[FFmpeg-devel] [PATCH 2/2] avformat/whip: check the exchange sdp url is start with http

[Steven Liu <lq@chinaffmpeg.org>]

Make sure the WHIP protocol performs the SDP offer/answer
exchange with the WebRTC peer over HTTP.

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
---
 libavformat/whip.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libavformat/whip.c b/libavformat/whip.c
index ce06a66bc4..b78ad27858 100644
--- a/libavformat/whip.c
+++ b/libavformat/whip.c
@@ -732,10 +732,18 @@ static int exchange_sdp(AVFormatContext *s)
     URLContext *whip_uc = NULL;
     AVDictionary *opts = NULL;
     char *hex_data = NULL;
+    const char *proto_name = avio_find_protocol_name(s->url);
 
     /* To prevent a crash during cleanup, always initialize it. */
     av_bprint_init(&bp, 1, MAX_SDP_SIZE);
 
+    if (!av_strstart(proto_name, "http", NULL)) {
+        av_log(whip, AV_LOG_ERROR, "WHIP: Protocol %s is not supported by RTC, choose http, url is %s\n",
+            proto_name, s->url);
+        ret = AVERROR(EINVAL);
+        goto end;
+    }
+
     if (!whip->sdp_offer || !strlen(whip->sdp_offer)) {
         av_log(whip, AV_LOG_ERROR, "WHIP: No offer to exchange\n");
         ret = AVERROR(EINVAL);
-- 
2.39.3 (Apple Git-146)

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