static void free_Tvb(Tvb tvb) { if (!tvb) return; if (!tvb->expired) { tvb->expired = TRUE; } else { if (tvb->need_free) tvb_free(tvb->ws_tvb); g_free(tvb); } }
static fragment_head * force_reassemble_seq(reassembly_table *table, packet_info *pinfo, guint32 id) { fragment_head *fd_head; fragment_item *fd_i; fragment_item *last_fd; guint32 dfpos, size, packet_lost, burst_lost, seq_num; guint8 *data; fd_head = fragment_get(table, pinfo, id, NULL); /* have we already seen this frame ?*/ if (pinfo->fd->flags.visited) { if (fd_head != NULL && fd_head->flags & FD_DEFRAGMENTED) { return fd_head; } else { return NULL; } } if (fd_head==NULL){ /* we must have it to continue */ return NULL; } /* check for packet lost and count the burst of packet lost */ packet_lost = 0; burst_lost = 0; seq_num = 0; for(fd_i=fd_head->next;fd_i;fd_i=fd_i->next) { if (seq_num != fd_i->offset) { packet_lost += fd_i->offset - seq_num; if ( (fd_i->offset - seq_num) > burst_lost ) { burst_lost = fd_i->offset - seq_num; } } seq_num = fd_i->offset + 1; } /* we have received an entire packet, defragment it and * free all fragments */ size=0; last_fd=NULL; for(fd_i=fd_head->next;fd_i;fd_i=fd_i->next) { if(!last_fd || last_fd->offset!=fd_i->offset){ size+=fd_i->len; } last_fd=fd_i; } data = (guint8 *) g_malloc(size); fd_head->tvb_data = tvb_new_real_data(data, size, size); fd_head->len = size; /* record size for caller */ /* add all data fragments */ dfpos = 0; last_fd=NULL; for (fd_i=fd_head->next;fd_i && fd_i->len + dfpos <= size;fd_i=fd_i->next) { if (fd_i->len) { if(!last_fd || last_fd->offset!=fd_i->offset){ memcpy(data+dfpos,tvb_get_ptr(fd_i->tvb_data,0,fd_i->len),fd_i->len); dfpos += fd_i->len; } else { /* duplicate/retransmission/overlap */ fd_i->flags |= FD_OVERLAP; fd_head->flags |= FD_OVERLAP; if( (last_fd->len!=fd_i->datalen) || tvb_memeql(last_fd->tvb_data, 0, tvb_get_ptr(fd_i->tvb_data, 0, last_fd->len), last_fd->len) ){ fd_i->flags |= FD_OVERLAPCONFLICT; fd_head->flags |= FD_OVERLAPCONFLICT; } } } last_fd=fd_i; } /* we have defragmented the pdu, now free all fragments*/ for (fd_i=fd_head->next;fd_i;fd_i=fd_i->next) { if(fd_i->tvb_data){ tvb_free(fd_i->tvb_data); fd_i->tvb_data=NULL; } } /* mark this packet as defragmented */ fd_head->flags |= FD_DEFRAGMENTED; fd_head->reassembled_in=pinfo->fd->num; col_append_fstr(pinfo->cinfo, COL_INFO, " (t4-data Reassembled: %d pack lost, %d pack burst lost)", packet_lost, burst_lost); p_t38_packet_conv_info->packet_lost = packet_lost; p_t38_packet_conv_info->burst_lost = burst_lost; return fd_head; }