Commit bf953999 authored by Sridhar Samudrala's avatar Sridhar Samudrala

[SCTP] accept() support for TCP-style SCTP sockets.

parent 088e723f
......@@ -262,6 +262,8 @@ struct sctp_pf {
struct sctp_opt *);
int (*bind_verify) (struct sctp_opt *, union sctp_addr *);
int (*supported_addrs)(const struct sctp_opt *, __u16 *);
struct sock *(*create_accept_sk) (struct sock *sk,
struct sctp_association *asoc);
struct sctp_af *af;
};
......
......@@ -195,6 +195,8 @@ void sctp_endpoint_destroy(sctp_endpoint_t *ep)
{
SCTP_ASSERT(ep->base.dead, "Endpoint is not dead", return);
ep->base.sk->state = SCTP_SS_CLOSED;
/* Unlink this endpoint, so we can't find it again! */
sctp_unhash_endpoint(ep);
......
......@@ -432,6 +432,62 @@ static sctp_scope_t sctp_v6_scope(union sctp_addr *addr)
return retval;
}
/* Create and initialize a new sk for the socket to be returned by accept(). */
struct sock *sctp_v6_create_accept_sk(struct sock *sk,
struct sctp_association *asoc)
{
struct inet_opt *inet = inet_sk(sk);
struct sock *newsk;
struct inet_opt *newinet;
struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
struct sctp6_sock *newsctp6sk;
newsk = sk_alloc(PF_INET6, GFP_KERNEL, sizeof(struct sctp6_sock),
sk->slab);
if (!newsk)
goto out;
sock_init_data(NULL, newsk);
newsk->type = SOCK_STREAM;
newsk->prot = sk->prot;
newsk->no_check = sk->no_check;
newsk->reuse = sk->reuse;
newsk->destruct = inet_sock_destruct;
newsk->zapped = 0;
newsk->family = PF_INET6;
newsk->protocol = IPPROTO_SCTP;
newsk->backlog_rcv = sk->prot->backlog_rcv;
newsctp6sk = (struct sctp6_sock *)newsk;
newsctp6sk->pinet6 = &newsctp6sk->inet6;
newinet = inet_sk(newsk);
newnp = inet6_sk(newsk);
memcpy(newnp, np, sizeof(struct ipv6_pinfo));
ipv6_addr_copy(&newnp->daddr, &asoc->peer.primary_addr.v6.sin6_addr);
newinet->sport = inet->sport;
newinet->dport = asoc->peer.port;
#ifdef INET_REFCNT_DEBUG
atomic_inc(&inet6_sock_nr);
atomic_inc(&inet_sock_nr);
#endif
if (0 != newsk->prot->init(newsk)) {
inet_sock_release(newsk);
newsk = NULL;
}
out:
return newsk;
}
/* Initialize a PF_INET6 socket msg_name. */
static void sctp_inet6_msgname(char *msgname, int *addr_len)
{
......@@ -597,7 +653,7 @@ static struct proto_ops inet6_seqpacket_ops = {
.mmap = sock_no_mmap,
};
static struct inet_protosw sctpv6_protosw = {
static struct inet_protosw sctpv6_seqpacket_protosw = {
.type = SOCK_SEQPACKET,
.protocol = IPPROTO_SCTP,
.prot = &sctp_prot,
......@@ -606,6 +662,15 @@ static struct inet_protosw sctpv6_protosw = {
.no_check = 0,
.flags = SCTP_PROTOSW_FLAG
};
static struct inet_protosw sctpv6_stream_protosw = {
.type = SOCK_STREAM,
.protocol = IPPROTO_SCTP,
.prot = &sctp_prot,
.ops = &inet6_seqpacket_ops,
.capability = -1,
.no_check = 0,
.flags = SCTP_PROTOSW_FLAG
};
static struct inet6_protocol sctpv6_protocol = {
.handler = sctp_rcv,
......@@ -641,6 +706,7 @@ static struct sctp_pf sctp_pf_inet6_specific = {
.cmp_addr = sctp_inet6_cmp_addr,
.bind_verify = sctp_inet6_bind_verify,
.supported_addrs = sctp_inet6_supported_addrs,
.create_accept_sk = sctp_v6_create_accept_sk,
.af = &sctp_ipv6_specific,
};
......@@ -651,8 +717,9 @@ int sctp_v6_init(void)
if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0)
return -EAGAIN;
/* Add SCTPv6 to inetsw6 linked list. */
inet6_register_protosw(&sctpv6_protosw);
/* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */
inet6_register_protosw(&sctpv6_seqpacket_protosw);
inet6_register_protosw(&sctpv6_stream_protosw);
/* Register the SCTP specfic PF_INET6 functions. */
sctp_register_pf(&sctp_pf_inet6_specific, PF_INET6);
......@@ -671,6 +738,7 @@ void sctp_v6_exit(void)
{
list_del(&sctp_ipv6_specific.list);
inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP);
inet6_unregister_protosw(&sctpv6_protosw);
inet6_unregister_protosw(&sctpv6_seqpacket_protosw);
inet6_unregister_protosw(&sctpv6_stream_protosw);
unregister_inet6addr_notifier(&sctp_inetaddr_notifier);
}
......@@ -480,6 +480,61 @@ void sctp_v4_get_saddr(sctp_association_t *asoc,
}
/* Create and initialize a new sk for the socket returned by accept(). */
struct sock *sctp_v4_create_accept_sk(struct sock *sk,
struct sctp_association *asoc)
{
struct sock *newsk;
struct inet_opt *inet = inet_sk(sk);
struct inet_opt *newinet;
newsk = sk_alloc(PF_INET, GFP_KERNEL, sizeof(struct sctp_sock),
sk->slab);
if (!newsk)
goto out;
sock_init_data(NULL, newsk);
newsk->type = SOCK_STREAM;
newsk->prot = sk->prot;
newsk->no_check = sk->no_check;
newsk->reuse = sk->reuse;
newsk->destruct = inet_sock_destruct;
newsk->zapped = 0;
newsk->family = PF_INET;
newsk->protocol = IPPROTO_SCTP;
newsk->backlog_rcv = sk->prot->backlog_rcv;
newinet = inet_sk(newsk);
newinet->sport = inet->sport;
newinet->saddr = inet->saddr;
newinet->rcv_saddr = inet->saddr;
newinet->dport = asoc->peer.port;
newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
newinet->pmtudisc = inet->pmtudisc;
newinet->id = 0;
newinet->ttl = sysctl_ip_default_ttl;
newinet->mc_loop = 1;
newinet->mc_ttl = 1;
newinet->mc_index = 0;
newinet->mc_list = NULL;
#ifdef INET_REFCNT_DEBUG
atomic_inc(&inet_sock_nr);
#endif
if (0 != newsk->prot->init(newsk)) {
inet_sock_release(newsk);
newsk = NULL;
}
out:
return newsk;
}
/* Event handler for inet address addition/deletion events.
* Basically, whenever there is an event, we re-build our local address list.
*/
......@@ -664,6 +719,7 @@ static struct sctp_pf sctp_pf_inet = {
.cmp_addr = sctp_inet_cmp_addr,
.bind_verify = sctp_inet_bind_verify,
.supported_addrs = sctp_inet_supported_addrs,
.create_accept_sk = sctp_v4_create_accept_sk,
.af = &sctp_ipv4_specific,
};
......@@ -694,7 +750,7 @@ struct proto_ops inet_seqpacket_ops = {
};
/* Registration with AF_INET family. */
struct inet_protosw sctp_protosw = {
static struct inet_protosw sctp_seqpacket_protosw = {
.type = SOCK_SEQPACKET,
.protocol = IPPROTO_SCTP,
.prot = &sctp_prot,
......@@ -703,6 +759,15 @@ struct inet_protosw sctp_protosw = {
.no_check = 0,
.flags = SCTP_PROTOSW_FLAG
};
static struct inet_protosw sctp_stream_protosw = {
.type = SOCK_STREAM,
.protocol = IPPROTO_SCTP,
.prot = &sctp_prot,
.ops = &inet_seqpacket_ops,
.capability = -1,
.no_check = 0,
.flags = SCTP_PROTOSW_FLAG
};
/* Register with IP layer. */
static struct inet_protocol sctp_protocol = {
......@@ -809,8 +874,9 @@ __init int sctp_init(void)
if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
return -EAGAIN;
/* Add SCTP to inetsw linked list. */
inet_register_protosw(&sctp_protosw);
/* Add SCTP(TCP and UDP style) to inetsw linked list. */
inet_register_protosw(&sctp_seqpacket_protosw);
inet_register_protosw(&sctp_stream_protosw);
/* Allocate and initialise sctp mibs. */
status = init_sctp_mibs();
......@@ -956,7 +1022,8 @@ __init int sctp_init(void)
cleanup_sctp_mibs();
err_init_mibs:
inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
inet_unregister_protosw(&sctp_protosw);
inet_unregister_protosw(&sctp_seqpacket_protosw);
inet_unregister_protosw(&sctp_stream_protosw);
return status;
}
......@@ -989,7 +1056,8 @@ __exit void sctp_exit(void)
cleanup_sctp_mibs();
inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
inet_unregister_protosw(&sctp_protosw);
inet_unregister_protosw(&sctp_seqpacket_protosw);
inet_unregister_protosw(&sctp_stream_protosw);
}
module_init(sctp_init);
......
......@@ -1223,13 +1223,28 @@ static void sctp_cmd_setup_t2(sctp_cmd_seq_t *cmds, sctp_association_t *asoc,
static void sctp_cmd_new_state(sctp_cmd_seq_t *cmds, sctp_association_t *asoc,
sctp_state_t state)
{
struct sock *sk = asoc->base.sk;
struct sctp_opt *sp = sctp_sk(sk);
asoc->state = state;
asoc->state_timestamp = jiffies;
/* Wake up any process waiting for the association to
* get established.
*/
if ((SCTP_STATE_ESTABLISHED == asoc->state) &&
(waitqueue_active(&asoc->wait)))
wake_up_interruptible(&asoc->wait);
if ((SCTP_STATE_ESTABLISHED == asoc->state) ||
(SCTP_STATE_CLOSED == asoc->state)) {
/* Wake up any processes waiting in the asoc's wait queue in
* sctp_wait_for_connect() or sctp_wait_for_sndbuf().
*/
if (waitqueue_active(&asoc->wait))
wake_up_interruptible(&asoc->wait);
/* 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 (sp->type != SCTP_SOCKET_UDP)
sk->state_change(sk);
}
}
This diff is collapsed.
......@@ -230,7 +230,7 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
sctp_ulpq_clear_pd(ulpq);
if (queue == &sk->receive_queue)
wake_up_interruptible(sk->sleep);
sk->data_ready(sk, 0);
return 1;
out_free:
......@@ -790,5 +790,5 @@ void sctp_ulpq_abort_pd(struct sctp_ulpq *ulpq, int priority)
/* If there is data waiting, send it up the socket now. */
if (sctp_ulpq_clear_pd(ulpq) || ev)
wake_up_interruptible(sk->sleep);
sk->data_ready(sk, 0);
}
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