/* INTERFACE MANAGEMENT */
int
ifconfig(char *name,
int flags,
ipaddr_t ipaddr,
ipaddr_t netmask,
ipaddr_t broadcast) {
if_entry_p ife;
int ret;
mk_ip_table_rw();
EnterCritical();
if ((ife = get_if_by_name(name))) {
bcopy(ipaddr, ife->ipaddr, 4);
bcopy(netmask, ife->netmask, 4);
bcopy(broadcast, ife->broadcast, 4);
apply_netmask(ife->net, ipaddr, netmask);
ife->flags = flags;
ret = 0;
} else {
fprintf(stderr,"ifconfig: Device not found: %s\n",name);
ret = -1;
}
ExitCritical();
mk_ip_table_ro();
return ret;
}
/* searches only on interfaces */
int
find_if(ipaddr_t ipaddr, int *ifnum) {
if_entry_p ife;
ipaddr_t net;
int i;
for (i = 0 ; i < GETNUMIFENTRIES; i++) {
ife = GETIFP(i);
if (ife->flags & IF_DOWN) continue;
apply_netmask(net, ipaddr, ife->netmask);
if (bcmp(&net,ife->net,4) == 0) {
*ifnum = i;
if (ife->flags & IF_BROADCAST &&
bcmp(ipaddr,ife->broadcast,4) == 0) {
return IFRET_BROADCAST;
} else if (ife->flags & IF_LOOPBACK)
return IFRET_LOOPBACK;
else if (bcmp(ipaddr,ife->ipaddr,4) == 0)
/* if it is our address, and we are not loopback reject */
return IFRET_NOTFOUND;
else
return IFRET_RESOLVE;
}
}
return IFRET_NOTFOUND;
}
/* searches only on routes */
int
find_route(ipaddr_t ipaddr, ipaddr_t gateway) {
route_entry_p routep;
ipaddr_t net;
int i;
for (i = 0 ; i < GETNUMROUTEENTRIES; i++) {
routep = GETROUTEP(i);
apply_netmask(net, ipaddr, routep->netmask);
if (bcmp(&net,routep->net,4) == 0) {
bcopy(routep->dst,gateway,4);
return 0;
}
}
return -1;
}
bool ip_in_subnet(t_ip_addr *ip, t_ip_addr *subnet, int mask) {
if ((ip == NULL) || (subnet == NULL)) {
return false;
} else if (ip->family != subnet->family) {
return false;
}
/* Apply mask to client IP */
t_ip_addr test_ip;
copy_ip(&test_ip, ip);
if (apply_netmask(&test_ip, mask) == -1) {
return false;
}
return same_ip(&test_ip, subnet);
}