2 * Include file for the packet assembly and disassembly layer
3 * Copyright (C) 2004 Jan Kratochvil <project-udpgate@jankratochvil.net>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; exactly version 2 of June 1991 is required
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #ifndef _UDPGATE_PACKET_H
21 #define _UDPGATE_PACKET_H 1
24 #include <glib/gtypes.h>
25 #include <glib/ghash.h>
30 #define HOSTIP_GUINT32_TO_STRING(hostip_guint32) \
31 (udpgate_printf_alloca("%d.%d.%d.%d", \
32 ((hostip_guint32)>>24U)&0xFFU, \
33 ((hostip_guint32)>>16U)&0xFFU, \
34 ((hostip_guint32)>> 8U)&0xFFU, \
35 ((hostip_guint32)>> 0U)&0xFFU))
36 /* Do not use nested udpgate_printf_alloca() - macros cannot nest! */
37 #define SOCKADDR_IN_TO_STRING(sockaddr_in_pointer) ({ \
38 const gchar *_hostip_string=HOSTIP_GUINT32_TO_STRING(ntohl((sockaddr_in_pointer)->sin_addr.s_addr)); \
39 udpgate_printf_alloca("%s:%d",_hostip_string,ntohs((sockaddr_in_pointer)->sin_port)); \
42 #define PACKET_HEADER "UDPGate0"
44 #define PACKET_ELEM_ATTR_MANDATORY (0x80000000)
45 #define PACKET_ELEM_ATTR_OPTIONAL (0x00000000)
46 enum packet_elem_type {
47 PACKET_ELEM_TYPE_PROGRAM_VERSION=(0x01|PACKET_ELEM_ATTR_MANDATORY), /* 'VERSION' string */
48 PACKET_ELEM_TYPE_CLIENT_INADDR =(0x02|PACKET_ELEM_ATTR_MANDATORY), /* host order */
49 PACKET_ELEM_TYPE_CLIENT_PORT =(0x03|PACKET_ELEM_ATTR_MANDATORY), /* host order */
50 PACKET_ELEM_TYPE_DATA_GUINT32 =(0x04|PACKET_ELEM_ATTR_MANDATORY), /* user data (e.g. unique id) */
53 gpointer packet_assembly(size_t *packet_length_pointer,GHashTable *values);
54 gboolean packet_recognized(gconstpointer packet,size_t packet_length);
55 GHashTable *packet_disassembly(gconstpointer packet,size_t packet_length);
56 void packet_disassembly_destroy(GHashTable *hash);
61 #endif /* _UDPGATE_PACKET_H */