in.h

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#ifndef _GPXE_IN_H
#define _GPXE_IN_H

FILE_LICENCE ( GPL2_OR_LATER );

#include <stdint.h>
#include <gpxe/socket.h>

/* Protocol numbers */

#define IP_ICMP         1
#define IP_TCP          6
#define IP_UDP          17
#define IP_ICMP6        58

/* IP address constants */

#define INADDR_NONE 0xffffffff

#define INADDR_BROADCAST 0xffffffff

#define IN_CLASSA(addr)         ( ( (addr) & 0x80000000 ) == 0x00000000 )
#define IN_CLASSA_NET           0xff000000
#define IN_CLASSB(addr)         ( ( (addr) & 0xc0000000 ) == 0x80000000 )
#define IN_CLASSB_NET           0xffff0000
#define IN_CLASSC(addr)         ( ( (addr) & 0xe0000000 ) == 0xc0000000 )
#define IN_CLASSC_NET           0xffffff00
#define IN_MULTICAST(addr)      ( ( (addr) & 0xf0000000 ) == 0xe0000000 )

/**
 * IP address structure
 */
struct in_addr {
        uint32_t        s_addr;
};

typedef struct in_addr in_addr;

/**
 * IP6 address structure
 */
struct in6_addr {
        union {
                uint8_t u6_addr8[16];
                uint16_t u6_addr16[8];
                uint32_t u6_addr32[4];
        } in6_u;
#define s6_addr         in6_u.u6_addr8
#define s6_addr16       in6_u.u6_addr16
#define s6_addr32       in6_u.u6_addr32
};

/**
 * IPv4 socket address
 */
struct sockaddr_in {
        /** Socket address family (part of struct @c sockaddr)
         *
         * Always set to @c AF_INET for IPv4 addresses
         */
        sa_family_t sin_family;
        /** TCP/IP port (part of struct @c sockaddr_tcpip) */
        uint16_t sin_port;
        /** IPv4 address */
        struct in_addr sin_addr;
        /** Padding
         *
         * This ensures that a struct @c sockaddr_tcpip is large
         * enough to hold a socket address for any TCP/IP address
         * family.
         */
        char pad[ sizeof ( struct sockaddr ) - sizeof ( sa_family_t )
                                             - sizeof ( uint16_t )
                                             - sizeof ( struct in_addr ) ];
} __attribute__ (( may_alias ));

/**
 * IPv6 socket address
 */
struct sockaddr_in6 {
        /** Socket address family (part of struct @c sockaddr)
         *
         * Always set to @c AF_INET6 for IPv6 addresses
         */
        sa_family_t sin_family;
        /** TCP/IP port (part of struct @c sockaddr_tcpip) */
        uint16_t        sin_port;
        uint32_t        sin6_flowinfo;  /* Flow number */
        struct in6_addr sin6_addr;      /* 128-bit destination address */
        uint32_t        sin6_scope_id;  /* Scope ID */
} __attribute__ (( may_alias ));

extern int inet_aton ( const char *cp, struct in_addr *inp );
extern char * inet_ntoa ( struct in_addr in );

/* Adding the following for IP6 support
 *

extern int inet6_aton ( const char *cp, struct in6_addr *inp );
extern char * inet6_ntoa ( struct in_addr in );

 */

#endif  /* _GPXE_IN_H */