1 #include "first.h" 2 3 #include "network.h" 4 #include "base.h" 5 #include "fdevent.h" 6 #include "log.h" 7 #include "connections.h" 8 #include "plugin.h" 9 #include "sock_addr.h" 10 11 #include "network_write.h" 12 #include "sys-socket.h" 13 14 #include <sys/types.h> 15 #include <sys/stat.h> 16 #include "sys-time.h" 17 18 #include <errno.h> 19 #include <fcntl.h> 20 #include <unistd.h> 21 #include <string.h> 22 #include <stdlib.h> 23 24 void 25 network_accept_tcp_nagle_disable (const int fd) 26 { 27 static int noinherit_tcpnodelay = -1; 28 int opt; 29 30 if (!noinherit_tcpnodelay) /* TCP_NODELAY inherited from listen socket */ 31 return; 32 33 if (noinherit_tcpnodelay < 0) { 34 socklen_t optlen = sizeof(opt); 35 if (0 == getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen)) { 36 noinherit_tcpnodelay = !opt; 37 if (opt) /* TCP_NODELAY inherited from listen socket */ 38 return; 39 } 40 } 41 42 opt = 1; 43 (void)setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)); 44 } 45 46 static handler_t network_server_handle_fdevent(void *context, int revents) { 47 const server_socket * const srv_socket = (server_socket *)context; 48 server * const srv = srv_socket->srv; 49 50 if (0 == (revents & FDEVENT_IN)) { 51 log_error(srv->errh, __FILE__, __LINE__, 52 "strange event for server socket %d %d", srv_socket->fd, revents); 53 return HANDLER_ERROR; 54 } 55 56 /* accept()s at most 100 new connections before 57 * jumping out to process events on other connections */ 58 int loops = (int)srv->lim_conns; 59 if (loops > 100) 60 loops = 100; 61 else if (loops <= 0) 62 return HANDLER_GO_ON; 63 64 const int nagle_disable = 65 (sock_addr_get_family(&srv_socket->addr) != AF_UNIX); 66 67 sock_addr addr; 68 size_t addrlen; /*(size_t intentional; not socklen_t)*/ 69 do { 70 addrlen = sizeof(addr); 71 int fd = fdevent_accept_listenfd(srv_socket->fd, 72 (struct sockaddr *)&addr, &addrlen); 73 if (-1 == fd) break; 74 75 if (nagle_disable) 76 network_accept_tcp_nagle_disable(fd); 77 78 connection *con = connection_accepted(srv, srv_socket, &addr, fd); 79 if (__builtin_expect( (!con), 0)) return HANDLER_GO_ON; 80 connection_state_machine(con); 81 } while (--loops); 82 83 if (loops) { 84 switch (errno) { 85 case EAGAIN: 86 #if EWOULDBLOCK != EAGAIN 87 case EWOULDBLOCK: 88 #endif 89 case EINTR: 90 case ECONNABORTED: 91 case EMFILE: 92 break; 93 default: 94 log_perror(srv->errh, __FILE__, __LINE__, "accept()"); 95 } 96 } 97 98 return HANDLER_GO_ON; 99 } 100 101 static void network_host_normalize_addr_str(buffer *host, sock_addr *addr) { 102 buffer_clear(host); 103 sock_addr_stringify_append_buffer(host, addr); 104 } 105 106 static int network_host_parse_addr(server *srv, sock_addr *addr, socklen_t *addr_len, buffer *host, int use_ipv6) { 107 char *h; 108 char *colon = NULL; 109 const char *chost; 110 sa_family_t family = use_ipv6 ? AF_INET6 : AF_INET; 111 unsigned int port = srv->srvconf.port; 112 if (buffer_is_blank(host)) { 113 log_error(srv->errh, __FILE__, __LINE__, 114 "value of $SERVER[\"socket\"] must not be empty"); 115 return -1; 116 } 117 h = host->ptr; 118 if (h[0] == '/') { 119 #ifdef HAVE_SYS_UN_H 120 return (1 == 121 sock_addr_from_str_hints(addr,addr_len,h,AF_UNIX,0,srv->errh)) 122 ? 0 123 : -1; 124 #else 125 log_error(srv, __FILE__, __LINE__, 126 "ERROR: Unix Domain sockets are not supported."); 127 return -1; 128 #endif 129 } 130 buffer * const tb = srv->tmp_buf; 131 buffer_copy_buffer(tb, host); 132 h = tb->ptr; 133 if (h[0] == '[') { 134 family = AF_INET6; 135 if ((h = strchr(h, ']'))) { 136 *h++ = '\0'; 137 if (*h == ':') colon = h; 138 } /*(else should not happen; validated in configparser.y)*/ 139 h = tb->ptr+1; 140 } 141 else { 142 colon = strrchr(h, ':'); 143 } 144 if (colon) { 145 *colon++ = '\0'; 146 port = (unsigned int)strtol(colon, NULL, 10); 147 if (port == 0 || port > 65535) { 148 log_error(srv->errh, __FILE__, __LINE__, 149 "port not set or out of range: %u", port); 150 return -1; 151 } 152 } 153 if (h[0] == '*' && h[1] == '\0') { 154 family = AF_INET; 155 ++h; 156 } 157 chost = *h ? h : family == AF_INET ? "0.0.0.0" : "::"; 158 if (1 != 159 sock_addr_from_str_hints(addr,addr_len,chost,family,port,srv->errh)) { 160 return -1; 161 } 162 return 0; 163 } 164 165 static void network_srv_sockets_append(server *srv, server_socket *srv_socket) { 166 if (srv->srv_sockets.used == srv->srv_sockets.size) { 167 srv->srv_sockets.size += 4; 168 srv->srv_sockets.ptr = realloc(srv->srv_sockets.ptr, srv->srv_sockets.size * sizeof(server_socket*)); 169 force_assert(NULL != srv->srv_sockets.ptr); 170 } 171 172 srv->srv_sockets.ptr[srv->srv_sockets.used++] = srv_socket; 173 } 174 175 typedef struct { 176 /* global or per-socket config; not patched per connection */ 177 int listen_backlog; 178 unsigned char ssl_enabled; 179 unsigned char use_ipv6; 180 unsigned char set_v6only; /* set_v6only is only a temporary option */ 181 unsigned char defer_accept; 182 int8_t v4mapped; 183 const buffer *socket_perms; 184 const buffer *bsd_accept_filter; 185 } network_socket_config; 186 187 typedef struct { 188 PLUGIN_DATA; 189 network_socket_config defaults; 190 network_socket_config conf; 191 } network_plugin_data; 192 193 static void network_merge_config_cpv(network_socket_config * const pconf, const config_plugin_value_t * const cpv) { 194 switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */ 195 case 0: /* ssl.engine */ 196 pconf->ssl_enabled = (0 != cpv->v.u); 197 break; 198 case 1: /* server.listen-backlog */ 199 pconf->listen_backlog = (int)cpv->v.u; 200 break; 201 case 2: /* server.socket-perms */ 202 pconf->socket_perms = cpv->v.b; 203 break; 204 case 3: /* server.bsd-accept-filter */ 205 pconf->bsd_accept_filter = cpv->v.b; 206 break; 207 case 4: /* server.defer-accept */ 208 pconf->defer_accept = (0 != cpv->v.u); 209 break; 210 case 5: /* server.use-ipv6 */ 211 pconf->use_ipv6 = (0 != cpv->v.u); 212 break; 213 case 6: /* server.set-v6only */ 214 pconf->set_v6only = (0 != cpv->v.u); 215 break; 216 case 7: /* server.v4mapped */ 217 pconf->v4mapped = (0 != cpv->v.u); 218 break; 219 default:/* should not happen */ 220 return; 221 } 222 } 223 224 static void network_merge_config(network_socket_config * const pconf, const config_plugin_value_t *cpv) { 225 do { 226 network_merge_config_cpv(pconf, cpv); 227 } while ((++cpv)->k_id != -1); 228 } 229 230 __attribute_pure__ 231 static uint8_t network_srv_token_colon (const buffer * const b) { 232 const char *colon = NULL; 233 const char * const p = b->ptr; 234 if (*p == '[') { 235 colon = strstr(p, "]:"); 236 if (colon) ++colon; 237 } 238 else if (*p != '/') { 239 colon = strchr(p, ':'); 240 } 241 return colon ? (uint8_t)(colon - p) : (uint8_t)buffer_clen(b); 242 } 243 244 static int network_server_init(server *srv, network_socket_config *s, buffer *host_token, size_t sidx, int stdin_fd) { 245 server_socket *srv_socket; 246 const char *host; 247 socklen_t addr_len = sizeof(sock_addr); 248 sock_addr addr; 249 int family = 0; 250 int set_v6only = 0; 251 252 if (buffer_is_blank(host_token)) { 253 log_error(srv->errh, __FILE__, __LINE__, 254 "value of $SERVER[\"socket\"] must not be empty"); 255 return -1; 256 } 257 258 /* check if we already know this socket, and if yes, don't init it 259 * (optimization: check strings here to filter out exact matches; 260 * binary addresses are matched further below) */ 261 for (uint32_t i = 0; i < srv->srv_sockets.used; ++i) { 262 if (buffer_is_equal(srv->srv_sockets.ptr[i]->srv_token, host_token)) { 263 return 0; 264 } 265 } 266 267 host = host_token->ptr; 268 if ((s->use_ipv6 && (*host == '\0' || *host == ':')) || (host[0] == '[' && host[1] == ']')) { 269 log_error(srv->errh, __FILE__, __LINE__, 270 "warning: please use server.use-ipv6 only for hostnames, " 271 "not without server.bind / empty address; your config will " 272 "break if the kernel default for IPV6_V6ONLY changes"); 273 } 274 if (*host == '[') s->use_ipv6 = 1; 275 276 memset(&addr, 0, sizeof(addr)); 277 if (-1 != stdin_fd) { 278 if (-1 == getsockname(stdin_fd, (struct sockaddr *)&addr, &addr_len)) { 279 log_perror(srv->errh, __FILE__, __LINE__, "getsockname()"); 280 return -1; 281 } 282 } else if (0 != network_host_parse_addr(srv, &addr, &addr_len, host_token, s->use_ipv6)) { 283 return -1; 284 } 285 286 family = sock_addr_get_family(&addr); 287 288 #ifdef HAVE_IPV6 289 if (*host != '\0' && AF_INET6 == family) { 290 if (s->set_v6only) { 291 set_v6only = 1; 292 } else { 293 log_error(srv->errh, __FILE__, __LINE__, 294 "warning: server.set-v6only will be removed soon, " 295 "update your config to have different sockets for ipv4 and ipv6"); 296 } 297 } 298 if (AF_INET6 == family && -1 != s->v4mapped) { /*(configured; -1 is unset)*/ 299 set_v6only = (s->v4mapped ? -1 : 1); 300 } 301 #endif 302 303 network_host_normalize_addr_str(host_token, &addr); 304 host = host_token->ptr; 305 306 if (srv->srvconf.preflight_check) { 307 return 0; 308 } 309 310 /* check if we already know this socket (after potential DNS resolution), and if yes, don't init it */ 311 for (uint32_t i = 0; i < srv->srv_sockets.used; ++i) { 312 if (0 == memcmp(&srv->srv_sockets.ptr[i]->addr, &addr, sizeof(addr))) { 313 return 0; 314 } 315 } 316 317 srv_socket = calloc(1, sizeof(*srv_socket)); 318 force_assert(NULL != srv_socket); 319 memcpy(&srv_socket->addr, &addr, addr_len); 320 srv_socket->fd = -1; 321 srv_socket->sidx = sidx; 322 srv_socket->is_ssl = s->ssl_enabled; 323 srv_socket->srv = srv; 324 srv_socket->srv_token = buffer_init_buffer(host_token); 325 srv_socket->srv_token_colon = 326 network_srv_token_colon(srv_socket->srv_token); 327 328 network_srv_sockets_append(srv, srv_socket); 329 330 if (srv->sockets_disabled) { /* lighttpd -1 (one-shot mode) */ 331 return 0; 332 } 333 334 if (srv->srvconf.systemd_socket_activation) { 335 for (uint32_t i = 0; i < srv->srv_sockets_inherited.used; ++i) { 336 if (0 != memcmp(&srv->srv_sockets_inherited.ptr[i]->addr, &srv_socket->addr, addr_len)) continue; 337 if ((unsigned short)~0u == srv->srv_sockets_inherited.ptr[i]->sidx) { 338 srv->srv_sockets_inherited.ptr[i]->sidx = sidx; 339 } 340 stdin_fd = srv->srv_sockets_inherited.ptr[i]->fd; 341 break; 342 } 343 } 344 345 if (-1 != stdin_fd) { 346 srv_socket->fd = stdin_fd; 347 if (-1 == fdevent_fcntl_set_nb_cloexec(stdin_fd)) { 348 log_perror(srv->errh, __FILE__, __LINE__, "fcntl"); 349 return -1; 350 } 351 } else 352 #ifdef HAVE_SYS_UN_H 353 if (AF_UNIX == family) { 354 /* check if the socket exists and try to connect to it. */ 355 force_assert(host); /*(static analysis hint)*/ 356 if (-1 == (srv_socket->fd = fdevent_socket_cloexec(AF_UNIX, SOCK_STREAM, 0))) { 357 log_perror(srv->errh, __FILE__, __LINE__, "socket"); 358 return -1; 359 } 360 if (0 == connect(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) { 361 log_error(srv->errh, __FILE__, __LINE__, 362 "server socket is still in use: %s", host); 363 return -1; 364 } 365 366 /* connect failed */ 367 switch(errno) { 368 case ECONNREFUSED: 369 unlink(host); 370 break; 371 case ENOENT: 372 break; 373 default: 374 log_perror(srv->errh, __FILE__, __LINE__, 375 "testing socket failed: %s", host); 376 return -1; 377 } 378 379 if (-1 == fdevent_fcntl_set_nb(srv_socket->fd)) { 380 log_perror(srv->errh, __FILE__, __LINE__, "fcntl"); 381 return -1; 382 } 383 } else 384 #endif 385 { 386 if (-1 == (srv_socket->fd = fdevent_socket_nb_cloexec(family, SOCK_STREAM, IPPROTO_TCP))) { 387 log_perror(srv->errh, __FILE__, __LINE__, "socket"); 388 return -1; 389 } 390 391 #ifdef HAVE_IPV6 392 if (set_v6only) { 393 int val = (set_v6only > 0); 394 if (-1 == setsockopt(srv_socket->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) { 395 log_perror(srv->errh, __FILE__, __LINE__, "setsockopt(IPV6_V6ONLY)"); 396 return -1; 397 } 398 } 399 #endif 400 } 401 402 /* */ 403 srv->cur_fds = srv_socket->fd; 404 405 if (fdevent_set_so_reuseaddr(srv_socket->fd, 1) < 0) { 406 log_perror(srv->errh, __FILE__, __LINE__, "setsockopt(SO_REUSEADDR)"); 407 return -1; 408 } 409 410 if (family != AF_UNIX) { 411 if (fdevent_set_tcp_nodelay(srv_socket->fd, 1) < 0) { 412 log_perror(srv->errh, __FILE__, __LINE__, "setsockopt(TCP_NODELAY)"); 413 return -1; 414 } 415 } 416 417 if (-1 != stdin_fd) { } else 418 if (0 != bind(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) { 419 log_perror(srv->errh, __FILE__, __LINE__, 420 "can't bind to socket: %s", host); 421 return -1; 422 } 423 424 if (-1 != stdin_fd) { } else 425 if (AF_UNIX == family && s->socket_perms) { 426 mode_t m = 0; 427 for (char *str = s->socket_perms->ptr; *str; ++str) { 428 m <<= 3; 429 m |= (*str - '0'); 430 } 431 if (0 != m && -1 == chmod(host, m)) { 432 log_perror(srv->errh, __FILE__, __LINE__, 433 "chmod(\"%s\", %s)", host, s->socket_perms->ptr); 434 return -1; 435 } 436 } 437 438 if (-1 != stdin_fd) { } else 439 if (-1 == listen(srv_socket->fd, s->listen_backlog)) { 440 log_perror(srv->errh, __FILE__, __LINE__, "listen"); 441 return -1; 442 } 443 444 if (s->ssl_enabled) { 445 #ifdef TCP_DEFER_ACCEPT 446 } else if (s->defer_accept) { 447 int v = s->defer_accept; 448 if (-1 == setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &v, sizeof(v))) { 449 log_perror(srv->errh, __FILE__, __LINE__, "can't set TCP_DEFER_ACCEPT"); 450 } 451 #endif 452 #if defined(__FreeBSD__) || defined(__NetBSD__) \ 453 || defined(__OpenBSD__) || defined(__DragonFly__) 454 } else if (s->bsd_accept_filter 455 && (buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("httpready")) 456 || buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("dataready")))) { 457 #ifdef SO_ACCEPTFILTER 458 /* FreeBSD accf_http filter */ 459 struct accept_filter_arg afa; 460 memset(&afa, 0, sizeof(afa)); 461 strncpy(afa.af_name, s->bsd_accept_filter->ptr, sizeof(afa.af_name)-1); 462 if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)) < 0) { 463 if (errno != ENOENT) { 464 log_perror(srv->errh, __FILE__, __LINE__, 465 "can't set accept-filter '%s'", s->bsd_accept_filter->ptr); 466 } 467 } 468 #endif 469 #endif 470 } 471 472 return 0; 473 } 474 475 int network_close(server *srv) { 476 for (uint32_t i = 0; i < srv->srv_sockets.used; ++i) { 477 server_socket *srv_socket = srv->srv_sockets.ptr[i]; 478 if (srv_socket->fd != -1) { 479 network_unregister_sock(srv, srv_socket); 480 close(srv_socket->fd); 481 } 482 483 buffer_free(srv_socket->srv_token); 484 485 free(srv_socket); 486 } 487 488 free(srv->srv_sockets.ptr); 489 srv->srv_sockets.ptr = NULL; 490 srv->srv_sockets.used = 0; 491 srv->srv_sockets.size = 0; 492 493 for (uint32_t i = 0; i < srv->srv_sockets_inherited.used; ++i) { 494 server_socket *srv_socket = srv->srv_sockets_inherited.ptr[i]; 495 if (srv_socket->fd != -1 && srv_socket->sidx != (unsigned short)~0u) { 496 close(srv_socket->fd); 497 } 498 499 buffer_free(srv_socket->srv_token); 500 501 free(srv_socket); 502 } 503 504 free(srv->srv_sockets_inherited.ptr); 505 srv->srv_sockets_inherited.ptr = NULL; 506 srv->srv_sockets_inherited.used = 0; 507 srv->srv_sockets_inherited.size = 0; 508 509 return 0; 510 } 511 512 void network_socket_activation_to_env (server * const srv) { 513 /* set up listening sockets for systemd socket activation 514 * and ensure FD_CLOEXEC flag is not set on listen fds */ 515 int fd = 3; /* #define SD_LISTEN_FDS_START 3 */ 516 for (uint32_t n = 0, i; n < srv->srv_sockets.used; ++n) { 517 server_socket *srv_socket = srv->srv_sockets.ptr[n]; 518 if (srv_socket->fd < fd) continue; 519 if (srv_socket->fd == fd) { 520 fdevent_clrfd_cloexec(fd); 521 ++fd; 522 continue; 523 } 524 /* (expecting ordered list, but check if fd is later in list)*/ 525 for (i = n+1; i < srv->srv_sockets.used; ++i) { 526 if (fd == srv->srv_sockets.ptr[i]->fd) 527 break; 528 } 529 if (i < srv->srv_sockets.used) { 530 fdevent_clrfd_cloexec(fd); 531 ++fd; 532 --n; /* loop to reprocess this entry */ 533 continue; 534 } 535 536 /* dup2() removes FD_CLOEXEC on newfd */ 537 if (fd != dup2(srv_socket->fd, fd)) continue; 538 ++fd; 539 /* old fd will be closed upon execv() due to its FD_CLOEXEC flag 540 * (if not already closed by another dup2() over it) */ 541 } 542 fd -= 3; /* now num fds; #define SD_LISTEN_FDS_START 3 */ 543 if (0 == fd) return; /*(no active sockets?)*/ 544 buffer * const tb = srv->tmp_buf; 545 buffer_clear(tb); 546 buffer_append_int(tb, fd); 547 setenv("LISTEN_FDS", tb->ptr, 1); 548 buffer_clear(tb); 549 buffer_append_int(tb, srv->pid); /* getpid() */ 550 setenv("LISTEN_PID", tb->ptr, 1); 551 } 552 553 static int network_socket_activation_nfds(server *srv, network_socket_config *s, int nfds) { 554 buffer *host = buffer_init(); 555 socklen_t addr_len; 556 sock_addr addr; 557 int rc = 0; 558 nfds += 3; /* #define SD_LISTEN_FDS_START 3 */ 559 for (int fd = 3; fd < nfds; ++fd) { 560 addr_len = sizeof(sock_addr); 561 if (-1 == (rc = getsockname(fd, (struct sockaddr *)&addr, &addr_len))) { 562 log_perror(srv->errh, __FILE__, __LINE__, 563 "socket activation getsockname()"); 564 break; 565 } 566 network_host_normalize_addr_str(host, &addr); 567 rc = network_server_init(srv, s, host, 0, fd); 568 if (0 != rc) break; 569 srv->srv_sockets.ptr[srv->srv_sockets.used-1]->sidx = (unsigned short)~0u; 570 } 571 buffer_free(host); 572 memcpy(&srv->srv_sockets_inherited, &srv->srv_sockets, sizeof(server_socket_array)); 573 memset(&srv->srv_sockets, 0, sizeof(server_socket_array)); 574 return rc; 575 } 576 577 static int network_socket_activation_from_env(server *srv, network_socket_config *s) { 578 char *listen_pid = getenv("LISTEN_PID"); 579 char *listen_fds = getenv("LISTEN_FDS"); 580 pid_t lpid = listen_pid ? (pid_t)strtoul(listen_pid,NULL,10) : 0; 581 int nfds = listen_fds ? atoi(listen_fds) : 0; 582 int rc = (lpid == getpid() && nfds > 0 && nfds < 5000) 583 ? network_socket_activation_nfds(srv, s, nfds) 584 : 0; 585 unsetenv("LISTEN_PID"); 586 unsetenv("LISTEN_FDS"); 587 unsetenv("LISTEN_FDNAMES"); 588 /*(upon graceful restart, unsetenv will result in no-op above)*/ 589 return rc; 590 } 591 592 int network_init(server *srv, int stdin_fd) { 593 /*(network params used during setup (from $SERVER["socket"] condition))*/ 594 static const config_plugin_keys_t cpk[] = { 595 { CONST_STR_LEN("ssl.engine"), 596 T_CONFIG_BOOL, 597 T_CONFIG_SCOPE_CONNECTION } 598 ,{ CONST_STR_LEN("server.listen-backlog"), 599 T_CONFIG_INT, 600 T_CONFIG_SCOPE_CONNECTION } 601 ,{ CONST_STR_LEN("server.socket-perms"), 602 T_CONFIG_STRING, 603 T_CONFIG_SCOPE_CONNECTION } 604 ,{ CONST_STR_LEN("server.bsd-accept-filter"), 605 T_CONFIG_STRING, 606 T_CONFIG_SCOPE_CONNECTION } 607 ,{ CONST_STR_LEN("server.defer-accept"), 608 T_CONFIG_BOOL, 609 T_CONFIG_SCOPE_CONNECTION } 610 ,{ CONST_STR_LEN("server.use-ipv6"), 611 T_CONFIG_BOOL, 612 T_CONFIG_SCOPE_CONNECTION } 613 ,{ CONST_STR_LEN("server.set-v6only"), 614 T_CONFIG_BOOL, 615 T_CONFIG_SCOPE_CONNECTION } 616 ,{ CONST_STR_LEN("server.v4mapped"), 617 T_CONFIG_BOOL, 618 T_CONFIG_SCOPE_CONNECTION } 619 #if 0 /* TODO: more integration needed ... */ 620 ,{ CONST_STR_LEN("mbedtls.engine"), 621 T_CONFIG_BOOL, 622 T_CONFIG_SCOPE_CONNECTION } 623 #endif 624 ,{ NULL, 0, 625 T_CONFIG_UNSET, 626 T_CONFIG_SCOPE_UNSET } 627 }; 628 629 #ifdef __WIN32 630 WSADATA wsaData; 631 WORD wVersionRequested = MAKEWORD(2, 2); 632 if (0 != WSAStartup(wVersionRequested, &wsaData)) { 633 /* Tell the user that we could not find a usable WinSock DLL */ 634 return -1; 635 } 636 #endif 637 638 if (0 != network_write_init(srv)) return -1; 639 640 network_plugin_data np; 641 memset(&np, 0, sizeof(network_plugin_data)); 642 network_plugin_data *p = &np; 643 644 if (!config_plugin_values_init(srv, p, cpk, "network")) 645 return HANDLER_ERROR; 646 647 p->defaults.listen_backlog = 1024; 648 p->defaults.defer_accept = 0; 649 p->defaults.use_ipv6 = 0; 650 p->defaults.set_v6only = 1; 651 p->defaults.v4mapped = -1; /*(-1 for unset; not 0 or 1)*/ 652 653 /* initialize p->defaults from global config context */ 654 if (p->nconfig > 0 && p->cvlist->v.u2[1]) { 655 const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0]; 656 if (-1 != cpv->k_id) 657 network_merge_config(&p->defaults, cpv); 658 } 659 660 int rc = 0; 661 do { 662 663 if (srv->srvconf.systemd_socket_activation) { 664 for (uint32_t i = 0; i < srv->srv_sockets_inherited.used; ++i) { 665 srv->srv_sockets_inherited.ptr[i]->sidx = (unsigned short)~0u; 666 } 667 rc = network_socket_activation_from_env(srv, &p->defaults); 668 if (0 != rc) break; 669 if (0 == srv->srv_sockets_inherited.used) { 670 srv->srvconf.systemd_socket_activation = 0; 671 } 672 } 673 674 /* special-case srv->srvconf.bindhost = "/dev/stdin" (see server.c) */ 675 if (-1 != stdin_fd) { 676 buffer *b = buffer_init(); 677 buffer_copy_buffer(b, srv->srvconf.bindhost); 678 /*assert(buffer_eq_slen(b, CONST_STR_LEN("/dev/stdin")));*/ 679 rc = (0 == srv->srv_sockets.used) 680 ? network_server_init(srv, &p->defaults, b, 0, stdin_fd) 681 : close(stdin_fd);/*(graceful restart listening to "/dev/stdin")*/ 682 buffer_free(b); 683 if (0 != rc) break; 684 } 685 686 /* check for $SERVER["socket"] */ 687 for (uint32_t i = 1; i < srv->config_context->used; ++i) { 688 config_cond_info cfginfo; 689 config_get_config_cond_info(&cfginfo, i); 690 if (COMP_SERVER_SOCKET != cfginfo.comp) continue;/* not our stage */ 691 692 buffer *host_token; 693 *(const buffer **)&host_token = cfginfo.string; 694 /*(cfginfo.string is modified during config)*/ 695 696 memcpy(&p->conf, &p->defaults, sizeof(network_socket_config)); 697 for (int j = !p->cvlist[0].v.u2[1]; j < p->nconfig; ++j) { 698 if ((int)i != p->cvlist[j].k_id) continue; 699 const config_plugin_value_t *cpv = 700 p->cvlist + p->cvlist[j].v.u2[0]; 701 network_merge_config(&p->conf, cpv); 702 break; 703 } 704 705 if (cfginfo.cond == CONFIG_COND_EQ) { 706 rc = network_server_init(srv, &p->conf, host_token, i, -1); 707 if (0 != rc) break; 708 } 709 else if (cfginfo.cond == CONFIG_COND_NE) { 710 socklen_t addr_len = sizeof(sock_addr); 711 sock_addr addr; 712 rc = network_host_parse_addr(srv, &addr, &addr_len, 713 host_token, p->conf.use_ipv6); 714 if (0 != rc) break; 715 network_host_normalize_addr_str(host_token, &addr); 716 } 717 } 718 if (0 != rc) break; 719 720 /* process srv->srvconf.bindhost 721 * init global config for server.bindhost and server.port after 722 * initializing $SERVER["socket"] so that if bindhost and port match 723 * another $SERVER["socket"], the $SERVER["socket"] config is used, 724 * as the $SERVER["socket"] config inherits from the global scope and 725 * can then be overridden. (bindhost = "/dev/stdin" is handled above) 726 * (skip if systemd socket activation is enabled and bindhost is empty; 727 * do not additionally listen on "*") */ 728 if ((!srv->srvconf.systemd_socket_activation || srv->srvconf.bindhost) 729 && -1 == stdin_fd) { 730 buffer *b = buffer_init(); 731 if (srv->srvconf.bindhost) 732 buffer_copy_buffer(b, srv->srvconf.bindhost); 733 /*(skip adding port if unix socket path)*/ 734 if (!b->ptr || b->ptr[0] != '/') { 735 buffer_append_string_len(b, CONST_STR_LEN(":")); 736 buffer_append_int(b, srv->srvconf.port); 737 } 738 #ifdef __COVERITY__ 739 force_assert(b->ptr); 740 #endif 741 742 rc = network_server_init(srv, &p->defaults, b, 0, -1); 743 buffer_free(b); 744 if (0 != rc) break; 745 } 746 747 if (srv->srvconf.systemd_socket_activation) { 748 /* activate any inherited sockets not explicitly listed in config */ 749 server_socket *srv_socket; 750 for (uint32_t i = 0; i < srv->srv_sockets_inherited.used; ++i) { 751 if ((unsigned short)~0u 752 != srv->srv_sockets_inherited.ptr[i]->sidx) 753 continue; 754 srv->srv_sockets_inherited.ptr[i]->sidx = 0; 755 srv_socket = calloc(1, sizeof(server_socket)); 756 force_assert(NULL != srv_socket); 757 memcpy(srv_socket, srv->srv_sockets_inherited.ptr[i], 758 sizeof(server_socket)); 759 srv_socket->srv_token = 760 buffer_init_buffer(srv_socket->srv_token); 761 srv_socket->srv_token_colon = 762 network_srv_token_colon(srv_socket->srv_token); 763 network_srv_sockets_append(srv, srv_socket); 764 } 765 } 766 767 } while (0); 768 769 free(p->cvlist); 770 return rc; 771 } 772 773 void network_unregister_sock(server *srv, server_socket *srv_socket) { 774 fdnode *fdn = srv_socket->fdn; 775 if (NULL == fdn) return; 776 fdevent_fdnode_event_del(srv->ev, fdn); 777 fdevent_unregister(srv->ev, fdn->fd); 778 srv_socket->fdn = NULL; 779 } 780 781 int network_register_fdevents(server *srv) { 782 if (-1 == fdevent_reset(srv->ev)) { 783 return -1; 784 } 785 786 if (srv->sockets_disabled) return 0; /* lighttpd -1 (one-shot mode) */ 787 788 /* register fdevents after reset */ 789 for (uint32_t i = 0; i < srv->srv_sockets.used; ++i) { 790 server_socket *srv_socket = srv->srv_sockets.ptr[i]; 791 792 srv_socket->fdn = fdevent_register(srv->ev, srv_socket->fd, network_server_handle_fdevent, srv_socket); 793 fdevent_fdnode_event_set(srv->ev, srv_socket->fdn, FDEVENT_IN); 794 } 795 return 0; 796 } 797