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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <arpa/inet.h>
#include "netifd.h"
#include "device.h"
#include "interface.h"
#include "interface-ip.h"
#include "proto.h"
#include "ubus.h"
#include "system.h"
static int
addr_cmp(const void *k1, const void *k2, void *ptr)
{
return memcmp(k1, k2, sizeof(struct device_addr) -
offsetof(struct device_addr, mask));
}
static int
route_cmp(const void *k1, const void *k2, void *ptr)
{
return memcmp(k1, k2, sizeof(struct device_route) -
offsetof(struct device_route, mask));
}
static void
interface_update_proto_addr(struct vlist_tree *tree,
struct vlist_node *node_new,
struct vlist_node *node_old)
{
struct interface *iface;
struct device *dev;
struct device_addr *addr;
iface = container_of(tree, struct interface, proto_addr);
dev = iface->l3_dev->dev;
if (node_old) {
addr = container_of(node_old, struct device_addr, node);
if (!(addr->flags & DEVADDR_EXTERNAL))
system_del_address(dev, addr);
free(addr);
}
if (node_new) {
addr = container_of(node_new, struct device_addr, node);
if (!(addr->flags & DEVADDR_EXTERNAL))
system_add_address(dev, addr);
}
}
static void
interface_update_proto_route(struct vlist_tree *tree,
struct vlist_node *node_new,
struct vlist_node *node_old)
{
struct interface *iface;
struct device *dev;
struct device_route *route;
iface = container_of(tree, struct interface, proto_route);
dev = iface->l3_dev->dev;
if (node_old) {
route = container_of(node_old, struct device_route, node);
if (!(route->flags & DEVADDR_EXTERNAL))
system_del_route(dev, route);
free(route);
}
if (node_new) {
route = container_of(node_new, struct device_route, node);
if (!(route->flags & DEVADDR_EXTERNAL))
system_add_route(dev, route);
}
}
void
interface_add_dns_server(struct interface *iface, const char *str)
{
struct dns_server *s;
s = calloc(1, sizeof(*s));
s->af = AF_INET;
if (inet_pton(s->af, str, &s->addr.in))
goto add;
s->af = AF_INET6;
if (inet_pton(s->af, str, &s->addr.in))
goto add;
free(s);
return;
add:
D(INTERFACE, "Add IPv%c DNS server: %s\n",
s->af == AF_INET6 ? '6' : '4', str);
list_add_tail(&s->list, &iface->proto_dns_servers);
}
void
interface_add_dns_server_list(struct interface *iface, struct blob_attr *list)
{
struct blob_attr *cur;
int rem;
blobmsg_for_each_attr(cur, list, rem) {
if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
continue;
if (!blobmsg_check_attr(cur, NULL))
continue;
interface_add_dns_server(iface, blobmsg_data(cur));
}
}
static void
interface_clear_dns_servers(struct interface *iface)
{
struct dns_server *s, *tmp;
list_for_each_entry_safe(s, tmp, &iface->proto_dns_servers, list) {
list_del(&s->list);
free(s);
}
}
static void
interface_clear_dns_search(struct interface *iface)
{
struct dns_search_domain *s, *tmp;
list_for_each_entry_safe(s, tmp, &iface->proto_dns_search, list) {
list_del(&s->list);
free(s);
}
}
void
interface_clear_dns(struct interface *iface)
{
interface_clear_dns_servers(iface);
interface_clear_dns_search(iface);
}
void
interface_write_resolv_conf(void)
{
struct interface *iface;
struct dns_server *s;
struct dns_search_domain *d;
char *path = alloca(strlen(resolv_conf) + 5);
const char *str;
char buf[32];
FILE *f;
sprintf(path, "%s.tmp", resolv_conf);
unlink(path);
f = fopen(path, "w");
if (!f) {
D(INTERFACE, "Failed to open %s for writing\n", path);
return;
}
vlist_for_each_element(&interfaces, iface, node) {
if (iface->state != IFS_UP)
continue;
if (list_empty(&iface->proto_dns_search) &&
list_empty(&iface->proto_dns_servers))
continue;
fprintf(f, "# Interface %s\n", iface->name);
list_for_each_entry(s, &iface->proto_dns_servers, list) {
str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
if (!str)
continue;
fprintf(f, "nameserver %s\n", str);
}
list_for_each_entry(d, &iface->proto_dns_search, list) {
fprintf(f, "search %s\n", d->name);
}
}
fclose(f);
if (rename(path, resolv_conf) < 0) {
D(INTERFACE, "Failed to replace %s\n", resolv_conf);
unlink(path);
}
}
void
interface_ip_update_start(struct interface *iface)
{
interface_clear_dns(iface);
vlist_update(&iface->proto_route);
vlist_update(&iface->proto_addr);
}
void
interface_ip_update_complete(struct interface *iface)
{
vlist_flush(&iface->proto_route);
vlist_flush(&iface->proto_addr);
}
void
interface_ip_init(struct interface *iface)
{
vlist_init(&iface->proto_route, route_cmp, interface_update_proto_route,
struct device_route, node, mask);
vlist_init(&iface->proto_addr, addr_cmp, interface_update_proto_addr,
struct device_addr, node, mask);
}
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