metalsvm/newlib/net/inet.h

/*
 * Copyright (c) 2011, Stefan Lankes, Chair for Operating Systems,
 *                                    RWTH Aachen University
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the Chair for Operating Systems,
 *    RWTH Aachen University.
 * 4. Neither the name of the Chair for Operating Systems, RWTH Aachen University 
 *    nor the names of its contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * The kernel of MetalSVM uses LwIP as lightweight TCP/IP stack.
 * This header defines only a small wrapper to use LwIP functions
 * from user space. 
 */

#ifndef __ARPA_INET_H__
#define __ARPA_INET_H__

#include <stddef.h>
#include <sys/types.h>

#ifdef __cplusplus
{
#endif

/*
 * This is the aligned version of ip_addr_t,
 *  used as local variable, on the stack, etc.
 */
struct ip_addr {
	uint32_t addr;
};

#ifndef LITTLE_ENDIAN
// Convert an uint16_t from host- to network byte order.
static inline uint16_t htons(uint16_t n)
{
	return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
}

// Convert an uint16_t from network- to host byte order.
static inline uint16_t ntohs(uint16_t n)
{
	return htons(n);
}

// Convert an uint32_t from host- to network byte order.
static inline uint32_t htonl(uint32_t n)
{
	return ((n & 0xff) << 24) | ((n & 0xff00) << 8) | ((n & 0xff0000UL) >> 8) |
			((n & 0xff000000UL) >> 24);
}

// Convert an uint32_t from network- to host byte order.
static  inline uint32_t ntohl(uint32_t n)
{
	return htonl(n);
}
#else
#error currently not supported!!!
#endif


/** ip_addr_t uses a struct for convenience only, so that the same defines can
 * operate both on ip_addr_t as well as on ip_addr_p_t. */
typedef struct ip_addr ip_addr_t;
//typedef struct ip_addr_packed ip_addr_p_t;

uint32_t ipaddr_addr(const char *cp);
int ipaddr_aton(const char *cp, ip_addr_t *addr);
/** returns ptr to static buffer; not reentrant! */
char *ipaddr_ntoa(const ip_addr_t *addr);
char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen);

/* directly map this to the lwip internal functions */
#define inet_addr(cp)         ipaddr_addr(cp)
#define inet_aton(cp, addr)   ipaddr_aton(cp, (ip_addr_t*)addr)
#define inet_ntoa(addr)       ipaddr_ntoa((ip_addr_t*)&(addr))
#define inet_ntoa_r(addr, buf, buflen) ipaddr_ntoa_r((ip_addr_t*)&(addr), buf, buflen)

#ifdef __cplusplus
}
#endif

#endif /* __ARPA_INET_H__ */