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/**
* @file net.h
* @brief Cross platform UDP network code.
*
* $LicenseInfo:firstyear=2000&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#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;
extern const char* BROADCAST_ADDRESS_STRING;
// 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;
// For automatic port discovery when running multiple viewers on one host
const U32 PORT_DISCOVERY_RANGE_MIN = 13000;
const U32 PORT_DISCOVERY_RANGE_MAX = PORT_DISCOVERY_RANGE_MIN + 50;
#endif
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