/****************************************************************************
interpret a single element from a interfaces= config line
This handles the following different forms:
1) wildcard interface name
2) DNS name
3) IP/masklen
4) ip/mask
5) bcast/mask
****************************************************************************/
static void interpret_interface(char *token)
{
struct in_addr ip, nmask;
char *p;
int i, added=0;
zero_ip(&ip);
zero_ip(&nmask);
/* first check if it is an interface name */
for (i=0; i<total_probed; i++) {
if (gen_fnmatch(token, probed_ifaces[i].name) == 0) {
add_interface(probed_ifaces[i].ip,
probed_ifaces[i].netmask);
added = 1;
}
}
if (added) return;
/* maybe it is a DNS name */
p = strchr_m(token,'/');
if (!p) {
ip = *interpret_addr2(token);
for (i=0; i<total_probed; i++) {
if (ip.s_addr == probed_ifaces[i].ip.s_addr &&
!ip_equal(allones_ip, probed_ifaces[i].netmask)) {
add_interface(probed_ifaces[i].ip,
probed_ifaces[i].netmask);
return;
}
}
DEBUG(2,("can't determine netmask for %s\n", token));
return;
}
/* parse it into an IP address/netmasklength pair */
*p = 0;
ip = *interpret_addr2(token);
*p++ = '/';
if (strlen(p) > 2) {
nmask = *interpret_addr2(p);
} else {
nmask.s_addr = htonl(((ALLONES >> atoi(p)) ^ ALLONES));
}
/* maybe the first component was a broadcast address */
if (ip.s_addr == MKBCADDR(ip.s_addr, nmask.s_addr) ||
ip.s_addr == MKNETADDR(ip.s_addr, nmask.s_addr)) {
for (i=0; i<total_probed; i++) {
if (same_net(ip, probed_ifaces[i].ip, nmask)) {
add_interface(probed_ifaces[i].ip, nmask);
return;
}
}
DEBUG(2,("Can't determine ip for broadcast address %s\n", token));
return;
}
add_interface(ip, nmask);
}
/**
interpret a single element from a interfaces= config line
This handles the following different forms:
1) wildcard interface name
2) DNS name
3) IP/masklen
4) ip/mask
5) bcast/mask
**/
static void interpret_interface(TALLOC_CTX *mem_ctx,
const char *token,
struct iface_struct *probed_ifaces,
int total_probed,
struct interface **local_interfaces)
{
struct in_addr ip, nmask;
char *p;
char *address;
int i, added=0;
ip.s_addr = 0;
nmask.s_addr = 0;
/* first check if it is an interface name */
for (i=0;i<total_probed;i++) {
if (gen_fnmatch(token, probed_ifaces[i].name) == 0) {
add_interface(mem_ctx, probed_ifaces[i].ip,
probed_ifaces[i].netmask,
local_interfaces);
added = 1;
}
}
if (added) return;
/* maybe it is a DNS name */
p = strchr_m(token,'/');
if (!p) {
/* don't try to do dns lookups on wildcard names */
if (strpbrk(token, "*?") != NULL) {
return;
}
ip.s_addr = interpret_addr2(token).s_addr;
for (i=0;i<total_probed;i++) {
if (ip.s_addr == probed_ifaces[i].ip.s_addr) {
add_interface(mem_ctx, probed_ifaces[i].ip,
probed_ifaces[i].netmask,
local_interfaces);
return;
}
}
DEBUG(2,("can't determine netmask for %s\n", token));
return;
}
address = talloc_strdup(mem_ctx, token);
p = strchr_m(address,'/');
/* parse it into an IP address/netmasklength pair */
*p++ = 0;
ip.s_addr = interpret_addr2(address).s_addr;
if (strlen(p) > 2) {
nmask.s_addr = interpret_addr2(p).s_addr;
} else {
nmask.s_addr = htonl(((ALLONES >> atoi(p)) ^ ALLONES));
}
/* maybe the first component was a broadcast address */
if (ip.s_addr == MKBCADDR(ip.s_addr, nmask.s_addr) ||
ip.s_addr == MKNETADDR(ip.s_addr, nmask.s_addr)) {
for (i=0;i<total_probed;i++) {
if (same_net_v4(ip, probed_ifaces[i].ip, nmask)) {
add_interface(mem_ctx, probed_ifaces[i].ip, nmask,
local_interfaces);
talloc_free(address);
return;
}
}
DEBUG(2,("Can't determine ip for broadcast address %s\n", address));
talloc_free(address);
return;
}
add_interface(mem_ctx, ip, nmask, local_interfaces);
talloc_free(address);
}
