197 lines
5.1 KiB
C
197 lines
5.1 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef __VMS
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#include <in.h>
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#include <inet.h>
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#endif
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#ifdef USE_ARES
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#include <ares.h>
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#include <ares_version.h> /* really old c-ares did not include this by
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itself */
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#endif
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#include "urldata.h"
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#include "asyn.h"
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#include "sendf.h"
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#include "hostip.h"
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#include "hash.h"
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#include "multiif.h"
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#include "select.h"
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#include "share.h"
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#include "url.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/***********************************************************************
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* Only for builds using asynchronous name resolves
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**********************************************************************/
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#ifdef CURLRES_ASYNCH
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#ifdef USE_ARES
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#if ARES_VERSION < 0x010600
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#error "requires c-ares 1.6.0 or newer"
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#endif
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/*
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* Curl_ares_getsock() is called when the outside world (using
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* curl_multi_fdset()) wants to get our fd_set setup and we are talking with
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* ares. The caller must make sure that this function is only called when we
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* have a working ares channel.
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*
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* Returns: sockets-in-use-bitmap
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*/
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int Curl_ares_getsock(struct Curl_easy *data,
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ares_channel channel,
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curl_socket_t *socks)
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{
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struct timeval maxtime = { CURL_TIMEOUT_RESOLVE, 0 };
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struct timeval timebuf;
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int max = ares_getsock(channel,
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(ares_socket_t *)socks, MAX_SOCKSPEREASYHANDLE);
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struct timeval *timeout = ares_timeout(channel, &maxtime, &timebuf);
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timediff_t milli = curlx_tvtoms(timeout);
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Curl_expire(data, milli, EXPIRE_ASYNC_NAME);
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return max;
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}
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/*
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* Curl_ares_perform()
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*
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* 1) Ask ares what sockets it currently plays with, then
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* 2) wait for the timeout period to check for action on ares' sockets.
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* 3) tell ares to act on all the sockets marked as "with action"
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*
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* return number of sockets it worked on, or -1 on error
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*/
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int Curl_ares_perform(ares_channel channel,
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timediff_t timeout_ms)
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{
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int nfds;
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int bitmask;
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ares_socket_t socks[ARES_GETSOCK_MAXNUM];
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struct pollfd pfd[ARES_GETSOCK_MAXNUM];
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int i;
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int num = 0;
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if(!channel)
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return 0;
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bitmask = ares_getsock(channel, socks, ARES_GETSOCK_MAXNUM);
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for(i = 0; i < ARES_GETSOCK_MAXNUM; i++) {
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pfd[i].events = 0;
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pfd[i].revents = 0;
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if(ARES_GETSOCK_READABLE(bitmask, i)) {
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pfd[i].fd = socks[i];
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pfd[i].events |= POLLRDNORM|POLLIN;
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}
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if(ARES_GETSOCK_WRITABLE(bitmask, i)) {
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pfd[i].fd = socks[i];
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pfd[i].events |= POLLWRNORM|POLLOUT;
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}
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if(pfd[i].events)
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num++;
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else
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break;
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}
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if(num) {
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nfds = Curl_poll(pfd, (unsigned int)num, timeout_ms);
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if(nfds < 0)
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return -1;
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}
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else
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nfds = 0;
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if(!nfds)
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/* Call ares_process() unconditionally here, even if we simply timed out
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above, as otherwise the ares name resolve will not timeout! */
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ares_process_fd(channel, ARES_SOCKET_BAD, ARES_SOCKET_BAD);
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else {
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/* move through the descriptors and ask for processing on them */
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for(i = 0; i < num; i++)
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ares_process_fd(channel,
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(pfd[i].revents & (POLLRDNORM|POLLIN)) ?
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pfd[i].fd : ARES_SOCKET_BAD,
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(pfd[i].revents & (POLLWRNORM|POLLOUT)) ?
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pfd[i].fd : ARES_SOCKET_BAD);
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}
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return nfds;
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}
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#endif
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#endif /* CURLRES_ASYNCH */
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#ifdef USE_CURL_ASYNC
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#include "doh.h"
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void Curl_async_shutdown(struct Curl_easy *data)
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{
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#ifdef CURLRES_ARES
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Curl_async_ares_shutdown(data);
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#endif
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#ifdef CURLRES_THREADED
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Curl_async_thrdd_shutdown(data);
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#endif
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#ifndef CURL_DISABLE_DOH
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Curl_doh_cleanup(data);
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#endif
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Curl_safefree(data->state.async.hostname);
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}
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void Curl_async_destroy(struct Curl_easy *data)
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{
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#ifdef CURLRES_ARES
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Curl_async_ares_destroy(data);
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#endif
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#ifdef CURLRES_THREADED
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Curl_async_thrdd_destroy(data);
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#endif
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#ifndef CURL_DISABLE_DOH
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Curl_doh_cleanup(data);
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#endif
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Curl_safefree(data->state.async.hostname);
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}
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#endif /* USE_CURL_ASYNC */
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