/*
* 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);
}