1 files changed, 46 insertions, 0 deletions
diff --git a/usr/klibc/inet/bindresvport.c b/usr/klibc/inet/bindresvport.c
new file mode 100644
index 0000000..e22c1c2
--- /dev/null
+++ b/usr/klibc/inet/bindresvport.c
@@ -0,0 +1,46 @@
+/*
+ * inet/bindresvport.c
+ */
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+
+#define START_PORT	768
+#define END_PORT	IPPORT_RESERVED
+#define NUM_PORTS	(END_PORT - START_PORT)
+
+int bindresvport(int sd, struct sockaddr_in *sin)
+{
+	struct sockaddr_in me;
+	static short port;
+	int ret = 0;
+	int i;
+
+	if (sin == NULL) {
+		memset(&me, 0, sizeof(me));
+		sin = &me;
+		sin->sin_family = AF_INET;
+	} else if (sin->sin_family != AF_INET) {
+		errno = EPFNOSUPPORT;
+		return -1;
+	}
+
+	if (port == 0)
+		port = START_PORT + (getpid() % NUM_PORTS);
+
+	for (i = 0; i < NUM_PORTS; i++, port++) {
+		if (port == END_PORT)
+			port = START_PORT;
+		sin->sin_port = htons(port);
+
+		ret = bind(sd, (struct sockaddr *)sin, sizeof(*sin));
+		if (ret != -1)
+			break;
+	}
+
+	return ret;
+}