int testTls() { //use tls begin holdExeMem[0] = 0xFF; MessageBoxA(0, 0, 0, 0); typedef int(*PF_test)(LPVOID); PF_test pf_test = 0; HINSTANCE hMod = LoadLibraryA("patchframe.dll"); pf_test = (PF_test)::GetProcAddress(hMod, "test"); pf_test(g_pMemEXE); return 0; //use tls end }
int _tmain(int argc, _TCHAR* argv[]) { int main_f(); return main_f(); //-------- holdExeMem[0] = 0xFF; MessageBoxA(0, 0, 0, 0); typedef int(*PF_test)(LPVOID); PF_test pf_test = 0; HINSTANCE hMod = LoadLibraryA("patchframe.dll"); pf_test = (PF_test)::GetProcAddress(hMod, "test"); pf_test(g_pMemEXE); return 0; }
void ip6_forward(struct mbuf *m, int srcrt) { struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); struct sockaddr_in6 *dst; struct rtentry *rt; int error = 0, type = 0, code = 0; struct mbuf *mcopy = NULL; struct ifnet *origifp; /* maybe unnecessary */ #ifdef IPSEC u_int8_t sproto = 0; struct m_tag *mtag; union sockaddr_union sdst; struct tdb_ident *tdbi; u_int32_t sspi; struct tdb *tdb; #if NPF > 0 struct ifnet *encif; #endif #endif /* IPSEC */ u_int rtableid = 0; char src6[INET6_ADDRSTRLEN], dst6[INET6_ADDRSTRLEN]; /* * Do not forward packets to multicast destination (should be handled * by ip6_mforward(). * Do not forward packets with unspecified source. It was discussed * in July 2000, on ipngwg mailing list. */ if ((m->m_flags & (M_BCAST|M_MCAST)) != 0 || IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) || IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { ip6stat.ip6s_cantforward++; /* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard) */ if (ip6_log_time + ip6_log_interval < time_second) { ip6_log_time = time_second; inet_ntop(AF_INET6, &ip6->ip6_src, src6, sizeof(src6)); inet_ntop(AF_INET6, &ip6->ip6_dst, dst6, sizeof(dst6)); log(LOG_DEBUG, "cannot forward " "from %s to %s nxt %d received on %s\n", src6, dst6, ip6->ip6_nxt, m->m_pkthdr.rcvif->if_xname); } m_freem(m); return; } if (ip6->ip6_hlim <= IPV6_HLIMDEC) { /* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard) */ icmp6_error(m, ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT, 0); return; } ip6->ip6_hlim -= IPV6_HLIMDEC; /* * Save at most ICMPV6_PLD_MAXLEN (= the min IPv6 MTU - * size of IPv6 + ICMPv6 headers) bytes of the packet in case * we need to generate an ICMP6 message to the src. * Thanks to M_EXT, in most cases copy will not occur. * * It is important to save it before IPsec processing as IPsec * processing may modify the mbuf. */ mcopy = m_copy(m, 0, imin(m->m_pkthdr.len, ICMPV6_PLD_MAXLEN)); #if NPF > 0 reroute: #endif #ifdef IPSEC if (!ipsec_in_use) goto done_spd; /* * Check if there was an outgoing SA bound to the flow * from a transport protocol. */ /* Do we have any pending SAs to apply ? */ mtag = m_tag_find(m, PACKET_TAG_IPSEC_PENDING_TDB, NULL); if (mtag != NULL) { #ifdef DIAGNOSTIC if (mtag->m_tag_len != sizeof (struct tdb_ident)) panic("ip6_forward: tag of length %hu (should be %zu", mtag->m_tag_len, sizeof (struct tdb_ident)); #endif tdbi = (struct tdb_ident *)(mtag + 1); tdb = gettdb(tdbi->rdomain, tdbi->spi, &tdbi->dst, tdbi->proto); if (tdb == NULL) error = -EINVAL; m_tag_delete(m, mtag); } else tdb = ipsp_spd_lookup(m, AF_INET6, sizeof(struct ip6_hdr), &error, IPSP_DIRECTION_OUT, NULL, NULL, 0); if (tdb == NULL) { if (error == 0) { /* * No IPsec processing required, we'll just send the * packet out. */ sproto = 0; /* Fall through to routing/multicast handling */ } else { /* * -EINVAL is used to indicate that the packet should * be silently dropped, typically because we've asked * key management for an SA. */ if (error == -EINVAL) /* Should silently drop packet */ error = 0; goto freecopy; } } else { /* Loop detection */ for (mtag = m_tag_first(m); mtag != NULL; mtag = m_tag_next(m, mtag)) { if (mtag->m_tag_id != PACKET_TAG_IPSEC_OUT_DONE && mtag->m_tag_id != PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED) continue; tdbi = (struct tdb_ident *)(mtag + 1); if (tdbi->spi == tdb->tdb_spi && tdbi->proto == tdb->tdb_sproto && tdbi->rdomain == tdb->tdb_rdomain && !bcmp(&tdbi->dst, &tdb->tdb_dst, sizeof(union sockaddr_union))) { sproto = 0; /* mark as no-IPsec-needed */ goto done_spd; } } /* We need to do IPsec */ bcopy(&tdb->tdb_dst, &sdst, sizeof(sdst)); sspi = tdb->tdb_spi; sproto = tdb->tdb_sproto; } /* Fall through to the routing/multicast handling code */ done_spd: #endif /* IPSEC */ #if NPF > 0 rtableid = m->m_pkthdr.rdomain; #endif dst = &ip6_forward_rt.ro_dst; if (!srcrt) { /* * ip6_forward_rt.ro_dst.sin6_addr is equal to ip6->ip6_dst */ if (ip6_forward_rt.ro_rt == 0 || (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) == 0 || ip6_forward_rt.ro_tableid != rtableid) { if (ip6_forward_rt.ro_rt) { RTFREE(ip6_forward_rt.ro_rt); ip6_forward_rt.ro_rt = 0; } /* this probably fails but give it a try again */ ip6_forward_rt.ro_tableid = rtableid; rtalloc_mpath((struct route *)&ip6_forward_rt, &ip6->ip6_src.s6_addr32[0]); } if (ip6_forward_rt.ro_rt == 0) { ip6stat.ip6s_noroute++; /* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_noroute) */ if (mcopy) { icmp6_error(mcopy, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE, 0); } m_freem(m); return; } } else if (ip6_forward_rt.ro_rt == 0 || (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) == 0 || !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &dst->sin6_addr) || ip6_forward_rt.ro_tableid != rtableid) { if (ip6_forward_rt.ro_rt) { RTFREE(ip6_forward_rt.ro_rt); ip6_forward_rt.ro_rt = 0; } bzero(dst, sizeof(*dst)); dst->sin6_len = sizeof(struct sockaddr_in6); dst->sin6_family = AF_INET6; dst->sin6_addr = ip6->ip6_dst; ip6_forward_rt.ro_tableid = rtableid; rtalloc_mpath((struct route *)&ip6_forward_rt, &ip6->ip6_src.s6_addr32[0]); if (ip6_forward_rt.ro_rt == 0) { ip6stat.ip6s_noroute++; /* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_noroute) */ if (mcopy) { icmp6_error(mcopy, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE, 0); } m_freem(m); return; } } rt = ip6_forward_rt.ro_rt; /* * Scope check: if a packet can't be delivered to its destination * for the reason that the destination is beyond the scope of the * source address, discard the packet and return an icmp6 destination * unreachable error with Code 2 (beyond scope of source address). * [draft-ietf-ipngwg-icmp-v3-00.txt, Section 3.1] */ if (in6_addr2scopeid(m->m_pkthdr.rcvif, &ip6->ip6_src) != in6_addr2scopeid(rt->rt_ifp, &ip6->ip6_src)) { ip6stat.ip6s_cantforward++; ip6stat.ip6s_badscope++; in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard); if (ip6_log_time + ip6_log_interval < time_second) { ip6_log_time = time_second; inet_ntop(AF_INET6, &ip6->ip6_src, src6, sizeof(src6)); inet_ntop(AF_INET6, &ip6->ip6_dst, dst6, sizeof(dst6)); log(LOG_DEBUG, "cannot forward " "src %s, dst %s, nxt %d, rcvif %s, outif %s\n", src6, dst6, ip6->ip6_nxt, m->m_pkthdr.rcvif->if_xname, rt->rt_ifp->if_xname); } if (mcopy) icmp6_error(mcopy, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE, 0); m_freem(m); goto freert; } #ifdef IPSEC /* * Check if the packet needs encapsulation. * ipsp_process_packet will never come back to here. * XXX ipsp_process_packet() calls ip6_output(), and there'll be no * PMTU notification. is it okay? */ if (sproto != 0) { tdb = gettdb(rtable_l2(m->m_pkthdr.rdomain), sspi, &sdst, sproto); if (tdb == NULL) { error = EHOSTUNREACH; m_freem(m); goto senderr; /*XXX*/ } #if NPF > 0 if ((encif = enc_getif(tdb->tdb_rdomain, tdb->tdb_tap)) == NULL || pf_test(AF_INET6, PF_FWD, encif, &m, NULL) != PF_PASS) { error = EHOSTUNREACH; m_freem(m); goto senderr; } if (m == NULL) goto senderr; ip6 = mtod(m, struct ip6_hdr *); /* * PF_TAG_REROUTE handling or not... * Packet is entering IPsec so the routing is * already overruled by the IPsec policy. * Until now the change was not reconsidered. * What's the behaviour? */ #endif in6_proto_cksum_out(m, encif); m->m_flags &= ~(M_BCAST | M_MCAST); /* just in case */ /* Callee frees mbuf */ error = ipsp_process_packet(m, tdb, AF_INET6, 0); m_freem(mcopy); goto freert; }