uhub/src/network/connection.h

120 lines
4.2 KiB
C
Raw Normal View History

/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2013, Jan Vidar Krey
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef HAVE_UHUB_NETWORK_CONNECTION_H
#define HAVE_UHUB_NETWORK_CONNECTION_H
#include "uhub.h"
#include "network/common.h"
#include "network/backend.h"
2012-10-12 12:24:03 +00:00
#include "network/tls.h"
#define NET_EVENT_TIMEOUT 0x0001
#define NET_EVENT_READ 0x0002
#define NET_EVENT_WRITE 0x0004
struct net_connection
{
NET_CON_STRUCT_COMMON
};
struct net_connect_handle;
enum net_connect_status
{
net_connect_status_ok = 0,
net_connect_status_host_not_found = -1,
net_connect_status_no_address = -2,
net_connect_status_dns_error = -3,
net_connect_status_refused = -4,
net_connect_status_unreachable = -5,
net_connect_status_timeout = -6,
net_connect_status_socket_error = -7,
};
typedef void (*net_connect_cb)(struct net_connect_handle*, enum net_connect_status status, struct net_connection* con, void* ptr);
extern int net_con_get_sd(struct net_connection* con);
extern void* net_con_get_ptr(struct net_connection* con);
2009-12-14 12:06:52 +00:00
extern struct net_connection* net_con_create();
/**
* Establish an outbound TCP connection.
* This will resolve the IP-addresses, and connect to
* either an IPv4 or IPv6 address depending if it is supported,
* and using the happy eyeballs algorithm.
*
* @param address Hostname, IPv4 or IPv6 address
* @param port TCP port number
* @param callback A callback to be called once the connection is established, or failed.
* @returns a handle to the connection establishment job, or NULL if an immediate error.
*/
extern struct net_connect_handle* net_con_connect(const char* address, uint16_t port, net_connect_cb callback, void* ptr);
extern void net_connect_destroy(struct net_connect_handle* handle);
2009-12-14 12:06:52 +00:00
extern void net_con_destroy(struct net_connection*);
extern void net_con_initialize(struct net_connection* con, int sd, net_connection_cb callback, const void* ptr, int events);
extern void net_con_reinitialize(struct net_connection* con, net_connection_cb callback, const void* ptr, int events);
extern void net_con_update(struct net_connection* con, int events);
extern void net_con_callback(struct net_connection* con, int events);
2009-09-04 15:18:38 +00:00
/**
* Close the connection.
* This will ensure a connection is closed properly and will generate a NET_EVENT_DESTROYED event which indicates
* that the con can safely be deleted (or set to NULL).
2009-09-04 15:18:38 +00:00
*/
extern void net_con_close(struct net_connection* con);
2009-08-03 00:50:51 +00:00
/**
* Send data
*
* @return returns the number of bytes sent.
* 0 if no data is sent, and this function should be called again (EWOULDBLOCK/EINTR)
* <0 if an error occured, the negative number contains the error code.
2009-08-03 00:50:51 +00:00
*/
extern ssize_t net_con_send(struct net_connection* con, const void* buf, size_t len);
/**
* Receive data
*
* @return returns the number of bytes sent.
* 0 if no data is sent, and this function should be called again (EWOULDBLOCK/EINTR)
* <0 if an error occured, the negative number contains the error code.
2009-08-03 00:50:51 +00:00
*/
extern ssize_t net_con_recv(struct net_connection* con, void* buf, size_t len);
/**
* Receive data without removing them from the recv() buffer.
* NOTE: This does not currently work for SSL connections after the SSL handshake has been
* performed.
*/
extern ssize_t net_con_peek(struct net_connection* con, void* buf, size_t len);
/**
* Set timeout for connetion.
*
* @param seconds the number of seconds into the future.
*/
extern void net_con_set_timeout(struct net_connection* con, int seconds);
extern void net_con_clear_timeout(struct net_connection* con);
#endif /* HAVE_UHUB_NETWORK_CONNECTION_H */