X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol.h;h=47f772c7de41eecdc24c305a7701915754689dab;hp=2713df978f1261b821f63486b809088475988d06;hb=8b2b67e26c5b971761f5015764d5e188f6343bc4;hpb=ca73b722cbad5a08ec9bb5026ed5129da9a24bd8 diff --git a/src/protocol.h b/src/protocol.h index 2713df97..47f772c7 100644 --- a/src/protocol.h +++ b/src/protocol.h @@ -1,6 +1,7 @@ /* protocol.h -- header for protocol.c - Copyright (C) 1999 Ivo Timmermans + Copyright (C) 1999-2001 Ivo Timmermans , + 2000,2001 Guus Sliepen 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 @@ -15,117 +16,107 @@ 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 1.5.4.34 2002/09/04 16:26:45 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_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_NODE, DEL_NODE, + ADD_SUBNET, DEL_SUBNET, + ADD_EDGE, DEL_EDGE, + KEY_CHANGED, REQ_KEY, ANS_KEY, + PACKET, + LAST /* Guardian for the highest request number */ }; -typedef struct add_host_t { - unsigned char type; - char unused1; - ip_t real_ip; - ip_t vpn_ip; - ip_t vpn_mask; - unsigned short portnr; -} add_host_t; - -typedef struct termreq_t { - unsigned char type; - char unused1; - ip_t vpn_ip; -} termreq_t; - -typedef struct basic_info_t { - unsigned char type; - unsigned char protocol; - unsigned short portnr; - ip_t vpn_ip; - ip_t vpn_mask; -} basic_info_t; - -typedef struct calculate_t { - unsigned char type; - char unused1; - unsigned short len; - char key; -} calculate_t; - -typedef struct public_key_t { - unsigned char type; - char unused1; - unsigned short len; - char key; -} public_key_t; - -typedef struct key_req_t { - unsigned char type; - char unused1; - ip_t from; - ip_t to; - time_t expiry; - short int len; /* 0 if requesting */ - char key; -} key_req_t; - -typedef struct key_changed_t { - unsigned char type; - char unused1; - ip_t from; -} key_changed_t; - -typedef struct del_host_t { - unsigned char type; - char unused1; - ip_t vpn_ip; -} del_host_t; - -extern int (*request_handlers[256])(conn_list_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_changed2(void); +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*, ...); +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_node(connection_t *, node_t *); +// extern int send_del_node(connection_t *, node_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 *); + +/* Request handlers */ + +extern int (*request_handlers[])(connection_t *); + +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_node_h(connection_t *); +// extern int del_node_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__ */ -