Update from NeXT-ppp-2.2-0.4.6

[ppp.git] / NeXT / netbuf.h

diff --git a/NeXT/netbuf.h b/NeXT/netbuf.h
new file mode 100644 (file)
index 0000000..578ac8f
--- /dev/null
+++ b/NeXT/netbuf.h
@@ -0,0 +1,41 @@
+/* 
+ * Copyright (C) 1990 by NeXT, Inc., All Rights Reserved
+ *
+ */
+
+/* 
+ * Network Buffer API (for kernel use only)
+ *
+ * HISTORY
+ * 09-Apr-90  Bradley Taylor (btaylor) at NeXT, Inc.
+ *     Created. 
+ */
+#ifndef _NETBUF_
+#define _NETBUF_
+
+/*
+ * We know only that the first entry in the structure is a
+ * pointer that isn't used while the netbuf is allocated.
+ * (that is, until an nb_free() or an inet_queue() of course!)
+ */
+typedef struct netbuf { struct netbuf *m_nextpkt; } *netbuf_t;
+
+#ifdef KERNEL
+
+extern char *nb_map(netbuf_t nb);
+extern netbuf_t nb_alloc(unsigned size);
+extern netbuf_t nb_alloc_wrapper(void *data, unsigned size,
+                                void freefunc(void *), void *freefunc_arg);
+
+extern void nb_free(netbuf_t nb);
+extern void nb_free_wrapper(netbuf_t nb);
+extern unsigned nb_size(netbuf_t nb);
+extern int nb_read(netbuf_t nb, unsigned offset, unsigned size, void *target);
+extern int nb_write(netbuf_t nb, unsigned offset, unsigned size, void *source);
+extern int nb_shrink_top(netbuf_t nb, unsigned size);
+extern int nb_grow_top(netbuf_t nb, unsigned size);
+extern int nb_shrink_bot(netbuf_t nb, unsigned size);
+extern int nb_grow_bot(netbuf_t nb, unsigned size);
+
+#endif /* KERNEL */
+#endif /* _NETBUF_ */