1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/***************************************************************************
* _ _ ____ _
* 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 "curl_setup.h"
/***********************************************************************
* Only for IPv6-enabled builds
**********************************************************************/
#ifdef CURLRES_IPV6
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef __VMS
#include <in.h>
#include <inet.h>
#endif
#include "urldata.h"
#include "cfilters.h"
#include "sendf.h"
#include "hostip.h"
#include "hash.h"
#include "share.h"
#include "url.h"
#include "curlx/inet_pton.h"
#include "connect.h"
/* The last 2 #include files should be in this order */
#include "curl_memory.h"
#include "memdebug.h"
#ifdef CURLRES_SYNCH
#ifdef DEBUG_ADDRINFO
static void dump_addrinfo(const struct Curl_addrinfo *ai)
{
curl_mprintf("dump_addrinfo:\n");
for(; ai; ai = ai->ai_next) {
char buf[INET6_ADDRSTRLEN];
curl_mprintf(" fam %2d, CNAME %s, ",
ai->ai_family,
ai->ai_canonname ? ai->ai_canonname : "<none>");
Curl_printable_address(ai, buf, sizeof(buf));
curl_mprintf("%s\n", buf);
}
}
#else
#define dump_addrinfo(x) Curl_nop_stmt
#endif
/*
* Curl_sync_getaddrinfo() when built IPv6-enabled (non-threading and
* non-ares version).
*
* Returns name information about the given hostname and port number. If
* successful, the 'addrinfo' is returned and the fourth argument will point
* to memory we need to free after use. That memory *MUST* be freed with
* Curl_freeaddrinfo(), nothing else.
*/
struct Curl_addrinfo *Curl_sync_getaddrinfo(struct Curl_easy *data,
const char *hostname,
int port,
int ip_version)
{
struct addrinfo hints;
struct Curl_addrinfo *res;
int error;
char sbuf[12];
char *sbufptr = NULL;
#ifndef USE_RESOLVE_ON_IPS
char addrbuf[128];
#endif
int pf = PF_INET;
if((ip_version != CURL_IPRESOLVE_V4) && Curl_ipv6works(data))
/* The stack seems to be IPv6-enabled */
pf = PF_UNSPEC;
memset(&hints, 0, sizeof(hints));
hints.ai_family = pf;
hints.ai_socktype =
(Curl_conn_get_transport(data, data->conn) == TRNSPRT_TCP) ?
SOCK_STREAM : SOCK_DGRAM;
#ifndef USE_RESOLVE_ON_IPS
/*
* The AI_NUMERICHOST must not be set to get synthesized IPv6 address from
* an IPv4 address on iOS and macOS.
*/
if((curlx_inet_pton(AF_INET, hostname, addrbuf) == 1) ||
(curlx_inet_pton(AF_INET6, hostname, addrbuf) == 1)) {
/* the given address is numerical only, prevent a reverse lookup */
hints.ai_flags = AI_NUMERICHOST;
}
#endif
if(port) {
curl_msnprintf(sbuf, sizeof(sbuf), "%d", port);
sbufptr = sbuf;
}
error = Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &res);
if(error) {
infof(data, "getaddrinfo(3) failed for %s:%d", hostname, port);
return NULL;
}
if(port) {
Curl_addrinfo_set_port(res, port);
}
dump_addrinfo(res);
return res;
}
#endif /* CURLRES_SYNCH */
#endif /* CURLRES_IPV6 */