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-rw-r--r--contrib/tcpdump/print-sctp.c359
1 files changed, 359 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-sctp.c b/contrib/tcpdump/print-sctp.c
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+++ b/contrib/tcpdump/print-sctp.c
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+/* Copyright (c) 2001 NETLAB, Temple University
+ * Copyright (c) 2001 Protocol Engineering Lab, University of Delaware
+ *
+ * Jerry Heinz <gheinz@astro.temple.edu>
+ * John Fiore <jfiore@joda.cis.temple.edu>
+ * Armando L. Caro Jr. <acaro@cis.udel.edu>
+ *
+ * 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 the University nor of the Laboratory 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.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+"@(#) $Header: /tcpdump/master/tcpdump/print-sctp.c,v 1.21 2007-09-13 18:03:49 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 <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h" /* must come after interface.h */
+#include "ip.h"
+#ifdef INET6
+#include "ip6.h"
+#endif
+
+void sctp_print(const u_char *bp, /* beginning of sctp packet */
+ const u_char *bp2, /* beginning of enclosing */
+ u_int sctpPacketLength) /* ip packet */
+{
+ const struct sctpHeader *sctpPktHdr;
+ const struct ip *ip;
+#ifdef INET6
+ const struct ip6_hdr *ip6;
+#endif
+ const void *endPacketPtr;
+ u_short sourcePort, destPort;
+ int chunkCount;
+ const struct sctpChunkDesc *chunkDescPtr;
+ const void *nextChunk;
+ const char *sep;
+
+ sctpPktHdr = (const struct sctpHeader*) bp;
+ endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength;
+
+ if( (u_long) endPacketPtr > (u_long) snapend)
+ endPacketPtr = (const void *) snapend;
+ ip = (struct ip *)bp2;
+#ifdef INET6
+ if (IP_V(ip) == 6)
+ ip6 = (const struct ip6_hdr *)bp2;
+ else
+ ip6 = NULL;
+#endif /*INET6*/
+ TCHECK(*sctpPktHdr);
+
+ if (sctpPacketLength < sizeof(struct sctpHeader))
+ {
+ (void)printf("truncated-sctp - %ld bytes missing!",
+ (long)sctpPacketLength-sizeof(struct sctpHeader));
+ return;
+ }
+
+ /* sctpPacketLength -= sizeof(struct sctpHeader); packet length */
+ /* is now only as long as the payload */
+
+ sourcePort = EXTRACT_16BITS(&sctpPktHdr->source);
+ destPort = EXTRACT_16BITS(&sctpPktHdr->destination);
+
+#ifdef INET6
+ if (ip6) {
+ (void)printf("%s.%d > %s.%d: sctp",
+ ip6addr_string(&ip6->ip6_src),
+ sourcePort,
+ ip6addr_string(&ip6->ip6_dst),
+ destPort);
+ } else
+#endif /*INET6*/
+ {
+ (void)printf("%s.%d > %s.%d: sctp",
+ ipaddr_string(&ip->ip_src),
+ sourcePort,
+ ipaddr_string(&ip->ip_dst),
+ destPort);
+ }
+ fflush(stdout);
+
+ if (vflag >= 2)
+ sep = "\n\t";
+ else
+ sep = " (";
+ /* cycle through all chunks, printing information on each one */
+ for (chunkCount = 0,
+ chunkDescPtr = (const struct sctpChunkDesc *)
+ ((const u_char*) sctpPktHdr + sizeof(struct sctpHeader));
+ chunkDescPtr != NULL &&
+ ( (const void *)
+ ((const u_char *) chunkDescPtr + sizeof(struct sctpChunkDesc))
+ <= endPacketPtr);
+
+ chunkDescPtr = (const struct sctpChunkDesc *) nextChunk, chunkCount++)
+ {
+ u_int16_t chunkLength;
+ const u_char *chunkEnd;
+ u_int16_t align;
+
+ TCHECK(*chunkDescPtr);
+ chunkLength = EXTRACT_16BITS(&chunkDescPtr->chunkLength);
+ if (chunkLength < sizeof(*chunkDescPtr)) {
+ printf("%s%d) [Bad chunk length %u]", sep, chunkCount+1, chunkLength);
+ break;
+ }
+
+ TCHECK2(*((u_int8_t *)chunkDescPtr), chunkLength);
+ chunkEnd = ((const u_char*)chunkDescPtr + chunkLength);
+
+ align=chunkLength % 4;
+ if (align != 0)
+ align = 4 - align;
+
+ nextChunk = (const void *) (chunkEnd + align);
+
+ printf("%s%d) ", sep, chunkCount+1);
+ switch (chunkDescPtr->chunkID)
+ {
+ case SCTP_DATA :
+ {
+ const struct sctpDataPart *dataHdrPtr;
+
+ printf("[DATA] ");
+
+ if ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
+ == SCTP_DATA_UNORDERED)
+ printf("(U)");
+
+ if ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
+ == SCTP_DATA_FIRST_FRAG)
+ printf("(B)");
+
+ if ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
+ == SCTP_DATA_LAST_FRAG)
+ printf("(E)");
+
+ if( ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
+ == SCTP_DATA_UNORDERED)
+ ||
+ ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
+ == SCTP_DATA_FIRST_FRAG)
+ ||
+ ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
+ == SCTP_DATA_LAST_FRAG) )
+ printf(" ");
+
+ dataHdrPtr=(const struct sctpDataPart*)(chunkDescPtr+1);
+
+ printf("[TSN: %u] ", EXTRACT_32BITS(&dataHdrPtr->TSN));
+ printf("[SID: %u] ", EXTRACT_16BITS(&dataHdrPtr->streamId));
+ 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 */
+ const u_char *payloadPtr;
+
+ printf("[Payload");
+
+ if (!suppress_default_print) {
+ payloadPtr = (const u_char *) (++dataHdrPtr);
+ printf(":");
+ if (htons(chunkDescPtr->chunkLength) <
+ sizeof(struct sctpDataPart)+
+ sizeof(struct sctpChunkDesc)+1) {
+ /* Less than 1 byte of chunk payload */
+ printf("bogus chunk length %u]",
+ htons(chunkDescPtr->chunkLength));
+ return;
+ }
+ default_print(payloadPtr,
+ htons(chunkDescPtr->chunkLength) -
+ (sizeof(struct sctpDataPart)+
+ sizeof(struct sctpChunkDesc)));
+ } else
+ printf("]");
+ }
+ break;
+ }
+ case SCTP_INITIATION :
+ {
+ const struct sctpInitiation *init;
+
+ printf("[INIT] ");
+ init=(const struct sctpInitiation*)(chunkDescPtr+1);
+ printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag));
+ printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit));
+ printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams));
+ printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams));
+ printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN));
+
+#if(0) /* ALC you can add code for optional params here */
+ if( (init+1) < chunkEnd )
+ printf(" @@@@@ UNFINISHED @@@@@@%s\n",
+ "Optional params present, but not printed.");
+#endif
+ break;
+ }
+ case SCTP_INITIATION_ACK :
+ {
+ const struct sctpInitiation *init;
+
+ printf("[INIT ACK] ");
+ init=(const struct sctpInitiation*)(chunkDescPtr+1);
+ printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag));
+ printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit));
+ printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams));
+ printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams));
+ printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN));
+
+#if(0) /* ALC you can add code for optional params here */
+ if( (init+1) < chunkEnd )
+ printf(" @@@@@ UNFINISHED @@@@@@%s\n",
+ "Optional params present, but not printed.");
+#endif
+ break;
+ }
+ case SCTP_SELECTIVE_ACK:
+ {
+ const struct sctpSelectiveAck *sack;
+ const struct sctpSelectiveFrag *frag;
+ int fragNo, tsnNo;
+ const u_char *dupTSN;
+
+ printf("[SACK] ");
+ sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1);
+ printf("[cum ack %u] ", EXTRACT_32BITS(&sack->highestConseqTSN));
+ printf("[a_rwnd %u] ", EXTRACT_32BITS(&sack->updatedRwnd));
+ printf("[#gap acks %u] ", EXTRACT_16BITS(&sack->numberOfdesc));
+ printf("[#dup tsns %u] ", EXTRACT_16BITS(&sack->numDupTsns));
+
+
+ /* print gaps */
+ for (frag = ( (const struct sctpSelectiveFrag *)
+ ((const struct sctpSelectiveAck *) sack+1)),
+ fragNo=0;
+ (const void *)frag < nextChunk && fragNo < EXTRACT_16BITS(&sack->numberOfdesc);
+ frag++, fragNo++)
+ printf("\n\t\t[gap ack block #%d: start = %u, end = %u] ",
+ fragNo+1,
+ EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentStart),
+ EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentEnd));
+
+
+ /* print duplicate TSNs */
+ for (dupTSN = (const u_char *)frag, tsnNo=0;
+ (const void *) dupTSN < nextChunk && tsnNo<EXTRACT_16BITS(&sack->numDupTsns);
+ 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;
+ }
+ case SCTP_HEARTBEAT_ACK :
+ printf("[HB ACK] ");
+ break;
+ case SCTP_ABORT_ASSOCIATION :
+ printf("[ABORT] ");
+ break;
+ case SCTP_SHUTDOWN :
+ printf("[SHUTDOWN] ");
+ break;
+ case SCTP_SHUTDOWN_ACK :
+ printf("[SHUTDOWN ACK] ");
+ break;
+ case SCTP_OPERATION_ERR :
+ printf("[OP ERR] ");
+ break;
+ case SCTP_COOKIE_ECHO :
+ printf("[COOKIE ECHO] ");
+ break;
+ case SCTP_COOKIE_ACK :
+ printf("[COOKIE ACK] ");
+ break;
+ case SCTP_ECN_ECHO :
+ printf("[ECN ECHO] ");
+ break;
+ case SCTP_ECN_CWR :
+ printf("[ECN CWR] ");
+ break;
+ case SCTP_SHUTDOWN_COMPLETE :
+ printf("[SHUTDOWN COMPLETE] ");
+ break;
+ case SCTP_FORWARD_CUM_TSN :
+ printf("[FOR CUM TSN] ");
+ break;
+ case SCTP_RELIABLE_CNTL :
+ printf("[REL CTRL] ");
+ break;
+ case SCTP_RELIABLE_CNTL_ACK :
+ printf("[REL CTRL ACK] ");
+ break;
+ default :
+ printf("[Unknown chunk type: 0x%x]", chunkDescPtr->chunkID);
+ return;
+ }
+
+ if (vflag < 2)
+ sep = ", (";
+ }
+ return;
+
+trunc:
+ printf("[|sctp]");
+ return;
+}
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