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/*
* socktoa.c socktoa(), sockporttoa(), and sock_hash()
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <stdio.h>
#include <arpa/inet.h>
#include <isc/result.h>
#include <isc/netaddr.h>
#include <isc/sockaddr.h>
#include "ntp_fp.h"
#include "lib_strbuf.h"
#include "ntp_stdlib.h"
#include "ntp.h"
/*
* socktoa - return a numeric host name from a sockaddr_storage structure
*/
const char *
socktoa(
const sockaddr_u *sock
)
{
int saved_errno;
char * res;
char * addr;
u_long scope;
saved_errno = socket_errno();
LIB_GETBUF(res);
if (NULL == sock) {
strlcpy(res, "(null)", LIB_BUFLENGTH);
} else {
switch(AF(sock)) {
case AF_INET:
case AF_UNSPEC:
inet_ntop(AF_INET, PSOCK_ADDR4(sock), res,
LIB_BUFLENGTH);
break;
case AF_INET6:
inet_ntop(AF_INET6, PSOCK_ADDR6(sock), res,
LIB_BUFLENGTH);
scope = SCOPE_VAR(sock);
if (0 != scope && !strchr(res, '%')) {
addr = res;
LIB_GETBUF(res);
snprintf(res, LIB_BUFLENGTH, "%s%%%lu",
addr, scope);
res[LIB_BUFLENGTH - 1] = '\0';
}
break;
default:
snprintf(res, LIB_BUFLENGTH,
"(socktoa unknown family %d)",
AF(sock));
}
}
errno = saved_errno;
return res;
}
const char *
sockporttoa(
const sockaddr_u *sock
)
{
int saved_errno;
const char * atext;
char * buf;
saved_errno = socket_errno();
atext = socktoa(sock);
LIB_GETBUF(buf);
snprintf(buf, LIB_BUFLENGTH,
(IS_IPV6(sock))
? "[%s]:%hu"
: "%s:%hu",
atext, SRCPORT(sock));
errno = saved_errno;
return buf;
}
/*
* sock_hash - hash a sockaddr_u structure
*/
u_short
sock_hash(
const sockaddr_u *addr
)
{
u_int hashVal;
u_int j;
size_t len;
const u_char *pch;
hashVal = 0;
len = 0;
/*
* We can't just hash the whole thing because there are hidden
* fields in sockaddr_in6 that might be filled in by recvfrom(),
* so just use the family, port and address.
*/
pch = (const void *)&AF(addr);
hashVal = 37 * hashVal + *pch;
if (sizeof(AF(addr)) > 1) {
pch++;
hashVal = 37 * hashVal + *pch;
}
switch(AF(addr)) {
case AF_INET:
pch = (const void *)&SOCK_ADDR4(addr);
len = sizeof(SOCK_ADDR4(addr));
break;
case AF_INET6:
pch = (const void *)&SOCK_ADDR6(addr);
len = sizeof(SOCK_ADDR6(addr));
break;
}
for (j = 0; j < len ; j++)
hashVal = 37 * hashVal + pch[j];
return (u_short)(hashVal & USHRT_MAX);
}
int
sockaddr_masktoprefixlen(
const sockaddr_u * psa
)
{
isc_netaddr_t isc_na;
isc_sockaddr_t isc_sa;
u_int pfxlen;
isc_result_t result;
int rc;
ZERO(isc_sa);
memcpy(&isc_sa.type, psa,
min(sizeof(isc_sa.type), sizeof(*psa)));
isc_netaddr_fromsockaddr(&isc_na, &isc_sa);
result = isc_netaddr_masktoprefixlen(&isc_na, &pfxlen);
rc = (ISC_R_SUCCESS == result)
? (int)pfxlen
: -1;
return rc;
}
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