147 lines
3.3 KiB
C
147 lines
3.3 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <linux/rtnetlink.h>
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#include <net/if_arp.h>
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#include <net/if.h>
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#include <linux/if_ether.h>
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#include <ell/ell.h>
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#include "src/wiphy.h"
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#include "src/netdev.h"
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static struct l_netlink *rtnl = NULL;
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static void do_debug(const char *str, void *user_data)
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{
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const char *prefix = user_data;
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l_info("%s%s", prefix, str);
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}
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struct cb_data {
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netdev_command_func_t callback;
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void *user_data;
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};
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static void netlink_result(int error, uint16_t type, const void *data,
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uint32_t len, void *user_data)
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{
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struct cb_data *cb_data = user_data;
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if (!cb_data)
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return;
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cb_data->callback(error < 0 ? false : true, cb_data->user_data);
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l_free(cb_data);
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}
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static size_t rta_add_u8(void *rta_buf, unsigned short type, uint8_t value)
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{
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struct rtattr *rta = rta_buf;
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rta->rta_len = RTA_LENGTH(sizeof(uint8_t));
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rta->rta_type = type;
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*((uint8_t *) RTA_DATA(rta)) = value;
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return RTA_SPACE(sizeof(uint8_t));
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}
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void netdev_set_linkmode_and_operstate(uint32_t ifindex,
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uint8_t linkmode, uint8_t operstate,
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netdev_command_func_t callback, void *user_data)
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{
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struct ifinfomsg *rtmmsg;
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void *rta_buf;
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size_t bufsize;
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struct cb_data *cb_data = NULL;
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bufsize = NLMSG_LENGTH(sizeof(struct ifinfomsg)) +
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RTA_SPACE(sizeof(uint8_t)) + RTA_SPACE(sizeof(uint8_t));
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rtmmsg = l_malloc(bufsize);
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memset(rtmmsg, 0, bufsize);
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rtmmsg->ifi_family = AF_UNSPEC;
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rtmmsg->ifi_index = ifindex;
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rta_buf = rtmmsg + 1;
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rta_buf += rta_add_u8(rta_buf, IFLA_LINKMODE, linkmode);
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rta_buf += rta_add_u8(rta_buf, IFLA_OPERSTATE, operstate);
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if (callback) {
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cb_data = l_new(struct cb_data, 1);
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cb_data->callback = callback;
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cb_data->user_data = user_data;
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}
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l_netlink_send(rtnl, RTM_SETLINK, 0, rtmmsg,
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rta_buf - (void *) rtmmsg,
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netlink_result, cb_data, NULL);
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l_free(rtmmsg);
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}
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bool netdev_init(void)
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{
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if (rtnl)
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return false;
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l_debug("Opening route netlink socket");
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rtnl = l_netlink_new(NETLINK_ROUTE);
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if (!rtnl) {
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l_error("Failed to open route netlink socket");
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return false;
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}
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if (getenv("IWD_RTNL_DEBUG"))
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l_netlink_set_debug(rtnl, do_debug, "[RTNL] ", NULL);
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return true;
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}
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bool netdev_exit(void)
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{
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if (!rtnl)
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return false;
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l_debug("Closing route netlink socket");
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/*
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* The netlink object keeps track of the registered notification
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* callbacks and their multicast memberships. When destroying the
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* netlink object, all resources will be freed.
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*/
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l_netlink_destroy(rtnl);
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rtnl = NULL;
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return true;
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}
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