1 #ifndef HEADER_CURL_HTTP_H 2 #define HEADER_CURL_HTTP_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al. 11 * 12 * This software is licensed as described in the file COPYING, which 13 * you should have received as part of this distribution. The terms 14 * are also available at https://curl.haxx.se/docs/copyright.html. 15 * 16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 17 * copies of the Software, and permit persons to whom the Software is 18 * furnished to do so, under the terms of the COPYING file. 19 * 20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 21 * KIND, either express or implied. 22 * 23 ***************************************************************************/ 24 #include "curl_setup.h" 25 26 #ifndef CURL_DISABLE_HTTP 27 28 #ifdef USE_NGHTTP2 29 #include <nghttp2/nghttp2.h> 30 #endif 31 32 extern const struct Curl_handler Curl_handler_http; 33 34 #ifdef USE_SSL 35 extern const struct Curl_handler Curl_handler_https; 36 #endif 37 38 /* Header specific functions */ 39 bool Curl_compareheader(const char *headerline, /* line to check */ 40 const char *header, /* header keyword _with_ colon */ 41 const char *content); /* content string to find */ 42 43 char *Curl_copy_header_value(const char *header); 44 45 char *Curl_checkProxyheaders(const struct connectdata *conn, 46 const char *thisheader); 47 /* ------------------------------------------------------------------------- */ 48 /* 49 * The add_buffer series of functions are used to build one large memory chunk 50 * from repeated function invokes. Used so that the entire HTTP request can 51 * be sent in one go. 52 */ 53 struct Curl_send_buffer { 54 char *buffer; 55 size_t size_max; 56 size_t size_used; 57 }; 58 typedef struct Curl_send_buffer Curl_send_buffer; 59 60 Curl_send_buffer *Curl_add_buffer_init(void); 61 void Curl_add_buffer_free(Curl_send_buffer **inp); 62 CURLcode Curl_add_bufferf(Curl_send_buffer **inp, const char *fmt, ...) 63 WARN_UNUSED_RESULT; 64 CURLcode Curl_add_buffer(Curl_send_buffer **inp, const void *inptr, 65 size_t size) WARN_UNUSED_RESULT; 66 CURLcode Curl_add_buffer_send(Curl_send_buffer **inp, 67 struct connectdata *conn, 68 curl_off_t *bytes_written, 69 size_t included_body_bytes, 70 int socketindex); 71 72 CURLcode Curl_add_timecondition(const struct connectdata *conn, 73 Curl_send_buffer *buf); 74 CURLcode Curl_add_custom_headers(struct connectdata *conn, 75 bool is_connect, 76 Curl_send_buffer *req_buffer); 77 CURLcode Curl_http_compile_trailers(struct curl_slist *trailers, 78 Curl_send_buffer **buffer, 79 struct Curl_easy *handle); 80 81 /* protocol-specific functions set up to be called by the main engine */ 82 CURLcode Curl_http(struct connectdata *conn, bool *done); 83 CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature); 84 CURLcode Curl_http_connect(struct connectdata *conn, bool *done); 85 86 /* These functions are in http.c */ 87 CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy, 88 const char *auth); 89 CURLcode Curl_http_auth_act(struct connectdata *conn); 90 91 /* If only the PICKNONE bit is set, there has been a round-trip and we 92 selected to use no auth at all. Ie, we actively select no auth, as opposed 93 to not having one selected. The other CURLAUTH_* defines are present in the 94 public curl/curl.h header. */ 95 #define CURLAUTH_PICKNONE (1<<30) /* don't use auth */ 96 97 /* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST 98 data get included in the initial data chunk sent to the server. If the 99 data is larger than this, it will automatically get split up in multiple 100 system calls. 101 102 This value used to be fairly big (100K), but we must take into account that 103 if the server rejects the POST due for authentication reasons, this data 104 will always be unconditionally sent and thus it may not be larger than can 105 always be afforded to send twice. 106 107 It must not be greater than 64K to work on VMS. 108 */ 109 #ifndef MAX_INITIAL_POST_SIZE 110 #define MAX_INITIAL_POST_SIZE (64*1024) 111 #endif 112 113 /* EXPECT_100_THRESHOLD is the request body size limit for when libcurl will 114 * automatically add an "Expect: 100-continue" header in HTTP requests. When 115 * the size is unknown, it will always add it. 116 * 117 */ 118 #ifndef EXPECT_100_THRESHOLD 119 #define EXPECT_100_THRESHOLD 1024 120 #endif 121 122 #endif /* CURL_DISABLE_HTTP */ 123 124 #ifdef USE_NGHTTP3 125 struct h3out; /* see ngtcp2 */ 126 #endif 127 128 /**************************************************************************** 129 * HTTP unique setup 130 ***************************************************************************/ 131 struct HTTP { 132 curl_mimepart *sendit; 133 curl_off_t postsize; /* off_t to handle large file sizes */ 134 const char *postdata; 135 136 const char *p_pragma; /* Pragma: string */ 137 const char *p_accept; /* Accept: string */ 138 139 /* For FORM posting */ 140 curl_mimepart form; 141 142 struct back { 143 curl_read_callback fread_func; /* backup storage for fread pointer */ 144 void *fread_in; /* backup storage for fread_in pointer */ 145 const char *postdata; 146 curl_off_t postsize; 147 } backup; 148 149 enum { 150 HTTPSEND_NADA, /* init */ 151 HTTPSEND_REQUEST, /* sending a request */ 152 HTTPSEND_BODY, /* sending body */ 153 HTTPSEND_LAST /* never use this */ 154 } sending; 155 156 #ifndef CURL_DISABLE_HTTP 157 Curl_send_buffer *send_buffer; /* used if the request couldn't be sent in 158 one chunk, points to an allocated 159 send_buffer struct */ 160 #endif 161 #ifdef USE_NGHTTP2 162 /*********** for HTTP/2 we store stream-local data here *************/ 163 int32_t stream_id; /* stream we are interested in */ 164 165 bool bodystarted; 166 /* We store non-final and final response headers here, per-stream */ 167 Curl_send_buffer *header_recvbuf; 168 size_t nread_header_recvbuf; /* number of bytes in header_recvbuf fed into 169 upper layer */ 170 Curl_send_buffer *trailer_recvbuf; 171 int status_code; /* HTTP status code */ 172 const uint8_t *pausedata; /* pointer to data received in on_data_chunk */ 173 size_t pauselen; /* the number of bytes left in data */ 174 bool close_handled; /* TRUE if stream closure is handled by libcurl */ 175 176 char **push_headers; /* allocated array */ 177 size_t push_headers_used; /* number of entries filled in */ 178 size_t push_headers_alloc; /* number of entries allocated */ 179 #endif 180 #if defined(USE_NGHTTP2) || defined(USE_NGHTTP3) 181 bool closed; /* TRUE on HTTP2 stream close */ 182 char *mem; /* points to a buffer in memory to store received data */ 183 size_t len; /* size of the buffer 'mem' points to */ 184 size_t memlen; /* size of data copied to mem */ 185 #endif 186 #if defined(USE_NGHTTP2) || defined(ENABLE_QUIC) 187 /* fields used by both HTTP/2 and HTTP/3 */ 188 const uint8_t *upload_mem; /* points to a buffer to read from */ 189 size_t upload_len; /* size of the buffer 'upload_mem' points to */ 190 curl_off_t upload_left; /* number of bytes left to upload */ 191 #endif 192 193 #ifdef ENABLE_QUIC 194 /*********** for HTTP/3 we store stream-local data here *************/ 195 int64_t stream3_id; /* stream we are interested in */ 196 bool firstbody; /* FALSE until body arrives */ 197 bool h3req; /* FALSE until request is issued */ 198 bool upload_done; 199 #endif 200 #ifdef USE_NGHTTP3 201 struct h3out *h3out; /* per-stream buffers for upload */ 202 #endif 203 }; 204 205 #ifdef USE_NGHTTP2 206 /* h2 settings for this connection */ 207 struct h2settings { 208 uint32_t max_concurrent_streams; 209 bool enable_push; 210 }; 211 #endif 212 213 struct http_conn { 214 #ifdef USE_NGHTTP2 215 #define H2_BINSETTINGS_LEN 80 216 nghttp2_session *h2; 217 uint8_t binsettings[H2_BINSETTINGS_LEN]; 218 size_t binlen; /* length of the binsettings data */ 219 Curl_send *send_underlying; /* underlying send Curl_send callback */ 220 Curl_recv *recv_underlying; /* underlying recv Curl_recv callback */ 221 char *inbuf; /* buffer to receive data from underlying socket */ 222 size_t inbuflen; /* number of bytes filled in inbuf */ 223 size_t nread_inbuf; /* number of bytes read from in inbuf */ 224 /* We need separate buffer for transmission and reception because we 225 may call nghttp2_session_send() after the 226 nghttp2_session_mem_recv() but mem buffer is still not full. In 227 this case, we wrongly sends the content of mem buffer if we share 228 them for both cases. */ 229 int32_t pause_stream_id; /* stream ID which paused 230 nghttp2_session_mem_recv */ 231 size_t drain_total; /* sum of all stream's UrlState.drain */ 232 233 /* this is a hash of all individual streams (Curl_easy structs) */ 234 struct h2settings settings; 235 236 /* list of settings that will be sent */ 237 nghttp2_settings_entry local_settings[3]; 238 size_t local_settings_num; 239 uint32_t error_code; /* HTTP/2 error code */ 240 #else 241 int unused; /* prevent a compiler warning */ 242 #endif 243 }; 244 245 CURLcode Curl_http_readwrite_headers(struct Curl_easy *data, 246 struct connectdata *conn, 247 ssize_t *nread, 248 bool *stop_reading); 249 250 /** 251 * Curl_http_output_auth() setups the authentication headers for the 252 * host/proxy and the correct authentication 253 * method. conn->data->state.authdone is set to TRUE when authentication is 254 * done. 255 * 256 * @param conn all information about the current connection 257 * @param request pointer to the request keyword 258 * @param path pointer to the requested path 259 * @param proxytunnel boolean if this is the request setting up a "proxy 260 * tunnel" 261 * 262 * @returns CURLcode 263 */ 264 CURLcode 265 Curl_http_output_auth(struct connectdata *conn, 266 const char *request, 267 const char *path, 268 bool proxytunnel); /* TRUE if this is the request setting 269 up the proxy tunnel */ 270 271 #endif /* HEADER_CURL_HTTP_H */ 272