Author: tuexen
Date: Sat Jan 4 11:39:59 2014
New Revision: 260257
URL: http://svnweb.freebsd.org/changeset/base/260257
Log:
Fix several bugs in sctp_bindx():
* Set errno to EAFNOSUPPORT if an address is provided which is neither
AF_INET nor AF_INET6.
* Don't modify the arguments.
* Don't smash the stack when provided with a non-zero port.
* Handle the case correctly where the first address provided is
an IPv6 address.
MFC after: 3 days
Modified:
head/lib/libc/net/sctp_sys_calls.c
Modified: head/lib/libc/net/sctp_sys_calls.c
==============================================================================
--- head/lib/libc/net/sctp_sys_calls.c Sat Jan 4 10:19:21 2014
(r260256)
+++ head/lib/libc/net/sctp_sys_calls.c Sat Jan 4 11:39:59 2014
(r260257)
@@ -233,19 +233,11 @@ sctp_bindx(int sd, struct sockaddr *addr
break;
default:
/* Invalid address family specified. */
- errno = EINVAL;
+ errno = EAFNOSUPPORT;
return (-1);
}
sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len);
}
- /*
- * Now if there was a port mentioned, assure that the first address
- * has that port to make sure it fails or succeeds correctly.
- */
- if (sport) {
- sin = (struct sockaddr_in *)sa;
- sin->sin_port = sport;
- }
argsz = sizeof(struct sctp_getaddresses) +
sizeof(struct sockaddr_storage);
if ((gaddrs = (struct sctp_getaddresses *)malloc(argsz)) == NULL) {
@@ -257,6 +249,23 @@ sctp_bindx(int sd, struct sockaddr *addr
memset(gaddrs, 0, argsz);
gaddrs->sget_assoc_id = 0;
memcpy(gaddrs->addr, sa, sa->sa_len);
+ /*
+ * Now, if there was a port mentioned, assure that the first
+ * address has that port to make sure it fails or succeeds
+ * correctly.
+ */
+ if ((i == 0) && (sport != 0)) {
+ switch (gaddrs->addr->sa_family) {
+ case AF_INET:
+ sin = (struct sockaddr_in *)gaddrs->addr;
+ sin->sin_port = sport;
+ break;
+ case AF_INET6:
+ sin6 = (struct sockaddr_in6 *)gaddrs->addr;
+ sin6->sin6_port = sport;
+ break;
+ }
+ }
if (setsockopt(sd, IPPROTO_SCTP, flags, gaddrs,
(socklen_t) argsz) != 0) {
free(gaddrs);
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