| 1 | /* |
| 2 | ashd - A Sane HTTP Daemon |
| 3 | Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com> |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * XXX: This program is mostly copied from callscgi. It may be |
| 21 | * reasonable to unify some of their shared code in a source file. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * XXX: All the various ways to start a child process makes this |
| 26 | * program quite ugly at the moment. It is unclear whether it is |
| 27 | * meaningfully possible to unify them better than they currently are. |
| 28 | */ |
| 29 | |
| 30 | #include <stdlib.h> |
| 31 | #include <stdio.h> |
| 32 | #include <unistd.h> |
| 33 | #include <string.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <ctype.h> |
| 36 | #include <sys/socket.h> |
| 37 | #include <sys/un.h> |
| 38 | #include <netinet/in.h> |
| 39 | #include <netdb.h> |
| 40 | #include <sys/signal.h> |
| 41 | #include <errno.h> |
| 42 | |
| 43 | #ifdef HAVE_CONFIG_H |
| 44 | #include <config.h> |
| 45 | #endif |
| 46 | #include <utils.h> |
| 47 | #include <req.h> |
| 48 | #include <log.h> |
| 49 | #include <mt.h> |
| 50 | #include <mtio.h> |
| 51 | |
| 52 | #define FCGI_BEGIN_REQUEST 1 |
| 53 | #define FCGI_ABORT_REQUEST 2 |
| 54 | #define FCGI_END_REQUEST 3 |
| 55 | #define FCGI_PARAMS 4 |
| 56 | #define FCGI_STDIN 5 |
| 57 | #define FCGI_STDOUT 6 |
| 58 | #define FCGI_STDERR 7 |
| 59 | |
| 60 | static char **progspec; |
| 61 | static char *sockid, *unspec, *inspec; |
| 62 | static int nolisten; |
| 63 | static struct sockaddr *curaddr; |
| 64 | static size_t caddrlen; |
| 65 | static int cafamily, isanon; |
| 66 | static pid_t child; |
| 67 | |
| 68 | static struct addrinfo *resolv(int flags) |
| 69 | { |
| 70 | int ret; |
| 71 | struct addrinfo *ai, h; |
| 72 | char *name, *srv, *p; |
| 73 | |
| 74 | if((p = strchr(inspec, ':')) != NULL) { |
| 75 | name = smalloc(p - inspec + 1); |
| 76 | memcpy(name, inspec, p - inspec); |
| 77 | name[p - inspec] = 0; |
| 78 | srv = p + 1; |
| 79 | } else { |
| 80 | name = sstrdup("localhost"); |
| 81 | srv = inspec; |
| 82 | } |
| 83 | memset(&h, 0, sizeof(h)); |
| 84 | h.ai_family = AF_UNSPEC; |
| 85 | h.ai_socktype = SOCK_STREAM; |
| 86 | h.ai_flags = flags; |
| 87 | ret = getaddrinfo(name, srv, &h, &ai); |
| 88 | free(name); |
| 89 | if(ret != 0) { |
| 90 | flog(LOG_ERR, "could not resolve TCP specification `%s': %s", inspec, gai_strerror(ret)); |
| 91 | exit(1); |
| 92 | } |
| 93 | return(ai); |
| 94 | } |
| 95 | |
| 96 | static char *mksockid(char *sockid) |
| 97 | { |
| 98 | char *home; |
| 99 | |
| 100 | home = getenv("HOME"); |
| 101 | if(home && !access(sprintf3("%s/.ashd/sockets/", home), X_OK)) |
| 102 | return(sprintf3("%s/.ashd/sockets/fcgi-p-%s", home, sockid)); |
| 103 | return(sprintf3("/tmp/fcgi-%i-%s", getuid(), sockid)); |
| 104 | } |
| 105 | |
| 106 | static char *mkanonid(void) |
| 107 | { |
| 108 | char *home; |
| 109 | char *tmpl; |
| 110 | int fd; |
| 111 | |
| 112 | home = getenv("HOME"); |
| 113 | if(home && !access(sprintf3("%s/.ashd/sockets/", home), X_OK)) |
| 114 | tmpl = sprintf2("%s/.ashd/sockets/fcgi-a-XXXXXX", home); |
| 115 | else |
| 116 | tmpl = sprintf2("/tmp/fcgi-a-%i-XXXXXX", getuid()); |
| 117 | if((fd = mkstemp(tmpl)) < 0) { |
| 118 | flog(LOG_ERR, "could not create anonymous socket `%s': %s", tmpl, strerror(errno)); |
| 119 | exit(1); |
| 120 | } |
| 121 | close(fd); |
| 122 | unlink(tmpl); |
| 123 | return(tmpl); |
| 124 | } |
| 125 | |
| 126 | static void startlisten(void) |
| 127 | { |
| 128 | int i, fd; |
| 129 | struct addrinfo *ai, *cai; |
| 130 | char *unpath; |
| 131 | struct sockaddr_un unm; |
| 132 | char *aname; |
| 133 | |
| 134 | isanon = 0; |
| 135 | if(inspec != NULL) { |
| 136 | fd = -1; |
| 137 | for(cai = ai = resolv(AI_PASSIVE); cai != NULL; cai = cai->ai_next) { |
| 138 | if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0) |
| 139 | continue; |
| 140 | if(bind(fd, cai->ai_addr, cai->ai_addrlen)) { |
| 141 | close(fd); |
| 142 | fd = -1; |
| 143 | continue; |
| 144 | } |
| 145 | if(listen(fd, 128)) { |
| 146 | close(fd); |
| 147 | fd = -1; |
| 148 | continue; |
| 149 | } |
| 150 | break; |
| 151 | } |
| 152 | freeaddrinfo(ai); |
| 153 | if(fd < 0) { |
| 154 | flog(LOG_ERR, "could not bind to specified TCP address: %s", strerror(errno)); |
| 155 | exit(1); |
| 156 | } |
| 157 | } else if((unspec != NULL) || (sockid != NULL)) { |
| 158 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { |
| 159 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); |
| 160 | exit(1); |
| 161 | } |
| 162 | if(unspec != NULL) |
| 163 | unpath = unspec; |
| 164 | else |
| 165 | unpath = mksockid(sockid); |
| 166 | unlink(unpath); |
| 167 | unm.sun_family = AF_UNIX; |
| 168 | strcpy(unm.sun_path, unpath); |
| 169 | if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) { |
| 170 | flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno)); |
| 171 | exit(1); |
| 172 | } |
| 173 | if(listen(fd, 128)) { |
| 174 | flog(LOG_ERR, "listen: %s", strerror(errno)); |
| 175 | exit(1); |
| 176 | } |
| 177 | } else { |
| 178 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { |
| 179 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); |
| 180 | exit(1); |
| 181 | } |
| 182 | memset(&unm, 0, sizeof(unm)); |
| 183 | aname = mkanonid(); |
| 184 | unm.sun_family = AF_UNIX; |
| 185 | strcpy(unm.sun_path, aname); |
| 186 | free(aname); |
| 187 | if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) { |
| 188 | flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno)); |
| 189 | exit(1); |
| 190 | } |
| 191 | if(listen(fd, 128)) { |
| 192 | flog(LOG_ERR, "listen: %s", strerror(errno)); |
| 193 | exit(1); |
| 194 | } |
| 195 | |
| 196 | curaddr = smalloc(caddrlen = sizeof(unm)); |
| 197 | memcpy(curaddr, &unm, sizeof(unm)); |
| 198 | cafamily = AF_UNIX; |
| 199 | isanon = 1; |
| 200 | } |
| 201 | if((child = fork()) < 0) { |
| 202 | flog(LOG_ERR, "could not fork: %s", strerror(errno)); |
| 203 | exit(1); |
| 204 | } |
| 205 | if(child == 0) { |
| 206 | dup2(fd, 0); |
| 207 | for(i = 3; i < FD_SETSIZE; i++) |
| 208 | close(i); |
| 209 | execvp(*progspec, progspec); |
| 210 | flog(LOG_ERR, "callfcgi: %s: %s", *progspec, strerror(errno)); |
| 211 | _exit(127); |
| 212 | } |
| 213 | close(fd); |
| 214 | } |
| 215 | |
| 216 | static void startnolisten(void) |
| 217 | { |
| 218 | int i, fd; |
| 219 | |
| 220 | if((child = fork()) < 0) { |
| 221 | flog(LOG_ERR, "could not fork: %s", strerror(errno)); |
| 222 | exit(1); |
| 223 | } |
| 224 | if(child == 0) { |
| 225 | for(i = 3; i < FD_SETSIZE; i++) |
| 226 | close(i); |
| 227 | if((fd = open("/dev/null", O_RDONLY)) < 0) { |
| 228 | flog(LOG_ERR, "/dev/null: %s", strerror(errno)); |
| 229 | _exit(127); |
| 230 | } |
| 231 | dup2(fd, 0); |
| 232 | close(fd); |
| 233 | execvp(*progspec, progspec); |
| 234 | flog(LOG_ERR, "callfcgi: %s: %s", *progspec, strerror(errno)); |
| 235 | _exit(127); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | static int sconnect(void) |
| 240 | { |
| 241 | int fd; |
| 242 | int err; |
| 243 | socklen_t errlen; |
| 244 | |
| 245 | fd = socket(cafamily, SOCK_STREAM, 0); |
| 246 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
| 247 | while(1) { |
| 248 | if(connect(fd, curaddr, caddrlen)) { |
| 249 | if(errno == EINPROGRESS) { |
| 250 | block(fd, EV_WRITE, 30); |
| 251 | errlen = sizeof(err); |
| 252 | if(getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &errlen) || ((errno = err) != 0)) { |
| 253 | close(fd); |
| 254 | return(-1); |
| 255 | } |
| 256 | return(fd); |
| 257 | } |
| 258 | close(fd); |
| 259 | return(-1); |
| 260 | } |
| 261 | return(fd); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | static int econnect(void) |
| 266 | { |
| 267 | int fd; |
| 268 | struct addrinfo *ai, *cai; |
| 269 | int tries; |
| 270 | char *unpath; |
| 271 | struct sockaddr_un unm; |
| 272 | |
| 273 | tries = 0; |
| 274 | retry: |
| 275 | if(inspec != NULL) { |
| 276 | fd = -1; |
| 277 | for(cai = ai = resolv(0); cai != NULL; cai = cai->ai_next) { |
| 278 | if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0) |
| 279 | continue; |
| 280 | if(connect(fd, cai->ai_addr, cai->ai_addrlen)) { |
| 281 | close(fd); |
| 282 | fd = -1; |
| 283 | continue; |
| 284 | } |
| 285 | break; |
| 286 | } |
| 287 | if(fd < 0) { |
| 288 | if(tries++ < nolisten) { |
| 289 | sleep(1); |
| 290 | goto retry; |
| 291 | } |
| 292 | flog(LOG_ERR, "could not connect to specified TCP address: %s", strerror(errno)); |
| 293 | exit(1); |
| 294 | } |
| 295 | curaddr = smalloc(caddrlen = cai->ai_addrlen); |
| 296 | memcpy(curaddr, cai->ai_addr, caddrlen); |
| 297 | cafamily = cai->ai_family; |
| 298 | isanon = 0; |
| 299 | freeaddrinfo(ai); |
| 300 | return(fd); |
| 301 | } else if((unspec != NULL) || (sockid != NULL)) { |
| 302 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { |
| 303 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); |
| 304 | exit(1); |
| 305 | } |
| 306 | if(unspec != NULL) |
| 307 | unpath = unspec; |
| 308 | else |
| 309 | unpath = mksockid(sockid); |
| 310 | unlink(unpath); |
| 311 | unm.sun_family = AF_UNIX; |
| 312 | strcpy(unm.sun_path, unpath); |
| 313 | if(connect(fd, (struct sockaddr *)&unm, sizeof(unm))) { |
| 314 | close(fd); |
| 315 | if(tries++ < nolisten) { |
| 316 | sleep(1); |
| 317 | goto retry; |
| 318 | } |
| 319 | flog(LOG_ERR, "could not connect to Unix socket `%s': %s", unspec, strerror(errno)); |
| 320 | exit(1); |
| 321 | } |
| 322 | curaddr = smalloc(caddrlen = sizeof(unm)); |
| 323 | memcpy(curaddr, &unm, sizeof(unm)); |
| 324 | cafamily = AF_UNIX; |
| 325 | isanon = 0; |
| 326 | return(fd); |
| 327 | } else { |
| 328 | flog(LOG_ERR, "callfcgi: cannot use an anonymous socket without a program to start"); |
| 329 | exit(1); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | static int startconn(void) |
| 334 | { |
| 335 | if(*progspec) { |
| 336 | if(nolisten == 0) |
| 337 | startlisten(); |
| 338 | else |
| 339 | startnolisten(); |
| 340 | } |
| 341 | if(curaddr != NULL) |
| 342 | return(sconnect()); |
| 343 | return(econnect()); |
| 344 | } |
| 345 | |
| 346 | static void killcuraddr(void) |
| 347 | { |
| 348 | if(curaddr == NULL) |
| 349 | return; |
| 350 | if(isanon) { |
| 351 | unlink(((struct sockaddr_un *)curaddr)->sun_path); |
| 352 | if(child > 0) |
| 353 | kill(child, SIGTERM); |
| 354 | } |
| 355 | free(curaddr); |
| 356 | curaddr = NULL; |
| 357 | } |
| 358 | |
| 359 | static int reconn(void) |
| 360 | { |
| 361 | int fd; |
| 362 | |
| 363 | if(curaddr != NULL) { |
| 364 | if((fd = sconnect()) >= 0) |
| 365 | return(fd); |
| 366 | killcuraddr(); |
| 367 | } |
| 368 | return(startconn()); |
| 369 | } |
| 370 | |
| 371 | static off_t passdata(FILE *in, FILE *out) |
| 372 | { |
| 373 | size_t read; |
| 374 | off_t total; |
| 375 | char buf[8192]; |
| 376 | |
| 377 | total = 0; |
| 378 | while(!feof(in)) { |
| 379 | read = fread(buf, 1, sizeof(buf), in); |
| 380 | if(ferror(in)) |
| 381 | return(-1); |
| 382 | if(fwrite(buf, 1, read, out) != read) |
| 383 | return(-1); |
| 384 | total += read; |
| 385 | } |
| 386 | return(total); |
| 387 | } |
| 388 | |
| 389 | static void bufcatkv(struct charbuf *dst, char *key, char *val) |
| 390 | { |
| 391 | size_t kl, vl; |
| 392 | |
| 393 | if((kl = strlen(key)) < 128) { |
| 394 | bufadd(*dst, kl); |
| 395 | } else { |
| 396 | bufadd(*dst, ((kl & 0x7f000000) >> 24) | 0x80); |
| 397 | bufadd(*dst, (kl & 0x00ff0000) >> 16); |
| 398 | bufadd(*dst, (kl & 0x0000ff00) >> 8); |
| 399 | bufadd(*dst, kl & 0x000000ff); |
| 400 | } |
| 401 | if((vl = strlen(val)) < 128) { |
| 402 | bufadd(*dst, vl); |
| 403 | } else { |
| 404 | bufadd(*dst, ((vl & 0x7f000000) >> 24) | 0x80); |
| 405 | bufadd(*dst, (vl & 0x00ff0000) >> 16); |
| 406 | bufadd(*dst, (vl & 0x0000ff00) >> 8); |
| 407 | bufadd(*dst, vl & 0x000000ff); |
| 408 | } |
| 409 | bufcat(*dst, key, kl); |
| 410 | bufcat(*dst, val, vl); |
| 411 | } |
| 412 | |
| 413 | static void bufaddenv(struct charbuf *dst, char *name, char *fmt, ...) |
| 414 | { |
| 415 | va_list args; |
| 416 | char *val = NULL; |
| 417 | |
| 418 | va_start(args, fmt); |
| 419 | val = vsprintf2(fmt, args); |
| 420 | va_end(args); |
| 421 | bufcatkv(dst, name, val); |
| 422 | free(val); |
| 423 | } |
| 424 | |
| 425 | static char *absolutify(char *file) |
| 426 | { |
| 427 | static int inited = 0; |
| 428 | static char cwd[1024]; |
| 429 | |
| 430 | if(*file != '/') { |
| 431 | if(!inited) { |
| 432 | getcwd(cwd, sizeof(cwd)); |
| 433 | inited = 1; |
| 434 | } |
| 435 | return(sprintf2("%s/%s", cwd, file)); |
| 436 | } |
| 437 | return(sstrdup(file)); |
| 438 | } |
| 439 | |
| 440 | /* Mostly copied from callcgi. */ |
| 441 | static void mkcgienv(struct hthead *req, struct charbuf *dst) |
| 442 | { |
| 443 | int i; |
| 444 | char *url, *pi, *tmp, *qp, *h, *p; |
| 445 | |
| 446 | bufaddenv(dst, "SERVER_SOFTWARE", "ashd/%s", VERSION); |
| 447 | bufaddenv(dst, "GATEWAY_INTERFACE", "CGI/1.1"); |
| 448 | bufaddenv(dst, "SERVER_PROTOCOL", "%s", req->ver); |
| 449 | bufaddenv(dst, "REQUEST_METHOD", "%s", req->method); |
| 450 | bufaddenv(dst, "REQUEST_URI", "%s", req->url); |
| 451 | url = sstrdup(req->url); |
| 452 | if((qp = strchr(url, '?')) != NULL) |
| 453 | *(qp++) = 0; |
| 454 | /* XXX: This is an ugly hack (I think), but though I can think of |
| 455 | * several alternatives, none seem to be better. */ |
| 456 | if(*req->rest && (strlen(url) >= strlen(req->rest)) && |
| 457 | !strcmp(req->rest, url + strlen(url) - strlen(req->rest))) { |
| 458 | url[strlen(url) - strlen(req->rest)] = 0; |
| 459 | } |
| 460 | if((pi = unquoteurl(req->rest)) == NULL) |
| 461 | pi = sstrdup(req->rest); |
| 462 | if(!strcmp(url, "/")) { |
| 463 | /* This seems to be normal CGI behavior, but see callcgi.c for |
| 464 | * details. */ |
| 465 | url[0] = 0; |
| 466 | pi = sprintf2("/%s", tmp = pi); |
| 467 | free(tmp); |
| 468 | } |
| 469 | bufaddenv(dst, "PATH_INFO", pi); |
| 470 | bufaddenv(dst, "SCRIPT_NAME", url); |
| 471 | bufaddenv(dst, "QUERY_STRING", "%s", qp?qp:""); |
| 472 | free(pi); |
| 473 | free(url); |
| 474 | if((h = getheader(req, "Host")) != NULL) |
| 475 | bufaddenv(dst, "SERVER_NAME", "%s", h); |
| 476 | if((h = getheader(req, "X-Ash-Server-Port")) != NULL) |
| 477 | bufaddenv(dst, "SERVER_PORT", "%s", h); |
| 478 | if((h = getheader(req, "X-Ash-Remote-User")) != NULL) |
| 479 | bufaddenv(dst, "REMOTE_USER", "%s", h); |
| 480 | if(((h = getheader(req, "X-Ash-Protocol")) != NULL) && !strcmp(h, "https")) |
| 481 | bufaddenv(dst, "HTTPS", "on"); |
| 482 | if((h = getheader(req, "X-Ash-Address")) != NULL) |
| 483 | bufaddenv(dst, "REMOTE_ADDR", "%s", h); |
| 484 | if((h = getheader(req, "Content-Type")) != NULL) |
| 485 | bufaddenv(dst, "CONTENT_TYPE", "%s", h); |
| 486 | if((h = getheader(req, "Content-Length")) != NULL) |
| 487 | bufaddenv(dst, "CONTENT_LENGTH", "%s", h); |
| 488 | else |
| 489 | bufaddenv(dst, "CONTENT_LENGTH", "0"); |
| 490 | if((h = getheader(req, "X-Ash-File")) != NULL) { |
| 491 | h = absolutify(h); |
| 492 | bufaddenv(dst, "SCRIPT_FILENAME", "%s", h); |
| 493 | free(h); |
| 494 | } |
| 495 | for(i = 0; i < req->noheaders; i++) { |
| 496 | h = sprintf2("HTTP_%s", req->headers[i][0]); |
| 497 | for(p = h; *p; p++) { |
| 498 | if(isalnum(*p)) |
| 499 | *p = toupper(*p); |
| 500 | else |
| 501 | *p = '_'; |
| 502 | } |
| 503 | bufcatkv(dst, h, req->headers[i][1]); |
| 504 | free(h); |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | static char *defstatus(int code) |
| 509 | { |
| 510 | if(code == 200) |
| 511 | return("OK"); |
| 512 | else if(code == 201) |
| 513 | return("Created"); |
| 514 | else if(code == 202) |
| 515 | return("Accepted"); |
| 516 | else if(code == 204) |
| 517 | return("No Content"); |
| 518 | else if(code == 300) |
| 519 | return("Multiple Choices"); |
| 520 | else if(code == 301) |
| 521 | return("Moved Permanently"); |
| 522 | else if(code == 302) |
| 523 | return("Found"); |
| 524 | else if(code == 303) |
| 525 | return("See Other"); |
| 526 | else if(code == 304) |
| 527 | return("Not Modified"); |
| 528 | else if(code == 307) |
| 529 | return("Moved Temporarily"); |
| 530 | else if(code == 400) |
| 531 | return("Bad Request"); |
| 532 | else if(code == 401) |
| 533 | return("Unauthorized"); |
| 534 | else if(code == 403) |
| 535 | return("Forbidden"); |
| 536 | else if(code == 404) |
| 537 | return("Not Found"); |
| 538 | else if(code == 500) |
| 539 | return("Internal Server Error"); |
| 540 | else if(code == 501) |
| 541 | return("Not Implemented"); |
| 542 | else if(code == 503) |
| 543 | return("Service Unavailable"); |
| 544 | else |
| 545 | return("Unknown status"); |
| 546 | } |
| 547 | |
| 548 | static struct hthead *parseresp(FILE *in) |
| 549 | { |
| 550 | struct hthead *resp; |
| 551 | char *st, *p; |
| 552 | |
| 553 | omalloc(resp); |
| 554 | resp->ver = sstrdup("HTTP/1.1"); |
| 555 | if(parseheaders(resp, in)) { |
| 556 | freehthead(resp); |
| 557 | return(NULL); |
| 558 | } |
| 559 | if((st = getheader(resp, "Status")) != NULL) { |
| 560 | if((p = strchr(st, ' ')) != NULL) { |
| 561 | *(p++) = 0; |
| 562 | resp->code = atoi(st); |
| 563 | resp->msg = sstrdup(p); |
| 564 | } else { |
| 565 | resp->code = atoi(st); |
| 566 | resp->msg = sstrdup(defstatus(resp->code)); |
| 567 | } |
| 568 | headrmheader(resp, "Status"); |
| 569 | } else if(getheader(resp, "Location")) { |
| 570 | resp->code = 303; |
| 571 | resp->msg = sstrdup("See Other"); |
| 572 | } else { |
| 573 | resp->code = 200; |
| 574 | resp->msg = sstrdup("OK"); |
| 575 | } |
| 576 | return(resp); |
| 577 | } |
| 578 | |
| 579 | #define fputc2(b, f) if(fputc((b), (f)) == EOF) return(-1); |
| 580 | |
| 581 | static int sendrec(FILE *out, int type, int rid, char *data, size_t dlen) |
| 582 | { |
| 583 | off_t off; |
| 584 | size_t cl; |
| 585 | int p; |
| 586 | |
| 587 | off = 0; |
| 588 | do { |
| 589 | cl = min(dlen - off, 65535); |
| 590 | p = (8 - (cl % 8)) % 8; |
| 591 | fputc2(1, out); |
| 592 | fputc2(type, out); |
| 593 | fputc2((rid & 0xff00) >> 8, out); |
| 594 | fputc2(rid & 0x00ff, out); |
| 595 | fputc2((cl & 0xff00) >> 8, out); |
| 596 | fputc2(cl & 0x00ff, out); |
| 597 | fputc2(p, out); |
| 598 | fputc2(0, out); |
| 599 | if(fwrite(data + off, 1, cl, out) != cl) |
| 600 | return(-1); |
| 601 | for(; p > 0; p--) |
| 602 | fputc2(0, out); |
| 603 | } while((off += cl) < dlen); |
| 604 | return(0); |
| 605 | } |
| 606 | |
| 607 | #define fgetc2(f) ({int __c__ = fgetc(f); if(__c__ == EOF) return(-1); __c__;}) |
| 608 | |
| 609 | static int recvrec(FILE *in, int *type, int *rid, char **data, size_t *dlen) |
| 610 | { |
| 611 | int b1, b2, pl; |
| 612 | |
| 613 | if(fgetc2(in) != 1) |
| 614 | return(-1); |
| 615 | *type = fgetc2(in); |
| 616 | b1 = fgetc2(in); |
| 617 | b2 = fgetc2(in); |
| 618 | *rid = (b1 << 8) | b2; |
| 619 | b1 = fgetc2(in); |
| 620 | b2 = fgetc2(in); |
| 621 | *dlen = (b1 << 8) | b2; |
| 622 | pl = fgetc2(in); |
| 623 | if(fgetc2(in) != 0) |
| 624 | return(-1); |
| 625 | *data = smalloc(max(*dlen, 1)); |
| 626 | if(fread(*data, 1, *dlen, in) != *dlen) { |
| 627 | free(*data); |
| 628 | return(-1); |
| 629 | } |
| 630 | for(; pl > 0; pl--) { |
| 631 | if(fgetc(in) == EOF) { |
| 632 | free(*data); |
| 633 | return(-1); |
| 634 | } |
| 635 | } |
| 636 | return(0); |
| 637 | } |
| 638 | |
| 639 | static int begreq(FILE *out, int rid) |
| 640 | { |
| 641 | char rec[] = {0, 1, 0, 0, 0, 0, 0, 0}; |
| 642 | |
| 643 | return(sendrec(out, FCGI_BEGIN_REQUEST, rid, rec, 8)); |
| 644 | } |
| 645 | |
| 646 | static void mtiopipe(FILE **read, FILE **write) |
| 647 | { |
| 648 | int fds[2]; |
| 649 | |
| 650 | pipe(fds); |
| 651 | *read = mtstdopen(fds[0], 0, 600, "r"); |
| 652 | *write = mtstdopen(fds[1], 0, 600, "w"); |
| 653 | } |
| 654 | |
| 655 | static void outplex(struct muth *muth, va_list args) |
| 656 | { |
| 657 | vavar(FILE *, sk); |
| 658 | struct { |
| 659 | struct ch { |
| 660 | FILE *s; |
| 661 | int id; |
| 662 | } *b; |
| 663 | size_t s, d; |
| 664 | } outs; |
| 665 | int i; |
| 666 | struct ch ch; |
| 667 | int type, rid; |
| 668 | char *data; |
| 669 | size_t dlen; |
| 670 | |
| 671 | bufinit(outs); |
| 672 | while((ch.s = va_arg(args, FILE *)) != NULL) { |
| 673 | ch.id = va_arg(args, int); |
| 674 | bufadd(outs, ch); |
| 675 | } |
| 676 | data = NULL; |
| 677 | while(1) { |
| 678 | if(recvrec(sk, &type, &rid, &data, &dlen)) |
| 679 | goto out; |
| 680 | if(rid != 1) |
| 681 | goto out; |
| 682 | for(i = 0; i < outs.d; i++) { |
| 683 | if(outs.b[i].id == type) { |
| 684 | if(outs.b[i].s != NULL) { |
| 685 | if(dlen == 0) { |
| 686 | fclose(outs.b[i].s); |
| 687 | outs.b[i].s = NULL; |
| 688 | } else { |
| 689 | if(fwrite(data, 1, dlen, outs.b[i].s) != dlen) |
| 690 | goto out; |
| 691 | } |
| 692 | } |
| 693 | break; |
| 694 | } |
| 695 | } |
| 696 | free(data); |
| 697 | data = NULL; |
| 698 | } |
| 699 | |
| 700 | out: |
| 701 | if(data != NULL) |
| 702 | free(data); |
| 703 | for(i = 0; i < outs.d; i++) { |
| 704 | if(outs.b[i].s != NULL) |
| 705 | fclose(outs.b[i].s); |
| 706 | } |
| 707 | buffree(outs); |
| 708 | fclose(sk); |
| 709 | } |
| 710 | |
| 711 | static void errhandler(struct muth *muth, va_list args) |
| 712 | { |
| 713 | vavar(FILE *, in); |
| 714 | char buf[1024]; |
| 715 | char *p; |
| 716 | |
| 717 | bufinit(buf); |
| 718 | while(fgets(buf, sizeof(buf), in) != NULL) { |
| 719 | p = buf + strlen(buf) - 1; |
| 720 | while((p >= buf) && (*p == '\n')) |
| 721 | *(p--) = 0; |
| 722 | if(buf[0]) |
| 723 | flog(LOG_INFO, "child said: %s", buf); |
| 724 | } |
| 725 | fclose(in); |
| 726 | } |
| 727 | |
| 728 | static void serve(struct muth *muth, va_list args) |
| 729 | { |
| 730 | vavar(struct hthead *, req); |
| 731 | vavar(int, fd); |
| 732 | vavar(int, sfd); |
| 733 | FILE *is, *os, *outi, *outo, *erri, *erro; |
| 734 | struct charbuf head; |
| 735 | struct hthead *resp; |
| 736 | size_t read; |
| 737 | char buf[8192]; |
| 738 | |
| 739 | sfd = reconn(); |
| 740 | is = mtstdopen(fd, 1, 60, "r+"); |
| 741 | os = mtstdopen(sfd, 1, 600, "r+"); |
| 742 | |
| 743 | outi = NULL; |
| 744 | mtiopipe(&outi, &outo); mtiopipe(&erri, &erro); |
| 745 | mustart(outplex, mtstdopen(dup(sfd), 1, 600, "r+"), outo, FCGI_STDOUT, erro, FCGI_STDERR, NULL); |
| 746 | mustart(errhandler, erri); |
| 747 | |
| 748 | if(begreq(os, 1)) |
| 749 | goto out; |
| 750 | bufinit(head); |
| 751 | mkcgienv(req, &head); |
| 752 | if(sendrec(os, FCGI_PARAMS, 1, head.b, head.d)) |
| 753 | goto out; |
| 754 | if(sendrec(os, FCGI_PARAMS, 1, NULL, 0)) |
| 755 | goto out; |
| 756 | buffree(head); |
| 757 | if(fflush(os)) |
| 758 | goto out; |
| 759 | |
| 760 | while(!feof(is)) { |
| 761 | read = fread(buf, 1, sizeof(buf), is); |
| 762 | if(ferror(is)) |
| 763 | goto out; |
| 764 | if(sendrec(os, FCGI_STDIN, 1, buf, read)) |
| 765 | goto out; |
| 766 | } |
| 767 | if(sendrec(os, FCGI_STDIN, 1, NULL, 0)) |
| 768 | goto out; |
| 769 | if(fflush(os)) |
| 770 | goto out; |
| 771 | |
| 772 | if((resp = parseresp(outi)) == NULL) |
| 773 | goto out; |
| 774 | writeresp(is, resp); |
| 775 | freehthead(resp); |
| 776 | fputc('\n', is); |
| 777 | if(passdata(outi, is) < 0) |
| 778 | goto out; |
| 779 | |
| 780 | out: |
| 781 | freehthead(req); |
| 782 | buffree(head); |
| 783 | shutdown(sfd, SHUT_RDWR); |
| 784 | if(outi != NULL) |
| 785 | fclose(outi); |
| 786 | fclose(is); |
| 787 | fclose(os); |
| 788 | } |
| 789 | |
| 790 | static void listenloop(struct muth *muth, va_list args) |
| 791 | { |
| 792 | vavar(int, lfd); |
| 793 | int fd; |
| 794 | struct hthead *req; |
| 795 | |
| 796 | while(1) { |
| 797 | block(0, EV_READ, 0); |
| 798 | if((fd = recvreq(lfd, &req)) < 0) { |
| 799 | if(errno != 0) |
| 800 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); |
| 801 | break; |
| 802 | } |
| 803 | mustart(serve, req, fd); |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | static void sigign(int sig) |
| 808 | { |
| 809 | } |
| 810 | |
| 811 | static void sigexit(int sig) |
| 812 | { |
| 813 | shutdown(0, SHUT_RDWR); |
| 814 | exit(0); |
| 815 | } |
| 816 | |
| 817 | static void usage(FILE *out) |
| 818 | { |
| 819 | fprintf(out, "usage: callfcgi [-h] [-N RETRIES] [-i ID] [-u UNIX-PATH] [-t [HOST:]TCP-PORT] [PROGRAM [ARGS...]]\n"); |
| 820 | } |
| 821 | |
| 822 | int main(int argc, char **argv) |
| 823 | { |
| 824 | int c; |
| 825 | |
| 826 | while((c = getopt(argc, argv, "+hN:i:u:t:")) >= 0) { |
| 827 | switch(c) { |
| 828 | case 'h': |
| 829 | usage(stdout); |
| 830 | exit(0); |
| 831 | case 'N': |
| 832 | nolisten = atoi(optarg); |
| 833 | break; |
| 834 | case 'i': |
| 835 | sockid = optarg; |
| 836 | break; |
| 837 | case 'u': |
| 838 | unspec = optarg; |
| 839 | break; |
| 840 | case 't': |
| 841 | inspec = optarg; |
| 842 | break; |
| 843 | default: |
| 844 | usage(stderr); |
| 845 | exit(1); |
| 846 | } |
| 847 | } |
| 848 | progspec = argv + optind; |
| 849 | if(((sockid != NULL) + (unspec != NULL) + (inspec != NULL)) > 1) { |
| 850 | flog(LOG_ERR, "callfcgi: at most one of -i, -u or -t may be given"); |
| 851 | exit(1); |
| 852 | } |
| 853 | signal(SIGCHLD, SIG_IGN); |
| 854 | signal(SIGPIPE, sigign); |
| 855 | signal(SIGINT, sigexit); |
| 856 | signal(SIGTERM, sigexit); |
| 857 | mustart(listenloop, 0); |
| 858 | atexit(killcuraddr); |
| 859 | ioloop(); |
| 860 | return(0); |
| 861 | } |