1 files changed, 141 insertions, 0 deletions
diff --git a/rfc1035/rfc1035an.c b/rfc1035/rfc1035an.c
new file mode 100644
index 0000000..7459530
--- /dev/null
+++ b/rfc1035/rfc1035an.c
@@ -0,0 +1,141 @@
+/*
+** Copyright 1998 - 2000 Double Precision, Inc.
+** See COPYING for distribution information.
+*/
+#include	"config.h"
+#include	"rfc1035.h"
+#include	<sys/types.h>
+#include	<sys/socket.h>
+#include	<arpa/inet.h>
+#include	<errno.h>
+#include	<string.h>
+
+
+void rfc1035_ntoa_ipv4(const struct in_addr *in, char *buf)
+{
+union	{
+	unsigned char addr[4];
+	RFC1035_UINT32 n;
+	} u;
+
+int	i;
+char	*p;
+char	pbuf[4];
+
+	u.n=in->s_addr;
+	for (i=0; i<4; i++)
+	{
+		if (i)	*buf++='.';
+		p=pbuf+3;
+		*p=0;
+		do
+		{
+			*--p = '0' + (u.addr[i] % 10);
+		} while ( (u.addr[i] /= 10) != 0);
+		while (*p)
+			*buf++ = *p++;
+	}
+	*buf=0;
+}
+
+void rfc1035_ntoa(const RFC1035_ADDR *in, char *buf)
+{
+#if	RFC1035_IPV6
+	inet_ntop(AF_INET6, in, buf, RFC1035_MAXNAMESIZE+1);
+#else
+	rfc1035_ntoa_ipv4(in, buf);
+#endif
+}
+
+static RFC1035_UINT32 doaton(const char *p, int *err)
+{
+RFC1035_UINT32 octets[4];
+int	i;
+int	base;
+
+	*err=1;
+	for (i=0; i<4; i++)
+	{
+		if (i > 0)
+		{
+			if (*p == '\0')	break;
+			if (*p != '.')	return ( -1 );
+			++p;
+		}
+		if (*p < '0' || *p > '9')	return (-1);
+		octets[i]=0;
+		base=10;
+		if (*p == '0')	base=8;
+
+		while (*p >= '0' && *p < '0'+base)
+			octets[i] = octets[i] * base + (*p++ - '0');
+	}
+	if (*p)	return ( -1 );
+	*err=0;
+	if (i == 1)	return (octets[0]);
+	*err=1;
+	if (octets[0] > 255)	return ( -1 );
+	octets[0] <<= 24;
+
+	if (i == 2)
+	{
+		if (octets[1] > 0x00FFFFFF)	return ( -1 );
+		*err=0;
+		return (octets[0] | octets[1]);
+	}
+
+	if (octets[1] > 255)	return ( -1 );
+	octets[1] <<= 16;
+	if (i == 3)
+	{
+		if (octets[2] > 0x0000FFFF)	return ( -1 );
+		*err=0;
+		return (octets[0] | octets[1] | octets[2]);
+	}
+	if (octets[2] > 255 || octets[3] > 255)	return ( -1 );
+	*err=0;
+	return (octets[0] | octets[1] | (octets[2] << 8) | octets[3]);
+}
+
+int rfc1035_aton_ipv4(const char *p, struct in_addr *in4)
+{
+int	dummy;
+RFC1035_UINT32 n=doaton(p, &dummy);
+union	{
+	unsigned char addr[4];
+	struct in_addr n;
+	} u;
+
+	u.addr[3]=n;
+	u.addr[2]=n >> 8;
+	u.addr[1]=n >> 16;
+	u.addr[0]=n >> 24;
+
+	if (dummy)	errno=EINVAL;
+	*in4=u.n;
+	return (dummy);
+}
+
+#if	RFC1035_IPV6
+
+int rfc1035_aton(const char *p, RFC1035_ADDR *in6)
+{
+struct in_addr	in4;
+
+	if (rfc1035_aton_ipv4(p, &in4) == 0)
+	{
+		rfc1035_ipv4to6(in6, &in4);
+		return (0);
+	}
+	if (inet_pton(AF_INET6, p, in6) <= 0)
+		return (-1);
+	return (0);
+}
+
+#else
+
+int rfc1035_aton(const char *p, RFC1035_ADDR *in4)
+{
+	return (rfc1035_aton_ipv4(p, in4));
+}
+#endif