699 lines
18 KiB
C
699 lines
18 KiB
C
/*
|
|
* Copyright (C) Arnaldo Carvalho de Melo 2004
|
|
* Copyright (C) Ian McDonald 2005
|
|
* Copyright (C) Yoshifumi Nishida 2005
|
|
*
|
|
* This software may be distributed either under the terms of the
|
|
* BSD-style license that accompanies tcpdump or the GNU GPL version 2
|
|
*/
|
|
|
|
/* \summary: Datagram Congestion Control Protocol (DCCP) printer */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <netdissect-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "netdissect.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h"
|
|
#include "ip.h"
|
|
#include "ip6.h"
|
|
#include "ipproto.h"
|
|
|
|
/* RFC4340: Datagram Congestion Control Protocol (DCCP) */
|
|
|
|
/**
|
|
* struct dccp_hdr - generic part of DCCP packet header, with a 24-bit
|
|
* sequence number
|
|
*
|
|
* @dccph_sport - Relevant port on the endpoint that sent this packet
|
|
* @dccph_dport - Relevant port on the other endpoint
|
|
* @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
|
|
* @dccph_ccval - Used by the HC-Sender CCID
|
|
* @dccph_cscov - Parts of the packet that are covered by the Checksum field
|
|
* @dccph_checksum - Internet checksum, depends on dccph_cscov
|
|
* @dccph_x - 0 = 24 bit sequence number, 1 = 48
|
|
* @dccph_type - packet type, see DCCP_PKT_ prefixed macros
|
|
* @dccph_seq - 24-bit sequence number
|
|
*/
|
|
struct dccp_hdr {
|
|
uint16_t dccph_sport,
|
|
dccph_dport;
|
|
uint8_t dccph_doff;
|
|
uint8_t dccph_ccval_cscov;
|
|
uint16_t dccph_checksum;
|
|
uint8_t dccph_xtr;
|
|
uint8_t dccph_seq[3];
|
|
} UNALIGNED;
|
|
|
|
/**
|
|
* struct dccp_hdr_ext - generic part of DCCP packet header, with a 48-bit
|
|
* sequence number
|
|
*
|
|
* @dccph_sport - Relevant port on the endpoint that sent this packet
|
|
* @dccph_dport - Relevant port on the other endpoint
|
|
* @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
|
|
* @dccph_ccval - Used by the HC-Sender CCID
|
|
* @dccph_cscov - Parts of the packet that are covered by the Checksum field
|
|
* @dccph_checksum - Internet checksum, depends on dccph_cscov
|
|
* @dccph_x - 0 = 24 bit sequence number, 1 = 48
|
|
* @dccph_type - packet type, see DCCP_PKT_ prefixed macros
|
|
* @dccph_seq - 48-bit sequence number
|
|
*/
|
|
struct dccp_hdr_ext {
|
|
uint16_t dccph_sport,
|
|
dccph_dport;
|
|
uint8_t dccph_doff;
|
|
uint8_t dccph_ccval_cscov;
|
|
uint16_t dccph_checksum;
|
|
uint8_t dccph_xtr;
|
|
uint8_t reserved;
|
|
uint8_t dccph_seq[6];
|
|
} UNALIGNED;
|
|
|
|
#define DCCPH_CCVAL(dh) (((dh)->dccph_ccval_cscov >> 4) & 0xF)
|
|
#define DCCPH_CSCOV(dh) (((dh)->dccph_ccval_cscov) & 0xF)
|
|
|
|
#define DCCPH_X(dh) ((dh)->dccph_xtr & 1)
|
|
#define DCCPH_TYPE(dh) (((dh)->dccph_xtr >> 1) & 0xF)
|
|
|
|
/**
|
|
* struct dccp_hdr_request - Conection initiation request header
|
|
*
|
|
* @dccph_req_service - Service to which the client app wants to connect
|
|
*/
|
|
struct dccp_hdr_request {
|
|
uint32_t dccph_req_service;
|
|
} UNALIGNED;
|
|
|
|
/**
|
|
* struct dccp_hdr_response - Conection initiation response header
|
|
*
|
|
* @dccph_resp_ack - 48 bit ack number, contains GSR
|
|
* @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
|
|
*/
|
|
struct dccp_hdr_response {
|
|
uint8_t dccph_resp_ack[8]; /* always 8 bytes */
|
|
uint32_t dccph_resp_service;
|
|
} UNALIGNED;
|
|
|
|
/**
|
|
* struct dccp_hdr_reset - Unconditionally shut down a connection
|
|
*
|
|
* @dccph_resp_ack - 48 bit ack number
|
|
* @dccph_reset_service - Echoes the Service Code on a received DCCP-Request
|
|
*/
|
|
struct dccp_hdr_reset {
|
|
uint8_t dccph_reset_ack[8]; /* always 8 bytes */
|
|
uint8_t dccph_reset_code,
|
|
dccph_reset_data[3];
|
|
} UNALIGNED;
|
|
|
|
enum dccp_pkt_type {
|
|
DCCP_PKT_REQUEST = 0,
|
|
DCCP_PKT_RESPONSE,
|
|
DCCP_PKT_DATA,
|
|
DCCP_PKT_ACK,
|
|
DCCP_PKT_DATAACK,
|
|
DCCP_PKT_CLOSEREQ,
|
|
DCCP_PKT_CLOSE,
|
|
DCCP_PKT_RESET,
|
|
DCCP_PKT_SYNC,
|
|
DCCP_PKT_SYNCACK
|
|
};
|
|
|
|
static const struct tok dccp_pkt_type_str[] = {
|
|
{ DCCP_PKT_REQUEST, "DCCP-Request" },
|
|
{ DCCP_PKT_RESPONSE, "DCCP-Response" },
|
|
{ DCCP_PKT_DATA, "DCCP-Data" },
|
|
{ DCCP_PKT_ACK, "DCCP-Ack" },
|
|
{ DCCP_PKT_DATAACK, "DCCP-DataAck" },
|
|
{ DCCP_PKT_CLOSEREQ, "DCCP-CloseReq" },
|
|
{ DCCP_PKT_CLOSE, "DCCP-Close" },
|
|
{ DCCP_PKT_RESET, "DCCP-Reset" },
|
|
{ DCCP_PKT_SYNC, "DCCP-Sync" },
|
|
{ DCCP_PKT_SYNCACK, "DCCP-SyncAck" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
enum dccp_reset_codes {
|
|
DCCP_RESET_CODE_UNSPECIFIED = 0,
|
|
DCCP_RESET_CODE_CLOSED,
|
|
DCCP_RESET_CODE_ABORTED,
|
|
DCCP_RESET_CODE_NO_CONNECTION,
|
|
DCCP_RESET_CODE_PACKET_ERROR,
|
|
DCCP_RESET_CODE_OPTION_ERROR,
|
|
DCCP_RESET_CODE_MANDATORY_ERROR,
|
|
DCCP_RESET_CODE_CONNECTION_REFUSED,
|
|
DCCP_RESET_CODE_BAD_SERVICE_CODE,
|
|
DCCP_RESET_CODE_TOO_BUSY,
|
|
DCCP_RESET_CODE_BAD_INIT_COOKIE,
|
|
DCCP_RESET_CODE_AGGRESSION_PENALTY,
|
|
__DCCP_RESET_CODE_LAST
|
|
};
|
|
|
|
static const char tstr[] = "[|dccp]";
|
|
|
|
static const char *dccp_reset_codes[] = {
|
|
"unspecified",
|
|
"closed",
|
|
"aborted",
|
|
"no_connection",
|
|
"packet_error",
|
|
"option_error",
|
|
"mandatory_error",
|
|
"connection_refused",
|
|
"bad_service_code",
|
|
"too_busy",
|
|
"bad_init_cookie",
|
|
"aggression_penalty",
|
|
};
|
|
|
|
static const char *dccp_feature_nums[] = {
|
|
"reserved",
|
|
"ccid",
|
|
"allow_short_seqno",
|
|
"sequence_window",
|
|
"ecn_incapable",
|
|
"ack_ratio",
|
|
"send_ack_vector",
|
|
"send_ndp_count",
|
|
"minimum checksum coverage",
|
|
"check data checksum",
|
|
};
|
|
|
|
static inline u_int dccp_csum_coverage(const struct dccp_hdr* dh, u_int len)
|
|
{
|
|
u_int cov;
|
|
|
|
if (DCCPH_CSCOV(dh) == 0)
|
|
return len;
|
|
cov = (dh->dccph_doff + DCCPH_CSCOV(dh) - 1) * sizeof(uint32_t);
|
|
return (cov > len)? len : cov;
|
|
}
|
|
|
|
static int dccp_cksum(netdissect_options *ndo, const struct ip *ip,
|
|
const struct dccp_hdr *dh, u_int len)
|
|
{
|
|
return nextproto4_cksum(ndo, ip, (const uint8_t *)(const void *)dh, len,
|
|
dccp_csum_coverage(dh, len), IPPROTO_DCCP);
|
|
}
|
|
|
|
static int dccp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
|
|
const struct dccp_hdr *dh, u_int len)
|
|
{
|
|
return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)dh, len,
|
|
dccp_csum_coverage(dh, len), IPPROTO_DCCP);
|
|
}
|
|
|
|
static const char *dccp_reset_code(uint8_t code)
|
|
{
|
|
if (code >= __DCCP_RESET_CODE_LAST)
|
|
return "invalid";
|
|
return dccp_reset_codes[code];
|
|
}
|
|
|
|
static uint64_t dccp_seqno(const u_char *bp)
|
|
{
|
|
const struct dccp_hdr *dh = (const struct dccp_hdr *)bp;
|
|
uint64_t seqno;
|
|
|
|
if (DCCPH_X(dh) != 0) {
|
|
const struct dccp_hdr_ext *dhx = (const struct dccp_hdr_ext *)bp;
|
|
seqno = EXTRACT_48BITS(dhx->dccph_seq);
|
|
} else {
|
|
seqno = EXTRACT_24BITS(dh->dccph_seq);
|
|
}
|
|
|
|
return seqno;
|
|
}
|
|
|
|
static inline unsigned int dccp_basic_hdr_len(const struct dccp_hdr *dh)
|
|
{
|
|
return DCCPH_X(dh) ? sizeof(struct dccp_hdr_ext) : sizeof(struct dccp_hdr);
|
|
}
|
|
|
|
static void dccp_print_ack_no(netdissect_options *ndo, const u_char *bp)
|
|
{
|
|
const struct dccp_hdr *dh = (const struct dccp_hdr *)bp;
|
|
const u_char *ackp = bp + dccp_basic_hdr_len(dh);
|
|
uint64_t ackno;
|
|
|
|
if (DCCPH_X(dh) != 0) {
|
|
ND_TCHECK2(*ackp, 8);
|
|
ackno = EXTRACT_48BITS(ackp + 2);
|
|
} else {
|
|
ND_TCHECK2(*ackp, 4);
|
|
ackno = EXTRACT_24BITS(ackp + 1);
|
|
}
|
|
|
|
ND_PRINT((ndo, "(ack=%" PRIu64 ") ", ackno));
|
|
trunc:
|
|
return;
|
|
}
|
|
|
|
static int dccp_print_option(netdissect_options *, const u_char *, u_int);
|
|
|
|
/**
|
|
* dccp_print - show dccp packet
|
|
* @bp - beginning of dccp packet
|
|
* @data2 - beginning of enclosing
|
|
* @len - lenght of ip packet
|
|
*/
|
|
void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
|
|
u_int len)
|
|
{
|
|
const struct dccp_hdr *dh;
|
|
const struct ip *ip;
|
|
const struct ip6_hdr *ip6;
|
|
const u_char *cp;
|
|
u_short sport, dport;
|
|
u_int hlen;
|
|
u_int fixed_hdrlen;
|
|
uint8_t dccph_type;
|
|
|
|
dh = (const struct dccp_hdr *)bp;
|
|
|
|
ip = (const struct ip *)data2;
|
|
if (IP_V(ip) == 6)
|
|
ip6 = (const struct ip6_hdr *)data2;
|
|
else
|
|
ip6 = NULL;
|
|
|
|
/* make sure we have enough data to look at the X bit */
|
|
cp = (const u_char *)(dh + 1);
|
|
if (cp > ndo->ndo_snapend) {
|
|
ND_PRINT((ndo, "[Invalid packet|dccp]"));
|
|
return;
|
|
}
|
|
if (len < sizeof(struct dccp_hdr)) {
|
|
ND_PRINT((ndo, "truncated-dccp - %u bytes missing!",
|
|
len - (u_int)sizeof(struct dccp_hdr)));
|
|
return;
|
|
}
|
|
|
|
/* get the length of the generic header */
|
|
fixed_hdrlen = dccp_basic_hdr_len(dh);
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-dccp - %u bytes missing!",
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_TCHECK2(*dh, fixed_hdrlen);
|
|
|
|
sport = EXTRACT_16BITS(&dh->dccph_sport);
|
|
dport = EXTRACT_16BITS(&dh->dccph_dport);
|
|
hlen = dh->dccph_doff * 4;
|
|
|
|
if (ip6) {
|
|
ND_PRINT((ndo, "%s.%d > %s.%d: ",
|
|
ip6addr_string(ndo, &ip6->ip6_src), sport,
|
|
ip6addr_string(ndo, &ip6->ip6_dst), dport));
|
|
} else {
|
|
ND_PRINT((ndo, "%s.%d > %s.%d: ",
|
|
ipaddr_string(ndo, &ip->ip_src), sport,
|
|
ipaddr_string(ndo, &ip->ip_dst), dport));
|
|
}
|
|
|
|
ND_PRINT((ndo, "DCCP"));
|
|
|
|
if (ndo->ndo_qflag) {
|
|
ND_PRINT((ndo, " %d", len - hlen));
|
|
if (hlen > len) {
|
|
ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]",
|
|
hlen, len));
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* other variables in generic header */
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo, " (CCVal %d, CsCov %d, ", DCCPH_CCVAL(dh), DCCPH_CSCOV(dh)));
|
|
}
|
|
|
|
/* checksum calculation */
|
|
if (ndo->ndo_vflag && ND_TTEST2(bp[0], len)) {
|
|
uint16_t sum = 0, dccp_sum;
|
|
|
|
dccp_sum = EXTRACT_16BITS(&dh->dccph_checksum);
|
|
ND_PRINT((ndo, "cksum 0x%04x ", dccp_sum));
|
|
if (IP_V(ip) == 4)
|
|
sum = dccp_cksum(ndo, ip, dh, len);
|
|
else if (IP_V(ip) == 6)
|
|
sum = dccp6_cksum(ndo, ip6, dh, len);
|
|
if (sum != 0)
|
|
ND_PRINT((ndo, "(incorrect -> 0x%04x)",in_cksum_shouldbe(dccp_sum, sum)));
|
|
else
|
|
ND_PRINT((ndo, "(correct)"));
|
|
}
|
|
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo, ")"));
|
|
ND_PRINT((ndo, " "));
|
|
|
|
dccph_type = DCCPH_TYPE(dh);
|
|
switch (dccph_type) {
|
|
case DCCP_PKT_REQUEST: {
|
|
const struct dccp_hdr_request *dhr =
|
|
(const struct dccp_hdr_request *)(bp + fixed_hdrlen);
|
|
fixed_hdrlen += 4;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_TCHECK(*dhr);
|
|
ND_PRINT((ndo, "%s (service=%d) ",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
EXTRACT_32BITS(&dhr->dccph_req_service)));
|
|
break;
|
|
}
|
|
case DCCP_PKT_RESPONSE: {
|
|
const struct dccp_hdr_response *dhr =
|
|
(const struct dccp_hdr_response *)(bp + fixed_hdrlen);
|
|
fixed_hdrlen += 12;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_TCHECK(*dhr);
|
|
ND_PRINT((ndo, "%s (service=%d) ",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
EXTRACT_32BITS(&dhr->dccph_resp_service)));
|
|
break;
|
|
}
|
|
case DCCP_PKT_DATA:
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
case DCCP_PKT_ACK: {
|
|
fixed_hdrlen += 8;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
}
|
|
case DCCP_PKT_DATAACK: {
|
|
fixed_hdrlen += 8;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
}
|
|
case DCCP_PKT_CLOSEREQ:
|
|
fixed_hdrlen += 8;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
case DCCP_PKT_CLOSE:
|
|
fixed_hdrlen += 8;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
case DCCP_PKT_RESET: {
|
|
const struct dccp_hdr_reset *dhr =
|
|
(const struct dccp_hdr_reset *)(bp + fixed_hdrlen);
|
|
fixed_hdrlen += 12;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_TCHECK(*dhr);
|
|
ND_PRINT((ndo, "%s (code=%s) ",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
dccp_reset_code(dhr->dccph_reset_code)));
|
|
break;
|
|
}
|
|
case DCCP_PKT_SYNC:
|
|
fixed_hdrlen += 8;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
case DCCP_PKT_SYNCACK:
|
|
fixed_hdrlen += 8;
|
|
if (len < fixed_hdrlen) {
|
|
ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
|
|
tok2str(dccp_pkt_type_str, "", dccph_type),
|
|
len - fixed_hdrlen));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "unknown-type-%u", dccph_type)));
|
|
break;
|
|
}
|
|
|
|
if ((DCCPH_TYPE(dh) != DCCP_PKT_DATA) &&
|
|
(DCCPH_TYPE(dh) != DCCP_PKT_REQUEST))
|
|
dccp_print_ack_no(ndo, bp);
|
|
|
|
if (ndo->ndo_vflag < 2)
|
|
return;
|
|
|
|
ND_PRINT((ndo, "seq %" PRIu64, dccp_seqno(bp)));
|
|
|
|
/* process options */
|
|
if (hlen > fixed_hdrlen){
|
|
u_int optlen;
|
|
cp = bp + fixed_hdrlen;
|
|
ND_PRINT((ndo, " <"));
|
|
|
|
hlen -= fixed_hdrlen;
|
|
while(1){
|
|
optlen = dccp_print_option(ndo, cp, hlen);
|
|
if (!optlen)
|
|
break;
|
|
if (hlen <= optlen)
|
|
break;
|
|
hlen -= optlen;
|
|
cp += optlen;
|
|
ND_PRINT((ndo, ", "));
|
|
}
|
|
ND_PRINT((ndo, ">"));
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
return;
|
|
}
|
|
|
|
static const struct tok dccp_option_values[] = {
|
|
{ 0, "nop" },
|
|
{ 1, "mandatory" },
|
|
{ 2, "slowreceiver" },
|
|
{ 32, "change_l" },
|
|
{ 33, "confirm_l" },
|
|
{ 34, "change_r" },
|
|
{ 35, "confirm_r" },
|
|
{ 36, "initcookie" },
|
|
{ 37, "ndp_count" },
|
|
{ 38, "ack_vector0" },
|
|
{ 39, "ack_vector1" },
|
|
{ 40, "data_dropped" },
|
|
{ 41, "timestamp" },
|
|
{ 42, "timestamp_echo" },
|
|
{ 43, "elapsed_time" },
|
|
{ 44, "data_checksum" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static int
|
|
dccp_print_option(netdissect_options *ndo, const u_char *option, u_int hlen)
|
|
{
|
|
uint8_t optlen, i;
|
|
|
|
ND_TCHECK(*option);
|
|
|
|
if (*option >= 32) {
|
|
ND_TCHECK(*(option+1));
|
|
optlen = *(option +1);
|
|
if (optlen < 2) {
|
|
if (*option >= 128)
|
|
ND_PRINT((ndo, "CCID option %u optlen too short", *option));
|
|
else
|
|
ND_PRINT((ndo, "%s optlen too short",
|
|
tok2str(dccp_option_values, "Option %u", *option)));
|
|
return 0;
|
|
}
|
|
} else
|
|
optlen = 1;
|
|
|
|
if (hlen < optlen) {
|
|
if (*option >= 128)
|
|
ND_PRINT((ndo, "CCID option %u optlen goes past header length",
|
|
*option));
|
|
else
|
|
ND_PRINT((ndo, "%s optlen goes past header length",
|
|
tok2str(dccp_option_values, "Option %u", *option)));
|
|
return 0;
|
|
}
|
|
ND_TCHECK2(*option, optlen);
|
|
|
|
if (*option >= 128) {
|
|
ND_PRINT((ndo, "CCID option %d", *option));
|
|
switch (optlen) {
|
|
case 4:
|
|
ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
|
|
break;
|
|
case 6:
|
|
ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
ND_PRINT((ndo, "%s", tok2str(dccp_option_values, "Option %u", *option)));
|
|
switch (*option) {
|
|
case 32:
|
|
case 33:
|
|
case 34:
|
|
case 35:
|
|
if (optlen < 3) {
|
|
ND_PRINT((ndo, " optlen too short"));
|
|
return optlen;
|
|
}
|
|
if (*(option + 2) < 10){
|
|
ND_PRINT((ndo, " %s", dccp_feature_nums[*(option + 2)]));
|
|
for (i = 0; i < optlen - 3; i++)
|
|
ND_PRINT((ndo, " %d", *(option + 3 + i)));
|
|
}
|
|
break;
|
|
case 36:
|
|
if (optlen > 2) {
|
|
ND_PRINT((ndo, " 0x"));
|
|
for (i = 0; i < optlen - 2; i++)
|
|
ND_PRINT((ndo, "%02x", *(option + 2 + i)));
|
|
}
|
|
break;
|
|
case 37:
|
|
for (i = 0; i < optlen - 2; i++)
|
|
ND_PRINT((ndo, " %d", *(option + 2 + i)));
|
|
break;
|
|
case 38:
|
|
if (optlen > 2) {
|
|
ND_PRINT((ndo, " 0x"));
|
|
for (i = 0; i < optlen - 2; i++)
|
|
ND_PRINT((ndo, "%02x", *(option + 2 + i)));
|
|
}
|
|
break;
|
|
case 39:
|
|
if (optlen > 2) {
|
|
ND_PRINT((ndo, " 0x"));
|
|
for (i = 0; i < optlen - 2; i++)
|
|
ND_PRINT((ndo, "%02x", *(option + 2 + i)));
|
|
}
|
|
break;
|
|
case 40:
|
|
if (optlen > 2) {
|
|
ND_PRINT((ndo, " 0x"));
|
|
for (i = 0; i < optlen - 2; i++)
|
|
ND_PRINT((ndo, "%02x", *(option + 2 + i)));
|
|
}
|
|
break;
|
|
case 41:
|
|
/*
|
|
* 13.1. Timestamp Option
|
|
*
|
|
* +--------+--------+--------+--------+--------+--------+
|
|
* |00101001|00000110| Timestamp Value |
|
|
* +--------+--------+--------+--------+--------+--------+
|
|
* Type=41 Length=6
|
|
*/
|
|
if (optlen == 6)
|
|
ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
|
|
else
|
|
ND_PRINT((ndo, " [optlen != 6]"));
|
|
break;
|
|
case 42:
|
|
/*
|
|
* 13.3. Timestamp Echo Option
|
|
*
|
|
* +--------+--------+--------+--------+--------+--------+
|
|
* |00101010|00000110| Timestamp Echo |
|
|
* +--------+--------+--------+--------+--------+--------+
|
|
* Type=42 Len=6
|
|
*
|
|
* +--------+--------+------- ... -------+--------+--------+
|
|
* |00101010|00001000| Timestamp Echo | Elapsed Time |
|
|
* +--------+--------+------- ... -------+--------+--------+
|
|
* Type=42 Len=8 (4 bytes)
|
|
*
|
|
* +--------+--------+------- ... -------+------- ... -------+
|
|
* |00101010|00001010| Timestamp Echo | Elapsed Time |
|
|
* +--------+--------+------- ... -------+------- ... -------+
|
|
* Type=42 Len=10 (4 bytes) (4 bytes)
|
|
*/
|
|
switch (optlen) {
|
|
case 6:
|
|
ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
|
|
break;
|
|
case 8:
|
|
ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
|
|
ND_PRINT((ndo, " (elapsed time %u)", EXTRACT_16BITS(option + 6)));
|
|
break;
|
|
case 10:
|
|
ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
|
|
ND_PRINT((ndo, " (elapsed time %u)", EXTRACT_32BITS(option + 6)));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " [optlen != 6 or 8 or 10]"));
|
|
break;
|
|
}
|
|
break;
|
|
case 43:
|
|
if (optlen == 6)
|
|
ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
|
|
else if (optlen == 4)
|
|
ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
|
|
else
|
|
ND_PRINT((ndo, " [optlen != 4 or 6]"));
|
|
break;
|
|
case 44:
|
|
if (optlen > 2) {
|
|
ND_PRINT((ndo, " "));
|
|
for (i = 0; i < optlen - 2; i++)
|
|
ND_PRINT((ndo, "%02x", *(option + 2 + i)));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return optlen;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
return 0;
|
|
}
|