uhttpd.h

   1 /*
   2  * uhttpd - Tiny single-threaded httpd - Main header
   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 #ifndef __UHTTPD_H
  21 #define __UHTTPD_H
  22
  23 #include <netinet/in.h>
  24 #include <limits.h>
  25 #include <dirent.h>
  26
  27 #include <libubox/list.h>
  28 #include <libubox/uloop.h>
  29 #include <libubox/ustream.h>
  30 #include <libubox/blob.h>
  31 #include <libubox/utils.h>
  32
  33 #include "utils.h"
  34
  35 #define UH_LIMIT_CLIENTS        64
  36 #define UH_LIMIT_HEADERS        64
  37 #define UH_LIMIT_MSGHEAD        4096
  38
  39 struct config {
  40         char docroot[PATH_MAX];
  41         char *realm;
  42         char *file;
  43         char *error_handler;
  44         char *cgi_prefix;
  45         int no_symlinks;
  46         int no_dirlists;
  47         int network_timeout;
  48         int rfc1918_filter;
  49         int tcp_keepalive;
  50         int max_requests;
  51         int http_keepalive;
  52         int script_timeout;
  53 };
  54
  55 struct auth_realm {
  56         struct list_head list;
  57         char *path;
  58         char *user;
  59         char *pass;
  60 };
  61
  62 enum http_method {
  63         UH_HTTP_MSG_GET,
  64         UH_HTTP_MSG_POST,
  65         UH_HTTP_MSG_HEAD,
  66 };
  67
  68 enum http_version {
  69         UH_HTTP_VER_0_9,
  70         UH_HTTP_VER_1_0,
  71         UH_HTTP_VER_1_1,
  72 };
  73
  74 struct http_request {
  75         enum http_method method;
  76         enum http_version version;
  77         int redirect_status;
  78         char *url;
  79         struct auth_realm *realm;
  80 };
  81
  82 struct http_response {
  83         int statuscode;
  84         char *statusmsg;
  85         char *headers[UH_LIMIT_HEADERS];
  86 };
  87
  88 enum client_state {
  89         CLIENT_STATE_INIT,
  90         CLIENT_STATE_HEADER,
  91         CLIENT_STATE_DATA,
  92         CLIENT_STATE_DONE,
  93         CLIENT_STATE_CLOSE,
  94 };
  95
  96 struct client {
  97         struct list_head list;
  98         int id;
  99
 100         struct ustream *us;
 101         struct ustream_fd sfd;
 102 #ifdef HAVE_TLS
 103         struct ustream_ssl stream_ssl;
 104 #endif
 105         struct uloop_fd rpipe;
 106         struct uloop_fd wpipe;
 107         struct uloop_process proc;
 108         struct uloop_timeout timeout;
 109         bool (*cb)(struct client *);
 110         void *priv;
 111
 112         enum client_state state;
 113
 114         struct http_request request;
 115         struct http_response response;
 116         struct sockaddr_in6 servaddr;
 117         struct sockaddr_in6 peeraddr;
 118
 119         struct blob_buf hdr;
 120
 121         void (*dispatch_write_cb)(struct client *cl);
 122         void (*dispatch_free)(struct client *cl);
 123
 124         union {
 125                 struct {
 126                         struct blob_attr **hdr;
 127                         int fd;
 128                 } file;
 129         } data;
 130 };
 131
 132 extern int n_clients;
 133 extern struct config conf;
 134
 135 void uh_index_add(const char *filename);
 136
 137 void uh_accept_client(int fd);
 138
 139 void uh_unblock_listeners(void);
 140 void uh_setup_listeners(void);
 141 int uh_socket_bind(const char *host, const char *port, bool tls);
 142
 143 bool uh_use_chunked(struct client *cl);
 144 void uh_chunk_write(struct client *cl, const void *data, int len);
 145 void uh_chunk_vprintf(struct client *cl, const char *format, va_list arg);
 146
 147 void __printf(2, 3)
 148 uh_chunk_printf(struct client *cl, const char *format, ...);
 149
 150 void uh_chunk_eof(struct client *cl);
 151 void uh_request_done(struct client *cl);
 152
 153 void uh_http_header(struct client *cl, int code, const char *summary);
 154 void __printf(4, 5)
 155 uh_client_error(struct client *cl, int code, const char *summary, const char *fmt, ...);
 156
 157 void uh_handle_file_request(struct client *cl);
 158
 159 void uh_auth_add(const char *path, const char *user, const char *pass);
 160
 161 #endif