4990d495fc
ntp 4.2.8p7. Security: CVE-2016-1547, CVE-2016-1548, CVE-2016-1549, CVE-2016-1550 Security: CVE-2016-1551, CVE-2016-2516, CVE-2016-2517, CVE-2016-2518 Security: CVE-2016-2519 Security: FreeBSD-SA-16:16.ntp With hat: so
90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/*
|
|
* 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;
|
|
}
|