src/include/netif/ppp/ppp_opts.h - third_party/github/STMicroelectronics/stm32_mw_lwip - Git at Google

 /*
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice,
  *    this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
  *
  * This file is part of the lwIP TCP/IP stack.
  *
  */

 #ifndef LWIP_PPP_OPTS_H
 #define LWIP_PPP_OPTS_H

 #include "lwip/opt.h"

 /**
  * PPP_SUPPORT==1: Enable PPP.
  */
 #ifndef PPP_SUPPORT
 #define PPP_SUPPORT                     0
 #endif

 /**
  * PPPOE_SUPPORT==1: Enable PPP Over Ethernet
  */
 #ifndef PPPOE_SUPPORT
 #define PPPOE_SUPPORT                   0
 #endif

 /**
  * PPPOL2TP_SUPPORT==1: Enable PPP Over L2TP
  */
 #ifndef PPPOL2TP_SUPPORT
 #define PPPOL2TP_SUPPORT                0
 #endif

 /**
  * PPPOL2TP_AUTH_SUPPORT==1: Enable PPP Over L2TP Auth (enable MD5 support)
  */
 #ifndef PPPOL2TP_AUTH_SUPPORT
 #define PPPOL2TP_AUTH_SUPPORT           PPPOL2TP_SUPPORT
 #endif

 /**
  * PPPOS_SUPPORT==1: Enable PPP Over Serial
  */
 #ifndef PPPOS_SUPPORT
 #define PPPOS_SUPPORT                   PPP_SUPPORT
 #endif

 /**
  * LWIP_PPP_API==1: Enable PPP API (in pppapi.c)
  */
 #ifndef LWIP_PPP_API
 #define LWIP_PPP_API                    (PPP_SUPPORT && (NO_SYS == 0))
 #endif

 #if PPP_SUPPORT

 /**
  * MEMP_NUM_PPP_PCB: the number of simultaneously active PPP
  * connections (requires the PPP_SUPPORT option)
  */
 #ifndef MEMP_NUM_PPP_PCB
 #define MEMP_NUM_PPP_PCB                1
 #endif

 /**
  * PPP_NUM_TIMEOUTS_PER_PCB: the number of sys_timeouts running in parallel per
  * ppp_pcb. See the detailed explanation at the end of ppp_impl.h about simultaneous
  * timers analysis.
  */
 #ifndef PPP_NUM_TIMEOUTS_PER_PCB
 #define PPP_NUM_TIMEOUTS_PER_PCB        (1 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT)
 #endif

 /* The number of sys_timeouts required for the PPP module */
 #define PPP_NUM_TIMEOUTS                (PPP_SUPPORT * PPP_NUM_TIMEOUTS_PER_PCB * MEMP_NUM_PPP_PCB)

 /**
  * MEMP_NUM_PPPOS_INTERFACES: the number of concurrently active PPPoS
  * interfaces (only used with PPPOS_SUPPORT==1)
  */
 #ifndef MEMP_NUM_PPPOS_INTERFACES
 #define MEMP_NUM_PPPOS_INTERFACES       MEMP_NUM_PPP_PCB
 #endif

 /**
  * MEMP_NUM_PPPOE_INTERFACES: the number of concurrently active PPPoE
  * interfaces (only used with PPPOE_SUPPORT==1)
  */
 #ifndef MEMP_NUM_PPPOE_INTERFACES
 #define MEMP_NUM_PPPOE_INTERFACES       1
 #endif

 /**
  * MEMP_NUM_PPPOL2TP_INTERFACES: the number of concurrently active PPPoL2TP
  * interfaces (only used with PPPOL2TP_SUPPORT==1)
  */
 #ifndef MEMP_NUM_PPPOL2TP_INTERFACES
 #define MEMP_NUM_PPPOL2TP_INTERFACES       1
 #endif

 /**
  * MEMP_NUM_PPP_API_MSG: Number of concurrent PPP API messages (in pppapi.c)
  */
 #ifndef MEMP_NUM_PPP_API_MSG
 #define MEMP_NUM_PPP_API_MSG 5
 #endif

 /**
  * PPP_DEBUG: Enable debugging for PPP.
  */
 #ifndef PPP_DEBUG
 #define PPP_DEBUG                       LWIP_DBG_OFF
 #endif

 /**
  * PPP_INPROC_IRQ_SAFE==1 call pppos_input() using tcpip_callback().
  *
  * Please read the "PPPoS input path" chapter in the PPP documentation about this option.
  */
 #ifndef PPP_INPROC_IRQ_SAFE
 #define PPP_INPROC_IRQ_SAFE             0
 #endif

 /**
  * PRINTPKT_SUPPORT==1: Enable PPP print packet support
  *
  * Mandatory for debugging, it displays exchanged packet content in debug trace.
  */
 #ifndef PRINTPKT_SUPPORT
 #define PRINTPKT_SUPPORT                0
 #endif

 /**
  * PPP_IPV4_SUPPORT==1: Enable PPP IPv4 support
  */
 #ifndef PPP_IPV4_SUPPORT
 #define PPP_IPV4_SUPPORT                (LWIP_IPV4)
 #endif

 /**
  * PPP_IPV6_SUPPORT==1: Enable PPP IPv6 support
  */
 #ifndef PPP_IPV6_SUPPORT
 #define PPP_IPV6_SUPPORT                (LWIP_IPV6)
 #endif

 /**
  * PPP_NOTIFY_PHASE==1: Support PPP notify phase support
  *
  * PPP notify phase support allows you to set a callback which is
  * called on change of the internal PPP state machine.
  *
  * This can be used for example to set a LED pattern depending on the
  * current phase of the PPP session.
  */
 #ifndef PPP_NOTIFY_PHASE
 #define PPP_NOTIFY_PHASE                0
 #endif

 /**
  * pbuf_type PPP is using for LCP, PAP, CHAP, EAP, CCP, IPCP and IP6CP packets.
  *
  * Memory allocated must be single buffered for PPP to works, it requires pbuf
  * that are not going to be chained when allocated. This requires setting
  * PBUF_POOL_BUFSIZE to at least 512 bytes, which is quite huge for small systems.
  *
  * Setting PPP_USE_PBUF_RAM to 1 makes PPP use memory from heap where continuous
  * buffers are required, allowing you to use a smaller PBUF_POOL_BUFSIZE.
  */
 #ifndef PPP_USE_PBUF_RAM
 #define PPP_USE_PBUF_RAM                0
 #endif

 /**
  * PPP_FCS_TABLE: Keep a 256*2 byte table to speed up FCS calculation for PPPoS
  */
 #ifndef PPP_FCS_TABLE
 #define PPP_FCS_TABLE                   1
 #endif

 /**
  * PAP_SUPPORT==1: Support PAP.
  */
 #ifndef PAP_SUPPORT
 #define PAP_SUPPORT                     0
 #endif

 /**
  * CHAP_SUPPORT==1: Support CHAP.
  */
 #ifndef CHAP_SUPPORT
 #define CHAP_SUPPORT                    0
 #endif

 /**
  * MSCHAP_SUPPORT==1: Support MSCHAP.
  */
 #ifndef MSCHAP_SUPPORT
 #define MSCHAP_SUPPORT                  0
 #endif
 #if MSCHAP_SUPPORT
 /* MSCHAP requires CHAP support */
 #undef CHAP_SUPPORT
 #define CHAP_SUPPORT                    1
 #endif /* MSCHAP_SUPPORT */

 /**
  * EAP_SUPPORT==1: Support EAP.
  */
 #ifndef EAP_SUPPORT
 #define EAP_SUPPORT                     0
 #endif

 /**
  * CCP_SUPPORT==1: Support CCP.
  */
 #ifndef CCP_SUPPORT
 #define CCP_SUPPORT                     0
 #endif

 /**
  * MPPE_SUPPORT==1: Support MPPE.
  */
 #ifndef MPPE_SUPPORT
 #define MPPE_SUPPORT                    0
 #endif
 #if MPPE_SUPPORT
 /* MPPE requires CCP support */
 #undef CCP_SUPPORT
 #define CCP_SUPPORT                     1
 /* MPPE requires MSCHAP support */
 #undef MSCHAP_SUPPORT
 #define MSCHAP_SUPPORT                  1
 /* MSCHAP requires CHAP support */
 #undef CHAP_SUPPORT
 #define CHAP_SUPPORT                    1
 #endif /* MPPE_SUPPORT */

 /**
  * CBCP_SUPPORT==1: Support CBCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
  */
 #ifndef CBCP_SUPPORT
 #define CBCP_SUPPORT                    0
 #endif

 /**
  * ECP_SUPPORT==1: Support ECP. CURRENTLY NOT SUPPORTED! DO NOT SET!
  */
 #ifndef ECP_SUPPORT
 #define ECP_SUPPORT                     0
 #endif

 /**
  * DEMAND_SUPPORT==1: Support dial on demand. CURRENTLY NOT SUPPORTED! DO NOT SET!
  */
 #ifndef DEMAND_SUPPORT
 #define DEMAND_SUPPORT                  0
 #endif

 /**
  * LQR_SUPPORT==1: Support Link Quality Report. Do nothing except exchanging some LCP packets.
  */
 #ifndef LQR_SUPPORT
 #define LQR_SUPPORT                     0
 #endif

 /**
  * PPP_SERVER==1: Enable PPP server support (waiting for incoming PPP session).
  *
  * Currently only supported for PPPoS.
  */
 #ifndef PPP_SERVER
 #define PPP_SERVER                      0
 #endif

 #if PPP_SERVER
 /*
  * PPP_OUR_NAME: Our name for authentication purposes
  */
 #ifndef PPP_OUR_NAME
 #define PPP_OUR_NAME                    "lwIP"
 #endif
 #endif /* PPP_SERVER */

 /**
  * VJ_SUPPORT==1: Support VJ header compression.
  */
 #ifndef VJ_SUPPORT
 #define VJ_SUPPORT                      1
 #endif
 /* VJ compression is only supported for TCP over IPv4 over PPPoS. */
 #if !PPPOS_SUPPORT || !PPP_IPV4_SUPPORT || !LWIP_TCP
 #undef VJ_SUPPORT
 #define VJ_SUPPORT                      0
 #endif /* !PPPOS_SUPPORT */

 /**
  * PPP_MD5_RANDM==1: Use MD5 for better randomness.
  * Enabled by default if CHAP, EAP, or L2TP AUTH support is enabled.
  */
 #ifndef PPP_MD5_RANDM
 #define PPP_MD5_RANDM                   (CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT)
 #endif

 /**
  * PolarSSL embedded library
  *
  *
  * lwIP contains some files fetched from the latest BSD release of
  * the PolarSSL project (PolarSSL 0.10.1-bsd) for ciphers and encryption
  * methods we need for lwIP PPP support.
  *
  * The PolarSSL files were cleaned to contain only the necessary struct
  * fields and functions needed for lwIP.
  *
  * The PolarSSL API was not changed at all, so if you are already using
  * PolarSSL you can choose to skip the compilation of the included PolarSSL
  * library into lwIP.
  *
  * If you are not using the embedded copy you must include external
  * libraries into your arch/cc.h port file.
  *
  * Beware of the stack requirements which can be a lot larger if you are not
  * using our cleaned PolarSSL library.
  */

 /**
  * LWIP_USE_EXTERNAL_POLARSSL: Use external PolarSSL library
  */
 #ifndef LWIP_USE_EXTERNAL_POLARSSL
 #define LWIP_USE_EXTERNAL_POLARSSL      0
 #endif

 /**
  * LWIP_USE_EXTERNAL_MBEDTLS: Use external mbed TLS library
  */
 #ifndef LWIP_USE_EXTERNAL_MBEDTLS
 #define LWIP_USE_EXTERNAL_MBEDTLS       0
 #endif

 /*
  * PPP Timeouts
  */

 /**
  * FSM_DEFTIMEOUT: Timeout time in seconds
  */
 #ifndef FSM_DEFTIMEOUT
 #define FSM_DEFTIMEOUT                  6
 #endif

 /**
  * FSM_DEFMAXTERMREQS: Maximum Terminate-Request transmissions
  */
 #ifndef FSM_DEFMAXTERMREQS
 #define FSM_DEFMAXTERMREQS              2
 #endif

 /**
  * FSM_DEFMAXCONFREQS: Maximum Configure-Request transmissions
  */
 #ifndef FSM_DEFMAXCONFREQS
 #define FSM_DEFMAXCONFREQS              10
 #endif

 /**
  * FSM_DEFMAXNAKLOOPS: Maximum number of nak loops
  */
 #ifndef FSM_DEFMAXNAKLOOPS
 #define FSM_DEFMAXNAKLOOPS              5
 #endif

 /**
  * UPAP_DEFTIMEOUT: Timeout (seconds) for retransmitting req
  */
 #ifndef UPAP_DEFTIMEOUT
 #define UPAP_DEFTIMEOUT                 6
 #endif

 /**
  * UPAP_DEFTRANSMITS: Maximum number of auth-reqs to send
  */
 #ifndef UPAP_DEFTRANSMITS
 #define UPAP_DEFTRANSMITS               10
 #endif

 #if PPP_SERVER
 /**
  * UPAP_DEFREQTIME: Time to wait for auth-req from peer
  */
 #ifndef UPAP_DEFREQTIME
 #define UPAP_DEFREQTIME                 30
 #endif
 #endif /* PPP_SERVER */

 /**
  * CHAP_DEFTIMEOUT: Timeout (seconds) for retransmitting req
  */
 #ifndef CHAP_DEFTIMEOUT
 #define CHAP_DEFTIMEOUT                 6
 #endif

 /**
  * CHAP_DEFTRANSMITS: max # times to send challenge
  */
 #ifndef CHAP_DEFTRANSMITS
 #define CHAP_DEFTRANSMITS               10
 #endif

 #if PPP_SERVER
 /**
  * CHAP_DEFRECHALLENGETIME: If this option is > 0, rechallenge the peer every n seconds
  */
 #ifndef CHAP_DEFRECHALLENGETIME
 #define CHAP_DEFRECHALLENGETIME         0
 #endif
 #endif /* PPP_SERVER */

 /**
  * EAP_DEFREQTIME: Time to wait for peer request
  */
 #ifndef EAP_DEFREQTIME
 #define EAP_DEFREQTIME                  6
 #endif

 /**
  * EAP_DEFALLOWREQ: max # times to accept requests
  */
 #ifndef EAP_DEFALLOWREQ
 #define EAP_DEFALLOWREQ                 10
 #endif

 #if PPP_SERVER
 /**
  * EAP_DEFTIMEOUT: Timeout (seconds) for rexmit
  */
 #ifndef EAP_DEFTIMEOUT
 #define EAP_DEFTIMEOUT                  6
 #endif

 /**
  * EAP_DEFTRANSMITS: max # times to transmit
  */
 #ifndef EAP_DEFTRANSMITS
 #define EAP_DEFTRANSMITS                10
 #endif
 #endif /* PPP_SERVER */

 /**
  * LCP_DEFLOOPBACKFAIL: Default number of times we receive our magic number from the peer
  * before deciding the link is looped-back.
  */
 #ifndef LCP_DEFLOOPBACKFAIL
 #define LCP_DEFLOOPBACKFAIL             10
 #endif

 /**
  * LCP_ECHOINTERVAL: Interval in seconds between keepalive echo requests, 0 to disable.
  */
 #ifndef LCP_ECHOINTERVAL
 #define LCP_ECHOINTERVAL                0
 #endif

 /**
  * LCP_MAXECHOFAILS: Number of unanswered echo requests before failure.
  */
 #ifndef LCP_MAXECHOFAILS
 #define LCP_MAXECHOFAILS                3
 #endif

 /**
  * PPP_MAXIDLEFLAG: Max Xmit idle time (in ms) before resend flag char.
  */
 #ifndef PPP_MAXIDLEFLAG
 #define PPP_MAXIDLEFLAG                 100
 #endif

 /**
  * PPP Packet sizes
  */

 /**
  * PPP_MRU: Default MRU
  */
 #ifndef PPP_MRU
 #define PPP_MRU                         1500
 #endif

 /**
  * PPP_DEFMRU: Default MRU to try
  */
 #ifndef PPP_DEFMRU
 #define PPP_DEFMRU                      1500
 #endif

 /**
  * PPP_MAXMRU: Normally limit MRU to this (pppd default = 16384)
  */
 #ifndef PPP_MAXMRU
 #define PPP_MAXMRU                      1500
 #endif

 /**
  * PPP_MINMRU: No MRUs below this
  */
 #ifndef PPP_MINMRU
 #define PPP_MINMRU                      128
 #endif

 /**
  * PPPOL2TP_DEFMRU: Default MTU and MRU for L2TP
  * Default = 1500 - PPPoE(6) - PPP Protocol(2) - IPv4 header(20) - UDP Header(8)
  * - L2TP Header(6) - HDLC Header(2) - PPP Protocol(2) - MPPE Header(2) - PPP Protocol(2)
  */
 #if PPPOL2TP_SUPPORT
 #ifndef PPPOL2TP_DEFMRU
 #define PPPOL2TP_DEFMRU                 1450
 #endif
 #endif /* PPPOL2TP_SUPPORT */

 /**
  * MAXNAMELEN: max length of hostname or name for auth
  */
 #ifndef MAXNAMELEN
 #define MAXNAMELEN                      256
 #endif

 /**
  * MAXSECRETLEN: max length of password or secret
  */
 #ifndef MAXSECRETLEN
 #define MAXSECRETLEN                    256
 #endif

 /* ------------------------------------------------------------------------- */

 /*
  * Build triggers for embedded PolarSSL
  */
 #if !LWIP_USE_EXTERNAL_POLARSSL && !LWIP_USE_EXTERNAL_MBEDTLS

 /* CHAP, EAP, L2TP AUTH and MD5 Random require MD5 support */
 #if CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT || PPP_MD5_RANDM
 #define LWIP_INCLUDED_POLARSSL_MD5      1
 #endif /* CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT || PPP_MD5_RANDM */

 #if MSCHAP_SUPPORT

 /* MSCHAP require MD4 support */
 #define LWIP_INCLUDED_POLARSSL_MD4      1
 /* MSCHAP require SHA1 support */
 #define LWIP_INCLUDED_POLARSSL_SHA1     1
 /* MSCHAP require DES support */
 #define LWIP_INCLUDED_POLARSSL_DES      1

 /* MS-CHAP support is required for MPPE */
 #if MPPE_SUPPORT
 /* MPPE require ARC4 support */
 #define LWIP_INCLUDED_POLARSSL_ARC4     1
 #endif /* MPPE_SUPPORT */

 #endif /* MSCHAP_SUPPORT */

 #endif /* !LWIP_USE_EXTERNAL_POLARSSL && !LWIP_USE_EXTERNAL_MBEDTLS */

 /* Default value if unset */
 #ifndef LWIP_INCLUDED_POLARSSL_MD4
 #define LWIP_INCLUDED_POLARSSL_MD4      0
 #endif /* LWIP_INCLUDED_POLARSSL_MD4 */
 #ifndef LWIP_INCLUDED_POLARSSL_MD5
 #define LWIP_INCLUDED_POLARSSL_MD5      0
 #endif /* LWIP_INCLUDED_POLARSSL_MD5 */
 #ifndef LWIP_INCLUDED_POLARSSL_SHA1
 #define LWIP_INCLUDED_POLARSSL_SHA1     0
 #endif /* LWIP_INCLUDED_POLARSSL_SHA1 */
 #ifndef LWIP_INCLUDED_POLARSSL_DES
 #define LWIP_INCLUDED_POLARSSL_DES      0
 #endif /* LWIP_INCLUDED_POLARSSL_DES */
 #ifndef LWIP_INCLUDED_POLARSSL_ARC4
 #define LWIP_INCLUDED_POLARSSL_ARC4     0
 #endif /* LWIP_INCLUDED_POLARSSL_ARC4 */

 #endif /* PPP_SUPPORT */

 /* Default value if unset */
 #ifndef PPP_NUM_TIMEOUTS
 #define PPP_NUM_TIMEOUTS                0
 #endif /* PPP_NUM_TIMEOUTS */

 #endif /* LWIP_PPP_OPTS_H */
	/*
	* Redistribution and use in source and binary forms, with or without modification,
	* are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
	*
	* This file is part of the lwIP TCP/IP stack.
	*
	*/

	#ifndef LWIP_PPP_OPTS_H
	#define LWIP_PPP_OPTS_H

	#include "lwip/opt.h"

	/**
	* PPP_SUPPORT==1: Enable PPP.
	*/
	#ifndef PPP_SUPPORT
	#define PPP_SUPPORT 0
	#endif

	/**
	* PPPOE_SUPPORT==1: Enable PPP Over Ethernet
	*/
	#ifndef PPPOE_SUPPORT
	#define PPPOE_SUPPORT 0
	#endif

	/**
	* PPPOL2TP_SUPPORT==1: Enable PPP Over L2TP
	*/
	#ifndef PPPOL2TP_SUPPORT
	#define PPPOL2TP_SUPPORT 0
	#endif

	/**
	* PPPOL2TP_AUTH_SUPPORT==1: Enable PPP Over L2TP Auth (enable MD5 support)
	*/
	#ifndef PPPOL2TP_AUTH_SUPPORT
	#define PPPOL2TP_AUTH_SUPPORT PPPOL2TP_SUPPORT
	#endif

	/**
	* PPPOS_SUPPORT==1: Enable PPP Over Serial
	*/
	#ifndef PPPOS_SUPPORT
	#define PPPOS_SUPPORT PPP_SUPPORT
	#endif

	/**
	* LWIP_PPP_API==1: Enable PPP API (in pppapi.c)
	*/
	#ifndef LWIP_PPP_API
	#define LWIP_PPP_API (PPP_SUPPORT && (NO_SYS == 0))
	#endif

	#if PPP_SUPPORT

	/**
	* MEMP_NUM_PPP_PCB: the number of simultaneously active PPP
	* connections (requires the PPP_SUPPORT option)
	*/
	#ifndef MEMP_NUM_PPP_PCB
	#define MEMP_NUM_PPP_PCB 1
	#endif

	/**
	* PPP_NUM_TIMEOUTS_PER_PCB: the number of sys_timeouts running in parallel per
	* ppp_pcb. See the detailed explanation at the end of ppp_impl.h about simultaneous
	* timers analysis.
	*/
	#ifndef PPP_NUM_TIMEOUTS_PER_PCB
	#define PPP_NUM_TIMEOUTS_PER_PCB (1 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT)
	#endif

	/* The number of sys_timeouts required for the PPP module */
	#define PPP_NUM_TIMEOUTS (PPP_SUPPORT * PPP_NUM_TIMEOUTS_PER_PCB * MEMP_NUM_PPP_PCB)

	/**
	* MEMP_NUM_PPPOS_INTERFACES: the number of concurrently active PPPoS
	* interfaces (only used with PPPOS_SUPPORT==1)
	*/
	#ifndef MEMP_NUM_PPPOS_INTERFACES
	#define MEMP_NUM_PPPOS_INTERFACES MEMP_NUM_PPP_PCB
	#endif

	/**
	* MEMP_NUM_PPPOE_INTERFACES: the number of concurrently active PPPoE
	* interfaces (only used with PPPOE_SUPPORT==1)
	*/
	#ifndef MEMP_NUM_PPPOE_INTERFACES
	#define MEMP_NUM_PPPOE_INTERFACES 1
	#endif

	/**
	* MEMP_NUM_PPPOL2TP_INTERFACES: the number of concurrently active PPPoL2TP
	* interfaces (only used with PPPOL2TP_SUPPORT==1)
	*/
	#ifndef MEMP_NUM_PPPOL2TP_INTERFACES
	#define MEMP_NUM_PPPOL2TP_INTERFACES 1
	#endif

	/**
	* MEMP_NUM_PPP_API_MSG: Number of concurrent PPP API messages (in pppapi.c)
	*/
	#ifndef MEMP_NUM_PPP_API_MSG
	#define MEMP_NUM_PPP_API_MSG 5
	#endif

	/**
	* PPP_DEBUG: Enable debugging for PPP.
	*/
	#ifndef PPP_DEBUG
	#define PPP_DEBUG LWIP_DBG_OFF
	#endif

	/**
	* PPP_INPROC_IRQ_SAFE==1 call pppos_input() using tcpip_callback().
	*
	* Please read the "PPPoS input path" chapter in the PPP documentation about this option.
	*/
	#ifndef PPP_INPROC_IRQ_SAFE
	#define PPP_INPROC_IRQ_SAFE 0
	#endif

	/**
	* PRINTPKT_SUPPORT==1: Enable PPP print packet support
	*
	* Mandatory for debugging, it displays exchanged packet content in debug trace.
	*/
	#ifndef PRINTPKT_SUPPORT
	#define PRINTPKT_SUPPORT 0
	#endif

	/**
	* PPP_IPV4_SUPPORT==1: Enable PPP IPv4 support
	*/
	#ifndef PPP_IPV4_SUPPORT
	#define PPP_IPV4_SUPPORT (LWIP_IPV4)
	#endif

	/**
	* PPP_IPV6_SUPPORT==1: Enable PPP IPv6 support
	*/
	#ifndef PPP_IPV6_SUPPORT
	#define PPP_IPV6_SUPPORT (LWIP_IPV6)
	#endif

	/**
	* PPP_NOTIFY_PHASE==1: Support PPP notify phase support
	*
	* PPP notify phase support allows you to set a callback which is
	* called on change of the internal PPP state machine.
	*
	* This can be used for example to set a LED pattern depending on the
	* current phase of the PPP session.
	*/
	#ifndef PPP_NOTIFY_PHASE
	#define PPP_NOTIFY_PHASE 0
	#endif

	/**
	* pbuf_type PPP is using for LCP, PAP, CHAP, EAP, CCP, IPCP and IP6CP packets.
	*
	* Memory allocated must be single buffered for PPP to works, it requires pbuf
	* that are not going to be chained when allocated. This requires setting
	* PBUF_POOL_BUFSIZE to at least 512 bytes, which is quite huge for small systems.
	*
	* Setting PPP_USE_PBUF_RAM to 1 makes PPP use memory from heap where continuous
	* buffers are required, allowing you to use a smaller PBUF_POOL_BUFSIZE.
	*/
	#ifndef PPP_USE_PBUF_RAM
	#define PPP_USE_PBUF_RAM 0
	#endif

	/**
	* PPP_FCS_TABLE: Keep a 256*2 byte table to speed up FCS calculation for PPPoS
	*/
	#ifndef PPP_FCS_TABLE
	#define PPP_FCS_TABLE 1
	#endif

	/**
	* PAP_SUPPORT==1: Support PAP.
	*/
	#ifndef PAP_SUPPORT
	#define PAP_SUPPORT 0
	#endif

	/**
	* CHAP_SUPPORT==1: Support CHAP.
	*/
	#ifndef CHAP_SUPPORT
	#define CHAP_SUPPORT 0
	#endif

	/**
	* MSCHAP_SUPPORT==1: Support MSCHAP.
	*/
	#ifndef MSCHAP_SUPPORT
	#define MSCHAP_SUPPORT 0
	#endif
	#if MSCHAP_SUPPORT
	/* MSCHAP requires CHAP support */
	#undef CHAP_SUPPORT
	#define CHAP_SUPPORT 1
	#endif /* MSCHAP_SUPPORT */

	/**
	* EAP_SUPPORT==1: Support EAP.
	*/
	#ifndef EAP_SUPPORT
	#define EAP_SUPPORT 0
	#endif

	/**
	* CCP_SUPPORT==1: Support CCP.
	*/
	#ifndef CCP_SUPPORT
	#define CCP_SUPPORT 0
	#endif

	/**
	* MPPE_SUPPORT==1: Support MPPE.
	*/
	#ifndef MPPE_SUPPORT
	#define MPPE_SUPPORT 0
	#endif
	#if MPPE_SUPPORT
	/* MPPE requires CCP support */
	#undef CCP_SUPPORT
	#define CCP_SUPPORT 1
	/* MPPE requires MSCHAP support */
	#undef MSCHAP_SUPPORT
	#define MSCHAP_SUPPORT 1
	/* MSCHAP requires CHAP support */
	#undef CHAP_SUPPORT
	#define CHAP_SUPPORT 1
	#endif /* MPPE_SUPPORT */

	/**
	* CBCP_SUPPORT==1: Support CBCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
	*/
	#ifndef CBCP_SUPPORT
	#define CBCP_SUPPORT 0
	#endif

	/**
	* ECP_SUPPORT==1: Support ECP. CURRENTLY NOT SUPPORTED! DO NOT SET!
	*/
	#ifndef ECP_SUPPORT
	#define ECP_SUPPORT 0
	#endif

	/**
	* DEMAND_SUPPORT==1: Support dial on demand. CURRENTLY NOT SUPPORTED! DO NOT SET!
	*/
	#ifndef DEMAND_SUPPORT
	#define DEMAND_SUPPORT 0
	#endif

	/**
	* LQR_SUPPORT==1: Support Link Quality Report. Do nothing except exchanging some LCP packets.
	*/
	#ifndef LQR_SUPPORT
	#define LQR_SUPPORT 0
	#endif

	/**
	* PPP_SERVER==1: Enable PPP server support (waiting for incoming PPP session).
	*
	* Currently only supported for PPPoS.
	*/
	#ifndef PPP_SERVER
	#define PPP_SERVER 0
	#endif

	#if PPP_SERVER
	/*
	* PPP_OUR_NAME: Our name for authentication purposes
	*/
	#ifndef PPP_OUR_NAME
	#define PPP_OUR_NAME "lwIP"
	#endif
	#endif /* PPP_SERVER */

	/**
	* VJ_SUPPORT==1: Support VJ header compression.
	*/
	#ifndef VJ_SUPPORT
	#define VJ_SUPPORT 1
	#endif
	/* VJ compression is only supported for TCP over IPv4 over PPPoS. */
	#if !PPPOS_SUPPORT \|\| !PPP_IPV4_SUPPORT \|\| !LWIP_TCP
	#undef VJ_SUPPORT
	#define VJ_SUPPORT 0
	#endif /* !PPPOS_SUPPORT */

	/**
	* PPP_MD5_RANDM==1: Use MD5 for better randomness.
	* Enabled by default if CHAP, EAP, or L2TP AUTH support is enabled.
	*/
	#ifndef PPP_MD5_RANDM
	#define PPP_MD5_RANDM (CHAP_SUPPORT \|\| EAP_SUPPORT \|\| PPPOL2TP_AUTH_SUPPORT)
	#endif

	/**
	* PolarSSL embedded library
	*
	*
	* lwIP contains some files fetched from the latest BSD release of
	* the PolarSSL project (PolarSSL 0.10.1-bsd) for ciphers and encryption
	* methods we need for lwIP PPP support.
	*
	* The PolarSSL files were cleaned to contain only the necessary struct
	* fields and functions needed for lwIP.
	*
	* The PolarSSL API was not changed at all, so if you are already using
	* PolarSSL you can choose to skip the compilation of the included PolarSSL
	* library into lwIP.
	*
	* If you are not using the embedded copy you must include external
	* libraries into your arch/cc.h port file.
	*
	* Beware of the stack requirements which can be a lot larger if you are not
	* using our cleaned PolarSSL library.
	*/

	/**
	* LWIP_USE_EXTERNAL_POLARSSL: Use external PolarSSL library
	*/
	#ifndef LWIP_USE_EXTERNAL_POLARSSL
	#define LWIP_USE_EXTERNAL_POLARSSL 0
	#endif

	/**
	* LWIP_USE_EXTERNAL_MBEDTLS: Use external mbed TLS library
	*/
	#ifndef LWIP_USE_EXTERNAL_MBEDTLS
	#define LWIP_USE_EXTERNAL_MBEDTLS 0
	#endif

	/*
	* PPP Timeouts
	*/

	/**
	* FSM_DEFTIMEOUT: Timeout time in seconds
	*/
	#ifndef FSM_DEFTIMEOUT
	#define FSM_DEFTIMEOUT 6
	#endif

	/**
	* FSM_DEFMAXTERMREQS: Maximum Terminate-Request transmissions
	*/
	#ifndef FSM_DEFMAXTERMREQS
	#define FSM_DEFMAXTERMREQS 2
	#endif

	/**
	* FSM_DEFMAXCONFREQS: Maximum Configure-Request transmissions
	*/
	#ifndef FSM_DEFMAXCONFREQS
	#define FSM_DEFMAXCONFREQS 10
	#endif

	/**
	* FSM_DEFMAXNAKLOOPS: Maximum number of nak loops
	*/
	#ifndef FSM_DEFMAXNAKLOOPS
	#define FSM_DEFMAXNAKLOOPS 5
	#endif

	/**
	* UPAP_DEFTIMEOUT: Timeout (seconds) for retransmitting req
	*/
	#ifndef UPAP_DEFTIMEOUT
	#define UPAP_DEFTIMEOUT 6
	#endif

	/**
	* UPAP_DEFTRANSMITS: Maximum number of auth-reqs to send
	*/
	#ifndef UPAP_DEFTRANSMITS
	#define UPAP_DEFTRANSMITS 10
	#endif

	#if PPP_SERVER
	/**
	* UPAP_DEFREQTIME: Time to wait for auth-req from peer
	*/
	#ifndef UPAP_DEFREQTIME
	#define UPAP_DEFREQTIME 30
	#endif
	#endif /* PPP_SERVER */

	/**
	* CHAP_DEFTIMEOUT: Timeout (seconds) for retransmitting req
	*/
	#ifndef CHAP_DEFTIMEOUT
	#define CHAP_DEFTIMEOUT 6
	#endif

	/**
	* CHAP_DEFTRANSMITS: max # times to send challenge
	*/
	#ifndef CHAP_DEFTRANSMITS
	#define CHAP_DEFTRANSMITS 10
	#endif

	#if PPP_SERVER
	/**
	* CHAP_DEFRECHALLENGETIME: If this option is > 0, rechallenge the peer every n seconds
	*/
	#ifndef CHAP_DEFRECHALLENGETIME
	#define CHAP_DEFRECHALLENGETIME 0
	#endif
	#endif /* PPP_SERVER */

	/**
	* EAP_DEFREQTIME: Time to wait for peer request
	*/
	#ifndef EAP_DEFREQTIME
	#define EAP_DEFREQTIME 6
	#endif

	/**
	* EAP_DEFALLOWREQ: max # times to accept requests
	*/
	#ifndef EAP_DEFALLOWREQ
	#define EAP_DEFALLOWREQ 10
	#endif

	#if PPP_SERVER
	/**
	* EAP_DEFTIMEOUT: Timeout (seconds) for rexmit
	*/
	#ifndef EAP_DEFTIMEOUT
	#define EAP_DEFTIMEOUT 6
	#endif

	/**
	* EAP_DEFTRANSMITS: max # times to transmit
	*/
	#ifndef EAP_DEFTRANSMITS
	#define EAP_DEFTRANSMITS 10
	#endif
	#endif /* PPP_SERVER */

	/**
	* LCP_DEFLOOPBACKFAIL: Default number of times we receive our magic number from the peer
	* before deciding the link is looped-back.
	*/
	#ifndef LCP_DEFLOOPBACKFAIL
	#define LCP_DEFLOOPBACKFAIL 10
	#endif

	/**
	* LCP_ECHOINTERVAL: Interval in seconds between keepalive echo requests, 0 to disable.
	*/
	#ifndef LCP_ECHOINTERVAL
	#define LCP_ECHOINTERVAL 0
	#endif

	/**
	* LCP_MAXECHOFAILS: Number of unanswered echo requests before failure.
	*/
	#ifndef LCP_MAXECHOFAILS
	#define LCP_MAXECHOFAILS 3
	#endif

	/**
	* PPP_MAXIDLEFLAG: Max Xmit idle time (in ms) before resend flag char.
	*/
	#ifndef PPP_MAXIDLEFLAG
	#define PPP_MAXIDLEFLAG 100
	#endif

	/**
	* PPP Packet sizes
	*/

	/**
	* PPP_MRU: Default MRU
	*/
	#ifndef PPP_MRU
	#define PPP_MRU 1500
	#endif

	/**
	* PPP_DEFMRU: Default MRU to try
	*/
	#ifndef PPP_DEFMRU
	#define PPP_DEFMRU 1500
	#endif

	/**
	* PPP_MAXMRU: Normally limit MRU to this (pppd default = 16384)
	*/
	#ifndef PPP_MAXMRU
	#define PPP_MAXMRU 1500
	#endif

	/**
	* PPP_MINMRU: No MRUs below this
	*/
	#ifndef PPP_MINMRU
	#define PPP_MINMRU 128
	#endif

	/**
	* PPPOL2TP_DEFMRU: Default MTU and MRU for L2TP
	* Default = 1500 - PPPoE(6) - PPP Protocol(2) - IPv4 header(20) - UDP Header(8)
	* - L2TP Header(6) - HDLC Header(2) - PPP Protocol(2) - MPPE Header(2) - PPP Protocol(2)
	*/
	#if PPPOL2TP_SUPPORT
	#ifndef PPPOL2TP_DEFMRU
	#define PPPOL2TP_DEFMRU 1450
	#endif
	#endif /* PPPOL2TP_SUPPORT */

	/**
	* MAXNAMELEN: max length of hostname or name for auth
	*/
	#ifndef MAXNAMELEN
	#define MAXNAMELEN 256
	#endif

	/**
	* MAXSECRETLEN: max length of password or secret
	*/
	#ifndef MAXSECRETLEN
	#define MAXSECRETLEN 256
	#endif

	/* ------------------------------------------------------------------------- */

	/*
	* Build triggers for embedded PolarSSL
	*/
	#if !LWIP_USE_EXTERNAL_POLARSSL && !LWIP_USE_EXTERNAL_MBEDTLS

	/* CHAP, EAP, L2TP AUTH and MD5 Random require MD5 support */
	#if CHAP_SUPPORT \|\| EAP_SUPPORT \|\| PPPOL2TP_AUTH_SUPPORT \|\| PPP_MD5_RANDM
	#define LWIP_INCLUDED_POLARSSL_MD5 1
	#endif /* CHAP_SUPPORT \|\| EAP_SUPPORT \|\| PPPOL2TP_AUTH_SUPPORT \|\| PPP_MD5_RANDM */

	#if MSCHAP_SUPPORT

	/* MSCHAP require MD4 support */
	#define LWIP_INCLUDED_POLARSSL_MD4 1
	/* MSCHAP require SHA1 support */
	#define LWIP_INCLUDED_POLARSSL_SHA1 1
	/* MSCHAP require DES support */
	#define LWIP_INCLUDED_POLARSSL_DES 1

	/* MS-CHAP support is required for MPPE */
	#if MPPE_SUPPORT
	/* MPPE require ARC4 support */
	#define LWIP_INCLUDED_POLARSSL_ARC4 1
	#endif /* MPPE_SUPPORT */

	#endif /* MSCHAP_SUPPORT */

	#endif /* !LWIP_USE_EXTERNAL_POLARSSL && !LWIP_USE_EXTERNAL_MBEDTLS */

	/* Default value if unset */
	#ifndef LWIP_INCLUDED_POLARSSL_MD4
	#define LWIP_INCLUDED_POLARSSL_MD4 0
	#endif /* LWIP_INCLUDED_POLARSSL_MD4 */
	#ifndef LWIP_INCLUDED_POLARSSL_MD5
	#define LWIP_INCLUDED_POLARSSL_MD5 0
	#endif /* LWIP_INCLUDED_POLARSSL_MD5 */
	#ifndef LWIP_INCLUDED_POLARSSL_SHA1
	#define LWIP_INCLUDED_POLARSSL_SHA1 0
	#endif /* LWIP_INCLUDED_POLARSSL_SHA1 */
	#ifndef LWIP_INCLUDED_POLARSSL_DES
	#define LWIP_INCLUDED_POLARSSL_DES 0
	#endif /* LWIP_INCLUDED_POLARSSL_DES */
	#ifndef LWIP_INCLUDED_POLARSSL_ARC4
	#define LWIP_INCLUDED_POLARSSL_ARC4 0
	#endif /* LWIP_INCLUDED_POLARSSL_ARC4 */

	#endif /* PPP_SUPPORT */

	/* Default value if unset */
	#ifndef PPP_NUM_TIMEOUTS
	#define PPP_NUM_TIMEOUTS 0
	#endif /* PPP_NUM_TIMEOUTS */

	#endif /* LWIP_PPP_OPTS_H */