2017-04-05 19:45:31 +00:00
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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(HOST_OS_LINUX)
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#include "bin/socket_base.h"
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#include <errno.h> // NOLINT
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#include <ifaddrs.h> // NOLINT
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#include <net/if.h> // NOLINT
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#include <netinet/tcp.h> // NOLINT
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#include <stdio.h> // NOLINT
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#include <stdlib.h> // NOLINT
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#include <string.h> // NOLINT
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#include <sys/stat.h> // NOLINT
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#include <unistd.h> // NOLINT
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#include "bin/fdutils.h"
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#include "bin/file.h"
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#include "bin/socket_base_linux.h"
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#include "bin/thread.h"
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#include "platform/signal_blocker.h"
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namespace dart {
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namespace bin {
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SocketAddress::SocketAddress(struct sockaddr* sa) {
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ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
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if (!SocketBase::FormatNumericAddress(*reinterpret_cast<RawAddr*>(sa),
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as_string_, INET6_ADDRSTRLEN)) {
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as_string_[0] = 0;
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}
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socklen_t salen = GetAddrLength(*reinterpret_cast<RawAddr*>(sa));
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memmove(reinterpret_cast<void*>(&addr_), sa, salen);
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}
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bool SocketBase::Initialize() {
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// Nothing to do on Linux.
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return true;
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}
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bool SocketBase::FormatNumericAddress(const RawAddr& addr,
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char* address,
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int len) {
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socklen_t salen = SocketAddress::GetAddrLength(addr);
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return (NO_RETRY_EXPECTED(getnameinfo(&addr.addr, salen, address, len, NULL,
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2019-09-05 21:41:42 +00:00
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0, NI_NUMERICHOST) == 0)) != 0;
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2017-04-05 19:45:31 +00:00
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}
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bool SocketBase::IsBindError(intptr_t error_number) {
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return error_number == EADDRINUSE || error_number == EADDRNOTAVAIL ||
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error_number == EINVAL;
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}
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intptr_t SocketBase::Available(intptr_t fd) {
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return FDUtils::AvailableBytes(fd);
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}
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2017-04-22 06:29:50 +00:00
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intptr_t SocketBase::Read(intptr_t fd,
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void* buffer,
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intptr_t num_bytes,
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SocketOpKind sync) {
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2017-04-05 19:45:31 +00:00
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ASSERT(fd >= 0);
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ssize_t read_bytes = TEMP_FAILURE_RETRY(read(fd, buffer, num_bytes));
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ASSERT(EAGAIN == EWOULDBLOCK);
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2017-04-22 06:29:50 +00:00
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if ((sync == kAsync) && (read_bytes == -1) && (errno == EWOULDBLOCK)) {
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2017-04-05 19:45:31 +00:00
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// If the read would block we need to retry and therefore return 0
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// as the number of bytes written.
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read_bytes = 0;
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}
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return read_bytes;
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}
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intptr_t SocketBase::RecvFrom(intptr_t fd,
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void* buffer,
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intptr_t num_bytes,
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2017-04-22 06:29:50 +00:00
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RawAddr* addr,
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SocketOpKind sync) {
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2017-04-05 19:45:31 +00:00
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ASSERT(fd >= 0);
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socklen_t addr_len = sizeof(addr->ss);
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ssize_t read_bytes = TEMP_FAILURE_RETRY(
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recvfrom(fd, buffer, num_bytes, 0, &addr->addr, &addr_len));
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return read_bytes;
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}
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2020-03-19 20:23:08 +00:00
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bool SocketBase::AvailableDatagram(intptr_t fd,
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void* buffer,
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intptr_t num_bytes) {
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ASSERT(fd >= 0);
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ssize_t read_bytes =
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TEMP_FAILURE_RETRY(recvfrom(fd, buffer, num_bytes, MSG_PEEK, NULL, NULL));
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return read_bytes >= 0;
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}
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2017-04-05 19:45:31 +00:00
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intptr_t SocketBase::Write(intptr_t fd,
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const void* buffer,
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2017-04-22 06:29:50 +00:00
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intptr_t num_bytes,
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SocketOpKind sync) {
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2017-04-05 19:45:31 +00:00
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ASSERT(fd >= 0);
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ssize_t written_bytes = TEMP_FAILURE_RETRY(write(fd, buffer, num_bytes));
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ASSERT(EAGAIN == EWOULDBLOCK);
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2017-04-22 06:29:50 +00:00
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if ((sync == kAsync) && (written_bytes == -1) && (errno == EWOULDBLOCK)) {
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2017-04-05 19:45:31 +00:00
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// If the would block we need to retry and therefore return 0 as
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// the number of bytes written.
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written_bytes = 0;
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}
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return written_bytes;
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}
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intptr_t SocketBase::SendTo(intptr_t fd,
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const void* buffer,
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intptr_t num_bytes,
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const RawAddr& addr,
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SocketOpKind sync) {
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2017-04-05 19:45:31 +00:00
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ASSERT(fd >= 0);
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ssize_t written_bytes =
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TEMP_FAILURE_RETRY(sendto(fd, buffer, num_bytes, 0, &addr.addr,
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SocketAddress::GetAddrLength(addr)));
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ASSERT(EAGAIN == EWOULDBLOCK);
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2017-04-22 06:29:50 +00:00
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if ((sync == kAsync) && (written_bytes == -1) && (errno == EWOULDBLOCK)) {
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2017-04-05 19:45:31 +00:00
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// If the would block we need to retry and therefore return 0 as
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// the number of bytes written.
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written_bytes = 0;
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}
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return written_bytes;
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}
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intptr_t SocketBase::GetPort(intptr_t fd) {
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ASSERT(fd >= 0);
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RawAddr raw;
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socklen_t size = sizeof(raw);
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if (NO_RETRY_EXPECTED(getsockname(fd, &raw.addr, &size))) {
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return 0;
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}
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return SocketAddress::GetAddrPort(raw);
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}
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SocketAddress* SocketBase::GetRemotePeer(intptr_t fd, intptr_t* port) {
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ASSERT(fd >= 0);
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RawAddr raw;
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socklen_t size = sizeof(raw);
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if (NO_RETRY_EXPECTED(getpeername(fd, &raw.addr, &size))) {
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return NULL;
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}
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*port = SocketAddress::GetAddrPort(raw);
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return new SocketAddress(&raw.addr);
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}
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void SocketBase::GetError(intptr_t fd, OSError* os_error) {
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int len = sizeof(errno);
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int err = 0;
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VOID_NO_RETRY_EXPECTED(getsockopt(fd, SOL_SOCKET, SO_ERROR, &err,
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reinterpret_cast<socklen_t*>(&len)));
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errno = err;
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os_error->SetCodeAndMessage(OSError::kSystem, errno);
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}
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int SocketBase::GetType(intptr_t fd) {
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struct stat64 buf;
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int result = TEMP_FAILURE_RETRY(fstat64(fd, &buf));
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if (result == -1) {
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return -1;
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}
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if (S_ISCHR(buf.st_mode)) {
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return File::kTerminal;
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}
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if (S_ISFIFO(buf.st_mode)) {
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return File::kPipe;
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}
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if (S_ISREG(buf.st_mode)) {
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return File::kFile;
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}
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return File::kOther;
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}
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intptr_t SocketBase::GetStdioHandle(intptr_t num) {
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return num;
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}
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AddressList<SocketAddress>* SocketBase::LookupAddress(const char* host,
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int type,
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OSError** os_error) {
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// Perform a name lookup for a host name.
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struct addrinfo hints;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = SocketAddress::FromType(type);
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_ADDRCONFIG;
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hints.ai_protocol = IPPROTO_TCP;
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struct addrinfo* info = NULL;
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int status = NO_RETRY_EXPECTED(getaddrinfo(host, 0, &hints, &info));
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if (status != 0) {
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// We failed, try without AI_ADDRCONFIG. This can happen when looking up
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// e.g. '::1', when there are no global IPv6 addresses.
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hints.ai_flags = 0;
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status = NO_RETRY_EXPECTED(getaddrinfo(host, 0, &hints, &info));
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if (status != 0) {
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ASSERT(*os_error == NULL);
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*os_error =
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new OSError(status, gai_strerror(status), OSError::kGetAddressInfo);
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return NULL;
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}
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}
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intptr_t count = 0;
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for (struct addrinfo* c = info; c != NULL; c = c->ai_next) {
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if ((c->ai_family == AF_INET) || (c->ai_family == AF_INET6)) {
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count++;
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}
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}
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intptr_t i = 0;
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AddressList<SocketAddress>* addresses = new AddressList<SocketAddress>(count);
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for (struct addrinfo* c = info; c != NULL; c = c->ai_next) {
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if ((c->ai_family == AF_INET) || (c->ai_family == AF_INET6)) {
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addresses->SetAt(i, new SocketAddress(c->ai_addr));
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i++;
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}
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}
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freeaddrinfo(info);
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return addresses;
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}
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bool SocketBase::ReverseLookup(const RawAddr& addr,
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char* host,
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intptr_t host_len,
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OSError** os_error) {
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ASSERT(host_len >= NI_MAXHOST);
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int status = NO_RETRY_EXPECTED(
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getnameinfo(&addr.addr, SocketAddress::GetAddrLength(addr), host,
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host_len, NULL, 0, NI_NAMEREQD));
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if (status != 0) {
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ASSERT(*os_error == NULL);
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*os_error =
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new OSError(status, gai_strerror(status), OSError::kGetAddressInfo);
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return false;
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}
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return true;
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}
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bool SocketBase::ParseAddress(int type, const char* address, RawAddr* addr) {
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int result;
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if (type == SocketAddress::TYPE_IPV4) {
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result = NO_RETRY_EXPECTED(inet_pton(AF_INET, address, &addr->in.sin_addr));
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} else {
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ASSERT(type == SocketAddress::TYPE_IPV6);
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result =
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NO_RETRY_EXPECTED(inet_pton(AF_INET6, address, &addr->in6.sin6_addr));
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}
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return (result == 1);
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}
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static bool ShouldIncludeIfaAddrs(struct ifaddrs* ifa, int lookup_family) {
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if (ifa->ifa_addr == NULL) {
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// OpenVPN's virtual device tun0.
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return false;
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}
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int family = ifa->ifa_addr->sa_family;
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return ((lookup_family == family) ||
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(((lookup_family == AF_UNSPEC) &&
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((family == AF_INET) || (family == AF_INET6)))));
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}
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bool SocketBase::ListInterfacesSupported() {
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return true;
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}
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AddressList<InterfaceSocketAddress>* SocketBase::ListInterfaces(
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int type,
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OSError** os_error) {
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struct ifaddrs* ifaddr;
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int status = NO_RETRY_EXPECTED(getifaddrs(&ifaddr));
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if (status != 0) {
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ASSERT(*os_error == NULL);
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*os_error =
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new OSError(status, gai_strerror(status), OSError::kGetAddressInfo);
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return NULL;
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}
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int lookup_family = SocketAddress::FromType(type);
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intptr_t count = 0;
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for (struct ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
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if (ShouldIncludeIfaAddrs(ifa, lookup_family)) {
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count++;
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}
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}
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AddressList<InterfaceSocketAddress>* addresses =
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new AddressList<InterfaceSocketAddress>(count);
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int i = 0;
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for (struct ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
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if (ShouldIncludeIfaAddrs(ifa, lookup_family)) {
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char* ifa_name = DartUtils::ScopedCopyCString(ifa->ifa_name);
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addresses->SetAt(
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i, new InterfaceSocketAddress(ifa->ifa_addr, ifa_name,
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if_nametoindex(ifa->ifa_name)));
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i++;
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}
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}
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freeifaddrs(ifaddr);
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return addresses;
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}
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void SocketBase::Close(intptr_t fd) {
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ASSERT(fd >= 0);
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2019-02-15 23:28:17 +00:00
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close(fd);
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2017-04-05 19:45:31 +00:00
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}
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bool SocketBase::GetNoDelay(intptr_t fd, bool* enabled) {
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int on;
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socklen_t len = sizeof(on);
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int err = NO_RETRY_EXPECTED(getsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
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reinterpret_cast<void*>(&on), &len));
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if (err == 0) {
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*enabled = (on == 1);
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}
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return (err == 0);
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}
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bool SocketBase::SetNoDelay(intptr_t fd, bool enabled) {
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int on = enabled ? 1 : 0;
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return NO_RETRY_EXPECTED(setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
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reinterpret_cast<char*>(&on),
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sizeof(on))) == 0;
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}
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bool SocketBase::GetMulticastLoop(intptr_t fd,
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intptr_t protocol,
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bool* enabled) {
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uint8_t on;
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socklen_t len = sizeof(on);
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int level = protocol == SocketAddress::TYPE_IPV4 ? IPPROTO_IP : IPPROTO_IPV6;
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int optname = protocol == SocketAddress::TYPE_IPV4 ? IP_MULTICAST_LOOP
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: IPV6_MULTICAST_LOOP;
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if (NO_RETRY_EXPECTED(getsockopt(fd, level, optname,
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reinterpret_cast<char*>(&on), &len)) == 0) {
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*enabled = (on == 1);
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return true;
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}
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return false;
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}
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bool SocketBase::SetMulticastLoop(intptr_t fd,
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intptr_t protocol,
|
|
|
|
bool enabled) {
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int on = enabled ? 1 : 0;
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int level = protocol == SocketAddress::TYPE_IPV4 ? IPPROTO_IP : IPPROTO_IPV6;
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int optname = protocol == SocketAddress::TYPE_IPV4 ? IP_MULTICAST_LOOP
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: IPV6_MULTICAST_LOOP;
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return NO_RETRY_EXPECTED(setsockopt(
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fd, level, optname, reinterpret_cast<char*>(&on), sizeof(on))) ==
|
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0;
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}
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bool SocketBase::GetMulticastHops(intptr_t fd, intptr_t protocol, int* value) {
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|
|
uint8_t v;
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socklen_t len = sizeof(v);
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|
|
int level = protocol == SocketAddress::TYPE_IPV4 ? IPPROTO_IP : IPPROTO_IPV6;
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|
int optname = protocol == SocketAddress::TYPE_IPV4 ? IP_MULTICAST_TTL
|
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|
: IPV6_MULTICAST_HOPS;
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|
|
if (NO_RETRY_EXPECTED(getsockopt(fd, level, optname,
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|
|
reinterpret_cast<char*>(&v), &len)) == 0) {
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|
*value = v;
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|
|
return true;
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|
|
}
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|
|
return false;
|
|
|
|
}
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|
|
bool SocketBase::SetMulticastHops(intptr_t fd, intptr_t protocol, int value) {
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|
|
int v = value;
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|
|
int level = protocol == SocketAddress::TYPE_IPV4 ? IPPROTO_IP : IPPROTO_IPV6;
|
|
|
|
int optname = protocol == SocketAddress::TYPE_IPV4 ? IP_MULTICAST_TTL
|
|
|
|
: IPV6_MULTICAST_HOPS;
|
|
|
|
return NO_RETRY_EXPECTED(setsockopt(
|
|
|
|
fd, level, optname, reinterpret_cast<char*>(&v), sizeof(v))) == 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool SocketBase::GetBroadcast(intptr_t fd, bool* enabled) {
|
|
|
|
int on;
|
|
|
|
socklen_t len = sizeof(on);
|
|
|
|
int err = NO_RETRY_EXPECTED(getsockopt(fd, SOL_SOCKET, SO_BROADCAST,
|
|
|
|
reinterpret_cast<char*>(&on), &len));
|
|
|
|
if (err == 0) {
|
|
|
|
*enabled = (on == 1);
|
|
|
|
}
|
|
|
|
return (err == 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
bool SocketBase::SetBroadcast(intptr_t fd, bool enabled) {
|
|
|
|
int on = enabled ? 1 : 0;
|
|
|
|
return NO_RETRY_EXPECTED(setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
|
|
|
|
reinterpret_cast<char*>(&on),
|
|
|
|
sizeof(on))) == 0;
|
|
|
|
}
|
|
|
|
|
2019-01-17 23:05:21 +00:00
|
|
|
bool SocketBase::SetOption(intptr_t fd,
|
|
|
|
int level,
|
|
|
|
int option,
|
|
|
|
const char* data,
|
|
|
|
int length) {
|
|
|
|
return NO_RETRY_EXPECTED(setsockopt(fd, level, option, data, length)) == 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool SocketBase::GetOption(intptr_t fd,
|
|
|
|
int level,
|
|
|
|
int option,
|
|
|
|
char* data,
|
|
|
|
unsigned int* length) {
|
2019-01-18 03:43:50 +00:00
|
|
|
socklen_t optlen = static_cast<socklen_t>(*length);
|
|
|
|
auto result = NO_RETRY_EXPECTED(getsockopt(fd, level, option, data, &optlen));
|
|
|
|
*length = static_cast<unsigned int>(optlen);
|
|
|
|
return result == 0;
|
2019-01-17 23:05:21 +00:00
|
|
|
}
|
|
|
|
|
2017-04-05 19:45:31 +00:00
|
|
|
bool SocketBase::JoinMulticast(intptr_t fd,
|
|
|
|
const RawAddr& addr,
|
|
|
|
const RawAddr&,
|
|
|
|
int interfaceIndex) {
|
|
|
|
int proto = addr.addr.sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
|
|
|
|
struct group_req mreq;
|
|
|
|
mreq.gr_interface = interfaceIndex;
|
|
|
|
memmove(&mreq.gr_group, &addr.ss, SocketAddress::GetAddrLength(addr));
|
|
|
|
return NO_RETRY_EXPECTED(
|
|
|
|
setsockopt(fd, proto, MCAST_JOIN_GROUP, &mreq, sizeof(mreq))) == 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool SocketBase::LeaveMulticast(intptr_t fd,
|
|
|
|
const RawAddr& addr,
|
|
|
|
const RawAddr&,
|
|
|
|
int interfaceIndex) {
|
|
|
|
int proto = addr.addr.sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
|
|
|
|
struct group_req mreq;
|
|
|
|
mreq.gr_interface = interfaceIndex;
|
|
|
|
memmove(&mreq.gr_group, &addr.ss, SocketAddress::GetAddrLength(addr));
|
|
|
|
return NO_RETRY_EXPECTED(setsockopt(fd, proto, MCAST_LEAVE_GROUP, &mreq,
|
|
|
|
sizeof(mreq))) == 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
} // namespace bin
|
|
|
|
} // namespace dart
|
|
|
|
|
|
|
|
#endif // defined(HOST_OS_LINUX)
|