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/*
* exported_pdu.c
* exported_pdu helper functions
* Copyright 2013, Anders Broman <anders-broman@ericsson.com>
*
* $Id$
*
* 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>
/**
* Allocates and fills the exp_pdu_data_t struct according to the wanted_exp_tags
* bit_fileld, if proto_name is != NULL, wtap_encap must be -1 or vice-versa
*/
exp_pdu_data_t *
load_export_pdu_tags(packet_info *pinfo, const char* proto_name, int wtap_encap _U_, guint32 tags_bit_field)
{
exp_pdu_data_t *exp_pdu_data;
int tag_buf_size = 0;
int str_len = 0;
int tag_str_len = 0;
int i = 0;
exp_pdu_data = (exp_pdu_data_t *)g_malloc(sizeof(exp_pdu_data_t));
/* If we have a protocol name, calculate the buffer size needed including padding and tag + length */
if(proto_name){
str_len = (int)strlen(proto_name);
/* Ensure that tag length is a multiple of 4 bytes */
tag_str_len = (str_len + 3) & 0xfffffffc;
/* Add Tag + length */
tag_buf_size = tag_str_len + 4;
}
if((tags_bit_field & EXP_PDU_TAG_IP_SRC_BIT) == EXP_PDU_TAG_IP_SRC_BIT){
/* tag+length */
tag_buf_size+=4;
if(pinfo->net_src.type == AT_IPv4){
tag_buf_size = tag_buf_size + EXP_PDU_TAG_IPV4_SRC_LEN;
}else{
tag_buf_size = tag_buf_size + EXP_PDU_TAG_IPV6_SRC_LEN;
}
}
if((tags_bit_field & EXP_PDU_TAG_IP_DST_BIT) == EXP_PDU_TAG_IP_DST_BIT){
/* tag+length */
tag_buf_size+=4;
if(pinfo->net_dst.type == AT_IPv4){
tag_buf_size = tag_buf_size + EXP_PDU_TAG_IPV4_DST_LEN;
}else{
tag_buf_size = tag_buf_size + EXP_PDU_TAG_IPV6_DST_LEN;
}
}
if((tags_bit_field & EXP_PDU_TAG_SRC_PORT_BIT) == EXP_PDU_TAG_SRC_PORT_BIT){
tag_buf_size= tag_buf_size + EXP_PDU_TAG_SRC_PORT_LEN + 4;
}
if((tags_bit_field & EXP_PDU_TAG_DST_PORT_BIT) == EXP_PDU_TAG_DST_PORT_BIT){
tag_buf_size= tag_buf_size + EXP_PDU_TAG_DST_PORT_LEN + 4;
}
/* 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;
if(proto_name){
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_PROTO_NAME;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = tag_str_len; /* tag length */
i++;
memcpy(exp_pdu_data->tlv_buffer+i, proto_name, str_len);
i = i + tag_str_len;
}
if((tags_bit_field & EXP_PDU_TAG_IP_SRC_BIT) == EXP_PDU_TAG_IP_SRC_BIT){
if(pinfo->net_src.type == AT_IPv4){
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_SRC;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_SRC_LEN; /* tag length */
i++;
}else{
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_SRC;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_SRC_LEN; /* tag length */
i++;
}
memcpy(exp_pdu_data->tlv_buffer+i, pinfo->net_src.data, pinfo->net_src.len);
i += (pinfo->net_src.type == AT_IPv4) ? EXP_PDU_TAG_IPV4_SRC_LEN : EXP_PDU_TAG_IPV6_SRC_LEN;
}
if((tags_bit_field & EXP_PDU_TAG_IP_DST_BIT) == EXP_PDU_TAG_IP_DST_BIT){
if(pinfo->net_dst.type == AT_IPv4){
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_DST;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_DST_LEN; /* tag length */
i++;
}else{
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_DST;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_DST_LEN; /* tag length */
i++;
}
memcpy(exp_pdu_data->tlv_buffer+i, pinfo->net_dst.data, pinfo->net_dst.len);
i += (pinfo->net_dst.type == AT_IPv4) ? EXP_PDU_TAG_IPV4_DST_LEN : EXP_PDU_TAG_IPV6_DST_LEN;
}
if((tags_bit_field & EXP_PDU_TAG_SRC_PORT_BIT) == EXP_PDU_TAG_SRC_PORT_BIT){
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SRC_PORT;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SRC_PORT_LEN; /* tag length */
i++;
exp_pdu_data->tlv_buffer[i] = (pinfo->srcport & 0xff000000) >> 24;
exp_pdu_data->tlv_buffer[i+1] = (pinfo->srcport & 0x00ff0000) >> 16;
exp_pdu_data->tlv_buffer[i+2] = (pinfo->srcport & 0x0000ff00) >> 8;
exp_pdu_data->tlv_buffer[i+3] = (pinfo->srcport & 0x000000ff);
i = i +EXP_PDU_TAG_SRC_PORT_LEN;
}
if((tags_bit_field & EXP_PDU_TAG_DST_PORT_BIT) == EXP_PDU_TAG_DST_PORT_BIT){
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_DST_PORT;
i++;
exp_pdu_data->tlv_buffer[i] = 0;
i++;
exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_DST_PORT_LEN; /* tag length */
i++;
exp_pdu_data->tlv_buffer[i] = (pinfo->destport & 0xff000000) >> 24;
exp_pdu_data->tlv_buffer[i+1] = (pinfo->destport & 0x00ff0000) >> 16;
exp_pdu_data->tlv_buffer[i+2] = (pinfo->destport & 0x0000ff00) >> 8;
exp_pdu_data->tlv_buffer[i+3] = (pinfo->destport & 0x000000ff);
/*i = i +EXP_PDU_TAG_DST_PORT_LEN;*/
}
return exp_pdu_data;
}
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