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/*
* $Id: libbridge_init.c,v 1.1.1.4 2003/10/14 08:09:37 sparq Exp $
*
* Copyright (C) 2000 Lennert Buytenhek
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include "libbridge.h"
#include "libbridge_private.h"
int br_socket_fd;
struct bridge *bridge_list;
static void __bridge_info_copy(struct bridge_info *info, struct __bridge_info *i)
{
memcpy(&info->designated_root, &i->designated_root, 8);
memcpy(&info->bridge_id, &i->bridge_id, 8);
info->root_path_cost = i->root_path_cost;
info->topology_change = i->topology_change;
info->topology_change_detected = i->topology_change_detected;
info->root_port = i->root_port;
info->stp_enabled = i->stp_enabled;
__jiffies_to_tv(&info->max_age, i->max_age);
__jiffies_to_tv(&info->hello_time, i->hello_time);
__jiffies_to_tv(&info->forward_delay, i->forward_delay);
__jiffies_to_tv(&info->bridge_max_age, i->bridge_max_age);
__jiffies_to_tv(&info->bridge_hello_time, i->bridge_hello_time);
__jiffies_to_tv(&info->bridge_forward_delay, i->bridge_forward_delay);
__jiffies_to_tv(&info->ageing_time, i->ageing_time);
__jiffies_to_tv(&info->gc_interval, i->gc_interval);
__jiffies_to_tv(&info->hello_timer_value, i->hello_timer_value);
__jiffies_to_tv(&info->tcn_timer_value, i->tcn_timer_value);
__jiffies_to_tv(&info->topology_change_timer_value,
i->topology_change_timer_value);
__jiffies_to_tv(&info->gc_timer_value, i->gc_timer_value);
}
static void __port_info_copy(struct port_info *info, struct __port_info *i)
{
memcpy(&info->designated_root, &i->designated_root, 8);
memcpy(&info->designated_bridge, &i->designated_bridge, 8);
info->port_id = i->port_id;
info->designated_port = i->designated_port;
info->path_cost = i->path_cost;
info->designated_cost = i->designated_cost;
info->state = i->state;
info->top_change_ack = i->top_change_ack;
info->config_pending = i->config_pending;
__jiffies_to_tv(&info->message_age_timer_value,
i->message_age_timer_value);
__jiffies_to_tv(&info->forward_delay_timer_value,
i->forward_delay_timer_value);
__jiffies_to_tv(&info->hold_timer_value,
i->hold_timer_value);
}
int br_read_info(struct bridge *br)
{
struct __bridge_info i;
if (if_indextoname(br->ifindex, br->ifname) == NULL)
return 1;
if (br_device_ioctl(br, BRCTL_GET_BRIDGE_INFO,
(unsigned long)&i, 0, 0) < 0)
return 1;
__bridge_info_copy(&br->info, &i);
return 0;
}
int br_read_port_info(struct port *p)
{
struct __port_info i;
if (br_device_ioctl(p->parent, BRCTL_GET_PORT_INFO,
(unsigned long)&i, p->index, 0) < 0)
return errno;
__port_info_copy(&p->info, &i);
return 0;
}
void br_nuke_bridge(struct bridge *b)
{
struct port *p;
p = b->firstport;
while (p != NULL) {
struct port *pnext;
pnext = p->next;
free(p);
p = pnext;
}
free(b);
}
int br_make_port_list(struct bridge *br)
{
int err;
int i;
int ifindices[256];
if (br_device_ioctl(br, BRCTL_GET_PORT_LIST, (unsigned long)ifindices,
0, 0) < 0)
return errno;
for (i=255;i>=0;i--) {
struct port *p;
if (!ifindices[i])
continue;
p = malloc(sizeof(struct port));
p->index = i;
p->ifindex = ifindices[i];
p->parent = br;
br->ports[i] = p;
p->next = br->firstport;
br->firstport = p;
if ((err = br_read_port_info(p)) != 0)
goto error_out;
}
return 0;
error_out:
while (++i < 256)
free(br->ports[i]);
return err;
}
int br_make_bridge_list()
{
int err;
int i;
int ifindices[32];
int num;
num = br_ioctl(BRCTL_GET_BRIDGES, (unsigned long)ifindices, 32);
if (num < 0)
return errno;
bridge_list = NULL;
for (i=0;i<num;i++) {
struct bridge *br;
br = malloc(sizeof(struct bridge));
memset(br, 0, sizeof(struct bridge));
br->ifindex = ifindices[i];
br->firstport = NULL;
br->next = bridge_list;
bridge_list = br;
if ((err = br_read_info(br)) != 0)
goto error_out;
if ((err = br_make_port_list(br)) != 0)
goto error_out;
}
return 0;
error_out:
while (bridge_list != NULL) {
struct bridge *nxt;
nxt = bridge_list->next;
br_nuke_bridge(bridge_list);
bridge_list = nxt;
}
return err;
}
int br_init()
{
int err;
if ((br_socket_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
return errno;
if (br_get_version() != BRCTL_VERSION)
return 12345;
if ((err = br_make_bridge_list()) != 0)
return err;
return 0;
}
int br_refresh()
{
struct bridge *b;
b = bridge_list;
while (b != NULL) {
struct bridge *bnext;
bnext = b->next;
br_nuke_bridge(b);
b = bnext;
}
return br_make_bridge_list();
}
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