The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 1 | /* Copyright (C) 2007-2008 The Android Open Source Project |
| 2 | ** |
| 3 | ** This software is licensed under the terms of the GNU General Public |
| 4 | ** License version 2, as published by the Free Software Foundation, and |
| 5 | ** may be copied, distributed, and modified under those terms. |
| 6 | ** |
| 7 | ** This program is distributed in the hope that it will be useful, |
| 8 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | ** GNU General Public License for more details. |
| 11 | */ |
| 12 | #include "sockets.h" |
| 13 | #include "qemu-common.h" |
| 14 | #include <fcntl.h> |
| 15 | #include <stddef.h> |
| 16 | #include "qemu_debug.h" |
| 17 | #include <stdlib.h> |
| 18 | #include <string.h> |
| 19 | #include "android/utils/path.h" |
| 20 | |
| 21 | #ifdef _WIN32 |
| 22 | # define xxWIN32_LEAN_AND_MEAN |
| 23 | # include <windows.h> |
| 24 | # include <winsock2.h> |
| 25 | # include <ws2tcpip.h> |
| 26 | #else /* !_WIN32 */ |
| 27 | # include <sys/ioctl.h> |
| 28 | # include <sys/socket.h> |
| 29 | # include <netinet/in.h> |
| 30 | # include <netinet/tcp.h> |
| 31 | # include <netdb.h> |
| 32 | # if HAVE_UNIX_SOCKETS |
| 33 | # include <sys/un.h> |
| 34 | # ifndef UNIX_PATH_MAX |
| 35 | # define UNIX_PATH_MAX (sizeof(((struct sockaddr_un*)0)->sun_path)-1) |
| 36 | # endif |
| 37 | # endif |
| 38 | #endif /* !_WIN32 */ |
| 39 | |
| 40 | |
| 41 | |
| 42 | /* QSOCKET_CALL is used to deal with the fact that EINTR happens pretty |
| 43 | * easily in QEMU since we use SIGALRM to implement periodic timers |
| 44 | */ |
| 45 | #ifdef _WIN32 |
| 46 | # define QSOCKET_CALL(_ret,_cmd) \ |
| 47 | do { _ret = (_cmd); } while ( _ret < 0 && WSAGetLastError() == WSAEINTR ) |
| 48 | #else |
| 49 | # define QSOCKET_CALL(_ret,_cmd) \ |
| 50 | do { _ret = (_cmd); } while ( _ret < 0 && errno == EINTR ) |
| 51 | #endif |
| 52 | |
| 53 | #ifdef _WIN32 |
| 54 | |
| 55 | #include <errno.h> |
| 56 | |
| 57 | static int winsock_error; |
| 58 | |
| 59 | #define WINSOCK_ERRORS_LIST \ |
| 60 | EE(WSA_INVALID_HANDLE,EINVAL,"invalid handle") \ |
| 61 | EE(WSA_NOT_ENOUGH_MEMORY,ENOMEM,"not enough memory") \ |
| 62 | EE(WSA_INVALID_PARAMETER,EINVAL,"invalid parameter") \ |
| 63 | EE(WSAEINTR,EINTR,"interrupted function call") \ |
| 64 | EE(WSAEALREADY,EALREADY,"operation already in progress") \ |
| 65 | EE(WSAEBADF,EBADF,"bad file descriptor") \ |
| 66 | EE(WSAEACCES,EACCES,"permission denied") \ |
| 67 | EE(WSAEFAULT,EFAULT,"bad address") \ |
| 68 | EE(WSAEINVAL,EINVAL,"invalid argument") \ |
| 69 | EE(WSAEMFILE,EMFILE,"too many opened files") \ |
| 70 | EE(WSAEWOULDBLOCK,EAGAIN,"resource temporarily unavailable") \ |
| 71 | EE(WSAEINPROGRESS,EAGAIN,"operation now in progress") \ |
| 72 | EE(WSAEALREADY,EAGAIN,"operation already in progress") \ |
| 73 | EE(WSAENOTSOCK,EBADF,"socket operation not on socket") \ |
| 74 | EE(WSAEDESTADDRREQ,EDESTADDRREQ,"destination address required") \ |
| 75 | EE(WSAEMSGSIZE,EMSGSIZE,"message too long") \ |
| 76 | EE(WSAEPROTOTYPE,EPROTOTYPE,"wrong protocol type for socket") \ |
| 77 | EE(WSAENOPROTOOPT,ENOPROTOOPT,"bad protocol option") \ |
| 78 | EE(WSAEADDRINUSE,EADDRINUSE,"address already in use") \ |
| 79 | EE(WSAEADDRNOTAVAIL,EADDRNOTAVAIL,"cannot assign requested address") \ |
| 80 | EE(WSAENETDOWN,ENETDOWN,"network is down") \ |
| 81 | EE(WSAENETUNREACH,ENETUNREACH,"network unreachable") \ |
| 82 | EE(WSAENETRESET,ENETRESET,"network dropped connection on reset") \ |
| 83 | EE(WSAECONNABORTED,ECONNABORTED,"software caused connection abort") \ |
| 84 | EE(WSAECONNRESET,ECONNRESET,"connection reset by peer") \ |
| 85 | EE(WSAENOBUFS,ENOBUFS,"no buffer space available") \ |
| 86 | EE(WSAEISCONN,EISCONN,"socket is already connected") \ |
| 87 | EE(WSAENOTCONN,ENOTCONN,"socket is not connected") \ |
| 88 | EE(WSAESHUTDOWN,ESHUTDOWN,"cannot send after socket shutdown") \ |
| 89 | EE(WSAETOOMANYREFS,ETOOMANYREFS,"too many references") \ |
| 90 | EE(WSAETIMEDOUT,ETIMEDOUT,"connection timed out") \ |
| 91 | EE(WSAECONNREFUSED,ECONNREFUSED,"connection refused") \ |
| 92 | EE(WSAELOOP,ELOOP,"cannot translate name") \ |
| 93 | EE(WSAENAMETOOLONG,ENAMETOOLONG,"name too long") \ |
| 94 | EE(WSAEHOSTDOWN,EHOSTDOWN,"host is down") \ |
| 95 | EE(WSAEHOSTUNREACH,EHOSTUNREACH,"no route to host") \ |
| 96 | |
| 97 | typedef struct { |
| 98 | int winsock; |
| 99 | int unix; |
| 100 | const char* string; |
| 101 | } WinsockError; |
| 102 | |
| 103 | static const WinsockError _winsock_errors[] = { |
| 104 | #define EE(w,u,s) { w, u, s }, |
| 105 | WINSOCK_ERRORS_LIST |
| 106 | #undef EE |
| 107 | { -1, -1, NULL } |
| 108 | }; |
| 109 | |
| 110 | /* this function reads the latest winsock error code and updates |
| 111 | * errno to a matching value. It also returns the new value of |
| 112 | * errno. |
| 113 | */ |
| 114 | static int |
| 115 | _fix_errno( void ) |
| 116 | { |
| 117 | const WinsockError* werr = _winsock_errors; |
| 118 | int unix = EINVAL; /* generic error code */ |
| 119 | |
| 120 | for ( ; werr->string != NULL; werr++ ) { |
| 121 | if (werr->winsock == winsock_error) { |
| 122 | unix = werr->unix; |
| 123 | break; |
| 124 | } |
| 125 | } |
| 126 | errno = unix; |
| 127 | return -1; |
| 128 | } |
| 129 | |
| 130 | static int |
| 131 | _set_errno( int code ) |
| 132 | { |
| 133 | winsock_error = -1; |
| 134 | errno = code; |
| 135 | return -1; |
| 136 | } |
| 137 | |
| 138 | /* this function returns a string describing the latest Winsock error */ |
| 139 | const char* |
| 140 | _errno_str(void) |
| 141 | { |
| 142 | const WinsockError* werr = _winsock_errors; |
| 143 | const char* result = "<unknown error>"; |
| 144 | |
| 145 | for ( ; werr->string; werr++ ) { |
| 146 | if (werr->winsock == winsock_error) { |
| 147 | result = werr->string; |
| 148 | break; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | if (result == NULL) |
| 153 | result = strerror(errno); |
| 154 | |
| 155 | return result; |
| 156 | } |
| 157 | #else |
| 158 | static int |
| 159 | _fix_errno( void ) |
| 160 | { |
| 161 | return -1; |
| 162 | } |
| 163 | |
| 164 | static int |
| 165 | _set_errno( int code ) |
| 166 | { |
| 167 | errno = code; |
| 168 | return -1; |
| 169 | } |
| 170 | #endif |
| 171 | |
| 172 | /* socket types */ |
| 173 | |
| 174 | static int |
| 175 | socket_family_to_bsd( SocketFamily family ) |
| 176 | { |
| 177 | switch (family) { |
| 178 | case SOCKET_INET: return AF_INET; |
| 179 | case SOCKET_IN6: return AF_INET6; |
| 180 | #if HAVE_UNIX_SOCKETS |
| 181 | case SOCKET_UNIX: return AF_LOCAL; |
| 182 | #endif |
| 183 | default: return -1; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | socket_type_to_bsd( SocketType type ) |
| 189 | { |
| 190 | switch (type) { |
| 191 | case SOCKET_DGRAM: return SOCK_DGRAM; |
| 192 | case SOCKET_STREAM: return SOCK_STREAM; |
| 193 | default: return -1; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | static SocketType |
| 198 | socket_type_from_bsd( int type ) |
| 199 | { |
| 200 | switch (type) { |
| 201 | case SOCK_DGRAM: return SOCKET_DGRAM; |
| 202 | case SOCK_STREAM: return SOCKET_STREAM; |
| 203 | default: return (SocketType) -1; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | #if 0 |
| 208 | static int |
| 209 | socket_type_check( SocketType type ) |
| 210 | { |
| 211 | return (type == SOCKET_DGRAM || type == SOCKET_STREAM); |
| 212 | } |
| 213 | #endif |
| 214 | |
| 215 | /* socket addresses */ |
| 216 | |
| 217 | void |
| 218 | sock_address_init_inet( SockAddress* a, uint32_t ip, uint16_t port ) |
| 219 | { |
| 220 | a->family = SOCKET_INET; |
| 221 | a->u.inet.port = port; |
| 222 | a->u.inet.address = ip; |
| 223 | } |
| 224 | |
| 225 | void |
| 226 | sock_address_init_in6 ( SockAddress* a, const uint8_t* ip6[16], uint16_t port ) |
| 227 | { |
| 228 | a->family = SOCKET_IN6; |
| 229 | a->u.in6.port = port; |
| 230 | memcpy( a->u.in6.address, ip6, sizeof(a->u.in6.address) ); |
| 231 | } |
| 232 | |
| 233 | void |
| 234 | sock_address_init_unix( SockAddress* a, const char* path ) |
| 235 | { |
| 236 | a->family = SOCKET_UNIX; |
| 237 | a->u._unix.path = strdup(path ? path : ""); |
| 238 | a->u._unix.owner = 1; |
| 239 | } |
| 240 | |
| 241 | void sock_address_done( SockAddress* a ) |
| 242 | { |
| 243 | if (a->family == SOCKET_UNIX && a->u._unix.owner) { |
| 244 | a->u._unix.owner = 0; |
| 245 | free((char*)a->u._unix.path); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | static char* |
| 250 | format_char( char* buf, char* end, int c ) |
| 251 | { |
| 252 | if (buf >= end) |
| 253 | return buf; |
| 254 | if (buf+1 == end) |
| 255 | c = 0; |
| 256 | *buf++ = (char) c; |
| 257 | return buf; |
| 258 | } |
| 259 | |
| 260 | static char* |
| 261 | format_str( char* buf, char* end, const char* str ) |
| 262 | { |
| 263 | int len = strlen(str); |
| 264 | int avail = end - buf; |
| 265 | |
| 266 | if (len > avail) |
| 267 | len = avail; |
| 268 | |
| 269 | memcpy( buf, str, len ); |
| 270 | buf += len; |
| 271 | |
| 272 | if (buf == end) |
| 273 | buf[-1] = 0; |
| 274 | else |
| 275 | buf[0] = 0; |
| 276 | |
| 277 | return buf; |
| 278 | } |
| 279 | |
| 280 | static char* |
| 281 | format_unsigned( char* buf, char* end, unsigned val ) |
| 282 | { |
| 283 | char temp[16]; |
| 284 | int nn; |
| 285 | |
| 286 | for ( nn = 0; val != 0; nn++ ) { |
| 287 | int rem = val % 10; |
| 288 | temp[nn] = '0'+rem; |
| 289 | val /= 10; |
| 290 | } |
| 291 | |
| 292 | if (nn == 0) |
| 293 | temp[nn++] = '0'; |
| 294 | |
| 295 | while (nn > 0) |
| 296 | buf = format_char(buf, end, temp[--nn]); |
| 297 | |
| 298 | return buf; |
| 299 | } |
| 300 | |
| 301 | static char* |
| 302 | format_hex( char* buf, char* end, unsigned val, int ndigits ) |
| 303 | { |
| 304 | int shift = 4*ndigits; |
| 305 | static const char hex[16] = "0123456789abcdef"; |
| 306 | |
| 307 | while (shift >= 0) { |
| 308 | buf = format_char(buf, end, hex[(val >> shift) & 15]); |
| 309 | shift -= 4; |
| 310 | } |
| 311 | return buf; |
| 312 | } |
| 313 | |
| 314 | static char* |
| 315 | format_ip4( char* buf, char* end, uint32_t ip ) |
| 316 | { |
| 317 | buf = format_unsigned( buf, end, (unsigned)(ip >> 24) ); |
| 318 | buf = format_char( buf, end, '.'); |
| 319 | buf = format_unsigned( buf, end, (unsigned)((ip >> 16) & 255)); |
| 320 | buf = format_char( buf, end, '.'); |
| 321 | buf = format_unsigned( buf, end, (unsigned)((ip >> 8) & 255)); |
| 322 | buf = format_char( buf, end, '.'); |
| 323 | buf = format_unsigned( buf, end, (unsigned)(ip & 255)); |
| 324 | return buf; |
| 325 | } |
| 326 | |
| 327 | static char* |
| 328 | format_ip6( char* buf, char* end, const uint8_t* ip6 ) |
| 329 | { |
| 330 | int nn; |
| 331 | for (nn = 0; nn < 8; nn++) { |
| 332 | int val = (ip6[0] << 16) | ip6[1]; |
| 333 | ip6 += 2; |
| 334 | if (nn > 0) |
| 335 | buf = format_char(buf, end, ':'); |
| 336 | if (val == 0) |
| 337 | continue; |
| 338 | buf = format_hex(buf, end, val, 4); |
| 339 | } |
| 340 | return buf; |
| 341 | } |
| 342 | |
| 343 | const char* |
| 344 | sock_address_to_string( const SockAddress* a ) |
| 345 | { |
| 346 | static char buf0[MAX_PATH]; |
| 347 | char *buf = buf0, *end = buf + sizeof(buf0); |
| 348 | |
| 349 | switch (a->family) { |
| 350 | case SOCKET_INET: |
| 351 | buf = format_ip4( buf, end, a->u.inet.address ); |
| 352 | buf = format_char( buf, end, ':' ); |
| 353 | buf = format_unsigned( buf, end, (unsigned) a->u.inet.port ); |
| 354 | break; |
| 355 | |
| 356 | case SOCKET_IN6: |
| 357 | buf = format_ip6( buf, end, a->u.in6.address ); |
| 358 | buf = format_char( buf, end, ':' ); |
| 359 | buf = format_unsigned( buf, end, (unsigned) a->u.in6.port ); |
| 360 | break; |
| 361 | |
| 362 | case SOCKET_UNIX: |
| 363 | buf = format_str( buf, end, a->u._unix.path ); |
| 364 | break; |
| 365 | |
| 366 | default: |
| 367 | return NULL; |
| 368 | } |
| 369 | |
| 370 | return buf0; |
| 371 | } |
| 372 | |
| 373 | int |
| 374 | sock_address_equal( const SockAddress* a, const SockAddress* b ) |
| 375 | { |
| 376 | if (a->family != b->family) |
| 377 | return 0; |
| 378 | |
| 379 | switch (a->family) { |
| 380 | case SOCKET_INET: |
| 381 | return (a->u.inet.address == b->u.inet.address && |
| 382 | a->u.inet.port == b->u.inet.port); |
| 383 | |
| 384 | case SOCKET_IN6: |
| 385 | return (!memcmp(a->u.in6.address, b->u.in6.address, 16) && |
| 386 | a->u.in6.port == b->u.in6.port); |
| 387 | |
| 388 | case SOCKET_UNIX: |
| 389 | return (!strcmp(a->u._unix.path, b->u._unix.path)); |
| 390 | |
| 391 | default: |
| 392 | return 0; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | int |
| 397 | sock_address_get_port( const SockAddress* a ) |
| 398 | { |
| 399 | switch (a->family) { |
| 400 | case SOCKET_INET: |
| 401 | return a->u.inet.port; |
| 402 | case SOCKET_IN6: |
| 403 | return a->u.in6.port; |
| 404 | default: |
| 405 | return -1; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | void |
| 410 | sock_address_set_port( SockAddress* a, uint16_t port ) |
| 411 | { |
| 412 | switch (a->family) { |
| 413 | case SOCKET_INET: |
| 414 | a->u.inet.port = port; |
| 415 | break; |
| 416 | case SOCKET_IN6: |
| 417 | a->u.in6.port = port; |
| 418 | break; |
| 419 | default: |
| 420 | ; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | const char* |
| 425 | sock_address_get_path( const SockAddress* a ) |
| 426 | { |
| 427 | if (a->family == SOCKET_UNIX) |
| 428 | return a->u._unix.path; |
| 429 | else |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | int |
| 434 | sock_address_get_ip( const SockAddress* a ) |
| 435 | { |
| 436 | if (a->family == SOCKET_INET) |
| 437 | return a->u.inet.address; |
| 438 | |
| 439 | return -1; |
| 440 | } |
| 441 | |
| 442 | #if 0 |
| 443 | char* |
| 444 | bufprint_sock_address( char* p, char* end, const SockAddress* a ) |
| 445 | { |
| 446 | switch (a->family) { |
| 447 | case SOCKET_INET: |
| 448 | { |
| 449 | uint32_t ip = a->u.inet.address; |
| 450 | |
| 451 | return bufprint( p, end, "%d.%d.%d.%d:%d", |
| 452 | (ip >> 24) & 255, (ip >> 16) & 255, |
| 453 | (ip >> 8) & 255, ip & 255, |
| 454 | a->u.inet.port ); |
| 455 | } |
| 456 | case SOCKET_IN6: |
| 457 | { |
| 458 | int nn = 0; |
| 459 | const char* column = ""; |
| 460 | const uint8_t* tab = a->u.in6.address; |
| 461 | for (nn = 0; nn < 16; nn += 2) { |
| 462 | p = bufprint(p, end, "%s%04x", column, (tab[n] << 8) | tab[n+1]); |
| 463 | column = ":"; |
| 464 | } |
| 465 | return bufprint(p, end, ":%d", a->u.in6.port); |
| 466 | } |
| 467 | case SOCKET_UNIX: |
| 468 | { |
| 469 | return bufprint(p, end, "%s", a->u._unix.path); |
| 470 | } |
| 471 | default: |
| 472 | return p; |
| 473 | } |
| 474 | } |
| 475 | #endif |
| 476 | |
| 477 | int |
| 478 | sock_address_to_bsd( const SockAddress* a, void* paddress, size_t *psize ) |
| 479 | { |
| 480 | switch (a->family) { |
| 481 | case SOCKET_INET: |
| 482 | { |
| 483 | struct sockaddr_in* dst = (struct sockaddr_in*) paddress; |
| 484 | |
| 485 | *psize = sizeof(*dst); |
| 486 | |
| 487 | memset( paddress, 0, *psize ); |
| 488 | |
| 489 | dst->sin_family = AF_INET; |
| 490 | dst->sin_port = htons(a->u.inet.port); |
| 491 | dst->sin_addr.s_addr = htonl(a->u.inet.address); |
| 492 | } |
| 493 | break; |
| 494 | |
| 495 | #if HAVE_IN6_SOCKETS |
| 496 | case SOCKET_IN6: |
| 497 | { |
| 498 | struct sockaddr_in6* dst = (struct sockaddr_in6*) paddress; |
| 499 | |
| 500 | *psize = sizeof(*dst); |
| 501 | |
| 502 | memset( paddress, 0, *psize ); |
| 503 | |
| 504 | dst->sin6_family = AF_INET6; |
| 505 | dst->sin6_port = htons(a->u.in6.port); |
| 506 | memcpy( dst->sin6_addr.s6_addr, a->u.in6.address, 16 ); |
| 507 | } |
| 508 | break; |
| 509 | #endif /* HAVE_IN6_SOCKETS */ |
| 510 | |
| 511 | #if HAVE_UNIX_SOCKETS |
| 512 | case SOCKET_UNIX: |
| 513 | { |
| 514 | int slen = strlen(a->u._unix.path); |
| 515 | struct sockaddr_un* dst = (struct sockaddr_un*) paddress; |
| 516 | |
| 517 | if (slen >= UNIX_PATH_MAX) |
| 518 | return -1; |
| 519 | |
| 520 | memset( paddress, 0, sizeof(*dst) ); |
| 521 | |
| 522 | dst->sun_family = AF_LOCAL; |
| 523 | memcpy( dst->sun_path, a->u._unix.path, slen ); |
| 524 | dst->sun_path[slen] = 0; |
| 525 | |
| 526 | *psize = (char*)&dst->sun_path[slen+1] - (char*)dst; |
| 527 | } |
| 528 | break; |
| 529 | #endif /* HAVE_UNIX_SOCKETS */ |
| 530 | |
| 531 | default: |
| 532 | return _set_errno(EINVAL); |
| 533 | } |
| 534 | |
| 535 | return 0; |
| 536 | } |
| 537 | |
| 538 | int |
| 539 | sock_address_to_inet( SockAddress* a, int *paddr_ip, int *paddr_port ) |
| 540 | { |
| 541 | struct sockaddr addr; |
| 542 | socklen_t addrlen; |
| 543 | |
| 544 | if (a->family != SOCKET_INET) { |
| 545 | return _set_errno(EINVAL); |
| 546 | } |
| 547 | |
| 548 | if (sock_address_to_bsd(a, &addr, &addrlen) < 0) |
| 549 | return -1; |
| 550 | |
| 551 | *paddr_ip = ntohl(((struct sockaddr_in*)&addr)->sin_addr.s_addr); |
| 552 | *paddr_port = ntohs(((struct sockaddr_in*)&addr)->sin_port); |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | int |
| 558 | sock_address_from_bsd( SockAddress* a, const void* from, size_t fromlen ) |
| 559 | { |
| 560 | switch (((struct sockaddr*)from)->sa_family) { |
| 561 | case AF_INET: |
| 562 | { |
| 563 | struct sockaddr_in* src = (struct sockaddr_in*) from; |
| 564 | |
| 565 | if (fromlen < sizeof(*src)) |
| 566 | return _set_errno(EINVAL); |
| 567 | |
| 568 | a->family = SOCKET_INET; |
| 569 | a->u.inet.port = ntohs(src->sin_port); |
| 570 | a->u.inet.address = ntohl(src->sin_addr.s_addr); |
| 571 | } |
| 572 | break; |
| 573 | |
| 574 | #ifdef HAVE_IN6_SOCKETS |
| 575 | case AF_INET6: |
| 576 | { |
| 577 | struct sockaddr_in6* src = (struct sockaddr_in6*) from; |
| 578 | |
| 579 | if (fromlen < sizeof(*src)) |
| 580 | return _set_errno(EINVAL); |
| 581 | |
| 582 | a->family = SOCKET_IN6; |
| 583 | a->u.in6.port = ntohs(src->sin6_port); |
| 584 | memcpy(a->u.in6.address, src->sin6_addr.s6_addr, 16); |
| 585 | } |
| 586 | break; |
| 587 | #endif |
| 588 | |
| 589 | #ifdef HAVE_UNIX_SOCKETS |
| 590 | case AF_LOCAL: |
| 591 | { |
| 592 | struct sockaddr_un* src = (struct sockaddr_un*) from; |
| 593 | char* end; |
| 594 | |
| 595 | if (fromlen < sizeof(*src)) |
| 596 | return _set_errno(EINVAL); |
| 597 | |
| 598 | /* check that the path is zero-terminated */ |
| 599 | end = memchr(src->sun_path, 0, UNIX_PATH_MAX); |
| 600 | if (end == NULL) |
| 601 | return _set_errno(EINVAL); |
| 602 | |
| 603 | a->family = SOCKET_UNIX; |
| 604 | a->u._unix.owner = 1; |
| 605 | a->u._unix.path = strdup(src->sun_path); |
| 606 | } |
| 607 | break; |
| 608 | #endif |
| 609 | |
| 610 | default: |
| 611 | return _set_errno(EINVAL); |
| 612 | } |
| 613 | return 0; |
| 614 | } |
| 615 | |
| 616 | |
| 617 | int |
| 618 | sock_address_init_resolve( SockAddress* a, const char* hostname, uint16_t port, int preferIn6 ) |
| 619 | { |
| 620 | struct addrinfo hints[1]; |
| 621 | struct addrinfo* res; |
| 622 | int ret; |
| 623 | |
| 624 | memset(hints, 0, sizeof(hints)); |
| 625 | hints->ai_family = preferIn6 ? AF_INET6 : AF_UNSPEC; |
| 626 | |
| 627 | if (getaddrinfo(hostname, NULL, hints, &res) < 0) { |
| 628 | return _fix_errno(); |
| 629 | } |
| 630 | |
| 631 | ret = sock_address_from_bsd( a, res->ai_addr, res->ai_addrlen ); |
| 632 | freeaddrinfo(res); |
| 633 | |
| 634 | /* need to set the port */ |
| 635 | switch (a->family) { |
| 636 | case SOCKET_INET: a->u.inet.port = port; break; |
| 637 | case SOCKET_IN6: a->u.in6.port = port; break; |
| 638 | default: ; |
| 639 | } |
| 640 | |
| 641 | return ret; |
| 642 | } |
| 643 | |
| 644 | |
| 645 | int |
| 646 | socket_create( SocketFamily family, SocketType type ) |
| 647 | { |
| 648 | int ret; |
| 649 | int sfamily = socket_family_to_bsd(family); |
| 650 | int stype = socket_type_to_bsd(type); |
| 651 | |
| 652 | if (sfamily < 0 || stype < 0) { |
| 653 | return _set_errno(EINVAL); |
| 654 | } |
| 655 | |
| 656 | QSOCKET_CALL(ret, socket(sfamily, stype, 0)); |
| 657 | if (ret < 0) |
| 658 | return _fix_errno(); |
| 659 | |
| 660 | return ret; |
| 661 | } |
| 662 | |
| 663 | |
| 664 | int |
| 665 | socket_create_inet( SocketType type ) |
| 666 | { |
| 667 | return socket_create( SOCKET_INET, type ); |
| 668 | } |
| 669 | |
| 670 | #if HAVE_IN6_SOCKETS |
| 671 | int |
| 672 | socket_create_in6 ( SocketType type ) |
| 673 | { |
| 674 | return socket_create( SOCKET_IN6, type ); |
| 675 | } |
| 676 | #endif |
| 677 | |
| 678 | #if HAVE_UNIX_SOCKETS |
| 679 | int |
| 680 | socket_create_unix( SocketType type ) |
| 681 | { |
| 682 | return socket_create( SOCKET_UNIX, type ); |
| 683 | } |
| 684 | #endif |
| 685 | |
| 686 | int socket_can_read(int fd) |
| 687 | { |
| 688 | #ifdef _WIN32 |
| 689 | unsigned long opt; |
| 690 | |
| 691 | if (ioctlsocket(fd, FIONREAD, &opt) < 0) |
| 692 | return 0; |
| 693 | |
| 694 | return opt; |
| 695 | #else |
| 696 | int opt; |
| 697 | |
| 698 | if (ioctl(fd, FIONREAD, &opt) < 0) |
| 699 | return 0; |
| 700 | |
| 701 | return opt; |
| 702 | #endif |
| 703 | } |
| 704 | |
| 705 | #define SOCKET_CALL(cmd) \ |
| 706 | int ret; \ |
| 707 | QSOCKET_CALL(ret, (cmd)); \ |
| 708 | if (ret < 0) \ |
| 709 | return _fix_errno(); \ |
| 710 | return ret; \ |
| 711 | |
| 712 | int |
| 713 | socket_send(int fd, const void* buf, int buflen) |
| 714 | { |
| 715 | SOCKET_CALL(send(fd, buf, buflen, 0)) |
| 716 | } |
| 717 | |
| 718 | int |
| 719 | socket_send_oob( int fd, const void* buf, int buflen ) |
| 720 | { |
| 721 | SOCKET_CALL(send(fd, buf, buflen, MSG_OOB)); |
| 722 | } |
| 723 | |
| 724 | int |
| 725 | socket_sendto(int fd, const void* buf, int buflen, const SockAddress* to) |
| 726 | { |
| 727 | struct sockaddr sa; |
| 728 | socklen_t salen; |
| 729 | |
| 730 | if (sock_address_to_bsd(to, &sa, &salen) < 0) |
| 731 | return -1; |
| 732 | |
| 733 | SOCKET_CALL(sendto(fd, buf, buflen, 0, &sa, salen)); |
| 734 | } |
| 735 | |
| 736 | int |
| 737 | socket_recv(int fd, void* buf, int len) |
| 738 | { |
| 739 | SOCKET_CALL(recv(fd, buf, len, 0)); |
| 740 | } |
| 741 | |
| 742 | int |
| 743 | socket_recvfrom(int fd, void* buf, int len, SockAddress* from) |
| 744 | { |
| 745 | struct sockaddr sa; |
| 746 | socklen_t salen = sizeof(sa); |
| 747 | int ret; |
| 748 | |
| 749 | QSOCKET_CALL(ret,recvfrom(fd,buf,len,0,&sa,&salen)); |
| 750 | if (ret < 0) |
| 751 | return _fix_errno(); |
| 752 | |
| 753 | if (sock_address_from_bsd(from, &sa, salen) < 0) |
| 754 | return -1; |
| 755 | |
| 756 | return ret; |
| 757 | } |
| 758 | |
| 759 | int |
| 760 | socket_connect( int fd, const SockAddress* address ) |
| 761 | { |
| 762 | struct sockaddr addr; |
| 763 | socklen_t addrlen; |
| 764 | |
| 765 | if (sock_address_to_bsd(address, &addr, &addrlen) < 0) |
| 766 | return -1; |
| 767 | |
| 768 | SOCKET_CALL(connect(fd,&addr,addrlen)); |
| 769 | } |
| 770 | |
| 771 | int |
| 772 | socket_bind( int fd, const SockAddress* address ) |
| 773 | { |
| 774 | struct sockaddr addr; |
| 775 | socklen_t addrlen; |
| 776 | |
| 777 | if (sock_address_to_bsd(address, &addr, &addrlen) < 0) |
| 778 | return -1; |
| 779 | |
| 780 | SOCKET_CALL(bind(fd, &addr, addrlen)); |
| 781 | } |
| 782 | |
| 783 | int |
| 784 | socket_get_address( int fd, SockAddress* address ) |
| 785 | { |
| 786 | struct sockaddr addr; |
| 787 | socklen_t addrlen = sizeof(addr); |
| 788 | int ret; |
| 789 | |
| 790 | QSOCKET_CALL(ret, getsockname(fd, &addr, &addrlen)); |
| 791 | if (ret < 0) |
| 792 | return _fix_errno(); |
| 793 | |
| 794 | return sock_address_from_bsd(address, &addr, addrlen); |
| 795 | } |
| 796 | |
| 797 | int |
| 798 | socket_listen( int fd, int backlog ) |
| 799 | { |
| 800 | SOCKET_CALL(listen(fd, backlog)); |
| 801 | } |
| 802 | |
| 803 | int |
| 804 | socket_accept( int fd, SockAddress* address ) |
| 805 | { |
| 806 | struct sockaddr addr; |
| 807 | socklen_t addrlen = sizeof(addr); |
| 808 | int ret; |
| 809 | |
| 810 | QSOCKET_CALL(ret, accept(fd, &addr, &addrlen)); |
| 811 | if (ret < 0) |
| 812 | return _fix_errno(); |
| 813 | |
| 814 | if (address) { |
| 815 | if (sock_address_from_bsd(address, &addr, addrlen) < 0) { |
| 816 | socket_close(ret); |
| 817 | return -1; |
| 818 | } |
| 819 | } |
| 820 | return ret; |
| 821 | } |
| 822 | |
| 823 | SocketType socket_get_type(int fd) |
| 824 | { |
| 825 | int opt = -1; |
| 826 | int optlen = sizeof(opt); |
| 827 | getsockopt(fd, SOL_SOCKET, SO_TYPE, (void*)&opt, (void*)&optlen ); |
| 828 | |
| 829 | return socket_type_from_bsd(opt); |
| 830 | } |
| 831 | |
| 832 | int socket_set_nonblock(int fd) |
| 833 | { |
| 834 | #ifdef _WIN32 |
| 835 | unsigned long opt = 1; |
| 836 | return ioctlsocket(fd, FIONBIO, &opt); |
| 837 | #else |
| 838 | int flags = fcntl(fd, F_GETFL); |
| 839 | return fcntl(fd, F_SETFL, flags | O_NONBLOCK); |
| 840 | #endif |
| 841 | } |
| 842 | |
| 843 | int socket_set_blocking(int fd) |
| 844 | { |
| 845 | #ifdef _WIN32 |
| 846 | unsigned long opt = 0; |
| 847 | return ioctlsocket(fd, FIONBIO, &opt); |
| 848 | #else |
| 849 | int flags = fcntl(fd, F_GETFL); |
| 850 | return fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); |
| 851 | #endif |
| 852 | } |
| 853 | |
| 854 | static int |
| 855 | socket_setoption(int fd, int domain, int option, int _flag) |
| 856 | { |
| 857 | #ifdef _WIN32 |
| 858 | DWORD flag = (DWORD) _flag; |
| 859 | #else |
| 860 | int flag = _flag; |
| 861 | #endif |
| 862 | return setsockopt( fd, domain, option, (const char*)&flag, sizeof(flag) ); |
| 863 | } |
| 864 | |
| 865 | |
| 866 | int socket_set_xreuseaddr(int fd) |
| 867 | { |
| 868 | #ifdef _WIN32 |
| 869 | /* on Windows, SO_REUSEADDR is used to indicate that several programs can |
| 870 | * bind to the same port. this is completely different from the Unix |
| 871 | * semantics. instead of SO_EXCLUSIVEADDR to ensure that explicitely prevent |
| 872 | * this. |
| 873 | */ |
| 874 | return socket_setoption(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, 1); |
| 875 | #else |
| 876 | return socket_setoption(fd, SOL_SOCKET, SO_REUSEADDR, 1); |
| 877 | #endif |
| 878 | } |
| 879 | |
| 880 | |
| 881 | int socket_set_oobinline(int fd) |
| 882 | { |
| 883 | return socket_setoption(fd, SOL_SOCKET, SO_OOBINLINE, 1); |
| 884 | } |
| 885 | |
| 886 | |
| 887 | int socket_set_nodelay(int fd) |
| 888 | { |
| 889 | return socket_setoption(fd, IPPROTO_TCP, TCP_NODELAY, 1); |
| 890 | } |
| 891 | |
| 892 | |
| 893 | #ifdef _WIN32 |
| 894 | #include <stdlib.h> |
| 895 | |
| 896 | static void socket_cleanup(void) |
| 897 | { |
| 898 | WSACleanup(); |
| 899 | } |
| 900 | |
| 901 | int socket_init(void) |
| 902 | { |
| 903 | WSADATA Data; |
| 904 | int ret, err; |
| 905 | |
| 906 | ret = WSAStartup(MAKEWORD(2,2), &Data); |
| 907 | if (ret != 0) { |
| 908 | err = WSAGetLastError(); |
| 909 | return -1; |
| 910 | } |
| 911 | atexit(socket_cleanup); |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | #else /* !_WIN32 */ |
| 916 | |
| 917 | int socket_init(void) |
| 918 | { |
| 919 | return 0; /* nothing to do on Unix */ |
| 920 | } |
| 921 | |
| 922 | #endif /* !_WIN32 */ |
| 923 | |
| 924 | #ifdef _WIN32 |
| 925 | |
| 926 | static void |
| 927 | socket_close_handler( void* _fd ) |
| 928 | { |
| 929 | int fd = (int)_fd; |
| 930 | int ret; |
| 931 | char buff[64]; |
| 932 | |
| 933 | /* we want to drain the read side of the socket before closing it */ |
| 934 | do { |
| 935 | ret = recv( fd, buff, sizeof(buff), 0 ); |
| 936 | } while (ret < 0 && WSAGetLastError() == WSAEINTR); |
| 937 | |
| 938 | if (ret < 0 && WSAGetLastError() == EWOULDBLOCK) |
| 939 | return; |
| 940 | |
| 941 | qemu_set_fd_handler( fd, NULL, NULL, NULL ); |
| 942 | closesocket( fd ); |
| 943 | } |
| 944 | |
| 945 | void |
| 946 | socket_close( int fd ) |
| 947 | { |
| 948 | int old_errno = errno; |
| 949 | |
| 950 | shutdown( fd, SD_BOTH ); |
| 951 | /* we want to drain the socket before closing it */ |
| 952 | qemu_set_fd_handler( fd, socket_close_handler, NULL, (void*)fd ); |
| 953 | |
| 954 | errno = old_errno; |
| 955 | } |
| 956 | |
| 957 | #else /* !_WIN32 */ |
| 958 | |
| 959 | #include <unistd.h> |
| 960 | |
| 961 | void |
| 962 | socket_close( int fd ) |
| 963 | { |
| 964 | int old_errno = errno; |
| 965 | |
| 966 | shutdown( fd, SHUT_RDWR ); |
| 967 | close( fd ); |
| 968 | |
| 969 | errno = old_errno; |
| 970 | } |
| 971 | |
| 972 | #endif /* !_WIN32 */ |
| 973 | |
| 974 | |
| 975 | static int |
| 976 | socket_bind_server( int s, const SockAddress* to, SocketType type ) |
| 977 | { |
| 978 | socket_set_xreuseaddr(s); |
| 979 | |
| 980 | if (socket_bind(s, to) < 0) { |
| 981 | dprint("could not bind server socket address %s: %s", |
| 982 | sock_address_to_string(to), errno_str); |
| 983 | goto FAIL; |
| 984 | } |
| 985 | |
| 986 | if (type == SOCKET_STREAM) { |
| 987 | if (socket_listen(s, 4) < 0) { |
| 988 | dprint("could not listen server socket %s: %s", |
| 989 | sock_address_to_string(to), errno_str); |
| 990 | goto FAIL; |
| 991 | } |
| 992 | } |
| 993 | return s; |
| 994 | |
| 995 | FAIL: |
| 996 | socket_close(s); |
| 997 | return -1; |
| 998 | } |
| 999 | |
| 1000 | |
| 1001 | static int |
| 1002 | socket_connect_client( int s, const SockAddress* to ) |
| 1003 | { |
| 1004 | if (socket_connect(s, to) < 0) { |
| 1005 | dprint( "could not connect client socket to %s: %s\n", |
| 1006 | sock_address_to_string(to), errno_str ); |
| 1007 | socket_close(s); |
| 1008 | return -1; |
| 1009 | } |
| 1010 | |
| 1011 | socket_set_nonblock( s ); |
| 1012 | return s; |
| 1013 | } |
| 1014 | |
| 1015 | |
| 1016 | static int |
| 1017 | socket_in_server( int address, int port, SocketType type ) |
| 1018 | { |
| 1019 | SockAddress addr; |
| 1020 | int s; |
| 1021 | |
| 1022 | sock_address_init_inet( &addr, address, port ); |
| 1023 | s = socket_create_inet( type ); |
| 1024 | if (s < 0) |
| 1025 | return -1; |
| 1026 | |
| 1027 | return socket_bind_server( s, &addr, type ); |
| 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | static int |
| 1032 | socket_in_client( SockAddress* to, SocketType type ) |
| 1033 | { |
| 1034 | int s; |
| 1035 | |
| 1036 | s = socket_create_inet( type ); |
| 1037 | if (s < 0) return -1; |
| 1038 | |
| 1039 | return socket_connect_client( s, to ); |
| 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | int |
| 1044 | socket_loopback_server( int port, SocketType type ) |
| 1045 | { |
| 1046 | return socket_in_server( SOCK_ADDRESS_INET_LOOPBACK, port, type ); |
| 1047 | } |
| 1048 | |
| 1049 | int |
| 1050 | socket_loopback_client( int port, SocketType type ) |
| 1051 | { |
| 1052 | SockAddress addr; |
| 1053 | |
| 1054 | sock_address_init_inet( &addr, SOCK_ADDRESS_INET_LOOPBACK, port ); |
| 1055 | return socket_in_client( &addr, type ); |
| 1056 | } |
| 1057 | |
| 1058 | |
| 1059 | int |
| 1060 | socket_network_client( const char* host, int port, SocketType type ) |
| 1061 | { |
| 1062 | SockAddress addr; |
| 1063 | |
| 1064 | if (sock_address_init_resolve( &addr, host, port, 0) < 0) |
| 1065 | return -1; |
| 1066 | |
| 1067 | return socket_in_client( &addr, type ); |
| 1068 | } |
| 1069 | |
| 1070 | |
| 1071 | int |
| 1072 | socket_anyaddr_server( int port, SocketType type ) |
| 1073 | { |
| 1074 | return socket_in_server( SOCK_ADDRESS_INET_ANY, port, type ); |
| 1075 | } |
| 1076 | |
| 1077 | int |
| 1078 | socket_accept_any( int server_fd ) |
| 1079 | { |
| 1080 | int fd; |
| 1081 | |
| 1082 | QSOCKET_CALL(fd, accept( server_fd, NULL, 0 )); |
| 1083 | if (fd < 0) { |
| 1084 | dprint( "could not accept client connection from fd %d: %s", |
| 1085 | server_fd, errno_str ); |
| 1086 | return -1; |
| 1087 | } |
| 1088 | |
| 1089 | /* set to non-blocking */ |
| 1090 | socket_set_nonblock( fd ); |
| 1091 | return fd; |
| 1092 | } |
| 1093 | |
| 1094 | |
| 1095 | #if HAVE_UNIX_SOCKETS |
| 1096 | |
| 1097 | int |
| 1098 | socket_unix_server( const char* name, SocketType type ) |
| 1099 | { |
| 1100 | SockAddress addr; |
| 1101 | int s, ret; |
| 1102 | |
| 1103 | s = socket_create_unix( type ); |
| 1104 | if (s < 0) |
| 1105 | return -1; |
| 1106 | |
| 1107 | sock_address_init_unix( &addr, name ); |
| 1108 | |
| 1109 | do { |
| 1110 | ret = unlink( name ); |
| 1111 | } while (ret < 0 && errno == EINTR); |
| 1112 | |
| 1113 | ret = socket_bind_server( s, &addr, type ); |
| 1114 | |
| 1115 | sock_address_done( &addr ); |
| 1116 | return ret; |
| 1117 | } |
| 1118 | |
| 1119 | int |
| 1120 | socket_unix_client( const char* name, SocketType type ) |
| 1121 | { |
| 1122 | SockAddress addr; |
| 1123 | int s, ret; |
| 1124 | |
| 1125 | s = socket_create_unix(type); |
| 1126 | if (s < 0) |
| 1127 | return -1; |
| 1128 | |
| 1129 | sock_address_init_unix( &addr, name ); |
| 1130 | |
| 1131 | ret = socket_connect_client( s, &addr ); |
| 1132 | |
| 1133 | sock_address_done( &addr ); |
| 1134 | return ret; |
| 1135 | } |
| 1136 | |
| 1137 | #endif /* HAVE_UNIX_SOCKETS */ |
| 1138 | |
| 1139 | |
| 1140 | |
| 1141 | int |
| 1142 | socket_pair(int *fd1, int *fd2) |
| 1143 | { |
| 1144 | #ifndef _WIN32 |
| 1145 | int fds[2]; |
| 1146 | int ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds); |
| 1147 | |
| 1148 | if (!ret) { |
| 1149 | socket_set_nonblock(fds[0]); |
| 1150 | socket_set_nonblock(fds[1]); |
| 1151 | *fd1 = fds[0]; |
| 1152 | *fd2 = fds[1]; |
| 1153 | } |
| 1154 | return ret; |
| 1155 | #else /* _WIN32 */ |
| 1156 | /* on Windows, select() only works with network sockets, which |
| 1157 | * means we absolutely cannot use Win32 PIPEs to implement |
| 1158 | * socket pairs with the current event loop implementation. |
| 1159 | * We're going to do like Cygwin: create a random pair |
| 1160 | * of localhost TCP sockets and connect them together |
| 1161 | */ |
| 1162 | int s0, s1, s2, port; |
| 1163 | struct sockaddr_in sockin; |
| 1164 | socklen_t len; |
| 1165 | |
| 1166 | /* first, create the 'server' socket. |
| 1167 | * a port number of 0 means 'any port between 1024 and 5000. |
| 1168 | * see Winsock bind() documentation for details */ |
| 1169 | s0 = socket_loopback_server( 0, SOCK_STREAM ); |
| 1170 | if (s0 < 0) |
| 1171 | return -1; |
| 1172 | |
| 1173 | /* now connect a client socket to it, we first need to |
| 1174 | * extract the server socket's port number */ |
| 1175 | len = sizeof sockin; |
| 1176 | if (getsockname(s0, (struct sockaddr*) &sockin, &len) < 0) { |
| 1177 | closesocket (s0); |
| 1178 | return -1; |
| 1179 | } |
| 1180 | |
| 1181 | port = ntohs(sockin.sin_port); |
| 1182 | s2 = socket_loopback_client( port, SOCK_STREAM ); |
| 1183 | if (s2 < 0) { |
| 1184 | closesocket(s0); |
| 1185 | return -1; |
| 1186 | } |
| 1187 | |
| 1188 | /* we need to accept the connection on the server socket |
| 1189 | * this will create the second socket for the pair |
| 1190 | */ |
| 1191 | len = sizeof sockin; |
| 1192 | s1 = accept(s0, (struct sockaddr*) &sockin, &len); |
| 1193 | if (s1 == INVALID_SOCKET) { |
| 1194 | closesocket (s0); |
| 1195 | closesocket (s2); |
| 1196 | return -1; |
| 1197 | } |
| 1198 | socket_set_nonblock(s1); |
| 1199 | |
| 1200 | /* close server socket */ |
| 1201 | closesocket(s0); |
| 1202 | *fd1 = s1; |
| 1203 | *fd2 = s2; |
| 1204 | return 0; |
| 1205 | #endif /* _WIN32 */ |
| 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | |
| 1210 | int |
| 1211 | socket_mcast_inet_add_membership( int s, uint32_t ip ) |
| 1212 | { |
| 1213 | struct ip_mreq imr; |
| 1214 | |
| 1215 | imr.imr_multiaddr.s_addr = htonl(ip); |
| 1216 | imr.imr_interface.s_addr = htonl(INADDR_ANY); |
| 1217 | |
| 1218 | if ( setsockopt( s, IPPROTO_IP, IP_ADD_MEMBERSHIP, |
| 1219 | (const char *)&imr, |
| 1220 | sizeof(struct ip_mreq)) < 0 ) |
| 1221 | { |
| 1222 | return _fix_errno(); |
| 1223 | } |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | int |
| 1228 | socket_mcast_inet_drop_membership( int s, uint32_t ip ) |
| 1229 | { |
| 1230 | struct ip_mreq imr; |
| 1231 | |
| 1232 | imr.imr_multiaddr.s_addr = htonl(ip); |
| 1233 | imr.imr_interface.s_addr = htonl(INADDR_ANY); |
| 1234 | |
| 1235 | if ( setsockopt( s, IPPROTO_IP, IP_DROP_MEMBERSHIP, |
| 1236 | (const char *)&imr, |
| 1237 | sizeof(struct ip_mreq)) < 0 ) |
| 1238 | { |
| 1239 | return _fix_errno(); |
| 1240 | } |
| 1241 | return 0; |
| 1242 | } |
| 1243 | |
| 1244 | int |
| 1245 | socket_mcast_inet_set_loop( int s, int enabled ) |
| 1246 | { |
| 1247 | return socket_setoption( s, IPPROTO_IP, IP_MULTICAST_LOOP, !!enabled ); |
| 1248 | } |
| 1249 | |
| 1250 | int |
| 1251 | socket_mcast_inet_set_ttl( int s, int ttl ) |
| 1252 | { |
| 1253 | return socket_setoption( s, IPPROTO_IP, IP_MULTICAST_TTL, ttl ); |
| 1254 | } |
| 1255 | |
| 1256 | |
| 1257 | char* |
| 1258 | host_name( void ) |
| 1259 | { |
| 1260 | static char buf[256]; /* 255 is the max host name length supported by DNS */ |
| 1261 | int ret; |
| 1262 | |
| 1263 | QSOCKET_CALL(ret, gethostname(buf, sizeof(buf))); |
| 1264 | |
| 1265 | if (ret < 0) |
| 1266 | return "localhost"; |
| 1267 | else |
| 1268 | return buf; |
| 1269 | } |