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set IP_PMTUDISC_PROBE instead of dontFragment (i.e. PMTUDISC_DO)

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Summary:
mvfst will need to handle pmtu in an app specific way. So just set DF bits but
not pmtu.

Reviewed By: siyengar

Differential Revision: D17624134

fbshipit-source-id: 14f445bbb6a971efb8a3d550c84c3d4af53f8517
This commit is contained in:
Udip Pant
2019-09-27 13:12:56 -07:00
committed by Facebook Github Bot
parent 2bd01800f3
commit e3b792e7f1
4 changed files with 5 additions and 28 deletions
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25
quic/happyeyeballs/QuicHappyEyeballsFunctions.cpp
View File

@@ -129,30 +129,7 @@ void happyEyeballsSetUpSocket(
socket.bind(folly::SocketAddress("::", 0));
}
if (transportSettings.turnoffPMTUD) {
// TODO: Clean this up or move this into AsyncUDPSocket once we have a
// better idea of how to handle PMTU
#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_PROBE)
if (socket.address().getFamily() == AF_INET) {
int v4 = IP_PMTUDISC_PROBE;
folly::netops::setsockopt(
socket.getNetworkSocket(),
IPPROTO_IP,
IP_MTU_DISCOVER,
&v4,
sizeof(v4));
}
#endif
#if defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_PROBE)
if (socket.address().getFamily() == AF_INET6) {
int v6 = IPV6_PMTUDISC_PROBE;
folly::netops::setsockopt(
socket.getNetworkSocket(),
IPPROTO_IPV6,
IPV6_MTU_DISCOVER,
&v6,
sizeof(v6));
}
#endif
socket.setDFAndTurnOffPMTU();
} else {
socket.dontFragment(true);
}

2
quic/server/QuicServerWorker.cpp
View File

@@ -34,7 +34,7 @@ void QuicServerWorker::bind(const folly::SocketAddress& address) {
DCHECK(!supportedVersions_.empty());
CHECK(socket_);
socket_->bind(address);
socket_->dontFragment(true);
socket_->setDFAndTurnOffPMTU();
}
void QuicServerWorker::setTransportSettingsOverrideFn(

2
quic/server/QuicSharedUDPSocketFactory.h
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@@ -24,7 +24,7 @@ class QuicSharedUDPSocketFactory : public QuicUDPSocketFactory {
sock->setFD(
folly::NetworkSocket::fromFd(fd),
folly::AsyncUDPSocket::FDOwnership::SHARED);
sock->dontFragment(true);
sock->setDFAndTurnOffPMTU();
}
return sock;
}

4
quic/server/test/QuicServerTest.cpp
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@@ -67,7 +67,7 @@ class SimpleQuicServerWorkerTest : public Test {
folly::test::MockAsyncUDPSocket* rawSocket_{nullptr};
};
TEST_F(SimpleQuicServerWorkerTest, DontFragment) {
TEST_F(SimpleQuicServerWorkerTest, TurnOffPMTU) {
auto sock = std::make_unique<folly::test::MockAsyncUDPSocket>(&eventbase_);
rawSocket_ = sock.get();
DCHECK(sock->getEventBase());
@@ -79,7 +79,7 @@ TEST_F(SimpleQuicServerWorkerTest, DontFragment) {
folly::SocketAddress addr("::1", 0);
// We check versions in bind()
worker_->setSupportedVersions({QuicVersion::MVFST});
EXPECT_CALL(*rawSocket_, dontFragment(true)).Times(1);
EXPECT_CALL(*rawSocket_, setDFAndTurnOffPMTU()).Times(1);
worker_->bind(addr);
}