1 /*
2 * IrNET protocol module : Synchronous PPP over an IrDA socket.
3 *
4 * Jean II - HPL `00 - <jt@hpl.hp.com>
5 *
6 * This file contains all definitions and declarations necessary for the
7 * PPP part of the IrNET module.
8 * This file is a private header, so other modules don't want to know
9 * what's in there...
10 */
11
12 #ifndef IRNET_PPP_H
13 #define IRNET_PPP_H
14
15 /***************************** INCLUDES *****************************/
16
17 #include "irnet.h" /* Module global include */
18
19 /************************ CONSTANTS & MACROS ************************/
20
21 /* /dev/irnet file constants */
22 #define IRNET_MAJOR 10 /* Misc range */
23 #define IRNET_MINOR 187 /* Official allocation */
24
25 /* IrNET control channel stuff */
26 #define IRNET_MAX_COMMAND 256 /* Max length of a command line */
27
28 /* PPP hardcore stuff */
29
30 /* Bits in rbits (PPP flags in irnet struct) */
31 #define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
32
33 /* Bit numbers in busy */
34 #define XMIT_BUSY 0
35 #define RECV_BUSY 1
36 #define XMIT_WAKEUP 2
37 #define XMIT_FULL 3
38
39 /* Queue management */
40 #define PPPSYNC_MAX_RQLEN 32 /* arbitrary */
41
42 /****************************** TYPES ******************************/
43
44
45 /**************************** PROTOTYPES ****************************/
46
47 /* ----------------------- CONTROL CHANNEL ----------------------- */
48 static inline ssize_t
49 irnet_ctrl_write(irnet_socket *,
50 const char *,
51 size_t);
52 static inline ssize_t
53 irnet_ctrl_read(irnet_socket *,
54 struct file *,
55 char *,
56 size_t);
57 static inline unsigned int
58 irnet_ctrl_poll(irnet_socket *,
59 struct file *,
60 poll_table *);
61 /* ----------------------- CHARACTER DEVICE ----------------------- */
62 static int
63 dev_irnet_open(struct inode *, /* fs callback : open */
64 struct file *),
65 dev_irnet_close(struct inode *,
66 struct file *);
67 static ssize_t
68 dev_irnet_write(struct file *,
69 const char __user *,
70 size_t,
71 loff_t *),
72 dev_irnet_read(struct file *,
73 char __user *,
74 size_t,
75 loff_t *);
76 static unsigned int
77 dev_irnet_poll(struct file *,
78 poll_table *);
79 static int
80 dev_irnet_ioctl(struct inode *,
81 struct file *,
82 unsigned int,
83 unsigned long);
84 /* ------------------------ PPP INTERFACE ------------------------ */
85 static inline struct sk_buff *
86 irnet_prepare_skb(irnet_socket *,
87 struct sk_buff *);
88 static int
89 ppp_irnet_send(struct ppp_channel *,
90 struct sk_buff *);
91 static int
92 ppp_irnet_ioctl(struct ppp_channel *,
93 unsigned int,
94 unsigned long);
95
96 /**************************** VARIABLES ****************************/
97
98 /* Filesystem callbacks (to call us) */
99 static struct file_operations irnet_device_fops =
100 {
101 .owner = THIS_MODULE,
102 .read = dev_irnet_read,
103 .write = dev_irnet_write,
104 .poll = dev_irnet_poll,
105 .ioctl = dev_irnet_ioctl,
106 .open = dev_irnet_open,
107 .release = dev_irnet_close
108 /* Also : llseek, readdir, mmap, flush, fsync, fasync, lock, readv, writev */
109 };
110
111 /* Structure so that the misc major (drivers/char/misc.c) take care of us... */
112 static struct miscdevice irnet_misc_device =
113 {
114 IRNET_MINOR,
115 "irnet",
116 &irnet_device_fops
117 };
118
119 #endif /* IRNET_PPP_H */
120
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