[NET]: __be'ify *_type_trans()
[linux-2.6.git] / drivers / net / wan / hdlc_ppp.c
1 /*
2  * Generic HDLC support routines for Linux
3  * Point-to-point protocol 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 int ppp_open(struct net_device *dev)
28 {
29         hdlc_device *hdlc = dev_to_hdlc(dev);
30         void *old_ioctl;
31         int result;
32
33         dev->priv = &hdlc->state.ppp.syncppp_ptr;
34         hdlc->state.ppp.syncppp_ptr = &hdlc->state.ppp.pppdev;
35         hdlc->state.ppp.pppdev.dev = dev;
36
37         old_ioctl = dev->do_ioctl;
38         hdlc->state.ppp.old_change_mtu = dev->change_mtu;
39         sppp_attach(&hdlc->state.ppp.pppdev);
40         /* sppp_attach nukes them. We don't need syncppp's ioctl */
41         dev->do_ioctl = old_ioctl;
42         hdlc->state.ppp.pppdev.sppp.pp_flags &= ~PP_CISCO;
43         dev->type = ARPHRD_PPP;
44         result = sppp_open(dev);
45         if (result) {
46                 sppp_detach(dev);
47                 return result;
48         }
49
50         return 0;
51 }
52
53
54
55 static void ppp_close(struct net_device *dev)
56 {
57         hdlc_device *hdlc = dev_to_hdlc(dev);
58
59         sppp_close(dev);
60         sppp_detach(dev);
61         dev->rebuild_header = NULL;
62         dev->change_mtu = hdlc->state.ppp.old_change_mtu;
63         dev->mtu = HDLC_MAX_MTU;
64         dev->hard_header_len = 16;
65 }
66
67
68
69 static __be16 ppp_type_trans(struct sk_buff *skb, struct net_device *dev)
70 {
71         return __constant_htons(ETH_P_WAN_PPP);
72 }
73
74
75
76 int hdlc_ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
77 {
78         hdlc_device *hdlc = dev_to_hdlc(dev);
79         int result;
80
81         switch (ifr->ifr_settings.type) {
82         case IF_GET_PROTO:
83                 ifr->ifr_settings.type = IF_PROTO_PPP;
84                 return 0; /* return protocol only, no settable parameters */
85
86         case IF_PROTO_PPP:
87                 if(!capable(CAP_NET_ADMIN))
88                         return -EPERM;
89
90                 if(dev->flags & IFF_UP)
91                         return -EBUSY;
92
93                 /* no settable parameters */
94
95                 result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
96                 if (result)
97                         return result;
98
99                 hdlc_proto_detach(hdlc);
100                 memset(&hdlc->proto, 0, sizeof(hdlc->proto));
101
102                 hdlc->proto.open = ppp_open;
103                 hdlc->proto.close = ppp_close;
104                 hdlc->proto.type_trans = ppp_type_trans;
105                 hdlc->proto.id = IF_PROTO_PPP;
106                 dev->hard_start_xmit = hdlc->xmit;
107                 dev->hard_header = NULL;
108                 dev->type = ARPHRD_PPP;
109                 dev->addr_len = 0;
110                 return 0;
111         }
112
113         return -EINVAL;
114 }