1 #ifndef HEADER_CURL_MULTIHANDLE_H
2 #define HEADER_CURL_MULTIHANDLE_H
3 /***************************************************************************
5 * Project ___| | | | _ \| |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
10 * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
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.
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.
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
23 ***************************************************************************/
26 /* the 'CURLMsg' is the part that is visible to the external user */
27 struct CURLMsg extmsg;
30 /* NOTE: if you add a state here, add the name to the statename[] array as
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
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 */
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)
62 /* This is the struct known as CURLM on the outside */
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. */
68 /* We have a doubly-linked circular list with easy handles */
69 struct SessionHandle *easyp;
70 struct SessionHandle *easylp; /* last node */
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 */
76 struct curl_llist *msglist; /* a list of messages from completed transfers */
78 struct curl_llist *pending; /* SessionHandles that are in the
79 CURLM_STATE_CONNECT_PEND state */
81 /* callback function and user data pointer for the *socket() API */
82 curl_socket_callback socket_cb;
86 struct curl_hash *hostcache;
88 /* timetree points to the splay-tree of time nodes to figure out expire
89 times of all currently set timers */
90 struct Curl_tree *timetree;
92 /* 'sockhash' is the lookup hash for socket descriptor => easy handles (note
93 the pluralis form, there can be more than one easy handle waiting on the
94 same actual socket) */
95 struct curl_hash *sockhash;
97 /* Whether pipelining is enabled for this multi handle */
98 bool pipelining_enabled;
100 /* Shared connection cache (bundles)*/
101 struct conncache *conn_cache;
103 /* This handle will be used for closing the cached connections in
104 curl_multi_cleanup() */
105 struct SessionHandle *closure_handle;
107 long maxconnects; /* if >0, a fixed limit of the maximum number of entries
108 we're allowed to grow the connection cache to */
110 long max_host_connections; /* if >0, a fixed limit of the maximum number
111 of connections per host */
113 long max_total_connections; /* if >0, a fixed limit of the maximum number
114 of connections in total */
116 long max_pipeline_length; /* if >0, maximum number of requests in a
119 long content_length_penalty_size; /* a connection with a
120 content-length bigger than
121 this is not considered
124 long chunk_length_penalty_size; /* a connection with a chunk length
125 bigger than this is not
126 considered for pipelining */
128 struct curl_llist *pipelining_site_bl; /* List of sites that are blacklisted
131 struct curl_llist *pipelining_server_bl; /* List of server types that are
132 blacklisted from pipelining */
134 /* timer callback and user data pointer for the *socket() API */
135 curl_multi_timer_callback timer_cb;
137 struct timeval timer_lastcall; /* the fixed time for the timeout for the
141 #endif /* HEADER_CURL_MULTIHANDLE_H */