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/***************************************************************************
* *
* _____ ____ *
* | __ \ / __ \ _ _ _____ *
* | | \ \ / / \_\ | | | | _ \ *
* | | \ \| | | | | | |_| | *
* | | | || | | | | | ___/ *
* | | / /| | __ | | | | _ \ *
* | |__/ / \ \__/ / | |___| | |_| | *
* |_____/ \____/ |_____|_|_____/ *
* *
* Wiimms source code library *
* *
***************************************************************************
* *
* Copyright (c) 2012-2024 by Dirk Clemens <wiimm@wiimm.de> *
* *
***************************************************************************
* *
* This library 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 2 of the License, or *
* (at your option) any later version. *
* *
* 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 General Public License for more details. *
* *
* See file gpl-2.0.txt or http://www.gnu.org/licenses/gpl-2.0.txt *
* *
***************************************************************************/
#ifndef DCLIB_NETWORK_LINUX_H
#define DCLIB_NETWORK_LINUX_H 1
#ifndef DCLIB_NETWORK_H
#include "dclib-network.h"
#endif
//
///////////////////////////////////////////////////////////////////////////////
/////////////// IP/UDP ///////////////
///////////////////////////////////////////////////////////////////////////////
ssize_t ReceiveUDPv4
(
int sock, // valid socket
void *buf, // buffer tostore incoming data
size_t buf_size, // size of buffer
int flags, // flags for recffrom() or recvmsg()
struct sockaddr_in *src_addr, // not NULL: stire source address
in_addr_t *dest_addr // not NULL: store destination IPv4 (NBO)
);
///////////////////////////////////////////////////////////////////////////////
ssize_t SendUDPv4
(
int sock, // valid socket
const void *data, // data to send
size_t data_size, // size of data
int flags, // flags for sendto() or sendmsg()
struct sockaddr_in *dest_addr, // destination address (NULL possible)
in_addr_t src_addr // not 0: source IPv4 (NBO)
);
///////////////////////////////////////////////////////////////////////////////
ssize_t recvfrom2
(
int sock,
void *buf,
size_t buf_size,
int flags,
struct sockaddr *src_addr,
socklen_t *src_addrlen,
struct sockaddr *dest_addr,
socklen_t *dest_addrlen
);
//-----------------------------------------------------------------------------
ssize_t sendto2
(
int sock,
const void *buf,
size_t buf_size,
int flags,
struct sockaddr *dest_addr,
socklen_t dest_addrlen,
struct sockaddr_in *src_addr,
socklen_t src_addrlen
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// SendRawUDP() ///////////////
///////////////////////////////////////////////////////////////////////////////
enumError SendRawUDP
(
// Capability CAP_NET_RAW needed (or effective user ID of 0).
int sock, // RAW socket to use,
// if -1: open and close private socket
ccp send_addr, // NULL or sender address:port
u32 send_ip4, // fall back IP4, if 'send_addr' empty
u16 send_port, // default sender port
ccp recv_addr, // NULL or receiver address:port
u32 recv_ip4, // fall back IP4, if 'recv_addr' empty
u16 recv_port, // default receiver port
const void *data, // data to send
uint size, // size of 'data'
uint log_mode // 0:silent, >0:print errors,
// >=0x10: hexdump data, 'lmode' bytes max
);
//-----------------------------------------------------------------------------
enumError SendRawUDPsa
(
// Capability CAP_NET_RAW needed (or effective user ID of 0).
int sock, // RAW socket to use,
// if -1: open and close private socket
struct sockaddr_in *sa_send, // sockaddr of sender
struct sockaddr_in *sa_recv, // sockaddr of receiver
const void *data, // data to send
uint size, // size of 'data'
uint log_mode // 0:silent, >0:print errors,
// >=0x10: hexdump data, 'lmode' bytes max
);
//-----------------------------------------------------------------------------
uint SetupRawUDPsa
(
// returns total packet len (mabe with limited 'size')
udp_packet_t *pkt, // paket header to setup (cleared and written)
struct sockaddr_in *sa_send, // sockaddr of sender
struct sockaddr_in *sa_recv, // sockaddr of receiver
const void *data, // data to send
uint size // size of 'data'
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// Routing Support ///////////////
///////////////////////////////////////////////////////////////////////////////
// all IP4 in network byte order
typedef struct RouteIP4_t
{
//--- returned data
int index; // entry index, starts with 0, incremented for each found
// -1: invalid data
char *iface; // pointer into 'buf': interface name
u32 dest; // destination address, network byte order
u32 mask; // destination network mask, network byte order
u32 gate; // gateway address, network byte order
u32 flags; // routing flags
//--- internal data
FILE *f; // open file
uint col_iface; // column index for 'iface'
uint col_dest; // column index for 'dest'
uint col_mask; // column index for 'mask'
uint col_gate; // column index for 'gate'
uint col_flags; // column index for 'flags'
char buf[200]; // line buffer for /proc/net/route
}
RouteIP4_t;
///////////////////////////////////////////////////////////////////////////////
bool OpenRouteScanIP4
(
// returns TRUE on success and FALSE if no element is found
RouteIP4_t *rt // valid data, will be initialized
);
bool NextRouteScanIP4
(
// returns TRUE on success and FALSE if no more element is found
RouteIP4_t *rt // valid data
);
void CloseRouteScanIP4
(
RouteIP4_t *rt // valid data
);
///////////////////////////////////////////////////////////////////////////////
bool FindGatewayIP4
(
// returns TRUE if gateway found
RouteIP4_t *rt, // valid data, will be initialized
u32 ip4 // search gateway for this address (network byte order)
);
u32 GetIP4ByInterface
( // return 0 or IP4 in network byte order
ccp iface // interface name. If NULL: Use default gateway
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// E N D ///////////////
///////////////////////////////////////////////////////////////////////////////
#endif // DCLIB_NETWORK_LINUX_H
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