1 /*****************************************************************************
2 * ppp.c - Network Point to Point Protocol program file.
4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
5 * portions Copyright (c) 1997 by Global Election Systems Inc.
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.
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.
25 ******************************************************************************
28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
30 * 97-11-05 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
32 *****************************************************************************/
35 * ppp_defs.h - PPP definitions.
37 * if_pppvar.h - private structures and declarations for PPP.
39 * Copyright (c) 1994 The Australian National University.
40 * All rights reserved.
42 * Permission to use, copy, modify, and distribute this software and its
43 * documentation is hereby granted, provided that the above copyright
44 * notice appears in all copies. This software is provided without any
45 * warranty, express or implied. The Australian National University
46 * makes no representations about the suitability of this software for
49 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
50 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
51 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
52 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
55 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
56 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
57 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
58 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
59 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
64 * if_ppp.h - Point-to-Point Protocol definitions.
66 * Copyright (c) 1989 Carnegie Mellon University.
67 * All rights reserved.
69 * Redistribution and use in source and binary forms are permitted
70 * provided that the above copyright notice and this paragraph are
71 * duplicated in all such forms and that any documentation,
72 * advertising materials, and other materials related to such
73 * distribution and use acknowledge that the software was developed
74 * by Carnegie Mellon University. The name of the
75 * University may not be used to endorse or promote products derived
76 * from this software without specific prior written permission.
77 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
78 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
79 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
84 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
87 #include "lwip/ip.h" /* for ip_input() */
95 #endif /* PAP_SUPPORT */
98 #endif /* CHAP_SUPPORT */
105 #endif /* VJ_SUPPORT */
107 #include "netif/ppp_oe.h"
108 #endif /* PPPOE_SUPPORT */
110 #include "lwip/tcpip.h"
111 #include "lwip/api.h"
112 #include "lwip/snmp.h"
116 /*************************/
117 /*** LOCAL DEFINITIONS ***/
118 /*************************/
120 /** PPP_INPROC_MULTITHREADED==1 call pppInput using tcpip_callback().
121 * Set this to 0 if pppInProc is called inside tcpip_thread or with NO_SYS==1.
122 * Default is 1 for NO_SYS==0 (multithreaded) and 0 for NO_SYS==1 (single-threaded).
124 #ifndef PPP_INPROC_MULTITHREADED
125 #define PPP_INPROC_MULTITHREADED (NO_SYS==0)
128 /** PPP_INPROC_OWNTHREAD==1: start a dedicated RX thread per PPP session.
129 * Default is 0: call pppos_input() for received raw characters, charcater
130 * reception is up to the port */
131 #ifndef PPP_INPROC_OWNTHREAD
132 #define PPP_INPROC_OWNTHREAD PPP_INPROC_MULTITHREADED
135 #if PPP_INPROC_OWNTHREAD && !PPP_INPROC_MULTITHREADED
136 #error "PPP_INPROC_OWNTHREAD needs PPP_INPROC_MULTITHREADED==1"
140 * The basic PPP frame.
142 #define PPP_ADDRESS(p) (((u_char *)(p))[0])
143 #define PPP_CONTROL(p) (((u_char *)(p))[1])
144 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
146 /* PPP packet parser states. Current state indicates operation yet to be
149 PDIDLE = 0, /* Idle state - waiting. */
150 PDSTART, /* Process start flag. */
151 PDADDRESS, /* Process address field. */
152 PDCONTROL, /* Process control field. */
153 PDPROTOCOL1, /* Process protocol field 1. */
154 PDPROTOCOL2, /* Process protocol field 2. */
155 PDDATA /* Process data byte. */
158 #define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])
160 /************************/
161 /*** LOCAL DATA TYPES ***/
162 /************************/
164 /** RX buffer size: this may be configured smaller! */
165 #ifndef PPPOS_RX_BUFSIZE
166 #define PPPOS_RX_BUFSIZE (PPP_MRU + PPP_HDRLEN)
169 typedef struct PPPControlRx_s {
170 /** unit number / ppp descriptor */
172 /** the rx file descriptor */
174 /** receive buffer - encoded data is stored here */
175 #if PPP_INPROC_OWNTHREAD
176 u_char rxbuf[PPPOS_RX_BUFSIZE];
177 #endif /* PPP_INPROC_OWNTHREAD */
179 /* The input packet. */
180 struct pbuf *inHead, *inTail;
183 u16_t inProtocol; /* The input protocol code. */
184 u16_t inFCS; /* Input Frame Check Sequence value. */
185 #endif /* PPPOS_SUPPORT */
186 PPPDevStates inState; /* The input process state. */
187 char inEscaped; /* Escape next character. */
188 ext_accm inACCM; /* Async-Ctl-Char-Map for input. */
192 * PPP interface control block.
194 typedef struct PPPControl_s {
196 char openFlag; /* True when in use. */
199 struct pppoe_softc *pppoe_sc;
200 #endif /* PPPOE_SUPPORT */
201 int if_up; /* True when the interface is up. */
202 int errCode; /* Code indicating why interface is down. */
204 sio_fd_t fd; /* File device ID of port. */
205 #endif /* PPPOS_SUPPORT */
206 u16_t mtu; /* Peer's mru */
207 int pcomp; /* Does peer accept protocol compression? */
208 int accomp; /* Does peer accept addr/ctl compression? */
209 u_long lastXMit; /* Time of last transmission. */
210 ext_accm outACCM; /* Async-Ctl-Char-Map for output. */
211 #if PPPOS_SUPPORT && VJ_SUPPORT
212 int vjEnabled; /* Flag indicating VJ compression enabled. */
213 struct vjcompress vjComp; /* Van Jacobson compression header. */
214 #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
218 struct ppp_addrs addrs;
220 void (*linkStatusCB)(void *ctx, int errCode, void *arg);
231 int protocol; /* PPP procotol, e.g. PPP_IP */
237 /***********************************/
238 /*** LOCAL FUNCTION DECLARATIONS ***/
239 /***********************************/
241 #if PPP_INPROC_OWNTHREAD
242 static void pppInputThread(void *arg);
243 #endif /* PPP_INPROC_OWNTHREAD */
244 static void pppDrop(PPPControlRx *pcrx);
245 static void pppInProc(PPPControlRx *pcrx, u_char *s, int l);
246 static void pppFreeCurrentInputPacket(PPPControlRx *pcrx);
247 #endif /* PPPOS_SUPPORT */
250 /******************************/
251 /*** PUBLIC DATA STRUCTURES ***/
252 /******************************/
255 static PPPControl pppControl[NUM_PPP]; /* The PPP interface control blocks. */
258 * PPP Data Link Layer "protocol" table.
259 * One entry per supported protocol.
260 * The last entry must be NULL.
262 struct protent *ppp_protocols[] = {
266 #endif /* PAP_SUPPORT */
269 #endif /* CHAP_SUPPORT */
272 #endif /* CBCP_SUPPORT */
276 #endif /* CCP_SUPPORT */
282 * Buffers for outgoing packets. This must be accessed only from the appropriate
283 * PPP task so that it doesn't need to be protected to avoid collisions.
285 u_char outpacket_buf[NUM_PPP][PPP_MRU+PPP_HDRLEN];
288 /*****************************/
289 /*** LOCAL DATA STRUCTURES ***/
290 /*****************************/
294 * FCS lookup table as calculated by genfcstab.
295 * @todo: smaller, slower implementation for lower memory footprint?
297 static const u_short fcstab[256] = {
298 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
299 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
300 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
301 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
302 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
303 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
304 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
305 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
306 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
307 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
308 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
309 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
310 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
311 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
312 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
313 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
314 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
315 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
316 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
317 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
318 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
319 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
320 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
321 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
322 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
323 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
324 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
325 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
326 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
327 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
328 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
329 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
332 /* PPP's Asynchronous-Control-Character-Map. The mask array is used
333 * to select the specific bit for a character. */
334 static u_char pppACCMMask[] = {
345 #if PPP_INPROC_OWNTHREAD
346 /** Wake up the task blocked in reading from serial line (if any) */
348 pppRecvWakeup(int pd)
350 PPPDEBUG(LOG_DEBUG, ("pppRecvWakeup: unit %d\n", pd));
351 if (pppControl[pd].openFlag != 0) {
352 sio_read_abort(pppControl[pd].fd);
355 #endif /* PPP_INPROC_OWNTHREAD */
356 #endif /* PPPOS_SUPPORT */
359 pppLinkTerminated(int pd)
361 PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: unit %d\n", pd));
364 if (pppControl[pd].ethif) {
365 pppoe_disconnect(pppControl[pd].pppoe_sc);
367 #endif /* PPPOE_SUPPORT */
371 #if PPP_INPROC_OWNTHREAD
373 #endif /* PPP_INPROC_OWNTHREAD */
374 pc = &pppControl[pd];
376 PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
377 if (pc->linkStatusCB) {
378 pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
381 pc->openFlag = 0;/**/
382 #endif /* PPPOS_SUPPORT */
384 PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: finished.\n"));
390 PPPDEBUG(LOG_DEBUG, ("pppLinkDown: unit %d\n", pd));
393 if (pppControl[pd].ethif) {
394 pppoe_disconnect(pppControl[pd].pppoe_sc);
396 #endif /* PPPOE_SUPPORT */
398 #if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
400 #endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD*/
404 /** Initiate LCP open request */
408 PPPDEBUG(LOG_DEBUG, ("pppStart: unit %d\n", pd));
410 lcp_open(pd); /* Start protocol */
411 PPPDEBUG(LOG_DEBUG, ("pppStart: finished\n"));
414 /** LCP close request */
418 PPPDEBUG(LOG_DEBUG, ("pppStop: unit %d\n", pd));
419 lcp_close(pd, "User request");
422 /** Called when carrier/link is lost */
426 PPPDEBUG(LOG_DEBUG, ("pppHupCB: unit %d\n", pd));
431 /***********************************/
432 /*** PUBLIC FUNCTION DEFINITIONS ***/
433 /***********************************/
434 /* Initialize the PPP subsystem. */
436 struct ppp_settings ppp_settings;
441 struct protent *protp;
444 memset(&ppp_settings, 0, sizeof(ppp_settings));
445 ppp_settings.usepeerdns = 1;
446 pppSetAuth(PPPAUTHTYPE_NONE, NULL, NULL);
450 subnetMask = PP_HTONL(0xffffff00UL);
452 for (i = 0; i < NUM_PPP; i++) {
453 /* Initialize each protocol to the standard option set. */
454 for (j = 0; (protp = ppp_protocols[j]) != NULL; ++j) {
461 pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd)
464 case PPPAUTHTYPE_NONE:
466 #ifdef LWIP_PPP_STRICT_PAP_REJECT
467 ppp_settings.refuse_pap = 1;
468 #else /* LWIP_PPP_STRICT_PAP_REJECT */
469 /* some providers request pap and accept an empty login/pw */
470 ppp_settings.refuse_pap = 0;
471 #endif /* LWIP_PPP_STRICT_PAP_REJECT */
472 ppp_settings.refuse_chap = 1;
475 case PPPAUTHTYPE_ANY:
476 /* Warning: Using PPPAUTHTYPE_ANY might have security consequences.
479 * In practice, within or associated with each PPP server, there is a
480 * database which associates "user" names with authentication
481 * information ("secrets"). It is not anticipated that a particular
482 * named user would be authenticated by multiple methods. This would
483 * make the user vulnerable to attacks which negotiate the least secure
484 * method from among a set (such as PAP rather than CHAP). If the same
485 * secret was used, PAP would reveal the secret to be used later with
488 * Instead, for each user name there should be an indication of exactly
489 * one method used to authenticate that user name. If a user needs to
490 * make use of different authentication methods under different
491 * circumstances, then distinct user names SHOULD be employed, each of
492 * which identifies exactly one authentication method.
495 ppp_settings.refuse_pap = 0;
496 ppp_settings.refuse_chap = 0;
499 case PPPAUTHTYPE_PAP:
500 ppp_settings.refuse_pap = 0;
501 ppp_settings.refuse_chap = 1;
504 case PPPAUTHTYPE_CHAP:
505 ppp_settings.refuse_pap = 1;
506 ppp_settings.refuse_chap = 0;
511 strncpy(ppp_settings.user, user, sizeof(ppp_settings.user)-1);
512 ppp_settings.user[sizeof(ppp_settings.user)-1] = '\0';
514 ppp_settings.user[0] = '\0';
518 strncpy(ppp_settings.passwd, passwd, sizeof(ppp_settings.passwd)-1);
519 ppp_settings.passwd[sizeof(ppp_settings.passwd)-1] = '\0';
521 ppp_settings.passwd[0] = '\0';
526 /** Open a new PPP connection using the given I/O device.
527 * This initializes the PPP control block but does not
528 * attempt to negotiate the LCP session. If this port
529 * connects to a modem, the modem connection must be
530 * established before calling this.
531 * Return a new PPP connection descriptor on success or
532 * an error code (negative) on failure.
534 * pppOpen() is directly defined to this function.
537 pppOverSerialOpen(sio_fd_t fd, pppLinkStatusCB_fn linkStatusCB, void *linkStatusCtx)
542 if (linkStatusCB == NULL) {
543 /* PPP is single-threaded: without a callback,
544 * there is no way to know when the link is up. */
548 /* Find a free PPP session descriptor. */
549 for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
554 pc = &pppControl[pd];
555 /* input pbuf left over from last session? */
556 pppFreeCurrentInputPacket(&pc->rx);
557 /* @todo: is this correct or do I overwrite something? */
558 memset(pc, 0, sizeof(PPPControl));
566 vj_compress_init(&pc->vjComp);
567 #endif /* VJ_SUPPORT */
570 * Default the in and out accm so that escape and flag characters
571 * are always escaped.
573 pc->rx.inACCM[15] = 0x60; /* no need to protect since RX is not running */
574 pc->outACCM[15] = 0x60;
576 pc->linkStatusCB = linkStatusCB;
577 pc->linkStatusCtx = linkStatusCtx;
580 * Start the connection and handle incoming events (packet or timeout).
582 PPPDEBUG(LOG_INFO, ("pppOverSerialOpen: unit %d: Connecting\n", pd));
584 #if PPP_INPROC_OWNTHREAD
585 sys_thread_new(PPP_THREAD_NAME, pppInputThread, (void*)&pc->rx, PPP_THREAD_STACKSIZE, PPP_THREAD_PRIO);
586 #endif /* PPP_INPROC_OWNTHREAD */
591 #endif /* PPPOS_SUPPORT */
594 static void pppOverEthernetLinkStatusCB(int pd, int up);
597 pppOverEthernetClose(int pd)
599 PPPControl* pc = &pppControl[pd];
601 /* *TJL* There's no lcp_deinit */
604 pppoe_destroy(&pc->netif);
607 int pppOverEthernetOpen(struct netif *ethif, const char *service_name, const char *concentrator_name,
608 pppLinkStatusCB_fn linkStatusCB, void *linkStatusCtx)
613 LWIP_UNUSED_ARG(service_name);
614 LWIP_UNUSED_ARG(concentrator_name);
616 if (linkStatusCB == NULL) {
617 /* PPP is single-threaded: without a callback,
618 * there is no way to know when the link is up. */
622 /* Find a free PPP session descriptor. Critical region? */
623 for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
627 pc = &pppControl[pd];
628 memset(pc, 0, sizeof(PPPControl));
632 pc->linkStatusCB = linkStatusCB;
633 pc->linkStatusCtx = linkStatusCtx;
635 lcp_wantoptions[pd].mru = PPPOE_MAXMTU;
636 lcp_wantoptions[pd].neg_asyncmap = 0;
637 lcp_wantoptions[pd].neg_pcompression = 0;
638 lcp_wantoptions[pd].neg_accompression = 0;
640 lcp_allowoptions[pd].mru = PPPOE_MAXMTU;
641 lcp_allowoptions[pd].neg_asyncmap = 0;
642 lcp_allowoptions[pd].neg_pcompression = 0;
643 lcp_allowoptions[pd].neg_accompression = 0;
645 if(pppoe_create(ethif, pd, pppOverEthernetLinkStatusCB, &pc->pppoe_sc) != ERR_OK) {
650 pppoe_connect(pc->pppoe_sc);
655 #endif /* PPPOE_SUPPORT */
658 /* Close a PPP connection and release the descriptor.
659 * Any outstanding packets in the queues are dropped.
660 * Return 0 on success, an error code on failure. */
664 PPPControl *pc = &pppControl[pd];
667 PPPDEBUG(LOG_DEBUG, ("pppClose() called\n"));
672 PPPDEBUG(LOG_DEBUG, ("pppClose: unit %d kill_link -> pppStop\n", pd));
673 pc->errCode = PPPERR_USER;
674 /* This will leave us at PHASE_DEAD. */
677 #endif /* PPPOE_SUPPORT */
680 PPPDEBUG(LOG_DEBUG, ("pppClose: unit %d kill_link -> pppStop\n", pd));
681 pc->errCode = PPPERR_USER;
682 /* This will leave us at PHASE_DEAD. */
684 #if PPP_INPROC_OWNTHREAD
686 #endif /* PPP_INPROC_OWNTHREAD */
687 #endif /* PPPOS_SUPPORT */
693 /* This function is called when carrier is lost on the PPP channel. */
697 PPPDEBUG(LOG_DEBUG, ("pppSigHUP: unit %d sig_hup -> pppHupCB\n", pd));
703 nPut(PPPControl *pc, struct pbuf *nb)
708 for(b = nb; b != NULL; b = b->next) {
709 if((c = sio_write(pc->fd, b->payload, b->len)) != b->len) {
710 PPPDEBUG(LOG_WARNING,
711 ("PPP nPut: incomplete sio_write(fd:%"SZT_F", len:%d, c: 0x%"X8_F") c = %d\n", (size_t)pc->fd, b->len, c, c));
712 LINK_STATS_INC(link.err);
713 pc->lastXMit = 0; /* prepend PPP_FLAG to next packet */
714 snmp_inc_ifoutdiscards(&pc->netif);
720 snmp_add_ifoutoctets(&pc->netif, nb->tot_len);
721 snmp_inc_ifoutucastpkts(&pc->netif);
723 LINK_STATS_INC(link.xmit);
727 * pppAppend - append given character to end of given pbuf. If outACCM
728 * is not NULL and the character needs to be escaped, do so.
729 * If pbuf is full, append another.
730 * Return the current pbuf.
733 pppAppend(u_char c, struct pbuf *nb, ext_accm *outACCM)
735 struct pbuf *tb = nb;
737 /* Make sure there is room for the character and an escape code.
738 * Sure we don't quite fill the buffer if the character doesn't
739 * get escaped but is one character worth complicating this? */
740 /* Note: We assume no packet header. */
741 if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
742 tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
746 LINK_STATS_INC(link.memerr);
752 if (outACCM && ESCAPE_P(*outACCM, c)) {
753 *((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
754 *((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
756 *((u_char*)nb->payload + nb->len++) = c;
762 #endif /* PPPOS_SUPPORT */
766 pppifOutputOverEthernet(int pd, struct pbuf *p)
768 PPPControl *pc = &pppControl[pd];
770 u_short protocol = PPP_IP;
774 /* @todo: try to use pbuf_header() here! */
775 pb = pbuf_alloc(PBUF_LINK, PPPOE_HDRLEN + sizeof(protocol), PBUF_RAM);
777 LINK_STATS_INC(link.memerr);
778 LINK_STATS_INC(link.proterr);
779 snmp_inc_ifoutdiscards(&pc->netif);
783 pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
785 pc->lastXMit = sys_jiffies();
787 if (!pc->pcomp || protocol > 0xFF) {
788 *((u_char*)pb->payload + i++) = (protocol >> 8) & 0xFF;
790 *((u_char*)pb->payload + i) = protocol & 0xFF;
793 tot_len = pb->tot_len;
795 if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
796 LINK_STATS_INC(link.err);
797 snmp_inc_ifoutdiscards(&pc->netif);
798 return PPPERR_DEVICE;
801 snmp_add_ifoutoctets(&pc->netif, tot_len);
802 snmp_inc_ifoutucastpkts(&pc->netif);
803 LINK_STATS_INC(link.xmit);
806 #endif /* PPPOE_SUPPORT */
808 /* Send a packet on the given connection. */
810 pppifOutput(struct netif *netif, struct pbuf *pb, ip_addr_t *ipaddr)
812 int pd = (int)(size_t)netif->state;
813 PPPControl *pc = &pppControl[pd];
815 u_short protocol = PPP_IP;
816 u_int fcsOut = PPP_INITFCS;
817 struct pbuf *headMB = NULL, *tailMB = NULL, *p;
819 #endif /* PPPOS_SUPPORT */
821 LWIP_UNUSED_ARG(ipaddr);
823 /* Validate parameters. */
824 /* We let any protocol value go through - it can't hurt us
825 * and the peer will just drop it if it's not accepting it. */
826 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag || !pb) {
827 PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: bad parms prot=%d pb=%p\n",
829 LINK_STATS_INC(link.opterr);
830 LINK_STATS_INC(link.drop);
831 snmp_inc_ifoutdiscards(netif);
835 /* Check that the link is up. */
836 if (lcp_phase[pd] == PHASE_DEAD) {
837 PPPDEBUG(LOG_ERR, ("pppifOutput[%d]: link not up\n", pd));
838 LINK_STATS_INC(link.rterr);
839 LINK_STATS_INC(link.drop);
840 snmp_inc_ifoutdiscards(netif);
846 return pppifOutputOverEthernet(pd, pb);
848 #endif /* PPPOE_SUPPORT */
851 /* Grab an output buffer. */
852 headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
853 if (headMB == NULL) {
854 PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: first alloc fail\n", pd));
855 LINK_STATS_INC(link.memerr);
856 LINK_STATS_INC(link.drop);
857 snmp_inc_ifoutdiscards(netif);
863 * Attempt Van Jacobson header compression if VJ is configured and
864 * this is an IP packet.
866 if (protocol == PPP_IP && pc->vjEnabled) {
867 switch (vj_compress_tcp(&pc->vjComp, pb)) {
870 protocol = PPP_IP_PROTOCOL; */
872 case TYPE_COMPRESSED_TCP:
873 protocol = PPP_VJC_COMP;
875 case TYPE_UNCOMPRESSED_TCP:
876 protocol = PPP_VJC_UNCOMP;
879 PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: bad IP packet\n", pd));
880 LINK_STATS_INC(link.proterr);
881 LINK_STATS_INC(link.drop);
882 snmp_inc_ifoutdiscards(netif);
887 #endif /* VJ_SUPPORT */
891 /* Build the PPP header. */
892 if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
893 tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
896 pc->lastXMit = sys_jiffies();
898 fcsOut = PPP_FCS(fcsOut, PPP_ALLSTATIONS);
899 tailMB = pppAppend(PPP_ALLSTATIONS, tailMB, &pc->outACCM);
900 fcsOut = PPP_FCS(fcsOut, PPP_UI);
901 tailMB = pppAppend(PPP_UI, tailMB, &pc->outACCM);
903 if (!pc->pcomp || protocol > 0xFF) {
904 c = (protocol >> 8) & 0xFF;
905 fcsOut = PPP_FCS(fcsOut, c);
906 tailMB = pppAppend(c, tailMB, &pc->outACCM);
909 fcsOut = PPP_FCS(fcsOut, c);
910 tailMB = pppAppend(c, tailMB, &pc->outACCM);
913 for(p = pb; p; p = p->next) {
917 sPtr = (u_char*)p->payload;
922 /* Update FCS before checking for special characters. */
923 fcsOut = PPP_FCS(fcsOut, c);
925 /* Copy to output buffer escaping special characters. */
926 tailMB = pppAppend(c, tailMB, &pc->outACCM);
930 /* Add FCS and trailing flag. */
932 tailMB = pppAppend(c, tailMB, &pc->outACCM);
933 c = (~fcsOut >> 8) & 0xFF;
934 tailMB = pppAppend(c, tailMB, &pc->outACCM);
935 tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
937 /* If we failed to complete the packet, throw it away. */
939 PPPDEBUG(LOG_WARNING,
940 ("pppifOutput[%d]: Alloc err - dropping proto=%d\n",
943 LINK_STATS_INC(link.memerr);
944 LINK_STATS_INC(link.drop);
945 snmp_inc_ifoutdiscards(netif);
950 PPPDEBUG(LOG_INFO, ("pppifOutput[%d]: proto=0x%"X16_F"\n", pd, protocol));
953 #endif /* PPPOS_SUPPORT */
958 /* Get and set parameters for the given connection.
959 * Return 0 on success, an error code on failure. */
961 pppIOCtl(int pd, int cmd, void *arg)
963 PPPControl *pc = &pppControl[pd];
966 if (pd < 0 || pd >= NUM_PPP) {
970 case PPPCTLG_UPSTATUS: /* Get the PPP up status. */
972 *(int *)arg = (int)(pc->if_up);
977 case PPPCTLS_ERRCODE: /* Set the PPP error code. */
979 pc->errCode = *(int *)arg;
984 case PPPCTLG_ERRCODE: /* Get the PPP error code. */
986 *(int *)arg = (int)(pc->errCode);
992 case PPPCTLG_FD: /* Get the fd associated with the ppp */
994 *(sio_fd_t *)arg = pc->fd;
999 #endif /* PPPOS_SUPPORT */
1010 * Return the Maximum Transmission Unit for the given PPP connection.
1015 PPPControl *pc = &pppControl[pd];
1018 /* Validate parameters. */
1019 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1030 pppWriteOverEthernet(int pd, const u_char *s, int n)
1032 PPPControl *pc = &pppControl[pd];
1035 /* skip address & flags */
1039 LWIP_ASSERT("PPPOE_HDRLEN + n <= 0xffff", PPPOE_HDRLEN + n <= 0xffff);
1040 pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HDRLEN + n), PBUF_RAM);
1042 LINK_STATS_INC(link.memerr);
1043 LINK_STATS_INC(link.proterr);
1044 snmp_inc_ifoutdiscards(&pc->netif);
1045 return PPPERR_ALLOC;
1048 pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
1050 pc->lastXMit = sys_jiffies();
1052 MEMCPY(pb->payload, s, n);
1054 if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
1055 LINK_STATS_INC(link.err);
1056 snmp_inc_ifoutdiscards(&pc->netif);
1057 return PPPERR_DEVICE;
1060 snmp_add_ifoutoctets(&pc->netif, (u16_t)n);
1061 snmp_inc_ifoutucastpkts(&pc->netif);
1062 LINK_STATS_INC(link.xmit);
1065 #endif /* PPPOE_SUPPORT */
1068 * Write n characters to a ppp link.
1069 * RETURN: >= 0 Number of characters written
1070 * -1 Failed to write to device
1073 pppWrite(int pd, const u_char *s, int n)
1075 PPPControl *pc = &pppControl[pd];
1079 struct pbuf *headMB, *tailMB;
1080 #endif /* PPPOS_SUPPORT */
1084 return pppWriteOverEthernet(pd, s, n);
1086 #endif /* PPPOE_SUPPORT */
1089 headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
1090 if (headMB == NULL) {
1091 LINK_STATS_INC(link.memerr);
1092 LINK_STATS_INC(link.proterr);
1093 snmp_inc_ifoutdiscards(&pc->netif);
1094 return PPPERR_ALLOC;
1099 /* If the link has been idle, we'll send a fresh flag character to
1100 * flush any noise. */
1101 if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
1102 tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
1104 pc->lastXMit = sys_jiffies();
1106 fcsOut = PPP_INITFCS;
1107 /* Load output buffer. */
1111 /* Update FCS before checking for special characters. */
1112 fcsOut = PPP_FCS(fcsOut, c);
1114 /* Copy to output buffer escaping special characters. */
1115 tailMB = pppAppend(c, tailMB, &pc->outACCM);
1118 /* Add FCS and trailing flag. */
1120 tailMB = pppAppend(c, tailMB, &pc->outACCM);
1121 c = (~fcsOut >> 8) & 0xFF;
1122 tailMB = pppAppend(c, tailMB, &pc->outACCM);
1123 tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
1125 /* If we failed to complete the packet, throw it away.
1126 * Otherwise send it. */
1128 PPPDEBUG(LOG_WARNING,
1129 ("pppWrite[%d]: Alloc err - dropping pbuf len=%d\n", pd, headMB->len));
1130 /*"pppWrite[%d]: Alloc err - dropping %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
1132 LINK_STATS_INC(link.memerr);
1133 LINK_STATS_INC(link.proterr);
1134 snmp_inc_ifoutdiscards(&pc->netif);
1135 return PPPERR_ALLOC;
1138 PPPDEBUG(LOG_INFO, ("pppWrite[%d]: len=%d\n", pd, headMB->len));
1139 /* "pppWrite[%d]: %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
1141 #endif /* PPPOS_SUPPORT */
1147 * ppp_send_config - configure the transmit characteristics of
1148 * the ppp interface.
1151 ppp_send_config( int unit, u16_t mtu, u32_t asyncmap, int pcomp, int accomp)
1153 PPPControl *pc = &pppControl[unit];
1158 pc->accomp = accomp;
1160 /* Load the ACCM bits for the 32 control codes. */
1161 for (i = 0; i < 32/8; i++) {
1162 pc->outACCM[i] = (u_char)((asyncmap >> (8 * i)) & 0xFF);
1164 PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]: outACCM=%X %X %X %X\n",
1166 pc->outACCM[0], pc->outACCM[1], pc->outACCM[2], pc->outACCM[3]));
1171 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
1174 ppp_set_xaccm(int unit, ext_accm *accm)
1176 SMEMCPY(pppControl[unit].outACCM, accm, sizeof(ext_accm));
1177 PPPDEBUG(LOG_INFO, ("ppp_set_xaccm[%d]: outACCM=%X %X %X %X\n",
1179 pppControl[unit].outACCM[0],
1180 pppControl[unit].outACCM[1],
1181 pppControl[unit].outACCM[2],
1182 pppControl[unit].outACCM[3]));
1187 * ppp_recv_config - configure the receive-side characteristics of
1188 * the ppp interface.
1191 ppp_recv_config( int unit, int mru, u32_t asyncmap, int pcomp, int accomp)
1193 PPPControl *pc = &pppControl[unit];
1195 SYS_ARCH_DECL_PROTECT(lev);
1197 LWIP_UNUSED_ARG(accomp);
1198 LWIP_UNUSED_ARG(pcomp);
1199 LWIP_UNUSED_ARG(mru);
1201 /* Load the ACCM bits for the 32 control codes. */
1202 SYS_ARCH_PROTECT(lev);
1203 for (i = 0; i < 32 / 8; i++) {
1204 /* @todo: does this work? ext_accm has been modified from pppd! */
1205 pc->rx.inACCM[i] = (u_char)(asyncmap >> (i * 8));
1207 SYS_ARCH_UNPROTECT(lev);
1208 PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]: inACCM=%X %X %X %X\n",
1210 pc->rx.inACCM[0], pc->rx.inACCM[1], pc->rx.inACCM[2], pc->rx.inACCM[3]));
1215 * ccp_test - ask kernel whether a given compression method
1216 * is acceptable for use. Returns 1 if the method and parameters
1217 * are OK, 0 if the method is known but the parameters are not OK
1218 * (e.g. code size should be reduced), or -1 if the method is unknown.
1221 ccp_test( int unit, int opt_len, int for_transmit, u_char *opt_ptr)
1223 return 0; /* XXX Currently no compression. */
1227 * ccp_flags_set - inform kernel about the current state of CCP.
1230 ccp_flags_set(int unit, int isopen, int isup)
1236 * ccp_fatal_error - returns 1 if decompression was disabled as a
1237 * result of an error detected after decompression of a packet,
1238 * 0 otherwise. This is necessary because of patent nonsense.
1241 ccp_fatal_error(int unit)
1249 * get_idle_time - return how long the link has been idle.
1252 get_idle_time(int u, struct ppp_idle *ip)
1256 LWIP_UNUSED_ARG(ip);
1263 * Return user specified netmask, modified by any mask we might determine
1264 * for address `addr' (in network byte order).
1265 * Here we scan through the system's list of interfaces, looking for
1266 * any non-point-to-point interfaces which might appear to be on the same
1267 * network as `addr'. If we find any, we OR in their netmask to the
1268 * user-specified netmask.
1276 if (IP_CLASSA(addr)) { /* determine network mask for address class */
1277 nmask = IP_CLASSA_NET;
1278 } else if (IP_CLASSB(addr)) {
1279 nmask = IP_CLASSB_NET;
1281 nmask = IP_CLASSC_NET;
1284 /* class D nets are disallowed by bad_ip_adrs */
1285 mask = subnetMask | htonl(nmask);
1288 * Scan through the system's network interfaces.
1289 * Get each netmask and OR them into our mask.
1296 * sifvjcomp - config tcp header compression
1299 sifvjcomp(int pd, int vjcomp, u8_t cidcomp, u8_t maxcid)
1301 #if PPPOS_SUPPORT && VJ_SUPPORT
1302 PPPControl *pc = &pppControl[pd];
1304 pc->vjEnabled = vjcomp;
1305 pc->vjComp.compressSlot = cidcomp;
1306 pc->vjComp.maxSlotIndex = maxcid;
1307 PPPDEBUG(LOG_INFO, ("sifvjcomp: VJ compress enable=%d slot=%d max slot=%d\n",
1308 vjcomp, cidcomp, maxcid));
1309 #else /* PPPOS_SUPPORT && VJ_SUPPORT */
1310 LWIP_UNUSED_ARG(pd);
1311 LWIP_UNUSED_ARG(vjcomp);
1312 LWIP_UNUSED_ARG(cidcomp);
1313 LWIP_UNUSED_ARG(maxcid);
1314 #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
1320 * pppifNetifInit - netif init callback
1323 pppifNetifInit(struct netif *netif)
1325 netif->name[0] = 'p';
1326 netif->name[1] = 'p';
1327 netif->output = pppifOutput;
1328 netif->mtu = pppMTU((int)(size_t)netif->state);
1329 netif->flags = NETIF_FLAG_POINTTOPOINT | NETIF_FLAG_LINK_UP;
1330 #if LWIP_NETIF_HOSTNAME
1331 /* @todo: Initialize interface hostname */
1332 /* netif_set_hostname(netif, "lwip"); */
1333 #endif /* LWIP_NETIF_HOSTNAME */
1339 * sifup - Config the interface up and enable IP packets to pass.
1344 PPPControl *pc = &pppControl[pd];
1347 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1349 PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
1351 netif_remove(&pc->netif);
1352 if (netif_add(&pc->netif, &pc->addrs.our_ipaddr, &pc->addrs.netmask,
1353 &pc->addrs.his_ipaddr, (void *)(size_t)pd, pppifNetifInit, ip_input)) {
1354 netif_set_up(&pc->netif);
1356 pc->errCode = PPPERR_NONE;
1358 PPPDEBUG(LOG_DEBUG, ("sifup: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
1359 if (pc->linkStatusCB) {
1360 pc->linkStatusCB(pc->linkStatusCtx, pc->errCode, &pc->addrs);
1364 PPPDEBUG(LOG_ERR, ("sifup[%d]: netif_add failed\n", pd));
1372 * sifnpmode - Set the mode for handling packets for a given NP.
1375 sifnpmode(int u, int proto, enum NPmode mode)
1378 LWIP_UNUSED_ARG(proto);
1379 LWIP_UNUSED_ARG(mode);
1384 * sifdown - Config the interface down and disable IP.
1389 PPPControl *pc = &pppControl[pd];
1392 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1394 PPPDEBUG(LOG_WARNING, ("sifdown[%d]: bad parms\n", pd));
1397 /* make sure the netif status callback is called */
1398 netif_set_down(&pc->netif);
1399 netif_remove(&pc->netif);
1400 PPPDEBUG(LOG_DEBUG, ("sifdown: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
1401 if (pc->linkStatusCB) {
1402 pc->linkStatusCB(pc->linkStatusCtx, PPPERR_CONNECT, NULL);
1409 * sifaddr - Config the interface IP addresses and netmask.
1410 * @param pd Interface unit ???
1411 * @param o Our IP address ???
1412 * @param h His IP address ???
1413 * @param m IP subnet mask ???
1414 * @param ns1 Primary DNS
1415 * @param ns2 Secondary DNS
1418 sifaddr( int pd, u32_t o, u32_t h, u32_t m, u32_t ns1, u32_t ns2)
1420 PPPControl *pc = &pppControl[pd];
1423 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1425 PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
1427 SMEMCPY(&pc->addrs.our_ipaddr, &o, sizeof(o));
1428 SMEMCPY(&pc->addrs.his_ipaddr, &h, sizeof(h));
1429 SMEMCPY(&pc->addrs.netmask, &m, sizeof(m));
1430 SMEMCPY(&pc->addrs.dns1, &ns1, sizeof(ns1));
1431 SMEMCPY(&pc->addrs.dns2, &ns2, sizeof(ns2));
1437 * cifaddr - Clear the interface IP addresses, and delete routes
1438 * through the interface if possible.
1439 * @param pd Interface unit ???
1440 * @param o Our IP address ???
1441 * @param h IP broadcast address ???
1444 cifaddr( int pd, u32_t o, u32_t h)
1446 PPPControl *pc = &pppControl[pd];
1451 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1453 PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
1455 IP4_ADDR(&pc->addrs.our_ipaddr, 0,0,0,0);
1456 IP4_ADDR(&pc->addrs.his_ipaddr, 0,0,0,0);
1457 IP4_ADDR(&pc->addrs.netmask, 255,255,255,0);
1458 IP4_ADDR(&pc->addrs.dns1, 0,0,0,0);
1459 IP4_ADDR(&pc->addrs.dns2, 0,0,0,0);
1465 * sifdefaultroute - assign a default route through the address given.
1468 sifdefaultroute(int pd, u32_t l, u32_t g)
1470 PPPControl *pc = &pppControl[pd];
1476 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1478 PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
1480 netif_set_default(&pc->netif);
1483 /* TODO: check how PPP handled the netMask, previously not set by ipSetDefault */
1489 * cifdefaultroute - delete a default route through the address given.
1492 cifdefaultroute(int pd, u32_t l, u32_t g)
1494 PPPControl *pc = &pppControl[pd];
1500 if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
1502 PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
1504 netif_set_default(NULL);
1510 /**********************************/
1511 /*** LOCAL FUNCTION DEFINITIONS ***/
1512 /**********************************/
1514 #if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
1515 /* The main PPP process function. This implements the state machine according
1516 * to section 4 of RFC 1661: The Point-To-Point Protocol. */
1518 pppInputThread(void *arg)
1521 PPPControlRx *pcrx = arg;
1523 while (lcp_phase[pcrx->pd] != PHASE_DEAD) {
1524 count = sio_read(pcrx->fd, pcrx->rxbuf, PPPOS_RX_BUFSIZE);
1526 pppInProc(pcrx, pcrx->rxbuf, count);
1528 /* nothing received, give other tasks a chance to run */
1533 #endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD */
1538 pppOverEthernetInitFailed(int pd)
1545 pc = &pppControl[pd];
1546 pppoe_destroy(&pc->netif);
1549 if(pc->linkStatusCB) {
1550 pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
1555 pppOverEthernetLinkStatusCB(int pd, int up)
1558 PPPDEBUG(LOG_INFO, ("pppOverEthernetLinkStatusCB: unit %d: Connecting\n", pd));
1561 pppOverEthernetInitFailed(pd);
1564 #endif /* PPPOE_SUPPORT */
1567 pppSingleBuf(struct pbuf *p)
1572 if(p->tot_len == p->len) {
1576 q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
1579 ("pppSingleBuf: unable to alloc new buf (%d)\n", p->tot_len));
1580 return p; /* live dangerously */
1583 for(b = p, pl = q->payload; b != NULL; b = b->next) {
1584 MEMCPY(pl, b->payload, b->len);
1593 struct pppInputHeader {
1599 * Pass the processed input packet to the appropriate handler.
1600 * This function and all handlers run in the context of the tcpip_thread
1605 struct pbuf *nb = (struct pbuf *)arg;
1609 pd = ((struct pppInputHeader *)nb->payload)->unit;
1610 protocol = ((struct pppInputHeader *)nb->payload)->proto;
1612 if(pbuf_header(nb, -(int)sizeof(struct pppInputHeader))) {
1613 LWIP_ASSERT("pbuf_header failed\n", 0);
1617 LINK_STATS_INC(link.recv);
1618 snmp_inc_ifinucastpkts(&pppControl[pd].netif);
1619 snmp_add_ifinoctets(&pppControl[pd].netif, nb->tot_len);
1622 * Toss all non-LCP packets unless LCP is OPEN.
1623 * Until we get past the authentication phase, toss all packets
1624 * except LCP, LQR and authentication packets.
1626 if((lcp_phase[pd] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) {
1627 if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) ||
1628 (lcp_phase[pd] != PHASE_AUTHENTICATE)) {
1629 PPPDEBUG(LOG_INFO, ("pppInput: discarding proto 0x%"X16_F" in phase %d\n", protocol, lcp_phase[pd]));
1635 case PPP_VJC_COMP: /* VJ compressed TCP */
1636 #if PPPOS_SUPPORT && VJ_SUPPORT
1637 PPPDEBUG(LOG_INFO, ("pppInput[%d]: vj_comp in pbuf len=%d\n", pd, nb->len));
1639 * Clip off the VJ header and prepend the rebuilt TCP/IP header and
1640 * pass the result to IP.
1642 if ((vj_uncompress_tcp(&nb, &pppControl[pd].vjComp) >= 0) && (pppControl[pd].netif.input)) {
1643 pppControl[pd].netif.input(nb, &pppControl[pd].netif);
1646 /* Something's wrong so drop it. */
1647 PPPDEBUG(LOG_WARNING, ("pppInput[%d]: Dropping VJ compressed\n", pd));
1648 #else /* PPPOS_SUPPORT && VJ_SUPPORT */
1649 /* No handler for this protocol so drop the packet. */
1650 PPPDEBUG(LOG_INFO, ("pppInput[%d]: drop VJ Comp in %d:%s\n", pd, nb->len, nb->payload));
1651 #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
1654 case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
1655 #if PPPOS_SUPPORT && VJ_SUPPORT
1656 PPPDEBUG(LOG_INFO, ("pppInput[%d]: vj_un in pbuf len=%d\n", pd, nb->len));
1658 * Process the TCP/IP header for VJ header compression and then pass
1661 if ((vj_uncompress_uncomp(nb, &pppControl[pd].vjComp) >= 0) && pppControl[pd].netif.input) {
1662 pppControl[pd].netif.input(nb, &pppControl[pd].netif);
1665 /* Something's wrong so drop it. */
1666 PPPDEBUG(LOG_WARNING, ("pppInput[%d]: Dropping VJ uncompressed\n", pd));
1667 #else /* PPPOS_SUPPORT && VJ_SUPPORT */
1668 /* No handler for this protocol so drop the packet. */
1670 ("pppInput[%d]: drop VJ UnComp in %d:.*H\n",
1671 pd, nb->len, LWIP_MIN(nb->len * 2, 40), nb->payload));
1672 #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
1675 case PPP_IP: /* Internet Protocol */
1676 PPPDEBUG(LOG_INFO, ("pppInput[%d]: ip in pbuf len=%d\n", pd, nb->len));
1677 if (pppControl[pd].netif.input) {
1678 pppControl[pd].netif.input(nb, &pppControl[pd].netif);
1684 struct protent *protp;
1688 * Upcall the proper protocol input routine.
1690 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
1691 if (protp->protocol == protocol && protp->enabled_flag) {
1692 PPPDEBUG(LOG_INFO, ("pppInput[%d]: %s len=%d\n", pd, protp->name, nb->len));
1693 nb = pppSingleBuf(nb);
1694 (*protp->input)(pd, nb->payload, nb->len);
1695 PPPDEBUG(LOG_DETAIL, ("pppInput[%d]: packet processed\n", pd));
1700 /* No handler for this protocol so reject the packet. */
1701 PPPDEBUG(LOG_INFO, ("pppInput[%d]: rejecting unsupported proto 0x%"X16_F" len=%d\n", pd, protocol, nb->len));
1702 if (pbuf_header(nb, sizeof(protocol))) {
1703 LWIP_ASSERT("pbuf_header failed\n", 0);
1706 #if BYTE_ORDER == LITTLE_ENDIAN
1707 protocol = htons(protocol);
1708 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
1709 SMEMCPY(nb->payload, &protocol, sizeof(protocol));
1710 lcp_sprotrej(pd, nb->payload, nb->len);
1716 LINK_STATS_INC(link.drop);
1717 snmp_inc_ifindiscards(&pppControl[pd].netif);
1726 * Drop the input packet.
1729 pppFreeCurrentInputPacket(PPPControlRx *pcrx)
1731 if (pcrx->inHead != NULL) {
1732 if (pcrx->inTail && (pcrx->inTail != pcrx->inHead)) {
1733 pbuf_free(pcrx->inTail);
1735 pbuf_free(pcrx->inHead);
1736 pcrx->inHead = NULL;
1738 pcrx->inTail = NULL;
1742 * Drop the input packet and increase error counters.
1745 pppDrop(PPPControlRx *pcrx)
1747 if (pcrx->inHead != NULL) {
1749 PPPDEBUG(LOG_INFO, ("pppDrop: %d:%.*H\n", pcrx->inHead->len, min(60, pcrx->inHead->len * 2), pcrx->inHead->payload));
1751 PPPDEBUG(LOG_INFO, ("pppDrop: pbuf len=%d, addr %p\n", pcrx->inHead->len, (void*)pcrx->inHead));
1753 pppFreeCurrentInputPacket(pcrx);
1755 vj_uncompress_err(&pppControl[pcrx->pd].vjComp);
1756 #endif /* VJ_SUPPORT */
1758 LINK_STATS_INC(link.drop);
1759 snmp_inc_ifindiscards(&pppControl[pcrx->pd].netif);
1762 #if !PPP_INPROC_OWNTHREAD
1763 /** Pass received raw characters to PPPoS to be decoded. This function is
1764 * thread-safe and can be called from a dedicated RX-thread or from a main-loop.
1766 * @param pd PPP descriptor index, returned by pppOpen()
1767 * @param data received data
1768 * @param len length of received data
1771 pppos_input(int pd, u_char* data, int len)
1773 pppInProc(&pppControl[pd].rx, data, len);
1778 * Process a received octet string.
1781 pppInProc(PPPControlRx *pcrx, u_char *s, int l)
1783 struct pbuf *nextNBuf;
1786 SYS_ARCH_DECL_PROTECT(lev);
1788 PPPDEBUG(LOG_DEBUG, ("pppInProc[%d]: got %d bytes\n", pcrx->pd, l));
1792 SYS_ARCH_PROTECT(lev);
1793 escaped = ESCAPE_P(pcrx->inACCM, curChar);
1794 SYS_ARCH_UNPROTECT(lev);
1795 /* Handle special characters. */
1797 /* Check for escape sequences. */
1798 /* XXX Note that this does not handle an escaped 0x5d character which
1799 * would appear as an escape character. Since this is an ASCII ']'
1800 * and there is no reason that I know of to escape it, I won't complicate
1801 * the code to handle this case. GLL */
1802 if (curChar == PPP_ESCAPE) {
1803 pcrx->inEscaped = 1;
1804 /* Check for the flag character. */
1805 } else if (curChar == PPP_FLAG) {
1806 /* If this is just an extra flag character, ignore it. */
1807 if (pcrx->inState <= PDADDRESS) {
1809 /* If we haven't received the packet header, drop what has come in. */
1810 } else if (pcrx->inState < PDDATA) {
1811 PPPDEBUG(LOG_WARNING,
1812 ("pppInProc[%d]: Dropping incomplete packet %d\n",
1813 pcrx->pd, pcrx->inState));
1814 LINK_STATS_INC(link.lenerr);
1816 /* If the fcs is invalid, drop the packet. */
1817 } else if (pcrx->inFCS != PPP_GOODFCS) {
1819 ("pppInProc[%d]: Dropping bad fcs 0x%"X16_F" proto=0x%"X16_F"\n",
1820 pcrx->pd, pcrx->inFCS, pcrx->inProtocol));
1821 /* Note: If you get lots of these, check for UART frame errors or try different baud rate */
1822 LINK_STATS_INC(link.chkerr);
1824 /* Otherwise it's a good packet so pass it on. */
1827 /* Trim off the checksum. */
1828 if(pcrx->inTail->len >= 2) {
1829 pcrx->inTail->len -= 2;
1831 pcrx->inTail->tot_len = pcrx->inTail->len;
1832 if (pcrx->inTail != pcrx->inHead) {
1833 pbuf_cat(pcrx->inHead, pcrx->inTail);
1836 pcrx->inTail->tot_len = pcrx->inTail->len;
1837 if (pcrx->inTail != pcrx->inHead) {
1838 pbuf_cat(pcrx->inHead, pcrx->inTail);
1841 pbuf_realloc(pcrx->inHead, pcrx->inHead->tot_len - 2);
1844 /* Dispatch the packet thereby consuming it. */
1846 /* Packet consumed, release our references. */
1847 pcrx->inHead = NULL;
1848 pcrx->inTail = NULL;
1849 #if PPP_INPROC_MULTITHREADED
1850 if(tcpip_callback_with_block(pppInput, inp, 0) != ERR_OK) {
1851 PPPDEBUG(LOG_ERR, ("pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pcrx->pd));
1853 LINK_STATS_INC(link.drop);
1854 snmp_inc_ifindiscards(&pppControl[pcrx->pd].netif);
1856 #else /* PPP_INPROC_MULTITHREADED */
1858 #endif /* PPP_INPROC_MULTITHREADED */
1861 /* Prepare for a new packet. */
1862 pcrx->inFCS = PPP_INITFCS;
1863 pcrx->inState = PDADDRESS;
1864 pcrx->inEscaped = 0;
1865 /* Other characters are usually control characters that may have
1866 * been inserted by the physical layer so here we just drop them. */
1868 PPPDEBUG(LOG_WARNING,
1869 ("pppInProc[%d]: Dropping ACCM char <%d>\n", pcrx->pd, curChar));
1871 /* Process other characters. */
1873 /* Unencode escaped characters. */
1874 if (pcrx->inEscaped) {
1875 pcrx->inEscaped = 0;
1876 curChar ^= PPP_TRANS;
1879 /* Process character relative to current state. */
1880 switch(pcrx->inState) {
1881 case PDIDLE: /* Idle state - waiting. */
1882 /* Drop the character if it's not 0xff
1883 * we would have processed a flag character above. */
1884 if (curChar != PPP_ALLSTATIONS) {
1889 case PDSTART: /* Process start flag. */
1890 /* Prepare for a new packet. */
1891 pcrx->inFCS = PPP_INITFCS;
1894 case PDADDRESS: /* Process address field. */
1895 if (curChar == PPP_ALLSTATIONS) {
1896 pcrx->inState = PDCONTROL;
1899 /* Else assume compressed address and control fields so
1900 * fall through to get the protocol... */
1901 case PDCONTROL: /* Process control field. */
1902 /* If we don't get a valid control code, restart. */
1903 if (curChar == PPP_UI) {
1904 pcrx->inState = PDPROTOCOL1;
1909 PPPDEBUG(LOG_WARNING,
1910 ("pppInProc[%d]: Invalid control <%d>\n", pcrx->pd, curChar));
1911 pcrx->inState = PDSTART;
1914 case PDPROTOCOL1: /* Process protocol field 1. */
1915 /* If the lower bit is set, this is the end of the protocol
1918 pcrx->inProtocol = curChar;
1919 pcrx->inState = PDDATA;
1921 pcrx->inProtocol = (u_int)curChar << 8;
1922 pcrx->inState = PDPROTOCOL2;
1925 case PDPROTOCOL2: /* Process protocol field 2. */
1926 pcrx->inProtocol |= curChar;
1927 pcrx->inState = PDDATA;
1929 case PDDATA: /* Process data byte. */
1930 /* Make space to receive processed data. */
1931 if (pcrx->inTail == NULL || pcrx->inTail->len == PBUF_POOL_BUFSIZE) {
1932 if (pcrx->inTail != NULL) {
1933 pcrx->inTail->tot_len = pcrx->inTail->len;
1934 if (pcrx->inTail != pcrx->inHead) {
1935 pbuf_cat(pcrx->inHead, pcrx->inTail);
1936 /* give up the inTail reference now */
1937 pcrx->inTail = NULL;
1940 /* If we haven't started a packet, we need a packet header. */
1941 nextNBuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
1942 if (nextNBuf == NULL) {
1943 /* No free buffers. Drop the input packet and let the
1944 * higher layers deal with it. Continue processing
1945 * the received pbuf chain in case a new packet starts. */
1946 PPPDEBUG(LOG_ERR, ("pppInProc[%d]: NO FREE MBUFS!\n", pcrx->pd));
1947 LINK_STATS_INC(link.memerr);
1949 pcrx->inState = PDSTART; /* Wait for flag sequence. */
1952 if (pcrx->inHead == NULL) {
1953 struct pppInputHeader *pih = nextNBuf->payload;
1955 pih->unit = pcrx->pd;
1956 pih->proto = pcrx->inProtocol;
1958 nextNBuf->len += sizeof(*pih);
1960 pcrx->inHead = nextNBuf;
1962 pcrx->inTail = nextNBuf;
1964 /* Load character into buffer. */
1965 ((u_char*)pcrx->inTail->payload)[pcrx->inTail->len++] = curChar;
1969 /* update the frame check sequence number. */
1970 pcrx->inFCS = PPP_FCS(pcrx->inFCS, curChar);
1972 } /* while (l-- > 0), all bytes processed */
1976 #endif /* PPPOS_SUPPORT */
1980 pppInProcOverEthernet(int pd, struct pbuf *pb)
1982 struct pppInputHeader *pih;
1985 if(pb->len < sizeof(inProtocol)) {
1986 PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: too small for protocol field\n"));
1990 inProtocol = (((u8_t *)pb->payload)[0] << 8) | ((u8_t*)pb->payload)[1];
1992 /* make room for pppInputHeader - should not fail */
1993 if (pbuf_header(pb, sizeof(*pih) - sizeof(inProtocol)) != 0) {
1994 PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: could not allocate room for header\n"));
2001 pih->proto = inProtocol;
2003 /* Dispatch the packet thereby consuming it. */
2008 LINK_STATS_INC(link.drop);
2009 snmp_inc_ifindiscards(&pppControl[pd].netif);
2013 #endif /* PPPOE_SUPPORT */
2015 #if LWIP_NETIF_STATUS_CALLBACK
2016 /** Set the status callback of a PPP's netif
2018 * @param pd The PPP descriptor returned by pppOpen()
2019 * @param status_callback pointer to the status callback function
2021 * @see netif_set_status_callback
2024 ppp_set_netif_statuscallback(int pd, netif_status_callback_fn status_callback)
2026 netif_set_status_callback(&pppControl[pd].netif, status_callback);
2028 #endif /* LWIP_NETIF_STATUS_CALLBACK */
2030 #if LWIP_NETIF_LINK_CALLBACK
2031 /** Set the link callback of a PPP's netif
2033 * @param pd The PPP descriptor returned by pppOpen()
2034 * @param link_callback pointer to the link callback function
2036 * @see netif_set_link_callback
2039 ppp_set_netif_linkcallback(int pd, netif_status_callback_fn link_callback)
2041 netif_set_link_callback(&pppControl[pd].netif, link_callback);
2043 #endif /* LWIP_NETIF_LINK_CALLBACK */
2045 #endif /* PPP_SUPPORT */