1#ifndef HEADER_CURL_MULTIHANDLE_H 2#define HEADER_CURL_MULTIHANDLE_H 3/*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2013, 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 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 25struct Curl_message { 26 /* the 'CURLMsg' is the part that is visible to the external user */ 27 struct CURLMsg extmsg; 28}; 29 30/* NOTE: if you add a state here, add the name to the statename[] array as 31 well! 32*/ 33typedef enum { 34 CURLM_STATE_INIT, /* 0 - start in this state */ 35 CURLM_STATE_CONNECT_PEND, /* 1 - no connections, waiting for one */ 36 CURLM_STATE_CONNECT, /* 2 - resolve/connect has been sent off */ 37 CURLM_STATE_WAITRESOLVE, /* 3 - awaiting the resolve to finalize */ 38 CURLM_STATE_WAITCONNECT, /* 4 - awaiting the connect to finalize */ 39 CURLM_STATE_WAITPROXYCONNECT, /* 5 - awaiting proxy CONNECT to finalize */ 40 CURLM_STATE_PROTOCONNECT, /* 6 - completing the protocol-specific connect 41 phase */ 42 CURLM_STATE_WAITDO, /* 7 - wait for our turn to send the request */ 43 CURLM_STATE_DO, /* 8 - start send off the request (part 1) */ 44 CURLM_STATE_DOING, /* 9 - sending off the request (part 1) */ 45 CURLM_STATE_DO_MORE, /* 10 - send off the request (part 2) */ 46 CURLM_STATE_DO_DONE, /* 11 - done sending off request */ 47 CURLM_STATE_WAITPERFORM, /* 12 - wait for our turn to read the response */ 48 CURLM_STATE_PERFORM, /* 13 - transfer data */ 49 CURLM_STATE_TOOFAST, /* 14 - wait because limit-rate exceeded */ 50 CURLM_STATE_DONE, /* 15 - post data transfer operation */ 51 CURLM_STATE_COMPLETED, /* 16 - operation complete */ 52 CURLM_STATE_MSGSENT, /* 17 - the operation complete message is sent */ 53 CURLM_STATE_LAST /* 18 - not a true state, never use this */ 54} CURLMstate; 55 56/* we support N sockets per easy handle. Set the corresponding bit to what 57 action we should wait for */ 58#define MAX_SOCKSPEREASYHANDLE 5 59#define GETSOCK_READABLE (0x00ff) 60#define GETSOCK_WRITABLE (0xff00) 61 62/* This is the struct known as CURLM on the outside */ 63struct Curl_multi { 64 /* First a simple identifier to easier detect if a user mix up 65 this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */ 66 long type; 67 68 /* We have a doubly-linked circular list with easy handles */ 69 struct SessionHandle *easyp; 70 struct SessionHandle *easylp; /* last node */ 71 72 int num_easy; /* amount of entries in the linked list above. */ 73 int num_alive; /* amount of easy handles that are added but have not yet 74 reached COMPLETE state */ 75 76 struct curl_llist *msglist; /* a list of messages from completed transfers */ 77 78 /* callback function and user data pointer for the *socket() API */ 79 curl_socket_callback socket_cb; 80 void *socket_userp; 81 82 /* Hostname cache */ 83 struct curl_hash *hostcache; 84 85 /* timetree points to the splay-tree of time nodes to figure out expire 86 times of all currently set timers */ 87 struct Curl_tree *timetree; 88 89 /* 'sockhash' is the lookup hash for socket descriptor => easy handles (note 90 the pluralis form, there can be more than one easy handle waiting on the 91 same actual socket) */ 92 struct curl_hash *sockhash; 93 94 /* Whether pipelining is enabled for this multi handle */ 95 bool pipelining_enabled; 96 97 /* Shared connection cache (bundles)*/ 98 struct conncache *conn_cache; 99 100 /* This handle will be used for closing the cached connections in 101 curl_multi_cleanup() */ 102 struct SessionHandle *closure_handle; 103 104 long maxconnects; /* if >0, a fixed limit of the maximum number of entries 105 we're allowed to grow the connection cache to */ 106 107 long max_host_connections; /* if >0, a fixed limit of the maximum number 108 of connections per host */ 109 110 long max_total_connections; /* if >0, a fixed limit of the maximum number 111 of connections in total */ 112 113 long max_pipeline_length; /* if >0, maximum number of requests in a 114 pipeline */ 115 116 long content_length_penalty_size; /* a connection with a 117 content-length bigger than 118 this is not considered 119 for pipelining */ 120 121 long chunk_length_penalty_size; /* a connection with a chunk length 122 bigger than this is not 123 considered for pipelining */ 124 125 struct curl_llist *pipelining_site_bl; /* List of sites that are blacklisted 126 from pipelining */ 127 128 struct curl_llist *pipelining_server_bl; /* List of server types that are 129 blacklisted from pipelining */ 130 131 /* timer callback and user data pointer for the *socket() API */ 132 curl_multi_timer_callback timer_cb; 133 void *timer_userp; 134 struct timeval timer_lastcall; /* the fixed time for the timeout for the 135 previous callback */ 136}; 137 138#endif /* HEADER_CURL_MULTIHANDLE_H */ 139 140