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rtnlutil: Introduce rtnl utility 

The rtnl utility will encapsulate a collection of functions for rtnl ops.
This commit is contained in:
Tim Kourt 2019-05-06 11:17:52 -07:00 committed by Denis Kenzior
parent b0ef0a79a8
commit 5104e6752f
3 changed files with 104 additions and 0 deletions
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1
Makefile.am
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@ -204,6 +204,7 @@ src_iwd_SOURCES = src/main.c linux/nl80211.h src/iwd.h src/missing.h \
src/manager.c \
src/erp.h src/erp.c \
src/fils.h src/fils.c \
src/rtnutil.h src/rtnlutil.c \
$(eap_sources) \
$(builtin_sources)
src_iwd_LDADD = $(ell_ldadd) -ldl

76
src/rtnlutil.c Normal file
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@ -0,0 +1,76 @@
/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2019 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 <sys/socket.h>
#include <linux/rtnetlink.h>
#include <ell/ell.h>
#include "src/rtnlutil.h"
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));
}
uint32_t rtnl_set_linkmode_and_operstate(struct l_netlink *rtnl, int ifindex,
uint8_t linkmode, uint8_t operstate,
l_netlink_command_func_t cb,
void *user_data,
l_netlink_destroy_func_t destroy)
{
struct ifinfomsg *rtmmsg;
void *rta_buf;
size_t bufsize;
uint32_t id;
bufsize = NLMSG_ALIGN(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 = (void *) rtmmsg + NLMSG_ALIGN(sizeof(struct ifinfomsg));
rta_buf += rta_add_u8(rta_buf, IFLA_LINKMODE, linkmode);
rta_buf += rta_add_u8(rta_buf, IFLA_OPERSTATE, operstate);
id = l_netlink_send(rtnl, RTM_SETLINK, 0, rtmmsg,
rta_buf - (void *) rtmmsg,
cb, user_data, destroy);
l_free(rtmmsg);
return id;
}

27
src/rtnlutil.h Normal file
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@ -0,0 +1,27 @@
/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2019 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
*
*/
uint32_t rtnl_set_linkmode_and_operstate(struct l_netlink *rtnl, int ifindex,
uint8_t linkmode, uint8_t operstate,
l_netlink_command_func_t cb,
void *user_data,
l_netlink_destroy_func_t destroy);