Annotation of embedaddon/curl/lib/multihandle.h, revision 1.1.1.1
1.1 misho 1: #ifndef HEADER_CURL_MULTIHANDLE_H
2: #define HEADER_CURL_MULTIHANDLE_H
3: /***************************************************************************
4: * _ _ ____ _
5: * Project ___| | | | _ \| |
6: * / __| | | | |_) | |
7: * | (__| |_| | _ <| |___
8: * \___|\___/|_| \_\_____|
9: *
10: * Copyright (C) 1998 - 2020, 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:
25: #include "conncache.h"
26: #include "psl.h"
27: #include "socketpair.h"
28:
29: struct Curl_message {
30: struct curl_llist_element list;
31: /* the 'CURLMsg' is the part that is visible to the external user */
32: struct CURLMsg extmsg;
33: };
34:
35: /* NOTE: if you add a state here, add the name to the statename[] array as
36: well!
37: */
38: typedef enum {
39: CURLM_STATE_INIT, /* 0 - start in this state */
40: CURLM_STATE_CONNECT_PEND, /* 1 - no connections, waiting for one */
41: CURLM_STATE_CONNECT, /* 2 - resolve/connect has been sent off */
42: CURLM_STATE_WAITRESOLVE, /* 3 - awaiting the resolve to finalize */
43: CURLM_STATE_WAITCONNECT, /* 4 - awaiting the TCP connect to finalize */
44: CURLM_STATE_WAITPROXYCONNECT, /* 5 - awaiting HTTPS proxy SSL initialization
45: to complete and/or proxy CONNECT to
46: finalize */
47: CURLM_STATE_SENDPROTOCONNECT, /* 6 - initiate protocol connect procedure */
48: CURLM_STATE_PROTOCONNECT, /* 7 - completing the protocol-specific connect
49: phase */
50: CURLM_STATE_DO, /* 8 - start send off the request (part 1) */
51: CURLM_STATE_DOING, /* 9 - sending off the request (part 1) */
52: CURLM_STATE_DO_MORE, /* 10 - send off the request (part 2) */
53: CURLM_STATE_DO_DONE, /* 11 - done sending off request */
54: CURLM_STATE_PERFORM, /* 12 - transfer data */
55: CURLM_STATE_TOOFAST, /* 13 - wait because limit-rate exceeded */
56: CURLM_STATE_DONE, /* 14 - post data transfer operation */
57: CURLM_STATE_COMPLETED, /* 15 - operation complete */
58: CURLM_STATE_MSGSENT, /* 16 - the operation complete message is sent */
59: CURLM_STATE_LAST /* 17 - not a true state, never use this */
60: } CURLMstate;
61:
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)
67:
68: #define CURLPIPE_ANY (CURLPIPE_MULTIPLEX)
69:
70: #if defined(USE_SOCKETPAIR) && !defined(USE_BLOCKING_SOCKETS)
71: #define ENABLE_WAKEUP
72: #endif
73:
74:
75: /* value for MAXIMUM CONCURRENT STREAMS upper limit */
76: #define INITIAL_MAX_CONCURRENT_STREAMS ((1U << 31) - 1)
77:
78: /* This is the struct known as CURLM on the outside */
79: struct Curl_multi {
80: /* First a simple identifier to easier detect if a user mix up
81: this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */
82: long type;
83:
84: /* We have a doubly-linked circular list with easy handles */
85: struct Curl_easy *easyp;
86: struct Curl_easy *easylp; /* last node */
87:
88: int num_easy; /* amount of entries in the linked list above. */
89: int num_alive; /* amount of easy handles that are added but have not yet
90: reached COMPLETE state */
91:
92: struct curl_llist msglist; /* a list of messages from completed transfers */
93:
94: struct curl_llist pending; /* Curl_easys that are in the
95: CURLM_STATE_CONNECT_PEND state */
96:
97: /* callback function and user data pointer for the *socket() API */
98: curl_socket_callback socket_cb;
99: void *socket_userp;
100:
101: /* callback function and user data pointer for server push */
102: curl_push_callback push_cb;
103: void *push_userp;
104:
105: /* Hostname cache */
106: struct curl_hash hostcache;
107:
108: #ifdef USE_LIBPSL
109: /* PSL cache. */
110: struct PslCache psl;
111: #endif
112:
113: /* timetree points to the splay-tree of time nodes to figure out expire
114: times of all currently set timers */
115: struct Curl_tree *timetree;
116:
117: /* 'sockhash' is the lookup hash for socket descriptor => easy handles (note
118: the pluralis form, there can be more than one easy handle waiting on the
119: same actual socket) */
120: struct curl_hash sockhash;
121:
122: /* Shared connection cache (bundles)*/
123: struct conncache conn_cache;
124:
125: long maxconnects; /* if >0, a fixed limit of the maximum number of entries
126: we're allowed to grow the connection cache to */
127:
128: long max_host_connections; /* if >0, a fixed limit of the maximum number
129: of connections per host */
130:
131: long max_total_connections; /* if >0, a fixed limit of the maximum number
132: of connections in total */
133:
134: /* timer callback and user data pointer for the *socket() API */
135: curl_multi_timer_callback timer_cb;
136: void *timer_userp;
137: struct curltime timer_lastcall; /* the fixed time for the timeout for the
138: previous callback */
139: unsigned int max_concurrent_streams;
140:
141: #ifdef ENABLE_WAKEUP
142: curl_socket_t wakeup_pair[2]; /* socketpair() used for wakeup
143: 0 is used for read, 1 is used for write */
144: #endif
145: /* multiplexing wanted */
146: bool multiplexing;
147: bool recheckstate; /* see Curl_multi_connchanged */
148: bool in_callback; /* true while executing a callback */
149: bool ipv6_works;
150: };
151:
152: #endif /* HEADER_CURL_MULTIHANDLE_H */
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