initial commit of lk (little kernel) project
diff --git a/lib/lwip/src/netif/ppp/lcp.h b/lib/lwip/src/netif/ppp/lcp.h
new file mode 100644
index 0000000..3876d39
--- /dev/null
+++ b/lib/lwip/src/netif/ppp/lcp.h
@@ -0,0 +1,169 @@
+/*****************************************************************************
+* lcp.h - Network Link Control Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 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 <glanca@gesn.com>, Global Election Systems Inc.
+* Original derived from BSD codes.
+*****************************************************************************/
+/*
+ * lcp.h - Link Control 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: lcp.h,v 1.1 2003/05/27 14:37:56 jani Exp $
+ */
+
+#ifndef LCP_H
+#define LCP_H
+
+
+/*************************
+*** PUBLIC DEFINITIONS ***
+*************************/
+/*
+ * Options.
+ */
+#define CI_MRU 1 /* Maximum Receive Unit */
+#define CI_ASYNCMAP 2 /* Async Control Character Map */
+#define CI_AUTHTYPE 3 /* Authentication Type */
+#define CI_QUALITY 4 /* Quality Protocol */
+#define CI_MAGICNUMBER 5 /* Magic Number */
+#define CI_PCOMPRESSION 7 /* Protocol Field Compression */
+#define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
+#define CI_CALLBACK 13 /* callback */
+#define CI_MRRU 17 /* max reconstructed receive unit; multilink */
+#define CI_SSNHF 18 /* short sequence numbers for multilink */
+#define CI_EPDISC 19 /* endpoint discriminator */
+
+/*
+ * LCP-specific packet types.
+ */
+#define PROTREJ 8 /* Protocol Reject */
+#define ECHOREQ 9 /* Echo Request */
+#define ECHOREP 10 /* Echo Reply */
+#define DISCREQ 11 /* Discard Request */
+#define CBCP_OPT 6 /* Use callback control protocol */
+
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+
+/*
+ * The state of options is described by an lcp_options structure.
+ */
+typedef struct lcp_options {
+ u_int passive : 1; /* Don't die if we don't get a response */
+ u_int silent : 1; /* Wait for the other end to start first */
+ u_int restart : 1; /* Restart vs. exit after close */
+ u_int neg_mru : 1; /* Negotiate the MRU? */
+ u_int neg_asyncmap : 1; /* Negotiate the async map? */
+ u_int neg_upap : 1; /* Ask for UPAP authentication? */
+ u_int neg_chap : 1; /* Ask for CHAP authentication? */
+ u_int neg_magicnumber : 1; /* Ask for magic number? */
+ u_int neg_pcompression : 1; /* HDLC Protocol Field Compression? */
+ u_int neg_accompression : 1; /* HDLC Address/Control Field Compression? */
+ u_int neg_lqr : 1; /* Negotiate use of Link Quality Reports */
+ u_int neg_cbcp : 1; /* Negotiate use of CBCP */
+#ifdef PPP_MULTILINK
+ u_int neg_mrru : 1; /* Negotiate multilink MRRU */
+ u_int neg_ssnhf : 1; /* Negotiate short sequence numbers */
+ u_int neg_endpoint : 1; /* Negotiate endpoint discriminator */
+#endif
+ u_short mru; /* Value of MRU */
+#ifdef PPP_MULTILINK
+ u_short mrru; /* Value of MRRU, and multilink enable */
+#endif
+ u_char chap_mdtype; /* which MD type (hashing algorithm) */
+ u32_t asyncmap; /* Value of async map */
+ u32_t magicnumber;
+ int numloops; /* Number of loops during magic number neg. */
+ u32_t lqr_period; /* Reporting period for LQR 1/100ths second */
+#ifdef PPP_MULTILINK
+ struct epdisc endpoint; /* endpoint discriminator */
+#endif
+} lcp_options;
+
+/*
+ * Values for phase from BSD pppd.h based on RFC 1661.
+ */
+typedef enum {
+ PHASE_DEAD = 0,
+ PHASE_INITIALIZE,
+ PHASE_ESTABLISH,
+ PHASE_AUTHENTICATE,
+ PHASE_CALLBACK,
+ PHASE_NETWORK,
+ PHASE_TERMINATE
+} LinkPhase;
+
+
+/*****************************
+*** PUBLIC DATA STRUCTURES ***
+*****************************/
+
+extern LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
+extern lcp_options lcp_wantoptions[];
+extern lcp_options lcp_gotoptions[];
+extern lcp_options lcp_allowoptions[];
+extern lcp_options lcp_hisoptions[];
+extern ext_accm xmit_accm[];
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+void lcp_init (int);
+void lcp_open (int);
+void lcp_close (int, char *);
+void lcp_lowerup (int);
+void lcp_lowerdown (int);
+void lcp_sprotrej (int, u_char *, int); /* send protocol reject */
+
+extern struct protent lcp_protent;
+
+/* Default number of times we receive our magic number from the peer
+ before deciding the link is looped-back. */
+#define DEFLOOPBACKFAIL 10
+
+#endif /* LCP_H */
+