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/* $OpenBSD: rde_rib.c,v 1.5 2007/10/24 20:38:03 claudio Exp $ */
/*
* Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <net/if_types.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <event.h>
#include "ripd.h"
#include "rip.h"
#include "log.h"
#include "rde.h"
extern struct ripd_conf *rdeconf;
RB_HEAD(rt_tree, rt_node) rt;
RB_PROTOTYPE(rt_tree, rt_node, entry, rt_compare)
RB_GENERATE(rt_tree, rt_node, entry, rt_compare)
void route_action_timeout(int, short, void *);
void route_action_garbage(int, short, void *);
/* timers */
int
route_start_timeout(struct rt_node *rn)
{
struct timeval tv;
timerclear(&tv);
tv.tv_sec = ROUTE_TIMEOUT;
return (evtimer_add(&rn->timeout_timer, &tv));
}
void
route_start_garbage(struct rt_node *rn)
{
struct timeval tv;
timerclear(&tv);
tv.tv_sec = ROUTE_GARBAGE;
if (evtimer_pending(&rn->timeout_timer, NULL)) {
if (evtimer_del(&rn->timeout_timer) == -1)
fatal("route_start_garbage");
evtimer_add(&rn->garbage_timer, &tv);
}
}
/* ARGSUSED */
void
route_action_timeout(int fd, short event, void *arg)
{
struct rt_node *r = arg;
struct timeval tv;
timerclear(&tv);
r->metric = INFINITY;
tv.tv_sec = ROUTE_GARBAGE;
if (evtimer_add(&r->garbage_timer, &tv) == -1)
fatal("route_action_timeout");
rde_send_change_kroute(r);
}
/* ARGSUSED */
void
route_action_garbage(int fd, short event, void *arg)
{
struct rt_node *r = arg;
rde_send_delete_kroute(r);
rt_remove(r);
}
void
route_reset_timers(struct rt_node *r)
{
struct timeval tv;
timerclear(&tv);
tv.tv_sec = ROUTE_TIMEOUT;
evtimer_del(&r->timeout_timer);
evtimer_del(&r->garbage_timer);
evtimer_add(&r->timeout_timer, &tv);
}
/* route table */
void
rt_init(void)
{
RB_INIT(&rt);
}
int
rt_compare(struct rt_node *a, struct rt_node *b)
{
if (ntohl(a->prefix.s_addr) < ntohl(b->prefix.s_addr))
return (-1);
if (ntohl(a->prefix.s_addr) > ntohl(b->prefix.s_addr))
return (1);
if (ntohl(a->netmask.s_addr) < ntohl(b->netmask.s_addr))
return (-1);
if (ntohl(a->netmask.s_addr) > ntohl(b->netmask.s_addr))
return (1);
return (0);
}
struct rt_node *
rt_find(in_addr_t prefix, in_addr_t netmask)
{
struct rt_node s;
s.prefix.s_addr = prefix;
s.netmask.s_addr = netmask;
return (RB_FIND(rt_tree, &rt, &s));
}
struct rt_node *
rt_new_kr(struct kroute *kr)
{
struct rt_node *rn;
if ((rn = calloc(1, sizeof(*rn))) == NULL)
fatal("rt_new_kr");
evtimer_set(&rn->timeout_timer, route_action_timeout, rn);
evtimer_set(&rn->garbage_timer, route_action_garbage, rn);
rn->prefix.s_addr = kr->prefix.s_addr;
rn->netmask.s_addr = kr->netmask.s_addr;
rn->nexthop.s_addr = kr->nexthop.s_addr;
rn->metric = kr->metric;
rn->ifindex = kr->ifindex;
rn->flags = F_KERNEL;
return (rn);
}
struct rt_node *
rt_new_rr(struct rip_route *e, u_int8_t metric)
{
struct rt_node *rn;
if ((rn = calloc(1, sizeof(*rn))) == NULL)
fatal("rt_new_rr");
evtimer_set(&rn->timeout_timer, route_action_timeout, rn);
evtimer_set(&rn->garbage_timer, route_action_garbage, rn);
rn->prefix.s_addr = e->address.s_addr;
rn->netmask.s_addr = e->mask.s_addr;
rn->nexthop.s_addr = e->nexthop.s_addr;
rn->metric = metric;
rn->ifindex = e->ifindex;
rn->flags = F_RIPD_INSERTED;
return (rn);
}
int
rt_insert(struct rt_node *r)
{
if (RB_INSERT(rt_tree, &rt, r) != NULL) {
log_warnx("rt_insert failed for %s/%u",
inet_ntoa(r->prefix), mask2prefixlen(r->netmask.s_addr));
free(r);
return (-1);
}
return (0);
}
int
rt_remove(struct rt_node *r)
{
if (RB_REMOVE(rt_tree, &rt, r) == NULL) {
log_warnx("rt_remove failed for %s/%u",
inet_ntoa(r->prefix), mask2prefixlen(r->netmask.s_addr));
return (-1);
}
free(r);
return (0);
}
void
rt_snap(u_int32_t peerid)
{
struct rt_node *r;
struct rip_route rr;
bzero(&rr, sizeof(rr));
RB_FOREACH(r, rt_tree, &rt) {
rr.address = r->prefix;
rr.mask = r->netmask;
rr.nexthop = r->nexthop;
rr.metric = r->metric;
rr.ifindex = r->ifindex;
rde_imsg_compose_ripe(IMSG_RESPONSE_ADD, peerid, 0, &rr,
sizeof(rr));
}
}
void
rt_dump(pid_t pid)
{
struct rt_node *r;
static struct ctl_rt rtctl;
RB_FOREACH(r, rt_tree, &rt) {
rtctl.prefix.s_addr = r->prefix.s_addr;
rtctl.netmask.s_addr = r->netmask.s_addr;
rtctl.nexthop.s_addr = r->nexthop.s_addr;
rtctl.metric = r->metric;
rtctl.flags = r->flags;
rde_imsg_compose_ripe(IMSG_CTL_SHOW_RIB, 0, pid, &rtctl,
sizeof(rtctl));
}
}
void
rt_complete(struct rip_route *rr)
{
struct rt_node *rn;
if ((rn = rt_find(rr->address.s_addr, rr->mask.s_addr)) == NULL)
rr->metric = INFINITY;
else
rr->metric = rn->metric;
}
void
rt_clear(void)
{
struct rt_node *r;
while ((r = RB_MIN(rt_tree, &rt)) != NULL)
rt_remove(r);
}
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