Function dnsauth

src/auth.c:758–791

}

int dnsauth(struct clientparam * param){
        char buf[128];
	char addr[16];
	char dig[]="0123456789abcdef";

	unsigned u;
	int i;

	if(*SAFAMILY(&param->sincr)!=AF_INET){
		char *s = buf;
		for(i=15; i>=0; i--){
			unsigned char c=((unsigned char *)SAADDR(&param->sincr))[i];
			*s++ = dig[(c&0xf)];
			*s++ = '.';
			*s++ = dig[(c>>4)];
			*s++ = '.';
		}
		sprintf(s, "ip6.arpa");
	}
	else {
		u = ntohl(*(unsigned long *)SAADDR(&param->sincr));

		sprintf(buf, "%u.%u.%u.%u.in-addr.arpa", 
			((u&0x000000FF)),
			((u&0x0000FF00)>>8),
			((u&0x00FF0000)>>16),
			((u&0xFF000000)>>24));
	
	}
	if(!udpresolve(*SAFAMILY(&param->sincr), (unsigned char *)buf, (unsigned char *)addr, NULL, param, 1)) return 6;
	if(!memcmp(SAADDR(&param->sincr), addr, SAADDRLEN(&param->sincr))) return 6;

	return param->username? 0:4;
}

int strongauth(struct clientparam * param){
	struct passwords * pwl;