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