47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* $Id: xio-ip4.c,v 1.13 2007/03/06 21:08:38 gerhard Exp $ */
|
|
/* Copyright Gerhard Rieger 2001-2007 */
|
|
/* Published under the GNU General Public License V.2, see file COPYING */
|
|
|
|
/* this file contains the source for IP4 related functions */
|
|
|
|
#include "xiosysincludes.h"
|
|
|
|
#if WITH_IP4
|
|
|
|
#include "xioopen.h"
|
|
#include "xio-socket.h"
|
|
#include "xio-ip.h"
|
|
#include "xio-ip4.h"
|
|
|
|
/* check if peer address is within permitted range.
|
|
return >= 0 if so. */
|
|
int xiocheckrange_ip4(struct sockaddr_in *pa, struct xiorange_ip4 *range) {
|
|
struct in_addr *netaddr_in = &range->netaddr;
|
|
struct in_addr *netmask_in = &range->netmask;
|
|
char addrbuf[256], maskbuf[256];
|
|
char peername[256];
|
|
|
|
/* is provided client address valid? */
|
|
if (pa->sin_addr.s_addr == 0) {
|
|
Warn("invalid client address 0.0.0.0");
|
|
return -1;
|
|
}
|
|
/* client address restriction */
|
|
Debug2("permitted client subnet: %s:%s",
|
|
inet4addr_info(ntohl(netaddr_in->s_addr), addrbuf, sizeof(addrbuf)),
|
|
inet4addr_info(ntohl(netmask_in->s_addr), maskbuf, sizeof(maskbuf)));
|
|
Debug1("client address is 0x%08x",
|
|
ntohl(pa->sin_addr.s_addr));
|
|
Debug1("masked address is 0x%08x",
|
|
ntohl(pa->sin_addr.s_addr & netmask_in->s_addr));
|
|
if ((pa->sin_addr.s_addr & netmask_in->s_addr)
|
|
!= netaddr_in->s_addr) {
|
|
Debug1("client address %s is not permitted",
|
|
sockaddr_inet4_info(pa, peername, sizeof(peername)));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif /* WITH_IP4 */
|