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- #ifndef TINC_PROTOCOL_H
- #define TINC_PROTOCOL_H
- /*
- protocol.h -- header for protocol.c
- Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2015 Guus Sliepen <guus@tinc-vpn.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
- 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.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- /* Protocol version. Different versions are incompatible,
- incompatible version have different protocols.
- */
- #define PROT_CURRENT 17
- /* Silly Windows */
- #ifdef ERROR
- #undef ERROR
- #endif
- /* Request numbers */
- typedef enum request_t {
- PROXY = -2,
- 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 */
- } request_t;
- typedef struct past_request_t {
- char *request;
- time_t firstseen;
- } past_request_t;
- extern bool tunnelserver;
- extern bool strictsubnets;
- /* Maximum size of strings in a request.
- * scanf terminates %2048s with a NUL character,
- * but the NUL character can be written after the 2048th non-NUL character.
- */
- #define MAX_STRING_SIZE 2049
- #define MAX_STRING "%2048s"
- #include "edge.h"
- #include "net.h"
- #include "node.h"
- #include "subnet.h"
- /* Basic functions */
- extern bool send_request(struct connection_t *c, const char *format, ...) __attribute__((__format__(printf, 2, 3)));
- extern void forward_request(struct connection_t *c);
- extern bool receive_request(struct connection_t *c);
- extern bool check_id(const char *name);
- extern void init_requests(void);
- extern void exit_requests(void);
- extern bool seen_request(char *request);
- extern void age_past_requests(void);
- /* Requests */
- extern bool send_id(struct connection_t *c);
- extern bool send_metakey(struct connection_t *c);
- extern bool send_challenge(struct connection_t *c);
- extern bool send_chal_reply(struct connection_t *c);
- extern bool send_ack(struct connection_t *c);
- extern bool send_ping(struct connection_t *c);
- extern bool send_pong(struct connection_t *c);
- extern bool send_add_subnet(struct connection_t *c, const struct subnet_t *subnet);
- extern bool send_del_subnet(struct connection_t *c, const struct subnet_t *subnet);
- extern bool send_add_edge(struct connection_t *c, const struct edge_t *e);
- extern bool send_del_edge(struct connection_t *c, const struct edge_t *e);
- extern void send_key_changed(void);
- extern bool send_req_key(struct node_t *n);
- extern bool send_ans_key(struct node_t *n);
- extern bool send_tcppacket(struct connection_t *c, const struct vpn_packet_t *packet);
- /* Request handlers */
- extern bool id_h(struct connection_t *c);
- extern bool metakey_h(struct connection_t *c);
- extern bool challenge_h(struct connection_t *c);
- extern bool chal_reply_h(struct connection_t *c);
- extern bool ack_h(struct connection_t *c);
- extern bool ping_h(struct connection_t *c);
- extern bool pong_h(struct connection_t *c);
- extern bool add_subnet_h(struct connection_t *c);
- extern bool del_subnet_h(struct connection_t *c);
- extern bool add_edge_h(struct connection_t *c);
- extern bool del_edge_h(struct connection_t *c);
- extern bool key_changed_h(struct connection_t *c);
- extern bool req_key_h(struct connection_t *c);
- extern bool ans_key_h(struct connection_t *c);
- extern bool tcppacket_h(struct connection_t *c);
- #endif
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