,6 @@ static inline void sctp_sysctl_register(void) { return; } ...@@ -312,7 +317,6 @@ static inline void sctp_sysctl_register(void) { return; }
static inline void sctp_sysctl_unregister(void) { return; } static inline void sctp_sysctl_unregister(void) { return; }
#endif #endif
/* Size of Supported Address Parameter for 'x' address types. */ /* Size of Supported Address Parameter for 'x' address types. */
#define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16)) #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
...@@ -320,19 +324,15 @@ static inline void sctp_sysctl_unregister(void) { return; } ...@@ -320,19 +324,15 @@ static inline void sctp_sysctl_unregister(void) { return; }
extern int sctp_v6_init(void); extern int sctp_v6_init(void);
extern void sctp_v6_exit(void); extern void sctp_v6_exit(void);
static inline int sctp_ipv6_addr_type(const struct in6_addr *addr) extern void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
{ int type, int code, int offset, __u32 info);
return ipv6_addr_type((struct in6_addr*) addr);
}
#else /* #ifdef defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ #else /* #ifdef defined(CONFIG_IPV6) */
#define sctp_ipv6_addr_type(a) 0
static inline int sctp_v6_init(void) { return 0; } static inline int sctp_v6_init(void) { return 0; }
static inline void sctp_v6_exit(void) { return; } static inline void sctp_v6_exit(void) { return; }
#endif /* #ifdef defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ #endif /* #if defined(CONFIG_IPV6) */
/* Map an association to an assoc_id. */ /* Map an association to an assoc_id. */
static inline sctp_assoc_t sctp_assoc2id(const sctp_association_t *asoc) static inline sctp_assoc_t sctp_assoc2id(const sctp_association_t *asoc)
...@@ -421,6 +421,15 @@ static inline __s32 sctp_jitter(__u32 rto) ...@@ -421,6 +421,15 @@ static inline __s32 sctp_jitter(__u32 rto)
return ret; return ret;
} }
/* Break down data chunks at this point. */
static inline int sctp_frag_point(int pmtu)
{
pmtu -= SCTP_IP_OVERHEAD + sizeof(struct sctp_data_chunk);
pmtu -= sizeof(struct sctp_sack_chunk);
return pmtu;
}
/* Walk through a list of TLV parameters. Don't trust the /* Walk through a list of TLV parameters. Don't trust the
* individual parameter lengths and instead depend on * individual parameter lengths and instead depend on
* the chunk length to indicate when to stop. Make sure * the chunk length to indicate when to stop. Make sure
...@@ -479,21 +488,24 @@ static inline struct sctp_protocol *sctp_get_protocol(void) ...@@ -479,21 +488,24 @@ static inline struct sctp_protocol *sctp_get_protocol(void)
/* Convert from an IP version number to an Address Family symbol. */ /* Convert from an IP version number to an Address Family symbol. */
static inline int ipver2af(__u8 ipver) static inline int ipver2af(__u8 ipver)
{ {
int family;
switch (ipver) { switch (ipver) {
case 4: case 4:
family = AF_INET; return AF_INET;
break;
case 6: case 6:
family = AF_INET6; return AF_INET6;
break;
default: default:
family = 0; return 0;
break;
}; };
}
/* Perform some sanity checks. */
static inline int sctp_sanity_check(void)
{
SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
sizeof(((struct sk_buff *)0)->cb),
"SCTP: ulpevent does not fit in skb!\n", return 0);
return family; return 1;
} }
/* Warning: The following hash functions assume a power of two 'size'. */ /* Warning: The following hash functions assume a power of two 'size'. */
...@@ -537,7 +549,7 @@ struct sctp_sock { ...@@ -537,7 +549,7 @@ struct sctp_sock {
struct sock sk; struct sock sk;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
struct ipv6_pinfo *pinet6; struct ipv6_pinfo *pinet6;
#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */ #endif /* CONFIG_IPV6 */
struct inet_opt inet; struct inet_opt inet;
struct sctp_opt sctp; struct sctp_opt sctp;
}; };
...@@ -550,7 +562,7 @@ struct sctp6_sock { ...@@ -550,7 +562,7 @@ struct sctp6_sock {
struct sctp_opt sctp; struct sctp_opt sctp;
struct ipv6_pinfo inet6; struct ipv6_pinfo inet6;
}; };
#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */ #endif /* CONFIG_IPV6 */
#define sctp_sk(__sk) (&((struct sctp_sock *)__sk)->sctp) #define sctp_sk(__sk) (&((struct sctp_sock *)__sk)->sctp)
......
include/net/sctp/sm.h
View file @ 381a2af8
...@@ -197,15 +197,14 @@ sctp_state_fn_t sctp_addip_do_asconf; ...@@ -197,15 +197,14 @@ sctp_state_fn_t sctp_addip_do_asconf;
sctp_state_fn_t sctp_addip_do_asconf_ack; sctp_state_fn_t sctp_addip_do_asconf_ack;
/* Prototypes for utility support functions. */ /* Prototypes for utility support functions. */
__u8 sctp_get_chunk_type(sctp_chunk_t *chunk); __u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t event_type, sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t event_type,
sctp_state_t state, sctp_state_t state,
sctp_subtype_t event_subtype); sctp_subtype_t event_subtype);
int sctp_chunk_iif(const struct sctp_chunk *);
time_t timeval_sub(struct timeval *, struct timeval *); struct sctp_association *sctp_make_temp_asoc(const struct sctp_endpoint *,
sctp_association_t *sctp_make_temp_asoc(const sctp_endpoint_t *, struct sctp_chunk *,
sctp_chunk_t *, int gfp);
const int priority);
__u32 sctp_generate_verification_tag(void); __u32 sctp_generate_verification_tag(void);
void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag); void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag);
...@@ -344,7 +343,7 @@ __u32 sctp_generate_tsn(const sctp_endpoint_t *); ...@@ -344,7 +343,7 @@ __u32 sctp_generate_tsn(const sctp_endpoint_t *);
/* 4th level prototypes */ /* 4th level prototypes */
void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *, void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *,
__u16 port); __u16 port, int iif);
int sctp_addr2sockaddr(const union sctp_params, union sctp_addr *); int sctp_addr2sockaddr(const union sctp_params, union sctp_addr *);
int sockaddr2sctp_addr(const union sctp_addr *, sctp_addr_param_t *); int sockaddr2sctp_addr(const union sctp_addr *, sctp_addr_param_t *);
......
include/net/sctp/structs.h
View file @ 381a2af8
...@@ -242,6 +242,7 @@ struct sctp_af { ...@@ -242,6 +242,7 @@ struct sctp_af {
void (*inaddr_any) (union sctp_addr *, unsigned short); void (*inaddr_any) (union sctp_addr *, unsigned short);
int (*is_any) (const union sctp_addr *); int (*is_any) (const union sctp_addr *);
int (*available) (const union sctp_addr *); int (*available) (const union sctp_addr *);
int (*skb_iif) (const struct sk_buff *sk);
__u16 net_header_len; __u16 net_header_len;
int sockaddr_len; int sockaddr_len;
sa_family_t sa_family; sa_family_t sa_family;
...@@ -260,6 +261,7 @@ struct sctp_pf { ...@@ -260,6 +261,7 @@ struct sctp_pf {
const union sctp_addr *, const union sctp_addr *,
struct sctp_opt *); struct sctp_opt *);
int (*bind_verify) (struct sctp_opt *, union sctp_addr *); int (*bind_verify) (struct sctp_opt *, union sctp_addr *);
int (*send_verify) (struct sctp_opt *, union sctp_addr *);
int (*supported_addrs)(const struct sctp_opt *, __u16 *); int (*supported_addrs)(const struct sctp_opt *, __u16 *);
struct sock *(*create_accept_sk) (struct sock *sk, struct sock *(*create_accept_sk) (struct sock *sk,
struct sctp_association *asoc); struct sctp_association *asoc);
...@@ -430,7 +432,7 @@ struct sctp_ssnmap { ...@@ -430,7 +432,7 @@ struct sctp_ssnmap {
}; };
struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *, __u16, __u16); struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *, __u16, __u16);
struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out, int priority); struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out, int gfp);
void sctp_ssnmap_free(struct sctp_ssnmap *map); void sctp_ssnmap_free(struct sctp_ssnmap *map);
void sctp_ssnmap_clear(struct sctp_ssnmap *map); void sctp_ssnmap_clear(struct sctp_ssnmap *map);
...@@ -509,7 +511,7 @@ struct sctp_chunk { ...@@ -509,7 +511,7 @@ struct sctp_chunk {
struct sctp_sndrcvinfo sinfo; struct sctp_sndrcvinfo sinfo;
/* Which association does this belong to? */ /* Which association does this belong to? */
sctp_association_t *asoc; struct sctp_association *asoc;
/* What endpoint received this chunk? */ /* What endpoint received this chunk? */
sctp_endpoint_common_t *rcvr; sctp_endpoint_common_t *rcvr;
...@@ -541,11 +543,11 @@ struct sctp_chunk { ...@@ -541,11 +543,11 @@ struct sctp_chunk {
struct sctp_transport *transport; struct sctp_transport *transport;
}; };
sctp_chunk_t *sctp_make_chunk(const sctp_association_t *, __u8 type, sctp_chunk_t *sctp_make_chunk(const struct sctp_association *, __u8 type,
__u8 flags, int size); __u8 flags, int size);
void sctp_free_chunk(sctp_chunk_t *); void sctp_free_chunk(sctp_chunk_t *);
void *sctp_addto_chunk(sctp_chunk_t *chunk, int len, const void *data); void *sctp_addto_chunk(sctp_chunk_t *chunk, int len, const void *data);
sctp_chunk_t *sctp_chunkify(struct sk_buff *, const sctp_association_t *, sctp_chunk_t *sctp_chunkify(struct sk_buff *, const struct sctp_association *,
struct sock *); struct sock *);
void sctp_init_addrs(sctp_chunk_t *, union sctp_addr *, union sctp_addr *); void sctp_init_addrs(sctp_chunk_t *, union sctp_addr *, union sctp_addr *);
const union sctp_addr *sctp_source(const sctp_chunk_t *chunk); const union sctp_addr *sctp_source(const sctp_chunk_t *chunk);
...@@ -560,7 +562,7 @@ struct sockaddr_storage_list { ...@@ -560,7 +562,7 @@ struct sockaddr_storage_list {
union sctp_addr a; union sctp_addr a;
}; };
typedef sctp_chunk_t *(sctp_packet_phandler_t)(sctp_association_t *); typedef sctp_chunk_t *(sctp_packet_phandler_t)(struct sctp_association *);
/* This structure holds lists of chunks as we are assembling for /* This structure holds lists of chunks as we are assembling for
* transmission. * transmission.
...@@ -590,13 +592,16 @@ struct sctp_packet { ...@@ -590,13 +592,16 @@ struct sctp_packet {
/* This packet should advertise ECN capability to the network /* This packet should advertise ECN capability to the network
* via the ECT bit. * via the ECT bit.
*/ */
int ecn_capable; char ecn_capable;
/* This packet contains a COOKIE-ECHO chunk. */ /* This packet contains a COOKIE-ECHO chunk. */
int has_cookie_echo; char has_cookie_echo;
/* This packet containsa SACK chunk. */
char has_sack;
/* SCTP cannot fragment this packet. So let ip fragment it. */ /* SCTP cannot fragment this packet. So let ip fragment it. */
int ipfragok; char ipfragok;
int malloced; int malloced;
}; };
...@@ -660,7 +665,7 @@ struct sctp_transport { ...@@ -660,7 +665,7 @@ struct sctp_transport {
struct sctp_af *af_specific; struct sctp_af *af_specific;
/* Which association do we belong to? */ /* Which association do we belong to? */
sctp_association_t *asoc; struct sctp_association *asoc;
/* RFC2960 /* RFC2960
* *
...@@ -799,7 +804,8 @@ struct sctp_transport { ...@@ -799,7 +804,8 @@ struct sctp_transport {
struct sctp_transport *sctp_transport_new(const union sctp_addr *, int); struct sctp_transport *sctp_transport_new(const union sctp_addr *, int);
struct sctp_transport *sctp_transport_init(struct sctp_transport *, struct sctp_transport *sctp_transport_init(struct sctp_transport *,
const union sctp_addr *, int); const union sctp_addr *, int);
void sctp_transport_set_owner(struct sctp_transport *, sctp_association_t *); void sctp_transport_set_owner(struct sctp_transport *,
struct sctp_association *);
void sctp_transport_route(struct sctp_transport *, union sctp_addr *, void sctp_transport_route(struct sctp_transport *, union sctp_addr *,
struct sctp_opt *); struct sctp_opt *);
void sctp_transport_pmtu(struct sctp_transport *); void sctp_transport_pmtu(struct sctp_transport *);
...@@ -862,13 +868,16 @@ void sctp_inq_set_th_handler(struct sctp_inq *, void (*)(void *), void *); ...@@ -862,13 +868,16 @@ void sctp_inq_set_th_handler(struct sctp_inq *, void (*)(void *), void *);
* When free()'d, it empties itself out via output_handler(). * When free()'d, it empties itself out via output_handler().
*/ */
struct sctp_outq { struct sctp_outq {
sctp_association_t *asoc; struct sctp_association *asoc;
/* Data pending that has never been transmitted. */ /* Data pending that has never been transmitted. */
struct sk_buff_head out; struct sk_buff_head out;
unsigned out_qlen; /* Total length of queued data chunks. */ unsigned out_qlen; /* Total length of queued data chunks. */
/* Error of send failed, may used in SCTP_SEND_FAILED event. */
unsigned error;
/* These are control chunks we want to send. */ /* These are control chunks we want to send. */
struct sk_buff_head control; struct sk_buff_head control;
...@@ -902,8 +911,8 @@ struct sctp_outq { ...@@ -902,8 +911,8 @@ struct sctp_outq {
int malloced; int malloced;
}; };
struct sctp_outq *sctp_outq_new(sctp_association_t *); struct sctp_outq *sctp_outq_new(struct sctp_association *);
void sctp_outq_init(sctp_association_t *, struct sctp_outq *); void sctp_outq_init(struct sctp_association *, struct sctp_outq *);
void sctp_outq_teardown(struct sctp_outq *); void sctp_outq_teardown(struct sctp_outq *);
void sctp_outq_free(struct sctp_outq*); void sctp_outq_free(struct sctp_outq*);
int sctp_outq_tail(struct sctp_outq *, sctp_chunk_t *chunk); int sctp_outq_tail(struct sctp_outq *, sctp_chunk_t *chunk);
...@@ -947,20 +956,16 @@ sctp_bind_addr_t *sctp_bind_addr_new(int gfp_mask); ...@@ -947,20 +956,16 @@ sctp_bind_addr_t *sctp_bind_addr_new(int gfp_mask);
void sctp_bind_addr_init(sctp_bind_addr_t *, __u16 port); void sctp_bind_addr_init(sctp_bind_addr_t *, __u16 port);
void sctp_bind_addr_free(sctp_bind_addr_t *); void sctp_bind_addr_free(sctp_bind_addr_t *);
int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src, int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src,
sctp_scope_t scope, int priority,int flags); sctp_scope_t scope, int gfp,int flags);
int sctp_add_bind_addr(sctp_bind_addr_t *, union sctp_addr *, int sctp_add_bind_addr(sctp_bind_addr_t *, union sctp_addr *,
int priority); int gfp);
int sctp_del_bind_addr(sctp_bind_addr_t *, union sctp_addr *); int sctp_del_bind_addr(sctp_bind_addr_t *, union sctp_addr *);
int sctp_bind_addr_match(sctp_bind_addr_t *, const union sctp_addr *, int sctp_bind_addr_match(sctp_bind_addr_t *, const union sctp_addr *,
struct sctp_opt *); struct sctp_opt *);
union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp, union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp,
int *addrs_len, int *addrs_len, int gfp);
int priority); int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw, int len,
int sctp_raw_to_bind_addrs(sctp_bind_addr_t *bp, __u16 port, int gfp);
__u8 *raw_addr_list,
int addrs_len,
unsigned short port,
int priority);
sctp_scope_t sctp_scope(const union sctp_addr *); sctp_scope_t sctp_scope(const union sctp_addr *);
int sctp_in_scope(const union sctp_addr *addr, const sctp_scope_t scope); int sctp_in_scope(const union sctp_addr *addr, const sctp_scope_t scope);
...@@ -1063,7 +1068,7 @@ struct sctp_endpoint { ...@@ -1063,7 +1068,7 @@ struct sctp_endpoint {
* pointer, or table pointers dependent on how SCTP * pointer, or table pointers dependent on how SCTP
* is implemented. * is implemented.
*/ */
/* This is really a list of sctp_association_t entries. */ /* This is really a list of struct sctp_association entries. */
struct list_head asocs; struct list_head asocs;
/* Secret Key: A secret key used by this endpoint to compute /* Secret Key: A secret key used by this endpoint to compute
...@@ -1099,12 +1104,12 @@ static inline sctp_endpoint_t *sctp_ep(sctp_endpoint_common_t *base) ...@@ -1099,12 +1104,12 @@ static inline sctp_endpoint_t *sctp_ep(sctp_endpoint_common_t *base)
sctp_endpoint_t *sctp_endpoint_new(struct sctp_protocol *, struct sock *, int); sctp_endpoint_t *sctp_endpoint_new(struct sctp_protocol *, struct sock *, int);
sctp_endpoint_t *sctp_endpoint_init(struct sctp_endpoint *, sctp_endpoint_t *sctp_endpoint_init(struct sctp_endpoint *,
struct sctp_protocol *, struct sctp_protocol *,
struct sock *, int priority); struct sock *, int gfp);
void sctp_endpoint_free(sctp_endpoint_t *); void sctp_endpoint_free(sctp_endpoint_t *);
void sctp_endpoint_put(sctp_endpoint_t *); void sctp_endpoint_put(sctp_endpoint_t *);
void sctp_endpoint_hold(sctp_endpoint_t *); void sctp_endpoint_hold(sctp_endpoint_t *);
void sctp_endpoint_add_asoc(sctp_endpoint_t *, sctp_association_t *asoc); void sctp_endpoint_add_asoc(sctp_endpoint_t *, struct sctp_association *asoc);
sctp_association_t *sctp_endpoint_lookup_assoc(const sctp_endpoint_t *ep, struct sctp_association *sctp_endpoint_lookup_assoc(const sctp_endpoint_t *ep,
const union sctp_addr *paddr, const union sctp_addr *paddr,
struct sctp_transport **); struct sctp_transport **);
int sctp_endpoint_is_peeled_off(sctp_endpoint_t *, const union sctp_addr *); int sctp_endpoint_is_peeled_off(sctp_endpoint_t *, const union sctp_addr *);
...@@ -1113,18 +1118,16 @@ sctp_endpoint_t *sctp_endpoint_is_match(sctp_endpoint_t *, ...@@ -1113,18 +1118,16 @@ sctp_endpoint_t *sctp_endpoint_is_match(sctp_endpoint_t *,
int sctp_has_association(const union sctp_addr *laddr, int sctp_has_association(const union sctp_addr *laddr,
const union sctp_addr *paddr); const union sctp_addr *paddr);
int sctp_verify_init(const sctp_association_t *asoc, int sctp_verify_init(const struct sctp_association *asoc, sctp_cid_t,
sctp_cid_t cid, sctp_init_chunk_t *peer_init, struct sctp_chunk *chunk,
sctp_init_chunk_t *peer_init, struct sctp_chunk **err_chunk);
sctp_chunk_t *chunk, int sctp_process_init(struct sctp_association *, sctp_cid_t cid,
sctp_chunk_t **err_chunk); const union sctp_addr *peer,
int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid, sctp_init_chunk_t *init, int gfp);
const union sctp_addr *peer_addr, int sctp_process_param(struct sctp_association *, union sctp_params param,
sctp_init_chunk_t *peer_init, int priority); const union sctp_addr *from, int gfp);
int sctp_process_param(sctp_association_t *asoc, union sctp_params param, __u32 sctp_generate_tag(const sctp_endpoint_t *);
const union sctp_addr *peer_addr, int priority); __u32 sctp_generate_tsn(const sctp_endpoint_t *);
__u32 sctp_generate_tag(const sctp_endpoint_t *ep);
__u32 sctp_generate_tsn(const sctp_endpoint_t *ep);
/* RFC2960 /* RFC2960
...@@ -1153,7 +1156,7 @@ struct sctp_association { ...@@ -1153,7 +1156,7 @@ struct sctp_association {
struct list_head asocs; struct list_head asocs;
/* This is a signature that lets us know that this is a /* This is a signature that lets us know that this is a
* sctp_association_t data structure. Used for mapping an * struct sctp_association data structure. Used for mapping an
* association id to an association. * association id to an association.
*/ */
__u32 eyecatcher; __u32 eyecatcher;
...@@ -1556,44 +1559,46 @@ enum { ...@@ -1556,44 +1559,46 @@ enum {
}; };
/* Recover the outter association structure. */ /* Recover the outter association structure. */
static inline sctp_association_t *sctp_assoc(sctp_endpoint_common_t *base) static inline struct sctp_association *sctp_assoc(sctp_endpoint_common_t *base)
{ {
sctp_association_t *asoc; struct sctp_association *asoc;
asoc = container_of(base, sctp_association_t, base); asoc = container_of(base, struct sctp_association, base);
return asoc; return asoc;
} }
/* These are function signatures for manipulating associations. */ /* These are function signatures for manipulating associations. */
sctp_association_t * struct sctp_association *
sctp_association_new(const sctp_endpoint_t *, const struct sock *, sctp_association_new(const sctp_endpoint_t *, const struct sock *,
sctp_scope_t scope, int priority); sctp_scope_t scope, int gfp);
sctp_association_t * struct sctp_association *
sctp_association_init(sctp_association_t *, const sctp_endpoint_t *, sctp_association_init(struct sctp_association *, const sctp_endpoint_t *,
const struct sock *, sctp_scope_t scope, const struct sock *, sctp_scope_t scope,
int priority); int gfp);
void sctp_association_free(sctp_association_t *); void sctp_association_free(struct sctp_association *);
void sctp_association_put(sctp_association_t *); void sctp_association_put(struct sctp_association *);
void sctp_association_hold(sctp_association_t *); void sctp_association_hold(struct sctp_association *);
struct sctp_transport *sctp_assoc_choose_shutdown_transport(sctp_association_t *); struct sctp_transport *sctp_assoc_choose_shutdown_transport(
void sctp_assoc_update_retran_path(sctp_association_t *); struct sctp_association *);
struct sctp_transport *sctp_assoc_lookup_paddr(const sctp_association_t *, void sctp_assoc_update_retran_path(struct sctp_association *);
struct sctp_transport *sctp_assoc_lookup_paddr(const struct sctp_association *,
const union sctp_addr *); const union sctp_addr *);
struct sctp_transport *sctp_assoc_add_peer(sctp_association_t *, struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *,
const union sctp_addr *address, const union sctp_addr *address,
const int priority); const int gfp);
void sctp_assoc_control_transport(struct sctp_association *, void sctp_assoc_control_transport(struct sctp_association *,
struct sctp_transport *, struct sctp_transport *,
sctp_transport_cmd_t, sctp_sn_error_t); sctp_transport_cmd_t, sctp_sn_error_t);
struct sctp_transport *sctp_assoc_lookup_tsn(sctp_association_t *, __u32); struct sctp_transport *sctp_assoc_lookup_tsn(struct sctp_association *, __u32);
struct sctp_transport *sctp_assoc_is_match(sctp_association_t *, struct sctp_transport *sctp_assoc_is_match(struct sctp_association *,
const union sctp_addr *, const union sctp_addr *,
const union sctp_addr *); const union sctp_addr *);
void sctp_assoc_migrate(sctp_association_t *, struct sock *); void sctp_assoc_migrate(struct sctp_association *, struct sock *);
void sctp_assoc_update(sctp_association_t *dst, sctp_association_t *src); void sctp_assoc_update(struct sctp_association *old,
struct sctp_association *new);
__u32 sctp_association_get_next_tsn(struct sctp_association *); __u32 sctp_association_get_next_tsn(struct sctp_association *);
__u32 sctp_association_get_tsn_block(struct sctp_association *, int); __u32 sctp_association_get_tsn_block(struct sctp_association *, int);
...@@ -1603,14 +1608,14 @@ void sctp_assoc_rwnd_increase(struct sctp_association *, int); ...@@ -1603,14 +1608,14 @@ void sctp_assoc_rwnd_increase(struct sctp_association *, int);
void sctp_assoc_rwnd_decrease(struct sctp_association *, int); void sctp_assoc_rwnd_decrease(struct sctp_association *, int);
void sctp_assoc_set_primary(struct sctp_association *, void sctp_assoc_set_primary(struct sctp_association *,
struct sctp_transport *); struct sctp_transport *);
int sctp_assoc_set_bind_addr_from_ep(sctp_association_t *, int); int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *, int);
int sctp_assoc_set_bind_addr_from_cookie(sctp_association_t *, int sctp_assoc_set_bind_addr_from_cookie(struct sctp_association *,
sctp_cookie_t *, int); sctp_cookie_t *, int gfp);
int sctp_cmp_addr_exact(const union sctp_addr *ss1, int sctp_cmp_addr_exact(const union sctp_addr *ss1,
const union sctp_addr *ss2); const union sctp_addr *ss2);
sctp_chunk_t *sctp_get_ecne_prepend(sctp_association_t *asoc); sctp_chunk_t *sctp_get_ecne_prepend(struct sctp_association *asoc);
sctp_chunk_t *sctp_get_no_prepend(sctp_association_t *asoc); sctp_chunk_t *sctp_get_no_prepend(struct sctp_association *asoc);
/* A convenience structure to parse out SCTP specific CMSGs. */ /* A convenience structure to parse out SCTP specific CMSGs. */
typedef struct sctp_cmsgs { typedef struct sctp_cmsgs {
......
include/net/sctp/ulpevent.h
View file @ 381a2af8
...@@ -38,7 +38,6 @@ ...@@ -38,7 +38,6 @@
* be incorporated into the next SCTP release. * be incorporated into the next SCTP release.
*/ */
#ifndef __sctp_ulpevent_h__ #ifndef __sctp_ulpevent_h__
#define __sctp_ulpevent_h__ #define __sctp_ulpevent_h__
...@@ -50,6 +49,7 @@ struct sctp_ulpevent { ...@@ -50,6 +49,7 @@ struct sctp_ulpevent {
struct sctp_association *asoc; struct sctp_association *asoc;
struct sctp_sndrcvinfo sndrcvinfo; struct sctp_sndrcvinfo sndrcvinfo;
int msg_flags; int msg_flags;
int iif;
}; };
/* Retrieve the skb this event sits inside of. */ /* Retrieve the skb this event sits inside of. */
......
net/sctp/associola.c
View file @ 381a2af8
...@@ -290,14 +290,18 @@ sctp_association_t *sctp_association_init(sctp_association_t *asoc, ...@@ -290,14 +290,18 @@ sctp_association_t *sctp_association_init(sctp_association_t *asoc,
*/ */
void sctp_association_free(sctp_association_t *asoc) void sctp_association_free(sctp_association_t *asoc)
{ {
struct sock *sk = asoc->base.sk;
struct sctp_transport *transport; struct sctp_transport *transport;
sctp_endpoint_t *ep;
struct list_head *pos, *temp; struct list_head *pos, *temp;
int i; int i;
ep = asoc->ep;
list_del(&asoc->asocs); list_del(&asoc->asocs);
/* Decrement the backlog value for a TCP-style listening socket. */
if ((SCTP_SOCKET_TCP == sctp_sk(sk)->type) &&
(SCTP_SS_LISTENING == sk->state))
sk->ack_backlog--;
/* Mark as dead, so other users can know this structure is /* Mark as dead, so other users can know this structure is
* going away. * going away.
*/ */
...@@ -421,8 +425,7 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, ...@@ -421,8 +425,7 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
SCTP_DEBUG_PRINTK("sctp_assoc_add_peer:association %p PMTU set to " SCTP_DEBUG_PRINTK("sctp_assoc_add_peer:association %p PMTU set to "
"%d\n", asoc, asoc->pmtu); "%d\n", asoc, asoc->pmtu);
asoc->frag_point = asoc->pmtu; asoc->frag_point = sctp_frag_point(asoc->pmtu);
asoc->frag_point -= SCTP_IP_OVERHEAD + sizeof(struct sctp_data_chunk);
/* The asoc->peer.port might not be meaningful yet, but /* The asoc->peer.port might not be meaningful yet, but
* initialize the packet structure anyway. * initialize the packet structure anyway.
...@@ -642,8 +645,6 @@ __u32 sctp_association_get_tsn_block(sctp_association_t *asoc, int num) ...@@ -642,8 +645,6 @@ __u32 sctp_association_get_tsn_block(sctp_association_t *asoc, int num)
/* Compare two addresses to see if they match. Wildcard addresses /* Compare two addresses to see if they match. Wildcard addresses
* only match themselves. * only match themselves.
*
* FIXME: We do not match address scopes correctly.
*/ */
int sctp_cmp_addr_exact(const union sctp_addr *ss1, int sctp_cmp_addr_exact(const union sctp_addr *ss1,
const union sctp_addr *ss2) const union sctp_addr *ss2)
...@@ -651,38 +652,27 @@ int sctp_cmp_addr_exact(const union sctp_addr *ss1, ...@@ -651,38 +652,27 @@ int sctp_cmp_addr_exact(const union sctp_addr *ss1,
struct sctp_af *af; struct sctp_af *af;
af = sctp_get_af_specific(ss1->sa.sa_family); af = sctp_get_af_specific(ss1->sa.sa_family);
if (!af) if (unlikely(!af))
return 0; return 0;
return af->cmp_addr(ss1, ss2); return af->cmp_addr(ss1, ss2);
} }
/* Return an ecne chunk to get prepended to a packet. /* Return an ecne chunk to get prepended to a packet.
* Note: We are sly and return a shared, prealloced chunk. * Note: We are sly and return a shared, prealloced chunk. FIXME:
* No we don't, but we could/should.
*/ */
sctp_chunk_t *sctp_get_ecne_prepend(sctp_association_t *asoc) sctp_chunk_t *sctp_get_ecne_prepend(struct sctp_association *asoc)
{ {
sctp_chunk_t *chunk; struct sctp_chunk *chunk;
int need_ecne;
__u32 lowest_tsn;
/* Can be called from task or bh. Both need_ecne and
* last_ecne_tsn are written during bh.
*/
need_ecne = asoc->need_ecne;
lowest_tsn = asoc->last_ecne_tsn;
if (need_ecne) {
chunk = sctp_make_ecne(asoc, lowest_tsn);
/* ECNE is not mandatory to the flow. Being unable to /* Send ECNE if needed.
* alloc mem is not deadly. We are just unable to help * Not being able to allocate a chunk here is not deadly.
* out the network. If we run out of memory, just return
* NULL.
*/ */
} else { if (asoc->need_ecne)
chunk = sctp_make_ecne(asoc, asoc->last_ecne_tsn);
else
chunk = NULL; chunk = NULL;
}
return chunk; return chunk;
} }
...@@ -832,12 +822,17 @@ static void sctp_assoc_bh_rcv(sctp_association_t *asoc) ...@@ -832,12 +822,17 @@ static void sctp_assoc_bh_rcv(sctp_association_t *asoc)
void sctp_assoc_migrate(sctp_association_t *assoc, struct sock *newsk) void sctp_assoc_migrate(sctp_association_t *assoc, struct sock *newsk)
{ {
struct sctp_opt *newsp = sctp_sk(newsk); struct sctp_opt *newsp = sctp_sk(newsk);
struct sock *oldsk = assoc->base.sk;
/* Delete the association from the old endpoint's list of /* Delete the association from the old endpoint's list of
* associations. * associations.
*/ */
list_del(&assoc->asocs); list_del(&assoc->asocs);
/* Decrement the backlog value for a TCP-style socket. */
if (SCTP_SOCKET_TCP == sctp_sk(oldsk)->type)
oldsk->ack_backlog--;
/* Release references to the old endpoint and the sock. */ /* Release references to the old endpoint and the sock. */
sctp_endpoint_put(assoc->ep); sctp_endpoint_put(assoc->ep);
sock_put(assoc->base.sk); sock_put(assoc->base.sk);
...@@ -986,8 +981,7 @@ void sctp_assoc_sync_pmtu(sctp_association_t *asoc) ...@@ -986,8 +981,7 @@ void sctp_assoc_sync_pmtu(sctp_association_t *asoc)
if (pmtu) { if (pmtu) {
asoc->pmtu = pmtu; asoc->pmtu = pmtu;
asoc->frag_point = pmtu - (SCTP_IP_OVERHEAD + asoc->frag_point = sctp_frag_point(pmtu);
sizeof(sctp_data_chunk_t));
} }
SCTP_DEBUG_PRINTK("%s: asoc:%p, pmtu:%d, frag_point:%d\n", SCTP_DEBUG_PRINTK("%s: asoc:%p, pmtu:%d, frag_point:%d\n",
...@@ -1077,7 +1071,7 @@ void sctp_assoc_rwnd_decrease(sctp_association_t *asoc, int len) ...@@ -1077,7 +1071,7 @@ void sctp_assoc_rwnd_decrease(sctp_association_t *asoc, int len)
/* Build the bind address list for the association based on info from the /* Build the bind address list for the association based on info from the
* local endpoint and the remote peer. * local endpoint and the remote peer.
*/ */
int sctp_assoc_set_bind_addr_from_ep(sctp_association_t *asoc, int priority) int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *asoc, int gfp)
{ {
sctp_scope_t scope; sctp_scope_t scope;
int flags; int flags;
...@@ -1094,19 +1088,17 @@ int sctp_assoc_set_bind_addr_from_ep(sctp_association_t *asoc, int priority) ...@@ -1094,19 +1088,17 @@ int sctp_assoc_set_bind_addr_from_ep(sctp_association_t *asoc, int priority)
return sctp_bind_addr_copy(&asoc->base.bind_addr, return sctp_bind_addr_copy(&asoc->base.bind_addr,
&asoc->ep->base.bind_addr, &asoc->ep->base.bind_addr,
scope, priority, flags); scope, gfp, flags);
} }
/* Build the association's bind address list from the cookie. */ /* Build the association's bind address list from the cookie. */
int sctp_assoc_set_bind_addr_from_cookie(sctp_association_t *asoc, int sctp_assoc_set_bind_addr_from_cookie(sctp_association_t *asoc,
sctp_cookie_t *cookie, int priority) sctp_cookie_t *cookie, int gfp)
{ {
int var_size2 = ntohs(cookie->peer_init->chunk_hdr.length); int var_size2 = ntohs(cookie->peer_init->chunk_hdr.length);
int var_size3 = cookie->raw_addr_list_len; int var_size3 = cookie->raw_addr_list_len;
__u8 *raw_addr_list = (__u8 *)cookie + sizeof(sctp_cookie_t) + __u8 *raw = (__u8 *)cookie + sizeof(sctp_cookie_t) + var_size2;
var_size2;
return sctp_raw_to_bind_addrs(&asoc->base.bind_addr, raw_addr_list, return sctp_raw_to_bind_addrs(&asoc->base.bind_addr, raw, var_size3,
var_size3, asoc->ep->base.bind_addr.port, asoc->ep->base.bind_addr.port, gfp);
priority);
} }
net/sctp/bind_addr.c
View file @ 381a2af8
...@@ -53,7 +53,7 @@ ...@@ -53,7 +53,7 @@
/* Forward declarations for internal helpers. */ /* Forward declarations for internal helpers. */
static int sctp_copy_one_addr(sctp_bind_addr_t *, union sctp_addr *, static int sctp_copy_one_addr(sctp_bind_addr_t *, union sctp_addr *,
sctp_scope_t scope, int priority, int flags); sctp_scope_t scope, int gfp, int flags);
static void sctp_bind_addr_clean(sctp_bind_addr_t *); static void sctp_bind_addr_clean(sctp_bind_addr_t *);
/* First Level Abstractions. */ /* First Level Abstractions. */
...@@ -62,7 +62,7 @@ static void sctp_bind_addr_clean(sctp_bind_addr_t *); ...@@ -62,7 +62,7 @@ static void sctp_bind_addr_clean(sctp_bind_addr_t *);
* in 'src' which have a broader scope than 'scope'. * in 'src' which have a broader scope than 'scope'.
*/ */
int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src, int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src,
sctp_scope_t scope, int priority, int flags) sctp_scope_t scope, int gfp, int flags)
{ {
struct sockaddr_storage_list *addr; struct sockaddr_storage_list *addr;
struct list_head *pos; struct list_head *pos;
...@@ -75,7 +75,7 @@ int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src, ...@@ -75,7 +75,7 @@ int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src,
list_for_each(pos, &src->address_list) { list_for_each(pos, &src->address_list) {
addr = list_entry(pos, struct sockaddr_storage_list, list); addr = list_entry(pos, struct sockaddr_storage_list, list);
error = sctp_copy_one_addr(dest, &addr->a, scope, error = sctp_copy_one_addr(dest, &addr->a, scope,
priority, flags); gfp, flags);
if (error < 0) if (error < 0)
goto out; goto out;
} }
...@@ -88,11 +88,11 @@ int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src, ...@@ -88,11 +88,11 @@ int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src,
} }
/* Create a new SCTP_bind_addr from nothing. */ /* Create a new SCTP_bind_addr from nothing. */
sctp_bind_addr_t *sctp_bind_addr_new(int priority) sctp_bind_addr_t *sctp_bind_addr_new(int gfp)
{ {
sctp_bind_addr_t *retval; sctp_bind_addr_t *retval;
retval = t_new(sctp_bind_addr_t, priority); retval = t_new(sctp_bind_addr_t, gfp);
if (!retval) if (!retval)
goto nomem; goto nomem;
...@@ -144,12 +144,12 @@ void sctp_bind_addr_free(sctp_bind_addr_t *bp) ...@@ -144,12 +144,12 @@ void sctp_bind_addr_free(sctp_bind_addr_t *bp)
/* Add an address to the bind address list in the SCTP_bind_addr structure. */ /* Add an address to the bind address list in the SCTP_bind_addr structure. */
int sctp_add_bind_addr(sctp_bind_addr_t *bp, union sctp_addr *new, int sctp_add_bind_addr(sctp_bind_addr_t *bp, union sctp_addr *new,
int priority) int gfp)
{ {
struct sockaddr_storage_list *addr; struct sockaddr_storage_list *addr;
/* Add the address to the bind address list. */ /* Add the address to the bind address list. */
addr = t_new(struct sockaddr_storage_list, priority); addr = t_new(struct sockaddr_storage_list, gfp);
if (!addr) if (!addr)
return -ENOMEM; return -ENOMEM;
...@@ -197,7 +197,7 @@ int sctp_del_bind_addr(sctp_bind_addr_t *bp, union sctp_addr *del_addr) ...@@ -197,7 +197,7 @@ int sctp_del_bind_addr(sctp_bind_addr_t *bp, union sctp_addr *del_addr)
* The second argument is the return value for the length. * The second argument is the return value for the length.
*/ */
union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp, union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp,
int *addrs_len, int priority) int *addrs_len, int gfp)
{ {
union sctp_params addrparms; union sctp_params addrparms;
union sctp_params retval; union sctp_params retval;
...@@ -214,7 +214,7 @@ union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp, ...@@ -214,7 +214,7 @@ union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp,
len += sizeof(sctp_addr_param_t); len += sizeof(sctp_addr_param_t);
} }
retval.v = kmalloc(len, priority); retval.v = kmalloc(len, gfp);
if (!retval.v) if (!retval.v)
goto end_raw; goto end_raw;
...@@ -238,7 +238,7 @@ union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp, ...@@ -238,7 +238,7 @@ union sctp_params sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp,
* address parameters). * address parameters).
*/ */
int sctp_raw_to_bind_addrs(sctp_bind_addr_t *bp, __u8 *raw_addr_list, int sctp_raw_to_bind_addrs(sctp_bind_addr_t *bp, __u8 *raw_addr_list,
int addrs_len, __u16 port, int priority) int addrs_len, __u16 port, int gfp)
{ {
sctp_addr_param_t *rawaddr; sctp_addr_param_t *rawaddr;
sctp_paramhdr_t *param; sctp_paramhdr_t *param;
...@@ -254,8 +254,8 @@ int sctp_raw_to_bind_addrs(sctp_bind_addr_t *bp, __u8 *raw_addr_list, ...@@ -254,8 +254,8 @@ int sctp_raw_to_bind_addrs(sctp_bind_addr_t *bp, __u8 *raw_addr_list,
switch (param->type) { switch (param->type) {
case SCTP_PARAM_IPV4_ADDRESS: case SCTP_PARAM_IPV4_ADDRESS:
case SCTP_PARAM_IPV6_ADDRESS: case SCTP_PARAM_IPV6_ADDRESS:
sctp_param2sockaddr(&addr, rawaddr, port); sctp_param2sockaddr(&addr, rawaddr, port, 0);
retval = sctp_add_bind_addr(bp, &addr, priority); retval = sctp_add_bind_addr(bp, &addr, gfp);
if (retval) { if (retval) {
/* Can't finish building the list, clean up. */ /* Can't finish building the list, clean up. */
sctp_bind_addr_clean(bp); sctp_bind_addr_clean(bp);
...@@ -300,14 +300,14 @@ int sctp_bind_addr_match(sctp_bind_addr_t *bp, const union sctp_addr *addr, ...@@ -300,14 +300,14 @@ int sctp_bind_addr_match(sctp_bind_addr_t *bp, const union sctp_addr *addr,
/* Copy out addresses from the global local address list. */ /* Copy out addresses from the global local address list. */
static int sctp_copy_one_addr(sctp_bind_addr_t *dest, union sctp_addr *addr, static int sctp_copy_one_addr(sctp_bind_addr_t *dest, union sctp_addr *addr,
sctp_scope_t scope, int priority, int flags) sctp_scope_t scope, int gfp, int flags)
{ {
struct sctp_protocol *proto = sctp_get_protocol(); struct sctp_protocol *proto = sctp_get_protocol();
int error = 0; int error = 0;
if (sctp_is_any(addr)) { if (sctp_is_any(addr)) {
error = sctp_copy_local_addr_list(proto, dest, scope, error = sctp_copy_local_addr_list(proto, dest, scope,
priority, flags); gfp, flags);
} else if (sctp_in_scope(addr, scope)) { } else if (sctp_in_scope(addr, scope)) {
/* Now that the address is in scope, check to see if /* Now that the address is in scope, check to see if
* the address type is supported by local sock as * the address type is supported by local sock as
...@@ -318,7 +318,7 @@ static int sctp_copy_one_addr(sctp_bind_addr_t *dest, union sctp_addr *addr, ...@@ -318,7 +318,7 @@ static int sctp_copy_one_addr(sctp_bind_addr_t *dest, union sctp_addr *addr,
(((AF_INET6 == addr->sa.sa_family) && (((AF_INET6 == addr->sa.sa_family) &&
(flags & SCTP_ADDR6_ALLOWED) && (flags & SCTP_ADDR6_ALLOWED) &&
(flags & SCTP_ADDR6_PEERSUPP)))) (flags & SCTP_ADDR6_PEERSUPP))))
error = sctp_add_bind_addr(dest, addr, priority); error = sctp_add_bind_addr(dest, addr, gfp);
} }
return error; return error;
......
net/sctp/endpointola.c
View file @ 381a2af8
...@@ -177,8 +177,15 @@ sctp_endpoint_t *sctp_endpoint_init(sctp_endpoint_t *ep, ...@@ -177,8 +177,15 @@ sctp_endpoint_t *sctp_endpoint_init(sctp_endpoint_t *ep,
/* Add an association to an endpoint. */ /* Add an association to an endpoint. */
void sctp_endpoint_add_asoc(sctp_endpoint_t *ep, sctp_association_t *asoc) void sctp_endpoint_add_asoc(sctp_endpoint_t *ep, sctp_association_t *asoc)
{ {
struct sock *sk = ep->base.sk;
/* Now just add it to our list of asocs */ /* Now just add it to our list of asocs */
list_add_tail(&asoc->asocs, &ep->asocs); list_add_tail(&asoc->asocs, &ep->asocs);
/* Increment the backlog value for a TCP-style listening socket. */
if ((SCTP_SOCKET_TCP == sctp_sk(sk)->type) &&
(SCTP_SS_LISTENING == sk->state))
sk->ack_backlog++;
} }
/* Free the endpoint structure. Delay cleanup until /* Free the endpoint structure. Delay cleanup until
......
net/sctp/input.c
View file @ 381a2af8
...@@ -207,21 +207,19 @@ int sctp_rcv(struct sk_buff *skb) ...@@ -207,21 +207,19 @@ int sctp_rcv(struct sk_buff *skb)
*/ */
sctp_bh_lock_sock(sk); sctp_bh_lock_sock(sk);
if (sock_owned_by_user(sk)) { if (sock_owned_by_user(sk))
sk_add_backlog(sk, (struct sk_buff *) chunk); sk_add_backlog(sk, (struct sk_buff *) chunk);
} else { else
sctp_backlog_rcv(sk, (struct sk_buff *) chunk); sctp_backlog_rcv(sk, (struct sk_buff *) chunk);
}
/* Release the sock and any reference counts we took in the /* Release the sock and any reference counts we took in the
* lookup calls. * lookup calls.
*/ */
sctp_bh_unlock_sock(sk); sctp_bh_unlock_sock(sk);
if (asoc) { if (asoc)
sctp_association_put(asoc); sctp_association_put(asoc);
} else { else
sctp_endpoint_put(ep); sctp_endpoint_put(ep);
}
sock_put(sk); sock_put(sk);
return ret; return ret;
...@@ -268,10 +266,8 @@ int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb) ...@@ -268,10 +266,8 @@ int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
} }
/* Handle icmp frag needed error. */ /* Handle icmp frag needed error. */
static inline void sctp_icmp_frag_needed(struct sock *sk, void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
sctp_association_t *asoc, struct sctp_transport *t, __u32 pmtu)
struct sctp_transport *transport,
__u32 pmtu)
{ {
if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) { if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) {
printk(KERN_WARNING "%s: Reported pmtu %d too low, " printk(KERN_WARNING "%s: Reported pmtu %d too low, "
...@@ -280,54 +276,38 @@ static inline void sctp_icmp_frag_needed(struct sock *sk, ...@@ -280,54 +276,38 @@ static inline void sctp_icmp_frag_needed(struct sock *sk,
pmtu = SCTP_DEFAULT_MINSEGMENT; pmtu = SCTP_DEFAULT_MINSEGMENT;
} }
if (!sock_owned_by_user(sk) && transport && (transport->pmtu != pmtu)) { if (!sock_owned_by_user(sk) && t && (t->pmtu != pmtu)) {
transport->pmtu = pmtu; t->pmtu = pmtu;
sctp_assoc_sync_pmtu(asoc); sctp_assoc_sync_pmtu(asoc);
sctp_retransmit(&asoc->outqueue, transport, sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
SCTP_RETRANSMIT_PMTU_DISCOVERY );
} }
} }
/* /* Common lookup code for icmp/icmpv6 error handler. */
* This routine is called by the ICMP module when it gets some struct sock *sctp_err_lookup(int family, struct sk_buff *skb,
* sort of error condition. If err < 0 then the socket should struct sctphdr *sctphdr,
* be closed and the error returned to the user. If err > 0 struct sctp_endpoint **epp,
* it's just the icmp type << 8 | icmp code. After adjustment struct sctp_association **app,
* header points to the first 8 bytes of the sctp header. We need struct sctp_transport **tpp)
* to find the appropriate port.
*
* The locking strategy used here is very "optimistic". When
* someone else accesses the socket the ICMP is just dropped
* and for some paths there is no check at all.
* A more general error queue to queue errors for later handling
* is probably better.
*
*/
void sctp_v4_err(struct sk_buff *skb, __u32 info)
{ {
struct iphdr *iph = (struct iphdr *)skb->data; union sctp_addr saddr;
struct sctphdr *sh = (struct sctphdr *)(skb->data + (iph->ihl <<2)); union sctp_addr daddr;
int type = skb->h.icmph->type; struct sctp_af *af;
int code = skb->h.icmph->code;
union sctp_addr saddr, daddr;
struct inet_opt *inet;
struct sock *sk = NULL; struct sock *sk = NULL;
sctp_endpoint_t *ep = NULL; struct sctp_endpoint *ep = NULL;
sctp_association_t *asoc = NULL; struct sctp_association *asoc = NULL;
struct sctp_transport *transport; struct sctp_transport *transport = NULL;
int err;
if (skb->len < ((iph->ihl << 2) + 8)) { *app = NULL; *epp = NULL; *tpp = NULL;
ICMP_INC_STATS_BH(IcmpInErrors);
return; af = sctp_get_af_specific(family);
if (unlikely(!af)) {
return NULL;
} }
saddr.v4.sin_family = AF_INET; /* Initialize local addresses for lookups. */
saddr.v4.sin_port = ntohs(sh->source); af->from_skb(&saddr, skb, 1);
memcpy(&saddr.v4.sin_addr.s_addr, &iph->saddr, sizeof(struct in_addr)); af->from_skb(&daddr, skb, 0);
daddr.v4.sin_family = AF_INET;
daddr.v4.sin_port = ntohs(sh->dest);
memcpy(&daddr.v4.sin_addr.s_addr, &iph->daddr, sizeof(struct in_addr));
/* Look for an association that matches the incoming ICMP error /* Look for an association that matches the incoming ICMP error
* packet. * packet.
...@@ -340,13 +320,12 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) ...@@ -340,13 +320,12 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info)
*/ */
ep = __sctp_rcv_lookup_endpoint(&daddr); ep = __sctp_rcv_lookup_endpoint(&daddr);
if (!ep) { if (!ep) {
ICMP_INC_STATS_BH(IcmpInErrors); return NULL;
return;
} }
} }
if (asoc) { if (asoc) {
if (ntohl(sh->vtag) != asoc->c.peer_vtag) { if (ntohl(sctphdr->vtag) != asoc->c.peer_vtag) {
ICMP_INC_STATS_BH(IcmpInErrors); ICMP_INC_STATS_BH(IcmpInErrors);
goto out; goto out;
} }
...@@ -355,12 +334,90 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) ...@@ -355,12 +334,90 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info)
sk = ep->base.sk; sk = ep->base.sk;
sctp_bh_lock_sock(sk); sctp_bh_lock_sock(sk);
/* If too many ICMPs get dropped on busy /* If too many ICMPs get dropped on busy
* servers this needs to be solved differently. * servers this needs to be solved differently.
*/ */
if (sock_owned_by_user(sk)) if (sock_owned_by_user(sk))
NET_INC_STATS_BH(LockDroppedIcmps); NET_INC_STATS_BH(LockDroppedIcmps);
*epp = ep;
*app = asoc;
*tpp = transport;
return sk;
out:
sock_put(sk);
if (asoc)
sctp_association_put(asoc);
if (ep)
sctp_endpoint_put(ep);
return NULL;
}
/* Common cleanup code for icmp/icmpv6 error handler. */
void sctp_err_finish(struct sock *sk, struct sctp_endpoint *ep,
struct sctp_association *asoc)
{
sctp_bh_unlock_sock(sk);
sock_put(sk);
if (asoc)
sctp_association_put(asoc);
if (ep)
sctp_endpoint_put(ep);
}
/*
* This routine is called by the ICMP module when it gets some
* sort of error condition. If err < 0 then the socket should
* be closed and the error returned to the user. If err > 0
* it's just the icmp type << 8 | icmp code. After adjustment
* header points to the first 8 bytes of the sctp header. We need
* to find the appropriate port.
*
* The locking strategy used here is very "optimistic". When
* someone else accesses the socket the ICMP is just dropped
* and for some paths there is no check at all.
* A more general error queue to queue errors for later handling
* is probably better.
*
*/
void sctp_v4_err(struct sk_buff *skb, __u32 info)
{
struct iphdr *iph = (struct iphdr *)skb->data;
struct sctphdr *sh = (struct sctphdr *)(skb->data + (iph->ihl <<2));
int type = skb->h.icmph->type;
int code = skb->h.icmph->code;
struct sock *sk;
sctp_endpoint_t *ep;
sctp_association_t *asoc;
struct sctp_transport *transport;
struct inet_opt *inet;
char *saveip, *savesctp;
int err;
if (skb->len < ((iph->ihl << 2) + 8)) {
ICMP_INC_STATS_BH(IcmpInErrors);
return;
}
/* Fix up skb to look at the embedded net header. */
saveip = skb->nh.raw;
savesctp = skb->h.raw;
skb->nh.iph = iph;
skb->h.raw = (char *)sh;
sk = sctp_err_lookup(AF_INET, skb, sh, &ep, &asoc, &transport);
/* Put back, the original pointers. */
skb->nh.raw = saveip;
skb->h.raw = savesctp;
if (!sk) {
ICMP_INC_STATS_BH(IcmpInErrors);
return;
}
/* Warning: The sock lock is held. Remember to call
* sctp_err_finish!
*/
switch (type) { switch (type) {
case ICMP_PARAMETERPROB: case ICMP_PARAMETERPROB:
err = EPROTO; err = EPROTO;
...@@ -399,13 +456,7 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) ...@@ -399,13 +456,7 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info)
} }
out_unlock: out_unlock:
sctp_bh_unlock_sock(sk); sctp_err_finish(sk, ep, asoc);
out:
sock_put(sk);
if (asoc)
sctp_association_put(asoc);
if (ep)
sctp_endpoint_put(ep);
} }
/* /*
...@@ -623,9 +674,9 @@ void __sctp_unhash_established(sctp_association_t *asoc) ...@@ -623,9 +674,9 @@ void __sctp_unhash_established(sctp_association_t *asoc)
} }
/* Look up an association. */ /* Look up an association. */
sctp_association_t *__sctp_lookup_association(const union sctp_addr *laddr, sctp_association_t *__sctp_lookup_association(const union sctp_addr *local,
const union sctp_addr *paddr, const union sctp_addr *peer,
struct sctp_transport **transportp) struct sctp_transport **pt)
{ {
sctp_hashbucket_t *head; sctp_hashbucket_t *head;
sctp_endpoint_common_t *epb; sctp_endpoint_common_t *epb;
...@@ -636,12 +687,12 @@ sctp_association_t *__sctp_lookup_association(const union sctp_addr *laddr, ...@@ -636,12 +687,12 @@ sctp_association_t *__sctp_lookup_association(const union sctp_addr *laddr,
/* Optimize here for direct hit, only listening connections can /* Optimize here for direct hit, only listening connections can
* have wildcards anyways. * have wildcards anyways.
*/ */
hash = sctp_assoc_hashfn(laddr->v4.sin_port, paddr->v4.sin_port); hash = sctp_assoc_hashfn(local->v4.sin_port, peer->v4.sin_port);
head = &sctp_proto.assoc_hashbucket[hash]; head = &sctp_proto.assoc_hashbucket[hash];
read_lock(&head->lock); read_lock(&head->lock);
for (epb = head->chain; epb; epb = epb->next) { for (epb = head->chain; epb; epb = epb->next) {
asoc = sctp_assoc(epb); asoc = sctp_assoc(epb);
transport = sctp_assoc_is_match(asoc, laddr, paddr); transport = sctp_assoc_is_match(asoc, local, peer);
if (transport) if (transport)
goto hit; goto hit;
} }
...@@ -651,7 +702,7 @@ sctp_association_t *__sctp_lookup_association(const union sctp_addr *laddr, ...@@ -651,7 +702,7 @@ sctp_association_t *__sctp_lookup_association(const union sctp_addr *laddr,
return NULL; return NULL;
hit: hit:
*transportp = transport; *pt = transport;
sctp_association_hold(asoc); sctp_association_hold(asoc);
sock_hold(epb->sk); sock_hold(epb->sk);
read_unlock(&head->lock); read_unlock(&head->lock);
...@@ -754,7 +805,7 @@ static sctp_association_t *__sctp_rcv_init_lookup(struct sk_buff *skb, ...@@ -754,7 +805,7 @@ static sctp_association_t *__sctp_rcv_init_lookup(struct sk_buff *skb,
(SCTP_PARAM_IPV6_ADDRESS != params.p->type)) (SCTP_PARAM_IPV6_ADDRESS != params.p->type))
continue; continue;
sctp_param2sockaddr(paddr, params.addr, ntohs(sh->source)); sctp_param2sockaddr(paddr, params.addr, ntohs(sh->source), 0);
asoc = __sctp_lookup_association(laddr, paddr, transportp); asoc = __sctp_lookup_association(laddr, paddr, transportp);
if (asoc) if (asoc)
return asoc; return asoc;
...@@ -782,8 +833,3 @@ sctp_association_t *__sctp_rcv_lookup(struct sk_buff *skb, ...@@ -782,8 +833,3 @@ sctp_association_t *__sctp_rcv_lookup(struct sk_buff *skb,
return asoc; return asoc;
} }
net/sctp/ipv6.c
View file @ 381a2af8
/* SCTP kernel reference Implementation /* SCTP kernel reference Implementation
* Copyright (c) 2001 Nokia, Inc. * Copyright (c) 2001 Nokia, Inc.
* Copyright (c) 2001 La Monte H.P. Yarroll * Copyright (c) 2001 La Monte H.P. Yarroll
* Copyright (c) 2002 International Business Machines, Corp. * Copyright (c) 2002-2003 International Business Machines, Corp.
* *
* This file is part of the SCTP kernel reference Implementation * This file is part of the SCTP kernel reference Implementation
* *
...@@ -88,17 +88,62 @@ extern struct notifier_block sctp_inetaddr_notifier; ...@@ -88,17 +88,62 @@ extern struct notifier_block sctp_inetaddr_notifier;
ntohs((addr)->s6_addr16[6]), \ ntohs((addr)->s6_addr16[6]), \
ntohs((addr)->s6_addr16[7]) ntohs((addr)->s6_addr16[7])
/* FIXME: Comments. */ /* ICMP error handler. */
static inline void sctp_v6_err(struct sk_buff *skb, void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
struct inet6_skb_parm *opt,
int type, int code, int offset, __u32 info) int type, int code, int offset, __u32 info)
{ {
/* BUG. WRITE ME. */ struct ipv6hdr *iph = (struct ipv6hdr *)skb->data;
struct sctphdr *sh = (struct sctphdr *)(skb->data + offset);
struct sock *sk;
sctp_endpoint_t *ep;
sctp_association_t *asoc;
struct sctp_transport *transport;
struct ipv6_pinfo *np;
char *saveip, *savesctp;
int err;
/* Fix up skb to look at the embedded net header. */
saveip = skb->nh.raw;
savesctp = skb->h.raw;
skb->nh.ipv6h = iph;
skb->h.raw = (char *)sh;
sk = sctp_err_lookup(AF_INET6, skb, sh, &ep, &asoc, &transport);
/* Put back, the original pointers. */
skb->nh.raw = saveip;
skb->h.raw = savesctp;
if (!sk) {
ICMP6_INC_STATS_BH(Icmp6InErrors);
return;
}
/* Warning: The sock lock is held. Remember to call
* sctp_err_finish!
*/
switch (type) {
case ICMPV6_PKT_TOOBIG:
sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info));
goto out_unlock;
default:
break;
}
np = inet6_sk(sk);
icmpv6_err_convert(type, code, &err);
if (!sock_owned_by_user(sk) && np->recverr) {
sk->err = err;
sk->error_report(sk);
} else { /* Only an error on timeout */
sk->err_soft = err;
}
out_unlock:
sctp_err_finish(sk, ep, asoc);
} }
/* Based on tcp_v6_xmit() in tcp_ipv6.c. */ /* Based on tcp_v6_xmit() in tcp_ipv6.c. */
static inline int sctp_v6_xmit(struct sk_buff *skb, static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport,
struct sctp_transport *transport, int ipfragok) int ipfragok)
{ {
struct sock *sk = skb->sk; struct sock *sk = skb->sk;
struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk);
...@@ -116,9 +161,12 @@ static inline int sctp_v6_xmit(struct sk_buff *skb, ...@@ -116,9 +161,12 @@ static inline int sctp_v6_xmit(struct sk_buff *skb,
fl.fl6_flowlabel = np->flow_label; fl.fl6_flowlabel = np->flow_label;
IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel); IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel);
if (ipv6_addr_type(fl.fl6_src) & IPV6_ADDR_LINKLOCAL)
fl.oif = transport->saddr.v6.sin6_scope_id;
else
fl.oif = sk->bound_dev_if; fl.oif = sk->bound_dev_if;
fl.uli_u.ports.sport = inet_sk(sk)->sport; fl.uli_u.ports.sport = inet_sk(sk)->sport;
fl.uli_u.ports.dport = inet_sk(sk)->dport; fl.uli_u.ports.dport = transport->ipaddr.v6.sin6_port;
if (np->opt && np->opt->srcrt) { if (np->opt && np->opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
...@@ -214,7 +262,7 @@ void sctp_v6_get_saddr(sctp_association_t *asoc, struct dst_entry *dst, ...@@ -214,7 +262,7 @@ void sctp_v6_get_saddr(sctp_association_t *asoc, struct dst_entry *dst,
__FUNCTION__, asoc, dst, NIP6(&daddr->v6.sin6_addr)); __FUNCTION__, asoc, dst, NIP6(&daddr->v6.sin6_addr));
if (!asoc) { if (!asoc) {
ipv6_get_saddr(dst, &daddr->v6.sin6_addr, &saddr->v6.sin6_addr); ipv6_get_saddr(dst, &daddr->v6.sin6_addr,&saddr->v6.sin6_addr);
SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: "
"%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
NIP6(&saddr->v6.sin6_addr)); NIP6(&saddr->v6.sin6_addr));
...@@ -279,6 +327,7 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist, ...@@ -279,6 +327,7 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist,
addr->a.v6.sin6_family = AF_INET6; addr->a.v6.sin6_family = AF_INET6;
addr->a.v6.sin6_port = 0; addr->a.v6.sin6_port = 0;
addr->a.v6.sin6_addr = ifp->addr; addr->a.v6.sin6_addr = ifp->addr;
addr->a.v6.sin6_scope_id = dev->ifindex;
INIT_LIST_HEAD(&addr->list); INIT_LIST_HEAD(&addr->list);
list_add_tail(&addr->list, addrlist); list_add_tail(&addr->list, addrlist);
} }
...@@ -299,7 +348,7 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, ...@@ -299,7 +348,7 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb,
port = &addr->v6.sin6_port; port = &addr->v6.sin6_port;
addr->v6.sin6_family = AF_INET6; addr->v6.sin6_family = AF_INET6;
addr->v6.sin6_flowinfo = 0; /* FIXME */ addr->v6.sin6_flowinfo = 0; /* FIXME */
addr->v6.sin6_scope_id = 0; /* FIXME */ addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif;
sh = (struct sctphdr *) skb->h.raw; sh = (struct sctphdr *) skb->h.raw;
if (is_saddr) { if (is_saddr) {
...@@ -336,19 +385,25 @@ static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, ...@@ -336,19 +385,25 @@ static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst,
ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr); ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr);
} }
/* Compare addresses exactly. Well.. almost exactly; ignore scope_id /* Compare addresses exactly.
* for now. FIXME: v4-mapped-v6. * FIXME: v4-mapped-v6.
*/ */
static int sctp_v6_cmp_addr(const union sctp_addr *addr1, static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
const union sctp_addr *addr2) const union sctp_addr *addr2)
{ {
int match;
if (addr1->sa.sa_family != addr2->sa.sa_family) if (addr1->sa.sa_family != addr2->sa.sa_family)
return 0; return 0;
match = !ipv6_addr_cmp((struct in6_addr *)&addr1->v6.sin6_addr, if (ipv6_addr_cmp(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr))
(struct in6_addr *)&addr2->v6.sin6_addr); return 0;
/* If this is a linklocal address, compare the scope_id. */
if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) {
if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id &&
(addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) {
return 0;
}
}
return match; return 1;
} }
/* Initialize addr struct to INADDR_ANY. */ /* Initialize addr struct to INADDR_ANY. */
...@@ -382,7 +437,6 @@ static int sctp_v6_available(const union sctp_addr *addr) ...@@ -382,7 +437,6 @@ static int sctp_v6_available(const union sctp_addr *addr)
return ipv6_chk_addr(in6, NULL); return ipv6_chk_addr(in6, NULL);
} }
/* This function checks if the address is a valid address to be used for /* This function checks if the address is a valid address to be used for
* SCTP. * SCTP.
* *
...@@ -488,6 +542,13 @@ struct sock *sctp_v6_create_accept_sk(struct sock *sk, ...@@ -488,6 +542,13 @@ struct sock *sctp_v6_create_accept_sk(struct sock *sk,
return newsk; return newsk;
} }
/* Where did this skb come from? */
static int sctp_v6_skb_iif(const struct sk_buff *skb)
{
struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb;
return opt->iif;
}
/* Initialize a PF_INET6 socket msg_name. */ /* Initialize a PF_INET6 socket msg_name. */
static void sctp_inet6_msgname(char *msgname, int *addr_len) static void sctp_inet6_msgname(char *msgname, int *addr_len)
{ {
...@@ -496,13 +557,13 @@ static void sctp_inet6_msgname(char *msgname, int *addr_len) ...@@ -496,13 +557,13 @@ static void sctp_inet6_msgname(char *msgname, int *addr_len)
sin6 = (struct sockaddr_in6 *)msgname; sin6 = (struct sockaddr_in6 *)msgname;
sin6->sin6_family = AF_INET6; sin6->sin6_family = AF_INET6;
sin6->sin6_flowinfo = 0; sin6->sin6_flowinfo = 0;
sin6->sin6_scope_id = 0; sin6->sin6_scope_id = 0; /*FIXME */
*addr_len = sizeof(struct sockaddr_in6); *addr_len = sizeof(struct sockaddr_in6);
} }
/* Initialize a PF_INET msgname from a ulpevent. */ /* Initialize a PF_INET msgname from a ulpevent. */
static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, char *msgname, static void sctp_inet6_event_msgname(struct sctp_ulpevent *event,
int *addrlen) char *msgname, int *addrlen)
{ {
struct sockaddr_in6 *sin6, *sin6from; struct sockaddr_in6 *sin6, *sin6from;
...@@ -528,6 +589,8 @@ static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, char *msgname, ...@@ -528,6 +589,8 @@ static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, char *msgname,
sin6from = &event->asoc->peer.primary_addr.v6; sin6from = &event->asoc->peer.primary_addr.v6;
ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr); ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr);
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6->sin6_scope_id = sin6from->sin6_scope_id;
} }
} }
...@@ -546,8 +609,8 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, ...@@ -546,8 +609,8 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname,
/* FIXME: Map ipv4 address into v4-mapped-on-v6 address. */ /* FIXME: Map ipv4 address into v4-mapped-on-v6 address. */
if (__constant_htons(ETH_P_IP) == skb->protocol) { if (__constant_htons(ETH_P_IP) == skb->protocol) {
/* FIXME: Easy, but there was no way to test this /* FIXME: The latest I-D added options for two
* yet. * behaviors.
*/ */
return; return;
} }
...@@ -556,9 +619,8 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, ...@@ -556,9 +619,8 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname,
ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) {
struct inet6_skb_parm *opt = struct sctp_ulpevent *ev = sctp_skb2event(skb);
(struct inet6_skb_parm *) skb->cb; sin6->sin6_scope_id = ev->iif;
sin6->sin6_scope_id = opt->iif;
} }
} }
} }
...@@ -612,14 +674,59 @@ static int sctp_inet6_bind_verify(struct sctp_opt *opt, union sctp_addr *addr) ...@@ -612,14 +674,59 @@ static int sctp_inet6_bind_verify(struct sctp_opt *opt, union sctp_addr *addr)
struct sctp_af *af; struct sctp_af *af;
/* ASSERT: address family has already been verified. */ /* ASSERT: address family has already been verified. */
if (addr->sa.sa_family != AF_INET6) { if (addr->sa.sa_family != AF_INET6)
af = sctp_get_af_specific(addr->sa.sa_family); af = sctp_get_af_specific(addr->sa.sa_family);
} else else {
af = opt->pf->af; struct sock *sk;
int type = ipv6_addr_type(&addr->v6.sin6_addr);
sk = &container_of(opt, struct sctp6_sock, sctp)->sk;
if (type & IPV6_ADDR_LINKLOCAL) {
/* Note: Behavior similar to af_inet6.c:
* 1) Overrides previous bound_dev_if
* 2) Destructive even if bind isn't successful.
*/
if (addr->v6.sin6_scope_id)
sk->bound_dev_if = addr->v6.sin6_scope_id;
if (!sk->bound_dev_if)
return 0;
}
af = opt->pf->af;
}
return af->available(addr); return af->available(addr);
} }
/* Verify that the provided sockaddr looks bindable. Common verification,
* has already been taken care of.
*/
static int sctp_inet6_send_verify(struct sctp_opt *opt, union sctp_addr *addr)
{
struct sctp_af *af = NULL;
/* ASSERT: address family has already been verified. */
if (addr->sa.sa_family != AF_INET6)
af = sctp_get_af_specific(addr->sa.sa_family);
else {
struct sock *sk;
int type = ipv6_addr_type(&addr->v6.sin6_addr);
sk = &container_of(opt, struct sctp6_sock, sctp)->sk;
if (type & IPV6_ADDR_LINKLOCAL) {
/* Note: Behavior similar to af_inet6.c:
* 1) Overrides previous bound_dev_if
* 2) Destructive even if bind isn't successful.
*/
if (addr->v6.sin6_scope_id)
sk->bound_dev_if = addr->v6.sin6_scope_id;
if (!sk->bound_dev_if)
return 0;
}
af = opt->pf->af;
}
return af != NULL;
}
/* Fill in Supported Address Type information for INIT and INIT-ACK /* Fill in Supported Address Type information for INIT and INIT-ACK
* chunks. Note: In the future, we may want to look at sock options * chunks. Note: In the future, we may want to look at sock options
* to determine whether a PF_INET6 socket really wants to have IPV4 * to determine whether a PF_INET6 socket really wants to have IPV4
...@@ -700,6 +807,7 @@ static struct sctp_af sctp_ipv6_specific = { ...@@ -700,6 +807,7 @@ static struct sctp_af sctp_ipv6_specific = {
.inaddr_any = sctp_v6_inaddr_any, .inaddr_any = sctp_v6_inaddr_any,
.is_any = sctp_v6_is_any, .is_any = sctp_v6_is_any,
.available = sctp_v6_available, .available = sctp_v6_available,
.skb_iif = sctp_v6_skb_iif,
.net_header_len = sizeof(struct ipv6hdr), .net_header_len = sizeof(struct ipv6hdr),
.sockaddr_len = sizeof(struct sockaddr_in6), .sockaddr_len = sizeof(struct sockaddr_in6),
.sa_family = AF_INET6, .sa_family = AF_INET6,
...@@ -711,6 +819,7 @@ static struct sctp_pf sctp_pf_inet6_specific = { ...@@ -711,6 +819,7 @@ static struct sctp_pf sctp_pf_inet6_specific = {
.af_supported = sctp_inet6_af_supported, .af_supported = sctp_inet6_af_supported,
.cmp_addr = sctp_inet6_cmp_addr, .cmp_addr = sctp_inet6_cmp_addr,
.bind_verify = sctp_inet6_bind_verify, .bind_verify = sctp_inet6_bind_verify,
.send_verify = sctp_inet6_send_verify,
.supported_addrs = sctp_inet6_supported_addrs, .supported_addrs = sctp_inet6_supported_addrs,
.create_accept_sk = sctp_v6_create_accept_sk, .create_accept_sk = sctp_v6_create_accept_sk,
.af = &sctp_ipv6_specific, .af = &sctp_ipv6_specific,
......
net/sctp/output.c
View file @ 381a2af8
...@@ -79,6 +79,7 @@ struct sctp_packet *sctp_packet_config(struct sctp_packet *packet, ...@@ -79,6 +79,7 @@ struct sctp_packet *sctp_packet_config(struct sctp_packet *packet,
packet->ecn_capable = ecn_capable; packet->ecn_capable = ecn_capable;
packet->get_prepend_chunk = prepend_handler; packet->get_prepend_chunk = prepend_handler;
packet->has_cookie_echo = 0; packet->has_cookie_echo = 0;
packet->has_sack = 0;
packet->ipfragok = 0; packet->ipfragok = 0;
/* We might need to call the prepend_handler right away. */ /* We might need to call the prepend_handler right away. */
...@@ -100,6 +101,7 @@ struct sctp_packet *sctp_packet_init(struct sctp_packet *packet, ...@@ -100,6 +101,7 @@ struct sctp_packet *sctp_packet_init(struct sctp_packet *packet,
packet->ecn_capable = 0; packet->ecn_capable = 0;
packet->get_prepend_chunk = NULL; packet->get_prepend_chunk = NULL;
packet->has_cookie_echo = 0; packet->has_cookie_echo = 0;
packet->has_sack = 0;
packet->ipfragok = 0; packet->ipfragok = 0;
packet->malloced = 0; packet->malloced = 0;
sctp_packet_reset(packet); sctp_packet_reset(packet);
...@@ -155,6 +157,37 @@ sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *packet, ...@@ -155,6 +157,37 @@ sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *packet,
return retval; return retval;
} }
/* Try to bundle a SACK with the packet. */
static sctp_xmit_t sctp_packet_bundle_sack(struct sctp_packet *pkt,
struct sctp_chunk *chunk)
{
sctp_xmit_t retval = SCTP_XMIT_OK;
/* If sending DATA and haven't aleady bundled a SACK, try to
* bundle one in to the packet.
*/
if (sctp_chunk_is_data(chunk) && !pkt->has_sack &&
!pkt->has_cookie_echo) {
struct sctp_association *asoc;
asoc = pkt->transport->asoc;
if (asoc->a_rwnd > asoc->rwnd) {
struct sctp_chunk *sack;
asoc->a_rwnd = asoc->rwnd;
sack = sctp_make_sack(asoc);
if (sack) {
struct timer_list *timer;
retval = sctp_packet_append_chunk(pkt, sack);
asoc->peer.sack_needed = 0;
timer = &asoc->timers[SCTP_EVENT_TIMEOUT_SACK];
if (timer_pending(timer) && del_timer(timer))
sctp_association_put(asoc);
}
}
}
return retval;
}
/* Append a chunk to the offered packet reporting back any inability to do /* Append a chunk to the offered packet reporting back any inability to do
* so. * so.
*/ */
...@@ -163,10 +196,16 @@ sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *packet, ...@@ -163,10 +196,16 @@ sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *packet,
{ {
sctp_xmit_t retval = SCTP_XMIT_OK; sctp_xmit_t retval = SCTP_XMIT_OK;
__u16 chunk_len = WORD_ROUND(ntohs(chunk->chunk_hdr->length)); __u16 chunk_len = WORD_ROUND(ntohs(chunk->chunk_hdr->length));
size_t psize = packet->size; size_t psize;
size_t pmtu; size_t pmtu;
int too_big; int too_big;
retval = sctp_packet_bundle_sack(packet, chunk);
psize = packet->size;
if (retval != SCTP_XMIT_OK)
goto finish;
pmtu = ((packet->transport->asoc) ? pmtu = ((packet->transport->asoc) ?
(packet->transport->asoc->pmtu) : (packet->transport->asoc->pmtu) :
(packet->transport->pmtu)); (packet->transport->pmtu));
...@@ -214,11 +253,14 @@ sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *packet, ...@@ -214,11 +253,14 @@ sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *packet,
*/ */
if (sctp_chunk_is_data(chunk)) { if (sctp_chunk_is_data(chunk)) {
retval = sctp_packet_append_data(packet, chunk); retval = sctp_packet_append_data(packet, chunk);
/* Disallow SACK bundling after DATA. */
packet->has_sack = 1;
if (SCTP_XMIT_OK != retval) if (SCTP_XMIT_OK != retval)
goto finish; goto finish;
} else if (SCTP_CID_COOKIE_ECHO == chunk->chunk_hdr->type) { } else if (SCTP_CID_COOKIE_ECHO == chunk->chunk_hdr->type)
packet->has_cookie_echo = 1; packet->has_cookie_echo = 1;
} else if (SCTP_CID_SACK == chunk->chunk_hdr->type)
packet->has_sack = 1;
/* It is OK to send this chunk. */ /* It is OK to send this chunk. */
__skb_queue_tail(&packet->chunks, (struct sk_buff *)chunk); __skb_queue_tail(&packet->chunks, (struct sk_buff *)chunk);
......
net/sctp/outqueue.c
View file @ 381a2af8
...@@ -138,13 +138,13 @@ void sctp_outq_init(sctp_association_t *asoc, struct sctp_outq *q) ...@@ -138,13 +138,13 @@ void sctp_outq_init(sctp_association_t *asoc, struct sctp_outq *q)
} }
/* Free the outqueue structure and any related pending chunks. /* Free the outqueue structure and any related pending chunks.
* FIXME: Add SEND_FAILED support.
*/ */
void sctp_outq_teardown(struct sctp_outq *q) void sctp_outq_teardown(struct sctp_outq *q)
{ {
struct sctp_transport *transport; struct sctp_transport *transport;
struct list_head *lchunk, *pos, *temp; struct list_head *lchunk, *pos, *temp;
sctp_chunk_t *chunk; sctp_chunk_t *chunk;
struct sctp_ulpevent *ev;
/* Throw away unacknowledged chunks. */ /* Throw away unacknowledged chunks. */
list_for_each(pos, &q->asoc->peer.transport_addr_list) { list_for_each(pos, &q->asoc->peer.transport_addr_list) {
...@@ -152,6 +152,14 @@ void sctp_outq_teardown(struct sctp_outq *q) ...@@ -152,6 +152,14 @@ void sctp_outq_teardown(struct sctp_outq *q)
while ((lchunk = sctp_list_dequeue(&transport->transmitted))) { while ((lchunk = sctp_list_dequeue(&transport->transmitted))) {
chunk = list_entry(lchunk, sctp_chunk_t, chunk = list_entry(lchunk, sctp_chunk_t,
transmitted_list); transmitted_list);
/* Generate a SEND FAILED event. */
ev = sctp_ulpevent_make_send_failed(q->asoc,
chunk, SCTP_DATA_SENT,
q->error, GFP_ATOMIC);
if (ev)
sctp_ulpq_tail_event(&q->asoc->ulpq, ev);
sctp_free_chunk(chunk); sctp_free_chunk(chunk);
} }
} }
...@@ -171,8 +179,19 @@ void sctp_outq_teardown(struct sctp_outq *q) ...@@ -171,8 +179,19 @@ void sctp_outq_teardown(struct sctp_outq *q)
} }
/* Throw away any leftover data chunks. */ /* Throw away any leftover data chunks. */
while ((chunk = sctp_outq_dequeue_data(q))) while ((chunk = sctp_outq_dequeue_data(q))) {
/* Generate a SEND FAILED event. */
ev = sctp_ulpevent_make_send_failed(q->asoc,
chunk, SCTP_DATA_UNSENT,
q->error, GFP_ATOMIC);
if (ev)
sctp_ulpq_tail_event(&q->asoc->ulpq, ev);
sctp_free_chunk(chunk); sctp_free_chunk(chunk);
}
q->error = 0;
/* Throw away any leftover control chunks. */ /* Throw away any leftover control chunks. */
while ((chunk = (sctp_chunk_t *) skb_dequeue(&q->control))) while ((chunk = (sctp_chunk_t *) skb_dequeue(&q->control)))
...@@ -357,7 +376,7 @@ void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport, ...@@ -357,7 +376,7 @@ void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport,
__u8 fast_retransmit = 0; __u8 fast_retransmit = 0;
switch(reason) { switch(reason) {
case SCTP_RETRANSMIT_T3_RTX: case SCTP_RTXR_T3_RTX:
sctp_transport_lower_cwnd(transport, SCTP_LOWER_CWND_T3_RTX); sctp_transport_lower_cwnd(transport, SCTP_LOWER_CWND_T3_RTX);
/* Update the retran path if the T3-rtx timer has expired for /* Update the retran path if the T3-rtx timer has expired for
* the current retran path. * the current retran path.
...@@ -365,10 +384,11 @@ void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport, ...@@ -365,10 +384,11 @@ void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport,
if (transport == transport->asoc->peer.retran_path) if (transport == transport->asoc->peer.retran_path)
sctp_assoc_update_retran_path(transport->asoc); sctp_assoc_update_retran_path(transport->asoc);
break; break;
case SCTP_RETRANSMIT_FAST_RTX: case SCTP_RTXR_FAST_RTX:
sctp_transport_lower_cwnd(transport, SCTP_LOWER_CWND_FAST_RTX); sctp_transport_lower_cwnd(transport, SCTP_LOWER_CWND_FAST_RTX);
fast_retransmit = 1; fast_retransmit = 1;
break; break;
case SCTP_RTXR_PMTUD:
default: default:
break; break;
} }
...@@ -876,7 +896,7 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout) ...@@ -876,7 +896,7 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
start_timer = 0; start_timer = 0;
queue = &q->out; queue = &q->out;
while (NULL != (chunk = sctp_outq_dequeue_data(q))) { while ((chunk = sctp_outq_dequeue_data(q))) {
/* RFC 2960 6.5 Every DATA chunk MUST carry a valid /* RFC 2960 6.5 Every DATA chunk MUST carry a valid
* stream identifier. * stream identifier.
*/ */
...@@ -891,9 +911,7 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout) ...@@ -891,9 +911,7 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
if (ev) if (ev)
sctp_ulpq_tail_event(&asoc->ulpq, ev); sctp_ulpq_tail_event(&asoc->ulpq, ev);
/* Free the chunk. This chunk is not on any /* Free the chunk. */
* list yet, just free it.
*/
sctp_free_chunk(chunk); sctp_free_chunk(chunk);
continue; continue;
} }
...@@ -1572,7 +1590,7 @@ static void sctp_check_transmitted(struct sctp_outq *q, ...@@ -1572,7 +1590,7 @@ static void sctp_check_transmitted(struct sctp_outq *q,
if (transport) { if (transport) {
if (do_fast_retransmit) if (do_fast_retransmit)
sctp_retransmit(q, transport, SCTP_RETRANSMIT_FAST_RTX); sctp_retransmit(q, transport, SCTP_RTXR_FAST_RTX);
SCTP_DEBUG_PRINTK("%s: transport: %p, cwnd: %d, " SCTP_DEBUG_PRINTK("%s: transport: %p, cwnd: %d, "
"ssthresh: %d, flight_size: %d, pba: %d\n", "ssthresh: %d, flight_size: %d, pba: %d\n",
......
net/sctp/protocol.c
View file @ 381a2af8
...@@ -170,7 +170,7 @@ static void __sctp_get_local_addr_list(struct sctp_protocol *proto) ...@@ -170,7 +170,7 @@ static void __sctp_get_local_addr_list(struct sctp_protocol *proto)
static void sctp_get_local_addr_list(struct sctp_protocol *proto) static void sctp_get_local_addr_list(struct sctp_protocol *proto)
{ {
long flags __attribute__ ((unused)); unsigned long flags;
sctp_spin_lock_irqsave(&sctp_proto.local_addr_lock, flags); sctp_spin_lock_irqsave(&sctp_proto.local_addr_lock, flags);
__sctp_get_local_addr_list(&sctp_proto); __sctp_get_local_addr_list(&sctp_proto);
...@@ -193,7 +193,7 @@ static void __sctp_free_local_addr_list(struct sctp_protocol *proto) ...@@ -193,7 +193,7 @@ static void __sctp_free_local_addr_list(struct sctp_protocol *proto)
/* Free the existing local addresses. */ /* Free the existing local addresses. */
static void sctp_free_local_addr_list(struct sctp_protocol *proto) static void sctp_free_local_addr_list(struct sctp_protocol *proto)
{ {
long flags __attribute__ ((unused)); unsigned long flags;
sctp_spin_lock_irqsave(&proto->local_addr_lock, flags); sctp_spin_lock_irqsave(&proto->local_addr_lock, flags);
__sctp_free_local_addr_list(proto); __sctp_free_local_addr_list(proto);
...@@ -208,7 +208,7 @@ int sctp_copy_local_addr_list(struct sctp_protocol *proto, ...@@ -208,7 +208,7 @@ int sctp_copy_local_addr_list(struct sctp_protocol *proto,
struct sockaddr_storage_list *addr; struct sockaddr_storage_list *addr;
int error = 0; int error = 0;
struct list_head *pos; struct list_head *pos;
long flags __attribute__ ((unused)); unsigned long flags;
sctp_spin_lock_irqsave(&proto->local_addr_lock, flags); sctp_spin_lock_irqsave(&proto->local_addr_lock, flags);
list_for_each(pos, &proto->local_addr_list) { list_for_each(pos, &proto->local_addr_list) {
...@@ -233,7 +233,6 @@ int sctp_copy_local_addr_list(struct sctp_protocol *proto, ...@@ -233,7 +233,6 @@ int sctp_copy_local_addr_list(struct sctp_protocol *proto,
end_copy: end_copy:
sctp_spin_unlock_irqrestore(&proto->local_addr_lock, flags); sctp_spin_unlock_irqrestore(&proto->local_addr_lock, flags);
return error; return error;
} }
...@@ -383,7 +382,7 @@ static sctp_scope_t sctp_v4_scope(union sctp_addr *addr) ...@@ -383,7 +382,7 @@ static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
* addresses. If an association is passed, trys to get a dst entry with a * addresses. If an association is passed, trys to get a dst entry with a
* source adddress that matches an address in the bind address list. * source adddress that matches an address in the bind address list.
*/ */
struct dst_entry *sctp_v4_get_dst(sctp_association_t *asoc, struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
union sctp_addr *daddr, union sctp_addr *daddr,
union sctp_addr *saddr) union sctp_addr *saddr)
{ {
...@@ -480,6 +479,12 @@ void sctp_v4_get_saddr(sctp_association_t *asoc, ...@@ -480,6 +479,12 @@ void sctp_v4_get_saddr(sctp_association_t *asoc,
} }
/* What interface did this skb arrive on? */
int sctp_v4_skb_iif(const struct sk_buff *skb)
{
return ((struct rtable *)skb->dst)->rt_iif;
}
/* Create and initialize a new sk for the socket returned by accept(). */ /* Create and initialize a new sk for the socket returned by accept(). */
struct sock *sctp_v4_create_accept_sk(struct sock *sk, struct sock *sctp_v4_create_accept_sk(struct sock *sk,
struct sctp_association *asoc) struct sctp_association *asoc)
...@@ -538,10 +543,10 @@ struct sock *sctp_v4_create_accept_sk(struct sock *sk, ...@@ -538,10 +543,10 @@ struct sock *sctp_v4_create_accept_sk(struct sock *sk,
/* Event handler for inet address addition/deletion events. /* Event handler for inet address addition/deletion events.
* Basically, whenever there is an event, we re-build our local address list. * Basically, whenever there is an event, we re-build our local address list.
*/ */
static int sctp_inetaddr_event(struct notifier_block *this, unsigned long event, static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
void *ptr) void *ptr)
{ {
long flags __attribute__ ((unused)); unsigned long flags;
sctp_spin_lock_irqsave(&sctp_proto.local_addr_lock, flags); sctp_spin_lock_irqsave(&sctp_proto.local_addr_lock, flags);
__sctp_free_local_addr_list(&sctp_proto); __sctp_free_local_addr_list(&sctp_proto);
...@@ -689,6 +694,14 @@ static int sctp_inet_bind_verify(struct sctp_opt *opt, union sctp_addr *addr) ...@@ -689,6 +694,14 @@ static int sctp_inet_bind_verify(struct sctp_opt *opt, union sctp_addr *addr)
return sctp_v4_available(addr); return sctp_v4_available(addr);
} }
/* Verify that sockaddr looks sendable. Common verification has already
* been taken care of.
*/
static int sctp_inet_send_verify(struct sctp_opt *opt, union sctp_addr *addr)
{
return 1;
}
/* Fill in Supported Address Type information for INIT and INIT-ACK /* Fill in Supported Address Type information for INIT and INIT-ACK
* chunks. Returns number of addresses supported. * chunks. Returns number of addresses supported.
*/ */
...@@ -721,6 +734,7 @@ static struct sctp_pf sctp_pf_inet = { ...@@ -721,6 +734,7 @@ static struct sctp_pf sctp_pf_inet = {
.af_supported = sctp_inet_af_supported, .af_supported = sctp_inet_af_supported,
.cmp_addr = sctp_inet_cmp_addr, .cmp_addr = sctp_inet_cmp_addr,
.bind_verify = sctp_inet_bind_verify, .bind_verify = sctp_inet_bind_verify,
.send_verify = sctp_inet_send_verify,
.supported_addrs = sctp_inet_supported_addrs, .supported_addrs = sctp_inet_supported_addrs,
.create_accept_sk = sctp_v4_create_accept_sk, .create_accept_sk = sctp_v4_create_accept_sk,
.af = &sctp_ipv4_specific, .af = &sctp_ipv4_specific,
...@@ -797,6 +811,7 @@ struct sctp_af sctp_ipv4_specific = { ...@@ -797,6 +811,7 @@ struct sctp_af sctp_ipv4_specific = {
.is_any = sctp_v4_is_any, .is_any = sctp_v4_is_any,
.available = sctp_v4_available, .available = sctp_v4_available,
.scope = sctp_v4_scope, .scope = sctp_v4_scope,
.skb_iif = sctp_v4_skb_iif,
.net_header_len = sizeof(struct iphdr), .net_header_len = sizeof(struct iphdr),
.sockaddr_len = sizeof(struct sockaddr_in), .sockaddr_len = sizeof(struct sockaddr_in),
.sa_family = AF_INET, .sa_family = AF_INET,
...@@ -874,6 +889,10 @@ __init int sctp_init(void) ...@@ -874,6 +889,10 @@ __init int sctp_init(void)
int i; int i;
int status = 0; int status = 0;
/* SCTP_DEBUG sanity check. */
if (!sctp_sanity_check())
return -EINVAL;
/* Add SCTP to inet_protos hash table. */ /* Add SCTP to inet_protos hash table. */
if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
return -EAGAIN; return -EAGAIN;
......
net/sctp/sm_make_chunk.c
View file @ 381a2af8
...@@ -66,6 +66,19 @@ ...@@ -66,6 +66,19 @@
#include <net/sctp/sctp.h> #include <net/sctp/sctp.h>
#include <net/sctp/sm.h> #include <net/sctp/sm.h>
/* What was the inbound interface for this chunk? */
int sctp_chunk_iif(const struct sctp_chunk *chunk)
{
struct sctp_af *af;
int iif = 0;
af = sctp_get_af_specific(ipver2af(chunk->skb->nh.iph->version));
if (af)
iif = af->skb_iif(chunk->skb);
return iif;
}
/* RFC 2960 3.3.2 Initiation (INIT) (1) /* RFC 2960 3.3.2 Initiation (INIT) (1)
* *
* Note 2: The ECN capable field is reserved for future use of * Note 2: The ECN capable field is reserved for future use of
...@@ -145,7 +158,7 @@ void sctp_init_cause(sctp_chunk_t *chunk, __u16 cause_code, ...@@ -145,7 +158,7 @@ void sctp_init_cause(sctp_chunk_t *chunk, __u16 cause_code,
*/ */
sctp_chunk_t *sctp_make_init(const sctp_association_t *asoc, sctp_chunk_t *sctp_make_init(const sctp_association_t *asoc,
const sctp_bind_addr_t *bp, const sctp_bind_addr_t *bp,
int priority, int vparam_len) int gfp, int vparam_len)
{ {
sctp_inithdr_t init; sctp_inithdr_t init;
union sctp_params addrs; union sctp_params addrs;
...@@ -165,7 +178,7 @@ sctp_chunk_t *sctp_make_init(const sctp_association_t *asoc, ...@@ -165,7 +178,7 @@ sctp_chunk_t *sctp_make_init(const sctp_association_t *asoc,
addrs.v = NULL; addrs.v = NULL;
/* Convert the provided bind address list to raw format */ /* Convert the provided bind address list to raw format */
addrs = sctp_bind_addrs_to_raw(bp, &addrs_len, priority); addrs = sctp_bind_addrs_to_raw(bp, &addrs_len, gfp);
if (!addrs.v) if (!addrs.v)
goto nodata; goto nodata;
...@@ -225,7 +238,7 @@ sctp_chunk_t *sctp_make_init(const sctp_association_t *asoc, ...@@ -225,7 +238,7 @@ sctp_chunk_t *sctp_make_init(const sctp_association_t *asoc,
sctp_chunk_t *sctp_make_init_ack(const sctp_association_t *asoc, sctp_chunk_t *sctp_make_init_ack(const sctp_association_t *asoc,
const sctp_chunk_t *chunk, const sctp_chunk_t *chunk,
int priority, int unkparam_len) int gfp, int unkparam_len)
{ {
sctp_inithdr_t initack; sctp_inithdr_t initack;
sctp_chunk_t *retval; sctp_chunk_t *retval;
...@@ -237,8 +250,7 @@ sctp_chunk_t *sctp_make_init_ack(const sctp_association_t *asoc, ...@@ -237,8 +250,7 @@ sctp_chunk_t *sctp_make_init_ack(const sctp_association_t *asoc,
retval = NULL; retval = NULL;
addrs = sctp_bind_addrs_to_raw(&asoc->base.bind_addr, &addrs_len, addrs = sctp_bind_addrs_to_raw(&asoc->base.bind_addr, &addrs_len, gfp);
priority);
if (!addrs.v) if (!addrs.v)
goto nomem_rawaddr; goto nomem_rawaddr;
...@@ -1019,21 +1031,18 @@ sctp_chunk_t *sctp_make_chunk(const sctp_association_t *asoc, ...@@ -1019,21 +1031,18 @@ sctp_chunk_t *sctp_make_chunk(const sctp_association_t *asoc,
struct sk_buff *skb; struct sk_buff *skb;
struct sock *sk; struct sock *sk;
skb = dev_alloc_skb(WORD_ROUND(sizeof(sctp_chunkhdr_t) + paylen)); /* No need to allocate LL here, as this is only a chunk. */
skb = alloc_skb(WORD_ROUND(sizeof(sctp_chunkhdr_t) + paylen),
GFP_ATOMIC);
if (!skb) if (!skb)
goto nodata; goto nodata;
/* Make room for the chunk header. */ /* Make room for the chunk header. */
chunk_hdr = (sctp_chunkhdr_t *)skb_put(skb, sizeof(sctp_chunkhdr_t)); chunk_hdr = (sctp_chunkhdr_t *)skb_put(skb, sizeof(sctp_chunkhdr_t));
skb_pull(skb, sizeof(sctp_chunkhdr_t));
chunk_hdr->type = type; chunk_hdr->type = type;
chunk_hdr->flags = flags; chunk_hdr->flags = flags;
chunk_hdr->length = htons(sizeof(sctp_chunkhdr_t)); chunk_hdr->length = htons(sizeof(sctp_chunkhdr_t));
/* Move the data pointer back up to the start of the chunk. */
skb_push(skb, sizeof(sctp_chunkhdr_t));
sk = asoc ? asoc->base.sk : NULL; sk = asoc ? asoc->base.sk : NULL;
retval = sctp_chunkify(skb, asoc, sk); retval = sctp_chunkify(skb, asoc, sk);
if (!retval) { if (!retval) {
...@@ -1282,26 +1291,26 @@ void sctp_chunk_assign_tsn(sctp_chunk_t *chunk) ...@@ -1282,26 +1291,26 @@ void sctp_chunk_assign_tsn(sctp_chunk_t *chunk)
} }
/* Create a CLOSED association to use with an incoming packet. */ /* Create a CLOSED association to use with an incoming packet. */
sctp_association_t *sctp_make_temp_asoc(const sctp_endpoint_t *ep, sctp_association_t *sctp_make_temp_asoc(const struct sctp_endpoint *ep,
sctp_chunk_t *chunk, struct sctp_chunk *chunk, int gfp)
int priority)
{ {
sctp_association_t *asoc; sctp_association_t *asoc;
struct sk_buff *skb;
sctp_scope_t scope; sctp_scope_t scope;
/* Create the bare association. */ /* Create the bare association. */
scope = sctp_scope(sctp_source(chunk)); scope = sctp_scope(sctp_source(chunk));
asoc = sctp_association_new(ep, ep->base.sk, scope, priority); asoc = sctp_association_new(ep, ep->base.sk, scope, gfp);
if (!asoc) if (!asoc)
goto nodata; goto nodata;
skb = chunk->skb;
/* Create an entry for the source address of the packet. */ /* Create an entry for the source address of the packet. */
switch (chunk->skb->nh.iph->version) { /* FIXME: Use the af specific helpers. */
switch (skb->nh.iph->version) {
case 4: case 4:
asoc->c.peer_addr.v4.sin_family = AF_INET; asoc->c.peer_addr.v4.sin_family = AF_INET;
asoc->c.peer_addr.v4.sin_port = ntohs(chunk->sctp_hdr->source); asoc->c.peer_addr.v4.sin_port = ntohs(chunk->sctp_hdr->source);
asoc->c.peer_addr.v4.sin_addr.s_addr = asoc->c.peer_addr.v4.sin_addr.s_addr = skb->nh.iph->saddr;
chunk->skb->nh.iph->saddr;
break; break;
case 6: case 6:
...@@ -1309,8 +1318,9 @@ sctp_association_t *sctp_make_temp_asoc(const sctp_endpoint_t *ep, ...@@ -1309,8 +1318,9 @@ sctp_association_t *sctp_make_temp_asoc(const sctp_endpoint_t *ep,
asoc->c.peer_addr.v6.sin6_port asoc->c.peer_addr.v6.sin6_port
= ntohs(chunk->sctp_hdr->source); = ntohs(chunk->sctp_hdr->source);
asoc->c.peer_addr.v6.sin6_flowinfo = 0; /* BUG BUG BUG */ asoc->c.peer_addr.v6.sin6_flowinfo = 0; /* BUG BUG BUG */
asoc->c.peer_addr.v6.sin6_addr = chunk->skb->nh.ipv6h->saddr; asoc->c.peer_addr.v6.sin6_addr = skb->nh.ipv6h->saddr;
asoc->c.peer_addr.v6.sin6_scope_id = 0; /* BUG BUG BUG */ asoc->c.peer_addr.v6.sin6_scope_id =
((struct inet6_skb_parm *)skb->cb)->iif;
break; break;
default: default:
...@@ -1397,7 +1407,7 @@ sctp_cookie_param_t *sctp_pack_cookie(const sctp_endpoint_t *ep, ...@@ -1397,7 +1407,7 @@ sctp_cookie_param_t *sctp_pack_cookie(const sctp_endpoint_t *ep,
/* Unpack the cookie from COOKIE ECHO chunk, recreating the association. */ /* Unpack the cookie from COOKIE ECHO chunk, recreating the association. */
sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep, sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep,
const sctp_association_t *asoc, const sctp_association_t *asoc,
sctp_chunk_t *chunk, int priority, sctp_chunk_t *chunk, int gfp,
int *error, sctp_chunk_t **err_chk_p) int *error, sctp_chunk_t **err_chk_p)
{ {
sctp_association_t *retval = NULL; sctp_association_t *retval = NULL;
...@@ -1408,6 +1418,7 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep, ...@@ -1408,6 +1418,7 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep,
__u8 digest_buf[SCTP_SIGNATURE_SIZE]; __u8 digest_buf[SCTP_SIGNATURE_SIZE];
int secret; int secret;
sctp_scope_t scope; sctp_scope_t scope;
struct sk_buff *skb = chunk->skb;
headersize = sizeof(sctp_chunkhdr_t) + SCTP_SECRET_SIZE; headersize = sizeof(sctp_chunkhdr_t) + SCTP_SECRET_SIZE;
bodysize = ntohs(chunk->chunk_hdr->length) - headersize; bodysize = ntohs(chunk->chunk_hdr->length) - headersize;
...@@ -1450,7 +1461,7 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep, ...@@ -1450,7 +1461,7 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep,
* an association, there is no need to check cookie's expiration * an association, there is no need to check cookie's expiration
* for init collision case of lost COOKIE ACK. * for init collision case of lost COOKIE ACK.
*/ */
if (!asoc && tv_lt(bear_cookie->expiration, chunk->skb->stamp)) { if (!asoc && tv_lt(bear_cookie->expiration, skb->stamp)) {
__u16 len; __u16 len;
/* /*
* Section 3.3.10.3 Stale Cookie Error (3) * Section 3.3.10.3 Stale Cookie Error (3)
...@@ -1463,9 +1474,9 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep, ...@@ -1463,9 +1474,9 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep,
len = ntohs(chunk->chunk_hdr->length); len = ntohs(chunk->chunk_hdr->length);
*err_chk_p = sctp_make_op_error_space(asoc, chunk, len); *err_chk_p = sctp_make_op_error_space(asoc, chunk, len);
if (*err_chk_p) { if (*err_chk_p) {
suseconds_t usecs = (chunk->skb->stamp.tv_sec - suseconds_t usecs = (skb->stamp.tv_sec -
bear_cookie->expiration.tv_sec) * 1000000L + bear_cookie->expiration.tv_sec) * 1000000L +
chunk->skb->stamp.tv_usec - skb->stamp.tv_usec -
bear_cookie->expiration.tv_usec; bear_cookie->expiration.tv_usec;
usecs = htonl(usecs); usecs = htonl(usecs);
...@@ -1480,7 +1491,7 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep, ...@@ -1480,7 +1491,7 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep,
/* Make a new base association. */ /* Make a new base association. */
scope = sctp_scope(sctp_source(chunk)); scope = sctp_scope(sctp_source(chunk));
retval = sctp_association_new(ep, ep->base.sk, scope, priority); retval = sctp_association_new(ep, ep->base.sk, scope, gfp);
if (!retval) { if (!retval) {
*error = -SCTP_IERROR_NOMEM; *error = -SCTP_IERROR_NOMEM;
goto fail; goto fail;
...@@ -1522,13 +1533,14 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep, ...@@ -1522,13 +1533,14 @@ sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *ep,
* 3rd Level Abstractions * 3rd Level Abstractions
********************************************************************/ ********************************************************************/
/*
* Report a missing mandatory parameter.
*/
struct __sctp_missing { struct __sctp_missing {
__u32 num_missing; __u32 num_missing;
__u16 type; __u16 type;
} __attribute__((packed));; } __attribute__((packed));;
/*
* Report a missing mandatory parameter.
*/
static int sctp_process_missing_param(const sctp_association_t *asoc, static int sctp_process_missing_param(const sctp_association_t *asoc,
sctp_param_t paramtype, sctp_param_t paramtype,
sctp_chunk_t *chunk, sctp_chunk_t *chunk,
...@@ -1774,8 +1786,7 @@ int sctp_verify_init(const sctp_association_t *asoc, ...@@ -1774,8 +1786,7 @@ int sctp_verify_init(const sctp_association_t *asoc,
*/ */
int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid, int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
const union sctp_addr *peer_addr, const union sctp_addr *peer_addr,
sctp_init_chunk_t *peer_init, sctp_init_chunk_t *peer_init, int gfp)
int priority)
{ {
union sctp_params param; union sctp_params param;
struct sctp_transport *transport; struct sctp_transport *transport;
...@@ -1793,14 +1804,14 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid, ...@@ -1793,14 +1804,14 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
* be a a better choice than any of the embedded addresses. * be a a better choice than any of the embedded addresses.
*/ */
if (peer_addr) if (peer_addr)
if(!sctp_assoc_add_peer(asoc, peer_addr, priority)) if(!sctp_assoc_add_peer(asoc, peer_addr, gfp))
goto nomem; goto nomem;
/* Process the initialization parameters. */ /* Process the initialization parameters. */
sctp_walk_params(param, peer_init, init_hdr.params) { sctp_walk_params(param, peer_init, init_hdr.params) {
if (!sctp_process_param(asoc, param, peer_addr, priority)) if (!sctp_process_param(asoc, param, peer_addr, gfp))
goto clean_up; goto clean_up;
} }
...@@ -1842,7 +1853,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid, ...@@ -1842,7 +1853,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
/* Copy cookie in case we need to resend COOKIE-ECHO. */ /* Copy cookie in case we need to resend COOKIE-ECHO. */
cookie = asoc->peer.cookie; cookie = asoc->peer.cookie;
if (cookie) { if (cookie) {
asoc->peer.cookie = kmalloc(asoc->peer.cookie_len, priority); asoc->peer.cookie = kmalloc(asoc->peer.cookie_len, gfp);
if (!asoc->peer.cookie) if (!asoc->peer.cookie)
goto clean_up; goto clean_up;
memcpy(asoc->peer.cookie, cookie, asoc->peer.cookie_len); memcpy(asoc->peer.cookie, cookie, asoc->peer.cookie_len);
...@@ -1871,8 +1882,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid, ...@@ -1871,8 +1882,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
/* Allocate storage for the negotiated streams. */ /* Allocate storage for the negotiated streams. */
asoc->ssnmap = sctp_ssnmap_new(asoc->peer.i.num_outbound_streams, asoc->ssnmap = sctp_ssnmap_new(asoc->peer.i.num_outbound_streams,
asoc->c.sinit_num_ostreams, asoc->c.sinit_num_ostreams, gfp);
priority);
if (!asoc->ssnmap) if (!asoc->ssnmap)
goto nomem_ssnmap; goto nomem_ssnmap;
...@@ -1914,7 +1924,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid, ...@@ -1914,7 +1924,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
* structures for the addresses. * structures for the addresses.
*/ */
int sctp_process_param(sctp_association_t *asoc, union sctp_params param, int sctp_process_param(sctp_association_t *asoc, union sctp_params param,
const union sctp_addr *peer_addr, int priority) const union sctp_addr *peer_addr, int gfp)
{ {
union sctp_addr addr; union sctp_addr addr;
int i; int i;
...@@ -1933,10 +1943,10 @@ int sctp_process_param(sctp_association_t *asoc, union sctp_params param, ...@@ -1933,10 +1943,10 @@ int sctp_process_param(sctp_association_t *asoc, union sctp_params param,
break; break;
/* Fall through. */ /* Fall through. */
case SCTP_PARAM_IPV4_ADDRESS: case SCTP_PARAM_IPV4_ADDRESS:
sctp_param2sockaddr(&addr, param.addr, asoc->peer.port); sctp_param2sockaddr(&addr, param.addr, asoc->peer.port, 0);
scope = sctp_scope(peer_addr); scope = sctp_scope(peer_addr);
if (sctp_in_scope(&addr, scope)) if (sctp_in_scope(&addr, scope))
if (!sctp_assoc_add_peer(asoc, &addr, priority)) if (!sctp_assoc_add_peer(asoc, &addr, gfp))
return 0; return 0;
break; break;
...@@ -2051,7 +2061,7 @@ __u32 sctp_generate_tsn(const sctp_endpoint_t *ep) ...@@ -2051,7 +2061,7 @@ __u32 sctp_generate_tsn(const sctp_endpoint_t *ep)
/* Convert from an SCTP IP parameter to a union sctp_addr. */ /* Convert from an SCTP IP parameter to a union sctp_addr. */
void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *param, void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *param,
__u16 port) __u16 port, int iif)
{ {
switch(param->v4.param_hdr.type) { switch(param->v4.param_hdr.type) {
case SCTP_PARAM_IPV4_ADDRESS: case SCTP_PARAM_IPV4_ADDRESS:
...@@ -2065,7 +2075,7 @@ void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *param, ...@@ -2065,7 +2075,7 @@ void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *param,
addr->v6.sin6_port = port; addr->v6.sin6_port = port;
addr->v6.sin6_flowinfo = 0; /* BUG */ addr->v6.sin6_flowinfo = 0; /* BUG */
addr->v6.sin6_addr = param->v6.addr; addr->v6.sin6_addr = param->v6.addr;
addr->v6.sin6_scope_id = 0; /* BUG */ addr->v6.sin6_scope_id = iif;
break; break;
default: default:
......
net/sctp/sm_sideeffect.c
View file @ 381a2af8
...@@ -55,1202 +55,1106 @@ ...@@ -55,1202 +55,1106 @@
#include <net/sctp/sctp.h> #include <net/sctp/sctp.h>
#include <net/sctp/sm.h> #include <net/sctp/sm.h>
/* Do forward declarations of static functions. */ /********************************************************************
static void sctp_do_ecn_ce_work(sctp_association_t *,__u32 lowest_tsn); * Helper functions
static sctp_chunk_t *sctp_do_ecn_ecne_work(sctp_association_t *asoc, ********************************************************************/
__u32 lowest_tsn,
sctp_chunk_t *);
static void sctp_do_ecn_cwr_work(sctp_association_t *,__u32 lowest_tsn);
static void sctp_do_8_2_transport_strike(sctp_association_t *,
struct sctp_transport *);
static void sctp_cmd_init_failed(sctp_cmd_seq_t *, sctp_association_t *);
static void sctp_cmd_assoc_failed(sctp_cmd_seq_t *, sctp_association_t *,
sctp_event_t, sctp_subtype_t,
sctp_chunk_t *chunk);
static int sctp_cmd_process_init(sctp_cmd_seq_t *, sctp_association_t *,
sctp_chunk_t *chunk,
sctp_init_chunk_t *peer_init,
int priority);
static void sctp_cmd_hb_timers_start(sctp_cmd_seq_t *, sctp_association_t *);
static void sctp_cmd_hb_timers_stop(sctp_cmd_seq_t *, sctp_association_t *);
static void sctp_cmd_hb_timer_update(sctp_cmd_seq_t *, sctp_association_t *,
struct sctp_transport *);
static void sctp_cmd_transport_reset(sctp_cmd_seq_t *, sctp_association_t *,
struct sctp_transport *);
static void sctp_cmd_transport_on(sctp_cmd_seq_t *, sctp_association_t *,
struct sctp_transport *, sctp_chunk_t *);
static int sctp_cmd_process_sack(sctp_cmd_seq_t *, sctp_association_t *,
sctp_sackhdr_t *);
static void sctp_cmd_setup_t2(sctp_cmd_seq_t *, sctp_association_t *,
sctp_chunk_t *);
static void sctp_cmd_new_state(sctp_cmd_seq_t *, sctp_association_t *,
sctp_state_t);
/* These three macros allow us to pull the debugging code out of the
* main flow of sctp_do_sm() to keep attention focused on the real
* functionality there.
*/
#define DEBUG_PRE \
SCTP_DEBUG_PRINTK("sctp_do_sm prefn: " \
"ep %p, %s, %s, asoc %p[%s], %s\n", \
ep, sctp_evttype_tbl[event_type], \
(*debug_fn)(subtype), asoc, \
sctp_state_tbl[state], state_fn->name)
#define DEBUG_POST \ /* A helper function for delayed processing of INET ECN CE bit. */
SCTP_DEBUG_PRINTK("sctp_do_sm postfn: " \ static void sctp_do_ecn_ce_work(sctp_association_t *asoc, __u32 lowest_tsn)
"asoc %p, status: %s\n", \ {
asoc, sctp_status_tbl[status]) /* Save the TSN away for comparison when we receive CWR */
#define DEBUG_POST_SFX \ asoc->last_ecne_tsn = lowest_tsn;
SCTP_DEBUG_PRINTK("sctp_do_sm post sfx: error %d, asoc %p[%s]\n", \ asoc->need_ecne = 1;
error, asoc, \ }
sctp_state_tbl[(asoc && sctp_id2assoc(ep->base.sk, \
sctp_assoc2id(asoc)))?asoc->state:SCTP_STATE_CLOSED])
/* /* Helper function for delayed processing of SCTP ECNE chunk. */
* This is the master state machine processing function. /* RFC 2960 Appendix A
* *
* If you want to understand all of lksctp, this is a * RFC 2481 details a specific bit for a sender to send in
* good place to start. * the header of its next outbound TCP segment to indicate to
* its peer that it has reduced its congestion window. This
* is termed the CWR bit. For SCTP the same indication is made
* by including the CWR chunk. This chunk contains one data
* element, i.e. the TSN number that was sent in the ECNE chunk.
* This element represents the lowest TSN number in the datagram
* that was originally marked with the CE bit.
*/ */
int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype, static sctp_chunk_t *sctp_do_ecn_ecne_work(sctp_association_t *asoc,
sctp_state_t state, __u32 lowest_tsn,
sctp_endpoint_t *ep, sctp_chunk_t *chunk)
sctp_association_t *asoc,
void *event_arg,
int priority)
{ {
sctp_cmd_seq_t commands; sctp_chunk_t *repl;
sctp_sm_table_entry_t *state_fn;
sctp_disposition_t status;
int error = 0;
typedef const char *(printfn_t)(sctp_subtype_t);
static printfn_t *table[] = { /* Our previously transmitted packet ran into some congestion
NULL, sctp_cname, sctp_tname, sctp_oname, sctp_pname, * so we should take action by reducing cwnd and ssthresh
}; * and then ACK our peer that we we've done so by
printfn_t *debug_fn __attribute__ ((unused)) = table[event_type]; * sending a CWR.
*/
/* Look up the state function, run it, and then process the /* First, try to determine if we want to actually lower
* side effects. These three steps are the heart of lksctp. * our cwnd variables. Only lower them if the ECNE looks more
* recent than the last response.
*/ */
state_fn = sctp_sm_lookup_event(event_type, state, subtype); if (TSN_lt(asoc->last_cwr_tsn, lowest_tsn)) {
struct sctp_transport *transport;
sctp_init_cmd_seq(&commands); /* Find which transport's congestion variables
* need to be adjusted.
*/
transport = sctp_assoc_lookup_tsn(asoc, lowest_tsn);
DEBUG_PRE; /* Update the congestion variables. */
status = (*state_fn->fn)(ep, asoc, subtype, event_arg, &commands); if (transport)
DEBUG_POST; sctp_transport_lower_cwnd(transport,
SCTP_LOWER_CWND_ECNE);
asoc->last_cwr_tsn = lowest_tsn;
}
error = sctp_side_effects(event_type, subtype, state, /* Always try to quiet the other end. In case of lost CWR,
ep, asoc, event_arg, * resend last_cwr_tsn.
status, &commands, */
priority); repl = sctp_make_cwr(asoc, asoc->last_cwr_tsn, chunk);
DEBUG_POST_SFX;
return error; /* If we run out of memory, it will look like a lost CWR. We'll
* get back in sync eventually.
*/
return repl;
} }
#undef DEBUG_PRE /* Helper function to do delayed processing of ECN CWR chunk. */
#undef DEBUG_POST static void sctp_do_ecn_cwr_work(sctp_association_t *asoc,
__u32 lowest_tsn)
/*****************************************************************
* This the master state function side effect processing function.
*****************************************************************/
int sctp_side_effects(sctp_event_t event_type, sctp_subtype_t subtype,
sctp_state_t state,
sctp_endpoint_t *ep,
sctp_association_t *asoc,
void *event_arg,
sctp_disposition_t status,
sctp_cmd_seq_t *commands,
int priority)
{ {
int error; /* Turn off ECNE getting auto-prepended to every outgoing
* packet
/* FIXME - Most of the dispositions left today would be categorized
* as "exceptional" dispositions. For those dispositions, it
* may not be proper to run through any of the commands at all.
* For example, the command interpreter might be run only with
* disposition SCTP_DISPOSITION_CONSUME.
*/ */
if (0 != (error = sctp_cmd_interpreter(event_type, subtype, state, asoc->need_ecne = 0;
ep, asoc, }
event_arg, status,
commands, priority)))
goto bail;
switch (status) { /* Generate SACK if necessary. We call this at the end of a packet. */
case SCTP_DISPOSITION_DISCARD: int sctp_gen_sack(struct sctp_association *asoc, int force,
SCTP_DEBUG_PRINTK("Ignored sctp protocol event - state %d, " sctp_cmd_seq_t *commands)
"event_type %d, event_id %d\n", {
state, event_type, subtype.chunk); __u32 ctsn, max_tsn_seen;
break; struct sctp_chunk *sack;
int error = 0;
case SCTP_DISPOSITION_NOMEM: if (force)
/* We ran out of memory, so we need to discard this asoc->peer.sack_needed = 1;
* packet.
*/
/* BUG--we should now recover some memory, probably by
* reneging...
*/
error = -ENOMEM;
break;
case SCTP_DISPOSITION_DELETE_TCB: ctsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map);
/* This should now be a command. */ max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map);
break;
case SCTP_DISPOSITION_CONSUME: /* From 12.2 Parameters necessary per association (i.e. the TCB):
case SCTP_DISPOSITION_ABORT: *
/* * Ack State : This flag indicates if the next received packet
* We should no longer have much work to do here as the * : is to be responded to with a SACK. ...
* real work has been done as explicit commands above. * : When DATA chunks are out of order, SACK's
* : are not delayed (see Section 6).
*
* [This is actually not mentioned in Section 6, but we
* implement it here anyway. --piggy]
*/ */
break; if (max_tsn_seen != ctsn)
asoc->peer.sack_needed = 1;
case SCTP_DISPOSITION_VIOLATION:
printk(KERN_ERR "sctp protocol violation state %d "
"chunkid %d\n", state, subtype.chunk);
break;
case SCTP_DISPOSITION_NOT_IMPL: /* From 6.2 Acknowledgement on Reception of DATA Chunks:
printk(KERN_WARNING "sctp unimplemented feature in state %d, " *
"event_type %d, event_id %d\n", * Section 4.2 of [RFC2581] SHOULD be followed. Specifically,
state, event_type, subtype.chunk); * an acknowledgement SHOULD be generated for at least every
break; * second packet (not every second DATA chunk) received, and
* SHOULD be generated within 200 ms of the arrival of any
* unacknowledged DATA chunk. ...
*/
if (!asoc->peer.sack_needed) {
/* We will need a SACK for the next packet. */
asoc->peer.sack_needed = 1;
goto out;
} else {
if (asoc->a_rwnd > asoc->rwnd)
asoc->a_rwnd = asoc->rwnd;
sack = sctp_make_sack(asoc);
if (!sack)
goto nomem;
case SCTP_DISPOSITION_BUG: asoc->peer.sack_needed = 0;
printk(KERN_ERR "sctp bug in state %d, "
"event_type %d, event_id %d\n",
state, event_type, subtype.chunk);
BUG();
break;
default: error = sctp_outq_tail(&asoc->outqueue, sack);
printk(KERN_ERR "sctp impossible disposition %d "
"in state %d, event_type %d, event_id %d\n",
status, state, event_type, subtype.chunk);
BUG();
break;
};
bail: /* Stop the SACK timer. */
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK));
}
out:
return error;
nomem:
error = -ENOMEM;
return error; return error;
} }
/******************************************************************** /* When the T3-RTX timer expires, it calls this function to create the
* 2nd Level Abstractions * relevant state machine event.
********************************************************************/ */
void sctp_generate_t3_rtx_event(unsigned long peer)
/* This is the side-effect interpreter. */
int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
sctp_state_t state, sctp_endpoint_t *ep,
sctp_association_t *asoc, void *event_arg,
sctp_disposition_t status, sctp_cmd_seq_t *commands,
int priority)
{ {
int error = 0; int error;
int force; struct sctp_transport *transport = (struct sctp_transport *) peer;
sctp_cmd_t *cmd; sctp_association_t *asoc = transport->asoc;
sctp_chunk_t *new_obj;
sctp_chunk_t *chunk = NULL;
struct sctp_packet *packet;
struct list_head *pos;
struct timer_list *timer;
unsigned long timeout;
struct sctp_transport *t;
sctp_sackhdr_t sackh;
if(SCTP_EVENT_T_TIMEOUT != event_type)
chunk = (sctp_chunk_t *) event_arg;
/* Note: This whole file is a huge candidate for rework.
* For example, each command could either have its own handler, so
* the loop would look like:
* while (cmds)
* cmd->handle(x, y, z)
* --jgrimm
*/
while (NULL != (cmd = sctp_next_cmd(commands))) {
switch (cmd->verb) {
case SCTP_CMD_NOP:
/* Do nothing. */
break;
case SCTP_CMD_NEW_ASOC:
/* Register a new association. */
asoc = cmd->obj.ptr;
/* Register with the endpoint. */
sctp_endpoint_add_asoc(ep, asoc);
sctp_hash_established(asoc);
break;
case SCTP_CMD_UPDATE_ASSOC:
sctp_assoc_update(asoc, cmd->obj.ptr);
break;
case SCTP_CMD_PURGE_OUTQUEUE:
sctp_outq_teardown(&asoc->outqueue);
break;
case SCTP_CMD_DELETE_TCB: /* Check whether a task is in the sock. */
/* Delete the current association. */
sctp_unhash_established(asoc);
sctp_association_free(asoc);
asoc = NULL;
break;
case SCTP_CMD_NEW_STATE: sctp_bh_lock_sock(asoc->base.sk);
/* Enter a new state. */ if (sock_owned_by_user(asoc->base.sk)) {
sctp_cmd_new_state(commands, asoc, cmd->obj.state); SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __FUNCTION__);
break;
case SCTP_CMD_REPORT_TSN: /* Try again later. */
/* Record the arrival of a TSN. */ if (!mod_timer(&transport->T3_rtx_timer, jiffies + (HZ/20)))
sctp_tsnmap_mark(&asoc->peer.tsn_map, cmd->obj.u32); sctp_transport_hold(transport);
break; goto out_unlock;
}
case SCTP_CMD_GEN_SACK: /* Is this transport really dead and just waiting around for
/* Generate a Selective ACK. * the timer to let go of the reference?
* The argument tells us whether to just count
* the packet and MAYBE generate a SACK, or
* force a SACK out.
*/ */
force = cmd->obj.i32; if (transport->dead)
error = sctp_gen_sack(asoc, force, commands); goto out_unlock;
break;
case SCTP_CMD_PROCESS_SACK: /* Run through the state machine. */
/* Process an inbound SACK. */ error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT,
error = sctp_cmd_process_sack(commands, asoc, SCTP_ST_TIMEOUT(SCTP_EVENT_TIMEOUT_T3_RTX),
cmd->obj.ptr); asoc->state,
break; asoc->ep, asoc,
transport, GFP_ATOMIC);
case SCTP_CMD_GEN_INIT_ACK: if (error)
/* Generate an INIT ACK chunk. */ asoc->base.sk->err = -error;
new_obj = sctp_make_init_ack(asoc, chunk, GFP_ATOMIC,
0);
if (!new_obj)
goto nomem;
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, out_unlock:
SCTP_CHUNK(new_obj)); sctp_bh_unlock_sock(asoc->base.sk);
break; sctp_transport_put(transport);
}
case SCTP_CMD_PEER_INIT: /* This is a sa interface for producing timeout events. It works
/* Process a unified INIT from the peer. * for timeouts which use the association as their parameter.
* Note: Only used during INIT-ACK processing. If
* there is an error just return to the outter
* layer which will bail.
*/ */
error = sctp_cmd_process_init(commands, asoc, chunk, static void sctp_generate_timeout_event(sctp_association_t *asoc,
cmd->obj.ptr, priority); sctp_event_timeout_t timeout_type)
break; {
int error = 0;
case SCTP_CMD_GEN_COOKIE_ECHO: sctp_bh_lock_sock(asoc->base.sk);
/* Generate a COOKIE ECHO chunk. */ if (sock_owned_by_user(asoc->base.sk)) {
new_obj = sctp_make_cookie_echo(asoc, chunk); SCTP_DEBUG_PRINTK("%s:Sock is busy: timer %d\n",
if (!new_obj) { __FUNCTION__,
if (cmd->obj.ptr) timeout_type);
sctp_free_chunk(cmd->obj.ptr);
goto nomem;
}
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(new_obj));
/* If there is an ERROR chunk to be sent along with /* Try again later. */
* the COOKIE_ECHO, send it, too. if (!mod_timer(&asoc->timers[timeout_type], jiffies + (HZ/20)))
*/ sctp_association_hold(asoc);
if (cmd->obj.ptr) goto out_unlock;
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, }
SCTP_CHUNK(cmd->obj.ptr));
break;
case SCTP_CMD_GEN_SHUTDOWN: /* Is this association really dead and just waiting around for
/* Generate SHUTDOWN when in SHUTDOWN_SENT state. * the timer to let go of the reference?
* Reset error counts.
*/ */
asoc->overall_error_count = 0; if (asoc->base.dead)
goto out_unlock;
/* Generate a SHUTDOWN chunk. */
new_obj = sctp_make_shutdown(asoc);
if (!new_obj)
goto nomem;
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(new_obj));
break;
case SCTP_CMD_CHUNK_ULP: /* Run through the state machine. */
/* Send a chunk to the sockets layer. */ error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT,
SCTP_DEBUG_PRINTK("sm_sideff: %s %p, %s %p.\n", SCTP_ST_TIMEOUT(timeout_type),
"chunk_up:", cmd->obj.ptr, asoc->state, asoc->ep, asoc,
"ulpq:", &asoc->ulpq); (void *)timeout_type,
sctp_ulpq_tail_data(&asoc->ulpq, cmd->obj.ptr,
GFP_ATOMIC); GFP_ATOMIC);
break;
case SCTP_CMD_EVENT_ULP: if (error)
/* Send a notification to the sockets layer. */ asoc->base.sk->err = -error;
SCTP_DEBUG_PRINTK("sm_sideff: %s %p, %s %p.\n",
"event_up:",cmd->obj.ptr,
"ulpq:",&asoc->ulpq);
sctp_ulpq_tail_event(&asoc->ulpq, cmd->obj.ptr);
break;
case SCTP_CMD_REPLY: out_unlock:
/* Send a chunk to our peer. */ sctp_bh_unlock_sock(asoc->base.sk);
error = sctp_outq_tail(&asoc->outqueue, sctp_association_put(asoc);
cmd->obj.ptr); }
break;
case SCTP_CMD_SEND_PKT: void sctp_generate_t1_cookie_event(unsigned long data)
/* Send a full packet to our peer. */ {
packet = cmd->obj.ptr; sctp_association_t *asoc = (sctp_association_t *) data;
sctp_packet_transmit(packet); sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T1_COOKIE);
sctp_ootb_pkt_free(packet); }
break;
case SCTP_CMD_RETRAN: void sctp_generate_t1_init_event(unsigned long data)
/* Mark a transport for retransmission. */ {
sctp_retransmit(&asoc->outqueue, cmd->obj.transport, sctp_association_t *asoc = (sctp_association_t *) data;
SCTP_RETRANSMIT_T3_RTX); sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T1_INIT);
break; }
case SCTP_CMD_TRANSMIT: void sctp_generate_t2_shutdown_event(unsigned long data)
/* Kick start transmission. */ {
error = sctp_outq_flush(&asoc->outqueue, 0); sctp_association_t *asoc = (sctp_association_t *) data;
break; sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T2_SHUTDOWN);
}
case SCTP_CMD_ECN_CE: void sctp_generate_t5_shutdown_guard_event(unsigned long data)
/* Do delayed CE processing. */ {
sctp_do_ecn_ce_work(asoc, cmd->obj.u32); sctp_association_t *asoc = (sctp_association_t *)data;
break; sctp_generate_timeout_event(asoc,
SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD);
case SCTP_CMD_ECN_ECNE: } /* sctp_generate_t5_shutdown_guard_event() */
/* Do delayed ECNE processing. */
new_obj = sctp_do_ecn_ecne_work(asoc, cmd->obj.u32,
chunk);
if (new_obj)
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(new_obj));
break;
case SCTP_CMD_ECN_CWR: void sctp_generate_autoclose_event(unsigned long data)
/* Do delayed CWR processing. */ {
sctp_do_ecn_cwr_work(asoc, cmd->obj.u32); sctp_association_t *asoc = (sctp_association_t *) data;
break; sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_AUTOCLOSE);
}
case SCTP_CMD_SETUP_T2: /* Generate a heart beat event. If the sock is busy, reschedule. Make
sctp_cmd_setup_t2(commands, asoc, cmd->obj.ptr); * sure that the transport is still valid.
break; */
void sctp_generate_heartbeat_event(unsigned long data)
{
int error = 0;
struct sctp_transport *transport = (struct sctp_transport *) data;
sctp_association_t *asoc = transport->asoc;
case SCTP_CMD_TIMER_START: sctp_bh_lock_sock(asoc->base.sk);
timer = &asoc->timers[cmd->obj.to]; if (sock_owned_by_user(asoc->base.sk)) {
timeout = asoc->timeouts[cmd->obj.to]; SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __FUNCTION__);
if (!timeout)
BUG();
timer->expires = jiffies + timeout; /* Try again later. */
sctp_association_hold(asoc); if (!mod_timer(&transport->hb_timer, jiffies + (HZ/20)))
add_timer(timer); sctp_transport_hold(transport);
break; goto out_unlock;
}
case SCTP_CMD_TIMER_RESTART: /* Is this structure just waiting around for us to actually
timer = &asoc->timers[cmd->obj.to]; * get destroyed?
timeout = asoc->timeouts[cmd->obj.to]; */
if (!mod_timer(timer, jiffies + timeout)) if (transport->dead)
sctp_association_hold(asoc); goto out_unlock;
break;
case SCTP_CMD_TIMER_STOP: error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT,
timer = &asoc->timers[cmd->obj.to]; SCTP_ST_TIMEOUT(SCTP_EVENT_TIMEOUT_HEARTBEAT),
if (timer_pending(timer) && del_timer(timer)) asoc->state,
sctp_association_put(asoc); asoc->ep, asoc,
break; transport, GFP_ATOMIC);
case SCTP_CMD_INIT_RESTART: if (error)
/* Do the needed accounting and updates asoc->base.sk->err = -error;
* associated with restarting an initialization
* timer.
*/
asoc->counters[SCTP_COUNTER_INIT_ERROR]++;
asoc->timeouts[cmd->obj.to] *= 2;
if (asoc->timeouts[cmd->obj.to] >
asoc->max_init_timeo) {
asoc->timeouts[cmd->obj.to] =
asoc->max_init_timeo;
}
/* If we've sent any data bundled with out_unlock:
* COOKIE-ECHO we need to resend. sctp_bh_unlock_sock(asoc->base.sk);
*/ sctp_transport_put(transport);
list_for_each(pos, &asoc->peer.transport_addr_list) { }
t = list_entry(pos, struct sctp_transport,
transports);
sctp_retransmit_mark(&asoc->outqueue, t, 0);
}
sctp_add_cmd_sf(commands, /* Inject a SACK Timeout event into the state machine. */
SCTP_CMD_TIMER_RESTART, void sctp_generate_sack_event(unsigned long data)
SCTP_TO(cmd->obj.to)); {
break; sctp_association_t *asoc = (sctp_association_t *) data;
sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_SACK);
}
case SCTP_CMD_INIT_FAILED: sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES] = {
sctp_cmd_init_failed(commands, asoc); NULL,
break; sctp_generate_t1_cookie_event,
sctp_generate_t1_init_event,
sctp_generate_t2_shutdown_event,
NULL,
sctp_generate_t5_shutdown_guard_event,
sctp_generate_heartbeat_event,
sctp_generate_sack_event,
sctp_generate_autoclose_event,
};
case SCTP_CMD_ASSOC_FAILED:
sctp_cmd_assoc_failed(commands, asoc, event_type,
subtype, chunk);
break;
case SCTP_CMD_COUNTER_INC: /* RFC 2960 8.2 Path Failure Detection
asoc->counters[cmd->obj.counter]++; *
break; * When its peer endpoint is multi-homed, an endpoint should keep a
* error counter for each of the destination transport addresses of the
* peer endpoint.
*
* Each time the T3-rtx timer expires on any address, or when a
* HEARTBEAT sent to an idle address is not acknowledged within a RTO,
* the error counter of that destination address will be incremented.
* When the value in the error counter exceeds the protocol parameter
* 'Path.Max.Retrans' of that destination address, the endpoint should
* mark the destination transport address as inactive, and a
* notification SHOULD be sent to the upper layer.
*
*/
static void sctp_do_8_2_transport_strike(sctp_association_t *asoc,
struct sctp_transport *transport)
{
/* The check for association's overall error counter exceeding the
* threshold is done in the state function.
*/
asoc->overall_error_count++;
case SCTP_CMD_COUNTER_RESET: if (transport->active &&
asoc->counters[cmd->obj.counter] = 0; (transport->error_count++ >= transport->error_threshold)) {
break; SCTP_DEBUG_PRINTK("transport_strike: transport "
"IP:%d.%d.%d.%d failed.\n",
NIPQUAD(transport->ipaddr.v4.sin_addr));
sctp_assoc_control_transport(asoc, transport,
SCTP_TRANSPORT_DOWN,
SCTP_FAILED_THRESHOLD);
}
case SCTP_CMD_REPORT_DUP: /* E2) For the destination address for which the timer
sctp_tsnmap_mark_dup(&asoc->peer.tsn_map, * expires, set RTO <- RTO * 2 ("back off the timer"). The
cmd->obj.u32); * maximum value discussed in rule C7 above (RTO.max) may be
break; * used to provide an upper bound to this doubling operation.
*/
transport->rto = min((transport->rto * 2), transport->asoc->rto_max);
}
case SCTP_CMD_REPORT_BAD_TAG: /* Worker routine to handle INIT command failure. */
SCTP_DEBUG_PRINTK("vtag mismatch!\n"); static void sctp_cmd_init_failed(sctp_cmd_seq_t *commands,
break; sctp_association_t *asoc,
unsigned error)
{
struct sctp_ulpevent *event;
case SCTP_CMD_STRIKE: event = sctp_ulpevent_make_assoc_change(asoc,0, SCTP_CANT_STR_ASSOC,
/* Mark one strike against a transport. */ 0, 0, 0, GFP_ATOMIC);
sctp_do_8_2_transport_strike(asoc, cmd->obj.transport);
break;
case SCTP_CMD_TRANSPORT_RESET: if (event)
t = cmd->obj.transport; sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
sctp_cmd_transport_reset(commands, asoc, t); SCTP_ULPEVENT(event));
break;
case SCTP_CMD_TRANSPORT_ON: /* SEND_FAILED sent later when cleaning up the association. */
t = cmd->obj.transport; asoc->outqueue.error = error;
sctp_cmd_transport_on(commands, asoc, t, chunk); sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, SCTP_NULL());
break; }
case SCTP_CMD_HB_TIMERS_START: /* Worker routine to handle SCTP_CMD_ASSOC_FAILED. */
sctp_cmd_hb_timers_start(commands, asoc); static void sctp_cmd_assoc_failed(sctp_cmd_seq_t *commands,
break; struct sctp_association *asoc,
sctp_event_t event_type,
sctp_subtype_t subtype,
struct sctp_chunk *chunk,
unsigned error)
{
struct sctp_ulpevent *event;
case SCTP_CMD_HB_TIMER_UPDATE: /* Cancel any partial delivery in progress. */
t = cmd->obj.transport; sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC);
sctp_cmd_hb_timer_update(commands, asoc, t);
break;
case SCTP_CMD_HB_TIMERS_STOP: event = sctp_ulpevent_make_assoc_change(asoc, 0, SCTP_COMM_LOST,
sctp_cmd_hb_timers_stop(commands, asoc); (__u16)error, 0, 0,
break; GFP_ATOMIC);
if (event)
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
SCTP_ULPEVENT(event));
case SCTP_CMD_REPORT_ERROR: sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE,
error = cmd->obj.error; SCTP_STATE(SCTP_STATE_CLOSED));
break;
case SCTP_CMD_PROCESS_CTSN: /* SEND_FAILED sent later when cleaning up the association. */
/* Dummy up a SACK for processing. */ asoc->outqueue.error = error;
sackh.cum_tsn_ack = cmd->obj.u32; sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, SCTP_NULL());
sackh.a_rwnd = 0; }
sackh.num_gap_ack_blocks = 0;
sackh.num_dup_tsns = 0;
sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_SACK,
SCTP_SACKH(&sackh));
break;
case SCTP_CMD_DISCARD_PACKET: /* Process an init chunk (may be real INIT/INIT-ACK or an embedded INIT
/* We need to discard the whole packet. */ * inside the cookie. In reality, this is only used for INIT-ACK processing
chunk->pdiscard = 1; * since all other cases use "temporary" associations and can do all
break; * their work in statefuns directly.
*/
static int sctp_cmd_process_init(sctp_cmd_seq_t *commands,
struct sctp_association *asoc,
struct sctp_chunk *chunk,
sctp_init_chunk_t *peer_init, int gfp)
{
int error;
case SCTP_CMD_RTO_PENDING: /* We only process the init as a sideeffect in a single
t = cmd->obj.transport; * case. This is when we process the INIT-ACK. If we
t->rto_pending = 1; * fail during INIT processing (due to malloc problems),
break; * just return the error and stop processing the stack.
*/
if (!sctp_process_init(asoc, chunk->chunk_hdr->type,
sctp_source(chunk), peer_init, gfp))
error = -ENOMEM;
else
error = 0;
case SCTP_CMD_PART_DELIVER: return error;
sctp_ulpq_partial_delivery(&asoc->ulpq, cmd->obj.ptr, }
GFP_ATOMIC);
break;
case SCTP_CMD_RENEGE: /* Helper function to break out starting up of heartbeat timers. */
sctp_ulpq_renege(&asoc->ulpq, cmd->obj.ptr, static void sctp_cmd_hb_timers_start(sctp_cmd_seq_t *cmds,
GFP_ATOMIC); sctp_association_t *asoc)
break; {
struct sctp_transport *t;
struct list_head *pos;
/* Start a heartbeat timer for each transport on the association.
* hold a reference on the transport to make sure none of
* the needed data structures go away.
*/
list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, struct sctp_transport, transports);
default: if (!mod_timer(&t->hb_timer, sctp_transport_timeout(t)))
printk(KERN_WARNING "Impossible command: %u, %p\n", sctp_transport_hold(t);
cmd->verb, cmd->obj.ptr);
break;
};
if (error)
return error;
} }
}
return error; static void sctp_cmd_hb_timers_stop(sctp_cmd_seq_t *cmds,
sctp_association_t *asoc)
{
struct sctp_transport *t;
struct list_head *pos;
nomem: /* Stop all heartbeat timers. */
error = -ENOMEM;
return error; list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, struct sctp_transport, transports);
if (del_timer(&t->hb_timer))
sctp_transport_put(t);
}
} }
/* A helper function for delayed processing of INET ECN CE bit. */ /* Helper function to update the heartbeat timer. */
static void sctp_do_ecn_ce_work(sctp_association_t *asoc, __u32 lowest_tsn) static void sctp_cmd_hb_timer_update(sctp_cmd_seq_t *cmds,
sctp_association_t *asoc,
struct sctp_transport *t)
{ {
/* Save the TSN away for comparison when we receive CWR */ /* Update the heartbeat timer. */
if (!mod_timer(&t->hb_timer, sctp_transport_timeout(t)))
asoc->last_ecne_tsn = lowest_tsn; sctp_transport_hold(t);
asoc->need_ecne = 1;
} }
/* Helper function for delayed processing of SCTP ECNE chunk. */ /* Helper function to handle the reception of an HEARTBEAT ACK. */
/* RFC 2960 Appendix A static void sctp_cmd_transport_on(sctp_cmd_seq_t *cmds,
* sctp_association_t *asoc,
* RFC 2481 details a specific bit for a sender to send in struct sctp_transport *t,
* the header of its next outbound TCP segment to indicate to
* its peer that it has reduced its congestion window. This
* is termed the CWR bit. For SCTP the same indication is made
* by including the CWR chunk. This chunk contains one data
* element, i.e. the TSN number that was sent in the ECNE chunk.
* This element represents the lowest TSN number in the datagram
* that was originally marked with the CE bit.
*/
static sctp_chunk_t *sctp_do_ecn_ecne_work(sctp_association_t *asoc,
__u32 lowest_tsn,
sctp_chunk_t *chunk) sctp_chunk_t *chunk)
{ {
sctp_chunk_t *repl; sctp_sender_hb_info_t *hbinfo;
/* Our previously transmitted packet ran into some congestion /* 8.3 Upon the receipt of the HEARTBEAT ACK, the sender of the
* so we should take action by reducing cwnd and ssthresh * HEARTBEAT should clear the error counter of the destination
* and then ACK our peer that we we've done so by * transport address to which the HEARTBEAT was sent.
* sending a CWR. * The association's overall error count is also cleared.
*/ */
t->error_count = 0;
t->asoc->overall_error_count = 0;
/* First, try to determine if we want to actually lower /* Mark the destination transport address as active if it is not so
* our cwnd variables. Only lower them if the ECNE looks more * marked.
* recent than the last response.
*/ */
if (TSN_lt(asoc->last_cwr_tsn, lowest_tsn)) { if (!t->active)
struct sctp_transport *transport; sctp_assoc_control_transport(asoc, t, SCTP_TRANSPORT_UP,
SCTP_HEARTBEAT_SUCCESS);
/* Find which transport's congestion variables /* The receiver of the HEARTBEAT ACK should also perform an
* need to be adjusted. * RTT measurement for that destination transport address
* using the time value carried in the HEARTBEAT ACK chunk.
*/ */
transport = sctp_assoc_lookup_tsn(asoc, lowest_tsn); hbinfo = (sctp_sender_hb_info_t *) chunk->skb->data;
sctp_transport_update_rto(t, (jiffies - hbinfo->sent_at));
/* Update the congestion variables. */ }
if (transport)
sctp_transport_lower_cwnd(transport,
SCTP_LOWER_CWND_ECNE);
asoc->last_cwr_tsn = lowest_tsn;
}
/* Always try to quiet the other end. In case of lost CWR, /* Helper function to do a transport reset at the expiry of the hearbeat
* resend last_cwr_tsn. * timer.
*/ */
repl = sctp_make_cwr(asoc, asoc->last_cwr_tsn, chunk); static void sctp_cmd_transport_reset(sctp_cmd_seq_t *cmds,
sctp_association_t *asoc,
struct sctp_transport *t)
{
sctp_transport_lower_cwnd(t, SCTP_LOWER_CWND_INACTIVE);
/* If we run out of memory, it will look like a lost CWR. We'll /* Mark one strike against a transport. */
* get back in sync eventually. sctp_do_8_2_transport_strike(asoc, t);
*/
return repl;
} }
/* Helper function to do delayed processing of ECN CWR chunk. */ /* Helper function to process the process SACK command. */
static void sctp_do_ecn_cwr_work(sctp_association_t *asoc, static int sctp_cmd_process_sack(sctp_cmd_seq_t *cmds,
__u32 lowest_tsn) sctp_association_t *asoc,
sctp_sackhdr_t *sackh)
{ {
/* Turn off ECNE getting auto-prepended to every outgoing int err;
* packet
if (sctp_outq_sack(&asoc->outqueue, sackh)) {
/* There are no more TSNs awaiting SACK. */
err = sctp_do_sm(SCTP_EVENT_T_OTHER,
SCTP_ST_OTHER(SCTP_EVENT_NO_PENDING_TSN),
asoc->state, asoc->ep, asoc, NULL,
GFP_ATOMIC);
} else {
/* Windows may have opened, so we need
* to check if we have DATA to transmit
*/ */
asoc->need_ecne = 0; err = sctp_outq_flush(&asoc->outqueue, 0);
}
return err;
} }
/* This macro is to compress the text a bit... */ /* Helper function to set the timeout value for T2-SHUTDOWN timer and to set
#define AP(v) asoc->peer.v * the transport for a shutdown chunk.
*/
static void sctp_cmd_setup_t2(sctp_cmd_seq_t *cmds, sctp_association_t *asoc,
sctp_chunk_t *chunk)
{
struct sctp_transport *t;
t = sctp_assoc_choose_shutdown_transport(asoc);
asoc->shutdown_last_sent_to = t;
asoc->timeouts[SCTP_EVENT_TIMEOUT_T2_SHUTDOWN] = t->rto;
chunk->transport = t;
}
/* Generate SACK if necessary. We call this at the end of a packet. */ /* Helper function to change the state of an association. */
int sctp_gen_sack(sctp_association_t *asoc, int force, sctp_cmd_seq_t *commands) static void sctp_cmd_new_state(sctp_cmd_seq_t *cmds, sctp_association_t *asoc,
sctp_state_t state)
{ {
__u32 ctsn, max_tsn_seen;
sctp_chunk_t *sack;
int error = 0;
if (force) struct sock *sk = asoc->base.sk;
asoc->peer.sack_needed = 1; struct sctp_opt *sp = sctp_sk(sk);
ctsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map); asoc->state = state;
max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map); asoc->state_timestamp = jiffies;
/* From 12.2 Parameters necessary per association (i.e. the TCB): if ((SCTP_STATE_ESTABLISHED == asoc->state) ||
* (SCTP_STATE_CLOSED == asoc->state)) {
* Ack State : This flag indicates if the next received packet /* Wake up any processes waiting in the asoc's wait queue in
* : is to be responded to with a SACK. ... * sctp_wait_for_connect() or sctp_wait_for_sndbuf().
* : When DATA chunks are out of order, SACK's
* : are not delayed (see Section 6).
*
* [This is actually not mentioned in Section 6, but we
* implement it here anyway. --piggy]
*/ */
if (max_tsn_seen != ctsn) if (waitqueue_active(&asoc->wait))
asoc->peer.sack_needed = 1; wake_up_interruptible(&asoc->wait);
/* From 6.2 Acknowledgement on Reception of DATA Chunks: /* Wake up any processes waiting in the sk's sleep queue of
* a TCP-style or UDP-style peeled-off socket in
* sctp_wait_for_accept() or sctp_wait_for_packet().
* For a UDP-style socket, the waiters are woken up by the
* notifications.
*/
if (SCTP_SOCKET_UDP != sp->type)
sk->state_change(sk);
}
/* Change the sk->state of a TCP-style socket that has sucessfully
* completed a connect() call.
*/
if ((SCTP_STATE_ESTABLISHED == asoc->state) &&
(SCTP_SOCKET_TCP == sp->type) && (SCTP_SS_CLOSED == sk->state))
sk->state = SCTP_SS_ESTABLISHED;
}
/* These three macros allow us to pull the debugging code out of the
* main flow of sctp_do_sm() to keep attention focused on the real
* functionality there.
*/
#define DEBUG_PRE \
SCTP_DEBUG_PRINTK("sctp_do_sm prefn: " \
"ep %p, %s, %s, asoc %p[%s], %s\n", \
ep, sctp_evttype_tbl[event_type], \
(*debug_fn)(subtype), asoc, \
sctp_state_tbl[state], state_fn->name)
#define DEBUG_POST \
SCTP_DEBUG_PRINTK("sctp_do_sm postfn: " \
"asoc %p, status: %s\n", \
asoc, sctp_status_tbl[status])
#define DEBUG_POST_SFX \
SCTP_DEBUG_PRINTK("sctp_do_sm post sfx: error %d, asoc %p[%s]\n", \
error, asoc, \
sctp_state_tbl[(asoc && sctp_id2assoc(ep->base.sk, \
sctp_assoc2id(asoc)))?asoc->state:SCTP_STATE_CLOSED])
/*
* This is the master state machine processing function.
* *
* Section 4.2 of [RFC2581] SHOULD be followed. Specifically, * If you want to understand all of lksctp, this is a
* an acknowledgement SHOULD be generated for at least every * good place to start.
* second packet (not every second DATA chunk) received, and
* SHOULD be generated within 200 ms of the arrival of any
* unacknowledged DATA chunk. ...
*/ */
if (!asoc->peer.sack_needed) { int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype,
/* We will need a SACK for the next packet. */ sctp_state_t state,
asoc->peer.sack_needed = 1; sctp_endpoint_t *ep,
goto out; sctp_association_t *asoc,
} else { void *event_arg,
if (asoc->a_rwnd > asoc->rwnd) int priority)
asoc->a_rwnd = asoc->rwnd; {
sack = sctp_make_sack(asoc); sctp_cmd_seq_t commands;
if (!sack) sctp_sm_table_entry_t *state_fn;
goto nomem; sctp_disposition_t status;
int error = 0;
typedef const char *(printfn_t)(sctp_subtype_t);
static printfn_t *table[] = {
NULL, sctp_cname, sctp_tname, sctp_oname, sctp_pname,
};
printfn_t *debug_fn __attribute__ ((unused)) = table[event_type];
asoc->peer.sack_needed = 0; /* Look up the state function, run it, and then process the
* side effects. These three steps are the heart of lksctp.
*/
state_fn = sctp_sm_lookup_event(event_type, state, subtype);
error = sctp_outq_tail(&asoc->outqueue, sack); sctp_init_cmd_seq(&commands);
/* Stop the SACK timer. */ DEBUG_PRE;
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, status = (*state_fn->fn)(ep, asoc, subtype, event_arg, &commands);
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK)); DEBUG_POST;
}
out: error = sctp_side_effects(event_type, subtype, state,
return error; ep, asoc, event_arg,
status, &commands,
priority);
DEBUG_POST_SFX;
nomem:
error = -ENOMEM;
return error; return error;
} }
/* Handle a duplicate TSN. */ #undef DEBUG_PRE
void sctp_do_TSNdup(sctp_association_t *asoc, sctp_chunk_t *chunk, long gap) #undef DEBUG_POST
{
#if 0
sctp_chunk_t *sack;
/* Caution: gap < 2 * SCTP_TSN_MAP_SIZE
* so gap can be negative.
*
* --xguo
*/
/* Count this TSN. */
if (gap < SCTP_TSN_MAP_SIZE) {
asoc->peer.tsn_map[gap]++;
} else {
asoc->peer.tsn_map_overflow[gap - SCTP_TSN_MAP_SIZE]++;
}
/* From 6.2 Acknowledgement on Reception of DATA Chunks
*
* When a packet arrives with duplicate DATA chunk(s)
* and with no new DATA chunk(s), the endpoint MUST
* immediately send a SACK with no delay. If a packet
* arrives with duplicate DATA chunk(s) bundled with
* new DATA chunks, the endpoint MAY immediately send a
* SACK. Normally receipt of duplicate DATA chunks
* will occur when the original SACK chunk was lost and
* the peer's RTO has expired. The duplicate TSN
* number(s) SHOULD be reported in the SACK as
* duplicate.
*/
asoc->counters[SctpCounterAckState] = 2;
#endif /* 0 */
} /* sctp_do_TSNdup() */
#undef AP
/* When the T3-RTX timer expires, it calls this function to create the /*****************************************************************
* relevant state machine event. * This the master state function side effect processing function.
*/ *****************************************************************/
void sctp_generate_t3_rtx_event(unsigned long peer) int sctp_side_effects(sctp_event_t event_type, sctp_subtype_t subtype,
sctp_state_t state,
sctp_endpoint_t *ep,
sctp_association_t *asoc,
void *event_arg,
sctp_disposition_t status,
sctp_cmd_seq_t *commands,
int priority)
{ {
int error; int error;
struct sctp_transport *transport = (struct sctp_transport *) peer;
sctp_association_t *asoc = transport->asoc;
/* Check whether a task is in the sock. */
sctp_bh_lock_sock(asoc->base.sk);
if (sock_owned_by_user(asoc->base.sk)) {
SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __FUNCTION__);
/* Try again later. */
if (!mod_timer(&transport->T3_rtx_timer, jiffies + (HZ/20)))
sctp_transport_hold(transport);
goto out_unlock;
}
/* Is this transport really dead and just waiting around for /* FIXME - Most of the dispositions left today would be categorized
* the timer to let go of the reference? * as "exceptional" dispositions. For those dispositions, it
* may not be proper to run through any of the commands at all.
* For example, the command interpreter might be run only with
* disposition SCTP_DISPOSITION_CONSUME.
*/ */
if (transport->dead) if (0 != (error = sctp_cmd_interpreter(event_type, subtype, state,
goto out_unlock; ep, asoc,
event_arg, status,
/* Run through the state machine. */ commands, priority)))
error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT, goto bail;
SCTP_ST_TIMEOUT(SCTP_EVENT_TIMEOUT_T3_RTX),
asoc->state,
asoc->ep, asoc,
transport, GFP_ATOMIC);
if (error)
asoc->base.sk->err = -error;
out_unlock: switch (status) {
sctp_bh_unlock_sock(asoc->base.sk); case SCTP_DISPOSITION_DISCARD:
sctp_transport_put(transport); SCTP_DEBUG_PRINTK("Ignored sctp protocol event - state %d, "
} "event_type %d, event_id %d\n",
state, event_type, subtype.chunk);
break;
/* This is a sa interface for producing timeout events. It works case SCTP_DISPOSITION_NOMEM:
* for timeouts which use the association as their parameter. /* We ran out of memory, so we need to discard this
* packet.
*/ */
static void sctp_generate_timeout_event(sctp_association_t *asoc, /* BUG--we should now recover some memory, probably by
sctp_event_timeout_t timeout_type) * reneging...
{ */
int error = 0; error = -ENOMEM;
break;
sctp_bh_lock_sock(asoc->base.sk);
if (sock_owned_by_user(asoc->base.sk)) {
SCTP_DEBUG_PRINTK("%s:Sock is busy: timer %d\n",
__FUNCTION__,
timeout_type);
/* Try again later. */ case SCTP_DISPOSITION_DELETE_TCB:
if (!mod_timer(&asoc->timers[timeout_type], jiffies + (HZ/20))) /* This should now be a command. */
sctp_association_hold(asoc); break;
goto out_unlock;
}
/* Is this association really dead and just waiting around for case SCTP_DISPOSITION_CONSUME:
* the timer to let go of the reference? case SCTP_DISPOSITION_ABORT:
/*
* We should no longer have much work to do here as the
* real work has been done as explicit commands above.
*/ */
if (asoc->base.dead) break;
goto out_unlock;
/* Run through the state machine. */ case SCTP_DISPOSITION_VIOLATION:
error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT, printk(KERN_ERR "sctp protocol violation state %d "
SCTP_ST_TIMEOUT(timeout_type), "chunkid %d\n", state, subtype.chunk);
asoc->state, asoc->ep, asoc, break;
(void *)timeout_type,
GFP_ATOMIC);
if (error) case SCTP_DISPOSITION_NOT_IMPL:
asoc->base.sk->err = -error; printk(KERN_WARNING "sctp unimplemented feature in state %d, "
"event_type %d, event_id %d\n",
state, event_type, subtype.chunk);
break;
out_unlock: case SCTP_DISPOSITION_BUG:
sctp_bh_unlock_sock(asoc->base.sk); printk(KERN_ERR "sctp bug in state %d, "
sctp_association_put(asoc); "event_type %d, event_id %d\n",
} state, event_type, subtype.chunk);
BUG();
break;
void sctp_generate_t1_cookie_event(unsigned long data) default:
{ printk(KERN_ERR "sctp impossible disposition %d "
sctp_association_t *asoc = (sctp_association_t *) data; "in state %d, event_type %d, event_id %d\n",
sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T1_COOKIE); status, state, event_type, subtype.chunk);
} BUG();
break;
};
void sctp_generate_t1_init_event(unsigned long data) bail:
{ return error;
sctp_association_t *asoc = (sctp_association_t *) data;
sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T1_INIT);
} }
void sctp_generate_t2_shutdown_event(unsigned long data) /********************************************************************
{ * 2nd Level Abstractions
sctp_association_t *asoc = (sctp_association_t *) data; ********************************************************************/
sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T2_SHUTDOWN);
}
void sctp_generate_t5_shutdown_guard_event(unsigned long data) /* This is the side-effect interpreter. */
int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
sctp_state_t state, sctp_endpoint_t *ep,
sctp_association_t *asoc, void *event_arg,
sctp_disposition_t status, sctp_cmd_seq_t *commands,
int priority)
{ {
sctp_association_t *asoc = (sctp_association_t *)data; int error = 0;
sctp_generate_timeout_event(asoc, int force;
SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD); sctp_cmd_t *cmd;
sctp_chunk_t *new_obj;
} /* sctp_generate_t5_shutdown_guard_event() */ sctp_chunk_t *chunk = NULL;
struct sctp_packet *packet;
struct list_head *pos;
struct timer_list *timer;
unsigned long timeout;
struct sctp_transport *t;
sctp_sackhdr_t sackh;
void sctp_generate_autoclose_event(unsigned long data) if(SCTP_EVENT_T_TIMEOUT != event_type)
{ chunk = (sctp_chunk_t *) event_arg;
sctp_association_t *asoc = (sctp_association_t *) data;
sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_AUTOCLOSE);
}
/* Generate a heart beat event. If the sock is busy, reschedule. Make /* Note: This whole file is a huge candidate for rework.
* sure that the transport is still valid. * For example, each command could either have its own handler, so
* the loop would look like:
* while (cmds)
* cmd->handle(x, y, z)
* --jgrimm
*/ */
void sctp_generate_heartbeat_event(unsigned long data) while (NULL != (cmd = sctp_next_cmd(commands))) {
{ switch (cmd->verb) {
int error = 0; case SCTP_CMD_NOP:
struct sctp_transport *transport = (struct sctp_transport *) data; /* Do nothing. */
sctp_association_t *asoc = transport->asoc; break;
sctp_bh_lock_sock(asoc->base.sk); case SCTP_CMD_NEW_ASOC:
if (sock_owned_by_user(asoc->base.sk)) { /* Register a new association. */
SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __FUNCTION__); asoc = cmd->obj.ptr;
/* Register with the endpoint. */
sctp_endpoint_add_asoc(ep, asoc);
sctp_hash_established(asoc);
break;
/* Try again later. */ case SCTP_CMD_UPDATE_ASSOC:
if (!mod_timer(&transport->hb_timer, jiffies + (HZ/20))) sctp_assoc_update(asoc, cmd->obj.ptr);
sctp_transport_hold(transport); break;
goto out_unlock;
}
/* Is this structure just waiting around for us to actually case SCTP_CMD_PURGE_OUTQUEUE:
* get destroyed? sctp_outq_teardown(&asoc->outqueue);
*/ break;
if (transport->dead)
goto out_unlock;
error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT, case SCTP_CMD_DELETE_TCB:
SCTP_ST_TIMEOUT(SCTP_EVENT_TIMEOUT_HEARTBEAT), /* Delete the current association. */
asoc->state, sctp_unhash_established(asoc);
asoc->ep, asoc, sctp_association_free(asoc);
transport, GFP_ATOMIC); asoc = NULL;
break;
if (error) case SCTP_CMD_NEW_STATE:
asoc->base.sk->err = -error; /* Enter a new state. */
sctp_cmd_new_state(commands, asoc, cmd->obj.state);
break;
out_unlock: case SCTP_CMD_REPORT_TSN:
sctp_bh_unlock_sock(asoc->base.sk); /* Record the arrival of a TSN. */
sctp_transport_put(transport); sctp_tsnmap_mark(&asoc->peer.tsn_map, cmd->obj.u32);
} break;
/* Inject a SACK Timeout event into the state machine. */ case SCTP_CMD_GEN_SACK:
void sctp_generate_sack_event(unsigned long data) /* Generate a Selective ACK.
{ * The argument tells us whether to just count
sctp_association_t *asoc = (sctp_association_t *) data; * the packet and MAYBE generate a SACK, or
sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_SACK); * force a SACK out.
} */
force = cmd->obj.i32;
error = sctp_gen_sack(asoc, force, commands);
break;
sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES] = { case SCTP_CMD_PROCESS_SACK:
NULL, /* Process an inbound SACK. */
sctp_generate_t1_cookie_event, error = sctp_cmd_process_sack(commands, asoc,
sctp_generate_t1_init_event, cmd->obj.ptr);
sctp_generate_t2_shutdown_event, break;
NULL,
sctp_generate_t5_shutdown_guard_event,
sctp_generate_heartbeat_event,
sctp_generate_sack_event,
sctp_generate_autoclose_event,
};
/******************************************************************** case SCTP_CMD_GEN_INIT_ACK:
* 3rd Level Abstractions /* Generate an INIT ACK chunk. */
********************************************************************/ new_obj = sctp_make_init_ack(asoc, chunk, GFP_ATOMIC,
0);
if (!new_obj)
goto nomem;
/* RFC 2960 8.2 Path Failure Detection sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
* SCTP_CHUNK(new_obj));
* When its peer endpoint is multi-homed, an endpoint should keep a break;
* error counter for each of the destination transport addresses of the
* peer endpoint. case SCTP_CMD_PEER_INIT:
* /* Process a unified INIT from the peer.
* Each time the T3-rtx timer expires on any address, or when a * Note: Only used during INIT-ACK processing. If
* HEARTBEAT sent to an idle address is not acknowledged within a RTO, * there is an error just return to the outter
* the error counter of that destination address will be incremented. * layer which will bail.
* When the value in the error counter exceeds the protocol parameter
* 'Path.Max.Retrans' of that destination address, the endpoint should
* mark the destination transport address as inactive, and a
* notification SHOULD be sent to the upper layer.
*
*/
static void sctp_do_8_2_transport_strike(sctp_association_t *asoc,
struct sctp_transport *transport)
{
/* The check for association's overall error counter exceeding the
* threshold is done in the state function.
*/ */
asoc->overall_error_count++; error = sctp_cmd_process_init(commands, asoc, chunk,
cmd->obj.ptr, priority);
break;
if (transport->active && case SCTP_CMD_GEN_COOKIE_ECHO:
(transport->error_count++ >= transport->error_threshold)) { /* Generate a COOKIE ECHO chunk. */
SCTP_DEBUG_PRINTK("transport_strike: transport " new_obj = sctp_make_cookie_echo(asoc, chunk);
"IP:%d.%d.%d.%d failed.\n", if (!new_obj) {
NIPQUAD(transport->ipaddr.v4.sin_addr)); if (cmd->obj.ptr)
sctp_assoc_control_transport(asoc, transport, sctp_free_chunk(cmd->obj.ptr);
SCTP_TRANSPORT_DOWN, goto nomem;
SCTP_FAILED_THRESHOLD);
} }
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(new_obj));
/* E2) For the destination address for which the timer /* If there is an ERROR chunk to be sent along with
* expires, set RTO <- RTO * 2 ("back off the timer"). The * the COOKIE_ECHO, send it, too.
* maximum value discussed in rule C7 above (RTO.max) may be
* used to provide an upper bound to this doubling operation.
*/ */
transport->rto = min((transport->rto * 2), transport->asoc->rto_max); if (cmd->obj.ptr)
} sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(cmd->obj.ptr));
break;
/* Worker routine to handle INIT command failure. */ case SCTP_CMD_GEN_SHUTDOWN:
static void sctp_cmd_init_failed(sctp_cmd_seq_t *commands, /* Generate SHUTDOWN when in SHUTDOWN_SENT state.
sctp_association_t *asoc) * Reset error counts.
{ */
struct sctp_ulpevent *event; asoc->overall_error_count = 0;
event = sctp_ulpevent_make_assoc_change(asoc, /* Generate a SHUTDOWN chunk. */
0, new_obj = sctp_make_shutdown(asoc);
SCTP_CANT_STR_ASSOC, if (!new_obj)
0, 0, 0, goto nomem;
GFP_ATOMIC); sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(new_obj));
break;
if (event) case SCTP_CMD_CHUNK_ULP:
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP, /* Send a chunk to the sockets layer. */
SCTP_ULPEVENT(event)); SCTP_DEBUG_PRINTK("sm_sideff: %s %p, %s %p.\n",
"chunk_up:", cmd->obj.ptr,
"ulpq:", &asoc->ulpq);
sctp_ulpq_tail_data(&asoc->ulpq, cmd->obj.ptr,
GFP_ATOMIC);
break;
/* FIXME: We need to handle data possibly either case SCTP_CMD_EVENT_ULP:
* sent via COOKIE-ECHO bundling or just waiting in /* Send a notification to the sockets layer. */
* the transmit queue, if the user has enabled SCTP_DEBUG_PRINTK("sm_sideff: %s %p, %s %p.\n",
* SEND_FAILED notifications. "event_up:",cmd->obj.ptr,
*/ "ulpq:",&asoc->ulpq);
sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, SCTP_NULL()); sctp_ulpq_tail_event(&asoc->ulpq, cmd->obj.ptr);
} break;
/* Worker routine to handle SCTP_CMD_ASSOC_FAILED. */ case SCTP_CMD_REPLY:
static void sctp_cmd_assoc_failed(sctp_cmd_seq_t *commands, /* Send a chunk to our peer. */
sctp_association_t *asoc, error = sctp_outq_tail(&asoc->outqueue,
sctp_event_t event_type, cmd->obj.ptr);
sctp_subtype_t subtype, break;
sctp_chunk_t *chunk)
{
struct sctp_ulpevent *event;
__u16 error = 0;
switch(event_type) { case SCTP_CMD_SEND_PKT:
case SCTP_EVENT_T_PRIMITIVE: /* Send a full packet to our peer. */
if (SCTP_PRIMITIVE_ABORT == subtype.primitive) packet = cmd->obj.ptr;
error = SCTP_ERROR_USER_ABORT; sctp_packet_transmit(packet);
sctp_ootb_pkt_free(packet);
break; break;
case SCTP_EVENT_T_CHUNK:
if (chunk && (SCTP_CID_ABORT == chunk->chunk_hdr->type) && case SCTP_CMD_RETRAN:
(ntohs(chunk->chunk_hdr->length) >= /* Mark a transport for retransmission. */
(sizeof(struct sctp_chunkhdr) + sctp_retransmit(&asoc->outqueue, cmd->obj.transport,
sizeof(struct sctp_errhdr)))) { SCTP_RTXR_T3_RTX);
error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
}
break; break;
default:
case SCTP_CMD_TRANSMIT:
/* Kick start transmission. */
error = sctp_outq_flush(&asoc->outqueue, 0);
break; break;
}
/* Cancel any partial delivery in progress. */ case SCTP_CMD_ECN_CE:
sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC); /* Do delayed CE processing. */
sctp_do_ecn_ce_work(asoc, cmd->obj.u32);
break;
event = sctp_ulpevent_make_assoc_change(asoc, 0, SCTP_COMM_LOST, case SCTP_CMD_ECN_ECNE:
error, 0, 0, GFP_ATOMIC); /* Do delayed ECNE processing. */
if (event) new_obj = sctp_do_ecn_ecne_work(asoc, cmd->obj.u32,
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP, chunk);
SCTP_ULPEVENT(event)); if (new_obj)
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
SCTP_CHUNK(new_obj));
break;
sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, case SCTP_CMD_ECN_CWR:
SCTP_STATE(SCTP_STATE_CLOSED)); /* Do delayed CWR processing. */
sctp_do_ecn_cwr_work(asoc, cmd->obj.u32);
break;
/* FIXME: We need to handle data that could not be sent or was not case SCTP_CMD_SETUP_T2:
* acked, if the user has enabled SEND_FAILED notifications. sctp_cmd_setup_t2(commands, asoc, cmd->obj.ptr);
*/ break;
sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, SCTP_NULL());
}
/* Process an init chunk (may be real INIT/INIT-ACK or an embedded INIT case SCTP_CMD_TIMER_START:
* inside the cookie. In reality, this is only used for INIT-ACK processing timer = &asoc->timers[cmd->obj.to];
* since all other cases use "temporary" associations and can do all timeout = asoc->timeouts[cmd->obj.to];
* their work in statefuns directly. if (!timeout)
*/ BUG();
static int sctp_cmd_process_init(sctp_cmd_seq_t *commands,
sctp_association_t *asoc,
sctp_chunk_t *chunk,
sctp_init_chunk_t *peer_init,
int priority)
{
int error;
/* We only process the init as a sideeffect in a single timer->expires = jiffies + timeout;
* case. This is when we process the INIT-ACK. If we sctp_association_hold(asoc);
* fail during INIT processing (due to malloc problems), add_timer(timer);
* just return the error and stop processing the stack. break;
*/
if (!sctp_process_init(asoc, chunk->chunk_hdr->type, case SCTP_CMD_TIMER_RESTART:
sctp_source(chunk), peer_init, timer = &asoc->timers[cmd->obj.to];
priority)) timeout = asoc->timeouts[cmd->obj.to];
error = -ENOMEM; if (!mod_timer(timer, jiffies + timeout))
else sctp_association_hold(asoc);
error = 0; break;
return error; case SCTP_CMD_TIMER_STOP:
} timer = &asoc->timers[cmd->obj.to];
if (timer_pending(timer) && del_timer(timer))
sctp_association_put(asoc);
break;
/* Helper function to break out starting up of heartbeat timers. */ case SCTP_CMD_INIT_RESTART:
static void sctp_cmd_hb_timers_start(sctp_cmd_seq_t *cmds, /* Do the needed accounting and updates
sctp_association_t *asoc) * associated with restarting an initialization
{ * timer.
struct sctp_transport *t; */
struct list_head *pos; asoc->counters[SCTP_COUNTER_INIT_ERROR]++;
asoc->timeouts[cmd->obj.to] *= 2;
if (asoc->timeouts[cmd->obj.to] >
asoc->max_init_timeo) {
asoc->timeouts[cmd->obj.to] =
asoc->max_init_timeo;
}
/* Start a heartbeat timer for each transport on the association. /* If we've sent any data bundled with
* hold a reference on the transport to make sure none of * COOKIE-ECHO we need to resend.
* the needed data structures go away.
*/ */
list_for_each(pos, &asoc->peer.transport_addr_list) { list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, struct sctp_transport, transports); t = list_entry(pos, struct sctp_transport,
transports);
if (!mod_timer(&t->hb_timer, sctp_transport_timeout(t))) sctp_retransmit_mark(&asoc->outqueue, t, 0);
sctp_transport_hold(t);
} }
}
static void sctp_cmd_hb_timers_stop(sctp_cmd_seq_t *cmds, sctp_add_cmd_sf(commands,
sctp_association_t *asoc) SCTP_CMD_TIMER_RESTART,
{ SCTP_TO(cmd->obj.to));
struct sctp_transport *t; break;
struct list_head *pos;
/* Stop all heartbeat timers. */ case SCTP_CMD_INIT_FAILED:
sctp_cmd_init_failed(commands, asoc, cmd->obj.u32);
break;
list_for_each(pos, &asoc->peer.transport_addr_list) { case SCTP_CMD_ASSOC_FAILED:
t = list_entry(pos, struct sctp_transport, transports); sctp_cmd_assoc_failed(commands, asoc, event_type,
if (del_timer(&t->hb_timer)) subtype, chunk, cmd->obj.u32);
sctp_transport_put(t); break;
}
}
/* Helper function to update the heartbeat timer. */ case SCTP_CMD_COUNTER_INC:
static void sctp_cmd_hb_timer_update(sctp_cmd_seq_t *cmds, asoc->counters[cmd->obj.counter]++;
sctp_association_t *asoc, break;
struct sctp_transport *t)
{
/* Update the heartbeat timer. */
if (!mod_timer(&t->hb_timer, sctp_transport_timeout(t)))
sctp_transport_hold(t);
}
/* Helper function to handle the reception of an HEARTBEAT ACK. */ case SCTP_CMD_COUNTER_RESET:
static void sctp_cmd_transport_on(sctp_cmd_seq_t *cmds, asoc->counters[cmd->obj.counter] = 0;
sctp_association_t *asoc, break;
struct sctp_transport *t,
sctp_chunk_t *chunk)
{
sctp_sender_hb_info_t *hbinfo;
/* 8.3 Upon the receipt of the HEARTBEAT ACK, the sender of the case SCTP_CMD_REPORT_DUP:
* HEARTBEAT should clear the error counter of the destination sctp_tsnmap_mark_dup(&asoc->peer.tsn_map,
* transport address to which the HEARTBEAT was sent. cmd->obj.u32);
* The association's overall error count is also cleared. break;
*/
t->error_count = 0;
t->asoc->overall_error_count = 0;
/* Mark the destination transport address as active if it is not so case SCTP_CMD_REPORT_BAD_TAG:
* marked. SCTP_DEBUG_PRINTK("vtag mismatch!\n");
*/ break;
if (!t->active)
sctp_assoc_control_transport(asoc, t, SCTP_TRANSPORT_UP,
SCTP_HEARTBEAT_SUCCESS);
/* The receiver of the HEARTBEAT ACK should also perform an case SCTP_CMD_STRIKE:
* RTT measurement for that destination transport address /* Mark one strike against a transport. */
* using the time value carried in the HEARTBEAT ACK chunk. sctp_do_8_2_transport_strike(asoc, cmd->obj.transport);
*/ break;
hbinfo = (sctp_sender_hb_info_t *) chunk->skb->data;
sctp_transport_update_rto(t, (jiffies - hbinfo->sent_at));
}
/* Helper function to do a transport reset at the expiry of the hearbeat case SCTP_CMD_TRANSPORT_RESET:
* timer. t = cmd->obj.transport;
*/ sctp_cmd_transport_reset(commands, asoc, t);
static void sctp_cmd_transport_reset(sctp_cmd_seq_t *cmds, break;
sctp_association_t *asoc,
struct sctp_transport *t)
{
sctp_transport_lower_cwnd(t, SCTP_LOWER_CWND_INACTIVE);
/* Mark one strike against a transport. */ case SCTP_CMD_TRANSPORT_ON:
sctp_do_8_2_transport_strike(asoc, t); t = cmd->obj.transport;
} sctp_cmd_transport_on(commands, asoc, t, chunk);
break;
/* Helper function to process the process SACK command. */ case SCTP_CMD_HB_TIMERS_START:
static int sctp_cmd_process_sack(sctp_cmd_seq_t *cmds, sctp_cmd_hb_timers_start(commands, asoc);
sctp_association_t *asoc, break;
sctp_sackhdr_t *sackh)
{
int err;
if (sctp_outq_sack(&asoc->outqueue, sackh)) { case SCTP_CMD_HB_TIMER_UPDATE:
/* There are no more TSNs awaiting SACK. */ t = cmd->obj.transport;
err = sctp_do_sm(SCTP_EVENT_T_OTHER, sctp_cmd_hb_timer_update(commands, asoc, t);
SCTP_ST_OTHER(SCTP_EVENT_NO_PENDING_TSN), break;
asoc->state, asoc->ep, asoc, NULL,
GFP_ATOMIC);
} else {
/* Windows may have opened, so we need
* to check if we have DATA to transmit
*/
err = sctp_outq_flush(&asoc->outqueue, 0);
}
return err; case SCTP_CMD_HB_TIMERS_STOP:
} sctp_cmd_hb_timers_stop(commands, asoc);
break;
/* Helper function to set the timeout value for T2-SHUTDOWN timer and to set case SCTP_CMD_REPORT_ERROR:
* the transport for a shutdown chunk. error = cmd->obj.error;
*/ break;
static void sctp_cmd_setup_t2(sctp_cmd_seq_t *cmds, sctp_association_t *asoc,
sctp_chunk_t *chunk)
{
struct sctp_transport *t;
t = sctp_assoc_choose_shutdown_transport(asoc); case SCTP_CMD_PROCESS_CTSN:
asoc->shutdown_last_sent_to = t; /* Dummy up a SACK for processing. */
asoc->timeouts[SCTP_EVENT_TIMEOUT_T2_SHUTDOWN] = t->rto; sackh.cum_tsn_ack = cmd->obj.u32;
chunk->transport = t; sackh.a_rwnd = 0;
} sackh.num_gap_ack_blocks = 0;
sackh.num_dup_tsns = 0;
sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_SACK,
SCTP_SACKH(&sackh));
break;
/* Helper function to change the state of an association. */ case SCTP_CMD_DISCARD_PACKET:
static void sctp_cmd_new_state(sctp_cmd_seq_t *cmds, sctp_association_t *asoc, /* We need to discard the whole packet. */
sctp_state_t state) chunk->pdiscard = 1;
{ break;
struct sock *sk = asoc->base.sk; case SCTP_CMD_RTO_PENDING:
struct sctp_opt *sp = sctp_sk(sk); t = cmd->obj.transport;
t->rto_pending = 1;
break;
asoc->state = state; case SCTP_CMD_PART_DELIVER:
asoc->state_timestamp = jiffies; sctp_ulpq_partial_delivery(&asoc->ulpq, cmd->obj.ptr,
GFP_ATOMIC);
break;
if ((SCTP_STATE_ESTABLISHED == asoc->state) || case SCTP_CMD_RENEGE:
(SCTP_STATE_CLOSED == asoc->state)) { sctp_ulpq_renege(&asoc->ulpq, cmd->obj.ptr,
/* Wake up any processes waiting in the asoc's wait queue in GFP_ATOMIC);
* sctp_wait_for_connect() or sctp_wait_for_sndbuf(). break;
*/
if (waitqueue_active(&asoc->wait))
wake_up_interruptible(&asoc->wait);
/* Wake up any processes waiting in the sk's sleep queue of default:
* a TCP-style or UDP-style peeled-off socket in printk(KERN_WARNING "Impossible command: %u, %p\n",
* sctp_wait_for_accept() or sctp_wait_for_packet(). cmd->verb, cmd->obj.ptr);
* For a UDP-style socket, the waiters are woken up by the break;
* notifications. };
*/ if (error)
if (SCTP_SOCKET_UDP != sp->type) return error;
sk->state_change(sk);
} }
/* Change the sk->state of a TCP-style socket that has sucessfully return error;
* completed a connect() call.
*/ nomem:
if ((SCTP_STATE_ESTABLISHED == asoc->state) && error = -ENOMEM;
(SCTP_SOCKET_TCP == sp->type) && (SCTP_SS_CLOSED == sk->state)) return error;
sk->state = SCTP_SS_ESTABLISHED;
} }
net/sctp/sm_statefuns.c
View file @ 381a2af8
...@@ -191,14 +191,9 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const sctp_endpoint_t *ep, ...@@ -191,14 +191,9 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const sctp_endpoint_t *ep,
sctp_chunk_t *err_chunk; sctp_chunk_t *err_chunk;
struct sctp_packet *packet; struct sctp_packet *packet;
sctp_unrecognized_param_t *unk_param; sctp_unrecognized_param_t *unk_param;
struct sock *sk;
int len; int len;
/* If the packet is an OOTB packet which is temporarily on the
* control endpoint, respond with an ABORT.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep)
return sctp_sf_ootb(ep, asoc, type, arg, commands);
/* 6.10 Bundling /* 6.10 Bundling
* An endpoint MUST NOT bundle INIT, INIT ACK or * An endpoint MUST NOT bundle INIT, INIT ACK or
* SHUTDOWN COMPLETE with any other chunks. * SHUTDOWN COMPLETE with any other chunks.
...@@ -206,6 +201,22 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const sctp_endpoint_t *ep, ...@@ -206,6 +201,22 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const sctp_endpoint_t *ep,
if (!chunk->singleton) if (!chunk->singleton)
return SCTP_DISPOSITION_VIOLATION; return SCTP_DISPOSITION_VIOLATION;
/* If the packet is an OOTB packet which is temporarily on the
* control endpoint, respond with an ABORT.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep)
return sctp_sf_tabort_8_4_8(ep, asoc, type, arg, commands);
sk = ep->base.sk;
/* If the endpoint is not listening or if the number of associations
* on the TCP-style socket exceed the max backlog, respond with an
* ABORT.
*/
if ((SCTP_SS_LISTENING != sk->state) ||
((SCTP_SOCKET_TCP == sctp_sk(sk)->type) &&
(sk->ack_backlog >= sk->max_ack_backlog)))
return sctp_sf_tabort_8_4_8(ep, asoc, type, arg, commands);
/* Verify the INIT chunk before processing it. */ /* Verify the INIT chunk before processing it. */
err_chunk = NULL; err_chunk = NULL;
if (!sctp_verify_init(asoc, chunk->chunk_hdr->type, if (!sctp_verify_init(asoc, chunk->chunk_hdr->type,
...@@ -729,7 +740,8 @@ sctp_disposition_t sctp_sf_sendbeat_8_3(const sctp_endpoint_t *ep, ...@@ -729,7 +740,8 @@ sctp_disposition_t sctp_sf_sendbeat_8_3(const sctp_endpoint_t *ep,
if (asoc->overall_error_count >= asoc->overall_error_threshold) { if (asoc->overall_error_count >= asoc->overall_error_threshold) {
/* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */ /* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
...@@ -1379,7 +1391,8 @@ static sctp_disposition_t sctp_sf_do_dupcook_a(const sctp_endpoint_t *ep, ...@@ -1379,7 +1391,8 @@ static sctp_disposition_t sctp_sf_do_dupcook_a(const sctp_endpoint_t *ep,
peer_init = &chunk->subh.cookie_hdr->c.peer_init[0]; peer_init = &chunk->subh.cookie_hdr->c.peer_init[0];
if (!sctp_process_init(new_asoc, chunk->chunk_hdr->type, if (!sctp_process_init(new_asoc, chunk->chunk_hdr->type,
sctp_source(chunk), peer_init, GFP_ATOMIC)) sctp_source(chunk), peer_init,
GFP_ATOMIC))
goto nomem; goto nomem;
/* Make sure no new addresses are being added during the /* Make sure no new addresses are being added during the
...@@ -1444,7 +1457,8 @@ static sctp_disposition_t sctp_sf_do_dupcook_b(const sctp_endpoint_t *ep, ...@@ -1444,7 +1457,8 @@ static sctp_disposition_t sctp_sf_do_dupcook_b(const sctp_endpoint_t *ep,
*/ */
peer_init = &chunk->subh.cookie_hdr->c.peer_init[0]; peer_init = &chunk->subh.cookie_hdr->c.peer_init[0];
if (!sctp_process_init(new_asoc, chunk->chunk_hdr->type, if (!sctp_process_init(new_asoc, chunk->chunk_hdr->type,
sctp_source(chunk), peer_init, GFP_ATOMIC)) sctp_source(chunk), peer_init,
GFP_ATOMIC))
goto nomem; goto nomem;
/* Update the content of current association. */ /* Update the content of current association. */
...@@ -1772,14 +1786,16 @@ sctp_disposition_t sctp_sf_cookie_echoed_err(const sctp_endpoint_t *ep, ...@@ -1772,14 +1786,16 @@ sctp_disposition_t sctp_sf_cookie_echoed_err(const sctp_endpoint_t *ep,
sctp_chunk_t *chunk = arg; sctp_chunk_t *chunk = arg;
sctp_errhdr_t *err; sctp_errhdr_t *err;
err = (sctp_errhdr_t *)(chunk->skb->data);
/* If we have gotten too many failures, give up. */ /* If we have gotten too many failures, give up. */
if (1 + asoc->counters[SCTP_COUNTER_INIT_ERROR] > if (1 + asoc->counters[SCTP_COUNTER_INIT_ERROR] >
asoc->max_init_attempts) { asoc->max_init_attempts) {
/* INIT_FAILED will issue an ulpevent. */ /* INIT_FAILED will issue an ulpevent. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(err->cause));
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
} }
err = (sctp_errhdr_t *)(chunk->skb->data);
/* Process the error here */ /* Process the error here */
switch (err->cause) { switch (err->cause) {
...@@ -1834,7 +1850,8 @@ sctp_disposition_t sctp_sf_do_5_2_6_stale(const sctp_endpoint_t *ep, ...@@ -1834,7 +1850,8 @@ sctp_disposition_t sctp_sf_do_5_2_6_stale(const sctp_endpoint_t *ep,
attempts = asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1; attempts = asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1;
if (attempts >= asoc->max_init_attempts) { if (attempts >= asoc->max_init_attempts) {
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(SCTP_ERROR_STALE_COOKIE));
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
} }
...@@ -1936,12 +1953,18 @@ sctp_disposition_t sctp_sf_do_9_1_abort(const sctp_endpoint_t *ep, ...@@ -1936,12 +1953,18 @@ sctp_disposition_t sctp_sf_do_9_1_abort(const sctp_endpoint_t *ep,
sctp_cmd_seq_t *commands) sctp_cmd_seq_t *commands)
{ {
sctp_chunk_t *chunk = arg; sctp_chunk_t *chunk = arg;
__u16 error = SCTP_ERROR_NO_ERROR;
if (!sctp_vtag_verify_either(chunk, asoc)) if (!sctp_vtag_verify_either(chunk, asoc))
return sctp_sf_pdiscard(ep, asoc, type, arg, commands); return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
if (chunk && (ntohs(chunk->chunk_hdr->length) >=
(sizeof(struct sctp_chunkhdr) +
sizeof(struct sctp_errhdr))))
error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
/* ASSOC_FAILED will DELETE_TCB. */ /* ASSOC_FAILED will DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(error));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
...@@ -1961,6 +1984,7 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const sctp_endpoint_t *ep, ...@@ -1961,6 +1984,7 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const sctp_endpoint_t *ep,
sctp_cmd_seq_t *commands) sctp_cmd_seq_t *commands)
{ {
sctp_chunk_t *chunk = arg; sctp_chunk_t *chunk = arg;
__u16 error = SCTP_ERROR_NO_ERROR;
if (!sctp_vtag_verify_either(chunk, asoc)) if (!sctp_vtag_verify_either(chunk, asoc))
return sctp_sf_pdiscard(ep, asoc, type, arg, commands); return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
...@@ -1971,10 +1995,14 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const sctp_endpoint_t *ep, ...@@ -1971,10 +1995,14 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const sctp_endpoint_t *ep,
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT)); SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT));
if (chunk && (ntohs(chunk->chunk_hdr->length) >=
(sizeof(struct sctp_chunkhdr) +
sizeof(struct sctp_errhdr))))
error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
/* CMD_INIT_FAILED will DELETE_TCB. */ /* CMD_INIT_FAILED will DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(error));
/* BUG? This does not look complete... */
return SCTP_DISPOSITION_ABORT; return SCTP_DISPOSITION_ABORT;
} }
...@@ -2381,7 +2409,8 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const sctp_endpoint_t *ep, ...@@ -2381,7 +2409,8 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const sctp_endpoint_t *ep,
* processing the rest of the chunks in the packet. * processing the rest of the chunks in the packet.
*/ */
sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL());
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_DATA));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
return SCTP_DISPOSITION_CONSUME; return SCTP_DISPOSITION_CONSUME;
...@@ -2596,7 +2625,8 @@ sctp_disposition_t sctp_sf_eat_data_fast_4_4(const sctp_endpoint_t *ep, ...@@ -2596,7 +2625,8 @@ sctp_disposition_t sctp_sf_eat_data_fast_4_4(const sctp_endpoint_t *ep,
* processing the rest of the chunks in the packet. * processing the rest of the chunks in the packet.
*/ */
sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL());
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_DATA));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
return SCTP_DISPOSITION_CONSUME; return SCTP_DISPOSITION_CONSUME;
...@@ -3547,7 +3577,8 @@ sctp_disposition_t sctp_sf_do_9_1_prm_abort(const sctp_endpoint_t *ep, ...@@ -3547,7 +3577,8 @@ sctp_disposition_t sctp_sf_do_9_1_prm_abort(const sctp_endpoint_t *ep,
*/ */
/* Delete the established association. */ /* Delete the established association. */
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_USER_ABORT));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
...@@ -3686,7 +3717,8 @@ sctp_disposition_t sctp_sf_cookie_wait_prm_abort(const sctp_endpoint_t *ep, ...@@ -3686,7 +3717,8 @@ sctp_disposition_t sctp_sf_cookie_wait_prm_abort(const sctp_endpoint_t *ep,
*/ */
/* Delete the established association. */ /* Delete the established association. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(SCTP_ERROR_USER_ABORT));
return retval; return retval;
} }
...@@ -4012,7 +4044,8 @@ sctp_disposition_t sctp_sf_do_6_3_3_rtx(const sctp_endpoint_t *ep, ...@@ -4012,7 +4044,8 @@ sctp_disposition_t sctp_sf_do_6_3_3_rtx(const sctp_endpoint_t *ep,
if (asoc->overall_error_count >= asoc->overall_error_threshold) { if (asoc->overall_error_count >= asoc->overall_error_threshold) {
/* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */ /* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
...@@ -4147,7 +4180,8 @@ sctp_disposition_t sctp_sf_t1_timer_expire(const sctp_endpoint_t *ep, ...@@ -4147,7 +4180,8 @@ sctp_disposition_t sctp_sf_t1_timer_expire(const sctp_endpoint_t *ep,
SCTP_TO(timer)); SCTP_TO(timer));
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl)); sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl));
} else { } else {
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
} }
...@@ -4181,7 +4215,8 @@ sctp_disposition_t sctp_sf_t2_timer_expire(const sctp_endpoint_t *ep, ...@@ -4181,7 +4215,8 @@ sctp_disposition_t sctp_sf_t2_timer_expire(const sctp_endpoint_t *ep,
SCTP_DEBUG_PRINTK("Timer T2 expired.\n"); SCTP_DEBUG_PRINTK("Timer T2 expired.\n");
if (asoc->overall_error_count >= asoc->overall_error_threshold) { if (asoc->overall_error_count >= asoc->overall_error_threshold) {
/* Note: CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */ /* Note: CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
SCTP_INC_STATS(SctpAborteds); SCTP_INC_STATS(SctpAborteds);
SCTP_DEC_STATS(SctpCurrEstab); SCTP_DEC_STATS(SctpCurrEstab);
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
...@@ -4244,7 +4279,8 @@ sctp_disposition_t sctp_sf_t5_timer_expire(const sctp_endpoint_t *ep, ...@@ -4244,7 +4279,8 @@ sctp_disposition_t sctp_sf_t5_timer_expire(const sctp_endpoint_t *ep,
goto nomem; goto nomem;
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(reply)); sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(reply));
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
return SCTP_DISPOSITION_DELETE_TCB; return SCTP_DISPOSITION_DELETE_TCB;
nomem: nomem:
......
net/sctp/socket.c
View file @ 381a2af8
...@@ -244,9 +244,6 @@ SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) ...@@ -244,9 +244,6 @@ SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
if (!snum) if (!snum)
snum = inet_sk(sk)->num; snum = inet_sk(sk)->num;
/* Add the address to the bind address list. */ /* Add the address to the bind address list. */
sctp_local_bh_disable(); sctp_local_bh_disable();
sctp_write_lock(&ep->base.addr_lock); sctp_write_lock(&ep->base.addr_lock);
...@@ -257,7 +254,6 @@ SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) ...@@ -257,7 +254,6 @@ SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
addr->v4.sin_port = htons(addr->v4.sin_port); addr->v4.sin_port = htons(addr->v4.sin_port);
if (!ret && !bp->port) if (!ret && !bp->port)
bp->port = snum; bp->port = snum;
sctp_write_unlock(&ep->base.addr_lock); sctp_write_unlock(&ep->base.addr_lock);
sctp_local_bh_enable(); sctp_local_bh_enable();
...@@ -2750,6 +2746,9 @@ int sctp_inet_listen(struct socket *sock, int backlog) ...@@ -2750,6 +2746,9 @@ int sctp_inet_listen(struct socket *sock, int backlog)
err = -EINVAL; err = -EINVAL;
if (sock->state != SS_UNCONNECTED) if (sock->state != SS_UNCONNECTED)
goto out; goto out;
if (unlikely(backlog < 0))
goto out;
switch (sock->type) { switch (sock->type) {
case SOCK_SEQPACKET: case SOCK_SEQPACKET:
err = sctp_seqpacket_listen(sk, backlog); err = sctp_seqpacket_listen(sk, backlog);
...@@ -3152,7 +3151,10 @@ static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, ...@@ -3152,7 +3151,10 @@ static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr,
return -EINVAL; return -EINVAL;
/* Is this a valid SCTP address? */ /* Is this a valid SCTP address? */
if (!af->addr_valid((union sctp_addr *)addr)) if (!af->addr_valid(addr))
return -EINVAL;
if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr)))
return -EINVAL; return -EINVAL;
return 0; return 0;
......
net/sctp/ulpevent.c
View file @ 381a2af8
...@@ -628,6 +628,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(sctp_association_t *asoc, ...@@ -628,6 +628,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(sctp_association_t *asoc,
if (!event) if (!event)
goto fail_init; goto fail_init;
event->iif = sctp_chunk_iif(chunk);
/* Note: Not clearing the entire event struct as /* Note: Not clearing the entire event struct as
* this is just a fragment of the real event. However, * this is just a fragment of the real event. However,
* we still need to do rwnd accounting. * we still need to do rwnd accounting.
......
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