247 lines
5.2 KiB
C
247 lines
5.2 KiB
C
/*
|
|
*
|
|
* Wireless daemon for Linux
|
|
*
|
|
* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <net/if_arp.h>
|
|
#include <net/if.h>
|
|
#include <ell/ell.h>
|
|
|
|
#include "src/wiphy.h"
|
|
#include "src/netdev.h"
|
|
|
|
struct netdev_data {
|
|
uint32_t index;
|
|
uint32_t flags;
|
|
char ifname[IF_NAMESIZE];
|
|
};
|
|
|
|
static struct l_netlink *rtnl = NULL;
|
|
static struct l_hashmap *netdev_list = NULL;
|
|
|
|
static void do_debug(const char *str, void *user_data)
|
|
{
|
|
const char *prefix = user_data;
|
|
|
|
l_info("%s%s", prefix, str);
|
|
}
|
|
|
|
static size_t rta_add_u8(void *rta_buf, unsigned short type, uint8_t value)
|
|
{
|
|
struct rtattr *rta = rta_buf;
|
|
|
|
rta->rta_len = RTA_LENGTH(sizeof(uint8_t));
|
|
rta->rta_type = type;
|
|
*((uint8_t *) RTA_DATA(rta)) = value;
|
|
|
|
return RTA_SPACE(sizeof(uint8_t));
|
|
}
|
|
|
|
struct cb_data {
|
|
netdev_command_func_t callback;
|
|
void *user_data;
|
|
};
|
|
|
|
static void netlink_result(int error, uint16_t type, const void *data,
|
|
uint32_t len, void *user_data)
|
|
{
|
|
struct cb_data *cb_data = user_data;
|
|
|
|
if (!cb_data)
|
|
return;
|
|
|
|
cb_data->callback(error < 0 ? false : true, cb_data->user_data);
|
|
|
|
l_free(cb_data);
|
|
}
|
|
|
|
void netdev_set_linkmode_and_operstate(uint32_t ifindex,
|
|
uint8_t linkmode, uint8_t operstate,
|
|
netdev_command_func_t callback, void *user_data)
|
|
{
|
|
struct ifinfomsg *rtmmsg;
|
|
void *rta_buf;
|
|
size_t bufsize;
|
|
struct cb_data *cb_data = NULL;
|
|
|
|
bufsize = NLMSG_LENGTH(sizeof(struct ifinfomsg)) +
|
|
RTA_SPACE(sizeof(uint8_t)) + RTA_SPACE(sizeof(uint8_t));
|
|
|
|
rtmmsg = l_malloc(bufsize);
|
|
memset(rtmmsg, 0, bufsize);
|
|
|
|
rtmmsg->ifi_family = AF_UNSPEC;
|
|
rtmmsg->ifi_index = ifindex;
|
|
|
|
rta_buf = rtmmsg + 1;
|
|
|
|
rta_buf += rta_add_u8(rta_buf, IFLA_LINKMODE, linkmode);
|
|
rta_buf += rta_add_u8(rta_buf, IFLA_OPERSTATE, operstate);
|
|
|
|
if (callback) {
|
|
cb_data = l_new(struct cb_data, 1);
|
|
cb_data->callback = callback;
|
|
cb_data->user_data = user_data;
|
|
}
|
|
|
|
l_netlink_send(rtnl, RTM_SETLINK, 0, rtmmsg,
|
|
rta_buf - (void *) rtmmsg,
|
|
netlink_result, cb_data, NULL);
|
|
|
|
l_free(rtmmsg);
|
|
}
|
|
|
|
static void free_netdev_data(void *user_data)
|
|
{
|
|
struct netdev_data *netdev = user_data;
|
|
|
|
l_free(netdev);
|
|
}
|
|
|
|
static void newlink_notify(const struct ifinfomsg *ifi, int bytes)
|
|
{
|
|
struct netdev_data *netdev;
|
|
uint32_t index = ifi->ifi_index;
|
|
struct rtattr *rta;
|
|
|
|
netdev = l_hashmap_lookup(netdev_list, L_UINT_TO_PTR(index));
|
|
if (!netdev) {
|
|
netdev = l_new(struct netdev_data, 1);
|
|
|
|
netdev->index = index;
|
|
|
|
if (!l_hashmap_insert(netdev_list,
|
|
L_UINT_TO_PTR(index), netdev)) {
|
|
free_netdev_data(netdev);
|
|
return;
|
|
}
|
|
}
|
|
|
|
netdev->flags = ifi->ifi_flags;
|
|
|
|
for (rta = IFLA_RTA(ifi); RTA_OK(rta, bytes);
|
|
rta = RTA_NEXT(rta, bytes)) {
|
|
switch (rta->rta_type) {
|
|
case IFLA_IFNAME:
|
|
if (RTA_PAYLOAD(rta) <= IF_NAMESIZE)
|
|
strcpy(netdev->ifname, RTA_DATA(rta));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dellink_notify(const struct ifinfomsg *ifi, int bytes)
|
|
{
|
|
struct netdev_data *netdev;
|
|
uint32_t index = ifi->ifi_index;
|
|
|
|
wiphy_notify_dellink(index);
|
|
|
|
netdev = l_hashmap_remove(netdev_list, L_UINT_TO_PTR(index));
|
|
if (!netdev)
|
|
return;
|
|
|
|
free_netdev_data(netdev);
|
|
}
|
|
|
|
static void link_notify(uint16_t type, const void *data, uint32_t len,
|
|
void *user_data)
|
|
{
|
|
const struct ifinfomsg *ifi = data;
|
|
int bytes;
|
|
|
|
if (ifi->ifi_type != ARPHRD_ETHER)
|
|
return;
|
|
|
|
bytes = len - NLMSG_ALIGN(sizeof(struct ifinfomsg));
|
|
|
|
switch (type) {
|
|
case RTM_NEWLINK:
|
|
newlink_notify(ifi, bytes);
|
|
break;
|
|
case RTM_DELLINK:
|
|
dellink_notify(ifi, bytes);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void netdev_destroy(void)
|
|
{
|
|
/*
|
|
* The netlink object keeps track of the registered notification
|
|
* callbacks and their multicast memberships. When destroying the
|
|
* netlink object, all resources will be freed.
|
|
*/
|
|
l_netlink_destroy(rtnl);
|
|
rtnl = NULL;
|
|
|
|
l_hashmap_destroy(netdev_list, free_netdev_data);
|
|
netdev_list = NULL;
|
|
}
|
|
|
|
bool netdev_init(void)
|
|
{
|
|
if (rtnl)
|
|
return false;
|
|
|
|
l_debug("Opening route netlink socket");
|
|
|
|
rtnl = l_netlink_new(NETLINK_ROUTE);
|
|
if (!rtnl) {
|
|
l_error("Failed to open route netlink socket");
|
|
return false;
|
|
}
|
|
|
|
if (getenv("IWD_RTNL_DEBUG"))
|
|
l_netlink_set_debug(rtnl, do_debug, "[RTNL] ", NULL);
|
|
|
|
netdev_list = l_hashmap_new();
|
|
|
|
if (!l_netlink_register(rtnl, RTNLGRP_LINK, link_notify, NULL, NULL)) {
|
|
l_error("Failed to register link notification");
|
|
goto destroy;
|
|
}
|
|
|
|
return true;
|
|
|
|
destroy:
|
|
netdev_destroy();
|
|
|
|
return false;
|
|
}
|
|
|
|
bool netdev_exit(void)
|
|
{
|
|
if (!rtnl)
|
|
return false;
|
|
|
|
l_debug("Closing route netlink socket");
|
|
|
|
netdev_destroy();
|
|
|
|
return true;
|
|
}
|