| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (C) 2015-2017 Michael Jeanson <mjeanson@efficios.com> |
| 5 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef BABELTRACE_COMPAT_SOCKET_HPP |
| 9 | #define BABELTRACE_COMPAT_SOCKET_HPP |
| 10 | |
| 11 | #include <stdbool.h> |
| 12 | |
| 13 | #include "cpp-common/bt2c/logging.hpp" |
| 14 | |
| 15 | #ifdef __MINGW32__ |
| 16 | |
| 17 | # include <winsock2.h> |
| 18 | |
| 19 | # define BT_INVALID_SOCKET INVALID_SOCKET |
| 20 | # define BT_SOCKET_ERROR SOCKET_ERROR |
| 21 | # define BT_SOCKET SOCKET |
| 22 | |
| 23 | static inline int bt_socket_init(const bt2c::Logger& logger) |
| 24 | { |
| 25 | WORD verreq; |
| 26 | WSADATA wsa; |
| 27 | int ret; |
| 28 | |
| 29 | /* Request winsock 2.2 support */ |
| 30 | verreq = MAKEWORD(2, 2); |
| 31 | |
| 32 | ret = WSAStartup(verreq, &wsa); |
| 33 | if (ret != 0) { |
| 34 | BT_CPPLOGE_SPEC(logger, "Winsock init failed with error: {}", ret); |
| 35 | goto end; |
| 36 | } |
| 37 | |
| 38 | if (LOBYTE(wsa.wVersion) != 2 || HIBYTE(wsa.wVersion) != 2) { |
| 39 | BT_CPPLOGE_SPEC(logger, "Could not init winsock 2.2 support"); |
| 40 | WSACleanup(); |
| 41 | ret = -1; |
| 42 | } |
| 43 | |
| 44 | end: |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | static inline int bt_socket_fini(void) |
| 49 | { |
| 50 | return WSACleanup(); |
| 51 | } |
| 52 | |
| 53 | static inline int bt_socket_send(int sockfd, const void *buf, size_t len, int flags) |
| 54 | { |
| 55 | return send(sockfd, (const char *) buf, len, flags); |
| 56 | } |
| 57 | |
| 58 | static inline int bt_socket_recv(int sockfd, void *buf, size_t len, int flags) |
| 59 | { |
| 60 | return recv(sockfd, (char *) buf, len, flags); |
| 61 | } |
| 62 | |
| 63 | static inline int bt_socket_close(int fd) |
| 64 | { |
| 65 | return closesocket(fd); |
| 66 | } |
| 67 | |
| 68 | static inline bool bt_socket_interrupted(void) |
| 69 | { |
| 70 | /* There is no equivalent to EINTR in winsock 2.2 */ |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | static inline const char *bt_socket_errormsg(void) |
| 75 | { |
| 76 | const char *errstr; |
| 77 | int error = WSAGetLastError(); |
| 78 | |
| 79 | switch (error) { |
| 80 | case WSAEINTR: |
| 81 | errstr = "Call interrupted"; |
| 82 | break; |
| 83 | case WSAEBADF: |
| 84 | errstr = "Bad file"; |
| 85 | break; |
| 86 | case WSAEACCES: |
| 87 | errstr = "Bad access"; |
| 88 | break; |
| 89 | case WSAEFAULT: |
| 90 | errstr = "Bad argument"; |
| 91 | break; |
| 92 | case WSAEINVAL: |
| 93 | errstr = "Invalid arguments"; |
| 94 | break; |
| 95 | case WSAEMFILE: |
| 96 | errstr = "Out of file descriptors"; |
| 97 | break; |
| 98 | case WSAEWOULDBLOCK: |
| 99 | errstr = "Call would block"; |
| 100 | break; |
| 101 | case WSAEINPROGRESS: |
| 102 | case WSAEALREADY: |
| 103 | errstr = "Blocking call in progress"; |
| 104 | break; |
| 105 | case WSAENOTSOCK: |
| 106 | errstr = "Descriptor is not a socket"; |
| 107 | break; |
| 108 | case WSAEDESTADDRREQ: |
| 109 | errstr = "Need destination address"; |
| 110 | break; |
| 111 | case WSAEMSGSIZE: |
| 112 | errstr = "Bad message size"; |
| 113 | break; |
| 114 | case WSAEPROTOTYPE: |
| 115 | errstr = "Bad protocol"; |
| 116 | break; |
| 117 | case WSAENOPROTOOPT: |
| 118 | errstr = "Protocol option is unsupported"; |
| 119 | break; |
| 120 | case WSAEPROTONOSUPPORT: |
| 121 | errstr = "Protocol is unsupported"; |
| 122 | break; |
| 123 | case WSAESOCKTNOSUPPORT: |
| 124 | errstr = "Socket is unsupported"; |
| 125 | break; |
| 126 | case WSAEOPNOTSUPP: |
| 127 | errstr = "Operation not supported"; |
| 128 | break; |
| 129 | case WSAEAFNOSUPPORT: |
| 130 | errstr = "Address family not supported"; |
| 131 | break; |
| 132 | case WSAEPFNOSUPPORT: |
| 133 | errstr = "Protocol family not supported"; |
| 134 | break; |
| 135 | case WSAEADDRINUSE: |
| 136 | errstr = "Address already in use"; |
| 137 | break; |
| 138 | case WSAEADDRNOTAVAIL: |
| 139 | errstr = "Address not available"; |
| 140 | break; |
| 141 | case WSAENETDOWN: |
| 142 | errstr = "Network down"; |
| 143 | break; |
| 144 | case WSAENETUNREACH: |
| 145 | errstr = "Network unreachable"; |
| 146 | break; |
| 147 | case WSAENETRESET: |
| 148 | errstr = "Network has been reset"; |
| 149 | break; |
| 150 | case WSAECONNABORTED: |
| 151 | errstr = "Connection was aborted"; |
| 152 | break; |
| 153 | case WSAECONNRESET: |
| 154 | errstr = "Connection was reset"; |
| 155 | break; |
| 156 | case WSAENOBUFS: |
| 157 | errstr = "No buffer space"; |
| 158 | break; |
| 159 | case WSAEISCONN: |
| 160 | errstr = "Socket is already connected"; |
| 161 | break; |
| 162 | case WSAENOTCONN: |
| 163 | errstr = "Socket is not connected"; |
| 164 | break; |
| 165 | case WSAESHUTDOWN: |
| 166 | errstr = "Socket has been shut down"; |
| 167 | break; |
| 168 | case WSAETOOMANYREFS: |
| 169 | errstr = "Too many references"; |
| 170 | break; |
| 171 | case WSAETIMEDOUT: |
| 172 | errstr = "Timed out"; |
| 173 | break; |
| 174 | case WSAECONNREFUSED: |
| 175 | errstr = "Connection refused"; |
| 176 | break; |
| 177 | case WSAELOOP: |
| 178 | errstr = "Loop??"; |
| 179 | break; |
| 180 | case WSAENAMETOOLONG: |
| 181 | errstr = "Name too long"; |
| 182 | break; |
| 183 | case WSAEHOSTDOWN: |
| 184 | errstr = "Host down"; |
| 185 | break; |
| 186 | case WSAEHOSTUNREACH: |
| 187 | errstr = "Host unreachable"; |
| 188 | break; |
| 189 | case WSAENOTEMPTY: |
| 190 | errstr = "Not empty"; |
| 191 | break; |
| 192 | case WSAEPROCLIM: |
| 193 | errstr = "Process limit reached"; |
| 194 | break; |
| 195 | case WSAEUSERS: |
| 196 | errstr = "Too many users"; |
| 197 | break; |
| 198 | case WSAEDQUOT: |
| 199 | errstr = "Bad quota"; |
| 200 | break; |
| 201 | case WSAESTALE: |
| 202 | errstr = "Something is stale"; |
| 203 | break; |
| 204 | case WSAEREMOTE: |
| 205 | errstr = "Remote error"; |
| 206 | break; |
| 207 | case WSAEDISCON: |
| 208 | errstr = "Disconnected"; |
| 209 | break; |
| 210 | |
| 211 | /* Extended Winsock errors */ |
| 212 | case WSASYSNOTREADY: |
| 213 | errstr = "Winsock library is not ready"; |
| 214 | break; |
| 215 | case WSANOTINITIALISED: |
| 216 | errstr = "Winsock library not initialised"; |
| 217 | break; |
| 218 | case WSAVERNOTSUPPORTED: |
| 219 | errstr = "Winsock version not supported"; |
| 220 | break; |
| 221 | |
| 222 | /* getXbyY() errors (already handled in herrmsg): |
| 223 | * Authoritative Answer: Host not found */ |
| 224 | case WSAHOST_NOT_FOUND: |
| 225 | errstr = "Host not found"; |
| 226 | break; |
| 227 | |
| 228 | /* Non-Authoritative: Host not found, or SERVERFAIL */ |
| 229 | case WSATRY_AGAIN: |
| 230 | errstr = "Host not found, try again"; |
| 231 | break; |
| 232 | |
| 233 | /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ |
| 234 | case WSANO_RECOVERY: |
| 235 | errstr = "Unrecoverable error in call to nameserver"; |
| 236 | break; |
| 237 | |
| 238 | /* Valid name, no data record of requested type */ |
| 239 | case WSANO_DATA: |
| 240 | errstr = "No data record of requested type"; |
| 241 | break; |
| 242 | |
| 243 | default: |
| 244 | errstr = "Unknown error"; |
| 245 | } |
| 246 | |
| 247 | return errstr; |
| 248 | } |
| 249 | |
| 250 | #else /* __MINGW32__ */ |
| 251 | |
| 252 | # include <errno.h> |
| 253 | # include <glib.h> |
| 254 | # include <netdb.h> |
| 255 | # include <netinet/in.h> |
| 256 | # include <sys/socket.h> |
| 257 | # include <unistd.h> |
| 258 | |
| 259 | # define BT_INVALID_SOCKET -1 |
| 260 | # define BT_SOCKET_ERROR -1 |
| 261 | # define BT_SOCKET int |
| 262 | |
| 263 | static inline int bt_socket_init(const bt2c::Logger&) |
| 264 | { |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | static inline int bt_socket_fini(void) |
| 269 | { |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static inline int bt_socket_send(int sockfd, const void *buf, size_t len, int flags) |
| 274 | { |
| 275 | return send(sockfd, buf, len, flags); |
| 276 | } |
| 277 | |
| 278 | static inline int bt_socket_recv(int sockfd, void *buf, size_t len, int flags) |
| 279 | { |
| 280 | return recv(sockfd, buf, len, flags); |
| 281 | } |
| 282 | |
| 283 | static inline int bt_socket_close(int fd) |
| 284 | { |
| 285 | return close(fd); |
| 286 | } |
| 287 | |
| 288 | static inline bool bt_socket_interrupted(void) |
| 289 | { |
| 290 | return (errno == EINTR); |
| 291 | } |
| 292 | |
| 293 | static inline const char *bt_socket_errormsg(void) |
| 294 | { |
| 295 | return g_strerror(errno); |
| 296 | } |
| 297 | #endif |
| 298 | |
| 299 | /* |
| 300 | * This wrapper is used on platforms that have no way of ignoring SIGPIPE |
| 301 | * during a send(). |
| 302 | */ |
| 303 | |
| 304 | #ifndef MSG_NOSIGNAL |
| 305 | # ifdef SO_NOSIGPIPE |
| 306 | # define MSG_NOSIGNAL SO_NOSIGPIPE |
| 307 | # elif defined(__MINGW32__) |
| 308 | # define MSG_NOSIGNAL 0 |
| 309 | # endif |
| 310 | #endif |
| 311 | |
| 312 | #if defined(MSG_NOSIGNAL) |
| 313 | static inline ssize_t bt_socket_send_nosigpipe(int fd, const void *buffer, size_t size) |
| 314 | { |
| 315 | return bt_socket_send(fd, buffer, size, MSG_NOSIGNAL); |
| 316 | } |
| 317 | #else |
| 318 | |
| 319 | # include <signal.h> |
| 320 | |
| 321 | static inline ssize_t bt_socket_send_nosigpipe(int fd, const void *buffer, size_t size) |
| 322 | { |
| 323 | ssize_t sent; |
| 324 | int saved_err; |
| 325 | sigset_t sigpipe_set, pending_set, old_set; |
| 326 | int sigpipe_was_pending; |
| 327 | |
| 328 | /* |
| 329 | * Discard the SIGPIPE from send(), not disturbing any SIGPIPE |
| 330 | * that might be already pending. If a bogus SIGPIPE is sent to |
| 331 | * the entire process concurrently by a malicious user, it may |
| 332 | * be simply discarded. |
| 333 | */ |
| 334 | if (sigemptyset(&pending_set)) { |
| 335 | return -1; |
| 336 | } |
| 337 | /* |
| 338 | * sigpending returns the mask of signals that are _both_ |
| 339 | * blocked for the thread _and_ pending for either the thread or |
| 340 | * the entire process. |
| 341 | */ |
| 342 | if (sigpending(&pending_set)) { |
| 343 | return -1; |
| 344 | } |
| 345 | sigpipe_was_pending = sigismember(&pending_set, SIGPIPE); |
| 346 | /* |
| 347 | * If sigpipe was pending, it means it was already blocked, so |
| 348 | * no need to block it. |
| 349 | */ |
| 350 | if (!sigpipe_was_pending) { |
| 351 | if (sigemptyset(&sigpipe_set)) { |
| 352 | return -1; |
| 353 | } |
| 354 | if (sigaddset(&sigpipe_set, SIGPIPE)) { |
| 355 | return -1; |
| 356 | } |
| 357 | if (pthread_sigmask(SIG_BLOCK, &sigpipe_set, &old_set)) { |
| 358 | return -1; |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | /* Send and save errno. */ |
| 363 | sent = bt_socket_send(fd, buffer, size, 0); |
| 364 | saved_err = errno; |
| 365 | |
| 366 | if (sent == -1 && errno == EPIPE && !sigpipe_was_pending) { |
| 367 | struct timespec timeout = {0, 0}; |
| 368 | int ret; |
| 369 | |
| 370 | do { |
| 371 | ret = sigtimedwait(&sigpipe_set, NULL, &timeout); |
| 372 | } while (ret == -1 && errno == EINTR); |
| 373 | } |
| 374 | if (!sigpipe_was_pending) { |
| 375 | if (pthread_sigmask(SIG_SETMASK, &old_set, NULL)) { |
| 376 | return -1; |
| 377 | } |
| 378 | } |
| 379 | /* Restore send() errno */ |
| 380 | errno = saved_err; |
| 381 | |
| 382 | return sent; |
| 383 | } |
| 384 | #endif |
| 385 | |
| 386 | #endif /* BABELTRACE_COMPAT_SOCKET_HPP */ |