Report checksum failures as such (bug #1942)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3350 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -7168,7 +7168,9 @@ static int sipsock_read(int *id, int fd, short events, void *ignore)
 	memset(&req, 0, sizeof(req));
 	res = recvfrom(sipsock, req.data, sizeof(req.data) - 1, 0, (struct sockaddr *)&sin, &len);
 	if (res < 0) {
-		if (errno != ECONNREFUSED)
+		if (errno == EAGAIN)
+			ast_log(LOG_NOTICE, "SIP: Received packet with bad UDP checksum\n");
+		else if (errno != ECONNREFUSED)
 			ast_log(LOG_WARNING, "Recv error: %s\n", strerror(errno));
 		return 1;
 	}

rtp.c

@@ -346,7 +346,10 @@ struct ast_frame *ast_rtcp_read(struct ast_rtp *rtp)
 					0, (struct sockaddr *)&sin, &len);
 	
 	if (res < 0) {
-		ast_log(LOG_WARNING, "RTP Read error: %s\n", strerror(errno));
+		if (errno == EAGAIN)
+			ast_log(LOG_NOTICE, "RTP: Received packet with bad UDP checksum\n");
+		else
+			ast_log(LOG_WARNING, "RTP Read error: %s\n", strerror(errno));
 		if (errno == EBADF)
 			CRASH;
 		return &null_frame;