is_ip_address.c revision 294491 
1/*
2 * is_ip_address
3 *
4 */
5
6#ifdef HAVE_CONFIG_H
7# include <config.h>
8#endif
9
10#if 0
11#include <stdio.h>
12#include <signal.h>
13#ifdef HAVE_FNMATCH_H
14# include <fnmatch.h>
15# if !defined(FNM_CASEFOLD) && defined(FNM_IGNORECASE)
16#  define FNM_CASEFOLD FNM_IGNORECASE
17# endif
18#endif
19#ifdef HAVE_SYS_PARAM_H
20# include <sys/param.h>
21#endif
22#ifdef HAVE_SYS_IOCTL_H
23# include <sys/ioctl.h>
24#endif
25#ifdef HAVE_SYS_SOCKIO_H	/* UXPV: SIOC* #defines (Frank Vance <fvance@waii.com>) */
26# include <sys/sockio.h>
27#endif
28#ifdef HAVE_SYS_UIO_H
29# include <sys/uio.h>
30#endif
31#endif
32
33#include "ntp_assert.h"
34#include "ntp_stdlib.h"
35#include "safecast.h"
36
37#if 0
38#include "ntp_machine.h"
39#include "ntpd.h"
40#include "ntp_io.h"
41#include "iosignal.h"
42#include "ntp_lists.h"
43#include "ntp_refclock.h"
44#include "ntp_worker.h"
45#include "ntp_request.h"
46#include "timevalops.h"
47#include "timespecops.h"
48#include "ntpd-opts.h"
49#endif
50
51/* Don't include ISC's version of IPv6 variables and structures */
52#define ISC_IPV6_H 1
53#include <isc/mem.h>
54#include <isc/interfaceiter.h>
55#include <isc/netaddr.h>
56#include <isc/result.h>
57#include <isc/sockaddr.h>
58
59
60/*
61 * Code to tell if we have an IP address
62 * If we have then return the sockaddr structure
63 * and set the return value
64 * see the bind9/getaddresses.c for details
65 */
66int
67is_ip_address(
68	const char *	host,
69	u_short		af,
70	sockaddr_u *	addr
71	)
72{
73	struct in_addr in4;
74	struct addrinfo hints;
75	struct addrinfo *result;
76	struct sockaddr_in6 *resaddr6;
77	char tmpbuf[128];
78	char *pch;
79
80	REQUIRE(host != NULL);
81	REQUIRE(addr != NULL);
82
83	ZERO_SOCK(addr);
84
85	/*
86	 * Try IPv4, then IPv6.  In order to handle the extended format
87	 * for IPv6 scoped addresses (address%scope_ID), we'll use a local
88	 * working buffer of 128 bytes.  The length is an ad-hoc value, but
89	 * should be enough for this purpose; the buffer can contain a string
90	 * of at least 80 bytes for scope_ID in addition to any IPv6 numeric
91	 * addresses (up to 46 bytes), the delimiter character and the
92	 * terminating NULL character.
93	 */
94	if (AF_UNSPEC == af || AF_INET == af)
95		if (inet_pton(AF_INET, host, &in4) == 1) {
96			AF(addr) = AF_INET;
97			SET_ADDR4N(addr, in4.s_addr);
98
99			return TRUE;
100		}
101
102	if (AF_UNSPEC == af || AF_INET6 == af)
103		if (sizeof(tmpbuf) > strlen(host)) {
104			if ('[' == host[0]) {
105				strlcpy(tmpbuf, &host[1], sizeof(tmpbuf));
106				pch = strchr(tmpbuf, ']');
107				if (pch != NULL)
108					*pch = '\0';
109			} else {
110				strlcpy(tmpbuf, host, sizeof(tmpbuf));
111			}
112			ZERO(hints);
113			hints.ai_family = AF_INET6;
114			hints.ai_flags |= AI_NUMERICHOST;
115			if (getaddrinfo(tmpbuf, NULL, &hints, &result) == 0) {
116				AF(addr) = AF_INET6;
117				resaddr6 = UA_PTR(struct sockaddr_in6, result->ai_addr);
118				SET_ADDR6N(addr, resaddr6->sin6_addr);
119				SET_SCOPE(addr, resaddr6->sin6_scope_id);
120
121				freeaddrinfo(result);
122				return TRUE;
123			}
124		}
125	/*
126	 * If we got here it was not an IP address
127	 */
128	return FALSE;
129}
130