This file is in /sys/netinet
This commit is contained in:
martti
parent
b035470c38
commit
e6acaff1c5
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/* $NetBSD: ip_ipsec_pxy.c,v 1.1.1.1 2002/01/24 08:18:29 martti Exp $ */
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/*
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* Simple ISAKMP transparent proxy for in-kernel use. For use with the NAT
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* code.
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*
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* Id: ip_ipsec_pxy.c,v 1.1.2.10 2002/01/13 04:58:29 darrenr Exp
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*
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*/
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#define IPF_IPSEC_PROXY
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int ippr_ipsec_init __P((void));
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int ippr_ipsec_new __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *));
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void ippr_ipsec_del __P((ap_session_t *));
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int ippr_ipsec_out __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *));
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int ippr_ipsec_match __P((fr_info_t *, ap_session_t *, nat_t *));
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static frentry_t ipsecfr;
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static char ipsec_buffer[1500];
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/*
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* RCMD application proxy initialization.
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*/
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int ippr_ipsec_init()
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{
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bzero((char *)&ipsecfr, sizeof(ipsecfr));
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ipsecfr.fr_ref = 1;
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ipsecfr.fr_flags = FR_OUTQUE|FR_PASS|FR_QUICK|FR_KEEPSTATE;
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return 0;
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}
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/*
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* Setup for a new IPSEC proxy.
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*/
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int ippr_ipsec_new(fin, ip, aps, nat)
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fr_info_t *fin;
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ip_t *ip;
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ap_session_t *aps;
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nat_t *nat;
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{
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ipsec_pxy_t *ipsec;
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fr_info_t fi;
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ipnat_t *ipn;
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char *ptr;
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int p, off, dlen;
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mb_t *m;
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bzero(ipsec_buffer, sizeof(ipsec_buffer));
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off = fin->fin_hlen + sizeof(udphdr_t);
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#ifdef _KERNEL
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# if SOLARIS
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m = fin->fin_qfm;
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dlen = msgdsize(m) - off;
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if (dlen < 16)
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return -1;
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copyout_mblk(m, off, MIN(sizeof(ipsec_buffer), dlen), ipsec_buffer);
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# else
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m = *(mb_t **)fin->fin_mp;
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dlen = mbufchainlen(m) - off;
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if (dlen < 16)
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return -1;
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m_copydata(m, off, MIN(sizeof(ipsec_buffer), dlen), ipsec_buffer);
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# endif
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#else
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m = *(mb_t **)fin->fin_mp;
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dlen = ip->ip_len - off;
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ptr = (char *)m;
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ptr += off;
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bcopy(ptr, ipsec_buffer, MIN(sizeof(ipsec_buffer), dlen));
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#endif
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/*
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* Because _new() gets called from nat_new(), ipf_nat is held with a
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* write lock so pass rw=1 to nat_outlookup().
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*/
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if (nat_outlookup(fin, 0, IPPROTO_ESP, nat->nat_inip,
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ip->ip_dst, 1) != NULL)
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return -1;
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aps->aps_psiz = sizeof(*ipsec);
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KMALLOCS(aps->aps_data, ipsec_pxy_t *, sizeof(*ipsec));
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if (aps->aps_data == NULL)
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return -1;
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ipsec = aps->aps_data;
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bzero((char *)ipsec, sizeof(*ipsec));
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/*
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* Create NAT rule against which the tunnel/transport mapping is
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* created. This is required because the current NAT rule does not
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* describe ESP but UDP instead.
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*/
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ipn = &ipsec->ipsc_rule;
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ipn->in_ifp = fin->fin_ifp;
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ipn->in_apr = NULL;
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ipn->in_use = 1;
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ipn->in_hits = 1;
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ipn->in_nip = ntohl(nat->nat_outip.s_addr);
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ipn->in_ippip = 1;
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ipn->in_inip = nat->nat_inip.s_addr;
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ipn->in_inmsk = 0xffffffff;
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ipn->in_outip = nat->nat_outip.s_addr;
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ipn->in_outmsk = 0xffffffff;
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ipn->in_srcip = fin->fin_saddr;
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ipn->in_srcmsk = 0xffffffff;
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ipn->in_redir = NAT_MAP;
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bcopy(nat->nat_ptr->in_ifname, ipn->in_ifname, sizeof(ipn->in_ifname));
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ipn->in_p = IPPROTO_ESP;
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bcopy((char *)fin, (char *)&fi, sizeof(fi));
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fi.fin_fi.fi_p = IPPROTO_ESP;
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fi.fin_fr = &ipsecfr;
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fi.fin_data[0] = 0;
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fi.fin_data[1] = 0;
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p = ip->ip_p;
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ip->ip_p = IPPROTO_ESP;
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fi.fin_fl &= ~FI_TCPUDP;
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ptr = ipsec_buffer;
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bcopy(ptr, ipsec->ipsc_icookie, sizeof(ipsec_cookie_t));
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ptr += sizeof(ipsec_cookie_t);
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bcopy(ptr, ipsec->ipsc_rcookie, sizeof(ipsec_cookie_t));
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/*
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* The responder cookie should only be non-zero if the initiator
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* cookie is non-zero. Therefore, it is safe to assume(!) that the
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* cookies are both set after copying if the responder is non-zero.
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*/
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if ((ipsec->ipsc_rcookie[0]|ipsec->ipsc_rcookie[1]) != 0)
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ipsec->ipsc_rckset = 1;
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else
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nat->nat_age = 60; /* 30 seconds */
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ipsec->ipsc_nat = nat_new(&fi, ip, ipn, &ipsec->ipsc_nat, FI_IGNOREPKT,
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NAT_OUTBOUND);
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if (ipsec->ipsc_nat != NULL) {
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fi.fin_data[0] = 0;
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fi.fin_data[1] = 0;
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ipsec->ipsc_state = fr_addstate(ip, &fi, &ipsec->ipsc_state,
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FI_IGNOREPKT|FI_NORULE);
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}
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ip->ip_p = p;
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return 0;
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}
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/*
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* For outgoing IKE packets. refresh timeouts for NAT & stat entries, if
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* we can. If they have disappeared, recreate them.
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*/
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int ippr_ipsec_out(fin, ip, aps, nat)
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fr_info_t *fin;
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ip_t *ip;
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ap_session_t *aps;
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nat_t *nat;
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{
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ipsec_pxy_t *ipsec;
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fr_info_t fi;
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int p;
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bcopy((char *)fin, (char *)&fi, sizeof(fi));
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fi.fin_fi.fi_p = IPPROTO_ESP;
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fi.fin_fr = &ipsecfr;
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fi.fin_data[0] = 0;
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fi.fin_data[1] = 0;
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p = ip->ip_p;
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ip->ip_p = IPPROTO_ESP;
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fi.fin_fl &= ~FI_TCPUDP;
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ipsec = aps->aps_data;
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if (ipsec != NULL) {
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/*
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* Update NAT timeout/create NAT if missing.
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*/
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if (ipsec->ipsc_rckset == 0)
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nat->nat_age = 60; /* 30 seconds */
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if (ipsec->ipsc_nat != NULL)
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ipsec->ipsc_nat->nat_age = nat->nat_age;
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else
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ipsec->ipsc_nat = nat_new(&fi, ip, &ipsec->ipsc_rule,
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&ipsec->ipsc_nat,
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FI_IGNOREPKT, NAT_OUTBOUND);
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/*
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* Update state timeout/create state if missing.
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*/
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READ_ENTER(&ipf_state);
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if (ipsec->ipsc_state != NULL) {
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ipsec->ipsc_state->is_age = nat->nat_age;
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RWLOCK_EXIT(&ipf_state);
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} else {
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RWLOCK_EXIT(&ipf_state);
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fi.fin_data[0] = 0;
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fi.fin_data[1] = 0;
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ipsec->ipsc_state = fr_addstate(ip, &fi,
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&ipsec->ipsc_state,
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FI_IGNOREPKT|FI_NORULE);
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}
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}
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ip->ip_p = p;
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return 0;
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}
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/*
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* This extends the NAT matching to be based on the cookies associated with
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* a session and found at the front of IKE packets. The cookies are always
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* in the same order (not reversed depending on packet flow direction as with
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* UDP/TCP port numbers).
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*/
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int ippr_ipsec_match(fin, aps, nat)
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fr_info_t *fin;
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ap_session_t *aps;
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nat_t *nat;
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{
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ipsec_pxy_t *ipsec;
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u_32_t cookies[4];
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mb_t *m;
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int off;
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if ((fin->fin_dlen < sizeof(cookies)) || (fin->fin_fl & FI_FRAG))
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return -1;
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ipsec = aps->aps_data;
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off = fin->fin_hlen + sizeof(udphdr_t);
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#ifdef _KERNEL
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# if SOLARIS
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m = fin->fin_qfm;
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copyout_mblk(m, off, sizeof(cookies), (char *)cookies);
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# else
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m = *(mb_t **)fin->fin_mp;
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m_copydata(m, off, sizeof(cookies), (char *)cookies);
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# endif
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#else
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m = *(mb_t **)fin->fin_mp;
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bcopy((char *)m + off, cookies, sizeof(cookies));
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#endif
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if ((cookies[0] != ipsec->ipsc_icookie[0]) ||
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(cookies[1] != ipsec->ipsc_icookie[1]))
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return -1;
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if (ipsec->ipsc_rckset == 0) {
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if ((cookies[2]|cookies[3]) == 0) {
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nat->nat_age = 60; /* 30 seconds */
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return 0;
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}
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ipsec->ipsc_rckset = 1;
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ipsec->ipsc_rcookie[0] = cookies[2];
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ipsec->ipsc_rcookie[1] = cookies[3];
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return 0;
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}
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if ((cookies[2] != ipsec->ipsc_rcookie[0]) ||
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(cookies[3] != ipsec->ipsc_rcookie[1]))
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return -1;
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return 0;
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}
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/*
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* clean up after ourselves.
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*/
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void ippr_ipsec_del(aps)
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ap_session_t *aps;
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{
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ipsec_pxy_t *ipsec;
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ipsec = aps->aps_data;
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if (ipsec != NULL) {
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/*
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* Don't delete it from here, just schedule it to be
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* deleted ASAP.
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*/
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if (ipsec->ipsc_nat != NULL) {
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ipsec->ipsc_nat->nat_age = 1;
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ipsec->ipsc_nat->nat_ptr = NULL;
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}
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READ_ENTER(&ipf_state);
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if (ipsec->ipsc_state != NULL)
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ipsec->ipsc_state->is_age = 1;
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RWLOCK_EXIT(&ipf_state);
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ipsec->ipsc_state = NULL;
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ipsec->ipsc_nat = NULL;
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}
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}
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/* $NetBSD: ip_netbios_pxy.c,v 1.1.1.1 2002/01/24 08:18:30 martti Exp $ */
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/*
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* Simple netbios-dgm transparent proxy for in-kernel use.
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* For use with the NAT code.
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* Id: ip_netbios_pxy.c,v 1.1.2.3 2002/01/09 09:28:37 darrenr Exp
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*/
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/*-
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* Copyright (c) 2002 Paul J. Ledbetter III
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Id: ip_netbios_pxy.c,v 1.1.2.3 2002/01/09 09:28:37 darrenr Exp
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*/
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#define IPF_NETBIOS_PROXY
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int ippr_netbios_init __P((void));
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int ippr_netbios_out __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *));
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static frentry_t netbiosfr;
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/*
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* Initialize local structures.
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*/
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int ippr_netbios_init()
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{
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bzero((char *)&netbiosfr, sizeof(netbiosfr));
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netbiosfr.fr_ref = 1;
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netbiosfr.fr_flags = FR_INQUE|FR_PASS|FR_QUICK|FR_KEEPSTATE;
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return 0;
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}
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int ippr_netbios_out(fin, ip, aps, nat)
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fr_info_t *fin;
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ip_t *ip;
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ap_session_t *aps;
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nat_t *nat;
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{
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char dgmbuf[6];
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int off, dlen;
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udphdr_t *udp;
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mb_t *m;
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m = *(mb_t **)fin->fin_mp;
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off = fin->fin_hlen + sizeof(udphdr_t);
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#if SOLARIS
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dlen = msgdsize(m);
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#else
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dlen = mbufchainlen(m);
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#endif
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dlen -= off;
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/*
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* no net bios datagram could possibly be shorter than this
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*/
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if (dlen < 11)
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return 0;
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udp = (udphdr_t *)fin->fin_dp;
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/*
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* move past the
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* ip header;
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* udp header;
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* 4 bytes into the net bios dgm header.
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* According to rfc1002, this should be the exact location of
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* the source address/port
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*/
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off += 4;
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/* Copy NATed source Address/port*/
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dgmbuf[0] = (char)((ip->ip_src.s_addr ) &0xFF);
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dgmbuf[1] = (char)((ip->ip_src.s_addr >> 8) &0xFF);
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dgmbuf[2] = (char)((ip->ip_src.s_addr >> 16)&0xFF);
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dgmbuf[3] = (char)((ip->ip_src.s_addr >> 24)&0xFF);
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dgmbuf[4] = (char)((udp->uh_sport )&0xFF);
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dgmbuf[5] = (char)((udp->uh_sport >> 8)&0xFF);
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/* replace data in packet */
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#if SOLARIS
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copyin_mblk(m, off, sizeof(dgmbuf), dgmbuf);
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#else
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m_copyback(m, off, sizeof(dgmbuf), dgmbuf);
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#endif
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return 0;
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}
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