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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* In order to be useful for every potential user, curl and libcurl are
* dual-licensed under the MPL and the MIT/X-derivate licenses.
*
* 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 MPL or the MIT/X-derivate
* licenses. You may pick one of these licenses.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
*****************************************************************************/
#include "setup.h"
#include <string.h>
#include <errno.h>
#define _REENTRANT
#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
#include <winsock.h>
#else
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#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 <inet.h>
#include <stdlib.h>
#endif
#endif
#include "urldata.h"
#include "sendf.h"
#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
#include "inet_ntoa_r.h"
#endif
/* The last #include file should be: */
#ifdef MALLOCDEBUG
#include "memdebug.h"
#endif
/* --- resolve name or IP-number --- */
static char *MakeIP(unsigned long num,char *addr, int addr_len)
{
#if defined(HAVE_INET_NTOA) || defined(HAVE_INET_NTOA_R)
struct in_addr in;
in.s_addr = htonl(num);
#if defined(HAVE_INET_NTOA_R)
inet_ntoa_r(in,addr,addr_len);
#else
strncpy(addr,inet_ntoa(in),addr_len);
#endif
#else
unsigned char *paddr;
num = htonl(num); /* htonl() added to avoid endian probs */
paddr = (unsigned char *)#
sprintf(addr, "%u.%u.%u.%u", paddr[0], paddr[1], paddr[2], paddr[3]);
#endif
return (addr);
}
#ifdef ENABLE_IPV6
struct addrinfo *Curl_getaddrinfo(struct SessionHandle *data,
char *hostname,
int port)
{
struct addrinfo hints, *res;
int error;
char sbuf[NI_MAXSERV];
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_CANONNAME;
snprintf(sbuf, sizeof(sbuf), "%d", port);
error = getaddrinfo(hostname, sbuf, &hints, &res);
if (error) {
infof(data, "getaddrinfo(3) failed for %s\n", hostname);
return NULL;
}
return res;
}
#endif
/* The original code to this function was once stolen from the Dancer source
code, written by Bjorn Reese, it has since been patched and modified
considerably. */
#ifndef INADDR_NONE
#define INADDR_NONE (unsigned long) ~0
#endif
struct hostent *Curl_gethost(struct SessionHandle *data,
char *hostname,
char **bufp)
{
struct hostent *h = NULL;
unsigned long in;
int ret; /* this variable is unused on several platforms but used on some */
#define CURL_NAMELOOKUP_SIZE 9000
/* Allocate enough memory to hold the full name information structs and
* everything. OSF1 is known to require at least 8872 bytes. The buffer
* required for storing all possible aliases and IP numbers is according to
* Stevens' Unix Network Programming 2nd editor, p. 304: 8192 bytes! */
char *buf = (char *)malloc(CURL_NAMELOOKUP_SIZE);
if(!buf)
return NULL; /* major failure */
*bufp = buf;
ret = 0; /* to prevent the compiler warning */
if ( (in=inet_addr(hostname)) != INADDR_NONE ) {
struct in_addr *addrentry;
h = (struct hostent*)buf;
h->h_addr_list = (char**)(buf + sizeof(*h));
addrentry = (struct in_addr*)(h->h_addr_list + 2);
addrentry->s_addr = in;
h->h_addr_list[0] = (char*)addrentry;
h->h_addr_list[1] = NULL;
h->h_addrtype = AF_INET;
h->h_length = sizeof(*addrentry);
h->h_name = *(h->h_addr_list) + h->h_length;
/* bad one h->h_name = (char*)(h->h_addr_list + h->h_length); */
MakeIP(ntohl(in),h->h_name, CURL_NAMELOOKUP_SIZE - (long)(h->h_name) + (long)buf);
}
#if defined(HAVE_GETHOSTBYNAME_R)
else {
int h_errnop;
/* Workaround for gethostbyname_r bug in qnx nto. It is also _required_
for some of these functions. */
memset(buf, 0, CURL_NAMELOOKUP_SIZE);
#ifdef HAVE_GETHOSTBYNAME_R_5
/* Solaris, IRIX and more */
if ((h = gethostbyname_r(hostname,
(struct hostent *)buf,
buf + sizeof(struct hostent),
CURL_NAMELOOKUP_SIZE - sizeof(struct hostent),
&h_errnop)) == NULL )
#endif
#ifdef HAVE_GETHOSTBYNAME_R_6
/* Linux */
if( gethostbyname_r(hostname,
(struct hostent *)buf,
buf + sizeof(struct hostent),
CURL_NAMELOOKUP_SIZE - sizeof(struct hostent),
&h, /* DIFFERENCE */
&h_errnop))
#endif
#ifdef HAVE_GETHOSTBYNAME_R_3
/* AIX, Digital Unix, HPUX 10, more? */
if(CURL_NAMELOOKUP_SIZE >=
(sizeof(struct hostent)+sizeof(struct hostent_data)))
/* August 22nd, 2000: Albert Chin-A-Young brought an updated version
* that should work! September 20: Richard Prescott worked on the buffer
* size dilemma. */
ret = gethostbyname_r(hostname,
(struct hostent *)buf,
(struct hostent_data *)(buf + sizeof(struct hostent)));
else
ret = -1; /* failure, too smallish buffer size */
/* result expected in h */
h = (struct hostent*)buf;
h_errnop= errno; /* we don't deal with this, but set it anyway */
if(ret)
#endif
{
infof(data, "gethostbyname_r(2) failed for %s\n", hostname);
h = NULL; /* set return code to NULL */
free(buf);
*bufp=NULL;
}
#else
else {
if ((h = gethostbyname(hostname)) == NULL ) {
infof(data, "gethostbyname(2) failed for %s\n", hostname);
free(buf);
*bufp=NULL;
}
#endif
}
return (h);
}
/*
* local variables:
* eval: (load-file "../curl-mode.el")
* end:
* vim600: et sw=2 ts=2 sts=2 tw=78 fdm=marker
* vim<600: et sw=2 ts=2 sts=2 tw=78
*/
|
