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/* posix */
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* bsd extensions */
#include <sys/uio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
char*
inet_ntop(int af, void *src, char *dst, int size)
{
static unsigned char v4prefix[12] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff, };
unsigned char *p;
char *t;
int i;
if(af == AF_INET){
p = (unsigned char*)&(((struct in_addr*)src)->s_addr);
Dot4:
if(size < INET_ADDRSTRLEN){
errno = ENOSPC;
return 0;
}
snprintf(dst, size, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
return dst;
}
if(af != AF_INET6){
errno = EAFNOSUPPORT;
return 0;
}
p = (unsigned char*)((struct in6_addr*)src)->s6_addr;
if(memcmp(p, v4prefix, 12) == 0){
p += 12;
goto Dot4;
}
if(size < INET6_ADDRSTRLEN){
errno = ENOSPC;
return 0;
}
t = dst;
for(i=0; i<16; i += 2){
unsigned int w;
if(i > 0)
*t++ = ':';
w = p[i]<<8 | p[i+1];
sprintf(t, "%x", w);
t += strlen(t);
}
return dst;
}
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