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/*
* This file is a part of plotnetcfg, a tool to visualize network config.
* Copyright (C) 2014 Red Hat, Inc. -- Jiri Benc <jbenc@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*/
#define _GNU_SOURCE
#include <stdint.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include "../handler.h"
#include "../netlink.h"
#include "vlan.h"
static int vlan_netlink(struct if_entry *entry, struct rtattr **tb);
static struct handler h_vlan = {
.driver = "802.1Q VLAN Support",
.netlink = vlan_netlink,
.cleanup = handler_generic_cleanup,
};
struct vlan_private {
unsigned int tag;
};
void handler_vlan_register(void)
{
handler_register(&h_vlan);
}
static int vlan_netlink(struct if_entry *entry, struct rtattr **tb)
{
struct vlan_private *priv;
struct rtattr *linkinfo[IFLA_INFO_MAX + 1];
struct rtattr *vlanattr[IFLA_VLAN_MAX + 1];
priv = calloc(sizeof(*priv), 1);
if (!priv)
return ENOMEM;
entry->handler_private = priv;
if (!tb[IFLA_LINKINFO])
return ENOENT;
rtnl_parse_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
if (!linkinfo[IFLA_INFO_DATA])
return ENOENT;
rtnl_parse_nested(vlanattr, IFLA_VLAN_MAX, linkinfo[IFLA_INFO_DATA]);
if (!vlanattr[IFLA_VLAN_ID] ||
RTA_PAYLOAD(vlanattr[IFLA_VLAN_ID]) < sizeof(__u16))
return ENOENT;
priv->tag = *(uint16_t *)RTA_DATA(vlanattr[IFLA_VLAN_ID]);
if (asprintf(&entry->edge_label, "tag %d", priv->tag) < 0)
return ENOMEM;
return 0;
}
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