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/*
tunnel.h
Copyright (C) 1999 Lars Brinkhoff. See COPYING for terms and conditions.
*/
/*
This is the programming interface to the HTTP tunnel. It consists
of the following functions:
Tunnel *tunnel_new_client (const char *host, int host_port,
const char *proxy, int proxy_port,
size_t content_length);
Create a new HTTP tunnel client.
Tunnel *tunnel_new_server (const char *host,
int port,
size_t content_length);
Create a new HTTP tunnel server. If LENGTH is 0, the Content-Length
of the HTTP GET response will be determined automatically in some way.
If HOST is not NULL, use it to bind the server socket to a specific
network interface.
int tunnel_connect (Tunnel *tunnel);
Open the tunnel. (Client only.)
int tunnel_accept (Tunnel *tunnel);
Accept a tunnel connection. (Server only.)
int tunnel_pollin_fd (Tunnel *tunnel);
Return a file descriptor that can be used to poll for input from
the tunnel.
ssize_t tunnel_read (Tunnel *tunnel, void *data, size_t length);
ssize_t tunnel_write (Tunnel *tunnel, void *data, size_t length);
Read or write to the tunnel. Same semantics as with read() and
write(). Watch out for return values less than LENGTH.
int tunnel_padding (Tunnel *tunnel, size_t length);
Send LENGTH pad bytes.
int tunnel_maybe_pad (Tunnel *tunnel, size_t length);
Pad to nearest even multiple of LENGTH.
int tunnel_close (Tunnel *tunnel);
Close the tunnel.
void tunnel_destroy (Tunnel *tunnel);
*/
#ifndef TUNNEL_H
#define TUNNEL_H
#include "config.h"
#include <sys/types.h>
#define DEFAULT_CONNECTION_MAX_TIME 300
typedef struct tunnel Tunnel;
extern Tunnel *tunnel_new_client (const char *host, int host_port,
const char *proxy, int proxy_port,
size_t content_length);
extern Tunnel *tunnel_new_server (const char *host, int port,
size_t content_length);
extern int tunnel_connect (Tunnel *tunnel);
extern int tunnel_accept (Tunnel *tunnel);
extern int tunnel_pollin_fd (Tunnel *tunnel);
extern ssize_t tunnel_read (Tunnel *tunnel, void *data, size_t length);
extern ssize_t tunnel_write (Tunnel *tunnel, void *data, size_t length);
extern ssize_t tunnel_padding (Tunnel *tunnel, size_t length);
extern int tunnel_maybe_pad (Tunnel *tunnel, size_t length);
extern int tunnel_setopt (Tunnel *tunnel, const char *opt, void *data);
extern int tunnel_getopt (Tunnel *tunnel, const char *opt, void *data);
extern int tunnel_close (Tunnel *tunnel);
extern void tunnel_destroy (Tunnel *tunnel);
#endif /* TUNNEL_H */
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