/* reassemble.h * Declarations of outines for {fragment,segment} reassembly * * $Id: reassemble.h,v 1.1 2001/06/08 06:27:16 guy Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* make sure that all flags that are set in a fragment entry is also set for * the flags field of fd_head !!! */ /* only in fd_head: packet is defragmented */ #define FD_DEFRAGMENTED 0x0001 /* there are overlapping fragments */ #define FD_OVERLAP 0x0002 /* overlapping fragments contain different data */ #define FD_OVERLAPCONFLICT 0x0004 /* more than one fragment which indicates end-of data */ #define FD_MULTIPLETAILS 0x0008 /* fragment contains data past the end of the datagram */ #define FD_TOOLONGFRAGMENT 0x0010 typedef struct _fragment_data { struct _fragment_data *next; guint32 frame; guint32 offset; guint32 len; guint32 datalen; /*Only valid in first item of list */ guint32 flags; unsigned char *data; } fragment_data; /* * Initialize a fragment table. */ void fragment_table_init(GHashTable **fragment_table); /* * Free up all space allocated for fragment keys and data. */ void reassemble_init(void); /* * This function adds a new fragment to the fragment hash table. * If this is the first fragment seen for this datagram, a new entry * is created in the hash table, otherwise this fragment is just added * to the linked list of fragments for this packet. * The list of fragments for a specific datagram is kept sorted for * easier handling. * * Returns a pointer to the head of the fragment data list if we have all the * fragments, NULL otherwise. */ fragment_data *fragment_add(tvbuff_t *tvb, int offset, packet_info *pinfo, guint32 id, GHashTable *fragment_table, guint32 frag_offset, guint32 frag_data_len, gboolean more_frags);