third-party libs
This commit is contained in:
Benjamin Palko
parent
f836927d3a
commit
b154ee9266
3667 changed files with 854591 additions and 0 deletions
439
third-party/curl-7.21.4/lib/hostares.c
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439
third-party/curl-7.21.4/lib/hostares.c
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/***************************************************************************
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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) 1998 - 2011, 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 http://curl.haxx.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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***************************************************************************/
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#include "setup.h"
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#include <string.h>
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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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 HAVE_STDLIB_H
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#include <stdlib.h> /* required for free() prototypes */
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h> /* for the close() proto */
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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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#include <stdlib.h>
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#endif
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#ifdef HAVE_PROCESS_H
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#include <process.h>
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#endif
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#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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#undef in_addr_t
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#define in_addr_t unsigned long
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#endif
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#include "urldata.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 "share.h"
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#include "strerror.h"
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#include "url.h"
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#include "multiif.h"
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#include "inet_pton.h"
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#include "connect.h"
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#include "select.h"
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#include "progress.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.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 ares-enabled builds
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**********************************************************************/
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#ifdef CURLRES_ARES
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/*
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* Curl_resolv_fdset() is called when someone from the outside world (using
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* curl_multi_fdset()) wants to get our fd_set setup and we're 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: CURLE_OK always!
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*/
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int Curl_resolv_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks)
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{
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struct timeval maxtime;
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struct timeval timebuf;
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struct timeval *timeout;
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int max = ares_getsock(conn->data->state.areschannel,
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(ares_socket_t *)socks, numsocks);
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maxtime.tv_sec = CURL_TIMEOUT_RESOLVE;
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maxtime.tv_usec = 0;
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timeout = ares_timeout(conn->data->state.areschannel, &maxtime, &timebuf);
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Curl_expire(conn->data,
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(timeout->tv_sec * 1000) + (timeout->tv_usec/1000));
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return max;
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}
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/*
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* waitperform()
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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
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*/
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static int waitperform(struct connectdata *conn, int timeout_ms)
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{
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struct SessionHandle *data = conn->data;
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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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bitmask = ares_getsock(data->state.areschannel, 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 != 0)
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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, num, timeout_ms);
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else
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nfds = 0;
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if(!nfds)
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/* Call ares_process() unconditonally here, even if we simply timed out
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above, as otherwise the ares name resolve won't timeout! */
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ares_process_fd(data->state.areschannel, 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(data->state.areschannel,
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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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/*
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* Curl_is_resolved() is called repeatedly to check if a previous name resolve
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* request has completed. It should also make sure to time-out if the
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* operation seems to take too long.
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*
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* Returns normal CURLcode errors.
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*/
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CURLcode Curl_is_resolved(struct connectdata *conn,
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struct Curl_dns_entry **dns)
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{
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struct SessionHandle *data = conn->data;
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*dns = NULL;
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waitperform(conn, 0);
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if(conn->async.done) {
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/* we're done, kill the ares handle */
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if(!conn->async.dns) {
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failf(data, "Could not resolve host: %s (%s)", conn->host.dispname,
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ares_strerror(conn->async.status));
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return CURLE_COULDNT_RESOLVE_HOST;
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}
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*dns = conn->async.dns;
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}
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return CURLE_OK;
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}
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/*
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* Curl_wait_for_resolv() waits for a resolve to finish. This function should
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* be avoided since using this risk getting the multi interface to "hang".
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*
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* If 'entry' is non-NULL, make it point to the resolved dns entry
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*
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* Returns CURLE_COULDNT_RESOLVE_HOST if the host was not resolved, and
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* CURLE_OPERATION_TIMEDOUT if a time-out occurred.
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*/
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CURLcode Curl_wait_for_resolv(struct connectdata *conn,
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struct Curl_dns_entry **entry)
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{
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CURLcode rc=CURLE_OK;
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struct SessionHandle *data = conn->data;
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long timeout;
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struct timeval now = Curl_tvnow();
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timeout = Curl_timeleft(data, &now, TRUE);
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if(!timeout)
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timeout = CURL_TIMEOUT_RESOLVE * 1000; /* default name resolve timeout */
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/* Wait for the name resolve query to complete. */
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for(;;) {
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struct timeval *tvp, tv, store;
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long timediff;
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int itimeout;
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int timeout_ms;
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itimeout = (timeout > (long)INT_MAX) ? INT_MAX : (int)timeout;
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store.tv_sec = itimeout/1000;
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store.tv_usec = (itimeout%1000)*1000;
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tvp = ares_timeout(data->state.areschannel, &store, &tv);
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/* use the timeout period ares returned to us above if less than one
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second is left, otherwise just use 1000ms to make sure the progress
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callback gets called frequent enough */
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if(!tvp->tv_sec)
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timeout_ms = (int)(tvp->tv_usec/1000);
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else
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timeout_ms = 1000;
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waitperform(conn, timeout_ms);
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if(conn->async.done)
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break;
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if(Curl_pgrsUpdate(conn)) {
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rc = CURLE_ABORTED_BY_CALLBACK;
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timeout = -1; /* trigger the cancel below */
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}
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else {
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struct timeval now2 = Curl_tvnow();
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timediff = Curl_tvdiff(now2, now); /* spent time */
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timeout -= timediff?timediff:1; /* always deduct at least 1 */
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now = now2; /* for next loop */
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}
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if(timeout < 0) {
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/* our timeout, so we cancel the ares operation */
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ares_cancel(data->state.areschannel);
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break;
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}
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}
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/* Operation complete, if the lookup was successful we now have the entry
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in the cache. */
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if(entry)
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*entry = conn->async.dns;
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if(!conn->async.dns) {
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/* a name was not resolved */
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if((timeout < 0) || (conn->async.status == ARES_ETIMEOUT)) {
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if (conn->bits.httpproxy) {
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failf(data, "Resolving proxy timed out: %s", conn->proxy.dispname);
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rc = CURLE_COULDNT_RESOLVE_PROXY;
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}
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else {
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failf(data, "Resolving host timed out: %s", conn->host.dispname);
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rc = CURLE_COULDNT_RESOLVE_HOST;
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}
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}
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else if(conn->async.done) {
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if (conn->bits.httpproxy) {
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failf(data, "Could not resolve proxy: %s (%s)", conn->proxy.dispname,
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ares_strerror(conn->async.status));
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rc = CURLE_COULDNT_RESOLVE_PROXY;
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}
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else {
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failf(data, "Could not resolve host: %s (%s)", conn->host.dispname,
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ares_strerror(conn->async.status));
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rc = CURLE_COULDNT_RESOLVE_HOST;
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}
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}
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else
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rc = CURLE_OPERATION_TIMEDOUT;
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/* close the connection, since we can't return failure here without
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cleaning up this connection properly */
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conn->bits.close = TRUE;
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}
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return rc;
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}
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/*
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* ares_query_completed_cb() is the callback that ares will call when
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* the host query initiated by ares_gethostbyname() from Curl_getaddrinfo(),
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* when using ares, is completed either successfully or with failure.
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*/
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static void ares_query_completed_cb(void *arg, /* (struct connectdata *) */
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int status,
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#ifdef HAVE_CARES_CALLBACK_TIMEOUTS
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int timeouts,
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#endif
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struct hostent *hostent)
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{
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struct connectdata *conn = (struct connectdata *)arg;
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struct Curl_addrinfo * ai = NULL;
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#ifdef HAVE_CARES_CALLBACK_TIMEOUTS
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(void)timeouts; /* ignored */
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#endif
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switch(status) {
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case CURL_ASYNC_SUCCESS:
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ai = Curl_he2ai(hostent, conn->async.port);
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break;
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case ARES_EDESTRUCTION:
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/* this ares handle is getting destroyed, the 'arg' pointer may not be
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valid! */
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return;
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default:
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/* do nothing */
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break;
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}
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(void)Curl_addrinfo_callback(arg, status, ai);
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}
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/*
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* Curl_getaddrinfo() - when using ares
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*
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* Returns name information about the given hostname and port number. If
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* successful, the 'hostent' is returned and the forth argument will point to
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* memory we need to free after use. That memory *MUST* be freed with
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* Curl_freeaddrinfo(), nothing else.
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*/
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Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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const char *hostname,
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int port,
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int *waitp)
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{
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char *bufp;
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struct SessionHandle *data = conn->data;
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struct in_addr in;
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int family = PF_INET;
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#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
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struct in6_addr in6;
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#endif /* CURLRES_IPV6 */
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*waitp = 0; /* default to synchronous response */
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/* First check if this is an IPv4 address string */
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if(Curl_inet_pton(AF_INET, hostname, &in) > 0) {
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/* This is a dotted IP address 123.123.123.123-style */
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return Curl_ip2addr(AF_INET, &in, hostname, port);
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}
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#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
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/* Otherwise, check if this is an IPv6 address string */
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if (Curl_inet_pton (AF_INET6, hostname, &in6) > 0) {
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/* This must be an IPv6 address literal. */
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return Curl_ip2addr(AF_INET6, &in6, hostname, port);
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}
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switch(conn->ip_version) {
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default:
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#if ARES_VERSION >= 0x010601
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family = PF_UNSPEC; /* supported by c-ares since 1.6.1, so for older
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c-ares versions this just falls through and defaults
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to PF_INET */
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break;
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#endif
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case CURL_IPRESOLVE_V4:
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family = PF_INET;
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break;
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case CURL_IPRESOLVE_V6:
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family = PF_INET6;
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break;
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}
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#endif /* CURLRES_IPV6 */
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bufp = strdup(hostname);
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if(bufp) {
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Curl_safefree(conn->async.hostname);
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conn->async.hostname = bufp;
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conn->async.port = port;
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conn->async.done = FALSE; /* not done */
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conn->async.status = 0; /* clear */
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conn->async.dns = NULL; /* clear */
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conn->async.temp_ai = NULL; /* clear */
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#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
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if(family == PF_UNSPEC) {
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conn->async.num_pending = 2;
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/* areschannel is already setup in the Curl_open() function */
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ares_gethostbyname(data->state.areschannel, hostname, PF_INET,
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ares_query_completed_cb, conn);
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ares_gethostbyname(data->state.areschannel, hostname, PF_INET6,
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ares_query_completed_cb, conn);
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}
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else
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#endif /* CURLRES_IPV6 */
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{
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conn->async.num_pending = 1;
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/* areschannel is already setup in the Curl_open() function */
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ares_gethostbyname(data->state.areschannel, hostname, family,
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ares_query_completed_cb, conn);
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}
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*waitp = 1; /* expect asynchronous response */
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}
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return NULL; /* no struct yet */
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}
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#endif /* CURLRES_ARES */
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