diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/wan/hdlc_raw.c | |
download | kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
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!
Diffstat (limited to 'drivers/net/wan/hdlc_raw.c')
-rw-r--r-- | drivers/net/wan/hdlc_raw.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/net/wan/hdlc_raw.c b/drivers/net/wan/hdlc_raw.c new file mode 100644 index 0000000..c41fb70 --- /dev/null +++ b/drivers/net/wan/hdlc_raw.c @@ -0,0 +1,90 @@ +/* + * Generic HDLC support routines for Linux + * HDLC 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 unsigned short raw_type_trans(struct sk_buff *skb, + struct net_device *dev) +{ + return __constant_htons(ETH_P_IP); +} + + + +int hdlc_raw_ioctl(struct net_device *dev, struct ifreq *ifr) +{ + raw_hdlc_proto __user *raw_s = ifr->ifr_settings.ifs_ifsu.raw_hdlc; + const size_t size = sizeof(raw_hdlc_proto); + raw_hdlc_proto new_settings; + hdlc_device *hdlc = dev_to_hdlc(dev); + int result; + + switch (ifr->ifr_settings.type) { + case IF_GET_PROTO: + ifr->ifr_settings.type = IF_PROTO_HDLC; + if (ifr->ifr_settings.size < size) { + ifr->ifr_settings.size = size; /* data size wanted */ + return -ENOBUFS; + } + if (copy_to_user(raw_s, &hdlc->state.raw_hdlc.settings, size)) + return -EFAULT; + return 0; + + case IF_PROTO_HDLC: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (dev->flags & IFF_UP) + return -EBUSY; + + if (copy_from_user(&new_settings, raw_s, size)) + return -EFAULT; + + if (new_settings.encoding == ENCODING_DEFAULT) + new_settings.encoding = ENCODING_NRZ; + + if (new_settings.parity == PARITY_DEFAULT) + new_settings.parity = PARITY_CRC16_PR1_CCITT; + + result = hdlc->attach(dev, new_settings.encoding, + new_settings.parity); + if (result) + return result; + + hdlc_proto_detach(hdlc); + memcpy(&hdlc->state.raw_hdlc.settings, &new_settings, size); + memset(&hdlc->proto, 0, sizeof(hdlc->proto)); + + hdlc->proto.type_trans = raw_type_trans; + hdlc->proto.id = IF_PROTO_HDLC; + dev->hard_start_xmit = hdlc->xmit; + dev->hard_header = NULL; + dev->type = ARPHRD_RAWHDLC; + dev->flags = IFF_POINTOPOINT | IFF_NOARP; + dev->addr_len = 0; + return 0; + } + + return -EINVAL; +} |