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GTPv2: improve APN restriction IE 

Change-Id: Id5fd2a0c6b09a1127ab867bf2e5bc44a0cd2acd6
Reviewed-on: https://code.wireshark.org/review/23565
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
This commit is contained in:
Joakim Karlsson 2017-09-15 20:41:38 +02:00 committed by Michael Mann
parent 800c179dfa
commit ec1a412cbd
1 changed files with 24 additions and 4 deletions
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28
epan/dissectors/packet-gtpv2.c
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@ -4916,14 +4916,34 @@ dissect_udp_s_port_nr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, p
/*
* 8.57 APN Restriction
*/
/* Table 8.57-1: Valid Combinations of APN Restriction */
static const value_string gtpv2_apn_restriction_vals[] = {
{0, "No Existing Contexts or Restriction"},
{1, "Public-1"},
{2, "Public-2"},
{3, "Private-1"},
{4, "Private-2"},
{0, NULL}
};
value_string_ext gtpv2_apn_restriction_vals_ext = VALUE_STRING_EXT_INIT(gtpv2_apn_restriction_vals);
static void
dissect_gtpv2_apn_rest(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_, session_args_t * args _U_)
{
guint8 type_value;
int offset = 0;
type_value = tvb_get_guint8(tvb, 0);
proto_tree_add_item(tree, hf_gtpv2_apn_rest, tvb, 0, 1, ENC_BIG_ENDIAN);
proto_item_append_text(item, "value %u", type_value);
/* APN restriction value octet 5 */
type_value = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_gtpv2_apn_rest, tvb, offset, 1, ENC_BIG_ENDIAN);
/* Add APN restriction to ie_tree */
proto_item_append_text(item, "%s (%u)", val_to_str_ext_const(type_value, &gtpv2_apn_restriction_vals_ext, "Unknown"), type_value);
offset += 1;
if (length > offset)
proto_tree_add_item(tree, hf_gtpv2_spare_bytes, tvb, offset, length-offset, ENC_NA);
}
/*
@ -8811,7 +8831,7 @@ void proto_register_gtpv2(void)
},
{&hf_gtpv2_apn_rest,
{"APN Restriction", "gtpv2.apn_rest",
FT_UINT8, BASE_DEC, NULL, 0x0,
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &gtpv2_apn_restriction_vals_ext, 0x0,
NULL, HFILL}
},
{&hf_gtpv2_selec_mode,