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> |
Cody Schuffelen | 2a4746f | 2019-08-28 12:46:45 -0700 | [diff] [blame^] | 20 | #include <sys/mman.h> |
| 21 | #include <sys/syscall.h> |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 22 | #include <cstddef> |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 23 | #include <errno.h> |
| 24 | #include <fcntl.h> |
| 25 | #include <netinet/in.h> |
| 26 | #include <unistd.h> |
Jorge E. Moreira | cfbb410 | 2018-07-02 18:53:24 -0700 | [diff] [blame] | 27 | #include <algorithm> |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 28 | #include <vector> |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 29 | |
Greg Hartman | 40b88f5 | 2017-06-22 15:34:11 -0700 | [diff] [blame] | 30 | #include "common/libs/glog/logging.h" |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 31 | #include "common/libs/fs/shared_select.h" |
| 32 | |
| 33 | // #define ENABLE_GCE_SHARED_FD_LOGGING 1 |
| 34 | |
| 35 | namespace { |
Greg Hartman | 153b106 | 2017-11-11 12:09:21 -0800 | [diff] [blame] | 36 | using cvd::SharedFDSet; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 37 | |
| 38 | void MarkAll(const SharedFDSet& input, fd_set* dest, int* max_index) { |
| 39 | for (SharedFDSet::const_iterator it = input.begin(); it != input.end(); |
| 40 | ++it) { |
| 41 | (*it)->Set(dest, max_index); |
| 42 | } |
| 43 | } |
| 44 | |
Tomasz Wiszkowski | 09c1778 | 2017-09-15 09:54:49 -0700 | [diff] [blame] | 45 | void CheckMarked(fd_set* in_out_mask, SharedFDSet* in_out_set) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 46 | if (!in_out_set) { |
| 47 | return; |
| 48 | } |
| 49 | SharedFDSet save; |
| 50 | save.swap(in_out_set); |
| 51 | for (SharedFDSet::iterator it = save.begin(); it != save.end(); ++it) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 52 | if ((*it)->IsSet(in_out_mask)) { |
| 53 | in_out_set->Set(*it); |
| 54 | } |
| 55 | } |
| 56 | } |
Cody Schuffelen | 2a4746f | 2019-08-28 12:46:45 -0700 | [diff] [blame^] | 57 | |
| 58 | /* |
| 59 | * Android currently has host prebuilts of glibc 2.15 and 2.17, but |
| 60 | * memfd_create was only added in glibc 2.27. It was defined in Linux 3.17, |
| 61 | * so we consider it safe to use the low-level arbitrary syscall wrapper. |
| 62 | */ |
| 63 | #ifndef __NR_memfd_create |
| 64 | # if defined(__x86_64__) |
| 65 | # define __NR_memfd_create 319 |
| 66 | # elif defined(__i386__) |
| 67 | # define __NR_memfd_create 356 |
| 68 | # elif defined(__aarch64__) |
| 69 | # define __NR_memfd_create 279 |
| 70 | # else |
| 71 | /* No interest in other architectures. */ |
| 72 | # error "Unknown architecture." |
| 73 | # endif |
| 74 | #endif |
| 75 | |
| 76 | int memfd_create_wrapper(const char* name, unsigned int flags) { |
| 77 | #ifdef CUTTLEFISH_HOST |
| 78 | // TODO(schuffelen): Use memfd_create with a newer host libc. |
| 79 | return syscall(__NR_memfd_create, name, flags); |
| 80 | #else |
| 81 | return memfd_create(name, flags); |
| 82 | #endif |
| 83 | } |
| 84 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 85 | } // namespace |
| 86 | |
Greg Hartman | 153b106 | 2017-11-11 12:09:21 -0800 | [diff] [blame] | 87 | namespace cvd { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 88 | |
| 89 | bool FileInstance::CopyFrom(FileInstance& in) { |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 90 | std::vector<char> buffer(8192); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 91 | while (true) { |
| 92 | ssize_t num_read = in.Read(buffer.data(), buffer.size()); |
| 93 | if (!num_read) { |
| 94 | return true; |
| 95 | } |
| 96 | if (num_read == -1) { |
| 97 | return false; |
| 98 | } |
| 99 | if (num_read > 0) { |
| 100 | if (Write(buffer.data(), num_read) != num_read) { |
| 101 | // The caller will have to log an appropriate message. |
| 102 | return false; |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | return true; |
| 107 | } |
| 108 | |
Jorge E. Moreira | cfbb410 | 2018-07-02 18:53:24 -0700 | [diff] [blame] | 109 | bool FileInstance::CopyFrom(FileInstance& in, size_t length) { |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 110 | std::vector<char> buffer(8192); |
Jorge E. Moreira | cfbb410 | 2018-07-02 18:53:24 -0700 | [diff] [blame] | 111 | while (length > 0) { |
| 112 | ssize_t num_read = in.Read(buffer.data(), std::min(buffer.size(), length)); |
| 113 | length -= num_read; |
| 114 | if (num_read <= 0) { |
| 115 | return false; |
| 116 | } |
| 117 | if (Write(buffer.data(), num_read) != num_read) { |
| 118 | // The caller will have to log an appropriate message. |
| 119 | return false; |
| 120 | } |
| 121 | } |
| 122 | return true; |
| 123 | } |
| 124 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 125 | void FileInstance::Close() { |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 126 | std::stringstream message; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 127 | if (fd_ == -1) { |
| 128 | errno_ = EBADF; |
| 129 | } else if (close(fd_) == -1) { |
| 130 | errno_ = errno; |
| 131 | if (identity_.size()) { |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 132 | message << __FUNCTION__ << ": " << identity_ << " failed (" << StrError() << ")"; |
| 133 | std::string message_str = message.str(); |
| 134 | Log(message_str.c_str()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 135 | } |
| 136 | } else { |
| 137 | if (identity_.size()) { |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 138 | message << __FUNCTION__ << ": " << identity_ << "succeeded"; |
| 139 | std::string message_str = message.str(); |
| 140 | Log(message_str.c_str()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 141 | } |
| 142 | } |
| 143 | fd_ = -1; |
| 144 | } |
| 145 | |
| 146 | void FileInstance::Identify(const char* identity) { |
Cody Schuffelen | 4ede79d | 2019-11-13 13:24:12 -0800 | [diff] [blame] | 147 | std::stringstream identity_stream; |
| 148 | identity_stream << "fd=" << fd_ << " @" << this << " is " << identity; |
| 149 | identity_ = identity_stream.str(); |
| 150 | std::stringstream message; |
| 151 | message << __FUNCTION__ << ": " << identity_; |
| 152 | std::string message_str = message.str(); |
| 153 | Log(message_str.c_str()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | bool FileInstance::IsSet(fd_set* in) const { |
| 157 | if (IsOpen() && FD_ISSET(fd_, in)) { |
| 158 | return true; |
| 159 | } |
| 160 | return false; |
| 161 | } |
| 162 | |
| 163 | #if ENABLE_GCE_SHARED_FD_LOGGING |
| 164 | void FileInstance::Log(const char* message) { |
Greg Hartman | 67fa858 | 2017-07-31 21:40:02 -0700 | [diff] [blame] | 165 | LOG(INFO) << message; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 166 | } |
| 167 | #else |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 168 | void FileInstance::Log(const char*) {} |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 169 | #endif |
| 170 | |
| 171 | void FileInstance::Set(fd_set* dest, int* max_index) const { |
| 172 | if (!IsOpen()) { |
| 173 | return; |
| 174 | } |
| 175 | if (fd_ >= *max_index) { |
| 176 | *max_index = fd_ + 1; |
| 177 | } |
| 178 | FD_SET(fd_, dest); |
| 179 | } |
| 180 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 181 | int Select(SharedFDSet* read_set, SharedFDSet* write_set, |
| 182 | SharedFDSet* error_set, struct timeval* timeout) { |
| 183 | int max_index = 0; |
| 184 | fd_set readfds; |
| 185 | FD_ZERO(&readfds); |
| 186 | if (read_set) { |
| 187 | MarkAll(*read_set, &readfds, &max_index); |
| 188 | } |
| 189 | fd_set writefds; |
| 190 | FD_ZERO(&writefds); |
| 191 | if (write_set) { |
| 192 | MarkAll(*write_set, &writefds, &max_index); |
| 193 | } |
| 194 | fd_set errorfds; |
| 195 | FD_ZERO(&errorfds); |
Tomasz Wiszkowski | 09c1778 | 2017-09-15 09:54:49 -0700 | [diff] [blame] | 196 | if (error_set) { |
| 197 | MarkAll(*error_set, &errorfds, &max_index); |
| 198 | } |
| 199 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 200 | int rval = TEMP_FAILURE_RETRY( |
| 201 | select(max_index, &readfds, &writefds, &errorfds, timeout)); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 202 | FileInstance::Log("select\n"); |
Tomasz Wiszkowski | 09c1778 | 2017-09-15 09:54:49 -0700 | [diff] [blame] | 203 | CheckMarked(&readfds, read_set); |
| 204 | CheckMarked(&writefds, write_set); |
| 205 | CheckMarked(&errorfds, error_set); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 206 | return rval; |
| 207 | } |
| 208 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 209 | static void MakeAddress(const char* name, bool abstract, |
| 210 | struct sockaddr_un* dest, socklen_t* len) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 211 | memset(dest, 0, sizeof(*dest)); |
| 212 | dest->sun_family = AF_UNIX; |
| 213 | // sun_path is NOT expected to be nul-terminated. |
| 214 | // See man 7 unix. |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 215 | size_t namelen; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 216 | if (abstract) { |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 217 | // ANDROID_SOCKET_NAMESPACE_ABSTRACT |
| 218 | namelen = strlen(name); |
| 219 | CHECK_LE(namelen, sizeof(dest->sun_path) - 1) |
| 220 | << "MakeAddress failed. Name=" << name << " is longer than allowed."; |
| 221 | dest->sun_path[0] = 0; |
| 222 | memcpy(dest->sun_path + 1, name, namelen); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 223 | } else { |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 224 | // ANDROID_SOCKET_NAMESPACE_RESERVED |
| 225 | // ANDROID_SOCKET_NAMESPACE_FILESYSTEM |
| 226 | // TODO(pinghao): Distinguish between them? |
| 227 | namelen = strlen(name); |
| 228 | CHECK_LE(namelen, sizeof(dest->sun_path)) |
| 229 | << "MakeAddress failed. Name=" << name << " is longer than allowed."; |
| 230 | strncpy(dest->sun_path, name, strlen(name)); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 231 | } |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 232 | *len = namelen + offsetof(struct sockaddr_un, sun_path) + 1; |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | SharedFD SharedFD::SocketSeqPacketServer(const char* name, mode_t mode) { |
| 236 | return SocketLocalServer(name, false, SOCK_SEQPACKET, mode); |
| 237 | } |
| 238 | |
| 239 | SharedFD SharedFD::SocketSeqPacketClient(const char* name) { |
| 240 | return SocketLocalClient(name, false, SOCK_SEQPACKET); |
| 241 | } |
| 242 | |
Tomasz Wiszkowski | af38c7c | 2017-08-14 12:33:11 -0700 | [diff] [blame] | 243 | SharedFD SharedFD::TimerFD(int clock, int flags) { |
| 244 | int fd = timerfd_create(clock, flags); |
| 245 | if (fd == -1) { |
| 246 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 247 | } else { |
| 248 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, 0))); |
| 249 | } |
| 250 | } |
| 251 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 252 | SharedFD SharedFD::Accept(const FileInstance& listener, struct sockaddr* addr, |
| 253 | socklen_t* addrlen) { |
| 254 | return SharedFD( |
| 255 | std::shared_ptr<FileInstance>(listener.Accept(addr, addrlen))); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | SharedFD SharedFD::Accept(const FileInstance& listener) { |
| 259 | return SharedFD::Accept(listener, NULL, NULL); |
| 260 | } |
| 261 | |
Greg Hartman | 3c95aac | 2017-06-14 18:24:26 -0700 | [diff] [blame] | 262 | SharedFD SharedFD::Dup(int unmanaged_fd) { |
Cody Schuffelen | 213600a | 2019-11-18 18:52:59 -0800 | [diff] [blame] | 263 | int fd = fcntl(unmanaged_fd, F_DUPFD_CLOEXEC, 3); |
| 264 | int error_num = errno; |
| 265 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, error_num))); |
Greg Hartman | 3c95aac | 2017-06-14 18:24:26 -0700 | [diff] [blame] | 266 | } |
| 267 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 268 | bool SharedFD::Pipe(SharedFD* fd0, SharedFD* fd1) { |
| 269 | int fds[2]; |
| 270 | int rval = pipe(fds); |
| 271 | if (rval != -1) { |
| 272 | (*fd0) = std::shared_ptr<FileInstance>(new FileInstance(fds[0], errno)); |
| 273 | (*fd1) = std::shared_ptr<FileInstance>(new FileInstance(fds[1], errno)); |
| 274 | return true; |
| 275 | } |
| 276 | return false; |
| 277 | } |
| 278 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 279 | SharedFD SharedFD::Event(int initval, int flags) { |
Cody Schuffelen | b11b460 | 2019-08-28 16:04:33 -0700 | [diff] [blame] | 280 | int fd = eventfd(initval, flags); |
| 281 | return std::shared_ptr<FileInstance>(new FileInstance(fd, errno)); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Tomasz Wiszkowski | 16fb174 | 2017-09-15 14:31:53 -0700 | [diff] [blame] | 284 | SharedFD SharedFD::Epoll(int flags) { |
Cody Schuffelen | b11b460 | 2019-08-28 16:04:33 -0700 | [diff] [blame] | 285 | int fd = epoll_create1(flags); |
| 286 | return std::shared_ptr<FileInstance>(new FileInstance(fd, errno)); |
Tomasz Wiszkowski | 16fb174 | 2017-09-15 14:31:53 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Cody Schuffelen | 2a4746f | 2019-08-28 12:46:45 -0700 | [diff] [blame^] | 289 | SharedFD SharedFD::MemfdCreate(const char* name, unsigned int flags) { |
| 290 | int fd = memfd_create_wrapper(name, flags); |
| 291 | int error_num = errno; |
| 292 | return std::shared_ptr<FileInstance>(new FileInstance(fd, error_num)); |
| 293 | } |
| 294 | |
Jorge E. Moreira | 8e9793e | 2018-11-05 21:57:26 -0800 | [diff] [blame] | 295 | bool SharedFD::SocketPair(int domain, int type, int protocol, |
| 296 | SharedFD* fd0, SharedFD* fd1) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 297 | int fds[2]; |
| 298 | int rval = socketpair(domain, type, protocol, fds); |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 299 | if (rval != -1) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 300 | (*fd0) = std::shared_ptr<FileInstance>(new FileInstance(fds[0], errno)); |
| 301 | (*fd1) = std::shared_ptr<FileInstance>(new FileInstance(fds[1], errno)); |
| 302 | return true; |
| 303 | } |
| 304 | return false; |
| 305 | } |
| 306 | |
| 307 | SharedFD SharedFD::Open(const char* path, int flags, mode_t mode) { |
| 308 | int fd = TEMP_FAILURE_RETRY(open(path, flags, mode)); |
| 309 | if (fd == -1) { |
| 310 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 311 | } else { |
| 312 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, 0))); |
| 313 | } |
| 314 | } |
| 315 | |
Jorge E. Moreira | 6d7753e | 2018-07-18 11:28:48 -0700 | [diff] [blame] | 316 | SharedFD SharedFD::Creat(const char* path, mode_t mode) { |
| 317 | return SharedFD::Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode); |
| 318 | } |
| 319 | |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 320 | SharedFD SharedFD::Socket(int domain, int socket_type, int protocol) { |
| 321 | int fd = TEMP_FAILURE_RETRY(socket(domain, socket_type, protocol)); |
| 322 | if (fd == -1) { |
| 323 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, errno))); |
| 324 | } else { |
| 325 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(fd, 0))); |
| 326 | } |
| 327 | } |
| 328 | |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 329 | SharedFD SharedFD::ErrorFD(int error) { |
| 330 | return SharedFD(std::shared_ptr<FileInstance>(new FileInstance(-1, error))); |
| 331 | } |
| 332 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 333 | SharedFD SharedFD::SocketLocalClient(const char* name, bool abstract, |
| 334 | int in_type) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 335 | struct sockaddr_un addr; |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 336 | socklen_t addrlen; |
| 337 | MakeAddress(name, abstract, &addr, &addrlen); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 338 | SharedFD rval = SharedFD::Socket(PF_UNIX, in_type, 0); |
| 339 | if (!rval->IsOpen()) { |
| 340 | return rval; |
| 341 | } |
Ryan Haining | e451e9d | 2018-05-09 17:02:32 -0700 | [diff] [blame] | 342 | if (rval->Connect(reinterpret_cast<sockaddr*>(&addr), addrlen) == -1) { |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 343 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 344 | } |
| 345 | return rval; |
| 346 | } |
| 347 | |
Ryan Haining | d5c1bde | 2018-01-29 13:34:22 -0800 | [diff] [blame] | 348 | SharedFD SharedFD::SocketLocalClient(int port, int type) { |
| 349 | sockaddr_in addr{}; |
| 350 | addr.sin_family = AF_INET; |
| 351 | addr.sin_port = htons(port); |
| 352 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 353 | SharedFD rval = SharedFD::Socket(AF_INET, type, 0); |
| 354 | if (!rval->IsOpen()) { |
| 355 | return rval; |
| 356 | } |
| 357 | if (rval->Connect(reinterpret_cast<const sockaddr*>(&addr), |
| 358 | sizeof addr) < 0) { |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 359 | return SharedFD::ErrorFD(rval->GetErrno()); |
Ryan Haining | d5c1bde | 2018-01-29 13:34:22 -0800 | [diff] [blame] | 360 | } |
| 361 | return rval; |
| 362 | } |
| 363 | |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 364 | SharedFD SharedFD::SocketLocalServer(int port, int type) { |
| 365 | struct sockaddr_in addr; |
| 366 | memset(&addr, 0, sizeof(addr)); |
| 367 | addr.sin_family = AF_INET; |
| 368 | addr.sin_port = htons(port); |
| 369 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 370 | SharedFD rval = SharedFD::Socket(AF_INET, type, 0); |
| 371 | if(!rval->IsOpen()) { |
| 372 | return rval; |
| 373 | } |
| 374 | int n = 1; |
| 375 | if (rval->SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) { |
| 376 | LOG(ERROR) << "SetSockOpt failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 377 | return SharedFD::ErrorFD(rval->GetErrno()); |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 378 | } |
Ryan Haining | e451e9d | 2018-05-09 17:02:32 -0700 | [diff] [blame] | 379 | if(rval->Bind(reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) < 0) { |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 380 | LOG(ERROR) << "Bind failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 381 | return SharedFD::ErrorFD(rval->GetErrno()); |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 382 | } |
| 383 | if (type == SOCK_STREAM) { |
| 384 | if (rval->Listen(4) < 0) { |
| 385 | LOG(ERROR) << "Listen failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 386 | return SharedFD::ErrorFD(rval->GetErrno()); |
Jorge E. Moreira | 854bcbc | 2017-09-26 16:05:10 -0700 | [diff] [blame] | 387 | } |
| 388 | } |
| 389 | return rval; |
| 390 | } |
| 391 | |
Tomasz Wiszkowski | d88403b | 2017-07-06 14:42:14 -0700 | [diff] [blame] | 392 | SharedFD SharedFD::SocketLocalServer(const char* name, bool abstract, |
| 393 | int in_type, mode_t mode) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 394 | // DO NOT UNLINK addr.sun_path. It does NOT have to be null-terminated. |
| 395 | // See man 7 unix for more details. |
| 396 | if (!abstract) (void)unlink(name); |
| 397 | |
| 398 | struct sockaddr_un addr; |
Ping-Hao Wu | 75cc1e0 | 2017-06-06 16:39:14 -0700 | [diff] [blame] | 399 | socklen_t addrlen; |
| 400 | MakeAddress(name, abstract, &addr, &addrlen); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 401 | SharedFD rval = SharedFD::Socket(PF_UNIX, in_type, 0); |
| 402 | if (!rval->IsOpen()) { |
| 403 | return rval; |
| 404 | } |
| 405 | |
| 406 | int n = 1; |
| 407 | if (rval->SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) { |
| 408 | LOG(ERROR) << "SetSockOpt failed " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 409 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 410 | } |
Ryan Haining | e451e9d | 2018-05-09 17:02:32 -0700 | [diff] [blame] | 411 | if (rval->Bind(reinterpret_cast<sockaddr*>(&addr), addrlen) == -1) { |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 412 | LOG(ERROR) << "Bind failed; name=" << name << ": " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 413 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | /* Only the bottom bits are really the socket type; there are flags too. */ |
| 417 | constexpr int SOCK_TYPE_MASK = 0xf; |
| 418 | |
| 419 | // Connection oriented sockets: start listening. |
| 420 | if ((in_type & SOCK_TYPE_MASK) == SOCK_STREAM) { |
| 421 | // Follows the default from socket_local_server |
| 422 | if (rval->Listen(1) == -1) { |
| 423 | LOG(ERROR) << "Listen failed: " << rval->StrError(); |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 424 | return SharedFD::ErrorFD(rval->GetErrno()); |
Tomasz Wiszkowski | a449e9c | 2017-05-25 14:30:56 -0700 | [diff] [blame] | 425 | } |
| 426 | } |
| 427 | |
| 428 | if (!abstract) { |
| 429 | if (TEMP_FAILURE_RETRY(chmod(name, mode)) == -1) { |
| 430 | LOG(ERROR) << "chmod failed: " << strerror(errno); |
| 431 | // However, continue since we do have a listening socket |
| 432 | } |
| 433 | } |
| 434 | return rval; |
| 435 | } |
| 436 | |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 437 | SharedFD SharedFD::VsockServer(unsigned int port, int type) { |
| 438 | auto vsock = cvd::SharedFD::Socket(AF_VSOCK, type, 0); |
| 439 | if (!vsock->IsOpen()) { |
| 440 | return vsock; |
| 441 | } |
| 442 | sockaddr_vm addr{}; |
| 443 | addr.svm_family = AF_VSOCK; |
| 444 | addr.svm_port = port; |
| 445 | addr.svm_cid = VMADDR_CID_ANY; |
| 446 | auto casted_addr = reinterpret_cast<sockaddr*>(&addr); |
| 447 | if (vsock->Bind(casted_addr, sizeof(addr)) == -1) { |
| 448 | LOG(ERROR) << "Bind failed (" << vsock->StrError() << ")"; |
| 449 | return SharedFD::ErrorFD(vsock->GetErrno()); |
| 450 | } |
| 451 | if (type == SOCK_STREAM) { |
| 452 | if (vsock->Listen(4) < 0) { |
| 453 | LOG(ERROR) << "Listen failed (" << vsock->StrError() << ")"; |
| 454 | return SharedFD::ErrorFD(vsock->GetErrno()); |
| 455 | } |
| 456 | } |
| 457 | return vsock; |
| 458 | } |
| 459 | |
Cody Schuffelen | 14ecb07 | 2019-11-26 17:59:33 -0800 | [diff] [blame] | 460 | SharedFD SharedFD::VsockServer(int type) { |
| 461 | return VsockServer(VMADDR_PORT_ANY, type); |
| 462 | } |
| 463 | |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 464 | SharedFD SharedFD::VsockClient(unsigned int cid, unsigned int port, int type) { |
| 465 | auto vsock = cvd::SharedFD::Socket(AF_VSOCK, type, 0); |
| 466 | if (!vsock->IsOpen()) { |
| 467 | return vsock; |
| 468 | } |
| 469 | sockaddr_vm addr{}; |
| 470 | addr.svm_family = AF_VSOCK; |
| 471 | addr.svm_port = port; |
| 472 | addr.svm_cid = cid; |
| 473 | auto casted_addr = reinterpret_cast<sockaddr*>(&addr); |
| 474 | if (vsock->Connect(casted_addr, sizeof(addr)) == -1) { |
Cody Schuffelen | fa69c38 | 2018-12-17 18:57:36 -0800 | [diff] [blame] | 475 | return SharedFD::ErrorFD(vsock->GetErrno()); |
| 476 | } |
| 477 | return vsock; |
| 478 | } |
| 479 | |
Greg Hartman | 153b106 | 2017-11-11 12:09:21 -0800 | [diff] [blame] | 480 | } // namespace cvd |