patch-2.3.13 linux/include/linux/ppp_channel.h

• Lines: 63
• Date: Fri Aug 6 10:44:11 1999
• Orig file: v2.3.12/linux/include/linux/ppp_channel.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.12/linux/include/linux/ppp_channel.h linux/include/linux/ppp_channel.h
@@ -0,0 +1,62 @@
+/*
+ * Definitions for the interface between the generic PPP code
+ * and a PPP channel.
+ *
+ * A PPP channel provides a way for the generic PPP code to send
+ * and receive packets over some sort of communications medium.
+ * Packets are stored in sk_buffs and have the 2-byte PPP protocol
+ * number at the start, but not the address and control bytes.
+ *
+ * Copyright 1999 Paul Mackerras.
+ *
+ *  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.
+ *
+ * ==FILEVERSION 990717==
+ */
+
+/* $Id$ */
+
+#include <linux/list.h>
+#include <linux/skbuff.h>
+
+struct ppp_channel;
+
+struct ppp_channel_ops {
+	/* Send a packet (or multilink fragment) on this channel.
+	   Returns 1 if it was accepted, 0 if not. */
+	int	(*start_xmit)(struct ppp_channel *, struct sk_buff *);
+
+};
+
+struct ppp_channel {
+	void		*private;	/* channel private data */
+	struct ppp_channel_ops *ops;	/* operations for this channel */
+	int		xmit_qlen;	/* length of transmit queue (bytes) */
+	int		speed;		/* transfer rate (bytes/second) */
+	int		latency;	/* overhead time in milliseconds */
+	struct list_head list;		/* link in list of channels per unit */
+	void		*ppp;		/* opaque to channel */
+};
+
+#ifdef __KERNEL__
+/* Called by the channel when it can send some more data. */
+extern void ppp_output_wakeup(struct ppp_channel *);
+
+/* Called by the channel to process a received PPP packet.
+   The packet should have just the 2-byte PPP protocol header. */
+extern void ppp_input(struct ppp_channel *, struct sk_buff *);
+
+/* Called by the channel when an input error occurs, indicating
+   that we may have missed a packet. */
+extern void ppp_input_error(struct ppp_channel *, int code);
+
+/* Attach a channel to a given PPP unit. */
+extern int ppp_register_channel(struct ppp_channel *, int unit);
+
+/* Detach a channel from its PPP unit (e.g. on hangup). */
+extern void ppp_unregister_channel(struct ppp_channel *);
+
+#endif /* __KERNEL__ */