/*
protocol.h -- header for protocol.c
- Copyright (C) 1999,2000 Ivo Timmermans <zarq@iname.com>
+ Copyright (C) 1999-2001 Ivo Timmermans <ivo@o2w.nl>,
+ 2000,2001 Guus Sliepen <guus@sliepen.eu.org>
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
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.
+
+ $Id: protocol.h,v 1.5.4.38 2003/07/06 23:16:28 guus Exp $
*/
#ifndef __TINC_PROTOCOL_H__
#define __TINC_PROTOCOL_H__
#include "net.h"
+#include "node.h"
+#include "edge.h"
+#include "subnet.h"
-enum {
- PROT_RESERVED = 0, /* reserved: do not use. */
- PROT_NOT_IN_USE,
- PROT_TOO_OLD = 2,
- PROT_3,
- PROT_4,
- PROT_ECHELON,
- PROT_6,
- PROT_CURRENT, /* protocol currently in use */
-};
+/* Protocol version. Different versions are incompatible,
+ incompatible version have different protocols.
+ */
+
+#define PROT_CURRENT 17
+
+/* Request numbers */
enum {
- ACK = 1, /* acknowledged */
- AUTH_S_INIT = 10, /* initiate authentication */
- AUTH_C_INIT,
- AUTH_S_SPP, /* send passphrase */
- AUTH_C_SPP,
- AUTH_S_SKEY, /* send g^k */
- AUTH_C_SKEY,
- AUTH_S_SACK, /* send ack */
- AUTH_C_RACK, /* waiting for ack */
- TERMREQ = 30, /* terminate connection */
- PINGTIMEOUT, /* terminate due to ping t.o. */
- DEL_HOST, /* forward a termreq to others */
- PING = 40, /* ping */
- PONG,
- ADD_HOST = 60, /* Add new given host to connection list */
- BASIC_INFO, /* some basic info follows */
- PASSPHRASE, /* encrypted passphrase */
- PUBLIC_KEY, /* public key in base-36 */
- HOLD = 80, /* don't send any data */
- RESUME, /* resume dataflow with new encryption key */
- CALCULATE = 100, /* calculate the following numer^privkey and send me the result */
- CALC_RES, /* result of the above */
- ALMOST_KEY, /* this number^privkey is the shared key */
- REQ_KEY = 160, /* request public key */
- ANS_KEY, /* answer to such request */
- KEY_CHANGED, /* public key has changed */
+ 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 */
};
-extern int (*request_handlers[256])(conn_list_t*);
+typedef struct past_request_t {
+ char *request;
+ time_t firstseen;
+} past_request_t;
+
+/* Maximum size of strings in a request */
+
+#define MAX_STRING_SIZE 2048
+#define MAX_STRING "%2048s"
+
+/* Basic functions */
+
+extern int send_request(connection_t *, const char *, ...) __attribute__ ((format(printf, 2, 3)));
+extern int forward_request(connection_t *);
+extern int receive_request(connection_t *);
+extern int check_id(char *);
+
+extern void init_requests(void);
+extern void exit_requests(void);
+extern int seen_request(char *);
+extern void age_past_requests(void);
+
+/* 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 *);
+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 *);
-extern int send_ping(conn_list_t*);
-extern int send_basic_info(conn_list_t *);
-extern int send_termreq(conn_list_t *);
-extern int send_timeout(conn_list_t *);
-extern int send_key_request(ip_t);
-extern void send_key_changed_all(void);
+/* Request handlers */
-#endif /* __TINC_PROTOCOL_H__ */
+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 *);
+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 *);
+#endif /* __TINC_PROTOCOL_H__ */
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