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Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c216
1 files changed, 100 insertions, 116 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ff0a8f88de0..5fb3a8c9792 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3069,9 +3069,6 @@ static int sctp_setsockopt_maxburst(struct sock *sk,
int val;
int assoc_id = 0;
- if (optlen < sizeof(int))
- return -EINVAL;
-
if (optlen == sizeof(int)) {
printk(KERN_WARNING
"SCTP: Use of int in max_burst socket option deprecated\n");
@@ -3939,7 +3936,6 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
{
struct sock *sk = asoc->base.sk;
struct socket *sock;
- struct inet_sock *inetsk;
struct sctp_af *af;
int err = 0;
@@ -3954,18 +3950,18 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
if (err < 0)
return err;
- /* Populate the fields of the newsk from the oldsk and migrate the
- * asoc to the newsk.
- */
- sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
+ sctp_copy_sock(sock->sk, sk, asoc);
/* Make peeled-off sockets more like 1-1 accepted sockets.
* Set the daddr and initialize id to something more random
*/
af = sctp_get_af_specific(asoc->peer.primary_addr.sa.sa_family);
af->to_sk_daddr(&asoc->peer.primary_addr, sk);
- inetsk = inet_sk(sock->sk);
- inetsk->id = asoc->next_tsn ^ jiffies;
+
+ /* Populate the fields of the newsk from the oldsk and migrate the
+ * asoc to the newsk.
+ */
+ sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
*sockp = sock;
@@ -5284,16 +5280,14 @@ static int sctp_getsockopt_maxburst(struct sock *sk, int len,
struct sctp_sock *sp;
struct sctp_association *asoc;
- if (len < sizeof(int))
- return -EINVAL;
-
if (len == sizeof(int)) {
printk(KERN_WARNING
"SCTP: Use of int in max_burst socket option deprecated\n");
printk(KERN_WARNING
"SCTP: Use struct sctp_assoc_value instead\n");
params.assoc_id = 0;
- } else if (len == sizeof (struct sctp_assoc_value)) {
+ } else if (len >= sizeof(struct sctp_assoc_value)) {
+ len = sizeof(struct sctp_assoc_value);
if (copy_from_user(&params, optval, len))
return -EFAULT;
} else
@@ -5849,37 +5843,28 @@ static int sctp_get_port(struct sock *sk, unsigned short snum)
}
/*
- * 3.1.3 listen() - UDP Style Syntax
- *
- * By default, new associations are not accepted for UDP style sockets.
- * An application uses listen() to mark a socket as being able to
- * accept new associations.
+ * Move a socket to LISTENING state.
*/
-SCTP_STATIC int sctp_seqpacket_listen(struct sock *sk, int backlog)
+SCTP_STATIC int sctp_listen_start(struct sock *sk, int backlog)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_endpoint *ep = sp->ep;
+ struct crypto_hash *tfm = NULL;
- /* Only UDP style sockets that are not peeled off are allowed to
- * listen().
- */
- if (!sctp_style(sk, UDP))
- return -EINVAL;
-
- /* If backlog is zero, disable listening. */
- if (!backlog) {
- if (sctp_sstate(sk, CLOSED))
- return 0;
-
- sctp_unhash_endpoint(ep);
- sk->sk_state = SCTP_SS_CLOSED;
- return 0;
+ /* Allocate HMAC for generating cookie. */
+ if (!sctp_sk(sk)->hmac && sctp_hmac_alg) {
+ tfm = crypto_alloc_hash(sctp_hmac_alg, 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm)) {
+ if (net_ratelimit()) {
+ printk(KERN_INFO
+ "SCTP: failed to load transform for %s: %ld\n",
+ sctp_hmac_alg, PTR_ERR(tfm));
+ }
+ return -ENOSYS;
+ }
+ sctp_sk(sk)->hmac = tfm;
}
- /* Return if we are already listening. */
- if (sctp_sstate(sk, LISTENING))
- return 0;
-
/*
* If a bind() or sctp_bindx() is not called prior to a listen()
* call that allows new associations to be accepted, the system
@@ -5890,7 +5875,6 @@ SCTP_STATIC int sctp_seqpacket_listen(struct sock *sk, int backlog)
* extensions draft, but follows the practice as seen in TCP
* sockets.
*
- * Additionally, turn off fastreuse flag since we are not listening
*/
sk->sk_state = SCTP_SS_LISTENING;
if (!ep->base.bind_addr.port) {
@@ -5901,113 +5885,71 @@ SCTP_STATIC int sctp_seqpacket_listen(struct sock *sk, int backlog)
sk->sk_state = SCTP_SS_CLOSED;
return -EADDRINUSE;
}
- sctp_sk(sk)->bind_hash->fastreuse = 0;
}
- sctp_hash_endpoint(ep);
- return 0;
-}
-
-/*
- * 4.1.3 listen() - TCP Style Syntax
- *
- * Applications uses listen() to ready the SCTP endpoint for accepting
- * inbound associations.
- */
-SCTP_STATIC int sctp_stream_listen(struct sock *sk, int backlog)
-{
- struct sctp_sock *sp = sctp_sk(sk);
- struct sctp_endpoint *ep = sp->ep;
-
- /* If backlog is zero, disable listening. */
- if (!backlog) {
- if (sctp_sstate(sk, CLOSED))
- return 0;
-
- sctp_unhash_endpoint(ep);
- sk->sk_state = SCTP_SS_CLOSED;
- return 0;
- }
-
- if (sctp_sstate(sk, LISTENING))
- return 0;
-
- /*
- * If a bind() or sctp_bindx() is not called prior to a listen()
- * call that allows new associations to be accepted, the system
- * picks an ephemeral port and will choose an address set equivalent
- * to binding with a wildcard address.
- *
- * This is not currently spelled out in the SCTP sockets
- * extensions draft, but follows the practice as seen in TCP
- * sockets.
- */
- sk->sk_state = SCTP_SS_LISTENING;
- if (!ep->base.bind_addr.port) {
- if (sctp_autobind(sk))
- return -EAGAIN;
- } else
- sctp_sk(sk)->bind_hash->fastreuse = 0;
-
sk->sk_max_ack_backlog = backlog;
sctp_hash_endpoint(ep);
return 0;
}
/*
+ * 4.1.3 / 5.1.3 listen()
+ *
+ * By default, new associations are not accepted for UDP style sockets.
+ * An application uses listen() to mark a socket as being able to
+ * accept new associations.
+ *
+ * On TCP style sockets, applications use listen() to ready the SCTP
+ * endpoint for accepting inbound associations.
+ *
+ * On both types of endpoints a backlog of '0' disables listening.
+ *
* Move a socket to LISTENING state.
*/
int sctp_inet_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
- struct crypto_hash *tfm = NULL;
+ struct sctp_endpoint *ep = sctp_sk(sk)->ep;
int err = -EINVAL;
if (unlikely(backlog < 0))
- goto out;
+ return err;
sctp_lock_sock(sk);
+ /* Peeled-off sockets are not allowed to listen(). */
+ if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
+ goto out;
+
if (sock->state != SS_UNCONNECTED)
goto out;
- /* Allocate HMAC for generating cookie. */
- if (!sctp_sk(sk)->hmac && sctp_hmac_alg) {
- tfm = crypto_alloc_hash(sctp_hmac_alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(tfm)) {
- if (net_ratelimit()) {
- printk(KERN_INFO
- "SCTP: failed to load transform for %s: %ld\n",
- sctp_hmac_alg, PTR_ERR(tfm));
- }
- err = -ENOSYS;
+ /* If backlog is zero, disable listening. */
+ if (!backlog) {
+ if (sctp_sstate(sk, CLOSED))
goto out;
- }
- }
- switch (sock->type) {
- case SOCK_SEQPACKET:
- err = sctp_seqpacket_listen(sk, backlog);
- break;
- case SOCK_STREAM:
- err = sctp_stream_listen(sk, backlog);
- break;
- default:
- break;
+ err = 0;
+ sctp_unhash_endpoint(ep);
+ sk->sk_state = SCTP_SS_CLOSED;
+ if (sk->sk_reuse)
+ sctp_sk(sk)->bind_hash->fastreuse = 1;
+ goto out;
}
- if (err)
- goto cleanup;
+ /* If we are already listening, just update the backlog */
+ if (sctp_sstate(sk, LISTENING))
+ sk->sk_max_ack_backlog = backlog;
+ else {
+ err = sctp_listen_start(sk, backlog);
+ if (err)
+ goto out;
+ }
- /* Store away the transform reference. */
- if (!sctp_sk(sk)->hmac)
- sctp_sk(sk)->hmac = tfm;
+ err = 0;
out:
sctp_release_sock(sk);
return err;
-cleanup:
- crypto_free_hash(tfm);
- goto out;
}
/*
@@ -6700,6 +6642,48 @@ done:
sctp_skb_set_owner_r(skb, sk);
}
+void sctp_copy_sock(struct sock *newsk, struct sock *sk,
+ struct sctp_association *asoc)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct inet_sock *newinet = inet_sk(newsk);
+
+ newsk->sk_type = sk->sk_type;
+ newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
+ newsk->sk_flags = sk->sk_flags;
+ newsk->sk_no_check = sk->sk_no_check;
+ newsk->sk_reuse = sk->sk_reuse;
+
+ newsk->sk_shutdown = sk->sk_shutdown;
+ newsk->sk_destruct = inet_sock_destruct;
+ newsk->sk_family = sk->sk_family;
+ newsk->sk_protocol = IPPROTO_SCTP;
+ newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
+ newsk->sk_sndbuf = sk->sk_sndbuf;
+ newsk->sk_rcvbuf = sk->sk_rcvbuf;
+ newsk->sk_lingertime = sk->sk_lingertime;
+ newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
+ newsk->sk_sndtimeo = sk->sk_sndtimeo;
+
+ newinet = inet_sk(newsk);
+
+ /* Initialize sk's sport, dport, rcv_saddr and daddr for
+ * getsockname() and getpeername()
+ */
+ newinet->sport = inet->sport;
+ newinet->saddr = inet->saddr;
+ newinet->rcv_saddr = inet->rcv_saddr;
+ newinet->dport = htons(asoc->peer.port);
+ newinet->pmtudisc = inet->pmtudisc;
+ newinet->id = asoc->next_tsn ^ jiffies;
+
+ newinet->uc_ttl = inet->uc_ttl;
+ newinet->mc_loop = 1;
+ newinet->mc_ttl = 1;
+ newinet->mc_index = 0;
+ newinet->mc_list = NULL;
+}
+
/* Populate the fields of the newsk from the oldsk and migrate the assoc
* and its messages to the newsk.
*/
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-25 09:18:29 +0000