outline stuff from arpa/inet.h

1 files changed, 43 insertions, 0 deletions

diff --git a/src/arpa/inet/inet_pton.c b/src/arpa/inet/inet_pton.c
new file mode 100644
index 00000000..14e7219b
--- /dev/null
+++ b/src/arpa/inet/inet_pton.c
@@ -0,0 +1,43 @@
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdlib.h>
+
+int inet_pton(int af, const char *restrict src, void *restrict dst)
+{
+	if (af == AF_INET) {
+		in_addr_t *a = dst;
+		unsigned long parts[4] = { 0 };
+		size_t part = 0;
+
+		while (*src && part < sizeof(parts)) {
+			char *next = NULL;
+			parts[part] = strtoul(src, &next, 0);
+			if (parts[part] > 255) {
+				return 0;
+			}
+
+			if (*next == '.') {
+				part++;
+				src = next + 1;
+			} else {
+				src = next;
+			}
+
+		}
+
+		if (part != sizeof(parts) - 1) {
+			return 0;
+		}
+
+		*a =  htonl((parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]);
+		return 1;
+	}
+
+	if (af != AF_INET6) {
+		errno = EAFNOSUPPORT;
+		return -1;
+	}
+
+	/* do ipv6 conversion */
+	return 1;
+}