X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/00ecef01d7dd1f53c58ddeb0f906f3ec602283f0..a63600a1fc28dbc7ae7ce9f996829c49a25fb33c:/print-pgm.c diff --git a/print-pgm.c b/print-pgm.c index 5b464a8d..3b063ba7 100644 --- a/print-pgm.c +++ b/print-pgm.c @@ -21,6 +21,7 @@ #include "netdissect-stdinc.h" +#define ND_LONGJMP_FROM_TCHECK #include "netdissect.h" #include "extract.h" #include "addrtoname.h" @@ -74,17 +75,17 @@ struct pgm_ack { struct pgm_poll { 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_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 */ }; @@ -149,7 +150,6 @@ pgm_print(netdissect_options *ndo, { const struct pgm_header *pgm; const struct ip *ip; - char ch; uint8_t pgm_type_val; uint16_t sport, dport; u_int nla_afnum; @@ -165,40 +165,39 @@ pgm_print(netdissect_options *ndo, 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)); + ND_PRINT("%s > %s:", + GET_IP6ADDR_STRING(ip6->ip6_src), + GET_IP6ADDR_STRING(ip6->ip6_dst)); } else { - ND_PRINT("%s > %s: [|pgm]", - ipaddr_string(ndo, ip->ip_src), - ipaddr_string(ndo, ip->ip_dst)); + ND_PRINT("%s > %s:", + GET_IPADDR_STRING(ip->ip_src), + GET_IPADDR_STRING(ip->ip_dst)); } - return; + nd_trunc_longjmp(ndo); } - sport = EXTRACT_BE_U_2(pgm->pgm_sport); - dport = EXTRACT_BE_U_2(pgm->pgm_dport); + sport = GET_BE_U_2(pgm->pgm_sport); + dport = GET_BE_U_2(pgm->pgm_dport); if (ip6) { - if (EXTRACT_U_1(ip6->ip6_nxt) == IPPROTO_PGM) { + if (GET_U_1(ip6->ip6_nxt) == IPPROTO_PGM) { ND_PRINT("%s.%s > %s.%s: ", - ip6addr_string(ndo, ip6->ip6_src), + GET_IP6ADDR_STRING(ip6->ip6_src), tcpport_string(ndo, sport), - ip6addr_string(ndo, ip6->ip6_dst), + GET_IP6ADDR_STRING(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) { + if (GET_U_1(ip->ip_p) == IPPROTO_PGM) { ND_PRINT("%s.%s > %s.%s: ", - ipaddr_string(ndo, ip->ip_src), + GET_IPADDR_STRING(ip->ip_src), tcpport_string(ndo, sport), - ipaddr_string(ndo, ip->ip_dst), + GET_IPADDR_STRING(ip->ip_dst), tcpport_string(ndo, dport)); } else { ND_PRINT("%s > %s: ", @@ -208,12 +207,12 @@ pgm_print(netdissect_options *ndo, ND_TCHECK_SIZE(pgm); - ND_PRINT("PGM, length %u", EXTRACT_BE_U_2(pgm->pgm_length)); + ND_PRINT("PGM, length %u", GET_BE_U_2(pgm->pgm_length)); if (!ndo->ndo_vflag) return; - pgm_type_val = EXTRACT_U_1(pgm->pgm_type); + pgm_type_val = GET_U_1(pgm->pgm_type); ND_PRINT(" 0x%02x%02x%02x%02x%02x%02x ", pgm->pgm_gsid[0], pgm->pgm_gsid[1], @@ -229,90 +228,87 @@ pgm_print(netdissect_options *ndo, ND_TCHECK_SIZE(spm); bp = (const u_char *) (spm + 1); - switch (EXTRACT_BE_U_2(spm->pgms_nla_afi)) { - case AFNUM_INET: + switch (GET_BE_U_2(spm->pgms_nla_afi)) { + case AFNUM_IP: ND_TCHECK_LEN(bp, sizeof(nd_ipv4)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: ND_TCHECK_LEN(bp, sizeof(nd_ipv6)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; 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), + GET_BE_U_4(spm->pgms_seq), + GET_BE_U_4(spm->pgms_trailseq), + GET_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; + const struct pgm_poll *pgm_poll; uint32_t ivl, rnd, mask; - polr = (const struct pgm_polr *)(pgm + 1); - ND_TCHECK_SIZE(polr); - bp = (const u_char *) (polr + 1); + pgm_poll = (const struct pgm_poll *)(pgm + 1); + ND_TCHECK_SIZE(pgm_poll); + bp = (const u_char *) (pgm_poll + 1); - switch (EXTRACT_BE_U_2(polr->pgmp_nla_afi)) { - case AFNUM_INET: + switch (GET_BE_U_2(pgm_poll->pgmp_nla_afi)) { + case AFNUM_IP: ND_TCHECK_LEN(bp, sizeof(nd_ipv4)); addrtostr(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: ND_TCHECK_LEN(bp, sizeof(nd_ipv6)); addrtostr6(bp, nla_buf, sizeof(nla_buf)); bp += sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; break; } - ND_TCHECK_LEN(bp, sizeof(uint32_t)); - ivl = EXTRACT_BE_U_4(bp); + ivl = GET_BE_U_4(bp); bp += sizeof(uint32_t); - ND_TCHECK_LEN(bp, sizeof(uint32_t)); - rnd = EXTRACT_BE_U_4(bp); + rnd = GET_BE_U_4(bp); bp += sizeof(uint32_t); - ND_TCHECK_LEN(bp, sizeof(uint32_t)); - mask = EXTRACT_BE_U_4(bp); + mask = GET_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); + ND_PRINT("POLL seq %u round %u nla %s ivl %u rnd 0x%08x " + "mask 0x%08x", GET_BE_U_4(pgm_poll->pgmp_seq), + GET_BE_U_2(pgm_poll->pgmp_round), nla_buf, ivl, rnd, + mask); + break; + } + case PGM_POLR: { + const struct pgm_polr *polr_msg; + + polr_msg = (const struct pgm_polr *)(pgm + 1); + ND_TCHECK_SIZE(polr_msg); + ND_PRINT("POLR seq %u round %u", + GET_BE_U_4(polr_msg->pgmp_seq), + GET_BE_U_2(polr_msg->pgmp_round)); + bp = (const u_char *) (polr_msg + 1); 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)); + GET_BE_U_4(odata->pgmd_trailseq), + GET_BE_U_4(odata->pgmd_seq)); bp = (const u_char *) (odata + 1); break; } @@ -321,10 +317,9 @@ pgm_print(netdissect_options *ndo, 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)); + GET_BE_U_4(rdata->pgmd_trailseq), + GET_BE_U_4(rdata->pgmd_seq)); bp = (const u_char *) (rdata + 1); break; } @@ -343,19 +338,19 @@ pgm_print(netdissect_options *ndo, * 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: + switch (GET_BE_U_2(nak->pgmn_source_afi)) { + case AFNUM_IP: ND_TCHECK_LEN(bp, sizeof(nd_ipv4)); addrtostr(bp, source_buf, sizeof(source_buf)); bp += sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: ND_TCHECK_LEN(bp, sizeof(nd_ipv6)); addrtostr6(bp, source_buf, sizeof(source_buf)); bp += sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; break; } @@ -364,20 +359,19 @@ pgm_print(netdissect_options *ndo, * 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: + switch (GET_BE_U_2(bp)) { + case AFNUM_IP: ND_TCHECK_LEN(bp, sizeof(nd_ipv4)); addrtostr(bp, group_buf, sizeof(group_buf)); bp += sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: ND_TCHECK_LEN(bp, sizeof(nd_ipv6)); addrtostr6(bp, group_buf, sizeof(group_buf)); bp += sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; break; } @@ -398,7 +392,7 @@ pgm_print(netdissect_options *ndo, break; } ND_PRINT("(%s -> %s), seq %u", - source_buf, group_buf, EXTRACT_BE_U_4(nak->pgmn_seq)); + source_buf, group_buf, GET_BE_U_4(nak->pgmn_seq)); break; } @@ -408,7 +402,7 @@ pgm_print(netdissect_options *ndo, 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)); + GET_BE_U_4(ack->pgma_rx_max_seq)); bp = (const u_char *) (ack + 1); break; } @@ -422,33 +416,30 @@ pgm_print(netdissect_options *ndo, break; } - if (EXTRACT_U_1(pgm->pgm_options) & PGM_OPT_BIT_PRESENT) { + if (GET_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_trunc(ndo); - return; - } + ND_TCHECK_LEN(bp, PGM_MIN_OPT_LEN); /* * 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); + opt_type = GET_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); + opt_len = GET_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); + opts_len = GET_BE_U_2(bp); bp += sizeof(uint16_t); if (opts_len < 4) { ND_PRINT("[Bad total option length %u < 4]", opts_len); @@ -462,13 +453,9 @@ pgm_print(netdissect_options *ndo, ND_PRINT("[Total option length leaves no room for final option]"); return; } - if (!ND_TTEST_2(bp)) { - nd_print_trunc(ndo); - return; - } - opt_type = EXTRACT_U_1(bp); + opt_type = GET_U_1(bp); bp++; - opt_len = EXTRACT_U_1(bp); + opt_len = GET_U_1(bp); bp++; if (opt_len < PGM_MIN_OPT_LEN) { ND_PRINT("[Bad option, length %u < %u]", opt_len, @@ -479,10 +466,7 @@ pgm_print(netdissect_options *ndo, ND_PRINT("[Total option length leaves no room for final option]"); return; } - if (!ND_TTEST_LEN(bp, opt_len - 2)) { - nd_print_trunc(ndo); - return; - } + ND_TCHECK_LEN(bp, opt_len - 2); switch (opt_type & PGM_OPT_MASK) { case PGM_OPT_LENGTH: @@ -492,7 +476,7 @@ pgm_print(netdissect_options *ndo, opt_len, PGM_OPT_LENGTH_LEN); return; } - ND_PRINT(" OPTS LEN (extra?) %u", EXTRACT_BE_U_2(bp)); + ND_PRINT(" OPTS LEN (extra?) %u", GET_BE_U_2(bp)); bp += 2; opts_len -= PGM_OPT_LENGTH_LEN; break; @@ -505,11 +489,11 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - seq = EXTRACT_BE_U_4(bp); + seq = GET_BE_U_4(bp); bp += 4; - offset = EXTRACT_BE_U_4(bp); + offset = GET_BE_U_4(bp); bp += 4; - len = EXTRACT_BE_U_4(bp); + len = GET_BE_U_4(bp); bp += 4; ND_PRINT(" FRAG seq %u off %u len %u", seq, offset, len); opts_len -= PGM_OPT_FRAGMENT_LEN; @@ -524,8 +508,7 @@ pgm_print(netdissect_options *ndo, ND_PRINT("[Option length not a multiple of 4]"); return; } - ND_TCHECK_4(bp); - ND_PRINT(" %u", EXTRACT_BE_U_4(bp)); + ND_PRINT(" %u", GET_BE_U_4(bp)); bp += 4; opt_len -= 4; opts_len -= 4; @@ -540,7 +523,7 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - seq = EXTRACT_BE_U_4(bp); + seq = GET_BE_U_4(bp); bp += 4; ND_PRINT(" JOIN %u", seq); opts_len -= PGM_OPT_JOIN_LEN; @@ -554,9 +537,9 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - offset = EXTRACT_BE_U_4(bp); + offset = GET_BE_U_4(bp); bp += 4; - seq = EXTRACT_BE_U_4(bp); + seq = GET_BE_U_4(bp); bp += 4; ND_PRINT(" BACKOFF ivl %u ivlseq %u", offset, seq); opts_len -= PGM_OPT_NAK_BO_IVL_LEN; @@ -570,9 +553,9 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - offset = EXTRACT_BE_U_4(bp); + offset = GET_BE_U_4(bp); bp += 4; - seq = EXTRACT_BE_U_4(bp); + seq = GET_BE_U_4(bp); bp += 4; ND_PRINT(" BACKOFF max %u min %u", offset, seq); opts_len -= PGM_OPT_NAK_BO_RNG_LEN; @@ -586,10 +569,10 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - nla_afnum = EXTRACT_BE_U_2(bp); + nla_afnum = GET_BE_U_2(bp); bp += 2+2; switch (nla_afnum) { - case AFNUM_INET: + case AFNUM_IP: if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4)) { ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]", opt_len, PGM_OPT_REDIRECT_FIXED_LEN); @@ -600,10 +583,10 @@ pgm_print(netdissect_options *ndo, bp += sizeof(nd_ipv4); opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6)) { ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]", - PGM_OPT_REDIRECT_FIXED_LEN, opt_len); + opt_len, PGM_OPT_REDIRECT_FIXED_LEN); return; } ND_TCHECK_LEN(bp, sizeof(nd_ipv6)); @@ -612,7 +595,7 @@ pgm_print(netdissect_options *ndo, opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; break; } @@ -627,7 +610,7 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - len = EXTRACT_BE_U_4(bp); + len = GET_BE_U_4(bp); bp += 4; ND_PRINT(" PARITY MAXTGS %u", len); opts_len -= PGM_OPT_PARITY_PRM_LEN; @@ -641,7 +624,7 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - seq = EXTRACT_BE_U_4(bp); + seq = GET_BE_U_4(bp); bp += 4; ND_PRINT(" PARITY GROUP %u", seq); opts_len -= PGM_OPT_PARITY_GRP_LEN; @@ -655,7 +638,7 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - len = EXTRACT_BE_U_4(bp); + len = GET_BE_U_4(bp); bp += 4; ND_PRINT(" PARITY ATGS %u", len); opts_len -= PGM_OPT_CURR_TGSIZE_LEN; @@ -741,12 +724,12 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - offset = EXTRACT_BE_U_4(bp); + offset = GET_BE_U_4(bp); bp += 4; - nla_afnum = EXTRACT_BE_U_2(bp); + nla_afnum = GET_BE_U_2(bp); bp += 2+2; switch (nla_afnum) { - case AFNUM_INET: + case AFNUM_IP: if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4)) { ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN); @@ -757,7 +740,7 @@ pgm_print(netdissect_options *ndo, bp += sizeof(nd_ipv4); opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6)) { ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN); @@ -769,7 +752,7 @@ pgm_print(netdissect_options *ndo, opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; break; } @@ -784,12 +767,12 @@ pgm_print(netdissect_options *ndo, return; } bp += 2; - offset = EXTRACT_BE_U_4(bp); + offset = GET_BE_U_4(bp); bp += 4; - nla_afnum = EXTRACT_BE_U_2(bp); + nla_afnum = GET_BE_U_2(bp); bp += 2+2; switch (nla_afnum) { - case AFNUM_INET: + case AFNUM_IP: if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4)) { ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN); @@ -800,7 +783,7 @@ pgm_print(netdissect_options *ndo, bp += sizeof(nd_ipv4); opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4); break; - case AFNUM_INET6: + case AFNUM_IP6: if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6)) { ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]", opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN); @@ -812,7 +795,7 @@ pgm_print(netdissect_options *ndo, opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6); break; default: - goto trunc; + goto invalid; break; } @@ -835,12 +818,9 @@ pgm_print(netdissect_options *ndo, 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)); + GET_BE_U_2(pgm->pgm_length)); return; - -trunc: - nd_print_trunc(ndo); - if (ch != '\0') - ND_PRINT(">"); +invalid: + nd_print_invalid(ndo); }