webcit/webserver.c

   1 /*
   2  * This contains a simple multithreaded TCP server manager.  It sits around
   3  * waiting on the specified port for incoming HTTP connections.  When a
   4  * connection is established, it calls context_loop() from context_loop.c.
   5  *
   6  * Copyright (c) 1996-2010 by the citadel.org developers.
   7  * This program is released under the terms of the GNU General Public License v3.
   8  *
   9  */
  10
  11 #include "webcit.h"
  12 #include "webserver.h"
  13
  14 #include "modules_init.h"
  15 #ifndef HAVE_SNPRINTF
  16 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  17 #endif
  18
  19
  20 extern int msock;                       /* master listening socket */
  21 extern int verbosity;           /* Logging level */
  22 extern char static_icon_dir[PATH_MAX];          /* where should we find our mime icons */
  23 extern long MaxRead;
  24 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  25 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  26 int home_specified = 0;         /* did the user specify a homedir? */
  27 int DisableGzip = 0;
  28 extern pthread_mutex_t SessionListMutex;
  29 extern pthread_key_t MyConKey;
  30
  31 extern void *housekeeping_loop(void);
  32 extern int webcit_tcp_server(char *ip_addr, int port_number, int queue_len);
  33 extern int webcit_uds_server(char *sockpath, int queue_len);
  34 extern void graceful_shutdown_watcher(int signum);
  35 extern void graceful_shutdown(int signum);
  36 extern void start_daemon(char *pid_file);
  37 extern void webcit_calc_dirs_n_files(int relh, const char *basedir, int home, char *webcitdir, char *relhome);
  38
  39 extern void drop_root(uid_t UID);
  40
  41 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  42
  43 char *server_cookie = NULL;     /* our Cookie connection to the client */
  44 int http_port = PORT_NUM;       /* Port to listen on */
  45 char *ctdlhost = DEFAULT_HOST;  /* our name */
  46 char *ctdlport = DEFAULT_PORT;  /* our Port */
  47 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  48 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  49 int running_as_daemon = 0;      /* should we deamonize on startup? */
  50
  51
  52
  53 /* #define DBG_PRINNT_HOOKS_AT_START */
  54 #ifdef DBG_PRINNT_HOOKS_AT_START
  55 extern HashList *HandlerHash;
  56 const char foobuf[32];
  57 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
  58 #endif
  59 extern int dbg_analyze_msg;
  60 extern int dbg_backtrace_template_errors;
  61 extern int DumpTemplateI18NStrings;
  62 extern StrBuf *I18nDump;
  63 void InitTemplateCache(void);
  64 extern int LoadTemplates;
  65
  66
  67
  68
  69 /*
  70  * Here's where it all begins.
  71  */
  72 int main(int argc, char **argv)
  73 {
  74         uid_t UID = -1;
  75         size_t basesize = 2;            /* how big should strbufs be on creation? */
  76         pthread_t SessThread;           /* Thread descriptor */
  77         pthread_attr_t attr;            /* Thread attributes */
  78         int a;                          /* General-purpose variable */
  79         char tracefile[PATH_MAX];
  80         char ip_addr[256]="*";
  81         int relh=0;
  82         int home=0;
  83         int home_specified=0;
  84         char relhome[PATH_MAX]="";
  85         char webcitdir[PATH_MAX] = DATADIR;
  86         char *pidfile = NULL;
  87         char *hdir;
  88         const char *basedir = NULL;
  89         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
  90         const char *I18nDumpFile = NULL;
  91         FILE *rvfp = NULL;
  92         int rv = 0;
  93
  94         WildFireInitBacktrace(argv[0], 2);
  95
  96         start_modules ();
  97
  98 #ifdef DBG_PRINNT_HOOKS_AT_START
  99 /*      dbg_PrintHash(HandlerHash, nix, NULL);*/
 100 #endif
 101
 102         /* Ensure that we are linked to the correct version of libcitadel */
 103         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 104                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 105                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 106                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 107                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 108                 return(1);
 109         }
 110
 111         strcpy(uds_listen_path, "");
 112
 113         /* Parse command line */
 114 #ifdef HAVE_OPENSSL
 115         while ((a = getopt(argc, argv, "R:u:h:i:p:t:T:B:x:dD:G:cfsS:Z")) != EOF)
 116 #else
 117         while ((a = getopt(argc, argv, "R:u:h:i:p:t:T:B:x:dD:G:cfZ")) != EOF)
 118 #endif
 119                 switch (a) {
 120                 case 'u':
 121                         UID = atol(optarg);
 122                         break;
 123                 case 'h':
 124                         hdir = strdup(optarg);
 125                         relh=hdir[0]!='/';
 126                         if (!relh) {
 127                                 safestrncpy(webcitdir, hdir, sizeof webcitdir);
 128                         }
 129                         else {
 130                                 safestrncpy(relhome, relhome, sizeof relhome);
 131                         }
 132                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 133                         home_specified = 1;
 134                         home=1;
 135                         break;
 136                 case 'd':
 137                         running_as_daemon = 1;
 138                         break;
 139                 case 'D':
 140                         pidfile = strdup(optarg);
 141                         running_as_daemon = 1;
 142                         break;
 143                 case 'B': /* Basesize */
 144                         basesize = atoi(optarg);
 145                         if (basesize > 2)
 146                                 StartLibCitadel(basesize);
 147                         break;
 148                 case 'i':
 149                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 150                         break;
 151                 case 'p':
 152                         http_port = atoi(optarg);
 153                         if (http_port == 0) {
 154                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 155                         }
 156                         break;
 157                 case 't':
 158                         safestrncpy(tracefile, optarg, sizeof tracefile);
 159                         rvfp = freopen(tracefile, "w", stdout);
 160                         rvfp = freopen(tracefile, "w", stderr);
 161                         rvfp = freopen(tracefile, "r", stdin);
 162                         break;
 163                 case 'T':
 164                         LoadTemplates = atoi(optarg);
 165                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 166                         dbg_backtrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 167                         break;
 168                 case 'Z':
 169                         DisableGzip = 1;
 170                         break;
 171                 case 'x':
 172                         verbosity = atoi(optarg);
 173                         break;
 174                 case 'f':
 175                         follow_xff = 1;
 176                         break;
 177                 case 'c':
 178                         server_cookie = malloc(256);
 179                         if (server_cookie != NULL) {
 180                                 safestrncpy(server_cookie,
 181                                        "Set-cookie: wcserver=",
 182                                         256);
 183                                 if (gethostname
 184                                     (&server_cookie[strlen(server_cookie)],
 185                                      200) != 0) {
 186                                         lprintf(2, "gethostname: %s\n",
 187                                                 strerror(errno));
 188                                         free(server_cookie);
 189                                 }
 190                         }
 191                         break;
 192 #ifdef HAVE_OPENSSL
 193                 case 's':
 194                         is_https = 1;
 195                         break;
 196                 case 'S':
 197                         is_https = 1;
 198                         ssl_cipher_list = strdup(optarg);
 199                         break;
 200 #endif
 201                 case 'G':
 202                         DumpTemplateI18NStrings = 1;
 203                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 204                         I18nDumpFile = optarg;
 205                         break;
 206                 case 'R':
 207                         MaxRead = atol(optarg);
 208                         break;
 209                 default:
 210                         fprintf(stderr, "usage: webcit "
 211                                 "[-i ip_addr] [-p http_port] "
 212                                 "[-t tracefile] [-c] [-f] "
 213                                 "[-T Templatedebuglevel] "
 214                                 "[-d] [-Z] [-G i18ndumpfile] "
 215 #ifdef HAVE_OPENSSL
 216                                 "[-s] [-S cipher_suites]"
 217 #endif
 218                                 "[remotehost [remoteport]]\n");
 219                         return 1;
 220                 }
 221
 222         if (optind < argc) {
 223                 ctdlhost = argv[optind];
 224                 if (++optind < argc)
 225                         ctdlport = argv[optind];
 226         }
 227
 228         /* daemonize, if we were asked to */
 229         if (!DumpTemplateI18NStrings && running_as_daemon) {
 230                 start_daemon(pidfile);
 231         }
 232         else {
 233                 signal(SIGINT, graceful_shutdown);
 234                 signal(SIGHUP, graceful_shutdown);
 235         }
 236
 237         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 238         LoadIconDir(static_icon_dir);
 239
 240         /* Tell 'em who's in da house */
 241         lprintf(1, PACKAGE_STRING "\n");
 242         lprintf(1, "Copyright (C) 1996-2010 by the Citadel development team.\n"
 243                 "This software is distributed under the terms of the "
 244                 "GNU General Public License.\n\n"
 245         );
 246
 247
 248         /* initialize the International Bright Young Thing */
 249
 250         initialise_modules();
 251
 252         InitTemplateCache();
 253         if (DumpTemplateI18NStrings) {
 254                 FILE *fd;
 255                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 256                 if (StrLength(I18nDump) < 50) {
 257                         lprintf(1, "********************************************************************************\n");
 258                         lprintf(1, "*        No strings found in templates!  Are you sure they're there?           *\n");
 259                         lprintf(1, "********************************************************************************\n");
 260                         return -1;
 261                 }
 262                 fd = fopen(I18nDumpFile, "w");
 263                 if (fd == NULL) {
 264                         lprintf(1, "********************************************************************************\n");
 265                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 266                         lprintf(1, "********************************************************************************\n");
 267                         return -1;
 268                 }
 269                 rv = fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 270                 fclose(fd);
 271                 return 0;
 272         }
 273
 274
 275         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 276         icalerror_errors_are_fatal = 0;
 277
 278         /* Use our own prefix on tzid's generated from system tzdata */
 279         icaltimezone_set_tzid_prefix("/citadel.org/");
 280
 281         /*
 282          * Set up a place to put thread-specific data.
 283          * We only need a single pointer per thread - it points to the
 284          * wcsession struct to which the thread is currently bound.
 285          */
 286         if (pthread_key_create(&MyConKey, NULL) != 0) {
 287                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 288         }
 289         InitialiseSemaphores ();
 290
 291         /*
 292          * Set up a place to put thread-specific SSL data.
 293          * We don't stick this in the wcsession struct because SSL starts
 294          * up before the session is bound, and it gets torn down between
 295          * transactions.
 296          */
 297 #ifdef HAVE_OPENSSL
 298         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 299                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 300         }
 301 #endif
 302
 303         /*
 304          * Bind the server to our favorite port.
 305          * There is no need to check for errors, because webcit_tcp_server()
 306          * exits if it doesn't succeed.
 307          */
 308
 309         if (!IsEmptyStr(uds_listen_path)) {
 310                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 311                 msock = webcit_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 312         }
 313         else {
 314                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 315                 msock = webcit_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 316         }
 317         if (msock < 0)
 318         {
 319                 ShutDownWebcit();
 320                 return -msock;
 321         }
 322
 323         lprintf(2, "Listening on socket %d\n", msock);
 324         signal(SIGPIPE, SIG_IGN);
 325
 326         pthread_mutex_init(&SessionListMutex, NULL);
 327
 328         /*
 329          * Start up the housekeeping thread
 330          */
 331         pthread_attr_init(&attr);
 332         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 333         pthread_create(&SessThread, &attr,
 334                        (void *(*)(void *)) housekeeping_loop, NULL);
 335
 336
 337         /*
 338          * If this is an HTTPS server, fire up SSL
 339          */
 340 #ifdef HAVE_OPENSSL
 341         if (is_https) {
 342                 init_ssl();
 343         }
 344 #endif
 345         drop_root(UID);
 346
 347         /* Become a worker thread.  More worker threads will be spawned as they are needed. */
 348         worker_entry();
 349         ShutDownLibCitadel ();
 350         return 0;
 351 }
 352
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