2 * uhttpd - Tiny single-threaded httpd
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #define _XOPEN_SOURCE 700
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <netinet/in.h>
32 #include <libubox/usock.h>
39 static int run_server(void)
43 uh_plugin_post_init();
49 static void uh_config_parse(void)
51 const char *path = conf.file;
59 path = "/etc/httpd.conf";
65 memset(line, 0, sizeof(line));
67 while (fgets(line, sizeof(line) - 1, c)) {
68 if ((line[0] == '/') && (strchr(line, ':') != NULL)) {
69 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
70 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
71 !(eol = strchr(col2, '\n')) || (*eol++ = 0))
74 uh_auth_add(line, col1, col2);
75 } else if (!strncmp(line, "I:", 2)) {
76 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
77 !(eol = strchr(col1, '\n')) || (*eol++ = 0))
80 uh_index_add(strdup(col1));
81 } else if (!strncmp(line, "E404:", 5)) {
82 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
83 !(eol = strchr(col1, '\n')) || (*eol++ = 0))
86 conf.error_handler = strdup(col1);
88 else if ((line[0] == '*') && (strchr(line, ':') != NULL)) {
89 if (!(col1 = strchr(line, '*')) || (*col1++ = 0) ||
90 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
91 !(eol = strchr(col2, '\n')) || (*eol++ = 0))
94 uh_interpreter_add(col1, col2);
101 static int add_listener_arg(char *arg, bool tls)
107 s = strrchr(arg, ':');
114 return uh_socket_bind(host, port, tls);
117 static int usage(const char *name)
120 "Usage: %s -p [addr:]port -h docroot\n"
121 " -f Do not fork to background\n"
122 " -c file Configuration file, default is '/etc/httpd.conf'\n"
123 " -p [addr:]port Bind to specified address and port, multiple allowed\n"
125 " -s [addr:]port Like -p but provide HTTPS on this port\n"
126 " -C file ASN.1 server certificate file\n"
127 " -K file ASN.1 server private key file\n"
129 " -h directory Specify the document root, default is '.'\n"
130 " -E string Use given virtual URL as 404 error handler\n"
131 " -I string Use given filename as index for directories, multiple allowed\n"
132 " -S Do not follow symbolic links outside of the docroot\n"
133 " -D Do not allow directory listings, send 403 instead\n"
134 " -R Enable RFC1918 filter\n"
135 " -n count Maximum allowed number of concurrent script requests\n"
136 " -N count Maximum allowed number of concurrent connections\n"
138 " -l string URL prefix for Lua handler, default is '/lua'\n"
139 " -L file Lua handler script, omit to disable Lua\n"
142 " -u string URL prefix for UBUS via JSON-RPC handler\n"
143 " -U file Override ubus socket path\n"
144 " -a Do not authenticate JSON-RPC requests against UBUS session api\n"
146 " -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
147 " -i .ext=path Use interpreter at path for files with the given extension\n"
148 " -t seconds CGI, Lua and UBUS script timeout in seconds, default is 60\n"
149 " -T seconds Network timeout in seconds, default is 30\n"
150 " -k seconds HTTP keepalive timeout\n"
151 " -d string URL decode given string\n"
152 " -r string Specify basic auth realm\n"
153 " -m string MD5 crypt given string\n"
159 static void init_defaults(void)
161 conf.script_timeout = 60;
162 conf.network_timeout = 30;
163 conf.http_keepalive = 20;
164 conf.max_script_requests = 3;
165 conf.max_connections = 100;
166 conf.realm = "Protected Area";
167 conf.cgi_prefix = "/cgi-bin";
168 conf.cgi_path = "/sbin:/usr/sbin:/bin:/usr/bin";
170 uh_index_add("index.html");
171 uh_index_add("index.htm");
172 uh_index_add("default.html");
173 uh_index_add("default.htm");
176 static void fixup_prefix(char *str)
183 len = strlen(str) - 1;
185 while (len > 0 && str[len] == '/')
191 int main(int argc, char **argv)
201 const char *tls_key = NULL, *tls_crt = NULL;
204 BUILD_BUG_ON(sizeof(uh_buf) < PATH_MAX);
206 uh_dispatch_add(&cgi_dispatch);
208 signal(SIGPIPE, SIG_IGN);
210 while ((ch = getopt(argc, argv, "afSDRC:K:E:I:p:s:h:c:l:L:d:r:m:n:N:x:i:t:k:T:A:u:U:")) != -1) {
228 fprintf(stderr, "uhttpd: TLS support not compiled, "
229 "ignoring -%c\n", opt);
233 bound += add_listener_arg(optarg, (ch == 's'));
237 if (!realpath(optarg, uh_buf)) {
238 fprintf(stderr, "Error: Invalid directory %s: %s\n",
239 optarg, strerror(errno));
242 conf.docroot = strdup(uh_buf);
246 if (optarg[0] != '/') {
247 fprintf(stderr, "Error: Invalid error handler: %s\n",
251 conf.error_handler = optarg;
255 if (optarg[0] == '/') {
256 fprintf(stderr, "Error: Invalid index page: %s\n",
260 uh_index_add(optarg);
264 conf.no_symlinks = 1;
268 conf.no_dirlists = 1;
272 conf.rfc1918_filter = 1;
276 conf.max_script_requests = atoi(optarg);
280 conf.max_connections = atoi(optarg);
284 fixup_prefix(optarg);
285 conf.cgi_prefix = optarg;
289 port = strchr(optarg, '=');
290 if (optarg[0] != '.' || !port) {
291 fprintf(stderr, "Error: Invalid interpreter: %s\n",
297 uh_interpreter_add(optarg, port);
301 conf.script_timeout = atoi(optarg);
305 conf.network_timeout = atoi(optarg);
309 conf.http_keepalive = atoi(optarg);
313 conf.tcp_keepalive = atoi(optarg);
321 port = alloca(strlen(optarg) + 1);
325 /* "decode" plus to space to retain compat */
326 for (opt = 0; optarg[opt]; opt++)
327 if (optarg[opt] == '+')
330 /* opt now contains strlen(optarg) -- no need to re-scan */
331 if (uh_urldecode(port, opt, optarg, opt) < 0) {
332 fprintf(stderr, "uhttpd: invalid encoding\n");
339 /* basic auth realm */
346 printf("%s\n", crypt(optarg, "$1$"));
357 conf.lua_prefix = optarg;
361 conf.lua_handler = optarg;
366 fprintf(stderr, "uhttpd: Lua support not compiled, "
367 "ignoring -%c\n", opt);
372 conf.ubus_noauth = 1;
376 conf.ubus_prefix = optarg;
380 conf.ubus_socket = optarg;
386 fprintf(stderr, "uhttpd: UBUS support not compiled, "
387 "ignoring -%c\n", opt);
391 return usage(argv[0]);
398 fprintf(stderr, "Error: No sockets bound, unable to continue\n");
403 if (!realpath(".", uh_buf)) {
404 fprintf(stderr, "Error: Unable to determine work dir\n");
407 conf.docroot = strdup(uh_buf);
412 if (!tls_crt || !tls_key) {
413 fprintf(stderr, "Please specify a certificate and "
414 "a key file to enable SSL support\n");
418 if (uh_tls_init(tls_key, tls_crt))
424 if (conf.lua_handler || conf.lua_prefix) {
425 if (!conf.lua_handler || !conf.lua_prefix) {
426 fprintf(stderr, "Need handler and prefix to enable Lua support\n");
429 if (uh_plugin_init("uhttpd_lua.so"))
434 if (conf.ubus_prefix && uh_plugin_init("uhttpd_ubus.so"))
438 /* fork (if not disabled) */
450 cur_fd = open("/dev/null", O_WRONLY);