| 1 | /* |
| 2 | Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com> |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU Lesser General Public License as published by |
| 6 | the Free Software Foundation; either version 2.1 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public License |
| 15 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | #ifdef HAVE_CONFIG_H |
| 18 | #include "config.h" |
| 19 | #endif |
| 20 | |
| 21 | #ifdef AROS |
| 22 | #include "aros_compat.h" |
| 23 | #endif |
| 24 | |
| 25 | #ifdef WIN32 |
| 26 | #include "win32_compat.h" |
| 27 | #endif |
| 28 | |
| 29 | #ifdef HAVE_ARPA_INET_H |
| 30 | #include <arpa/inet.h> |
| 31 | #endif |
| 32 | |
| 33 | #ifdef HAVE_POLL_H |
| 34 | #include <poll.h> |
| 35 | #endif |
| 36 | |
| 37 | #ifdef HAVE_UNISTD_H |
| 38 | #include <unistd.h> |
| 39 | #endif |
| 40 | |
| 41 | #ifdef HAVE_SYS_IOCTL_H |
| 42 | #include <sys/ioctl.h> |
| 43 | #endif |
| 44 | |
| 45 | #ifdef HAVE_SYS_SOCKET_H |
| 46 | #include <sys/socket.h> |
| 47 | #endif |
| 48 | |
| 49 | #ifdef HAVE_NETINET_TCP_H |
| 50 | #include <netinet/tcp.h> |
| 51 | #endif |
| 52 | |
| 53 | #ifdef HAVE_NETDB_H |
| 54 | #include <netdb.h> |
| 55 | #endif |
| 56 | |
| 57 | #ifdef HAVE_SYS_FILIO_H |
| 58 | #include <sys/filio.h> |
| 59 | #endif |
| 60 | |
| 61 | #ifdef HAVE_SYS_SOCKIO_H |
| 62 | #include <sys/sockio.h> |
| 63 | #endif |
| 64 | |
| 65 | #include <stdio.h> |
| 66 | #include <stdlib.h> |
| 67 | #include <assert.h> |
| 68 | #include <fcntl.h> |
| 69 | #include <string.h> |
| 70 | #include <errno.h> |
| 71 | #include <sys/types.h> |
| 72 | #include "libnfs-zdr.h" |
| 73 | #include "libnfs.h" |
| 74 | #include "libnfs-raw.h" |
| 75 | #include "libnfs-private.h" |
| 76 | #include "slist.h" |
| 77 | |
| 78 | #ifdef WIN32 |
| 79 | //has to be included after stdlib!! |
| 80 | #include "win32_errnowrapper.h" |
| 81 | #endif |
| 82 | |
| 83 | static int rpc_reconnect_requeue(struct rpc_context *rpc); |
| 84 | static int rpc_connect_sockaddr_async(struct rpc_context *rpc, struct sockaddr_storage *s); |
| 85 | |
| 86 | static void set_nonblocking(int fd) |
| 87 | { |
| 88 | int v = 0; |
| 89 | #if defined(WIN32) |
| 90 | long nonblocking=1; |
| 91 | v = ioctl(fd, FIONBIO, &nonblocking); |
| 92 | #else |
| 93 | v = fcntl(fd, F_GETFL, 0); |
| 94 | fcntl(fd, F_SETFL, v | O_NONBLOCK); |
| 95 | #endif //FIXME |
| 96 | } |
| 97 | |
| 98 | #ifdef HAVE_NETINET_TCP_H |
| 99 | int set_tcp_sockopt(int sockfd, int optname, int value) |
| 100 | { |
| 101 | int level; |
| 102 | |
| 103 | #if defined(__FreeBSD__) || defined(__sun) || (defined(__APPLE__) && defined(__MACH__)) |
| 104 | struct protoent *buf; |
| 105 | |
| 106 | if ((buf = getprotobyname("tcp")) != NULL) |
| 107 | level = buf->p_proto; |
| 108 | else |
| 109 | return -1; |
| 110 | #else |
| 111 | level = SOL_TCP; |
| 112 | #endif |
| 113 | |
| 114 | return setsockopt(sockfd, level, optname, (char *)&value, sizeof(value)); |
| 115 | } |
| 116 | #endif |
| 117 | |
| 118 | int rpc_get_fd(struct rpc_context *rpc) |
| 119 | { |
| 120 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 121 | |
| 122 | return rpc->fd; |
| 123 | } |
| 124 | |
| 125 | int rpc_which_events(struct rpc_context *rpc) |
| 126 | { |
| 127 | int events; |
| 128 | |
| 129 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 130 | |
| 131 | events = rpc->is_connected ? POLLIN : POLLOUT; |
| 132 | |
| 133 | if (rpc->is_udp != 0) { |
| 134 | /* for udp sockets we only wait for pollin */ |
| 135 | return POLLIN; |
| 136 | } |
| 137 | |
| 138 | if (rpc->outqueue) { |
| 139 | events |= POLLOUT; |
| 140 | } |
| 141 | return events; |
| 142 | } |
| 143 | |
| 144 | static int rpc_write_to_socket(struct rpc_context *rpc) |
| 145 | { |
| 146 | int32_t count; |
| 147 | |
| 148 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 149 | |
| 150 | if (rpc->fd == -1) { |
| 151 | rpc_set_error(rpc, "trying to write but not connected"); |
| 152 | return -1; |
| 153 | } |
| 154 | |
| 155 | while (rpc->outqueue != NULL) { |
| 156 | int64_t total; |
| 157 | |
| 158 | total = rpc->outqueue->outdata.size; |
| 159 | |
| 160 | count = send(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written, 0); |
| 161 | if (count == -1) { |
| 162 | if (errno == EAGAIN || errno == EWOULDBLOCK) { |
| 163 | return 0; |
| 164 | } |
| 165 | rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno); |
| 166 | return -1; |
| 167 | } |
| 168 | |
| 169 | rpc->outqueue->written += count; |
| 170 | if (rpc->outqueue->written == total) { |
| 171 | struct rpc_pdu *pdu = rpc->outqueue; |
| 172 | |
| 173 | SLIST_REMOVE(&rpc->outqueue, pdu); |
| 174 | SLIST_ADD_END(&rpc->waitpdu, pdu); |
| 175 | } |
| 176 | } |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static int rpc_read_from_socket(struct rpc_context *rpc) |
| 181 | { |
| 182 | int available; |
| 183 | int size; |
| 184 | int pdu_size; |
| 185 | int32_t count; |
| 186 | |
| 187 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 188 | |
| 189 | if (ioctl(rpc->fd, FIONREAD, &available) != 0) { |
| 190 | rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno); |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | if (available == 0) { |
| 195 | rpc_set_error(rpc, "Socket has been closed"); |
| 196 | return -1; |
| 197 | } |
| 198 | |
| 199 | if (rpc->is_udp) { |
| 200 | char *buf; |
| 201 | socklen_t socklen = sizeof(rpc->udp_src); |
| 202 | |
| 203 | buf = malloc(available); |
| 204 | if (buf == NULL) { |
| 205 | rpc_set_error(rpc, "Failed to malloc buffer for recvfrom"); |
| 206 | return -1; |
| 207 | } |
| 208 | count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen); |
| 209 | if (count < 0) { |
| 210 | rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno)); |
| 211 | free(buf); |
| 212 | return -1; |
| 213 | } |
| 214 | if (rpc_process_pdu(rpc, buf, count) != 0) { |
| 215 | rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU"); |
| 216 | free(buf); |
| 217 | return -1; |
| 218 | } |
| 219 | free(buf); |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | /* read record marker, 4 bytes at the beginning of every pdu */ |
| 224 | if (rpc->inbuf == NULL) { |
| 225 | rpc->insize = 4; |
| 226 | rpc->inbuf = malloc(rpc->insize); |
| 227 | if (rpc->inbuf == NULL) { |
| 228 | rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno); |
| 229 | return -1; |
| 230 | } |
| 231 | } |
| 232 | if (rpc->inpos < 4) { |
| 233 | size = 4 - rpc->inpos; |
| 234 | |
| 235 | count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0); |
| 236 | if (count == -1) { |
| 237 | if (errno == EINTR) { |
| 238 | return 0; |
| 239 | } |
| 240 | rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno); |
| 241 | return -1; |
| 242 | } |
| 243 | available -= count; |
| 244 | rpc->inpos += count; |
| 245 | } |
| 246 | |
| 247 | if (available == 0) { |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | pdu_size = rpc_get_pdu_size(rpc->inbuf); |
| 252 | if (rpc->insize < pdu_size) { |
| 253 | unsigned char *buf; |
| 254 | |
| 255 | buf = malloc(pdu_size); |
| 256 | if (buf == NULL) { |
| 257 | rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno); |
| 258 | return -1; |
| 259 | } |
| 260 | memcpy(buf, rpc->inbuf, rpc->insize); |
| 261 | free(rpc->inbuf); |
| 262 | rpc->inbuf = buf; |
| 263 | rpc->insize = rpc_get_pdu_size(rpc->inbuf); |
| 264 | } |
| 265 | |
| 266 | size = available; |
| 267 | if (size > rpc->insize - rpc->inpos) { |
| 268 | size = rpc->insize - rpc->inpos; |
| 269 | } |
| 270 | |
| 271 | count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0); |
| 272 | if (count == -1) { |
| 273 | if (errno == EINTR) { |
| 274 | return 0; |
| 275 | } |
| 276 | rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno); |
| 277 | return -1; |
| 278 | } |
| 279 | available -= count; |
| 280 | rpc->inpos += count; |
| 281 | |
| 282 | if (rpc->inpos == rpc->insize) { |
| 283 | char *buf = rpc->inbuf; |
| 284 | |
| 285 | rpc->inbuf = NULL; |
| 286 | rpc->insize = 0; |
| 287 | rpc->inpos = 0; |
| 288 | |
| 289 | if (rpc_process_pdu(rpc, buf, pdu_size) != 0) { |
| 290 | rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket"); |
| 291 | return -1; |
| 292 | } |
| 293 | free(buf); |
| 294 | } |
| 295 | |
| 296 | return 0; |
| 297 | } |
| 298 | |
| 299 | |
| 300 | |
| 301 | int rpc_service(struct rpc_context *rpc, int revents) |
| 302 | { |
| 303 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 304 | |
| 305 | if (revents & POLLERR) { |
| 306 | #ifdef WIN32 |
| 307 | char err = 0; |
| 308 | #else |
| 309 | int err = 0; |
| 310 | #endif |
| 311 | socklen_t err_size = sizeof(err); |
| 312 | |
| 313 | if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR, |
| 314 | (char *)&err, &err_size) != 0 || err != 0) { |
| 315 | if (err == 0) { |
| 316 | err = errno; |
| 317 | } |
| 318 | rpc_set_error(rpc, "rpc_service: socket error " |
| 319 | "%s(%d).", |
| 320 | strerror(err), err); |
| 321 | } else { |
| 322 | rpc_set_error(rpc, "rpc_service: POLLERR, " |
| 323 | "Unknown socket error."); |
| 324 | } |
| 325 | if (rpc->connect_cb != NULL) { |
| 326 | rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data); |
| 327 | } |
| 328 | return -1; |
| 329 | } |
| 330 | if (revents & POLLHUP) { |
| 331 | rpc_set_error(rpc, "Socket failed with POLLHUP"); |
| 332 | if (rpc->connect_cb != NULL) { |
| 333 | rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data); |
| 334 | } |
| 335 | return -1; |
| 336 | } |
| 337 | |
| 338 | if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) { |
| 339 | int err = 0; |
| 340 | socklen_t err_size = sizeof(err); |
| 341 | |
| 342 | if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR, |
| 343 | (char *)&err, &err_size) != 0 || err != 0) { |
| 344 | if (err == 0) { |
| 345 | err = errno; |
| 346 | } |
| 347 | rpc_set_error(rpc, "rpc_service: socket error " |
| 348 | "%s(%d) while connecting.", |
| 349 | strerror(err), err); |
| 350 | if (rpc->connect_cb != NULL) { |
| 351 | rpc->connect_cb(rpc, RPC_STATUS_ERROR, |
| 352 | NULL, rpc->connect_data); |
| 353 | } |
| 354 | return -1; |
| 355 | } |
| 356 | |
| 357 | rpc->is_connected = 1; |
| 358 | if (rpc->connect_cb != NULL) { |
| 359 | rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data); |
| 360 | } |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | if (revents & POLLIN) { |
| 365 | if (rpc_read_from_socket(rpc) != 0) { |
| 366 | rpc_reconnect_requeue(rpc); |
| 367 | return 0; |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | if (revents & POLLOUT && rpc->outqueue != NULL) { |
| 372 | if (rpc_write_to_socket(rpc) != 0) { |
| 373 | rpc_set_error(rpc, "write to socket failed"); |
| 374 | return -1; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | void rpc_set_autoreconnect(struct rpc_context *rpc) |
| 382 | { |
| 383 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 384 | |
| 385 | rpc->auto_reconnect = 1; |
| 386 | } |
| 387 | |
| 388 | void rpc_unset_autoreconnect(struct rpc_context *rpc) |
| 389 | { |
| 390 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 391 | |
| 392 | rpc->auto_reconnect = 0; |
| 393 | } |
| 394 | |
| 395 | void rpc_set_tcp_syncnt(struct rpc_context *rpc, int v) |
| 396 | { |
| 397 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 398 | |
| 399 | rpc->tcp_syncnt = v; |
| 400 | } |
| 401 | |
| 402 | #ifndef TCP_SYNCNT |
| 403 | #define TCP_SYNCNT 7 |
| 404 | #endif |
| 405 | |
| 406 | static int rpc_connect_sockaddr_async(struct rpc_context *rpc, struct sockaddr_storage *s) |
| 407 | { |
| 408 | int socksize; |
| 409 | |
| 410 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 411 | |
| 412 | switch (s->ss_family) { |
| 413 | case AF_INET: |
| 414 | socksize = sizeof(struct sockaddr_in); |
| 415 | rpc->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 416 | #ifdef HAVE_NETINET_TCP_H |
| 417 | if (rpc->tcp_syncnt != RPC_PARAM_UNDEFINED) { |
| 418 | set_tcp_sockopt(rpc->fd, TCP_SYNCNT, rpc->tcp_syncnt); |
| 419 | } |
| 420 | #endif |
| 421 | break; |
| 422 | case AF_INET6: |
| 423 | socksize = sizeof(struct sockaddr_in6); |
| 424 | rpc->fd = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP); |
| 425 | #ifdef HAVE_NETINET_TCP_H |
| 426 | if (rpc->tcp_syncnt != RPC_PARAM_UNDEFINED) { |
| 427 | set_tcp_sockopt(rpc->fd, TCP_SYNCNT, rpc->tcp_syncnt); |
| 428 | } |
| 429 | #endif |
| 430 | break; |
| 431 | default: |
| 432 | rpc_set_error(rpc, "Can not handle AF_FAMILY:%d", s->ss_family); |
| 433 | return -1; |
| 434 | } |
| 435 | |
| 436 | if (rpc->fd == -1) { |
| 437 | rpc_set_error(rpc, "Failed to open socket"); |
| 438 | return -1; |
| 439 | } |
| 440 | |
| 441 | /* Some systems allow you to set capabilities on an executable |
| 442 | * to allow the file to be executed with privilege to bind to |
| 443 | * privileged system ports, even if the user is not root. |
| 444 | * |
| 445 | * Opportunistically try to bind the socket to a low numbered |
| 446 | * system port in the hope that the user is either root or the |
| 447 | * executable has the CAP_NET_BIND_SERVICE. |
| 448 | * |
| 449 | * As soon as we fail the bind() with EACCES we know we will never |
| 450 | * be able to bind to a system port so we terminate the loop. |
| 451 | * |
| 452 | * On linux, use |
| 453 | * sudo setcap 'cap_net_bind_service=+ep' /path/executable |
| 454 | * to make the executable able to bind to a system port. |
| 455 | * |
| 456 | * On Windows, there is no concept of privileged ports. Thus |
| 457 | * binding will usually succeed. |
| 458 | */ |
| 459 | { |
| 460 | struct sockaddr_storage ss; |
| 461 | static int portOfs = 0; |
| 462 | const int firstPort = 512; /* >= 512 according to Sun docs */ |
| 463 | const int portCount = IPPORT_RESERVED - firstPort; |
| 464 | int startOfs, port, rc; |
| 465 | |
| 466 | if (portOfs == 0) { |
| 467 | portOfs = time(NULL) % 400; |
| 468 | } |
| 469 | startOfs = portOfs; |
| 470 | do { |
| 471 | rc = -1; |
| 472 | port = htons(firstPort + portOfs); |
| 473 | portOfs = (portOfs + 1) % portCount; |
| 474 | |
| 475 | /* skip well-known ports */ |
| 476 | if (!getservbyport(port, "tcp")) { |
| 477 | memset(&ss, 0, sizeof(ss)); |
| 478 | |
| 479 | switch (s->ss_family) { |
| 480 | case AF_INET: |
| 481 | ((struct sockaddr_in *)&ss)->sin_port = port; |
| 482 | ((struct sockaddr_in *)&ss)->sin_family = AF_INET; |
| 483 | #ifdef HAVE_SOCKADDR_LEN |
| 484 | ((struct sockaddr_in *)&ss)->sin_len = sizeof(struct sockaddr_in); |
| 485 | #endif |
| 486 | break; |
| 487 | case AF_INET6: |
| 488 | ((struct sockaddr_in6 *)&ss)->sin6_port = port; |
| 489 | ((struct sockaddr_in6 *)&ss)->sin6_family = AF_INET6; |
| 490 | #ifdef HAVE_SOCKADDR_LEN |
| 491 | ((struct sockaddr_in6 *)&ss)->sin6_len = sizeof(struct sockaddr_in); |
| 492 | #endif |
| 493 | break; |
| 494 | } |
| 495 | |
| 496 | rc = bind(rpc->fd, (struct sockaddr *)&ss, socksize); |
| 497 | #if !defined(WIN32) |
| 498 | /* we got EACCES, so don't try again */ |
| 499 | if (rc != 0 && errno == EACCES) |
| 500 | break; |
| 501 | #endif |
| 502 | } |
| 503 | } while (rc != 0 && portOfs != startOfs); |
| 504 | } |
| 505 | |
| 506 | set_nonblocking(rpc->fd); |
| 507 | |
| 508 | if (connect(rpc->fd, (struct sockaddr *)s, socksize) != 0 && errno != EINPROGRESS) { |
| 509 | rpc_set_error(rpc, "connect() to server failed. %s(%d)", strerror(errno), errno); |
| 510 | return -1; |
| 511 | } |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | int rpc_connect_async(struct rpc_context *rpc, const char *server, int port, rpc_cb cb, void *private_data) |
| 517 | { |
| 518 | struct addrinfo *ai = NULL; |
| 519 | |
| 520 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 521 | |
| 522 | if (rpc->fd != -1) { |
| 523 | rpc_set_error(rpc, "Trying to connect while already connected"); |
| 524 | return -1; |
| 525 | } |
| 526 | |
| 527 | if (rpc->is_udp != 0) { |
| 528 | rpc_set_error(rpc, "Trying to connect on UDP socket"); |
| 529 | return -1; |
| 530 | } |
| 531 | |
| 532 | rpc->auto_reconnect = 0; |
| 533 | |
| 534 | if (getaddrinfo(server, NULL, NULL, &ai) != 0) { |
| 535 | rpc_set_error(rpc, "Invalid address:%s. " |
| 536 | "Can not resolv into IPv4/v6 structure.", server); |
| 537 | return -1; |
| 538 | } |
| 539 | |
| 540 | switch (ai->ai_family) { |
| 541 | case AF_INET: |
| 542 | ((struct sockaddr_in *)&rpc->s)->sin_family = ai->ai_family; |
| 543 | ((struct sockaddr_in *)&rpc->s)->sin_port = htons(port); |
| 544 | #ifdef HAVE_SOCKADDR_LEN |
| 545 | ((struct sockaddr_in *)&rpc->s)->sin_len = sizeof(struct sockaddr_in); |
| 546 | #endif |
| 547 | break; |
| 548 | case AF_INET6: |
| 549 | ((struct sockaddr_in6 *)&rpc->s)->sin6_family = ai->ai_family; |
| 550 | ((struct sockaddr_in6 *)&rpc->s)->sin6_port = htons(port); |
| 551 | #ifdef HAVE_SOCKADDR_LEN |
| 552 | ((struct sockaddr_in6 *)&rpc->s)->sin6_len = sizeof(struct sockaddr_in6); |
| 553 | #endif |
| 554 | break; |
| 555 | } |
| 556 | |
| 557 | rpc->connect_cb = cb; |
| 558 | rpc->connect_data = private_data; |
| 559 | |
| 560 | freeaddrinfo(ai); |
| 561 | |
| 562 | if (rpc_connect_sockaddr_async(rpc, &rpc->s) != 0) { |
| 563 | return -1; |
| 564 | } |
| 565 | |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | int rpc_disconnect(struct rpc_context *rpc, char *error) |
| 570 | { |
| 571 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 572 | |
| 573 | rpc_unset_autoreconnect(rpc); |
| 574 | |
| 575 | if (rpc->fd != -1) { |
| 576 | close(rpc->fd); |
| 577 | } |
| 578 | rpc->fd = -1; |
| 579 | |
| 580 | rpc->is_connected = 0; |
| 581 | |
| 582 | rpc_error_all_pdus(rpc, error); |
| 583 | |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | static void reconnect_cb(struct rpc_context *rpc, int status, void *data _U_, void *private_data) |
| 588 | { |
| 589 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 590 | |
| 591 | if (status != RPC_STATUS_SUCCESS) { |
| 592 | rpc_error_all_pdus(rpc, "RPC ERROR: Failed to reconnect async"); |
| 593 | return; |
| 594 | } |
| 595 | |
| 596 | rpc->is_connected = 1; |
| 597 | rpc->connect_cb = NULL; |
| 598 | } |
| 599 | |
| 600 | /* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue and reconnect */ |
| 601 | static int rpc_reconnect_requeue(struct rpc_context *rpc) |
| 602 | { |
| 603 | struct rpc_pdu *pdu; |
| 604 | |
| 605 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 606 | |
| 607 | if (rpc->fd != -1) { |
| 608 | close(rpc->fd); |
| 609 | } |
| 610 | rpc->fd = -1; |
| 611 | |
| 612 | rpc->is_connected = 0; |
| 613 | |
| 614 | /* socket is closed so we will not get any replies to any commands |
| 615 | * in flight. Move them all over from the waitpdu queue back to the out queue |
| 616 | */ |
| 617 | for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) { |
| 618 | SLIST_REMOVE(&rpc->waitpdu, pdu); |
| 619 | SLIST_ADD(&rpc->outqueue, pdu); |
| 620 | /* we have to re-send the whole pdu again */ |
| 621 | pdu->written = 0; |
| 622 | } |
| 623 | |
| 624 | if (rpc->auto_reconnect != 0) { |
| 625 | rpc->connect_cb = reconnect_cb; |
| 626 | |
| 627 | if (rpc_connect_sockaddr_async(rpc, &rpc->s) != 0) { |
| 628 | rpc_error_all_pdus(rpc, "RPC ERROR: Failed to reconnect async"); |
| 629 | return -1; |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port) |
| 638 | { |
| 639 | struct addrinfo *ai = NULL; |
| 640 | char service[6]; |
| 641 | |
| 642 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 643 | |
| 644 | if (rpc->is_udp == 0) { |
| 645 | rpc_set_error(rpc, "Cant not bind UDP. Not UDP context"); |
| 646 | return -1; |
| 647 | } |
| 648 | |
| 649 | sprintf(service, "%d", port); |
| 650 | if (getaddrinfo(addr, service, NULL, &ai) != 0) { |
| 651 | rpc_set_error(rpc, "Invalid address:%s. " |
| 652 | "Can not resolv into IPv4/v6 structure.", addr); |
| 653 | return -1; |
| 654 | } |
| 655 | |
| 656 | switch(ai->ai_family) { |
| 657 | case AF_INET: |
| 658 | rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0); |
| 659 | if (rpc->fd == -1) { |
| 660 | rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno)); |
| 661 | freeaddrinfo(ai); |
| 662 | return -1; |
| 663 | } |
| 664 | |
| 665 | if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) { |
| 666 | rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno)); |
| 667 | freeaddrinfo(ai); |
| 668 | return -1; |
| 669 | } |
| 670 | break; |
| 671 | default: |
| 672 | rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family); |
| 673 | freeaddrinfo(ai); |
| 674 | return -1; |
| 675 | } |
| 676 | |
| 677 | freeaddrinfo(ai); |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast) |
| 683 | { |
| 684 | struct addrinfo *ai = NULL; |
| 685 | char service[6]; |
| 686 | |
| 687 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 688 | |
| 689 | if (rpc->is_udp == 0) { |
| 690 | rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context"); |
| 691 | return -1; |
| 692 | } |
| 693 | |
| 694 | sprintf(service, "%d", port); |
| 695 | if (getaddrinfo(addr, service, NULL, &ai) != 0) { |
| 696 | rpc_set_error(rpc, "Invalid address:%s. " |
| 697 | "Can not resolv into IPv4/v6 structure.", addr); |
| 698 | return -1; |
| 699 | } |
| 700 | |
| 701 | if (rpc->udp_dest) { |
| 702 | free(rpc->udp_dest); |
| 703 | rpc->udp_dest = NULL; |
| 704 | } |
| 705 | rpc->udp_dest = malloc(ai->ai_addrlen); |
| 706 | if (rpc->udp_dest == NULL) { |
| 707 | rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure"); |
| 708 | freeaddrinfo(ai); |
| 709 | return -1; |
| 710 | } |
| 711 | memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen); |
| 712 | freeaddrinfo(ai); |
| 713 | |
| 714 | rpc->is_broadcast = is_broadcast; |
| 715 | setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, (char *)&is_broadcast, sizeof(is_broadcast)); |
| 716 | |
| 717 | return 0; |
| 718 | } |
| 719 | |
| 720 | struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc) |
| 721 | { |
| 722 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 723 | |
| 724 | return (struct sockaddr *)&rpc->udp_src; |
| 725 | } |
| 726 | |
| 727 | int rpc_queue_length(struct rpc_context *rpc) |
| 728 | { |
| 729 | int i=0; |
| 730 | struct rpc_pdu *pdu; |
| 731 | |
| 732 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 733 | |
| 734 | for(pdu = rpc->outqueue; pdu; pdu = pdu->next) { |
| 735 | i++; |
| 736 | } |
| 737 | for(pdu = rpc->waitpdu; pdu; pdu = pdu->next) { |
| 738 | i++; |
| 739 | } |
| 740 | return i; |
| 741 | } |
| 742 | |
| 743 | void rpc_set_fd(struct rpc_context *rpc, int fd) |
| 744 | { |
| 745 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
| 746 | |
| 747 | rpc->fd = fd; |
| 748 | } |