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
|
/* Get address information (partial implementation).
Copyright (C) 1997, 2001, 2002, 2004, 2005 Free Software Foundation, Inc.
Contributed by Simon Josefsson <simon@josefsson.org>.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "getaddrinfo.h"
/* Get calloc. */
#include <stdlib.h>
/* Get memcpy. */
#include <string.h>
#include <stdbool.h>
#include "gettext.h"
#define _(String) gettext (String)
#define N_(String) String
#include "strdup.h"
static inline bool
validate_family (int family)
{
/* FIXME: Support more families. */
#if HAVE_IPV4
if (family == PF_INET)
return true;
#endif
#if HAVE_IPV6
if (family == PF_INET6)
return true;
#endif
if (family == PF_UNSPEC)
return true;
return false;
}
/* Translate name of a service location and/or a service name to set of
socket addresses. */
int
getaddrinfo (const char *restrict nodename,
const char *restrict servname,
const struct addrinfo *restrict hints,
struct addrinfo **restrict res)
{
struct addrinfo *tmp;
struct servent *se;
struct hostent *he;
size_t sinlen;
if (hints && (hints->ai_flags & ~AI_CANONNAME))
/* FIXME: Support more flags. */
return EAI_BADFLAGS;
if (hints && !validate_family (hints->ai_family))
return EAI_FAMILY;
if (hints &&
hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
/* FIXME: Support other socktype. */
return EAI_SOCKTYPE; /* FIXME: Better return code? */
if (!nodename)
/* FIXME: Support server bind mode. */
return EAI_NONAME;
if (servname)
{
const char *proto =
(hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
/* FIXME: Use getservbyname_r if available. */
se = getservbyname (servname, proto);
if (!se)
return EAI_SERVICE;
}
/* FIXME: Use gethostbyname_r if available. */
he = gethostbyname (nodename);
if (!he || he->h_addr_list[0] == NULL)
return EAI_NONAME;
switch (he->h_addrtype)
{
#if HAVE_IPV6
case PF_INET6:
sinlen = sizeof (struct sockaddr_in6);
break;
#endif
#if HAVE_IPV4
case PF_INET:
sinlen = sizeof (struct sockaddr_in);
break;
#endif
default:
return EAI_NODATA;
}
tmp = calloc (1, sizeof (*tmp) + sinlen);
if (!tmp)
return EAI_MEMORY;
switch (he->h_addrtype)
{
#if HAVE_IPV6
case PF_INET6:
{
struct sockaddr_in6 *sinp = (char *) tmp + sizeof (*tmp);
if (se)
sinp->sin6_port = se->s_port;
if (he->h_length != sizeof (sinp->sin6_addr))
return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
memcpy (&sinp->sin6_addr, he->h_addr_list[0], he->h_length);
tmp->ai_addr = (struct sockaddr *) sinp;
tmp->ai_addrlen = sinlen;
}
break;
#endif
#if HAVE_IPV4
case PF_INET:
{
struct sockaddr_in *sinp = (char *) tmp + sizeof (*tmp);
if (se)
sinp->sin_port = se->s_port;
if (he->h_length != sizeof (sinp->sin_addr))
return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
memcpy (&sinp->sin_addr, he->h_addr_list[0], he->h_length);
tmp->ai_addr = (struct sockaddr *) sinp;
tmp->ai_addrlen = sinlen;
}
break;
#endif
default:
free (tmp);
return EAI_NODATA;
}
if (hints && hints->ai_flags & AI_CANONNAME)
{
const char *cn;
if (he->h_name)
cn = he->h_name;
else
cn = nodename;
tmp->ai_canonname = strdup (cn);
if (!tmp->ai_canonname)
{
free (tmp);
return EAI_MEMORY;
}
}
tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
tmp->ai_addr->sa_family = he->h_addrtype;
/* FIXME: If more than one address, create linked list of addrinfo's. */
*res = tmp;
return 0;
}
/* Free `addrinfo' structure AI including associated storage. */
void
freeaddrinfo (struct addrinfo *ai)
{
while (ai)
{
struct addrinfo *cur;
cur = ai;
ai = ai->ai_next;
if (cur->ai_canonname) free (cur->ai_canonname);
free (cur);
}
}
|
