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Diffstat (limited to 'Utilities/cmcurl/lib/multihandle.h')
| -rw-r--r-- | Utilities/cmcurl/lib/multihandle.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/multihandle.h b/Utilities/cmcurl/lib/multihandle.h new file mode 100644 index 0000000000..94bbad77a0 --- /dev/null +++ b/Utilities/cmcurl/lib/multihandle.h @@ -0,0 +1,156 @@ +#ifndef HEADER_CURL_MULTIHANDLE_H +#define HEADER_CURL_MULTIHANDLE_H +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2020, 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.haxx.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 "conncache.h" +#include "psl.h" +#include "socketpair.h" + +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 { + CURLM_STATE_INIT, /* 0 - start in this state */ + CURLM_STATE_CONNECT_PEND, /* 1 - no connections, waiting for one */ + CURLM_STATE_CONNECT, /* 2 - resolve/connect has been sent off */ + CURLM_STATE_WAITRESOLVE, /* 3 - awaiting the resolve to finalize */ + CURLM_STATE_WAITCONNECT, /* 4 - awaiting the TCP connect to finalize */ + CURLM_STATE_WAITPROXYCONNECT, /* 5 - awaiting HTTPS proxy SSL initialization + to complete and/or proxy CONNECT to + finalize */ + CURLM_STATE_SENDPROTOCONNECT, /* 6 - initiate protocol connect procedure */ + CURLM_STATE_PROTOCONNECT, /* 7 - completing the protocol-specific connect + phase */ + CURLM_STATE_DO, /* 8 - start send off the request (part 1) */ + CURLM_STATE_DOING, /* 9 - sending off the request (part 1) */ + CURLM_STATE_DO_MORE, /* 10 - send off the request (part 2) */ + CURLM_STATE_DO_DONE, /* 11 - done sending off request */ + CURLM_STATE_PERFORM, /* 12 - transfer data */ + CURLM_STATE_TOOFAST, /* 13 - wait because limit-rate exceeded */ + CURLM_STATE_DONE, /* 14 - post data transfer operation */ + CURLM_STATE_COMPLETED, /* 15 - operation complete */ + CURLM_STATE_MSGSENT, /* 16 - the operation complete message is sent */ + CURLM_STATE_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(USE_SOCKETPAIR) && !defined(USE_BLOCKING_SOCKETS) +#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. */ + long type; + + /* We have a doubly-linked circular 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 + CURLM_STATE_CONNECT_PEND 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; +}; + +#endif /* HEADER_CURL_MULTIHANDLE_H */ |