From c403081641a89853043ee3cd55ab1d04e2f4b47e Mon Sep 17 00:00:00 2001
From: Philipp Hancke <philipp.hancke@vonage.com>
Date: Fri, 26 Jun 2020 08:24:38 +0200
Subject: [PATCH] sdp: use exact match in parseMediaDescription

BUG=webrtc:11718

Change-Id: Ifd05eb6511bcd2a0ee77c430cf3bccbb6e3f905c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178180
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31571}
---
 pc/webrtc_sdp.cc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pc/webrtc_sdp.cc b/pc/webrtc_sdp.cc
index 90a00c1479..fb644e0638 100644
--- a/pc/webrtc_sdp.cc
+++ b/pc/webrtc_sdp.cc
@@ -2656,17 +2656,18 @@ bool ParseMediaDescription(
     std::string content_name;
     bool bundle_only = false;
     int section_msid_signaling = 0;
-    if (HasAttribute(line, kMediaTypeVideo)) {
+    std::string mediaType = fields[0];
+    if (mediaType == kMediaTypeVideo) {
       content = ParseContentDescription<VideoContentDescription>(
           message, cricket::MEDIA_TYPE_VIDEO, mline_index, protocol,
           payload_types, pos, &content_name, &bundle_only,
           &section_msid_signaling, &transport, candidates, error);
-    } else if (HasAttribute(line, kMediaTypeAudio)) {
+    } else if (mediaType == kMediaTypeAudio) {
       content = ParseContentDescription<AudioContentDescription>(
           message, cricket::MEDIA_TYPE_AUDIO, mline_index, protocol,
           payload_types, pos, &content_name, &bundle_only,
           &section_msid_signaling, &transport, candidates, error);
-    } else if (HasAttribute(line, kMediaTypeData)) {
+    } else if (mediaType == kMediaTypeData) {
       if (cricket::IsDtlsSctp(protocol)) {
         // The draft-03 format is:
         // m=application <port> DTLS/SCTP <sctp-port>...