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-rw-r--r--include/net/sctp/user.h8
-rw-r--r--net/sctp/sm_make_chunk.c2
-rw-r--r--net/sctp/socket.c90
-rw-r--r--net/sctp/ulpevent.c6
4 files changed, 64 insertions, 42 deletions
diff --git a/include/net/sctp/user.h b/include/net/sctp/user.h
index 1c5f19f995a..f1c3bc54526 100644
--- a/include/net/sctp/user.h
+++ b/include/net/sctp/user.h
@@ -171,10 +171,10 @@ struct sctp_sndrcvinfo {
*/
enum sctp_sinfo_flags {
- MSG_UNORDERED = 1, /* Send/receive message unordered. */
- MSG_ADDR_OVER = 2, /* Override the primary destination. */
- MSG_ABORT=4, /* Send an ABORT message to the peer. */
- /* MSG_EOF is already defined per socket.h */
+ SCTP_UNORDERED = 1, /* Send/receive message unordered. */
+ SCTP_ADDR_OVER = 2, /* Override the primary destination. */
+ SCTP_ABORT=4, /* Send an ABORT message to the peer. */
+ SCTP_EOF=MSG_FIN, /* Initiate graceful shutdown process. */
};
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 10e82ec2ebd..660c61bdf16 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -554,7 +554,7 @@ struct sctp_chunk *sctp_make_datafrag_empty(struct sctp_association *asoc,
dp.ppid = sinfo->sinfo_ppid;
/* Set the flags for an unordered send. */
- if (sinfo->sinfo_flags & MSG_UNORDERED) {
+ if (sinfo->sinfo_flags & SCTP_UNORDERED) {
flags |= SCTP_DATA_UNORDERED;
dp.ssn = 0;
} else
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 02e068d3450..b529af5e6f2 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1010,6 +1010,19 @@ static int __sctp_connect(struct sock* sk,
err = -EAGAIN;
goto out_free;
}
+ } else {
+ /*
+ * If an unprivileged user inherits a 1-many
+ * style socket with open associations on a
+ * privileged port, it MAY be permitted to
+ * accept new associations, but it SHOULD NOT
+ * be permitted to open new associations.
+ */
+ if (ep->base.bind_addr.port < PROT_SOCK &&
+ !capable(CAP_NET_BIND_SERVICE)) {
+ err = -EACCES;
+ goto out_free;
+ }
}
scope = sctp_scope(&to);
@@ -1389,27 +1402,27 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
SCTP_DEBUG_PRINTK("msg_len: %zu, sinfo_flags: 0x%x\n",
msg_len, sinfo_flags);
- /* MSG_EOF or MSG_ABORT cannot be set on a TCP-style socket. */
- if (sctp_style(sk, TCP) && (sinfo_flags & (MSG_EOF | MSG_ABORT))) {
+ /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */
+ if (sctp_style(sk, TCP) && (sinfo_flags & (SCTP_EOF | SCTP_ABORT))) {
err = -EINVAL;
goto out_nounlock;
}
- /* If MSG_EOF is set, no data can be sent. Disallow sending zero
- * length messages when MSG_EOF|MSG_ABORT is not set.
- * If MSG_ABORT is set, the message length could be non zero with
+ /* If SCTP_EOF is set, no data can be sent. Disallow sending zero
+ * length messages when SCTP_EOF|SCTP_ABORT is not set.
+ * If SCTP_ABORT is set, the message length could be non zero with
* the msg_iov set to the user abort reason.
*/
- if (((sinfo_flags & MSG_EOF) && (msg_len > 0)) ||
- (!(sinfo_flags & (MSG_EOF|MSG_ABORT)) && (msg_len == 0))) {
+ if (((sinfo_flags & SCTP_EOF) && (msg_len > 0)) ||
+ (!(sinfo_flags & (SCTP_EOF|SCTP_ABORT)) && (msg_len == 0))) {
err = -EINVAL;
goto out_nounlock;
}
- /* If MSG_ADDR_OVER is set, there must be an address
+ /* If SCTP_ADDR_OVER is set, there must be an address
* specified in msg_name.
*/
- if ((sinfo_flags & MSG_ADDR_OVER) && (!msg->msg_name)) {
+ if ((sinfo_flags & SCTP_ADDR_OVER) && (!msg->msg_name)) {
err = -EINVAL;
goto out_nounlock;
}
@@ -1458,14 +1471,14 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
goto out_unlock;
}
- if (sinfo_flags & MSG_EOF) {
+ if (sinfo_flags & SCTP_EOF) {
SCTP_DEBUG_PRINTK("Shutting down association: %p\n",
asoc);
sctp_primitive_SHUTDOWN(asoc, NULL);
err = 0;
goto out_unlock;
}
- if (sinfo_flags & MSG_ABORT) {
+ if (sinfo_flags & SCTP_ABORT) {
SCTP_DEBUG_PRINTK("Aborting association: %p\n", asoc);
sctp_primitive_ABORT(asoc, msg);
err = 0;
@@ -1477,7 +1490,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
if (!asoc) {
SCTP_DEBUG_PRINTK("There is no association yet.\n");
- if (sinfo_flags & (MSG_EOF | MSG_ABORT)) {
+ if (sinfo_flags & (SCTP_EOF | SCTP_ABORT)) {
err = -EINVAL;
goto out_unlock;
}
@@ -1515,6 +1528,19 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
err = -EAGAIN;
goto out_unlock;
}
+ } else {
+ /*
+ * If an unprivileged user inherits a one-to-many
+ * style socket with open associations on a privileged
+ * port, it MAY be permitted to accept new associations,
+ * but it SHOULD NOT be permitted to open new
+ * associations.
+ */
+ if (ep->base.bind_addr.port < PROT_SOCK &&
+ !capable(CAP_NET_BIND_SERVICE)) {
+ err = -EACCES;
+ goto out_unlock;
+ }
}
scope = sctp_scope(&to);
@@ -1611,10 +1637,10 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
/* If an address is passed with the sendto/sendmsg call, it is used
* to override the primary destination address in the TCP model, or
- * when MSG_ADDR_OVER flag is set in the UDP model.
+ * when SCTP_ADDR_OVER flag is set in the UDP model.
*/
if ((sctp_style(sk, TCP) && msg_name) ||
- (sinfo_flags & MSG_ADDR_OVER)) {
+ (sinfo_flags & SCTP_ADDR_OVER)) {
chunk_tp = sctp_assoc_lookup_paddr(asoc, &to);
if (!chunk_tp) {
err = -EINVAL;
@@ -2306,16 +2332,14 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optl
return -EINVAL;
if (get_user(val, (int __user *)optval))
return -EFAULT;
- if ((val < 8) || (val > SCTP_MAX_CHUNK_LEN))
+ if ((val != 0) && ((val < 8) || (val > SCTP_MAX_CHUNK_LEN)))
return -EINVAL;
sp->user_frag = val;
- if (val) {
- /* Update the frag_point of the existing associations. */
- list_for_each(pos, &(sp->ep->asocs)) {
- asoc = list_entry(pos, struct sctp_association, asocs);
- asoc->frag_point = sctp_frag_point(sp, asoc->pmtu);
- }
+ /* Update the frag_point of the existing associations. */
+ list_for_each(pos, &(sp->ep->asocs)) {
+ asoc = list_entry(pos, struct sctp_association, asocs);
+ asoc->frag_point = sctp_frag_point(sp, asoc->pmtu);
}
return 0;
@@ -2384,14 +2408,14 @@ static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optva
static int sctp_setsockopt_adaption_layer(struct sock *sk, char __user *optval,
int optlen)
{
- __u32 val;
+ struct sctp_setadaption adaption;
- if (optlen < sizeof(__u32))
+ if (optlen != sizeof(struct sctp_setadaption))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(__u32)))
+ if (copy_from_user(&adaption, optval, optlen))
return -EFAULT;
- sctp_sk(sk)->adaption_ind = val;
+ sctp_sk(sk)->adaption_ind = adaption.ssb_adaption_ind;
return 0;
}
@@ -3672,17 +3696,15 @@ static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
static int sctp_getsockopt_adaption_layer(struct sock *sk, int len,
char __user *optval, int __user *optlen)
{
- __u32 val;
+ struct sctp_setadaption adaption;
- if (len < sizeof(__u32))
+ if (len != sizeof(struct sctp_setadaption))
return -EINVAL;
- len = sizeof(__u32);
- val = sctp_sk(sk)->adaption_ind;
- if (put_user(len, optlen))
- return -EFAULT;
- if (copy_to_user(optval, &val, len))
+ adaption.ssb_adaption_ind = sctp_sk(sk)->adaption_ind;
+ if (copy_to_user(optval, &adaption, len))
return -EFAULT;
+
return 0;
}
@@ -4640,8 +4662,8 @@ SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *msg,
/* Minimally, validate the sinfo_flags. */
if (cmsgs->info->sinfo_flags &
- ~(MSG_UNORDERED | MSG_ADDR_OVER |
- MSG_ABORT | MSG_EOF))
+ ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
+ SCTP_ABORT | SCTP_EOF))
return -EINVAL;
break;
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 057e7fac3af..e049f41faa4 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -698,7 +698,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
event->ssn = ntohs(chunk->subh.data_hdr->ssn);
event->ppid = chunk->subh.data_hdr->ppid;
if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED) {
- event->flags |= MSG_UNORDERED;
+ event->flags |= SCTP_UNORDERED;
event->cumtsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map);
}
event->tsn = ntohl(chunk->subh.data_hdr->tsn);
@@ -824,7 +824,7 @@ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
*
* recvmsg() flags:
*
- * MSG_UNORDERED - This flag is present when the message was sent
+ * SCTP_UNORDERED - This flag is present when the message was sent
* non-ordered.
*/
sinfo.sinfo_flags = event->flags;
@@ -839,7 +839,7 @@ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
* This field will hold the current cumulative TSN as
* known by the underlying SCTP layer. Note this field is
* ignored when sending and only valid for a receive
- * operation when sinfo_flags are set to MSG_UNORDERED.
+ * operation when sinfo_flags are set to SCTP_UNORDERED.
*/
sinfo.sinfo_cumtsn = event->cumtsn;
/* sinfo_assoc_id: sizeof (sctp_assoc_t)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 02:48:53 +0000