nexmon – Rev 1
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/*
* exported_pdu.c
* exported_pdu helper functions
* Copyright 2013, Anders Broman <anders-broman@ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include <epan/exported_pdu.h>
#include <epan/address_types.h>
#include <epan/tap.h>
static GSList *export_pdu_tap_name_list = NULL;
static int exp_pdu_data_ip_size(const address* addr)
{
if (addr->type == AT_IPv4){
return 4 + EXP_PDU_TAG_IPV4_LEN;
} else if(addr->type == AT_IPv6){
return 4 + EXP_PDU_TAG_IPV6_LEN;
}
return 0;
}
static int exp_pdu_data_src_ip_size(packet_info *pinfo, void* data _U_)
{
return exp_pdu_data_ip_size(&pinfo->net_src);
}
static int exp_pdu_data_src_ip_populate_data(packet_info *pinfo, void* data _U_, guint8 *tlv_buffer, guint32 buffer_size _U_)
{
if(pinfo->net_src.type == AT_IPv4){
tlv_buffer[0] = 0;
tlv_buffer[1] = EXP_PDU_TAG_IPV4_SRC;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_IPV4_LEN; /* tag length */
memcpy(tlv_buffer+4, pinfo->net_src.data, EXP_PDU_TAG_IPV4_LEN);
return 4 + EXP_PDU_TAG_IPV4_LEN;
}else if(pinfo->net_src.type == AT_IPv6){
tlv_buffer[0] = 0;
tlv_buffer[1] = EXP_PDU_TAG_IPV6_SRC;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_IPV6_LEN; /* tag length */
memcpy(tlv_buffer+4, pinfo->net_src.data, EXP_PDU_TAG_IPV6_LEN);
return 4 + EXP_PDU_TAG_IPV6_LEN;
}
return 0;
}
static int exp_pdu_data_dst_ip_size(packet_info *pinfo, void* data _U_)
{
return exp_pdu_data_ip_size(&pinfo->net_dst);
}
static int exp_pdu_data_dst_ip_populate_data(packet_info *pinfo, void* data _U_, guint8 *tlv_buffer, guint32 buffer_size _U_)
{
if(pinfo->net_dst.type == AT_IPv4){
tlv_buffer[0] = 0;
tlv_buffer[1] = EXP_PDU_TAG_IPV4_DST;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_IPV4_LEN; /* tag length */
memcpy(tlv_buffer+4, pinfo->net_dst.data, EXP_PDU_TAG_IPV4_LEN);
return 4 + EXP_PDU_TAG_IPV4_LEN;
}else if(pinfo->net_dst.type == AT_IPv6){
tlv_buffer[0] = 0;
tlv_buffer[1] = EXP_PDU_TAG_IPV6_DST;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_IPV6_LEN; /* tag length */
memcpy(tlv_buffer+4, pinfo->net_dst.data, EXP_PDU_TAG_IPV6_LEN);
return 4 + EXP_PDU_TAG_IPV6_LEN;
}
return 0;
}
static int exp_pdu_data_port_type_size(packet_info *pinfo _U_, void* data _U_)
{
return EXP_PDU_TAG_PORT_LEN + 4;
}
static int exp_pdu_data_port_type_populate_data(packet_info *pinfo, void* data, guint8 *tlv_buffer, guint32 buffer_size _U_)
{
tlv_buffer[0] = 0;
tlv_buffer[1] = EXP_PDU_TAG_PORT_TYPE;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_PORT_TYPE_LEN; /* tag length */
tlv_buffer[4] = (pinfo->ptype & 0xff000000) >> 24;
tlv_buffer[5] = (pinfo->ptype & 0x00ff0000) >> 16;
tlv_buffer[6] = (pinfo->ptype & 0x0000ff00) >> 8;
tlv_buffer[7] = (pinfo->ptype & 0x000000ff);
return exp_pdu_data_port_type_size(pinfo, data);
}
static int exp_pdu_data_port_size(packet_info *pinfo _U_, void* data _U_)
{
return EXP_PDU_TAG_PORT_LEN + 4;
}
static int exp_pdu_data_port_populate_data(guint32 port, guint8 porttype, guint8 *tlv_buffer, guint32 buffer_size _U_)
{
tlv_buffer[0] = 0;
tlv_buffer[1] = porttype;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_PORT_LEN; /* tag length */
tlv_buffer[4] = (port & 0xff000000) >> 24;
tlv_buffer[5] = (port & 0x00ff0000) >> 16;
tlv_buffer[6] = (port & 0x0000ff00) >> 8;
tlv_buffer[7] = (port & 0x000000ff);
return EXP_PDU_TAG_PORT_LEN + 4;
}
static int exp_pdu_data_src_port_populate_data(packet_info *pinfo, void* data _U_, guint8 *tlv_buffer, guint32 buffer_size)
{
return exp_pdu_data_port_populate_data(pinfo->srcport, EXP_PDU_TAG_SRC_PORT, tlv_buffer, buffer_size);
}
static int exp_pdu_data_dst_port_populate_data(packet_info *pinfo, void* data _U_, guint8 *tlv_buffer, guint32 buffer_size)
{
return exp_pdu_data_port_populate_data(pinfo->destport, EXP_PDU_TAG_DST_PORT, tlv_buffer, buffer_size);
}
static int exp_pdu_data_orig_frame_num_size(packet_info *pinfo _U_, void* data _U_)
{
return EXP_PDU_TAG_ORIG_FNO_LEN + 4;
}
static int exp_pdu_data_orig_frame_num_populate_data(packet_info *pinfo, void* data, guint8 *tlv_buffer, guint32 buffer_size _U_)
{
tlv_buffer[0] = 0;
tlv_buffer[1] = EXP_PDU_TAG_ORIG_FNO;
tlv_buffer[2] = 0;
tlv_buffer[3] = EXP_PDU_TAG_ORIG_FNO_LEN; /* tag length */
tlv_buffer[4] = (pinfo->num & 0xff000000) >> 24;
tlv_buffer[5] = (pinfo->num & 0x00ff0000) >> 16;
tlv_buffer[6] = (pinfo->num & 0x0000ff00) >> 8;
tlv_buffer[7] = (pinfo->num & 0x000000ff);
return exp_pdu_data_orig_frame_num_size(pinfo, data);
}
exp_pdu_data_item_t exp_pdu_data_src_ip = {exp_pdu_data_src_ip_size, exp_pdu_data_src_ip_populate_data, NULL};
exp_pdu_data_item_t exp_pdu_data_dst_ip = {exp_pdu_data_dst_ip_size, exp_pdu_data_dst_ip_populate_data, NULL};
exp_pdu_data_item_t exp_pdu_data_port_type = {exp_pdu_data_port_type_size, exp_pdu_data_port_type_populate_data, NULL};
exp_pdu_data_item_t exp_pdu_data_src_port = {exp_pdu_data_port_size, exp_pdu_data_src_port_populate_data, NULL};
exp_pdu_data_item_t exp_pdu_data_dst_port = {exp_pdu_data_port_size, exp_pdu_data_dst_port_populate_data, NULL};
exp_pdu_data_item_t exp_pdu_data_orig_frame_num = {exp_pdu_data_orig_frame_num_size, exp_pdu_data_orig_frame_num_populate_data, NULL};
exp_pdu_data_t *export_pdu_create_common_tags(packet_info *pinfo, const char *proto_name, guint16 tag_type)
{
const exp_pdu_data_item_t *common_exp_pdu_items[] = {
&exp_pdu_data_src_ip,
&exp_pdu_data_dst_ip,
&exp_pdu_data_port_type,
&exp_pdu_data_src_port,
&exp_pdu_data_dst_port,
&exp_pdu_data_orig_frame_num,
NULL
};
return export_pdu_create_tags(pinfo, proto_name, tag_type, common_exp_pdu_items);
}
/**
* Allocates and fills the exp_pdu_data_t struct according to the list of items
*
* The tags in the tag buffer SHOULD be added in numerical order.
*/
exp_pdu_data_t *
export_pdu_create_tags(packet_info *pinfo, const char* proto_name, guint16 tag_type, const exp_pdu_data_item_t **items_list)
{
exp_pdu_data_t *exp_pdu_data;
const exp_pdu_data_item_t **loop_items = items_list;
int tag_buf_size = 0;
int proto_str_len, proto_tag_len, buf_remaining, item_size;
guint8* buffer_data;
DISSECTOR_ASSERT(proto_name != NULL);
DISSECTOR_ASSERT((tag_type == EXP_PDU_TAG_PROTO_NAME) || (tag_type == EXP_PDU_TAG_HEUR_PROTO_NAME) || (tag_type == EXP_PDU_TAG_DISSECTOR_TABLE_NAME));
exp_pdu_data = (exp_pdu_data_t *)g_malloc(sizeof(exp_pdu_data_t));
/* Start by computing size of protocol name as a tag */
proto_str_len = (int)strlen(proto_name);
/* Ensure that tag length is a multiple of 4 bytes */
proto_tag_len = ((proto_str_len + 3) & 0xfffffffc);
/* Add Tag + length */
tag_buf_size += (proto_tag_len + 4);
/* Compute size of items */
while (*loop_items) {
tag_buf_size += (*loop_items)->size_func(pinfo, (*loop_items)->data);
loop_items++;
}
/* Add end of options length */
tag_buf_size+=4;
exp_pdu_data->tlv_buffer = (guint8 *)g_malloc0(tag_buf_size);
exp_pdu_data->tlv_buffer_len = tag_buf_size;
buffer_data = exp_pdu_data->tlv_buffer;
buf_remaining = exp_pdu_data->tlv_buffer_len;
/* Start by adding protocol name as a tag */
buffer_data[0] = (tag_type & 0xff00) >> 8;
buffer_data[1] = tag_type & 0x00ff;
buffer_data[2] = (proto_tag_len & 0xff00) >> 8;
buffer_data[3] = proto_tag_len & 0x00ff; /* tag length */
memcpy(buffer_data+4, proto_name, proto_str_len);
buffer_data += (proto_tag_len+4);
buf_remaining -= (proto_tag_len+4);
/* Populate data */
loop_items = items_list;
while (*loop_items) {
item_size = (*loop_items)->populate_data(pinfo, (*loop_items)->data, buffer_data, buf_remaining);
buffer_data += item_size;
buf_remaining -= item_size;
loop_items++;
}
return exp_pdu_data;
}
gint
register_export_pdu_tap(const char *name)
{
gchar *tap_name = g_strdup(name);
export_pdu_tap_name_list = g_slist_prepend(export_pdu_tap_name_list, tap_name);
return register_tap(tap_name);
}
static
gint sort_pdu_tap_name_list(gconstpointer a, gconstpointer b)
{
return g_strcmp0((const char *)a, (const char*)b);
}
GSList *
get_export_pdu_tap_list(void)
{
export_pdu_tap_name_list = g_slist_sort(export_pdu_tap_name_list, sort_pdu_tap_name_list);
return export_pdu_tap_name_list;
}
void export_pdu_init(void)
{
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/