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A segmented DATA SPDU sequence of length one has user information. 

svn path=/trunk/; revision=28634
This commit is contained in:
Graeme Lunt 2009-06-04 08:30:03 +00:00
parent b66fa033ce
commit 99a105954f
1 changed files with 13 additions and 2 deletions
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15
epan/dissectors/packet-ses.c
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@ -626,14 +626,25 @@ dissect_parameter(tvbuff_t *tvb, int offset, proto_tree *tree,
}
if (flags & END_SPDU) {
/*
* In Data Transfer and Typed Data SPDUs,
* In Data Transfer and Typed Data SPDUs, (X.225: 8.3.{11,13}.4)
* "The User Information Field shall be present
* if the Enclosure Item is not present, or has
* bit 2 = 0", which presumably means it shall
* *not* be present if the Enclosure item *is*
* present and has bit 2 = 1.
*/
has_user_information = FALSE;
if(!(flags & BEGINNING_SPDU)) {
/* X.225 7.11.2 also states:
* "All DATA TRANSFER SPDUs, except the last DATA TRANSFER SPDU in a sequence greater than one, must have user information"
* So if BEGINNING_SPDU and END_SPDU are set in the enclosure item, then this is presumably a sequence of one and
* consequently there must be user information.
*
* So, there is only no user information if *only* END_SPDU is set.
*/
has_user_information = FALSE;
}
}
break;