summaryrefslogtreecommitdiffstats
path: root/print-pgm.c
diff options
context:
space:
mode:
Diffstat (limited to 'print-pgm.c')
-rw-r--r--print-pgm.c829
1 files changed, 829 insertions, 0 deletions
diff --git a/print-pgm.c b/print-pgm.c
new file mode 100644
index 0000000..ccb0b46
--- /dev/null
+++ b/print-pgm.c
@@ -0,0 +1,829 @@
+/*
+ * 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_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_reserved;
+ /* ... 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;
+ 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;
+
+ ndo->ndo_protocol = "pgm";
+ 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;
+ if (!ND_TTEST_2(pgm->pgm_dport)) {
+ if (ip6) {
+ ND_PRINT("%s > %s:",
+ GET_IP6ADDR_STRING(ip6->ip6_src),
+ GET_IP6ADDR_STRING(ip6->ip6_dst));
+ } else {
+ ND_PRINT("%s > %s:",
+ GET_IPADDR_STRING(ip->ip_src),
+ GET_IPADDR_STRING(ip->ip_dst));
+ }
+ nd_print_trunc(ndo);
+ return;
+ }
+
+ sport = GET_BE_U_2(pgm->pgm_sport);
+ dport = GET_BE_U_2(pgm->pgm_dport);
+
+ if (ip6) {
+ if (GET_U_1(ip6->ip6_nxt) == IPPROTO_PGM) {
+ ND_PRINT("%s.%s > %s.%s: ",
+ GET_IP6ADDR_STRING(ip6->ip6_src),
+ tcpport_string(ndo, sport),
+ 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 (GET_U_1(ip->ip_p) == IPPROTO_PGM) {
+ ND_PRINT("%s.%s > %s.%s: ",
+ GET_IPADDR_STRING(ip->ip_src),
+ tcpport_string(ndo, sport),
+ GET_IPADDR_STRING(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", GET_BE_U_2(pgm->pgm_length));
+
+ if (!ndo->ndo_vflag)
+ return;
+
+ 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],
+ 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 (GET_BE_U_2(spm->pgms_nla_afi)) {
+ case AFNUM_INET:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv6);
+ break;
+ default:
+ goto trunc;
+ break;
+ }
+
+ ND_PRINT("SPM seq %u trail %u lead %u nla %s",
+ 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 *pgm_poll;
+ uint32_t ivl, rnd, mask;
+
+ pgm_poll = (const struct pgm_poll *)(pgm + 1);
+ ND_TCHECK_SIZE(pgm_poll);
+ bp = (const u_char *) (pgm_poll + 1);
+
+ switch (GET_BE_U_2(pgm_poll->pgmp_nla_afi)) {
+ case AFNUM_INET:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv6);
+ break;
+ default:
+ goto trunc;
+ break;
+ }
+
+ ivl = GET_BE_U_4(bp);
+ bp += sizeof(uint32_t);
+
+ rnd = GET_BE_U_4(bp);
+ bp += sizeof(uint32_t);
+
+ mask = GET_BE_U_4(bp);
+ bp += sizeof(uint32_t);
+
+ 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",
+ GET_BE_U_4(odata->pgmd_trailseq),
+ GET_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",
+ GET_BE_U_4(rdata->pgmd_trailseq),
+ GET_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 (GET_BE_U_2(nak->pgmn_source_afi)) {
+ case AFNUM_INET:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, source_buf, sizeof(source_buf));
+ bp += sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, source_buf, sizeof(source_buf));
+ bp += sizeof(nd_ipv6);
+ 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));
+ switch (GET_BE_U_2(bp)) {
+ case AFNUM_INET:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, group_buf, sizeof(group_buf));
+ bp += sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, group_buf, sizeof(group_buf));
+ bp += sizeof(nd_ipv6);
+ 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, GET_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",
+ GET_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 (GET_U_1(pgm->pgm_options) & PGM_OPT_BIT_PRESENT) {
+
+ /*
+ * make sure there's enough for the first option header
+ */
+ 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 = 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 = GET_U_1(bp);
+ bp++;
+ if (opt_len != 4) {
+ ND_PRINT("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
+ return;
+ }
+ 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);
+ 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;
+ }
+ opt_type = GET_U_1(bp);
+ bp++;
+ opt_len = GET_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;
+ }
+ ND_TCHECK_LEN(bp, opt_len - 2);
+
+ 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", GET_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 = GET_BE_U_4(bp);
+ bp += 4;
+ offset = GET_BE_U_4(bp);
+ bp += 4;
+ 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;
+ 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_PRINT(" %u", GET_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 = GET_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 = GET_BE_U_4(bp);
+ bp += 4;
+ 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;
+ 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 = GET_BE_U_4(bp);
+ bp += 4;
+ 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;
+ 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 = GET_BE_U_2(bp);
+ bp += 2+2;
+ switch (nla_afnum) {
+ case AFNUM_INET:
+ 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);
+ return;
+ }
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv4);
+ opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6)) {
+ ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]",
+ opt_len, PGM_OPT_REDIRECT_FIXED_LEN);
+ return;
+ }
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv6);
+ opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6);
+ 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 = GET_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 = GET_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 = GET_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 = GET_BE_U_4(bp);
+ bp += 4;
+ nla_afnum = GET_BE_U_2(bp);
+ bp += 2+2;
+ switch (nla_afnum) {
+ case AFNUM_INET:
+ 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);
+ return;
+ }
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv4);
+ opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ 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);
+ return;
+ }
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv6);
+ opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6);
+ 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 = GET_BE_U_4(bp);
+ bp += 4;
+ nla_afnum = GET_BE_U_2(bp);
+ bp += 2+2;
+ switch (nla_afnum) {
+ case AFNUM_INET:
+ 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);
+ return;
+ }
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
+ addrtostr(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv4);
+ opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4);
+ break;
+ case AFNUM_INET6:
+ 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);
+ return;
+ }
+ ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
+ addrtostr6(bp, nla_buf, sizeof(nla_buf));
+ bp += sizeof(nd_ipv6);
+ opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6);
+ 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,
+ GET_BE_U_2(pgm->pgm_length));
+
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 13:59:32 +0000