#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
extern int in_inithead __P((void **head, int off));
#define RTPRF_OURS RTF_PROTO3
static struct radix_node *
in_addroute(void *v_arg, void *n_arg, struct radix_node_head *head,
struct radix_node *treenodes)
{
struct rtentry *rt = (struct rtentry *)treenodes;
struct sockaddr_in *sin = (struct sockaddr_in *)rt_key(rt);
struct radix_node *ret;
if(IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
rt->rt_flags |= RTF_MULTICAST;
if(!(rt->rt_flags & (RTF_HOST | RTF_CLONING | RTF_MULTICAST))) {
rt->rt_flags |= RTF_PRCLONING;
}
if (rt->rt_flags & RTF_HOST) {
if (in_broadcast(sin->sin_addr, rt->rt_ifp)) {
rt->rt_flags |= RTF_BROADCAST;
} else {
#define satosin(sa) ((struct sockaddr_in *)sa)
if (satosin(rt->rt_ifa->ifa_addr)->sin_addr.s_addr
== sin->sin_addr.s_addr)
rt->rt_flags |= RTF_LOCAL;
#undef satosin
}
}
if (!rt->rt_rmx.rmx_mtu && !(rt->rt_rmx.rmx_locks & RTV_MTU)
&& rt->rt_ifp)
rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu;
ret = rn_addroute(v_arg, n_arg, head, treenodes);
if (ret == NULL && rt->rt_flags & RTF_HOST) {
struct rtentry *rt2;
rt2 = rtalloc1((struct sockaddr *)sin, 0,
RTF_CLONING | RTF_PRCLONING);
if (rt2) {
if (rt2->rt_flags & RTF_LLINFO &&
rt2->rt_flags & RTF_HOST &&
rt2->rt_gateway &&
rt2->rt_gateway->sa_family == AF_LINK) {
rtrequest(RTM_DELETE,
(struct sockaddr *)rt_key(rt2),
rt2->rt_gateway,
rt_mask(rt2), rt2->rt_flags, 0);
ret = rn_addroute(v_arg, n_arg, head,
treenodes);
}
RTFREE(rt2);
}
}
return ret;
}
static struct radix_node *
in_matroute(void *v_arg, struct radix_node_head *head)
{
struct radix_node *rn = rn_match(v_arg, head);
struct rtentry *rt = (struct rtentry *)rn;
if(rt && rt->rt_refcnt == 0) {
if(rt->rt_flags & RTPRF_OURS) {
rt->rt_flags &= ~RTPRF_OURS;
rt->rt_rmx.rmx_expire = 0;
}
}
return rn;
}
int rtq_reallyold = 60*60;
SYSCTL_INT(_net_inet_ip, IPCTL_RTEXPIRE, rtexpire,
CTLFLAG_RW, &rtq_reallyold , 0, "");
int rtq_minreallyold = 10;
SYSCTL_INT(_net_inet_ip, IPCTL_RTMINEXPIRE, rtminexpire,
CTLFLAG_RW, &rtq_minreallyold , 0, "");
int rtq_toomany = 128;
SYSCTL_INT(_net_inet_ip, IPCTL_RTMAXCACHE, rtmaxcache,
CTLFLAG_RW, &rtq_toomany , 0, "");
static void
in_clsroute(struct radix_node *rn, struct radix_node_head *head)
{
struct rtentry *rt = (struct rtentry *)rn;
if(!(rt->rt_flags & RTF_UP))
return;
if((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST)
return;
if((rt->rt_flags & (RTF_WASCLONED | RTPRF_OURS))
!= RTF_WASCLONED)
return;
if(rtq_reallyold != 0) {
rt->rt_flags |= RTPRF_OURS;
rt->rt_rmx.rmx_expire = time_second + rtq_reallyold;
} else {
rtrequest(RTM_DELETE,
(struct sockaddr *)rt_key(rt),
rt->rt_gateway, rt_mask(rt),
rt->rt_flags, 0);
}
}
struct rtqk_arg {
struct radix_node_head *rnh;
int draining;
int killed;
int found;
int updating;
time_t nextstop;
};
static int
in_rtqkill(struct radix_node *rn, void *rock)
{
struct rtqk_arg *ap = rock;
struct rtentry *rt = (struct rtentry *)rn;
int err;
if(rt->rt_flags & RTPRF_OURS) {
ap->found++;
if(ap->draining || rt->rt_rmx.rmx_expire <= time_second) {
if(rt->rt_refcnt > 0)
panic("rtqkill route really not free");
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\n", err);
} else {
ap->killed++;
}
} else {
if(ap->updating
&& (rt->rt_rmx.rmx_expire - time_second
> rtq_reallyold)) {
rt->rt_rmx.rmx_expire = time_second
+ rtq_reallyold;
}
ap->nextstop = lmin(ap->nextstop,
rt->rt_rmx.rmx_expire);
}
}
return 0;
}
static void
in_rtqtimo_funnel(void *rock)
{
boolean_t funnel_state;
funnel_state = thread_funnel_set(network_flock, TRUE);
in_rtqtimo(rock);
(void) thread_funnel_set(network_flock, FALSE);
}
#define RTQ_TIMEOUT 60*10
static int rtq_timeout = RTQ_TIMEOUT;
static void
in_rtqtimo(void *rock)
{
struct radix_node_head *rnh = rock;
struct rtqk_arg arg;
struct timeval atv;
static time_t last_adjusted_timeout = 0;
int s;
arg.found = arg.killed = 0;
arg.rnh = rnh;
arg.nextstop = time_second + rtq_timeout;
arg.draining = arg.updating = 0;
s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
splx(s);
if((arg.found - arg.killed > rtq_toomany)
&& (time_second - last_adjusted_timeout >= rtq_timeout)
&& rtq_reallyold > rtq_minreallyold) {
rtq_reallyold = 2*rtq_reallyold / 3;
if(rtq_reallyold < rtq_minreallyold) {
rtq_reallyold = rtq_minreallyold;
}
last_adjusted_timeout = time_second;
#if DIAGNOSTIC
log(LOG_DEBUG, "in_rtqtimo: adjusted rtq_reallyold to %d\n",
rtq_reallyold);
#endif
arg.found = arg.killed = 0;
arg.updating = 1;
s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
splx(s);
}
atv.tv_usec = 0;
atv.tv_sec = arg.nextstop - time_second;
timeout(in_rtqtimo_funnel, rock, tvtohz(&atv));
}
void
in_rtqdrain(void)
{
struct radix_node_head *rnh = rt_tables[AF_INET];
struct rtqk_arg arg;
int s;
arg.found = arg.killed = 0;
arg.rnh = rnh;
arg.nextstop = 0;
arg.draining = 1;
arg.updating = 0;
s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
splx(s);
}
int
in_inithead(void **head, int off)
{
struct radix_node_head *rnh;
if (*head)
return 1;
if(!rn_inithead(head, off))
return 0;
if(head != (void **)&rt_tables[AF_INET])
return 1;
rnh = *head;
rnh->rnh_addaddr = in_addroute;
rnh->rnh_matchaddr = in_matroute;
rnh->rnh_close = in_clsroute;
in_rtqtimo(rnh);
return 1;
}
struct in_ifadown_arg {
struct radix_node_head *rnh;
struct ifaddr *ifa;
};
static int
in_ifadownkill(struct radix_node *rn, void *xap)
{
struct in_ifadown_arg *ap = xap;
struct rtentry *rt = (struct rtentry *)rn;
int err;
if (rt->rt_ifa == ap->ifa && !(rt->rt_flags & RTF_STATIC)) {
rt->rt_flags &= ~RTF_PRCLONING;
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_ifadownkill: error %d\n", err);
}
}
return 0;
}
int
in_ifadown(struct ifaddr *ifa)
{
struct in_ifadown_arg arg;
struct radix_node_head *rnh;
if (ifa->ifa_addr->sa_family != AF_INET)
return 1;
arg.rnh = rnh = rt_tables[AF_INET];
arg.ifa = ifa;
rnh->rnh_walktree(rnh, in_ifadownkill, &arg);
ifa->ifa_flags &= ~IFA_ROUTE;
return 0;
}