webcit/webserver.c

   1 /*
   2  * Copyright (c) 1996-2013 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
  18 extern int msock;                               /* master listening socket */
  19 extern char static_icon_dir[PATH_MAX];          /* where should we find our mime icons */
  20 int is_https = 0;                               /* Nonzero if I am an HTTPS service */
  21 int follow_xff = 0;                             /* Follow X-Forwarded-For: header? */
  22 int DisableGzip = 0;
  23 char *default_landing_page = NULL;
  24 extern pthread_mutex_t SessionListMutex;
  25 extern pthread_key_t MyConKey;
  26
  27 extern void *housekeeping_loop(void);
  28 extern int webcit_tcp_server(char *ip_addr, int port_number, int queue_len);
  29 extern int webcit_uds_server(char *sockpath, int queue_len);
  30 extern void graceful_shutdown_watcher(int signum);
  31 extern void graceful_shutdown(int signum);
  32 extern void start_daemon(char *pid_file);
  33 extern void webcit_calc_dirs_n_files(int relh, const char *basedir, int home, char *webcitdir, char *relhome);
  34 extern void worker_entry(void);
  35 extern void drop_root(uid_t UID);
  36
  37 char socket_dir[PATH_MAX];      /* where to talk to our citadel server */
  38 char *server_cookie = NULL;     /* our Cookie connection to the client */
  39 int http_port = PORT_NUM;       /* Port to listen on */
  40 char *ctdlhost = DEFAULT_HOST;  /* Host name or IP address of Citadel server */
  41 char *ctdlport = DEFAULT_PORT;  /* Port number of Citadel server */
  42 int setup_wizard = 0;           /* should we run the setup wizard? */
  43 char wizard_filename[PATH_MAX]; /* location of file containing the last webcit version against which we ran setup wizard */
  44 int running_as_daemon = 0;      /* should we deamonize on startup? */
  45
  46 /* #define DBG_PRINNT_HOOKS_AT_START */
  47 #ifdef DBG_PRINNT_HOOKS_AT_START
  48 extern HashList *HandlerHash;
  49 const char foobuf[32];
  50 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
  51 #endif
  52 extern int dbg_analyze_msg;
  53 extern int dbg_backtrace_template_errors;
  54 extern int DumpTemplateI18NStrings;
  55 extern StrBuf *I18nDump;
  56 void InitTemplateCache(void);
  57 extern int LoadTemplates;
  58
  59 void LoadMimeBlacklist(void);
  60
  61 /*
  62  * Here's where it all begins.
  63  */
  64 int main(int argc, char **argv)
  65 {
  66         uid_t UID = -1;
  67         size_t basesize = 2;            /* how big should strbufs be on creation? */
  68         pthread_t SessThread;           /* Thread descriptor */
  69         pthread_attr_t attr;            /* Thread attributes */
  70         int a;                          /* General-purpose variable */
  71         char ip_addr[256]="*";
  72         int relh=0;
  73         int home=0;
  74         char relhome[PATH_MAX]="";
  75         char webcitdir[PATH_MAX] = DATADIR;
  76         char *pidfile = NULL;
  77         char *hdir;
  78         const char *basedir = NULL;
  79         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
  80         const char *I18nDumpFile = NULL;
  81
  82         WildFireInitBacktrace(argv[0], 2);
  83
  84         start_modules();
  85
  86 #ifdef DBG_PRINNT_HOOKS_AT_START
  87 /*      dbg_PrintHash(HandlerHash, nix, NULL);*/
  88 #endif
  89
  90         /* Ensure that we are linked to the correct version of libcitadel */
  91         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
  92                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
  93                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
  94                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
  95                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
  96                 return(1);
  97         }
  98
  99         strcpy(uds_listen_path, "");
 100
 101         /* Parse command line */
 102 #ifdef HAVE_OPENSSL
 103         while ((a = getopt(argc, argv, "u:h:i:p:t:T:B:x:g:dD:G:cfsS:Z")) != EOF)
 104 #else
 105         while ((a = getopt(argc, argv, "u:h:i:p:t:T:B:x:g:dD:G:cfZ")) != EOF)
 106 #endif
 107                 switch (a) {
 108                 case 'u':
 109                         UID = atol(optarg);
 110                         break;
 111                 case 'h':
 112                         hdir = strdup(optarg);
 113                         relh=hdir[0]!='/';
 114                         if (!relh) {
 115                                 safestrncpy(webcitdir, hdir, sizeof webcitdir);
 116                         }
 117                         else {
 118                                 safestrncpy(relhome, relhome, sizeof relhome);
 119                         }
 120                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 121                         home=1;
 122                         break;
 123                 case 'd':
 124                         running_as_daemon = 1;
 125                         break;
 126                 case 'D':
 127                         pidfile = strdup(optarg);
 128                         running_as_daemon = 1;
 129                         break;
 130                 case 'g':
 131                         default_landing_page = strdup(optarg);
 132                         break;
 133                 case 'B': /* Basesize */
 134                         basesize = atoi(optarg);
 135                         if (basesize > 2)
 136                                 StartLibCitadel(basesize);
 137                         break;
 138                 case 'i':
 139                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 140                         break;
 141                 case 'p':
 142                         http_port = atoi(optarg);
 143                         if (http_port == 0) {
 144                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 145                         }
 146                         break;
 147                 case 't':
 148                         /* no longer used, but ignored so old scripts don't break */
 149                         break;
 150                 case 'T':
 151                         LoadTemplates = atoi(optarg);
 152                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 153                         dbg_backtrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 154                         break;
 155                 case 'Z':
 156                         DisableGzip = 1;
 157                         break;
 158                 case 'x':
 159                         /* no longer used, but ignored so old scripts don't break */
 160                         break;
 161                 case 'f':
 162                         follow_xff = 1;
 163                         break;
 164                 case 'c':
 165                         server_cookie = malloc(256);
 166                         if (server_cookie != NULL) {
 167                                 safestrncpy(server_cookie,
 168                                        "Set-cookie: wcserver=",
 169                                         256);
 170                                 if (gethostname
 171                                     (&server_cookie[strlen(server_cookie)],
 172                                      200) != 0) {
 173                                         syslog(LOG_INFO, "gethostname: %s", strerror(errno));
 174                                         free(server_cookie);
 175                                 }
 176                         }
 177                         break;
 178 #ifdef HAVE_OPENSSL
 179                 case 's':
 180                         is_https = 1;
 181                         break;
 182                 case 'S':
 183                         is_https = 1;
 184                         ssl_cipher_list = strdup(optarg);
 185                         break;
 186 #endif
 187                 case 'G':
 188                         DumpTemplateI18NStrings = 1;
 189                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 190                         I18nDumpFile = optarg;
 191                         break;
 192                 default:
 193                         fprintf(stderr, "usage: webcit "
 194                                 "[-i ip_addr] [-p http_port] "
 195                                 "[-c] [-f] "
 196                                 "[-T Templatedebuglevel] "
 197                                 "[-d] [-Z] [-G i18ndumpfile] "
 198 #ifdef HAVE_OPENSSL
 199                                 "[-s] [-S cipher_suites]"
 200 #endif
 201                                 "[remotehost [remoteport]]\n");
 202                         return 1;
 203                 }
 204
 205         /* Start the logger */
 206         openlog("webcit",
 207                 ( running_as_daemon ? (LOG_PID) : (LOG_PID | LOG_PERROR) ),
 208                 LOG_DAEMON
 209         );
 210
 211         if (optind < argc) {
 212                 ctdlhost = argv[optind];
 213                 if (++optind < argc)
 214                         ctdlport = argv[optind];
 215         }
 216
 217         /* daemonize, if we were asked to */
 218         if (!DumpTemplateI18NStrings && running_as_daemon) {
 219                 start_daemon(pidfile);
 220         }
 221         else {
 222                 signal(SIGINT, graceful_shutdown);
 223                 signal(SIGHUP, graceful_shutdown);
 224         }
 225
 226         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 227         LoadMimeBlacklist();
 228         LoadIconDir(static_icon_dir);
 229
 230         /* Tell 'em who's in da house */
 231         syslog(LOG_NOTICE, "%s", PACKAGE_STRING);
 232         syslog(LOG_NOTICE, "Copyright (C) 1996-2013 by the citadel.org team");
 233         syslog(LOG_NOTICE, " ");
 234         syslog(LOG_NOTICE, "This program is open source software: you can redistribute it and/or");
 235         syslog(LOG_NOTICE, "modify it under the terms of the GNU General Public License, version 3.");
 236         syslog(LOG_NOTICE, " ");
 237         syslog(LOG_NOTICE, "This program is distributed in the hope that it will be useful,");
 238         syslog(LOG_NOTICE, "but WITHOUT ANY WARRANTY; without even the implied warranty of");
 239         syslog(LOG_NOTICE, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the");
 240         syslog(LOG_NOTICE, "GNU General Public License for more details.");
 241         syslog(LOG_NOTICE, " ");
 242
 243         /* initialize various subsystems */
 244
 245         initialise_modules();
 246         initialise2_modules();
 247         InitTemplateCache();
 248         if (DumpTemplateI18NStrings) {
 249                 FILE *fd;
 250                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 251                 if (StrLength(I18nDump) < 50) {
 252                         syslog(LOG_INFO, "*******************************************************************\n");
 253                         syslog(LOG_INFO, "*   No strings found in templates!  Are you sure they're there?   *\n");
 254                         syslog(LOG_INFO, "*******************************************************************\n");
 255                         return -1;
 256                 }
 257                 fd = fopen(I18nDumpFile, "w");
 258                 if (fd == NULL) {
 259                         syslog(LOG_INFO, "***********************************************\n");
 260                         syslog(LOG_INFO, "*   unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 261                         syslog(LOG_INFO, "***********************************************\n");
 262                         return -1;
 263                 }
 264                 fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 265                 fclose(fd);
 266                 return 0;
 267         }
 268
 269         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 270         icalerror_errors_are_fatal = 0;
 271
 272         /* Use our own prefix on tzid's generated from system tzdata */
 273         icaltimezone_set_tzid_prefix("/citadel.org/");
 274
 275         /*
 276          * Set up a place to put thread-specific data.
 277          * We only need a single pointer per thread - it points to the
 278          * wcsession struct to which the thread is currently bound.
 279          */
 280         if (pthread_key_create(&MyConKey, NULL) != 0) {
 281                 syslog(LOG_EMERG, "Can't create TSD key: %s", strerror(errno));
 282         }
 283         InitialiseSemaphores();
 284
 285         /*
 286          * Set up a place to put thread-specific SSL data.
 287          * We don't stick this in the wcsession struct because SSL starts
 288          * up before the session is bound, and it gets torn down between
 289          * transactions.
 290          */
 291 #ifdef HAVE_OPENSSL
 292         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 293                 syslog(LOG_EMERG, "Can't create TSD key: %s", strerror(errno));
 294         }
 295 #endif
 296
 297         /*
 298          * Bind the server to our favorite port.
 299          * There is no need to check for errors, because webcit_tcp_server()
 300          * exits if it doesn't succeed.
 301          */
 302
 303         if (!IsEmptyStr(uds_listen_path)) {
 304                 syslog(LOG_DEBUG, "Attempting to create listener socket at %s...", uds_listen_path);
 305                 msock = webcit_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 306         }
 307         else {
 308                 syslog(LOG_DEBUG, "Attempting to bind to port %d...", http_port);
 309                 msock = webcit_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 310         }
 311         if (msock < 0)
 312         {
 313                 ShutDownWebcit();
 314                 return -msock;
 315         }
 316
 317         syslog(LOG_INFO, "Listening on socket %d", msock);
 318         signal(SIGPIPE, SIG_IGN);
 319
 320         pthread_mutex_init(&SessionListMutex, NULL);
 321
 322         /*
 323          * Start up the housekeeping thread
 324          */
 325         pthread_attr_init(&attr);
 326         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 327         pthread_create(&SessThread, &attr, (void *(*)(void *)) housekeeping_loop, NULL);
 328
 329         /*
 330          * If this is an HTTPS server, fire up SSL
 331          */
 332 #ifdef HAVE_OPENSSL
 333         if (is_https) {
 334                 init_ssl();
 335         }
 336 #endif
 337         drop_root(UID);
 338
 339         /* Become a worker thread.  More worker threads will be spawned as they are needed. */
 340         worker_entry();
 341         ShutDownLibCitadel();
 342         return 0;
 343 }
 344
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