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wireshark/epan/dissectors/packet-uasip.c
John Thacker 203cd2cba9 prefs: More cleanup, auto prefs 
Remove callback function from pref registrations for dissectors that
don't need a callback. In other dissectors, move registration that
only needs to be done once inside the check for initialization,
avoiding some console messages when preferences are changed
("Duplicate dissectors (anonymous) and (anonymous) for protocol...")
and the like.

Add a couple auto preferences for dissectors missed in previous waves.

Ping #14319
2022-08-09 06:21:05 +00:00

570 lines
18 KiB
C
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/* packet-uasip.c
* Routines for UA/UDP (Universal Alcatel over UDP) and NOE/SIP packet dissection.
* Copyright 2012, Alcatel-Lucent Enterprise <lars.ruoff@alcatel-lucent.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "epan/packet.h"
#include "epan/prefs.h"
#include "epan/expert.h"
#if 0
#include <epan/tap.h>
#endif
#include <epan/addr_resolv.h>
#include <wsutil/report_message.h>
#include "packet-uaudp.h"
void proto_register_uasip(void);
void proto_reg_handoff_uasip(void);
static tap_struct_uaudp ua_tap_info;
#if 0
static int uasip_tap = -1;
#endif
static int proto_uasip = -1;
static int hf_uasip_opcode = -1;
static int hf_uasip_version = -1;
static int hf_uasip_window_size = -1;
static int hf_uasip_mtu = -1;
static int hf_uasip_udp_lost = -1;
static int hf_uasip_udp_lost_reinit = -1;
static int hf_uasip_keepalive = -1;
static int hf_uasip_qos_ip_tos = -1;
static int hf_uasip_qos_8021_vlid = -1;
static int hf_uasip_qos_8021_pri = -1;
static int hf_uasip_expseq = -1;
static int hf_uasip_sntseq = -1;
static int hf_uasip_type = -1;
static int hf_uasip_length = -1;
static gint ett_uasip = -1;
static gint ett_uasip_tlv = -1;
static expert_field ei_uasip_tlv_length = EI_INIT;
static guint8 proxy_ipaddr[4];
static const char *pref_proxy_ipaddr_s = NULL;
static gboolean use_proxy_ipaddr = FALSE;
static gboolean noesip_enabled = FALSE;
static dissector_handle_t uasip_handle;
static dissector_handle_t ua_sys_to_term_handle;
static dissector_handle_t ua_term_to_sys_handle;
static void _dissect_uasip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, e_ua_direction direction)
{
proto_item *uasip_item, *tlv_item, *tlv_len_item;
proto_tree *uasip_tree, *connect_tree;
guint8 opcode;
guint32 type, length;
gint offset = 0;
if (noesip_enabled)
{
col_append_str(pinfo->cinfo, COL_PROTOCOL, "/NOE");
}
else
{
col_append_str(pinfo->cinfo, COL_PROTOCOL, "/DL");
}
opcode = tvb_get_guint8(tvb, offset);
offset++;
ua_tap_info.opcode = opcode;
ua_tap_info.expseq = 0;
ua_tap_info.sntseq = 0;
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str_ext(opcode, &uaudp_opcode_str_ext, "unknown (0x%02x)"));
uasip_item = proto_tree_add_protocol_format(tree, proto_uasip, tvb, 0, 5,
"SIP/NOE Protocol, %s",
val_to_str_ext(opcode, &uaudp_opcode_str_ext, "unknown (0x%02x)"));
uasip_tree = proto_item_add_subtree(uasip_item, ett_uasip);
proto_tree_add_uint(uasip_tree, hf_uasip_opcode, tvb, 0, 1, opcode);
switch(opcode)
{
case UAUDP_CONNECT:
{
while(tvb_reported_length_remaining(tvb, offset) > 0)
{
type = tvb_get_guint8(tvb, offset+0);
connect_tree = proto_tree_add_subtree(uasip_tree, tvb, offset, 0, ett_uasip_tlv, &tlv_item,
val_to_str_ext(type, &uaudp_connect_vals_ext, "Unknown %d"));
proto_tree_add_uint(connect_tree, hf_uasip_type, tvb, offset, 1, type);
offset++;
tlv_len_item = proto_tree_add_item_ret_uint(connect_tree, hf_uasip_length, tvb, offset, 1, ENC_NA, &length);
proto_item_set_len(tlv_item, length+2);
offset++;
switch(type)
{
case UAUDP_CONNECT_VERSION:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_version, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_WINDOW_SIZE:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_window_size, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_MTU:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_mtu, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_UDP_LOST:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_udp_lost, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_UDP_LOST_REINIT:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_udp_lost_reinit, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_KEEPALIVE:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_keepalive, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_QOS_IP_TOS:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_qos_ip_tos, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_QOS_8021_VLID:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_qos_8021_vlid, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
case UAUDP_CONNECT_QOS_8021_PRI:
if ((length >= 1) && (length <= 4))
{
proto_tree_add_item(connect_tree, hf_uasip_qos_8021_pri, tvb, offset, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_uasip_tlv_length, "Invalid length %d", length);
}
break;
default:
break;
}
offset += length;
}
}
break;
case UAUDP_NACK:
{
proto_tree_add_item_ret_uint(uasip_tree, hf_uasip_expseq, tvb, offset, 2, ENC_BIG_ENDIAN, &ua_tap_info.expseq);
/*offset += 2;*/
if (noesip_enabled)
{
col_add_fstr(pinfo->cinfo, COL_INFO, "NACK");
}
else
{
col_add_fstr(pinfo->cinfo, COL_INFO, "NACK exp:%d", ua_tap_info.expseq);
}
}
break;
case UAUDP_DATA:
{
int datalen;
proto_tree_add_item_ret_uint(uasip_tree, hf_uasip_expseq, tvb, offset+0, 2, ENC_BIG_ENDIAN, &ua_tap_info.expseq);
proto_tree_add_item_ret_uint(uasip_tree, hf_uasip_sntseq, tvb, offset+2, 2, ENC_BIG_ENDIAN, &ua_tap_info.sntseq);
offset += 4;
datalen = tvb_reported_length_remaining(tvb, offset);
if (noesip_enabled)
{
if (datalen > 0)
{
if (direction == SYS_TO_TERM)
{
call_dissector(ua_sys_to_term_handle, tvb_new_subset_length(tvb, offset, datalen), pinfo, tree);
}
else if (direction == TERM_TO_SYS)
{
call_dissector(ua_term_to_sys_handle, tvb_new_subset_length(tvb, offset, datalen), pinfo, tree);
}
else
{
col_add_str(pinfo->cinfo, COL_INFO, "DATA - Couldn't resolve direction.");
}
}
else
{
col_add_str(pinfo->cinfo, COL_INFO, "ACK");
}
}
else
{
if (datalen > 0)
{
col_add_fstr(pinfo->cinfo, COL_INFO, "DATA exp:%d", ua_tap_info.expseq);
col_append_fstr(pinfo->cinfo, COL_INFO, " snt:%d", ua_tap_info.sntseq);
}
else
{
col_add_fstr(pinfo->cinfo, COL_INFO, "ACK exp:%d", ua_tap_info.expseq);
col_append_fstr(pinfo->cinfo, COL_INFO, " snt:%d", ua_tap_info.sntseq);
}
}
}
break;
default:
break;
}
#if 0
tap_queue_packet(uasip_tap, pinfo, &ua_tap_info);
#endif
}
static int dissect_uasip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
if (use_proxy_ipaddr)
{
if (memcmp((pinfo->src).data, proxy_ipaddr, sizeof(proxy_ipaddr)) == 0)
{
_dissect_uasip(tvb, pinfo, tree, SYS_TO_TERM);
return tvb_captured_length(tvb);
}
else if (memcmp((pinfo->dst).data, proxy_ipaddr, sizeof(proxy_ipaddr)) == 0)
{
_dissect_uasip(tvb, pinfo, tree, TERM_TO_SYS);
return tvb_captured_length(tvb);
}
}
_dissect_uasip(tvb, pinfo, tree, DIR_UNKNOWN);
return tvb_captured_length(tvb);
}
void proto_register_uasip(void)
{
module_t *uasip_module;
static hf_register_info hf_uasip[] = {
{
&hf_uasip_opcode,
{
"Opcode",
"uasip.opcode",
FT_UINT8,
BASE_DEC | BASE_EXT_STRING,
&uaudp_opcode_str_ext,
0x0,
"UA/SIP Opcode",
HFILL
}
},
{
&hf_uasip_version,
{
"Version",
"uasip.version",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP Version",
HFILL
}
},
{
&hf_uasip_window_size,
{
"Window Size",
"uasip.window_size",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP Window Size",
HFILL
}
},
{
&hf_uasip_mtu,
{
"MTU",
"uasip.mtu",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP MTU",
HFILL
}
},
{
&hf_uasip_udp_lost,
{
"UDP Lost",
"uasip.udp_lost",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP Lost",
HFILL
}
},
{
&hf_uasip_udp_lost_reinit,
{
"UDP lost reinit",
"uasip.udp_lost_reinit",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP Lost Re-Init",
HFILL
}
},
{
&hf_uasip_keepalive,
{
"Keepalive",
"uasip.keepalive",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP Keepalive",
HFILL
}
},
{
&hf_uasip_qos_ip_tos,
{
"QoS IP TOS",
"uasip.qos_ip_tos",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP QoS IP TOS",
HFILL
}
},
{
&hf_uasip_qos_8021_vlid,
{
"QoS 802.1 VLID",
"uasip.qos_8021_vlid",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP QoS 802.1 VLID",
HFILL
}
},
{
&hf_uasip_qos_8021_pri,
{
"QoS 802.1 PRI",
"uasip.qos_8021_pri",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
"UA/SIP QoS 802.1 PRI",
HFILL
}
},
{
&hf_uasip_expseq,
{
"Sequence Number (expected)",
"uasip.expseq",
FT_UINT16,
BASE_DEC,
NULL,
0x0,
"UA/SIP Expected Sequence Number",
HFILL
}
},
{
&hf_uasip_sntseq,
{
"Sequence Number (sent)",
"uasip.sntseq",
FT_UINT16,
BASE_DEC,
NULL,
0x0,
"UA/SIP Sent Sequence Number",
HFILL
}
},
{
&hf_uasip_type,
{
"Type",
"uasip.type",
FT_UINT8,
BASE_DEC|BASE_EXT_STRING,
&uaudp_connect_vals_ext,
0x0,
NULL,
HFILL
}
},
{
&hf_uasip_length,
{
"Length",
"uasip.length",
FT_UINT8,
BASE_DEC,
NULL,
0x0,
NULL,
HFILL
}
},
};
static gint *ett[] =
{
&ett_uasip,
&ett_uasip_tlv,
};
static ei_register_info ei[] = {
{ &ei_uasip_tlv_length, { "uasip.tlv_length_invalid", PI_PROTOCOL, PI_WARN, "Invalid length", EXPFILL }},
};
expert_module_t* expert_uasip;
proto_uasip = proto_register_protocol("UA/SIP Protocol", "UASIP", "uasip");
uasip_handle = register_dissector("uasip", dissect_uasip, proto_uasip);
proto_register_field_array(proto_uasip, hf_uasip, array_length(hf_uasip));
proto_register_subtree_array(ett, array_length(ett));
expert_uasip = expert_register_protocol(proto_uasip);
expert_register_field_array(expert_uasip, ei, array_length(ei));
uasip_module = prefs_register_protocol(proto_uasip, proto_reg_handoff_uasip);
prefs_register_obsolete_preference(uasip_module, "application_octet_stream");
prefs_register_bool_preference(uasip_module, "noesip", "Try to decode SIP NOE", "NOE SIP Protocol", &noesip_enabled);
prefs_register_string_preference(uasip_module, "proxy_ipaddr", "Proxy IP Address",
"IPv4 address of the proxy (Invalid values will be ignored)",
&pref_proxy_ipaddr_s);
#if 0
uasip_tap = register_tap("uasip");
#endif
}
void proto_reg_handoff_uasip(void)
{
static gboolean prefs_initialized = FALSE;
if (!prefs_initialized)
{
ua_sys_to_term_handle = find_dissector_add_dependency("ua_sys_to_term", proto_uasip);
ua_term_to_sys_handle = find_dissector_add_dependency("ua_term_to_sys", proto_uasip);
/* Enable decoding "Internet media type" as UASIP */
dissector_add_for_decode_as("media_type", uasip_handle);
prefs_initialized = TRUE;
}
use_proxy_ipaddr = FALSE;
memset(proxy_ipaddr, 0, sizeof(proxy_ipaddr));
if (strcmp(pref_proxy_ipaddr_s, "") != 0) {
if (str_to_ip(pref_proxy_ipaddr_s, proxy_ipaddr)) {
use_proxy_ipaddr = TRUE;
} else {
report_failure("uasip: Invalid 'Proxy IP Address': \"%s\"", pref_proxy_ipaddr_s);
}
}
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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