guint8 flag,pf,stype,sflag,flag_sel,num_sel,i;
guint16 ns,nr;
guint32 rem_length;
guint8 save_fragmented;
const guint32 mte_seqid=0;
const void *data = NULL;
gboolean more_frags=TRUE;
proto_item *frag_tree_item;
flag = (tvb_get_guint8(next_tvb, offset_payload) & 0x80) >>7 ; // Bit 8 to check i pdu /s pdu or sseg pdu
if (flag == 0x00){ // flag "0" is for i-pdu
poll = (tvb_get_guint8(next_tvb, offset_payload) & 0x40) >>6 ; // Bit 7 pf
ns = (tvb_get_ntohs(next_tvb, offset_payload) & 0x3ff0) >>4 ; // 10 Bits are ns
offset_payload +=1;
nr= (tvb_get_ntohs(next_tvb, offset_payload) & 0x0ffc) >>2 ; // 10 bits are nr
offset_payload +=1;
stype = (tvb_get_guint8(next_tvb, offset_payload) & 0x03) ; // 2 bits LSB are Stype
offset_payload -=2;
FT_connPDU_item = proto_tree_add_text(tree, next_tvb, offset_payload, sdu_length, "BCnPDU (Formatted) : Information, I flag = 0x%02x, Pf = 0x%02x, Ns = 0x%02x, Nr = 0x%02x ", iflag,pf,ns,nr );
FT_connPDU_tree = proto_item_add_subtree(FT_connPDU_item, ett_FT_BCnPDU);
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 1, " sdu_length: %d", sdu_length);
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 1, "flag : 0x%02x (%s)", iflag,val_to_str(iflag,true_false_vals,"%s"));
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 1, "Pf : 0x%02x (%d)", pf,pf);
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 2, "Ns : 0x%02x (%d)", ns,ns);
offset_payload +=1;
sdu_length-=1;
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 2, "Nr : 0x%02x (%d)", nr,nr);
offset_payload +=1;
sdu_length-=1;
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 1, "BConnSegType : 0x%02x (%s)", stype,val_to_str(stype,BCn_Seg_Type_vals,"%s"));
offset_payload +=1;
sdu_length-=1;
switch (stype){
case 0x00: // Continuation of Message
sdu_length+=1;
rem_length = (guint32) sdu_length;
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, rem_length , "PDU data : %d", rem_length);
offset_payload +=rem_length;
sdu_length-=rem_length;
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 1 , "sdu_length: %d", sdu_length);
save_fragmented = pinfo->fragmented;
pinfo->fragmented = TRUE;
mte_frag_msg = fragment_add_seq_next(&mte_reassembly_table,next_tvb, offset_payload, pinfo, mte_seqid, NULL, rem_length, more_frags);
pinfo->fragmented = save_fragmented;
col_set_str(pinfo->cinfo, COL_INFO, " mte segment of a reassembled PDU");
if (sdu_length>0){
SIG_PDU(next_tvb, pinfo, tree);
}
break;
case 0x01: // Beginning of Message
BCnPDU_stype_item = proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, 1, "%s",val_to_str(stype,BCn_Seg_Type_vals,"%s"));
BCnPDU_stype_tree = proto_item_add_subtree(BCnPDU_stype_item, ett_BCnPDU_stype);
BCnPDU_bom_item = proto_tree_add_text(BCnPDU_stype_tree, next_tvb, offset_payload, 1, "MACSAPFLAGS");
BCnPDU_bom_tree = proto_item_add_subtree(BCnPDU_bom_item, ett_BCnPDU_bom);
temp_val = (tvb_get_guint8(next_tvb, offset_payload) & 0x80) >>7 ; // Bit 8 - Flow Control
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 1, "Flow Control : 0x%02x (%s)", temp_val,val_to_str(temp_val, true_false_vals,"%s"));
temp_val = (tvb_get_guint8(next_tvb, offset_payload) & 0x40) >>6 ; // Bit 7 - Reserved l
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 1, "Reserved l : 0x%02x (%d)", temp_val,temp_val);
temp_val = (tvb_get_guint8(next_tvb, offset_payload) & 0x20) >>5 ; // Bit 6 - Expedited
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 1, "Expedited : 0x%02x (%s)", temp_val,val_to_str(temp_val, true_false_vals,"%s"));
temp_val = (tvb_get_guint8(next_tvb, offset_payload) & 0x10) >>4 ; // Bit 5 - OAM PDU Flag
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 1, "OAM PDU Flag : 0x%02x (%s)", temp_val,val_to_str(temp_val, true_false_vals,"%s"));
temp_val = (tvb_get_guint8(next_tvb, offset_payload) & 0x08) >>3 ; // Bit 4 - Reserved 2
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 1, "Reserved 2 : 0x%02x (%d)", temp_val,temp_val);
pl_val = (tvb_get_ntohs(next_tvb, offset_payload) & 0x07ff); // PDU Length - 11 Bits
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 2, "PDU Length : 0x%02x (%d)", pl_val,pl_val);
pl_val = (guint32)pl_val;
fragment_set_tot_len(&mte_reassembly_table, pinfo,mte_seqid, NULL, pl_val);
offset_payload+=2;
sdu_length+=2;
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, 1, " sdu_length: %d", sdu_length);
rem_length= (guint32) tvb_length_remaining(next_tvb, offset_payload);
rem_length-=2;
if (rem_length >= pl_val){
rem_length-=2;
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, rem_length, "PDU data : %d ", rem_length);
offset_payload+=sdu_length;
} else {
proto_tree_add_text(BCnPDU_bom_tree, next_tvb, offset_payload, rem_length, "PDU data : %d ", rem_length);
offset_payload+=rem_length;
}
save_fragmented = pinfo->fragmented;
pinfo->fragmented = TRUE;
mte_frag_msg = fragment_add_seq_next(&mte_reassembly_table, next_tvb, offset_payload, pinfo, mte_seqid, NULL, rem_length, more_frags);
pinfo->fragmented = save_fragmented;
col_set_str(pinfo->cinfo, COL_INFO, " mte segment of a reassembled PDU ");
pinfo->fragmented = save_fragmented;
break;
case 0x02: // End of Message
sdu_length+=2;
more_frags=FALSE;
rem_length = (guint32) sdu_length;
rem_length-=2;
proto_tree_add_text(FT_connPDU_tree, next_tvb, offset_payload, rem_length , "PDU data : %d", rem_length); offset_payload +=rem_length;
disable_CRC=1; save_fragmented = pinfo->fragmented;
pinfo->fragmented = TRUE;
mte_frag_msg = fragment_add_seq_next(&mte_reassembly_table,next_tvb, offset_payload, pinfo, mte_seqid, NULL, rem_length, more_frags); mte_frag_msg = fragment_get_reassembled_id(&mte_reassembly_table, pinfo, mte_seqid);
//mte_tvb = tvb_new_chain(next_tvb, mte_frag_msg->tvb_data);
mte_tvb = process_reassembled_data(next_tvb, offset_payload, pinfo, "mte Reassembled PDU", mte_frag_msg, &mte_frag_items, NULL, tree );
if (mte_tvb) { /* Reassembled */
try_tvb=mte_tvb;
col_append_str(pinfo->cinfo, COL_INFO,"(Message reassembled) ");
add_new_data_source(pinfo, try_tvb, "Reassembled mte");
show_fragment_tree(mte_frag_msg, &mte_frag_items,tree, pinfo, try_tvb, &frag_tree_item);
} else { /* Not last packet of reassembled message */
col_append_str(pinfo->cinfo, COL_INFO,"(Message fragment) ");
}
pinfo->fragmented = save_fragmented;
if (mte_tvb){
SIG_PDU(mte_tvb, pinfo, tree);
} else {
SIG_PDU(next_tvb, pinfo, tree); offset_payload+=sdu_length;
break;</code></pre></div><div id="question-tags" class="tags-container tags"><span class="post-tag tag-link-reassembly" rel="tag" title="see questions tagged 'reassembly'">reassembly</span> <span class="post-tag tag-link-length" rel="tag" title="see questions tagged 'length'">length</span> <span class="post-tag tag-link-table" rel="tag" title="see questions tagged 'table'">table</span></div><div id="question-controls" class="post-controls"></div><div class="post-update-info-container"><div class="post-update-info post-update-info-user"><p>asked <strong>02 Dec '14, 22:26</strong></p><img src="https://secure.gravatar.com/avatar/1339589a92af9455063c09e56bfc6299?s=32&d=identicon&r=g" class="gravatar" width="32" height="32" alt="umar's gravatar image" /><p><span>umar</span><br />
26●22●24●27
accept rate: 0%
Some one please help!!
Some one please help!!