tinc/src/protocol.h

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/*
protocol.h -- header for protocol.c
Copyright (C) 1999-2001 Ivo Timmermans <ivo@o2w.nl>,
2000,2001 Guus Sliepen <guus@sliepen.eu.org>
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: protocol.h,v 1.5.4.36 2002/09/09 22:32:55 guus Exp $
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*/
#ifndef __TINC_PROTOCOL_H__
#define __TINC_PROTOCOL_H__
#include "net.h"
#include "node.h"
#include "edge.h"
#include "subnet.h"
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/* Protocol version. Different versions are incompatible,
incompatible version have different protocols.
*/
#define PROT_CURRENT 17
/* Request numbers */
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enum {
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ALL = -1, /* Guardian for allow_request */
ID = 0, METAKEY, CHALLENGE, CHAL_REPLY, ACK,
STATUS, ERROR, TERMREQ,
PING, PONG,
ADD_SUBNET, DEL_SUBNET,
ADD_EDGE, DEL_EDGE,
KEY_CHANGED, REQ_KEY, ANS_KEY,
PACKET,
LAST /* Guardian for the highest request number */
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};
typedef struct past_request_t {
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char *request;
time_t firstseen;
} past_request_t;
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/* Maximum size of strings in a request */
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#define MAX_STRING_SIZE 2048
#define MAX_STRING "%2048s"
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/* Basic functions */
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extern int send_request(connection_t *, const char *, ...);
extern int forward_request(connection_t *);
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extern int receive_request(connection_t *);
extern int check_id(char *);
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extern void init_requests(void);
extern void exit_requests(void);
extern int seen_request(char *);
extern void age_past_requests(void);
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/* Requests */
extern int send_id(connection_t *);
extern int send_metakey(connection_t *);
extern int send_challenge(connection_t *);
extern int send_chal_reply(connection_t *);
extern int send_ack(connection_t *);
extern int send_status(connection_t *, int, char *);
extern int send_error(connection_t *, int, char *);
extern int send_termreq(connection_t *);
extern int send_ping(connection_t *);
extern int send_pong(connection_t *);
extern int send_add_subnet(connection_t *, subnet_t *);
extern int send_del_subnet(connection_t *, subnet_t *);
extern int send_add_edge(connection_t *, edge_t *);
extern int send_del_edge(connection_t *, edge_t *);
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extern int send_key_changed(connection_t *, node_t *);
extern int send_req_key(connection_t *, node_t *, node_t *);
extern int send_ans_key(connection_t *, node_t *, node_t *);
extern int send_tcppacket(connection_t *, vpn_packet_t *);
/* Request handlers */
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extern int (*request_handlers[])(connection_t *);
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extern int id_h(connection_t *);
extern int metakey_h(connection_t *);
extern int challenge_h(connection_t *);
extern int chal_reply_h(connection_t *);
extern int ack_h(connection_t *);
extern int status_h(connection_t *);
extern int error_h(connection_t *);
extern int termreq_h(connection_t *);
extern int ping_h(connection_t *);
extern int pong_h(connection_t *);
extern int add_subnet_h(connection_t *);
extern int del_subnet_h(connection_t *);
extern int add_edge_h(connection_t *);
extern int del_edge_h(connection_t *);
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extern int key_changed_h(connection_t *);
extern int req_key_h(connection_t *);
extern int ans_key_h(connection_t *);
extern int tcppacket_h(connection_t *);
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#endif /* __TINC_PROTOCOL_H__ */