1 #ifndef HEADER_CURL_MULTIHANDLE_H 2 #define HEADER_CURL_MULTIHANDLE_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel (at) 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 http://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 25 #include "conncache.h" 26 27 struct Curl_message { 28 /* the 'CURLMsg' is the part that is visible to the external user */ 29 struct CURLMsg extmsg; 30 }; 31 32 /* NOTE: if you add a state here, add the name to the statename[] array as 33 well! 34 */ 35 typedef enum { 36 CURLM_STATE_INIT, /* 0 - start in this state */ 37 CURLM_STATE_CONNECT_PEND, /* 1 - no connections, waiting for one */ 38 CURLM_STATE_CONNECT, /* 2 - resolve/connect has been sent off */ 39 CURLM_STATE_WAITRESOLVE, /* 3 - awaiting the resolve to finalize */ 40 CURLM_STATE_WAITCONNECT, /* 4 - awaiting the TCP connect to finalize */ 41 CURLM_STATE_WAITPROXYCONNECT, /* 5 - awaiting proxy CONNECT to finalize */ 42 CURLM_STATE_SENDPROTOCONNECT, /* 6 - initiate protocol connect procedure */ 43 CURLM_STATE_PROTOCONNECT, /* 7 - completing the protocol-specific connect 44 phase */ 45 CURLM_STATE_WAITDO, /* 8 - wait for our turn to send the request */ 46 CURLM_STATE_DO, /* 9 - start send off the request (part 1) */ 47 CURLM_STATE_DOING, /* 10 - sending off the request (part 1) */ 48 CURLM_STATE_DO_MORE, /* 11 - send off the request (part 2) */ 49 CURLM_STATE_DO_DONE, /* 12 - done sending off request */ 50 CURLM_STATE_WAITPERFORM, /* 13 - wait for our turn to read the response */ 51 CURLM_STATE_PERFORM, /* 14 - transfer data */ 52 CURLM_STATE_TOOFAST, /* 15 - wait because limit-rate exceeded */ 53 CURLM_STATE_DONE, /* 16 - post data transfer operation */ 54 CURLM_STATE_COMPLETED, /* 17 - operation complete */ 55 CURLM_STATE_MSGSENT, /* 18 - the operation complete message is sent */ 56 CURLM_STATE_LAST /* 19 - not a true state, never use this */ 57 } CURLMstate; 58 59 /* we support N sockets per easy handle. Set the corresponding bit to what 60 action we should wait for */ 61 #define MAX_SOCKSPEREASYHANDLE 5 62 #define GETSOCK_READABLE (0x00ff) 63 #define GETSOCK_WRITABLE (0xff00) 64 65 #define CURLPIPE_ANY (CURLPIPE_HTTP1 | CURLPIPE_MULTIPLEX) 66 67 /* This is the struct known as CURLM on the outside */ 68 struct Curl_multi { 69 /* First a simple identifier to easier detect if a user mix up 70 this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */ 71 long type; 72 73 /* We have a doubly-linked circular list with easy handles */ 74 struct SessionHandle *easyp; 75 struct SessionHandle *easylp; /* last node */ 76 77 int num_easy; /* amount of entries in the linked list above. */ 78 int num_alive; /* amount of easy handles that are added but have not yet 79 reached COMPLETE state */ 80 81 struct curl_llist *msglist; /* a list of messages from completed transfers */ 82 83 struct curl_llist *pending; /* SessionHandles that are in the 84 CURLM_STATE_CONNECT_PEND state */ 85 86 /* callback function and user data pointer for the *socket() API */ 87 curl_socket_callback socket_cb; 88 void *socket_userp; 89 90 /* Hostname cache */ 91 struct curl_hash hostcache; 92 93 /* timetree points to the splay-tree of time nodes to figure out expire 94 times of all currently set timers */ 95 struct Curl_tree *timetree; 96 97 /* 'sockhash' is the lookup hash for socket descriptor => easy handles (note 98 the pluralis form, there can be more than one easy handle waiting on the 99 same actual socket) */ 100 struct curl_hash sockhash; 101 102 /* pipelining wanted bits (CURLPIPE*) */ 103 long pipelining; 104 105 bool recheckstate; /* see Curl_multi_connchanged */ 106 107 /* Shared connection cache (bundles)*/ 108 struct conncache conn_cache; 109 110 /* This handle will be used for closing the cached connections in 111 curl_multi_cleanup() */ 112 struct SessionHandle *closure_handle; 113 114 long maxconnects; /* if >0, a fixed limit of the maximum number of entries 115 we're allowed to grow the connection cache to */ 116 117 long max_host_connections; /* if >0, a fixed limit of the maximum number 118 of connections per host */ 119 120 long max_total_connections; /* if >0, a fixed limit of the maximum number 121 of connections in total */ 122 123 long max_pipeline_length; /* if >0, maximum number of requests in a 124 pipeline */ 125 126 long content_length_penalty_size; /* a connection with a 127 content-length bigger than 128 this is not considered 129 for pipelining */ 130 131 long chunk_length_penalty_size; /* a connection with a chunk length 132 bigger than this is not 133 considered for pipelining */ 134 135 struct curl_llist *pipelining_site_bl; /* List of sites that are blacklisted 136 from pipelining */ 137 138 struct curl_llist *pipelining_server_bl; /* List of server types that are 139 blacklisted from pipelining */ 140 141 /* timer callback and user data pointer for the *socket() API */ 142 curl_multi_timer_callback timer_cb; 143 void *timer_userp; 144 struct timeval timer_lastcall; /* the fixed time for the timeout for the 145 previous callback */ 146 }; 147 148 #endif /* HEADER_CURL_MULTIHANDLE_H */ 149
