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
|
/*
* is_ip_address
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "ntp_assert.h"
#include "ntp_stdlib.h"
#include "safecast.h"
/* Don't include ISC's version of IPv6 variables and structures */
#define ISC_IPV6_H 1
#include <isc/netaddr.h>
#include <isc/sockaddr.h>
/*
* Code to tell if we have an IP address
* If we have then return the sockaddr structure
* and set the return value
* see the bind9/getaddresses.c for details
*/
int
is_ip_address(
const char * host,
u_short af,
sockaddr_u * addr
)
{
struct in_addr in4;
struct addrinfo hints;
struct addrinfo *result;
struct sockaddr_in6 *resaddr6;
char tmpbuf[128];
char *pch;
REQUIRE(host != NULL);
REQUIRE(addr != NULL);
ZERO_SOCK(addr);
/*
* Try IPv4, then IPv6. In order to handle the extended format
* for IPv6 scoped addresses (address%scope_ID), we'll use a local
* working buffer of 128 bytes. The length is an ad-hoc value, but
* should be enough for this purpose; the buffer can contain a string
* of at least 80 bytes for scope_ID in addition to any IPv6 numeric
* addresses (up to 46 bytes), the delimiter character and the
* terminating NULL character.
*/
if (AF_UNSPEC == af || AF_INET == af)
if (inet_pton(AF_INET, host, &in4) == 1) {
AF(addr) = AF_INET;
SET_ADDR4N(addr, in4.s_addr);
return TRUE;
}
if (AF_UNSPEC == af || AF_INET6 == af)
if (sizeof(tmpbuf) > strlen(host)) {
if ('[' == host[0]) {
strlcpy(tmpbuf, &host[1], sizeof(tmpbuf));
pch = strchr(tmpbuf, ']');
if (pch != NULL)
*pch = '\0';
} else {
strlcpy(tmpbuf, host, sizeof(tmpbuf));
}
ZERO(hints);
hints.ai_family = AF_INET6;
hints.ai_flags |= AI_NUMERICHOST;
if (getaddrinfo(tmpbuf, NULL, &hints, &result) == 0) {
AF(addr) = AF_INET6;
resaddr6 = UA_PTR(struct sockaddr_in6, result->ai_addr);
SET_ADDR6N(addr, resaddr6->sin6_addr);
SET_SCOPE(addr, resaddr6->sin6_scope_id);
freeaddrinfo(result);
return TRUE;
}
}
/*
* If we got here it was not an IP address
*/
return FALSE;
}
|
