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      1 /*
      2  * Copyright (c) 2009 The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  * 3. All advertising materials mentioning features or use of this software
     13  *    must display the following acknowledgement:
     14  *	This product includes software developed by the University of
     15  *	California, Berkeley and its contributors.
     16  * 4. Neither the name of the University nor the names of its contributors
     17  *    may be used to endorse or promote products derived from this software
     18  *    without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  */
     32 #ifndef _SLIRP_HELPER_H
     33 #define _SLIRP_HELPER_H
     34 
     35 #ifdef _WIN32
     36 #  include <winsock2.h>  /* for ntohl */
     37 #endif
     38 
     39 typedef union {
     40     u_int32_t   addr;
     41     u_int8_t    data[4];
     42 } ipaddr_t;
     43 
     44 /* return ip address in network order */
     45 static __inline__ uint32_t
     46 ip_getn( ipaddr_t  ip )
     47 {
     48     return ip.addr;
     49 }
     50 
     51 /* return ip address in host order */
     52 static __inline__ uint32_t
     53 ip_geth( ipaddr_t  ip )
     54 {
     55     return ntohl(ip.addr);
     56 }
     57 
     58 /* set ip address in network order */
     59 static __inline__ ipaddr_t
     60 ip_setn( uint32_t  val )
     61 {
     62     ipaddr_t  ip;
     63     ip.addr = val;
     64     return ip;
     65 }
     66 
     67 /* set ip address in host order */
     68 static __inline__ ipaddr_t
     69 ip_seth( uint32_t  val )
     70 {
     71     ipaddr_t  ip;
     72     ip.addr = htonl(val);
     73     return ip;
     74 }
     75 
     76 static __inline__ ipaddr_t
     77 ip_read( const void*  buf )
     78 {
     79     ipaddr_t  ip;
     80     memcpy(ip.data, buf, 4);
     81     return ip;
     82 }
     83 
     84 static __inline__ void
     85 ip_write( ipaddr_t  ip, void*  buf )
     86 {
     87     memcpy(buf, ip.data, 4);
     88 }
     89 
     90 static __inline__ uint32_t
     91 ip_read32h( const void* buf )
     92 {
     93     ipaddr_t  addr = ip_read(buf);
     94     return ip_geth(addr);
     95 }
     96 
     97 static __inline__ void
     98 ip_write32h( uint32_t  ip, void*  buf )
     99 {
    100     ipaddr_t  addr = ip_seth(ip);
    101     ip_write(addr, buf);
    102 }
    103 
    104 static __inline__ int
    105 ip_equal( ipaddr_t  ip1, ipaddr_t  ip2 )
    106 {
    107     return ip1.addr == ip2.addr;
    108 }
    109 
    110 typedef union {
    111     u_int16_t  port;
    112     u_int8_t   data[2];
    113 } port_t;
    114 
    115 static __inline__ uint16_t
    116 port_getn( port_t   p )
    117 {
    118     return p.port;
    119 }
    120 
    121 static __inline__ uint16_t
    122 port_geth( port_t  p )
    123 {
    124     return ntohs(p.port);
    125 }
    126 
    127 static __inline__ port_t
    128 port_setn( uint16_t  val )
    129 {
    130     port_t  p;
    131     p.port = val;
    132     return p;
    133 }
    134 
    135 static __inline__ port_t
    136 port_seth( uint16_t  val )
    137 {
    138     port_t  p;
    139     p.port = htons(val);
    140     return p;
    141 }
    142 
    143 #endif /* _SLIRP_HELPER_H */
    144