pfkey_v2_parser.c

FREESWAN VPN源代码包

	tdbq = ipsec_sa_getbyid(&(extr->tdb->tdb_said));
	if (!tdbq) {
		spin_unlock_bh(&tdb_lock);
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_update_parse: "
			    "reserved Tunnel Descriptor Block for SA: %s not found.  Call SADB_GETSPI first or call SADB_ADD instead.\n",
			    sa_len ? sa : " (error)");
		SENDERR(ENOENT);
	}

	if(ip_chk_addr((unsigned long)extr->tdb->tdb_said.dst.s_addr) == IS_MYADDR) {
		extr->tdb->tdb_flags |= EMT_INBOUND;
	}

	KLIPS_PRINT(debug_pfkey,
		    "klips_debug:pfkey_update_parse: "
		    "existing Tunnel Descriptor Block found (this is good) for SA: %s, %s-bound, updating.\n",
		    sa_len ? sa : " (error)",
		    extr->tdb->tdb_flags & EMT_INBOUND ? "in" : "out");

#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
        if (extr->tdb->ips_natt_sport || extr->tdb->ips_natt_dport) {
                KLIPS_PRINT(debug_pfkey,
                        "klips_debug:pfkey_update_parse: only updating NAT-T ports "
                        "(%u:%u -> %u:%u)\n",
                        tdbq->ips_natt_sport, tdbq->ips_natt_dport,
                        extr->tdb->ips_natt_sport, extr->tdb->ips_natt_dport);

                if (extr->tdb->ips_natt_sport) {
                        tdbq->ips_natt_sport = extr->tdb->ips_natt_sport;
                        if (tdbq->ips_addr_s->sa_family == AF_INET) {
                                ((struct sockaddr_in *)(tdbq->ips_addr_s))->sin_port = htons(extr->tdb->ips_natt_sport);
                        }
                }
                                               
                if (extr->tdb->ips_natt_dport) {                         
                        tdbq->ips_natt_dport = extr->tdb->ips_natt_dport;
                        if (tdbq->ips_addr_d->sa_family == AF_INET) {
                                ((struct sockaddr_in *)(tdbq->ips_addr_d))->sin_port = htons(extr->tdb->ips_natt_dport);
                        }
                }
                nat_t_tdb_saved = extr->tdb;
                extr->tdb = tdbq;
	}
	else {
#endif 

	
	/* XXX extr->tdb->tdb_rcvif = &(enc_softc[em->em_if].enc_if);*/
	extr->tdb->tdb_rcvif = NULL;
	if ((error = pfkey_ipsec_sa_init(extr->tdb, extensions))) {
		spin_unlock_bh(&tdb_lock);
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_update_parse: "
			    "not successful for SA: %s, deleting.\n",
			    sa_len ? sa : " (error)");
		SENDERR(-error);
	}

	extr->tdb->ips_life.ipl_addtime.ipl_count = tdbq->ips_life.ipl_addtime.ipl_count;
	if((error = ipsec_sa_delchain(tdbq))) {
		spin_unlock_bh(&tdb_lock);
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_update_parse: "
			    "error=%d, trouble deleting intermediate tdb for SA=%s.\n",
			    error,
			    sa_len ? sa : " (error)");
		SENDERR(-error);
	}
#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
	}
#endif

	spin_unlock_bh(&tdb_lock);
	
	if(!(pfkey_safe_build(error = pfkey_msg_hdr_build(&extensions_reply[0],
							  SADB_UPDATE,
							  satype,
							  0,
							  ((struct sadb_msg*)extensions[SADB_EXT_RESERVED])->sadb_msg_seq,
							  ((struct sadb_msg*)extensions[SADB_EXT_RESERVED])->sadb_msg_pid),
			      extensions_reply)
	     && pfkey_safe_build(error = pfkey_sa_build(&extensions_reply[SADB_EXT_SA],
							SADB_EXT_SA,
							extr->tdb->tdb_said.spi,
							extr->tdb->tdb_replaywin,
							extr->tdb->tdb_state,
							extr->tdb->tdb_authalg,
							extr->tdb->tdb_encalg,
							extr->tdb->tdb_flags),
				 extensions_reply)
	     /* The 3 lifetime extentions should only be sent if non-zero. */
	     && (extensions[SADB_EXT_LIFETIME_HARD]
		 ? pfkey_safe_build(error = pfkey_lifetime_build(&extensions_reply[SADB_EXT_LIFETIME_HARD],
								 SADB_EXT_LIFETIME_HARD,
								 extr->tdb->ips_life.ipl_allocations.ipl_hard,
								 extr->tdb->ips_life.ipl_bytes.ipl_hard,
								 extr->tdb->ips_life.ipl_addtime.ipl_hard,
								 extr->tdb->ips_life.ipl_usetime.ipl_hard,
								 extr->tdb->ips_life.ipl_packets.ipl_hard),
				    extensions_reply) : 1)
	     && (extensions[SADB_EXT_LIFETIME_SOFT]
		 ? pfkey_safe_build(error = pfkey_lifetime_build(&extensions_reply[SADB_EXT_LIFETIME_SOFT],
								 SADB_EXT_LIFETIME_SOFT,
								 extr->tdb->ips_life.ipl_allocations.ipl_count,
								 extr->tdb->ips_life.ipl_bytes.ipl_count,
								 extr->tdb->ips_life.ipl_addtime.ipl_count,
								 extr->tdb->ips_life.ipl_usetime.ipl_count,
								 extr->tdb->ips_life.ipl_packets.ipl_count),
				    extensions_reply) : 1)
	     && (extr->tdb->ips_life.ipl_allocations.ipl_count
		 || extr->tdb->ips_life.ipl_bytes.ipl_count
		 || extr->tdb->ips_life.ipl_addtime.ipl_count
		 || extr->tdb->ips_life.ipl_usetime.ipl_count
		 || extr->tdb->ips_life.ipl_packets.ipl_count

		 ? pfkey_safe_build(error = pfkey_lifetime_build(&extensions_reply[SADB_EXT_LIFETIME_CURRENT],
								 SADB_EXT_LIFETIME_CURRENT,
								 extr->tdb->ips_life.ipl_allocations.ipl_count,
								 extr->tdb->ips_life.ipl_bytes.ipl_count,
								 extr->tdb->ips_life.ipl_addtime.ipl_count,
								 extr->tdb->ips_life.ipl_usetime.ipl_count,
								 extr->tdb->ips_life.ipl_packets.ipl_count),
				    extensions_reply) : 1)
	     && pfkey_safe_build(error = pfkey_address_build(&extensions_reply[SADB_EXT_ADDRESS_SRC],
							     SADB_EXT_ADDRESS_SRC,
							     0, /*extr->tdb->tdb_said.proto,*/
							     0,
							     extr->tdb->tdb_addr_s),
				 extensions_reply)
	     && pfkey_safe_build(error = pfkey_address_build(&extensions_reply[SADB_EXT_ADDRESS_DST],
							     SADB_EXT_ADDRESS_DST,
							     0, /*extr->tdb->tdb_said.proto,*/
							     0,
							     extr->tdb->tdb_addr_d),
				 extensions_reply)
	     && (extr->tdb->tdb_ident_s.data
                 ? pfkey_safe_build(error = pfkey_ident_build(&extensions_reply[SADB_EXT_IDENTITY_SRC],
                                                              SADB_EXT_IDENTITY_SRC,
							      extr->tdb->tdb_ident_s.type,
							      extr->tdb->tdb_ident_s.id,
                                                              extr->tdb->tdb_ident_s.len,
							      extr->tdb->tdb_ident_s.data),
                                    extensions_reply) : 1)
	     && (extr->tdb->tdb_ident_d.data
                 ? pfkey_safe_build(error = pfkey_ident_build(&extensions_reply[SADB_EXT_IDENTITY_DST],
                                                              SADB_EXT_IDENTITY_DST,
							      extr->tdb->tdb_ident_d.type,
							      extr->tdb->tdb_ident_d.id,
                                                              extr->tdb->tdb_ident_d.len,
							      extr->tdb->tdb_ident_d.data),
                                    extensions_reply) : 1)
#if 0
	     /* FIXME: This won't work yet because I have not finished
		it. */
	     && (extr->tdb->tdb_sens_
		 ? pfkey_safe_build(error = pfkey_sens_build(&extensions_reply[SADB_EXT_SENSITIVITY],
							     extr->tdb->tdb_sens_dpd,
							     extr->tdb->tdb_sens_sens_level,
							     extr->tdb->tdb_sens_sens_len,
							     extr->tdb->tdb_sens_sens_bitmap,
							     extr->tdb->tdb_sens_integ_level,
							     extr->tdb->tdb_sens_integ_len,
							     extr->tdb->tdb_sens_integ_bitmap),
				    extensions_reply) : 1)
#endif
		)) {
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_update_parse: "
			    "failed to build the update reply message extensions\n");
		SENDERR(-error);
	}
		
	if((error = pfkey_msg_build(&pfkey_reply, extensions_reply, EXT_BITS_OUT))) {
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_update_parse: "
			    "failed to build the update reply message\n");
		SENDERR(-error);
	}
	for(pfkey_socketsp = pfkey_open_sockets;
	    pfkey_socketsp;
	    pfkey_socketsp = pfkey_socketsp->next) {
		if((error = pfkey_upmsg(pfkey_socketsp->socketp, pfkey_reply))) {
			KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_update_parse: "
				    "sending up update reply message for satype=%d(%s) to socket=%p failed with error=%d.\n",
				    satype,
				    satype2name(satype),
				    pfkey_socketsp->socketp,
				    error);
			SENDERR(-error);
		}
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_update_parse: "
			    "sending up update reply message for satype=%d(%s) to socket=%p succeeded.\n",
			    satype,
			    satype2name(satype),
			    pfkey_socketsp->socketp);
	}

#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
        if (nat_t_tdb_saved) {
                /**
                 * As we _really_ update existing SA, we keep tdbq and need to delete
                 * parsed tdb (nat_t_tdb_saved, was extr->tdb).
                 *
                 * goto errlab with extr->tdb = nat_t_tdb_saved will free it.
                 */

                extr->tdb = nat_t_tdb_saved;

                error = 0;
                KLIPS_PRINT(debug_pfkey,
                    "klips_debug:pfkey_update_parse (NAT-T ports): "
                    "successful for SA: %s\n",
                    sa_len ? sa : " (error)");

                goto errlab;
        }
#endif

	if((error = ipsec_sa_put(extr->tdb))) {
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_update_parse: "
			    "failed to update the mature SA=%s with error=%d.\n",
			    sa_len ? sa : " (error)",
			    error);
		SENDERR(-error);
	}
	extr->tdb = NULL;
	
	KLIPS_PRINT(debug_pfkey,
		    "klips_debug:pfkey_update_parse: "
		    "successful for SA: %s\n",
		    sa_len ? sa : " (error)");
	
 errlab:
	if (pfkey_reply) {
		pfkey_msg_free(&pfkey_reply);
	}
	pfkey_extensions_free(extensions_reply);
	return error;
}

DEBUG_NO_STATIC int
pfkey_add_parse(struct sock *sk, struct sadb_ext **extensions, struct pfkey_extracted_data* extr)
{
	int error = 0;
	struct ipsec_sa* tdbq;
	char sa[SATOA_BUF];
	size_t sa_len;
	struct sadb_ext *extensions_reply[SADB_EXT_MAX+1];
	struct sadb_msg *pfkey_reply = NULL;
	struct socket_list *pfkey_socketsp;
	uint8_t satype = ((struct sadb_msg*)extensions[SADB_EXT_RESERVED])->sadb_msg_satype;

	KLIPS_PRINT(debug_pfkey,
		    "klips_debug:pfkey_add_parse: .\n");

	pfkey_extensions_init(extensions_reply);

	if(((struct sadb_sa*)extensions[SADB_EXT_SA])->sadb_sa_state != SADB_SASTATE_MATURE) {
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_add_parse: "
			    "error, sa_state=%d must be MATURE=%d\n",
			    ((struct sadb_sa*)extensions[SADB_EXT_SA])->sadb_sa_state,
			    SADB_SASTATE_MATURE);
		SENDERR(EINVAL);
	}

	if(!extr || !extr->tdb) {
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_add_parse: "
			    "extr or extr->tdb pointer NULL\n");
		SENDERR(EINVAL);
	}

	sa_len = satoa(extr->tdb->tdb_said, 0, sa, SATOA_BUF);

	tdbq = ipsec_sa_getbyid(&(extr->tdb->tdb_said));
	if (tdbq) {
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_add_parse: "
			    "found an old Tunnel Descriptor Block for SA%s, delete it first.\n",
			    sa_len ? sa : " (error)");
		SENDERR(EEXIST);
	}

	if(ip_chk_addr((unsigned long)extr->tdb->tdb_said.dst.s_addr) == IS_MYADDR) {
		extr->tdb->tdb_flags |= EMT_INBOUND;
	}

	KLIPS_PRINT(debug_pfkey,
		    "klips_debug:pfkey_add_parse: "
		    "existing Tunnel Descriptor Block not found (this is good) for SA%s, %s-bound, allocating.\n",
		    sa_len ? sa : " (error)",
		    extr->tdb->tdb_flags & EMT_INBOUND ? "in" : "out");
	
	/* XXX extr->tdb->tdb_rcvif = &(enc_softc[em->em_if].enc_if);*/
	extr->tdb->tdb_rcvif = NULL;
	
	if ((error = pfkey_ipsec_sa_init(extr->tdb, extensions))) {
		KLIPS_PRINT(debug_pfkey,
			    "klips_debug:pfkey_add_parse: "
			    "not successful for SA: %s, deleting.\n",
			    sa_len ? sa : " (error)");
		SENDERR(-error);
	}

	extr->tdb->ips_life.ipl_addtime.ipl_count = jiffies / HZ;
	if(!extr->tdb->ips_life.ipl_allocations.ipl_count) {
		extr->tdb->ips_life.ipl_allocations.ipl_count += 1;
	}

	if(!(pfkey_safe_build(error = pfkey_msg_hdr_build(&extensions_reply[0],
							  SADB_ADD,
							  satype,
							  0,
							  ((struct sadb_msg*)extensions[SADB_EXT_RESERVED])->sadb_msg_seq,
							  ((struct sadb_msg*)extensions[SADB_EXT_RESERVED])->sadb_msg_pid),
			      extensions_reply)
	     && pfkey_safe_build(error = pfkey_sa_build(&extensions_reply[SADB_EXT_SA],
							SADB_EXT_SA,
							extr->tdb->tdb_said.spi,
							extr->tdb->tdb_replaywin,
							extr->tdb->tdb_state,
							extr->tdb->tdb_authalg,
							extr->tdb->tdb_encalg,
							extr->tdb->tdb_flags),
				 extensions_reply)
	     /* The 3 lifetime extentions should only be sent if non-zero. */
	     && (extensions[SADB_EXT_LIFETIME_HARD]
		 ? pfkey_safe_build(error = pfkey_lifetime_build(&extensions_reply[SADB_EXT_LIFETIME_HARD],
								 SADB_EXT_LIFETIME_HARD,
								 extr->tdb->ips_life.ipl_allocations.ipl_hard,
								 extr->tdb->ips_life.ipl_bytes.ipl_hard,
								 extr->tdb->ips_life.ipl_addtime.ipl_hard,
								 extr->tdb->ips_life.ipl_usetime.ipl_hard,
								 extr->tdb->ips_life.ipl_packets.ipl_hard),
				    extensions_reply) : 1)
	     && (extensions[SADB_EXT_LIFETIME_SOFT]
		 ? pfkey_safe_build(error = pfkey_lifetime_build(&extensions_reply[SADB_EXT_LIFETIME_SOFT],
								 SADB_EXT_LIFETIME_SOFT,
								 extr->tdb->ips_life.ipl_allocations.ipl_soft,
								 extr->tdb->ips_life.ipl_bytes.ipl_soft,
								 extr->tdb->ips_life.ipl_addtime.ipl_soft,
								 extr->tdb->ips_life.ipl_usetime.ipl_soft,
								 extr->tdb->ips_life.ipl_packets.ipl_soft),
				    extensions_reply) : 1)
	     && pfkey_safe_build(error = pfkey_address_build(&extensions_reply[SADB_EXT_ADDRESS_SRC],
							     SADB_EXT_ADDRESS_SRC,
							     0, /*extr->tdb->tdb_said.proto,*/
							     0,
							     extr->tdb->tdb_addr_s),
				 extensions_reply)
	     && pfkey_safe_build(error = pfkey_address_build(&extensions_reply[SADB_EXT_ADDRESS_DST],
							     SADB_EXT_ADDRESS_DST,
							     0, /*extr->tdb->tdb_said.proto,*/
							     0,
							     extr->tdb->tdb_addr_d),
				 extensions_reply)
            && (extr->tdb->tdb_ident_s.data
                 ? pfkey_safe_build(error = pfkey_ident_build(&extensions_reply[SADB_EXT_IDENTITY_SRC],
                                                              SADB_EXT_IDENTITY_SRC,
							      extr->tdb->tdb_ident_s.type,
							      extr->tdb->tdb_ident_s.id,
                                                              extr->tdb->tdb_ident_s.len,
							      extr->tdb->tdb_ident_s.data),
                                    extensions_reply) : 1)
            && (extr->tdb->tdb_ident_d.data
                 ? pfkey_safe_build(error = pfkey_ident_build(&extensions_reply[SADB_EXT_IDENTITY_DST],
                                                              SADB_EXT_IDENTITY_DST,
							      extr->tdb->tdb_ident_d.type,
							      extr->tdb->tdb_ident_d.id,
                                                              extr->tdb->tdb_ident_d.len,
							      extr->tdb->tdb_ident_d.data),
                                    extensions_reply) : 1)
#if 0
	     /* FIXME: This won't work yet because I have not finished
		it. */
	     && (extr->tdb->tdb_sens_
		 ? pfkey_safe_build(error = pfkey_sens_build(&extensions_reply[SADB_EXT_SENSITIVITY],
							     extr->tdb->tdb_sens_dpd,
							     extr->tdb->tdb_sens_sens_level,
							     extr->tdb->tdb_sens_sens_len,
							     extr->tdb->tdb_sens_sens_bitmap,
							     extr->tdb->tdb_sens_integ_level,
							     extr->tdb->tdb_sens_integ_len,
							     extr->tdb->tdb_sens_integ_bitmap),
				    extensions_reply) : 1)
#endif
		)) {
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_add_parse: "
			    "failed to build the add reply message extensions\n");
		SENDERR(-error);
	}
		
	if((error = pfkey_msg_build(&pfkey_reply, extensions_reply, EXT_BITS_OUT))) {
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_add_parse: "
			    "failed to build the add reply message\n");
		SENDERR(-error);
	}
	for(pfkey_socketsp = pfkey_open_sockets;
	    pfkey_socketsp;
	    pfkey_socketsp = pfkey_socketsp->next) {
		if((error = pfkey_upmsg(pfkey_socketsp->socketp, pfkey_reply))) {
			KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_add_parse: "
				    "sending up add reply message for satype=%d(%s) to socket=%p failed with error=%d.\n",
				    satype,
				    satype2name(satype),
				    pfkey_socketsp->socketp,
				    error);
			SENDERR(-error);
		}
		KLIPS_PRINT(debug_pfkey, "klips_debug:pfkey_add_parse: "
			    "sending up add reply message for satype=%d(%s) to socket=%p succeeded.\n",
			    satype,
			    satype2name(satype),
			    pfkey_socketsp->socketp);
	}

	if((error = ipsec_sa_put(extr->tdb))) {
		KLIPS_PR