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Convert pf(4) to the new routing API.

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Differential Revision:	https://reviews.freebsd.org/D4763
This commit is contained in:
Alexander V. Chernikov 2016-01-07 10:20:03 +00:00
parent b9320e2a6a
commit 460a5b502f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=293311
1 changed files with 89 additions and 42 deletions
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131
sys/netpfil/pf/pf.c
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@ -73,6 +73,7 @@ __FBSDID("$FreeBSD$");
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/in_fib.h>
#include <netinet/ip.h>
#include <netinet/ip_fw.h>
#include <netinet/ip_icmp.h>
@ -94,6 +95,8 @@ __FBSDID("$FreeBSD$");
#include <netinet6/nd6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/in6_fib.h>
#include <netinet6/scope6_var.h>
#endif /* INET6 */
#include <machine/in_cksum.h>
@ -2985,49 +2988,35 @@ static u_int16_t
pf_calc_mss(struct pf_addr *addr, sa_family_t af, int rtableid, u_int16_t offer)
{
#ifdef INET
struct sockaddr_in *dst;
struct route ro;
struct nhop4_basic nh4;
#endif /* INET */
#ifdef INET6
struct sockaddr_in6 *dst6;
struct route_in6 ro6;
struct nhop6_basic nh6;
struct in6_addr dst6;
uint32_t scopeid;
#endif /* INET6 */
struct rtentry *rt = NULL;
int hlen = 0;
u_int16_t mss = V_tcp_mssdflt;
uint16_t mss = 0;
switch (af) {
#ifdef INET
case AF_INET:
hlen = sizeof(struct ip);
bzero(&ro, sizeof(ro));
dst = (struct sockaddr_in *)&ro.ro_dst;
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
dst->sin_addr = addr->v4;
in_rtalloc_ign(&ro, 0, rtableid);
rt = ro.ro_rt;
if (fib4_lookup_nh_basic(rtableid, addr->v4, 0, 0, &nh4) == 0)
mss = nh4.nh_mtu - hlen - sizeof(struct tcphdr);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
hlen = sizeof(struct ip6_hdr);
bzero(&ro6, sizeof(ro6));
dst6 = (struct sockaddr_in6 *)&ro6.ro_dst;
dst6->sin6_family = AF_INET6;
dst6->sin6_len = sizeof(*dst6);
dst6->sin6_addr = addr->v6;
in6_rtalloc_ign(&ro6, 0, rtableid);
rt = ro6.ro_rt;
in6_splitscope(&addr->v6, &dst6, &scopeid);
if (fib6_lookup_nh_basic(rtableid, &dst6, scopeid, 0,0,&nh6)==0)
mss = nh6.nh_mtu - hlen - sizeof(struct tcphdr);
break;
#endif /* INET6 */
}
if (rt && rt->rt_ifp) {
mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr);
mss = max(V_tcp_mssdflt, mss);
RTFREE(rt);
}
mss = max(V_tcp_mssdflt, mss);
mss = min(mss, offer);
mss = max(mss, 64); /* sanity - at least max opt space */
return (mss);
@ -5194,13 +5183,12 @@ pf_pull_hdr(struct mbuf *m, int off, void *p, int len,
return (p);
}
int
pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif,
#ifdef RADIX_MPATH
static int
pf_routable_oldmpath(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif,
int rtableid)
{
#ifdef RADIX_MPATH
struct radix_node_head *rnh;
#endif
struct sockaddr_in *dst;
int ret = 1;
int check_mpath;
@ -5215,12 +5203,10 @@ pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif,
struct ifnet *ifp;
check_mpath = 0;
#ifdef RADIX_MPATH
/* XXX: stick to table 0 for now */
rnh = rt_tables_get_rnh(0, af);
if (rnh != NULL && rn_mpath_capable(rnh))
check_mpath = 1;
#endif
bzero(&ro, sizeof(ro));
switch (af) {
case AF_INET:
@ -5283,9 +5269,7 @@ pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif,
if (kif->pfik_ifp == ifp)
ret = 1;
#ifdef RADIX_MPATH
rn = rn_mpath_next(rn);
#endif
} while (check_mpath == 1 && rn != NULL && ret == 0);
} else
ret = 0;
@ -5294,6 +5278,72 @@ pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif,
RTFREE(ro.ro_rt);
return (ret);
}
#endif
int
pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif,
int rtableid)
{
#ifdef INET
struct nhop4_basic nh4;
#endif
#ifdef INET6
struct nhop6_basic nh6;
#endif
struct ifnet *ifp;
#ifdef RADIX_MPATH
struct radix_node_head *rnh;
/* XXX: stick to table 0 for now */
rnh = rt_tables_get_rnh(0, af);
if (rnh != NULL && rn_mpath_capable(rnh))
return (pf_routable_oldmpath(addr, af, kif, rtableid));
#endif
/*
* Skip check for addresses with embedded interface scope,
* as they would always match anyway.
*/
if (af == AF_INET6 && IN6_IS_SCOPE_EMBED(&addr->v6))
return (1);
if (af != AF_INET && af != AF_INET6)
return (0);
/* Skip checks for ipsec interfaces */
if (kif != NULL && kif->pfik_ifp->if_type == IFT_ENC)
return (1);
ifp = NULL;
switch (af) {
#ifdef INET6
case AF_INET6:
if (fib6_lookup_nh_basic(rtableid, &addr->v6, 0, 0, 0, &nh6)!=0)
return (0);
ifp = nh6.nh_ifp;
break;
#endif
#ifdef INET
case AF_INET:
if (fib4_lookup_nh_basic(rtableid, addr->v4, 0, 0, &nh4) != 0)
return (0);
ifp = nh4.nh_ifp;
break;
#endif
}
/* No interface given, this is a no-route check */
if (kif == NULL)
return (1);
if (kif->pfik_ifp == NULL)
return (0);
/* Perform uRPF check if passed input interface */
if (kif->pfik_ifp == ifp)
return (1);
return (0);
}
#ifdef INET
static void
@ -5344,23 +5394,20 @@ pf_route(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp,
dst.sin_addr = ip->ip_dst;
if (r->rt == PF_FASTROUTE) {
struct rtentry *rt;
struct nhop4_basic nh4;
if (s)
PF_STATE_UNLOCK(s);
rt = rtalloc1_fib(sintosa(&dst), 0, 0, M_GETFIB(m0));
if (rt == NULL) {
if (fib4_lookup_nh_basic(M_GETFIB(m0), ip->ip_dst, 0,
m0->m_pkthdr.flowid, &nh4) != 0) {
KMOD_IPSTAT_INC(ips_noroute);
error = EHOSTUNREACH;
goto bad;
}
ifp = rt->rt_ifp;
counter_u64_add(rt->rt_pksent, 1);
if (rt->rt_flags & RTF_GATEWAY)
bcopy(satosin(rt->rt_gateway), &dst, sizeof(dst));
RTFREE_LOCKED(rt);
ifp = nh4.nh_ifp;
dst.sin_addr = nh4.nh_addr;
} else {
if (TAILQ_EMPTY(&r->rpool.list)) {
DPFPRINTF(PF_DEBUG_URGENT,