tools/: added network (TCP) I/O helper functions

- include/netio.h, lib/netio.c: network I/O helper functions
- lib/Makefile (OBJS): added netio.o

tools/include/netio.h

@@ -0,0 +1,34 @@
+/*
+ * include/netio.h - Helper functions for socket I/O
+ *
+ * Written 2011 by Werner Almesberger
+ * Copyright 2011 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#ifndef NETIO_H
+#define	NETIO_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+
+struct netio;
+
+extern int netio_verbose;
+
+int netio_getc(struct netio *dsc, uint8_t *res);
+ssize_t netio_read_until(struct netio *dsc, const char *end, void *buf,
+    size_t len, char *last);
+ssize_t netio_read(struct netio *dsc, void *buf, size_t len);
+int netio_write(struct netio *dsc, const void *data, size_t len);
+int netio_printf(struct netio *dsc, const char *fmt, ...);
+struct netio *netio_open(int s);
+void netio_close(struct netio *dsc);
+
+#endif /* !NETIO_H */