1 /***************************************************************************** 2 * ppp.h - Network Point to Point Protocol header file. 3 * 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. 5 * portions Copyright (c) 1997 Global Election Systems Inc. 6 * 7 * The authors hereby grant permission to use, copy, modify, distribute, 8 * and license this software and its documentation for any purpose, provided 9 * that existing copyright notices are retained in all copies and that this 10 * notice and the following disclaimer are included verbatim in any 11 * distributions. No written agreement, license, or royalty fee is required 12 * for any of the authorized uses. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 ****************************************************************************** 26 * REVISION HISTORY 27 * 28 * 03-01-01 Marc Boucher <marc@mbsi.ca> 29 * Ported to lwIP. 30 * 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. 31 * Original derived from BSD codes. 32 *****************************************************************************/ 33 34 #include "netif/ppp/ppp_opts.h" 35 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ 36 37 #ifndef PPP_H 38 #define PPP_H 39 40 #include "lwip/def.h" 41 #include "lwip/stats.h" 42 #include "lwip/mem.h" 43 #include "lwip/netif.h" 44 #include "lwip/sys.h" 45 #include "lwip/timeouts.h" 46 #if PPP_IPV6_SUPPORT 47 #include "lwip/ip6_addr.h" 48 #endif /* PPP_IPV6_SUPPORT */ 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 /* Disable non-working or rarely used PPP feature, so rarely that we don't want to bloat ppp_opts.h with them */ 55 #ifndef PPP_OPTIONS 56 #define PPP_OPTIONS 0 57 #endif 58 59 #ifndef PPP_NOTIFY 60 #define PPP_NOTIFY 0 61 #endif 62 63 #ifndef PPP_REMOTENAME 64 #define PPP_REMOTENAME 0 65 #endif 66 67 #ifndef PPP_IDLETIMELIMIT 68 #define PPP_IDLETIMELIMIT 0 69 #endif 70 71 #ifndef PPP_LCP_ADAPTIVE 72 #define PPP_LCP_ADAPTIVE 0 73 #endif 74 75 #ifndef PPP_MAXCONNECT 76 #define PPP_MAXCONNECT 0 77 #endif 78 79 #ifndef PPP_ALLOWED_ADDRS 80 #define PPP_ALLOWED_ADDRS 0 81 #endif 82 83 #ifndef PPP_PROTOCOLNAME 84 #define PPP_PROTOCOLNAME 0 85 #endif 86 87 #ifndef PPP_STATS_SUPPORT 88 #define PPP_STATS_SUPPORT 0 89 #endif 90 91 #ifndef DEFLATE_SUPPORT 92 #define DEFLATE_SUPPORT 0 93 #endif 94 95 #ifndef BSDCOMPRESS_SUPPORT 96 #define BSDCOMPRESS_SUPPORT 0 97 #endif 98 99 #ifndef PREDICTOR_SUPPORT 100 #define PREDICTOR_SUPPORT 0 101 #endif 102 103 /************************* 104 *** PUBLIC DEFINITIONS *** 105 *************************/ 106 107 /* 108 * The basic PPP frame. 109 */ 110 #define PPP_HDRLEN 4 /* octets for standard ppp header */ 111 #define PPP_FCSLEN 2 /* octets for FCS */ 112 113 /* 114 * Values for phase. 115 */ 116 #define PPP_PHASE_DEAD 0 117 #define PPP_PHASE_MASTER 1 118 #define PPP_PHASE_HOLDOFF 2 119 #define PPP_PHASE_INITIALIZE 3 120 #define PPP_PHASE_SERIALCONN 4 121 #define PPP_PHASE_DORMANT 5 122 #define PPP_PHASE_ESTABLISH 6 123 #define PPP_PHASE_AUTHENTICATE 7 124 #define PPP_PHASE_CALLBACK 8 125 #define PPP_PHASE_NETWORK 9 126 #define PPP_PHASE_RUNNING 10 127 #define PPP_PHASE_TERMINATE 11 128 #define PPP_PHASE_DISCONNECT 12 129 130 /* Error codes. */ 131 #define PPPERR_NONE 0 /* No error. */ 132 #define PPPERR_PARAM 1 /* Invalid parameter. */ 133 #define PPPERR_OPEN 2 /* Unable to open PPP session. */ 134 #define PPPERR_DEVICE 3 /* Invalid I/O device for PPP. */ 135 #define PPPERR_ALLOC 4 /* Unable to allocate resources. */ 136 #define PPPERR_USER 5 /* User interrupt. */ 137 #define PPPERR_CONNECT 6 /* Connection lost. */ 138 #define PPPERR_AUTHFAIL 7 /* Failed authentication challenge. */ 139 #define PPPERR_PROTOCOL 8 /* Failed to meet protocol. */ 140 #define PPPERR_PEERDEAD 9 /* Connection timeout */ 141 #define PPPERR_IDLETIMEOUT 10 /* Idle Timeout */ 142 #define PPPERR_CONNECTTIME 11 /* Max connect time reached */ 143 #define PPPERR_LOOPBACK 12 /* Loopback detected */ 144 145 /* Whether auth support is enabled at all */ 146 #define PPP_AUTH_SUPPORT (PAP_SUPPORT || CHAP_SUPPORT || EAP_SUPPORT) 147 148 /************************ 149 *** PUBLIC DATA TYPES *** 150 ************************/ 151 152 /* 153 * Other headers require ppp_pcb definition for prototypes, but ppp_pcb 154 * require some structure definition from other headers as well, we are 155 * fixing the dependency loop here by declaring the ppp_pcb type then 156 * by including headers containing necessary struct definition for ppp_pcb 157 */ 158 typedef struct ppp_pcb_s ppp_pcb; 159 160 /* Type definitions for BSD code. */ 161 #ifndef __u_char_defined 162 typedef unsigned long u_long; 163 typedef unsigned int u_int; 164 typedef unsigned short u_short; 165 typedef unsigned char u_char; 166 #endif 167 168 #include "fsm.h" 169 #include "lcp.h" 170 #if CCP_SUPPORT 171 #include "ccp.h" 172 #endif /* CCP_SUPPORT */ 173 #if MPPE_SUPPORT 174 #include "mppe.h" 175 #endif /* MPPE_SUPPORT */ 176 #if PPP_IPV4_SUPPORT 177 #include "ipcp.h" 178 #endif /* PPP_IPV4_SUPPORT */ 179 #if PPP_IPV6_SUPPORT 180 #include "ipv6cp.h" 181 #endif /* PPP_IPV6_SUPPORT */ 182 #if PAP_SUPPORT 183 #include "upap.h" 184 #endif /* PAP_SUPPORT */ 185 #if CHAP_SUPPORT 186 #include "chap-new.h" 187 #endif /* CHAP_SUPPORT */ 188 #if EAP_SUPPORT 189 #include "eap.h" 190 #endif /* EAP_SUPPORT */ 191 #if VJ_SUPPORT 192 #include "vj.h" 193 #endif /* VJ_SUPPORT */ 194 195 /* Link status callback function prototype */ 196 typedef void (*ppp_link_status_cb_fn)(ppp_pcb *pcb, int err_code, void *ctx); 197 198 /* 199 * PPP configuration. 200 */ 201 typedef struct ppp_settings_s { 202 203 #if PPP_SERVER && PPP_AUTH_SUPPORT 204 unsigned int auth_required :1; /* Peer is required to authenticate */ 205 unsigned int null_login :1; /* Username of "" and a password of "" are acceptable */ 206 #endif /* PPP_SERVER && PPP_AUTH_SUPPORT */ 207 #if PPP_REMOTENAME 208 unsigned int explicit_remote :1; /* remote_name specified with remotename opt */ 209 #endif /* PPP_REMOTENAME */ 210 #if PAP_SUPPORT 211 unsigned int refuse_pap :1; /* Don't proceed auth. with PAP */ 212 #endif /* PAP_SUPPORT */ 213 #if CHAP_SUPPORT 214 unsigned int refuse_chap :1; /* Don't proceed auth. with CHAP */ 215 #endif /* CHAP_SUPPORT */ 216 #if MSCHAP_SUPPORT 217 unsigned int refuse_mschap :1; /* Don't proceed auth. with MS-CHAP */ 218 unsigned int refuse_mschap_v2 :1; /* Don't proceed auth. with MS-CHAPv2 */ 219 #endif /* MSCHAP_SUPPORT */ 220 #if EAP_SUPPORT 221 unsigned int refuse_eap :1; /* Don't proceed auth. with EAP */ 222 #endif /* EAP_SUPPORT */ 223 #if LWIP_DNS 224 unsigned int usepeerdns :1; /* Ask peer for DNS adds */ 225 #endif /* LWIP_DNS */ 226 unsigned int persist :1; /* Persist mode, always try to open the connection */ 227 #if PRINTPKT_SUPPORT 228 unsigned int hide_password :1; /* Hide password in dumped packets */ 229 #endif /* PRINTPKT_SUPPORT */ 230 unsigned int noremoteip :1; /* Let him have no IP address */ 231 unsigned int lax_recv :1; /* accept control chars in asyncmap */ 232 unsigned int noendpoint :1; /* don't send/accept endpoint discriminator */ 233 #if PPP_LCP_ADAPTIVE 234 unsigned int lcp_echo_adaptive :1; /* request echo only if the link was idle */ 235 #endif /* PPP_LCP_ADAPTIVE */ 236 #if MPPE_SUPPORT 237 unsigned int require_mppe :1; /* Require MPPE (Microsoft Point to Point Encryption) */ 238 unsigned int refuse_mppe_40 :1; /* Allow MPPE 40-bit mode? */ 239 unsigned int refuse_mppe_128 :1; /* Allow MPPE 128-bit mode? */ 240 unsigned int refuse_mppe_stateful :1; /* Allow MPPE stateful mode? */ 241 #endif /* MPPE_SUPPORT */ 242 243 u16_t listen_time; /* time to listen first (ms), waiting for peer to send LCP packet */ 244 245 #if PPP_IDLETIMELIMIT 246 u16_t idle_time_limit; /* Disconnect if idle for this many seconds */ 247 #endif /* PPP_IDLETIMELIMIT */ 248 #if PPP_MAXCONNECT 249 u32_t maxconnect; /* Maximum connect time (seconds) */ 250 #endif /* PPP_MAXCONNECT */ 251 252 #if PPP_AUTH_SUPPORT 253 /* auth data */ 254 const char *user; /* Username for PAP */ 255 const char *passwd; /* Password for PAP, secret for CHAP */ 256 #if PPP_REMOTENAME 257 char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */ 258 #endif /* PPP_REMOTENAME */ 259 260 #if PAP_SUPPORT 261 u8_t pap_timeout_time; /* Timeout (seconds) for auth-req retrans. */ 262 u8_t pap_max_transmits; /* Number of auth-reqs sent */ 263 #if PPP_SERVER 264 u8_t pap_req_timeout; /* Time to wait for auth-req from peer */ 265 #endif /* PPP_SERVER */ 266 #endif /* PAP_SUPPPORT */ 267 268 #if CHAP_SUPPORT 269 #if PPP_SERVER 270 u8_t chap_timeout_time; /* Timeout (seconds) for retransmitting req */ 271 u8_t chap_max_transmits; /* max # times to send challenge */ 272 u8_t chap_rechallenge_time; /* Time to wait for auth-req from peer */ 273 #endif /* PPP_SERVER */ 274 #endif /* CHAP_SUPPPORT */ 275 276 #if EAP_SUPPORT 277 u8_t eap_req_time; /* Time to wait (for retransmit/fail) */ 278 u8_t eap_allow_req; /* Max Requests allowed */ 279 #if PPP_SERVER 280 u8_t eap_timeout_time; /* Time to wait (for retransmit/fail) */ 281 u8_t eap_max_transmits; /* Max Requests allowed */ 282 #endif /* PPP_SERVER */ 283 #endif /* EAP_SUPPORT */ 284 285 #endif /* PPP_AUTH_SUPPORT */ 286 287 u8_t fsm_timeout_time; /* Timeout time in seconds */ 288 u8_t fsm_max_conf_req_transmits; /* Maximum Configure-Request transmissions */ 289 u8_t fsm_max_term_transmits; /* Maximum Terminate-Request transmissions */ 290 u8_t fsm_max_nak_loops; /* Maximum number of nak loops tolerated */ 291 292 u8_t lcp_loopbackfail; /* Number of times we receive our magic number from the peer 293 before deciding the link is looped-back. */ 294 u8_t lcp_echo_interval; /* Interval between LCP echo-requests */ 295 u8_t lcp_echo_fails; /* Tolerance to unanswered echo-requests */ 296 297 } ppp_settings; 298 299 #if PPP_SERVER 300 struct ppp_addrs { 301 #if PPP_IPV4_SUPPORT 302 ip4_addr_t our_ipaddr, his_ipaddr, netmask; 303 #if LWIP_DNS 304 ip4_addr_t dns1, dns2; 305 #endif /* LWIP_DNS */ 306 #endif /* PPP_IPV4_SUPPORT */ 307 #if PPP_IPV6_SUPPORT 308 ip6_addr_t our6_ipaddr, his6_ipaddr; 309 #endif /* PPP_IPV6_SUPPORT */ 310 }; 311 #endif /* PPP_SERVER */ 312 313 /* 314 * PPP interface control block. 315 */ 316 struct ppp_pcb_s { 317 ppp_settings settings; 318 const struct link_callbacks *link_cb; 319 void *link_ctx_cb; 320 void (*link_status_cb)(ppp_pcb *pcb, int err_code, void *ctx); /* Status change callback */ 321 #if PPP_NOTIFY_PHASE 322 void (*notify_phase_cb)(ppp_pcb *pcb, u8_t phase, void *ctx); /* Notify phase callback */ 323 #endif /* PPP_NOTIFY_PHASE */ 324 void *ctx_cb; /* Callbacks optional pointer */ 325 struct netif *netif; /* PPP interface */ 326 u8_t phase; /* where the link is at */ 327 u8_t err_code; /* Code indicating why interface is down. */ 328 329 /* flags */ 330 #if PPP_IPV4_SUPPORT 331 unsigned int ask_for_local :1; /* request our address from peer */ 332 unsigned int ipcp_is_open :1; /* haven't called np_finished() */ 333 unsigned int ipcp_is_up :1; /* have called ipcp_up() */ 334 unsigned int if4_up :1; /* True when the IPv4 interface is up. */ 335 #if 0 /* UNUSED - PROXY ARP */ 336 unsigned int proxy_arp_set :1; /* Have created proxy arp entry */ 337 #endif /* UNUSED - PROXY ARP */ 338 #endif /* PPP_IPV4_SUPPORT */ 339 #if PPP_IPV6_SUPPORT 340 unsigned int ipv6cp_is_up :1; /* have called ip6cp_up() */ 341 unsigned int if6_up :1; /* True when the IPv6 interface is up. */ 342 #endif /* PPP_IPV6_SUPPORT */ 343 unsigned int lcp_echo_timer_running :1; /* set if a timer is running */ 344 #if VJ_SUPPORT 345 unsigned int vj_enabled :1; /* Flag indicating VJ compression enabled. */ 346 #endif /* VJ_SUPPORT */ 347 #if CCP_SUPPORT 348 unsigned int ccp_all_rejected :1; /* we rejected all peer's options */ 349 #endif /* CCP_SUPPORT */ 350 #if MPPE_SUPPORT 351 unsigned int mppe_keys_set :1; /* Have the MPPE keys been set? */ 352 #endif /* MPPE_SUPPORT */ 353 354 #if PPP_AUTH_SUPPORT 355 /* auth data */ 356 #if PPP_SERVER && defined(HAVE_MULTILINK) 357 char peer_authname[MAXNAMELEN + 1]; /* The name by which the peer authenticated itself to us. */ 358 #endif /* PPP_SERVER && defined(HAVE_MULTILINK) */ 359 u16_t auth_pending; /* Records which authentication operations haven't completed yet. */ 360 u16_t auth_done; /* Records which authentication operations have been completed. */ 361 362 #if PAP_SUPPORT 363 upap_state upap; /* PAP data */ 364 #endif /* PAP_SUPPORT */ 365 366 #if CHAP_SUPPORT 367 chap_client_state chap_client; /* CHAP client data */ 368 #if PPP_SERVER 369 chap_server_state chap_server; /* CHAP server data */ 370 #endif /* PPP_SERVER */ 371 #endif /* CHAP_SUPPORT */ 372 373 #if EAP_SUPPORT 374 eap_state eap; /* EAP data */ 375 #endif /* EAP_SUPPORT */ 376 #endif /* PPP_AUTH_SUPPORT */ 377 378 fsm lcp_fsm; /* LCP fsm structure */ 379 lcp_options lcp_wantoptions; /* Options that we want to request */ 380 lcp_options lcp_gotoptions; /* Options that peer ack'd */ 381 lcp_options lcp_allowoptions; /* Options we allow peer to request */ 382 lcp_options lcp_hisoptions; /* Options that we ack'd */ 383 u16_t peer_mru; /* currently negotiated peer MRU */ 384 u8_t lcp_echos_pending; /* Number of outstanding echo msgs */ 385 u8_t lcp_echo_number; /* ID number of next echo frame */ 386 387 u8_t num_np_open; /* Number of network protocols which we have opened. */ 388 u8_t num_np_up; /* Number of network protocols which have come up. */ 389 390 #if VJ_SUPPORT 391 struct vjcompress vj_comp; /* Van Jacobson compression header. */ 392 #endif /* VJ_SUPPORT */ 393 394 #if CCP_SUPPORT 395 fsm ccp_fsm; /* CCP fsm structure */ 396 ccp_options ccp_wantoptions; /* what to request the peer to use */ 397 ccp_options ccp_gotoptions; /* what the peer agreed to do */ 398 ccp_options ccp_allowoptions; /* what we'll agree to do */ 399 ccp_options ccp_hisoptions; /* what we agreed to do */ 400 u8_t ccp_localstate; /* Local state (mainly for handling reset-reqs and reset-acks). */ 401 u8_t ccp_receive_method; /* Method chosen on receive path */ 402 u8_t ccp_transmit_method; /* Method chosen on transmit path */ 403 #if MPPE_SUPPORT 404 ppp_mppe_state mppe_comp; /* MPPE "compressor" structure */ 405 ppp_mppe_state mppe_decomp; /* MPPE "decompressor" structure */ 406 #endif /* MPPE_SUPPORT */ 407 #endif /* CCP_SUPPORT */ 408 409 #if PPP_IPV4_SUPPORT 410 fsm ipcp_fsm; /* IPCP fsm structure */ 411 ipcp_options ipcp_wantoptions; /* Options that we want to request */ 412 ipcp_options ipcp_gotoptions; /* Options that peer ack'd */ 413 ipcp_options ipcp_allowoptions; /* Options we allow peer to request */ 414 ipcp_options ipcp_hisoptions; /* Options that we ack'd */ 415 #endif /* PPP_IPV4_SUPPORT */ 416 417 #if PPP_IPV6_SUPPORT 418 fsm ipv6cp_fsm; /* IPV6CP fsm structure */ 419 ipv6cp_options ipv6cp_wantoptions; /* Options that we want to request */ 420 ipv6cp_options ipv6cp_gotoptions; /* Options that peer ack'd */ 421 ipv6cp_options ipv6cp_allowoptions; /* Options we allow peer to request */ 422 ipv6cp_options ipv6cp_hisoptions; /* Options that we ack'd */ 423 #endif /* PPP_IPV6_SUPPORT */ 424 }; 425 426 /************************ 427 *** PUBLIC FUNCTIONS *** 428 ************************/ 429 430 /* 431 * WARNING: For multi-threads environment, all ppp_set_* functions most 432 * only be called while the PPP is in the dead phase (i.e. disconnected). 433 */ 434 435 #if PPP_AUTH_SUPPORT 436 /* 437 * Set PPP authentication. 438 * 439 * Warning: Using PPPAUTHTYPE_ANY might have security consequences. 440 * RFC 1994 says: 441 * 442 * In practice, within or associated with each PPP server, there is a 443 * database which associates "user" names with authentication 444 * information ("secrets"). It is not anticipated that a particular 445 * named user would be authenticated by multiple methods. This would 446 * make the user vulnerable to attacks which negotiate the least secure 447 * method from among a set (such as PAP rather than CHAP). If the same 448 * secret was used, PAP would reveal the secret to be used later with 449 * CHAP. 450 * 451 * Instead, for each user name there should be an indication of exactly 452 * one method used to authenticate that user name. If a user needs to 453 * make use of different authentication methods under different 454 * circumstances, then distinct user names SHOULD be employed, each of 455 * which identifies exactly one authentication method. 456 * 457 * Default is none auth type, unset (NULL) user and passwd. 458 */ 459 #define PPPAUTHTYPE_NONE 0x00 460 #define PPPAUTHTYPE_PAP 0x01 461 #define PPPAUTHTYPE_CHAP 0x02 462 #define PPPAUTHTYPE_MSCHAP 0x04 463 #define PPPAUTHTYPE_MSCHAP_V2 0x08 464 #define PPPAUTHTYPE_EAP 0x10 465 #define PPPAUTHTYPE_ANY 0xff 466 void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd); 467 468 /* 469 * If set, peer is required to authenticate. This is mostly necessary for PPP server support. 470 * 471 * Default is false. 472 */ 473 #define ppp_set_auth_required(ppp, boolval) (ppp->settings.auth_required = boolval) 474 #endif /* PPP_AUTH_SUPPORT */ 475 476 #if PPP_IPV4_SUPPORT 477 /* 478 * Set PPP interface "our" and "his" IPv4 addresses. This is mostly necessary for PPP server 479 * support but it can also be used on a PPP link where each side choose its own IP address. 480 * 481 * Default is unset (0.0.0.0). 482 */ 483 #define ppp_set_ipcp_ouraddr(ppp, addr) do { ppp->ipcp_wantoptions.ouraddr = ip4_addr_get_u32(addr); \ 484 ppp->ask_for_local = ppp->ipcp_wantoptions.ouraddr != 0; } while(0) 485 #define ppp_set_ipcp_hisaddr(ppp, addr) (ppp->ipcp_wantoptions.hisaddr = ip4_addr_get_u32(addr)) 486 #if LWIP_DNS 487 /* 488 * Set DNS server addresses that are sent if the peer asks for them. This is mostly necessary 489 * for PPP server support. 490 * 491 * Default is unset (0.0.0.0). 492 */ 493 #define ppp_set_ipcp_dnsaddr(ppp, index, addr) (ppp->ipcp_allowoptions.dnsaddr[index] = ip4_addr_get_u32(addr)) 494 495 /* 496 * If set, we ask the peer for up to 2 DNS server addresses. Received DNS server addresses are 497 * registered using the dns_setserver() function. 498 * 499 * Default is false. 500 */ 501 #define ppp_set_usepeerdns(ppp, boolval) (ppp->settings.usepeerdns = boolval) 502 #endif /* LWIP_DNS */ 503 #endif /* PPP_IPV4_SUPPORT */ 504 505 #if MPPE_SUPPORT 506 /* Disable MPPE (Microsoft Point to Point Encryption). This parameter is exclusive. */ 507 #define PPP_MPPE_DISABLE 0x00 508 /* Require the use of MPPE (Microsoft Point to Point Encryption). */ 509 #define PPP_MPPE_ENABLE 0x01 510 /* Allow MPPE to use stateful mode. Stateless mode is still attempted first. */ 511 #define PPP_MPPE_ALLOW_STATEFUL 0x02 512 /* Refuse the use of MPPE with 40-bit encryption. Conflict with PPP_MPPE_REFUSE_128. */ 513 #define PPP_MPPE_REFUSE_40 0x04 514 /* Refuse the use of MPPE with 128-bit encryption. Conflict with PPP_MPPE_REFUSE_40. */ 515 #define PPP_MPPE_REFUSE_128 0x08 516 /* 517 * Set MPPE configuration 518 * 519 * Default is disabled. 520 */ 521 void ppp_set_mppe(ppp_pcb *pcb, u8_t flags); 522 #endif /* MPPE_SUPPORT */ 523 524 /* 525 * Wait for up to intval milliseconds for a valid PPP packet from the peer. 526 * At the end of this time, or when a valid PPP packet is received from the 527 * peer, we commence negotiation by sending our first LCP packet. 528 * 529 * Default is 0. 530 */ 531 #define ppp_set_listen_time(ppp, intval) (ppp->settings.listen_time = intval) 532 533 /* 534 * If set, we will attempt to initiate a connection but if no reply is received from 535 * the peer, we will then just wait passively for a valid LCP packet from the peer. 536 * 537 * Default is false. 538 */ 539 #define ppp_set_passive(ppp, boolval) (ppp->lcp_wantoptions.passive = boolval) 540 541 /* 542 * If set, we will not transmit LCP packets to initiate a connection until a valid 543 * LCP packet is received from the peer. This is what we usually call the server mode. 544 * 545 * Default is false. 546 */ 547 #define ppp_set_silent(ppp, boolval) (ppp->lcp_wantoptions.silent = boolval) 548 549 /* 550 * If set, enable protocol field compression negotiation in both the receive and 551 * the transmit direction. 552 * 553 * Default is true. 554 */ 555 #define ppp_set_neg_pcomp(ppp, boolval) (ppp->lcp_wantoptions.neg_pcompression = \ 556 ppp->lcp_allowoptions.neg_pcompression = boolval) 557 558 /* 559 * If set, enable Address/Control compression in both the receive and the transmit 560 * direction. 561 * 562 * Default is true. 563 */ 564 #define ppp_set_neg_accomp(ppp, boolval) (ppp->lcp_wantoptions.neg_accompression = \ 565 ppp->lcp_allowoptions.neg_accompression = boolval) 566 567 /* 568 * If set, enable asyncmap negotiation. Otherwise forcing all control characters to 569 * be escaped for both the transmit and the receive direction. 570 * 571 * Default is true. 572 */ 573 #define ppp_set_neg_asyncmap(ppp, boolval) (ppp->lcp_wantoptions.neg_asyncmap = \ 574 ppp->lcp_allowoptions.neg_asyncmap = boolval) 575 576 /* 577 * This option sets the Async-Control-Character-Map (ACCM) for this end of the link. 578 * The ACCM is a set of 32 bits, one for each of the ASCII control characters with 579 * values from 0 to 31, where a 1 bit indicates that the corresponding control 580 * character should not be used in PPP packets sent to this system. The map is 581 * an unsigned 32 bits integer where the least significant bit (00000001) represents 582 * character 0 and the most significant bit (80000000) represents character 31. 583 * We will then ask the peer to send these characters as a 2-byte escape sequence. 584 * 585 * Default is 0. 586 */ 587 #define ppp_set_asyncmap(ppp, intval) (ppp->lcp_wantoptions.asyncmap = intval) 588 589 /* 590 * Set a PPP interface as the default network interface 591 * (used to output all packets for which no specific route is found). 592 */ 593 #define ppp_set_default(ppp) netif_set_default(ppp->netif) 594 595 #if PPP_NOTIFY_PHASE 596 /* 597 * Set a PPP notify phase callback. 598 * 599 * This can be used for example to set a LED pattern depending on the 600 * current phase of the PPP session. 601 */ 602 typedef void (*ppp_notify_phase_cb_fn)(ppp_pcb *pcb, u8_t phase, void *ctx); 603 void ppp_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb); 604 #endif /* PPP_NOTIFY_PHASE */ 605 606 /* 607 * Initiate a PPP connection. 608 * 609 * This can only be called if PPP is in the dead phase. 610 * 611 * Holdoff is the time to wait (in seconds) before initiating 612 * the connection. 613 * 614 * If this port connects to a modem, the modem connection must be 615 * established before calling this. 616 */ 617 err_t ppp_connect(ppp_pcb *pcb, u16_t holdoff); 618 619 #if PPP_SERVER 620 /* 621 * Listen for an incoming PPP connection. 622 * 623 * This can only be called if PPP is in the dead phase. 624 * 625 * If this port connects to a modem, the modem connection must be 626 * established before calling this. 627 */ 628 err_t ppp_listen(ppp_pcb *pcb); 629 #endif /* PPP_SERVER */ 630 631 /* 632 * Initiate the end of a PPP connection. 633 * Any outstanding packets in the queues are dropped. 634 * 635 * Setting nocarrier to 1 close the PPP connection without initiating the 636 * shutdown procedure. Always using nocarrier = 0 is still recommended, 637 * this is going to take a little longer time if your link is down, but 638 * is a safer choice for the PPP state machine. 639 * 640 * Return 0 on success, an error code on failure. 641 */ 642 err_t ppp_close(ppp_pcb *pcb, u8_t nocarrier); 643 644 /* 645 * Release the control block. 646 * 647 * This can only be called if PPP is in the dead phase. 648 * 649 * You must use ppp_close() before if you wish to terminate 650 * an established PPP session. 651 * 652 * Return 0 on success, an error code on failure. 653 */ 654 err_t ppp_free(ppp_pcb *pcb); 655 656 /* 657 * PPP IOCTL commands. 658 * 659 * Get the up status - 0 for down, non-zero for up. The argument must 660 * point to an int. 661 */ 662 #define PPPCTLG_UPSTATUS 0 663 664 /* 665 * Get the PPP error code. The argument must point to an int. 666 * Returns a PPPERR_* value. 667 */ 668 #define PPPCTLG_ERRCODE 1 669 670 /* 671 * Get the fd associated with a PPP over serial 672 */ 673 #define PPPCTLG_FD 2 674 675 /* 676 * Get and set parameters for the given connection. 677 * Return 0 on success, an error code on failure. 678 */ 679 err_t ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg); 680 681 /* Get the PPP netif interface */ 682 #define ppp_netif(ppp) (ppp->netif) 683 684 /* Set an lwIP-style status-callback for the selected PPP device */ 685 #define ppp_set_netif_statuscallback(ppp, status_cb) \ 686 netif_set_status_callback(ppp->netif, status_cb); 687 688 /* Set an lwIP-style link-callback for the selected PPP device */ 689 #define ppp_set_netif_linkcallback(ppp, link_cb) \ 690 netif_set_link_callback(ppp->netif, link_cb); 691 692 #ifdef __cplusplus 693 } 694 #endif 695 696 #endif /* PPP_H */ 697 698 #endif /* PPP_SUPPORT */ 699