1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
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* Generic HDLC support routines for Linux
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* Point-to-point protocol support
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*
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* Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/errno.h>
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#include <linux/if_arp.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/pkt_sched.h>
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#include <linux/inetdevice.h>
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#include <linux/lapb.h>
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#include <linux/rtnetlink.h>
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#include <linux/hdlc.h>
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static int ppp_open(struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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void *old_ioctl;
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int result;
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dev->priv = &hdlc->state.ppp.syncppp_ptr;
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hdlc->state.ppp.syncppp_ptr = &hdlc->state.ppp.pppdev;
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hdlc->state.ppp.pppdev.dev = dev;
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old_ioctl = dev->do_ioctl;
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hdlc->state.ppp.old_change_mtu = dev->change_mtu;
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sppp_attach(&hdlc->state.ppp.pppdev);
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/* sppp_attach nukes them. We don't need syncppp's ioctl */
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dev->do_ioctl = old_ioctl;
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hdlc->state.ppp.pppdev.sppp.pp_flags &= ~PP_CISCO;
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dev->type = ARPHRD_PPP;
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result = sppp_open(dev);
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if (result) {
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sppp_detach(dev);
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return result;
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}
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return 0;
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}
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static void ppp_close(struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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sppp_close(dev);
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sppp_detach(dev);
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dev->rebuild_header = NULL;
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dev->change_mtu = hdlc->state.ppp.old_change_mtu;
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dev->mtu = HDLC_MAX_MTU;
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dev->hard_header_len = 16;
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}
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static unsigned short ppp_type_trans(struct sk_buff *skb,
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struct net_device *dev)
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{
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return __constant_htons(ETH_P_WAN_PPP);
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}
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int hdlc_ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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int result;
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switch (ifr->ifr_settings.type) {
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case IF_GET_PROTO:
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ifr->ifr_settings.type = IF_PROTO_PPP;
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return 0; /* return protocol only, no settable parameters */
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case IF_PROTO_PPP:
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if(!capable(CAP_NET_ADMIN))
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return -EPERM;
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if(dev->flags & IFF_UP)
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return -EBUSY;
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/* no settable parameters */
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result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
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if (result)
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return result;
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hdlc_proto_detach(hdlc);
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memset(&hdlc->proto, 0, sizeof(hdlc->proto));
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hdlc->proto.open = ppp_open;
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hdlc->proto.close = ppp_close;
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hdlc->proto.type_trans = ppp_type_trans;
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hdlc->proto.id = IF_PROTO_PPP;
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dev->hard_start_xmit = hdlc->xmit;
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dev->hard_header = NULL;
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dev->type = ARPHRD_PPP;
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dev->addr_len = 0;
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return 0;
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}
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return -EINVAL;
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}
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