Fix for RUTX platform

root/package/utils/sysupgrade-helper/src/tools/ncb.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+int main (int argc, char *argv[])
+{
+	int s, len, o, port = 6666;
+	char buf[512];
+	struct sockaddr_in addr;
+	socklen_t addr_len = sizeof addr;
+
+	if (argc > 1)
+		port = atoi (argv[1]);
+
+	s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+	o = 1;
+	len = 4;
+	setsockopt (3, SOL_SOCKET, SO_REUSEADDR, &o, len);
+
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons (port);
+	addr.sin_addr.s_addr = INADDR_ANY;	/* receive broadcasts */
+
+	bind (s, (struct sockaddr *) &addr, sizeof addr);
+
+	for (;;) {
+		len = recvfrom (s, buf, sizeof buf, 0, (struct sockaddr *) &addr, &addr_len);
+		if (len < 0)
+			break;
+		if (write (1, buf, len) != len)
+			fprintf(stderr, "WARNING: serial characters dropped\n");
+	}
+
+	return 0;
+}