webcit/webserver.c

   1 /*
   2  * Copyright (c) 1996-2012 by the citadel.org team
   3  *
   4  * This program is open source software.  You can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License version 3.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  */
  12
  13 #include "webcit.h"
  14 #include "webserver.h"
  15
  16 #include "modules_init.h"
  17 #ifndef HAVE_SNPRINTF
  18 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  19 #endif
  20
  21 extern int msock;                               /* master listening socket */
  22 extern char static_icon_dir[PATH_MAX];          /* where should we find our mime icons */
  23 int is_https = 0;                               /* Nonzero if I am an HTTPS service */
  24 int follow_xff = 0;                             /* Follow X-Forwarded-For: header? */
  25 int DisableGzip = 0;
  26 char *default_landing_page = NULL;
  27 extern pthread_mutex_t SessionListMutex;
  28 extern pthread_key_t MyConKey;
  29
  30 extern void *housekeeping_loop(void);
  31 extern int webcit_tcp_server(char *ip_addr, int port_number, int queue_len);
  32 extern int webcit_uds_server(char *sockpath, int queue_len);
  33 extern void graceful_shutdown_watcher(int signum);
  34 extern void graceful_shutdown(int signum);
  35 extern void start_daemon(char *pid_file);
  36 extern void webcit_calc_dirs_n_files(int relh, const char *basedir, int home, char *webcitdir, char *relhome);
  37 extern void worker_entry(void);
  38 extern void drop_root(uid_t UID);
  39
  40 char socket_dir[PATH_MAX];      /* where to talk to our citadel server */
  41 char *server_cookie = NULL;     /* our Cookie connection to the client */
  42 int http_port = PORT_NUM;       /* Port to listen on */
  43 char *ctdlhost = DEFAULT_HOST;  /* Host name or IP address of Citadel server */
  44 char *ctdlport = DEFAULT_PORT;  /* Port number of Citadel server */
  45 int setup_wizard = 0;           /* should we run the setup wizard? */
  46 char wizard_filename[PATH_MAX]; /* location of file containing the last webcit version against which we ran setup wizard */
  47 int running_as_daemon = 0;      /* should we deamonize on startup? */
  48
  49 /* #define DBG_PRINNT_HOOKS_AT_START */
  50 #ifdef DBG_PRINNT_HOOKS_AT_START
  51 extern HashList *HandlerHash;
  52 const char foobuf[32];
  53 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
  54 #endif
  55 extern int dbg_analyze_msg;
  56 extern int dbg_backtrace_template_errors;
  57 extern int DumpTemplateI18NStrings;
  58 extern StrBuf *I18nDump;
  59 void InitTemplateCache(void);
  60 extern int LoadTemplates;
  61
  62
  63 /*
  64  * Here's where it all begins.
  65  */
  66 int main(int argc, char **argv)
  67 {
  68         uid_t UID = -1;
  69         size_t basesize = 2;            /* how big should strbufs be on creation? */
  70         pthread_t SessThread;           /* Thread descriptor */
  71         pthread_attr_t attr;            /* Thread attributes */
  72         int a;                          /* General-purpose variable */
  73         char ip_addr[256]="*";
  74         int relh=0;
  75         int home=0;
  76         char relhome[PATH_MAX]="";
  77         char webcitdir[PATH_MAX] = DATADIR;
  78         char *pidfile = NULL;
  79         char *hdir;
  80         const char *basedir = NULL;
  81         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
  82         const char *I18nDumpFile = NULL;
  83
  84         WildFireInitBacktrace(argv[0], 2);
  85
  86         start_modules();
  87
  88 #ifdef DBG_PRINNT_HOOKS_AT_START
  89 /*      dbg_PrintHash(HandlerHash, nix, NULL);*/
  90 #endif
  91
  92         /* Ensure that we are linked to the correct version of libcitadel */
  93         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
  94                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
  95                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
  96                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
  97                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
  98                 return(1);
  99         }
 100
 101         strcpy(uds_listen_path, "");
 102
 103         /* Parse command line */
 104 #ifdef HAVE_OPENSSL
 105         while ((a = getopt(argc, argv, "u:h:i:p:t:T:B:x:g:dD:G:cfsS:Z")) != EOF)
 106 #else
 107         while ((a = getopt(argc, argv, "u:h:i:p:t:T:B:x:g:dD:G:cfZ")) != EOF)
 108 #endif
 109                 switch (a) {
 110                 case 'u':
 111                         UID = atol(optarg);
 112                         break;
 113                 case 'h':
 114                         hdir = strdup(optarg);
 115                         relh=hdir[0]!='/';
 116                         if (!relh) {
 117                                 safestrncpy(webcitdir, hdir, sizeof webcitdir);
 118                         }
 119                         else {
 120                                 safestrncpy(relhome, relhome, sizeof relhome);
 121                         }
 122                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 123                         home=1;
 124                         break;
 125                 case 'd':
 126                         running_as_daemon = 1;
 127                         break;
 128                 case 'D':
 129                         pidfile = strdup(optarg);
 130                         running_as_daemon = 1;
 131                         break;
 132                 case 'g':
 133                         default_landing_page = strdup(optarg);
 134                         break;
 135                 case 'B': /* Basesize */
 136                         basesize = atoi(optarg);
 137                         if (basesize > 2)
 138                                 StartLibCitadel(basesize);
 139                         break;
 140                 case 'i':
 141                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 142                         break;
 143                 case 'p':
 144                         http_port = atoi(optarg);
 145                         if (http_port == 0) {
 146                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 147                         }
 148                         break;
 149                 case 't':
 150                         /* no longer used, but ignored so old scripts don't break */
 151                         break;
 152                 case 'T':
 153                         LoadTemplates = atoi(optarg);
 154                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 155                         dbg_backtrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 156                         break;
 157                 case 'Z':
 158                         DisableGzip = 1;
 159                         break;
 160                 case 'x':
 161                         /* no longer used, but ignored so old scripts don't break */
 162                         break;
 163                 case 'f':
 164                         follow_xff = 1;
 165                         break;
 166                 case 'c':
 167                         server_cookie = malloc(256);
 168                         if (server_cookie != NULL) {
 169                                 safestrncpy(server_cookie,
 170                                        "Set-cookie: wcserver=",
 171                                         256);
 172                                 if (gethostname
 173                                     (&server_cookie[strlen(server_cookie)],
 174                                      200) != 0) {
 175                                         syslog(2, "gethostname: %s", strerror(errno));
 176                                         free(server_cookie);
 177                                 }
 178                         }
 179                         break;
 180 #ifdef HAVE_OPENSSL
 181                 case 's':
 182                         is_https = 1;
 183                         break;
 184                 case 'S':
 185                         is_https = 1;
 186                         ssl_cipher_list = strdup(optarg);
 187                         break;
 188 #endif
 189                 case 'G':
 190                         DumpTemplateI18NStrings = 1;
 191                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 192                         I18nDumpFile = optarg;
 193                         break;
 194                 default:
 195                         fprintf(stderr, "usage: webcit "
 196                                 "[-i ip_addr] [-p http_port] "
 197                                 "[-c] [-f] "
 198                                 "[-T Templatedebuglevel] "
 199                                 "[-d] [-Z] [-G i18ndumpfile] "
 200 #ifdef HAVE_OPENSSL
 201                                 "[-s] [-S cipher_suites]"
 202 #endif
 203                                 "[remotehost [remoteport]]\n");
 204                         return 1;
 205                 }
 206
 207         /* Start the logger */
 208         openlog("webcit",
 209                 ( running_as_daemon ? (LOG_PID) : (LOG_PID | LOG_PERROR) ),
 210                 LOG_DAEMON
 211         );
 212
 213         if (optind < argc) {
 214                 ctdlhost = argv[optind];
 215                 if (++optind < argc)
 216                         ctdlport = argv[optind];
 217         }
 218
 219         /* daemonize, if we were asked to */
 220         if (!DumpTemplateI18NStrings && running_as_daemon) {
 221                 start_daemon(pidfile);
 222         }
 223         else {
 224                 signal(SIGINT, graceful_shutdown);
 225                 signal(SIGHUP, graceful_shutdown);
 226         }
 227
 228         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 229         LoadIconDir(static_icon_dir);
 230
 231         /* Tell 'em who's in da house */
 232         syslog(1, "%s", PACKAGE_STRING);
 233         syslog(1, "Copyright (C) 1996-2012 by the citadel.org team");
 234         syslog(1, " ");
 235         syslog(1, "This program is open source software: you can redistribute it and/or");
 236         syslog(1, "modify it under the terms of the GNU General Public License as published");
 237         syslog(1, "by the Free Software Foundation, either version 3 of the License, or");
 238         syslog(1, "(at your option) any later version.");
 239         syslog(1, " ");
 240         syslog(1, "This program is distributed in the hope that it will be useful,");
 241         syslog(1, "but WITHOUT ANY WARRANTY; without even the implied warranty of");
 242         syslog(1, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the");
 243         syslog(1, "GNU General Public License for more details.");
 244         syslog(1, " ");
 245         syslog(1, "You should have received a copy of the GNU General Public License");
 246         syslog(1, "along with this program.  If not, see <http://www.gnu.org/licenses/>.");
 247         syslog(1, " ");
 248
 249
 250         /* initialize various subsystems */
 251
 252         initialise_modules();
 253         initialise2_modules();
 254         InitTemplateCache();
 255         if (DumpTemplateI18NStrings) {
 256                 FILE *fd;
 257                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 258                 if (StrLength(I18nDump) < 50) {
 259                         syslog(1, "*******************************************************************\n");
 260                         syslog(1, "*   No strings found in templates!  Are you sure they're there?   *\n");
 261                         syslog(1, "*******************************************************************\n");
 262                         return -1;
 263                 }
 264                 fd = fopen(I18nDumpFile, "w");
 265                 if (fd == NULL) {
 266                         syslog(1, "***********************************************\n");
 267                         syslog(1, "*   unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 268                         syslog(1, "***********************************************\n");
 269                         return -1;
 270                 }
 271                 fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 272                 fclose(fd);
 273                 return 0;
 274         }
 275
 276         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 277         icalerror_errors_are_fatal = 0;
 278
 279         /* Use our own prefix on tzid's generated from system tzdata */
 280         icaltimezone_set_tzid_prefix("/citadel.org/");
 281
 282         /*
 283          * Set up a place to put thread-specific data.
 284          * We only need a single pointer per thread - it points to the
 285          * wcsession struct to which the thread is currently bound.
 286          */
 287         if (pthread_key_create(&MyConKey, NULL) != 0) {
 288                 syslog(1, "Can't create TSD key: %s", strerror(errno));
 289         }
 290         InitialiseSemaphores();
 291
 292         /*
 293          * Set up a place to put thread-specific SSL data.
 294          * We don't stick this in the wcsession struct because SSL starts
 295          * up before the session is bound, and it gets torn down between
 296          * transactions.
 297          */
 298 #ifdef HAVE_OPENSSL
 299         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 300                 syslog(1, "Can't create TSD key: %s", strerror(errno));
 301         }
 302 #endif
 303
 304         /*
 305          * Bind the server to our favorite port.
 306          * There is no need to check for errors, because webcit_tcp_server()
 307          * exits if it doesn't succeed.
 308          */
 309
 310         if (!IsEmptyStr(uds_listen_path)) {
 311                 syslog(2, "Attempting to create listener socket at %s...", uds_listen_path);
 312                 msock = webcit_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 313         }
 314         else {
 315                 syslog(2, "Attempting to bind to port %d...", http_port);
 316                 msock = webcit_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 317         }
 318         if (msock < 0)
 319         {
 320                 ShutDownWebcit();
 321                 return -msock;
 322         }
 323
 324         syslog(2, "Listening on socket %d", msock);
 325         signal(SIGPIPE, SIG_IGN);
 326
 327         pthread_mutex_init(&SessionListMutex, NULL);
 328
 329         /*
 330          * Start up the housekeeping thread
 331          */
 332         pthread_attr_init(&attr);
 333         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 334         pthread_create(&SessThread, &attr, (void *(*)(void *)) housekeeping_loop, NULL);
 335
 336         /*
 337          * If this is an HTTPS server, fire up SSL
 338          */
 339 #ifdef HAVE_OPENSSL
 340         if (is_https) {
 341                 init_ssl();
 342         }
 343 #endif
 344         drop_root(UID);
 345
 346         /* Become a worker thread.  More worker threads will be spawned as they are needed. */
 347         worker_entry();
 348         ShutDownLibCitadel();
 349         return 0;
 350 }
 351
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