#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <kern/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#if defined(__APPLE__)
#include <netinet/ip_var.h>
#endif
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#if !defined(__APPLE__)
#include <netinet6/tcp6.h>
#include <netinet6/tcp6_seq.h>
#include <netinet6/tcp6_timer.h>
#include <netinet6/tcp6_var.h>
#else
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#endif
#if !defined(__APPLE__)
#define tcp_sendspace tcp6_sendspace
#define tcp_recvspace tcp6_recvspace
#define time_second time.tv_sec
#define tvtohz hzto
#endif
extern int in6_inithead __P((void **head, int off));
#define RTPRF_OURS RTF_PROTO3
static struct radix_node *
in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head,
struct radix_node *treenodes)
{
struct rtentry *rt = (struct rtentry *)treenodes;
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt);
struct radix_node *ret;
if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_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 (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr)
->sin6_addr,
&sin6->sin6_addr)) {
rt->rt_flags |= RTF_LOCAL;
}
}
if (!rt->rt_rmx.rmx_sendpipe && !(rt->rt_rmx.rmx_locks & RTV_SPIPE))
rt->rt_rmx.rmx_sendpipe = tcp_sendspace;
if (!rt->rt_rmx.rmx_recvpipe && !(rt->rt_rmx.rmx_locks & RTV_RPIPE))
rt->rt_rmx.rmx_recvpipe = tcp_recvspace;
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 *)sin6, 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);
}
} else if (ret == NULL && rt->rt_flags & RTF_CLONING) {
struct rtentry *rt2;
rt2 = rtalloc1((struct sockaddr *)sin6, 0,
RTF_CLONING | RTF_PRCLONING);
if (rt2) {
if ((rt2->rt_flags & (RTF_CLONING|RTF_HOST|RTF_GATEWAY))
== RTF_CLONING
&& rt2->rt_gateway
&& rt2->rt_gateway->sa_family == AF_LINK
&& rt2->rt_ifp == rt->rt_ifp) {
ret = rt2->rt_nodes;
}
RTFREE(rt2);
}
}
return ret;
}
static struct radix_node *
in6_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;
}
static int rtq_reallyold = 60*60;
static int rtq_minreallyold = 10;
static int rtq_toomany = 128;
static void
in6_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 mode;
int updating;
int draining;
int killed;
int found;
time_t nextstop;
};
static int
in6_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, "in6_rtqkill: error %d", 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;
}
#define RTQ_TIMEOUT 60*10
static int rtq_timeout = RTQ_TIMEOUT;
static void
in6_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;
#ifdef __APPLE__
boolean_t funnel_state;
funnel_state = thread_set_funneled(TRUE);
#endif
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, in6_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, "in6_rtqtimo: adjusted rtq_reallyold to %d",
rtq_reallyold);
#endif
arg.found = arg.killed = 0;
arg.updating = 1;
s = splnet();
rnh->rnh_walktree(rnh, in6_rtqkill, &arg);
splx(s);
}
atv.tv_usec = 0;
atv.tv_sec = arg.nextstop;
timeout(in6_rtqtimo, rock, tvtohz(&atv));
#ifdef __APPLE__
(void) thread_set_funneled(funnel_state);
#endif
}
struct mtuex_arg {
struct radix_node_head *rnh;
time_t nextstop;
};
static int
in6_mtuexpire(struct radix_node *rn, void *rock)
{
struct rtentry *rt = (struct rtentry *)rn;
struct mtuex_arg *ap = rock;
if (!rt)
panic("rt == NULL in in6_mtuexpire");
if (rt->rt_rmx.rmx_expire && !(rt->rt_flags & RTF_PROBEMTU)) {
if (rt->rt_rmx.rmx_expire <= time_second) {
rt->rt_flags |= RTF_PROBEMTU;
} else {
ap->nextstop = lmin(ap->nextstop,
rt->rt_rmx.rmx_expire);
}
}
return 0;
}
#define MTUTIMO_DEFAULT (60*1)
static void
in6_mtutimo(void *rock)
{
struct radix_node_head *rnh = rock;
struct mtuex_arg arg;
struct timeval atv;
int s;
#ifdef __APPLE__
boolean_t funnel_state;
funnel_state = thread_set_funneled(TRUE);
#endif
arg.rnh = rnh;
arg.nextstop = time_second + MTUTIMO_DEFAULT;
s = splnet();
rnh->rnh_walktree(rnh, in6_mtuexpire, &arg);
splx(s);
atv.tv_usec = 0;
atv.tv_sec = arg.nextstop;
if (atv.tv_sec < time_second) {
printf("invalid mtu expiration time on routing table\n");
arg.nextstop = time_second + 30;
}
timeout(in6_mtutimo, rock, tvtohz(&atv));
#ifdef __APPLE__
(void) thread_set_funneled(funnel_state);
#endif
}
#if 0
void
in6_rtqdrain()
{
struct radix_node_head *rnh = rt_tables[AF_INET6];
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, in6_rtqkill, &arg);
splx(s);
}
#endif
int
in6_inithead(void **head, int off)
{
struct radix_node_head *rnh;
if (!rn_inithead(head, off))
return 0;
if (head != (void **)&rt_tables[AF_INET6])
return 1;
rnh = *head;
rnh->rnh_addaddr = in6_addroute;
rnh->rnh_matchaddr = in6_matroute;
rnh->rnh_close = in6_clsroute;
in6_rtqtimo(rnh);
in6_mtutimo(rnh);
return 1;
}