[asterisk-commits] kpfleming: branch 1.4 r44956 - in /branches/1.4: ./ channels/ include/asteris...

[asterisk-commits at lists.digium.com]

Author: kpfleming
Date: Thu Oct 12 13:38:51 2006
New Revision: 44956

URL: http://svn.digium.com/view/asterisk?rev=44956&view=rev
Log:
Merged revisions 44955 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r44955 | kpfleming | 2006-10-12 13:31:26 -0500 (Thu, 12 Oct 2006) | 2 lines

ensure that IAX2 and SIP sockets allow UDP fragmentation when running on Linux (thanks to Brian Candler on the asterisk-dev list for the tip)

........

Modified:
    branches/1.4/   (props changed)
    branches/1.4/channels/chan_sip.c
    branches/1.4/include/asterisk/utils.h
    branches/1.4/main/netsock.c
    branches/1.4/main/utils.c

Propchange: branches/1.4/
------------------------------------------------------------------------------
Binary property 'branch-1.2-merged' - no diff available.

Modified: branches/1.4/channels/chan_sip.c
URL: http://svn.digium.com/view/asterisk/branches/1.4/channels/chan_sip.c?rev=44956&r1=44955&r2=44956&view=diff
==============================================================================
--- branches/1.4/channels/chan_sip.c (original)
+++ branches/1.4/channels/chan_sip.c Thu Oct 12 13:38:51 2006
@@ -16107,9 +16107,12 @@
 		} else {
 			/* Allow SIP clients on the same host to access us: */
 			const int reuseFlag = 1;
+
 			setsockopt(sipsock, SOL_SOCKET, SO_REUSEADDR,
 				   (const char*)&reuseFlag,
 				   sizeof reuseFlag);
+
+			ast_enable_packet_fragmentation(sipsock);
 
 			if (bind(sipsock, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) < 0) {
 				ast_log(LOG_WARNING, "Failed to bind to %s:%d: %s\n",

Modified: branches/1.4/include/asterisk/utils.h
URL: http://svn.digium.com/view/asterisk/branches/1.4/include/asterisk/utils.h?rev=44956&r1=44955&r2=44956&view=diff
==============================================================================
--- branches/1.4/include/asterisk/utils.h (original)
+++ branches/1.4/include/asterisk/utils.h Thu Oct 12 13:38:51 2006
@@ -515,4 +515,19 @@
 	}))
 #endif
 
+/*!
+  \brief Disable PMTU discovery on a socket
+  \param sock The socket to manipulate
+  \return Nothing
+
+  On Linux, UDP sockets default to sending packets with the Dont Fragment (DF)
+  bit set. This is supposedly done to allow the application to do PMTU
+  discovery, but Asterisk does not do this.
+
+  Because of this, UDP packets sent by Asterisk that are larger than the MTU
+  of any hop in the path will be lost. This function can be called on a socket
+  to ensure that the DF bit will not be set.
+ */
+void ast_enable_packet_fragmentation(int sock);
+
 #endif /* _ASTERISK_UTILS_H */

Modified: branches/1.4/main/netsock.c
URL: http://svn.digium.com/view/asterisk/branches/1.4/main/netsock.c?rev=44956&r1=44955&r2=44956&view=diff
==============================================================================
--- branches/1.4/main/netsock.c (original)
+++ branches/1.4/main/netsock.c Thu Oct 12 13:38:51 2006
@@ -144,6 +144,8 @@
 	if (setsockopt(netsocket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))) 
 		ast_log(LOG_WARNING, "Unable to set TOS to %d\n", tos);
 
+	ast_enable_packet_fragmentation(netsocket);
+
 	if (!(ns = ast_calloc(1, sizeof(struct ast_netsock)))) {
 		close(netsocket);
 		return NULL;

Modified: branches/1.4/main/utils.c
URL: http://svn.digium.com/view/asterisk/branches/1.4/main/utils.c?rev=44956&r1=44955&r2=44956&view=diff
==============================================================================
--- branches/1.4/main/utils.c (original)
+++ branches/1.4/main/utils.c Thu Oct 12 13:38:51 2006
@@ -984,3 +984,13 @@
 
 	return res;
 }
+
+void ast_enable_packet_fragmentation(int sock)
+{
+#ifdef __linux__
+	int val = IP_PMTUDISC_DONT;
+	
+	if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
+		ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
+#endif
+}