2 protocol.h -- header for protocol.c
3 Copyright (C) 1999-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
4 2000-2005 Guus Sliepen <guus@tinc-vpn.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #ifndef __TINC_PROTOCOL_H__
24 #define __TINC_PROTOCOL_H__
26 /* Protocol version. Different versions are incompatible,
27 incompatible version have different protocols.
30 #define PROT_CURRENT 17
40 typedef enum request_t {
41 ALL = -1, /* Guardian for allow_request */
42 ID = 0, METAKEY, CHALLENGE, CHAL_REPLY, ACK,
43 STATUS, ERROR, TERMREQ,
45 ADD_SUBNET, DEL_SUBNET,
47 KEY_CHANGED, REQ_KEY, ANS_KEY,
49 LAST /* Guardian for the highest request number */
52 typedef struct past_request_t {
57 extern bool tunnelserver;
59 /* Maximum size of strings in a request.
60 * scanf terminates %2048s with a NUL character,
61 * but the NUL character can be written after the 2048th non-NUL character.
64 #define MAX_STRING_SIZE 2049
65 #define MAX_STRING "%2048s"
74 extern bool send_request(struct connection_t *, const char *, ...) __attribute__ ((__format__(printf, 2, 3)));
75 extern void forward_request(struct connection_t *);
76 extern bool receive_request(struct connection_t *);
77 extern bool check_id(const char *);
79 extern void init_requests(void);
80 extern void exit_requests(void);
81 extern bool seen_request(char *);
82 extern void age_past_requests(void);
86 extern bool send_id(struct connection_t *);
87 extern bool send_metakey(struct connection_t *);
88 extern bool send_challenge(struct connection_t *);
89 extern bool send_chal_reply(struct connection_t *);
90 extern bool send_ack(struct connection_t *);
91 extern bool send_status(struct connection_t *, int, const char *);
92 extern bool send_error(struct connection_t *, int,const char *);
93 extern bool send_termreq(struct connection_t *);
94 extern bool send_ping(struct connection_t *);
95 extern bool send_pong(struct connection_t *);
96 extern bool send_add_subnet(struct connection_t *, const struct subnet_t *);
97 extern bool send_del_subnet(struct connection_t *, const struct subnet_t *);
98 extern bool send_add_edge(struct connection_t *, const struct edge_t *);
99 extern bool send_del_edge(struct connection_t *, const struct edge_t *);
100 extern bool send_key_changed(struct connection_t *, const struct node_t *);
101 extern bool send_req_key(struct connection_t *, const struct node_t *, const struct node_t *);
102 extern bool send_ans_key(struct connection_t *, const struct node_t *, const struct node_t *);
103 extern bool send_tcppacket(struct connection_t *, struct vpn_packet_t *);
105 /* Request handlers */
107 extern bool id_h(struct connection_t *);
108 extern bool metakey_h(struct connection_t *);
109 extern bool challenge_h(struct connection_t *);
110 extern bool chal_reply_h(struct connection_t *);
111 extern bool ack_h(struct connection_t *);
112 extern bool status_h(struct connection_t *);
113 extern bool error_h(struct connection_t *);
114 extern bool termreq_h(struct connection_t *);
115 extern bool ping_h(struct connection_t *);
116 extern bool pong_h(struct connection_t *);
117 extern bool add_subnet_h(struct connection_t *);
118 extern bool del_subnet_h(struct connection_t *);
119 extern bool add_edge_h(struct connection_t *);
120 extern bool del_edge_h(struct connection_t *);
121 extern bool key_changed_h(struct connection_t *);
122 extern bool req_key_h(struct connection_t *);
123 extern bool ans_key_h(struct connection_t *);
124 extern bool tcppacket_h(struct connection_t *);
126 #endif /* __TINC_PROTOCOL_H__ */