1 #ifndef TINC_PROTOCOL_H
2 #define TINC_PROTOCOL_H
5 protocol.h -- header for protocol.c
6 Copyright (C) 1999-2005 Ivo Timmermans,
7 2000-2015 Guus Sliepen <guus@tinc-vpn.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 /* Protocol version. Different versions are incompatible,
25 incompatible version have different protocols.
28 #define PROT_CURRENT 17
38 typedef enum request_t {
40 ALL = -1, /* Guardian for allow_request */
41 ID = 0, METAKEY, CHALLENGE, CHAL_REPLY, ACK,
42 STATUS, ERROR, TERMREQ,
44 ADD_SUBNET, DEL_SUBNET,
46 KEY_CHANGED, REQ_KEY, ANS_KEY,
48 LAST /* Guardian for the highest request number */
51 typedef struct past_request_t {
56 extern bool tunnelserver;
57 extern bool strictsubnets;
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 *c, const char *format, ...) __attribute__((__format__(printf, 2, 3)));
75 extern void forward_request(struct connection_t *c);
76 extern bool receive_request(struct connection_t *c);
77 extern bool check_id(const char *name);
79 extern void init_requests(void);
80 extern void exit_requests(void);
81 extern bool seen_request(char *request);
82 extern void age_past_requests(void);
86 extern bool send_id(struct connection_t *c);
87 extern bool send_metakey(struct connection_t *c);
88 extern bool send_challenge(struct connection_t *c);
89 extern bool send_chal_reply(struct connection_t *c);
90 extern bool send_ack(struct connection_t *c);
91 extern bool send_ping(struct connection_t *c);
92 extern bool send_pong(struct connection_t *c);
93 extern bool send_add_subnet(struct connection_t *c, const struct subnet_t *subnet);
94 extern bool send_del_subnet(struct connection_t *c, const struct subnet_t *subnet);
95 extern bool send_add_edge(struct connection_t *c, const struct edge_t *e);
96 extern bool send_del_edge(struct connection_t *c, const struct edge_t *e);
97 extern void send_key_changed(void);
98 extern bool send_req_key(struct node_t *n);
99 extern bool send_ans_key(struct node_t *n);
100 extern bool send_tcppacket(struct connection_t *c, const struct vpn_packet_t *packet);
102 /* Request handlers */
104 extern bool id_h(struct connection_t *c);
105 extern bool metakey_h(struct connection_t *c);
106 extern bool challenge_h(struct connection_t *c);
107 extern bool chal_reply_h(struct connection_t *c);
108 extern bool ack_h(struct connection_t *c);
109 extern bool ping_h(struct connection_t *c);
110 extern bool pong_h(struct connection_t *c);
111 extern bool add_subnet_h(struct connection_t *c);
112 extern bool del_subnet_h(struct connection_t *c);
113 extern bool add_edge_h(struct connection_t *c);
114 extern bool del_edge_h(struct connection_t *c);
115 extern bool key_changed_h(struct connection_t *c);
116 extern bool req_key_h(struct connection_t *c);
117 extern bool ans_key_h(struct connection_t *c);
118 extern bool tcppacket_h(struct connection_t *c);