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Add latest version of ``advanced route metric management'' :-)

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As before, this is currently conditionalized on options IN_RMX until
I'm sure it's working.
This commit is contained in:
Garrett Wollman 1994-12-01 23:19:48 +00:00
parent 40569757cc
commit fa1f0e90fb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=4893
1 changed files with 71 additions and 18 deletions
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89
sys/netinet/in_rmx.c
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@ -4,7 +4,7 @@
* You may copy this file verbatim until I find the official
* Institute boilerplate.
*
* $Id: in_rmx.c,v 1.1 1994/11/02 04:42:14 wollman Exp $
* $Id: in_rmx.c,v 1.2 1994/11/03 01:05:34 wollman Exp $
*/
/*
@ -39,6 +39,7 @@
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
@ -87,7 +88,12 @@ in_matroute(void *v_arg, struct radix_node_head *head)
return rn;
}
#if 0
#define RTQ_REALLYOLD 4*60*60 /* four hours is ``really old'' */
#else
#define RTQ_REALLYOLD 120 /* for testing, make these fire faster */
#endif
int rtq_reallyold = RTQ_REALLYOLD;
/*
* On last reference drop, add the route to the queue so that it can be
@ -107,34 +113,81 @@ in_clsroute(struct radix_node *rn, struct radix_node_head *head)
return;
rt->rt_prflags |= RTPRF_OURS;
rt->rt_rmx.rmx_expire = time.tv_sec + RTQ_REALLYOLD;
rt->rt_rmx.rmx_expire = time.tv_sec + rtq_reallyold;
}
/*
* Get rid of everything in the queue, we are short on memory.
* Although this looks like an infinite loop, it really isn't;
* rtrequest() eventually calls in_delroute() which ends up deleting
* the node at the head (or so we hope). This should be called from
* ip_drain().
*/
void
in_rtqdrain(void)
{
/* write me! */
;
}
#define RTQ_TIMEOUT 60 /* run once a minute */
int rtq_timeout = RTQ_TIMEOUT;
#define RTQ_TIMEOUT (60*hz) /* run once a minute */
struct rtqk_arg {
struct radix_node_head *rnh;
int killed;
int found;
time_t nextstop;
};
/*
* Get rid of old routes.
*/
static int
in_rtqkill(struct radix_node *rn, void *rock)
{
struct rtqk_arg *ap = rock;
struct radix_node_head *rnh = ap->rnh;
struct rtentry *rt = (struct rtentry *)rn;
int err;
if(rt->rt_prflags & RTPRF_OURS) {
ap->found++;
if(rt->rt_rmx.rmx_expire <= time.tv_sec) {
if(rt->rt_refcnt > 0)
panic("rtqkill route really not free\n");
err = rtrequest(RTM_DELETE,
(struct sockaddr *)rt_key(rt),
rt->rt_gateway, rt_mask(rt),
rt->rt_flags, 0);
if(err) {
log(LOG_WARNING, "in_rtqkill: error %d", err);
} else {
ap->killed++;
}
} else {
ap->nextstop = lmin(ap->nextstop,
rt->rt_rmx.rmx_expire);
}
}
return 0;
}
static void
in_rtqtimo(void *rock)
{
/* write me! */
struct radix_node_head *rnh = rock;
struct rtqk_arg arg;
static int level;
struct timeval atv;
timeout(in_rtqtimo, rock, RTQ_TIMEOUT);
level++;
arg.found = arg.killed = 0;
arg.rnh = rnh;
arg.nextstop = time.tv_sec + 10*rtq_timeout;
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
printf("in_rtqtimo: found %d, killed %d, level %d\n", arg.found,
arg.killed, level);
atv.tv_usec = 0;
atv.tv_sec = arg.nextstop;
printf("next timeout in %d seconds\n", arg.nextstop - time.tv_sec);
timeout(in_rtqtimo, rock, hzto(&atv));
level--;
}
void
in_rtqdrain(void)
{
;
}
/*