sandbox/linux/syscall_broker/broker_channel.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "sandbox/linux/syscall_broker/broker_channel.h"
   6
   7 #include <sys/socket.h>
   8 #include <sys/types.h>
   9
  10 #include "base/logging.h"
  11
  12 namespace sandbox {
  13
  14 namespace syscall_broker {
  15
  16 // static
  17 void BrokerChannel::CreatePair(EndPoint* reader, EndPoint* writer) {
  18   DCHECK(reader);
  19   DCHECK(writer);
  20   int socket_pair[2];
  21   // Use SOCK_SEQPACKET, to preserve message boundaries but we also want to be
  22   // notified (recvmsg should return and not block) when the connection has
  23   // been broken which could mean that the other end has been closed.
  24   PCHECK(0 == socketpair(AF_UNIX, SOCK_SEQPACKET, 0, socket_pair));
  25
  26   reader->reset(socket_pair[0]);
  27   PCHECK(0 == shutdown(reader->get(), SHUT_WR));
  28
  29   writer->reset(socket_pair[1]);
  30   PCHECK(0 == shutdown(writer->get(), SHUT_RD));
  31 }
  32
  33 }  // namespace syscall_broker
  34
  35 }  // namespace sandbox