Keil Studio Cloud
Mistake on this page?
Report an issue in GitHub or email us
ppp_opts.h
1 /*
2  * Redistribution and use in source and binary forms, with or without modification,
3  * are permitted provided that the following conditions are met:
4  *
5  * 1. Redistributions of source code must retain the above copyright notice,
6  * this list of conditions and the following disclaimer.
7  * 2. Redistributions in binary form must reproduce the above copyright notice,
8  * this list of conditions and the following disclaimer in the documentation
9  * and/or other materials provided with the distribution.
10  * 3. The name of the author may not be used to endorse or promote products
11  * derived from this software without specific prior written permission.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
14  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
16  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
17  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
18  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
19  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
20  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
21  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
22  * OF SUCH DAMAGE.
23  *
24  * This file is part of the lwIP TCP/IP stack.
25  *
26  */
27 
28 #ifndef PPP_OPTS_H
29 #define PPP_OPTS_H
30 
31 #include "nsapi_types.h"
32 
33 // Enable PPP for now either from lwIP PPP configuration (obsolete) or from PPP service configuration
34 #if MBED_CONF_PPP_ENABLED || MBED_CONF_LWIP_PPP_ENABLED
35 
36 #define PPP_SUPPORT 1
37 
38 // For LWIP stack enable PPP Ipv4/Ipv6 support from LWIP IP version flags
39 #define LWIP 0x11991199
40 
41 #if MBED_CONF_PPP_IPV4_ENABLED || ((MBED_CONF_NSAPI_DEFAULT_STACK == LWIP) && MBED_CONF_LWIP_IPV4_ENABLED)
42 #define PPP_IPV4_SUPPORT 1
43 #endif
44 
45 #if MBED_CONF_PPP_IPV6_ENABLED || ((MBED_CONF_NSAPI_DEFAULT_STACK == LWIP) && MBED_CONF_LWIP_IPV6_ENABLED)
46 #define PPP_IPV6_SUPPORT 1
47 #endif
48 #undef LWIP
49 
50 #if MBED_CONF_PPP_ENABLE_TRACE
51 // Traces every packet
52 #define PPP_TRACE_ENABLE 1
53 #define PPP_TRACE_BUFFER_SIZE 0 //50000
54 #endif
55 
56 #endif
57 
58 #if PPP_SUPPORT
59 
60 #define CHAP_SUPPORT 1
61 #define PPP_INPROC_IRQ_SAFE 1
62 #define NO_SYS 1
63 // Save RAM
64 #define PAP_SUPPORT 0
65 #define VJ_SUPPORT 0
66 #define PRINTPKT_SUPPORT 0
67 
68 #define MAXNAMELEN 64 /* max length of hostname or name for auth */
69 #define MAXSECRETLEN 64
70 
71 #define PPP_DNS 1
72 
73 // Used as maximum size for output buffer, to restrict the memory manager get_pool_alloc_unit()
74 #ifndef PBUF_POOL_BUFSIZE
75 #define PBUF_POOL_BUFSIZE 536 + 40
76 #endif
77 
78 #endif // PPP_SUPPORT
79 
80 #include "ppp_service_if.h"
81 
82 /**
83  * PPP_SUPPORT==1: Enable PPP.
84  */
85 #ifndef PPP_SUPPORT
86 #define PPP_SUPPORT 0
87 #endif
88 
89 /**
90  * PPPOE_SUPPORT==1: Enable PPP Over Ethernet
91  */
92 #ifndef PPPOE_SUPPORT
93 #define PPPOE_SUPPORT 0
94 #endif
95 
96 /**
97  * PPPOL2TP_SUPPORT==1: Enable PPP Over L2TP
98  */
99 #ifndef PPPOL2TP_SUPPORT
100 #define PPPOL2TP_SUPPORT 0
101 #endif
102 
103 /**
104  * PPPOL2TP_AUTH_SUPPORT==1: Enable PPP Over L2TP Auth (enable MD5 support)
105  */
106 #ifndef PPPOL2TP_AUTH_SUPPORT
107 #define PPPOL2TP_AUTH_SUPPORT PPPOL2TP_SUPPORT
108 #endif
109 
110 /**
111  * PPPOS_SUPPORT==1: Enable PPP Over Serial
112  */
113 #ifndef PPPOS_SUPPORT
114 #define PPPOS_SUPPORT PPP_SUPPORT
115 #endif
116 
117 /**
118  * PPP_API==1: Enable PPP API (in pppapi.c)
119  */
120 #ifndef PPP_API
121 #define PPP_API 0 //(PPP_SUPPORT && (NO_SYS == 0))
122 #endif
123 
124 #if PPP_SUPPORT
125 
126 /**
127  * MEMP_NUM_PPP_PCB: the number of simultaneously active PPP
128  * connections (requires the PPP_SUPPORT option)
129  */
130 #ifndef MEMP_NUM_PPP_PCB
131 #define MEMP_NUM_PPP_PCB 1
132 #endif
133 
134 /**
135  * PPP_NUM_TIMEOUTS_PER_PCB: the number of sys_timeouts running in parallel per
136  * ppp_pcb. See the detailed explanation at the end of ppp_impl.h about simultaneous
137  * timers analysis.
138  */
139 #ifndef PPP_NUM_TIMEOUTS_PER_PCB
140 #define PPP_NUM_TIMEOUTS_PER_PCB (1 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT)
141 #endif
142 
143 /* The number of sys_timeouts required for the PPP module */
144 #define PPP_NUM_TIMEOUTS (PPP_SUPPORT * PPP_NUM_TIMEOUTS_PER_PCB * MEMP_NUM_PPP_PCB)
145 
146 /**
147  * MEMP_NUM_PPPOS_INTERFACES: the number of concurrently active PPPoS
148  * interfaces (only used with PPPOS_SUPPORT==1)
149  */
150 #ifndef MEMP_NUM_PPPOS_INTERFACES
151 #define MEMP_NUM_PPPOS_INTERFACES MEMP_NUM_PPP_PCB
152 #endif
153 
154 /**
155  * MEMP_NUM_PPPOE_INTERFACES: the number of concurrently active PPPoE
156  * interfaces (only used with PPPOE_SUPPORT==1)
157  */
158 #ifndef MEMP_NUM_PPPOE_INTERFACES
159 #define MEMP_NUM_PPPOE_INTERFACES 1
160 #endif
161 
162 /**
163  * MEMP_NUM_PPPOL2TP_INTERFACES: the number of concurrently active PPPoL2TP
164  * interfaces (only used with PPPOL2TP_SUPPORT==1)
165  */
166 #ifndef MEMP_NUM_PPPOL2TP_INTERFACES
167 #define MEMP_NUM_PPPOL2TP_INTERFACES 1
168 #endif
169 
170 /**
171  * MEMP_NUM_PPP_API_MSG: Number of concurrent PPP API messages (in pppapi.c)
172  */
173 #ifndef MEMP_NUM_PPP_API_MSG
174 #define MEMP_NUM_PPP_API_MSG 5
175 #endif
176 
177 
178 /**
179  * PPP_INPROC_IRQ_SAFE==1 call pppos_input() using tcpip_callback().
180  *
181  * Please read the "PPPoS input path" chapter in the PPP documentation about this option.
182  */
183 #ifndef PPP_INPROC_IRQ_SAFE
184 #define PPP_INPROC_IRQ_SAFE 1
185 #endif
186 
187 /**
188  * PRINTPKT_SUPPORT==1: Enable PPP print packet support
189  *
190  * Mandatory for debugging, it displays exchanged packet content in debug trace.
191  */
192 #ifndef PRINTPKT_SUPPORT
193 #define PRINTPKT_SUPPORT 0
194 #endif
195 
196 /**
197  * PPP_NOTIFY_PHASE==1: Support PPP notify phase support
198  *
199  * PPP notify phase support allows you to set a callback which is
200  * called on change of the internal PPP state machine.
201  *
202  * This can be used for example to set a LED pattern depending on the
203  * current phase of the PPP session.
204  */
205 #ifndef PPP_NOTIFY_PHASE
206 #define PPP_NOTIFY_PHASE 0
207 #endif
208 
209 /**
210  * pbuf_type PPP is using for LCP, PAP, CHAP, EAP, CCP, IPCP and IP6CP packets.
211  *
212  * Memory allocated must be single buffered for PPP to works, it requires pbuf
213  * that are not going to be chained when allocated. This requires setting
214  * PBUF_POOL_BUFSIZE to at least 512 bytes, which is quite huge for small systems.
215  *
216  * Setting PPP_USE_PBUF_RAM to 1 makes PPP use memory from heap where continuous
217  * buffers are required, allowing you to use a smaller PBUF_POOL_BUFSIZE.
218  */
219 #ifndef PPP_USE_PBUF_RAM
220 #define PPP_USE_PBUF_RAM 0
221 #endif
222 
223 /**
224  * PPP_FCS_TABLE: Keep a 256*2 byte table to speed up FCS calculation for PPPoS
225  */
226 #ifndef PPP_FCS_TABLE
227 #define PPP_FCS_TABLE 1
228 #endif
229 
230 /**
231  * PAP_SUPPORT==1: Support PAP.
232  */
233 #ifndef PAP_SUPPORT
234 #define PAP_SUPPORT 0
235 #endif
236 
237 /**
238  * CHAP_SUPPORT==1: Support CHAP.
239  */
240 #ifndef CHAP_SUPPORT
241 #define CHAP_SUPPORT 0
242 #endif
243 
244 /**
245  * MSCHAP_SUPPORT==1: Support MSCHAP.
246  */
247 #ifndef MSCHAP_SUPPORT
248 #define MSCHAP_SUPPORT 0
249 #endif
250 #if MSCHAP_SUPPORT
251 /* MSCHAP requires CHAP support */
252 #undef CHAP_SUPPORT
253 #define CHAP_SUPPORT 1
254 #endif /* MSCHAP_SUPPORT */
255 
256 /**
257  * EAP_SUPPORT==1: Support EAP.
258  */
259 #ifndef EAP_SUPPORT
260 #define EAP_SUPPORT 0
261 #endif
262 
263 /**
264  * CCP_SUPPORT==1: Support CCP.
265  */
266 #ifndef CCP_SUPPORT
267 #define CCP_SUPPORT 0
268 #endif
269 
270 /**
271  * MPPE_SUPPORT==1: Support MPPE.
272  */
273 #ifndef MPPE_SUPPORT
274 #define MPPE_SUPPORT 0
275 #endif
276 #if MPPE_SUPPORT
277 /* MPPE requires CCP support */
278 #undef CCP_SUPPORT
279 #define CCP_SUPPORT 1
280 /* MPPE requires MSCHAP support */
281 #undef MSCHAP_SUPPORT
282 #define MSCHAP_SUPPORT 1
283 /* MSCHAP requires CHAP support */
284 #undef CHAP_SUPPORT
285 #define CHAP_SUPPORT 1
286 #endif /* MPPE_SUPPORT */
287 
288 /**
289  * CBCP_SUPPORT==1: Support CBCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
290  */
291 #ifndef CBCP_SUPPORT
292 #define CBCP_SUPPORT 0
293 #endif
294 
295 /**
296  * ECP_SUPPORT==1: Support ECP. CURRENTLY NOT SUPPORTED! DO NOT SET!
297  */
298 #ifndef ECP_SUPPORT
299 #define ECP_SUPPORT 0
300 #endif
301 
302 /**
303  * DEMAND_SUPPORT==1: Support dial on demand. CURRENTLY NOT SUPPORTED! DO NOT SET!
304  */
305 #ifndef DEMAND_SUPPORT
306 #define DEMAND_SUPPORT 0
307 #endif
308 
309 /**
310  * LQR_SUPPORT==1: Support Link Quality Report. Do nothing except exchanging some LCP packets.
311  */
312 #ifndef LQR_SUPPORT
313 #define LQR_SUPPORT 0
314 #endif
315 
316 /**
317  * PPP_SERVER==1: Enable PPP server support (waiting for incoming PPP session).
318  *
319  * Currently only supported for PPPoS.
320  */
321 #ifndef PPP_SERVER
322 #define PPP_SERVER 0
323 #endif
324 
325 #if PPP_SERVER
326 /*
327  * PPP_OUR_NAME: Our name for authentication purposes
328  */
329 #ifndef PPP_OUR_NAME
330 #define PPP_OUR_NAME "ppp"
331 #endif
332 #endif /* PPP_SERVER */
333 
334 /**
335  * VJ_SUPPORT==1: Support VJ header compression.
336  */
337 #ifndef VJ_SUPPORT
338 #define VJ_SUPPORT 1
339 #endif
340 /* VJ compression is only supported for TCP over IPv4 over PPPoS. */
341 #if !PPPOS_SUPPORT || !PPP_IPV4_SUPPORT || !LWIP_TCP
342 #undef VJ_SUPPORT
343 #define VJ_SUPPORT 0
344 #endif /* !PPPOS_SUPPORT */
345 
346 /**
347  * PPP_MD5_RANDM==1: Use MD5 for better randomness.
348  * Enabled by default if CHAP, EAP, or L2TP AUTH support is enabled.
349  */
350 #ifndef PPP_MD5_RANDM
351 #define PPP_MD5_RANDM (CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT)
352 #endif
353 
354 /**
355  * PolarSSL embedded library
356  *
357  *
358  * PPP contains some files fetched from the latest BSD release of
359  * the PolarSSL project (PolarSSL 0.10.1-bsd) for ciphers and encryption
360  * methods we need for PPP support.
361  *
362  * The PolarSSL files were cleaned to contain only the necessary struct
363  * fields and functions needed for PPP.
364  *
365  * The PolarSSL API was not changed at all, so if you are already using
366  * PolarSSL you can choose to skip the compilation of the included PolarSSL
367  * library into PPP.
368  *
369  * If you are not using the embedded copy you must include external
370  * libraries into your arch/cc.h port file.
371  *
372  * Beware of the stack requirements which can be a lot larger if you are not
373  * using our cleaned PolarSSL library.
374  */
375 
376 /**
377  * PPP_USE_EXTERNAL_POLARSSL: Use external PolarSSL library
378  */
379 #ifndef PPP_USE_EXTERNAL_POLARSSL
380 #define PPP_USE_EXTERNAL_POLARSSL 0
381 #endif
382 
383 /**
384  * PPP_USE_EXTERNAL_MBEDTLS: Use external mbed TLS library
385  */
386 #ifndef PPP_USE_EXTERNAL_MBEDTLS
387 #define PPP_USE_EXTERNAL_MBEDTLS 0
388 #endif
389 
390 /*
391  * PPP Timeouts
392  */
393 
394 /**
395  * FSM_DEFTIMEOUT: Timeout time in seconds
396  */
397 #ifndef FSM_DEFTIMEOUT
398 #define FSM_DEFTIMEOUT 6
399 #endif
400 
401 /**
402  * FSM_DEFMAXTERMREQS: Maximum Terminate-Request transmissions
403  */
404 #ifndef FSM_DEFMAXTERMREQS
405 #define FSM_DEFMAXTERMREQS 2
406 #endif
407 
408 /**
409  * FSM_DEFMAXCONFREQS: Maximum Configure-Request transmissions
410  */
411 #ifndef FSM_DEFMAXCONFREQS
412 #define FSM_DEFMAXCONFREQS 10
413 #endif
414 
415 /**
416  * FSM_DEFMAXNAKLOOPS: Maximum number of nak loops
417  */
418 #ifndef FSM_DEFMAXNAKLOOPS
419 #define FSM_DEFMAXNAKLOOPS 5
420 #endif
421 
422 /**
423  * UPAP_DEFTIMEOUT: Timeout (seconds) for re-transmitting req
424  */
425 #ifndef UPAP_DEFTIMEOUT
426 #define UPAP_DEFTIMEOUT 6
427 #endif
428 
429 /**
430  * UPAP_DEFTRANSMITS: Maximum number of auth-reqs to send
431  */
432 #ifndef UPAP_DEFTRANSMITS
433 #define UPAP_DEFTRANSMITS 10
434 #endif
435 
436 #if PPP_SERVER
437 /**
438  * UPAP_DEFREQTIME: Time to wait for auth-req from peer
439  */
440 #ifndef UPAP_DEFREQTIME
441 #define UPAP_DEFREQTIME 30
442 #endif
443 #endif /* PPP_SERVER */
444 
445 /**
446  * CHAP_DEFTIMEOUT: Timeout (seconds) for re-transmitting req
447  */
448 #ifndef CHAP_DEFTIMEOUT
449 #define CHAP_DEFTIMEOUT 6
450 #endif
451 
452 /**
453  * CHAP_DEFTRANSMITS: max # times to send challenge
454  */
455 #ifndef CHAP_DEFTRANSMITS
456 #define CHAP_DEFTRANSMITS 10
457 #endif
458 
459 #if PPP_SERVER
460 /**
461  * CHAP_DEFRECHALLENGETIME: If this option is > 0, re-challenge the peer every n seconds
462  */
463 #ifndef CHAP_DEFRECHALLENGETIME
464 #define CHAP_DEFRECHALLENGETIME 0
465 #endif
466 #endif /* PPP_SERVER */
467 
468 /**
469  * EAP_DEFREQTIME: Time to wait for peer request
470  */
471 #ifndef EAP_DEFREQTIME
472 #define EAP_DEFREQTIME 6
473 #endif
474 
475 /**
476  * EAP_DEFALLOWREQ: max # times to accept requests
477  */
478 #ifndef EAP_DEFALLOWREQ
479 #define EAP_DEFALLOWREQ 10
480 #endif
481 
482 #if PPP_SERVER
483 /**
484  * EAP_DEFTIMEOUT: Timeout (seconds) for rexmit
485  */
486 #ifndef EAP_DEFTIMEOUT
487 #define EAP_DEFTIMEOUT 6
488 #endif
489 
490 /**
491  * EAP_DEFTRANSMITS: max # times to transmit
492  */
493 #ifndef EAP_DEFTRANSMITS
494 #define EAP_DEFTRANSMITS 10
495 #endif
496 #endif /* PPP_SERVER */
497 
498 /**
499  * LCP_DEFLOOPBACKFAIL: Default number of times we receive our magic number from the peer
500  * before deciding the link is looped-back.
501  */
502 #ifndef LCP_DEFLOOPBACKFAIL
503 #define LCP_DEFLOOPBACKFAIL 10
504 #endif
505 
506 /**
507  * LCP_ECHOINTERVAL: Interval in seconds between keepalive echo requests, 0 to disable.
508  */
509 #ifndef LCP_ECHOINTERVAL
510 #define LCP_ECHOINTERVAL 0
511 #endif
512 
513 /**
514  * LCP_MAXECHOFAILS: Number of unanswered echo requests before failure.
515  */
516 #ifndef LCP_MAXECHOFAILS
517 #define LCP_MAXECHOFAILS 3
518 #endif
519 
520 /**
521  * PPP_MAXIDLEFLAG: Max Xmit idle time (in ms) before resend flag char.
522  */
523 #ifndef PPP_MAXIDLEFLAG
524 #define PPP_MAXIDLEFLAG 100
525 #endif
526 
527 /**
528  * PPP Packet sizes
529  */
530 
531 /**
532  * PPP_MRU: Default MRU
533  */
534 #ifndef PPP_MRU
535 #define PPP_MRU 1500
536 #endif
537 
538 /**
539  * PPP_DEFMRU: Default MRU to try
540  */
541 #ifndef PPP_DEFMRU
542 #define PPP_DEFMRU 1500
543 #endif
544 
545 /**
546  * PPP_MAXMRU: Normally limit MRU to this (pppd default = 16384)
547  */
548 #ifndef PPP_MAXMRU
549 #define PPP_MAXMRU 1500
550 #endif
551 
552 /**
553  * PPP_MINMRU: No MRUs below this
554  */
555 #ifndef PPP_MINMRU
556 #define PPP_MINMRU 128
557 #endif
558 
559 /**
560  * PPPOL2TP_DEFMRU: Default MTU and MRU for L2TP
561  * Default = 1500 - PPPoE(6) - PPP Protocol(2) - IPv4 header(20) - UDP Header(8)
562  * - L2TP Header(6) - HDLC Header(2) - PPP Protocol(2) - MPPE Header(2) - PPP Protocol(2)
563  */
564 #if PPPOL2TP_SUPPORT
565 #ifndef PPPOL2TP_DEFMRU
566 #define PPPOL2TP_DEFMRU 1450
567 #endif
568 #endif /* PPPOL2TP_SUPPORT */
569 
570 /**
571  * MAXNAMELEN: max length of hostname or name for auth
572  */
573 #ifndef MAXNAMELEN
574 #define MAXNAMELEN 256
575 #endif
576 
577 /**
578  * MAXSECRETLEN: max length of password or secret
579  */
580 #ifndef MAXSECRETLEN
581 #define MAXSECRETLEN 256
582 #endif
583 
584 /* ------------------------------------------------------------------------- */
585 
586 /*
587  * Build triggers for embedded PolarSSL
588  */
589 
590 /* CHAP, EAP, L2TP AUTH and MD5 Random require MD5 support */
591 #if CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT || PPP_MD5_RANDM
592 #define PPP_INCLUDED_POLARSSL_MD5 1
593 #endif /* CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT || PPP_MD5_RANDM */
594 
595 #if MSCHAP_SUPPORT
596 
597 /* MSCHAP require MD4 support */
598 #define PPP_INCLUDED_POLARSSL_MD4 1
599 /* MSCHAP require SHA1 support */
600 #define PPP_INCLUDED_POLARSSL_SHA1 1
601 /* MSCHAP require DES support */
602 #define PPP_INCLUDED_POLARSSL_DES 1
603 
604 /* MS-CHAP support is required for MPPE */
605 #if MPPE_SUPPORT
606 /* MPPE require ARC4 support */
607 #define PPP_INCLUDED_POLARSSL_ARC4 1
608 #endif /* MPPE_SUPPORT */
609 
610 #endif /* MSCHAP_SUPPORT */
611 
612 /* Default value if unset */
613 #ifndef PPP_INCLUDED_POLARSSL_MD4
614 #define PPP_INCLUDED_POLARSSL_MD4 0
615 #endif /* PPP_INCLUDED_POLARSSL_MD4 */
616 #ifndef PPP_INCLUDED_POLARSSL_MD5
617 #define PPP_INCLUDED_POLARSSL_MD5 0
618 #endif /* PPP_INCLUDED_POLARSSL_MD5 */
619 #ifndef PPP_INCLUDED_POLARSSL_SHA1
620 #define PPP_INCLUDED_POLARSSL_SHA1 0
621 #endif /* PPP_INCLUDED_POLARSSL_SHA1 */
622 #ifndef PPP_INCLUDED_POLARSSL_DES
623 #define PPP_INCLUDED_POLARSSL_DES 0
624 #endif /* PPP_INCLUDED_POLARSSL_DES */
625 #ifndef PPP_INCLUDED_POLARSSL_ARC4
626 #define PPP_INCLUDED_POLARSSL_ARC4 0
627 #endif /* PPP_INCLUDED_POLARSSL_ARC4 */
628 
629 #endif /* PPP_SUPPORT */
630 
631 /* Default value if unset */
632 #ifndef PPP_NUM_TIMEOUTS
633 #define PPP_NUM_TIMEOUTS 0
634 #endif /* PPP_NUM_TIMEOUTS */
635 
636 #endif /* PPP_OPTS_H */
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.