Keil Studio Cloud
Mistake on this page?
Report an issue in GitHub or email us
ppp.h
1 /*****************************************************************************
2 * /@code
3 *
4 * ppp.h - Network Point to Point Protocol header file.
5 *
6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
7 * portions Copyright (c) 1997 Global Election Systems Inc.
8 *
9 * The authors hereby grant permission to use, copy, modify, distribute,
10 * and license this software and its documentation for any purpose, provided
11 * that existing copyright notices are retained in all copies and that this
12 * notice and the following disclaimer are included verbatim in any
13 * distributions. No written agreement, license, or royalty fee is required
14 * for any of the authorized uses.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 ******************************************************************************
28 * REVISION HISTORY
29 *
30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
31 * Ported to lwIP.
32 * 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
33 * Original derived from BSD codes.
34 *
35 * /@endcode
36 *****************************************************************************/
37 
38 #include "ppp_opts.h"
39 #if PPP_SUPPORT /* don't build if not configured for use in ppp_opts.h */
40 
41 #ifndef PPP_H
42 #define PPP_H
43 
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47 
48 /* Disable non-working or rarely used PPP feature, so rarely that we don't want to bloat ppp_opts.h with them */
49 #ifndef PPP_OPTIONS
50 #define PPP_OPTIONS 0
51 #endif
52 
53 #ifndef PPP_NOTIFY
54 #define PPP_NOTIFY 0
55 #endif
56 
57 #ifndef PPP_REMOTENAME
58 #define PPP_REMOTENAME 0
59 #endif
60 
61 #ifndef PPP_IDLETIMELIMIT
62 #define PPP_IDLETIMELIMIT 0
63 #endif
64 
65 #ifndef PPP_LCP_ADAPTIVE
66 #define PPP_LCP_ADAPTIVE 0
67 #endif
68 
69 #ifndef PPP_MAXCONNECT
70 #define PPP_MAXCONNECT 0
71 #endif
72 
73 #ifndef PPP_ALLOWED_ADDRS
74 #define PPP_ALLOWED_ADDRS 0
75 #endif
76 
77 #ifndef PPP_PROTOCOLNAME
78 #define PPP_PROTOCOLNAME 0
79 #endif
80 
81 #ifndef PPP_STATS_SUPPORT
82 #define PPP_STATS_SUPPORT 0
83 #endif
84 
85 #ifndef DEFLATE_SUPPORT
86 #define DEFLATE_SUPPORT 0
87 #endif
88 
89 #ifndef BSDCOMPRESS_SUPPORT
90 #define BSDCOMPRESS_SUPPORT 0
91 #endif
92 
93 #ifndef PREDICTOR_SUPPORT
94 #define PREDICTOR_SUPPORT 0
95 #endif
96 
97 /*************************
98 *** PUBLIC DEFINITIONS ***
99 *************************/
100 
101 /*
102  * The basic PPP frame.
103  */
104 #define PPP_HDRLEN 4 /* octets for standard ppp header */
105 #define PPP_FCSLEN 2 /* octets for FCS */
106 
107 /*
108  * Values for phase.
109  */
110 #define PPP_PHASE_DEAD 0
111 #define PPP_PHASE_MASTER 1
112 #define PPP_PHASE_HOLDOFF 2
113 #define PPP_PHASE_INITIALIZE 3
114 #define PPP_PHASE_SERIALCONN 4
115 #define PPP_PHASE_DORMANT 5
116 #define PPP_PHASE_ESTABLISH 6
117 #define PPP_PHASE_AUTHENTICATE 7
118 #define PPP_PHASE_CALLBACK 8
119 #define PPP_PHASE_NETWORK 9
120 #define PPP_PHASE_RUNNING 10
121 #define PPP_PHASE_TERMINATE 11
122 #define PPP_PHASE_DISCONNECT 12
123 
124 /* Error codes. */
125 #define PPPERR_NONE 0 /* No error. */
126 #define PPPERR_PARAM 1 /* Invalid parameter. */
127 #define PPPERR_OPEN 2 /* Unable to open PPP session. */
128 #define PPPERR_DEVICE 3 /* Invalid I/O device for PPP. */
129 #define PPPERR_ALLOC 4 /* Unable to allocate resources. */
130 #define PPPERR_USER 5 /* User interrupt. */
131 #define PPPERR_CONNECT 6 /* Connection lost. */
132 #define PPPERR_AUTHFAIL 7 /* Failed authentication challenge. */
133 #define PPPERR_PROTOCOL 8 /* Failed to meet protocol. */
134 #define PPPERR_PEERDEAD 9 /* Connection timeout */
135 #define PPPERR_IDLETIMEOUT 10 /* Idle Timeout */
136 #define PPPERR_CONNECTTIME 11 /* Max connect time reached */
137 #define PPPERR_LOOPBACK 12 /* Loopback detected */
138 
139 /* Whether auth support is enabled at all */
140 #define PPP_AUTH_SUPPORT (PAP_SUPPORT || CHAP_SUPPORT || EAP_SUPPORT)
141 
142 /************************
143 *** PUBLIC DATA TYPES ***
144 ************************/
145 
146 /*
147  * Other headers require ppp_pcb definition for prototypes, but ppp_pcb
148  * require some structure definition from other headers as well, we are
149  * fixing the dependency loop here by declaring the ppp_pcb type then
150  * by including headers containing necessary struct definition for ppp_pcb
151  */
152 typedef struct ppp_pcb_s ppp_pcb;
153 
154 /* Type definitions for BSD code. */
155 #ifndef __u_char_defined
156 typedef unsigned long u_long;
157 typedef unsigned int u_int;
158 typedef unsigned short u_short;
159 typedef unsigned char u_char;
160 #endif
161 
162 #include "fsm.h"
163 #include "lcp.h"
164 #if CCP_SUPPORT
165 #include "ccp.h"
166 #endif /* CCP_SUPPORT */
167 #if MPPE_SUPPORT
168 #include "mppe.h"
169 #endif /* MPPE_SUPPORT */
170 #if PPP_IPV4_SUPPORT
171 #include "ipcp.h"
172 #endif /* PPP_IPV4_SUPPORT */
173 #if PPP_IPV6_SUPPORT
174 #include "ipv6cp.h"
175 #endif /* PPP_IPV6_SUPPORT */
176 #if PAP_SUPPORT
177 #include "upap.h"
178 #endif /* PAP_SUPPORT */
179 #if CHAP_SUPPORT
180 #include "chap-new.h"
181 #endif /* CHAP_SUPPORT */
182 #if EAP_SUPPORT
183 #include "eap.h"
184 #endif /* EAP_SUPPORT */
185 #if VJ_SUPPORT
186 #include "vj.h"
187 #endif /* VJ_SUPPORT */
188 
189 /* Link status callback function prototype */
190 typedef void (*ppp_link_status_cb_fn)(ppp_pcb *pcb, int err_code, void *ctx);
191 
192 /*
193  * PPP configuration.
194  */
195 typedef struct ppp_settings_s {
196 
197 #if PPP_SERVER && PPP_AUTH_SUPPORT
198  unsigned int auth_required :1; /* Peer is required to authenticate */
199  unsigned int null_login :1; /* Username of "" and a password of "" are acceptable */
200 #endif /* PPP_SERVER && PPP_AUTH_SUPPORT */
201 #if PPP_REMOTENAME
202  unsigned int explicit_remote :1; /* remote_name specified with remotename opt */
203 #endif /* PPP_REMOTENAME */
204 #if PAP_SUPPORT
205  unsigned int refuse_pap :1; /* Don't proceed auth. with PAP */
206 #endif /* PAP_SUPPORT */
207 #if CHAP_SUPPORT
208  unsigned int refuse_chap :1; /* Don't proceed auth. with CHAP */
209 #endif /* CHAP_SUPPORT */
210 #if MSCHAP_SUPPORT
211  unsigned int refuse_mschap :1; /* Don't proceed auth. with MS-CHAP */
212  unsigned int refuse_mschap_v2 :1; /* Don't proceed auth. with MS-CHAPv2 */
213 #endif /* MSCHAP_SUPPORT */
214 #if EAP_SUPPORT
215  unsigned int refuse_eap :1; /* Don't proceed auth. with EAP */
216 #endif /* EAP_SUPPORT */
217 #if PPP_DNS
218  unsigned int usepeerdns :1; /* Ask peer for DNS adds */
219 #endif /* PPP_DNS */
220  unsigned int persist :1; /* Persist mode, always try to open the connection */
221 #if PRINTPKT_SUPPORT
222  unsigned int hide_password :1; /* Hide password in dumped packets */
223 #endif /* PRINTPKT_SUPPORT */
224  unsigned int noremoteip :1; /* Let him have no IP address */
225  unsigned int lax_recv :1; /* accept control chars in asyncmap */
226  unsigned int noendpoint :1; /* don't send/accept endpoint discriminator */
227 #if PPP_LCP_ADAPTIVE
228  unsigned int lcp_echo_adaptive :1; /* request echo only if the link was idle */
229 #endif /* PPP_LCP_ADAPTIVE */
230 #if MPPE_SUPPORT
231  unsigned int require_mppe :1; /* Require MPPE (Microsoft Point to Point Encryption) */
232  unsigned int refuse_mppe_40 :1; /* Allow MPPE 40-bit mode? */
233  unsigned int refuse_mppe_128 :1; /* Allow MPPE 128-bit mode? */
234  unsigned int refuse_mppe_stateful :1; /* Allow MPPE stateful mode? */
235 #endif /* MPPE_SUPPORT */
236 
237  u16_t listen_time; /* time to listen first (ms), waiting for peer to send LCP packet */
238 
239 #if PPP_IDLETIMELIMIT
240  u16_t idle_time_limit; /* Disconnect if idle for this many seconds */
241 #endif /* PPP_IDLETIMELIMIT */
242 #if PPP_MAXCONNECT
243  u32_t maxconnect; /* Maximum connect time (seconds) */
244 #endif /* PPP_MAXCONNECT */
245 
246 #if PPP_AUTH_SUPPORT
247  /* auth data */
248  const char *user; /* Username for PAP */
249  const char *passwd; /* Password for PAP, secret for CHAP */
250 #if PPP_REMOTENAME
251  char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */
252 #endif /* PPP_REMOTENAME */
253 
254 #if PAP_SUPPORT
255  u8_t pap_timeout_time; /* Timeout (seconds) for auth-req retrans. */
256  u8_t pap_max_transmits; /* Number of auth-reqs sent */
257 #if PPP_SERVER
258  u8_t pap_req_timeout; /* Time to wait for auth-req from peer */
259 #endif /* PPP_SERVER */
260 #endif /* PAP_SUPPPORT */
261 
262 #if CHAP_SUPPORT
263  u8_t chap_timeout_time; /* Timeout (seconds) for retransmitting req */
264  u8_t chap_max_transmits; /* max # times to send challenge */
265 #if PPP_SERVER
266  u8_t chap_rechallenge_time; /* Time to wait for auth-req from peer */
267 #endif /* PPP_SERVER */
268 #endif /* CHAP_SUPPPORT */
269 
270 #if EAP_SUPPORT
271  u8_t eap_req_time; /* Time to wait (for retransmit/fail) */
272  u8_t eap_allow_req; /* Max Requests allowed */
273 #if PPP_SERVER
274  u8_t eap_timeout_time; /* Time to wait (for retransmit/fail) */
275  u8_t eap_max_transmits; /* Max Requests allowed */
276 #endif /* PPP_SERVER */
277 #endif /* EAP_SUPPORT */
278 
279 #endif /* PPP_AUTH_SUPPORT */
280 
281  u8_t fsm_timeout_time; /* Timeout time in seconds */
282  u8_t fsm_max_conf_req_transmits; /* Maximum Configure-Request transmissions */
283  u8_t fsm_max_term_transmits; /* Maximum Terminate-Request transmissions */
284  u8_t fsm_max_nak_loops; /* Maximum number of nak loops tolerated */
285 
286  u8_t lcp_loopbackfail; /* Number of times we receive our magic number from the peer
287  before deciding the link is looped-back. */
288  u8_t lcp_echo_interval; /* Interval between LCP echo-requests */
289  u8_t lcp_echo_fails; /* Tolerance to unanswered echo-requests */
290 
291 } ppp_settings;
292 
293 #if PPP_SERVER
294 struct ppp_addrs {
295 #if PPP_IPV4_SUPPORT
296  ip4_addr_t our_ipaddr, his_ipaddr, netmask;
297 #if PPP_DNS
298  ip4_addr_t dns1, dns2;
299 #endif /* PPP_DNS */
300 #endif /* PPP_IPV4_SUPPORT */
301 #if PPP_IPV6_SUPPORT
302  ip6_addr_t our6_ipaddr, his6_ipaddr;
303 #endif /* PPP_IPV6_SUPPORT */
304 };
305 #endif /* PPP_SERVER */
306 
307 /*
308  * PPP interface control block.
309  */
310 struct ppp_pcb_s {
311  ppp_settings settings;
312  const struct link_callbacks *link_cb;
313  void *link_ctx_cb;
314  void (*link_status_cb)(ppp_pcb *pcb, int err_code, void *ctx); /* Status change callback */
315 #if PPP_NOTIFY_PHASE
316  void (*notify_phase_cb)(ppp_pcb *pcb, u8_t phase, void *ctx); /* Notify phase callback */
317 #endif /* PPP_NOTIFY_PHASE */
318  void *ctx_cb; /* Callbacks optional pointer */
319  struct netif *netif; /* PPP interface */
320  u8_t phase; /* where the link is at */
321  u8_t err_code; /* Code indicating why interface is down. */
322 
323  /* flags */
324 #if PPP_IPV4_SUPPORT
325  unsigned int ask_for_local :1; /* request our address from peer */
326  unsigned int ipcp_is_open :1; /* haven't called np_finished() */
327  unsigned int ipcp_is_up :1; /* have called ipcp_up() */
328  unsigned int if4_up :1; /* True when the IPv4 interface is up. */
329 #if 0 /* UNUSED - PROXY ARP */
330  unsigned int proxy_arp_set :1; /* Have created proxy arp entry */
331 #endif /* UNUSED - PROXY ARP */
332 #endif /* PPP_IPV4_SUPPORT */
333 #if PPP_IPV6_SUPPORT
334  unsigned int ipv6cp_is_up :1; /* have called ip6cp_up() */
335  unsigned int if6_up :1; /* True when the IPv6 interface is up. */
336 #endif /* PPP_IPV6_SUPPORT */
337 #if PPP_IPV4_SUPPORT && PPP_IPV6_SUPPORT
338  unsigned int ipcp_disabled :1; /* disable ipcp */
339  unsigned int ipv6cp_disabled :1; /* disable ipv6cp */
340 #endif
341  unsigned int lcp_echo_timer_running :1; /* set if a timer is running */
342 #if VJ_SUPPORT
343  unsigned int vj_enabled :1; /* Flag indicating VJ compression enabled. */
344 #endif /* VJ_SUPPORT */
345 #if CCP_SUPPORT
346  unsigned int ccp_all_rejected :1; /* we rejected all peer's options */
347 #endif /* CCP_SUPPORT */
348 #if MPPE_SUPPORT
349  unsigned int mppe_keys_set :1; /* Have the MPPE keys been set? */
350 #endif /* MPPE_SUPPORT */
351 
352 #if PPP_AUTH_SUPPORT
353  /* auth data */
354 #if PPP_SERVER && defined(HAVE_MULTILINK)
355  char peer_authname[MAXNAMELEN + 1]; /* The name by which the peer authenticated itself to us. */
356 #endif /* PPP_SERVER && defined(HAVE_MULTILINK) */
357  u16_t auth_pending; /* Records which authentication operations haven't completed yet. */
358  u16_t auth_done; /* Records which authentication operations have been completed. */
359 
360 #if PAP_SUPPORT
361  upap_state upap; /* PAP data */
362 #endif /* PAP_SUPPORT */
363 
364 #if CHAP_SUPPORT
365  chap_client_state chap_client; /* CHAP client data */
366 #if PPP_SERVER
367  chap_server_state chap_server; /* CHAP server data */
368 #endif /* PPP_SERVER */
369 #endif /* CHAP_SUPPORT */
370 
371 #if EAP_SUPPORT
372  eap_state eap; /* EAP data */
373 #endif /* EAP_SUPPORT */
374 #endif /* PPP_AUTH_SUPPORT */
375 
376  fsm lcp_fsm; /* LCP fsm structure */
377  lcp_options lcp_wantoptions; /* Options that we want to request */
378  lcp_options lcp_gotoptions; /* Options that peer ack'd */
379  lcp_options lcp_allowoptions; /* Options we allow peer to request */
380  lcp_options lcp_hisoptions; /* Options that we ack'd */
381  u16_t peer_mru; /* currently negotiated peer MRU */
382  u8_t lcp_echos_pending; /* Number of outstanding echo msgs */
383  u8_t lcp_echo_number; /* ID number of next echo frame */
384 
385  u8_t num_np_open; /* Number of network protocols which we have opened. */
386  u8_t num_np_up; /* Number of network protocols which have come up. */
387 
388 #if VJ_SUPPORT
389  struct vjcompress vj_comp; /* Van Jacobson compression header. */
390 #endif /* VJ_SUPPORT */
391 
392 #if CCP_SUPPORT
393  fsm ccp_fsm; /* CCP fsm structure */
394  ccp_options ccp_wantoptions; /* what to request the peer to use */
395  ccp_options ccp_gotoptions; /* what the peer agreed to do */
396  ccp_options ccp_allowoptions; /* what we'll agree to do */
397  ccp_options ccp_hisoptions; /* what we agreed to do */
398  u8_t ccp_localstate; /* Local state (mainly for handling reset-reqs and reset-acks). */
399  u8_t ccp_receive_method; /* Method chosen on receive path */
400  u8_t ccp_transmit_method; /* Method chosen on transmit path */
401 #if MPPE_SUPPORT
402  ppp_mppe_state mppe_comp; /* MPPE "compressor" structure */
403  ppp_mppe_state mppe_decomp; /* MPPE "decompressor" structure */
404 #endif /* MPPE_SUPPORT */
405 #endif /* CCP_SUPPORT */
406 
407 #if PPP_IPV4_SUPPORT
408  fsm ipcp_fsm; /* IPCP fsm structure */
409  ipcp_options ipcp_wantoptions; /* Options that we want to request */
410  ipcp_options ipcp_gotoptions; /* Options that peer ack'd */
411  ipcp_options ipcp_allowoptions; /* Options we allow peer to request */
412  ipcp_options ipcp_hisoptions; /* Options that we ack'd */
413 #endif /* PPP_IPV4_SUPPORT */
414 
415 #if PPP_IPV6_SUPPORT
416  fsm ipv6cp_fsm; /* IPV6CP fsm structure */
417  ipv6cp_options ipv6cp_wantoptions; /* Options that we want to request */
418  ipv6cp_options ipv6cp_gotoptions; /* Options that peer ack'd */
419  ipv6cp_options ipv6cp_allowoptions; /* Options we allow peer to request */
420  ipv6cp_options ipv6cp_hisoptions; /* Options that we ack'd */
421 #endif /* PPP_IPV6_SUPPORT */
422 };
423 
424 /************************
425  *** PUBLIC FUNCTIONS ***
426  ************************/
427 
428 /*
429  * WARNING: For multi-threads environment, all ppp_set_* functions most
430  * only be called while the PPP is in the dead phase (i.e. disconnected).
431  */
432 
433 #if PPP_AUTH_SUPPORT
434 /*
435  * Set PPP authentication.
436  *
437  * Warning: Using PPPAUTHTYPE_ANY might have security consequences.
438  * RFC 1994 says:
439  *
440  * In practice, within or associated with each PPP server, there is a
441  * database which associates "user" names with authentication
442  * information ("secrets"). It is not anticipated that a particular
443  * named user would be authenticated by multiple methods. This would
444  * make the user vulnerable to attacks which negotiate the least secure
445  * method from among a set (such as PAP rather than CHAP). If the same
446  * secret was used, PAP would reveal the secret to be used later with
447  * CHAP.
448  *
449  * Instead, for each user name there should be an indication of exactly
450  * one method used to authenticate that user name. If a user needs to
451  * make use of different authentication methods under different
452  * circumstances, then distinct user names SHOULD be employed, each of
453  * which identifies exactly one authentication method.
454  *
455  * Default is none auth type, unset (NULL) user and passwd.
456  */
457 #define PPPAUTHTYPE_NONE 0x00
458 #define PPPAUTHTYPE_PAP 0x01
459 #define PPPAUTHTYPE_CHAP 0x02
460 #define PPPAUTHTYPE_MSCHAP 0x04
461 #define PPPAUTHTYPE_MSCHAP_V2 0x08
462 #define PPPAUTHTYPE_EAP 0x10
463 #define PPPAUTHTYPE_ANY 0xff
464 void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd);
465 
466 /*
467  * If set, peer is required to authenticate. This is mostly necessary for PPP server support.
468  *
469  * Default is false.
470  */
471 #define ppp_set_auth_required(ppp, boolval) (ppp->settings.auth_required = boolval)
472 #endif /* PPP_AUTH_SUPPORT */
473 
474 #if PPP_IPV4_SUPPORT
475 /*
476  * Set PPP interface "our" and "his" IPv4 addresses. This is mostly necessary for PPP server
477  * support but it can also be used on a PPP link where each side choose its own IP address.
478  *
479  * Default is unset (0.0.0.0).
480  */
481 #define ppp_set_ipcp_ouraddr(ppp, addr) do { ppp->ipcp_wantoptions.ouraddr = ip4_addr_get_u32(addr); \
482  ppp->ask_for_local = ppp->ipcp_wantoptions.ouraddr != 0; } while(0)
483 #define ppp_set_ipcp_hisaddr(ppp, addr) (ppp->ipcp_wantoptions.hisaddr = ip4_addr_get_u32(addr))
484 #if PPP_DNS
485 /*
486  * Set DNS server addresses that are sent if the peer asks for them. This is mostly necessary
487  * for PPP server support.
488  *
489  * Default is unset (0.0.0.0).
490  */
491 #define ppp_set_ipcp_dnsaddr(ppp, index, addr) (ppp->ipcp_allowoptions.dnsaddr[index] = ip4_addr_get_u32(addr))
492 
493 /*
494  * If set, we ask the peer for up to 2 DNS server addresses. Received DNS server addresses are
495  * registered using the dns_setserver() function.
496  *
497  * Default is false.
498  */
499 #define ppp_set_usepeerdns(ppp, boolval) (ppp->settings.usepeerdns = boolval)
500 #endif /* PPP_DNS */
501 #endif /* PPP_IPV4_SUPPORT */
502 
503 #if MPPE_SUPPORT
504 /* Disable MPPE (Microsoft Point to Point Encryption). This parameter is exclusive. */
505 #define PPP_MPPE_DISABLE 0x00
506 /* Require the use of MPPE (Microsoft Point to Point Encryption). */
507 #define PPP_MPPE_ENABLE 0x01
508 /* Allow MPPE to use stateful mode. Stateless mode is still attempted first. */
509 #define PPP_MPPE_ALLOW_STATEFUL 0x02
510 /* Refuse the use of MPPE with 40-bit encryption. Conflict with PPP_MPPE_REFUSE_128. */
511 #define PPP_MPPE_REFUSE_40 0x04
512 /* Refuse the use of MPPE with 128-bit encryption. Conflict with PPP_MPPE_REFUSE_40. */
513 #define PPP_MPPE_REFUSE_128 0x08
514 /*
515  * Set MPPE configuration
516  *
517  * Default is disabled.
518  */
519 void ppp_set_mppe(ppp_pcb *pcb, u8_t flags);
520 #endif /* MPPE_SUPPORT */
521 
522 /*
523  * Wait for up to intval milliseconds for a valid PPP packet from the peer.
524  * At the end of this time, or when a valid PPP packet is received from the
525  * peer, we commence negotiation by sending our first LCP packet.
526  *
527  * Default is 0.
528  */
529 #define ppp_set_listen_time(ppp, intval) (ppp->settings.listen_time = intval)
530 
531 /*
532  * If set, we will attempt to initiate a connection but if no reply is received from
533  * the peer, we will then just wait passively for a valid LCP packet from the peer.
534  *
535  * Default is false.
536  */
537 #define ppp_set_passive(ppp, boolval) (ppp->lcp_wantoptions.passive = boolval)
538 
539 /*
540  * If set, we will not transmit LCP packets to initiate a connection until a valid
541  * LCP packet is received from the peer. This is what we usually call the server mode.
542  *
543  * Default is false.
544  */
545 #define ppp_set_silent(ppp, boolval) (ppp->lcp_wantoptions.silent = boolval)
546 
547 /*
548  * If set, enable protocol field compression negotiation in both the receive and
549  * the transmit direction.
550  *
551  * Default is true.
552  */
553 #define ppp_set_neg_pcomp(ppp, boolval) (ppp->lcp_wantoptions.neg_pcompression = \
554  ppp->lcp_allowoptions.neg_pcompression = boolval)
555 
556 /*
557  * If set, enable Address/Control compression in both the receive and the transmit
558  * direction.
559  *
560  * Default is true.
561  */
562 #define ppp_set_neg_accomp(ppp, boolval) (ppp->lcp_wantoptions.neg_accompression = \
563  ppp->lcp_allowoptions.neg_accompression = boolval)
564 
565 /*
566  * If set, enable asyncmap negotiation. Otherwise forcing all control characters to
567  * be escaped for both the transmit and the receive direction.
568  *
569  * Default is true.
570  */
571 #define ppp_set_neg_asyncmap(ppp, boolval) (ppp->lcp_wantoptions.neg_asyncmap = \
572  ppp->lcp_allowoptions.neg_asyncmap = boolval)
573 
574 /*
575  * This option sets the Async-Control-Character-Map (ACCM) for this end of the link.
576  * The ACCM is a set of 32 bits, one for each of the ASCII control characters with
577  * values from 0 to 31, where a 1 bit indicates that the corresponding control
578  * character should not be used in PPP packets sent to this system. The map is
579  * an unsigned 32 bits integer where the least significant bit (00000001) represents
580  * character 0 and the most significant bit (80000000) represents character 31.
581  * We will then ask the peer to send these characters as a 2-byte escape sequence.
582  *
583  * Default is 0.
584  */
585 #define ppp_set_asyncmap(ppp, intval) (ppp->lcp_wantoptions.asyncmap = intval)
586 
587 /*
588  * Set a PPP interface as the default network interface
589  * (used to output all packets for which no specific route is found).
590  */
591 #define ppp_set_default(ppp) netif_set_default(ppp->netif)
592 
593 #if PPP_NOTIFY_PHASE
594 /*
595  * Set a PPP notify phase callback.
596  *
597  * This can be used for example to set a LED pattern depending on the
598  * current phase of the PPP session.
599  */
600 typedef void (*ppp_notify_phase_cb_fn)(ppp_pcb *pcb, u8_t phase, void *ctx);
601 void ppp_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb);
602 #endif /* PPP_NOTIFY_PHASE */
603 
604 /*
605  * Initiate a PPP connection.
606  *
607  * This can only be called if PPP is in the dead phase.
608  *
609  * Holdoff is the time to wait (in seconds) before initiating
610  * the connection.
611  *
612  * If this port connects to a modem, the modem connection must be
613  * established before calling this.
614  */
615 err_t ppp_connect(ppp_pcb *pcb, u16_t holdoff);
616 
617 #if PPP_SERVER
618 /*
619  * Listen for an incoming PPP connection.
620  *
621  * This can only be called if PPP is in the dead phase.
622  *
623  * If this port connects to a modem, the modem connection must be
624  * established before calling this.
625  */
626 err_t ppp_listen(ppp_pcb *pcb);
627 #endif /* PPP_SERVER */
628 
629 /*
630  * Initiate the end of a PPP connection.
631  * Any outstanding packets in the queues are dropped.
632  *
633  * Setting nocarrier to 1 close the PPP connection without initiating the
634  * shutdown procedure. Always using nocarrier = 0 is still recommended,
635  * this is going to take a little longer time if your link is down, but
636  * is a safer choice for the PPP state machine.
637  *
638  * Return 0 on success, an error code on failure.
639  */
640 err_t ppp_close(ppp_pcb *pcb, u8_t nocarrier);
641 
642 /*
643  * Release the control block.
644  *
645  * This can only be called if PPP is in the dead phase.
646  *
647  * You must use ppp_close() before if you wish to terminate
648  * an established PPP session.
649  *
650  * Return 0 on success, an error code on failure.
651  */
652 err_t ppp_free(ppp_pcb *pcb);
653 
654 /*
655  * PPP IOCTL commands.
656  *
657  * Get the up status - 0 for down, non-zero for up. The argument must
658  * point to an int.
659  */
660 #define PPPCTLG_UPSTATUS 0
661 
662 /*
663  * Get the PPP error code. The argument must point to an int.
664  * Returns a PPPERR_* value.
665  */
666 #define PPPCTLG_ERRCODE 1
667 
668 /*
669  * Get the fd associated with a PPP over serial
670  */
671 #define PPPCTLG_FD 2
672 
673 /*
674  * Get and set parameters for the given connection.
675  * Return 0 on success, an error code on failure.
676  */
677 err_t ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg);
678 
679 /* Get the PPP netif interface */
680 #define ppp_netif(ppp) (ppp->netif)
681 
682 /* Set a status-callback for the selected PPP device */
683 #define ppp_set_netif_statuscallback(ppp, status_cb) \
684  netif_set_status_callback(ppp->netif, status_cb);
685 
686 /* Set a link-callback for the selected PPP device */
687 #define ppp_set_netif_linkcallback(ppp, link_cb) \
688  netif_set_link_callback(ppp->netif, link_cb);
689 
690 #ifdef __cplusplus
691 }
692 #endif
693 
694 #endif /* PPP_H */
695 
696 #endif /* PPP_SUPPORT */
netif
Generic data structure used for all lwIP network interfaces.
Definition: ppp_service_if.h:157
nsapi_addr
IP address structure for passing IP addresses by value.
Definition: nsapi_types.h:235
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.