int AsyncUDPSocket::connect(const folly::SocketAddress& address) {
CHECK_NE(-1, fd_) << "Socket not yet bound";
sockaddr_storage addrStorage;
address.getAddress(&addrStorage);
return fsp::connect(
fd_, reinterpret_cast<sockaddr*>(&addrStorage), address.getActualSize());
}
ssize_t AsyncUDPSocket::writev(const folly::SocketAddress& address,
const struct iovec* vec, size_t iovec_len) {
CHECK_NE(-1, fd_) << "Socket not yet bound";
sockaddr_storage addrStorage;
address.getAddress(&addrStorage);
struct msghdr msg;
msg.msg_name = reinterpret_cast<void*>(&addrStorage);
msg.msg_namelen = address.getActualSize();
msg.msg_iov = const_cast<struct iovec*>(vec);
msg.msg_iovlen = iovec_len;
msg.msg_control = nullptr;
msg.msg_controllen = 0;
msg.msg_flags = 0;
return ::sendmsg(fd_, &msg, 0);
}
ssize_t AsyncUDPSocket::writev(
const folly::SocketAddress& address,
const struct iovec* vec,
size_t iovec_len,
int gso) {
CHECK_NE(-1, fd_) << "Socket not yet bound";
sockaddr_storage addrStorage;
address.getAddress(&addrStorage);
struct msghdr msg;
msg.msg_name = reinterpret_cast<void*>(&addrStorage);
msg.msg_namelen = address.getActualSize();
msg.msg_iov = const_cast<struct iovec*>(vec);
msg.msg_iovlen = iovec_len;
msg.msg_control = nullptr;
msg.msg_controllen = 0;
msg.msg_flags = 0;
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
if (gso > 0) {
char control[CMSG_SPACE(sizeof(uint16_t))];
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
struct cmsghdr* cm = CMSG_FIRSTHDR(&msg);
cm->cmsg_level = SOL_UDP;
cm->cmsg_type = UDP_SEGMENT;
cm->cmsg_len = CMSG_LEN(sizeof(uint16_t));
uint16_t gso_len = static_cast<uint16_t>(gso);
memcpy(CMSG_DATA(cm), &gso_len, sizeof(gso_len));
return sendmsg(fd_, &msg, 0);
}
#else
CHECK_LT(gso, 1) << "GSO not supported";
#endif
return sendmsg(fd_, &msg, 0);
}
void AsyncUDPSocket::bind(const folly::SocketAddress& address) {
int socket = fsp::socket(address.getFamily(), SOCK_DGRAM, IPPROTO_UDP);
if (socket == -1) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"error creating async udp socket",
errno);
}
auto g = folly::makeGuard([&] { ::close(socket); });
// put the socket in non-blocking mode
int ret = fcntl(socket, F_SETFL, O_NONBLOCK);
if (ret != 0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to put socket in non-blocking mode",
errno);
}
if (reuseAddr_) {
// put the socket in reuse mode
int value = 1;
if (setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, &value, sizeof(value)) !=
0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to put socket in reuse mode",
errno);
}
}
if (reusePort_) {
// put the socket in port reuse mode
int value = 1;
if (setsockopt(socket, SOL_SOCKET, SO_REUSEPORT, &value, sizeof(value)) !=
0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to put socket in reuse_port mode",
errno);
}
}
if (busyPollUs_ > 0) {
#ifdef SO_BUSY_POLL
// Set busy_poll time in microseconds on the socket.
// It sets how long socket will be in busy_poll mode when no event occurs.
int value = busyPollUs_;
if (setsockopt(socket, SOL_SOCKET, SO_BUSY_POLL, &value, sizeof(value)) !=
0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to set SO_BUSY_POLL on the socket",
errno);
}
#else /* SO_BUSY_POLL is not supported*/
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN, "SO_BUSY_POLL is not supported", errno);
#endif
}
if (rcvBuf_ > 0) {
// Set the size of the buffer for the received messages in rx_queues.
int value = rcvBuf_;
if (setsockopt(socket, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) != 0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to set SO_RCVBUF on the socket",
errno);
}
}
if (sndBuf_ > 0) {
// Set the size of the buffer for the sent messages in tx_queues.
int value = rcvBuf_;
if (setsockopt(socket, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) != 0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to set SO_SNDBUF on the socket",
errno);
}
}
// If we're using IPv6, make sure we don't accept V4-mapped connections
if (address.getFamily() == AF_INET6) {
int flag = 1;
if (setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag))) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN, "Failed to set IPV6_V6ONLY", errno);
}
}
// bind to the address
sockaddr_storage addrStorage;
address.getAddress(&addrStorage);
sockaddr* saddr = reinterpret_cast<sockaddr*>(&addrStorage);
if (fsp::bind(socket, saddr, address.getActualSize()) != 0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to bind the async udp socket for:" + address.describe(),
errno);
}
// success
g.dismiss();
fd_ = socket;
ownership_ = FDOwnership::OWNS;
// attach to EventHandler
EventHandler::changeHandlerFD(fd_);
if (address.getPort() != 0) {
localAddress_ = address;
} else {
localAddress_.setFromLocalAddress(fd_);
}
}
void AsyncUDPSocket::bind(const folly::SocketAddress& address) {
int socket = fsp::socket(address.getFamily(), SOCK_DGRAM, IPPROTO_UDP);
if (socket == -1) {
throw AsyncSocketException(AsyncSocketException::NOT_OPEN,
"error creating async udp socket",
errno);
}
auto g = folly::makeGuard([&] { ::close(socket); });
// put the socket in non-blocking mode
int ret = fcntl(socket, F_SETFL, O_NONBLOCK);
if (ret != 0) {
throw AsyncSocketException(AsyncSocketException::NOT_OPEN,
"failed to put socket in non-blocking mode",
errno);
}
if (reuseAddr_) {
// put the socket in reuse mode
int value = 1;
if (setsockopt(socket,
SOL_SOCKET,
SO_REUSEADDR,
&value,
sizeof(value)) != 0) {
throw AsyncSocketException(AsyncSocketException::NOT_OPEN,
"failed to put socket in reuse mode",
errno);
}
}
if (reusePort_) {
// put the socket in port reuse mode
int value = 1;
if (setsockopt(socket,
SOL_SOCKET,
SO_REUSEPORT,
&value,
sizeof(value)) != 0) {
throw AsyncSocketException(AsyncSocketException::NOT_OPEN,
"failed to put socket in reuse_port mode",
errno);
}
}
// If we're using IPv6, make sure we don't accept V4-mapped connections
if (address.getFamily() == AF_INET6) {
int flag = 1;
if (setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag))) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"Failed to set IPV6_V6ONLY",
errno);
}
}
// bind to the address
sockaddr_storage addrStorage;
address.getAddress(&addrStorage);
sockaddr* saddr = reinterpret_cast<sockaddr*>(&addrStorage);
if (fsp::bind(socket, saddr, address.getActualSize()) != 0) {
throw AsyncSocketException(
AsyncSocketException::NOT_OPEN,
"failed to bind the async udp socket for:" + address.describe(),
errno);
}
// success
g.dismiss();
fd_ = socket;
ownership_ = FDOwnership::OWNS;
// attach to EventHandler
EventHandler::changeHandlerFD(fd_);
if (address.getPort() != 0) {
localAddress_ = address;
} else {
localAddress_.setFromLocalAddress(fd_);
}
}