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/*
* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <string.h>
#include <stdlib.h>
#include "utils.h"
#include <arpa/inet.h>
#include <netinet/in.h>
void
__vlist_simple_init(struct vlist_simple_tree *tree, int offset)
{
INIT_LIST_HEAD(&tree->list);
tree->version = 1;
tree->head_offset = offset;
}
void
vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
{
char *ptr;
list_del(&node->list);
ptr = (char *) node - tree->head_offset;
free(ptr);
}
void
vlist_simple_flush(struct vlist_simple_tree *tree)
{
struct vlist_simple_node *n, *tmp;
list_for_each_entry_safe(n, tmp, &tree->list, list) {
if ((n->version == tree->version || n->version == -1) &&
tree->version != -1)
continue;
vlist_simple_delete(tree, n);
}
}
void
vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old)
{
struct vlist_simple_node *n, *tmp;
vlist_simple_update(dest);
list_for_each_entry_safe(n, tmp, &old->list, list) {
list_del(&n->list);
vlist_simple_add(dest, n);
}
vlist_simple_flush(dest);
}
void
vlist_simple_flush_all(struct vlist_simple_tree *tree)
{
tree->version = -1;
vlist_simple_flush(tree);
}
unsigned int
parse_netmask_string(const char *str, bool v6)
{
struct in_addr addr;
unsigned int ret;
char *err = NULL;
if (!strchr(str, '.')) {
ret = strtoul(str, &err, 0);
if (err && *err)
goto error;
return ret;
}
if (v6)
goto error;
if (inet_aton(str, &addr) != 1)
goto error;
return 32 - fls(~(ntohl(addr.s_addr)));
error:
return ~0;
}
bool
split_netmask(char *str, unsigned int *netmask, bool v6)
{
char *delim = strchr(str, '/');
if (delim) {
*(delim++) = 0;
*netmask = parse_netmask_string(delim, v6);
}
return true;
}
int
parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
{
char *astr = alloca(strlen(str) + 1);
strcpy(astr, str);
if (!split_netmask(astr, netmask, af == AF_INET6))
return 0;
if (af == AF_INET6) {
if (*netmask > 128)
return 0;
} else {
if (*netmask > 32)
return 0;
}
return inet_pton(af, astr, addr);
}
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