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Bug 1194817: disable PMTUD in DataChannels/SCTP, set initial MTU per spec r=tuexen

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This commit is contained in:
Randell Jesup 2015-08-21 14:19:26 -04:00
parent e318244a76
commit 4d7ef8a1e8
1 changed files with 26 additions and 0 deletions
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26
netwerk/sctp/datachannel/DataChannel.cpp
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@ -599,6 +599,32 @@ DataChannelConnection::CompleteConnect(TransportFlow *flow, TransportLayer::Stat
LOG(("Calling usrsctp_connect"));
r = usrsctp_connect(mMasterSocket, reinterpret_cast<struct sockaddr *>(&addr),
sizeof(addr));
if (r >= 0 || errno == EINPROGRESS) {
struct sctp_paddrparams paddrparams;
socklen_t opt_len;
memset(&paddrparams, 0, sizeof(struct sctp_paddrparams));
memcpy(&paddrparams.spp_address, &addr, sizeof(struct sockaddr_conn));
opt_len = (socklen_t)sizeof(struct sctp_paddrparams);
r = usrsctp_getsockopt(mMasterSocket, IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS,
&paddrparams, &opt_len);
if (r < 0) {
LOG(("usrsctp_getsockopt failed: %d", r));
} else {
// draft-ietf-rtcweb-data-channel-13 section 5: max initial MTU IPV4 1200, IPV6 1280
paddrparams.spp_pathmtu = 1200; // safe for either
paddrparams.spp_flags &= !SPP_PMTUD_ENABLE;
paddrparams.spp_flags |= SPP_PMTUD_DISABLE;
opt_len = (socklen_t)sizeof(struct sctp_paddrparams);
r = usrsctp_setsockopt(mMasterSocket, IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS,
&paddrparams, opt_len);
if (r < 0) {
LOG(("usrsctp_getsockopt failed: %d", r));
} else {
LOG(("usrsctp: PMTUD disabled, MTU set to %u", paddrparams.spp_pathmtu));
}
}
}
if (r < 0) {
if (errno == EINPROGRESS) {
// non-blocking