patch-2.3.99-pre7 linux/drivers/net/pppox.c

• Lines: 173
• Date: Mon May 8 22:21:58 2000
• Orig file: v2.3.99-pre6/linux/drivers/net/pppox.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre6/linux/drivers/net/pppox.c linux/drivers/net/pppox.c
@@ -0,0 +1,172 @@
+/** -*- linux-c -*- ***********************************************************
+ * Linux PPP over X/Ethernet (PPPoX/PPPoE) Sockets
+ *
+ * PPPoX --- Generic PPP encapsulation socket family
+ * PPPoE --- PPP over Ethernet (RFC 2516)
+ *
+ *
+ * Version:	0.5.0
+ *
+ * Author:	Michal Ostrowski <mostrows@styx.uwaterloo.ca>
+ *
+ * License:
+ *		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.
+ *
+ */
+
+#include <linux/string.h>
+#include <linux/module.h>
+
+#include <asm/uaccess.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+
+#include <linux/netdevice.h>
+#include <linux/net.h>
+#include <linux/init.h>
+#include <linux/if_pppox.h>
+#include <net/sock.h>
+#include <linux/ppp_defs.h>
+#include <linux/if_ppp.h>
+#include <linux/ppp_channel.h>
+
+static struct pppox_proto *proto[PX_MAX_PROTO+1] = { NULL, };
+
+int register_pppox_proto(int proto_num, struct pppox_proto *pp)
+{
+	if (proto_num < 0 || proto_num > PX_MAX_PROTO) {
+		return -EINVAL;
+	}
+
+	if (proto[proto_num])
+		return -EALREADY;
+
+	MOD_INC_USE_COUNT;
+
+	proto[proto_num] = pp;
+	return 0;
+}
+
+void unregister_pppox_proto(int proto_num)
+{
+	if (proto_num >= 0 && proto_num <= PX_MAX_PROTO) {
+	    proto[proto_num] = NULL;
+	    MOD_DEC_USE_COUNT;
+	}
+}
+
+void pppox_unbind_sock(struct sock *sk)
+{
+	/* Clear connection to ppp device, if attached. */
+
+	if (sk->state & PPPOX_BOUND) {
+		ppp_unregister_channel(&sk->protinfo.pppox->chan);
+		sk->state &= ~PPPOX_BOUND;
+	}
+}
+
+EXPORT_SYMBOL(register_pppox_proto);
+EXPORT_SYMBOL(unregister_pppox_proto);
+EXPORT_SYMBOL(pppox_unbind_sock);
+
+int pppox_ioctl(struct socket* sock, unsigned int cmd,
+		unsigned long arg)
+{
+	struct sock *sk = sock->sk;
+	struct pppox_opt *po;
+	int err = 0;
+
+	po = sk->protinfo.pppox;
+
+	lock_sock(sk);
+
+	switch (cmd) {
+	case PPPIOCGCHAN:{
+		int index;
+		err = -ENOTCONN;
+		if (!(sk->state & PPPOX_CONNECTED))
+			break;
+
+		err = -EINVAL;
+		index = ppp_channel_index(&po->chan);
+		if (put_user(index , (int *) arg))
+			break;
+
+		err = 0;
+		sk->state |= PPPOX_BOUND;
+		break;
+	}
+	default:
+		if (proto[sk->protocol]->ioctl)
+			err = (*proto[sk->protocol]->ioctl)(sock, cmd, arg);
+
+		break;
+	};
+
+	release_sock(sk);
+	return err;
+}
+
+
+int pppox_create(struct socket *sock, int protocol)
+{
+	int err = 0;
+
+	if (protocol < 0 || protocol > PX_MAX_PROTO)
+	    return -EPROTOTYPE;
+
+	if (proto[protocol] == NULL)
+	    return -EPROTONOSUPPORT;
+
+	err = (*proto[protocol]->create)(sock);
+
+	if (err == 0) {
+		/* We get to set the ioctl handler. */
+		/* For everything else, pppox is just a shell. */
+		sock->ops->ioctl = pppox_ioctl;
+	}
+
+	return err;
+}
+
+struct net_proto_family pppox_proto_family = {
+	PF_PPPOX,
+	pppox_create
+};
+
+#ifdef MODULE
+int init_module(void)
+#else
+void __init pppox_proto_init(struct net_proto *pro)
+#endif
+{
+	int err = 0;
+
+	err = sock_register(&pppox_proto_family);
+
+	if (err == 0)
+		printk(KERN_INFO "Registered PPPoX v0.5\n");
+
+#ifdef CONFIG_PPPOE
+	pppoe_init();
+#endif
+
+	return err;
+}
+
+#ifdef MODULE
+
+MODULE_PARM(debug, "i");
+
+void cleanup_module(void)
+{
+	sock_unregister(PF_PPPOX);
+}
+
+#endif