1 files changed, 115 insertions, 0 deletions

diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c
new file mode 100644
index 000000000000..7cd6195a2e46
--- /dev/null
+++ b/drivers/net/wan/hdlc_ppp.c
@@ -0,0 +1,115 @@
+/*
+ * Generic HDLC support routines for Linux
+ * Point-to-point protocol support
+ *
+ * Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/pkt_sched.h>
+#include <linux/inetdevice.h>
+#include <linux/lapb.h>
+#include <linux/rtnetlink.h>
+#include <linux/hdlc.h>
+
+
+static int ppp_open(struct net_device *dev)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        void *old_ioctl;
+        int result;
+
+        dev->priv = &hdlc->state.ppp.syncppp_ptr;
+        hdlc->state.ppp.syncppp_ptr = &hdlc->state.ppp.pppdev;
+        hdlc->state.ppp.pppdev.dev = dev;
+
+        old_ioctl = dev->do_ioctl;
+        hdlc->state.ppp.old_change_mtu = dev->change_mtu;
+        sppp_attach(&hdlc->state.ppp.pppdev);
+        /* sppp_attach nukes them. We don't need syncppp's ioctl */
+        dev->do_ioctl = old_ioctl;
+        hdlc->state.ppp.pppdev.sppp.pp_flags &= ~PP_CISCO;
+        dev->type = ARPHRD_PPP;
+        result = sppp_open(dev);
+        if (result) {
+                sppp_detach(dev);
+                return result;
+        }
+
+        return 0;
+}
+
+
+
+static void ppp_close(struct net_device *dev)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+
+        sppp_close(dev);
+        sppp_detach(dev);
+        dev->rebuild_header = NULL;
+        dev->change_mtu = hdlc->state.ppp.old_change_mtu;
+        dev->mtu = HDLC_MAX_MTU;
+        dev->hard_header_len = 16;
+}
+
+
+
+static unsigned short ppp_type_trans(struct sk_buff *skb,
+                                     struct net_device *dev)
+{
+        return __constant_htons(ETH_P_WAN_PPP);
+}
+
+
+
+int hdlc_ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        int result;
+
+        switch (ifr->ifr_settings.type) {
+        case IF_GET_PROTO:
+                ifr->ifr_settings.type = IF_PROTO_PPP;
+                return 0; /* return protocol only, no settable parameters */
+
+        case IF_PROTO_PPP:
+                if(!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+
+                if(dev->flags & IFF_UP)
+                        return -EBUSY;
+
+                /* no settable parameters */
+
+                result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
+                if (result)
+                        return result;
+
+                hdlc_proto_detach(hdlc);
+                memset(&hdlc->proto, 0, sizeof(hdlc->proto));
+
+                hdlc->proto.open = ppp_open;
+                hdlc->proto.close = ppp_close;
+                hdlc->proto.type_trans = ppp_type_trans;
+                hdlc->proto.id = IF_PROTO_PPP;
+                dev->hard_start_xmit = hdlc->xmit;
+                dev->hard_header = NULL;
+                dev->type = ARPHRD_PPP;
+                dev->addr_len = 0;
+                return 0;
+        }
+
+        return -EINVAL;
+}