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 #ifdef __linux__ /* Recent versions of glibc only define EAI_NODATA, which is an 13 extension to the POSIX standard, if _GNU_SOURCE is defined. */ 14 # define _GNU_SOURCE 1 15 #endif 16 17 #include "sockets.h" 18 #include <fcntl.h> 19 #include <stddef.h> 20 #include "qemu_debug.h" 21 #include "qemu-char.h" 22 #include <stdlib.h> 23 #include <string.h> 24 #include "android/utils/path.h" 25 #include "android/utils/debug.h" 26 #include "android/utils/misc.h" 27 #include "android/utils/system.h" 28 29 #define D(...) VERBOSE_PRINT(socket,__VA_ARGS__) 30 31 #ifdef _WIN32 32 # define xxWIN32_LEAN_AND_MEAN 33 # include <windows.h> 34 # include <winsock2.h> 35 # include <ws2tcpip.h> 36 #else /* !_WIN32 */ 37 # include <sys/ioctl.h> 38 # include <sys/socket.h> 39 # include <netinet/in.h> 40 # include <netinet/tcp.h> 41 # include <netdb.h> 42 # if HAVE_UNIX_SOCKETS 43 # include <sys/un.h> 44 # ifndef UNIX_PATH_MAX 45 # define UNIX_PATH_MAX (sizeof(((struct sockaddr_un*)0)->sun_path)-1) 46 # endif 47 # endif 48 #endif /* !_WIN32 */ 49 50 51 52 /* QSOCKET_CALL is used to deal with the fact that EINTR happens pretty 53 * easily in QEMU since we use SIGALRM to implement periodic timers 54 */ 55 #ifdef _WIN32 56 # define QSOCKET_CALL(_ret,_cmd) \ 57 do { _ret = (_cmd); } while ( _ret < 0 && WSAGetLastError() == WSAEINTR ) 58 #else 59 # define QSOCKET_CALL(_ret,_cmd) \ 60 do { \ 61 errno = 0; \ 62 do { _ret = (_cmd); } while ( _ret < 0 && errno == EINTR ); \ 63 } while (0); 64 #endif 65 66 #ifdef _WIN32 67 68 #include <errno.h> 69 70 static int winsock_error; 71 72 #define WINSOCK_ERRORS_LIST \ 73 EE(WSA_INVALID_HANDLE,EINVAL,"invalid handle") \ 74 EE(WSA_NOT_ENOUGH_MEMORY,ENOMEM,"not enough memory") \ 75 EE(WSA_INVALID_PARAMETER,EINVAL,"invalid parameter") \ 76 EE(WSAEINTR,EINTR,"interrupted function call") \ 77 EE(WSAEALREADY,EALREADY,"operation already in progress") \ 78 EE(WSAEBADF,EBADF,"bad file descriptor") \ 79 EE(WSAEACCES,EACCES,"permission denied") \ 80 EE(WSAEFAULT,EFAULT,"bad address") \ 81 EE(WSAEINVAL,EINVAL,"invalid argument") \ 82 EE(WSAEMFILE,EMFILE,"too many opened files") \ 83 EE(WSAEWOULDBLOCK,EWOULDBLOCK,"resource temporarily unavailable") \ 84 EE(WSAEINPROGRESS,EINPROGRESS,"operation now in progress") \ 85 EE(WSAEALREADY,EAGAIN,"operation already in progress") \ 86 EE(WSAENOTSOCK,EBADF,"socket operation not on socket") \ 87 EE(WSAEDESTADDRREQ,EDESTADDRREQ,"destination address required") \ 88 EE(WSAEMSGSIZE,EMSGSIZE,"message too long") \ 89 EE(WSAEPROTOTYPE,EPROTOTYPE,"wrong protocol type for socket") \ 90 EE(WSAENOPROTOOPT,ENOPROTOOPT,"bad protocol option") \ 91 EE(WSAEADDRINUSE,EADDRINUSE,"address already in use") \ 92 EE(WSAEADDRNOTAVAIL,EADDRNOTAVAIL,"cannot assign requested address") \ 93 EE(WSAENETDOWN,ENETDOWN,"network is down") \ 94 EE(WSAENETUNREACH,ENETUNREACH,"network unreachable") \ 95 EE(WSAENETRESET,ENETRESET,"network dropped connection on reset") \ 96 EE(WSAECONNABORTED,ECONNABORTED,"software caused connection abort") \ 97 EE(WSAECONNRESET,ECONNRESET,"connection reset by peer") \ 98 EE(WSAENOBUFS,ENOBUFS,"no buffer space available") \ 99 EE(WSAEISCONN,EISCONN,"socket is already connected") \ 100 EE(WSAENOTCONN,ENOTCONN,"socket is not connected") \ 101 EE(WSAESHUTDOWN,ESHUTDOWN,"cannot send after socket shutdown") \ 102 EE(WSAETOOMANYREFS,ETOOMANYREFS,"too many references") \ 103 EE(WSAETIMEDOUT,ETIMEDOUT,"connection timed out") \ 104 EE(WSAECONNREFUSED,ECONNREFUSED,"connection refused") \ 105 EE(WSAELOOP,ELOOP,"cannot translate name") \ 106 EE(WSAENAMETOOLONG,ENAMETOOLONG,"name too long") \ 107 EE(WSAEHOSTDOWN,EHOSTDOWN,"host is down") \ 108 EE(WSAEHOSTUNREACH,EHOSTUNREACH,"no route to host") \ 109 110 typedef struct { 111 int winsock; 112 int unix; 113 const char* string; 114 } WinsockError; 115 116 static const WinsockError _winsock_errors[] = { 117 #define EE(w,u,s) { w, u, s }, 118 WINSOCK_ERRORS_LIST 119 #undef EE 120 { -1, -1, NULL } 121 }; 122 123 /* this function reads the latest winsock error code and updates 124 * errno to a matching value. It also returns the new value of 125 * errno. 126 */ 127 static int 128 _fix_errno( void ) 129 { 130 const WinsockError* werr = _winsock_errors; 131 int unix = EINVAL; /* generic error code */ 132 133 winsock_error = WSAGetLastError(); 134 135 for ( ; werr->string != NULL; werr++ ) { 136 if (werr->winsock == winsock_error) { 137 unix = werr->unix; 138 break; 139 } 140 } 141 errno = unix; 142 return -1; 143 } 144 145 static int 146 _set_errno( int code ) 147 { 148 winsock_error = -1; 149 errno = code; 150 return -1; 151 } 152 153 /* this function returns a string describing the latest Winsock error */ 154 const char* 155 _errno_str(void) 156 { 157 const WinsockError* werr = _winsock_errors; 158 const char* result = NULL; 159 160 for ( ; werr->string; werr++ ) { 161 if (werr->winsock == winsock_error) { 162 result = werr->string; 163 break; 164 } 165 } 166 167 if (result == NULL) { 168 result = tempstr_format( 169 "Unkown socket error (Winsock=0x%08x) errno=%d: %s", 170 winsock_error, errno, strerror(errno)); 171 } 172 return result; 173 } 174 #else 175 static int 176 _fix_errno( void ) 177 { 178 return -1; 179 } 180 181 static int 182 _set_errno( int code ) 183 { 184 errno = code; 185 return -1; 186 } 187 #endif 188 189 /* socket types */ 190 191 static int 192 socket_family_to_bsd( SocketFamily family ) 193 { 194 switch (family) { 195 case SOCKET_INET: return AF_INET; 196 case SOCKET_IN6: return AF_INET6; 197 #if HAVE_UNIX_SOCKETS 198 case SOCKET_UNIX: return AF_LOCAL; 199 #endif 200 default: return -1; 201 } 202 } 203 204 static int 205 socket_type_to_bsd( SocketType type ) 206 { 207 switch (type) { 208 case SOCKET_DGRAM: return SOCK_DGRAM; 209 case SOCKET_STREAM: return SOCK_STREAM; 210 default: return 0; 211 } 212 } 213 214 static SocketType 215 socket_type_from_bsd( int type ) 216 { 217 switch (type) { 218 case SOCK_DGRAM: return SOCKET_DGRAM; 219 case SOCK_STREAM: return SOCKET_STREAM; 220 default: return (SocketType) SOCKET_UNSPEC; 221 } 222 } 223 224 #if 0 225 static int 226 socket_type_check( SocketType type ) 227 { 228 return (type == SOCKET_DGRAM || type == SOCKET_STREAM); 229 } 230 #endif 231 232 typedef union { 233 struct sockaddr sa[1]; 234 struct sockaddr_in in[1]; 235 #if HAVE_IN6_SOCKETS 236 struct sockaddr_in6 in6[1]; 237 #endif 238 #if HAVE_UNIX_SOCKETS 239 struct sockaddr_un un[1]; 240 #endif 241 } sockaddr_storage; 242 243 /* socket addresses */ 244 245 void 246 sock_address_init_inet( SockAddress* a, uint32_t ip, uint16_t port ) 247 { 248 a->family = SOCKET_INET; 249 a->u.inet.port = port; 250 a->u.inet.address = ip; 251 } 252 253 void 254 sock_address_init_in6 ( SockAddress* a, const uint8_t* ip6[16], uint16_t port ) 255 { 256 a->family = SOCKET_IN6; 257 a->u.in6.port = port; 258 memcpy( a->u.in6.address, ip6, sizeof(a->u.in6.address) ); 259 } 260 261 void 262 sock_address_init_unix( SockAddress* a, const char* path ) 263 { 264 a->family = SOCKET_UNIX; 265 a->u._unix.path = strdup(path ? path : ""); 266 a->u._unix.owner = 1; 267 } 268 269 void sock_address_done( SockAddress* a ) 270 { 271 if (a->family == SOCKET_UNIX && a->u._unix.owner) { 272 a->u._unix.owner = 0; 273 free((char*)a->u._unix.path); 274 } 275 } 276 277 static char* 278 format_char( char* buf, char* end, int c ) 279 { 280 if (buf < end) { 281 if (buf+1 == end) { 282 *buf++ = 0; 283 } else { 284 *buf++ = (char) c; 285 *buf = 0; 286 } 287 } 288 return buf; 289 } 290 291 static char* 292 format_str( char* buf, char* end, const char* str ) 293 { 294 int len = strlen(str); 295 int avail = end - buf; 296 297 if (len > avail) 298 len = avail; 299 300 memcpy( buf, str, len ); 301 buf += len; 302 303 if (buf == end) 304 buf[-1] = 0; 305 else 306 buf[0] = 0; 307 308 return buf; 309 } 310 311 static char* 312 format_unsigned( char* buf, char* end, unsigned val ) 313 { 314 char temp[16]; 315 int nn; 316 317 for ( nn = 0; val != 0; nn++ ) { 318 int rem = val % 10; 319 temp[nn] = '0'+rem; 320 val /= 10; 321 } 322 323 if (nn == 0) 324 temp[nn++] = '0'; 325 326 while (nn > 0) 327 buf = format_char(buf, end, temp[--nn]); 328 329 return buf; 330 } 331 332 static char* 333 format_hex( char* buf, char* end, unsigned val, int ndigits ) 334 { 335 int shift = 4*ndigits; 336 static const char hex[16] = "0123456789abcdef"; 337 338 while (shift >= 0) { 339 buf = format_char(buf, end, hex[(val >> shift) & 15]); 340 shift -= 4; 341 } 342 return buf; 343 } 344 345 static char* 346 format_ip4( char* buf, char* end, uint32_t ip ) 347 { 348 buf = format_unsigned( buf, end, (unsigned)(ip >> 24) ); 349 buf = format_char( buf, end, '.'); 350 buf = format_unsigned( buf, end, (unsigned)((ip >> 16) & 255)); 351 buf = format_char( buf, end, '.'); 352 buf = format_unsigned( buf, end, (unsigned)((ip >> 8) & 255)); 353 buf = format_char( buf, end, '.'); 354 buf = format_unsigned( buf, end, (unsigned)(ip & 255)); 355 return buf; 356 } 357 358 static char* 359 format_ip6( char* buf, char* end, const uint8_t* ip6 ) 360 { 361 int nn; 362 for (nn = 0; nn < 8; nn++) { 363 int val = (ip6[0] << 16) | ip6[1]; 364 ip6 += 2; 365 if (nn > 0) 366 buf = format_char(buf, end, ':'); 367 if (val == 0) 368 continue; 369 buf = format_hex(buf, end, val, 4); 370 } 371 return buf; 372 } 373 374 const char* 375 sock_address_to_string( const SockAddress* a ) 376 { 377 static char buf0[MAX_PATH]; 378 char *buf = buf0, *end = buf + sizeof(buf0); 379 380 switch (a->family) { 381 case SOCKET_INET: 382 buf = format_ip4( buf, end, a->u.inet.address ); 383 buf = format_char( buf, end, ':' ); 384 buf = format_unsigned( buf, end, (unsigned) a->u.inet.port ); 385 break; 386 387 case SOCKET_IN6: 388 buf = format_ip6( buf, end, a->u.in6.address ); 389 buf = format_char( buf, end, ':' ); 390 buf = format_unsigned( buf, end, (unsigned) a->u.in6.port ); 391 break; 392 393 case SOCKET_UNIX: 394 buf = format_str( buf, end, a->u._unix.path ); 395 break; 396 397 default: 398 return NULL; 399 } 400 401 return buf0; 402 } 403 404 int 405 sock_address_equal( const SockAddress* a, const SockAddress* b ) 406 { 407 if (a->family != b->family) 408 return 0; 409 410 switch (a->family) { 411 case SOCKET_INET: 412 return (a->u.inet.address == b->u.inet.address && 413 a->u.inet.port == b->u.inet.port); 414 415 case SOCKET_IN6: 416 return (!memcmp(a->u.in6.address, b->u.in6.address, 16) && 417 a->u.in6.port == b->u.in6.port); 418 419 case SOCKET_UNIX: 420 return (!strcmp(a->u._unix.path, b->u._unix.path)); 421 422 default: 423 return 0; 424 } 425 } 426 427 int 428 sock_address_get_port( const SockAddress* a ) 429 { 430 switch (a->family) { 431 case SOCKET_INET: 432 return a->u.inet.port; 433 case SOCKET_IN6: 434 return a->u.in6.port; 435 default: 436 return -1; 437 } 438 } 439 440 void 441 sock_address_set_port( SockAddress* a, uint16_t port ) 442 { 443 switch (a->family) { 444 case SOCKET_INET: 445 a->u.inet.port = port; 446 break; 447 case SOCKET_IN6: 448 a->u.in6.port = port; 449 break; 450 default: 451 ; 452 } 453 } 454 455 const char* 456 sock_address_get_path( const SockAddress* a ) 457 { 458 if (a->family == SOCKET_UNIX) 459 return a->u._unix.path; 460 else 461 return NULL; 462 } 463 464 int 465 sock_address_get_ip( const SockAddress* a ) 466 { 467 if (a->family == SOCKET_INET) 468 return a->u.inet.address; 469 470 return -1; 471 } 472 473 #if 0 474 char* 475 bufprint_sock_address( char* p, char* end, const SockAddress* a ) 476 { 477 switch (a->family) { 478 case SOCKET_INET: 479 { 480 uint32_t ip = a->u.inet.address; 481 482 return bufprint( p, end, "%d.%d.%d.%d:%d", 483 (ip >> 24) & 255, (ip >> 16) & 255, 484 (ip >> 8) & 255, ip & 255, 485 a->u.inet.port ); 486 } 487 case SOCKET_IN6: 488 { 489 int nn = 0; 490 const char* column = ""; 491 const uint8_t* tab = a->u.in6.address; 492 for (nn = 0; nn < 16; nn += 2) { 493 p = bufprint(p, end, "%s%04x", column, (tab[n] << 8) | tab[n+1]); 494 column = ":"; 495 } 496 return bufprint(p, end, ":%d", a->u.in6.port); 497 } 498 case SOCKET_UNIX: 499 { 500 return bufprint(p, end, "%s", a->u._unix.path); 501 } 502 default: 503 return p; 504 } 505 } 506 #endif 507 508 static int 509 sock_address_to_bsd( const SockAddress* a, sockaddr_storage* paddress, socklen_t *psize ) 510 { 511 switch (a->family) { 512 case SOCKET_INET: 513 { 514 struct sockaddr_in* dst = paddress->in; 515 516 *psize = sizeof(*dst); 517 518 memset( paddress, 0, *psize ); 519 520 dst->sin_family = AF_INET; 521 dst->sin_port = htons(a->u.inet.port); 522 dst->sin_addr.s_addr = htonl(a->u.inet.address); 523 } 524 break; 525 526 #if HAVE_IN6_SOCKETS 527 case SOCKET_IN6: 528 { 529 struct sockaddr_in6* dst = paddress->in6; 530 531 *psize = sizeof(*dst); 532 533 memset( paddress, 0, *psize ); 534 535 dst->sin6_family = AF_INET6; 536 dst->sin6_port = htons(a->u.in6.port); 537 memcpy( dst->sin6_addr.s6_addr, a->u.in6.address, 16 ); 538 } 539 break; 540 #endif /* HAVE_IN6_SOCKETS */ 541 542 #if HAVE_UNIX_SOCKETS 543 case SOCKET_UNIX: 544 { 545 int slen = strlen(a->u._unix.path); 546 struct sockaddr_un* dst = paddress->un; 547 548 if (slen >= UNIX_PATH_MAX) 549 return -1; 550 551 memset( dst, 0, sizeof(*dst) ); 552 553 dst->sun_family = AF_LOCAL; 554 memcpy( dst->sun_path, a->u._unix.path, slen ); 555 dst->sun_path[slen] = 0; 556 557 *psize = (char*)&dst->sun_path[slen+1] - (char*)dst; 558 } 559 break; 560 #endif /* HAVE_UNIX_SOCKETS */ 561 562 default: 563 return _set_errno(EINVAL); 564 } 565 566 return 0; 567 } 568 569 static int 570 sock_address_from_bsd( SockAddress* a, const void* from, size_t fromlen ) 571 { 572 switch (((struct sockaddr *)from)->sa_family) { 573 case AF_INET: 574 { 575 const struct sockaddr_in* src = from; 576 577 if (fromlen < sizeof(*src)) 578 return _set_errno(EINVAL); 579 580 a->family = SOCKET_INET; 581 a->u.inet.port = ntohs(src->sin_port); 582 a->u.inet.address = ntohl(src->sin_addr.s_addr); 583 } 584 break; 585 586 #ifdef HAVE_IN6_SOCKETS 587 case AF_INET6: 588 { 589 const struct sockaddr_in6* src = from; 590 591 if (fromlen < sizeof(*src)) 592 return _set_errno(EINVAL); 593 594 a->family = SOCKET_IN6; 595 a->u.in6.port = ntohs(src->sin6_port); 596 memcpy(a->u.in6.address, src->sin6_addr.s6_addr, 16); 597 } 598 break; 599 #endif 600 601 #ifdef HAVE_UNIX_SOCKETS 602 case AF_LOCAL: 603 { 604 const struct sockaddr_un* src = from; 605 char* end; 606 607 if (fromlen < sizeof(*src)) 608 return _set_errno(EINVAL); 609 610 /* check that the path is zero-terminated */ 611 end = memchr(src->sun_path, 0, UNIX_PATH_MAX); 612 if (end == NULL) 613 return _set_errno(EINVAL); 614 615 a->family = SOCKET_UNIX; 616 a->u._unix.owner = 1; 617 a->u._unix.path = strdup(src->sun_path); 618 } 619 break; 620 #endif 621 622 default: 623 return _set_errno(EINVAL); 624 } 625 return 0; 626 } 627 628 629 int 630 sock_address_init_resolve( SockAddress* a, const char* hostname, uint16_t port, int preferIn6 ) 631 { 632 struct addrinfo hints[1]; 633 struct addrinfo* res; 634 int ret; 635 636 memset(hints, 0, sizeof(hints)); 637 hints->ai_family = preferIn6 ? AF_INET6 : AF_UNSPEC; 638 639 ret = getaddrinfo(hostname, NULL, hints, &res); 640 if (ret != 0) { 641 int err; 642 643 switch (ret) { 644 case EAI_AGAIN: /* server is down */ 645 case EAI_FAIL: /* server is sick */ 646 err = EHOSTDOWN; 647 break; 648 649 #ifdef EAI_NODATA 650 case EAI_NODATA: 651 #endif 652 case EAI_NONAME: 653 err = ENOENT; 654 break; 655 656 case EAI_MEMORY: 657 err = ENOMEM; 658 break; 659 660 default: 661 err = EINVAL; 662 } 663 return _set_errno(err); 664 } 665 666 /* Parse the returned list of addresses. */ 667 { 668 struct addrinfo* res_ipv4 = NULL; 669 struct addrinfo* res_ipv6 = NULL; 670 struct addrinfo* r; 671 672 /* If preferIn6 is false, we stop on the first IPv4 address, 673 * otherwise, we stop on the first IPv6 one 674 */ 675 for (r = res; r != NULL; r = r->ai_next) { 676 if (r->ai_family == AF_INET && res_ipv4 == NULL) { 677 res_ipv4 = r; 678 if (!preferIn6) 679 break; 680 } 681 else if (r->ai_family == AF_INET6 && res_ipv6 == NULL) { 682 res_ipv6 = r; 683 if (preferIn6) 684 break; 685 } 686 } 687 688 /* Select the best address in 'r', which will be NULL 689 * if there is no corresponding address. 690 */ 691 if (preferIn6) { 692 r = res_ipv6; 693 if (r == NULL) 694 r = res_ipv4; 695 } else { 696 r = res_ipv4; 697 if (r == NULL) 698 r = res_ipv6; 699 } 700 701 if (r == NULL) { 702 ret = _set_errno(ENOENT); 703 goto Exit; 704 } 705 706 /* Convert to a SockAddress */ 707 ret = sock_address_from_bsd( a, r->ai_addr, r->ai_addrlen ); 708 if (ret < 0) 709 goto Exit; 710 } 711 712 /* need to set the port */ 713 switch (a->family) { 714 case SOCKET_INET: a->u.inet.port = port; break; 715 case SOCKET_IN6: a->u.in6.port = port; break; 716 default: ; 717 } 718 719 Exit: 720 freeaddrinfo(res); 721 return ret; 722 } 723 724 /* The Winsock headers for mingw lack some definitions */ 725 #ifndef AI_ADDRCONFIG 726 # define AI_ADDRCONFIG 0 727 #endif 728 729 SockAddress** 730 sock_address_list_create( const char* hostname, 731 const char* port, 732 unsigned flags ) 733 { 734 SockAddress** list = NULL; 735 SockAddress* addr; 736 int nn, count, ret; 737 struct addrinfo ai, *res, *e; 738 739 memset(&ai, 0, sizeof(ai)); 740 ai.ai_flags |= AI_ADDRCONFIG; 741 ai.ai_family = PF_UNSPEC; 742 743 if (flags & SOCKET_LIST_FORCE_INET) 744 ai.ai_family = PF_INET; 745 else if (flags & SOCKET_LIST_FORCE_IN6) 746 ai.ai_family = PF_INET6; 747 748 if (flags & SOCKET_LIST_PASSIVE) 749 ai.ai_flags |= AI_PASSIVE; 750 else 751 ai.ai_flags |= AI_CANONNAME; 752 753 if (flags & SOCKET_LIST_DGRAM) 754 ai.ai_socktype = SOCK_DGRAM; 755 756 while (1) { 757 struct addrinfo hints = ai; 758 759 ret = getaddrinfo(hostname, port, &hints, &res); 760 if (ret == 0) 761 break; 762 763 switch (ret) { 764 #ifdef EAI_ADDRFAMILY 765 case EAI_ADDRFAMILY: 766 #endif 767 case EAI_NODATA: 768 _set_errno(ENOENT); 769 break; 770 case EAI_FAMILY: 771 _set_errno(EAFNOSUPPORT); 772 break; 773 case EAI_AGAIN: 774 _set_errno(EAGAIN); 775 break; 776 #ifdef EAI_SYSTEM 777 case EAI_SYSTEM: 778 if (errno == EINTR) 779 continue; 780 break; 781 #endif 782 default: 783 _set_errno(EINVAL); 784 } 785 return NULL; 786 } 787 788 /* allocate result list */ 789 for (count = 0, e = res; e != NULL; e = e->ai_next) 790 count += 1; 791 792 AARRAY_NEW(list, count+1); 793 AARRAY_NEW(addr, count); 794 795 for (nn = 0, e = res; e != NULL; e = e->ai_next) { 796 797 ret = sock_address_from_bsd(addr, e->ai_addr, e->ai_addrlen); 798 if (ret < 0) 799 continue; 800 801 list[nn++] = addr++; 802 } 803 list[nn] = NULL; 804 freeaddrinfo(res); 805 return list; 806 } 807 808 SockAddress** 809 sock_address_list_create2(const char* host_and_port, unsigned flags ) 810 { 811 char host_name[512]; 812 const char* actual_host_name = "localhost"; 813 // Parse host and port name. 814 const char* port_name = strchr(host_and_port, ':'); 815 if (port_name != NULL) { 816 int to_copy = MIN(sizeof(host_name)-1, port_name - host_and_port); 817 if (to_copy != 0) { 818 memcpy(host_name, host_and_port, to_copy); 819 host_name[to_copy] = '\0'; 820 actual_host_name = host_name; 821 port_name++; 822 } else { 823 return NULL; 824 } 825 } else { 826 port_name = host_and_port; 827 } 828 // Make sure that port_name is not empty. 829 if (port_name[0] == '\0') { 830 return NULL; 831 } 832 return sock_address_list_create(actual_host_name, port_name, flags); 833 } 834 835 void 836 sock_address_list_free( SockAddress** list ) 837 { 838 int nn; 839 SockAddress* addr; 840 841 if (list == NULL) 842 return; 843 844 addr = list[0]; 845 for (nn = 0; list[nn] != NULL; nn++) { 846 sock_address_done(list[nn]); 847 list[nn] = NULL; 848 } 849 AFREE(addr); 850 AFREE(list); 851 } 852 853 int 854 sock_address_get_numeric_info( SockAddress* a, 855 char* host, 856 size_t hostlen, 857 char* serv, 858 size_t servlen ) 859 { 860 struct sockaddr* saddr; 861 socklen_t slen; 862 int ret; 863 864 switch (a->family) { 865 case SOCKET_INET: 866 saddr = (struct sockaddr*) &a->u.inet.address; 867 slen = sizeof(a->u.inet.address); 868 break; 869 870 #if HAVE_IN6_SOCKET 871 case SOCKET_IN6: 872 saddr = (struct sockaddr*) &a->u.in6.address; 873 slen = sizeof(a->u.in6.address); 874 break; 875 #endif 876 default: 877 return _set_errno(EINVAL); 878 } 879 880 ret = getnameinfo( saddr, slen, host, hostlen, serv, servlen, 881 NI_NUMERICHOST | NI_NUMERICSERV ); 882 883 switch (ret) { 884 case 0: 885 break; 886 case EAI_AGAIN: 887 ret = EAGAIN; 888 break; 889 default: 890 ret = EINVAL; 891 } 892 return ret; 893 } 894 895 int 896 socket_create( SocketFamily family, SocketType type ) 897 { 898 int ret; 899 int sfamily = socket_family_to_bsd(family); 900 int stype = socket_type_to_bsd(type); 901 902 if (sfamily < 0 || stype < 0) { 903 return _set_errno(EINVAL); 904 } 905 906 QSOCKET_CALL(ret, socket(sfamily, stype, 0)); 907 if (ret < 0) 908 return _fix_errno(); 909 910 return ret; 911 } 912 913 914 int 915 socket_create_inet( SocketType type ) 916 { 917 return socket_create( SOCKET_INET, type ); 918 } 919 920 #if HAVE_IN6_SOCKETS 921 int 922 socket_create_in6 ( SocketType type ) 923 { 924 return socket_create( SOCKET_IN6, type ); 925 } 926 #endif 927 928 #if HAVE_UNIX_SOCKETS 929 int 930 socket_create_unix( SocketType type ) 931 { 932 return socket_create( SOCKET_UNIX, type ); 933 } 934 #endif 935 936 int socket_can_read(int fd) 937 { 938 #ifdef _WIN32 939 unsigned long opt; 940 941 if (ioctlsocket(fd, FIONREAD, &opt) < 0) 942 return 0; 943 944 return opt; 945 #else 946 int opt; 947 948 if (ioctl(fd, FIONREAD, &opt) < 0) 949 return 0; 950 951 return opt; 952 #endif 953 } 954 955 #define SOCKET_CALL(cmd) \ 956 int ret; \ 957 QSOCKET_CALL(ret, (cmd)); \ 958 if (ret < 0) \ 959 return _fix_errno(); \ 960 return ret; \ 961 962 int 963 socket_send(int fd, const void* buf, int buflen) 964 { 965 SOCKET_CALL(send(fd, buf, buflen, 0)) 966 } 967 968 int 969 socket_send_oob( int fd, const void* buf, int buflen ) 970 { 971 SOCKET_CALL(send(fd, buf, buflen, MSG_OOB)); 972 } 973 974 int 975 socket_sendto(int fd, const void* buf, int buflen, const SockAddress* to) 976 { 977 sockaddr_storage sa; 978 socklen_t salen; 979 980 if (sock_address_to_bsd(to, &sa, &salen) < 0) 981 return -1; 982 983 SOCKET_CALL(sendto(fd, buf, buflen, 0, sa.sa, salen)); 984 } 985 986 int 987 socket_recv(int fd, void* buf, int len) 988 { 989 SOCKET_CALL(recv(fd, buf, len, 0)); 990 } 991 992 int 993 socket_recvfrom(int fd, void* buf, int len, SockAddress* from) 994 { 995 sockaddr_storage sa; 996 socklen_t salen = sizeof(sa); 997 int ret; 998 999 QSOCKET_CALL(ret,recvfrom(fd,buf,len,0,sa.sa,&salen)); 1000 if (ret < 0) 1001 return _fix_errno(); 1002 1003 if (sock_address_from_bsd(from, &sa, salen) < 0) 1004 return -1; 1005 1006 return ret; 1007 } 1008 1009 int 1010 socket_connect( int fd, const SockAddress* address ) 1011 { 1012 sockaddr_storage addr; 1013 socklen_t addrlen; 1014 1015 if (sock_address_to_bsd(address, &addr, &addrlen) < 0) 1016 return -1; 1017 1018 SOCKET_CALL(connect(fd,addr.sa,addrlen)); 1019 } 1020 1021 int 1022 socket_bind( int fd, const SockAddress* address ) 1023 { 1024 sockaddr_storage addr; 1025 socklen_t addrlen; 1026 1027 if (sock_address_to_bsd(address, &addr, &addrlen) < 0) 1028 return -1; 1029 1030 SOCKET_CALL(bind(fd, addr.sa, addrlen)); 1031 } 1032 1033 int 1034 socket_get_address( int fd, SockAddress* address ) 1035 { 1036 sockaddr_storage addr; 1037 socklen_t addrlen = sizeof(addr); 1038 int ret; 1039 1040 QSOCKET_CALL(ret, getsockname(fd, addr.sa, &addrlen)); 1041 if (ret < 0) 1042 return _fix_errno(); 1043 1044 return sock_address_from_bsd(address, &addr, addrlen); 1045 } 1046 1047 int 1048 socket_get_peer_address( int fd, SockAddress* address ) 1049 { 1050 sockaddr_storage addr; 1051 socklen_t addrlen = sizeof(addr); 1052 int ret; 1053 1054 QSOCKET_CALL(ret, getpeername(fd, addr.sa, &addrlen)); 1055 if (ret < 0) 1056 return _fix_errno(); 1057 1058 return sock_address_from_bsd(address, &addr, addrlen); 1059 } 1060 1061 int 1062 socket_listen( int fd, int backlog ) 1063 { 1064 SOCKET_CALL(listen(fd, backlog)); 1065 } 1066 1067 int 1068 socket_accept( int fd, SockAddress* address ) 1069 { 1070 sockaddr_storage addr; 1071 socklen_t addrlen = sizeof(addr); 1072 int ret; 1073 1074 QSOCKET_CALL(ret, accept(fd, addr.sa, &addrlen)); 1075 if (ret < 0) 1076 return _fix_errno(); 1077 1078 if (address) { 1079 if (sock_address_from_bsd(address, &addr, addrlen) < 0) { 1080 socket_close(ret); 1081 return -1; 1082 } 1083 } 1084 return ret; 1085 } 1086 1087 static int 1088 socket_getoption(int fd, int domain, int option, int defaut) 1089 { 1090 int ret; 1091 while (1) { 1092 #ifdef _WIN32 1093 DWORD opt = (DWORD)-1; 1094 #else 1095 int opt = -1; 1096 #endif 1097 socklen_t optlen = sizeof(opt); 1098 ret = getsockopt(fd, domain, option, (char*)&opt, &optlen); 1099 if (ret == 0) 1100 return (int)opt; 1101 if (errno != EINTR) 1102 return defaut; 1103 } 1104 #undef OPT_CAST 1105 } 1106 1107 1108 SocketType socket_get_type(int fd) 1109 { 1110 int so_type = socket_getoption(fd, SOL_SOCKET, SO_TYPE, -1); 1111 return socket_type_from_bsd(so_type); 1112 } 1113 1114 int socket_set_nonblock(int fd) 1115 { 1116 #ifdef _WIN32 1117 unsigned long opt = 1; 1118 return ioctlsocket(fd, FIONBIO, &opt); 1119 #else 1120 int flags = fcntl(fd, F_GETFL); 1121 return fcntl(fd, F_SETFL, flags | O_NONBLOCK); 1122 #endif 1123 } 1124 1125 int socket_set_blocking(int fd) 1126 { 1127 #ifdef _WIN32 1128 unsigned long opt = 0; 1129 return ioctlsocket(fd, FIONBIO, &opt); 1130 #else 1131 int flags = fcntl(fd, F_GETFL); 1132 return fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); 1133 #endif 1134 } 1135 1136 static int 1137 socket_setoption(int fd, int domain, int option, int _flag) 1138 { 1139 #ifdef _WIN32 1140 DWORD flag = (DWORD) _flag; 1141 #else 1142 int flag = _flag; 1143 #endif 1144 return setsockopt( fd, domain, option, (const char*)&flag, sizeof(flag) ); 1145 } 1146 1147 int socket_set_xreuseaddr(int fd) 1148 { 1149 #ifdef _WIN32 1150 /* on Windows, SO_REUSEADDR is used to indicate that several programs can 1151 * bind to the same port. this is completely different from the Unix 1152 * semantics. instead of SO_EXCLUSIVEADDR to ensure that explicitely prevent 1153 * this. 1154 */ 1155 return socket_setoption(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, 1); 1156 #else 1157 return socket_setoption(fd, SOL_SOCKET, SO_REUSEADDR, 1); 1158 #endif 1159 } 1160 1161 1162 int socket_set_oobinline(int fd) 1163 { 1164 return socket_setoption(fd, SOL_SOCKET, SO_OOBINLINE, 1); 1165 } 1166 1167 1168 int socket_set_nodelay(int fd) 1169 { 1170 return socket_setoption(fd, IPPROTO_TCP, TCP_NODELAY, 1); 1171 } 1172 1173 int socket_set_ipv6only(int fd) 1174 { 1175 /* IPV6_ONLY is only supported since Vista on Windows, 1176 * and the Mingw headers lack its definition anyway. 1177 */ 1178 #if defined(_WIN32) && !defined(IPV6_V6ONLY) 1179 return 0; 1180 #else 1181 return socket_setoption(fd, IPPROTO_IPV6, IPV6_V6ONLY, 1); 1182 #endif 1183 } 1184 1185 1186 int socket_get_error(int fd) 1187 { 1188 return socket_getoption(fd, SOL_SOCKET, SO_ERROR, -1); 1189 } 1190 1191 #ifdef _WIN32 1192 #include <stdlib.h> 1193 1194 static void socket_cleanup(void) 1195 { 1196 WSACleanup(); 1197 } 1198 1199 int socket_init(void) 1200 { 1201 WSADATA Data; 1202 int ret, err; 1203 1204 ret = WSAStartup(MAKEWORD(2,2), &Data); 1205 if (ret != 0) { 1206 err = WSAGetLastError(); 1207 return -1; 1208 } 1209 atexit(socket_cleanup); 1210 return 0; 1211 } 1212 1213 #else /* !_WIN32 */ 1214 1215 int socket_init(void) 1216 { 1217 return 0; /* nothing to do on Unix */ 1218 } 1219 1220 #endif /* !_WIN32 */ 1221 1222 #ifdef _WIN32 1223 1224 static void 1225 socket_close_handler( void* _fd ) 1226 { 1227 int fd = (int)_fd; 1228 int ret; 1229 char buff[64]; 1230 1231 /* we want to drain the read side of the socket before closing it */ 1232 do { 1233 ret = recv( fd, buff, sizeof(buff), 0 ); 1234 } while (ret < 0 && WSAGetLastError() == WSAEINTR); 1235 1236 if (ret < 0 && WSAGetLastError() == EWOULDBLOCK) 1237 return; 1238 1239 qemu_set_fd_handler( fd, NULL, NULL, NULL ); 1240 closesocket( fd ); 1241 } 1242 1243 void 1244 socket_close( int fd ) 1245 { 1246 int old_errno = errno; 1247 1248 shutdown( fd, SD_BOTH ); 1249 /* we want to drain the socket before closing it */ 1250 qemu_set_fd_handler( fd, socket_close_handler, NULL, (void*)fd ); 1251 1252 errno = old_errno; 1253 } 1254 1255 #else /* !_WIN32 */ 1256 1257 #include <unistd.h> 1258 1259 void 1260 socket_close( int fd ) 1261 { 1262 int old_errno = errno; 1263 1264 shutdown( fd, SHUT_RDWR ); 1265 close( fd ); 1266 1267 errno = old_errno; 1268 } 1269 1270 #endif /* !_WIN32 */ 1271 1272 1273 static int 1274 socket_bind_server( int s, const SockAddress* to, SocketType type ) 1275 { 1276 socket_set_xreuseaddr(s); 1277 1278 if (socket_bind(s, to) < 0) { 1279 D("could not bind server socket address %s: %s", 1280 sock_address_to_string(to), errno_str); 1281 goto FAIL; 1282 } 1283 1284 if (type == SOCKET_STREAM) { 1285 if (socket_listen(s, 4) < 0) { 1286 D("could not listen server socket %s: %s", 1287 sock_address_to_string(to), errno_str); 1288 goto FAIL; 1289 } 1290 } 1291 return s; 1292 1293 FAIL: 1294 socket_close(s); 1295 return -1; 1296 } 1297 1298 1299 static int 1300 socket_connect_client( int s, const SockAddress* to ) 1301 { 1302 if (socket_connect(s, to) < 0) { 1303 D( "could not connect client socket to %s: %s\n", 1304 sock_address_to_string(to), errno_str ); 1305 socket_close(s); 1306 return -1; 1307 } 1308 1309 socket_set_nonblock( s ); 1310 return s; 1311 } 1312 1313 1314 static int 1315 socket_in_server( int address, int port, SocketType type ) 1316 { 1317 SockAddress addr; 1318 int s; 1319 1320 sock_address_init_inet( &addr, address, port ); 1321 s = socket_create_inet( type ); 1322 if (s < 0) 1323 return -1; 1324 1325 return socket_bind_server( s, &addr, type ); 1326 } 1327 1328 1329 static int 1330 socket_in_client( SockAddress* to, SocketType type ) 1331 { 1332 int s; 1333 1334 s = socket_create_inet( type ); 1335 if (s < 0) return -1; 1336 1337 return socket_connect_client( s, to ); 1338 } 1339 1340 1341 int 1342 socket_loopback_server( int port, SocketType type ) 1343 { 1344 return socket_in_server( SOCK_ADDRESS_INET_LOOPBACK, port, type ); 1345 } 1346 1347 int 1348 socket_loopback_client( int port, SocketType type ) 1349 { 1350 SockAddress addr; 1351 1352 sock_address_init_inet( &addr, SOCK_ADDRESS_INET_LOOPBACK, port ); 1353 return socket_in_client( &addr, type ); 1354 } 1355 1356 1357 int 1358 socket_network_client( const char* host, int port, SocketType type ) 1359 { 1360 SockAddress addr; 1361 1362 if (sock_address_init_resolve( &addr, host, port, 0) < 0) 1363 return -1; 1364 1365 return socket_in_client( &addr, type ); 1366 } 1367 1368 1369 int 1370 socket_anyaddr_server( int port, SocketType type ) 1371 { 1372 return socket_in_server( SOCK_ADDRESS_INET_ANY, port, type ); 1373 } 1374 1375 int 1376 socket_accept_any( int server_fd ) 1377 { 1378 int fd; 1379 1380 QSOCKET_CALL(fd, accept( server_fd, NULL, 0 )); 1381 if (fd < 0) { 1382 D( "could not accept client connection from fd %d: %s", 1383 server_fd, errno_str ); 1384 return -1; 1385 } 1386 1387 /* set to non-blocking */ 1388 socket_set_nonblock( fd ); 1389 return fd; 1390 } 1391 1392 1393 #if HAVE_UNIX_SOCKETS 1394 1395 int 1396 socket_unix_server( const char* name, SocketType type ) 1397 { 1398 SockAddress addr; 1399 int s, ret; 1400 1401 s = socket_create_unix( type ); 1402 if (s < 0) 1403 return -1; 1404 1405 sock_address_init_unix( &addr, name ); 1406 1407 do { 1408 ret = unlink( name ); 1409 } while (ret < 0 && errno == EINTR); 1410 1411 ret = socket_bind_server( s, &addr, type ); 1412 1413 sock_address_done( &addr ); 1414 return ret; 1415 } 1416 1417 int 1418 socket_unix_client( const char* name, SocketType type ) 1419 { 1420 SockAddress addr; 1421 int s, ret; 1422 1423 s = socket_create_unix(type); 1424 if (s < 0) 1425 return -1; 1426 1427 sock_address_init_unix( &addr, name ); 1428 1429 ret = socket_connect_client( s, &addr ); 1430 1431 sock_address_done( &addr ); 1432 return ret; 1433 } 1434 1435 #endif /* HAVE_UNIX_SOCKETS */ 1436 1437 1438 1439 int 1440 socket_pair(int *fd1, int *fd2) 1441 { 1442 #ifndef _WIN32 1443 int fds[2]; 1444 int ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds); 1445 1446 if (!ret) { 1447 socket_set_nonblock(fds[0]); 1448 socket_set_nonblock(fds[1]); 1449 *fd1 = fds[0]; 1450 *fd2 = fds[1]; 1451 } 1452 return ret; 1453 #else /* _WIN32 */ 1454 /* on Windows, select() only works with network sockets, which 1455 * means we absolutely cannot use Win32 PIPEs to implement 1456 * socket pairs with the current event loop implementation. 1457 * We're going to do like Cygwin: create a random pair 1458 * of localhost TCP sockets and connect them together 1459 */ 1460 int s0, s1, s2, port; 1461 struct sockaddr_in sockin; 1462 socklen_t len; 1463 1464 /* first, create the 'server' socket. 1465 * a port number of 0 means 'any port between 1024 and 5000. 1466 * see Winsock bind() documentation for details */ 1467 s0 = socket_loopback_server( 0, SOCK_STREAM ); 1468 if (s0 < 0) 1469 return -1; 1470 1471 /* now connect a client socket to it, we first need to 1472 * extract the server socket's port number */ 1473 len = sizeof sockin; 1474 if (getsockname(s0, (struct sockaddr*) &sockin, &len) < 0) { 1475 closesocket (s0); 1476 return -1; 1477 } 1478 1479 port = ntohs(sockin.sin_port); 1480 s2 = socket_loopback_client( port, SOCK_STREAM ); 1481 if (s2 < 0) { 1482 closesocket(s0); 1483 return -1; 1484 } 1485 1486 /* we need to accept the connection on the server socket 1487 * this will create the second socket for the pair 1488 */ 1489 len = sizeof sockin; 1490 s1 = accept(s0, (struct sockaddr*) &sockin, &len); 1491 if (s1 == INVALID_SOCKET) { 1492 closesocket (s0); 1493 closesocket (s2); 1494 return -1; 1495 } 1496 socket_set_nonblock(s1); 1497 1498 /* close server socket */ 1499 closesocket(s0); 1500 *fd1 = s1; 1501 *fd2 = s2; 1502 return 0; 1503 #endif /* _WIN32 */ 1504 } 1505 1506 1507 1508 int 1509 socket_mcast_inet_add_membership( int s, uint32_t ip ) 1510 { 1511 struct ip_mreq imr; 1512 1513 imr.imr_multiaddr.s_addr = htonl(ip); 1514 imr.imr_interface.s_addr = htonl(INADDR_ANY); 1515 1516 if ( setsockopt( s, IPPROTO_IP, IP_ADD_MEMBERSHIP, 1517 (const char *)&imr, 1518 sizeof(struct ip_mreq)) < 0 ) 1519 { 1520 return _fix_errno(); 1521 } 1522 return 0; 1523 } 1524 1525 int 1526 socket_mcast_inet_drop_membership( int s, uint32_t ip ) 1527 { 1528 struct ip_mreq imr; 1529 1530 imr.imr_multiaddr.s_addr = htonl(ip); 1531 imr.imr_interface.s_addr = htonl(INADDR_ANY); 1532 1533 if ( setsockopt( s, IPPROTO_IP, IP_DROP_MEMBERSHIP, 1534 (const char *)&imr, 1535 sizeof(struct ip_mreq)) < 0 ) 1536 { 1537 return _fix_errno(); 1538 } 1539 return 0; 1540 } 1541 1542 int 1543 socket_mcast_inet_set_loop( int s, int enabled ) 1544 { 1545 return socket_setoption( s, IPPROTO_IP, IP_MULTICAST_LOOP, !!enabled ); 1546 } 1547 1548 int 1549 socket_mcast_inet_set_ttl( int s, int ttl ) 1550 { 1551 return socket_setoption( s, IPPROTO_IP, IP_MULTICAST_TTL, ttl ); 1552 } 1553 1554 1555 char* 1556 host_name( void ) 1557 { 1558 static char buf[256]; /* 255 is the max host name length supported by DNS */ 1559 int ret; 1560 1561 QSOCKET_CALL(ret, gethostname(buf, sizeof(buf))); 1562 1563 if (ret < 0) 1564 return "localhost"; 1565 else 1566 return buf; 1567 } 1568
