citadel/sysdep.c

   1 /*
   2  * Citadel "system dependent" stuff.
   3  *
   4  * Here's where we (hopefully) have most parts of the Citadel server that
   5  * would need to be altered to run the server in a non-POSIX environment.
   6  *
   7  * If we ever port to a different platform and either have multiple
   8  * variants of this file or simply load it up with #ifdefs.
   9  *
  10  * Copyright (c) 1987-2011 by the citadel.org team
  11  *
  12  * This program is open source software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 3 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  */
  26
  27 #include "sysdep.h"
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <stdio.h>
  31 #include <fcntl.h>
  32 #include <ctype.h>
  33 #include <signal.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/wait.h>
  37 #include <sys/socket.h>
  38 #include <syslog.h>
  39 #include <sys/syslog.h>
  40
  41 #if TIME_WITH_SYS_TIME
  42 # include <sys/time.h>
  43 # include <time.h>
  44 #else
  45 # if HAVE_SYS_TIME_H
  46 #  include <sys/time.h>
  47 # else
  48 #  include <time.h>
  49 # endif
  50 #endif
  51
  52 #include <limits.h>
  53 #include <sys/resource.h>
  54 #include <netinet/in.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57 #include <netdb.h>
  58 #include <sys/un.h>
  59 #include <string.h>
  60 #include <pwd.h>
  61 #include <errno.h>
  62 #include <stdarg.h>
  63 #include <grp.h>
  64 #define SHOW_ME_VAPPEND_PRINTF
  65 #include <libcitadel.h>
  66 #include "citadel.h"
  67 #include "server.h"
  68 #include "sysdep_decls.h"
  69 #include "citserver.h"
  70 #include "support.h"
  71 #include "config.h"
  72 #include "database.h"
  73 #include "housekeeping.h"
  74 #include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
  75 #include "ecrash.h"
  76 #include "context.h"
  77
  78 #ifdef HAVE_SYS_SELECT_H
  79 #include <sys/select.h>
  80 #endif
  81
  82 #ifndef HAVE_SNPRINTF
  83 #include "snprintf.h"
  84 #endif
  85
  86 #include "ctdl_module.h"
  87 #include "threads.h"
  88 #include "user_ops.h"
  89 #include "control.h"
  90
  91
  92 /*
  93  * Signal handler to shut down the server.
  94  */
  95
  96 volatile int exit_signal = 0;
  97 volatile int shutdown_and_halt = 0;
  98 volatile int restart_server = 0;
  99 volatile int running_as_daemon = 0;
 100
 101 static RETSIGTYPE signal_cleanup(int signum) {
 102         syslog(LOG_DEBUG, "Caught signal %d; shutting down.", signum);
 103         exit_signal = signum;
 104 }
 105
 106 static RETSIGTYPE signal_exit(int signum) {
 107         exit(1);
 108 }
 109
 110
 111
 112 /*
 113  * Some initialization stuff...
 114  */
 115 void init_sysdep(void) {
 116         sigset_t set;
 117
 118         /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
 119 #ifdef FD_SETSIZE
 120 #ifdef RLIMIT_NOFILE
 121         struct rlimit rl;
 122         getrlimit(RLIMIT_NOFILE, &rl);
 123         rl.rlim_cur = FD_SETSIZE;
 124         rl.rlim_max = FD_SETSIZE;
 125         setrlimit(RLIMIT_NOFILE, &rl);
 126 #endif
 127 #endif
 128
 129         /* If we've got OpenSSL, we're going to use it. */
 130 #ifdef HAVE_OPENSSL
 131         init_ssl();
 132 #endif
 133
 134         /*
 135          * Set up a place to put thread-specific data.
 136          * We only need a single pointer per thread - it points to the
 137          * CitContext structure (in the ContextList linked list) of the
 138          * session to which the calling thread is currently bound.
 139          */
 140         if (pthread_key_create(&MyConKey, NULL) != 0) {
 141                 syslog(LOG_CRIT, "Can't create TSD key: %s", strerror(errno));
 142         }
 143
 144         /*
 145          * Interript, hangup, and terminate signals should cause the server
 146          * to gracefully clean up and shut down.
 147          */
 148         sigemptyset(&set);
 149         sigaddset(&set, SIGINT);
 150         sigaddset(&set, SIGHUP);
 151         sigaddset(&set, SIGTERM);
 152         sigprocmask(SIG_UNBLOCK, &set, NULL);
 153
 154         signal(SIGINT, signal_cleanup);
 155         signal(SIGHUP, signal_cleanup);
 156         signal(SIGTERM, signal_cleanup);
 157         signal(SIGUSR2, signal_exit);
 158
 159         /*
 160          * Do not shut down the server on broken pipe signals, otherwise the
 161          * whole Citadel service would come down whenever a single client
 162          * socket breaks.
 163          */
 164         signal(SIGPIPE, SIG_IGN);
 165 }
 166
 167
 168 /*
 169  * This is a generic function to set up a master socket for listening on
 170  * a TCP port.  The server shuts down if the bind fails.  (IPv4/IPv6 version)
 171  *
 172  * ip_addr      IP address to bind
 173  * port_number  port number to bind
 174  * queue_len    number of incoming connections to allow in the queue
 175  */
 176 int ctdl_tcp_server(char *ip_addr, int port_number, int queue_len, char *errormessage)
 177 {
 178         struct protoent *p;
 179         struct sockaddr_in6 sin6;
 180         struct sockaddr_in sin4;
 181         int s, i, b;
 182         int ip_version = 6;
 183
 184         memset(&sin6, 0, sizeof(sin6));
 185         memset(&sin4, 0, sizeof(sin4));
 186         sin6.sin6_family = AF_INET6;
 187         sin4.sin_family = AF_INET;
 188
 189         if (    (ip_addr == NULL)                                                       /* any IPv6 */
 190                 || (IsEmptyStr(ip_addr))
 191                 || (!strcmp(ip_addr, "*"))
 192         ) {
 193                 ip_version = 6;
 194                 sin6.sin6_addr = in6addr_any;
 195         }
 196         else if (!strcmp(ip_addr, "0.0.0.0"))                                           /* any IPv4 */
 197         {
 198                 ip_version = 4;
 199                 sin4.sin_addr.s_addr = INADDR_ANY;
 200         }
 201         else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':')))                     /* specific IPv4 */
 202         {
 203                 ip_version = 4;
 204                 if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
 205                         snprintf(errormessage, SIZ,
 206                                  "Error binding to [%s] : %s", ip_addr, strerror(errno)
 207                         );
 208                         syslog(LOG_ALERT, "%s", errormessage);
 209                         return (-1);
 210                 }
 211         }
 212         else                                                                            /* specific IPv6 */
 213         {
 214                 ip_version = 6;
 215                 if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
 216                         snprintf(errormessage, SIZ,
 217                                  "Error binding to [%s] : %s", ip_addr, strerror(errno)
 218                         );
 219                         syslog(LOG_ALERT, "%s", errormessage);
 220                         return (-1);
 221                 }
 222         }
 223
 224         if (port_number == 0) {
 225                 snprintf(errormessage, SIZ, "Can't start: no port number specified.");
 226                 syslog(LOG_ALERT, "%s", errormessage);
 227                 return (-1);
 228         }
 229         sin6.sin6_port = htons((u_short) port_number);
 230         sin4.sin_port = htons((u_short) port_number);
 231
 232         p = getprotobyname("tcp");
 233
 234         s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
 235         if (s < 0) {
 236                 snprintf(errormessage, SIZ,
 237                          "Can't create a listening socket: %s", strerror(errno)
 238                 );
 239                 syslog(LOG_ALERT, "%s", errormessage);
 240                 return (-1);
 241         }
 242         /* Set some socket options that make sense. */
 243         i = 1;
 244         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 245
 246         if (ip_version == 6) {
 247                 b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
 248         }
 249         else {
 250                 b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
 251         }
 252
 253         if (b < 0) {
 254                 snprintf(errormessage, SIZ,
 255                          "Can't bind: %s", strerror(errno)
 256                 );
 257                 syslog(LOG_ALERT, "%s", errormessage);
 258                 return (-1);
 259         }
 260
 261         fcntl(s, F_SETFL, O_NONBLOCK);
 262
 263         if (listen(s, ((queue_len >= 5) ? queue_len : 5) ) < 0) {
 264                 snprintf(errormessage, SIZ,
 265                          "Can't listen: %s", strerror(errno)
 266                 );
 267                 syslog(LOG_ALERT, "%s", errormessage);
 268                 return (-1);
 269         }
 270         return (s);
 271 }
 272
 273
 274
 275
 276
 277 /*
 278  * Create a Unix domain socket and listen on it
 279  */
 280 int ctdl_uds_server(char *sockpath, int queue_len, char *errormessage)
 281 {
 282         struct sockaddr_un addr;
 283         int s;
 284         int i;
 285         int actual_queue_len;
 286 #ifdef HAVE_STRUCT_UCRED
 287         int passcred = 1;
 288 #endif
 289
 290         actual_queue_len = queue_len;
 291         if (actual_queue_len < 5) actual_queue_len = 5;
 292
 293         i = unlink(sockpath);
 294         if ((i != 0) && (errno != ENOENT)) {
 295                 snprintf(errormessage, SIZ, "citserver: can't unlink %s: %s",
 296                         sockpath, strerror(errno)
 297                 );
 298                 syslog(LOG_EMERG, "%s", errormessage);
 299                 return(-1);
 300         }
 301
 302         memset(&addr, 0, sizeof(addr));
 303         addr.sun_family = AF_UNIX;
 304         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 305
 306         s = socket(AF_UNIX, SOCK_STREAM, 0);
 307         if (s < 0) {
 308                 snprintf(errormessage, SIZ,
 309                          "citserver: Can't create a socket: %s",
 310                          strerror(errno));
 311                 syslog(LOG_EMERG, "%s", errormessage);
 312                 return(-1);
 313         }
 314
 315         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 316                 snprintf(errormessage, SIZ,
 317                          "citserver: Can't bind: %s",
 318                          strerror(errno));
 319                 syslog(LOG_EMERG, "%s", errormessage);
 320                 return(-1);
 321         }
 322
 323         /* set to nonblock - we need this for some obscure situations */
 324         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 325                 snprintf(errormessage, SIZ,
 326                          "citserver: Can't set socket to non-blocking: %s",
 327                          strerror(errno));
 328                 syslog(LOG_EMERG, "%s", errormessage);
 329                 close(s);
 330                 return(-1);
 331         }
 332
 333         if (listen(s, actual_queue_len) < 0) {
 334                 snprintf(errormessage, SIZ,
 335                          "citserver: Can't listen: %s",
 336                          strerror(errno));
 337                 syslog(LOG_EMERG, "%s", errormessage);
 338                 return(-1);
 339         }
 340
 341 #ifdef HAVE_STRUCT_UCRED
 342         setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
 343 #endif
 344
 345         chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
 346         return(s);
 347 }
 348
 349
 350
 351 /*
 352  * The following functions implement output buffering on operating systems which
 353  * support it (such as Linux and various BSD flavors).
 354  */
 355 #ifndef HAVE_DARWIN
 356 #ifdef TCP_CORK
 357 #       define HAVE_TCP_BUFFERING
 358 #else
 359 #       ifdef TCP_NOPUSH
 360 #               define HAVE_TCP_BUFFERING
 361 #               define TCP_CORK TCP_NOPUSH
 362 #       endif
 363 #endif /* TCP_CORK */
 364 #endif /* HAVE_DARWIN */
 365
 366 static unsigned on = 1, off = 0;
 367
 368 void buffer_output(void) {
 369 #ifdef HAVE_TCP_BUFFERING
 370 #ifdef HAVE_OPENSSL
 371         if (!CC->redirect_ssl)
 372 #endif
 373                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 374 #endif
 375 }
 376
 377 void unbuffer_output(void) {
 378 #ifdef HAVE_TCP_BUFFERING
 379 #ifdef HAVE_OPENSSL
 380         if (!CC->redirect_ssl)
 381 #endif
 382                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 383 #endif
 384 }
 385
 386 void flush_output(void) {
 387 #ifdef HAVE_TCP_BUFFERING
 388         struct CitContext *CCC = CC;
 389         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 390         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 391 #endif
 392 }
 393
 394 /*
 395 static void flush_client_inbuf(void)
 396 {
 397         CitContext *CCC=CC;
 398
 399         FlushStrBuf(CCC->ReadBuf);
 400         CCC->Pos = NULL;
 401
 402 }
 403 */
 404
 405
 406 /*
 407  * client_close()       ...     close the client socket
 408  */
 409 void client_close(void) {
 410         CitContext *CCC = CC;
 411
 412         if (!CCC) return;
 413         if (CCC->client_socket < 0) return;
 414         syslog(LOG_DEBUG, "Closing socket %d", CCC->client_socket);
 415         close(CCC->client_socket);
 416         CCC->client_socket = -1 ;
 417 }
 418
 419
 420
 421
 422 /*
 423  * client_write()   ...    Send binary data to the client.
 424  */
 425 int client_write(const char *buf, int nbytes)
 426 {
 427         int bytes_written = 0;
 428         int retval;
 429 #ifndef HAVE_TCP_BUFFERING
 430         int old_buffer_len = 0;
 431 #endif
 432         fd_set wset;
 433         CitContext *Ctx;
 434         int fdflags;
 435
 436         if (nbytes < 1) return(0);
 437
 438         Ctx = CC;
 439
 440 #ifdef BIGBAD_IODBG
 441         {
 442                 int rv = 0;
 443                 char fn [SIZ];
 444                 FILE *fd;
 445
 446                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", Ctx->ServiceName, Ctx->cs_pid);
 447
 448                 fd = fopen(fn, "a+");
 449                 fprintf(fd, "Sending: BufSize: %d BufContent: [",
 450                         nbytes);
 451                 rv = fwrite(buf, nbytes, 1, fd);
 452                 fprintf(fd, "]\n");
 453
 454
 455                 fclose(fd);
 456         }
 457 #endif
 458 //      flush_client_inbuf();
 459         if (Ctx->redirect_buffer != NULL) {
 460                 StrBufAppendBufPlain(Ctx->redirect_buffer,
 461                                      buf, nbytes, 0);
 462                 return 0;
 463         }
 464
 465 #ifdef HAVE_OPENSSL
 466         if (Ctx->redirect_ssl) {
 467                 client_write_ssl(buf, nbytes);
 468                 return 0;
 469         }
 470 #endif
 471         if (Ctx->client_socket == -1) return -1;
 472
 473         fdflags = fcntl(Ctx->client_socket, F_GETFL);
 474
 475         while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
 476                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 477                         FD_ZERO(&wset);
 478                         FD_SET(Ctx->client_socket, &wset);
 479                         if (select(1, NULL, &wset, NULL, NULL) == -1) {
 480                                 if (errno == EINTR)
 481                                 {
 482                                         syslog(LOG_DEBUG, "client_write(%d bytes) select() interrupted.",
 483                                                 nbytes-bytes_written
 484                                         );
 485                                         if (CtdlThreadCheckStop()) {
 486                                                 CC->kill_me = KILLME_SELECT_INTERRUPTED;
 487                                                 return (-1);
 488                                         } else {
 489                                                 /* can't trust fd's and stuff so we need to re-create them */
 490                                                 continue;
 491                                         }
 492                                 } else {
 493                                         syslog(LOG_ERR,
 494                                                 "client_write(%d bytes) select failed: %s (%d)",
 495                                                 nbytes - bytes_written,
 496                                                 strerror(errno), errno
 497                                         );
 498                                         cit_backtrace();
 499                                         client_close();
 500                                         Ctx->kill_me = KILLME_SELECT_FAILED;
 501                                         return -1;
 502                                 }
 503                         }
 504                 }
 505
 506                 retval = write(Ctx->client_socket, &buf[bytes_written], nbytes - bytes_written);
 507                 if (retval < 1) {
 508                         syslog(LOG_ERR,
 509                                 "client_write(%d bytes) failed: %s (%d)",
 510                                 nbytes - bytes_written,
 511                                 strerror(errno), errno
 512                         );
 513                         cit_backtrace();
 514                         client_close();
 515                         Ctx->kill_me = KILLME_WRITE_FAILED;
 516                         return -1;
 517                 }
 518                 bytes_written = bytes_written + retval;
 519         }
 520         return 0;
 521 }
 522
 523 void cputbuf(const StrBuf *Buf) {
 524         client_write(ChrPtr(Buf), StrLength(Buf));
 525 }
 526
 527
 528 /*
 529  * cprintf()    Send formatted printable data to the client.
 530  *              Implemented in terms of client_write() so it's technically not sysdep...
 531  */
 532 void cprintf(const char *format, ...) {
 533         va_list arg_ptr;
 534         char buf[1024];
 535
 536         va_start(arg_ptr, format);
 537         if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
 538                 buf[sizeof buf - 2] = '\n';
 539         client_write(buf, strlen(buf));
 540         va_end(arg_ptr);
 541 }
 542
 543
 544 /*
 545  * Read data from the client socket.
 546  *
 547  * sock         socket fd to read from
 548  * buf          buffer to read into
 549  * bytes        number of bytes to read
 550  * timeout      Number of seconds to wait before timing out
 551  *
 552  * Possible return values:
 553  *      1       Requested number of bytes has been read.
 554  *      0       Request timed out.
 555  *      -1      Connection is broken, or other error.
 556  */
 557 int client_read_blob(StrBuf *Target, int bytes, int timeout)
 558 {
 559         CitContext *CCC=CC;
 560         const char *Error;
 561         int retval = 0;
 562
 563 #ifdef HAVE_OPENSSL
 564         if (CCC->redirect_ssl) {
 565 #ifdef BIGBAD_IODBG
 566                 int rv = 0;
 567                 char fn [SIZ];
 568                 FILE *fd;
 569
 570                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 571
 572                 fd = fopen(fn, "a+");
 573                 fprintf(fd, "Reading BLOB: BufSize: %d ",
 574                         bytes);
 575                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 576                 fprintf(fd, "]\n");
 577
 578
 579                 fclose(fd);
 580 #endif
 581                 retval = client_read_sslblob(Target, bytes, timeout);
 582                 if (retval < 0) {
 583                         syslog(LOG_CRIT, "%s failed", __FUNCTION__);
 584                 }
 585 #ifdef BIGBAD_IODBG
 586                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 587
 588                 fd = fopen(fn, "a+");
 589                 fprintf(fd, "Read: %d BufContent: [",
 590                         StrLength(Target));
 591                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 592                 fprintf(fd, "]\n");
 593
 594
 595                 fclose(fd);
 596 #endif
 597         }
 598         else
 599 #endif
 600         {
 601 #ifdef BIGBAD_IODBG
 602                 int rv = 0;
 603                 char fn [SIZ];
 604                 FILE *fd;
 605
 606                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 607
 608                 fd = fopen(fn, "a+");
 609                 fprintf(fd, "Reading BLOB: BufSize: %d ",
 610                         bytes);
 611                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 612                 fprintf(fd, "]\n");
 613
 614
 615                 fclose(fd);
 616 #endif
 617                 retval = StrBufReadBLOBBuffered(Target,
 618                                                 CCC->ReadBuf,
 619                                                 &CCC->Pos,
 620                                                 &CCC->client_socket,
 621                                                 1,
 622                                                 bytes,
 623                                                 O_TERM,
 624                                                 &Error);
 625                 if (retval < 0) {
 626                         syslog(LOG_CRIT, "%s failed: %s\n", __FUNCTION__, Error);
 627                         client_close();
 628                         return retval;
 629                 }
 630 #ifdef BIGBAD_IODBG
 631                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 632
 633                 fd = fopen(fn, "a+");
 634                 fprintf(fd, "Read: %d BufContent: [",
 635                         StrLength(Target));
 636                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 637                 fprintf(fd, "]\n");
 638                 fclose(fd);
 639 #endif
 640         }
 641         return retval;
 642 }
 643
 644
 645 /*
 646  * to make client_read_random_blob() more efficient, increase buffer size.
 647  * just use in greeting function, else your buffer may be flushed
 648  */
 649 void client_set_inbound_buf(long N)
 650 {
 651         FlushStrBuf(CC->ReadBuf);
 652         ReAdjustEmptyBuf(CC->ReadBuf, N * SIZ, N * SIZ);
 653 }
 654
 655 int client_read_random_blob(StrBuf *Target, int timeout)
 656 {
 657         CitContext *CCC=CC;
 658         int rc;
 659
 660         rc =  client_read_blob(Target, 1, timeout);
 661         if (rc > 0)
 662         {
 663                 long len;
 664                 const char *pch;
 665
 666                 len = StrLength(CCC->ReadBuf);
 667                 pch = ChrPtr(CCC->ReadBuf);
 668
 669                 if (len > 0)
 670                 {
 671                         if (CCC->Pos != NULL) {
 672                                 len -= CCC->Pos - pch;
 673                                 pch = CCC->Pos;
 674                         }
 675                         StrBufAppendBufPlain(Target, pch, len, 0);
 676                         FlushStrBuf(CCC->ReadBuf);
 677                         CCC->Pos = NULL;
 678 #ifdef BIGBAD_IODBG
 679                         {
 680                                 int rv = 0;
 681                                 char fn [SIZ];
 682                                 FILE *fd;
 683
 684                                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 685
 686                                 fd = fopen(fn, "a+");
 687                                 fprintf(fd, "Read: BufSize: %d BufContent: [",
 688                                         StrLength(Target));
 689                                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 690                                 fprintf(fd, "]\n");
 691
 692
 693                                 fclose(fd);
 694                         }
 695 #endif
 696
 697                         return StrLength(Target);
 698                 }
 699                 return rc;
 700         }
 701         else
 702                 return rc;
 703 }
 704
 705 int client_read_to(char *buf, int bytes, int timeout)
 706 {
 707         CitContext *CCC=CC;
 708         int rc;
 709
 710         rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
 711         if (rc < 0)
 712         {
 713                 *buf = '\0';
 714                 return rc;
 715         }
 716         else
 717         {
 718                 memcpy(buf,
 719                        ChrPtr(CCC->MigrateBuf),
 720                        StrLength(CCC->MigrateBuf) + 1);
 721                 FlushStrBuf(CCC->MigrateBuf);
 722                 return rc;
 723         }
 724 }
 725
 726
 727 int HaveMoreLinesWaiting(CitContext *CCC)
 728 {
 729         if ((CCC->kill_me != 0) || (
 730             (CCC->Pos == NULL) &&
 731             (StrLength(CCC->ReadBuf) == 0) &&
 732             (CCC->client_socket != -1)) )
 733                 return 0;
 734         else
 735                 return 1;
 736 }
 737
 738
 739 /*
 740  * Read data from the client socket with default timeout.
 741  * (This is implemented in terms of client_read_to() and could be
 742  * justifiably moved out of sysdep.c)
 743  */
 744 INLINE int client_read(char *buf, int bytes)
 745 {
 746         return(client_read_to(buf, bytes, config.c_sleeping));
 747 }
 748
 749 int CtdlClientGetLine(StrBuf *Target)
 750 {
 751         CitContext *CCC=CC;
 752         const char *Error;
 753         int rc;
 754
 755         FlushStrBuf(Target);
 756 #ifdef HAVE_OPENSSL
 757         if (CCC->redirect_ssl) {
 758 #ifdef BIGBAD_IODBG
 759                 char fn [SIZ];
 760                 FILE *fd;
 761                 int len = 0;
 762                 int rlen = 0;
 763                 int  nlen = 0;
 764                 int nrlen = 0;
 765                 const char *pch;
 766
 767                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 768
 769                 fd = fopen(fn, "a+");
 770                 pch = ChrPtr(CCC->ReadBuf);
 771                 len = StrLength(CCC->ReadBuf);
 772                 if (CCC->Pos != NULL)
 773                         rlen = CC->Pos - pch;
 774                 else
 775                         rlen = 0;
 776
 777 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 778                         len, rlen, pch);
 779 */
 780                 fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
 781                         len, rlen);
 782 #endif
 783                 rc = client_readline_sslbuffer(Target,
 784                                                CCC->ReadBuf,
 785                                                &CCC->Pos,
 786                                                1);
 787 #ifdef BIGBAD_IODBG
 788                 pch = ChrPtr(CCC->ReadBuf);
 789                 nlen = StrLength(CCC->ReadBuf);
 790                 if (CCC->Pos != NULL)
 791                         nrlen = CC->Pos - pch;
 792                 else
 793                         nrlen = 0;
 794 /*
 795                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 796                         len, nlen, rlen, nrlen, pch);
 797 */
 798                 fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 799                         len, nlen, rlen, nrlen);
 800
 801                 fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 802                         StrLength(Target), ChrPtr(Target));
 803                 fclose(fd);
 804
 805                 if (rc < 0)
 806                         syslog(LOG_CRIT,
 807                                       "%s failed\n",
 808                                       __FUNCTION__);
 809 #endif
 810                 return rc;
 811         }
 812         else
 813 #endif
 814         {
 815 #ifdef BIGBAD_IODBG
 816                 char fn [SIZ];
 817                 FILE *fd;
 818                 int len, rlen, nlen, nrlen;
 819                 const char *pch;
 820
 821                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 822
 823                 fd = fopen(fn, "a+");
 824                 pch = ChrPtr(CCC->ReadBuf);
 825                 len = StrLength(CCC->ReadBuf);
 826                 if (CCC->Pos != NULL)
 827                         rlen = CC->Pos - pch;
 828                 else
 829                         rlen = 0;
 830
 831 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 832                         len, rlen, pch);
 833 */
 834                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 835                         len, rlen);
 836 #endif
 837                 rc = StrBufTCP_read_buffered_line_fast(Target,
 838                                                        CCC->ReadBuf,
 839                                                        &CCC->Pos,
 840                                                        &CCC->client_socket,
 841                                                        5,
 842                                                        1,
 843                                                        &Error);
 844
 845 #ifdef BIGBAD_IODBG
 846                 pch = ChrPtr(CCC->ReadBuf);
 847                 nlen = StrLength(CCC->ReadBuf);
 848                 if (CCC->Pos != NULL)
 849                         nrlen = CC->Pos - pch;
 850                 else
 851                         nrlen = 0;
 852 /*
 853                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 854                         len, nlen, rlen, nrlen, pch);
 855 */
 856                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 857                         len, nlen, rlen, nrlen);
 858
 859                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 860                         StrLength(Target), ChrPtr(Target));
 861                 fclose(fd);
 862
 863                 if ((rc < 0) && (Error != NULL))
 864                         syslog(LOG_CRIT,
 865                                       "%s failed: %s\n",
 866                                       __FUNCTION__,
 867                                       Error);
 868 #endif
 869                 return rc;
 870         }
 871 }
 872
 873
 874 /*
 875  * client_getln()   ...   Get a LF-terminated line of text from the client.
 876  * (This is implemented in terms of client_read() and could be
 877  * justifiably moved out of sysdep.c)
 878  */
 879 int client_getln(char *buf, int bufsize)
 880 {
 881         int i, retval;
 882         CitContext *CCC=CC;
 883         const char *pCh;
 884
 885         retval = CtdlClientGetLine(CCC->MigrateBuf);
 886         if (retval < 0)
 887           return(retval >= 0);
 888
 889
 890         i = StrLength(CCC->MigrateBuf);
 891         pCh = ChrPtr(CCC->MigrateBuf);
 892         /* Strip the trailing LF, and the trailing CR if present.
 893          */
 894         if (bufsize <= i)
 895                 i = bufsize - 1;
 896         while ( (i > 0)
 897                 && ( (pCh[i - 1]==13)
 898                      || ( pCh[i - 1]==10)) ) {
 899                 i--;
 900         }
 901         memcpy(buf, pCh, i);
 902         buf[i] = 0;
 903
 904         FlushStrBuf(CCC->MigrateBuf);
 905         if (retval < 0) {
 906                 safestrncpy(&buf[i], "000", bufsize - i);
 907         }
 908         return(retval >= 0);
 909 }
 910
 911
 912 /*
 913  * Cleanup any contexts that are left lying around
 914  */
 915
 916
 917 void close_masters (void)
 918 {
 919         struct ServiceFunctionHook *serviceptr;
 920
 921         /*
 922          * close all protocol master sockets
 923          */
 924         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 925             serviceptr = serviceptr->next ) {
 926
 927                 if (serviceptr->tcp_port > 0)
 928                 {
 929                         syslog(LOG_INFO, "Closing listener on port %d\n",
 930                                 serviceptr->tcp_port);
 931                         serviceptr->tcp_port = 0;
 932                 }
 933
 934                 if (serviceptr->sockpath != NULL)
 935                         syslog(LOG_INFO, "Closing listener on '%s'\n",
 936                                 serviceptr->sockpath);
 937
 938                 close(serviceptr->msock);
 939                 /* If it's a Unix domain socket, remove the file. */
 940                 if (serviceptr->sockpath != NULL) {
 941                         unlink(serviceptr->sockpath);
 942                         serviceptr->sockpath = NULL;
 943                 }
 944         }
 945 }
 946
 947
 948 /*
 949  * The system-dependent part of master_cleanup() - close the master socket.
 950  */
 951 void sysdep_master_cleanup(void) {
 952
 953         close_masters();
 954
 955         context_cleanup();
 956
 957 #ifdef HAVE_OPENSSL
 958         destruct_ssl();
 959 #endif
 960         CtdlDestroyProtoHooks();
 961         CtdlDestroyDeleteHooks();
 962         CtdlDestroyXmsgHooks();
 963         CtdlDestroyNetprocHooks();
 964         CtdlDestroyUserHooks();
 965         CtdlDestroyMessageHook();
 966         CtdlDestroyCleanupHooks();
 967         CtdlDestroyFixedOutputHooks();
 968         CtdlDestroySessionHooks();
 969         CtdlDestroyServiceHook();
 970         CtdlDestroyRoomHooks();
 971         CtdlDestroySearchHooks();
 972         #ifdef HAVE_BACKTRACE
 973 ///     eCrash_Uninit();
 974         #endif
 975 }
 976
 977
 978
 979 pid_t current_child;
 980 void graceful_shutdown(int signum) {
 981         kill(current_child, signum);
 982         unlink(file_pid_file);
 983         exit(0);
 984 }
 985
 986 int nFireUps = 0;
 987 int nFireUpsNonRestart = 0;
 988 pid_t ForkedPid = 1;
 989
 990 /*
 991  * Start running as a daemon.
 992  */
 993 void start_daemon(int unused) {
 994         int status = 0;
 995         pid_t child = 0;
 996         FILE *fp;
 997         int do_restart = 0;
 998
 999         current_child = 0;
1000
1001         /* Close stdin/stdout/stderr and replace them with /dev/null.
1002          * We don't just call close() because we don't want these fd's
1003          * to be reused for other files.
1004          */
1005         if (chdir(ctdl_run_dir) != 0)
1006                 syslog(LOG_EMERG,
1007                               "unable to change into directory [%s]: %s",
1008                               ctdl_run_dir, strerror(errno));
1009
1010         child = fork();
1011         if (child != 0) {
1012                 exit(0);
1013         }
1014
1015         signal(SIGHUP, SIG_IGN);
1016         signal(SIGINT, SIG_IGN);
1017         signal(SIGQUIT, SIG_IGN);
1018
1019         setsid();
1020         umask(0);
1021         if ((freopen("/dev/null", "r", stdin) != stdin) ||
1022             (freopen("/dev/null", "w", stdout) != stdout) ||
1023             (freopen("/dev/null", "w", stderr) != stderr))
1024                 syslog(LOG_EMERG,
1025                               "unable to reopen stdin/out/err %s",
1026                               strerror(errno));
1027
1028
1029         do {
1030                 current_child = fork();
1031
1032                 signal(SIGTERM, graceful_shutdown);
1033
1034                 if (current_child < 0) {
1035                         perror("fork");
1036                         exit(errno);
1037                 }
1038
1039                 else if (current_child == 0) {
1040                         return; /* continue starting citadel. */
1041                 }
1042
1043                 else {
1044                         fp = fopen(file_pid_file, "w");
1045                         if (fp != NULL) {
1046                                 fprintf(fp, ""F_PID_T"\n", getpid());
1047                                 fclose(fp);
1048                         }
1049                         waitpid(current_child, &status, 0);
1050                 }
1051                 do_restart = 0;
1052                 nFireUpsNonRestart = nFireUps;
1053
1054                 /* Exit code 0 means the watcher should exit */
1055                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
1056                         do_restart = 0;
1057                 }
1058
1059                 /* Exit code 101-109 means the watcher should exit */
1060                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
1061                         do_restart = 0;
1062                 }
1063
1064                 /* Any other exit code, or no exit code, means we should restart. */
1065                 else {
1066                         do_restart = 1;
1067                         nFireUps++;
1068                         ForkedPid = current_child;
1069                 }
1070
1071         } while (do_restart);
1072
1073         unlink(file_pid_file);
1074         exit(WEXITSTATUS(status));
1075 }
1076
1077
1078
1079 void checkcrash(void)
1080 {
1081         if (nFireUpsNonRestart != nFireUps)
1082         {
1083                 StrBuf *CrashMail;
1084
1085                 CrashMail = NewStrBuf();
1086                 syslog(LOG_ALERT, "Posting crash message\n");
1087                 StrBufPrintf(CrashMail,
1088                         " \n"
1089                         " The Citadel server process (citserver) terminated unexpectedly."
1090                         "\n \n"
1091                         " This could be the result of a bug in the server program, or some external "
1092                         "factor.\n \n"
1093                         " You can obtain more information about this by enabling core dumps.\n \n"
1094                         " For more information, please see:\n \n"
1095                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
1096                         "\n \n"
1097
1098                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
1099                         ,
1100                         ctdl_run_dir, ForkedPid);
1101                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
1102                 FreeStrBuf(&CrashMail);
1103         }
1104 }
1105
1106
1107 /*
1108  * Generic routine to convert a login name to a full name (gecos)
1109  * Returns nonzero if a conversion took place
1110  */
1111 int convert_login(char NameToConvert[]) {
1112         struct passwd *pw;
1113         int a;
1114
1115         pw = getpwnam(NameToConvert);
1116         if (pw == NULL) {
1117                 return(0);
1118         }
1119         else {
1120                 strcpy(NameToConvert, pw->pw_gecos);
1121                 for (a=0; a<strlen(NameToConvert); ++a) {
1122                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1123                 }
1124                 return(1);
1125         }
1126 }
1127
1128
1129
1130 /*
1131  * This loop just keeps going and going and going...
1132  */
1133 void *worker_thread(void *blah) {
1134         int highest;
1135         CitContext *ptr;
1136         CitContext *bind_me = NULL;
1137         fd_set readfds;
1138         int retval = 0;
1139         struct timeval tv;
1140         int force_purge = 0;
1141
1142         while (!CtdlThreadCheckStop()) {
1143
1144                 /* make doubly sure we're not holding any stale db handles
1145                  * which might cause a deadlock.
1146                  */
1147                 cdb_check_handles();
1148 do_select:      force_purge = 0;
1149                 bind_me = NULL;         /* Which session shall we handle? */
1150
1151                 /* Initialize the fdset. */
1152                 FD_ZERO(&readfds);
1153                 highest = 0;
1154
1155                 begin_critical_section(S_SESSION_TABLE);
1156                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1157                         /* Don't select on dead sessions, only truly idle ones */
1158                         if (    (ptr->state == CON_IDLE)
1159                                 && (ptr->kill_me == 0)
1160                                 && (ptr->client_socket != -1)
1161                         ) {
1162                                 FD_SET(ptr->client_socket, &readfds);
1163                                 if (ptr->client_socket > highest)
1164                                         highest = ptr->client_socket;
1165                         }
1166                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1167                                 bind_me = ptr;
1168                                 ptr->state = CON_EXECUTING;
1169                                 break;
1170                         }
1171                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1172                                 bind_me = ptr;
1173                                 ptr->state = CON_STARTING;
1174                                 break;
1175                         }
1176                 }
1177                 end_critical_section(S_SESSION_TABLE);
1178
1179                 if (bind_me) {
1180                         goto SKIP_SELECT;
1181                 }
1182
1183                 /* If we got this far, it means that there are no sessions
1184                  * which a previous thread marked for attention, so we go
1185                  * ahead and get ready to select().
1186                  */
1187
1188                 if (!CtdlThreadCheckStop()) {
1189                         tv.tv_sec = 1;          /* wake up every second if no input */
1190                         tv.tv_usec = 0;
1191                         retval = select(highest + 1, &readfds, NULL, NULL, &tv);
1192                 }
1193                 else {
1194                         return NULL;
1195                 }
1196
1197                 /* Now figure out who made this select() unblock.
1198                  * First, check for an error or exit condition.
1199                  */
1200                 if (retval < 0) {
1201                         if (errno == EBADF) {
1202                                 syslog(LOG_NOTICE, "select() failed: (%s)\n", strerror(errno));
1203                                 goto do_select;
1204                         }
1205                         if (errno != EINTR) {
1206                                 syslog(LOG_EMERG, "Exiting (%s)\n", strerror(errno));
1207                                 CtdlThreadStopAll();
1208                                 continue;
1209                         } else {
1210                                 syslog(LOG_DEBUG, "Interrupted select()\n");
1211                                 if (CtdlThreadCheckStop()) return(NULL);
1212                                 goto do_select;
1213                         }
1214                 }
1215                 else if (retval == 0) {
1216                         if (CtdlThreadCheckStop()) return(NULL);
1217                 }
1218
1219                 /* It must be a client socket.  Find a context that has data
1220                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1221                  * active sockets other than our chosen one are marked as
1222                  * CON_READY so the next thread that comes around can just bind
1223                  * to one without having to select() again.
1224                  */
1225                 begin_critical_section(S_SESSION_TABLE);
1226                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1227                         int checkfd = ptr->client_socket;
1228                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1229                                 if (FD_ISSET(checkfd, &readfds)) {
1230                                         ptr->input_waiting = 1;
1231                                         if (!bind_me) {
1232                                                 bind_me = ptr;  /* I choose you! */
1233                                                 bind_me->state = CON_EXECUTING;
1234                                         }
1235                                         else {
1236                                                 ptr->state = CON_READY;
1237                                         }
1238                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1239                                         if (!bind_me) {
1240                                                 bind_me = ptr;  /* I choose you! */
1241                                                 bind_me->state = CON_EXECUTING;
1242                                         }
1243                                         else {
1244                                                 ptr->state = CON_READY;
1245                                         }
1246                                 }
1247                         }
1248                 }
1249                 end_critical_section(S_SESSION_TABLE);
1250
1251 SKIP_SELECT:
1252                 /* We're bound to a session */
1253                 if (bind_me != NULL) {
1254                         become_session(bind_me);
1255
1256                         if (bind_me->state == CON_STARTING) {
1257                                 bind_me->state = CON_EXECUTING;
1258                                 begin_session(bind_me);
1259                                 bind_me->h_greeting_function();
1260                         }
1261                         /* If the client has sent a command, execute it. */
1262                         if (CC->input_waiting) {
1263                                 CC->h_command_function();
1264
1265                                 while (HaveMoreLinesWaiting(CC))
1266                                        CC->h_command_function();
1267
1268                                 CC->input_waiting = 0;
1269                         }
1270
1271                         /* If there are asynchronous messages waiting and the
1272                          * client supports it, do those now */
1273                         if ((CC->is_async) && (CC->async_waiting)
1274                            && (CC->h_async_function != NULL)) {
1275                                 CC->h_async_function();
1276                                 CC->async_waiting = 0;
1277                         }
1278
1279                         force_purge = CC->kill_me;
1280                         become_session(NULL);
1281                         bind_me->state = CON_IDLE;
1282                 }
1283
1284                 dead_session_purge(force_purge);
1285                 do_housekeeping();
1286         }
1287         /* If control reaches this point, the server is shutting down */
1288         return(NULL);
1289 }
1290
1291
1292
1293
1294 /*
1295  * A function to handle selecting on master sockets.
1296  * In other words it handles new connections.
1297  * It is a thread.
1298  */
1299 void *select_on_master(void *blah)
1300 {
1301         struct ServiceFunctionHook *serviceptr;
1302         fd_set master_fds;
1303         int highest;
1304         struct timeval tv;
1305         int ssock;                      /* Descriptor for client socket */
1306         CitContext *con = NULL;         /* Temporary context pointer */
1307         int m;
1308         int i;
1309         int retval;
1310         struct CitContext select_on_master_CC;
1311
1312         CtdlFillSystemContext(&select_on_master_CC, "select_on_master");
1313         pthread_setspecific(MyConKey, (void *)&select_on_master_CC);
1314
1315         while (!CtdlThreadCheckStop()) {
1316                 /* Initialize the fdset. */
1317                 FD_ZERO(&master_fds);
1318                 highest = 0;
1319
1320                 /* First, add the various master sockets to the fdset. */
1321                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1322                 serviceptr = serviceptr->next ) {
1323                         m = serviceptr->msock;
1324                         FD_SET(m, &master_fds);
1325                         if (m > highest) {
1326                                 highest = m;
1327                         }
1328                 }
1329
1330                 if (!CtdlThreadCheckStop()) {
1331                         tv.tv_sec = 60;         /* wake up every second if no input */
1332                         tv.tv_usec = 0;
1333                         retval = select(highest + 1, &master_fds, NULL, NULL, &tv);
1334                 }
1335                 else
1336                         return NULL;
1337
1338                 /* Now figure out who made this select() unblock.
1339                  * First, check for an error or exit condition.
1340                  */
1341                 if (retval < 0) {
1342                         if (errno == EBADF) {
1343                                 syslog(LOG_NOTICE, "select() failed: (%s)\n",
1344                                         strerror(errno));
1345                                 continue;
1346                         }
1347                         if (errno != EINTR) {
1348                                 syslog(LOG_EMERG, "Exiting (%s)\n", strerror(errno));
1349                                 CtdlThreadStopAll();
1350                         } else {
1351                                 syslog(LOG_DEBUG, "Interrupted CtdlThreadSelect.\n");
1352                                 if (CtdlThreadCheckStop()) return(NULL);
1353                                 continue;
1354                         }
1355                 }
1356                 else if(retval == 0) {
1357                         if (CtdlThreadCheckStop()) return(NULL);
1358                         continue;
1359                 }
1360                 /* Next, check to see if it's a new client connecting
1361                  * on a master socket.
1362                  */
1363                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1364                      serviceptr = serviceptr->next ) {
1365
1366                         if (FD_ISSET(serviceptr->msock, &master_fds)) {
1367                                 ssock = accept(serviceptr->msock, NULL, 0);
1368                                 if (ssock >= 0) {
1369                                         syslog(LOG_DEBUG, "New client socket %d\n", ssock);
1370
1371                                         /* The master socket is non-blocking but the client
1372                                          * sockets need to be blocking, otherwise certain
1373                                          * operations barf on FreeBSD.  Not a fatal error.
1374                                          */
1375                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1376                                                 syslog(LOG_EMERG,
1377                                                         "citserver: Can't set socket to blocking: %s\n",
1378                                                         strerror(errno));
1379                                         }
1380
1381                                         /* New context will be created already
1382                                          * set up in the CON_EXECUTING state.
1383                                          */
1384                                         con = CreateNewContext();
1385
1386                                         /* Assign our new socket number to it. */
1387                                         con->client_socket = ssock;
1388                                         con->h_command_function = serviceptr->h_command_function;
1389                                         con->h_async_function = serviceptr->h_async_function;
1390                                         con->h_greeting_function = serviceptr->h_greeting_function;
1391                                         con->ServiceName = serviceptr->ServiceName;
1392
1393                                         /* Determine whether it's a local socket */
1394                                         if (serviceptr->sockpath != NULL) {
1395                                                 con->is_local_socket = 1;
1396                                         }
1397
1398                                         /* Set the SO_REUSEADDR socket option */
1399                                         i = 1;
1400                                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
1401                                         con->state = CON_GREETING;
1402                                         retval--;
1403                                         if (retval == 0)
1404                                                 break;
1405                                 }
1406                         }
1407                 }
1408         }
1409         CtdlClearSystemContext();
1410
1411         return NULL;
1412 }
1413
1414
1415
1416 /*
1417  * SyslogFacility()
1418  * Translate text facility name to syslog.h defined value.
1419  */
1420 int SyslogFacility(char *name)
1421 {
1422         int i;
1423         struct
1424         {
1425                 int facility;
1426                 char *name;
1427         }   facTbl[] =
1428         {
1429                 {   LOG_KERN,   "kern"          },
1430                 {   LOG_USER,   "user"          },
1431                 {   LOG_MAIL,   "mail"          },
1432                 {   LOG_DAEMON, "daemon"        },
1433                 {   LOG_AUTH,   "auth"          },
1434                 {   LOG_SYSLOG, "syslog"        },
1435                 {   LOG_LPR,    "lpr"           },
1436                 {   LOG_NEWS,   "news"          },
1437                 {   LOG_UUCP,   "uucp"          },
1438                 {   LOG_LOCAL0, "local0"        },
1439                 {   LOG_LOCAL1, "local1"        },
1440                 {   LOG_LOCAL2, "local2"        },
1441                 {   LOG_LOCAL3, "local3"        },
1442                 {   LOG_LOCAL4, "local4"        },
1443                 {   LOG_LOCAL5, "local5"        },
1444                 {   LOG_LOCAL6, "local6"        },
1445                 {   LOG_LOCAL7, "local7"        },
1446                 {   0,            NULL          }
1447         };
1448         for(i = 0; facTbl[i].name != NULL; i++) {
1449                 if(!strcasecmp(name, facTbl[i].name))
1450                         return facTbl[i].facility;
1451         }
1452         return LOG_DAEMON;
1453 }