package/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
  67 #define UH_LIMIT_CLIENTS        64
  68
  69 #define UH_HTTP_MSG_GET         0
  70 #define UH_HTTP_MSG_HEAD        1
  71 #define UH_HTTP_MSG_POST        2
  72
  73 #define UH_SOCK_CLIENT          0
  74 #define UH_SOCK_SERVER          1
  75
  76 struct listener;
  77 struct client;
  78 struct interpreter;
  79 struct http_request;
  80 struct uh_ubus_state;
  81
  82 struct config {
  83         char docroot[PATH_MAX];
  84         char *realm;
  85         char *file;
  86         char *index_file;
  87         char *error_handler;
  88         int no_symlinks;
  89         int no_dirlists;
  90         int network_timeout;
  91         int rfc1918_filter;
  92         int tcp_keepalive;
  93         int max_requests;
  94 #ifdef HAVE_CGI
  95         char *cgi_prefix;
  96 #endif
  97 #ifdef HAVE_LUA
  98         char *lua_prefix;
  99         char *lua_handler;
 100         lua_State *lua_state;
 101         lua_State * (*lua_init) (const struct config *conf);
 102         void (*lua_close) (lua_State *L);
 103         bool (*lua_request) (struct client *cl, lua_State *L);
 104 #endif
 105 #ifdef HAVE_UBUS
 106         char *ubus_prefix;
 107         char *ubus_socket;
 108         void *ubus_state;
 109         struct uh_ubus_state * (*ubus_init) (const struct config *conf);
 110         void (*ubus_close) (struct uh_ubus_state *state);
 111         bool (*ubus_request) (struct client *cl, struct uh_ubus_state *state);
 112 #endif
 113 #if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
 114         int script_timeout;
 115 #endif
 116 #ifdef HAVE_TLS
 117         char *cert;
 118         char *key;
 119         SSL_CTX *tls;
 120         SSL_CTX * (*tls_init) (void);
 121         int (*tls_cert) (SSL_CTX *c, const char *file);
 122         int (*tls_key) (SSL_CTX *c, const char *file);
 123         void (*tls_free) (struct listener *l);
 124         int (*tls_accept) (struct client *c);
 125         void (*tls_close) (struct client *c);
 126         int (*tls_recv) (struct client *c, char *buf, int len);
 127         int (*tls_send) (struct client *c, const char *buf, int len);
 128 #endif
 129 };
 130
 131 struct http_request {
 132         int     method;
 133         float version;
 134         int redirect_status;
 135         char *url;
 136         char *headers[UH_LIMIT_HEADERS];
 137         struct auth_realm *realm;
 138 };
 139
 140 struct http_response {
 141         int statuscode;
 142         char *statusmsg;
 143         char *headers[UH_LIMIT_HEADERS];
 144 };
 145
 146 struct listener {
 147         struct uloop_fd fd;
 148         int socket;
 149         int n_clients;
 150         struct sockaddr_in6 addr;
 151         struct config *conf;
 152 #ifdef HAVE_TLS
 153         SSL_CTX *tls;
 154 #endif
 155         struct listener *next;
 156 };
 157
 158 struct client {
 159 #ifdef HAVE_TLS
 160         SSL *tls;
 161 #endif
 162         struct uloop_fd fd;
 163         struct uloop_fd rpipe;
 164         struct uloop_fd wpipe;
 165         struct uloop_process proc;
 166         struct uloop_timeout timeout;
 167         bool (*cb)(struct client *);
 168         void *priv;
 169         bool dispatched;
 170         bool dead;
 171         struct {
 172                 char buf[UH_LIMIT_MSGHEAD];
 173                 char *ptr;
 174                 int len;
 175         } httpbuf;
 176         struct listener *server;
 177         struct http_request request;
 178         struct http_response response;
 179         struct sockaddr_in6 servaddr;
 180         struct sockaddr_in6 peeraddr;
 181         struct client *next;
 182 };
 183
 184 struct client_light {
 185 #ifdef HAVE_TLS
 186         SSL *tls;
 187 #endif
 188         struct uloop_fd fd;
 189 };
 190
 191 struct auth_realm {
 192         char path[PATH_MAX];
 193         char user[32];
 194         char pass[128];
 195         struct auth_realm *next;
 196 };
 197
 198 #ifdef HAVE_CGI
 199 struct interpreter {
 200         char path[PATH_MAX];
 201         char extn[32];
 202         struct interpreter *next;
 203 };
 204 #endif
 205
 206 #endif