1 #ifndef HEADER_CURL_MULTIHANDLE_H
2 #define HEADER_CURL_MULTIHANDLE_H
3 /***************************************************************************
5 * Project ___| | | | _ \| |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
10 * Copyright (C) 1998 - 2017, 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 https://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 ***************************************************************************/
25 #include "conncache.h"
28 struct curl_llist_element list;
29 /* the 'CURLMsg' is the part that is visible to the external user */
30 struct CURLMsg extmsg;
33 /* NOTE: if you add a state here, add the name to the statename[] array as
37 CURLM_STATE_INIT, /* 0 - start in this state */
38 CURLM_STATE_CONNECT_PEND, /* 1 - no connections, waiting for one */
39 CURLM_STATE_CONNECT, /* 2 - resolve/connect has been sent off */
40 CURLM_STATE_WAITRESOLVE, /* 3 - awaiting the resolve to finalize */
41 CURLM_STATE_WAITCONNECT, /* 4 - awaiting the TCP connect to finalize */
42 CURLM_STATE_WAITPROXYCONNECT, /* 5 - awaiting HTTPS proxy SSL initialization
43 to complete and/or proxy CONNECT to
45 CURLM_STATE_SENDPROTOCONNECT, /* 6 - initiate protocol connect procedure */
46 CURLM_STATE_PROTOCONNECT, /* 7 - completing the protocol-specific connect
48 CURLM_STATE_WAITDO, /* 8 - wait for our turn to send the request */
49 CURLM_STATE_DO, /* 9 - start send off the request (part 1) */
50 CURLM_STATE_DOING, /* 10 - sending off the request (part 1) */
51 CURLM_STATE_DO_MORE, /* 11 - send off the request (part 2) */
52 CURLM_STATE_DO_DONE, /* 12 - done sending off request */
53 CURLM_STATE_WAITPERFORM, /* 13 - wait for our turn to read the response */
54 CURLM_STATE_PERFORM, /* 14 - transfer data */
55 CURLM_STATE_TOOFAST, /* 15 - wait because limit-rate exceeded */
56 CURLM_STATE_DONE, /* 16 - post data transfer operation */
57 CURLM_STATE_COMPLETED, /* 17 - operation complete */
58 CURLM_STATE_MSGSENT, /* 18 - the operation complete message is sent */
59 CURLM_STATE_LAST /* 19 - not a true state, never use this */
62 /* we support N sockets per easy handle. Set the corresponding bit to what
63 action we should wait for */
64 #define MAX_SOCKSPEREASYHANDLE 5
65 #define GETSOCK_READABLE (0x00ff)
66 #define GETSOCK_WRITABLE (0xff00)
68 #define CURLPIPE_ANY (CURLPIPE_HTTP1 | CURLPIPE_MULTIPLEX)
70 /* This is the struct known as CURLM on the outside */
72 /* First a simple identifier to easier detect if a user mix up
73 this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */
76 /* We have a doubly-linked circular list with easy handles */
77 struct Curl_easy *easyp;
78 struct Curl_easy *easylp; /* last node */
80 int num_easy; /* amount of entries in the linked list above. */
81 int num_alive; /* amount of easy handles that are added but have not yet
82 reached COMPLETE state */
84 struct curl_llist msglist; /* a list of messages from completed transfers */
86 struct curl_llist pending; /* Curl_easys that are in the
87 CURLM_STATE_CONNECT_PEND state */
89 /* callback function and user data pointer for the *socket() API */
90 curl_socket_callback socket_cb;
93 /* callback function and user data pointer for server push */
94 curl_push_callback push_cb;
98 struct curl_hash hostcache;
100 /* timetree points to the splay-tree of time nodes to figure out expire
101 times of all currently set timers */
102 struct Curl_tree *timetree;
104 /* 'sockhash' is the lookup hash for socket descriptor => easy handles (note
105 the pluralis form, there can be more than one easy handle waiting on the
106 same actual socket) */
107 struct curl_hash sockhash;
109 /* pipelining wanted bits (CURLPIPE*) */
112 bool recheckstate; /* see Curl_multi_connchanged */
114 /* Shared connection cache (bundles)*/
115 struct conncache conn_cache;
117 long maxconnects; /* if >0, a fixed limit of the maximum number of entries
118 we're allowed to grow the connection cache to */
120 long max_host_connections; /* if >0, a fixed limit of the maximum number
121 of connections per host */
123 long max_total_connections; /* if >0, a fixed limit of the maximum number
124 of connections in total */
126 long max_pipeline_length; /* if >0, maximum number of requests in a
129 long content_length_penalty_size; /* a connection with a
130 content-length bigger than
131 this is not considered
134 long chunk_length_penalty_size; /* a connection with a chunk length
135 bigger than this is not
136 considered for pipelining */
138 struct curl_llist pipelining_site_bl; /* List of sites that are blacklisted
141 struct curl_llist pipelining_server_bl; /* List of server types that are
142 blacklisted from pipelining */
144 /* timer callback and user data pointer for the *socket() API */
145 curl_multi_timer_callback timer_cb;
147 struct curltime timer_lastcall; /* the fixed time for the timeout for the
149 bool in_callback; /* true while executing a callback */
152 #endif /* HEADER_CURL_MULTIHANDLE_H */