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/*
* BIRD -- The Resource Public Key Infrastructure (RPKI) to Router Protocol
*
* (c) 2015 CZ.NIC
* (c) 2015 Pavel Tvrdik <pawel.tvrdik@gmail.com>
*
* This file was a part of RTRlib: http://rpki.realmv6.org/
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
/*
* The RPKI transport sockets implement the communication channel
* (e.g., SSH, TCP, TCP-AO) between an RPKI server and client.
*
* Before using the transport socket, a tr_socket must be
* initialized based on a protocol-dependent init function (e.g.,
* rpki_tr_tcp_init()).
*
* The rpki_tr_* functions call the corresponding function pointers, which are
* passed in the rpki_tr_sock structure, and forward the remaining arguments.
*/
#ifndef _BIRD_RPKI_TRANSPORT_H_
#define _BIRD_RPKI_TRANSPORT_H_
#include <time.h>
/* The return values for rpki_tr_ functions */
enum rpki_tr_rtvals {
RPKI_TR_SUCCESS = 0, /* Operation was successful */
RPKI_TR_ERROR = -1, /* Error occurred */
RPKI_TR_WOULDBLOCK = -2, /* No data is available on the socket */
RPKI_TR_INTR = -3, /* Call was interrupted from a signal */
RPKI_TR_CLOSED = -4 /* Connection closed */
};
/* A transport socket structure */
struct rpki_tr_sock {
sock *sk; /* Standard BIRD socket */
struct rpki_cache *cache; /* Cache server */
int (*open_fp)(struct rpki_tr_sock *); /* Function that establishes the socket connection */
const char *(*ident_fp)(struct rpki_tr_sock *); /* Function that returns an identifier for the socket endpoint */
const char *ident; /* Internal. Use ident_fp() hook instead of this pointer */
};
int rpki_tr_open(struct rpki_tr_sock *tr);
void rpki_tr_close(struct rpki_tr_sock *tr);
const char *rpki_tr_ident(struct rpki_tr_sock *tr);
/* Types of supported transports */
enum rpki_tr_type {
RPKI_TR_TCP, /* Unprotected transport over TCP */
RPKI_TR_SSH, /* Protected transport by SSHv2 connection */
};
/* Common configure structure for transports */
struct rpki_tr_config {
enum rpki_tr_type type; /* RPKI_TR_TCP or RPKI_TR_SSH */
const void *spec; /* Specific transport configuration, i.e. rpki_tr_tcp_config or rpki_tr_ssh_config */
};
struct rpki_tr_tcp_config {
/* No internal configuration data */
};
struct rpki_tr_ssh_config {
const char *bird_private_key; /* Filepath to the BIRD server private key */
const char *cache_public_key; /* Filepath to the public key of cache server, can be file known_hosts */
const char *user; /* Username for SSH connection */
};
/* ssh_transport.c */
void rpki_tr_ssh_init(struct rpki_tr_sock *tr);
/* tcp_transport.c */
void rpki_tr_tcp_init(struct rpki_tr_sock *tr);
#endif /* _BIRD_RPKI_TRANSPORT_H_ */
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