diff options
author | Guy Harris <guy@alum.mit.edu> | 2001-06-08 06:27:16 +0000 |
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committer | Guy Harris <guy@alum.mit.edu> | 2001-06-08 06:27:16 +0000 |
commit | c9da803a083959710644b51b2063a58e16854a81 (patch) | |
tree | 7c0357f6cc77b6e5400dce6519619e41c1a8388d /reassemble.h | |
parent | 988785407fd46b441f75f44178f1bc55ddbae5c1 (diff) |
Move the fragment reassembly code into "reassemble.c" and
"reassemble.h", and remove IPv4 dependencies from it.
Use it for OSI CLNP segment reassembly as well.
svn path=/trunk/; revision=3525
Diffstat (limited to 'reassemble.h')
-rw-r--r-- | reassemble.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/reassemble.h b/reassemble.h new file mode 100644 index 0000000000..8b96e72d1a --- /dev/null +++ b/reassemble.h @@ -0,0 +1,77 @@ +/* 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 <gerald@ethereal.com> + * 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); |