package/network/services/uhttpd/src/uhttpd.h

   1 /*
   2  * uhttpd - Tiny single-threaded httpd - Main header
   3  *
   4  *   Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  *  Licensed under the Apache License, Version 2.0 (the "License");
   7  *  you may not use this file except in compliance with the License.
   8  *  You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  */
  18
  19 #ifndef _UHTTPD_
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <stdbool.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <signal.h>
  27 #include <sys/types.h>
  28 #include <sys/socket.h>
  29 #include <sys/select.h>
  30 #include <sys/wait.h>
  31 #include <netinet/in.h>
  32 #include <netinet/tcp.h>
  33 #include <arpa/inet.h>
  34 #include <linux/limits.h>
  35 #include <netdb.h>
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <dlfcn.h>
  39
  40 #include <libubox/list.h>
  41 #include <libubox/uloop.h>
  42
  43
  44 #ifdef HAVE_LUA
  45 #include <lua.h>
  46 #endif
  47
  48 #ifdef HAVE_TLS
  49 #include <openssl/ssl.h>
  50 #endif
  51
  52 /* uClibc... */
  53 #ifndef SOL_TCP
  54 #define SOL_TCP 6
  55 #endif
  56
  57 #ifdef DEBUG
  58 #define D(...) fprintf(stderr, __VA_ARGS__)
  59 #else
  60 #define D(...)
  61 #endif
  62
  63
  64 #define UH_LIMIT_MSGHEAD        4096
  65 #define UH_LIMIT_HEADERS        64
  66 #define UH_LIMIT_CLIENTS        64
  67
  68
  69 struct listener;
  70 struct client;
  71 struct interpreter;
  72 struct http_request;
  73 struct uh_ubus_state;
  74
  75 struct config {
  76         char docroot[PATH_MAX];
  77         char *realm;
  78         char *file;
  79         char *index_file;
  80         char *error_handler;
  81         int no_symlinks;
  82         int no_dirlists;
  83         int network_timeout;
  84         int rfc1918_filter;
  85         int tcp_keepalive;
  86         int max_requests;
  87 #ifdef HAVE_CGI
  88         char *cgi_prefix;
  89 #endif
  90 #ifdef HAVE_LUA
  91         char *lua_prefix;
  92         char *lua_handler;
  93         lua_State *lua_state;
  94         lua_State * (*lua_init) (const struct config *conf);
  95         void (*lua_close) (lua_State *L);
  96         bool (*lua_request) (struct client *cl, lua_State *L);
  97 #endif
  98 #ifdef HAVE_UBUS
  99         char *ubus_prefix;
 100         char *ubus_socket;
 101         void *ubus_state;
 102         struct uh_ubus_state * (*ubus_init) (const struct config *conf);
 103         void (*ubus_close) (struct uh_ubus_state *state);
 104         bool (*ubus_request) (struct client *cl, struct uh_ubus_state *state);
 105 #endif
 106 #if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
 107         int script_timeout;
 108 #endif
 109 #ifdef HAVE_TLS
 110         char *cert;
 111         char *key;
 112         SSL_CTX *tls;
 113         SSL_CTX * (*tls_init) (void);
 114         int (*tls_cert) (SSL_CTX *c, const char *file);
 115         int (*tls_key) (SSL_CTX *c, const char *file);
 116         void (*tls_free) (struct listener *l);
 117         int (*tls_accept) (struct client *c);
 118         void (*tls_close) (struct client *c);
 119         int (*tls_recv) (struct client *c, char *buf, int len);
 120         int (*tls_send) (struct client *c, const char *buf, int len);
 121 #endif
 122 };
 123
 124 enum http_method {
 125         UH_HTTP_MSG_GET,
 126         UH_HTTP_MSG_POST,
 127         UH_HTTP_MSG_HEAD,
 128 };
 129
 130 extern const char *http_methods[];
 131
 132 enum http_version {
 133         UH_HTTP_VER_0_9,
 134         UH_HTTP_VER_1_0,
 135         UH_HTTP_VER_1_1,
 136 };
 137
 138 extern const char *http_versions[];
 139
 140 struct http_request {
 141         enum http_method method;
 142         enum http_version version;
 143         int redirect_status;
 144         char *url;
 145         char *headers[UH_LIMIT_HEADERS];
 146         struct auth_realm *realm;
 147 };
 148
 149 struct http_response {
 150         int statuscode;
 151         char *statusmsg;
 152         char *headers[UH_LIMIT_HEADERS];
 153 };
 154
 155 struct listener {
 156         struct uloop_fd fd;
 157         int socket;
 158         int n_clients;
 159         struct sockaddr_in6 addr;
 160         struct config *conf;
 161 #ifdef HAVE_TLS
 162         SSL_CTX *tls;
 163 #endif
 164         struct listener *next;
 165 };
 166
 167 struct client {
 168 #ifdef HAVE_TLS
 169         SSL *tls;
 170 #endif
 171         struct uloop_fd fd;
 172         struct uloop_fd rpipe;
 173         struct uloop_fd wpipe;
 174         struct uloop_process proc;
 175         struct uloop_timeout timeout;
 176         bool (*cb)(struct client *);
 177         void *priv;
 178         bool dispatched;
 179         struct {
 180                 char buf[UH_LIMIT_MSGHEAD];
 181                 char *ptr;
 182                 int len;
 183         } httpbuf;
 184         struct listener *server;
 185         struct http_request request;
 186         struct http_response response;
 187         struct sockaddr_in6 servaddr;
 188         struct sockaddr_in6 peeraddr;
 189         struct client *next;
 190 };
 191
 192 struct client_light {
 193 #ifdef HAVE_TLS
 194         SSL *tls;
 195 #endif
 196         struct uloop_fd fd;
 197 };
 198
 199 struct auth_realm {
 200         char path[PATH_MAX];
 201         char user[32];
 202         char pass[128];
 203         struct auth_realm *next;
 204 };
 205
 206 #ifdef HAVE_CGI
 207 struct interpreter {
 208         char path[PATH_MAX];
 209         char extn[32];
 210         struct interpreter *next;
 211 };
 212 #endif
 213
 214 #endif