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// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
// for details. 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/globals.h"
#if defined(DART_HOST_OS_FUCHSIA)
#include "bin/socket_base.h"
#include <errno.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <netinet/tcp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <vector>
#include "bin/eventhandler.h"
#include "bin/fdutils.h"
#include "bin/file.h"
#include "bin/socket_base_fuchsia.h"
#include "platform/signal_blocker.h"
// #define SOCKET_LOG_INFO 1
// #define SOCKET_LOG_ERROR 1
// define SOCKET_LOG_ERROR to get log messages only for errors.
// define SOCKET_LOG_INFO to get log messages for both information and errors.
#if defined(SOCKET_LOG_INFO) || defined(SOCKET_LOG_ERROR)
#define LOG_ERR(msg, ...) \
{ \
int err = errno; \
Syslog::PrintErr("Dart Socket ERROR: %s:%d: " msg, __FILE__, __LINE__, \
##__VA_ARGS__); \
errno = err; \
}
#if defined(SOCKET_LOG_INFO)
#define LOG_INFO(msg, ...) \
Syslog::Print("Dart Socket INFO: %s:%d: " msg, __FILE__, __LINE__, \
##__VA_ARGS__)
#else
#define LOG_INFO(msg, ...)
#endif // defined(SOCKET_LOG_INFO)
#else
#define LOG_ERR(msg, ...)
#define LOG_INFO(msg, ...)
#endif // defined(SOCKET_LOG_INFO) || defined(SOCKET_LOG_ERROR)
namespace dart {
namespace bin {
SocketAddress::SocketAddress(struct sockaddr* sa, bool unnamed_unix_socket) {
// Fuchsia does not support unix domain sockets.
if (unnamed_unix_socket) {
FATAL("Fuchsia does not support unix domain sockets.");
}
ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
if (!SocketBase::FormatNumericAddress(*reinterpret_cast<RawAddr*>(sa),
as_string_, INET6_ADDRSTRLEN)) {
as_string_[0] = 0;
}
socklen_t salen = GetAddrLength(*reinterpret_cast<RawAddr*>(sa));
memmove(reinterpret_cast<void*>(&addr_), sa, salen);
}
bool SocketBase::Initialize() {
// Nothing to do on Fuchsia.
return true;
}
bool SocketBase::FormatNumericAddress(const RawAddr& addr,
char* address,
int len) {
socklen_t salen = SocketAddress::GetAddrLength(addr);
LOG_INFO("SocketBase::FormatNumericAddress: calling getnameinfo\n");
return (NO_RETRY_EXPECTED(getnameinfo(&addr.addr, salen, address, len,
nullptr, 0, NI_NUMERICHOST) == 0));
}
bool SocketBase::IsBindError(intptr_t error_number) {
return error_number == EADDRINUSE || error_number == EADDRNOTAVAIL ||
error_number == EINVAL;
}
intptr_t SocketBase::Available(intptr_t fd) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
return handle->AvailableBytes();
}
intptr_t SocketBase::Read(intptr_t fd,
void* buffer,
intptr_t num_bytes,
SocketOpKind sync) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
ASSERT(handle->fd() >= 0);
LOG_INFO("SocketBase::Read: calling read(%ld, %p, %ld)\n", handle->fd(),
buffer, num_bytes);
intptr_t read_bytes = handle->Read(buffer, num_bytes);
ASSERT(EAGAIN == EWOULDBLOCK);
if ((sync == kAsync) && (read_bytes == -1) && (errno == EWOULDBLOCK)) {
// If the read would block we need to retry and therefore return 0
// as the number of bytes written.
read_bytes = 0;
} else if (read_bytes == -1) {
LOG_ERR("SocketBase::Read: read(%ld, %p, %ld) failed\n", handle->fd(),
buffer, num_bytes);
} else {
LOG_INFO("SocketBase::Read: read(%ld, %p, %ld) succeeded\n", handle->fd(),
buffer, num_bytes);
}
return read_bytes;
}
intptr_t SocketBase::RecvFrom(intptr_t fd,
void* buffer,
intptr_t num_bytes,
RawAddr* addr,
SocketOpKind sync) {
errno = ENOSYS;
return -1;
}
bool SocketControlMessage::is_file_descriptors_control_message() {
return false;
}
intptr_t SocketBase::ReceiveMessage(intptr_t fd,
void* buffer,
int64_t* p_buffer_num_bytes,
SocketControlMessage** p_messages,
SocketOpKind sync,
OSError* p_oserror) {
errno = ENOSYS;
return -1;
}
bool SocketBase::AvailableDatagram(intptr_t fd,
void* buffer,
intptr_t num_bytes) {
return false;
}
intptr_t SocketBase::WriteImpl(intptr_t fd,
const void* buffer,
intptr_t num_bytes,
SocketOpKind sync) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
ASSERT(handle->fd() >= 0);
LOG_INFO("SocketBase::WriteImpl: calling write(%ld, %p, %ld)\n", handle->fd(),
buffer, num_bytes);
intptr_t written_bytes = handle->Write(buffer, num_bytes);
if (written_bytes == -1 && !(sync == kAsync && errno == EWOULDBLOCK)) {
LOG_ERR("SocketBase::WriteImpl: write(%ld, %p, %ld) failed\n", handle->fd(),
buffer, num_bytes);
} else {
LOG_INFO("SocketBase::WriteImpl: write(%ld, %p, %ld) succeeded\n",
handle->fd(), buffer, num_bytes);
}
return written_bytes;
}
intptr_t SocketBase::SendTo(intptr_t fd,
const void* buffer,
intptr_t num_bytes,
const RawAddr& addr,
SocketOpKind sync) {
errno = ENOSYS;
return -1;
}
intptr_t SocketBase::SendMessage(intptr_t fd,
void* buffer,
size_t num_bytes,
SocketControlMessage* messages,
intptr_t num_messages,
SocketOpKind sync,
OSError* p_oserror) {
errno = ENOSYS;
return -1;
}
bool SocketBase::GetSocketName(intptr_t fd, SocketAddress* p_sa) {
ASSERT(fd >= 0);
ASSERT(p_sa != nullptr);
RawAddr raw;
socklen_t size = sizeof(raw);
if (NO_RETRY_EXPECTED(getsockname(fd, &raw.addr, &size))) {
return false;
}
// sockaddr_un contains sa_family_t sun_family and char[] sun_path.
// If size is the size of sa_family_t, this is an unnamed socket and
// sun_path contains garbage.
new (p_sa) SocketAddress(&raw.addr,
/*unnamed_unix_socket=*/size == sizeof(sa_family_t));
return true;
}
intptr_t SocketBase::GetPort(intptr_t fd) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
ASSERT(handle->fd() >= 0);
RawAddr raw;
socklen_t size = sizeof(raw);
LOG_INFO("SocketBase::GetPort: calling getsockname(%ld)\n", handle->fd());
if (NO_RETRY_EXPECTED(getsockname(handle->fd(), &raw.addr, &size))) {
return 0;
}
return SocketAddress::GetAddrPort(raw);
}
SocketAddress* SocketBase::GetRemotePeer(intptr_t fd, intptr_t* port) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
ASSERT(handle->fd() >= 0);
RawAddr raw;
socklen_t size = sizeof(raw);
if (NO_RETRY_EXPECTED(getpeername(handle->fd(), &raw.addr, &size))) {
return nullptr;
}
*port = SocketAddress::GetAddrPort(raw);
return new SocketAddress(&raw.addr);
}
void SocketBase::GetError(intptr_t fd, OSError* os_error) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
ASSERT(handle->fd() >= 0);
int len = sizeof(errno);
int err = 0;
VOID_NO_RETRY_EXPECTED(getsockopt(handle->fd(), SOL_SOCKET, SO_ERROR, &err,
reinterpret_cast<socklen_t*>(&len)));
errno = err;
os_error->SetCodeAndMessage(OSError::kSystem, errno);
}
int SocketBase::GetType(intptr_t fd) {
errno = ENOSYS;
return -1;
}
intptr_t SocketBase::GetStdioHandle(intptr_t num) {
return num;
}
AddressList<SocketAddress>* SocketBase::LookupAddress(const char* host,
int type,
OSError** os_error) {
// Perform a name lookup for a host name.
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = SocketAddress::FromType(type);
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_ADDRCONFIG;
hints.ai_protocol = IPPROTO_TCP;
struct addrinfo* info = nullptr;
LOG_INFO("SocketBase::LookupAddress: calling getaddrinfo\n");
int status = NO_RETRY_EXPECTED(getaddrinfo(host, nullptr, &hints, &info));
if (status != 0) {
// We failed, try without AI_ADDRCONFIG. This can happen when looking up
// e.g. '::1', when there are no global IPv6 addresses.
hints.ai_flags = 0;
LOG_INFO("SocketBase::LookupAddress: calling getaddrinfo again\n");
status = NO_RETRY_EXPECTED(getaddrinfo(host, nullptr, &hints, &info));
if (status != 0) {
ASSERT(*os_error == nullptr);
*os_error =
new OSError(status, gai_strerror(status), OSError::kGetAddressInfo);
return nullptr;
}
}
intptr_t count = 0;
for (struct addrinfo* c = info; c != nullptr; c = c->ai_next) {
if ((c->ai_family == AF_INET) || (c->ai_family == AF_INET6)) {
count++;
}
}
intptr_t i = 0;
AddressList<SocketAddress>* addresses = new AddressList<SocketAddress>(count);
for (struct addrinfo* c = info; c != nullptr; c = c->ai_next) {
if ((c->ai_family == AF_INET) || (c->ai_family == AF_INET6)) {
addresses->SetAt(i, new SocketAddress(c->ai_addr));
i++;
}
}
freeaddrinfo(info);
return addresses;
}
bool SocketBase::ReverseLookup(const RawAddr& addr,
char* host,
intptr_t host_len,
OSError** os_error) {
errno = ENOSYS;
return false;
}
bool SocketBase::ParseAddress(int type, const char* address, RawAddr* addr) {
int result;
if (type == SocketAddress::TYPE_IPV4) {
result = NO_RETRY_EXPECTED(inet_pton(AF_INET, address, &addr->in.sin_addr));
} else {
ASSERT(type == SocketAddress::TYPE_IPV6);
result =
NO_RETRY_EXPECTED(inet_pton(AF_INET6, address, &addr->in6.sin6_addr));
}
return (result == 1);
}
bool SocketBase::RawAddrToString(RawAddr* addr, char* str) {
if (addr->addr.sa_family == AF_INET) {
return inet_ntop(AF_INET, &addr->in.sin_addr, str, INET_ADDRSTRLEN) !=
nullptr;
} else {
ASSERT(addr->addr.sa_family == AF_INET6);
return inet_ntop(AF_INET6, &addr->in6.sin6_addr, str, INET6_ADDRSTRLEN) !=
nullptr;
}
}
static bool ShouldIncludeIfaAddrs(struct ifaddrs* ifa, int lookup_family) {
if (ifa->ifa_addr == nullptr) {
// OpenVPN's virtual device tun0.
return false;
}
int family = ifa->ifa_addr->sa_family;
return ((lookup_family == family) ||
(((lookup_family == AF_UNSPEC) &&
((family == AF_INET) || (family == AF_INET6)))));
}
AddressList<InterfaceSocketAddress>* SocketBase::ListInterfaces(
int type,
OSError** os_error) {
struct ifaddrs* ifaddr;
int status = NO_RETRY_EXPECTED(getifaddrs(&ifaddr));
if (status != 0) {
ASSERT(*os_error == nullptr);
*os_error =
new OSError(status, gai_strerror(status), OSError::kGetAddressInfo);
return nullptr;
}
int lookup_family = SocketAddress::FromType(type);
intptr_t count = 0;
for (struct ifaddrs* ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
if (ShouldIncludeIfaAddrs(ifa, lookup_family)) {
count++;
}
}
AddressList<InterfaceSocketAddress>* addresses =
new AddressList<InterfaceSocketAddress>(count);
int i = 0;
for (struct ifaddrs* ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
if (ShouldIncludeIfaAddrs(ifa, lookup_family)) {
char* ifa_name = DartUtils::ScopedCopyCString(ifa->ifa_name);
addresses->SetAt(
i, new InterfaceSocketAddress(ifa->ifa_addr, ifa_name,
if_nametoindex(ifa->ifa_name)));
i++;
}
}
freeifaddrs(ifaddr);
return addresses;
}
void SocketBase::Close(intptr_t fd) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
ASSERT(handle->fd() >= 0);
NO_RETRY_EXPECTED(close(handle->fd()));
}
bool SocketBase::GetNoDelay(intptr_t fd, bool* enabled) {
errno = ENOSYS;
return false;
}
bool SocketBase::SetNoDelay(intptr_t fd, bool enabled) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
int on = enabled ? 1 : 0;
return NO_RETRY_EXPECTED(setsockopt(handle->fd(), IPPROTO_TCP, TCP_NODELAY,
reinterpret_cast<char*>(&on),
sizeof(on))) == 0;
}
bool SocketBase::GetMulticastLoop(intptr_t fd,
intptr_t protocol,
bool* enabled) {
errno = ENOSYS;
return false;
}
bool SocketBase::SetMulticastLoop(intptr_t fd,
intptr_t protocol,
bool enabled) {
errno = ENOSYS;
return false;
}
bool SocketBase::GetMulticastHops(intptr_t fd, intptr_t protocol, int* value) {
errno = ENOSYS;
return false;
}
bool SocketBase::SetMulticastHops(intptr_t fd, intptr_t protocol, int value) {
errno = ENOSYS;
return false;
}
bool SocketBase::GetBroadcast(intptr_t fd, bool* enabled) {
errno = ENOSYS;
return false;
}
bool SocketBase::SetBroadcast(intptr_t fd, bool enabled) {
errno = ENOSYS;
return false;
}
bool SocketBase::SetOption(intptr_t fd,
int level,
int option,
const char* data,
int length) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
return NO_RETRY_EXPECTED(
setsockopt(handle->fd(), level, option, data, length)) == 0;
}
bool SocketBase::GetOption(intptr_t fd,
int level,
int option,
char* data,
unsigned int* length) {
IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
socklen_t optlen = static_cast<socklen_t>(*length);
auto result =
NO_RETRY_EXPECTED(getsockopt(handle->fd(), level, option, data, &optlen));
*length = static_cast<unsigned int>(optlen);
return result == 0;
}
bool SocketBase::JoinMulticast(intptr_t fd,
const RawAddr& addr,
const RawAddr&,
int interfaceIndex) {
errno = ENOSYS;
return false;
}
bool SocketBase::LeaveMulticast(intptr_t fd,
const RawAddr& addr,
const RawAddr&,
int interfaceIndex) {
errno = ENOSYS;
return false;
}
} // namespace bin
} // namespace dart
#endif // defined(DART_HOST_OS_FUCHSIA)