| 1 |
/* |
| 2 |
* Hydra, an http server (based on Boa 0.94.13) |
| 3 |
* Copyright (C) 1995 Paul Phillips <paulp@go2net.com> |
| 4 |
* Some changes Copyright (C) 1996 Charles F. Randall <crandall@goldsys.com> |
| 5 |
* Some changes Copyright (C) 1996 Larry Doolittle <ldoolitt@boa.org> |
| 6 |
* Some changes Copyright (C) 1996-2002 Jon Nelson <jnelson@boa.org> |
| 7 |
* Portions Copyright (C) 2002 Nikos Mavroyanopoulos <nmav@gnutls.org> |
| 8 |
* |
| 9 |
* This program is free software; you can redistribute it and/or modify |
| 10 |
* it under the terms of the GNU General Public License as published by |
| 11 |
* the Free Software Foundation; either version 1, or (at your option) |
| 12 |
* any later version. |
| 13 |
* |
| 14 |
* This program is distributed in the hope that it will be useful, |
| 15 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 |
* GNU General Public License for more details. |
| 18 |
* |
| 19 |
* You should have received a copy of the GNU General Public License |
| 20 |
* along with this program; if not, write to the Free Software |
| 21 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 |
* |
| 23 |
*/ |
| 24 |
|
| 25 |
/* $Id: boa.c,v 1.15 2002/09/30 17:16:54 nmav Exp $*/ |
| 26 |
|
| 27 |
#include "boa.h" |
| 28 |
#include "ssl.h" |
| 29 |
#include <sys/resource.h> |
| 30 |
#ifdef ENABLE_SMP |
| 31 |
pthread_t father_id; |
| 32 |
#endif |
| 33 |
|
| 34 |
extern int ssl_params_refresh; |
| 35 |
|
| 36 |
/* globals */ |
| 37 |
int backlog = SO_MAXCONN; |
| 38 |
time_t start_time; |
| 39 |
|
| 40 |
time_t current_time; |
| 41 |
|
| 42 |
|
| 43 |
/* static to boa.c */ |
| 44 |
static void fixup_server_root(void); |
| 45 |
static socket_type create_server_socket(int port, int); |
| 46 |
void hic_init(void); |
| 47 |
static void drop_privs(void); |
| 48 |
static server_params *smp_init(socket_type server_s[2]); |
| 49 |
static void create_server_names( void); |
| 50 |
|
| 51 |
static int sock_opt = 1; |
| 52 |
static int do_fork = 1; |
| 53 |
int devnullfd = -1; |
| 54 |
|
| 55 |
int main(int argc, char **argv) |
| 56 |
{ |
| 57 |
int c; /* command line arg */ |
| 58 |
socket_type server_s[2] = { {-1, 0, 0, 0}, {-1, -1, 0, 0} }; /* boa socket */ |
| 59 |
server_params *params; |
| 60 |
|
| 61 |
/* set umask to u+rw, u-x, go-rwx */ |
| 62 |
c = umask(~0600); |
| 63 |
if (c == -1) { |
| 64 |
perror("umask"); |
| 65 |
exit(1); |
| 66 |
} |
| 67 |
|
| 68 |
devnullfd = open("/dev/null", 0); |
| 69 |
|
| 70 |
/* make STDIN and STDOUT point to /dev/null */ |
| 71 |
if (devnullfd == -1) { |
| 72 |
DIE("can't open /dev/null"); |
| 73 |
} |
| 74 |
|
| 75 |
if (dup2(devnullfd, STDIN_FILENO) == -1) { |
| 76 |
DIE("can't dup2 /dev/null to STDIN_FILENO"); |
| 77 |
} |
| 78 |
|
| 79 |
if (dup2(devnullfd, STDOUT_FILENO) == -1) { |
| 80 |
DIE("can't dup2 /dev/null to STDOUT_FILENO"); |
| 81 |
} |
| 82 |
|
| 83 |
/* but first, update timestamp, because log_error_time uses it */ |
| 84 |
(void) time(¤t_time); |
| 85 |
|
| 86 |
while ((c = getopt(argc, argv, "c:r:d")) != -1) { |
| 87 |
switch (c) { |
| 88 |
case 'c': |
| 89 |
if (server_root) |
| 90 |
free(server_root); |
| 91 |
server_root = strdup(optarg); |
| 92 |
if (!server_root) { |
| 93 |
perror("strdup (for server_root)"); |
| 94 |
exit(1); |
| 95 |
} |
| 96 |
break; |
| 97 |
case 'r': |
| 98 |
if (chdir(optarg) == -1) { |
| 99 |
log_error_time(); |
| 100 |
perror("chdir (to chroot)"); |
| 101 |
exit(1); |
| 102 |
} |
| 103 |
if (chroot(optarg) == -1) { |
| 104 |
log_error_time(); |
| 105 |
perror("chroot"); |
| 106 |
exit(1); |
| 107 |
} |
| 108 |
if (chdir("/") == -1) { |
| 109 |
log_error_time(); |
| 110 |
perror("chdir (after chroot)"); |
| 111 |
exit(1); |
| 112 |
} |
| 113 |
break; |
| 114 |
case 'd': |
| 115 |
do_fork = 0; |
| 116 |
break; |
| 117 |
default: |
| 118 |
fprintf(stderr, "Usage: %s [-c serverroot] [-r chroot] [-d]\n", |
| 119 |
argv[0]); |
| 120 |
exit(1); |
| 121 |
} |
| 122 |
} |
| 123 |
|
| 124 |
create_server_names(); |
| 125 |
fixup_server_root(); |
| 126 |
read_config_files(); |
| 127 |
open_logs(); |
| 128 |
|
| 129 |
if ((boa_ssl >= 2 || boa_ssl == 0) && server_port > 0) { |
| 130 |
server_s[0] = create_server_socket(server_port, 0); |
| 131 |
} |
| 132 |
|
| 133 |
if (boa_ssl != 0 && ssl_port > 0) { |
| 134 |
server_s[1] = create_server_socket(ssl_port, 1); |
| 135 |
} |
| 136 |
|
| 137 |
if (server_s[1].socket == -1 && server_s[0].socket == -1) { |
| 138 |
log_error_time(); |
| 139 |
fprintf(stderr, "Could not initialize sockets\n"); |
| 140 |
exit(1); |
| 141 |
} |
| 142 |
|
| 143 |
init_signals(); |
| 144 |
drop_privs(); |
| 145 |
create_common_env(); |
| 146 |
build_needs_escape(); |
| 147 |
|
| 148 |
#ifdef ENABLE_SSL |
| 149 |
if (boa_ssl) { |
| 150 |
initialize_ssl(); |
| 151 |
} |
| 152 |
#endif |
| 153 |
|
| 154 |
initialize_mmap(); |
| 155 |
|
| 156 |
if (max_connections < 1) { |
| 157 |
struct rlimit rl; |
| 158 |
|
| 159 |
/* has not been set explicitly */ |
| 160 |
c = getrlimit(RLIMIT_NOFILE, &rl); |
| 161 |
if (c < 0) { |
| 162 |
perror("getrlimit"); |
| 163 |
exit(1); |
| 164 |
} |
| 165 |
max_connections = rl.rlim_cur; |
| 166 |
} |
| 167 |
|
| 168 |
/* background ourself */ |
| 169 |
if (do_fork) { |
| 170 |
switch (fork()) { |
| 171 |
case -1: |
| 172 |
/* error */ |
| 173 |
perror("fork"); |
| 174 |
exit(1); |
| 175 |
break; |
| 176 |
case 0: |
| 177 |
/* child, success */ |
| 178 |
break; |
| 179 |
default: |
| 180 |
/* parent, success */ |
| 181 |
exit(0); |
| 182 |
break; |
| 183 |
} |
| 184 |
} |
| 185 |
|
| 186 |
/* main loop */ |
| 187 |
timestamp(); |
| 188 |
|
| 189 |
start_time = current_time; |
| 190 |
|
| 191 |
/* Blocks signals that are not supposed to be catched |
| 192 |
* by the children. |
| 193 |
*/ |
| 194 |
block_main_signals(); |
| 195 |
|
| 196 |
#ifdef ENABLE_HIC |
| 197 |
hic_init(); |
| 198 |
#endif |
| 199 |
|
| 200 |
/* spawn the children pool |
| 201 |
*/ |
| 202 |
params = smp_init(server_s); |
| 203 |
|
| 204 |
/* unblock signals for daddy |
| 205 |
*/ |
| 206 |
unblock_main_signals(); |
| 207 |
|
| 208 |
/* regenerate parameters in that time interval |
| 209 |
*/ |
| 210 |
#ifdef ENABLE_SSL |
| 211 |
if (boa_ssl) { |
| 212 |
if (ssl_params_refresh < DEFAULT_SSL_PARAMS_REFRESH) { |
| 213 |
log_error_time(); |
| 214 |
fprintf(stderr, |
| 215 |
"SSL parameters will be refreshed every %d minutes\n", |
| 216 |
DEFAULT_SSL_PARAMS_REFRESH / 60); |
| 217 |
ssl_params_refresh = DEFAULT_SSL_PARAMS_REFRESH; |
| 218 |
} |
| 219 |
alarm(ssl_params_refresh); |
| 220 |
} |
| 221 |
#endif |
| 222 |
|
| 223 |
select_loop(params); |
| 224 |
|
| 225 |
return 0; |
| 226 |
} |
| 227 |
|
| 228 |
server_params *global_server_params; |
| 229 |
int global_server_params_size = 0; |
| 230 |
|
| 231 |
#ifdef ENABLE_HIC |
| 232 |
hic_params *global_hic_params = NULL; |
| 233 |
int global_hic_params_size = 0; |
| 234 |
#endif |
| 235 |
|
| 236 |
/* This function will return a server_params pointer. This |
| 237 |
* pointer is to be used as a pointer to the select loop. |
| 238 |
*/ |
| 239 |
static server_params *smp_init(socket_type server_s[2]) |
| 240 |
{ |
| 241 |
int i; |
| 242 |
server_params *params; |
| 243 |
|
| 244 |
#ifdef ENABLE_SMP |
| 245 |
pthread_t tid; |
| 246 |
int max_threads = max_server_threads; |
| 247 |
|
| 248 |
father_id = pthread_self(); |
| 249 |
#else |
| 250 |
const int max_threads = 1; |
| 251 |
#endif |
| 252 |
|
| 253 |
params = malloc(sizeof(server_params) * max_threads); |
| 254 |
if (params == NULL) { |
| 255 |
log_error_time(); |
| 256 |
fprintf(stderr, "Could not allocate memory.\n"); |
| 257 |
exit(1); |
| 258 |
} |
| 259 |
|
| 260 |
for (i = 0; i < max_threads; i++) { |
| 261 |
params[i].server_s[0] = server_s[0]; |
| 262 |
params[i].server_s[1] = server_s[1]; |
| 263 |
params[i].request_ready = NULL; |
| 264 |
params[i].request_block = NULL; |
| 265 |
params[i].request_free = NULL; |
| 266 |
|
| 267 |
/* for signal handling */ |
| 268 |
params[i].sighup_flag = 0; |
| 269 |
params[i].sigchld_flag = 0; |
| 270 |
params[i].sigalrm_flag = 0; |
| 271 |
params[i].sigusr1_flag = 0; |
| 272 |
params[i].sigterm_flag = 0; |
| 273 |
|
| 274 |
params[i].sockbufsize = SOCKETBUF_SIZE; |
| 275 |
|
| 276 |
params[i].status.requests = 0; |
| 277 |
params[i].status.errors = 0; |
| 278 |
|
| 279 |
params[i].total_connections = 0; |
| 280 |
params[i].max_fd = 0; |
| 281 |
|
| 282 |
params[i].handle_sigbus = 0; |
| 283 |
} |
| 284 |
|
| 285 |
#ifdef ENABLE_SMP |
| 286 |
params[0].tid = father_id; |
| 287 |
|
| 288 |
for (i = 1; i < max_threads; i++) { |
| 289 |
if (pthread_create(&tid, NULL, &select_loop, ¶ms[i]) != 0) { |
| 290 |
log_error_time(); |
| 291 |
fprintf(stderr, "Could not dispatch threads.\n"); |
| 292 |
exit(1); |
| 293 |
} |
| 294 |
params[i].tid = tid; |
| 295 |
} |
| 296 |
#endif |
| 297 |
|
| 298 |
if (max_threads > 1) { |
| 299 |
log_error_time(); |
| 300 |
fprintf(stderr, |
| 301 |
"%s: Dispatched %d HTTP server threads.\n", SERVER_NAME, |
| 302 |
max_threads); |
| 303 |
} |
| 304 |
|
| 305 |
global_server_params_size = max_threads; |
| 306 |
global_server_params = params; |
| 307 |
|
| 308 |
return ¶ms[0]; |
| 309 |
} |
| 310 |
|
| 311 |
void smp_reinit() |
| 312 |
{ |
| 313 |
#ifdef ENABLE_SMP |
| 314 |
int i; |
| 315 |
server_params *params = global_server_params; |
| 316 |
int max_threads = max_server_threads; |
| 317 |
#else |
| 318 |
int max_threads = 1; |
| 319 |
#endif |
| 320 |
|
| 321 |
if (global_server_params_size < max_threads) { |
| 322 |
log_error_time(); |
| 323 |
fprintf(stderr, "Cannot increase threads on runtime.\n"); |
| 324 |
max_threads = global_server_params_size; |
| 325 |
} |
| 326 |
#ifdef ENABLE_SMP |
| 327 |
for (i = 1; i < max_threads; i++) { |
| 328 |
pthread_t tid; |
| 329 |
if (pthread_create(&tid, NULL, &select_loop, ¶ms[i]) != 0) { |
| 330 |
log_error_time(); |
| 331 |
fprintf(stderr, "Could not dispatch threads.\n"); |
| 332 |
exit(1); |
| 333 |
} |
| 334 |
params[i].tid = tid; |
| 335 |
} |
| 336 |
#endif |
| 337 |
|
| 338 |
if (max_threads > 0) { |
| 339 |
log_error_time(); |
| 340 |
fprintf(stderr, "Regenerated a pool of %d threads.\n", max_threads); |
| 341 |
} |
| 342 |
|
| 343 |
return; |
| 344 |
} |
| 345 |
|
| 346 |
#ifdef ENABLE_HIC |
| 347 |
|
| 348 |
pthread_t hic_tid; |
| 349 |
|
| 350 |
/* This function will return a server_params pointer. This |
| 351 |
* pointer is to be used as a pointer to the select loop. |
| 352 |
*/ |
| 353 |
void hic_init() |
| 354 |
{ |
| 355 |
hic_params *params = global_hic_params; |
| 356 |
int i; |
| 357 |
#ifdef ENABLE_SMP |
| 358 |
pthread_t tid; |
| 359 |
#endif |
| 360 |
|
| 361 |
if (max_hic_threads == 0) |
| 362 |
return; |
| 363 |
|
| 364 |
#ifdef ENABLE_SMP |
| 365 |
|
| 366 |
if (global_hic_params_size > 0 |
| 367 |
&& global_hic_params_size != max_hic_threads) { |
| 368 |
log_error_time(); |
| 369 |
fprintf(stderr, |
| 370 |
"Cannot change the HIC threads number on runtime.\n"); |
| 371 |
max_hic_threads = global_hic_params_size; |
| 372 |
} else { |
| 373 |
/* first time.. Allocate memory */ |
| 374 |
params = calloc(1, sizeof(hic_params) * max_hic_threads); |
| 375 |
if (params == NULL) { |
| 376 |
log_error_time(); |
| 377 |
fprintf(stderr, |
| 378 |
"Could not allocate memory for HIC parameters.\n"); |
| 379 |
exit(1); |
| 380 |
} |
| 381 |
|
| 382 |
for (i = 0; i < max_hic_threads; i++) { /* initialize mutexes */ |
| 383 |
pthread_mutex_init(¶ms[i].lock, NULL); |
| 384 |
} |
| 385 |
|
| 386 |
global_hic_params = params; |
| 387 |
global_hic_params_size = max_hic_threads; |
| 388 |
|
| 389 |
} |
| 390 |
|
| 391 |
for (i = 0; i < max_hic_threads; i++) { |
| 392 |
if (pthread_create(&tid, NULL, &hic_main_loop, ¶ms[i]) != 0) { |
| 393 |
log_error_time(); |
| 394 |
fprintf(stderr, "Could not dispatch hic thread.\n"); |
| 395 |
exit(1); |
| 396 |
} |
| 397 |
params[i].tid = tid; |
| 398 |
} |
| 399 |
|
| 400 |
log_error_time(); |
| 401 |
fprintf(stderr, |
| 402 |
"%s: Dispatched %d HIC threads.\n", SERVER_NAME, |
| 403 |
max_hic_threads); |
| 404 |
|
| 405 |
#endif |
| 406 |
|
| 407 |
return; |
| 408 |
} |
| 409 |
|
| 410 |
#endif /* ENABLE_HIC */ |
| 411 |
|
| 412 |
static socket_type create_server_socket(int port, int secure) |
| 413 |
{ |
| 414 |
socket_type server_s; |
| 415 |
|
| 416 |
server_s.secure = secure; |
| 417 |
server_s.port = port; |
| 418 |
|
| 419 |
server_s.socket = socket(SERVER_AF, SOCK_STREAM, IPPROTO_TCP); |
| 420 |
if (server_s.socket == -1) { |
| 421 |
DIE("unable to create socket"); |
| 422 |
} |
| 423 |
|
| 424 |
/* server socket is nonblocking */ |
| 425 |
if (set_nonblock_fd(server_s.socket) == -1) { |
| 426 |
DIE("fcntl: unable to set server socket to nonblocking"); |
| 427 |
} |
| 428 |
|
| 429 |
/* close server socket on exec so cgi's can't write to it */ |
| 430 |
if (fcntl(server_s.socket, F_SETFD, 1) == -1) { |
| 431 |
DIE("can't set close-on-exec on server socket!"); |
| 432 |
} |
| 433 |
|
| 434 |
/* reuse socket addr */ |
| 435 |
if ((setsockopt |
| 436 |
(server_s.socket, SOL_SOCKET, SO_REUSEADDR, (void *) &sock_opt, |
| 437 |
sizeof(sock_opt))) == -1) { |
| 438 |
DIE("setsockopt"); |
| 439 |
} |
| 440 |
|
| 441 |
/* internet family-specific code encapsulated in bind_server() */ |
| 442 |
if (bind_server(server_s.socket, server_ip, port) == -1) { |
| 443 |
DIE("unable to bind"); |
| 444 |
} |
| 445 |
|
| 446 |
/* listen: large number just in case your kernel is nicely tweaked */ |
| 447 |
if (listen(server_s.socket, backlog) == -1) { |
| 448 |
DIE("unable to listen"); |
| 449 |
} |
| 450 |
return server_s; |
| 451 |
} |
| 452 |
|
| 453 |
static void drop_privs(void) |
| 454 |
{ |
| 455 |
/* give away our privs if we can */ |
| 456 |
if (getuid() == 0) { |
| 457 |
struct passwd *passwdbuf; |
| 458 |
passwdbuf = getpwuid(server_uid); |
| 459 |
if (passwdbuf == NULL) { |
| 460 |
DIE("getpwuid"); |
| 461 |
} |
| 462 |
if (initgroups(passwdbuf->pw_name, passwdbuf->pw_gid) == -1) { |
| 463 |
DIE("initgroups"); |
| 464 |
} |
| 465 |
if (setgid(server_gid) == -1) { |
| 466 |
DIE("setgid"); |
| 467 |
} |
| 468 |
if (setuid(server_uid) == -1) { |
| 469 |
DIE("setuid"); |
| 470 |
} |
| 471 |
/* test for failed-but-return-was-successful setuid |
| 472 |
* http://www.securityportal.com/list-archive/bugtraq/2000/Jun/0101.html |
| 473 |
*/ |
| 474 |
if (setuid(0) != -1) { |
| 475 |
DIE("icky Linux kernel bug!"); |
| 476 |
} |
| 477 |
} else { |
| 478 |
if (server_gid || server_uid) { |
| 479 |
log_error_time(); |
| 480 |
fprintf(stderr, "Warning: " |
| 481 |
"Not running as root: no attempt to change" |
| 482 |
" to uid %d gid %d\n", server_uid, server_gid); |
| 483 |
} |
| 484 |
server_gid = getgid(); |
| 485 |
server_uid = getuid(); |
| 486 |
} |
| 487 |
} |
| 488 |
|
| 489 |
/* |
| 490 |
* Name: fixup_server_root |
| 491 |
* |
| 492 |
* Description: Makes sure the server root is valid. |
| 493 |
* |
| 494 |
*/ |
| 495 |
|
| 496 |
static void fixup_server_root() |
| 497 |
{ |
| 498 |
char *dirbuf; |
| 499 |
|
| 500 |
if (!server_root) { |
| 501 |
#ifdef SERVER_ROOT |
| 502 |
server_root = strdup(SERVER_ROOT); |
| 503 |
if (!server_root) { |
| 504 |
perror("strdup (SERVER_ROOT)"); |
| 505 |
exit(1); |
| 506 |
} |
| 507 |
#else |
| 508 |
fputs(SERVER_NAME |
| 509 |
": don't know where server root is. Please #define " |
| 510 |
"SERVER_ROOT in defines.h\n" |
| 511 |
"and recompile, or use the -c command line option to " |
| 512 |
"specify it.\n", stderr); |
| 513 |
exit(1); |
| 514 |
#endif |
| 515 |
} |
| 516 |
|
| 517 |
if (chdir(server_root) == -1) { |
| 518 |
fprintf(stderr, "Could not chdir to \"%s\": aborting\n", |
| 519 |
server_root); |
| 520 |
exit(1); |
| 521 |
} |
| 522 |
|
| 523 |
dirbuf = normalize_path(server_root); |
| 524 |
free(server_root); |
| 525 |
server_root = dirbuf; |
| 526 |
} |
| 527 |
|
| 528 |
char boa_tls_version[64] = "\0"; |
| 529 |
char boa_version[] = "Server: "SERVER_NAME"/"SERVER_VERSION"\r\n"; |
| 530 |
|
| 531 |
static void create_server_names() |
| 532 |
{ |
| 533 |
if ( boa_tls_version[0] == 0) { |
| 534 |
strcpy( boa_tls_version, "Server: "SERVER_NAME"/"SERVER_VERSION" GnuTLS/"); |
| 535 |
strcat( boa_tls_version, gnutls_check_version(NULL)); |
| 536 |
strcat( boa_tls_version, "\r\n"); |
| 537 |
} |
| 538 |
} |
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