/* * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code * distributions retain the above copyright notice and this paragraph * in its entirety, and (2) distributions including binary code include * the above copyright notice and this paragraph in its entirety in * the documentation or other materials provided with the distribution. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * * Original code by Andy Heffernan (ahh@juniper.net) */ /* \summary: Pragmatic General Multicast (PGM) printer */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "netdissect-stdinc.h" #include "netdissect.h" #include "extract.h" #include "addrtoname.h" #include "addrtostr.h" #include "ip.h" #include "ip6.h" #include "ipproto.h" #include "af.h" /* * PGM header (RFC 3208) */ struct pgm_header { nd_uint16_t pgm_sport; nd_uint16_t pgm_dport; nd_uint8_t pgm_type; nd_uint8_t pgm_options; nd_uint16_t pgm_sum; nd_byte pgm_gsid[6]; nd_uint16_t pgm_length; }; struct pgm_spm { nd_uint32_t pgms_seq; nd_uint32_t pgms_trailseq; nd_uint32_t pgms_leadseq; nd_uint16_t pgms_nla_afi; nd_uint16_t pgms_reserved; /* ... uint8_t pgms_nla[0]; */ /* ... options */ }; struct pgm_nak { nd_uint32_t pgmn_seq; nd_uint16_t pgmn_source_afi; nd_uint16_t pgmn_reserved; /* ... uint8_t pgmn_source[0]; */ /* ... uint16_t pgmn_group_afi */ /* ... uint16_t pgmn_reserved2; */ /* ... uint8_t pgmn_group[0]; */ /* ... options */ }; struct pgm_ack { nd_uint32_t pgma_rx_max_seq; nd_uint32_t pgma_bitmap; /* ... options */ }; struct pgm_poll { nd_uint32_t pgmp_seq; nd_uint16_t pgmp_round; nd_uint16_t pgmp_reserved; /* ... options */ }; struct pgm_polr { nd_uint32_t pgmp_seq; nd_uint16_t pgmp_round; nd_uint16_t pgmp_subtype; nd_uint16_t pgmp_nla_afi; nd_uint16_t pgmp_reserved; /* ... uint8_t pgmp_nla[0]; */ /* ... options */ }; struct pgm_data { nd_uint32_t pgmd_seq; nd_uint32_t pgmd_trailseq; /* ... options */ }; typedef enum _pgm_type { PGM_SPM = 0, /* source path message */ PGM_POLL = 1, /* POLL Request */ PGM_POLR = 2, /* POLL Response */ PGM_ODATA = 4, /* original data */ PGM_RDATA = 5, /* repair data */ PGM_NAK = 8, /* NAK */ PGM_NULLNAK = 9, /* Null NAK */ PGM_NCF = 10, /* NAK Confirmation */ PGM_ACK = 11, /* ACK for congestion control */ PGM_SPMR = 12, /* SPM request */ PGM_MAX = 255 } pgm_type; #define PGM_OPT_BIT_PRESENT 0x01 #define PGM_OPT_BIT_NETWORK 0x02 #define PGM_OPT_BIT_VAR_PKTLEN 0x40 #define PGM_OPT_BIT_PARITY 0x80 #define PGM_OPT_LENGTH 0x00 #define PGM_OPT_FRAGMENT 0x01 #define PGM_OPT_NAK_LIST 0x02 #define PGM_OPT_JOIN 0x03 #define PGM_OPT_NAK_BO_IVL 0x04 #define PGM_OPT_NAK_BO_RNG 0x05 #define PGM_OPT_REDIRECT 0x07 #define PGM_OPT_PARITY_PRM 0x08 #define PGM_OPT_PARITY_GRP 0x09 #define PGM_OPT_CURR_TGSIZE 0x0A #define PGM_OPT_NBR_UNREACH 0x0B #define PGM_OPT_PATH_NLA 0x0C #define PGM_OPT_SYN 0x0D #define PGM_OPT_FIN 0x0E #define PGM_OPT_RST 0x0F #define PGM_OPT_CR 0x10 #define PGM_OPT_CRQST 0x11 #define PGM_OPT_PGMCC_DATA 0x12 #define PGM_OPT_PGMCC_FEEDBACK 0x13 #define PGM_OPT_MASK 0x7f #define PGM_OPT_END 0x80 /* end of options marker */ #define PGM_MIN_OPT_LEN 4 void pgm_print(netdissect_options *ndo, const u_char *bp, u_int length, const u_char *bp2) { const struct pgm_header *pgm; const struct ip *ip; char ch; uint8_t pgm_type_val; uint16_t sport, dport; u_int nla_afnum; char nla_buf[INET6_ADDRSTRLEN]; const struct ip6_hdr *ip6; uint8_t opt_type, opt_len; uint32_t seq, opts_len, len, offset; pgm = (const struct pgm_header *)bp; ip = (const struct ip *)bp2; if (IP_V(ip) == 6) ip6 = (const struct ip6_hdr *)bp2; else ip6 = NULL; ch = '\0'; if (!ND_TTEST_2(pgm->pgm_dport)) { if (ip6) { ND_PRINT("%s > %s: [|pgm]", ip6addr_string(ndo, &ip6->ip6_src), ip6addr_string(ndo, &ip6->ip6_dst)); } else { ND_PRINT("%s > %s: [|pgm]", ipaddr_string(ndo, &ip->ip_src), ipaddr_string(ndo, &ip->ip_dst)); } return; } sport = EXTRACT_BE_U_2(pgm->pgm_sport); dport = EXTRACT_BE_U_2(pgm->pgm_dport); if (ip6) { if (EXTRACT_U_1(ip6->ip6_nxt) == IPPROTO_PGM) { ND_PRINT("%s.%s > %s.%s: ", ip6addr_string(ndo, &ip6->ip6_src), tcpport_string(ndo, sport), ip6addr_string(ndo, &ip6->ip6_dst), tcpport_string(ndo, dport)); } else { ND_PRINT("%s > %s: ", tcpport_string(ndo, sport), tcpport_string(ndo, dport)); } } else { if (EXTRACT_U_1(ip->ip_p) == IPPROTO_PGM) { ND_PRINT("%s.%s > %s.%s: ", ipaddr_string(ndo, &ip->ip_src), tcpport_string(ndo, sport), ipaddr_string(ndo, &ip->ip_dst), tcpport_string(ndo, dport)); } else { ND_PRINT("%s > %s: ", tcpport_string(ndo, sport), tcpport_string(ndo, dport)); } } ND_TCHECK_SIZE(pgm); ND_PRINT("PGM, length %u", EXTRACT_BE_U_2(pgm->pgm_length)); if (!ndo->ndo_vflag) return; pgm_type_val = EXTRACT_U_1(pgm->pgm_type); ND_PRINT(" 0x%02x%02x%02x%02x%02x%02x ", pgm->pgm_gsid[0], pgm->pgm_gsid[1], pgm->pgm_gsid[2], pgm->pgm_gsid[3], pgm->pgm_gsid[4], pgm->pgm_gsid[5]); switch (pgm_type_val) { case PGM_SPM: { const struct pgm_spm *spm; spm = (const struct pgm_spm *)(pgm + 1); ND_TCHECK_SIZE(spm); bp = (const u_char *) (spm + 1); switch (EXTRACT_BE_U_2(spm->pgms_nla_afi)) { case AFNUM_INET: ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in_addr); break; case AFNUM_INET6: ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in6_addr); break; default: goto trunc; break; } ND_PRINT("SPM seq %u trail %u lead %u nla %s", EXTRACT_BE_U_4(spm->pgms_seq), EXTRACT_BE_U_4(spm->pgms_trailseq), EXTRACT_BE_U_4(spm->pgms_leadseq), nla_buf); break; } case PGM_POLL: { const struct pgm_poll *poll_msg; poll_msg = (const struct pgm_poll *)(pgm + 1); ND_TCHECK_SIZE(poll_msg); ND_PRINT("POLL seq %u round %u", EXTRACT_BE_U_4(poll_msg->pgmp_seq), EXTRACT_BE_U_2(poll_msg->pgmp_round)); bp = (const u_char *) (poll_msg + 1); break; } case PGM_POLR: { const struct pgm_polr *polr; uint32_t ivl, rnd, mask; polr = (const struct pgm_polr *)(pgm + 1); ND_TCHECK_SIZE(polr); bp = (const u_char *) (polr + 1); switch (EXTRACT_BE_U_2(polr->pgmp_nla_afi)) { case AFNUM_INET: ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in_addr); break; case AFNUM_INET6: ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in6_addr); break; default: goto trunc; break; } ND_TCHECK_LEN(bp, sizeof(uint32_t)); ivl = EXTRACT_BE_U_4(bp); bp += sizeof(uint32_t); ND_TCHECK_LEN(bp, sizeof(uint32_t)); rnd = EXTRACT_BE_U_4(bp); bp += sizeof(uint32_t); ND_TCHECK_LEN(bp, sizeof(uint32_t)); mask = EXTRACT_BE_U_4(bp); bp += sizeof(uint32_t); ND_PRINT("POLR seq %u round %u nla %s ivl %u rnd 0x%08x " "mask 0x%08x", EXTRACT_BE_U_4(polr->pgmp_seq), EXTRACT_BE_U_2(polr->pgmp_round), nla_buf, ivl, rnd, mask); break; } case PGM_ODATA: { const struct pgm_data *odata; odata = (const struct pgm_data *)(pgm + 1); ND_TCHECK_SIZE(odata); ND_PRINT("ODATA trail %u seq %u", EXTRACT_BE_U_4(odata->pgmd_trailseq), EXTRACT_BE_U_4(odata->pgmd_seq)); bp = (const u_char *) (odata + 1); break; } case PGM_RDATA: { const struct pgm_data *rdata; rdata = (const struct pgm_data *)(pgm + 1); ND_TCHECK_SIZE(rdata); ND_PRINT("RDATA trail %u seq %u", EXTRACT_BE_U_4(rdata->pgmd_trailseq), EXTRACT_BE_U_4(rdata->pgmd_seq)); bp = (const u_char *) (rdata + 1); break; } case PGM_NAK: case PGM_NULLNAK: case PGM_NCF: { const struct pgm_nak *nak; char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN]; nak = (const struct pgm_nak *)(pgm + 1); ND_TCHECK_SIZE(nak); bp = (const u_char *) (nak + 1); /* * Skip past the source, saving info along the way * and stopping if we don't have enough. */ switch (EXTRACT_BE_U_2(nak->pgmn_source_afi)) { case AFNUM_INET: ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, source_buf, sizeof(source_buf)); bp += sizeof(struct in_addr); break; case AFNUM_INET6: ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, source_buf, sizeof(source_buf)); bp += sizeof(struct in6_addr); break; default: goto trunc; break; } /* * Skip past the group, saving info along the way * and stopping if we don't have enough. */ bp += (2 * sizeof(uint16_t)); ND_TCHECK_2(bp); switch (EXTRACT_BE_U_2(bp)) { case AFNUM_INET: ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, group_buf, sizeof(group_buf)); bp += sizeof(struct in_addr); break; case AFNUM_INET6: ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, group_buf, sizeof(group_buf)); bp += sizeof(struct in6_addr); break; default: goto trunc; break; } /* * Options decoding can go here. */ switch (pgm_type_val) { case PGM_NAK: ND_PRINT("NAK "); break; case PGM_NULLNAK: ND_PRINT("NNAK "); break; case PGM_NCF: ND_PRINT("NCF "); break; default: break; } ND_PRINT("(%s -> %s), seq %u", source_buf, group_buf, EXTRACT_BE_U_4(nak->pgmn_seq)); break; } case PGM_ACK: { const struct pgm_ack *ack; ack = (const struct pgm_ack *)(pgm + 1); ND_TCHECK_SIZE(ack); ND_PRINT("ACK seq %u", EXTRACT_BE_U_4(ack->pgma_rx_max_seq)); bp = (const u_char *) (ack + 1); break; } case PGM_SPMR: ND_PRINT("SPMR"); break; default: ND_PRINT("UNKNOWN type 0x%02x", pgm_type_val); break; } if (EXTRACT_U_1(pgm->pgm_options) & PGM_OPT_BIT_PRESENT) { /* * make sure there's enough for the first option header */ if (!ND_TTEST_LEN(bp, PGM_MIN_OPT_LEN)) { ND_PRINT("[|OPT]"); return; } /* * That option header MUST be an OPT_LENGTH option * (see the first paragraph of section 9.1 in RFC 3208). */ opt_type = EXTRACT_U_1(bp); bp++; if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) { ND_PRINT("[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK); return; } opt_len = EXTRACT_U_1(bp); bp++; if (opt_len != 4) { ND_PRINT("[Bad OPT_LENGTH option, length %u != 4]", opt_len); return; } opts_len = EXTRACT_BE_U_2(bp); bp += sizeof(uint16_t); if (opts_len < 4) { ND_PRINT("[Bad total option length %u < 4]", opts_len); return; } ND_PRINT(" OPTS LEN %u", opts_len); opts_len -= 4; while (opts_len) { if (opts_len < PGM_MIN_OPT_LEN) { ND_PRINT("[Total option length leaves no room for final option]"); return; } if (!ND_TTEST_2(bp)) { ND_PRINT(" [|OPT]"); return; } opt_type = EXTRACT_U_1(bp); bp++; opt_len = EXTRACT_U_1(bp); bp++; if (opt_len < PGM_MIN_OPT_LEN) { ND_PRINT("[Bad option, length %u < %u]", opt_len, PGM_MIN_OPT_LEN); break; } if (opts_len < opt_len) { ND_PRINT("[Total option length leaves no room for final option]"); return; } if (!ND_TTEST_LEN(bp, opt_len - 2)) { ND_PRINT(" [|OPT]"); return; } switch (opt_type & PGM_OPT_MASK) { case PGM_OPT_LENGTH: #define PGM_OPT_LENGTH_LEN (2+2) if (opt_len != PGM_OPT_LENGTH_LEN) { ND_PRINT("[Bad OPT_LENGTH option, length %u != %u]", opt_len, PGM_OPT_LENGTH_LEN); return; } ND_PRINT(" OPTS LEN (extra?) %u", EXTRACT_BE_U_2(bp)); bp += 2; opts_len -= PGM_OPT_LENGTH_LEN; break; case PGM_OPT_FRAGMENT: #define PGM_OPT_FRAGMENT_LEN (2+2+4+4+4) if (opt_len != PGM_OPT_FRAGMENT_LEN) { ND_PRINT("[Bad OPT_FRAGMENT option, length %u != %u]", opt_len, PGM_OPT_FRAGMENT_LEN); return; } bp += 2; seq = EXTRACT_BE_U_4(bp); bp += 4; offset = EXTRACT_BE_U_4(bp); bp += 4; len = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" FRAG seq %u off %u len %u", seq, offset, len); opts_len -= PGM_OPT_FRAGMENT_LEN; break; case PGM_OPT_NAK_LIST: bp += 2; opt_len -= 4; /* option header */ ND_PRINT(" NAK LIST"); while (opt_len) { if (opt_len < 4) { ND_PRINT("[Option length not a multiple of 4]"); return; } ND_TCHECK_4(bp); ND_PRINT(" %u", EXTRACT_BE_U_4(bp)); bp += 4; opt_len -= 4; opts_len -= 4; } break; case PGM_OPT_JOIN: #define PGM_OPT_JOIN_LEN (2+2+4) if (opt_len != PGM_OPT_JOIN_LEN) { ND_PRINT("[Bad OPT_JOIN option, length %u != %u]", opt_len, PGM_OPT_JOIN_LEN); return; } bp += 2; seq = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" JOIN %u", seq); opts_len -= PGM_OPT_JOIN_LEN; break; case PGM_OPT_NAK_BO_IVL: #define PGM_OPT_NAK_BO_IVL_LEN (2+2+4+4) if (opt_len != PGM_OPT_NAK_BO_IVL_LEN) { ND_PRINT("[Bad OPT_NAK_BO_IVL option, length %u != %u]", opt_len, PGM_OPT_NAK_BO_IVL_LEN); return; } bp += 2; offset = EXTRACT_BE_U_4(bp); bp += 4; seq = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" BACKOFF ivl %u ivlseq %u", offset, seq); opts_len -= PGM_OPT_NAK_BO_IVL_LEN; break; case PGM_OPT_NAK_BO_RNG: #define PGM_OPT_NAK_BO_RNG_LEN (2+2+4+4) if (opt_len != PGM_OPT_NAK_BO_RNG_LEN) { ND_PRINT("[Bad OPT_NAK_BO_RNG option, length %u != %u]", opt_len, PGM_OPT_NAK_BO_RNG_LEN); return; } bp += 2; offset = EXTRACT_BE_U_4(bp); bp += 4; seq = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" BACKOFF max %u min %u", offset, seq); opts_len -= PGM_OPT_NAK_BO_RNG_LEN; break; case PGM_OPT_REDIRECT: #define PGM_OPT_REDIRECT_FIXED_LEN (2+2+2+2) if (opt_len < PGM_OPT_REDIRECT_FIXED_LEN) { ND_PRINT("[Bad OPT_REDIRECT option, length %u < %u]", opt_len, PGM_OPT_REDIRECT_FIXED_LEN); return; } bp += 2; nla_afnum = EXTRACT_BE_U_2(bp); bp += 2+2; switch (nla_afnum) { case AFNUM_INET: if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in_addr)) { ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]", opt_len, PGM_OPT_REDIRECT_FIXED_LEN); return; } ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in_addr); opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in_addr); break; case AFNUM_INET6: if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in6_addr)) { ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]", PGM_OPT_REDIRECT_FIXED_LEN, opt_len); return; } ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in6_addr); opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in6_addr); break; default: goto trunc; break; } ND_PRINT(" REDIRECT %s", nla_buf); break; case PGM_OPT_PARITY_PRM: #define PGM_OPT_PARITY_PRM_LEN (2+2+4) if (opt_len != PGM_OPT_PARITY_PRM_LEN) { ND_PRINT("[Bad OPT_PARITY_PRM option, length %u != %u]", opt_len, PGM_OPT_PARITY_PRM_LEN); return; } bp += 2; len = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" PARITY MAXTGS %u", len); opts_len -= PGM_OPT_PARITY_PRM_LEN; break; case PGM_OPT_PARITY_GRP: #define PGM_OPT_PARITY_GRP_LEN (2+2+4) if (opt_len != PGM_OPT_PARITY_GRP_LEN) { ND_PRINT("[Bad OPT_PARITY_GRP option, length %u != %u]", opt_len, PGM_OPT_PARITY_GRP_LEN); return; } bp += 2; seq = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" PARITY GROUP %u", seq); opts_len -= PGM_OPT_PARITY_GRP_LEN; break; case PGM_OPT_CURR_TGSIZE: #define PGM_OPT_CURR_TGSIZE_LEN (2+2+4) if (opt_len != PGM_OPT_CURR_TGSIZE_LEN) { ND_PRINT("[Bad OPT_CURR_TGSIZE option, length %u != %u]", opt_len, PGM_OPT_CURR_TGSIZE_LEN); return; } bp += 2; len = EXTRACT_BE_U_4(bp); bp += 4; ND_PRINT(" PARITY ATGS %u", len); opts_len -= PGM_OPT_CURR_TGSIZE_LEN; break; case PGM_OPT_NBR_UNREACH: #define PGM_OPT_NBR_UNREACH_LEN (2+2) if (opt_len != PGM_OPT_NBR_UNREACH_LEN) { ND_PRINT("[Bad OPT_NBR_UNREACH option, length %u != %u]", opt_len, PGM_OPT_NBR_UNREACH_LEN); return; } bp += 2; ND_PRINT(" NBR_UNREACH"); opts_len -= PGM_OPT_NBR_UNREACH_LEN; break; case PGM_OPT_PATH_NLA: ND_PRINT(" PATH_NLA [%u]", opt_len); bp += opt_len; opts_len -= opt_len; break; case PGM_OPT_SYN: #define PGM_OPT_SYN_LEN (2+2) if (opt_len != PGM_OPT_SYN_LEN) { ND_PRINT("[Bad OPT_SYN option, length %u != %u]", opt_len, PGM_OPT_SYN_LEN); return; } bp += 2; ND_PRINT(" SYN"); opts_len -= PGM_OPT_SYN_LEN; break; case PGM_OPT_FIN: #define PGM_OPT_FIN_LEN (2+2) if (opt_len != PGM_OPT_FIN_LEN) { ND_PRINT("[Bad OPT_FIN option, length %u != %u]", opt_len, PGM_OPT_FIN_LEN); return; } bp += 2; ND_PRINT(" FIN"); opts_len -= PGM_OPT_FIN_LEN; break; case PGM_OPT_RST: #define PGM_OPT_RST_LEN (2+2) if (opt_len != PGM_OPT_RST_LEN) { ND_PRINT("[Bad OPT_RST option, length %u != %u]", opt_len, PGM_OPT_RST_LEN); return; } bp += 2; ND_PRINT(" RST"); opts_len -= PGM_OPT_RST_LEN; break; case PGM_OPT_CR: ND_PRINT(" CR"); bp += opt_len; opts_len -= opt_len; break; case PGM_OPT_CRQST: #define PGM_OPT_CRQST_LEN (2+2) if (opt_len != PGM_OPT_CRQST_LEN) { ND_PRINT("[Bad OPT_CRQST option, length %u != %u]", opt_len, PGM_OPT_CRQST_LEN); return; } bp += 2; ND_PRINT(" CRQST"); opts_len -= PGM_OPT_CRQST_LEN; break; case PGM_OPT_PGMCC_DATA: #define PGM_OPT_PGMCC_DATA_FIXED_LEN (2+2+4+2+2) if (opt_len < PGM_OPT_PGMCC_DATA_FIXED_LEN) { ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u < %u]", opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN); return; } bp += 2; offset = EXTRACT_BE_U_4(bp); bp += 4; nla_afnum = EXTRACT_BE_U_2(bp); bp += 2+2; switch (nla_afnum) { case AFNUM_INET: if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in_addr)) { ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN); return; } ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in_addr); opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in_addr); break; case AFNUM_INET6: if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in6_addr)) { ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN); return; } ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in6_addr); opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in6_addr); break; default: goto trunc; break; } ND_PRINT(" PGMCC DATA %u %s", offset, nla_buf); break; case PGM_OPT_PGMCC_FEEDBACK: #define PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN (2+2+4+2+2) if (opt_len < PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN) { ND_PRINT("[Bad PGM_OPT_PGMCC_FEEDBACK option, length %u < %u]", opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN); return; } bp += 2; offset = EXTRACT_BE_U_4(bp); bp += 4; nla_afnum = EXTRACT_BE_U_2(bp); bp += 2+2; switch (nla_afnum) { case AFNUM_INET: if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in_addr)) { ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN); return; } ND_TCHECK_LEN(bp, sizeof(struct in_addr)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in_addr); opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in_addr); break; case AFNUM_INET6: if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in6_addr)) { ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN); return; } ND_TCHECK_LEN(bp, sizeof(struct in6_addr)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(struct in6_addr); opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in6_addr); break; default: goto trunc; break; } ND_PRINT(" PGMCC FEEDBACK %u %s", offset, nla_buf); break; default: ND_PRINT(" OPT_%02X [%u] ", opt_type, opt_len); bp += opt_len; opts_len -= opt_len; break; } if (opt_type & PGM_OPT_END) break; } } ND_PRINT(" [%u]", length); if (ndo->ndo_packettype == PT_PGM_ZMTP1 && (pgm_type_val == PGM_ODATA || pgm_type_val == PGM_RDATA)) zmtp1_datagram_print(ndo, bp, EXTRACT_BE_U_2(pgm->pgm_length)); return; trunc: ND_PRINT("[|pgm]"); if (ch != '\0') ND_PRINT(">"); }