181 lines
6.5 KiB
C
181 lines
6.5 KiB
C
#ifndef HEADER_CURL_MULTIHANDLE_H
|
|
#define HEADER_CURL_MULTIHANDLE_H
|
|
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 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.
|
|
*
|
|
* SPDX-License-Identifier: curl
|
|
*
|
|
***************************************************************************/
|
|
|
|
#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)
|
|
|
|
/* Curl_multi SSL backend-specific data; declared differently by each SSL
|
|
backend */
|
|
struct multi_ssl_backend_data;
|
|
|
|
/* 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 */
|
|
struct Curl_llist msgsent; /* Curl_easys that are in the
|
|
MSTATE_MSGSENT 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;
|
|
|
|
#if defined(USE_SSL)
|
|
struct multi_ssl_backend_data *ssl_backend_data;
|
|
#endif
|
|
|
|
/* '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
|
|
#define IPV6_UNKNOWN 0
|
|
#define IPV6_DEAD 1
|
|
#define IPV6_WORKS 2
|
|
unsigned char ipv6_up; /* IPV6_* defined */
|
|
BIT(multiplexing); /* multiplexing wanted */
|
|
BIT(recheckstate); /* see Curl_multi_connchanged */
|
|
BIT(in_callback); /* true while executing a callback */
|
|
#ifdef USE_OPENSSL
|
|
BIT(ssl_seeded);
|
|
#endif
|
|
BIT(dead); /* a callback returned error, everything needs to crash and
|
|
burn */
|
|
#ifdef DEBUGBUILD
|
|
BIT(warned); /* true after user warned of DEBUGBUILD */
|
|
#endif
|
|
};
|
|
|
|
#endif /* HEADER_CURL_MULTIHANDLE_H */
|