main.c

   1 /*
   2  * uhttpd - Tiny single-threaded httpd
   3  *
   4  *   Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
   5  *   Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   6  *
   7  *  Licensed under the Apache License, Version 2.0 (the "License");
   8  *  you may not use this file except in compliance with the License.
   9  *  You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  *  Unless required by applicable law or agreed to in writing, software
  14  *  distributed under the License is distributed on an "AS IS" BASIS,
  15  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  *  See the License for the specific language governing permissions and
  17  *  limitations under the License.
  18  */
  19
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <netinet/in.h>
  23
  24 #include <getopt.h>
  25 #include <errno.h>
  26 #include <netdb.h>
  27 #include <signal.h>
  28
  29 #include <libubox/usock.h>
  30
  31 #include "uhttpd.h"
  32
  33
  34 static int run_server(void)
  35 {
  36         uloop_init();
  37         uh_setup_listeners();
  38         uloop_run();
  39
  40         return 0;
  41 }
  42
  43 static void uh_config_parse(void)
  44 {
  45         const char *path = conf.file;
  46         FILE *c;
  47         char line[512];
  48         char *col1;
  49         char *col2;
  50         char *eol;
  51
  52         if (!path)
  53                 path = "/etc/httpd.conf";
  54
  55         c = fopen(path, "r");
  56         if (!c)
  57                 return;
  58
  59         memset(line, 0, sizeof(line));
  60
  61         while (fgets(line, sizeof(line) - 1, c)) {
  62                 if ((line[0] == '/') && (strchr(line, ':') != NULL)) {
  63                         if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
  64                                 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
  65                                 !(eol = strchr(col2, '\n')) || (*eol++  = 0))
  66                                 continue;
  67
  68                         uh_auth_add(line, col1, col2);
  69                 } else if (!strncmp(line, "I:", 2)) {
  70                         if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
  71                                 !(eol = strchr(col1, '\n')) || (*eol++  = 0))
  72                                 continue;
  73
  74                         uh_index_add(strdup(col1));
  75                 } else if (!strncmp(line, "E404:", 5)) {
  76                         if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
  77                                 !(eol = strchr(col1, '\n')) || (*eol++  = 0))
  78                                 continue;
  79
  80                         conf.error_handler = strdup(col1);
  81                 }
  82 #ifdef HAVE_CGI
  83                 else if ((line[0] == '*') && (strchr(line, ':') != NULL)) {
  84                         if (!(col1 = strchr(line, '*')) || (*col1++ = 0) ||
  85                                 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
  86                                 !(eol = strchr(col2, '\n')) || (*eol++  = 0))
  87                                 continue;
  88
  89                         if (!uh_interpreter_add(col1, col2))
  90                                 fprintf(stderr,
  91                                                 "Unable to add interpreter %s for extension %s: "
  92                                                 "Out of memory\n", col2, col1
  93                                 );
  94                 }
  95 #endif
  96         }
  97
  98         fclose(c);
  99 }
 100
 101 static void add_listener_arg(char *arg, bool tls)
 102 {
 103         char *host = NULL;
 104         char *port = arg;
 105         char *s;
 106
 107         s = strrchr(arg, ':');
 108         if (s) {
 109                 host = arg;
 110                 port = s + 1;
 111                 *s = 0;
 112         }
 113         uh_socket_bind(host, port, tls);
 114 }
 115
 116 static int usage(const char *name)
 117 {
 118         fprintf(stderr, "Usage: %s -p <port>\n", name);
 119         return 1;
 120 }
 121
 122 static void init_defaults(void)
 123 {
 124         conf.network_timeout = 30;
 125         conf.http_keepalive = 0; /* fixme */
 126         conf.max_requests = 3;
 127
 128         uh_index_add("index.html");
 129         uh_index_add("index.htm");
 130         uh_index_add("default.html");
 131         uh_index_add("default.htm");
 132 }
 133
 134 int main(int argc, char **argv)
 135 {
 136         bool nofork = false;
 137         char *port;
 138         int opt, ch;
 139
 140         init_defaults();
 141         signal(SIGPIPE, SIG_IGN);
 142
 143         while ((ch = getopt(argc, argv, "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:n:x:i:t:T:A:u:U:")) != -1) {
 144                 bool tls = false;
 145
 146                 switch(ch) {
 147                 case 's':
 148                         tls = true;
 149                         /* fall through */
 150                 case 'p':
 151                         add_listener_arg(optarg, tls);
 152                         break;
 153
 154                 case 'h':
 155                         if (!realpath(optarg, conf.docroot)) {
 156                                 fprintf(stderr, "Error: Invalid directory %s: %s\n",
 157                                                 optarg, strerror(errno));
 158                                 exit(1);
 159                         }
 160                         break;
 161
 162                 case 'E':
 163                         if (optarg[0] != '/') {
 164                                 fprintf(stderr, "Error: Invalid error handler: %s\n",
 165                                                 optarg);
 166                                 exit(1);
 167                         }
 168                         conf.error_handler = optarg;
 169                         break;
 170
 171                 case 'I':
 172                         if (optarg[0] == '/') {
 173                                 fprintf(stderr, "Error: Invalid index page: %s\n",
 174                                                 optarg);
 175                                 exit(1);
 176                         }
 177                         uh_index_add(optarg);
 178                         break;
 179
 180                 case 'S':
 181                         conf.no_symlinks = 1;
 182                         break;
 183
 184                 case 'D':
 185                         conf.no_dirlists = 1;
 186                         break;
 187
 188                 case 'R':
 189                         conf.rfc1918_filter = 1;
 190                         break;
 191
 192                 case 'n':
 193                         conf.max_requests = atoi(optarg);
 194                         break;
 195
 196                 case 't':
 197                         conf.script_timeout = atoi(optarg);
 198                         break;
 199
 200                 case 'T':
 201                         conf.network_timeout = atoi(optarg);
 202                         break;
 203
 204                 case 'A':
 205                         conf.tcp_keepalive = atoi(optarg);
 206                         break;
 207
 208                 case 'f':
 209                         nofork = 1;
 210                         break;
 211
 212                 case 'd':
 213                         port = alloca(strlen(optarg) + 1);
 214                         if (!port)
 215                                 return -1;
 216
 217                         /* "decode" plus to space to retain compat */
 218                         for (opt = 0; optarg[opt]; opt++)
 219                                 if (optarg[opt] == '+')
 220                                         optarg[opt] = ' ';
 221
 222                         /* opt now contains strlen(optarg) -- no need to re-scan */
 223                         if (uh_urldecode(port, opt, optarg, opt) < 0) {
 224                                 fprintf(stderr, "uhttpd: invalid encoding\n");
 225                                 return -1;
 226                         }
 227
 228                         printf("%s", port);
 229                         break;
 230
 231                 /* basic auth realm */
 232                 case 'r':
 233                         conf.realm = optarg;
 234                         break;
 235
 236                 /* md5 crypt */
 237                 case 'm':
 238                         printf("%s\n", crypt(optarg, "$1$"));
 239                         return 0;
 240                         break;
 241
 242                 /* config file */
 243                 case 'c':
 244                         conf.file = optarg;
 245                         break;
 246
 247                 default:
 248                         return usage(argv[0]);
 249                 }
 250         }
 251
 252         uh_config_parse();
 253
 254         return run_server();
 255 }