added inet_pton and inet_ntop

libctru/include/arpa/inet.h

@@ -31,6 +31,9 @@ extern "C" {
 	int       inet_aton(const char *cp, struct in_addr *inp);
 	char*     inet_ntoa(struct in_addr in);
 
+	const char *inet_ntop(int af, const void *restrict src, char *restrict dst, socklen_t size);
+	int        inet_pton(int af, const char *restrict src, void *restrict dst);
+
 #ifdef __cplusplus
 }
 #endif

libctru/source/services/soc/soc_inet_ntop.c

@@ -0,0 +1,28 @@
+#include "soc_common.h"
+#include <arpa/inet.h>
+#include <stdio.h>
+
+
+static const char *inet_ntop4(const void *restrict src, char *restrict dst, socklen_t size)
+{
+	const u8 * ip = src;
+	if(size < INET_ADDRSTRLEN)
+	{
+		errno = ENOSPC;
+		return NULL;
+	}
+	snprintf(dst,size,"%hhu.%hhu.%hhu.%hhu",ip[0], ip[1], ip[2], ip[3]);
+	return dst;
+}
+
+
+const char *inet_ntop(int af, const void *restrict src, char *restrict dst, socklen_t size)
+{
+	if(af == AF_INET)
+	{
+		return inet_ntop4(src,dst,size);
+	}
+	// only support IPv4
+	errno = EAFNOSUPPORT;
+	return NULL;
+}

libctru/source/services/soc/soc_inet_pton.c

@@ -0,0 +1,24 @@
+#include "soc_common.h"
+#include <arpa/inet.h>
+#include <stdio.h>
+
+
+static int inet_pton4(const char *restrict src, void *restrict dst)
+{
+	u8 ip[4];
+	if(sscanf(src,"%hhu.%hhu.%hhu.%hhu",&ip[0], &ip[1], &ip[2], &ip[3]) != 4) return 0;
+	*(u32*)dst = *(u32*)ip;
+	return 1;
+}
+
+
+int inet_pton(int af, const char *restrict src, void *restrict dst)
+{
+	if(af == AF_INET)
+	{
+		return inet_pton4(src,dst);
+	}
+	// only support IPv4
+	errno = EAFNOSUPPORT;
+	return -1;
+}