diff options
author | Kevin P. Fleming <kpfleming@digium.com> | 2008-05-21 15:11:48 +0000 |
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committer | Kevin P. Fleming <kpfleming@digium.com> | 2008-05-21 15:11:48 +0000 |
commit | 802b567e6c7ba7803a950324cbed13f7d57944cb (patch) | |
tree | 6b90ca3119aaa2e4073d3b651ac965dea5d3430e /drivers/dahdi/datamods/hdlc_ppp.c | |
parent | ec5ce88e015b41c2f46f6c9b783339b945f9502a (diff) |
start copying kernel bits
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@4315 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Diffstat (limited to 'drivers/dahdi/datamods/hdlc_ppp.c')
-rw-r--r-- | drivers/dahdi/datamods/hdlc_ppp.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/dahdi/datamods/hdlc_ppp.c b/drivers/dahdi/datamods/hdlc_ppp.c new file mode 100644 index 0000000..b81263e --- /dev/null +++ b/drivers/dahdi/datamods/hdlc_ppp.c @@ -0,0 +1,114 @@ +/* + * 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 __be16 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; +} |