2 * nbtscanner -- a tool for scanning large networks for SMB servers.
4 * id_list.h: Prototypes and structures for keeping track of the packet IDs.
5 * Copyright (C) 2000 Steinar H. Gunderson
7 * Large amounts of code adapted from Samba (http://www.samba.org/)
8 * Copyright (C) Andrew Tridgell 1994-1998, and others.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <netinet/in.h>
32 * There's quite some data duplication here, in the interest of speed and code
37 unsigned short id; /* ID number from NBT packet */
38 int in_use; /* Are we awaiting a reply on this ID? */
40 struct in_addr sin; /* IP address we've sent it to */
41 struct timeval timestamp; /* When we sent the packet */
42 int retries; /* Number of retries tried */
44 /* we list on index entry instead of using pointers */
49 struct id_list_entry {
50 struct id_list_entry *next;
55 * a list of all the available ID numbers (sin is unused, in_use = 0)
57 * We could have a used_id list as well, but it would require a doubly
58 * linked list, and perhaps doesn't help all that much anyways
60 extern struct id_list_entry *head_free_id;
62 /* an array with a one-to-one mapping of the array index vs. the id field */
63 extern struct id_entry ids[];
66 void id_list_destroy();
67 void id_free(struct id_entry *i);
68 void id_mark_free(struct id_entry *i);
69 struct id_entry *id_get_free_id();
70 int id_cleanup(int timeout_ms);
71 int get_num_free_ids();
73 #endif /* _ID_LIST_H */