X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ca9a02c55e08560876cc318a7fdfcab9ce146eac..d6aacc676d8540f31d1df72b12b43fc9cde93df6:/print-isoclns.c diff --git a/print-isoclns.c b/print-isoclns.c index 6f113fee..08be550d 100644 --- a/print-isoclns.c +++ b/print-isoclns.c @@ -24,16 +24,15 @@ * complete IS-IS & CLNP support. */ -#define NETDISSECT_REWORKED #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include #include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" #include "ether.h" #include "nlpid.h" @@ -42,6 +41,8 @@ #include "oui.h" #include "signature.h" +static const char tstr[] = " [|isis]"; + /* * IS-IS is defined in ISO 10589. Look there for protocol definitions. */ @@ -103,6 +104,7 @@ static const struct tok isis_pdu_values[] = { #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ #define ISIS_TLV_CHECKSUM_MINLEN 2 +#define ISIS_TLV_POI 13 /* rfc6232 */ #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ @@ -152,6 +154,7 @@ static const struct tok isis_tlv_values[] = { { ISIS_TLV_LSP, "LSP entries"}, { ISIS_TLV_AUTH, "Authentication"}, { ISIS_TLV_CHECKSUM, "Checksum"}, + { ISIS_TLV_POI, "Purge Originator Identifier"}, { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, @@ -559,8 +562,8 @@ struct isis_tlv_ptp_adj { uint8_t neighbor_extd_local_circuit_id[4]; }; -static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, uint16_t checksum, - u_int checksum_offset, u_int length); +static int osi_print_cksum(netdissect_options *, const uint8_t *pptr, + uint16_t checksum, int checksum_offset, int length); static int clnp_print(netdissect_options *, const uint8_t *, u_int); static void esis_print(netdissect_options *, const uint8_t *, u_int); static int isis_print(netdissect_options *, const uint8_t *, u_int); @@ -664,8 +667,9 @@ struct isis_tlv_lsp { #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) -void isoclns_print(netdissect_options *ndo, - const uint8_t *p, u_int length, u_int caplen) +void +isoclns_print(netdissect_options *ndo, + const uint8_t *p, u_int length, u_int caplen) { if (caplen <= 1) { /* enough bytes on the wire ? */ ND_PRINT((ndo, "|OSI")); @@ -806,8 +810,8 @@ clnp_print(netdissect_options *ndo, if (ndo->ndo_vflag < 1) { ND_PRINT((ndo, "%s%s > %s, %s, length %u", ndo->ndo_eflag ? "" : ", ", - isonsap_string(source_address, source_address_length), - isonsap_string(dest_address, dest_address_length), + isonsap_string(ndo, source_address, source_address_length), + isonsap_string(ndo, dest_address, dest_address_length), tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), length)); return (1); @@ -823,17 +827,18 @@ clnp_print(netdissect_options *ndo, EXTRACT_16BITS(clnp_header->segment_length), EXTRACT_16BITS(clnp_header->cksum))); - osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7, - clnp_header->length_indicator); + if (osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7, + clnp_header->length_indicator) == 0) + goto trunc; ND_PRINT((ndo, "\n\tFlags [%s]", bittok2str(clnp_flag_values, "none", clnp_flags))); ND_PRINT((ndo, "\n\tsource address (length %u): %s\n\tdest address (length %u): %s", source_address_length, - isonsap_string(source_address, source_address_length), + isonsap_string(ndo, source_address, source_address_length), dest_address_length, - isonsap_string(dest_address, dest_address_length))); + isonsap_string(ndo, dest_address, dest_address_length))); if (clnp_flags & CLNP_SEGMENT_PART) { clnp_segment_header = (const struct clnp_segment_header_t *) pptr; @@ -904,7 +909,7 @@ clnp_print(netdissect_options *ndo, ND_TCHECK2(*source_address, source_address_length); ND_PRINT((ndo, "\n\t NSAP address (length %u): %s", source_address_length, - isonsap_string(source_address, source_address_length))); + isonsap_string(ndo, source_address, source_address_length))); } tlen-=source_address_length+1; } @@ -1078,7 +1083,8 @@ esis_print(netdissect_options *ndo, ND_PRINT((ndo, ", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" )); ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum))); - osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); + if (osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li) == 0) + goto trunc; ND_PRINT((ndo, ", holding time: %us, length indicator: %u", EXTRACT_16BITS(esis_header->holdtime), li)); @@ -1110,7 +1116,7 @@ esis_print(netdissect_options *ndo, dst = pptr; pptr += dstl; li -= dstl; - ND_PRINT((ndo, "\n\t %s", isonsap_string(dst, dstl))); + ND_PRINT((ndo, "\n\t %s", isonsap_string(ndo, dst, dstl))); ND_TCHECK(*pptr); if (li < 1) { @@ -1147,7 +1153,7 @@ esis_print(netdissect_options *ndo, if (netal == 0) ND_PRINT((ndo, "\n\t %s", etheraddr_string(ndo, snpa))); else - ND_PRINT((ndo, "\n\t %s", isonsap_string(neta, netal))); + ND_PRINT((ndo, "\n\t %s", isonsap_string(ndo, neta, netal))); break; } @@ -1180,7 +1186,7 @@ esis_print(netdissect_options *ndo, } ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, - isonsap_string(pptr, source_address_length))); + isonsap_string(ndo, pptr, source_address_length))); pptr += source_address_length; li -= source_address_length; source_address_number--; @@ -1202,7 +1208,7 @@ esis_print(netdissect_options *ndo, ND_PRINT((ndo, ", bad ish/li")); return; } - ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length))); + ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length))); pptr += source_address_length; li -= source_address_length; break; @@ -1295,14 +1301,11 @@ isis_print_mcid(netdissect_options *ndo, { int i; + ND_TCHECK(*mcid); ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id)); - for(i=0; i<32; i++) - { - ND_PRINT((ndo, "%c", mcid->name[i])); - if(mcid->name[i] == '\0') - break; - } + if (fn_printzp(ndo, mcid->name, 32, ndo->ndo_snapend)) + goto trunc; ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl))); @@ -1310,6 +1313,9 @@ isis_print_mcid(netdissect_options *ndo, for(i=0;i<16;i++) ND_PRINT((ndo, "%.2x ", mcid->digest[i])); + +trunc: + ND_PRINT((ndo, "%s", tstr)); } static int @@ -1320,7 +1326,7 @@ isis_print_mt_port_cap_subtlv(netdissect_options *ndo, const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; int i; - while (len > 0) + while (len > 2) { stlv_type = *(tptr++); stlv_len = *(tptr++); @@ -1341,7 +1347,7 @@ isis_print_mt_port_cap_subtlv(netdissect_options *ndo, if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN)) goto trunctlv; - subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr; + subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr; ND_PRINT((ndo, "\n\t MCID: ")); isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid)); @@ -1391,7 +1397,7 @@ isis_print_mt_port_cap_subtlv(netdissect_options *ndo, if (!ND_TTEST2(*(tptr), stlv_len)) goto trunctlv; - while (len) + while (len >= ISIS_SUBTLV_SPB_BVID_MIN_LEN) { if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN)) goto trunctlv; @@ -1421,7 +1427,8 @@ isis_print_mt_port_cap_subtlv(netdissect_options *ndo, return 0; trunctlv: - ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); + ND_PRINT((ndo, "\n\t\t")); + ND_PRINT((ndo, "%s", tstr)); return(1); } @@ -1431,7 +1438,7 @@ isis_print_mt_capability_subtlv(netdissect_options *ndo, { int stlv_type, stlv_len, tmp; - while (len > 0) + while (len > 2) { stlv_type = *(tptr++); stlv_len = *(tptr++); @@ -1448,8 +1455,7 @@ isis_print_mt_capability_subtlv(netdissect_options *ndo, { case ISIS_SUBTLV_SPB_INSTANCE: - if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)) - goto trunctlv; + ND_TCHECK2(*tptr, ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN); ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr))); tptr = tptr+4; @@ -1474,8 +1480,7 @@ isis_print_mt_capability_subtlv(netdissect_options *ndo, while (tmp) { - if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)) - goto trunctlv; + ND_TCHECK2(*tptr, ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN); ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d", *(tptr) >> 7, (*(tptr) >> 6) & 0x01, @@ -1500,8 +1505,7 @@ isis_print_mt_capability_subtlv(netdissect_options *ndo, case ISIS_SUBTLV_SPBM_SI: - if (!ND_TTEST2(*(tptr), 6)) - goto trunctlv; + ND_TCHECK2(*tptr, 8); ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr))); tptr = tptr+4; @@ -1515,8 +1519,8 @@ isis_print_mt_capability_subtlv(netdissect_options *ndo, len = len - 8; stlv_len = stlv_len - 8; - while (stlv_len) - { + while (stlv_len >= 4) { + ND_TCHECK2(*tptr, 4); ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d", (EXTRACT_32BITS(tptr) >> 31), (EXTRACT_32BITS(tptr) >> 30) & 0x01, @@ -1536,8 +1540,9 @@ isis_print_mt_capability_subtlv(netdissect_options *ndo, } return 0; - trunctlv: - ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); + trunc: + ND_PRINT((ndo, "\n\t\t")); + ND_PRINT((ndo, "%s", tstr)); return(1); } @@ -1696,7 +1701,8 @@ isis_print_ip_reach_subtlv(netdissect_options *ndo, return(1); trunctlv: - ND_PRINT((ndo, "%spacket exceeded snapshot", ident)); + ND_PRINT((ndo, "%s", ident)); + ND_PRINT((ndo, "%s", tstr)); return(0); } @@ -1721,8 +1727,7 @@ isis_print_is_reach_subtlv(netdissect_options *ndo, ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt), subt, subl)); - if (!ND_TTEST2(*tptr,subl)) - goto trunctlv; + ND_TCHECK2(*tptr, subl); switch(subt) { case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: @@ -1767,6 +1772,7 @@ isis_print_is_reach_subtlv(netdissect_options *ndo, tptr++; /* decode BCs until the subTLV ends */ for (te_class = 0; te_class < (subl-1)/4; te_class++) { + ND_TCHECK2(*tptr, 4); bw.i = EXTRACT_32BITS(tptr); ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps", ident, @@ -1828,11 +1834,13 @@ isis_print_is_reach_subtlv(netdissect_options *ndo, case GMPLS_PSC2: case GMPLS_PSC3: case GMPLS_PSC4: + ND_TCHECK2(*tptr, 6); bw.i = EXTRACT_32BITS(tptr); ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000)); ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4))); break; case GMPLS_TSC: + ND_TCHECK2(*tptr, 8); bw.i = EXTRACT_32BITS(tptr); ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000)); ND_PRINT((ndo, "%s Indication %s", ident, @@ -1855,12 +1863,10 @@ isis_print_is_reach_subtlv(netdissect_options *ndo, } return(1); -trunctlv: - ND_PRINT((ndo, "%spacket exceeded snapshot", ident)); +trunc: return(0); } - /* * this is the common IS-REACH decoder it is called * from various EXTD-IS REACH style TLVs (22,24,222) @@ -1899,7 +1905,7 @@ isis_print_ext_is_reach(netdissect_options *ndo, return(0); subtlv_type=*(tptr++); subtlv_len=*(tptr++); - /* prepend the ident string */ + /* prepend the indent string */ snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); if (!isis_print_is_reach_subtlv(ndo, tptr, subtlv_type, subtlv_len, ident_buffer)) return(0); @@ -1948,11 +1954,7 @@ isis_print_extd_ip_reach(netdissect_options *ndo, const uint8_t *tptr, const char *ident, uint16_t afi) { char ident_buffer[20]; -#ifdef INET6 uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ -#else - uint8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ -#endif u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; if (!ND_TTEST2(*tptr, 4)) @@ -1973,7 +1975,6 @@ isis_print_extd_ip_reach(netdissect_options *ndo, return (0); } processed++; -#ifdef INET6 } else if (afi == AF_INET6) { if (!ND_TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ return (0); @@ -1986,7 +1987,6 @@ isis_print_extd_ip_reach(netdissect_options *ndo, return (0); } processed+=2; -#endif } else return (0); /* somebody is fooling us */ @@ -2004,13 +2004,11 @@ isis_print_extd_ip_reach(netdissect_options *ndo, ident, ipaddr_string(ndo, prefix), bit_length)); -#ifdef INET6 - if (afi == AF_INET6) + else if (afi == AF_INET6) ND_PRINT((ndo, "%sIPv6 prefix: %s/%u", ident, ip6addr_string(ndo, prefix), bit_length)); -#endif ND_PRINT((ndo, ", Distribution: %s, Metric: %u", ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", @@ -2018,17 +2016,13 @@ isis_print_extd_ip_reach(netdissect_options *ndo, if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) ND_PRINT((ndo, ", sub-TLVs present")); -#ifdef INET6 - if (afi == AF_INET6) + else if (afi == AF_INET6) ND_PRINT((ndo, ", %s%s", ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "")); -#endif if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) -#ifdef INET6 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) -#endif ) { /* assume that one prefix can hold more than one subTLV - therefore the first byte must reflect @@ -2045,7 +2039,7 @@ isis_print_extd_ip_reach(netdissect_options *ndo, return (0); subtlvtype=*(tptr++); subtlvlen=*(tptr++); - /* prepend the ident string */ + /* prepend the indent string */ snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer)) return(0); @@ -2172,6 +2166,7 @@ isis_print(netdissect_options *ndo, case ISIS_PDU_L1_LAN_IIH: case ISIS_PDU_L2_LAN_IIH: + ND_TCHECK(*header_iih_lan); ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN))); ND_PRINT((ndo, ", lan-id %s, prio %u", @@ -2179,10 +2174,12 @@ isis_print(netdissect_options *ndo, header_iih_lan->priority)); break; case ISIS_PDU_PTP_IIH: + ND_TCHECK(*header_iih_ptp); ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN))); break; case ISIS_PDU_L1_LSP: case ISIS_PDU_L2_LSP: + ND_TCHECK(*header_lsp); ND_PRINT((ndo, ", lsp-id %s, seq 0x%08x, lifetime %5us", isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), EXTRACT_32BITS(header_lsp->sequence_number), @@ -2190,10 +2187,12 @@ isis_print(netdissect_options *ndo, break; case ISIS_PDU_L1_CSNP: case ISIS_PDU_L2_CSNP: + ND_TCHECK(*header_csnp); ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN))); break; case ISIS_PDU_L1_PSNP: case ISIS_PDU_L2_PSNP: + ND_TCHECK(*header_psnp); ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN))); break; @@ -2233,13 +2232,13 @@ isis_print(netdissect_options *ndo, return (0); } + ND_TCHECK(*header_iih_lan); pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); if (packet_len>pdu_len) { packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ length=pdu_len; } - ND_TCHECK(*header_iih_lan); ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]", isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), EXTRACT_16BITS(header_iih_lan->holding_time), @@ -2268,13 +2267,13 @@ isis_print(netdissect_options *ndo, return (0); } + ND_TCHECK(*header_iih_ptp); pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); if (packet_len>pdu_len) { packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ length=pdu_len; } - ND_TCHECK(*header_iih_ptp); ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), EXTRACT_16BITS(header_iih_ptp->holding_time), @@ -2303,22 +2302,23 @@ isis_print(netdissect_options *ndo, return (0); } + ND_TCHECK(*header_lsp); pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); if (packet_len>pdu_len) { packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ length=pdu_len; } - ND_TCHECK(*header_lsp); ND_PRINT((ndo, "\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), EXTRACT_32BITS(header_lsp->sequence_number), EXTRACT_16BITS(header_lsp->remaining_lifetime), EXTRACT_16BITS(header_lsp->checksum))); - - osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id, - EXTRACT_16BITS(header_lsp->checksum), 12, length-12); + if (osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id, + EXTRACT_16BITS(header_lsp->checksum), + 12, length-12) == 0) + goto trunc; /* * Clear checksum and lifetime prior to signature verification. @@ -2328,7 +2328,6 @@ isis_print(netdissect_options *ndo, header_lsp->remaining_lifetime[0] = 0; header_lsp->remaining_lifetime[1] = 0; - ND_PRINT((ndo, ", PDU length: %u, Flags: [ %s", pdu_len, ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "")); @@ -2361,13 +2360,13 @@ isis_print(netdissect_options *ndo, return (0); } + ND_TCHECK(*header_csnp); pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); if (packet_len>pdu_len) { packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ length=pdu_len; } - ND_TCHECK(*header_csnp); ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u", isis_print_id(header_csnp->source_id, NODE_ID_LEN), pdu_len)); @@ -2393,13 +2392,13 @@ isis_print(netdissect_options *ndo, return (0); } + ND_TCHECK(*header_psnp); pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); if (packet_len>pdu_len) { packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ length=pdu_len; } - ND_TCHECK(*header_psnp); ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u", isis_print_id(header_psnp->source_id, NODE_ID_LEN), pdu_len)); @@ -2427,11 +2426,7 @@ isis_print(netdissect_options *ndo, return (1); } - if (!ND_TTEST2(*pptr, 2)) { - ND_PRINT((ndo, "\n\t\t packet exceeded snapshot (%ld) bytes", - (long)(pptr - ndo->ndo_snapend))); - return (1); - } + ND_TCHECK2(*pptr, 2); tlv_type = *pptr++; tlv_len = *pptr++; tmp =tlv_len; /* copy temporary len & pointer to packet data */ @@ -2449,7 +2444,7 @@ isis_print(netdissect_options *ndo, tlv_type, tlv_len)); - if (tlv_len == 0) /* something is malformed */ + if (tlv_len == 0) /* something is invalid */ continue; /* now check if we have a decoder otherwise do a hexdump at the end*/ @@ -2461,7 +2456,7 @@ isis_print(netdissect_options *ndo, while (tmp && alen < tmp) { ND_PRINT((ndo, "\n\t Area address (length: %u): %s", alen, - isonsap_string(tptr, alen))); + isonsap_string(ndo, tptr, alen))); tptr += alen; tmp -= alen + 1; if (tmp==0) /* if this is the last area address do not attemt a boundary check */ @@ -2604,7 +2599,6 @@ isis_print(netdissect_options *ndo, } break; -#ifdef INET6 case ISIS_TLV_IP6_REACH: while (tmp>0) { ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6); @@ -2644,7 +2638,6 @@ isis_print(netdissect_options *ndo, tmp -= sizeof(struct in6_addr); } break; -#endif case ISIS_TLV_AUTH: if (!ND_TTEST2(*tptr, 1)) goto trunctlv; @@ -2656,11 +2649,8 @@ isis_print(netdissect_options *ndo, switch (*tptr) { case ISIS_SUBTLV_AUTH_SIMPLE: - for(i=1;indo_snapend)) + goto trunctlv; break; case ISIS_SUBTLV_AUTH_MD5: for(i=1;i0) { - if (!ND_TTEST2(*tptr, 1)) - goto trunctlv; - ND_PRINT((ndo, "%c", *tptr++)); - tmp--; - } + if (fn_printzp(ndo, tptr, tmp, ndo->ndo_snapend)) + goto trunctlv; break; case ISIS_TLV_SHARED_RISK_GROUP: @@ -2883,7 +2870,25 @@ isis_print(netdissect_options *ndo, * to avoid conflicts the checksum TLV is zeroed. * see rfc3358 for details */ - osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, length); + if (osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, + length) == 0) + goto trunc; + break; + + case ISIS_TLV_POI: + if (tlv_len >= SYSTEM_ID_LEN + 1) { + if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN + 1)) + goto trunctlv; + ND_PRINT((ndo, "\n\t Purge Originator System-ID: %s", + isis_print_id(tptr + 1, SYSTEM_ID_LEN))); + } + + if (tlv_len == 2 * SYSTEM_ID_LEN + 1) { + if (!ND_TTEST2(*tptr, 2 * SYSTEM_ID_LEN + 1)) + goto trunctlv; + ND_PRINT((ndo, "\n\t Received from System-ID: %s", + isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN))); + } break; case ISIS_TLV_MT_SUPPORTED: @@ -2899,7 +2904,7 @@ isis_print(netdissect_options *ndo, tptr+=mt_len; tmp-=mt_len; } else { - ND_PRINT((ndo, "\n\t malformed MT-ID")); + ND_PRINT((ndo, "\n\t invalid MT-ID")); break; } } @@ -3003,7 +3008,7 @@ isis_print(netdissect_options *ndo, if (!ND_TTEST2(*tptr, prefix_len / 2)) goto trunctlv; ND_PRINT((ndo, "\n\t\tAddress: %s/%u", - isonsap_string(tptr, prefix_len / 2), prefix_len * 4)); + isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4)); tptr+=prefix_len/2; tmp-=prefix_len/2; } @@ -3066,18 +3071,18 @@ isis_print(netdissect_options *ndo, return (1); trunc: - ND_PRINT((ndo, "[|isis]")); + ND_PRINT((ndo, "%s", tstr)); return (1); trunctlv: - ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); + ND_PRINT((ndo, "\n\t\t")); + ND_PRINT((ndo, "%s", tstr)); return(1); } -static void -osi_print_cksum(netdissect_options *ndo, - const uint8_t *pptr, uint16_t checksum, - u_int checksum_offset, u_int length) +static int +osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr, + uint16_t checksum, int checksum_offset, int length) { uint16_t calculated_checksum; @@ -3087,23 +3092,28 @@ osi_print_cksum(netdissect_options *ndo, * or the base pointer is not sane */ if (!checksum + || length < 0 + || checksum_offset < 0 || length > ndo->ndo_snaplen || checksum_offset > ndo->ndo_snaplen || checksum_offset > length) { ND_PRINT((ndo, " (unverified)")); + return 1; } else { - const char *truncated = "trunc"; - //printf("\nosi_print_cksum: %p %u %u %u\n", pptr, checksum_offset, length, ndo->ndo_snaplen); - //ND_TCHECK2(pptr, checksum_offset+length); +#if 0 + printf("\nosi_print_cksum: %p %u %u %u\n", pptr, checksum_offset, length, ndo->ndo_snaplen); +#endif + ND_TCHECK2(*pptr, length); calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); if (checksum == calculated_checksum) { ND_PRINT((ndo, " (correct)")); } else { - truncated = "incorrect"; - //trunc: - ND_PRINT((ndo, " (%s should be 0x%04x)", truncated, calculated_checksum)); + ND_PRINT((ndo, " (incorrect should be 0x%04x)", calculated_checksum)); } + return 1; } +trunc: + return 0; } /*