ip_addr.c
4e2fdd79
 /*
  * $Id$
  *
  *
  * ip address & address family related functions
  */
 
381659ac
 #include <stdlib.h>
4e2fdd79
 #include <stdio.h>
 
 #include "ip_addr.h"
 #include "dprint.h"
 
 
 struct net* mk_net(struct ip_addr* ip, struct ip_addr* mask)
 {
 	struct net* n;
 	
 	if ((ip->af != mask->af) || (ip->len != mask->len)){
 		LOG(L_CRIT, "ERROR: mk_net: trying to use a different mask family"
 				" (eg. ipv4/ipv6mask or ipv6/ipv4mask)\n");
 		goto error;
 	}
 	n=(struct net*)malloc(sizeof(struct net));
 	if (n==0){ 
 		LOG(L_CRIT, "ERROR: mk_net: memory allocation failure\n");
 		goto error;
 	}
 	n->ip=*ip;
 	n->mask=*mask;
 	return n;
 error:
 	return 0;
 }
 
 
 
 struct net* mk_net_bitlen(struct ip_addr* ip, unsigned int bitlen)
 {
 	struct net* n;
 	int r;
 	
 	if (bitlen>ip->len*8){
 		LOG(L_CRIT, "ERROR: mk_net_bitlen: bad bitlen number %d\n", bitlen);
 		goto error;
 	}
 	n=(struct net*)malloc(sizeof(struct net));
 	if (n==0){
 		LOG(L_CRIT, "ERROR: mk_net_bitlen: memory allocation failure\n"); 
 		goto error;
 	}
 	memset(n,0, sizeof(struct net));
 	n->ip=*ip;
 	for (r=0;r<bitlen/8;r++) n->mask.u.addr[r]=0xff;
 	if (bitlen%8) n->mask.u.addr[r]=  ~((1<<(8-(bitlen%8)))-1);
 	n->mask.af=ip->af;
 	n->mask.len=ip->len;
 	
 	return n;
 error:
 	return 0;
 }
 
 
 
 void print_ip(struct ip_addr* ip)
 {
 	switch(ip->af){
 		case AF_INET:
 			DBG("%d.%d.%d.%d",	ip->u.addr[0],
 								ip->u.addr[1],
 								ip->u.addr[2],
 								ip->u.addr[3]);
 			break;
 		case AF_INET6:
 			DBG("%x:%x:%x:%x:%x:%x:%x:%x",	htons(ip->u.addr16[0]),
 											htons(ip->u.addr16[1]),
 											htons(ip->u.addr16[2]),
 											htons(ip->u.addr16[3]),
 											htons(ip->u.addr16[4]),
 											htons(ip->u.addr16[5]),
 											htons(ip->u.addr16[6]),
 											htons(ip->u.addr16[7])
 				);
 			break;
 		default:
 			DBG("print_ip: warning unknown adress family %d\n", ip->af);
 	}
 }
 
 
 
 void stdout_print_ip(struct ip_addr* ip)
 {
 	switch(ip->af){
 		case AF_INET:
 			printf("%d.%d.%d.%d",	ip->u.addr[0],
 								ip->u.addr[1],
 								ip->u.addr[2],
 								ip->u.addr[3]);
 			break;
 		case AF_INET6:
 			printf("%x:%x:%x:%x:%x:%x:%x:%x",	htons(ip->u.addr16[0]),
 											htons(ip->u.addr16[1]),
 											htons(ip->u.addr16[2]),
 											htons(ip->u.addr16[3]),
 											htons(ip->u.addr16[4]),
 											htons(ip->u.addr16[5]),
 											htons(ip->u.addr16[6]),
 											htons(ip->u.addr16[7])
 				);
 			break;
 		default:
 			DBG("print_ip: warning unknown adress family %d\n", ip->af);
 	}
 }
 
 
 
 void print_net(struct net* net)
 {
 	if (net==0){
 		LOG(L_WARN, "ERROR: print net: null pointer\n");
 		return;
 	}
 	print_ip(&net->ip); DBG("/"); print_ip(&net->mask);
 }