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MT#55283 trigger rekernel for SSRC-less streams
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If a stream has been pushed to the kernel from anything other than RTP,
even though RTP is expected, we get a forwarding entries without any
SSRCs. This is valid, but once actual RTP is received, it needs to be
passed on to user space, so that SSRC contexts can be set up.

Possible fix for #1855

Change-Id: I51b82d3cf79cf66780fdde154bebe56e0f43174b
(cherry picked from commit a0b705e)
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rfuchs committed Sep 5, 2024
1 parent 86cd5f2 commit 48bae07
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Showing 3 changed files with 3 additions and 1 deletion.
1 change: 1 addition & 0 deletions daemon/media_socket.c
Original file line number Diff line number Diff line change
Expand Up @@ -1490,6 +1490,7 @@ static const char *kernelize_one(struct rtpengine_target_info *reti, GQueue *out

if (proto_is_rtp(media->protocol)) {
reti->rtp = 1;
reti->ssrc_req = 1;
if (!ML_ISSET(media->monologue, TRANSCODING)) {
reti->rtcp_fw = 1;
if (media->protocol->avpf)
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2 changes: 1 addition & 1 deletion kernel-module/xt_RTPENGINE.c
Original file line number Diff line number Diff line change
Expand Up @@ -5426,7 +5426,7 @@ static unsigned int rtpengine46(struct sk_buff *skb, struct sk_buff *oskb,
// Look for matching SSRC index if any SSRC were given
ssrc_idx = target_find_ssrc(g, rtp.rtp_header->ssrc);
errstr = "SSRC mismatch";
if (ssrc_idx == -2)
if (ssrc_idx == -2 || (ssrc_idx == -1 && g->target.ssrc_req))
goto out_error;

pkt_idx = rtp_packet_index(&g->decrypt_rtp, &g->target.decrypt, rtp.rtp_header, ssrc_idx);
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1 change: 1 addition & 0 deletions kernel-module/xt_RTPENGINE.h
Original file line number Diff line number Diff line change
Expand Up @@ -123,6 +123,7 @@ struct rtpengine_target_info {
dtls:1,
stun:1,
rtp:1,
ssrc_req:1,
rtp_only:1,
track_ssrc:1,
rtcp:1,
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