Date: Thu, 7 Jan 2016 10:20:03 +0000 (UTC) From: "Alexander V. Chernikov" <melifaro@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r293311 - head/sys/netpfil/pf Message-ID: <201601071020.u07AK3L1042054@repo.freebsd.org>
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Author: melifaro Date: Thu Jan 7 10:20:03 2016 New Revision: 293311 URL: https://svnweb.freebsd.org/changeset/base/293311 Log: Convert pf(4) to the new routing API. Differential Revision: https://reviews.freebsd.org/D4763 Modified: head/sys/netpfil/pf/pf.c Modified: head/sys/netpfil/pf/pf.c ============================================================================== --- head/sys/netpfil/pf/pf.c Thu Jan 7 09:40:19 2016 (r293310) +++ head/sys/netpfil/pf/pf.c Thu Jan 7 10:20:03 2016 (r293311) @@ -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, voi 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_fam 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_fam 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 @@ out: 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 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,
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