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#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include "dietfeatures.h"
static unsigned int scan_ip6(const char *s,char ip[16])
{
unsigned int i;
unsigned int len=0;
unsigned long u;
char suffix[16];
unsigned int prefixlen=0;
unsigned int suffixlen=0;
for (i=0; i<16; i++) ip[i]=0;
for (;;) {
if (*s == ':') {
len++;
if (s[1] == ':') { /* Found "::", skip to part 2 */
s+=2;
len++;
break;
}
s++;
}
{
char *tmp;
u=strtoul(s,&tmp,16);
i=tmp-s;
}
if (!i) return 0;
if (prefixlen==12 && s[i]=='.') {
/* the last 4 bytes may be written as IPv4 address */
if (inet_aton(s,(struct in_addr*)(ip+12)))
return i+len;
else
return 0;
}
ip[prefixlen++] = (u >> 8);
ip[prefixlen++] = (u & 255);
s += i; len += i;
if (prefixlen==16)
return len;
}
/* part 2, after "::" */
for (;;) {
if (*s == ':') {
if (suffixlen==0)
break;
s++;
len++;
} else if (suffixlen!=0)
break;
{
char *tmp;
u=strtol(s,&tmp,16);
i=tmp-s;
}
if (!i) {
if (*s) len--;
break;
}
if (suffixlen+prefixlen<=12 && s[i]=='.') {
if (inet_aton(s,(struct in_addr*)(suffix+suffixlen))) {
suffixlen+=4;
len+=strlen(s);
break;
} else
prefixlen=12-suffixlen; /* make end-of-loop test true */
}
suffix[suffixlen++] = (u >> 8);
suffix[suffixlen++] = (u & 255);
s += i; len += i;
if (prefixlen+suffixlen==16)
break;
}
for (i=0; i<suffixlen; i++)
ip[16-suffixlen+i] = suffix[i];
return len;
}
int inet_pton(int AF, const char *CP, void *BUF) {
int len;
if (AF==AF_INET) {
if (!inet_aton(CP,(struct in_addr*)BUF))
return 0;
} else if (AF==AF_INET6) {
if (CP[len=scan_ip6(CP,BUF)])
if (CP[len]!='%') /* allow "fe80::220:e0ff:fe69:ad92%eth0" */
return 0;
} else {
errno=EAFNOSUPPORT;
return -1;
}
return 1;
}
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