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ntsi::StreamSocket::bind parameter reuseAddress is inconsistent on different platforms #169
Description
The behavior of the method seems to be different on AIX and Linux:
auto err = socket1->bind(ntsa::Endpoint(ntsa::Ipv4Endpoint("127.0.0.1", 0)), true);
assert(!err);
ntsa::Endpoint endpoint;
socket->sourceEndpoint(&endpoint);
err = socket2->bind(ntsa::Endpoint(ntsa::Ipv4Endpoint("127.0.0.1", 0)), true);
assert(!err);
// on AIX the second bind succeeds, while on Linux this fails.I attached the relevant code in ntsu_socketoptionutil.cpp below. I think SO_REUSEPORT is required for the above code to work on Linux.
I understand making the behavior consistent on all support platform might be very difficult or impossible, so it's not a straight forward fix.
ntsa::Error SocketOptionUtil::setReuseAddress(ntsa::Handle socket,
bool reuseAddress)
{
{
int optionValue = static_cast<int>(reuseAddress);
int rc = setsockopt(socket,
SOL_SOCKET,
SO_REUSEADDR,
reinterpret_cast<char*>(&optionValue),
sizeof(optionValue));
if (rc != 0) {
return ntsa::Error(errno);
}
}
#if defined(BSLS_PLATFORM_OS_AIX) || defined(BSLS_PLATFORM_OS_DARWIN) || \
defined(BSLS_PLATFORM_OS_FREEBSD)
{
int optionValue = static_cast<int>(reuseAddress);
int rc = setsockopt(socket,
SOL_SOCKET,
SO_REUSEPORT,
reinterpret_cast<char*>(&optionValue),
sizeof(optionValue));
if (rc != 0) {
return ntsa::Error(errno);
}
}
#endif
return ntsa::Error();
}
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