Add decoding of part of access network identifier option

fixes Bug 10492.

Change-Id: Ib01f457b74825e6c2a7aa1dc1d0f43ff4b104dea
Reviewed-on: https://code.wireshark.org/review/4267
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
This commit is contained in:
AndersBroman 2014-09-23 17:02:13 +02:00 committed by Anders Broman
parent 717ff08f32
commit 3a85a5eb96
1 changed files with 226 additions and 2 deletions

View File

@ -926,6 +926,10 @@ static const value_string mip6_mng_id_type_vals[] = {
#define MIP6_MNG_LEN 6
#define MIP6_MAG_IPv6_LEN 16
#define MIP6_ACC_NET_ID_MIN_LEN 3
static dissector_table_t ip_dissector_table;
/* Initialize the protocol and registered header fields */
@ -1134,6 +1138,14 @@ static int hf_mip6_opt_mng_sub_type = -1;
static int hf_mip6_opt_mng_reserved = -1;
static int hf_mip6_opt_mng_mng_id = -1;
static int hf_mip6_opt_acc_net_id_sub_opt = -1;
static int hf_mip6_opt_acc_net_id_sub_opt_len = -1;
static int hf_mip6_opt_acc_net_id_sub_opt_e_bit = -1;
static int hf_mip6_opt_acc_net_id_sub_opt_net_name_len = -1;
static int hf_mip6_opt_acc_net_id_sub_opt_net_name = -1;
static int hf_mip6_opt_acc_net_id_sub_opt_ap_name_len = -1;
static int hf_mip6_opt_acc_net_id_sub_opt_ap_name = -1;
static int hf_pmip6_opt_lila_lla = -1;
/* Initialize the subtree pointers */
@ -1186,6 +1198,8 @@ static gint ett_mip6_opt_redir = -1;
static gint ett_mip6_opt_load_inf = -1;
static gint ett_mip6_opt_alt_ip4 = -1;
static gint ett_mip6_opt_mng = -1;
static gint ett_mip6_opt_mag_ipv6 = -1;
static gint ett_mip6_opt_acc_net_id = -1;
static expert_field ei_mip6_ie_not_dissected = EI_INIT;
@ -2996,6 +3010,156 @@ dissect_pmip6_opt_mng(const mip6_opt *optp _U_, tvbuff_t *tvb, int offset,
}
/*
11.1. MAG IPv6 Address
The MAG IPv6 address mobility option contains the IPv6 address of a
MAG involved in localized routing. The MAG IPv6 address option has
an alignment requirement of 8n+4.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length | Reserved | Address Length|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ +
| |
+ MAG IPv6 Address +
| |
+ +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
static void
dissect_pmip6_opt_mag_ipv6(const mip6_opt *optp _U_, tvbuff_t *tvb, int offset,
guint optlen _U_, packet_info *pinfo _U_, proto_tree *opt_tree, proto_item *hdr_item _U_ )
{
/* offset points to tag(opt) */
offset++;
proto_tree_add_item(opt_tree, hf_mip6_opt_len, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_text(opt_tree, tvb, offset, 18, "Not dissected yet");
}
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
... ANI Sub-option(s) ... ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
3.1. Format of the Access Network Identifier Sub-Option
The Access Network Identifier sub-options are used for carrying
information elements related to the access network to which the
mobile node is attached. These sub-options can be included in the
Access Network Identifier option defined in Section 3. The format of
this sub-option is as follows:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ANI Type | ANI Length | Option Data ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
ANI Type: 8-bit unsigned integer indicating the type of the Access
Network Identifier sub-option. This specification defines the
following types:
0 - Reserved
1 - Network-Identifier sub-option
2 - Geo-Location sub-option
3 - Operator-Identifier sub-option
*/
static const value_string mmip6_opt_acc_net_id_sub_opt_vals[] = {
{ 0, "Reserved"},
{ 1, "Network-Identifier"},
{ 2, "Geo-Location"},
{ 3, "Operator-Identifier"},
{ 0, NULL}
};
static const true_false_string mip6_opt_acc_net_id_sub_opt_e_bit_value = {
"UTF-8",
"Encoding is undefined"
};
static void
dissect_pmip6_opt_acc_net_id(const mip6_opt *optp _U_, tvbuff_t *tvb, int offset,
guint optlen _U_, packet_info *pinfo _U_, proto_tree *opt_tree, proto_item *hdr_item _U_ )
{
gint16 length, sub_opt_len;
guint8 sub_opt, e_bit, net_name_len, ap_name_len;
/* offset points to tag(opt) */
offset++;
length = tvb_get_guint8(tvb,offset);
proto_tree_add_item(opt_tree, hf_mip6_opt_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
while(length > 0){
sub_opt = tvb_get_guint8(tvb,offset);
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
length--;
sub_opt_len = tvb_get_guint8(tvb,offset);
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
length--;
switch(sub_opt){
case 1: /* Network-Identifier */
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ANI Type=1 | ANI Length |E| Reserved | Net-Name Len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Network Name (e.g., SSID or PLMNID) ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AP-Name Len | Access-Point Name ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
e_bit = tvb_get_guint8(tvb,offset);
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt_e_bit, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
net_name_len = tvb_get_guint8(tvb,offset);
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt_net_name_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
if(e_bit == 0x80){
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt_net_name, tvb, offset, net_name_len, ENC_BIG_ENDIAN|ENC_UTF_8);
}else{
proto_tree_add_text(opt_tree, tvb, offset, net_name_len, "Network Name");
};
offset = offset+net_name_len;
ap_name_len = tvb_get_guint8(tvb,offset);
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt_ap_name_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(opt_tree, hf_mip6_opt_acc_net_id_sub_opt_ap_name, tvb, offset, ap_name_len, ENC_BIG_ENDIAN|ENC_UTF_8);
offset = offset+ap_name_len;
default:
proto_tree_add_text(opt_tree, tvb, offset, sub_opt_len, "Data not dissected yet");
offset = offset + sub_opt_len;
length = length - sub_opt_len;
break;
}
}
}
static const mip6_opt mip6_opts[] = {
{
MIP6_PAD1, /* 0 Pad1 [RFC3775] */
@ -3398,8 +3562,24 @@ static const mip6_opt mip6_opts[] = {
MIP6_MNG_LEN,
dissect_pmip6_opt_mng
},
/* 51 MAG IPv6 Address [RFC6705] */
/* 52 Access Network Identifier [RFC6757] */
{
MIP6_MAG_IPv6, /* 51 MAG IPv6 Address [RFC6705] */
"MAG IPv6 Address",
&ett_mip6_opt_mag_ipv6,
OPT_LEN_FIXED_LENGTH,
MIP6_MAG_IPv6_LEN,
dissect_pmip6_opt_mag_ipv6
},
{
MIP6_ACC_NET_ID, /* 52 Access Network Identifier [RFC6757] */
"Access Network Identifier",
&ett_mip6_opt_acc_net_id,
OPT_LEN_VARIABLE_LENGTH,
MIP6_ACC_NET_ID_MIN_LEN,
dissect_pmip6_opt_acc_net_id
},
};
@ -4569,6 +4749,48 @@ proto_register_mip6(void)
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt,
{ "ANI Type", "mip6.acc_net_id.ani",
FT_UINT8, BASE_DEC, VALS(mmip6_opt_acc_net_id_sub_opt_vals), 0x0,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt_len,
{ "Length", "mip6.acc_net_id.sub_opt_len",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt_e_bit,
{ "E(Encoding)", "mip6.acc_net_id.e_bit",
FT_BOOLEAN, 8, TFS(&mip6_opt_acc_net_id_sub_opt_e_bit_value), 0x80,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt_net_name_len,
{ "Net-Name Length", "mip6.acc_net_id.net_name_len",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt_net_name,
{ "Network Name", "mip6.acc_net_id.net_name",
FT_STRING, FT_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt_ap_name_len,
{ "AP-Name Length", "mip6.acc_net_id.ap_name_len",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_mip6_opt_acc_net_id_sub_opt_ap_name,
{ "Access-Point Name", "mip6.acc_net_id.ap_name",
FT_STRING, FT_NONE, NULL, 0x0,
NULL, HFILL }
},
};
/* Setup protocol subtree array */
@ -4622,6 +4844,8 @@ proto_register_mip6(void)
&ett_mip6_opt_load_inf,
&ett_mip6_opt_alt_ip4,
&ett_mip6_opt_mng,
&ett_mip6_opt_mag_ipv6,
&ett_mip6_opt_acc_net_id,
};
static ei_register_info ei[] = {