* SUCH DAMAGE.
*/
-#ifndef lint
-static const char rcsid[] _U_ =
-"@(#) $Header: /tcpdump/master/tcpdump/print-sctp.c,v 1.16 2004-12-15 08:43:23 guy Exp $ (NETLAB/PEL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
-#include "sctpHeader.h"
-#include "sctpConstants.h"
#include <assert.h>
#include <stdio.h>
#include "ip6.h"
#endif
+/* Definitions from:
+ *
+ * SCTP reference Implementation Copyright (C) 1999 Cisco And Motorola
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of Cisco nor of Motorola may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the SCTP reference Implementation
+ *
+ *
+ * Please send any bug reports or fixes you make to one of the following email
+ * addresses:
+ *
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorperated into the next SCTP release.
+ */
+
+/* The valid defines for all message
+ * types know to SCTP. 0 is reserved
+ */
+#define SCTP_DATA 0x00
+#define SCTP_INITIATION 0x01
+#define SCTP_INITIATION_ACK 0x02
+#define SCTP_SELECTIVE_ACK 0x03
+#define SCTP_HEARTBEAT_REQUEST 0x04
+#define SCTP_HEARTBEAT_ACK 0x05
+#define SCTP_ABORT_ASSOCIATION 0x06
+#define SCTP_SHUTDOWN 0x07
+#define SCTP_SHUTDOWN_ACK 0x08
+#define SCTP_OPERATION_ERR 0x09
+#define SCTP_COOKIE_ECHO 0x0a
+#define SCTP_COOKIE_ACK 0x0b
+#define SCTP_ECN_ECHO 0x0c
+#define SCTP_ECN_CWR 0x0d
+#define SCTP_SHUTDOWN_COMPLETE 0x0e
+#define SCTP_FORWARD_CUM_TSN 0xc0
+#define SCTP_RELIABLE_CNTL 0xc1
+#define SCTP_RELIABLE_CNTL_ACK 0xc2
+
+/* Data Chuck Specific Flags */
+#define SCTP_DATA_FRAG_MASK 0x03
+#define SCTP_DATA_MIDDLE_FRAG 0x00
+#define SCTP_DATA_LAST_FRAG 0x01
+#define SCTP_DATA_FIRST_FRAG 0x02
+#define SCTP_DATA_NOT_FRAG 0x03
+#define SCTP_DATA_UNORDERED 0x04
+
+#define SCTP_ADDRMAX 60
+
+#define CHAN_HP 6704
+#define CHAN_MP 6705
+#define CHAN_LP 6706
+
+/* the sctp common header */
+
+struct sctpHeader{
+ u_int16_t source;
+ u_int16_t destination;
+ u_int32_t verificationTag;
+ u_int32_t adler32;
+};
+
+/* various descriptor parsers */
+
+struct sctpChunkDesc{
+ u_int8_t chunkID;
+ u_int8_t chunkFlg;
+ u_int16_t chunkLength;
+};
+
+struct sctpParamDesc{
+ u_int16_t paramType;
+ u_int16_t paramLength;
+};
+
+
+struct sctpRelChunkDesc{
+ struct sctpChunkDesc chk;
+ u_int32_t serialNumber;
+};
+
+struct sctpVendorSpecificParam {
+ struct sctpParamDesc p; /* type must be 0xfffe */
+ u_int32_t vendorId; /* vendor ID from RFC 1700 */
+ u_int16_t vendorSpecificType;
+ u_int16_t vendorSpecificLen;
+};
+
+
+/* Structures for the control parts */
+
+
+
+/* Sctp association init request/ack */
+
+/* this is used for init ack, too */
+struct sctpInitiation{
+ u_int32_t initTag; /* tag of mine */
+ u_int32_t rcvWindowCredit; /* rwnd */
+ u_int16_t NumPreopenStreams; /* OS */
+ u_int16_t MaxInboundStreams; /* MIS */
+ u_int32_t initialTSN;
+ /* optional param's follow in sctpParamDesc form */
+};
+
+struct sctpV4IpAddress{
+ struct sctpParamDesc p; /* type is set to SCTP_IPV4_PARAM_TYPE, len=10 */
+ u_int32_t ipAddress;
+};
+
+
+struct sctpV6IpAddress{
+ struct sctpParamDesc p; /* type is set to SCTP_IPV6_PARAM_TYPE, len=22 */
+ u_int8_t ipAddress[16];
+};
+
+struct sctpDNSName{
+ struct sctpParamDesc param;
+ u_int8_t name[1];
+};
+
+
+struct sctpCookiePreserve{
+ struct sctpParamDesc p; /* type is set to SCTP_COOKIE_PRESERVE, len=8 */
+ u_int32_t extraTime;
+};
+
+
+struct sctpTimeStamp{
+ u_int32_t ts_sec;
+ u_int32_t ts_usec;
+};
+
+/* wire structure of my cookie */
+struct cookieMessage{
+ u_int32_t TieTag_curTag; /* copied from assoc if present */
+ u_int32_t TieTag_hisTag; /* copied from assoc if present */
+ int32_t cookieLife; /* life I will award this cookie */
+ struct sctpTimeStamp timeEnteringState; /* the time I built cookie */
+ struct sctpInitiation initAckISent; /* the INIT-ACK that I sent to my peer */
+ u_int32_t addressWhereISent[4]; /* I make this 4 ints so I get 128bits for future */
+ int32_t addrtype; /* address type */
+ u_int16_t locScope; /* V6 local scope flag */
+ u_int16_t siteScope; /* V6 site scope flag */
+ /* at the end is tacked on the INIT chunk sent in
+ * its entirety and of course our
+ * signature.
+ */
+};
+
+
+/* this guy is for use when
+ * I have a initiate message gloming the
+ * things together.
+
+ */
+struct sctpUnifiedInit{
+ struct sctpChunkDesc uh;
+ struct sctpInitiation initm;
+};
+
+struct sctpSendableInit{
+ struct sctpHeader mh;
+ struct sctpUnifiedInit msg;
+};
+
+
+/* Selective Acknowledgement
+ * has the following structure with
+ * a optional ammount of trailing int's
+ * on the last part (based on the numberOfDesc
+ * field).
+ */
+
+struct sctpSelectiveAck{
+ u_int32_t highestConseqTSN;
+ u_int32_t updatedRwnd;
+ u_int16_t numberOfdesc;
+ u_int16_t numDupTsns;
+};
+
+struct sctpSelectiveFrag{
+ u_int16_t fragmentStart;
+ u_int16_t fragmentEnd;
+};
+
+
+struct sctpUnifiedSack{
+ struct sctpChunkDesc uh;
+ struct sctpSelectiveAck sack;
+};
+
+/* for both RTT request/response the
+ * following is sent
+ */
+
+struct sctpHBrequest {
+ u_int32_t time_value_1;
+ u_int32_t time_value_2;
+};
+
+/* here is what I read and respond with to. */
+struct sctpHBunified{
+ struct sctpChunkDesc hdr;
+ struct sctpParamDesc hb;
+};
+
+
+/* here is what I send */
+struct sctpHBsender{
+ struct sctpChunkDesc hdr;
+ struct sctpParamDesc hb;
+ struct sctpHBrequest rtt;
+ int8_t addrFmt[SCTP_ADDRMAX];
+ u_int16_t userreq;
+};
+
+
+
+/* for the abort and shutdown ACK
+ * we must carry the init tag in the common header. Just the
+ * common header is all that is needed with a chunk descriptor.
+ */
+struct sctpUnifiedAbort{
+ struct sctpChunkDesc uh;
+};
+
+struct sctpUnifiedAbortLight{
+ struct sctpHeader mh;
+ struct sctpChunkDesc uh;
+};
+
+struct sctpUnifiedAbortHeavy{
+ struct sctpHeader mh;
+ struct sctpChunkDesc uh;
+ u_int16_t causeCode;
+ u_int16_t causeLen;
+};
+
+/* For the graceful shutdown we must carry
+ * the tag (in common header) and the highest consequitive acking value
+ */
+struct sctpShutdown {
+ u_int32_t TSN_Seen;
+};
+
+struct sctpUnifiedShutdown{
+ struct sctpChunkDesc uh;
+ struct sctpShutdown shut;
+};
+
+/* in the unified message we add the trailing
+ * stream id since it is the only message
+ * that is defined as a operation error.
+ */
+struct sctpOpErrorCause{
+ u_int16_t cause;
+ u_int16_t causeLen;
+};
+
+struct sctpUnifiedOpError{
+ struct sctpChunkDesc uh;
+ struct sctpOpErrorCause c;
+};
+
+struct sctpUnifiedStreamError{
+ struct sctpHeader mh;
+ struct sctpChunkDesc uh;
+ struct sctpOpErrorCause c;
+ u_int16_t strmNum;
+ u_int16_t reserved;
+};
+
+struct staleCookieMsg{
+ struct sctpHeader mh;
+ struct sctpChunkDesc uh;
+ struct sctpOpErrorCause c;
+ u_int32_t moretime;
+};
+
+/* the following is used in all sends
+ * where nothing is needed except the
+ * chunk/type i.e. shutdownAck Abort */
+
+struct sctpUnifiedSingleMsg{
+ struct sctpHeader mh;
+ struct sctpChunkDesc uh;
+};
+
+struct sctpDataPart{
+ u_int32_t TSN;
+ u_int16_t streamId;
+ u_int16_t sequence;
+ u_int32_t payloadtype;
+};
+
+struct sctpUnifiedDatagram{
+ struct sctpChunkDesc uh;
+ struct sctpDataPart dp;
+};
+
+struct sctpECN_echo{
+ struct sctpChunkDesc uh;
+ u_int32_t Lowest_TSN;
+};
+
+
+struct sctpCWR{
+ struct sctpChunkDesc uh;
+ u_int32_t TSN_reduced_at;
+};
+
+static const struct tok ForCES_channels[] = {
+ { CHAN_HP, "ForCES HP" },
+ { CHAN_MP, "ForCES MP" },
+ { CHAN_LP, "ForCES LP" },
+ { 0, NULL }
+};
+
+static inline int isForCES_port(u_short Port)
+{
+ if (Port == CHAN_HP)
+ return 1;
+ if (Port == CHAN_MP)
+ return 1;
+ if (Port == CHAN_LP)
+ return 1;
+
+ return 0;
+}
+
void sctp_print(const u_char *bp, /* beginning of sctp packet */
const u_char *bp2, /* beginning of enclosing */
u_int sctpPacketLength) /* ip packet */
#ifdef INET6
const struct ip6_hdr *ip6;
#endif
- const u_char *cp;
const void *endPacketPtr;
u_short sourcePort, destPort;
int chunkCount;
const struct sctpChunkDesc *chunkDescPtr;
const void *nextChunk;
const char *sep;
+ int isforces = 0;
+
sctpPktHdr = (const struct sctpHeader*) bp;
endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength;
else
ip6 = NULL;
#endif /*INET6*/
- cp = (const u_char *)(sctpPktHdr + 1);
- if (cp > snapend)
- {
- printf("[|sctp]");
- return;
- }
+ TCHECK(*sctpPktHdr);
if (sctpPacketLength < sizeof(struct sctpHeader))
{
}
fflush(stdout);
+ if (isForCES_port(sourcePort)) {
+ printf("[%s]", tok2str(ForCES_channels, NULL, sourcePort));
+ isforces = 1;
+ }
+ if (isForCES_port(destPort)) {
+ printf("[%s]", tok2str(ForCES_channels, NULL, destPort));
+ isforces = 1;
+ }
+
if (vflag >= 2)
sep = "\n\t";
else
chunkDescPtr = (const struct sctpChunkDesc *) nextChunk, chunkCount++)
{
- u_short align;
+ u_int16_t chunkLength;
const u_char *chunkEnd;
+ u_int16_t align;
- chunkEnd = ((const u_char*)chunkDescPtr + EXTRACT_16BITS(&chunkDescPtr->chunkLength));
+ TCHECK(*chunkDescPtr);
+ chunkLength = EXTRACT_16BITS(&chunkDescPtr->chunkLength);
+ if (chunkLength < sizeof(*chunkDescPtr)) {
+ printf("%s%d) [Bad chunk length %u]", sep, chunkCount+1, chunkLength);
+ break;
+ }
- align=EXTRACT_16BITS(&chunkDescPtr->chunkLength) % 4;
+ TCHECK2(*((u_int8_t *)chunkDescPtr), chunkLength);
+ chunkEnd = ((const u_char*)chunkDescPtr + chunkLength);
+
+ align=chunkLength % 4;
if (align != 0)
align = 4 - align;
printf("[SSEQ %u] ", EXTRACT_16BITS(&dataHdrPtr->sequence));
printf("[PPID 0x%x] ", EXTRACT_32BITS(&dataHdrPtr->payloadtype));
fflush(stdout);
-
- if (vflag >= 2) /* if verbose output is specified */
- { /* at the command line */
+ if (isforces) {
+ const u_char *payloadPtr;
+ u_int chunksize = sizeof(struct sctpDataPart)+
+ sizeof(struct sctpChunkDesc);
+ payloadPtr = (const u_char *) (dataHdrPtr + 1);
+ if (EXTRACT_16BITS(&chunkDescPtr->chunkLength) <
+ sizeof(struct sctpDataPart)+
+ sizeof(struct sctpChunkDesc)+1) {
+ /* Less than 1 byte of chunk payload */
+ printf("bogus ForCES chunk length %u]",
+ EXTRACT_16BITS(&chunkDescPtr->chunkLength));
+ return;
+ }
+
+ forces_print(payloadPtr, EXTRACT_16BITS(&chunkDescPtr->chunkLength)- chunksize);
+ } else if (vflag >= 2) { /* if verbose output is specified */
+ /* at the command line */
const u_char *payloadPtr;
printf("[Payload");
- if (!xflag && !qflag) {
+ if (!suppress_default_print) {
payloadPtr = (const u_char *) (++dataHdrPtr);
printf(":");
- if (htons(chunkDescPtr->chunkLength) <
+ if (EXTRACT_16BITS(&chunkDescPtr->chunkLength) <
sizeof(struct sctpDataPart)+
sizeof(struct sctpChunkDesc)+1) {
+ /* Less than 1 byte of chunk payload */
printf("bogus chunk length %u]",
- htons(chunkDescPtr->chunkLength));
+ EXTRACT_16BITS(&chunkDescPtr->chunkLength));
return;
}
default_print(payloadPtr,
- htons(chunkDescPtr->chunkLength) -
+ EXTRACT_16BITS(&chunkDescPtr->chunkLength) -
(sizeof(struct sctpDataPart)+
- sizeof(struct sctpChunkDesc)+1));
+ sizeof(struct sctpChunkDesc)));
} else
printf("]");
}
const struct sctpSelectiveAck *sack;
const struct sctpSelectiveFrag *frag;
int fragNo, tsnNo;
- const u_long *dupTSN;
+ const u_char *dupTSN;
printf("[SACK] ");
sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1);
/* print duplicate TSNs */
- for (dupTSN = (const u_long*)frag, tsnNo=0;
+ for (dupTSN = (const u_char *)frag, tsnNo=0;
(const void *) dupTSN < nextChunk && tsnNo<EXTRACT_16BITS(&sack->numDupTsns);
- dupTSN++, tsnNo++)
+ dupTSN += 4, tsnNo++)
printf("\n\t\t[dup TSN #%u: %u] ", tsnNo+1,
EXTRACT_32BITS(dupTSN));
break;
}
case SCTP_HEARTBEAT_REQUEST :
- {
- const struct sctpHBsender *hb;
-
- hb=(const struct sctpHBsender*)chunkDescPtr;
-
- printf("[HB REQ] ");
-
- break;
- }
+ printf("[HB REQ] ");
+ break;
case SCTP_HEARTBEAT_ACK :
printf("[HB ACK] ");
break;
if (vflag < 2)
sep = ", (";
}
+ return;
+
+trunc:
+ printf("[|sctp]");
+ return;
}
projects / tcpdump / blobdiff