84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/*
|
|
* decodenetnum - return a net number (this is crude, but careful)
|
|
*/
|
|
#include <config.h>
|
|
#include <sys/types.h>
|
|
#include <ctype.h>
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
#include <sys/socket.h>
|
|
#endif
|
|
#ifdef HAVE_NETINET_IN_H
|
|
#include <netinet/in.h>
|
|
#endif
|
|
|
|
#include "ntp.h"
|
|
#include "ntp_stdlib.h"
|
|
#include "ntp_assert.h"
|
|
|
|
/*
|
|
* decodenetnum convert text IP address and port to sockaddr_u
|
|
*
|
|
* Returns 0 for failure, 1 for success.
|
|
*/
|
|
int
|
|
decodenetnum(
|
|
const char *num,
|
|
sockaddr_u *netnum
|
|
)
|
|
{
|
|
struct addrinfo hints, *ai = NULL;
|
|
int err;
|
|
u_short port;
|
|
const char *cp;
|
|
const char *port_str;
|
|
char *pp;
|
|
char *np;
|
|
char name[80];
|
|
|
|
NTP_REQUIRE(num != NULL);
|
|
NTP_REQUIRE(strlen(num) < sizeof(name));
|
|
|
|
port_str = NULL;
|
|
if ('[' != num[0]) {
|
|
/*
|
|
* to distinguish IPv6 embedded colons from a port
|
|
* specification on an IPv4 address, assume all
|
|
* legal IPv6 addresses have at least two colons.
|
|
*/
|
|
pp = strchr(num, ':');
|
|
if (NULL == pp)
|
|
cp = num; /* no colons */
|
|
else if (NULL != strchr(pp + 1, ':'))
|
|
cp = num; /* two or more colons */
|
|
else { /* one colon */
|
|
strlcpy(name, num, sizeof(name));
|
|
cp = name;
|
|
pp = strchr(cp, ':');
|
|
*pp = '\0';
|
|
port_str = pp + 1;
|
|
}
|
|
} else {
|
|
cp = num + 1;
|
|
np = name;
|
|
while (*cp && ']' != *cp)
|
|
*np++ = *cp++;
|
|
*np = 0;
|
|
if (']' == cp[0] && ':' == cp[1] && '\0' != cp[2])
|
|
port_str = &cp[2];
|
|
cp = name;
|
|
}
|
|
ZERO(hints);
|
|
hints.ai_flags = Z_AI_NUMERICHOST;
|
|
err = getaddrinfo(cp, "ntp", &hints, &ai);
|
|
if (err != 0)
|
|
return 0;
|
|
NTP_INSIST(ai->ai_addrlen <= sizeof(*netnum));
|
|
ZERO(*netnum);
|
|
memcpy(netnum, ai->ai_addr, ai->ai_addrlen);
|
|
freeaddrinfo(ai);
|
|
if (NULL == port_str || 1 != sscanf(port_str, "%hu", &port))
|
|
port = NTP_PORT;
|
|
SET_PORT(netnum, port);
|
|
return 1;
|
|
}
|