epan/exported_pdu.c

   1 /*
   2  * exported_pdu.c
   3  * exported_pdu helper functions
   4  * Copyright 2013, Anders Broman <anders-broman@ericsson.com>
   5  *
   6  * $Id$
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with this program; if not, write to the Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28 #include <glib.h>
  29
  30 #include <epan/packet.h>
  31 #include <epan/exported_pdu.h>
  32 #include <epan/dissectors/packet-mtp3.h>
  33 #include <epan/dissectors/packet-dvbci.h>
  34
  35 /**
  36  * Allocates and fills the exp_pdu_data_t struct according to the wanted_exp_tags
  37  * bit_fileld, if proto_name is != NULL, wtap_encap must be -1 or vice-versa
  38  */
  39 exp_pdu_data_t *
  40 load_export_pdu_tags(packet_info *pinfo, const char* proto_name, int wtap_encap _U_, guint32 tags_bit_field)
  41 {
  42         exp_pdu_data_t *exp_pdu_data;
  43         int tag_buf_size = 0;
  44         int str_len = 0;
  45         int tag_str_len = 0;
  46         int i = 0, j;
  47         gboolean port_type_defined = FALSE;
  48
  49         exp_pdu_data = (exp_pdu_data_t *)g_malloc(sizeof(exp_pdu_data_t));
  50
  51         /* If we have a protocol name, calculate the buffer size needed including padding and tag + length */
  52         if(proto_name){
  53                 str_len = (int)strlen(proto_name);
  54
  55                 /* Ensure that tag length is a multiple of 4 bytes */
  56                 tag_str_len = (str_len + 3) & 0xfffffffc;
  57                 /* Add Tag + length */
  58                 tag_buf_size = tag_str_len + 4;
  59         }
  60
  61         if((tags_bit_field & EXP_PDU_TAG_IP_SRC_BIT) == EXP_PDU_TAG_IP_SRC_BIT){
  62                 if(pinfo->net_src.type == AT_IPv4){
  63                         tag_buf_size += 4 + EXP_PDU_TAG_IPV4_SRC_LEN;
  64                 }else if(pinfo->net_src.type == AT_IPv6){
  65                         tag_buf_size += 4 + EXP_PDU_TAG_IPV6_SRC_LEN;
  66                 }
  67         }
  68
  69         if((tags_bit_field & EXP_PDU_TAG_IP_DST_BIT) == EXP_PDU_TAG_IP_DST_BIT){
  70                 if(pinfo->net_dst.type == AT_IPv4){
  71                         tag_buf_size += 4 + EXP_PDU_TAG_IPV4_DST_LEN;
  72                 }else if(pinfo->net_dst.type == AT_IPv6){
  73                         tag_buf_size += 4 + EXP_PDU_TAG_IPV6_DST_LEN;
  74                 }
  75         }
  76
  77         if((tags_bit_field & EXP_PDU_TAG_SRC_PORT_BIT) == EXP_PDU_TAG_SRC_PORT_BIT){
  78                 if (!port_type_defined) {
  79                         tag_buf_size= tag_buf_size + EXP_PDU_TAG_PORT_TYPE_LEN + 4;
  80                         port_type_defined = TRUE;
  81                 }
  82                 tag_buf_size= tag_buf_size + EXP_PDU_TAG_SRC_PORT_LEN + 4;
  83         }
  84
  85         if((tags_bit_field & EXP_PDU_TAG_DST_PORT_BIT) == EXP_PDU_TAG_DST_PORT_BIT){
  86                 if (!port_type_defined) {
  87                         tag_buf_size= tag_buf_size + EXP_PDU_TAG_PORT_TYPE_LEN + 4;
  88                 }
  89                 tag_buf_size= tag_buf_size + EXP_PDU_TAG_DST_PORT_LEN + 4;
  90         }
  91
  92         if((tags_bit_field & EXP_PDU_TAG_SCTP_PPID_BIT) == EXP_PDU_TAG_SCTP_PPID_BIT){
  93                 for(j = 0; j < MAX_NUMBER_OF_PPIDS; j++) {
  94                         if (pinfo->ppids[j] != LAST_PPID) {
  95                                 tag_buf_size= tag_buf_size + EXP_PDU_TAG_SCTP_PPID_LEN + 4;
  96                         } else {
  97                                 break;
  98                         }
  99                 }
 100         }
 101
 102         if((tags_bit_field & EXP_PDU_TAG_SS7_OPC_BIT) == EXP_PDU_TAG_SS7_OPC_BIT){
 103                 if(pinfo->src.type == AT_SS7PC){
 104                         tag_buf_size += 4 + EXP_PDU_TAG_SS7_OPC_LEN;
 105                 }
 106         }
 107
 108         if((tags_bit_field & EXP_PDU_TAG_SS7_DPC_BIT) == EXP_PDU_TAG_SS7_DPC_BIT){
 109                 if(pinfo->dst.type == AT_SS7PC){
 110                         tag_buf_size += 4 + EXP_PDU_TAG_SS7_DPC_LEN;
 111                 }
 112         }
 113
 114         if((tags_bit_field & EXP_PDU_TAG_ORIG_FNO_BIT) == EXP_PDU_TAG_ORIG_FNO_BIT){
 115                 tag_buf_size= tag_buf_size + EXP_PDU_TAG_ORIG_FNO_LEN + 4;
 116         }
 117
 118         if((tags_bit_field & EXP_PDU_TAG_DVBCI_EVT_BIT) == EXP_PDU_TAG_DVBCI_EVT_BIT){
 119                 tag_buf_size= tag_buf_size + EXP_PDU_TAG_DVBCI_EVT_LEN + 4;
 120         }
 121
 122         /* Add end of options length */
 123         tag_buf_size+=4;
 124
 125         exp_pdu_data->tlv_buffer = (guint8 *)g_malloc0(tag_buf_size);
 126         exp_pdu_data->tlv_buffer_len = tag_buf_size;
 127         port_type_defined = FALSE;
 128
 129         if(proto_name){
 130                 exp_pdu_data->tlv_buffer[i] = 0;
 131                 i++;
 132                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_PROTO_NAME;
 133                 i++;
 134                 exp_pdu_data->tlv_buffer[i] = 0;
 135                 i++;
 136                 exp_pdu_data->tlv_buffer[i] = tag_str_len; /* tag length */
 137                 i++;
 138                 memcpy(exp_pdu_data->tlv_buffer+i, proto_name, str_len);
 139                 i = i + tag_str_len;
 140
 141         }
 142
 143         if((tags_bit_field & EXP_PDU_TAG_IP_SRC_BIT) == EXP_PDU_TAG_IP_SRC_BIT){
 144                 if(pinfo->net_src.type == AT_IPv4){
 145                         exp_pdu_data->tlv_buffer[i] = 0;
 146                         i++;
 147                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_SRC;
 148                         i++;
 149                         exp_pdu_data->tlv_buffer[i] = 0;
 150                         i++;
 151                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_SRC_LEN; /* tag length */
 152                         i++;
 153                         memcpy(exp_pdu_data->tlv_buffer+i, pinfo->net_src.data, EXP_PDU_TAG_IPV4_SRC_LEN);
 154                         i += EXP_PDU_TAG_IPV4_SRC_LEN;
 155                 }else if(pinfo->net_src.type == AT_IPv6){
 156                         exp_pdu_data->tlv_buffer[i] = 0;
 157                         i++;
 158                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_SRC;
 159                         i++;
 160                         exp_pdu_data->tlv_buffer[i] = 0;
 161                         i++;
 162                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_SRC_LEN; /* tag length */
 163                         i++;
 164                         memcpy(exp_pdu_data->tlv_buffer+i, pinfo->net_src.data, EXP_PDU_TAG_IPV6_SRC_LEN);
 165                         i += EXP_PDU_TAG_IPV6_SRC_LEN;
 166                 }
 167         }
 168
 169         if((tags_bit_field & EXP_PDU_TAG_IP_DST_BIT) == EXP_PDU_TAG_IP_DST_BIT){
 170                 if(pinfo->net_dst.type == AT_IPv4){
 171                         exp_pdu_data->tlv_buffer[i] = 0;
 172                         i++;
 173                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_DST;
 174                         i++;
 175                         exp_pdu_data->tlv_buffer[i] = 0;
 176                         i++;
 177                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV4_DST_LEN; /* tag length */
 178                         i++;
 179                         memcpy(exp_pdu_data->tlv_buffer+i, pinfo->net_dst.data, EXP_PDU_TAG_IPV4_DST_LEN);
 180                         i += EXP_PDU_TAG_IPV4_DST_LEN;
 181                 }else if(pinfo->net_dst.type == AT_IPv6){
 182                         exp_pdu_data->tlv_buffer[i] = 0;
 183                         i++;
 184                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_DST;
 185                         i++;
 186                         exp_pdu_data->tlv_buffer[i] = 0;
 187                         i++;
 188                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_IPV6_DST_LEN; /* tag length */
 189                         i++;
 190                         memcpy(exp_pdu_data->tlv_buffer+i, pinfo->net_dst.data, EXP_PDU_TAG_IPV6_DST_LEN);
 191                         i += EXP_PDU_TAG_IPV6_DST_LEN;
 192                 }
 193         }
 194
 195         if((tags_bit_field & EXP_PDU_TAG_SRC_PORT_BIT) == EXP_PDU_TAG_SRC_PORT_BIT){
 196                 if (!port_type_defined) {
 197                         exp_pdu_data->tlv_buffer[i] = 0;
 198                         i++;
 199                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_PORT_TYPE;
 200                         i++;
 201                         exp_pdu_data->tlv_buffer[i] = 0;
 202                         i++;
 203                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_PORT_TYPE_LEN; /* tag length */
 204                         i++;
 205                         exp_pdu_data->tlv_buffer[i]   = (pinfo->ptype & 0xff000000) >> 24;
 206                         exp_pdu_data->tlv_buffer[i+1] = (pinfo->ptype & 0x00ff0000) >> 16;
 207                         exp_pdu_data->tlv_buffer[i+2] = (pinfo->ptype & 0x0000ff00) >> 8;
 208                         exp_pdu_data->tlv_buffer[i+3] = (pinfo->ptype & 0x000000ff);
 209                         i = i +EXP_PDU_TAG_PORT_TYPE_LEN;
 210                         port_type_defined = TRUE;
 211                 }
 212                 exp_pdu_data->tlv_buffer[i] = 0;
 213                 i++;
 214                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SRC_PORT;
 215                 i++;
 216                 exp_pdu_data->tlv_buffer[i] = 0;
 217                 i++;
 218                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SRC_PORT_LEN; /* tag length */
 219                 i++;
 220                 exp_pdu_data->tlv_buffer[i]   = (pinfo->srcport & 0xff000000) >> 24;
 221                 exp_pdu_data->tlv_buffer[i+1] = (pinfo->srcport & 0x00ff0000) >> 16;
 222                 exp_pdu_data->tlv_buffer[i+2] = (pinfo->srcport & 0x0000ff00) >> 8;
 223                 exp_pdu_data->tlv_buffer[i+3] = (pinfo->srcport & 0x000000ff);
 224                 i = i +EXP_PDU_TAG_SRC_PORT_LEN;
 225         }
 226
 227         if((tags_bit_field & EXP_PDU_TAG_DST_PORT_BIT) == EXP_PDU_TAG_DST_PORT_BIT){
 228                 if (!port_type_defined) {
 229                         exp_pdu_data->tlv_buffer[i] = 0;
 230                         i++;
 231                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_PORT_TYPE;
 232                         i++;
 233                         exp_pdu_data->tlv_buffer[i] = 0;
 234                         i++;
 235                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_PORT_TYPE_LEN; /* tag length */
 236                         i++;
 237                         exp_pdu_data->tlv_buffer[i]   = (pinfo->ptype & 0xff000000) >> 24;
 238                         exp_pdu_data->tlv_buffer[i+1] = (pinfo->ptype & 0x00ff0000) >> 16;
 239                         exp_pdu_data->tlv_buffer[i+2] = (pinfo->ptype & 0x0000ff00) >> 8;
 240                         exp_pdu_data->tlv_buffer[i+3] = (pinfo->ptype & 0x000000ff);
 241                         i = i +EXP_PDU_TAG_PORT_TYPE_LEN;
 242                 }
 243                 exp_pdu_data->tlv_buffer[i] = 0;
 244                 i++;
 245                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_DST_PORT;
 246                 i++;
 247                 exp_pdu_data->tlv_buffer[i] = 0;
 248                 i++;
 249                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_DST_PORT_LEN; /* tag length */
 250                 i++;
 251                 exp_pdu_data->tlv_buffer[i]   = (pinfo->destport & 0xff000000) >> 24;
 252                 exp_pdu_data->tlv_buffer[i+1] = (pinfo->destport & 0x00ff0000) >> 16;
 253                 exp_pdu_data->tlv_buffer[i+2] = (pinfo->destport & 0x0000ff00) >> 8;
 254                 exp_pdu_data->tlv_buffer[i+3] = (pinfo->destport & 0x000000ff);
 255                 i = i +EXP_PDU_TAG_DST_PORT_LEN;
 256         }
 257
 258         if((tags_bit_field & EXP_PDU_TAG_SCTP_PPID_BIT) == EXP_PDU_TAG_SCTP_PPID_BIT){
 259                 for(j = 0; j < MAX_NUMBER_OF_PPIDS; j++) {
 260                         if (pinfo->ppids[j] != LAST_PPID) {
 261                                 exp_pdu_data->tlv_buffer[i] = 0;
 262                                 i++;
 263                                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SCTP_PPID;
 264                                 i++;
 265                                 exp_pdu_data->tlv_buffer[i] = 0;
 266                                 i++;
 267                                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SCTP_PPID_LEN; /* tag length */
 268                                 i++;
 269                                 exp_pdu_data->tlv_buffer[i]   = (pinfo->ppids[j] & 0xff000000) >> 24;
 270                                 exp_pdu_data->tlv_buffer[i+1] = (pinfo->ppids[j] & 0x00ff0000) >> 16;
 271                                 exp_pdu_data->tlv_buffer[i+2] = (pinfo->ppids[j] & 0x0000ff00) >> 8;
 272                                 exp_pdu_data->tlv_buffer[i+3] = (pinfo->ppids[j] & 0x000000ff);
 273                                 i = i +EXP_PDU_TAG_SCTP_PPID_LEN;
 274                         } else {
 275                                 break;
 276                         }
 277                 }
 278         }
 279
 280         if((tags_bit_field & EXP_PDU_TAG_SS7_OPC_BIT) == EXP_PDU_TAG_SS7_OPC_BIT){
 281                 if(pinfo->src.type == AT_SS7PC){
 282                         mtp3_addr_pc_t *mtp3_addr = (mtp3_addr_pc_t *)(pinfo->src.data);
 283                         exp_pdu_data->tlv_buffer[i] = 0;
 284                         i++;
 285                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SS7_OPC;
 286                         i++;
 287                         exp_pdu_data->tlv_buffer[i] = 0;
 288                         i++;
 289                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SS7_OPC_LEN; /* tag length */
 290                         i++;
 291                         exp_pdu_data->tlv_buffer[i]   = (mtp3_addr->pc & 0xff000000) >> 24;
 292                         exp_pdu_data->tlv_buffer[i+1] = (mtp3_addr->pc & 0x00ff0000) >> 16;
 293                         exp_pdu_data->tlv_buffer[i+2] = (mtp3_addr->pc & 0x0000ff00) >> 8;
 294                         exp_pdu_data->tlv_buffer[i+3] = (mtp3_addr->pc & 0x000000ff);
 295                         exp_pdu_data->tlv_buffer[i+4] = (mtp3_addr->type & 0xff00) >> 8;
 296                         exp_pdu_data->tlv_buffer[i+5] = (mtp3_addr->type & 0x00ff);
 297                         exp_pdu_data->tlv_buffer[i+6] =  mtp3_addr->ni;
 298                         i += EXP_PDU_TAG_SS7_OPC_LEN;
 299                 }
 300         }
 301
 302         if((tags_bit_field & EXP_PDU_TAG_SS7_DPC_BIT) == EXP_PDU_TAG_SS7_DPC_BIT){
 303                 if(pinfo->dst.type == AT_SS7PC){
 304                         mtp3_addr_pc_t *mtp3_addr = (mtp3_addr_pc_t *)(pinfo->dst.data);
 305                         exp_pdu_data->tlv_buffer[i] = 0;
 306                         i++;
 307                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SS7_DPC;
 308                         i++;
 309                         exp_pdu_data->tlv_buffer[i] = 0;
 310                         i++;
 311                         exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_SS7_DPC_LEN; /* tag length */
 312                         i++;
 313                         exp_pdu_data->tlv_buffer[i]   = (mtp3_addr->pc & 0xff000000) >> 24;
 314                         exp_pdu_data->tlv_buffer[i+1] = (mtp3_addr->pc & 0x00ff0000) >> 16;
 315                         exp_pdu_data->tlv_buffer[i+2] = (mtp3_addr->pc & 0x0000ff00) >> 8;
 316                         exp_pdu_data->tlv_buffer[i+3] = (mtp3_addr->pc & 0x000000ff);
 317                         exp_pdu_data->tlv_buffer[i+4] = (mtp3_addr->type & 0xff00) >> 8;
 318                         exp_pdu_data->tlv_buffer[i+5] = (mtp3_addr->type & 0x00ff);
 319                         exp_pdu_data->tlv_buffer[i+6] =  mtp3_addr->ni;
 320                         i += EXP_PDU_TAG_SS7_DPC_LEN;
 321                 }
 322         }
 323
 324         if((tags_bit_field & EXP_PDU_TAG_ORIG_FNO_BIT) == EXP_PDU_TAG_ORIG_FNO_BIT){
 325                 exp_pdu_data->tlv_buffer[i] = 0;
 326                 i++;
 327                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_ORIG_FNO;
 328                 i++;
 329                 exp_pdu_data->tlv_buffer[i] = 0;
 330                 i++;
 331                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_ORIG_FNO_LEN; /* tag length */
 332                 i++;
 333                 exp_pdu_data->tlv_buffer[i]   = (pinfo->fd->num & 0xff000000) >> 24;
 334                 exp_pdu_data->tlv_buffer[i+1] = (pinfo->fd->num & 0x00ff0000) >> 16;
 335                 exp_pdu_data->tlv_buffer[i+2] = (pinfo->fd->num & 0x0000ff00) >> 8;
 336                 exp_pdu_data->tlv_buffer[i+3] = (pinfo->fd->num & 0x000000ff);
 337                 /*i = i +EXP_PDU_TAG_ORIG_FNO_LEN;*/
 338         }
 339
 340         if((tags_bit_field & EXP_PDU_TAG_DVBCI_EVT_BIT) == EXP_PDU_TAG_DVBCI_EVT_BIT){
 341                 exp_pdu_data->tlv_buffer[i] = 0;
 342                 i++;
 343                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_DVBCI_EVT;
 344                 i++;
 345                 exp_pdu_data->tlv_buffer[i] = 0;
 346                 i++;
 347                 exp_pdu_data->tlv_buffer[i] = EXP_PDU_TAG_DVBCI_EVT_LEN;
 348                 i++;
 349         exp_pdu_data->tlv_buffer[i] = dvbci_get_evt_from_addrs(pinfo);
 350         }
 351
 352         return exp_pdu_data;
 353 }