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e9ae1bd404
The `transport` to use for a transfer, e.g. TCP/QUIC/UNIX/UDP, is initially selected by options and protocol used. This is set at the `struct connectdata` as `transport` member. During connection establishment, this transport may change due to Alt-Svc or Happy-Eyeballing. Most common is the switch from TCP to QUIC. Rename the connection member to `transport_wanted` and add a way to query the connection for the transport in use via a new connection filter query. The filter query can also be used in the happy eyeballing attempts when code needs to know which transport is used by the "filter below". This happens in wolfssl initialization, as one example. Closes #17923
146 lines
4.1 KiB
C
146 lines
4.1 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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/***********************************************************************
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* Only for IPv6-enabled builds
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**********************************************************************/
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#ifdef CURLRES_IPV6
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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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#include "urldata.h"
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#include "cfilters.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 "url.h"
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#include "curlx/inet_pton.h"
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#include "connect.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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#if defined(CURLRES_SYNCH)
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#ifdef DEBUG_ADDRINFO
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static void dump_addrinfo(const struct Curl_addrinfo *ai)
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{
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printf("dump_addrinfo:\n");
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for(; ai; ai = ai->ai_next) {
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char buf[INET6_ADDRSTRLEN];
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printf(" fam %2d, CNAME %s, ",
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ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>");
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Curl_printable_address(ai, buf, sizeof(buf));
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printf("%s\n", buf);
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}
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}
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#else
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#define dump_addrinfo(x) Curl_nop_stmt
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#endif
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/*
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* Curl_sync_getaddrinfo() when built IPv6-enabled (non-threading and
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* non-ares version).
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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 'addrinfo' is returned and the fourth argument will point
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* to 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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struct Curl_addrinfo *Curl_sync_getaddrinfo(struct Curl_easy *data,
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const char *hostname,
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int port,
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int ip_version)
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{
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struct addrinfo hints;
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struct Curl_addrinfo *res;
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int error;
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char sbuf[12];
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char *sbufptr = NULL;
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#ifndef USE_RESOLVE_ON_IPS
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char addrbuf[128];
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#endif
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int pf = PF_INET;
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if((ip_version != CURL_IPRESOLVE_V4) && Curl_ipv6works(data))
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/* The stack seems to be IPv6-enabled */
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pf = PF_UNSPEC;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = pf;
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hints.ai_socktype =
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(Curl_conn_get_transport(data, data->conn) == TRNSPRT_TCP) ?
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SOCK_STREAM : SOCK_DGRAM;
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#ifndef USE_RESOLVE_ON_IPS
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/*
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* The AI_NUMERICHOST must not be set to get synthesized IPv6 address from
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* an IPv4 address on iOS and macOS.
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*/
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if((1 == curlx_inet_pton(AF_INET, hostname, addrbuf)) ||
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(1 == curlx_inet_pton(AF_INET6, hostname, addrbuf))) {
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/* the given address is numerical only, prevent a reverse lookup */
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hints.ai_flags = AI_NUMERICHOST;
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}
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#endif
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if(port) {
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msnprintf(sbuf, sizeof(sbuf), "%d", port);
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sbufptr = sbuf;
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}
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error = Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &res);
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if(error) {
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infof(data, "getaddrinfo(3) failed for %s:%d", hostname, port);
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return NULL;
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}
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if(port) {
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Curl_addrinfo_set_port(res, port);
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}
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dump_addrinfo(res);
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return res;
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}
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#endif /* CURLRES_SYNCH */
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#endif /* CURLRES_IPV6 */
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