126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/*
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protocol.h -- header for protocol.c
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Copyright (C) 1999-2005 Ivo Timmermans,
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2000-2015 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __TINC_PROTOCOL_H__
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#define __TINC_PROTOCOL_H__
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/* Protocol version. Different versions are incompatible,
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incompatible version have different protocols.
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*/
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#define PROT_CURRENT 17
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/* Silly Windows */
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#ifdef ERROR
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#undef ERROR
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#endif
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/* Request numbers */
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typedef enum request_t {
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PROXY = -2,
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ALL = -1, /* Guardian for allow_request */
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ID = 0, METAKEY, CHALLENGE, CHAL_REPLY, ACK,
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STATUS, ERROR, TERMREQ,
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PING, PONG,
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ADD_SUBNET, DEL_SUBNET,
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ADD_EDGE, DEL_EDGE,
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KEY_CHANGED, REQ_KEY, ANS_KEY,
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PACKET,
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LAST /* Guardian for the highest request number */
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} request_t;
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typedef struct past_request_t {
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char *request;
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time_t firstseen;
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} past_request_t;
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extern bool tunnelserver;
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extern bool strictsubnets;
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/* Maximum size of strings in a request.
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* scanf terminates %2048s with a NUL character,
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* but the NUL character can be written after the 2048th non-NUL character.
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*/
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#define MAX_STRING_SIZE 2049
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#define MAX_STRING "%2048s"
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#include "edge.h"
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#include "net.h"
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#include "node.h"
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#include "subnet.h"
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/* Basic functions */
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extern bool send_request(struct connection_t *, const char *, ...) __attribute__ ((__format__(printf, 2, 3)));
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extern void forward_request(struct connection_t *);
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extern bool receive_request(struct connection_t *);
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extern bool check_id(const char *);
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extern void init_requests(void);
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extern void exit_requests(void);
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extern bool seen_request(char *);
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extern void age_past_requests(void);
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/* Requests */
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extern bool send_id(struct connection_t *);
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extern bool send_metakey(struct connection_t *);
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extern bool send_challenge(struct connection_t *);
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extern bool send_chal_reply(struct connection_t *);
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extern bool send_ack(struct connection_t *);
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extern bool send_status(struct connection_t *, int, const char *);
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extern bool send_error(struct connection_t *, int,const char *);
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extern bool send_termreq(struct connection_t *);
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extern bool send_ping(struct connection_t *);
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extern bool send_pong(struct connection_t *);
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extern bool send_add_subnet(struct connection_t *, const struct subnet_t *);
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extern bool send_del_subnet(struct connection_t *, const struct subnet_t *);
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extern bool send_add_edge(struct connection_t *, const struct edge_t *);
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extern bool send_del_edge(struct connection_t *, const struct edge_t *);
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extern void send_key_changed(void);
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extern bool send_req_key(struct node_t *);
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extern bool send_ans_key(struct node_t *);
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extern bool send_tcppacket(struct connection_t *, const struct vpn_packet_t *);
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/* Request handlers */
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extern bool id_h(struct connection_t *);
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extern bool metakey_h(struct connection_t *);
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extern bool challenge_h(struct connection_t *);
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extern bool chal_reply_h(struct connection_t *);
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extern bool ack_h(struct connection_t *);
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extern bool status_h(struct connection_t *);
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extern bool error_h(struct connection_t *);
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extern bool termreq_h(struct connection_t *);
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extern bool ping_h(struct connection_t *);
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extern bool pong_h(struct connection_t *);
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extern bool add_subnet_h(struct connection_t *);
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extern bool del_subnet_h(struct connection_t *);
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extern bool add_edge_h(struct connection_t *);
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extern bool del_edge_h(struct connection_t *);
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extern bool key_changed_h(struct connection_t *);
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extern bool req_key_h(struct connection_t *);
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extern bool ans_key_h(struct connection_t *);
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extern bool tcppacket_h(struct connection_t *);
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#endif /* __TINC_PROTOCOL_H__ */
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