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/**
* @file net.h
* @brief Cross platform UDP network code.
*
* $LicenseInfo:firstyear=2000&license=viewergpl$
*
* Copyright (c) 2000-2009, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_NET_H
#define LL_NET_H
class LLTimer;
class LLHost;
#define NET_BUFFER_SIZE (0x2000)
// Request a free local port from the operating system
#define NET_USE_OS_ASSIGNED_PORT 0
// Returns 0 on success, non-zero on error.
// Sets socket handler/descriptor, changes nPort if port requested is unavailable.
S32 start_net(S32& socket_out, int& nPort);
void end_net(S32& socket_out);
// returns size of packet or -1 in case of error
S32 receive_packet(int hSocket, char * receiveBuffer);
BOOL send_packet(int hSocket, const char *sendBuffer, int size, U32 recipient, int nPort); // Returns TRUE on success.
//void get_sender(char * tmp);
LLHost get_sender();
U32 get_sender_port();
U32 get_sender_ip(void);
LLHost get_receiving_interface();
U32 get_receiving_interface_ip(void);
const char* u32_to_ip_string(U32 ip); // Returns pointer to internal string buffer, "(bad IP addr)" on failure, cannot nest calls
char* u32_to_ip_string(U32 ip, char *ip_string); // NULL on failure, ip_string on success, you must allocate at least MAXADDRSTR chars
U32 ip_string_to_u32(const char* ip_string); // Wrapper for inet_addr()
extern const char* LOOPBACK_ADDRESS_STRING;
void tcp_close_channel(S32 handle);
S32 tcp_open_channel(LLHost host);
int tcp_handshake(S32 handle, char * dataout, int outlen, char * datain, int maxinlen);
// useful MTU consts
const S32 MTUBYTES = 1200; // 1500 = standard Ethernet MTU
const S32 ETHERNET_MTU_BYTES = 1500;
const S32 MTUBITS = MTUBYTES*8;
const S32 MTUU32S = MTUBITS/32;
#endif
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