Author: tuexen
Date: Mon Jan 15 21:59:20 2018
New Revision: 328028
URL: https://svnweb.freebsd.org/changeset/base/328028
Log:
Don't provide a (meaningless) cmsg when proving a notification
in a recvmsg() call.
MFC after: 1 week
Modified:
head/sys/netinet/sctputil.c
Modified: head/sys/netinet/sctputil.c
==============================================================================
--- head/sys/netinet/sctputil.c Mon Jan 15 21:53:33 2018 (r328027)
+++ head/sys/netinet/sctputil.c Mon Jan 15 21:59:20 2018 (r328028)
@@ -47,7 +47,7 @@ __FBSDID("$FreeBSD$");
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp_timer.h>
-#include <netinet/sctp_indata.h>/* for sctp_deliver_data() */
+#include <netinet/sctp_indata.h>
#include <netinet/sctp_auth.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_bsd_addr.h>
@@ -6094,7 +6094,7 @@ sctp_m_free(struct mbuf *m)
return (m_free(m));
}
-void
+void
sctp_m_freem(struct mbuf *mb)
{
while (mb != NULL)
@@ -6164,6 +6164,7 @@ sctp_soreceive(struct socket *so,
struct sockaddr *from;
struct sctp_extrcvinfo sinfo;
int filling_sinfo = 1;
+ int flags;
struct sctp_inpcb *inp;
inp = (struct sctp_inpcb *)so->so_pcb;
@@ -6191,15 +6192,24 @@ sctp_soreceive(struct socket *so,
if (filling_sinfo) {
memset(&sinfo, 0, sizeof(struct sctp_extrcvinfo));
}
- error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, flagsp,
+ if (flagsp != NULL) {
+ flags = *flagsp;
+ } else {
+ flags = 0;
+ }
+ error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, &flags,
(struct sctp_sndrcvinfo *)&sinfo, filling_sinfo);
+ if (flagsp != NULL) {
+ *flagsp = flags;
+ }
if (controlp != NULL) {
/* copy back the sinfo in a CMSG format */
- if (filling_sinfo)
+ if (filling_sinfo && ((flags & MSG_NOTIFICATION) == 0)) {
*controlp = sctp_build_ctl_nchunk(inp,
(struct sctp_sndrcvinfo *)&sinfo);
- else
+ } else {
*controlp = NULL;
+ }
}
if (psa) {
/* copy back the address info */
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