Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | #include "common/libs/fs/shared_fd.h" |
| 17 | |
| 18 | #include <sys/types.h> |
| 19 | #include <sys/stat.h> |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 20 | #include <cstddef> |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 21 | #include <errno.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <netinet/in.h> |
| 24 | #include <unistd.h> |
Jorge E. Moreira | cfbb410 | 2018-07-02 18:53:24 -0700 | [diff] [blame] | 25 | #include <algorithm> |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 26 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 27 | #include "common/libs/auto_resources/auto_resources.h" |
Greg Hartman | 40b88f5 | 2017-06-22 15:34:11 -0700 | [diff] [blame] | 28 | #include "common/libs/glog/logging.h" |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 29 | #include "common/libs/fs/shared_select.h" |
| 30 | |
| 31 | // #define ENABLE_GCE_SHARED_FD_LOGGING 1 |
| 32 | |
| 33 | namespace { |
Greg Hartman | 153b106 | 2017-11-11 12:09:21 -0800 | [diff] [blame] | 34 | using cvd::SharedFDSet; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 35 | |
| 36 | void MarkAll(const SharedFDSet& input, fd_set* dest, int* max_index) { |
| 37 | for (SharedFDSet::const_iterator it = input.begin(); it != input.end(); |
| 38 | ++it) { |
| 39 | (*it)->Set(dest, max_index); |
| 40 | } |
| 41 | } |
| 42 | |
Tomasz Wiszkowski | 09c1778 | 2017-09-15 09:54:49 -0700 | [diff] [blame] | 43 | void CheckMarked(fd_set* in_out_mask, SharedFDSet* in_out_set) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 44 | if (!in_out_set) { |
| 45 | return; |
| 46 | } |
| 47 | SharedFDSet save; |
| 48 | save.swap(in_out_set); |
| 49 | for (SharedFDSet::iterator it = save.begin(); it != save.end(); ++it) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 50 | if ((*it)->IsSet(in_out_mask)) { |
| 51 | in_out_set->Set(*it); |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | } // namespace |
| 56 | |
Greg Hartman | 153b106 | 2017-11-11 12:09:21 -0800 | [diff] [blame] | 57 | namespace cvd { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 58 | |
| 59 | bool FileInstance::CopyFrom(FileInstance& in) { |
| 60 | AutoFreeBuffer buffer; |
| 61 | buffer.Resize(8192); |
| 62 | while (true) { |
| 63 | ssize_t num_read = in.Read(buffer.data(), buffer.size()); |
| 64 | if (!num_read) { |
| 65 | return true; |
| 66 | } |
| 67 | if (num_read == -1) { |
| 68 | return false; |
| 69 | } |
| 70 | if (num_read > 0) { |
| 71 | if (Write(buffer.data(), num_read) != num_read) { |
| 72 | // The caller will have to log an appropriate message. |
| 73 | return false; |
| 74 | } |
| 75 | } |
| 76 | } |
| 77 | return true; |
| 78 | } |
| 79 | |
Jorge E. Moreira | cfbb410 | 2018-07-02 18:53:24 -0700 | [diff] [blame] | 80 | bool FileInstance::CopyFrom(FileInstance& in, size_t length) { |
| 81 | AutoFreeBuffer buffer; |
| 82 | buffer.Resize(8192); |
| 83 | while (length > 0) { |
| 84 | ssize_t num_read = in.Read(buffer.data(), std::min(buffer.size(), length)); |
| 85 | length -= num_read; |
| 86 | if (num_read <= 0) { |
| 87 | return false; |
| 88 | } |
| 89 | if (Write(buffer.data(), num_read) != num_read) { |
| 90 | // The caller will have to log an appropriate message. |
| 91 | return false; |
| 92 | } |
| 93 | } |
| 94 | return true; |
| 95 | } |
| 96 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 97 | void FileInstance::Close() { |
| 98 | AutoFreeBuffer message; |
| 99 | if (fd_ == -1) { |
| 100 | errno_ = EBADF; |
| 101 | } else if (close(fd_) == -1) { |
| 102 | errno_ = errno; |
| 103 | if (identity_.size()) { |
| 104 | message.PrintF("%s: %s failed (%s)", __FUNCTION__, identity_.data(), |
| 105 | StrError()); |
| 106 | Log(message.data()); |
| 107 | } |
| 108 | } else { |
| 109 | if (identity_.size()) { |
| 110 | message.PrintF("%s: %s succeeded", __FUNCTION__, identity_.data()); |
| 111 | Log(message.data()); |
| 112 | } |
| 113 | } |
| 114 | fd_ = -1; |
| 115 | } |
| 116 | |
| 117 | void FileInstance::Identify(const char* identity) { |
| 118 | identity_.PrintF("fd=%d @%p is %s", fd_, this, identity); |
| 119 | AutoFreeBuffer message; |
| 120 | message.PrintF("%s: %s", __FUNCTION__, identity_.data()); |
| 121 | Log(message.data()); |
| 122 | } |
| 123 | |
| 124 | bool FileInstance::IsSet(fd_set* in) const { |
| 125 | if (IsOpen() && FD_ISSET(fd_, in)) { |
| 126 | return true; |
| 127 | } |
| 128 | return false; |
| 129 | } |
| 130 | |
| 131 | #if ENABLE_GCE_SHARED_FD_LOGGING |
| 132 | void FileInstance::Log(const char* message) { |
Greg Hartman | 67fa858 | 2017-07-31 21:40:02 -0700 | [diff] [blame] | 133 | LOG(INFO) << message; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 134 | } |
| 135 | #else |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 136 | void FileInstance::Log(const char*) {} |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 137 | #endif |
| 138 | |
| 139 | void FileInstance::Set(fd_set* dest, int* max_index) const { |
| 140 | if (!IsOpen()) { |
| 141 | return; |
| 142 | } |
| 143 | if (fd_ >= *max_index) { |
| 144 | *max_index = fd_ + 1; |
| 145 | } |
| 146 | FD_SET(fd_, dest); |
| 147 | } |
| 148 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 149 | int Select(SharedFDSet* read_set, SharedFDSet* write_set, |
| 150 | SharedFDSet* error_set, struct timeval* timeout) { |
| 151 | int max_index = 0; |
| 152 | fd_set readfds; |
| 153 | FD_ZERO(&readfds); |
| 154 | if (read_set) { |
| 155 | MarkAll(*read_set, &readfds, &max_index); |
| 156 | } |
| 157 | fd_set writefds; |
| 158 | FD_ZERO(&writefds); |
| 159 | if (write_set) { |
| 160 | MarkAll(*write_set, &writefds, &max_index); |
| 161 | } |
| 162 | fd_set errorfds; |
| 163 | FD_ZERO(&errorfds); |
Tomasz Wiszkowski | 09c1778 | 2017-09-15 09:54:49 -0700 | [diff] [blame] | 164 | if (error_set) { |
| 165 | MarkAll(*error_set, &errorfds, &max_index); |
| 166 | } |
| 167 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 168 | int rval = TEMP_FAILURE_RETRY( |
| 169 | select(max_index, &readfds, &writefds, &errorfds, timeout)); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 170 | FileInstance::Log("select\n"); |
Tomasz Wiszkowski | 09c1778 | 2017-09-15 09:54:49 -0700 | [diff] [blame] | 171 | CheckMarked(&readfds, read_set); |
| 172 | CheckMarked(&writefds, write_set); |
| 173 | CheckMarked(&errorfds, error_set); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 174 | return rval; |
| 175 | } |
| 176 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 177 | static void MakeAddress(const char* name, bool abstract, |
| 178 | struct sockaddr_un* dest, socklen_t* len) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 179 | memset(dest, 0, sizeof(*dest)); |
| 180 | dest->sun_family = AF_UNIX; |
| 181 | // sun_path is NOT expected to be nul-terminated. |
| 182 | // See man 7 unix. |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 183 | size_t namelen; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 184 | if (abstract) { |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 185 | // ANDROID_SOCKET_NAMESPACE_ABSTRACT |
| 186 | namelen = strlen(name); |
| 187 | CHECK_LE(namelen, sizeof(dest->sun_path) - 1) |
| 188 | << "MakeAddress failed. Name=" << name << " is longer than allowed."; |
| 189 | dest->sun_path[0] = 0; |
| 190 | memcpy(dest->sun_path + 1, name, namelen); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 191 | } else { |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 192 | // ANDROID_SOCKET_NAMESPACE_RESERVED |
| 193 | // ANDROID_SOCKET_NAMESPACE_FILESYSTEM |
| 194 | // TODO(pinghao): Distinguish between them? |
| 195 | namelen = strlen(name); |
| 196 | CHECK_LE(namelen, sizeof(dest->sun_path)) |
| 197 | << "MakeAddress failed. Name=" << name << " is longer than allowed."; |
| 198 | strncpy(dest->sun_path, name, strlen(name)); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 199 | } |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 200 | *len = namelen + offsetof(struct sockaddr_un, sun_path) + 1; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | SharedFD SharedFD::SocketSeqPacketServer(const char* name, mode_t mode) { |
| 204 | return SocketLocalServer(name, false, SOCK_SEQPACKET, mode); |
| 205 | } |
| 206 | |
| 207 | SharedFD SharedFD::SocketSeqPacketClient(const char* name) { |
| 208 | return SocketLocalClient(name, false, SOCK_SEQPACKET); |
| 209 | } |
| 210 | |
Tomasz Wiszkowski | af38c7c | 2017-08-14 12:33:11 -0700 | [diff] [blame] | 211 | SharedFD SharedFD::TimerFD(int clock, int flags) { |
| 212 | int fd = timerfd_create(clock, flags); |
| 213 | if (fd == -1) { |
| 214 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 215 | } else { |
| 216 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, 0))); |
| 217 | } |
| 218 | } |
| 219 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 220 | SharedFD SharedFD::Accept(const FileInstance& listener, struct sockaddr* addr, |
| 221 | socklen_t* addrlen) { |
| 222 | return SharedFD( |
| 223 | std::shared_ptr<FileInstance>(listener.Accept(addr, addrlen))); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | SharedFD SharedFD::Accept(const FileInstance& listener) { |
| 227 | return SharedFD::Accept(listener, NULL, NULL); |
| 228 | } |
| 229 | |
Greg Hartman | 3c95aac | 2017-06-14 18:24:26 -0700 | [diff] [blame] | 230 | SharedFD SharedFD::Dup(int unmanaged_fd) { |
| 231 | int fd = dup(unmanaged_fd); |
| 232 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 233 | } |
| 234 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 235 | bool SharedFD::Pipe(SharedFD* fd0, SharedFD* fd1) { |
| 236 | int fds[2]; |
| 237 | int rval = pipe(fds); |
| 238 | if (rval != -1) { |
| 239 | (*fd0) = std::shared_ptr<FileInstance>(new FileInstance(fds[0], errno)); |
| 240 | (*fd1) = std::shared_ptr<FileInstance>(new FileInstance(fds[1], errno)); |
| 241 | return true; |
| 242 | } |
| 243 | return false; |
| 244 | } |
| 245 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 246 | SharedFD SharedFD::Event(int initval, int flags) { |
| 247 | return std::shared_ptr<FileInstance>( |
| 248 | new FileInstance(eventfd(initval, flags), errno)); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Tomasz Wiszkowski | 16fb174 | 2017-09-15 14:31:53 -0700 | [diff] [blame] | 251 | SharedFD SharedFD::Epoll(int flags) { |
| 252 | return std::shared_ptr<FileInstance>( |
| 253 | new FileInstance(epoll_create1(flags), errno)); |
| 254 | } |
| 255 | |
Jorge E. Moreira | 8e9793e | 2018-11-05 21:57:26 -0800 | [diff] [blame] | 256 | bool SharedFD::SocketPair(int domain, int type, int protocol, |
| 257 | SharedFD* fd0, SharedFD* fd1) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 258 | int fds[2]; |
| 259 | int rval = socketpair(domain, type, protocol, fds); |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 260 | if (rval != -1) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 261 | (*fd0) = std::shared_ptr<FileInstance>(new FileInstance(fds[0], errno)); |
| 262 | (*fd1) = std::shared_ptr<FileInstance>(new FileInstance(fds[1], errno)); |
| 263 | return true; |
| 264 | } |
| 265 | return false; |
| 266 | } |
| 267 | |
| 268 | SharedFD SharedFD::Open(const char* path, int flags, mode_t mode) { |
| 269 | int fd = TEMP_FAILURE_RETRY(open(path, flags, mode)); |
| 270 | if (fd == -1) { |
| 271 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 272 | } else { |
| 273 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, 0))); |
| 274 | } |
| 275 | } |
| 276 | |
Jorge E. Moreira | 6d7753e | 2018-07-18 11:28:48 -0700 | [diff] [blame] | 277 | SharedFD SharedFD::Creat(const char* path, mode_t mode) { |
| 278 | return SharedFD::Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode); |
| 279 | } |
| 280 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 281 | SharedFD SharedFD::Socket(int domain, int socket_type, int protocol) { |
| 282 | int fd = TEMP_FAILURE_RETRY(socket(domain, socket_type, protocol)); |
| 283 | if (fd == -1) { |
| 284 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 285 | } else { |
| 286 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, 0))); |
| 287 | } |
| 288 | } |
| 289 | |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 290 | SharedFD SharedFD::ErrorFD(int error) { |
| 291 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(-1, error))); |
| 292 | } |
| 293 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 294 | SharedFD SharedFD::SocketLocalClient(const char* name, bool abstract, |
| 295 | int in_type) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 296 | struct sockaddr_un addr; |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 297 | socklen_t addrlen; |
| 298 | MakeAddress(name, abstract, &addr, &addrlen); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 299 | SharedFD rval = SharedFD::Socket(PF_UNIX, in_type, 0); |
| 300 | if (!rval->IsOpen()) { |
| 301 | return rval; |
| 302 | } |
Ryan Haining | e451e9d | 2018-05-09 17:02:32 -0700 | [diff] [blame] | 303 | if (rval->Connect(reinterpret_cast<sockaddr*>(&addr), addrlen) == -1) { |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 304 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 305 | } |
| 306 | return rval; |
| 307 | } |
| 308 | |
Ryan Haining | d5c1bde | 2018-01-29 13:34:22 -0800 | [diff] [blame] | 309 | SharedFD SharedFD::SocketLocalClient(int port, int type) { |
| 310 | sockaddr_in addr{}; |
| 311 | addr.sin_family = AF_INET; |
| 312 | addr.sin_port = htons(port); |
| 313 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 314 | SharedFD rval = SharedFD::Socket(AF_INET, type, 0); |
| 315 | if (!rval->IsOpen()) { |
| 316 | return rval; |
| 317 | } |
| 318 | if (rval->Connect(reinterpret_cast<const sockaddr*>(&addr), |
| 319 | sizeof addr) < 0) { |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 320 | return SharedFD::ErrorFD(rval->GetErrno()); |
Ryan Haining | d5c1bde | 2018-01-29 13:34:22 -0800 | [diff] [blame] | 321 | } |
| 322 | return rval; |
| 323 | } |
| 324 | |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 325 | SharedFD SharedFD::SocketLocalServer(int port, int type) { |
| 326 | struct sockaddr_in addr; |
| 327 | memset(&addr, 0, sizeof(addr)); |
| 328 | addr.sin_family = AF_INET; |
| 329 | addr.sin_port = htons(port); |
| 330 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 331 | SharedFD rval = SharedFD::Socket(AF_INET, type, 0); |
| 332 | if(!rval->IsOpen()) { |
| 333 | return rval; |
| 334 | } |
| 335 | int n = 1; |
| 336 | if (rval->SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) { |
| 337 | LOG(ERROR) << "SetSockOpt failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 338 | return SharedFD::ErrorFD(rval->GetErrno()); |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 339 | } |
Ryan Haining | e451e9d | 2018-05-09 17:02:32 -0700 | [diff] [blame] | 340 | if(rval->Bind(reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) < 0) { |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 341 | LOG(ERROR) << "Bind failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 342 | return SharedFD::ErrorFD(rval->GetErrno()); |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 343 | } |
| 344 | if (type == SOCK_STREAM) { |
| 345 | if (rval->Listen(4) < 0) { |
| 346 | LOG(ERROR) << "Listen failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 347 | return SharedFD::ErrorFD(rval->GetErrno()); |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 348 | } |
| 349 | } |
| 350 | return rval; |
| 351 | } |
| 352 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 353 | SharedFD SharedFD::SocketLocalServer(const char* name, bool abstract, |
| 354 | int in_type, mode_t mode) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 355 | // DO NOT UNLINK addr.sun_path. It does NOT have to be null-terminated. |
| 356 | // See man 7 unix for more details. |
| 357 | if (!abstract) (void)unlink(name); |
| 358 | |
| 359 | struct sockaddr_un addr; |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 360 | socklen_t addrlen; |
| 361 | MakeAddress(name, abstract, &addr, &addrlen); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 362 | SharedFD rval = SharedFD::Socket(PF_UNIX, in_type, 0); |
| 363 | if (!rval->IsOpen()) { |
| 364 | return rval; |
| 365 | } |
| 366 | |
| 367 | int n = 1; |
| 368 | if (rval->SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) { |
| 369 | LOG(ERROR) << "SetSockOpt failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 370 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 371 | } |
Ryan Haining | e451e9d | 2018-05-09 17:02:32 -0700 | [diff] [blame] | 372 | if (rval->Bind(reinterpret_cast<sockaddr*>(&addr), addrlen) == -1) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 373 | LOG(ERROR) << "Bind failed; name=" << name << ": " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 374 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | /* Only the bottom bits are really the socket type; there are flags too. */ |
| 378 | constexpr int SOCK_TYPE_MASK = 0xf; |
| 379 | |
| 380 | // Connection oriented sockets: start listening. |
| 381 | if ((in_type & SOCK_TYPE_MASK) == SOCK_STREAM) { |
| 382 | // Follows the default from socket_local_server |
| 383 | if (rval->Listen(1) == -1) { |
| 384 | LOG(ERROR) << "Listen failed: " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 385 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 386 | } |
| 387 | } |
| 388 | |
| 389 | if (!abstract) { |
| 390 | if (TEMP_FAILURE_RETRY(chmod(name, mode)) == -1) { |
| 391 | LOG(ERROR) << "chmod failed: " << strerror(errno); |
| 392 | // However, continue since we do have a listening socket |
| 393 | } |
| 394 | } |
| 395 | return rval; |
| 396 | } |
| 397 | |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 398 | SharedFD SharedFD::VsockServer(unsigned int port, int type) { |
| 399 | auto vsock = cvd::SharedFD::Socket(AF_VSOCK, type, 0); |
| 400 | if (!vsock->IsOpen()) { |
| 401 | return vsock; |
| 402 | } |
| 403 | sockaddr_vm addr{}; |
| 404 | addr.svm_family = AF_VSOCK; |
| 405 | addr.svm_port = port; |
| 406 | addr.svm_cid = VMADDR_CID_ANY; |
| 407 | auto casted_addr = reinterpret_cast<sockaddr*>(&addr); |
| 408 | if (vsock->Bind(casted_addr, sizeof(addr)) == -1) { |
| 409 | LOG(ERROR) << "Bind failed (" << vsock->StrError() << ")"; |
| 410 | return SharedFD::ErrorFD(vsock->GetErrno()); |
| 411 | } |
| 412 | if (type == SOCK_STREAM) { |
| 413 | if (vsock->Listen(4) < 0) { |
| 414 | LOG(ERROR) << "Listen failed (" << vsock->StrError() << ")"; |
| 415 | return SharedFD::ErrorFD(vsock->GetErrno()); |
| 416 | } |
| 417 | } |
| 418 | return vsock; |
| 419 | } |
| 420 | |
| 421 | SharedFD SharedFD::VsockClient(unsigned int cid, unsigned int port, int type) { |
| 422 | auto vsock = cvd::SharedFD::Socket(AF_VSOCK, type, 0); |
| 423 | if (!vsock->IsOpen()) { |
| 424 | return vsock; |
| 425 | } |
| 426 | sockaddr_vm addr{}; |
| 427 | addr.svm_family = AF_VSOCK; |
| 428 | addr.svm_port = port; |
| 429 | addr.svm_cid = cid; |
| 430 | auto casted_addr = reinterpret_cast<sockaddr*>(&addr); |
| 431 | if (vsock->Connect(casted_addr, sizeof(addr)) == -1) { |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 432 | return SharedFD::ErrorFD(vsock->GetErrno()); |
| 433 | } |
| 434 | return vsock; |
| 435 | } |
| 436 | |
Greg Hartman | 153b106 | 2017-11-11 12:09:21 -0800 | [diff] [blame] | 437 | } // namespace cvd |