1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#ifndef HEADER_CURL_MULTIHANDLE_H
#define HEADER_CURL_MULTIHANDLE_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "llist.h"
#include "hash.h"
#include "conncache.h"
#include "psl.h"
#include "socketpair.h"
struct connectdata;
struct Curl_message {
struct Curl_llist_element list;
/* the 'CURLMsg' is the part that is visible to the external user */
struct CURLMsg extmsg;
};
/* NOTE: if you add a state here, add the name to the statename[] array as
well!
*/
typedef enum {
MSTATE_INIT, /* 0 - start in this state */
MSTATE_PENDING, /* 1 - no connections, waiting for one */
MSTATE_CONNECT, /* 2 - resolve/connect has been sent off */
MSTATE_RESOLVING, /* 3 - awaiting the resolve to finalize */
MSTATE_CONNECTING, /* 4 - awaiting the TCP connect to finalize */
MSTATE_TUNNELING, /* 5 - awaiting HTTPS proxy SSL initialization to
complete and/or proxy CONNECT to finalize */
MSTATE_PROTOCONNECT, /* 6 - initiate protocol connect procedure */
MSTATE_PROTOCONNECTING, /* 7 - completing the protocol-specific connect
phase */
MSTATE_DO, /* 8 - start send off the request (part 1) */
MSTATE_DOING, /* 9 - sending off the request (part 1) */
MSTATE_DOING_MORE, /* 10 - send off the request (part 2) */
MSTATE_DID, /* 11 - done sending off request */
MSTATE_PERFORMING, /* 12 - transfer data */
MSTATE_RATELIMITING, /* 13 - wait because limit-rate exceeded */
MSTATE_DONE, /* 14 - post data transfer operation */
MSTATE_COMPLETED, /* 15 - operation complete */
MSTATE_MSGSENT, /* 16 - the operation complete message is sent */
MSTATE_LAST /* 17 - not a true state, never use this */
} CURLMstate;
/* we support N sockets per easy handle. Set the corresponding bit to what
action we should wait for */
#define MAX_SOCKSPEREASYHANDLE 5
#define GETSOCK_READABLE (0x00ff)
#define GETSOCK_WRITABLE (0xff00)
#define CURLPIPE_ANY (CURLPIPE_MULTIPLEX)
#if !defined(CURL_DISABLE_SOCKETPAIR)
#define ENABLE_WAKEUP
#endif
/* value for MAXIMUM CONCURRENT STREAMS upper limit */
#define INITIAL_MAX_CONCURRENT_STREAMS ((1U << 31) - 1)
/* This is the struct known as CURLM on the outside */
struct Curl_multi {
/* First a simple identifier to easier detect if a user mix up
this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */
unsigned int magic;
/* We have a doubly-linked list with easy handles */
struct Curl_easy *easyp;
struct Curl_easy *easylp; /* last node */
int num_easy; /* amount of entries in the linked list above. */
int num_alive; /* amount of easy handles that are added but have not yet
reached COMPLETE state */
struct Curl_llist msglist; /* a list of messages from completed transfers */
struct Curl_llist pending; /* Curl_easys that are in the
MSTATE_PENDING state */
/* callback function and user data pointer for the *socket() API */
curl_socket_callback socket_cb;
void *socket_userp;
/* callback function and user data pointer for server push */
curl_push_callback push_cb;
void *push_userp;
/* Hostname cache */
struct Curl_hash hostcache;
#ifdef USE_LIBPSL
/* PSL cache. */
struct PslCache psl;
#endif
/* timetree points to the splay-tree of time nodes to figure out expire
times of all currently set timers */
struct Curl_tree *timetree;
/* 'sockhash' is the lookup hash for socket descriptor => easy handles (note
the pluralis form, there can be more than one easy handle waiting on the
same actual socket) */
struct Curl_hash sockhash;
/* Shared connection cache (bundles)*/
struct conncache conn_cache;
long maxconnects; /* if >0, a fixed limit of the maximum number of entries
we're allowed to grow the connection cache to */
long max_host_connections; /* if >0, a fixed limit of the maximum number
of connections per host */
long max_total_connections; /* if >0, a fixed limit of the maximum number
of connections in total */
/* timer callback and user data pointer for the *socket() API */
curl_multi_timer_callback timer_cb;
void *timer_userp;
struct curltime timer_lastcall; /* the fixed time for the timeout for the
previous callback */
unsigned int max_concurrent_streams;
#ifdef USE_WINSOCK
WSAEVENT wsa_event; /* winsock event used for waits */
#else
#ifdef ENABLE_WAKEUP
curl_socket_t wakeup_pair[2]; /* socketpair() used for wakeup
0 is used for read, 1 is used for write */
#endif
#endif
/* multiplexing wanted */
bool multiplexing;
bool recheckstate; /* see Curl_multi_connchanged */
bool in_callback; /* true while executing a callback */
bool ipv6_works;
#ifdef USE_OPENSSL
bool ssl_seeded;
#endif
};
#endif /* HEADER_CURL_MULTIHANDLE_H */
|
