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
226
227
228
229
230
231
232
|
/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include "common/sockaddr.h"
#include "libknot/consts.h"
int sockaddr_init(sockaddr_t *addr, int af)
{
/* Reset pointer. */
memset(addr, 0, sizeof(sockaddr_t));
/* Initialize address size. */
switch(af) {
case AF_INET:
addr->len = sizeof(struct sockaddr_in);
addr->prefix = IPV4_PREFIXLEN;
break;
#ifndef DISABLE_IPV6
case AF_INET6:
addr->len = sizeof(struct sockaddr_in6);
addr->prefix = IPV6_PREFIXLEN;
break;
#endif
default:
return -1;
}
return 0;
}
int sockaddr_isvalid(sockaddr_t *addr)
{
return addr && (addr->len > 0);
}
int sockaddr_copy(sockaddr_t *dst, const sockaddr_t *src)
{
if (memcpy(dst, src, sizeof(sockaddr_t)) != NULL) {
return 0;
}
return -1;
}
int sockaddr_set(sockaddr_t *dst, int family, const char* addr, int port)
{
if (!dst || !addr || port < 0) {
return -1;
}
/* Initialize. */
dst->len = 0;
sockaddr_init(dst, family);
/* Initialize depending on address family. */
void *paddr = 0;
switch(family) {
case AF_INET:
dst->addr4.sin_family = family;
dst->addr4.sin_port = htons(port);
paddr = &dst->addr4.sin_addr;
dst->addr4.sin_addr.s_addr = INADDR_ANY;
dst->prefix = IPV4_PREFIXLEN;
break;
#ifndef DISABLE_IPV6
case AF_INET6:
dst->addr6.sin6_family = family;
dst->addr6.sin6_port = htons(port);
paddr = &dst->addr6.sin6_addr;
memcpy(&dst->addr6.sin6_addr,
&in6addr_any, sizeof(in6addr_any));
dst->prefix = IPV6_PREFIXLEN;
break;
#endif
default:
return -1;
}
/* Convert address. */
return inet_pton(family, addr, paddr);
}
int sockaddr_setprefix(sockaddr_t *dst, int prefix)
{
if (dst == NULL || prefix < 0) {
return -1;
}
return dst->prefix = prefix;
}
int sockaddr_tostr(const sockaddr_t *addr, char *dst, size_t size)
{
if (!addr || !dst || size == 0) {
return -1;
}
/* Check unsupported IPv6. */
#ifndef DISABLE_IPV6
size_t minlen = INET6_ADDRSTRLEN;
#else
size_t minlen = INET_ADDRSTRLEN;
#endif
/* Check minimum length. */
if (size < minlen) {
return -1;
}
/* Convert. */
#ifdef DISABLE_IPV6
dst[0] = '\0';
#else
/* Load IPv6 addr if default. */
if (addr->len == sizeof(struct sockaddr_in6)) {
inet_ntop(AF_INET6, &addr->addr6.sin6_addr, dst, size);
}
#endif
/* Load IPv4 if set. */
if (addr->len == sizeof(struct sockaddr_in)) {
inet_ntop(AF_INET, &addr->addr4.sin_addr, dst, size);
}
return 0;
}
int sockaddr_portnum(const sockaddr_t *addr)
{
if (!addr) {
return -1;
}
switch(addr->len) {
/* IPv4 */
case sizeof(struct sockaddr_in):
return ntohs(addr->addr4.sin_port);
break;
/* IPv6 */
#ifndef DISABLE_IPV6
case sizeof(struct sockaddr_in6):
return ntohs(addr->addr6.sin6_port);
break;
#endif
/* N/A */
default:
return -1;
break;
}
}
int sockaddr_family(const sockaddr_t *addr)
{
switch(addr->len) {
case sizeof(struct sockaddr_in): return AF_INET; break;
#ifndef DISABLE_IPV6
case sizeof(struct sockaddr_in6): return AF_INET6; break;
#endif
default: return 0; break;
}
}
void sockaddr_prep(sockaddr_t *addr)
{
#ifndef DISABLE_IPV6
addr->len = sizeof(struct sockaddr_in6);
#else
addr->len = sizeof(struct sockaddr_in);
#endif
}
char *sockaddr_hostname(void)
{
/* Fetch hostname. */
char host[KNOT_DNAME_MAXLEN] = {'\0'};
if (gethostname(host, KNOT_DNAME_MAXLEN) != 0) {
return NULL;
}
/* Fetch canonical name for this address/DNS. */
struct addrinfo hints, *info = NULL;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_CANONNAME;
if (getaddrinfo(host, "domain", &hints, &info) != 0) {
return NULL;
}
/* Fetch first valid hostname. */
char *hname = NULL;
struct addrinfo *p = NULL;
for (p = info; p != NULL; p = p->ai_next) {
if (p->ai_canonname) {
hname = strdup(p->ai_canonname);
break;
}
}
/* No valid hostname found, resort to gethostname() result */
if (hname == NULL) {
hname = strdup(host);
}
freeaddrinfo(info);
return hname;
}
|
