Commit f51b15cd authored by Sridhar Samudrala's avatar Sridhar Samudrala

Merge us.ibm.com:/home/sridhar/BK/linux-2.5.59

into us.ibm.com:/home/sridhar/BK/lksctp-2.5.59
parents 6a3354a9 ea393c93
......@@ -56,8 +56,10 @@
#include <linux/ipv6.h> /* For ipv6hdr. */
#include <net/sctp/user.h>
/* What a hack! Jiminy Cricket! */
enum { SCTP_MAX_STREAM = 10 };
/* Value used for stream negotiation. */
enum { SCTP_MAX_STREAM = 0xffff };
enum { SCTP_DEFAULT_OUTSTREAMS = 10 };
enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM };
/* Define the amount of space to reserve for SCTP, IP, LL.
* There is a little bit of waste that we are always allocating
......
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001-2002 International Business Machines, Corp.
* Copyright (c) 2001 Intel Corp.
* Copyright (c) 2001-2003 International Business Machines, Corp.
* Copyright (c) 2001-2003 Intel Corp.
*
* This file is part of the SCTP kernel reference Implementation
*
......@@ -36,7 +36,9 @@
* La Monte H.P. Yarroll <piggy@acm.org>
* Xingang Guo <xingang.guo@intel.com>
* Jon Grimm <jgrimm@us.ibm.com>
* Daisy Chang <daisyc@us.ibm.com>
* Daisy Chang <daisyc@us.ibm.com>
* Sridhar Samudrala <sri@us.ibm.com>
* Ardelle Fan <ardelle.fan@intel.com>
*
* Any bugs reported given to us we will try to fix... any fixes shared will
* be incorporated into the next SCTP release.
......@@ -147,7 +149,9 @@ extern int sctp_primitive_REQUESTHEARTBEAT(sctp_association_t *, void *arg);
/*
* sctp_crc32c.c
*/
extern __u32 count_crc(__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_end_cksum(__u32 cksum);
/*
* sctp_input.c
......@@ -266,6 +270,7 @@ extern atomic_t sctp_dbg_objcnt_transport;
extern atomic_t sctp_dbg_objcnt_chunk;
extern atomic_t sctp_dbg_objcnt_bind_addr;
extern atomic_t sctp_dbg_objcnt_addr;
extern atomic_t sctp_dbg_objcnt_ssnmap;
/* Macros to atomically increment/decrement objcnt counters. */
#define SCTP_DBG_OBJCNT_INC(name) \
......@@ -418,6 +423,23 @@ static inline size_t get_user_iov_size(struct iovec *iov, int iovlen)
return retval;
}
/* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
static inline __s32 sctp_jitter(__u32 rto)
{
static __u32 sctp_rand;
__s32 ret;
sctp_rand += jiffies;
sctp_rand ^= (sctp_rand << 12);
sctp_rand ^= (sctp_rand >> 20);
/* Choose random number from 0 to rto, then move to -50% ~ +50%
* of rto.
*/
ret = sctp_rand % rto - (rto >> 1);
return ret;
}
/* Walk through a list of TLV parameters. Don't trust the
* individual parameter lengths and instead depend on
* the chunk length to indicate when to stop. Make sure
......
......@@ -269,6 +269,7 @@ sctp_chunk_t *sctp_make_op_error(const sctp_association_t *,
const void *payload,
size_t paylen);
void sctp_chunk_assign_tsn(sctp_chunk_t *);
void sctp_chunk_assign_ssn(sctp_chunk_t *);
/* Prototypes for statetable processing. */
......
This diff is collapsed.
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001 International Business Machines, Corp.
* Copyright (c) 2001-2003 International Business Machines, Corp.
* Copyright (c) 2001 Intel Corp.
* Copyright (c) 2001 Nokia, Inc.
* Copyright (c) 2001 La Monte H.P. Yarroll
*
* These are the definitions needed for the sctp_ulpqueue type. The
* sctp_ulpqueue is the interface between the Upper Layer Protocol, or ULP,
*
* These are the definitions needed for the sctp_ulpq type. The
* sctp_ulpq is the interface between the Upper Layer Protocol, or ULP,
* and the core SCTP state machine. This is the component which handles
* reassembly and ordering.
*
* The SCTP reference implementation is free software;
* you can redistribute it and/or modify it under the terms of
* reassembly and ordering.
*
* The SCTP reference implementation is free software;
* you can redistribute it and/or modify it under the terms of
* the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* the SCTP reference implementation is distributed in the hope that it
*
* the SCTP reference implementation is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* ************************
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
*
* You should have received a copy of the GNU General Public License
* along with GNU CC; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Please send any bug reports or fixes you make to one of the
* following email addresses:
*
* Jon Grimm <jgrimm@us.ibm.com>
* La Monte H.P. Yarroll <piggy@acm.org>
*
* Boston, MA 02111-1307, USA.
*
* Please send any bug reports or fixes you make to the
* email addresses:
* lksctp developers <lksctp-developers@lists.sourceforge.net>
*
* Or submit a bug report through the following website:
* http://www.sf.net/projects/lksctp
*
* Written or modified by:
* Jon Grimm <jgrimm@us.ibm.com>
* La Monte H.P. Yarroll <piggy@acm.org>
*
* Any bugs reported given to us we will try to fix... any fixes shared will
* be incorporated into the next SCTP release.
*/
......@@ -42,46 +47,26 @@
#define __sctp_ulpqueue_h__
/* A structure to carry information to the ULP (e.g. Sockets API) */
typedef struct sctp_ulpqueue {
struct sctp_ulpq {
int malloced;
spinlock_t lock;
sctp_association_t *asoc;
struct sk_buff_head reasm;
struct sk_buff_head lobby;
__u16 ssn[0];
} sctp_ulpqueue_t;
/* This macro assists in creation of external storage for variable length
* internal buffers.
*/
#define sctp_ulpqueue_storage_size(inbound) (sizeof(__u16) * (inbound))
sctp_ulpqueue_t *sctp_ulpqueue_new(sctp_association_t *asoc,
__u16 inbound,
int priority);
sctp_ulpqueue_t *sctp_ulpqueue_init(sctp_ulpqueue_t *ulpq,
sctp_association_t *asoc,
__u16 inbound);
void sctp_ulpqueue_free(sctp_ulpqueue_t *);
};
/* Prototypes. */
struct sctp_ulpq *sctp_ulpq_new(sctp_association_t *asoc, int priority);
struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *, sctp_association_t *);
void sctp_ulpq_free(struct sctp_ulpq *);
/* Add a new DATA chunk for processing. */
int sctp_ulpqueue_tail_data(sctp_ulpqueue_t *,
sctp_chunk_t *chunk,
int priority);
int sctp_ulpq_tail_data(struct sctp_ulpq *, sctp_chunk_t *chunk, int priority);
/* Add a new event for propogation to the ULP. */
int sctp_ulpqueue_tail_event(sctp_ulpqueue_t *,
sctp_ulpevent_t *event);
int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev);
/* Is the ulpqueue empty. */
int sctp_ulpqueue_is_empty(sctp_ulpqueue_t *);
int sctp_ulpqueue_is_data_empty(sctp_ulpqueue_t *);
int sctp_ulpqueue_is_empty(struct sctp_ulpq *);
#endif /* __sctp_ulpqueue_h__ */
......@@ -90,4 +75,4 @@ int sctp_ulpqueue_is_data_empty(sctp_ulpqueue_t *);
......@@ -100,6 +100,14 @@ enum sctp_optname {
#define SCTP_SOCKOPT_BINDX_REM SCTP_SOCKOPT_BINDX_REM
SCTP_SOCKOPT_PEELOFF, /* peel off association. */
#define SCTP_SOCKOPT_PEELOFF SCTP_SOCKOPT_PEELOFF
SCTP_GET_PEER_ADDRS_NUM, /* Get number of peer addresss. */
#define SCTP_GET_PEER_ADDRS_NUM SCTP_GET_PEER_ADDRS_NUM
SCTP_GET_PEER_ADDRS, /* Get all peer addresss. */
#define SCTP_GET_PEER_ADDRS SCTP_GET_PEER_ADDRS
SCTP_GET_LOCAL_ADDRS_NUM, /* Get number of local addresss. */
#define SCTP_GET_LOCAL_ADDRS_NUM SCTP_GET_LOCAL_ADDRS_NUM
SCTP_GET_LOCAL_ADDRS, /* Get all local addresss. */
#define SCTP_GET_LOCAL_ADDRS SCTP_GET_LOCAL_ADDRS
};
......@@ -576,6 +584,15 @@ struct sctp_setstrm_timeout {
__u16 ssto_streamid_end;
};
/*
* 8.3 8.5 get all peer/local addresses on a socket
* This parameter struct is for getsockopt
*/
struct sctp_getaddrs {
sctp_assoc_t assoc_id;
int addr_num;
struct sockaddr_storage *addrs;
};
/* These are bit fields for msghdr->msg_flags. See section 5.1. */
/* On user space Linux, these live in <bits/socket.h> as an enum. */
......
......@@ -10,7 +10,7 @@ sctp-y := sm_statetable.o sm_statefuns.o sm_sideeffect.o \
inqueue.o outqueue.o ulpqueue.o command.o \
tsnmap.o bind_addr.o socket.o primitive.o \
output.o input.o hashdriver.o sla1.o \
debug.o
debug.o ssnmap.o
ifeq ($(CONFIG_SCTP_ADLER32), y)
sctp-y += adler32.o
......
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2003 International Business Machines, Corp.
*
* This file is part of the SCTP kernel reference Implementation
*
......@@ -36,6 +37,7 @@
* Randall Stewart <rstewar1@email.mot.com>
* Ken Morneau <kmorneau@cisco.com>
* Qiaobing Xie <qxie1@email.mot.com>
* Sridhar Samudrala <sri@us.ibm.com>
*
* Any bugs reported given to us we will try to fix... any fixes shared will
* be incorporated into the next SCTP release.
......@@ -122,7 +124,7 @@ unsigned long update_adler32(unsigned long adler,
return (s2 << 16) + s1;
}
__u32 count_crc(__u8 *ptr, __u16 count)
__u32 sctp_start_cksum(__u8 *ptr, __u16 count)
{
/*
* Update a running Adler-32 checksum with the bytes
......@@ -146,3 +148,15 @@ __u32 count_crc(__u8 *ptr, __u16 count)
return adler;
}
__u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 adler)
{
adler = update_adler32(adler, ptr, count);
return adler;
}
__u32 sctp_end_cksum(__u32 adler)
{
return adler;
}
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001-2002 International Business Machines Corp.
* Copyright (c) 2001-2003 International Business Machines Corp.
* Copyright (c) 2001 Intel Corp.
* Copyright (c) 2001 La Monte H.P. Yarroll
*
......@@ -166,15 +166,10 @@ sctp_association_t *sctp_association_init(sctp_association_t *asoc,
asoc->max_init_attempts = sp->initmsg.sinit_max_attempts;
asoc->max_init_timeo = sp->initmsg.sinit_max_init_timeo * HZ;
/* RFC 2960 6.5 Stream Identifier and Stream Sequence Number
*
* The stream sequence number in all the streams shall start
* from 0 when the association is established. Also, when the
* stream sequence number reaches the value 65535 the next
* stream sequence number shall be set to 0.
/* Allocate storage for the ssnmap after the inbound and outbound
* streams have been negotiated during Init.
*/
for (i = 0; i < SCTP_MAX_STREAM; i++)
asoc->ssn[i] = 0;
asoc->ssnmap = NULL;
/* Set the local window size for receive.
* This is also the rcvbuf space per association.
......@@ -252,15 +247,15 @@ sctp_association_t *sctp_association_init(sctp_association_t *asoc,
asoc);
/* Create an output queue. */
sctp_outqueue_init(asoc, &asoc->outqueue);
sctp_outqueue_set_output_handlers(&asoc->outqueue,
sctp_packet_init,
sctp_packet_config,
sctp_packet_append_chunk,
sctp_packet_transmit_chunk,
sctp_packet_transmit);
if (NULL == sctp_ulpqueue_init(&asoc->ulpq, asoc, SCTP_MAX_STREAM))
sctp_outq_init(asoc, &asoc->outqueue);
sctp_outq_set_output_handlers(&asoc->outqueue,
sctp_packet_init,
sctp_packet_config,
sctp_packet_append_chunk,
sctp_packet_transmit_chunk,
sctp_packet_transmit);
if (NULL == sctp_ulpq_init(&asoc->ulpq, asoc))
goto fail_init;
/* Set up the tsn tracking. */
......@@ -310,14 +305,17 @@ void sctp_association_free(sctp_association_t *asoc)
asoc->base.dead = 1;
/* Dispose of any data lying around in the outqueue. */
sctp_outqueue_free(&asoc->outqueue);
sctp_outq_free(&asoc->outqueue);
/* Dispose of any pending messages for the upper layer. */
sctp_ulpqueue_free(&asoc->ulpq);
sctp_ulpq_free(&asoc->ulpq);
/* Dispose of any pending chunks on the inqueue. */
sctp_inqueue_free(&asoc->base.inqueue);
/* Free ssnmap storage. */
sctp_ssnmap_free(asoc->ssnmap);
/* Clean up the bound address list. */
sctp_bind_addr_free(&asoc->base.bind_addr);
......@@ -524,7 +522,7 @@ void sctp_assoc_control_transport(sctp_association_t *asoc,
break;
default:
BUG();
return;
};
/* Generate and send a SCTP_PEER_ADDR_CHANGE notification to the
......@@ -534,7 +532,7 @@ void sctp_assoc_control_transport(sctp_association_t *asoc,
(struct sockaddr_storage *) &transport->ipaddr,
0, spc_state, error, GFP_ATOMIC);
if (event)
sctp_ulpqueue_tail_event(&asoc->ulpq, event);
sctp_ulpq_tail_event(&asoc->ulpq, event);
/* Select new active and retran paths. */
......@@ -634,7 +632,7 @@ __u32 __sctp_association_get_tsn_block(sctp_association_t *asoc, int num)
/* Fetch the next Stream Sequence Number for stream number 'sid'. */
__u16 __sctp_association_get_next_ssn(sctp_association_t *asoc, __u16 sid)
{
return asoc->ssn[sid]++;
return sctp_ssn_next(&asoc->ssnmap->out, sid);
}
/* Compare two addresses to see if they match. Wildcard addresses
......@@ -852,8 +850,6 @@ void sctp_assoc_migrate(sctp_association_t *assoc, struct sock *newsk)
/* Update an association (possibly from unexpected COOKIE-ECHO processing). */
void sctp_assoc_update(sctp_association_t *asoc, sctp_association_t *new)
{
int i;
/* Copy in new parameters of peer. */
asoc->c = new->c;
asoc->peer.rwnd = new->peer.rwnd;
......@@ -872,23 +868,28 @@ void sctp_assoc_update(sctp_association_t *asoc, sctp_association_t *new)
/* If the case is A (association restart), use
* initial_tsn as next_tsn. If the case is B, use
* current next_tsn in case there is data sent to peer
* current next_tsn in case data sent to peer
* has been discarded and needs retransmission.
*/
if (SCTP_STATE_ESTABLISHED == asoc->state) {
asoc->next_tsn = new->next_tsn;
asoc->ctsn_ack_point = new->ctsn_ack_point;
/* Reinitialize SSN for both local streams
* and peer's streams.
*/
for (i = 0; i < SCTP_MAX_STREAM; i++) {
asoc->ssn[i] = 0;
asoc->ulpq.ssn[i] = 0;
}
sctp_ssnmap_clear(asoc->ssnmap);
} else {
asoc->ctsn_ack_point = asoc->next_tsn - 1;
if (!asoc->ssnmap) {
/* Move the ssnmap. */
asoc->ssnmap = new->ssnmap;
new->ssnmap = NULL;
}
}
}
/* Choose the transport for sending a shutdown packet.
......
......@@ -47,8 +47,8 @@ sctp_cmd_seq_t *sctp_new_cmd_seq(int priority)
{
sctp_cmd_seq_t *retval = t_new(sctp_cmd_seq_t, priority);
/* XXX Check for NULL? -DaveM */
sctp_init_cmd_seq(retval);
if (retval)
sctp_init_cmd_seq(retval);
return retval;
}
......
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001 International Business Machines, Corp.
* Copyright (c) 2001-2003 International Business Machines, Corp.
*
* This file is part of the SCTP kernel reference Implementation
*
......@@ -33,6 +33,7 @@
* Written or modified by:
* Dinakaran Joseph
* Jon Grimm <jgrimm@us.ibm.com>
* Sridhar Samudrala <sri@us.ibm.com>
*
* Any bugs reported given to us we will try to fix... any fixes shared will
* be incorporated into the next SCTP release.
......@@ -135,11 +136,10 @@ __u32 crc_c[256] = {
0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351,
};
__u32 count_crc(__u8 *buffer, __u16 length)
__u32 sctp_start_cksum(__u8 *buffer, __u16 length)
{
__u32 crc32 = ~(__u32) 0;
__u32 i, result;
__u8 byte0, byte1, byte2, byte3;
__u32 i;
/* Optimize this routine to be SCTP specific, knowing how
* to skip the checksum field of the SCTP header.
......@@ -157,6 +157,24 @@ __u32 count_crc(__u8 *buffer, __u16 length)
for (i = sizeof(struct sctphdr); i < length ; i++)
CRC32C(crc32, buffer[i]);
return crc32;
}
__u32 sctp_update_cksum(__u8 *buffer, __u16 length, __u32 crc32)
{
__u32 i;
for (i = 0; i < length ; i++)
CRC32C(crc32, buffer[i]);
return crc32;
}
__u32 sctp_end_cksum(__u32 crc32)
{
__u32 result;
__u8 byte0, byte1, byte2, byte3;
result = ~crc32;
/* result now holds the negated polynomial remainder;
......@@ -183,5 +201,3 @@ __u32 count_crc(__u8 *buffer, __u16 length)
byte3);
return crc32;
}
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001 International Business Machines, Corp.
* Copyright (c) 2001-2003 International Business Machines, Corp.
* Copyright (c) 2001 Intel Corp.
* Copyright (c) 2001 Nokia, Inc.
* Copyright (c) 2001 La Monte H.P. Yarroll
......@@ -72,10 +72,19 @@ static inline int sctp_rcv_checksum(struct sk_buff *skb)
{
struct sctphdr *sh;
__u32 cmp, val;
struct sk_buff *list = skb_shinfo(skb)->frag_list;
sh = (struct sctphdr *) skb->h.raw;
cmp = ntohl(sh->checksum);
val = count_crc((__u8 *)sh, skb->len);
val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
for (; list; list = list->next)
val = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
val);
val = sctp_end_cksum(val);
if (val != cmp) {
/* CRC failure, dump it. */
return -1;
......
......@@ -113,14 +113,14 @@ static inline int sctp_v6_xmit(struct sk_buff *skb)
/* FIXME: Currently, ip6_route_output() doesn't fill in the source
* address in the returned route entry. So we call ipv6_get_saddr()
* to get an appropriate source address. It is possible that this address
* may not be part of the bind address list of the association.
* to get an appropriate source address. It is possible that this
* address may not be part of the bind address list of the association.
* Once ip6_route_ouput() is fixed so that it returns a route entry
* with an appropriate source address, the following if condition can
* be removed. With ip6_route_output() returning a source address filled
* route entry, sctp_transport_route() can do real source address
* selection for v6.
*/
* be removed. With ip6_route_output() returning a source address
* filled route entry, sctp_transport_route() can do real source
* address selection for v6.
*/
if (ipv6_addr_any(&rt6->rt6i_src.addr)) {
err = ipv6_get_saddr(dst, fl.fl6_dst, &saddr);
......@@ -130,7 +130,6 @@ static inline int sctp_v6_xmit(struct sk_buff *skb)
__FUNCTION__, NIP6(fl.fl6_src));
return err;
}
fl.fl6_src = &saddr;
} else {
fl.fl6_src = &rt6->rt6i_src.addr;
......@@ -572,7 +571,7 @@ int sctp_v6_init(void)
/* Register the SCTP specfic AF_INET6 functions. */
sctp_register_af(&sctp_ipv6_specific);
/* Register notifier for inet6 address additions/deletions. */
/* Register notifier for inet6 address additions/deletions. */
register_inet6addr_notifier(&sctp_inetaddr_notifier);
return 0;
......
......@@ -54,6 +54,7 @@ SCTP_DBG_OBJCNT(assoc);
SCTP_DBG_OBJCNT(bind_addr);
SCTP_DBG_OBJCNT(chunk);
SCTP_DBG_OBJCNT(addr);
SCTP_DBG_OBJCNT(ssnmap);
/* An array to make it easy to pretty print the debug information
* to the proc fs.
......@@ -66,6 +67,7 @@ sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
SCTP_DBG_OBJCNT_ENTRY(chunk),
SCTP_DBG_OBJCNT_ENTRY(bind_addr),
SCTP_DBG_OBJCNT_ENTRY(addr),
SCTP_DBG_OBJCNT_ENTRY(ssnmap),
};
/* Callback from procfs to read out objcount information.
......
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001 International Business Machines, Corp.
* Copyright (c) 2001-2003 International Business Machines, Corp.
*
* This file is part of the SCTP kernel reference Implementation
*
......@@ -62,7 +62,6 @@
#include <net/sctp/sm.h>
/* Forward declarations for private helpers. */
__u32 count_crc(__u8 *ptr, __u16 count);
static void sctp_packet_reset(sctp_packet_t *packet);
static sctp_xmit_t sctp_packet_append_data(sctp_packet_t *packet,
sctp_chunk_t *chunk);
......@@ -228,7 +227,7 @@ sctp_xmit_t sctp_packet_append_chunk(sctp_packet_t *packet, sctp_chunk_t *chunk)
}
/* All packets are sent to the network through this function from
* sctp_push_outqueue().
* sctp_outq_tail().
*
* The return value is a normal kernel error return value.
*/
......@@ -358,7 +357,8 @@ int sctp_packet_transmit(sctp_packet_t *packet)
* Note: Adler-32 is no longer applicable, as has been replaced
* by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>.
*/
crc32 = count_crc((__u8 *)sh, nskb->len);
crc32 = sctp_start_cksum((__u8 *)sh, nskb->len);
crc32 = sctp_end_cksum(crc32);
/* 3) Put the resultant value into the checksum field in the
* common header, and leave the rest of the bits unchanged.
......
This diff is collapsed.
......@@ -82,7 +82,7 @@ struct sock *sctp_get_ctl_sock(void)
}
/* Set up the proc fs entry for the SCTP protocol. */
void sctp_proc_init(void)
__init void sctp_proc_init(void)
{
if (!proc_net_sctp) {
struct proc_dir_entry *ent;
......@@ -95,7 +95,7 @@ void sctp_proc_init(void)
}
/* Clean up the proc fs entry for the SCTP protocol. */
void sctp_proc_exit(void)
__exit void sctp_proc_exit(void)
{
if (proc_net_sctp) {
proc_net_sctp = NULL;
......@@ -688,7 +688,7 @@ static void cleanup_sctp_mibs(void)
}
/* Initialize the universe into something sensible. */
int sctp_init(void)
__init int sctp_init(void)
{
int i;
int status = 0;
......@@ -750,13 +750,9 @@ int sctp_init(void)
/* Implementation specific variables. */
/* Initialize default stream count setup information.
* Note: today the stream accounting data structures are very
* fixed size, so one really does need to make sure that these have
* upper/lower limits when changing.
*/
sctp_proto.max_instreams = SCTP_MAX_STREAM;
sctp_proto.max_outstreams = SCTP_MAX_STREAM;
/* Initialize default stream count setup information. */
sctp_proto.max_instreams = SCTP_DEFAULT_INSTREAMS;
sctp_proto.max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
/* Allocate and initialize the association hash table. */
sctp_proto.assoc_hashsize = 4096;
......@@ -852,7 +848,7 @@ int sctp_init(void)
}
/* Exit handler for the SCTP protocol. */
void sctp_exit(void)
__exit void sctp_exit(void)
{
/* BUG. This should probably do something useful like clean
* up all the remaining associations and all that memory.
......@@ -889,4 +885,3 @@ module_exit(sctp_exit);
MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
MODULE_LICENSE("GPL");
......@@ -82,12 +82,12 @@ static const sctp_supported_addrs_param_t sat_param = {
/* gcc 3.2 doesn't allow initialization of zero-length arrays. So the above
* structure is split and the address types array is initialized using a
* fixed length array.
* fixed length array.
*/
static const __u16 sat_addr_types[2] = {
SCTP_PARAM_IPV4_ADDRESS,
SCTP_V6(SCTP_PARAM_IPV6_ADDRESS,)
};
};
/* RFC 2960 3.3.2 Initiation (INIT) (1)
*
......@@ -540,7 +540,7 @@ sctp_chunk_t *sctp_make_datafrag_empty(sctp_association_t *asoc,
dp.stream = htons(sinfo->sinfo_stream);
dp.ppid = htonl(sinfo->sinfo_ppid);
dp.ssn = htons(ssn);
/* Set the flags for an unordered send. */
if (sinfo->sinfo_flags & MSG_UNORDERED)
flags |= SCTP_DATA_UNORDERED;
......@@ -552,7 +552,7 @@ sctp_chunk_t *sctp_make_datafrag_empty(sctp_association_t *asoc,
retval->subh.data_hdr = sctp_addto_chunk(retval, sizeof(dp), &dp);
memcpy(&retval->sinfo, sinfo, sizeof(struct sctp_sndrcvinfo));
nodata:
return retval;
}
......@@ -607,12 +607,12 @@ sctp_chunk_t *sctp_make_data_empty(sctp_association_t *asoc,
* ordered send and a new ssn is generated. The flags field is set
* in the inner routine - sctp_make_datafrag_empty().
*/
if (sinfo->sinfo_flags & MSG_UNORDERED) {
ssn = 0;
} else {
ssn = __sctp_association_get_next_ssn(asoc,
sinfo->sinfo_stream);
}
// if (sinfo->sinfo_flags & MSG_UNORDERED) {
ssn = 0;
// } else {
// ssn = __sctp_association_get_next_ssn(asoc,
// sinfo->sinfo_stream);
// }
return sctp_make_datafrag_empty(asoc, sinfo, data_len, flags, ssn);
}
......@@ -1013,6 +1013,7 @@ sctp_chunk_t *sctp_chunkify(struct sk_buff *skb, const sctp_association_t *asoc,
retval->asoc = (sctp_association_t *) asoc;
retval->num_times_sent = 0;
retval->has_tsn = 0;
retval->has_ssn = 0;
retval->rtt_in_progress = 0;
retval->sent_at = jiffies;
retval->singleton = 1;
......@@ -1214,6 +1215,29 @@ int sctp_user_addto_chunk(sctp_chunk_t *chunk, int len, struct iovec *data)
return err;
}
/* Helper function to assign a TSN if needed. This assumes that both
* the data_hdr and association have already been assigned.
*/
void sctp_chunk_assign_ssn(sctp_chunk_t *chunk)
{
__u16 ssn;
__u16 sid;
if (chunk->has_ssn)
return;
/* This is the last possible instant to assign a SSN. */
if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED) {
ssn = 0;
} else {
sid = htons(chunk->subh.data_hdr->stream);
ssn = htons(__sctp_association_get_next_ssn(chunk->asoc, sid));
}
chunk->subh.data_hdr->ssn = ssn;
chunk->has_ssn = 1;
}
/* Helper function to assign a TSN if needed. This assumes that both
* the data_hdr and association have already been assigned.
*/
......@@ -1654,6 +1678,7 @@ int sctp_verify_init(const sctp_association_t *asoc,
/* Unpack the parameters in an INIT packet into an association.
* Returns 0 on failure, else success.
* FIXME: This is an association method.
*/
int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
const union sctp_addr *peer_addr,
......@@ -1710,6 +1735,12 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
ntohs(peer_init->init_hdr.num_inbound_streams);
}
if (asoc->c.sinit_max_instreams >
ntohs(peer_init->init_hdr.num_outbound_streams)) {
asoc->c.sinit_max_instreams =
ntohs(peer_init->init_hdr.num_outbound_streams);
}
/* Copy Initiation tag from INIT to VT_peer in cookie. */
asoc->c.peer_vtag = asoc->peer.i.init_tag;
......@@ -1738,6 +1769,21 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_SIZE,
asoc->peer.i.initial_tsn);
/* RFC 2960 6.5 Stream Identifier and Stream Sequence Number
*
* The stream sequence number in all the streams shall start
* from 0 when the association is established. Also, when the
* stream sequence number reaches the value 65535 the next
* stream sequence number shall be set to 0.
*/
/* Allocate storage for the negotiated streams. */
asoc->ssnmap = sctp_ssnmap_new(asoc->peer.i.num_outbound_streams,
asoc->c.sinit_num_ostreams,
priority);
if (!asoc->ssnmap)
goto nomem_ssnmap;
/* ADDIP Section 4.1 ASCONF Chunk Procedures
*
* When an endpoint has an ASCONF signaled change to be sent to the
......@@ -1751,6 +1797,7 @@ int sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
asoc->peer.addip_serial = asoc->peer.i.initial_tsn - 1;
return 1;
nomem_ssnmap:
clean_up:
/* Release the transport structures. */
list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {
......
......@@ -296,7 +296,7 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
break;
case SCTP_CMD_PURGE_OUTQUEUE:
sctp_outqueue_teardown(&asoc->outqueue);
sctp_outq_teardown(&asoc->outqueue);
break;
case SCTP_CMD_DELETE_TCB:
......@@ -395,9 +395,9 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
command->obj.ptr,
"ulpq:",
&asoc->ulpq);
sctp_ulpqueue_tail_data(&asoc->ulpq,
command->obj.ptr,
GFP_ATOMIC);
sctp_ulpq_tail_data(&asoc->ulpq,
command->obj.ptr,
GFP_ATOMIC);
break;
case SCTP_CMD_EVENT_ULP:
......@@ -407,14 +407,14 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
command->obj.ptr,
"ulpq:",
&asoc->ulpq);
sctp_ulpqueue_tail_event(&asoc->ulpq,
command->obj.ptr);
sctp_ulpq_tail_event(&asoc->ulpq,
command->obj.ptr);
break;
case SCTP_CMD_REPLY:
/* Send a chunk to our peer. */
error = sctp_push_outqueue(&asoc->outqueue,
command->obj.ptr);
error = sctp_outq_tail(&asoc->outqueue,
command->obj.ptr);
break;
case SCTP_CMD_SEND_PKT:
......@@ -432,7 +432,7 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
case SCTP_CMD_TRANSMIT:
/* Kick start transmission. */
error = sctp_flush_outqueue(&asoc->outqueue, 0);
error = sctp_outq_flush(&asoc->outqueue, 0);
break;
case SCTP_CMD_ECN_CE:
......@@ -599,7 +599,7 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
case SCTP_CMD_RTO_PENDING:
t = command->obj.transport;
t->rto_pending = 1;
t->rto_pending = 1;
break;
default:
......@@ -743,7 +743,7 @@ int sctp_gen_sack(sctp_association_t *asoc, int force, sctp_cmd_seq_t *commands)
asoc->peer.sack_needed = 0;
asoc->peer.next_dup_tsn = 0;
error = sctp_push_outqueue(&asoc->outqueue, sack);
error = sctp_outq_tail(&asoc->outqueue, sack);
/* Stop the SACK timer. */
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
......@@ -1095,7 +1095,7 @@ static void sctp_cmd_assoc_failed(sctp_cmd_seq_t *commands,
/* Process an init chunk (may be real INIT/INIT-ACK or an embedded INIT
* inside the cookie. In reality, this is only used for INIT-ACK processing
* since all other cases use "temporary" associations and can do all
* their work in statefuns directly.
* their work in statefuns directly.
*/
static int sctp_cmd_process_init(sctp_cmd_seq_t *commands,
sctp_association_t *asoc,
......@@ -1134,8 +1134,8 @@ static void sctp_cmd_hb_timers_start(sctp_cmd_seq_t *cmds,
*/
list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, sctp_transport_t, transports);
if (!mod_timer(&t->hb_timer,
t->hb_interval + t->rto + jiffies)) {
if (!mod_timer(&t->hb_timer, t->hb_interval + t->rto +
sctp_jitter(t->rto) + jiffies)) {
sctp_transport_hold(t);
}
}
......@@ -1147,7 +1147,8 @@ static void sctp_cmd_hb_timers_update(sctp_cmd_seq_t *cmds,
sctp_transport_t *t)
{
/* Update the heartbeat timer. */
if (!mod_timer(&t->hb_timer, t->hb_interval + t->rto + jiffies))
if (!mod_timer(&t->hb_timer, t->hb_interval + t->rto +
sctp_jitter(t->rto) + jiffies))
sctp_transport_hold(t);
}
......@@ -1218,7 +1219,7 @@ static int sctp_cmd_process_sack(sctp_cmd_seq_t *cmds,
{
int err;
if (sctp_sack_outqueue(&asoc->outqueue, sackh)) {
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),
......@@ -1228,7 +1229,7 @@ static int sctp_cmd_process_sack(sctp_cmd_seq_t *cmds,
/* Windows may have opened, so we need
* to check if we have DATA to transmit
*/
err = sctp_flush_outqueue(&asoc->outqueue, 0);
err = sctp_outq_flush(&asoc->outqueue, 0);
}
return err;
......
......@@ -191,7 +191,7 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const sctp_endpoint_t *ep,
int len;
/* If the packet is an OOTB packet which is temporarily on the
* control endpoint, responding with an ABORT.
* control endpoint, respond with an ABORT.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep)
return sctp_sf_ootb(ep, asoc, type, arg, commands);
......@@ -506,7 +506,7 @@ sctp_disposition_t sctp_sf_do_5_1D_ce(const sctp_endpoint_t *ep,
sctp_chunk_t *err_chk_p;
/* If the packet is an OOTB packet which is temporarily on the
* control endpoint, responding with an ABORT.
* control endpoint, respond with an ABORT.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep)
return sctp_sf_ootb(ep, asoc, type, arg, commands);
......@@ -1337,7 +1337,7 @@ sctp_disposition_t sctp_sf_do_5_2_2_dupinit(const sctp_endpoint_t *ep,
/* Unexpected COOKIE-ECHO handlerfor peer restart (Table 2, action 'A')
/* Unexpected COOKIE-ECHO handler for peer restart (Table 2, action 'A')
*
* Section 5.2.4
* A) In this case, the peer may have restarted.
......@@ -2030,7 +2030,7 @@ sctp_disposition_t sctp_sf_do_9_2_shutdown(const sctp_endpoint_t *ep,
SCTP_STATE(SCTP_STATE_SHUTDOWN_RECEIVED));
disposition = SCTP_DISPOSITION_CONSUME;
if (sctp_outqueue_is_empty(&asoc->outqueue)) {
if (sctp_outq_is_empty(&asoc->outqueue)) {
disposition = sctp_sf_do_9_2_shutdown_ack(ep, asoc, type,
arg, commands);
}
......@@ -3429,7 +3429,7 @@ sctp_disposition_t sctp_sf_do_9_2_prm_shutdown(const sctp_endpoint_t *ep,
SCTP_TO(SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD));
disposition = SCTP_DISPOSITION_CONSUME;
if (sctp_outqueue_is_empty(&asoc->outqueue)) {
if (sctp_outq_is_empty(&asoc->outqueue)) {
disposition = sctp_sf_do_9_2_start_shutdown(ep, asoc, type,
arg, commands);
}
......@@ -4203,7 +4203,7 @@ sctp_disposition_t sctp_sf_autoclose_timer_expire(const sctp_endpoint_t *ep,
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_START,
SCTP_TO(SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD));
disposition = SCTP_DISPOSITION_CONSUME;
if (sctp_outqueue_is_empty(&asoc->outqueue)) {
if (sctp_outq_is_empty(&asoc->outqueue)) {
disposition = sctp_sf_do_9_2_start_shutdown(ep, asoc, type,
arg, commands);
}
......
......@@ -49,7 +49,7 @@
#include <net/sctp/sctp.h>
#include <net/sctp/sm.h>
sctp_sm_table_entry_t bug = {
static sctp_sm_table_entry_t bug = {
.fn = sctp_sf_bug,
.name = "sctp_sf_bug"
};
......
This diff is collapsed.
/* SCTP kernel reference Implementation
* Copyright (c) 2003 International Business Machines, Corp.
*
* This file is part of the SCTP kernel reference Implementation
*
* These functions manipulate sctp SSN tracker.
*
* The SCTP reference implementation is free software;
* you can redistribute it and/or modify it under the terms of
* the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* The SCTP reference implementation is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* ************************
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU CC; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Please send any bug reports or fixes you make to the
* email address(es):
* lksctp developers <lksctp-developers@lists.sourceforge.net>
*
* Or submit a bug report through the following website:
* http://www.sf.net/projects/lksctp
*
* Written or modified by:
* Jon Grimm <jgrimm@us.ibm.com>
*
* Any bugs reported given to us we will try to fix... any fixes shared will
* be incorporated into the next SCTP release.
*/
#include <linux/types.h>
#include <net/sctp/sctp.h>
#include <net/sctp/sm.h>
/* Storage size needed for map includes 2 headers and then the
* specific needs of in or out streams.
*/
static inline size_t sctp_ssnmap_size(__u16 in, __u16 out)
{
return sizeof(struct sctp_ssnmap) + (in + out) * sizeof(__u16);
}
/* Create a new sctp_ssnmap.
* Allocate room to store at least 'len' contiguous TSNs.
*/
struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out, int priority)
{
struct sctp_ssnmap *retval;
retval = kmalloc(sctp_ssnmap_size(in, out), priority);
if (!retval)
goto fail;
if (!sctp_ssnmap_init(retval, in, out))
goto fail_map;
retval->malloced = 1;
SCTP_DBG_OBJCNT_INC(ssnmap);
return retval;
fail_map:
kfree(retval);
fail:
return NULL;
}
/* Initialize a block of memory as a ssnmap. */
struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *map, __u16 in,
__u16 out)
{
memset(map, 0x00, sctp_ssnmap_size(in, out));
/* Start 'in' stream just after the map header. */
map->in.ssn = (__u16 *)&map[1];
map->in.len = in;
/* Start 'out' stream just after 'in'. */
map->out.ssn = &map->in.ssn[in];
map->out.len = out;
return map;
}
/* Clear out the ssnmap streams. */
void sctp_ssnmap_clear(struct sctp_ssnmap *map)
{
size_t size;
size = (map->in.len + map->out.len) * sizeof(__u16);
memset(map->in.ssn, 0x00, size);
}
/* Dispose of a ssnmap. */
void sctp_ssnmap_free(struct sctp_ssnmap *map)
{
if (map && map->malloced) {
kfree(map);
SCTP_DBG_OBJCNT_DEC(ssnmap);
}
}
......@@ -42,6 +42,7 @@
* Xingang Guo <xingang.guo@intel.com>
* Hui Huang <hui.huang@nokia.com>
* Sridhar Samudrala <sri@us.ibm.com>
* Ardelle Fan <ardelle.fan@intel.com>
*
* Any bugs reported given to us we will try to fix... any fixes shared will
* be incorporated into the next SCTP release.
......@@ -184,8 +185,9 @@ void sctp_transport_reset_timers(sctp_transport_t *transport)
}
/* When a data chunk is sent, reset the heartbeat interval. */
if (!mod_timer(&transport->hb_timer,
transport->hb_interval + transport->rto + jiffies))
if (!mod_timer(&transport->hb_timer, transport->hb_interval +
transport->rto + sctp_jitter(transport->rto) +
jiffies))
sctp_transport_hold(transport);
}
......@@ -202,7 +204,7 @@ void sctp_transport_set_owner(sctp_transport_t *transport,
/* Caches the dst entry for a transport's destination address and an optional
* souce address.
*/
*/
void sctp_transport_route(sctp_transport_t *transport, union sctp_addr *saddr,
struct sctp_opt *opt)
{
......@@ -245,10 +247,10 @@ void sctp_transport_route(sctp_transport_t *transport, union sctp_addr *saddr,
goto out_unlock;
}
sctp_read_unlock(addr_lock);
/* None of the bound addresses match the source address of the
* dst. So release it.
*/
*/
dst_release(dst);
}
......
......@@ -606,9 +606,9 @@ sctp_ulpevent_t *sctp_ulpevent_make_shutdown_event(
sctp_ulpevent_t *sctp_ulpevent_make_rcvmsg(sctp_association_t *asoc,
sctp_chunk_t *chunk, int priority)
{
sctp_ulpevent_t *event;
sctp_ulpevent_t *event, *levent;
struct sctp_sndrcvinfo *info;
struct sk_buff *skb;
struct sk_buff *skb, *list;
size_t padding, len;
/* Clone the original skb, sharing the data. */
......@@ -647,6 +647,16 @@ sctp_ulpevent_t *sctp_ulpevent_make_rcvmsg(sctp_association_t *asoc,
event->malloced = 1;
for (list = skb_shinfo(skb)->frag_list; list; list = list->next) {
sctp_ulpevent_set_owner_r(list, asoc);
/* Initialize event with flags 0. */
levent = sctp_ulpevent_init(event, skb, 0);
if (!levent)
goto fail_init;
levent->malloced = 1;
}
info = (struct sctp_sndrcvinfo *) &event->sndrcvinfo;
/* Sockets API Extensions for SCTP
......@@ -764,6 +774,7 @@ static void sctp_rcvmsg_rfree(struct sk_buff *skb)
sctp_ulpevent_t *event;
sctp_chunk_t *sack;
struct timer_list *timer;
int skb_len = skb_headlen(skb);
/* Current stack structures assume that the rcv buffer is
* per socket. For UDP style sockets this is not true as
......@@ -774,23 +785,23 @@ static void sctp_rcvmsg_rfree(struct sk_buff *skb)
event = (sctp_ulpevent_t *) skb->cb;
asoc = event->asoc;
if (asoc->rwnd_over) {
if (asoc->rwnd_over >= skb->len) {
asoc->rwnd_over -= skb->len;
if (asoc->rwnd_over >= skb_len) {
asoc->rwnd_over -= skb_len;
} else {
asoc->rwnd += (skb->len - asoc->rwnd_over);
asoc->rwnd += (skb_len - asoc->rwnd_over);
asoc->rwnd_over = 0;
}
} else {
asoc->rwnd += skb->len;
asoc->rwnd += skb_len;
}
SCTP_DEBUG_PRINTK("rwnd increased by %d to (%u, %u) - %u\n",
skb->len, asoc->rwnd, asoc->rwnd_over, asoc->a_rwnd);
skb_len, asoc->rwnd, asoc->rwnd_over, asoc->a_rwnd);
/* Send a window update SACK if the rwnd has increased by at least the
* minimum of the association's PMTU and half of the receive buffer.
* The algorithm used is similar to the one described in Section 4.2.3.3
* of RFC 1122.
* The algorithm used is similar to the one described in
* Section 4.2.3.3 of RFC 1122.
*/
if ((asoc->state == SCTP_STATE_ESTABLISHED) &&
(asoc->rwnd > asoc->a_rwnd) &&
......@@ -808,7 +819,7 @@ static void sctp_rcvmsg_rfree(struct sk_buff *skb)
asoc->peer.sack_needed = 0;
asoc->peer.next_dup_tsn = 0;
sctp_push_outqueue(&asoc->outqueue, sack);
sctp_outq_tail(&asoc->outqueue, sack);
/* Stop the SACK timer. */
timer = &asoc->timers[SCTP_EVENT_TIMEOUT_SACK];
......@@ -824,6 +835,7 @@ static void sctp_rcvmsg_rfree(struct sk_buff *skb)
static void sctp_ulpevent_set_owner_r(struct sk_buff *skb, sctp_association_t *asoc)
{
sctp_ulpevent_t *event;
int skb_len = skb_headlen(skb);
/* The current stack structures assume that the rcv buffer is
* per socket. For UDP-style sockets this is not true as
......@@ -840,14 +852,14 @@ static void sctp_ulpevent_set_owner_r(struct sk_buff *skb, sctp_association_t *a
SCTP_ASSERT(asoc->rwnd, "rwnd zero", return);
SCTP_ASSERT(!asoc->rwnd_over, "rwnd_over not zero", return);
if (asoc->rwnd >= skb->len) {
asoc->rwnd -= skb->len;
if (asoc->rwnd >= skb_len) {
asoc->rwnd -= skb_len;
} else {
asoc->rwnd_over = skb->len - asoc->rwnd;
asoc->rwnd_over = skb_len - asoc->rwnd;
asoc->rwnd = 0;
}
SCTP_DEBUG_PRINTK("rwnd decreased by %d to (%u, %u)\n",
skb->len, asoc->rwnd, asoc->rwnd_over);
skb_len, asoc->rwnd, asoc->rwnd_over);
}
/* A simple destructor to give up the reference to the association. */
......
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