X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/735692ad425ae79d2d388826d63fcdc33a8d1674..39d15607cad1b4b463794c1a67873f6182dc52f7:/print-sctp.c diff --git a/print-sctp.c b/print-sctp.c index 05c753a5..dc7916b3 100644 --- a/print-sctp.c +++ b/print-sctp.c @@ -33,19 +33,12 @@ * 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 -#include "sctpHeader.h" -#include "sctpConstants.h" #include #include @@ -59,6 +52,365 @@ static const char rcsid[] _U_ = #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: + * + * rstewar1@email.mot.com + * kmorneau@cisco.com + * qxie1@email.mot.com + * + * 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 */ @@ -74,6 +426,8 @@ void sctp_print(const u_char *bp, /* beginning of sctp packet */ const struct sctpChunkDesc *chunkDescPtr; const void *nextChunk; const char *sep; + int isforces = 0; + sctpPktHdr = (const struct sctpHeader*) bp; endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength; @@ -120,6 +474,15 @@ void sctp_print(const u_char *bp, /* beginning of sctp packet */ } 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 @@ -193,9 +556,23 @@ void sctp_print(const u_char *bp, /* beginning of sctp packet */ 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"); @@ -203,16 +580,16 @@ void sctp_print(const u_char *bp, /* beginning of sctp packet */ 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))); } else @@ -295,15 +672,8 @@ void sctp_print(const u_char *bp, /* beginning of sctp packet */ 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;