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Add dissection of Authentication request. 

svn path=/trunk/; revision=26940
This commit is contained in:
Anders Broman 2008-12-08 22:21:49 +00:00
parent fa3a12e5b0
commit 7a9c76f1f9
1 changed files with 50 additions and 2 deletions
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52
epan/dissectors/packet-nas_eps.c
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@ -209,13 +209,23 @@ nas_emm_elem_idx_t;
/* 9.9.3 EPS Mobility Management (EMM) information elements
* 9.9.3.1 Authentication failure parameter
* See subclause 10.5.3.2.2 in 3GPP TS 24.008 [6].
*/
/*
* 9.9.3.2 Authentication parameter AUTN
* See subclause 10.5.3.1.1 in 3GPP TS 24.008 [6].
*/
/*
* 9.9.3.3 Authentication parameter RAND
* See subclause 10.5.3.1 in 3GPP TS 24.008 [6].
*/
/*
* 9.9.3.4 Authentication response parameter
*/
/*
* 9.9.3.5 Daylight saving time
* See subclause 10.5.3.12 in 3GPP TS 24.008 [6].
*/
/*
* 9.9.3.6 Detach type
* 9.9.3.6a DRX parameter
* 9.9.3.7 EMM cause
@ -372,7 +382,7 @@ static const value_string nas_eps_emm_NAS_key_set_identifier_vals[] = {
guint8 (*emm_elem_fcn[])(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len, gchar *add_string, int string_len) = {
/* 9.9.3 EPS Mobility Management (EMM) information elements */
NULL, /* 9.9.3.1 Authentication failure parameter */
NULL, /* 9.9.3.2 Authentication parameter AUTN */
NULL, /* 9.9.3.2 Authentication parameter AUTN(packet-gsm_a_dtap.c) */
NULL, /* 9.9.3.3 Authentication parameter RAND */
NULL, /* 9.9.3.4 Authentication response parameter */
NULL, /* 9.9.3.5 Daylight saving time */
@ -508,11 +518,49 @@ nas_emm_attach_req(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
*/
/*
* 8.2.7 Authentication request
*/
/*
* NAS key set identifierASME NAS key set identifier 9.9.3.19 M V 1/2
* Spare half octet Spare half octet 9.9.2.5 M V 1/2
* Authentication parameter RAND (EPS challenge) Authentication parameter RAND 9.9.3.3 M V 16
* Authentication parameter AUTN (EPS challenge) Authentication parameter AUTN 9.9.3.2 M LV 17
*/
static void
nas_emm_auth_req(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
{
guint32 curr_offset, bit_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/*
* NAS key set identifierASME NAS key set identifier 9.9.3.19 M V 1/2
*/
bit_offset = curr_offset<<3;
proto_tree_add_bits_item(tree, hf_nas_eps_spare_bits, tvb, bit_offset, 1, FALSE);
bit_offset++;
proto_tree_add_bits_item(tree, hf_nas_eps_emm_nas_key_set_id, tvb, bit_offset, 3, FALSE);
bit_offset+=3;
/* Spare half octet Spare half octet 9.9.2.5 M V 1/2 */
proto_tree_add_bits_item(tree, hf_nas_eps_emm_spare_half_octet, tvb, bit_offset, 4, FALSE);
bit_offset+=4;
/* Fix up the lengths */
curr_len--;
curr_offset++;
/*
* Authentication parameter RAND (EPS challenge) 9.9.3.3 M V 16
*/
ELEM_MAND_V(GSM_A_PDU_TYPE_DTAP, DE_AUTH_PARAM_RAND);
/*
* Authentication parameter AUTN (EPS challenge) 9.9.3.2 M LV 17
*/
ELEM_MAND_LV(GSM_A_PDU_TYPE_COMMON, DE_AUTH_PARAM_AUTN, " EPS challenge");
}
/*
* 8.2.8 Authentication response
* Authentication response parameter Authentication response parameter 9.9.3.4 M LV 5-17
@ -700,7 +748,7 @@ static void (*nas_msg_emm_fcn[])(tvbuff_t *tvb, proto_tree *tree, guint32 offset
NULL, /* GUTI reallocation command */
NULL, /* GUTI reallocation complete */
NULL, /* Authentication request */
nas_emm_auth_req, /* Authentication request */
NULL, /* Authentication response */
NULL, /* Authentication reject */
NULL, /* Authentication failure */