15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/sync_socket.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <errno.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <fcntl.h> 98bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)#include <limits.h> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdio.h> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/ioctl.h> 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/socket.h> 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/types.h> 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_SOLARIS) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/filio.h> 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/file_util.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 218bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)#include "base/threading/thread_restrictions.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// To avoid users sending negative message lengths to Send/Receive 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// we clamp message lengths, which are size_t, to no more than INT_MAX. 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const size_t kMaxMessageLength = static_cast<size_t>(INT_MAX); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 308bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// Writes |length| of |buffer| into |handle|. Returns the number of bytes 318bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// written or zero on error. |length| must be greater than 0. 328bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)size_t SendHelper(SyncSocket::Handle handle, 338bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const void* buffer, 348bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) size_t length) { 358bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_GT(length, 0u); 368bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_LE(length, kMaxMessageLength); 378bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(handle, SyncSocket::kInvalidHandle); 388bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const char* charbuffer = static_cast<const char*>(buffer); 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const int len = WriteFileDescriptor(handle, charbuffer, length); 408bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return len < 0 ? 0 : static_cast<size_t>(len); 418bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)} 428bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 430f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)bool CloseHandle(SyncSocket::Handle handle) { 440f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) if (handle != SyncSocket::kInvalidHandle && close(handle) < 0) { 450f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) DPLOG(ERROR) << "close"; 460f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return false; 470f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) } 480f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) 490f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return true; 500f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)} 510f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const SyncSocket::Handle SyncSocket::kInvalidHandle = -1; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SyncSocket::SyncSocket() : handle_(kInvalidHandle) {} 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SyncSocket::~SyncSocket() { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Close(); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool SyncSocket::CreatePair(SyncSocket* socket_a, SyncSocket* socket_b) { 648bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(socket_a, socket_b); 658bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_EQ(socket_a->handle_, kInvalidHandle); 668bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_EQ(socket_b->handle_, kInvalidHandle); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_MACOSX) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int nosigpipe = 1; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // defined(OS_MACOSX) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Handle handles[2] = { kInvalidHandle, kInvalidHandle }; 730f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) if (socketpair(AF_UNIX, SOCK_STREAM, 0, handles) != 0) { 740f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) CloseHandle(handles[0]); 750f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) CloseHandle(handles[1]); 760f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return false; 770f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) } 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_MACOSX) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // On OSX an attempt to read or write to a closed socket may generate a 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // SIGPIPE rather than returning -1. setsockopt will shut this off. 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (0 != setsockopt(handles[0], SOL_SOCKET, SO_NOSIGPIPE, 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &nosigpipe, sizeof nosigpipe) || 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0 != setsockopt(handles[1], SOL_SOCKET, SO_NOSIGPIPE, 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &nosigpipe, sizeof nosigpipe)) { 860f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) CloseHandle(handles[0]); 870f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) CloseHandle(handles[1]); 880f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return false; 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Copy the handles out for successful return. 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) socket_a->handle_ = handles[0]; 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) socket_b->handle_ = handles[1]; 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool SyncSocket::Close() { 1000f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const bool retval = CloseHandle(handle_); 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) handle_ = kInvalidHandle; 1020f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return retval; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t SyncSocket::Send(const void* buffer, size_t length) { 1068bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) ThreadRestrictions::AssertIOAllowed(); 1078bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return SendHelper(handle_, buffer, length); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t SyncSocket::Receive(void* buffer, size_t length) { 1118bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) ThreadRestrictions::AssertIOAllowed(); 1128bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_GT(length, 0u); 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_LE(length, kMaxMessageLength); 1148bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(handle_, kInvalidHandle); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* charbuffer = static_cast<char*>(buffer); 116f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) if (ReadFromFD(handle_, charbuffer, length)) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return length; 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1218bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)size_t SyncSocket::ReceiveWithTimeout(void* buffer, 1228bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) size_t length, 1238bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) TimeDelta timeout) { 1248bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) ThreadRestrictions::AssertIOAllowed(); 1258bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_GT(length, 0u); 1268bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_LE(length, kMaxMessageLength); 1278bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(handle_, kInvalidHandle); 1280f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) 1290f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // TODO(dalecurtis): There's an undiagnosed issue on OSX where we're seeing 1300f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // large numbers of open files which prevents select() from being used. In 1310f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // this case, the best we can do is Peek() to see if we can Receive() now or 1320f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // return a timeout error (0) if not. See http://crbug.com/314364. 1330f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) if (handle_ >= FD_SETSIZE) 1340f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return Peek() < length ? 0 : Receive(buffer, length); 1358bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1368bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // Only timeouts greater than zero and less than one second are allowed. 1378bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_GT(timeout.InMicroseconds(), 0); 1388bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_LT(timeout.InMicroseconds(), 1398bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) base::TimeDelta::FromSeconds(1).InMicroseconds()); 1408bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1418bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // Track the start time so we can reduce the timeout as data is read. 1428bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) TimeTicks start_time = TimeTicks::Now(); 1438bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const TimeTicks finish_time = start_time + timeout; 1448bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1458bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) fd_set read_fds; 1468bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) size_t bytes_read_total; 1478bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) for (bytes_read_total = 0; 1488bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bytes_read_total < length && timeout.InMicroseconds() > 0; 1498bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) timeout = finish_time - base::TimeTicks::Now()) { 1508bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) FD_ZERO(&read_fds); 1518bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) FD_SET(handle_, &read_fds); 1528bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1538bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // Wait for data to become available. 1548bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) struct timeval timeout_struct = 1558bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) { 0, static_cast<suseconds_t>(timeout.InMicroseconds()) }; 1568bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const int select_result = 1578bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) select(handle_ + 1, &read_fds, NULL, NULL, &timeout_struct); 1588bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // Handle EINTR manually since we need to update the timeout value. 1598bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) if (select_result == -1 && errno == EINTR) 1608bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) continue; 1618bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) if (select_result <= 0) 1628bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return bytes_read_total; 1638bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1648bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // select() only tells us that data is ready for reading, not how much. We 1658bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // must Peek() for the amount ready for reading to avoid blocking. 1668bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK(FD_ISSET(handle_, &read_fds)); 1678bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const size_t bytes_to_read = std::min(Peek(), length - bytes_read_total); 1688bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1698bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // There may be zero bytes to read if the socket at the other end closed. 1708bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) if (!bytes_to_read) 1718bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return bytes_read_total; 1728bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1738bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const size_t bytes_received = 1748bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) Receive(static_cast<char*>(buffer) + bytes_read_total, bytes_to_read); 1758bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bytes_read_total += bytes_received; 1768bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) if (bytes_received != bytes_to_read) 1778bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return bytes_read_total; 1788bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 1798bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1808bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return bytes_read_total; 1818bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)} 1828bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t SyncSocket::Peek() { 1848bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(handle_, kInvalidHandle); 1858bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) int number_chars = 0; 1868bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) if (ioctl(handle_, FIONREAD, &number_chars) == -1) { 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If there is an error in ioctl, signal that the channel would block. 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1908bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_GE(number_chars, 0); 1918bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return number_chars; 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CancelableSyncSocket::CancelableSyncSocket() {} 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CancelableSyncSocket::CancelableSyncSocket(Handle handle) 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : SyncSocket(handle) { 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CancelableSyncSocket::Shutdown() { 2008bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(handle_, kInvalidHandle); 2018bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return HANDLE_EINTR(shutdown(handle_, SHUT_RDWR)) >= 0; 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t CancelableSyncSocket::Send(const void* buffer, size_t length) { 2058bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_GT(length, 0u); 2068bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_LE(length, kMaxMessageLength); 2078bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) DCHECK_NE(handle_, kInvalidHandle); 2088bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 2098bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const long flags = fcntl(handle_, F_GETFL, NULL); 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (flags != -1 && (flags & O_NONBLOCK) == 0) { 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Set the socket to non-blocking mode for sending if its original mode 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // is blocking. 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) fcntl(handle_, F_SETFL, flags | O_NONBLOCK); 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2168bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const size_t len = SendHelper(handle_, buffer, length); 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (flags != -1 && (flags & O_NONBLOCK) == 0) { 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Restore the original flags. 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) fcntl(handle_, F_SETFL, flags); 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return len; 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CancelableSyncSocket::CreatePair(CancelableSyncSocket* socket_a, 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CancelableSyncSocket* socket_b) { 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SyncSocket::CreatePair(socket_a, socket_b); 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 233