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Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c178
1 files changed, 153 insertions, 25 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index b8cebd5a87e5..65d6d04546ae 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2027,7 +2027,7 @@ static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
struct sctp_transport *transport = NULL;
struct sctp_sndrcvinfo _sinfo, *sinfo;
- struct sctp_association *asoc;
+ struct sctp_association *asoc, *tmp;
struct sctp_cmsgs cmsgs;
union sctp_addr *daddr;
bool new = false;
@@ -2053,7 +2053,7 @@ static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
/* SCTP_SENDALL process */
if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) {
- list_for_each_entry(asoc, &ep->asocs, asocs) {
+ list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) {
err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
msg_len);
if (err == 0)
@@ -2230,7 +2230,7 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (sp->recvrcvinfo)
sctp_ulpevent_read_rcvinfo(event, msg);
/* Check if we allow SCTP_SNDRCVINFO. */
- if (sp->subscribe.sctp_data_io_event)
+ if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT))
sctp_ulpevent_read_sndrcvinfo(event, msg);
err = copied;
@@ -2304,22 +2304,33 @@ static int sctp_setsockopt_disable_fragments(struct sock *sk,
static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
unsigned int optlen)
{
+ struct sctp_event_subscribe subscribe;
+ __u8 *sn_type = (__u8 *)&subscribe;
+ struct sctp_sock *sp = sctp_sk(sk);
struct sctp_association *asoc;
- struct sctp_ulpevent *event;
+ int i;
if (optlen > sizeof(struct sctp_event_subscribe))
return -EINVAL;
- if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen))
+
+ if (copy_from_user(&subscribe, optval, optlen))
return -EFAULT;
+ for (i = 0; i < optlen; i++)
+ sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
+ sn_type[i]);
+
+ list_for_each_entry(asoc, &sp->ep->asocs, asocs)
+ asoc->subscribe = sctp_sk(sk)->subscribe;
+
/* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
* if there is no data to be sent or retransmit, the stack will
* immediately send up this notification.
*/
- if (sctp_ulpevent_type_enabled(SCTP_SENDER_DRY_EVENT,
- &sctp_sk(sk)->subscribe)) {
- asoc = sctp_id2assoc(sk, 0);
+ if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
+ struct sctp_ulpevent *event;
+ asoc = sctp_id2assoc(sk, 0);
if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
event = sctp_ulpevent_make_sender_dry_event(asoc,
GFP_USER | __GFP_NOWARN);
@@ -4260,6 +4271,57 @@ static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval,
return 0;
}
+static int sctp_setsockopt_event(struct sock *sk, char __user *optval,
+ unsigned int optlen)
+{
+ struct sctp_association *asoc;
+ struct sctp_ulpevent *event;
+ struct sctp_event param;
+ int retval = 0;
+
+ if (optlen < sizeof(param)) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ optlen = sizeof(param);
+ if (copy_from_user(&param, optval, optlen)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ if (param.se_type < SCTP_SN_TYPE_BASE ||
+ param.se_type > SCTP_SN_TYPE_MAX) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ asoc = sctp_id2assoc(sk, param.se_assoc_id);
+ if (!asoc) {
+ sctp_ulpevent_type_set(&sctp_sk(sk)->subscribe,
+ param.se_type, param.se_on);
+ goto out;
+ }
+
+ sctp_ulpevent_type_set(&asoc->subscribe, param.se_type, param.se_on);
+
+ if (param.se_type == SCTP_SENDER_DRY_EVENT && param.se_on) {
+ if (sctp_outq_is_empty(&asoc->outqueue)) {
+ event = sctp_ulpevent_make_sender_dry_event(asoc,
+ GFP_USER | __GFP_NOWARN);
+ if (!event) {
+ retval = -ENOMEM;
+ goto out;
+ }
+
+ asoc->stream.si->enqueue_event(&asoc->ulpq, event);
+ }
+ }
+
+out:
+ return retval;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -4457,6 +4519,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_REUSE_PORT:
retval = sctp_setsockopt_reuse_port(sk, optval, optlen);
break;
+ case SCTP_EVENT:
+ retval = sctp_setsockopt_event(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
@@ -4705,7 +4770,7 @@ static int sctp_init_sock(struct sock *sk)
/* Initialize default event subscriptions. By default, all the
* options are off.
*/
- memset(&sp->subscribe, 0, sizeof(struct sctp_event_subscribe));
+ sp->subscribe = 0;
/* Default Peer Address Parameters. These defaults can
* be modified via SCTP_PEER_ADDR_PARAMS
@@ -5250,14 +5315,24 @@ static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
int __user *optlen)
{
+ struct sctp_event_subscribe subscribe;
+ __u8 *sn_type = (__u8 *)&subscribe;
+ int i;
+
if (len == 0)
return -EINVAL;
if (len > sizeof(struct sctp_event_subscribe))
len = sizeof(struct sctp_event_subscribe);
if (put_user(len, optlen))
return -EFAULT;
- if (copy_to_user(optval, &sctp_sk(sk)->subscribe, len))
+
+ for (i = 0; i < len; i++)
+ sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
+ SCTP_SN_TYPE_BASE + i);
+
+ if (copy_to_user(optval, &subscribe, len))
return -EFAULT;
+
return 0;
}
@@ -7392,6 +7467,37 @@ static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
return 0;
}
+static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
+ int __user *optlen)
+{
+ struct sctp_association *asoc;
+ struct sctp_event param;
+ __u16 subscribe;
+
+ if (len < sizeof(param))
+ return -EINVAL;
+
+ len = sizeof(param);
+ if (copy_from_user(&param, optval, len))
+ return -EFAULT;
+
+ if (param.se_type < SCTP_SN_TYPE_BASE ||
+ param.se_type > SCTP_SN_TYPE_MAX)
+ return -EINVAL;
+
+ asoc = sctp_id2assoc(sk, param.se_assoc_id);
+ subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
+ param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+
+ if (copy_to_user(optval, &param, len))
+ return -EFAULT;
+
+ return 0;
+}
+
static int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -7590,6 +7696,9 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
case SCTP_REUSE_PORT:
retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
break;
+ case SCTP_EVENT:
+ retval = sctp_getsockopt_event(sk, len, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
@@ -7627,8 +7736,10 @@ static struct sctp_bind_bucket *sctp_bucket_create(
static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
{
- bool reuse = (sk->sk_reuse || sctp_sk(sk)->reuse);
+ struct sctp_sock *sp = sctp_sk(sk);
+ bool reuse = (sk->sk_reuse || sp->reuse);
struct sctp_bind_hashbucket *head; /* hash list */
+ kuid_t uid = sock_i_uid(sk);
struct sctp_bind_bucket *pp;
unsigned short snum;
int ret;
@@ -7704,7 +7815,10 @@ pp_found:
pr_debug("%s: found a possible match\n", __func__);
- if (pp->fastreuse && reuse && sk->sk_state != SCTP_SS_LISTENING)
+ if ((pp->fastreuse && reuse &&
+ sk->sk_state != SCTP_SS_LISTENING) ||
+ (pp->fastreuseport && sk->sk_reuseport &&
+ uid_eq(pp->fastuid, uid)))
goto success;
/* Run through the list of sockets bound to the port
@@ -7718,16 +7832,18 @@ pp_found:
* in an endpoint.
*/
sk_for_each_bound(sk2, &pp->owner) {
- struct sctp_endpoint *ep2;
- ep2 = sctp_sk(sk2)->ep;
+ struct sctp_sock *sp2 = sctp_sk(sk2);
+ struct sctp_endpoint *ep2 = sp2->ep;
if (sk == sk2 ||
- (reuse && (sk2->sk_reuse || sctp_sk(sk2)->reuse) &&
- sk2->sk_state != SCTP_SS_LISTENING))
+ (reuse && (sk2->sk_reuse || sp2->reuse) &&
+ sk2->sk_state != SCTP_SS_LISTENING) ||
+ (sk->sk_reuseport && sk2->sk_reuseport &&
+ uid_eq(uid, sock_i_uid(sk2))))
continue;
- if (sctp_bind_addr_conflict(&ep2->base.bind_addr, addr,
- sctp_sk(sk2), sctp_sk(sk))) {
+ if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
+ addr, sp2, sp)) {
ret = (long)sk2;
goto fail_unlock;
}
@@ -7750,19 +7866,32 @@ pp_not_found:
pp->fastreuse = 1;
else
pp->fastreuse = 0;
- } else if (pp->fastreuse &&
- (!reuse || sk->sk_state == SCTP_SS_LISTENING))
- pp->fastreuse = 0;
+
+ if (sk->sk_reuseport) {
+ pp->fastreuseport = 1;
+ pp->fastuid = uid;
+ } else {
+ pp->fastreuseport = 0;
+ }
+ } else {
+ if (pp->fastreuse &&
+ (!reuse || sk->sk_state == SCTP_SS_LISTENING))
+ pp->fastreuse = 0;
+
+ if (pp->fastreuseport &&
+ (!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
+ pp->fastreuseport = 0;
+ }
/* We are set, so fill up all the data in the hash table
* entry, tie the socket list information with the rest of the
* sockets FIXME: Blurry, NPI (ipg).
*/
success:
- if (!sctp_sk(sk)->bind_hash) {
+ if (!sp->bind_hash) {
inet_sk(sk)->inet_num = snum;
sk_add_bind_node(sk, &pp->owner);
- sctp_sk(sk)->bind_hash = pp;
+ sp->bind_hash = pp;
}
ret = 0;
@@ -7835,8 +7964,7 @@ static int sctp_listen_start(struct sock *sk, int backlog)
}
sk->sk_max_ack_backlog = backlog;
- sctp_hash_endpoint(ep);
- return 0;
+ return sctp_hash_endpoint(ep);
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-27 05:59:11 +0000