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
|
/*
* (c) 2008 Florian Westphal <fw@strlen.de>, public domain.
*/
#include "portab.h"
/**
* @file
* Functions for AF_ agnostic ipv4/ipv6 handling.
*/
#include <assert.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_GETADDRINFO
#include <netdb.h>
#include <sys/types.h>
#endif
#include "ng_ipaddr.h"
GLOBAL bool
ng_ipaddr_init(ng_ipaddr_t *addr, const char *ip_str, UINT16 port)
{
#ifdef HAVE_WORKING_GETADDRINFO
int ret;
char portstr[64];
struct addrinfo *res0;
struct addrinfo hints;
assert(ip_str);
memset(&hints, 0, sizeof(hints));
#ifdef AI_NUMERICHOST
hints.ai_flags = AI_NUMERICHOST;
#endif
#ifndef WANT_IPV6 /* do not convert ipv6 addresses */
hints.ai_family = AF_INET;
#endif
/* some getaddrinfo implementations require that ai_socktype is set. */
hints.ai_socktype = SOCK_STREAM;
/* silly, but ngircd stores UINT16 in server config, not string */
snprintf(portstr, sizeof(portstr), "%u", (unsigned int) port);
ret = getaddrinfo(ip_str, portstr, &hints, &res0);
if (ret != 0)
return false;
assert(sizeof(*addr) >= (size_t)res0->ai_addrlen);
if (sizeof(*addr) >= (size_t)res0->ai_addrlen)
memcpy(addr, res0->ai_addr, res0->ai_addrlen);
else
ret = -1;
freeaddrinfo(res0);
return ret == 0;
#else /* HAVE_GETADDRINFO */
assert(ip_str);
memset(addr, 0, sizeof *addr);
#ifdef HAVE_sockaddr_in_len
addr->sin4.sin_len = sizeof(addr->sin4);
#endif
addr->sin4.sin_family = AF_INET;
# ifdef HAVE_INET_ATON
if (inet_aton(ip_str, &addr->sin4.sin_addr) == 0)
return false;
# else
addr->sin4.sin_addr.s_addr = inet_addr(ip_str);
if (addr->sin4.sin_addr.s_addr == (unsigned) -1)
return false;
# endif
ng_ipaddr_setport(addr, port);
return true;
#endif /* HAVE_GETADDRINFO */
}
GLOBAL void
ng_ipaddr_setport(ng_ipaddr_t *a, UINT16 port)
{
#ifdef WANT_IPV6
int af;
assert(a != NULL);
af = a->sa.sa_family;
assert(af == AF_INET || af == AF_INET6);
switch (af) {
case AF_INET:
a->sin4.sin_port = htons(port);
break;
case AF_INET6:
a->sin6.sin6_port = htons(port);
break;
}
#else /* WANT_IPV6 */
assert(a != NULL);
assert(a->sin4.sin_family == AF_INET);
a->sin4.sin_port = htons(port);
#endif /* WANT_IPV6 */
}
GLOBAL bool
ng_ipaddr_ipequal(const ng_ipaddr_t *a, const ng_ipaddr_t *b)
{
assert(a != NULL);
assert(b != NULL);
#ifdef WANT_IPV6
if (a->sa.sa_family != b->sa.sa_family)
return false;
assert(ng_ipaddr_salen(a) == ng_ipaddr_salen(b));
switch (a->sa.sa_family) {
case AF_INET6:
return IN6_ARE_ADDR_EQUAL(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
case AF_INET:
return memcmp(&a->sin4.sin_addr, &b->sin4.sin_addr, sizeof(a->sin4.sin_addr)) == 0;
}
return false;
#else
assert(a->sin4.sin_family == AF_INET);
assert(b->sin4.sin_family == AF_INET);
return memcmp(&a->sin4.sin_addr, &b->sin4.sin_addr, sizeof(a->sin4.sin_addr)) == 0;
#endif
}
#ifdef WANT_IPV6
GLOBAL const char *
ng_ipaddr_tostr(const ng_ipaddr_t *addr)
{
static char strbuf[NG_INET_ADDRSTRLEN];
strbuf[0] = 0;
ng_ipaddr_tostr_r(addr, strbuf);
return strbuf;
}
/* str must be at least NG_INET_ADDRSTRLEN bytes long */
GLOBAL bool
ng_ipaddr_tostr_r(const ng_ipaddr_t *addr, char *str)
{
#ifdef HAVE_GETNAMEINFO
const struct sockaddr *sa = (const struct sockaddr *) addr;
int ret;
*str = 0;
ret = getnameinfo(sa, ng_ipaddr_salen(addr),
str, NG_INET_ADDRSTRLEN, NULL, 0, NI_NUMERICHOST);
/*
* avoid leading ':'.
* causes mis-interpretation of client host in e.g. /WHOIS
*/
if (*str == ':') {
char tmp[NG_INET_ADDRSTRLEN] = "0";
ret = getnameinfo(sa, ng_ipaddr_salen(addr),
tmp + 1, (socklen_t)sizeof(tmp) - 1,
NULL, 0, NI_NUMERICHOST);
if (ret == 0)
strlcpy(str, tmp, NG_INET_ADDRSTRLEN);
}
assert (ret == 0);
return ret == 0;
#else
abort(); /* WANT_IPV6 depends on HAVE_GETNAMEINFO */
#endif
}
#endif /* WANT_IPV6 */
/* -eof- */
|
