diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/irda/irnet/irnet.h |
Linux-2.6.12-rc2v2.6.12-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 'net/irda/irnet/irnet.h')
-rw-r--r-- | net/irda/irnet/irnet.h | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/net/irda/irnet/irnet.h b/net/irda/irnet/irnet.h new file mode 100644 index 000000000000..9004f7349a76 --- /dev/null +++ b/net/irda/irnet/irnet.h | |||
@@ -0,0 +1,529 @@ | |||
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 definitions and declarations global to the IrNET module, | ||
7 | * all grouped in one place... | ||
8 | * This file is a *private* header, so other modules don't want to know | ||
9 | * what's in there... | ||
10 | * | ||
11 | * Note : as most part of the Linux kernel, this module is available | ||
12 | * under the GNU General Public License (GPL). | ||
13 | */ | ||
14 | |||
15 | #ifndef IRNET_H | ||
16 | #define IRNET_H | ||
17 | |||
18 | /************************** DOCUMENTATION ***************************/ | ||
19 | /* | ||
20 | * What is IrNET | ||
21 | * ------------- | ||
22 | * IrNET is a protocol allowing to carry TCP/IP traffic between two | ||
23 | * IrDA peers in an efficient fashion. It is a thin layer, passing PPP | ||
24 | * packets to IrTTP and vice versa. It uses PPP in synchronous mode, | ||
25 | * because IrTTP offer a reliable sequenced packet service (as opposed | ||
26 | * to a byte stream). In fact, you could see IrNET as carrying TCP/IP | ||
27 | * in a IrDA socket, using PPP to provide the glue. | ||
28 | * | ||
29 | * The main difference with traditional PPP over IrCOMM is that we | ||
30 | * avoid the framing and serial emulation which are a performance | ||
31 | * bottleneck. It also allows multipoint communications in a sensible | ||
32 | * fashion. | ||
33 | * | ||
34 | * The main difference with IrLAN is that we use PPP for the link | ||
35 | * management, which is more standard, interoperable and flexible than | ||
36 | * the IrLAN protocol. For example, PPP adds authentication, | ||
37 | * encryption, compression, header compression and automated routing | ||
38 | * setup. And, as IrNET let PPP do the hard work, the implementation | ||
39 | * is much simpler than IrLAN. | ||
40 | * | ||
41 | * The Linux implementation | ||
42 | * ------------------------ | ||
43 | * IrNET is written on top of the Linux-IrDA stack, and interface with | ||
44 | * the generic Linux PPP driver. Because IrNET depend on recent | ||
45 | * changes of the PPP driver interface, IrNET will work only with very | ||
46 | * recent kernel (2.3.99-pre6 and up). | ||
47 | * | ||
48 | * The present implementation offer the following features : | ||
49 | * o simple user interface using pppd | ||
50 | * o efficient implementation (interface directly to PPP and IrTTP) | ||
51 | * o addressing (you can specify the name of the IrNET recipient) | ||
52 | * o multipoint operation (limited by IrLAP specification) | ||
53 | * o information in /proc/net/irda/irnet | ||
54 | * o IrNET events on /dev/irnet (for user space daemon) | ||
55 | * o IrNET daemon (irnetd) to automatically handle incoming requests | ||
56 | * o Windows 2000 compatibility (tested, but need more work) | ||
57 | * Currently missing : | ||
58 | * o Lot's of testing (that's your job) | ||
59 | * o Connection retries (may be too hard to do) | ||
60 | * o Check pppd persist mode | ||
61 | * o User space daemon (to automatically handle incoming requests) | ||
62 | * | ||
63 | * The setup is not currently the most easy, but this should get much | ||
64 | * better when everything will get integrated... | ||
65 | * | ||
66 | * Acknowledgements | ||
67 | * ---------------- | ||
68 | * This module is based on : | ||
69 | * o The PPP driver (ppp_synctty/ppp_generic) by Paul Mackerras | ||
70 | * o The IrLAN protocol (irlan_common/XXX) by Dag Brattli | ||
71 | * o The IrSock interface (af_irda) by Dag Brattli | ||
72 | * o Some other bits from the kernel and my drivers... | ||
73 | * Infinite thanks to those brave souls for providing the infrastructure | ||
74 | * upon which IrNET is built. | ||
75 | * | ||
76 | * Thanks to all my collegues in HP for helping me. In particular, | ||
77 | * thanks to Salil Pradhan and Bill Serra for W2k testing... | ||
78 | * Thanks to Luiz Magalhaes for irnetd and much testing... | ||
79 | * | ||
80 | * Thanks to Alan Cox for answering lot's of my stupid questions, and | ||
81 | * to Paul Mackerras answering my questions on how to best integrate | ||
82 | * IrNET and pppd. | ||
83 | * | ||
84 | * Jean II | ||
85 | * | ||
86 | * Note on some implementations choices... | ||
87 | * ------------------------------------ | ||
88 | * 1) Direct interface vs tty/socket | ||
89 | * I could have used a tty interface to hook to ppp and use the full | ||
90 | * socket API to connect to IrDA. The code would have been easier to | ||
91 | * maintain, and maybe the code would have been smaller... | ||
92 | * Instead, we hook directly to ppp_generic and to IrTTP, which make | ||
93 | * things more complicated... | ||
94 | * | ||
95 | * The first reason is flexibility : this allow us to create IrNET | ||
96 | * instances on demand (no /dev/ircommX crap) and to allow linkname | ||
97 | * specification on pppd command line... | ||
98 | * | ||
99 | * Second reason is speed optimisation. If you look closely at the | ||
100 | * transmit and receive paths, you will notice that they are "super lean" | ||
101 | * (that's why they look ugly), with no function calls and as little data | ||
102 | * copy and modification as I could... | ||
103 | * | ||
104 | * 2) irnetd in user space | ||
105 | * irnetd is implemented in user space, which is necessary to call pppd. | ||
106 | * This also give maximum benefits in term of flexibility and customability, | ||
107 | * and allow to offer the event channel, useful for other stuff like debug. | ||
108 | * | ||
109 | * On the other hand, this require a loose coordination between the | ||
110 | * present module and irnetd. One critical area is how incoming request | ||
111 | * are handled. | ||
112 | * When irnet receive an incoming request, it send an event to irnetd and | ||
113 | * drop the incoming IrNET socket. | ||
114 | * irnetd start a pppd instance, which create a new IrNET socket. This new | ||
115 | * socket is then connected in the originating node to the pppd instance. | ||
116 | * At this point, in the originating node, the first socket is closed. | ||
117 | * | ||
118 | * I admit, this is a bit messy and waste some resources. The alternative | ||
119 | * is caching incoming socket, and that's also quite messy and waste | ||
120 | * resources. | ||
121 | * We also make connection time slower. For example, on a 115 kb/s link it | ||
122 | * adds 60ms to the connection time (770 ms). However, this is slower than | ||
123 | * the time it takes to fire up pppd on my P133... | ||
124 | * | ||
125 | * | ||
126 | * History : | ||
127 | * ------- | ||
128 | * | ||
129 | * v1 - 15.5.00 - Jean II | ||
130 | * o Basic IrNET (hook to ppp_generic & IrTTP - incl. multipoint) | ||
131 | * o control channel on /dev/irnet (set name/address) | ||
132 | * o event channel on /dev/irnet (for user space daemon) | ||
133 | * | ||
134 | * v2 - 5.6.00 - Jean II | ||
135 | * o Enable DROP_NOT_READY to avoid PPP timeouts & other weirdness... | ||
136 | * o Add DISCONNECT_TO event and rename DISCONNECT_FROM. | ||
137 | * o Set official device number alloaction on /dev/irnet | ||
138 | * | ||
139 | * v3 - 30.8.00 - Jean II | ||
140 | * o Update to latest Linux-IrDA changes : | ||
141 | * - queue_t => irda_queue_t | ||
142 | * o Update to ppp-2.4.0 : | ||
143 | * - move irda_irnet_connect from PPPIOCATTACH to TIOCSETD | ||
144 | * o Add EXPIRE event (depend on new IrDA-Linux patch) | ||
145 | * o Switch from `hashbin_remove' to `hashbin_remove_this' to fix | ||
146 | * a multilink bug... (depend on new IrDA-Linux patch) | ||
147 | * o fix a self->daddr to self->raddr in irda_irnet_connect to fix | ||
148 | * another multilink bug (darn !) | ||
149 | * o Remove LINKNAME_IOCTL cruft | ||
150 | * | ||
151 | * v3b - 31.8.00 - Jean II | ||
152 | * o Dump discovery log at event channel startup | ||
153 | * | ||
154 | * v4 - 28.9.00 - Jean II | ||
155 | * o Fix interaction between poll/select and dump discovery log | ||
156 | * o Add IRNET_BLOCKED_LINK event (depend on new IrDA-Linux patch) | ||
157 | * o Add IRNET_NOANSWER_FROM event (mostly to help support) | ||
158 | * o Release flow control in disconnect_indication | ||
159 | * o Block packets while connecting (speed up connections) | ||
160 | * | ||
161 | * v5 - 11.01.01 - Jean II | ||
162 | * o Init self->max_header_size, just in case... | ||
163 | * o Set up ap->chan.hdrlen, to get zero copy on tx side working. | ||
164 | * o avoid tx->ttp->flow->ppp->tx->... loop, by checking flow state | ||
165 | * Thanks to Christian Gennerat for finding this bug ! | ||
166 | * --- | ||
167 | * o Declare the proper MTU/MRU that we can support | ||
168 | * (but PPP doesn't read the MTU value :-() | ||
169 | * o Declare hashbin HB_NOLOCK instead of HB_LOCAL to avoid | ||
170 | * disabling and enabling irq twice | ||
171 | * | ||
172 | * v6 - 31.05.01 - Jean II | ||
173 | * o Print source address in Found, Discovery, Expiry & Request events | ||
174 | * o Print requested source address in /proc/net/irnet | ||
175 | * o Change control channel input. Allow multiple commands in one line. | ||
176 | * o Add saddr command to change ap->rsaddr (and use that in IrDA) | ||
177 | * --- | ||
178 | * o Make the IrDA connection procedure totally asynchronous. | ||
179 | * Heavy rewrite of the IAS query code and the whole connection | ||
180 | * procedure. Now, irnet_connect() no longer need to be called from | ||
181 | * a process context... | ||
182 | * o Enable IrDA connect retries in ppp_irnet_send(). The good thing | ||
183 | * is that IrDA connect retries are directly driven by PPP LCP | ||
184 | * retries (we retry for each LCP packet), so that everything | ||
185 | * is transparently controlled from pppd lcp-max-configure. | ||
186 | * o Add ttp_connect flag to prevent rentry on the connect procedure | ||
187 | * o Test and fixups to eliminate side effects of retries | ||
188 | * | ||
189 | * v7 - 22.08.01 - Jean II | ||
190 | * o Cleanup : Change "saddr = 0x0" to "saddr = DEV_ADDR_ANY" | ||
191 | * o Fix bug in BLOCK_WHEN_CONNECT introduced in v6 : due to the | ||
192 | * asynchronous IAS query, self->tsap is NULL when PPP send the | ||
193 | * first packet. This was preventing "connect-delay 0" to work. | ||
194 | * Change the test in ppp_irnet_send() to self->ttp_connect. | ||
195 | * | ||
196 | * v8 - 1.11.01 - Jean II | ||
197 | * o Tighten the use of self->ttp_connect and self->ttp_open to | ||
198 | * prevent various race conditions. | ||
199 | * o Avoid leaking discovery log and skb | ||
200 | * o Replace "self" with "server" in irnet_connect_indication() to | ||
201 | * better detect cut'n'paste error ;-) | ||
202 | * | ||
203 | * v9 - 29.11.01 - Jean II | ||
204 | * o Fix event generation in disconnect indication that I broke in v8 | ||
205 | * It was always generation "No-Answer" because I was testing ttp_open | ||
206 | * just after clearing it. *blush*. | ||
207 | * o Use newly created irttp_listen() to fix potential crash when LAP | ||
208 | * destroyed before irnet module removed. | ||
209 | * | ||
210 | * v10 - 4.3.2 - Jean II | ||
211 | * o When receiving a disconnect indication, don't reenable the | ||
212 | * PPP Tx queue, this will trigger a reconnect. Instead, close | ||
213 | * the channel, which will kill pppd... | ||
214 | * | ||
215 | * v11 - 20.3.02 - Jean II | ||
216 | * o Oops ! v10 fix disabled IrNET retries and passive behaviour. | ||
217 | * Better fix in irnet_disconnect_indication() : | ||
218 | * - if connected, kill pppd via hangup. | ||
219 | * - if not connected, reenable ppp Tx, which trigger IrNET retry. | ||
220 | * | ||
221 | * v12 - 10.4.02 - Jean II | ||
222 | * o Fix race condition in irnet_connect_indication(). | ||
223 | * If the socket was already trying to connect, drop old connection | ||
224 | * and use new one only if acting as primary. See comments. | ||
225 | * | ||
226 | * v13 - 30.5.02 - Jean II | ||
227 | * o Update module init code | ||
228 | * | ||
229 | * v14 - 20.2.03 - Jean II | ||
230 | * o Add discovery hint bits in the control channel. | ||
231 | * o Remove obsolete MOD_INC/DEC_USE_COUNT in favor of .owner | ||
232 | * | ||
233 | * v15 - 7.4.03 - Jean II | ||
234 | * o Replace spin_lock_irqsave() with spin_lock_bh() so that we can | ||
235 | * use ppp_unit_number(). It's probably also better overall... | ||
236 | * o Disable call to ppp_unregister_channel(), because we can't do it. | ||
237 | */ | ||
238 | |||
239 | /***************************** INCLUDES *****************************/ | ||
240 | |||
241 | #include <linux/module.h> | ||
242 | |||
243 | #include <linux/kernel.h> | ||
244 | #include <linux/skbuff.h> | ||
245 | #include <linux/tty.h> | ||
246 | #include <linux/proc_fs.h> | ||
247 | #include <linux/devfs_fs_kernel.h> | ||
248 | #include <linux/netdevice.h> | ||
249 | #include <linux/miscdevice.h> | ||
250 | #include <linux/poll.h> | ||
251 | #include <linux/config.h> | ||
252 | #include <linux/ctype.h> /* isspace() */ | ||
253 | #include <asm/uaccess.h> | ||
254 | #include <linux/init.h> | ||
255 | |||
256 | #include <linux/ppp_defs.h> | ||
257 | #include <linux/if_ppp.h> | ||
258 | #include <linux/ppp_channel.h> | ||
259 | |||
260 | #include <net/irda/irda.h> | ||
261 | #include <net/irda/iriap.h> | ||
262 | #include <net/irda/irias_object.h> | ||
263 | #include <net/irda/irlmp.h> | ||
264 | #include <net/irda/irttp.h> | ||
265 | #include <net/irda/discovery.h> | ||
266 | |||
267 | /***************************** OPTIONS *****************************/ | ||
268 | /* | ||
269 | * Define or undefine to compile or not some optional part of the | ||
270 | * IrNET driver... | ||
271 | * Note : the present defaults make sense, play with that at your | ||
272 | * own risk... | ||
273 | */ | ||
274 | /* IrDA side of the business... */ | ||
275 | #define DISCOVERY_NOMASK /* To enable W2k compatibility... */ | ||
276 | #define ADVERTISE_HINT /* Advertise IrLAN hint bit */ | ||
277 | #define ALLOW_SIMULT_CONNECT /* This seem to work, cross fingers... */ | ||
278 | #define DISCOVERY_EVENTS /* Query the discovery log to post events */ | ||
279 | #define INITIAL_DISCOVERY /* Dump current discovery log as events */ | ||
280 | #undef STREAM_COMPAT /* Not needed - potentially messy */ | ||
281 | #undef CONNECT_INDIC_KICK /* Might mess IrDA, not needed */ | ||
282 | #undef FAIL_SEND_DISCONNECT /* Might mess IrDA, not needed */ | ||
283 | #undef PASS_CONNECT_PACKETS /* Not needed ? Safe */ | ||
284 | #undef MISSING_PPP_API /* Stuff I wish I could do */ | ||
285 | |||
286 | /* PPP side of the business */ | ||
287 | #define BLOCK_WHEN_CONNECT /* Block packets when connecting */ | ||
288 | #define CONNECT_IN_SEND /* Retry IrDA connection procedure */ | ||
289 | #undef FLUSH_TO_PPP /* Not sure about this one, let's play safe */ | ||
290 | #undef SECURE_DEVIRNET /* Bah... */ | ||
291 | |||
292 | /****************************** DEBUG ******************************/ | ||
293 | |||
294 | /* | ||
295 | * This set of flags enable and disable all the various warning, | ||
296 | * error and debug message of this driver. | ||
297 | * Each section can be enabled and disabled independently | ||
298 | */ | ||
299 | /* In the PPP part */ | ||
300 | #define DEBUG_CTRL_TRACE 0 /* Control channel */ | ||
301 | #define DEBUG_CTRL_INFO 0 /* various info */ | ||
302 | #define DEBUG_CTRL_ERROR 1 /* problems */ | ||
303 | #define DEBUG_FS_TRACE 0 /* filesystem callbacks */ | ||
304 | #define DEBUG_FS_INFO 0 /* various info */ | ||
305 | #define DEBUG_FS_ERROR 1 /* problems */ | ||
306 | #define DEBUG_PPP_TRACE 0 /* PPP related functions */ | ||
307 | #define DEBUG_PPP_INFO 0 /* various info */ | ||
308 | #define DEBUG_PPP_ERROR 1 /* problems */ | ||
309 | #define DEBUG_MODULE_TRACE 0 /* module insertion/removal */ | ||
310 | #define DEBUG_MODULE_ERROR 1 /* problems */ | ||
311 | |||
312 | /* In the IrDA part */ | ||
313 | #define DEBUG_IRDA_SR_TRACE 0 /* IRDA subroutines */ | ||
314 | #define DEBUG_IRDA_SR_INFO 0 /* various info */ | ||
315 | #define DEBUG_IRDA_SR_ERROR 1 /* problems */ | ||
316 | #define DEBUG_IRDA_SOCK_TRACE 0 /* IRDA main socket functions */ | ||
317 | #define DEBUG_IRDA_SOCK_INFO 0 /* various info */ | ||
318 | #define DEBUG_IRDA_SOCK_ERROR 1 /* problems */ | ||
319 | #define DEBUG_IRDA_SERV_TRACE 0 /* The IrNET server */ | ||
320 | #define DEBUG_IRDA_SERV_INFO 0 /* various info */ | ||
321 | #define DEBUG_IRDA_SERV_ERROR 1 /* problems */ | ||
322 | #define DEBUG_IRDA_TCB_TRACE 0 /* IRDA IrTTP callbacks */ | ||
323 | #define DEBUG_IRDA_CB_INFO 0 /* various info */ | ||
324 | #define DEBUG_IRDA_CB_ERROR 1 /* problems */ | ||
325 | #define DEBUG_IRDA_OCB_TRACE 0 /* IRDA other callbacks */ | ||
326 | #define DEBUG_IRDA_OCB_INFO 0 /* various info */ | ||
327 | #define DEBUG_IRDA_OCB_ERROR 1 /* problems */ | ||
328 | |||
329 | #define DEBUG_ASSERT 0 /* Verify all assertions */ | ||
330 | |||
331 | /* | ||
332 | * These are the macros we are using to actually print the debug | ||
333 | * statements. Don't look at it, it's ugly... | ||
334 | * | ||
335 | * One of the trick is that, as the DEBUG_XXX are constant, the | ||
336 | * compiler will optimise away the if() in all cases. | ||
337 | */ | ||
338 | /* All error messages (will show up in the normal logs) */ | ||
339 | #define DERROR(dbg, format, args...) \ | ||
340 | {if(DEBUG_##dbg) \ | ||
341 | printk(KERN_INFO "irnet: %s(): " format, __FUNCTION__ , ##args);} | ||
342 | |||
343 | /* Normal debug message (will show up in /var/log/debug) */ | ||
344 | #define DEBUG(dbg, format, args...) \ | ||
345 | {if(DEBUG_##dbg) \ | ||
346 | printk(KERN_DEBUG "irnet: %s(): " format, __FUNCTION__ , ##args);} | ||
347 | |||
348 | /* Entering a function (trace) */ | ||
349 | #define DENTER(dbg, format, args...) \ | ||
350 | {if(DEBUG_##dbg) \ | ||
351 | printk(KERN_DEBUG "irnet: -> %s" format, __FUNCTION__ , ##args);} | ||
352 | |||
353 | /* Entering and exiting a function in one go (trace) */ | ||
354 | #define DPASS(dbg, format, args...) \ | ||
355 | {if(DEBUG_##dbg) \ | ||
356 | printk(KERN_DEBUG "irnet: <>%s" format, __FUNCTION__ , ##args);} | ||
357 | |||
358 | /* Exiting a function (trace) */ | ||
359 | #define DEXIT(dbg, format, args...) \ | ||
360 | {if(DEBUG_##dbg) \ | ||
361 | printk(KERN_DEBUG "irnet: <-%s()" format, __FUNCTION__ , ##args);} | ||
362 | |||
363 | /* Exit a function with debug */ | ||
364 | #define DRETURN(ret, dbg, args...) \ | ||
365 | {DEXIT(dbg, ": " args);\ | ||
366 | return ret; } | ||
367 | |||
368 | /* Exit a function on failed condition */ | ||
369 | #define DABORT(cond, ret, dbg, args...) \ | ||
370 | {if(cond) {\ | ||
371 | DERROR(dbg, args);\ | ||
372 | return ret; }} | ||
373 | |||
374 | /* Invalid assertion, print out an error and exit... */ | ||
375 | #define DASSERT(cond, ret, dbg, args...) \ | ||
376 | {if((DEBUG_ASSERT) && !(cond)) {\ | ||
377 | DERROR(dbg, "Invalid assertion: " args);\ | ||
378 | return ret; }} | ||
379 | |||
380 | /************************ CONSTANTS & MACROS ************************/ | ||
381 | |||
382 | /* Paranoia */ | ||
383 | #define IRNET_MAGIC 0xB00754 | ||
384 | |||
385 | /* Number of control events in the control channel buffer... */ | ||
386 | #define IRNET_MAX_EVENTS 8 /* Should be more than enough... */ | ||
387 | |||
388 | /****************************** TYPES ******************************/ | ||
389 | |||
390 | /* | ||
391 | * This is the main structure where we store all the data pertaining to | ||
392 | * one instance of irnet. | ||
393 | * Note : in irnet functions, a pointer this structure is usually called | ||
394 | * "ap" or "self". If the code is borrowed from the IrDA stack, it tend | ||
395 | * to be called "self", and if it is borrowed from the PPP driver it is | ||
396 | * "ap". Apart from that, it's exactly the same structure ;-) | ||
397 | */ | ||
398 | typedef struct irnet_socket | ||
399 | { | ||
400 | /* ------------------- Instance management ------------------- */ | ||
401 | /* We manage a linked list of IrNET socket instances */ | ||
402 | irda_queue_t q; /* Must be first - for hasbin */ | ||
403 | int magic; /* Paranoia */ | ||
404 | |||
405 | /* --------------------- FileSystem part --------------------- */ | ||
406 | /* "pppd" interact directly with us on a /dev/ file */ | ||
407 | struct file * file; /* File descriptor of this instance */ | ||
408 | /* TTY stuff - to keep "pppd" happy */ | ||
409 | struct termios termios; /* Various tty flags */ | ||
410 | /* Stuff for the control channel */ | ||
411 | int event_index; /* Last read in the event log */ | ||
412 | |||
413 | /* ------------------------- PPP part ------------------------- */ | ||
414 | /* We interface directly to the ppp_generic driver in the kernel */ | ||
415 | int ppp_open; /* registered with ppp_generic */ | ||
416 | struct ppp_channel chan; /* Interface to generic ppp layer */ | ||
417 | |||
418 | int mru; /* Max size of PPP payload */ | ||
419 | u32 xaccm[8]; /* Asynchronous character map (just */ | ||
420 | u32 raccm; /* to please pppd - dummy) */ | ||
421 | unsigned int flags; /* PPP flags (compression, ...) */ | ||
422 | unsigned int rbits; /* Unused receive flags ??? */ | ||
423 | |||
424 | /* ------------------------ IrTTP part ------------------------ */ | ||
425 | /* We create a pseudo "socket" over the IrDA tranport */ | ||
426 | unsigned long ttp_open; /* Set when IrTTP is ready */ | ||
427 | unsigned long ttp_connect; /* Set when IrTTP is connecting */ | ||
428 | struct tsap_cb * tsap; /* IrTTP instance (the connection) */ | ||
429 | |||
430 | char rname[NICKNAME_MAX_LEN + 1]; | ||
431 | /* IrDA nickname of destination */ | ||
432 | __u32 rdaddr; /* Requested peer IrDA address */ | ||
433 | __u32 rsaddr; /* Requested local IrDA address */ | ||
434 | __u32 daddr; /* actual peer IrDA address */ | ||
435 | __u32 saddr; /* my local IrDA address */ | ||
436 | __u8 dtsap_sel; /* Remote TSAP selector */ | ||
437 | __u8 stsap_sel; /* Local TSAP selector */ | ||
438 | |||
439 | __u32 max_sdu_size_rx;/* Socket parameters used for IrTTP */ | ||
440 | __u32 max_sdu_size_tx; | ||
441 | __u32 max_data_size; | ||
442 | __u8 max_header_size; | ||
443 | LOCAL_FLOW tx_flow; /* State of the Tx path in IrTTP */ | ||
444 | |||
445 | /* ------------------- IrLMP and IrIAS part ------------------- */ | ||
446 | /* Used for IrDA Discovery and socket name resolution */ | ||
447 | void * ckey; /* IrLMP client handle */ | ||
448 | __u16 mask; /* Hint bits mask (filter discov.)*/ | ||
449 | int nslots; /* Number of slots for discovery */ | ||
450 | |||
451 | struct iriap_cb * iriap; /* Used to query remote IAS */ | ||
452 | int errno; /* status of the IAS query */ | ||
453 | |||
454 | /* -------------------- Discovery log part -------------------- */ | ||
455 | /* Used by initial discovery on the control channel | ||
456 | * and by irnet_discover_daddr_and_lsap_sel() */ | ||
457 | struct irda_device_info *discoveries; /* Copy of the discovery log */ | ||
458 | int disco_index; /* Last read in the discovery log */ | ||
459 | int disco_number; /* Size of the discovery log */ | ||
460 | |||
461 | } irnet_socket; | ||
462 | |||
463 | /* | ||
464 | * This is the various event that we will generate on the control channel | ||
465 | */ | ||
466 | typedef enum irnet_event | ||
467 | { | ||
468 | IRNET_DISCOVER, /* New IrNET node discovered */ | ||
469 | IRNET_EXPIRE, /* IrNET node expired */ | ||
470 | IRNET_CONNECT_TO, /* IrNET socket has connected to other node */ | ||
471 | IRNET_CONNECT_FROM, /* Other node has connected to IrNET socket */ | ||
472 | IRNET_REQUEST_FROM, /* Non satisfied connection request */ | ||
473 | IRNET_NOANSWER_FROM, /* Failed connection request */ | ||
474 | IRNET_BLOCKED_LINK, /* Link (IrLAP) is blocked for > 3s */ | ||
475 | IRNET_DISCONNECT_FROM, /* IrNET socket has disconnected */ | ||
476 | IRNET_DISCONNECT_TO /* Closing IrNET socket */ | ||
477 | } irnet_event; | ||
478 | |||
479 | /* | ||
480 | * This is the storage for an event and its arguments | ||
481 | */ | ||
482 | typedef struct irnet_log | ||
483 | { | ||
484 | irnet_event event; | ||
485 | int unit; | ||
486 | __u32 saddr; | ||
487 | __u32 daddr; | ||
488 | char name[NICKNAME_MAX_LEN + 1]; /* 21 + 1 */ | ||
489 | __u16_host_order hints; /* Discovery hint bits */ | ||
490 | } irnet_log; | ||
491 | |||
492 | /* | ||
493 | * This is the storage for all events and related stuff... | ||
494 | */ | ||
495 | typedef struct irnet_ctrl_channel | ||
496 | { | ||
497 | irnet_log log[IRNET_MAX_EVENTS]; /* Event log */ | ||
498 | int index; /* Current index in log */ | ||
499 | spinlock_t spinlock; /* Serialize access to the event log */ | ||
500 | wait_queue_head_t rwait; /* processes blocked on read (or poll) */ | ||
501 | } irnet_ctrl_channel; | ||
502 | |||
503 | /**************************** PROTOTYPES ****************************/ | ||
504 | /* | ||
505 | * Global functions of the IrNET module | ||
506 | * Note : we list here also functions called from one file to the other. | ||
507 | */ | ||
508 | |||
509 | /* -------------------------- IRDA PART -------------------------- */ | ||
510 | extern int | ||
511 | irda_irnet_create(irnet_socket *); /* Initialise a IrNET socket */ | ||
512 | extern int | ||
513 | irda_irnet_connect(irnet_socket *); /* Try to connect over IrDA */ | ||
514 | extern void | ||
515 | irda_irnet_destroy(irnet_socket *); /* Teardown a IrNET socket */ | ||
516 | extern int | ||
517 | irda_irnet_init(void); /* Initialise IrDA part of IrNET */ | ||
518 | extern void | ||
519 | irda_irnet_cleanup(void); /* Teardown IrDA part of IrNET */ | ||
520 | /* ---------------------------- MODULE ---------------------------- */ | ||
521 | extern int | ||
522 | irnet_init(void); /* Initialise IrNET module */ | ||
523 | |||
524 | /**************************** VARIABLES ****************************/ | ||
525 | |||
526 | /* Control channel stuff - allocated in irnet_irda.h */ | ||
527 | extern struct irnet_ctrl_channel irnet_events; | ||
528 | |||
529 | #endif /* IRNET_H */ | ||