1 files changed, 54 insertions, 0 deletions
diff --git a/usr/klibc/inet/inet_ntop.c b/usr/klibc/inet/inet_ntop.c
new file mode 100644
index 0000000..106fb45
--- /dev/null
+++ b/usr/klibc/inet/inet_ntop.c
@@ -0,0 +1,54 @@
+/*
+ * inet/inet_ntop.c
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/in6.h>
+
+const char *inet_ntop(int af, const void *cp, char *buf, size_t len)
+{
+	size_t xlen;
+
+	switch (af) {
+	case AF_INET:
+		{
+			const uint8_t *bp = (const uint8_t *)
+				&((const struct in_addr *)cp)->s_addr;
+
+			xlen = snprintf(buf, len, "%u.%u.%u.%u",
+					bp[0], bp[1], bp[2], bp[3]);
+		}
+		break;
+
+	case AF_INET6:
+		{
+			const struct in6_addr *s = (const struct in6_addr *)cp;
+
+			xlen = snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x",
+					ntohs(s->s6_addr16[0]),
+					ntohs(s->s6_addr16[1]),
+					ntohs(s->s6_addr16[2]),
+					ntohs(s->s6_addr16[3]),
+					ntohs(s->s6_addr16[4]),
+					ntohs(s->s6_addr16[5]),
+					ntohs(s->s6_addr16[6]),
+					ntohs(s->s6_addr16[7]));
+		}
+		break;
+
+	default:
+		errno = EAFNOSUPPORT;
+		return NULL;
+	}
+
+	if (xlen > len) {
+		errno = ENOSPC;
+		return NULL;
+	}
+
+	return buf;
+}