+++ /dev/null
-/*****************************************************************************
-* ppp.c - Network Point to Point Protocol program file.
-*
-* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
-* portions Copyright (c) 1997 by Global Election Systems Inc.
-*
-* The authors hereby grant permission to use, copy, modify, distribute,
-* and license this software and its documentation for any purpose, provided
-* that existing copyright notices are retained in all copies and that this
-* notice and the following disclaimer are included verbatim in any
-* distributions. No written agreement, license, or royalty fee is required
-* for any of the authorized uses.
-*
-* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
-* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*
-******************************************************************************
-* REVISION HISTORY
-*
-* 03-01-01 Marc Boucher <marc@mbsi.ca>
-* Ported to lwIP.
-* 97-11-05 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
-* Original.
-*****************************************************************************/
-
-/*
- * ppp_defs.h - PPP definitions.
- *
- * if_pppvar.h - private structures and declarations for PPP.
- *
- * Copyright (c) 1994 The Australian National University.
- * All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation is hereby granted, provided that the above copyright
- * notice appears in all copies. This software is provided without any
- * warranty, express or implied. The Australian National University
- * makes no representations about the suitability of this software for
- * any purpose.
- *
- * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
- * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
- * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- *
- * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
- * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
- * OR MODIFICATIONS.
- */
-
-/*
- * if_ppp.h - Point-to-Point Protocol definitions.
- *
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-#include "lwip/opt.h"
-
-#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
-
-#include "ppp_impl.h"
-#include "lwip/ip.h" /* for ip_input() */
-
-#include "pppdebug.h"
-
-#include "randm.h"
-#include "fsm.h"
-#if PAP_SUPPORT
-#include "pap.h"
-#endif /* PAP_SUPPORT */
-#if CHAP_SUPPORT
-#include "chap.h"
-#endif /* CHAP_SUPPORT */
-#include "ipcp.h"
-#include "lcp.h"
-#include "magic.h"
-#include "auth.h"
-#if VJ_SUPPORT
-#include "vj.h"
-#endif /* VJ_SUPPORT */
-#if PPPOE_SUPPORT
-#include "netif/ppp_oe.h"
-#endif /* PPPOE_SUPPORT */
-
-#include "lwip/tcpip.h"
-#include "lwip/api.h"
-#include "lwip/snmp.h"
-
-#include <string.h>
-
-/*************************/
-/*** LOCAL DEFINITIONS ***/
-/*************************/
-
-/** PPP_INPROC_MULTITHREADED==1 call pppInput using tcpip_callback().
- * Set this to 0 if pppInProc is called inside tcpip_thread or with NO_SYS==1.
- * Default is 1 for NO_SYS==0 (multithreaded) and 0 for NO_SYS==1 (single-threaded).
- */
-#ifndef PPP_INPROC_MULTITHREADED
-#define PPP_INPROC_MULTITHREADED (NO_SYS==0)
-#endif
-
-/** PPP_INPROC_OWNTHREAD==1: start a dedicated RX thread per PPP session.
- * Default is 0: call pppos_input() for received raw characters, charcater
- * reception is up to the port */
-#ifndef PPP_INPROC_OWNTHREAD
-#define PPP_INPROC_OWNTHREAD PPP_INPROC_MULTITHREADED
-#endif
-
-#if PPP_INPROC_OWNTHREAD && !PPP_INPROC_MULTITHREADED
- #error "PPP_INPROC_OWNTHREAD needs PPP_INPROC_MULTITHREADED==1"
-#endif
-
-/*
- * The basic PPP frame.
- */
-#define PPP_ADDRESS(p) (((u_char *)(p))[0])
-#define PPP_CONTROL(p) (((u_char *)(p))[1])
-#define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
-
-/* PPP packet parser states. Current state indicates operation yet to be
- * completed. */
-typedef enum {
- PDIDLE = 0, /* Idle state - waiting. */
- PDSTART, /* Process start flag. */
- PDADDRESS, /* Process address field. */
- PDCONTROL, /* Process control field. */
- PDPROTOCOL1, /* Process protocol field 1. */
- PDPROTOCOL2, /* Process protocol field 2. */
- PDDATA /* Process data byte. */
-} PPPDevStates;
-
-#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])
-
-/************************/
-/*** LOCAL DATA TYPES ***/
-/************************/
-
-/** RX buffer size: this may be configured smaller! */
-#ifndef PPPOS_RX_BUFSIZE
-#define PPPOS_RX_BUFSIZE (PPP_MRU + PPP_HDRLEN)
-#endif
-
-typedef struct PPPControlRx_s {
- /** unit number / ppp descriptor */
- int pd;
- /** the rx file descriptor */
- sio_fd_t fd;
- /** receive buffer - encoded data is stored here */
-#if PPP_INPROC_OWNTHREAD
- u_char rxbuf[PPPOS_RX_BUFSIZE];
-#endif /* PPP_INPROC_OWNTHREAD */
-
- /* The input packet. */
- struct pbuf *inHead, *inTail;
-
-#if PPPOS_SUPPORT
- u16_t inProtocol; /* The input protocol code. */
- u16_t inFCS; /* Input Frame Check Sequence value. */
-#endif /* PPPOS_SUPPORT */
- PPPDevStates inState; /* The input process state. */
- char inEscaped; /* Escape next character. */
- ext_accm inACCM; /* Async-Ctl-Char-Map for input. */
-} PPPControlRx;
-
-/*
- * PPP interface control block.
- */
-typedef struct PPPControl_s {
- PPPControlRx rx;
- char openFlag; /* True when in use. */
-#if PPPOE_SUPPORT
- struct netif *ethif;
- struct pppoe_softc *pppoe_sc;
-#endif /* PPPOE_SUPPORT */
- int if_up; /* True when the interface is up. */
- int errCode; /* Code indicating why interface is down. */
-#if PPPOS_SUPPORT
- sio_fd_t fd; /* File device ID of port. */
-#endif /* PPPOS_SUPPORT */
- u16_t mtu; /* Peer's mru */
- int pcomp; /* Does peer accept protocol compression? */
- int accomp; /* Does peer accept addr/ctl compression? */
- u_long lastXMit; /* Time of last transmission. */
- ext_accm outACCM; /* Async-Ctl-Char-Map for output. */
-#if PPPOS_SUPPORT && VJ_SUPPORT
- int vjEnabled; /* Flag indicating VJ compression enabled. */
- struct vjcompress vjComp; /* Van Jacobson compression header. */
-#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
-
- struct netif netif;
-
- struct ppp_addrs addrs;
-
- void (*linkStatusCB)(void *ctx, int errCode, void *arg);
- void *linkStatusCtx;
-
-} PPPControl;
-
-
-/*
- * Ioctl definitions.
- */
-
-struct npioctl {
- int protocol; /* PPP procotol, e.g. PPP_IP */
- enum NPmode mode;
-};
-
-
-
-/***********************************/
-/*** LOCAL FUNCTION DECLARATIONS ***/
-/***********************************/
-#if PPPOS_SUPPORT
-#if PPP_INPROC_OWNTHREAD
-static void pppInputThread(void *arg);
-#endif /* PPP_INPROC_OWNTHREAD */
-static void pppDrop(PPPControlRx *pcrx);
-static void pppInProc(PPPControlRx *pcrx, u_char *s, int l);
-static void pppFreeCurrentInputPacket(PPPControlRx *pcrx);
-#endif /* PPPOS_SUPPORT */
-
-
-/******************************/
-/*** PUBLIC DATA STRUCTURES ***/
-/******************************/
-u_long subnetMask;
-
-static PPPControl pppControl[NUM_PPP]; /* The PPP interface control blocks. */
-
-/*
- * PPP Data Link Layer "protocol" table.
- * One entry per supported protocol.
- * The last entry must be NULL.
- */
-struct protent *ppp_protocols[] = {
- &lcp_protent,
-#if PAP_SUPPORT
- &pap_protent,
-#endif /* PAP_SUPPORT */
-#if CHAP_SUPPORT
- &chap_protent,
-#endif /* CHAP_SUPPORT */
-#if CBCP_SUPPORT
- &cbcp_protent,
-#endif /* CBCP_SUPPORT */
- &ipcp_protent,
-#if CCP_SUPPORT
- &ccp_protent,
-#endif /* CCP_SUPPORT */
- NULL
-};
-
-
-/*
- * Buffers for outgoing packets. This must be accessed only from the appropriate
- * PPP task so that it doesn't need to be protected to avoid collisions.
- */
-u_char outpacket_buf[NUM_PPP][PPP_MRU+PPP_HDRLEN];
-
-
-/*****************************/
-/*** LOCAL DATA STRUCTURES ***/
-/*****************************/
-
-#if PPPOS_SUPPORT
-/*
- * FCS lookup table as calculated by genfcstab.
- * @todo: smaller, slower implementation for lower memory footprint?
- */
-static const u_short fcstab[256] = {
- 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
- 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
- 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
- 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
- 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
- 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
- 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
- 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
- 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
- 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
- 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
- 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
- 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
- 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
- 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
- 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
- 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
- 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
- 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
- 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
- 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
- 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
- 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
- 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
- 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
- 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
- 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
- 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
- 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
- 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
- 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
- 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
-};
-
-/* PPP's Asynchronous-Control-Character-Map. The mask array is used
- * to select the specific bit for a character. */
-static u_char pppACCMMask[] = {
- 0x01,
- 0x02,
- 0x04,
- 0x08,
- 0x10,
- 0x20,
- 0x40,
- 0x80
-};
-
-#if PPP_INPROC_OWNTHREAD
-/** Wake up the task blocked in reading from serial line (if any) */
-static void
-pppRecvWakeup(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppRecvWakeup: unit %d\n", pd));
- if (pppControl[pd].openFlag != 0) {
- sio_read_abort(pppControl[pd].fd);
- }
-}
-#endif /* PPP_INPROC_OWNTHREAD */
-#endif /* PPPOS_SUPPORT */
-
-void
-pppLinkTerminated(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: unit %d\n", pd));
-
-#if PPPOE_SUPPORT
- if (pppControl[pd].ethif) {
- pppoe_disconnect(pppControl[pd].pppoe_sc);
- } else
-#endif /* PPPOE_SUPPORT */
- {
-#if PPPOS_SUPPORT
- PPPControl* pc;
-#if PPP_INPROC_OWNTHREAD
- pppRecvWakeup(pd);
-#endif /* PPP_INPROC_OWNTHREAD */
- pc = &pppControl[pd];
-
- PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
- if (pc->linkStatusCB) {
- pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
- }
-
- pc->openFlag = 0;/**/
-#endif /* PPPOS_SUPPORT */
- }
- PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: finished.\n"));
-}
-
-void
-pppLinkDown(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppLinkDown: unit %d\n", pd));
-
-#if PPPOE_SUPPORT
- if (pppControl[pd].ethif) {
- pppoe_disconnect(pppControl[pd].pppoe_sc);
- } else
-#endif /* PPPOE_SUPPORT */
- {
-#if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
- pppRecvWakeup(pd);
-#endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD*/
- }
-}
-
-/** Initiate LCP open request */
-static void
-pppStart(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppStart: unit %d\n", pd));
- lcp_lowerup(pd);
- lcp_open(pd); /* Start protocol */
- PPPDEBUG(LOG_DEBUG, ("pppStart: finished\n"));
-}
-
-/** LCP close request */
-static void
-pppStop(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppStop: unit %d\n", pd));
- lcp_close(pd, "User request");
-}
-
-/** Called when carrier/link is lost */
-static void
-pppHup(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppHupCB: unit %d\n", pd));
- lcp_lowerdown(pd);
- link_terminated(pd);
-}
-
-/***********************************/
-/*** PUBLIC FUNCTION DEFINITIONS ***/
-/***********************************/
-/* Initialize the PPP subsystem. */
-
-struct ppp_settings ppp_settings;
-
-void
-pppInit(void)
-{
- struct protent *protp;
- int i, j;
-
- memset(&ppp_settings, 0, sizeof(ppp_settings));
- ppp_settings.usepeerdns = 1;
- pppSetAuth(PPPAUTHTYPE_NONE, NULL, NULL);
-
- magicInit();
-
- subnetMask = PP_HTONL(0xffffff00UL);
-
- for (i = 0; i < NUM_PPP; i++) {
- /* Initialize each protocol to the standard option set. */
- for (j = 0; (protp = ppp_protocols[j]) != NULL; ++j) {
- (*protp->init)(i);
- }
- }
-}
-
-void
-pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd)
-{
- switch(authType) {
- case PPPAUTHTYPE_NONE:
- default:
-#ifdef LWIP_PPP_STRICT_PAP_REJECT
- ppp_settings.refuse_pap = 1;
-#else /* LWIP_PPP_STRICT_PAP_REJECT */
- /* some providers request pap and accept an empty login/pw */
- ppp_settings.refuse_pap = 0;
-#endif /* LWIP_PPP_STRICT_PAP_REJECT */
- ppp_settings.refuse_chap = 1;
- break;
-
- case PPPAUTHTYPE_ANY:
- /* Warning: Using PPPAUTHTYPE_ANY might have security consequences.
- * RFC 1994 says:
- *
- * In practice, within or associated with each PPP server, there is a
- * database which associates "user" names with authentication
- * information ("secrets"). It is not anticipated that a particular
- * named user would be authenticated by multiple methods. This would
- * make the user vulnerable to attacks which negotiate the least secure
- * method from among a set (such as PAP rather than CHAP). If the same
- * secret was used, PAP would reveal the secret to be used later with
- * CHAP.
- *
- * Instead, for each user name there should be an indication of exactly
- * one method used to authenticate that user name. If a user needs to
- * make use of different authentication methods under different
- * circumstances, then distinct user names SHOULD be employed, each of
- * which identifies exactly one authentication method.
- *
- */
- ppp_settings.refuse_pap = 0;
- ppp_settings.refuse_chap = 0;
- break;
-
- case PPPAUTHTYPE_PAP:
- ppp_settings.refuse_pap = 0;
- ppp_settings.refuse_chap = 1;
- break;
-
- case PPPAUTHTYPE_CHAP:
- ppp_settings.refuse_pap = 1;
- ppp_settings.refuse_chap = 0;
- break;
- }
-
- if(user) {
- strncpy(ppp_settings.user, user, sizeof(ppp_settings.user)-1);
- ppp_settings.user[sizeof(ppp_settings.user)-1] = '\0';
- } else {
- ppp_settings.user[0] = '\0';
- }
-
- if(passwd) {
- strncpy(ppp_settings.passwd, passwd, sizeof(ppp_settings.passwd)-1);
- ppp_settings.passwd[sizeof(ppp_settings.passwd)-1] = '\0';
- } else {
- ppp_settings.passwd[0] = '\0';
- }
-}
-
-#if PPPOS_SUPPORT
-/** Open a new PPP connection using the given I/O device.
- * This initializes the PPP control block but does not
- * attempt to negotiate the LCP session. If this port
- * connects to a modem, the modem connection must be
- * established before calling this.
- * Return a new PPP connection descriptor on success or
- * an error code (negative) on failure.
- *
- * pppOpen() is directly defined to this function.
- */
-int
-pppOverSerialOpen(sio_fd_t fd, pppLinkStatusCB_fn linkStatusCB, void *linkStatusCtx)
-{
- PPPControl *pc;
- int pd;
-
- if (linkStatusCB == NULL) {
- /* PPP is single-threaded: without a callback,
- * there is no way to know when the link is up. */
- return PPPERR_PARAM;
- }
-
- /* Find a free PPP session descriptor. */
- for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
-
- if (pd >= NUM_PPP) {
- pd = PPPERR_OPEN;
- } else {
- pc = &pppControl[pd];
- /* input pbuf left over from last session? */
- pppFreeCurrentInputPacket(&pc->rx);
- /* @todo: is this correct or do I overwrite something? */
- memset(pc, 0, sizeof(PPPControl));
- pc->rx.pd = pd;
- pc->rx.fd = fd;
-
- pc->openFlag = 1;
- pc->fd = fd;
-
-#if VJ_SUPPORT
- vj_compress_init(&pc->vjComp);
-#endif /* VJ_SUPPORT */
-
- /*
- * Default the in and out accm so that escape and flag characters
- * are always escaped.
- */
- pc->rx.inACCM[15] = 0x60; /* no need to protect since RX is not running */
- pc->outACCM[15] = 0x60;
-
- pc->linkStatusCB = linkStatusCB;
- pc->linkStatusCtx = linkStatusCtx;
-
- /*
- * Start the connection and handle incoming events (packet or timeout).
- */
- PPPDEBUG(LOG_INFO, ("pppOverSerialOpen: unit %d: Connecting\n", pd));
- pppStart(pd);
-#if PPP_INPROC_OWNTHREAD
- sys_thread_new(PPP_THREAD_NAME, pppInputThread, (void*)&pc->rx, PPP_THREAD_STACKSIZE, PPP_THREAD_PRIO);
-#endif /* PPP_INPROC_OWNTHREAD */
- }
-
- return pd;
-}
-#endif /* PPPOS_SUPPORT */
-
-#if PPPOE_SUPPORT
-static void pppOverEthernetLinkStatusCB(int pd, int up);
-
-void
-pppOverEthernetClose(int pd)
-{
- PPPControl* pc = &pppControl[pd];
-
- /* *TJL* There's no lcp_deinit */
- lcp_close(pd, NULL);
-
- pppoe_destroy(&pc->netif);
-}
-
-int pppOverEthernetOpen(struct netif *ethif, const char *service_name, const char *concentrator_name,
- pppLinkStatusCB_fn linkStatusCB, void *linkStatusCtx)
-{
- PPPControl *pc;
- int pd;
-
- LWIP_UNUSED_ARG(service_name);
- LWIP_UNUSED_ARG(concentrator_name);
-
- if (linkStatusCB == NULL) {
- /* PPP is single-threaded: without a callback,
- * there is no way to know when the link is up. */
- return PPPERR_PARAM;
- }
-
- /* Find a free PPP session descriptor. Critical region? */
- for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
- if (pd >= NUM_PPP) {
- pd = PPPERR_OPEN;
- } else {
- pc = &pppControl[pd];
- memset(pc, 0, sizeof(PPPControl));
- pc->openFlag = 1;
- pc->ethif = ethif;
-
- pc->linkStatusCB = linkStatusCB;
- pc->linkStatusCtx = linkStatusCtx;
-
- lcp_wantoptions[pd].mru = PPPOE_MAXMTU;
- lcp_wantoptions[pd].neg_asyncmap = 0;
- lcp_wantoptions[pd].neg_pcompression = 0;
- lcp_wantoptions[pd].neg_accompression = 0;
-
- lcp_allowoptions[pd].mru = PPPOE_MAXMTU;
- lcp_allowoptions[pd].neg_asyncmap = 0;
- lcp_allowoptions[pd].neg_pcompression = 0;
- lcp_allowoptions[pd].neg_accompression = 0;
-
- if(pppoe_create(ethif, pd, pppOverEthernetLinkStatusCB, &pc->pppoe_sc) != ERR_OK) {
- pc->openFlag = 0;
- return PPPERR_OPEN;
- }
-
- pppoe_connect(pc->pppoe_sc);
- }
-
- return pd;
-}
-#endif /* PPPOE_SUPPORT */
-
-
-/* Close a PPP connection and release the descriptor.
- * Any outstanding packets in the queues are dropped.
- * Return 0 on success, an error code on failure. */
-int
-pppClose(int pd)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 0;
-
- PPPDEBUG(LOG_DEBUG, ("pppClose() called\n"));
-
- /* Disconnect */
-#if PPPOE_SUPPORT
- if(pc->ethif) {
- PPPDEBUG(LOG_DEBUG, ("pppClose: unit %d kill_link -> pppStop\n", pd));
- pc->errCode = PPPERR_USER;
- /* This will leave us at PHASE_DEAD. */
- pppStop(pd);
- } else
-#endif /* PPPOE_SUPPORT */
- {
-#if PPPOS_SUPPORT
- PPPDEBUG(LOG_DEBUG, ("pppClose: unit %d kill_link -> pppStop\n", pd));
- pc->errCode = PPPERR_USER;
- /* This will leave us at PHASE_DEAD. */
- pppStop(pd);
-#if PPP_INPROC_OWNTHREAD
- pppRecvWakeup(pd);
-#endif /* PPP_INPROC_OWNTHREAD */
-#endif /* PPPOS_SUPPORT */
- }
-
- return st;
-}
-
-/* This function is called when carrier is lost on the PPP channel. */
-void
-pppSigHUP(int pd)
-{
- PPPDEBUG(LOG_DEBUG, ("pppSigHUP: unit %d sig_hup -> pppHupCB\n", pd));
- pppHup(pd);
-}
-
-#if PPPOS_SUPPORT
-static void
-nPut(PPPControl *pc, struct pbuf *nb)
-{
- struct pbuf *b;
- int c;
-
- for(b = nb; b != NULL; b = b->next) {
- if((c = sio_write(pc->fd, b->payload, b->len)) != b->len) {
- PPPDEBUG(LOG_WARNING,
- ("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));
- LINK_STATS_INC(link.err);
- pc->lastXMit = 0; /* prepend PPP_FLAG to next packet */
- snmp_inc_ifoutdiscards(&pc->netif);
- pbuf_free(nb);
- return;
- }
- }
-
- snmp_add_ifoutoctets(&pc->netif, nb->tot_len);
- snmp_inc_ifoutucastpkts(&pc->netif);
- pbuf_free(nb);
- LINK_STATS_INC(link.xmit);
-}
-
-/*
- * pppAppend - append given character to end of given pbuf. If outACCM
- * is not NULL and the character needs to be escaped, do so.
- * If pbuf is full, append another.
- * Return the current pbuf.
- */
-static struct pbuf *
-pppAppend(u_char c, struct pbuf *nb, ext_accm *outACCM)
-{
- struct pbuf *tb = nb;
-
- /* Make sure there is room for the character and an escape code.
- * Sure we don't quite fill the buffer if the character doesn't
- * get escaped but is one character worth complicating this? */
- /* Note: We assume no packet header. */
- if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
- tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
- if (tb) {
- nb->next = tb;
- } else {
- LINK_STATS_INC(link.memerr);
- }
- nb = tb;
- }
-
- if (nb) {
- if (outACCM && ESCAPE_P(*outACCM, c)) {
- *((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
- *((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
- } else {
- *((u_char*)nb->payload + nb->len++) = c;
- }
- }
-
- return tb;
-}
-#endif /* PPPOS_SUPPORT */
-
-#if PPPOE_SUPPORT
-static err_t
-pppifOutputOverEthernet(int pd, struct pbuf *p)
-{
- PPPControl *pc = &pppControl[pd];
- struct pbuf *pb;
- u_short protocol = PPP_IP;
- int i=0;
- u16_t tot_len;
-
- /* @todo: try to use pbuf_header() here! */
- pb = pbuf_alloc(PBUF_LINK, PPPOE_HDRLEN + sizeof(protocol), PBUF_RAM);
- if(!pb) {
- LINK_STATS_INC(link.memerr);
- LINK_STATS_INC(link.proterr);
- snmp_inc_ifoutdiscards(&pc->netif);
- return ERR_MEM;
- }
-
- pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
-
- pc->lastXMit = sys_jiffies();
-
- if (!pc->pcomp || protocol > 0xFF) {
- *((u_char*)pb->payload + i++) = (protocol >> 8) & 0xFF;
- }
- *((u_char*)pb->payload + i) = protocol & 0xFF;
-
- pbuf_chain(pb, p);
- tot_len = pb->tot_len;
-
- if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
- LINK_STATS_INC(link.err);
- snmp_inc_ifoutdiscards(&pc->netif);
- return PPPERR_DEVICE;
- }
-
- snmp_add_ifoutoctets(&pc->netif, tot_len);
- snmp_inc_ifoutucastpkts(&pc->netif);
- LINK_STATS_INC(link.xmit);
- return ERR_OK;
-}
-#endif /* PPPOE_SUPPORT */
-
-/* Send a packet on the given connection. */
-static err_t
-pppifOutput(struct netif *netif, struct pbuf *pb, ip_addr_t *ipaddr)
-{
- int pd = (int)(size_t)netif->state;
- PPPControl *pc = &pppControl[pd];
-#if PPPOS_SUPPORT
- u_short protocol = PPP_IP;
- u_int fcsOut = PPP_INITFCS;
- struct pbuf *headMB = NULL, *tailMB = NULL, *p;
- u_char c;
-#endif /* PPPOS_SUPPORT */
-
- LWIP_UNUSED_ARG(ipaddr);
-
- /* Validate parameters. */
- /* We let any protocol value go through - it can't hurt us
- * and the peer will just drop it if it's not accepting it. */
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag || !pb) {
- PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: bad parms prot=%d pb=%p\n",
- pd, PPP_IP, pb));
- LINK_STATS_INC(link.opterr);
- LINK_STATS_INC(link.drop);
- snmp_inc_ifoutdiscards(netif);
- return ERR_ARG;
- }
-
- /* Check that the link is up. */
- if (lcp_phase[pd] == PHASE_DEAD) {
- PPPDEBUG(LOG_ERR, ("pppifOutput[%d]: link not up\n", pd));
- LINK_STATS_INC(link.rterr);
- LINK_STATS_INC(link.drop);
- snmp_inc_ifoutdiscards(netif);
- return ERR_RTE;
- }
-
-#if PPPOE_SUPPORT
- if(pc->ethif) {
- return pppifOutputOverEthernet(pd, pb);
- }
-#endif /* PPPOE_SUPPORT */
-
-#if PPPOS_SUPPORT
- /* Grab an output buffer. */
- headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
- if (headMB == NULL) {
- PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: first alloc fail\n", pd));
- LINK_STATS_INC(link.memerr);
- LINK_STATS_INC(link.drop);
- snmp_inc_ifoutdiscards(netif);
- return ERR_MEM;
- }
-
-#if VJ_SUPPORT
- /*
- * Attempt Van Jacobson header compression if VJ is configured and
- * this is an IP packet.
- */
- if (protocol == PPP_IP && pc->vjEnabled) {
- switch (vj_compress_tcp(&pc->vjComp, pb)) {
- case TYPE_IP:
- /* No change...
- protocol = PPP_IP_PROTOCOL; */
- break;
- case TYPE_COMPRESSED_TCP:
- protocol = PPP_VJC_COMP;
- break;
- case TYPE_UNCOMPRESSED_TCP:
- protocol = PPP_VJC_UNCOMP;
- break;
- default:
- PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: bad IP packet\n", pd));
- LINK_STATS_INC(link.proterr);
- LINK_STATS_INC(link.drop);
- snmp_inc_ifoutdiscards(netif);
- pbuf_free(headMB);
- return ERR_VAL;
- }
- }
-#endif /* VJ_SUPPORT */
-
- tailMB = headMB;
-
- /* Build the PPP header. */
- if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
- tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
- }
-
- pc->lastXMit = sys_jiffies();
- if (!pc->accomp) {
- fcsOut = PPP_FCS(fcsOut, PPP_ALLSTATIONS);
- tailMB = pppAppend(PPP_ALLSTATIONS, tailMB, &pc->outACCM);
- fcsOut = PPP_FCS(fcsOut, PPP_UI);
- tailMB = pppAppend(PPP_UI, tailMB, &pc->outACCM);
- }
- if (!pc->pcomp || protocol > 0xFF) {
- c = (protocol >> 8) & 0xFF;
- fcsOut = PPP_FCS(fcsOut, c);
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- }
- c = protocol & 0xFF;
- fcsOut = PPP_FCS(fcsOut, c);
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
-
- /* Load packet. */
- for(p = pb; p; p = p->next) {
- int n;
- u_char *sPtr;
-
- sPtr = (u_char*)p->payload;
- n = p->len;
- while (n-- > 0) {
- c = *sPtr++;
-
- /* Update FCS before checking for special characters. */
- fcsOut = PPP_FCS(fcsOut, c);
-
- /* Copy to output buffer escaping special characters. */
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- }
- }
-
- /* Add FCS and trailing flag. */
- c = ~fcsOut & 0xFF;
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- c = (~fcsOut >> 8) & 0xFF;
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
-
- /* If we failed to complete the packet, throw it away. */
- if (!tailMB) {
- PPPDEBUG(LOG_WARNING,
- ("pppifOutput[%d]: Alloc err - dropping proto=%d\n",
- pd, protocol));
- pbuf_free(headMB);
- LINK_STATS_INC(link.memerr);
- LINK_STATS_INC(link.drop);
- snmp_inc_ifoutdiscards(netif);
- return ERR_MEM;
- }
-
- /* Send it. */
- PPPDEBUG(LOG_INFO, ("pppifOutput[%d]: proto=0x%"X16_F"\n", pd, protocol));
-
- nPut(pc, headMB);
-#endif /* PPPOS_SUPPORT */
-
- return ERR_OK;
-}
-
-/* Get and set parameters for the given connection.
- * Return 0 on success, an error code on failure. */
-int
-pppIOCtl(int pd, int cmd, void *arg)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 0;
-
- if (pd < 0 || pd >= NUM_PPP) {
- st = PPPERR_PARAM;
- } else {
- switch(cmd) {
- case PPPCTLG_UPSTATUS: /* Get the PPP up status. */
- if (arg) {
- *(int *)arg = (int)(pc->if_up);
- } else {
- st = PPPERR_PARAM;
- }
- break;
- case PPPCTLS_ERRCODE: /* Set the PPP error code. */
- if (arg) {
- pc->errCode = *(int *)arg;
- } else {
- st = PPPERR_PARAM;
- }
- break;
- case PPPCTLG_ERRCODE: /* Get the PPP error code. */
- if (arg) {
- *(int *)arg = (int)(pc->errCode);
- } else {
- st = PPPERR_PARAM;
- }
- break;
-#if PPPOS_SUPPORT
- case PPPCTLG_FD: /* Get the fd associated with the ppp */
- if (arg) {
- *(sio_fd_t *)arg = pc->fd;
- } else {
- st = PPPERR_PARAM;
- }
- break;
-#endif /* PPPOS_SUPPORT */
- default:
- st = PPPERR_PARAM;
- break;
- }
- }
-
- return st;
-}
-
-/*
- * Return the Maximum Transmission Unit for the given PPP connection.
- */
-u_short
-pppMTU(int pd)
-{
- PPPControl *pc = &pppControl[pd];
- u_short st;
-
- /* Validate parameters. */
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- } else {
- st = pc->mtu;
- }
-
- return st;
-}
-
-#if PPPOE_SUPPORT
-int
-pppWriteOverEthernet(int pd, const u_char *s, int n)
-{
- PPPControl *pc = &pppControl[pd];
- struct pbuf *pb;
-
- /* skip address & flags */
- s += 2;
- n -= 2;
-
- LWIP_ASSERT("PPPOE_HDRLEN + n <= 0xffff", PPPOE_HDRLEN + n <= 0xffff);
- pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HDRLEN + n), PBUF_RAM);
- if(!pb) {
- LINK_STATS_INC(link.memerr);
- LINK_STATS_INC(link.proterr);
- snmp_inc_ifoutdiscards(&pc->netif);
- return PPPERR_ALLOC;
- }
-
- pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
-
- pc->lastXMit = sys_jiffies();
-
- MEMCPY(pb->payload, s, n);
-
- if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
- LINK_STATS_INC(link.err);
- snmp_inc_ifoutdiscards(&pc->netif);
- return PPPERR_DEVICE;
- }
-
- snmp_add_ifoutoctets(&pc->netif, (u16_t)n);
- snmp_inc_ifoutucastpkts(&pc->netif);
- LINK_STATS_INC(link.xmit);
- return PPPERR_NONE;
-}
-#endif /* PPPOE_SUPPORT */
-
-/*
- * Write n characters to a ppp link.
- * RETURN: >= 0 Number of characters written
- * -1 Failed to write to device
- */
-int
-pppWrite(int pd, const u_char *s, int n)
-{
- PPPControl *pc = &pppControl[pd];
-#if PPPOS_SUPPORT
- u_char c;
- u_int fcsOut;
- struct pbuf *headMB, *tailMB;
-#endif /* PPPOS_SUPPORT */
-
-#if PPPOE_SUPPORT
- if(pc->ethif) {
- return pppWriteOverEthernet(pd, s, n);
- }
-#endif /* PPPOE_SUPPORT */
-
-#if PPPOS_SUPPORT
- headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
- if (headMB == NULL) {
- LINK_STATS_INC(link.memerr);
- LINK_STATS_INC(link.proterr);
- snmp_inc_ifoutdiscards(&pc->netif);
- return PPPERR_ALLOC;
- }
-
- tailMB = headMB;
-
- /* If the link has been idle, we'll send a fresh flag character to
- * flush any noise. */
- if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
- tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
- }
- pc->lastXMit = sys_jiffies();
-
- fcsOut = PPP_INITFCS;
- /* Load output buffer. */
- while (n-- > 0) {
- c = *s++;
-
- /* Update FCS before checking for special characters. */
- fcsOut = PPP_FCS(fcsOut, c);
-
- /* Copy to output buffer escaping special characters. */
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- }
-
- /* Add FCS and trailing flag. */
- c = ~fcsOut & 0xFF;
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- c = (~fcsOut >> 8) & 0xFF;
- tailMB = pppAppend(c, tailMB, &pc->outACCM);
- tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
-
- /* If we failed to complete the packet, throw it away.
- * Otherwise send it. */
- if (!tailMB) {
- PPPDEBUG(LOG_WARNING,
- ("pppWrite[%d]: Alloc err - dropping pbuf len=%d\n", pd, headMB->len));
- /*"pppWrite[%d]: Alloc err - dropping %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
- pbuf_free(headMB);
- LINK_STATS_INC(link.memerr);
- LINK_STATS_INC(link.proterr);
- snmp_inc_ifoutdiscards(&pc->netif);
- return PPPERR_ALLOC;
- }
-
- PPPDEBUG(LOG_INFO, ("pppWrite[%d]: len=%d\n", pd, headMB->len));
- /* "pppWrite[%d]: %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
- nPut(pc, headMB);
-#endif /* PPPOS_SUPPORT */
-
- return PPPERR_NONE;
-}
-
-/*
- * ppp_send_config - configure the transmit characteristics of
- * the ppp interface.
- */
-void
-ppp_send_config( int unit, u16_t mtu, u32_t asyncmap, int pcomp, int accomp)
-{
- PPPControl *pc = &pppControl[unit];
- int i;
-
- pc->mtu = mtu;
- pc->pcomp = pcomp;
- pc->accomp = accomp;
-
- /* Load the ACCM bits for the 32 control codes. */
- for (i = 0; i < 32/8; i++) {
- pc->outACCM[i] = (u_char)((asyncmap >> (8 * i)) & 0xFF);
- }
- PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]: outACCM=%X %X %X %X\n",
- unit,
- pc->outACCM[0], pc->outACCM[1], pc->outACCM[2], pc->outACCM[3]));
-}
-
-
-/*
- * ppp_set_xaccm - set the extended transmit ACCM for the interface.
- */
-void
-ppp_set_xaccm(int unit, ext_accm *accm)
-{
- SMEMCPY(pppControl[unit].outACCM, accm, sizeof(ext_accm));
- PPPDEBUG(LOG_INFO, ("ppp_set_xaccm[%d]: outACCM=%X %X %X %X\n",
- unit,
- pppControl[unit].outACCM[0],
- pppControl[unit].outACCM[1],
- pppControl[unit].outACCM[2],
- pppControl[unit].outACCM[3]));
-}
-
-
-/*
- * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.
- */
-void
-ppp_recv_config( int unit, int mru, u32_t asyncmap, int pcomp, int accomp)
-{
- PPPControl *pc = &pppControl[unit];
- int i;
- SYS_ARCH_DECL_PROTECT(lev);
-
- LWIP_UNUSED_ARG(accomp);
- LWIP_UNUSED_ARG(pcomp);
- LWIP_UNUSED_ARG(mru);
-
- /* Load the ACCM bits for the 32 control codes. */
- SYS_ARCH_PROTECT(lev);
- for (i = 0; i < 32 / 8; i++) {
- /* @todo: does this work? ext_accm has been modified from pppd! */
- pc->rx.inACCM[i] = (u_char)(asyncmap >> (i * 8));
- }
- SYS_ARCH_UNPROTECT(lev);
- PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]: inACCM=%X %X %X %X\n",
- unit,
- pc->rx.inACCM[0], pc->rx.inACCM[1], pc->rx.inACCM[2], pc->rx.inACCM[3]));
-}
-
-#if 0
-/*
- * ccp_test - ask kernel whether a given compression method
- * is acceptable for use. Returns 1 if the method and parameters
- * are OK, 0 if the method is known but the parameters are not OK
- * (e.g. code size should be reduced), or -1 if the method is unknown.
- */
-int
-ccp_test( int unit, int opt_len, int for_transmit, u_char *opt_ptr)
-{
- return 0; /* XXX Currently no compression. */
-}
-
-/*
- * ccp_flags_set - inform kernel about the current state of CCP.
- */
-void
-ccp_flags_set(int unit, int isopen, int isup)
-{
- /* XXX */
-}
-
-/*
- * ccp_fatal_error - returns 1 if decompression was disabled as a
- * result of an error detected after decompression of a packet,
- * 0 otherwise. This is necessary because of patent nonsense.
- */
-int
-ccp_fatal_error(int unit)
-{
- /* XXX */
- return 0;
-}
-#endif
-
-/*
- * get_idle_time - return how long the link has been idle.
- */
-int
-get_idle_time(int u, struct ppp_idle *ip)
-{
- /* XXX */
- LWIP_UNUSED_ARG(u);
- LWIP_UNUSED_ARG(ip);
-
- return 0;
-}
-
-
-/*
- * Return user specified netmask, modified by any mask we might determine
- * for address `addr' (in network byte order).
- * Here we scan through the system's list of interfaces, looking for
- * any non-point-to-point interfaces which might appear to be on the same
- * network as `addr'. If we find any, we OR in their netmask to the
- * user-specified netmask.
- */
-u32_t
-GetMask(u32_t addr)
-{
- u32_t mask, nmask;
-
- addr = htonl(addr);
- if (IP_CLASSA(addr)) { /* determine network mask for address class */
- nmask = IP_CLASSA_NET;
- } else if (IP_CLASSB(addr)) {
- nmask = IP_CLASSB_NET;
- } else {
- nmask = IP_CLASSC_NET;
- }
-
- /* class D nets are disallowed by bad_ip_adrs */
- mask = subnetMask | htonl(nmask);
-
- /* XXX
- * Scan through the system's network interfaces.
- * Get each netmask and OR them into our mask.
- */
-
- return mask;
-}
-
-/*
- * sifvjcomp - config tcp header compression
- */
-int
-sifvjcomp(int pd, int vjcomp, u8_t cidcomp, u8_t maxcid)
-{
-#if PPPOS_SUPPORT && VJ_SUPPORT
- PPPControl *pc = &pppControl[pd];
-
- pc->vjEnabled = vjcomp;
- pc->vjComp.compressSlot = cidcomp;
- pc->vjComp.maxSlotIndex = maxcid;
- PPPDEBUG(LOG_INFO, ("sifvjcomp: VJ compress enable=%d slot=%d max slot=%d\n",
- vjcomp, cidcomp, maxcid));
-#else /* PPPOS_SUPPORT && VJ_SUPPORT */
- LWIP_UNUSED_ARG(pd);
- LWIP_UNUSED_ARG(vjcomp);
- LWIP_UNUSED_ARG(cidcomp);
- LWIP_UNUSED_ARG(maxcid);
-#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
-
- return 0;
-}
-
-/*
- * pppifNetifInit - netif init callback
- */
-static err_t
-pppifNetifInit(struct netif *netif)
-{
- netif->name[0] = 'p';
- netif->name[1] = 'p';
- netif->output = pppifOutput;
- netif->mtu = pppMTU((int)(size_t)netif->state);
- netif->flags = NETIF_FLAG_POINTTOPOINT | NETIF_FLAG_LINK_UP;
-#if LWIP_NETIF_HOSTNAME
- /* @todo: Initialize interface hostname */
- /* netif_set_hostname(netif, "lwip"); */
-#endif /* LWIP_NETIF_HOSTNAME */
- return ERR_OK;
-}
-
-
-/*
- * sifup - Config the interface up and enable IP packets to pass.
- */
-int
-sifup(int pd)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 1;
-
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
- } else {
- netif_remove(&pc->netif);
- if (netif_add(&pc->netif, &pc->addrs.our_ipaddr, &pc->addrs.netmask,
- &pc->addrs.his_ipaddr, (void *)(size_t)pd, pppifNetifInit, ip_input)) {
- netif_set_up(&pc->netif);
- pc->if_up = 1;
- pc->errCode = PPPERR_NONE;
-
- PPPDEBUG(LOG_DEBUG, ("sifup: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
- if (pc->linkStatusCB) {
- pc->linkStatusCB(pc->linkStatusCtx, pc->errCode, &pc->addrs);
- }
- } else {
- st = 0;
- PPPDEBUG(LOG_ERR, ("sifup[%d]: netif_add failed\n", pd));
- }
- }
-
- return st;
-}
-
-/*
- * sifnpmode - Set the mode for handling packets for a given NP.
- */
-int
-sifnpmode(int u, int proto, enum NPmode mode)
-{
- LWIP_UNUSED_ARG(u);
- LWIP_UNUSED_ARG(proto);
- LWIP_UNUSED_ARG(mode);
- return 0;
-}
-
-/*
- * sifdown - Config the interface down and disable IP.
- */
-int
-sifdown(int pd)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 1;
-
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- PPPDEBUG(LOG_WARNING, ("sifdown[%d]: bad parms\n", pd));
- } else {
- pc->if_up = 0;
- /* make sure the netif status callback is called */
- netif_set_down(&pc->netif);
- netif_remove(&pc->netif);
- PPPDEBUG(LOG_DEBUG, ("sifdown: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
- if (pc->linkStatusCB) {
- pc->linkStatusCB(pc->linkStatusCtx, PPPERR_CONNECT, NULL);
- }
- }
- return st;
-}
-
-/**
- * sifaddr - Config the interface IP addresses and netmask.
- * @param pd Interface unit ???
- * @param o Our IP address ???
- * @param h His IP address ???
- * @param m IP subnet mask ???
- * @param ns1 Primary DNS
- * @param ns2 Secondary DNS
- */
-int
-sifaddr( int pd, u32_t o, u32_t h, u32_t m, u32_t ns1, u32_t ns2)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 1;
-
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
- } else {
- SMEMCPY(&pc->addrs.our_ipaddr, &o, sizeof(o));
- SMEMCPY(&pc->addrs.his_ipaddr, &h, sizeof(h));
- SMEMCPY(&pc->addrs.netmask, &m, sizeof(m));
- SMEMCPY(&pc->addrs.dns1, &ns1, sizeof(ns1));
- SMEMCPY(&pc->addrs.dns2, &ns2, sizeof(ns2));
- }
- return st;
-}
-
-/**
- * cifaddr - Clear the interface IP addresses, and delete routes
- * through the interface if possible.
- * @param pd Interface unit ???
- * @param o Our IP address ???
- * @param h IP broadcast address ???
- */
-int
-cifaddr( int pd, u32_t o, u32_t h)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 1;
-
- LWIP_UNUSED_ARG(o);
- LWIP_UNUSED_ARG(h);
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
- } else {
- IP4_ADDR(&pc->addrs.our_ipaddr, 0,0,0,0);
- IP4_ADDR(&pc->addrs.his_ipaddr, 0,0,0,0);
- IP4_ADDR(&pc->addrs.netmask, 255,255,255,0);
- IP4_ADDR(&pc->addrs.dns1, 0,0,0,0);
- IP4_ADDR(&pc->addrs.dns2, 0,0,0,0);
- }
- return st;
-}
-
-/*
- * sifdefaultroute - assign a default route through the address given.
- */
-int
-sifdefaultroute(int pd, u32_t l, u32_t g)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 1;
-
- LWIP_UNUSED_ARG(l);
- LWIP_UNUSED_ARG(g);
-
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
- } else {
- netif_set_default(&pc->netif);
- }
-
- /* TODO: check how PPP handled the netMask, previously not set by ipSetDefault */
-
- return st;
-}
-
-/*
- * cifdefaultroute - delete a default route through the address given.
- */
-int
-cifdefaultroute(int pd, u32_t l, u32_t g)
-{
- PPPControl *pc = &pppControl[pd];
- int st = 1;
-
- LWIP_UNUSED_ARG(l);
- LWIP_UNUSED_ARG(g);
-
- if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
- st = 0;
- PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
- } else {
- netif_set_default(NULL);
- }
-
- return st;
-}
-
-/**********************************/
-/*** LOCAL FUNCTION DEFINITIONS ***/
-/**********************************/
-
-#if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
-/* The main PPP process function. This implements the state machine according
- * to section 4 of RFC 1661: The Point-To-Point Protocol. */
-static void
-pppInputThread(void *arg)
-{
- int count;
- PPPControlRx *pcrx = arg;
-
- while (lcp_phase[pcrx->pd] != PHASE_DEAD) {
- count = sio_read(pcrx->fd, pcrx->rxbuf, PPPOS_RX_BUFSIZE);
- if(count > 0) {
- pppInProc(pcrx, pcrx->rxbuf, count);
- } else {
- /* nothing received, give other tasks a chance to run */
- sys_msleep(1);
- }
- }
-}
-#endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD */
-
-#if PPPOE_SUPPORT
-
-void
-pppOverEthernetInitFailed(int pd)
-{
- PPPControl* pc;
-
- pppHup(pd);
- pppStop(pd);
-
- pc = &pppControl[pd];
- pppoe_destroy(&pc->netif);
- pc->openFlag = 0;
-
- if(pc->linkStatusCB) {
- pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
- }
-}
-
-static void
-pppOverEthernetLinkStatusCB(int pd, int up)
-{
- if(up) {
- PPPDEBUG(LOG_INFO, ("pppOverEthernetLinkStatusCB: unit %d: Connecting\n", pd));
- pppStart(pd);
- } else {
- pppOverEthernetInitFailed(pd);
- }
-}
-#endif /* PPPOE_SUPPORT */
-
-struct pbuf *
-pppSingleBuf(struct pbuf *p)
-{
- struct pbuf *q, *b;
- u_char *pl;
-
- if(p->tot_len == p->len) {
- return p;
- }
-
- q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
- if(!q) {
- PPPDEBUG(LOG_ERR,
- ("pppSingleBuf: unable to alloc new buf (%d)\n", p->tot_len));
- return p; /* live dangerously */
- }
-
- for(b = p, pl = q->payload; b != NULL; b = b->next) {
- MEMCPY(pl, b->payload, b->len);
- pl += b->len;
- }
-
- pbuf_free(p);
-
- return q;
-}
-
-struct pppInputHeader {
- int unit;
- u16_t proto;
-};
-
-/*
- * Pass the processed input packet to the appropriate handler.
- * This function and all handlers run in the context of the tcpip_thread
- */
-static void
-pppInput(void *arg)
-{
- struct pbuf *nb = (struct pbuf *)arg;
- u16_t protocol;
- int pd;
-
- pd = ((struct pppInputHeader *)nb->payload)->unit;
- protocol = ((struct pppInputHeader *)nb->payload)->proto;
-
- if(pbuf_header(nb, -(int)sizeof(struct pppInputHeader))) {
- LWIP_ASSERT("pbuf_header failed\n", 0);
- goto drop;
- }
-
- LINK_STATS_INC(link.recv);
- snmp_inc_ifinucastpkts(&pppControl[pd].netif);
- snmp_add_ifinoctets(&pppControl[pd].netif, nb->tot_len);
-
- /*
- * Toss all non-LCP packets unless LCP is OPEN.
- * Until we get past the authentication phase, toss all packets
- * except LCP, LQR and authentication packets.
- */
- if((lcp_phase[pd] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) {
- if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) ||
- (lcp_phase[pd] != PHASE_AUTHENTICATE)) {
- PPPDEBUG(LOG_INFO, ("pppInput: discarding proto 0x%"X16_F" in phase %d\n", protocol, lcp_phase[pd]));
- goto drop;
- }
- }
-
- switch(protocol) {
- case PPP_VJC_COMP: /* VJ compressed TCP */
-#if PPPOS_SUPPORT && VJ_SUPPORT
- PPPDEBUG(LOG_INFO, ("pppInput[%d]: vj_comp in pbuf len=%d\n", pd, nb->len));
- /*
- * Clip off the VJ header and prepend the rebuilt TCP/IP header and
- * pass the result to IP.
- */
- if ((vj_uncompress_tcp(&nb, &pppControl[pd].vjComp) >= 0) && (pppControl[pd].netif.input)) {
- pppControl[pd].netif.input(nb, &pppControl[pd].netif);
- return;
- }
- /* Something's wrong so drop it. */
- PPPDEBUG(LOG_WARNING, ("pppInput[%d]: Dropping VJ compressed\n", pd));
-#else /* PPPOS_SUPPORT && VJ_SUPPORT */
- /* No handler for this protocol so drop the packet. */
- PPPDEBUG(LOG_INFO, ("pppInput[%d]: drop VJ Comp in %d:%s\n", pd, nb->len, nb->payload));
-#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
- break;
-
- case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
-#if PPPOS_SUPPORT && VJ_SUPPORT
- PPPDEBUG(LOG_INFO, ("pppInput[%d]: vj_un in pbuf len=%d\n", pd, nb->len));
- /*
- * Process the TCP/IP header for VJ header compression and then pass
- * the packet to IP.
- */
- if ((vj_uncompress_uncomp(nb, &pppControl[pd].vjComp) >= 0) && pppControl[pd].netif.input) {
- pppControl[pd].netif.input(nb, &pppControl[pd].netif);
- return;
- }
- /* Something's wrong so drop it. */
- PPPDEBUG(LOG_WARNING, ("pppInput[%d]: Dropping VJ uncompressed\n", pd));
-#else /* PPPOS_SUPPORT && VJ_SUPPORT */
- /* No handler for this protocol so drop the packet. */
- PPPDEBUG(LOG_INFO,
- ("pppInput[%d]: drop VJ UnComp in %d:.*H\n",
- pd, nb->len, LWIP_MIN(nb->len * 2, 40), nb->payload));
-#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
- break;
-
- case PPP_IP: /* Internet Protocol */
- PPPDEBUG(LOG_INFO, ("pppInput[%d]: ip in pbuf len=%d\n", pd, nb->len));
- if (pppControl[pd].netif.input) {
- pppControl[pd].netif.input(nb, &pppControl[pd].netif);
- return;
- }
- break;
-
- default: {
- struct protent *protp;
- int i;
-
- /*
- * Upcall the proper protocol input routine.
- */
- for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
- if (protp->protocol == protocol && protp->enabled_flag) {
- PPPDEBUG(LOG_INFO, ("pppInput[%d]: %s len=%d\n", pd, protp->name, nb->len));
- nb = pppSingleBuf(nb);
- (*protp->input)(pd, nb->payload, nb->len);
- PPPDEBUG(LOG_DETAIL, ("pppInput[%d]: packet processed\n", pd));
- goto out;
- }
- }
-
- /* No handler for this protocol so reject the packet. */
- PPPDEBUG(LOG_INFO, ("pppInput[%d]: rejecting unsupported proto 0x%"X16_F" len=%d\n", pd, protocol, nb->len));
- if (pbuf_header(nb, sizeof(protocol))) {
- LWIP_ASSERT("pbuf_header failed\n", 0);
- goto drop;
- }
-#if BYTE_ORDER == LITTLE_ENDIAN
- protocol = htons(protocol);
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
- SMEMCPY(nb->payload, &protocol, sizeof(protocol));
- lcp_sprotrej(pd, nb->payload, nb->len);
- }
- break;
- }
-
-drop:
- LINK_STATS_INC(link.drop);
- snmp_inc_ifindiscards(&pppControl[pd].netif);
-
-out:
- pbuf_free(nb);
- return;
-}
-
-#if PPPOS_SUPPORT
-/*
- * Drop the input packet.
- */
-static void
-pppFreeCurrentInputPacket(PPPControlRx *pcrx)
-{
- if (pcrx->inHead != NULL) {
- if (pcrx->inTail && (pcrx->inTail != pcrx->inHead)) {
- pbuf_free(pcrx->inTail);
- }
- pbuf_free(pcrx->inHead);
- pcrx->inHead = NULL;
- }
- pcrx->inTail = NULL;
-}
-
-/*
- * Drop the input packet and increase error counters.
- */
-static void
-pppDrop(PPPControlRx *pcrx)
-{
- if (pcrx->inHead != NULL) {
-#if 0
- PPPDEBUG(LOG_INFO, ("pppDrop: %d:%.*H\n", pcrx->inHead->len, min(60, pcrx->inHead->len * 2), pcrx->inHead->payload));
-#endif
- PPPDEBUG(LOG_INFO, ("pppDrop: pbuf len=%d, addr %p\n", pcrx->inHead->len, (void*)pcrx->inHead));
- }
- pppFreeCurrentInputPacket(pcrx);
-#if VJ_SUPPORT
- vj_uncompress_err(&pppControl[pcrx->pd].vjComp);
-#endif /* VJ_SUPPORT */
-
- LINK_STATS_INC(link.drop);
- snmp_inc_ifindiscards(&pppControl[pcrx->pd].netif);
-}
-
-#if !PPP_INPROC_OWNTHREAD
-/** Pass received raw characters to PPPoS to be decoded. This function is
- * thread-safe and can be called from a dedicated RX-thread or from a main-loop.
- *
- * @param pd PPP descriptor index, returned by pppOpen()
- * @param data received data
- * @param len length of received data
- */
-void
-pppos_input(int pd, u_char* data, int len)
-{
- pppInProc(&pppControl[pd].rx, data, len);
-}
-#endif
-
-/**
- * Process a received octet string.
- */
-static void
-pppInProc(PPPControlRx *pcrx, u_char *s, int l)
-{
- struct pbuf *nextNBuf;
- u_char curChar;
- u_char escaped;
- SYS_ARCH_DECL_PROTECT(lev);
-
- PPPDEBUG(LOG_DEBUG, ("pppInProc[%d]: got %d bytes\n", pcrx->pd, l));
- while (l-- > 0) {
- curChar = *s++;
-
- SYS_ARCH_PROTECT(lev);
- escaped = ESCAPE_P(pcrx->inACCM, curChar);
- SYS_ARCH_UNPROTECT(lev);
- /* Handle special characters. */
- if (escaped) {
- /* Check for escape sequences. */
- /* XXX Note that this does not handle an escaped 0x5d character which
- * would appear as an escape character. Since this is an ASCII ']'
- * and there is no reason that I know of to escape it, I won't complicate
- * the code to handle this case. GLL */
- if (curChar == PPP_ESCAPE) {
- pcrx->inEscaped = 1;
- /* Check for the flag character. */
- } else if (curChar == PPP_FLAG) {
- /* If this is just an extra flag character, ignore it. */
- if (pcrx->inState <= PDADDRESS) {
- /* ignore it */;
- /* If we haven't received the packet header, drop what has come in. */
- } else if (pcrx->inState < PDDATA) {
- PPPDEBUG(LOG_WARNING,
- ("pppInProc[%d]: Dropping incomplete packet %d\n",
- pcrx->pd, pcrx->inState));
- LINK_STATS_INC(link.lenerr);
- pppDrop(pcrx);
- /* If the fcs is invalid, drop the packet. */
- } else if (pcrx->inFCS != PPP_GOODFCS) {
- PPPDEBUG(LOG_INFO,
- ("pppInProc[%d]: Dropping bad fcs 0x%"X16_F" proto=0x%"X16_F"\n",
- pcrx->pd, pcrx->inFCS, pcrx->inProtocol));
- /* Note: If you get lots of these, check for UART frame errors or try different baud rate */
- LINK_STATS_INC(link.chkerr);
- pppDrop(pcrx);
- /* Otherwise it's a good packet so pass it on. */
- } else {
- struct pbuf *inp;
- /* Trim off the checksum. */
- if(pcrx->inTail->len >= 2) {
- pcrx->inTail->len -= 2;
-
- pcrx->inTail->tot_len = pcrx->inTail->len;
- if (pcrx->inTail != pcrx->inHead) {
- pbuf_cat(pcrx->inHead, pcrx->inTail);
- }
- } else {
- pcrx->inTail->tot_len = pcrx->inTail->len;
- if (pcrx->inTail != pcrx->inHead) {
- pbuf_cat(pcrx->inHead, pcrx->inTail);
- }
-
- pbuf_realloc(pcrx->inHead, pcrx->inHead->tot_len - 2);
- }
-
- /* Dispatch the packet thereby consuming it. */
- inp = pcrx->inHead;
- /* Packet consumed, release our references. */
- pcrx->inHead = NULL;
- pcrx->inTail = NULL;
-#if PPP_INPROC_MULTITHREADED
- if(tcpip_callback_with_block(pppInput, inp, 0) != ERR_OK) {
- PPPDEBUG(LOG_ERR, ("pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pcrx->pd));
- pbuf_free(inp);
- LINK_STATS_INC(link.drop);
- snmp_inc_ifindiscards(&pppControl[pcrx->pd].netif);
- }
-#else /* PPP_INPROC_MULTITHREADED */
- pppInput(inp);
-#endif /* PPP_INPROC_MULTITHREADED */
- }
-
- /* Prepare for a new packet. */
- pcrx->inFCS = PPP_INITFCS;
- pcrx->inState = PDADDRESS;
- pcrx->inEscaped = 0;
- /* Other characters are usually control characters that may have
- * been inserted by the physical layer so here we just drop them. */
- } else {
- PPPDEBUG(LOG_WARNING,
- ("pppInProc[%d]: Dropping ACCM char <%d>\n", pcrx->pd, curChar));
- }
- /* Process other characters. */
- } else {
- /* Unencode escaped characters. */
- if (pcrx->inEscaped) {
- pcrx->inEscaped = 0;
- curChar ^= PPP_TRANS;
- }
-
- /* Process character relative to current state. */
- switch(pcrx->inState) {
- case PDIDLE: /* Idle state - waiting. */
- /* Drop the character if it's not 0xff
- * we would have processed a flag character above. */
- if (curChar != PPP_ALLSTATIONS) {
- break;
- }
-
- /* Fall through */
- case PDSTART: /* Process start flag. */
- /* Prepare for a new packet. */
- pcrx->inFCS = PPP_INITFCS;
-
- /* Fall through */
- case PDADDRESS: /* Process address field. */
- if (curChar == PPP_ALLSTATIONS) {
- pcrx->inState = PDCONTROL;
- break;
- }
- /* Else assume compressed address and control fields so
- * fall through to get the protocol... */
- case PDCONTROL: /* Process control field. */
- /* If we don't get a valid control code, restart. */
- if (curChar == PPP_UI) {
- pcrx->inState = PDPROTOCOL1;
- break;
- }
-#if 0
- else {
- PPPDEBUG(LOG_WARNING,
- ("pppInProc[%d]: Invalid control <%d>\n", pcrx->pd, curChar));
- pcrx->inState = PDSTART;
- }
-#endif
- case PDPROTOCOL1: /* Process protocol field 1. */
- /* If the lower bit is set, this is the end of the protocol
- * field. */
- if (curChar & 1) {
- pcrx->inProtocol = curChar;
- pcrx->inState = PDDATA;
- } else {
- pcrx->inProtocol = (u_int)curChar << 8;
- pcrx->inState = PDPROTOCOL2;
- }
- break;
- case PDPROTOCOL2: /* Process protocol field 2. */
- pcrx->inProtocol |= curChar;
- pcrx->inState = PDDATA;
- break;
- case PDDATA: /* Process data byte. */
- /* Make space to receive processed data. */
- if (pcrx->inTail == NULL || pcrx->inTail->len == PBUF_POOL_BUFSIZE) {
- if (pcrx->inTail != NULL) {
- pcrx->inTail->tot_len = pcrx->inTail->len;
- if (pcrx->inTail != pcrx->inHead) {
- pbuf_cat(pcrx->inHead, pcrx->inTail);
- /* give up the inTail reference now */
- pcrx->inTail = NULL;
- }
- }
- /* If we haven't started a packet, we need a packet header. */
- nextNBuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
- if (nextNBuf == NULL) {
- /* No free buffers. Drop the input packet and let the
- * higher layers deal with it. Continue processing
- * the received pbuf chain in case a new packet starts. */
- PPPDEBUG(LOG_ERR, ("pppInProc[%d]: NO FREE MBUFS!\n", pcrx->pd));
- LINK_STATS_INC(link.memerr);
- pppDrop(pcrx);
- pcrx->inState = PDSTART; /* Wait for flag sequence. */
- break;
- }
- if (pcrx->inHead == NULL) {
- struct pppInputHeader *pih = nextNBuf->payload;
-
- pih->unit = pcrx->pd;
- pih->proto = pcrx->inProtocol;
-
- nextNBuf->len += sizeof(*pih);
-
- pcrx->inHead = nextNBuf;
- }
- pcrx->inTail = nextNBuf;
- }
- /* Load character into buffer. */
- ((u_char*)pcrx->inTail->payload)[pcrx->inTail->len++] = curChar;
- break;
- }
-
- /* update the frame check sequence number. */
- pcrx->inFCS = PPP_FCS(pcrx->inFCS, curChar);
- }
- } /* while (l-- > 0), all bytes processed */
-
- avRandomize();
-}
-#endif /* PPPOS_SUPPORT */
-
-#if PPPOE_SUPPORT
-void
-pppInProcOverEthernet(int pd, struct pbuf *pb)
-{
- struct pppInputHeader *pih;
- u16_t inProtocol;
-
- if(pb->len < sizeof(inProtocol)) {
- PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: too small for protocol field\n"));
- goto drop;
- }
-
- inProtocol = (((u8_t *)pb->payload)[0] << 8) | ((u8_t*)pb->payload)[1];
-
- /* make room for pppInputHeader - should not fail */
- if (pbuf_header(pb, sizeof(*pih) - sizeof(inProtocol)) != 0) {
- PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: could not allocate room for header\n"));
- goto drop;
- }
-
- pih = pb->payload;
-
- pih->unit = pd;
- pih->proto = inProtocol;
-
- /* Dispatch the packet thereby consuming it. */
- pppInput(pb);
- return;
-
-drop:
- LINK_STATS_INC(link.drop);
- snmp_inc_ifindiscards(&pppControl[pd].netif);
- pbuf_free(pb);
- return;
-}
-#endif /* PPPOE_SUPPORT */
-
-#if LWIP_NETIF_STATUS_CALLBACK
-/** Set the status callback of a PPP's netif
- *
- * @param pd The PPP descriptor returned by pppOpen()
- * @param status_callback pointer to the status callback function
- *
- * @see netif_set_status_callback
- */
-void
-ppp_set_netif_statuscallback(int pd, netif_status_callback_fn status_callback)
-{
- netif_set_status_callback(&pppControl[pd].netif, status_callback);
-}
-#endif /* LWIP_NETIF_STATUS_CALLBACK */
-
-#if LWIP_NETIF_LINK_CALLBACK
-/** Set the link callback of a PPP's netif
- *
- * @param pd The PPP descriptor returned by pppOpen()
- * @param link_callback pointer to the link callback function
- *
- * @see netif_set_link_callback
- */
-void
-ppp_set_netif_linkcallback(int pd, netif_status_callback_fn link_callback)
-{
- netif_set_link_callback(&pppControl[pd].netif, link_callback);
-}
-#endif /* LWIP_NETIF_LINK_CALLBACK */
-
-#endif /* PPP_SUPPORT */
projects / reactos.git / blobdiff