[NET]: __be'ify *_type_trans()
[linux-2.6.git] / drivers / net / wan / hdlc_raw.c
1 /*
2  * Generic HDLC support routines for Linux
3  * HDLC support
4  *
5  * Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of version 2 of the GNU General Public License
9  * as published by the Free Software Foundation.
10  */
11
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/poll.h>
16 #include <linux/errno.h>
17 #include <linux/if_arp.h>
18 #include <linux/init.h>
19 #include <linux/skbuff.h>
20 #include <linux/pkt_sched.h>
21 #include <linux/inetdevice.h>
22 #include <linux/lapb.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/hdlc.h>
25
26
27 static __be16 raw_type_trans(struct sk_buff *skb, struct net_device *dev)
28 {
29         return __constant_htons(ETH_P_IP);
30 }
31
32
33
34 int hdlc_raw_ioctl(struct net_device *dev, struct ifreq *ifr)
35 {
36         raw_hdlc_proto __user *raw_s = ifr->ifr_settings.ifs_ifsu.raw_hdlc;
37         const size_t size = sizeof(raw_hdlc_proto);
38         raw_hdlc_proto new_settings;
39         hdlc_device *hdlc = dev_to_hdlc(dev);
40         int result;
41
42         switch (ifr->ifr_settings.type) {
43         case IF_GET_PROTO:
44                 ifr->ifr_settings.type = IF_PROTO_HDLC;
45                 if (ifr->ifr_settings.size < size) {
46                         ifr->ifr_settings.size = size; /* data size wanted */
47                         return -ENOBUFS;
48                 }
49                 if (copy_to_user(raw_s, &hdlc->state.raw_hdlc.settings, size))
50                         return -EFAULT;
51                 return 0;
52
53         case IF_PROTO_HDLC:
54                 if (!capable(CAP_NET_ADMIN))
55                         return -EPERM;
56
57                 if (dev->flags & IFF_UP)
58                         return -EBUSY;
59
60                 if (copy_from_user(&new_settings, raw_s, size))
61                         return -EFAULT;
62
63                 if (new_settings.encoding == ENCODING_DEFAULT)
64                         new_settings.encoding = ENCODING_NRZ;
65
66                 if (new_settings.parity == PARITY_DEFAULT)
67                         new_settings.parity = PARITY_CRC16_PR1_CCITT;
68
69                 result = hdlc->attach(dev, new_settings.encoding,
70                                       new_settings.parity);
71                 if (result)
72                         return result;
73
74                 hdlc_proto_detach(hdlc);
75                 memcpy(&hdlc->state.raw_hdlc.settings, &new_settings, size);
76                 memset(&hdlc->proto, 0, sizeof(hdlc->proto));
77
78                 hdlc->proto.type_trans = raw_type_trans;
79                 hdlc->proto.id = IF_PROTO_HDLC;
80                 dev->hard_start_xmit = hdlc->xmit;
81                 dev->hard_header = NULL;
82                 dev->type = ARPHRD_RAWHDLC;
83                 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
84                 dev->addr_len = 0;
85                 return 0;
86         }
87
88         return -EINVAL;
89 }