forked from osmocom/wireshark
Separate out/update comment block.
Update IANA assignments. Use available checksum routines. Some cleanup and use of convenience macros. svn path=/trunk/; revision=34922
This commit is contained in:
Jaap Keuter
parent
b310bbf4d0
commit
62067368a0
|
|
@ -1,30 +1,6 @@
|
|||
/* packet-sctp.c
|
||||
* Routines for Stream Control Transmission Protocol dissection
|
||||
*
|
||||
* It should be compliant to
|
||||
* - RFC 2960
|
||||
* - RFC 3309
|
||||
* - RFC 3758
|
||||
* - RFC 4460
|
||||
* - http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-addip-sctp-18.txt
|
||||
* - http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-sctp-auth-08.txt
|
||||
* - http://www.ietf.org/internet-drafts/draft-stewart-sctp-pktdrprep-02.txt
|
||||
* - http://www.ietf.org/internet-drafts/draft-stewart-sctpstrrst-01.txt
|
||||
* - http://www.ietf.org/internet-drafts/draft-ladha-sctp-nonce-02.txt
|
||||
* - http://www.ietf.org/internet-drafts/draft-tuexen-tsvwg-sctp-sack-immediately-00.txt
|
||||
*
|
||||
* Copyright 2000-2005 Michael Tuexen <tuexen [AT] fh-muenster.de>
|
||||
* Still to do (so stay tuned)
|
||||
* - error checking mode
|
||||
* * padding errors
|
||||
* * length errors
|
||||
* * bundling errors
|
||||
* * value errors
|
||||
*
|
||||
*
|
||||
* Reassembly added 2006 by Robin Seggelmann
|
||||
* TSN Tracking by Luis E. G. Ontanon (Feb 2007)
|
||||
* Copyright 2009, Varun Notibala <nbvarun [AT] gmail.com>
|
||||
*
|
||||
* $Id$
|
||||
*
|
||||
|
|
@ -46,6 +22,30 @@
|
|||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
/*
|
||||
* It should be compliant to
|
||||
* - RFC 2960
|
||||
* - RFC 3309
|
||||
* - RFC 3758
|
||||
* - RFC 4460
|
||||
* - http://tools.ietf.org/html/draft-ietf-tsvwg-addip-sctp-18
|
||||
* - http://tools.ietf.org/html/draft-ietf-tsvwg-sctp-auth-08
|
||||
* - http://tools.ietf.org/html/draft-stewart-sctp-pktdrprep-02
|
||||
* - http://tools.ietf.org/html/draft-stewart-sctpstrrst-01
|
||||
* - http://tools.ietf.org/html/draft-ladha-sctp-nonce-02
|
||||
* - http://tools.ietf.org/html/draft-tuexen-tsvwg-sctp-sack-immediately-00
|
||||
*
|
||||
* Still to do (so stay tuned)
|
||||
* - error checking mode
|
||||
* * padding errors
|
||||
* * length errors
|
||||
* * bundling errors
|
||||
* * value errors
|
||||
*
|
||||
* Reassembly added 2006 by Robin Seggelmann
|
||||
* TSN Tracking by Luis E. G. Ontanon (Feb 2007)
|
||||
* Copyright 2009, Varun Notibala <nbvarun [AT] gmail.com>
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
# include "config.h"
|
||||
|
|
@ -63,6 +63,7 @@
|
|||
#include <epan/expert.h>
|
||||
#include <packet-frame.h>
|
||||
#include <epan/crc32.h>
|
||||
#include <epan/adler32.h>
|
||||
|
||||
#define LT(x, y) ((gint32)((x) - (y)) < 0)
|
||||
|
||||
|
|
@ -290,6 +291,7 @@ static gboolean enable_ulp_dissection = TRUE;
|
|||
#define SCTP_ASCONF_ACK_CHUNK_ID 0x80
|
||||
#define SCTP_PKTDROP_CHUNK_ID 0x81
|
||||
#define SCTP_STREAM_RESET_CHUNK_ID 0x82
|
||||
#define SCTP_PAD_CHUNK_ID 0x84
|
||||
#define SCTP_FORWARD_TSN_CHUNK_ID 0xC0
|
||||
#define SCTP_ASCONF_CHUNK_ID 0xC1
|
||||
#define SCTP_IETF_EXT 0xFF
|
||||
|
|
@ -310,19 +312,20 @@ static const value_string chunk_type_values[] = {
|
|||
{ SCTP_ECNE_CHUNK_ID, "ECNE" },
|
||||
{ SCTP_CWR_CHUNK_ID, "CWR" },
|
||||
{ SCTP_SHUTDOWN_COMPLETE_CHUNK_ID, "SHUTDOWN_COMPLETE" },
|
||||
{ SCTP_STREAM_RESET_CHUNK_ID, "STREAM_RESET" },
|
||||
{ SCTP_AUTH_CHUNK_ID, "AUTH" },
|
||||
{ SCTP_NR_SACK_CHUNK_ID, "NR-SACK" },
|
||||
{ SCTP_FORWARD_TSN_CHUNK_ID, "FORWARD_TSN" },
|
||||
{ SCTP_ASCONF_ACK_CHUNK_ID, "ASCONF_ACK" },
|
||||
{ SCTP_PKTDROP_CHUNK_ID, "PKTDROP" },
|
||||
{ SCTP_STREAM_RESET_CHUNK_ID, "STREAM_RESET" },
|
||||
{ SCTP_PAD_CHUNK_ID, "PAD" },
|
||||
{ SCTP_FORWARD_TSN_CHUNK_ID, "FORWARD_TSN" },
|
||||
{ SCTP_ASCONF_CHUNK_ID, "ASCONF" },
|
||||
{ SCTP_IETF_EXT, "IETF_EXTENSION" },
|
||||
{ 0, NULL } };
|
||||
|
||||
/*
|
||||
* Based on http://www.iana.org/assignments/sctp-parameters
|
||||
* as of August 23rd, 2009
|
||||
* as of November 10th, 2010
|
||||
*/
|
||||
static const value_string sctp_payload_proto_id_values[] = {
|
||||
{ NOT_SPECIFIED_PROTOCOL_ID, "not specified" },
|
||||
|
|
@ -356,6 +359,7 @@ static const value_string sctp_payload_proto_id_values[] = {
|
|||
{ IRCP_PAYLOAD_PROTOCOL_ID, "IRCP" },
|
||||
{ LCS_AP_PAYLOAD_PROTOCOL_ID, "LCS-AP" },
|
||||
{ MPICH2_PAYLOAD_PROTOCOL_ID, "MPICH2" },
|
||||
{ SABP_PAYLOAD_PROTOCOL_ID, "SABP" },
|
||||
{ 0, NULL } };
|
||||
|
||||
|
||||
|
|
@ -410,76 +414,31 @@ static gboolean use_reassembly = FALSE;
|
|||
|
||||
static struct _sctp_info sctp_info;
|
||||
|
||||
/* adler32.c -- compute the Adler-32 checksum of a data stream
|
||||
* Copyright (C) 1995-1996 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* available, e.g. from http://www.cdrom.com/pub/infozip/zlib/
|
||||
*
|
||||
* It was modified for the use in this dissector.
|
||||
*/
|
||||
|
||||
#define BASE 65521L /* largest prime smaller than 65536 */
|
||||
#define NMAX 5540 /* NMAX is the largest n - 12 such that */
|
||||
/* 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
|
||||
|
||||
#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
|
||||
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
|
||||
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
|
||||
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
|
||||
#define DO16(buf) DO8(buf,0); DO8(buf,8);
|
||||
|
||||
static unsigned int
|
||||
sctp_adler32(const unsigned char* buf, unsigned int len)
|
||||
{
|
||||
unsigned int s1 = 1L;
|
||||
unsigned int s2 = 0L;
|
||||
int k;
|
||||
|
||||
/* handle the first 8 bytes of the datagram */
|
||||
DO8(buf,0);
|
||||
buf += SOURCE_PORT_LENGTH +
|
||||
DESTINATION_PORT_LENGTH +
|
||||
VERIFICATION_TAG_LENGTH;
|
||||
guint32 result = 1L;
|
||||
|
||||
result = update_adler32(result, buf, SOURCE_PORT_LENGTH + DESTINATION_PORT_LENGTH + VERIFICATION_TAG_LENGTH);
|
||||
/* handle four 0 bytes as checksum */
|
||||
s2 += CHECKSUM_LENGTH * s1;
|
||||
buf += CHECKSUM_LENGTH;
|
||||
result = update_adler32(result, "\0\0\0\0", 4);
|
||||
result = update_adler32(result, buf+COMMON_HEADER_LENGTH, len-COMMON_HEADER_LENGTH);
|
||||
|
||||
/* now we have 12 bytes handled */
|
||||
len -= COMMON_HEADER_LENGTH;
|
||||
|
||||
/* handle the rest of the datagram */
|
||||
while (len > 0) {
|
||||
k = len < NMAX ? len : NMAX;
|
||||
len -= k;
|
||||
while (k >= 16) {
|
||||
DO16(buf);
|
||||
buf += 16;
|
||||
k -= 16;
|
||||
}
|
||||
if (k != 0) do {
|
||||
s1 += *buf++;
|
||||
s2 += s1;
|
||||
} while (--k);
|
||||
s1 %= BASE;
|
||||
s2 %= BASE;
|
||||
}
|
||||
return (s2 << 16) | s1;
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
static guint32
|
||||
sctp_crc32c(const unsigned char* buf, unsigned int len)
|
||||
{
|
||||
unsigned int i;
|
||||
guint32 crc32 = CRC32C_PRELOAD;
|
||||
guint32 result;
|
||||
unsigned char byte0,byte1,byte2,byte3;
|
||||
|
||||
for (i = 0; i < SOURCE_PORT_LENGTH + DESTINATION_PORT_LENGTH + VERIFICATION_TAG_LENGTH; i++)
|
||||
{
|
||||
CRC32C(crc32, buf[i]);
|
||||
}
|
||||
/* handle four 0 bytes as checksum */
|
||||
CRC32C(crc32, 0);
|
||||
CRC32C(crc32, 0);
|
||||
CRC32C(crc32, 0);
|
||||
|
|
@ -488,14 +447,9 @@ sctp_crc32c(const unsigned char* buf, unsigned int len)
|
|||
{
|
||||
CRC32C(crc32, buf[i]);
|
||||
}
|
||||
result = ~crc32;
|
||||
result = CRC32C_SWAP(crc32);
|
||||
|
||||
byte0 = result & 0xff;
|
||||
byte1 = (result>>8) & 0xff;
|
||||
byte2 = (result>>16) & 0xff;
|
||||
byte3 = (result>>24) & 0xff;
|
||||
crc32 = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
|
||||
return ( crc32 );
|
||||
return ( ~result );
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -614,8 +568,8 @@ get_half_assoc(packet_info *pinfo, guint32 spt, guint32 dpt, guint32 vtag)
|
|||
ha->spt = spt;
|
||||
ha->dpt = dpt;
|
||||
ha->vtag = vtag;
|
||||
ha->tsns = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK,"");
|
||||
ha->tsn_acks = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK,"");
|
||||
ha->tsns = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "sctp_tsns");
|
||||
ha->tsn_acks = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "sctp_tsn_acks");
|
||||
ha->started = FALSE;
|
||||
ha->first_tsn= 0;
|
||||
ha->cumm_ack= 0;
|
||||
|
|
@ -752,7 +706,7 @@ sctp_tsn(packet_info *pinfo, tvbuff_t *tvb, proto_item *tsn_item,
|
|||
return;
|
||||
|
||||
|
||||
framenum = pinfo->fd->num;
|
||||
framenum = PINFO_FD_NUM(pinfo);
|
||||
|
||||
/* If we're dissecting for a read filter in the GUI [tshark assigns
|
||||
* frame numbers before running the read filter], don't do the TSN
|
||||
|
|
@ -784,8 +738,7 @@ sctp_tsn(packet_info *pinfo, tvbuff_t *tvb, proto_item *tsn_item,
|
|||
t->tsn = tsn;
|
||||
|
||||
t->first_transmit.framenum = framenum;
|
||||
t->first_transmit.ts.secs = pinfo->fd->abs_ts.secs;
|
||||
t->first_transmit.ts.nsecs = pinfo->fd->abs_ts.nsecs;
|
||||
t->first_transmit.ts = pinfo->fd->abs_ts;
|
||||
|
||||
emem_tree_insert32(h->tsns,reltsn,t);
|
||||
}
|
||||
|
|
@ -812,8 +765,7 @@ sctp_tsn(packet_info *pinfo, tvbuff_t *tvb, proto_item *tsn_item,
|
|||
*/
|
||||
*r = se_alloc0(sizeof(struct _retransmit_t));
|
||||
(*r)->framenum = framenum;
|
||||
(*r)->ts.secs = pinfo->fd->abs_ts.secs;
|
||||
(*r)->ts.nsecs = pinfo->fd->abs_ts.nsecs;
|
||||
(*r)->ts = pinfo->fd->abs_ts;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -856,7 +808,7 @@ sctp_ack(packet_info *pinfo, tvbuff_t *tvb, proto_tree *acks_tree,
|
|||
if (!h || !h->peer)
|
||||
return;
|
||||
|
||||
framenum = pinfo->fd->num;
|
||||
framenum = PINFO_FD_NUM(pinfo);
|
||||
|
||||
/* printf("%.6d ACK: %p->%p [%u] \n",framenum,h,h->peer,reltsn); */
|
||||
|
||||
|
|
@ -867,8 +819,7 @@ sctp_ack(packet_info *pinfo, tvbuff_t *tvb, proto_tree *acks_tree,
|
|||
sctp_tsn_t *t2;
|
||||
|
||||
t->ack.framenum = framenum;
|
||||
t->ack.ts.secs = pinfo->fd->abs_ts.secs;
|
||||
t->ack.ts.nsecs = pinfo->fd->abs_ts.nsecs;
|
||||
t->ack.ts = pinfo->fd->abs_ts;
|
||||
|
||||
if (( t2 = emem_tree_lookup32(h->peer->tsn_acks, framenum) )) {
|
||||
for(;t2->next;t2 = t2->next)
|
||||
|
|
@ -903,7 +854,7 @@ sctp_ack_block(packet_info *pinfo, sctp_half_assoc_t *h, tvbuff_t *tvb,
|
|||
if ( !h || !h->peer || ! h->peer->started )
|
||||
return;
|
||||
|
||||
framenum = pinfo->fd->num;
|
||||
framenum = PINFO_FD_NUM(pinfo);
|
||||
rel_end = RELTSNACK(tsn_end);
|
||||
|
||||
if (tsn_start_ptr) {
|
||||
|
|
@ -932,7 +883,7 @@ sctp_ack_block(packet_info *pinfo, sctp_half_assoc_t *h, tvbuff_t *tvb,
|
|||
return;
|
||||
}
|
||||
|
||||
if (pinfo->fd->flags.visited || rel_end < rel_start || rel_end - rel_start > 0xffff0000 ) return;
|
||||
if (PINFO_FD_VISITED(pinfo) || rel_end < rel_start || rel_end - rel_start > 0xffff0000 ) return;
|
||||
|
||||
if (! tsn_start_ptr )
|
||||
h->peer->cumm_ack = rel_end + 1;
|
||||
|
|
|
|||
|
|
@ -28,7 +28,7 @@
|
|||
/*
|
||||
* SCTP payload protocol IDs.
|
||||
* Based on http://www.iana.org/assignments/sctp-parameters
|
||||
* as of October 28th, 2009
|
||||
* as of November 10th, 2010
|
||||
*/
|
||||
#define NOT_SPECIFIED_PROTOCOL_ID 0
|
||||
#define IUA_PAYLOAD_PROTOCOL_ID 1
|
||||
|
|
@ -61,5 +61,7 @@
|
|||
#define IRCP_PAYLOAD_PROTOCOL_ID 28
|
||||
#define LCS_AP_PAYLOAD_PROTOCOL_ID 29
|
||||
#define MPICH2_PAYLOAD_PROTOCOL_ID 30
|
||||
#define SABP_PAYLOAD_PROTOCOL_ID 31
|
||||
|
||||
#define M2TP_PAYLOAD_PROTOCOL_ID 99 /* s-link */
|
||||
#endif /* sctpppids.h */
|
||||
|
|
|
|||
Loading…
Reference in New Issue