print-bgp.c

来自「TCPDUMP的C语言源代码,是在数据链路层的应用」· C语言 代码 · 共 1,792 行 · 第 1/5 页

                            break;
                        case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
                        case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
                        case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
                            if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
                                printf("invalid len");
                                tlen = 0;
                            } else {
                                TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
                                printf("RD: %s, %s",
                                       bgp_vpn_rd_print(tptr),
                                       getname6(tptr+BGP_VPN_RD_LEN));
                                tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
                                tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
                            }
                            break;
#endif
                        case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
                        case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
                        case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
                        case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
                            if (tlen < (int)sizeof(struct in_addr)) {
                                printf("invalid len");
                                tlen = 0;
                            } else {
                                TCHECK2(tptr[0], sizeof(struct in_addr));
                                printf("%s", getname(tptr));
                                tlen -= (sizeof(struct in_addr));
                                tptr += (sizeof(struct in_addr));
                            }
                            break;
                        case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
                        case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
                        case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
                            TCHECK2(tptr[0], tlen);
                            printf("%s",isonsap_string(tptr,tlen));
                            tptr += tlen;
                            tlen = 0;
                            break;

                        case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
                        case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
                        case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
                            if (tlen < BGP_VPN_RD_LEN+1) {
                                printf("invalid len");
                                tlen = 0;
                            } else {
                                TCHECK2(tptr[0], tlen);
                                printf("RD: %s, %s",
                                       bgp_vpn_rd_print(tptr),
                                       isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
                                /* rfc986 mapped IPv4 address ? */
                                if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) ==  0x47000601)
                                    printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
#ifdef INET6
                                /* rfc1888 mapped IPv6 address ? */
                                else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) ==  0x350000)
                                    printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
#endif
                                tptr += tlen;
                                tlen = 0;
                            }
                            break;
                        default:
                            TCHECK2(tptr[0], tlen);
                            printf("no AFI %u/SAFI %u decoder",af,safi);
                            if (vflag <= 1)
                                print_unknown_data(tptr,"\n\t    ",tlen);
                            tptr += tlen;
                            tlen = 0;
                            goto done;
                            break;
                        }
                    }
		}
                printf(", nh-length: %u", nhlen);
		tptr += tlen;

		TCHECK(tptr[0]);
		snpa = tptr[0];
		tptr++;

		if (snpa) {
			printf("\n\t    %u SNPA", snpa);
			for (/*nothing*/; snpa > 0; snpa--) {
				TCHECK(tptr[0]);
				printf("\n\t      %d bytes", tptr[0]);
				tptr += tptr[0] + 1;
			}
		} else {
			printf(", no SNPA");
                }

		while (len - (tptr - pptr) > 0) {
                    switch (af<<8 | safi) {
                    case (AFNUM_INET<<8 | SAFNUM_UNICAST):
                    case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
                    case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
                        advance = decode_prefix4(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
                        advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
                        advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
                    case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
                        advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
#ifdef INET6
                    case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
                        advance = decode_prefix6(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
                        advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
#endif
                    case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
                    case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);         
                        break;
                    case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
                        advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;                                   
                    default:
                        TCHECK2(*tptr,tlen);
                        printf("\n\t    no AFI %u / SAFI %u decoder",af,safi);
                        if (vflag <= 1)
                            print_unknown_data(tptr,"\n\t    ",tlen);
                        advance = 0;
                        tptr = pptr + len;
                        break;
                    }
                    if (advance < 0)
                        break;
                    tptr += advance;
		}
        done:
		break;

	case BGPTYPE_MP_UNREACH_NLRI:
		TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
		af = EXTRACT_16BITS(tptr);
		safi = tptr[2];

                printf("\n\t    AFI: %s (%u), %sSAFI: %s (%u)",
                       tok2strbuf(af_values, "Unknown AFI", af,
				  tokbuf, sizeof(tokbuf)),
                       af,
                       (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
                       tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
				  tokbuf, sizeof(tokbuf)),
                       safi);

                if (len == BGP_MP_NLRI_MINSIZE)
                    printf("\n\t      End-of-Rib Marker (empty NLRI)");

		tptr += 3;
                
		while (len - (tptr - pptr) > 0) {
                    switch (af<<8 | safi) {
                    case (AFNUM_INET<<8 | SAFNUM_UNICAST):
                    case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
                    case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
                        advance = decode_prefix4(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
                        advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
#ifdef INET6
                    case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
                        advance = decode_prefix6(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
                        advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
#endif
                    case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
                    case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);         
                        break;
                    case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
                        advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;
                    case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
                    case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
                        advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t      %s", buf);
                        break;                                   
                    case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
                    case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
                        advance = decode_multicast_vpn(tptr, buf, sizeof(buf));
                        if (advance == -1)
                            printf("\n\t    (illegal prefix length)");
                        else if (advance == -2)
                            goto trunc;
                        else
                            printf("\n\t