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Remove fields from remote candidates that could cause crashes in GetStats

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Typically, remote candidates come from signalling and are deserialized
into C++ objects. The network_type field of these candidates is
always ADAPTER_TYPE_UNKNOWN.

However, in tests it is common to pass SDP and remote candidates as C++
objects. In this case, the network_type property of remote candidates
is preserved, so DCHECK might be triggered when GetStats is called.

Clearing fields that are not suitable as remote candidates fixes
this issue.

Bug: None
Change-Id: Ida01b0224bce5cf3e87bcad1ddaca35c9f4fffe7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/279680
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Auto-Submit: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38436}
This commit is contained in:
Byoungchan Lee 2022-10-19 02:43:18 +09:00 committed by WebRTC LUCI CQ
parent 720bc4df3d
commit 5a92577a94
3 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
api/candidate.cc
View File

@ -22,6 +22,7 @@ Candidate::Candidate()
component_(0),
priority_(0),
network_type_(rtc::ADAPTER_TYPE_UNKNOWN),
underlying_type_for_vpn_(rtc::ADAPTER_TYPE_UNKNOWN),
generation_(0),
network_id_(0),
network_cost_(0) {}
@ -46,6 +47,7 @@ Candidate::Candidate(int component,
password_(password),
type_(type),
network_type_(rtc::ADAPTER_TYPE_UNKNOWN),
underlying_type_for_vpn_(rtc::ADAPTER_TYPE_UNKNOWN),
generation_(generation),
foundation_(foundation),
network_id_(network_id),

13
pc/peer_connection.cc
View File

@ -2605,8 +2605,19 @@ void PeerConnection::AddRemoteCandidate(const std::string& mid,
const cricket::Candidate& candidate) {
RTC_DCHECK_RUN_ON(signaling_thread());
if (candidate.network_type() != rtc::ADAPTER_TYPE_UNKNOWN) {
RTC_DLOG(LS_WARNING) << "Using candidate with adapter type set - this "
"should only happen in test";
}
// Clear fields that do not make sense as remote candidates.
cricket::Candidate new_candidate(candidate);
new_candidate.set_network_type(rtc::ADAPTER_TYPE_UNKNOWN);
new_candidate.set_relay_protocol("");
new_candidate.set_underlying_type_for_vpn(rtc::ADAPTER_TYPE_UNKNOWN);
network_thread()->PostTask(SafeTask(
network_thread_safety_, [this, mid = mid, candidate = candidate] {
network_thread_safety_, [this, mid = mid, candidate = new_candidate] {
RTC_DCHECK_RUN_ON(network_thread());
std::vector<cricket::Candidate> candidates = {candidate};
RTCError error =

3
pc/rtc_stats_collector.cc
View File

@ -934,6 +934,9 @@ const std::string& ProduceIceCandidateStats(int64_t timestamp_us,
} else {
// We don't expect to know the adapter type of remote candidates.
RTC_DCHECK_EQ(rtc::ADAPTER_TYPE_UNKNOWN, candidate.network_type());
RTC_DCHECK_EQ(0, candidate.relay_protocol().compare(""));
RTC_DCHECK_EQ(rtc::ADAPTER_TYPE_UNKNOWN,
candidate.underlying_type_for_vpn());
}
candidate_stats->ip = candidate.address().ipaddr().ToString();
candidate_stats->address = candidate.address().ipaddr().ToString();