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: lcpout.c,v $
00052  * Revision 1.6  2006/10/08 16:48:22  haraldkipp
00053  * Documentation fixed
00054  *
00055  * Revision 1.5  2005/04/08 15:20:51  olereinhardt
00056  * added <sys/types.h> (__APPLE__) and <netinet/in.h> (__linux__)
00057  * for htons and simmilar.
00058  *
00059  * Revision 1.4  2004/03/08 11:26:57  haraldkipp
00060  * Bugfix, establishing PPP sessions failed.
00061  *
00062  * Revision 1.3  2004/01/30 11:37:58  haraldkipp
00063  * Handle magic number rejects
00064  *
00065  * Revision 1.2  2003/08/14 15:18:41  haraldkipp
00066  * Negotiate local magic
00067  *
00068  * Revision 1.1.1.1  2003/05/09 14:41:34  haraldkipp
00069  * Initial using 3.2.1
00070  *
00071  * Revision 1.2  2003/05/06 18:15:30  harald
00072  * Use async map define
00073  *
00074  * Revision 1.1  2003/03/31 14:53:28  harald
00075  * Prepare release 3.1
00076  *
00077  */
00078 
00079 #include <string.h>
00080 
00081 #include <dev/ppp.h>
00082 #include <sys/types.h>
00083 #include <sys/heap.h>
00084 #include <netinet/in.h>
00085 #include <net/if_var.h>
00086 #include <netinet/if_ppp.h>
00087 #include <netinet/ppp_fsm.h>
00088 #include <net/ppp.h>
00089 
00094 
00095 extern u_long new_magic;
00096 
00113 int NutLcpOutput(NUTDEVICE * dev, u_char code, u_char id, NETBUF * nb)
00114 {
00115     XCPHDR *lcp;
00116 
00117     if ((nb = NutNetBufAlloc(nb, NBAF_NETWORK, sizeof(XCPHDR))) == 0)
00118         return -1;
00119 
00120     lcp = nb->nb_nw.vp;
00121     lcp->xch_code = code;
00122     lcp->xch_id = id;
00123     lcp->xch_len = htons(nb->nb_nw.sz + nb->nb_tp.sz + nb->nb_ap.sz);
00124 
00125     if (NutPppOutput(dev, PPP_LCP, 0, nb) == 0)
00126         NutNetBufFree(nb);
00127 
00128     return 0;
00129 }
00130 
00131 void LcpResetOptions(NUTDEVICE * dev)
00132 {
00133     PPPDCB *dcb = dev->dev_dcb;
00134 
00135     dcb->dcb_compr = 0;
00136     dcb->dcb_auth = PPP_PAP;
00137     dcb->dcb_neg_magic = new_magic;
00138     dcb->dcb_loc_magic = 0;
00139     dcb->dcb_rem_magic = 0;
00140     dcb->dcb_accm = LCP_DEFOPT_ASYNCMAP;
00141     dcb->dcb_loc_mru = 1500;
00142 }
00143 
00144 /*
00145  * Send a Configure-Request.
00146  */
00147 void LcpTxConfReq(NUTDEVICE * dev, u_char id, u_char rejected)
00148 {
00149     PPPDCB *dcb = dev->dev_dcb;
00150     XCPOPT *xcpo;
00151     NETBUF *nb;
00152 
00153     /*
00154      * Not currently negotiating, reset options.
00155      */
00156     if (dcb->dcb_lcp_state != PPPS_REQSENT && dcb->dcb_lcp_state != PPPS_ACKRCVD && dcb->dcb_lcp_state != PPPS_ACKSENT) {
00157         LcpResetOptions(dev);
00158         dcb->dcb_lcp_naks = 0;
00159     }
00160     dcb->dcb_acked = 0;
00161     dcb->dcb_retries = 0;
00162 
00163     /*
00164      * Create the request.
00165      */
00166     if ((nb = NutNetBufAlloc(0, NBAF_APPLICATION, rejected ? 6 : 12)) != 0) {
00167         xcpo = nb->nb_ap.vp;
00168         xcpo->xcpo_type = LCP_ASYNCMAP;
00169         xcpo->xcpo_len = 6;
00170         xcpo->xcpo_.ul = htonl(LCP_DEFOPT_ASYNCMAP);
00171 
00172         /*
00173          * This is a temporary hack. In the initial version
00174          * we sent the ASYNCMAP only and never expected any
00175          * rejects. The MAGICNUMBER had been added later
00176          * to support echo requests, but some servers reject
00177          * this option. Now we still do not provide full
00178          * reject processing but blindly assume, that the 
00179          * MAGICNUMBER is the rejected option.
00180          */
00181         if (!rejected) {
00182             xcpo = (XCPOPT *) ((char *) xcpo + xcpo->xcpo_len);
00183             xcpo->xcpo_type = LCP_MAGICNUMBER;
00184             xcpo->xcpo_len = 6;
00185             xcpo->xcpo_.ul = dcb->dcb_neg_magic;
00186         }
00187 
00188         NutLcpOutput(dev, XCP_CONFREQ, id, nb);
00189     }
00190 }
00191 
00192 /*
00193  * Send a Protocol-Reject for some protocol.
00194  */
00195 void LcpTxProtRej(NUTDEVICE * dev, u_short protocol, NETBUF * nb)
00196 {
00197     PPPDCB *dcb = dev->dev_dcb;
00198     NETBUF *nbr;
00199     u_short *sp;
00200 
00201     if ((nbr = NutNetBufAlloc(0, NBAF_APPLICATION, nb->nb_nw.sz)) != 0) {
00202         sp = nbr->nb_ap.vp;
00203         *sp++ = htons(protocol);
00204         memcpy(sp, nb->nb_nw.vp, nb->nb_nw.sz - 2);
00205         NutNetBufFree(nb);
00206         NutLcpOutput(dev, LCP_PROTREJ, ++dcb->dcb_rejid, nbr);
00207     } else {
00208         NutNetBufFree(nb);
00209     }
00210 }
00211 

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