* SUCH DAMAGE.
*/
-#define NETDISSECT_REWORKED
+/* \summary: Stream Control Transmission Protocol (SCTP) printer */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
-#include "extract.h" /* must come after interface.h */
+#include "extract.h"
#include "ip.h"
-#ifdef INET6
#include "ip6.h"
-#endif
/* Definitions from:
*
*
* Any bugs reported given to us we will try to fix... any fixes shared will
- * be incorperated into the next SCTP release.
+ * be incorporated into the next SCTP release.
*/
/* The valid defines for all message
/* the sctp common header */
struct sctpHeader{
- uint16_t source;
- uint16_t destination;
- uint32_t verificationTag;
- uint32_t adler32;
+ nd_uint16_t source;
+ nd_uint16_t destination;
+ nd_uint32_t verificationTag;
+ nd_uint32_t adler32;
};
/* various descriptor parsers */
struct sctpChunkDesc{
- uint8_t chunkID;
- uint8_t chunkFlg;
- uint16_t chunkLength;
+ nd_uint8_t chunkID;
+ nd_uint8_t chunkFlg;
+ nd_uint16_t chunkLength;
};
struct sctpParamDesc{
- uint16_t paramType;
- uint16_t paramLength;
+ nd_uint16_t paramType;
+ nd_uint16_t paramLength;
};
struct sctpRelChunkDesc{
struct sctpChunkDesc chk;
- uint32_t serialNumber;
+ nd_uint32_t serialNumber;
};
struct sctpVendorSpecificParam {
struct sctpParamDesc p; /* type must be 0xfffe */
- uint32_t vendorId; /* vendor ID from RFC 1700 */
- uint16_t vendorSpecificType;
- uint16_t vendorSpecificLen;
+ nd_uint32_t vendorId; /* vendor ID from RFC 1700 */
+ nd_uint16_t vendorSpecificType;
+ nd_uint16_t vendorSpecificLen;
};
/* this is used for init ack, too */
struct sctpInitiation{
- uint32_t initTag; /* tag of mine */
- uint32_t rcvWindowCredit; /* rwnd */
- uint16_t NumPreopenStreams; /* OS */
- uint16_t MaxInboundStreams; /* MIS */
- uint32_t initialTSN;
+ nd_uint32_t initTag; /* tag of mine */
+ nd_uint32_t rcvWindowCredit; /* rwnd */
+ nd_uint16_t NumPreopenStreams; /* OS */
+ nd_uint16_t MaxInboundStreams; /* MIS */
+ nd_uint32_t initialTSN;
/* optional param's follow in sctpParamDesc form */
};
struct sctpV4IpAddress{
struct sctpParamDesc p; /* type is set to SCTP_IPV4_PARAM_TYPE, len=10 */
- uint32_t ipAddress;
+ nd_ipv4 ipAddress;
};
struct sctpV6IpAddress{
struct sctpParamDesc p; /* type is set to SCTP_IPV6_PARAM_TYPE, len=22 */
- uint8_t ipAddress[16];
+ nd_ipv6 ipAddress;
};
struct sctpDNSName{
struct sctpParamDesc param;
- uint8_t name[1];
+ nd_byte name[1];
};
struct sctpCookiePreserve{
struct sctpParamDesc p; /* type is set to SCTP_COOKIE_PRESERVE, len=8 */
- uint32_t extraTime;
+ nd_uint32_t extraTime;
};
struct sctpTimeStamp{
- uint32_t ts_sec;
- uint32_t ts_usec;
-};
-
-/* wire structure of my cookie */
-struct cookieMessage{
- uint32_t TieTag_curTag; /* copied from assoc if present */
- uint32_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 */
- uint32_t addressWhereISent[4]; /* I make this 4 ints so I get 128bits for future */
- int32_t addrtype; /* address type */
- uint16_t locScope; /* V6 local scope flag */
- uint16_t siteScope; /* V6 site scope flag */
- /* at the end is tacked on the INIT chunk sent in
- * its entirety and of course our
- * signature.
- */
+ nd_uint32_t ts_sec;
+ nd_uint32_t ts_usec;
};
/* Selective Acknowledgement
* has the following structure with
- * a optional ammount of trailing int's
+ * a optional amount of trailing int's
* on the last part (based on the numberOfDesc
* field).
*/
struct sctpSelectiveAck{
- uint32_t highestConseqTSN;
- uint32_t updatedRwnd;
- uint16_t numberOfdesc;
- uint16_t numDupTsns;
+ nd_uint32_t highestConseqTSN;
+ nd_uint32_t updatedRwnd;
+ nd_uint16_t numberOfdesc;
+ nd_uint16_t numDupTsns;
};
struct sctpSelectiveFrag{
- uint16_t fragmentStart;
- uint16_t fragmentEnd;
+ nd_uint16_t fragmentStart;
+ nd_uint16_t fragmentEnd;
};
struct sctpSelectiveAck sack;
};
-/* for both RTT request/response the
- * following is sent
- */
-
-struct sctpHBrequest {
- uint32_t time_value_1;
- uint32_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];
- uint16_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 sctpUnifiedAbortHeavy{
struct sctpHeader mh;
struct sctpChunkDesc uh;
- uint16_t causeCode;
- uint16_t causeLen;
+ nd_uint16_t causeCode;
+ nd_uint16_t causeLen;
};
/* For the graceful shutdown we must carry
* the tag (in common header) and the highest consequitive acking value
*/
struct sctpShutdown {
- uint32_t TSN_Seen;
+ nd_uint32_t TSN_Seen;
};
struct sctpUnifiedShutdown{
* that is defined as a operation error.
*/
struct sctpOpErrorCause{
- uint16_t cause;
- uint16_t causeLen;
+ nd_uint16_t cause;
+ nd_uint16_t causeLen;
};
struct sctpUnifiedOpError{
struct sctpHeader mh;
struct sctpChunkDesc uh;
struct sctpOpErrorCause c;
- uint16_t strmNum;
- uint16_t reserved;
+ nd_uint16_t strmNum;
+ nd_uint16_t reserved;
};
struct staleCookieMsg{
struct sctpHeader mh;
struct sctpChunkDesc uh;
struct sctpOpErrorCause c;
- uint32_t moretime;
+ nd_uint32_t moretime;
};
/* the following is used in all sends
};
struct sctpDataPart{
- uint32_t TSN;
- uint16_t streamId;
- uint16_t sequence;
- uint32_t payloadtype;
+ nd_uint32_t TSN;
+ nd_uint16_t streamId;
+ nd_uint16_t sequence;
+ nd_uint32_t payloadtype;
};
struct sctpUnifiedDatagram{
struct sctpECN_echo{
struct sctpChunkDesc uh;
- uint32_t Lowest_TSN;
+ nd_uint32_t Lowest_TSN;
};
struct sctpCWR{
struct sctpChunkDesc uh;
- uint32_t TSN_reduced_at;
+ nd_uint32_t TSN_reduced_at;
};
static const struct tok ForCES_channels[] = {
};
-static inline int isForCES_port(u_short Port)
+static int
+isForCES_port(u_short Port)
{
if (Port == CHAN_HP)
return 1;
return 0;
}
-void sctp_print(netdissect_options *ndo,
- const u_char *bp, /* beginning of sctp packet */
- const u_char *bp2, /* beginning of enclosing */
- u_int sctpPacketLength) /* ip packet */
+void
+sctp_print(netdissect_options *ndo,
+ const u_char *bp, /* beginning of sctp packet */
+ const u_char *bp2, /* beginning of enclosing */
+ u_int sctpPacketLength) /* ip packet */
{
+ u_int sctpPacketLengthRemaining;
const struct sctpHeader *sctpPktHdr;
const struct ip *ip;
-#ifdef INET6
const struct ip6_hdr *ip6;
-#endif
- const void *endPacketPtr;
+ uint8_t chunkID;
u_short sourcePort, destPort;
- int chunkCount;
+ u_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;
-
- if( (u_long) endPacketPtr > (u_long) ndo->ndo_snapend)
- endPacketPtr = (const void *) ndo->ndo_snapend;
- ip = (struct ip *)bp2;
-#ifdef INET6
- if (IP_V(ip) == 6)
- ip6 = (const struct ip6_hdr *)bp2;
- else
- ip6 = NULL;
-#endif /*INET6*/
- ND_TCHECK(*sctpPktHdr);
-
+ ndo->ndo_protocol = "sctp";
if (sctpPacketLength < sizeof(struct sctpHeader))
{
- ND_PRINT((ndo, "truncated-sctp - %ld bytes missing!",
- (long)sctpPacketLength-sizeof(struct sctpHeader)));
+ ND_PRINT("truncated-sctp - %ld bytes missing!",
+ (long)(sizeof(struct sctpHeader) - sctpPacketLength));
return;
}
+ sctpPktHdr = (const struct sctpHeader*) bp;
+ ND_TCHECK_SIZE(sctpPktHdr);
+ sctpPacketLengthRemaining = sctpPacketLength;
- /* sctpPacketLength -= sizeof(struct sctpHeader); packet length */
- /* is now only as long as the payload */
+ sourcePort = GET_BE_U_2(sctpPktHdr->source);
+ destPort = GET_BE_U_2(sctpPktHdr->destination);
- sourcePort = EXTRACT_16BITS(&sctpPktHdr->source);
- destPort = EXTRACT_16BITS(&sctpPktHdr->destination);
+ ip = (const struct ip *)bp2;
+ if (IP_V(ip) == 6)
+ ip6 = (const struct ip6_hdr *)bp2;
+ else
+ ip6 = NULL;
-#ifdef INET6
if (ip6) {
- ND_PRINT((ndo, "%s.%d > %s.%d: sctp",
- ip6addr_string(ndo, &ip6->ip6_src),
+ ND_PRINT("%s.%u > %s.%u: sctp",
+ ip6addr_string(ndo, ip6->ip6_src),
sourcePort,
- ip6addr_string(ndo, &ip6->ip6_dst),
- destPort));
+ ip6addr_string(ndo, ip6->ip6_dst),
+ destPort);
} else
-#endif /*INET6*/
{
- ND_PRINT((ndo, "%s.%d > %s.%d: sctp",
- ipaddr_string(ndo, &ip->ip_src),
+ ND_PRINT("%s.%u > %s.%u: sctp",
+ ipaddr_string(ndo, ip->ip_src),
sourcePort,
- ipaddr_string(ndo, &ip->ip_dst),
- destPort));
+ ipaddr_string(ndo, ip->ip_dst),
+ destPort);
}
if (isForCES_port(sourcePort)) {
- ND_PRINT((ndo, "[%s]", tok2str(ForCES_channels, NULL, sourcePort)));
- isforces = 1;
+ ND_PRINT("[%s]", tok2str(ForCES_channels, NULL, sourcePort));
+ isforces = 1;
}
if (isForCES_port(destPort)) {
- ND_PRINT((ndo, "[%s]", tok2str(ForCES_channels, NULL, destPort)));
- isforces = 1;
+ ND_PRINT("[%s]", tok2str(ForCES_channels, NULL, destPort));
+ isforces = 1;
}
+ bp += sizeof(struct sctpHeader);
+ sctpPacketLengthRemaining -= sizeof(struct sctpHeader);
+
if (ndo->ndo_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++)
+ for (chunkCount = 0, chunkDescPtr = (const struct sctpChunkDesc *)bp;
+ sctpPacketLengthRemaining != 0;
+ chunkCount++)
{
- uint16_t chunkLength;
- const u_char *chunkEnd;
+ uint16_t chunkLength, chunkLengthRemaining;
uint16_t align;
- ND_TCHECK(*chunkDescPtr);
- chunkLength = EXTRACT_16BITS(&chunkDescPtr->chunkLength);
+ chunkDescPtr = (const struct sctpChunkDesc *)bp;
+ if (sctpPacketLengthRemaining < sizeof(*chunkDescPtr)) {
+ ND_PRINT("%s%u) [chunk descriptor cut off at end of packet]", sep, chunkCount+1);
+ break;
+ }
+ ND_TCHECK_SIZE(chunkDescPtr);
+ chunkLength = GET_BE_U_2(chunkDescPtr->chunkLength);
if (chunkLength < sizeof(*chunkDescPtr)) {
- ND_PRINT((ndo, "%s%d) [Bad chunk length %u]", sep, chunkCount+1, chunkLength));
- break;
+ ND_PRINT("%s%u) [Bad chunk length %u, < size of chunk descriptor]", sep, chunkCount+1, chunkLength);
+ break;
}
+ chunkLengthRemaining = chunkLength;
- ND_TCHECK2(*((uint8_t *)chunkDescPtr), chunkLength);
- chunkEnd = ((const u_char*)chunkDescPtr + chunkLength);
-
- align=chunkLength % 4;
+ align = chunkLength % 4;
if (align != 0)
align = 4 - align;
- nextChunk = (const void *) (chunkEnd + align);
+ if (sctpPacketLengthRemaining < align) {
+ ND_PRINT("%s%u) [Bad chunk length %u, > remaining data in packet]", sep, chunkCount+1, chunkLength);
+ break;
+ }
+
+ ND_TCHECK_LEN(bp, chunkLength);
+
+ bp += sizeof(*chunkDescPtr);
+ sctpPacketLengthRemaining -= sizeof(*chunkDescPtr);
+ chunkLengthRemaining -= sizeof(*chunkDescPtr);
- ND_PRINT((ndo, "%s%d) ", sep, chunkCount+1));
- ND_PRINT((ndo, "[%s] ", tok2str(sctp_chunkid_str, "Unknown chunk type: 0x%x",
- chunkDescPtr->chunkID)));
- switch (chunkDescPtr->chunkID)
+ ND_PRINT("%s%u) ", sep, chunkCount+1);
+ chunkID = GET_U_1(chunkDescPtr->chunkID);
+ ND_PRINT("[%s] ", tok2str(sctp_chunkid_str, "Unknown chunk type: 0x%x",
+ chunkID));
+ switch (chunkID)
{
case SCTP_DATA :
{
const struct sctpDataPart *dataHdrPtr;
+ uint8_t chunkFlg;
uint32_t ppid;
- const u_char *payloadPtr;
- u_int payload_size;
-
- if ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
- == SCTP_DATA_UNORDERED)
- ND_PRINT((ndo, "(U)"));
-
- if ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
- == SCTP_DATA_FIRST_FRAG)
- ND_PRINT((ndo, "(B)"));
-
- if ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
- == SCTP_DATA_LAST_FRAG)
- ND_PRINT((ndo, "(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) )
- ND_PRINT((ndo, " "));
-
- dataHdrPtr=(const struct sctpDataPart*)(chunkDescPtr+1);
-
- ppid = EXTRACT_32BITS(&dataHdrPtr->payloadtype);
- ND_PRINT((ndo, "[TSN: %u] ", EXTRACT_32BITS(&dataHdrPtr->TSN)));
- ND_PRINT((ndo, "[SID: %u] ", EXTRACT_16BITS(&dataHdrPtr->streamId)));
- ND_PRINT((ndo, "[SSEQ %u] ", EXTRACT_16BITS(&dataHdrPtr->sequence)));
- ND_PRINT((ndo, "[PPID %s] ",
- tok2str(PayloadProto_idents, "0x%x", ppid)));
+ uint16_t payload_size;
+
+ chunkFlg = GET_U_1(chunkDescPtr->chunkFlg);
+ if ((chunkFlg & SCTP_DATA_UNORDERED) == SCTP_DATA_UNORDERED)
+ ND_PRINT("(U)");
+
+ if ((chunkFlg & SCTP_DATA_FIRST_FRAG) == SCTP_DATA_FIRST_FRAG)
+ ND_PRINT("(B)");
+
+ if ((chunkFlg & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG)
+ ND_PRINT("(E)");
+
+ if( ((chunkFlg & SCTP_DATA_UNORDERED) == SCTP_DATA_UNORDERED) ||
+ ((chunkFlg & SCTP_DATA_FIRST_FRAG) == SCTP_DATA_FIRST_FRAG) ||
+ ((chunkFlg & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) )
+ ND_PRINT(" ");
+
+ if (chunkLengthRemaining < sizeof(*dataHdrPtr)) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
+ return;
+ }
+ dataHdrPtr=(const struct sctpDataPart*)bp;
+
+ ppid = GET_BE_U_4(dataHdrPtr->payloadtype);
+ ND_PRINT("[TSN: %u] ", GET_BE_U_4(dataHdrPtr->TSN));
+ ND_PRINT("[SID: %u] ", GET_BE_U_2(dataHdrPtr->streamId));
+ ND_PRINT("[SSEQ %u] ", GET_BE_U_2(dataHdrPtr->sequence));
+ ND_PRINT("[PPID %s] ",
+ tok2str(PayloadProto_idents, "0x%x", ppid));
if (!isforces) {
isforces = (ppid == SCTP_PPID_FORCES_HP) ||
(ppid == SCTP_PPID_FORCES_LP);
}
- payloadPtr = (const u_char *) (dataHdrPtr + 1);
- if (EXTRACT_16BITS(&chunkDescPtr->chunkLength) <
- sizeof(struct sctpDataPart) + sizeof(struct sctpChunkDesc) + 1) {
- ND_PRINT((ndo, "bogus chunk length %u]", EXTRACT_16BITS(&chunkDescPtr->chunkLength)));
+ bp += sizeof(*dataHdrPtr);
+ sctpPacketLengthRemaining -= sizeof(*dataHdrPtr);
+ chunkLengthRemaining -= sizeof(*dataHdrPtr);
+ payload_size = chunkLengthRemaining;
+ if (payload_size == 0) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
return;
}
- payload_size = EXTRACT_16BITS(&chunkDescPtr->chunkLength) -
- (sizeof(struct sctpDataPart) + sizeof(struct sctpChunkDesc));
-
if (isforces) {
- forces_print(ndo, payloadPtr, payload_size);
+ forces_print(ndo, bp, payload_size);
+ /* ndo_protocol reassignment after forces_print() call */
+ ndo->ndo_protocol = "sctp";
} else if (ndo->ndo_vflag >= 2) { /* if verbose output is specified */
/* at the command line */
switch (ppid) {
case SCTP_PPID_M3UA :
- m3ua_print(ndo, payloadPtr, payload_size);
+ m3ua_print(ndo, bp, payload_size);
+ /* ndo_protocol reassignment after m3ua_print() call */
+ ndo->ndo_protocol = "sctp";
break;
default:
- ND_PRINT((ndo, "[Payload"));
+ ND_PRINT("[Payload");
if (!ndo->ndo_suppress_default_print) {
- ND_PRINT((ndo, ":"));
- ND_DEFAULTPRINT(payloadPtr, payload_size);
+ ND_PRINT(":");
+ ND_DEFAULTPRINT(bp, payload_size);
}
- ND_PRINT((ndo, "]"));
+ ND_PRINT("]");
break;
}
}
+ bp += payload_size;
+ sctpPacketLengthRemaining -= payload_size;
+ chunkLengthRemaining -= payload_size;
break;
}
case SCTP_INITIATION :
{
const struct sctpInitiation *init;
- init=(const struct sctpInitiation*)(chunkDescPtr+1);
- ND_PRINT((ndo, "[init tag: %u] ", EXTRACT_32BITS(&init->initTag)));
- ND_PRINT((ndo, "[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit)));
- ND_PRINT((ndo, "[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams)));
- ND_PRINT((ndo, "[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams)));
- ND_PRINT((ndo, "[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN)));
-
-#if(0) /* ALC you can add code for optional params here */
- if( (init+1) < chunkEnd )
- ND_PRINT((ndo, " @@@@@ UNFINISHED @@@@@@%s\n",
- "Optional params present, but not printed."));
+ if (chunkLengthRemaining < sizeof(*init)) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
+ return;
+ }
+ init=(const struct sctpInitiation*)bp;
+ ND_PRINT("[init tag: %u] ", GET_BE_U_4(init->initTag));
+ ND_PRINT("[rwnd: %u] ", GET_BE_U_4(init->rcvWindowCredit));
+ ND_PRINT("[OS: %u] ", GET_BE_U_2(init->NumPreopenStreams));
+ ND_PRINT("[MIS: %u] ", GET_BE_U_2(init->MaxInboundStreams));
+ ND_PRINT("[init TSN: %u] ", GET_BE_U_4(init->initialTSN));
+ bp += sizeof(*init);
+ sctpPacketLengthRemaining -= sizeof(*init);
+ chunkLengthRemaining -= sizeof(*init);
+
+#if 0 /* ALC you can add code for optional params here */
+ if( chunkLengthRemaining != 0 )
+ ND_PRINT(" @@@@@ UNFINISHED @@@@@@%s\n",
+ "Optional params present, but not printed.");
#endif
+ bp += chunkLengthRemaining;
+ sctpPacketLengthRemaining -= chunkLengthRemaining;
+ chunkLengthRemaining = 0;
break;
}
case SCTP_INITIATION_ACK :
{
const struct sctpInitiation *init;
- init=(const struct sctpInitiation*)(chunkDescPtr+1);
- ND_PRINT((ndo, "[init tag: %u] ", EXTRACT_32BITS(&init->initTag)));
- ND_PRINT((ndo, "[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit)));
- ND_PRINT((ndo, "[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams)));
- ND_PRINT((ndo, "[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams)));
- ND_PRINT((ndo, "[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN)));
-
-#if(0) /* ALC you can add code for optional params here */
- if( (init+1) < chunkEnd )
- ND_PRINT((ndo, " @@@@@ UNFINISHED @@@@@@%s\n",
- "Optional params present, but not printed."));
+ if (chunkLengthRemaining < sizeof(*init)) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
+ return;
+ }
+ init=(const struct sctpInitiation*)bp;
+ ND_PRINT("[init tag: %u] ", GET_BE_U_4(init->initTag));
+ ND_PRINT("[rwnd: %u] ", GET_BE_U_4(init->rcvWindowCredit));
+ ND_PRINT("[OS: %u] ", GET_BE_U_2(init->NumPreopenStreams));
+ ND_PRINT("[MIS: %u] ", GET_BE_U_2(init->MaxInboundStreams));
+ ND_PRINT("[init TSN: %u] ", GET_BE_U_4(init->initialTSN));
+ bp += sizeof(*init);
+ sctpPacketLengthRemaining -= sizeof(*init);
+ chunkLengthRemaining -= sizeof(*init);
+
+#if 0 /* ALC you can add code for optional params here */
+ if( chunkLengthRemaining != 0 )
+ ND_PRINT(" @@@@@ UNFINISHED @@@@@@%s\n",
+ "Optional params present, but not printed.");
#endif
+ bp += chunkLengthRemaining;
+ sctpPacketLengthRemaining -= chunkLengthRemaining;
+ chunkLengthRemaining = 0;
break;
}
case SCTP_SELECTIVE_ACK:
{
const struct sctpSelectiveAck *sack;
const struct sctpSelectiveFrag *frag;
- int fragNo, tsnNo;
+ u_int fragNo, tsnNo;
const u_char *dupTSN;
- sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1);
- ND_PRINT((ndo, "[cum ack %u] ", EXTRACT_32BITS(&sack->highestConseqTSN)));
- ND_PRINT((ndo, "[a_rwnd %u] ", EXTRACT_32BITS(&sack->updatedRwnd)));
- ND_PRINT((ndo, "[#gap acks %u] ", EXTRACT_16BITS(&sack->numberOfdesc)));
- ND_PRINT((ndo, "[#dup tsns %u] ", EXTRACT_16BITS(&sack->numDupTsns)));
+ if (chunkLengthRemaining < sizeof(*sack)) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
+ return;
+ }
+ sack=(const struct sctpSelectiveAck*)bp;
+ ND_PRINT("[cum ack %u] ", GET_BE_U_4(sack->highestConseqTSN));
+ ND_PRINT("[a_rwnd %u] ", GET_BE_U_4(sack->updatedRwnd));
+ ND_PRINT("[#gap acks %u] ", GET_BE_U_2(sack->numberOfdesc));
+ ND_PRINT("[#dup tsns %u] ", GET_BE_U_2(sack->numDupTsns));
+ bp += sizeof(*sack);
+ sctpPacketLengthRemaining -= sizeof(*sack);
+ chunkLengthRemaining -= sizeof(*sack);
/* 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++)
- ND_PRINT((ndo, "\n\t\t[gap ack block #%d: start = %u, end = %u] ",
+ for (fragNo=0;
+ chunkLengthRemaining != 0 && fragNo < GET_BE_U_2(sack->numberOfdesc);
+ bp += sizeof(*frag), sctpPacketLengthRemaining -= sizeof(*frag), chunkLengthRemaining -= sizeof(*frag), fragNo++) {
+ if (chunkLengthRemaining < sizeof(*frag)) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
+ return;
+ }
+ frag = (const struct sctpSelectiveFrag *)bp;
+ ND_PRINT("\n\t\t[gap ack block #%u: start = %u, end = %u] ",
fragNo+1,
- EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentStart),
- EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentEnd)));
-
+ GET_BE_U_4(sack->highestConseqTSN) + GET_BE_U_2(frag->fragmentStart),
+ GET_BE_U_4(sack->highestConseqTSN) + GET_BE_U_2(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++)
- ND_PRINT((ndo, "\n\t\t[dup TSN #%u: %u] ", tsnNo+1,
- EXTRACT_32BITS(dupTSN)));
-
+ for (tsnNo=0;
+ chunkLengthRemaining != 0 && tsnNo<GET_BE_U_2(sack->numDupTsns);
+ bp += 4, sctpPacketLengthRemaining -= 4, chunkLengthRemaining -= 4, tsnNo++) {
+ if (chunkLengthRemaining < 4) {
+ ND_PRINT("bogus chunk length %u]", chunkLength);
+ return;
+ }
+ dupTSN = (const u_char *)bp;
+ ND_PRINT("\n\t\t[dup TSN #%u: %u] ", tsnNo+1,
+ GET_BE_U_4(dupTSN));
+ }
+ break;
+ }
+ default :
+ {
+ bp += chunkLengthRemaining;
+ sctpPacketLengthRemaining -= chunkLengthRemaining;
+ chunkLengthRemaining = 0;
break;
}
}
- if (ndo->ndo_vflag < 2)
- sep = ", (";
+ /*
+ * Any extra stuff at the end of the chunk?
+ * XXX - report this?
+ */
+ bp += chunkLengthRemaining;
+ sctpPacketLengthRemaining -= chunkLengthRemaining;
+
+ if (ndo->ndo_vflag < 2)
+ sep = ", (";
+
+ if (align != 0) {
+ /*
+ * Fail if the alignment padding isn't in the captured data.
+ * Otherwise, skip it.
+ */
+ ND_TCHECK_LEN(bp, align);
+ bp += align;
+ sctpPacketLengthRemaining -= align;
+ }
}
return;
trunc:
- ND_PRINT((ndo, "[|sctp]"));
+ nd_print_trunc(ndo);
}
projects / tcpdump / blobdiff