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// Copyright 2013 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "platform/socket.h"
#if V8_OS_POSIX
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#endif
#include <errno.h>
#include "checks.h"
#include "once.h"
namespace v8 {
namespace internal {
#if V8_OS_WIN
static V8_DECLARE_ONCE(initialize_winsock) = V8_ONCE_INIT;
static void InitializeWinsock() {
WSADATA wsa_data;
int result = WSAStartup(MAKEWORD(1, 0), &wsa_data);
CHECK_EQ(0, result);
}
#endif // V8_OS_WIN
Socket::Socket() {
#if V8_OS_WIN
// Be sure to initialize the WinSock DLL first.
CallOnce(&initialize_winsock, &InitializeWinsock);
#endif // V8_OS_WIN
// Create the native socket handle.
native_handle_ = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
}
bool Socket::Bind(int port) {
ASSERT_GE(port, 0);
ASSERT_LT(port, 65536);
if (!IsValid()) return false;
struct sockaddr_in sin;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sin.sin_port = htons(static_cast<uint16_t>(port));
int result = ::bind(
native_handle_, reinterpret_cast<struct sockaddr*>(&sin), sizeof(sin));
return result == 0;
}
bool Socket::Listen(int backlog) {
if (!IsValid()) return false;
int result = ::listen(native_handle_, backlog);
return result == 0;
}
Socket* Socket::Accept() {
if (!IsValid()) return NULL;
while (true) {
NativeHandle native_handle = ::accept(native_handle_, NULL, NULL);
if (native_handle == kInvalidNativeHandle) {
#if V8_OS_POSIX
if (errno == EINTR) continue; // Retry after signal.
#endif
return NULL;
}
return new Socket(native_handle);
}
}
bool Socket::Connect(const char* host, const char* port) {
ASSERT_NE(NULL, host);
ASSERT_NE(NULL, port);
if (!IsValid()) return false;
// Lookup host and port.
struct addrinfo* info = NULL;
struct addrinfo hint;
memset(&hint, 0, sizeof(hint));
hint.ai_family = AF_INET;
hint.ai_socktype = SOCK_STREAM;
hint.ai_protocol = IPPROTO_TCP;
int result = ::getaddrinfo(host, port, &hint, &info);
if (result != 0) {
return false;
}
// Connect to the host on the given port.
for (struct addrinfo* ai = info; ai != NULL; ai = ai->ai_next) {
// Try to connect using this addr info.
while (true) {
result = ::connect(
native_handle_, ai->ai_addr, static_cast<int>(ai->ai_addrlen));
if (result == 0) {
freeaddrinfo(info);
return true;
}
#if V8_OS_POSIX
if (errno == EINTR) continue; // Retry after signal.
#endif
break;
}
}
freeaddrinfo(info);
return false;
}
bool Socket::Shutdown() {
if (!IsValid()) return false;
// Shutdown socket for both read and write.
#if V8_OS_POSIX
int result = ::shutdown(native_handle_, SHUT_RDWR);
::close(native_handle_);
#elif V8_OS_WIN
int result = ::shutdown(native_handle_, SD_BOTH);
::closesocket(native_handle_);
#endif
native_handle_ = kInvalidNativeHandle;
return result == 0;
}
int Socket::Send(const char* buffer, int length) {
ASSERT(length <= 0 || buffer != NULL);
if (!IsValid()) return 0;
int offset = 0;
while (offset < length) {
int result = ::send(native_handle_, buffer + offset, length - offset, 0);
if (result == 0) {
break;
} else if (result > 0) {
ASSERT(result <= length - offset);
offset += result;
} else {
#if V8_OS_POSIX
if (errno == EINTR) continue; // Retry after signal.
#endif
return 0;
}
}
return offset;
}
int Socket::Receive(char* buffer, int length) {
if (!IsValid()) return 0;
if (length <= 0) return 0;
ASSERT_NE(NULL, buffer);
while (true) {
int result = ::recv(native_handle_, buffer, length, 0);
if (result < 0) {
#if V8_OS_POSIX
if (errno == EINTR) continue; // Retry after signal.
#endif
return 0;
}
return result;
}
}
bool Socket::SetReuseAddress(bool reuse_address) {
if (!IsValid()) return 0;
int v = reuse_address ? 1 : 0;
int result = ::setsockopt(native_handle_, SOL_SOCKET, SO_REUSEADDR,
reinterpret_cast<char*>(&v), sizeof(v));
return result == 0;
}
// static
int Socket::GetLastError() {
#if V8_OS_POSIX
return errno;
#elif V8_OS_WIN
// Be sure to initialize the WinSock DLL first.
CallOnce(&initialize_winsock, &InitializeWinsock);
// Now we can safely perform WSA calls.
return ::WSAGetLastError();
#endif
}
} } // namespace v8::internal
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