Add option to disable checksums on RTP UDP ports (bug #2068)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3464 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/configs/rtp.conf.sample b/configs/rtp.conf.sample
index 01a6dea..76327cd 100755 (executable)
--- a/configs/rtp.conf.sample
+++ b/configs/rtp.conf.sample
@@ -7,3 +7,7 @@
 ;
 rtpstart=10000
 rtpend=20000
+;
+; Whether to enable or disable UDP checksums on RTP traffic
+;
+;rtpchecksums=no

diff --git a/rtp.c b/rtp.c
index 9cfb118..2b7dec0 100755 (executable)
--- a/rtp.c
+++ b/rtp.c
@@ -52,6 +52,7 @@ static int dtmftimeout = 3000;        /* 3000 samples */
 
 static int rtpstart = 0;
 static int rtpend = 0;
+static int checksums = 1;
 
 /* The value of each payload format mapping: */
 struct rtpPayloadType {
@@ -765,6 +766,9 @@ static int rtp_socket(void)
        if (s > -1) {
                flags = fcntl(s, F_GETFL);
                fcntl(s, F_SETFL, flags | O_NONBLOCK);
+               if (checksums) {
+                       setsockopt(s, SOL_SOCKET, SO_NO_CHECK, &checksums, sizeof(checksums));
+               }
        }
        return s;
 }
@@ -1490,6 +1494,7 @@ void ast_rtp_reload(void)
        char *s;
        rtpstart = 5000;
        rtpend = 31000;
+       checksums = 1;
        cfg = ast_load("rtp.conf");
        if (cfg) {
                if ((s = ast_variable_retrieve(cfg, "general", "rtpstart"))) {
@@ -1506,6 +1511,12 @@ void ast_rtp_reload(void)
                        if (rtpend > 65535)
                                rtpend = 65535;
                }
+               if ((s = ast_variable_retrieve(cfg, "general", "rtpchecksums"))) {
+                       if (ast_true(s))
+                               checksums = 1;
+                       else
+                               checksums = 0;
+               }
                ast_destroy(cfg);
        }
        if (rtpstart >= rtpend) {