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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "ipc/ipc_channel_posix.h" | 5 #include "ipc/ipc_channel_posix.h" |
| 6 | 6 |
| 7 #include <errno.h> | 7 #include <errno.h> |
| 8 #include <fcntl.h> | 8 #include <fcntl.h> |
| 9 #include <stddef.h> | 9 #include <stddef.h> |
| 10 #include <sys/types.h> | 10 #include <sys/types.h> |
| 11 #include <sys/socket.h> | 11 #include <sys/socket.h> |
| 12 #include <sys/stat.h> | 12 #include <sys/stat.h> |
| 13 #include <sys/un.h> | 13 #include <sys/un.h> |
| 14 | 14 |
| 15 #include <string> | 15 #include <string> |
| 16 #include <map> | 16 #include <map> |
| 17 | 17 |
| 18 #include "base/command_line.h" | 18 #include "base/command_line.h" |
| 19 #include "base/eintr_wrapper.h" | 19 #include "base/eintr_wrapper.h" |
| 20 #include "base/file_path.h" | 20 #include "base/file_path.h" |
| 21 #include "base/file_util.h" | 21 #include "base/file_util.h" |
| 22 #include "base/global_descriptors_posix.h" | 22 #include "base/global_descriptors_posix.h" |
| 23 #include "base/lock.h" | |
| 24 #include "base/logging.h" | 23 #include "base/logging.h" |
| 25 #include "base/process_util.h" | 24 #include "base/process_util.h" |
| 26 #include "base/scoped_ptr.h" | 25 #include "base/scoped_ptr.h" |
| 27 #include "base/singleton.h" | 26 #include "base/singleton.h" |
| 28 #include "base/string_util.h" | 27 #include "base/string_util.h" |
| 28 #include "base/synchronization/lock.h" |
| 29 #include "ipc/ipc_descriptors.h" | 29 #include "ipc/ipc_descriptors.h" |
| 30 #include "ipc/ipc_switches.h" | 30 #include "ipc/ipc_switches.h" |
| 31 #include "ipc/file_descriptor_set_posix.h" | 31 #include "ipc/file_descriptor_set_posix.h" |
| 32 #include "ipc/ipc_logging.h" | 32 #include "ipc/ipc_logging.h" |
| 33 #include "ipc/ipc_message_utils.h" | 33 #include "ipc/ipc_message_utils.h" |
| 34 | 34 |
| 35 namespace IPC { | 35 namespace IPC { |
| 36 | 36 |
| 37 // IPC channels on Windows use named pipes (CreateNamedPipe()) with | 37 // IPC channels on Windows use named pipes (CreateNamedPipe()) with |
| 38 // channel ids as the pipe names. Channels on POSIX use sockets as | 38 // channel ids as the pipe names. Channels on POSIX use sockets as |
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| 84 return Singleton<PipeMap>::get(); | 84 return Singleton<PipeMap>::get(); |
| 85 } | 85 } |
| 86 | 86 |
| 87 ~PipeMap() { | 87 ~PipeMap() { |
| 88 // Shouldn't have left over pipes. | 88 // Shouldn't have left over pipes. |
| 89 DCHECK(map_.size() == 0); | 89 DCHECK(map_.size() == 0); |
| 90 } | 90 } |
| 91 | 91 |
| 92 // Lookup a given channel id. Return -1 if not found. | 92 // Lookup a given channel id. Return -1 if not found. |
| 93 int Lookup(const std::string& channel_id) { | 93 int Lookup(const std::string& channel_id) { |
| 94 AutoLock locked(lock_); | 94 base::AutoLock locked(lock_); |
| 95 | 95 |
| 96 ChannelToFDMap::const_iterator i = map_.find(channel_id); | 96 ChannelToFDMap::const_iterator i = map_.find(channel_id); |
| 97 if (i == map_.end()) | 97 if (i == map_.end()) |
| 98 return -1; | 98 return -1; |
| 99 return i->second; | 99 return i->second; |
| 100 } | 100 } |
| 101 | 101 |
| 102 // Remove the mapping for the given channel id. No error is signaled if the | 102 // Remove the mapping for the given channel id. No error is signaled if the |
| 103 // channel_id doesn't exist | 103 // channel_id doesn't exist |
| 104 void RemoveAndClose(const std::string& channel_id) { | 104 void RemoveAndClose(const std::string& channel_id) { |
| 105 AutoLock locked(lock_); | 105 base::AutoLock locked(lock_); |
| 106 | 106 |
| 107 ChannelToFDMap::iterator i = map_.find(channel_id); | 107 ChannelToFDMap::iterator i = map_.find(channel_id); |
| 108 if (i != map_.end()) { | 108 if (i != map_.end()) { |
| 109 if (HANDLE_EINTR(close(i->second)) < 0) | 109 if (HANDLE_EINTR(close(i->second)) < 0) |
| 110 PLOG(ERROR) << "close " << channel_id; | 110 PLOG(ERROR) << "close " << channel_id; |
| 111 map_.erase(i); | 111 map_.erase(i); |
| 112 } | 112 } |
| 113 } | 113 } |
| 114 | 114 |
| 115 // Insert a mapping from @channel_id to @fd. It's a fatal error to insert a | 115 // Insert a mapping from @channel_id to @fd. It's a fatal error to insert a |
| 116 // mapping if one already exists for the given channel_id | 116 // mapping if one already exists for the given channel_id |
| 117 void Insert(const std::string& channel_id, int fd) { | 117 void Insert(const std::string& channel_id, int fd) { |
| 118 AutoLock locked(lock_); | 118 base::AutoLock locked(lock_); |
| 119 DCHECK(fd != -1); | 119 DCHECK(fd != -1); |
| 120 | 120 |
| 121 ChannelToFDMap::const_iterator i = map_.find(channel_id); | 121 ChannelToFDMap::const_iterator i = map_.find(channel_id); |
| 122 CHECK(i == map_.end()) << "Creating second IPC server (fd " << fd << ") " | 122 CHECK(i == map_.end()) << "Creating second IPC server (fd " << fd << ") " |
| 123 << "for '" << channel_id << "' while first " | 123 << "for '" << channel_id << "' while first " |
| 124 << "(fd " << i->second << ") still exists"; | 124 << "(fd " << i->second << ") still exists"; |
| 125 map_[channel_id] = fd; | 125 map_[channel_id] = fd; |
| 126 } | 126 } |
| 127 | 127 |
| 128 private: | 128 private: |
| 129 Lock lock_; | 129 base::Lock lock_; |
| 130 typedef std::map<std::string, int> ChannelToFDMap; | 130 typedef std::map<std::string, int> ChannelToFDMap; |
| 131 ChannelToFDMap map_; | 131 ChannelToFDMap map_; |
| 132 | 132 |
| 133 friend struct DefaultSingletonTraits<PipeMap>; | 133 friend struct DefaultSingletonTraits<PipeMap>; |
| 134 }; | 134 }; |
| 135 | 135 |
| 136 //------------------------------------------------------------------------------ | 136 //------------------------------------------------------------------------------ |
| 137 // Verify that kMaxPipeNameLength is a decent size. | 137 // Verify that kMaxPipeNameLength is a decent size. |
| 138 COMPILE_ASSERT(sizeof(((sockaddr_un*)0)->sun_path) >= kMaxPipeNameLength, | 138 COMPILE_ASSERT(sizeof(((sockaddr_un*)0)->sun_path) >= kMaxPipeNameLength, |
| 139 BAD_SUN_PATH_LENGTH); | 139 BAD_SUN_PATH_LENGTH); |
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| 1149 | 1149 |
| 1150 bool Channel::HasAcceptedConnection() const { | 1150 bool Channel::HasAcceptedConnection() const { |
| 1151 return channel_impl_->HasAcceptedConnection(); | 1151 return channel_impl_->HasAcceptedConnection(); |
| 1152 } | 1152 } |
| 1153 | 1153 |
| 1154 void Channel::ResetToAcceptingConnectionState() { | 1154 void Channel::ResetToAcceptingConnectionState() { |
| 1155 channel_impl_->ResetToAcceptingConnectionState(); | 1155 channel_impl_->ResetToAcceptingConnectionState(); |
| 1156 } | 1156 } |
| 1157 | 1157 |
| 1158 } // namespace IPC | 1158 } // namespace IPC |
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