Merged revisions 69992 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r69992 | file | 2007-06-19 13:00:58 -0400 (Tue, 19 Jun 2007) | 2 lines

Handle the CC field in the RTP header. (issue #9384 reported by DoodleHu)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@70003 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/rtp.c b/main/rtp.c
index 01e7664c3248358b8ba3552c24625d49f7ba0f9a..41e2317073ebad2e87bbc62fe7de33a134cbf7d4 100644 (file)
--- a/main/rtp.c
+++ b/main/rtp.c
@@ -1047,18 +1047,13 @@ static void calc_rxstamp(struct timeval *tv, struct ast_rtp *rtp, unsigned int t
 /*! \brief Perform a Packet2Packet RTP write */
 static int bridge_p2p_rtp_write(struct ast_rtp *rtp, struct ast_rtp *bridged, unsigned int *rtpheader, int len, int hdrlen)
 {
-       int res = 0, payload = 0, bridged_payload = 0, version, padding, mark, ext;
+       int res = 0, payload = 0, bridged_payload = 0, mark;
        struct rtpPayloadType rtpPT;
-       unsigned int seqno;
-       
+       int reconstruct = ntohl(rtpheader[0]);
+
        /* Get fields from packet */
-       seqno = ntohl(rtpheader[0]);
-       version = (seqno & 0xC0000000) >> 30;
-       payload = (seqno & 0x7f0000) >> 16;
-       padding = seqno & (1 << 29);
-       mark = (seqno & 0x800000) >> 23;
-       ext = seqno & (1 << 28);
-       seqno &= 0xffff;
+       payload = (reconstruct & 0x7f0000) >> 16;
+       mark = (((reconstruct & 0x800000) >> 23) != 0);
 
        /* Check what the payload value should be */
        rtpPT = ast_rtp_lookup_pt(rtp, payload);
@@ -1077,7 +1072,10 @@ static int bridge_p2p_rtp_write(struct ast_rtp *rtp, struct ast_rtp *bridged, un
        }
 
        /* Reconstruct part of the packet */
-       rtpheader[0] = htonl((version << 30) | (mark << 23) | (bridged_payload << 16) | (seqno));
+       reconstruct &= 0xFF80FFFF;
+       reconstruct |= (bridged_payload << 16);
+       reconstruct |= (mark << 23);
+       rtpheader[0] = htonl(reconstruct);
 
        /* Send the packet back out */
        res = sendto(bridged->s, (void *)rtpheader, len, 0, (struct sockaddr *)&bridged->them, sizeof(bridged->them));
@@ -1108,6 +1106,7 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
        int padding;
        int mark;
        int ext;
+       int cc;
        unsigned int ssrc;
        unsigned int timestamp;
        unsigned int *rtpheader;
@@ -1186,6 +1185,7 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
        padding = seqno & (1 << 29);
        mark = seqno & (1 << 23);
        ext = seqno & (1 << 28);
+       cc = (seqno & 0xF000000) >> 24;
        seqno &= 0xffff;
        timestamp = ntohl(rtpheader[1]);
        ssrc = ntohl(rtpheader[2]);
@@ -1203,10 +1203,15 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
                res -= rtp->rawdata[AST_FRIENDLY_OFFSET + res - 1];
        }
        
+       if (cc) {
+               /* CSRC fields present */
+               hdrlen += cc*4;
+       }
+
        if (ext) {
                /* RTP Extension present */
+               hdrlen += (ntohl(rtpheader[hdrlen/4]) & 0xffff) << 2;
                hdrlen += 4;
-               hdrlen += (ntohl(rtpheader[3]) & 0xffff) << 2;
        }
 
        if (res < hdrlen) {