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Bug 1188435 - Check if sendto is implemented. r=mcmanus

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This commit is contained in:
Dragana Damjanovic 2017-05-04 12:14:36 +02:00
parent abf0402f0a
commit 33ad6af7aa
1 changed files with 13 additions and 1 deletions
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14
netwerk/base/TCPFastOpenLayer.cpp
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@ -359,7 +359,13 @@ TCPFastOpenFinish(PRFileDesc * fd, PRErrorCode *err,
*fastOpenNotSupported = false;
PRErrorCode result = 0;
if (!secret->mFirstPacketBufLen) {
// If we do not have data to send with syn packet or nspr version does not
// have sendto implemented we will call normal connect.
// If sendto is not implemented it points to _PR_InvalidInt, therefore we
// check if sendto != _PR_InvalidInt. _PR_InvalidInt is exposed so we use
// reserved_fn_0 which also points to _PR_InvalidInt.
if (!secret->mFirstPacketBufLen ||
(tfoFd->lower->methods->sendto == (PRSendtoFN)tfoFd->lower->methods->reserved_fn_0)) {
// Because of the way our nsHttpTransaction dispatch work, it can happened
// that data has not been written into the socket.
// In this case we can just call connect.
@ -370,6 +376,12 @@ TCPFastOpenFinish(PRFileDesc * fd, PRErrorCode *err,
} else {
result = PR_GetError();
}
if (tfoFd->lower->methods->sendto == (PRSendtoFN)tfoFd->lower->methods->reserved_fn_0) {
// sendto is not implemented, it is equal to _PR_InvalidInt!
// We will disable Fast Open.
SOCKET_LOG(("TCPFastOpenFinish - sendto not implemented.\n"));
*fastOpenNotSupported = true;
}
} else {
// We have some data ready in the buffer we will send it with the syn
// packet.