lcpout.c

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00001 /*
00002  * Copyright (C) 2001-2004 by egnite Software GmbH. All rights reserved.
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions
00006  * are met:
00007  *
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the copyright holders nor the names of
00014  *    contributors may be used to endorse or promote products derived
00015  *    from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
00018  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00019  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00020  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
00021  * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00022  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00023  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
00024  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
00025  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00026  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
00027  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00028  * SUCH DAMAGE.
00029  *
00030  * For additional information see http://www.ethernut.de/
00031  *
00032  * -
00033  * Portions are 
00034  * Copyright (c) 1989 by Carnegie Mellon University.
00035  * All rights reserved.
00036  *
00037  * Redistribution and use in source and binary forms are permitted
00038  * provided that the above copyright notice and this paragraph are
00039  * duplicated in all such forms and that any documentation,
00040  * advertising materials, and other materials related to such
00041  * distribution and use acknowledge that the software was developed
00042  * by Carnegie Mellon University.  The name of the
00043  * University may not be used to endorse or promote products derived
00044  * from this software without specific prior written permission.
00045  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
00046  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
00047  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00048  */
00049 
00050 /*
00051  * $Log$
00052  * Revision 1.7  2008/08/11 07:00:30  haraldkipp
00053  * BSD types replaced by stdint types (feature request #1282721).
00054  *
00055  * Revision 1.6  2006/10/08 16:48:22  haraldkipp
00056  * Documentation fixed
00057  *
00058  * Revision 1.5  2005/04/08 15:20:51  olereinhardt
00059  * added <sys/types.h> (__APPLE__) and <netinet/in.h> (__linux__)
00060  * for htons and simmilar.
00061  *
00062  * Revision 1.4  2004/03/08 11:26:57  haraldkipp
00063  * Bugfix, establishing PPP sessions failed.
00064  *
00065  * Revision 1.3  2004/01/30 11:37:58  haraldkipp
00066  * Handle magic number rejects
00067  *
00068  * Revision 1.2  2003/08/14 15:18:41  haraldkipp
00069  * Negotiate local magic
00070  *
00071  * Revision 1.1.1.1  2003/05/09 14:41:34  haraldkipp
00072  * Initial using 3.2.1
00073  *
00074  * Revision 1.2  2003/05/06 18:15:30  harald
00075  * Use async map define
00076  *
00077  * Revision 1.1  2003/03/31 14:53:28  harald
00078  * Prepare release 3.1
00079  *
00080  */
00081 
00082 #include <string.h>
00083 
00084 #include <dev/ppp.h>
00085 #include <sys/types.h>
00086 #include <sys/heap.h>
00087 #include <netinet/in.h>
00088 #include <net/if_var.h>
00089 #include <netinet/if_ppp.h>
00090 #include <netinet/ppp_fsm.h>
00091 #include <net/ppp.h>
00092 
00097 
00098 extern uint32_t new_magic;
00099 
00116 int NutLcpOutput(NUTDEVICE * dev, uint8_t code, uint8_t id, NETBUF * nb)
00117 {
00118     XCPHDR *lcp;
00119 
00120     if ((nb = NutNetBufAlloc(nb, NBAF_NETWORK, sizeof(XCPHDR))) == 0)
00121         return -1;
00122 
00123     lcp = nb->nb_nw.vp;
00124     lcp->xch_code = code;
00125     lcp->xch_id = id;
00126     lcp->xch_len = htons(nb->nb_nw.sz + nb->nb_tp.sz + nb->nb_ap.sz);
00127 
00128     if (NutPppOutput(dev, PPP_LCP, 0, nb) == 0)
00129         NutNetBufFree(nb);
00130 
00131     return 0;
00132 }
00133 
00134 void LcpResetOptions(NUTDEVICE * dev)
00135 {
00136     PPPDCB *dcb = dev->dev_dcb;
00137 
00138     dcb->dcb_compr = 0;
00139     dcb->dcb_auth = PPP_PAP;
00140     dcb->dcb_neg_magic = new_magic;
00141     dcb->dcb_loc_magic = 0;
00142     dcb->dcb_rem_magic = 0;
00143     dcb->dcb_accm = LCP_DEFOPT_ASYNCMAP;
00144     dcb->dcb_loc_mru = 1500;
00145 }
00146 
00147 /*
00148  * Send a Configure-Request.
00149  */
00150 void LcpTxConfReq(NUTDEVICE * dev, uint8_t id, uint8_t rejected)
00151 {
00152     PPPDCB *dcb = dev->dev_dcb;
00153     XCPOPT *xcpo;
00154     NETBUF *nb;
00155 
00156     /*
00157      * Not currently negotiating, reset options.
00158      */
00159     if (dcb->dcb_lcp_state != PPPS_REQSENT && dcb->dcb_lcp_state != PPPS_ACKRCVD && dcb->dcb_lcp_state != PPPS_ACKSENT) {
00160         LcpResetOptions(dev);
00161         dcb->dcb_lcp_naks = 0;
00162     }
00163     dcb->dcb_acked = 0;
00164     dcb->dcb_retries = 0;
00165 
00166     /*
00167      * Create the request.
00168      */
00169     if ((nb = NutNetBufAlloc(0, NBAF_APPLICATION, rejected ? 6 : 12)) != 0) {
00170         xcpo = nb->nb_ap.vp;
00171         xcpo->xcpo_type = LCP_ASYNCMAP;
00172         xcpo->xcpo_len = 6;
00173         xcpo->xcpo_.ul = htonl(LCP_DEFOPT_ASYNCMAP);
00174 
00175         /*
00176          * This is a temporary hack. In the initial version
00177          * we sent the ASYNCMAP only and never expected any
00178          * rejects. The MAGICNUMBER had been added later
00179          * to support echo requests, but some servers reject
00180          * this option. Now we still do not provide full
00181          * reject processing but blindly assume, that the 
00182          * MAGICNUMBER is the rejected option.
00183          */
00184         if (!rejected) {
00185             xcpo = (XCPOPT *) ((char *) xcpo + xcpo->xcpo_len);
00186             xcpo->xcpo_type = LCP_MAGICNUMBER;
00187             xcpo->xcpo_len = 6;
00188             xcpo->xcpo_.ul = dcb->dcb_neg_magic;
00189         }
00190 
00191         NutLcpOutput(dev, XCP_CONFREQ, id, nb);
00192     }
00193 }
00194 
00195 /*
00196  * Send a Protocol-Reject for some protocol.
00197  */
00198 void LcpTxProtRej(NUTDEVICE * dev, uint16_t protocol, NETBUF * nb)
00199 {
00200     PPPDCB *dcb = dev->dev_dcb;
00201     NETBUF *nbr;
00202     uint16_t *sp;
00203 
00204     if ((nbr = NutNetBufAlloc(0, NBAF_APPLICATION, nb->nb_nw.sz)) != 0) {
00205         sp = nbr->nb_ap.vp;
00206         *sp++ = htons(protocol);
00207         memcpy(sp, nb->nb_nw.vp, nb->nb_nw.sz - 2);
00208         NutNetBufFree(nb);
00209         NutLcpOutput(dev, LCP_PROTREJ, ++dcb->dcb_rejid, nbr);
00210     } else {
00211         NutNetBufFree(nb);
00212     }
00213 }
00214 

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