/* * Copyright (C) 1993-2001, 2003 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. */ #if !defined(lint) static const char sccsid[] = "%W% %G% (C) 1993-2000 Darren Reed"; static const char rcsid[] = "@(#)$Id: ip_fil_solaris.c,v 2.62.2.5 2004/05/10 12:42:07 darrenr Exp $"; #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "netinet/ip_compat.h" #ifdef USE_INET6 # include #endif #include "netinet/ip_fil.h" #include "netinet/ip_nat.h" #include "netinet/ip_frag.h" #include "netinet/ip_state.h" #include "netinet/ip_auth.h" #include "netinet/ip_proxy.h" #ifdef IPFILTER_LOOKUP # include "netinet/ip_lookup.h" #endif #include #include "md5.h" extern int fr_flags, fr_active; static int fr_send_ip __P((fr_info_t *fin, mblk_t *m)); ipfmutex_t ipl_mutex, ipf_authmx, ipf_rw, ipf_stinsert; ipfmutex_t ipf_nat_new, ipf_natio, ipf_timeoutlock; ipfrwlock_t ipf_mutex, ipf_global, ipf_ipidfrag; ipfrwlock_t ipf_frag, ipf_state, ipf_nat, ipf_natfrag, ipf_auth; kcondvar_t iplwait, ipfauthwait; #if SOLARIS2 >= 7 timeout_id_t fr_timer_id; u_int *ip_ttl_ptr = NULL; u_int *ip_mtudisc = NULL; # if SOLARIS2 >= 8 int *ip_forwarding = NULL; u_int *ip6_forwarding = NULL; # else u_int *ip_forwarding = NULL; # endif #else int fr_timer_id; u_long *ip_ttl_ptr = NULL; u_long *ip_mtudisc = NULL; u_long *ip_forwarding = NULL; #endif int ipf_locks_done = 0; /* ------------------------------------------------------------------------ */ /* Function: ipldetach */ /* Returns: int - 0 == success, else error. */ /* Parameters: Nil */ /* */ /* This function is responsible for undoing anything that might have been */ /* done in a call to iplattach(). It must be able to clean up from a call */ /* to iplattach() that did not succeed. Why might that happen? Someone */ /* configures a table to be so large that we cannot allocate enough memory */ /* for it. */ /* ------------------------------------------------------------------------ */ int ipldetach() { ASSERT(rw_read_locked(&ipf_global.ipf_lk) == 0); if (fr_control_forwarding & 2) { if (ip_forwarding != NULL) *ip_forwarding = 0; #if SOLARIS2 >= 8 if (ip6_forwarding != NULL) *ip6_forwarding = 0; #endif } #ifdef IPFDEBUG cmn_err(CE_CONT, "ipldetach()\n"); #endif fr_deinitialise(); (void) frflush(IPL_LOGIPF, 0, FR_INQUE|FR_OUTQUE|FR_INACTIVE); (void) frflush(IPL_LOGIPF, 0, FR_INQUE|FR_OUTQUE); if (ipf_locks_done == 1) { MUTEX_DESTROY(&ipf_timeoutlock); MUTEX_DESTROY(&ipf_rw); RW_DESTROY(&ipf_ipidfrag); ipf_locks_done = 0; } return 0; } int iplattach __P((void)) { int i; #ifdef IPFDEBUG cmn_err(CE_CONT, "iplattach()\n"); #endif ASSERT(rw_read_locked(&ipf_global.ipf_lk) == 0); bzero((char *)frcache, sizeof(frcache)); MUTEX_INIT(&ipf_rw, "ipf rw mutex"); MUTEX_INIT(&ipf_timeoutlock, "ipf timeout lock mutex"); RWLOCK_INIT(&ipf_ipidfrag, "ipf IP NAT-Frag rwlock"); ipf_locks_done = 1; if (fr_initialise() < 0) return -1; #if SOLARIS2 >= 8 ip_forwarding = &ip_g_forward; #endif /* * XXX - There is no terminator for this array, so it is not possible * to tell if what we are looking for is missing and go off the end * of the array. */ #if SOLARIS2 <= 8 for (i = 0; ; i++) { if (!strcmp(ip_param_arr[i].ip_param_name, "ip_def_ttl")) { ip_ttl_ptr = &ip_param_arr[i].ip_param_value; } else if (!strcmp(ip_param_arr[i].ip_param_name, "ip_path_mtu_discovery")) { ip_mtudisc = &ip_param_arr[i].ip_param_value; } #if SOLARIS2 < 8 else if (!strcmp(ip_param_arr[i].ip_param_name, "ip_forwarding")) { ip_forwarding = &ip_param_arr[i].ip_param_value; } #else else if (!strcmp(ip_param_arr[i].ip_param_name, "ip6_forwarding")) { ip6_forwarding = &ip_param_arr[i].ip_param_value; } #endif if (ip_mtudisc != NULL && ip_ttl_ptr != NULL && #if SOLARIS2 >= 8 ip6_forwarding != NULL && #endif ip_forwarding != NULL) break; } #endif if (fr_control_forwarding & 1) { if (ip_forwarding != NULL) *ip_forwarding = 1; #if SOLARIS2 >= 8 if (ip6_forwarding != NULL) *ip6_forwarding = 1; #endif } return 0; } /* * Filter ioctl interface. */ /*ARGSUSED*/ int iplioctl(dev, cmd, data, mode, cp, rp) dev_t dev; int cmd; #if SOLARIS2 >= 7 intptr_t data; #else int *data; #endif int mode; cred_t *cp; int *rp; { int error = 0, tmp; friostat_t fio; minor_t unit; u_int enable; #ifdef IPFDEBUG cmn_err(CE_CONT, "iplioctl(%x,%x,%x,%d,%x,%d)\n", dev, cmd, data, mode, cp, rp); #endif unit = getminor(dev); if (IPL_LOGMAX < unit) return ENXIO; if (fr_running <= 0) { if (unit != IPL_LOGIPF) return EIO; if (cmd != SIOCIPFGETNEXT && cmd != SIOCIPFGET && cmd != SIOCIPFSET && cmd != SIOCFRENB && cmd != SIOCGETFS && cmd != SIOCGETFF) return EIO; } READ_ENTER(&ipf_global); error = fr_ioctlswitch(unit, (caddr_t)data, cmd, mode); if (error != -1) { RWLOCK_EXIT(&ipf_global); return error; } error = 0; switch (cmd) { case SIOCFRENB : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&enable, sizeof(enable)); if (error != 0) { error = EFAULT; break; } RWLOCK_EXIT(&ipf_global); WRITE_ENTER(&ipf_global); if (enable) { if (fr_running > 0) error = 0; else error = iplattach(); if (error == 0) fr_running = 1; else (void) ipldetach(); } else { error = ipldetach(); if (error == 0) fr_running = -1; } } break; case SIOCIPFSET : if (!(mode & FWRITE)) { error = EPERM; break; } /* FALLTHRU */ case SIOCIPFGETNEXT : case SIOCIPFGET : error = fr_ipftune(cmd, (void *)data); break; case SIOCSETFF : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&fr_flags, sizeof(fr_flags)); if (error != 0) error = EFAULT; } break; case SIOCGETFF : error = COPYOUT((caddr_t)&fr_flags, (caddr_t)data, sizeof(fr_flags)); if (error != 0) error = EFAULT; break; case SIOCFUNCL : error = fr_resolvefunc((void *)data); break; case SIOCINAFR : case SIOCRMAFR : case SIOCADAFR : case SIOCZRLST : if (!(mode & FWRITE)) error = EPERM; else error = frrequest(unit, cmd, (caddr_t)data, fr_active, 1); break; case SIOCINIFR : case SIOCRMIFR : case SIOCADIFR : if (!(mode & FWRITE)) error = EPERM; else error = frrequest(unit, cmd, (caddr_t)data, 1 - fr_active, 1); break; case SIOCSWAPA : if (!(mode & FWRITE)) error = EPERM; else { WRITE_ENTER(&ipf_mutex); bzero((char *)frcache, sizeof(frcache[0]) * 2); error = COPYOUT((caddr_t)&fr_active, (caddr_t)data, sizeof(fr_active)); if (error != 0) error = EFAULT; else fr_active = 1 - fr_active; RWLOCK_EXIT(&ipf_mutex); } break; case SIOCGETFS : fr_getstat(&fio); error = fr_outobj((void *)data, &fio, IPFOBJ_IPFSTAT); break; case SIOCFRZST : if (!(mode & FWRITE)) error = EPERM; else error = fr_zerostats((caddr_t)data); break; case SIOCIPFFL : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (!error) { tmp = frflush(unit, 4, tmp); error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error != 0) error = EFAULT; } else error = EFAULT; } break; #ifdef USE_INET6 case SIOCIPFL6 : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (!error) { tmp = frflush(unit, 6, tmp); error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error != 0) error = EFAULT; } else error = EFAULT; } break; #endif case SIOCSTLCK : error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (error == 0) { fr_state_lock = tmp; fr_nat_lock = tmp; fr_frag_lock = tmp; fr_auth_lock = tmp; } else error = EFAULT; break; #ifdef IPFILTER_LOG case SIOCIPFFB : if (!(mode & FWRITE)) error = EPERM; else { tmp = ipflog_clear(unit); error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error) error = EFAULT; } break; #endif /* IPFILTER_LOG */ case SIOCFRSYN : if (!(mode & FWRITE)) error = EPERM; else { RWLOCK_EXIT(&ipf_global); WRITE_ENTER(&ipf_global); error = ipfsync(); } break; case SIOCGFRST : error = fr_outobj((void *)data, fr_fragstats(), IPFOBJ_FRAGSTAT); break; case FIONREAD : #ifdef IPFILTER_LOG tmp = (int)iplused[IPL_LOGIPF]; error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error != 0) error = EFAULT; #endif break; default : cmn_err(CE_NOTE, "Unknown: cmd %#x data %p", cmd, (void *)data); error = EINVAL; break; } RWLOCK_EXIT(&ipf_global); return error; } void *get_unit(name, v) char *name; int v; { void *ifp; qif_t *qf; int sap; if (v == 4) sap = 0x0800; else if (v == 6) sap = 0x86dd; else return NULL; rw_enter(&pfil_rw, RW_READER); qf = qif_iflookup(name, sap); rw_exit(&pfil_rw); return qf; } /* * routines below for saving IP headers to buffer */ /*ARGSUSED*/ int iplopen(devp, flags, otype, cred) dev_t *devp; int flags, otype; cred_t *cred; { minor_t min = getminor(*devp); #ifdef IPFDEBUG cmn_err(CE_CONT, "iplopen(%x,%x,%x,%x)\n", devp, flags, otype, cred); #endif if (!(otype & OTYP_CHR)) return ENXIO; min = (IPL_LOGMAX < min) ? ENXIO : 0; return min; } /*ARGSUSED*/ int iplclose(dev, flags, otype, cred) dev_t dev; int flags, otype; cred_t *cred; { minor_t min = getminor(dev); #ifdef IPFDEBUG cmn_err(CE_CONT, "iplclose(%x,%x,%x,%x)\n", dev, flags, otype, cred); #endif min = (IPL_LOGMAX < min) ? ENXIO : 0; return min; } #ifdef IPFILTER_LOG /* * iplread/ipllog * both of these must operate with at least splnet() lest they be * called during packet processing and cause an inconsistancy to appear in * the filter lists. */ /*ARGSUSED*/ int iplread(dev, uio, cp) dev_t dev; register struct uio *uio; cred_t *cp; { # ifdef IPFDEBUG cmn_err(CE_CONT, "iplread(%x,%x,%x)\n", dev, uio, cp); # endif # ifdef IPFILTER_SYNC if (getminor(dev) == IPL_LOGSYNC) return ipfsync_read(uio); # endif return ipflog_read(getminor(dev), uio); } #endif /* IPFILTER_LOG */ #ifdef IPFILTER_SYNC /* * iplread/ipllog * both of these must operate with at least splnet() lest they be * called during packet processing and cause an inconsistancy to appear in * the filter lists. */ int iplwrite(dev, uio, cp) dev_t dev; register struct uio *uio; cred_t *cp; { #ifdef IPFDEBUG cmn_err(CE_CONT, "iplwrite(%x,%x,%x)\n", dev, uio, cp); #endif if (getminor(dev) != IPL_LOGSYNC) return ENXIO; return ipfsync_write(uio); } #endif /* IPFILTER_SYNC */ /* * fr_send_reset - this could conceivably be a call to tcp_respond(), but that * requires a large amount of setting up and isn't any more efficient. */ int fr_send_reset(fin) fr_info_t *fin; { tcphdr_t *tcp, *tcp2; int tlen, hlen; mblk_t *m; #ifdef USE_INET6 ip6_t *ip6; #endif ip_t *ip; tcp = fin->fin_dp; if (tcp->th_flags & TH_RST) return -1; #ifndef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) return -1; #endif tlen = (tcp->th_flags & (TH_SYN|TH_FIN)) ? 1 : 0; #ifdef USE_INET6 if (fin->fin_v == 6) hlen = sizeof(ip6_t); else #endif hlen = sizeof(ip_t); hlen += sizeof(*tcp2); if ((m = (mblk_t *)allocb(hlen + 64, BPRI_HI)) == NULL) return -1; m->b_rptr += 64; MTYPE(m) = M_DATA; m->b_wptr = m->b_rptr + hlen; bzero((char *)m->b_rptr, hlen); tcp2 = (struct tcphdr *)(m->b_rptr + hlen - sizeof(*tcp2)); tcp2->th_dport = tcp->th_sport; tcp2->th_sport = tcp->th_dport; if (tcp->th_flags & TH_ACK) { tcp2->th_seq = tcp->th_ack; tcp2->th_flags = TH_RST; } else { tcp2->th_ack = ntohl(tcp->th_seq); tcp2->th_ack += tlen; tcp2->th_ack = htonl(tcp2->th_ack); tcp2->th_flags = TH_RST|TH_ACK; } tcp2->th_off = sizeof(struct tcphdr) >> 2; ip = (ip_t *)m->b_rptr; ip->ip_v = fin->fin_v; #ifdef USE_INET6 if (fin->fin_v == 6) { ip6 = (ip6_t *)m->b_rptr; ip6->ip6_src = fin->fin_dst6; ip6->ip6_dst = fin->fin_src6; ip6->ip6_plen = htons(sizeof(*tcp)); ip6->ip6_nxt = IPPROTO_TCP; } else #endif { ip->ip_src.s_addr = fin->fin_daddr; ip->ip_dst.s_addr = fin->fin_saddr; ip->ip_id = fr_nextipid(fin); ip->ip_hl = sizeof(*ip) >> 2; ip->ip_p = IPPROTO_TCP; ip->ip_len = htons(sizeof(*ip) + sizeof(*tcp)); ip->ip_tos = fin->fin_ip->ip_tos; tcp2->th_sum = fr_cksum(m, ip, IPPROTO_TCP, tcp2); } return fr_send_ip(fin, m); } /*ARGSUSED*/ static int fr_send_ip(fin, m) fr_info_t *fin; mblk_t *m; { int i; #ifdef USE_INET6 if (fin->fin_v == 6) { ip6_t *ip6; ip6 = (ip6_t *)m->b_rptr; ip6->ip6_flow = 0; ip6->ip6_vfc = 0x60; ip6->ip6_hlim = 127; } else #endif { ip_t *ip; ip = (ip_t *)m->b_rptr; if (ip_ttl_ptr != NULL) ip->ip_ttl = (u_char)(*ip_ttl_ptr); else ip->ip_ttl = 63; if (ip_mtudisc != NULL) ip->ip_off = htons(*ip_mtudisc ? IP_DF : 0); else ip->ip_off = htons(IP_DF); ip->ip_sum = ipf_cksum((u_short *)ip, sizeof(*ip)); } i = fr_fastroute(m, &m, fin, NULL); return i; } int fr_send_icmp_err(type, fin, dst) int type; fr_info_t *fin; int dst; { struct in_addr dst4; struct icmp *icmp; qpktinfo_t *qpi; int hlen, code; u_short sz; #ifdef USE_INET6 mblk_t *mb; #endif mblk_t *m; #ifdef USE_INET6 ip6_t *ip6; #endif ip_t *ip; if ((type < 0) || (type > ICMP_MAXTYPE)) return -1; code = fin->fin_icode; #ifdef USE_INET6 if ((code < 0) || (code > sizeof(icmptoicmp6unreach)/sizeof(int))) return -1; #endif #ifndef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) return -1; #endif qpi = fin->fin_qpi; #ifdef USE_INET6 mb = fin->fin_qfm; if (fin->fin_v == 6) { sz = sizeof(ip6_t); sz += MIN(mb->b_wptr - mb->b_rptr, 512); hlen = sizeof(ip6_t); type = icmptoicmp6types[type]; if (type == ICMP6_DST_UNREACH) code = icmptoicmp6unreach[code]; } else #endif { if ((fin->fin_p == IPPROTO_ICMP) && !(fin->fin_flx & FI_SHORT)) switch (ntohs(fin->fin_data[0]) >> 8) { case ICMP_ECHO : case ICMP_TSTAMP : case ICMP_IREQ : case ICMP_MASKREQ : break; default : return 0; } sz = sizeof(ip_t) * 2; sz += 8; /* 64 bits of data */ hlen = sizeof(ip_t); } sz += offsetof(struct icmp, icmp_ip); if ((m = (mblk_t *)allocb((size_t)sz + 64, BPRI_HI)) == NULL) return -1; MTYPE(m) = M_DATA; m->b_rptr += 64; m->b_wptr = m->b_rptr + sz; bzero((char *)m->b_rptr, (size_t)sz); ip = (ip_t *)m->b_rptr; ip->ip_v = fin->fin_v; icmp = (struct icmp *)(m->b_rptr + hlen); icmp->icmp_type = type & 0xff; icmp->icmp_code = code & 0xff; #ifdef icmp_nextmtu if (type == ICMP_UNREACH && (qpi->qpi_max_frag != 0) && fin->fin_icode == ICMP_UNREACH_NEEDFRAG) icmp->icmp_nextmtu = htons(qpi->qpi_max_frag); #endif #ifdef USE_INET6 if (fin->fin_v == 6) { struct in6_addr dst6; int csz; if (dst == 0) { if (fr_ifpaddr(6, FRI_NORMAL, qpi->qpi_real, (struct in_addr *)&dst6, NULL) == -1) { FREE_MB_T(m); return -1; } } else dst6 = fin->fin_dst6; csz = sz; sz -= sizeof(ip6_t); ip6 = (ip6_t *)m->b_rptr; ip6->ip6_plen = htons((u_short)sz); ip6->ip6_nxt = IPPROTO_ICMPV6; ip6->ip6_src = dst6; ip6->ip6_dst = fin->fin_src6; sz -= offsetof(struct icmp, icmp_ip); bcopy((char *)mb->b_rptr, (char *)&icmp->icmp_ip, sz); icmp->icmp_cksum = csz - sizeof(ip6_t); } else #endif { ip->ip_hl = sizeof(*ip) >> 2; ip->ip_p = IPPROTO_ICMP; ip->ip_id = fin->fin_ip->ip_id; ip->ip_tos = fin->fin_ip->ip_tos; ip->ip_len = htons((u_short)sz); if (dst == 0) { if (fr_ifpaddr(4, FRI_NORMAL, qpi->qpi_real, &dst4, NULL) == -1) { FREE_MB_T(m); return -1; } } else dst4 = fin->fin_dst; ip->ip_src = dst4; ip->ip_dst = fin->fin_src; bcopy((char *)fin->fin_ip, (char *)&icmp->icmp_ip, sizeof(*fin->fin_ip)); bcopy((char *)fin->fin_ip + fin->fin_hlen, (char *)&icmp->icmp_ip + sizeof(*fin->fin_ip), 8); icmp->icmp_cksum = ipf_cksum((u_short *)icmp, sz - sizeof(ip_t)); } /* * Need to exit out of these so we don't recursively call rw_enter * from fr_qout. */ return fr_send_ip(fin, m); } /* * return the first IP Address associated with an interface */ /*ARGSUSED*/ int fr_ifpaddr(v, atype, qifptr, inp, inpmask) int v, atype; void *qifptr; struct in_addr *inp, *inpmask; { #ifdef USE_INET6 struct sockaddr_in6 sin6, mask6; #endif struct sockaddr_in sin, mask; qif_t *qif; if ((qifptr == NULL) || (qifptr == (void *)-1)) return -1; qif = qifptr; #ifdef USE_INET6 if (v == 6) { in6_addr_t *inp6; ipif_t *ipif; ill_t *ill; ill = qif->qf_ill; /* * First is always link local. */ for (ipif = ill->ill_ipif; ipif; ipif = ipif->ipif_next) { inp6 = &ipif->ipif_v6lcl_addr; if (!IN6_IS_ADDR_LINKLOCAL(inp6) && !IN6_IS_ADDR_LOOPBACK(inp6)) break; } if (ipif == NULL) return -1; mask6.sin6_addr = ipif->ipif_v6net_mask; if (atype == FRI_BROADCAST) sin6.sin6_addr = ipif->ipif_v6brd_addr; else if (atype == FRI_PEERADDR) sin6.sin6_addr = ipif->ipif_v6pp_dst_addr; else sin6.sin6_addr = *inp6; return fr_ifpfillv6addr(atype, &sin6, &mask6, inp, inpmask); } #endif switch (atype) { case FRI_BROADCAST : sin.sin_addr.s_addr = QF_V4_BROADCAST(qif); break; case FRI_PEERADDR : sin.sin_addr.s_addr = QF_V4_PEERADDR(qif); break; default : sin.sin_addr.s_addr = QF_V4_ADDR(qif); break; } mask.sin_addr.s_addr = QF_V4_NETMASK(qif); return fr_ifpfillv4addr(atype, &sin, &mask, inp, inpmask); } u_32_t fr_newisn(fin) fr_info_t *fin; { static int iss_seq_off = 0; u_char hash[16]; u_32_t newiss; MD5_CTX ctx; /* * Compute the base value of the ISS. It is a hash * of (saddr, sport, daddr, dport, secret). */ MD5Init(&ctx); MD5Update(&ctx, (u_char *) &fin->fin_fi.fi_src, sizeof(fin->fin_fi.fi_src)); MD5Update(&ctx, (u_char *) &fin->fin_fi.fi_dst, sizeof(fin->fin_fi.fi_dst)); MD5Update(&ctx, (u_char *) &fin->fin_dat, sizeof(fin->fin_dat)); MD5Update(&ctx, ipf_iss_secret, sizeof(ipf_iss_secret)); MD5Final(hash, &ctx); bcopy(hash, &newiss, sizeof(newiss)); /* * Now increment our "timer", and add it in to * the computed value. * * XXX Use `addin'? * XXX TCP_ISSINCR too large to use? */ iss_seq_off += 0x00010000; newiss += iss_seq_off; return newiss; } /* ------------------------------------------------------------------------ */ /* Function: fr_nextipid */ /* Returns: int - 0 == success, -1 == error (packet should be droppped) */ /* Parameters: fin(I) - pointer to packet information */ /* */ /* Returns the next IPv4 ID to use for this packet. */ /* ------------------------------------------------------------------------ */ INLINE u_short fr_nextipid(fin) fr_info_t *fin; { static u_short ipid = 0; ipstate_t *is; nat_t *nat; u_short id; MUTEX_ENTER(&ipf_rw); if (fin->fin_state != NULL) { is = fin->fin_state; id = (u_short)(is->is_pkts[(fin->fin_rev << 1) + 1] & 0xffff); } else if (fin->fin_nat != NULL) { nat = fin->fin_nat; id = (u_short)(nat->nat_pkts[fin->fin_out] & 0xffff); } else id = ipid++; MUTEX_EXIT(&ipf_rw); return id; } #ifndef IPFILTER_CKSUM /* ARGSUSED */ #endif INLINE void fr_checkv4sum(fin) fr_info_t *fin; { #ifdef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) fin->fin_flx |= FI_BAD; #endif } #ifdef USE_INET6 # ifndef IPFILTER_CKSUM /* ARGSUSED */ # endif INLINE void fr_checkv6sum(fin) fr_info_t *fin; { # ifdef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) fin->fin_flx |= FI_BAD; # endif } #endif /* USE_INET6 */ /* * Function: fr_verifysrc * Returns: int (really boolean) * Parameters: fin - packet information * * Check whether the packet has a valid source address for the interface on * which the packet arrived, implementing the "fr_chksrc" feature. * Returns true iff the packet's source address is valid. * Pre-Solaris 10, we call into the routing code to make the determination. * On Solaris 10 and later, we have a valid address set from pfild to check * against. */ int fr_verifysrc(fin) fr_info_t *fin; { ire_t *dir; int result; #if SOLARIS2 >= 6 ire_t *gw; dir = ire_route_lookup(fin->fin_saddr, 0xffffffff, 0, 0, NULL, &gw, NULL, MATCH_IRE_DSTONLY|MATCH_IRE_DEFAULT| MATCH_IRE_RECURSIVE); #else dir = ire_lookup(fin->fin_saddr); #endif if (!dir) return 0; result = (ire_to_ill(dir) == fin->fin_ifp); #if SOLARIS2 >= 8 ire_refrele(dir); #endif return result; } #if (SOLARIS2 < 7) void fr_slowtimer() #else /*ARGSUSED*/ void fr_slowtimer __P((void *ptr)) #endif { WRITE_ENTER(&ipf_global); if (fr_running <= 0) { if (fr_running == -1) fr_timer_id = timeout(fr_slowtimer, NULL, drv_usectohz(500000)); else fr_timer_id = NULL; RWLOCK_EXIT(&ipf_global); return; } MUTEX_DOWNGRADE(&ipf_global); fr_fragexpire(); fr_timeoutstate(); fr_natexpire(); fr_authexpire(); fr_ticks++; if (fr_running == -1 || fr_running == 1) fr_timer_id = timeout(fr_slowtimer, NULL, drv_usectohz(500000)); else fr_timer_id = NULL; RWLOCK_EXIT(&ipf_global); } /* * Function: fr_fastroute * Returns: 0: success; * -1: failed * Parameters: * mb: the message block where ip head starts * mpp: the pointer to the pointer of the orignal * packet message * fin: packet information * fdp: destination interface information * if it is NULL, no interface information provided. * * This function is for fastroute/to/dup-to rules. It calls * pfil_make_lay2_packet to search route, make lay-2 header * ,and identify output queue for the IP packet. * The destination address depends on the following conditions: * 1: for fastroute rule, fdp is passed in as NULL, so the * destination address is the IP Packet's destination address * 2: for to/dup-to rule, if an ip address is specified after * the interface name, this address is the as destination * address. Otherwise IP Packet's destination address is used */ int fr_fastroute(mb, mpp, fin, fdp) mblk_t *mb, **mpp; fr_info_t *fin; frdest_t *fdp; { struct in_addr dst; queue_t *q = NULL; mblk_t *mp = NULL; ire_t *dir, *gw; size_t hlen = 0; qpktinfo_t *qpi; frentry_t *fr; frdest_t fd; ill_t *ifp; u_char *s; ip_t *ip; #ifndef sparc u_short __iplen, __ipoff; #endif #ifdef USE_INET6 ip6_t *ip6 = (ip6_t *)fin->fin_ip; struct in6_addr dst6; #endif fr = fin->fin_fr; ip = fin->fin_ip; qpi = fin->fin_qpi; /* * If this is a duplicate mblk then we want ip to point at that * data, not the original, if and only if it is already pointing at * the current mblk data. */ if (ip == (ip_t *)qpi->qpi_m->b_rptr && qpi->qpi_m != mb) ip = (ip_t *)mb->b_rptr; /* * If there is another M_PROTO, we don't want it */ if (*mpp != mb) { mp = unlinkb(*mpp); freeb(*mpp); *mpp = mp; } /* * If the fdp is NULL then there is no set route for this packet. */ if (fdp == NULL) { ifp = fin->fin_ifp; switch (fin->fin_v) { case 4 : fd.fd_ip = ip->ip_dst; break; #ifdef USE_INET6 case 6 : fd.fd_ip6.in6 = ip6->ip6_dst; break; #endif } fdp = &fd; } else { ifp = fdp->fd_ifp; if (ifp == NULL || ifp == (void *)-1) goto bad_fastroute; } /* * In case we're here due to "to " being used with * "keep state", check that we're going in the correct * direction. */ if ((fr != NULL) && (fin->fin_rev != 0)) { if ((ifp != NULL) && (fdp == &fr->fr_tif)) return -1; dst.s_addr = fin->fin_fi.fi_daddr; } else { if (fin->fin_v == 4) { if (fdp->fd_ip.s_addr != 0) dst = fdp->fd_ip; else dst.s_addr = fin->fin_fi.fi_daddr; } #ifdef USE_INET6 else if (fin->fin_v == 6) { if (IP6_NOTZERO(&fdp->fd_ip)) dst6 = fdp->fd_ip6.in6; else dst6 = fin->fin_dst6; } #endif } #if SOLARIS2 >= 6 gw = NULL; if (fin->fin_v == 4) { dir = ire_route_lookup(dst.s_addr, 0xffffffff, 0, 0, NULL, &gw, NULL, MATCH_IRE_DSTONLY| MATCH_IRE_DEFAULT|MATCH_IRE_RECURSIVE); } # ifdef USE_INET6 else if (fin->fin_v == 6) { dir = ire_route_lookup_v6(&ip6->ip6_dst, NULL, 0, 0, NULL, &gw, NULL, MATCH_IRE_DSTONLY| MATCH_IRE_DEFAULT|MATCH_IRE_RECURSIVE); } # endif #else dir = ire_lookup(dst.s_addr); #endif #if SOLARIS2 < 8 if (dir != NULL) if (dir->ire_ll_hdr_mp == NULL || dir->ire_ll_hdr_length == 0) dir = NULL; #else if (dir != NULL) if (dir->ire_fp_mp == NULL || dir->ire_dlureq_mp == NULL) dir = NULL; #endif if (dir != NULL) { #if SOLARIS2 < 8 mp = dir->ire_ll_hdr_mp; hlen = dir->ire_ll_hdr_length; #else mp = dir->ire_fp_mp; hlen = mp ? mp->b_wptr - mp->b_rptr : 0; if (mp == NULL) mp = dir->ire_dlureq_mp; #endif if (fin->fin_out == 0) { void *saveifp; u_32_t pass; saveifp = fin->fin_ifp; fin->fin_ifp = ifp; fin->fin_out = 1; fr_acctpkt(fin, &pass); fin->fin_fr = NULL; if (!fr || !(fr->fr_flags & FR_RETMASK)) (void) fr_checkstate(fin, &pass); switch (fr_checknatout(fin, NULL)) { case 0 : break; case 1 : ip->ip_sum = 0; break; case -1 : goto bad_fastroute; break; } fin->fin_out = 0; fin->fin_ifp = saveifp; } #ifndef sparc if (fin->fin_v == 4) { __iplen = (u_short)ip->ip_len, __ipoff = (u_short)ip->ip_off; ip->ip_len = htons(__iplen); ip->ip_off = htons(__ipoff); } #endif if (mp != NULL) { s = mb->b_rptr; if ( #if (SOLARIS2 >= 6) && defined(ICK_M_CTL_MAGIC) (dohwcksum && ifp->ill_ick.ick_magic == ICK_M_CTL_MAGIC) || #endif (hlen && (s - mb->b_datap->db_base) >= hlen)) { s -= hlen; mb->b_rptr = (u_char *)s; bcopy((char *)mp->b_rptr, (char *)s, hlen); } else { mblk_t *mp2; mp2 = copyb(mp); if (mp2 == NULL) goto bad_fastroute; linkb(mp2, mb); mb = mp2; } } *mpp = mb; if (dir->ire_stq != NULL) q = dir->ire_stq; else if (dir->ire_rfq != NULL) q = WR(dir->ire_rfq); if (q != NULL) q = q->q_next; if (q != NULL) { RWLOCK_EXIT(&ipf_global); #if (SOLARIS2 >= 6) && defined(ICK_M_CTL_MAGIC) if ((fin->fin_p == IPPROTO_TCP) && dohwcksum && (ifp->ill_ick.ick_magic == ICK_M_CTL_MAGIC)) { tcphdr_t *tcp; u_32_t t; tcp = (tcphdr_t *)((char *)ip + fin->fin_hlen); t = ip->ip_src.s_addr; t += ip->ip_dst.s_addr; t += 30; t = (t & 0xffff) + (t >> 16); tcp->th_sum = t & 0xffff; } #endif putnext(q, mb); ATOMIC_INCL(fr_frouteok[0]); READ_ENTER(&ipf_global); return 0; } } bad_fastroute: freemsg(mb); ATOMIC_INCL(fr_frouteok[1]); return -1; }