BadVPN – Rev 1
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/*****************************************************************************
* ppp.h - Network Point to Point 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.
*****************************************************************************/
#include "netif/ppp/ppp_opts.h"
#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
#ifndef PPP_H
#define PPP_H
#include "lwip/def.h"
#include "lwip/stats.h"
#include "lwip/mem.h"
#include "lwip/netif.h"
#include "lwip/sys.h"
#include "lwip/timeouts.h"
#if PPP_IPV6_SUPPORT
#include "lwip/ip6_addr.h"
#endif /* PPP_IPV6_SUPPORT */
/* Disable non-working or rarely used PPP feature, so rarely that we don't want to bloat ppp_opts.h with them */
#ifndef PPP_OPTIONS
#define PPP_OPTIONS 0
#endif
#ifndef PPP_NOTIFY
#define PPP_NOTIFY 0
#endif
#ifndef PPP_REMOTENAME
#define PPP_REMOTENAME 0
#endif
#ifndef PPP_IDLETIMELIMIT
#define PPP_IDLETIMELIMIT 0
#endif
#ifndef PPP_LCP_ADAPTIVE
#define PPP_LCP_ADAPTIVE 0
#endif
#ifndef PPP_MAXCONNECT
#define PPP_MAXCONNECT 0
#endif
#ifndef PPP_ALLOWED_ADDRS
#define PPP_ALLOWED_ADDRS 0
#endif
#ifndef PPP_PROTOCOLNAME
#define PPP_PROTOCOLNAME 0
#endif
#ifndef PPP_STATS_SUPPORT
#define PPP_STATS_SUPPORT 0
#endif
#ifndef DEFLATE_SUPPORT
#define DEFLATE_SUPPORT 0
#endif
#ifndef BSDCOMPRESS_SUPPORT
#define BSDCOMPRESS_SUPPORT 0
#endif
#ifndef PREDICTOR_SUPPORT
#define PREDICTOR_SUPPORT 0
#endif
/*************************
*** PUBLIC DEFINITIONS ***
*************************/
/*
* The basic PPP frame.
*/
#define PPP_HDRLEN 4 /* octets for standard ppp header */
#define PPP_FCSLEN 2 /* octets for FCS */
/*
* Values for phase.
*/
#define PPP_PHASE_DEAD 0
#define PPP_PHASE_MASTER 1
#define PPP_PHASE_HOLDOFF 2
#define PPP_PHASE_INITIALIZE 3
#define PPP_PHASE_SERIALCONN 4
#define PPP_PHASE_DORMANT 5
#define PPP_PHASE_ESTABLISH 6
#define PPP_PHASE_AUTHENTICATE 7
#define PPP_PHASE_CALLBACK 8
#define PPP_PHASE_NETWORK 9
#define PPP_PHASE_RUNNING 10
#define PPP_PHASE_TERMINATE 11
#define PPP_PHASE_DISCONNECT 12
/* Error codes. */
#define PPPERR_NONE 0 /* No error. */
#define PPPERR_PARAM 1 /* Invalid parameter. */
#define PPPERR_OPEN 2 /* Unable to open PPP session. */
#define PPPERR_DEVICE 3 /* Invalid I/O device for PPP. */
#define PPPERR_ALLOC 4 /* Unable to allocate resources. */
#define PPPERR_USER 5 /* User interrupt. */
#define PPPERR_CONNECT 6 /* Connection lost. */
#define PPPERR_AUTHFAIL 7 /* Failed authentication challenge. */
#define PPPERR_PROTOCOL 8 /* Failed to meet protocol. */
#define PPPERR_PEERDEAD 9 /* Connection timeout */
#define PPPERR_IDLETIMEOUT 10 /* Idle Timeout */
#define PPPERR_CONNECTTIME 11 /* Max connect time reached */
#define PPPERR_LOOPBACK 12 /* Loopback detected */
/* Whether auth support is enabled at all */
#define PPP_AUTH_SUPPORT (PAP_SUPPORT || CHAP_SUPPORT || EAP_SUPPORT)
/************************
*** PUBLIC DATA TYPES ***
************************/
/*
* Other headers require ppp_pcb definition for prototypes, but ppp_pcb
* require some structure definition from other headers as well, we are
* fixing the dependency loop here by declaring the ppp_pcb type then
* by including headers containing necessary struct definition for ppp_pcb
*/
typedef struct ppp_pcb_s ppp_pcb;
/* Type definitions for BSD code. */
#ifndef __u_char_defined
typedef unsigned long u_long;
typedef unsigned int u_int;
typedef unsigned short u_short;
typedef unsigned char u_char;
#endif
#include "fsm.h"
#include "lcp.h"
#if CCP_SUPPORT
#include "ccp.h"
#endif /* CCP_SUPPORT */
#if MPPE_SUPPORT
#include "mppe.h"
#endif /* MPPE_SUPPORT */
#if PPP_IPV4_SUPPORT
#include "ipcp.h"
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
#include "ipv6cp.h"
#endif /* PPP_IPV6_SUPPORT */
#if PAP_SUPPORT
#include "upap.h"
#endif /* PAP_SUPPORT */
#if CHAP_SUPPORT
#include "chap-new.h"
#endif /* CHAP_SUPPORT */
#if EAP_SUPPORT
#include "eap.h"
#endif /* EAP_SUPPORT */
#if VJ_SUPPORT
#include "vj.h"
#endif /* VJ_SUPPORT */
/* Link status callback function prototype */
typedef void (*ppp_link_status_cb_fn)(ppp_pcb *pcb, int err_code, void *ctx);
/*
* PPP configuration.
*/
typedef struct ppp_settings_s {
#if PPP_SERVER && PPP_AUTH_SUPPORT
unsigned int auth_required :1; /* Peer is required to authenticate */
unsigned int null_login :1; /* Username of "" and a password of "" are acceptable */
#endif /* PPP_SERVER && PPP_AUTH_SUPPORT */
#if PPP_REMOTENAME
unsigned int explicit_remote :1; /* remote_name specified with remotename opt */
#endif /* PPP_REMOTENAME */
#if PAP_SUPPORT
unsigned int refuse_pap :1; /* Don't proceed auth. with PAP */
#endif /* PAP_SUPPORT */
#if CHAP_SUPPORT
unsigned int refuse_chap :1; /* Don't proceed auth. with CHAP */
#endif /* CHAP_SUPPORT */
#if MSCHAP_SUPPORT
unsigned int refuse_mschap :1; /* Don't proceed auth. with MS-CHAP */
unsigned int refuse_mschap_v2 :1; /* Don't proceed auth. with MS-CHAPv2 */
#endif /* MSCHAP_SUPPORT */
#if EAP_SUPPORT
unsigned int refuse_eap :1; /* Don't proceed auth. with EAP */
#endif /* EAP_SUPPORT */
#if LWIP_DNS
unsigned int usepeerdns :1; /* Ask peer for DNS adds */
#endif /* LWIP_DNS */
unsigned int persist :1; /* Persist mode, always try to open the connection */
#if PRINTPKT_SUPPORT
unsigned int hide_password :1; /* Hide password in dumped packets */
#endif /* PRINTPKT_SUPPORT */
unsigned int noremoteip :1; /* Let him have no IP address */
unsigned int lax_recv :1; /* accept control chars in asyncmap */
unsigned int noendpoint :1; /* don't send/accept endpoint discriminator */
#if PPP_LCP_ADAPTIVE
unsigned int lcp_echo_adaptive :1; /* request echo only if the link was idle */
#endif /* PPP_LCP_ADAPTIVE */
#if MPPE_SUPPORT
unsigned int require_mppe :1; /* Require MPPE (Microsoft Point to Point Encryption) */
unsigned int refuse_mppe_40 :1; /* Allow MPPE 40-bit mode? */
unsigned int refuse_mppe_128 :1; /* Allow MPPE 128-bit mode? */
unsigned int refuse_mppe_stateful :1; /* Allow MPPE stateful mode? */
#endif /* MPPE_SUPPORT */
u16_t listen_time; /* time to listen first (ms), waiting for peer to send LCP packet */
#if PPP_IDLETIMELIMIT
u16_t idle_time_limit; /* Disconnect if idle for this many seconds */
#endif /* PPP_IDLETIMELIMIT */
#if PPP_MAXCONNECT
u32_t maxconnect; /* Maximum connect time (seconds) */
#endif /* PPP_MAXCONNECT */
#if PPP_AUTH_SUPPORT
/* auth data */
const char *user; /* Username for PAP */
const char *passwd; /* Password for PAP, secret for CHAP */
#if PPP_REMOTENAME
char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */
#endif /* PPP_REMOTENAME */
#if PAP_SUPPORT
u8_t pap_timeout_time; /* Timeout (seconds) for auth-req retrans. */
u8_t pap_max_transmits; /* Number of auth-reqs sent */
#if PPP_SERVER
u8_t pap_req_timeout; /* Time to wait for auth-req from peer */
#endif /* PPP_SERVER */
#endif /* PAP_SUPPPORT */
#if CHAP_SUPPORT
u8_t chap_timeout_time; /* Timeout (seconds) for retransmitting req */
u8_t chap_max_transmits; /* max # times to send challenge */
#if PPP_SERVER
u8_t chap_rechallenge_time; /* Time to wait for auth-req from peer */
#endif /* PPP_SERVER */
#endif /* CHAP_SUPPPORT */
#if EAP_SUPPORT
u8_t eap_req_time; /* Time to wait (for retransmit/fail) */
u8_t eap_allow_req; /* Max Requests allowed */
#if PPP_SERVER
u8_t eap_timeout_time; /* Time to wait (for retransmit/fail) */
u8_t eap_max_transmits; /* Max Requests allowed */
#endif /* PPP_SERVER */
#endif /* EAP_SUPPORT */
#endif /* PPP_AUTH_SUPPORT */
u8_t fsm_timeout_time; /* Timeout time in seconds */
u8_t fsm_max_conf_req_transmits; /* Maximum Configure-Request transmissions */
u8_t fsm_max_term_transmits; /* Maximum Terminate-Request transmissions */
u8_t fsm_max_nak_loops; /* Maximum number of nak loops tolerated */
u8_t lcp_loopbackfail; /* Number of times we receive our magic number from the peer
before deciding the link is looped-back. */
u8_t lcp_echo_interval; /* Interval between LCP echo-requests */
u8_t lcp_echo_fails; /* Tolerance to unanswered echo-requests */
} ppp_settings;
#if PPP_SERVER
struct ppp_addrs {
#if PPP_IPV4_SUPPORT
ip4_addr_t our_ipaddr, his_ipaddr, netmask;
#if LWIP_DNS
ip4_addr_t dns1, dns2;
#endif /* LWIP_DNS */
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
ip6_addr_t our6_ipaddr, his6_ipaddr;
#endif /* PPP_IPV6_SUPPORT */
};
#endif /* PPP_SERVER */
/*
* PPP interface control block.
*/
struct ppp_pcb_s {
ppp_settings settings;
const struct link_callbacks *link_cb;
void *link_ctx_cb;
void (*link_status_cb)(ppp_pcb *pcb, int err_code, void *ctx); /* Status change callback */
#if PPP_NOTIFY_PHASE
void (*notify_phase_cb)(ppp_pcb *pcb, u8_t phase, void *ctx); /* Notify phase callback */
#endif /* PPP_NOTIFY_PHASE */
void *ctx_cb; /* Callbacks optional pointer */
struct netif *netif; /* PPP interface */
u8_t phase; /* where the link is at */
u8_t err_code; /* Code indicating why interface is down. */
/* flags */
#if PPP_IPV4_SUPPORT
unsigned int ask_for_local :1; /* request our address from peer */
unsigned int ipcp_is_open :1; /* haven't called np_finished() */
unsigned int ipcp_is_up :1; /* have called ipcp_up() */
unsigned int if4_up :1; /* True when the IPv4 interface is up. */
#if 0 /* UNUSED - PROXY ARP */
unsigned int proxy_arp_set :1; /* Have created proxy arp entry */
#endif /* UNUSED - PROXY ARP */
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
unsigned int ipv6cp_is_up :1; /* have called ip6cp_up() */
unsigned int if6_up :1; /* True when the IPv6 interface is up. */
#endif /* PPP_IPV6_SUPPORT */
unsigned int lcp_echo_timer_running :1; /* set if a timer is running */
#if VJ_SUPPORT
unsigned int vj_enabled :1; /* Flag indicating VJ compression enabled. */
#endif /* VJ_SUPPORT */
#if CCP_SUPPORT
unsigned int ccp_all_rejected :1; /* we rejected all peer's options */
#endif /* CCP_SUPPORT */
#if MPPE_SUPPORT
unsigned int mppe_keys_set :1; /* Have the MPPE keys been set? */
#endif /* MPPE_SUPPORT */
#if PPP_AUTH_SUPPORT
/* auth data */
#if PPP_SERVER && defined(HAVE_MULTILINK)
char peer_authname[MAXNAMELEN + 1]; /* The name by which the peer authenticated itself to us. */
#endif /* PPP_SERVER && defined(HAVE_MULTILINK) */
u16_t auth_pending; /* Records which authentication operations haven't completed yet. */
u16_t auth_done; /* Records which authentication operations have been completed. */
#if PAP_SUPPORT
upap_state upap; /* PAP data */
#endif /* PAP_SUPPORT */
#if CHAP_SUPPORT
chap_client_state chap_client; /* CHAP client data */
#if PPP_SERVER
chap_server_state chap_server; /* CHAP server data */
#endif /* PPP_SERVER */
#endif /* CHAP_SUPPORT */
#if EAP_SUPPORT
eap_state eap; /* EAP data */
#endif /* EAP_SUPPORT */
#endif /* PPP_AUTH_SUPPORT */
fsm lcp_fsm; /* LCP fsm structure */
lcp_options lcp_wantoptions; /* Options that we want to request */
lcp_options lcp_gotoptions; /* Options that peer ack'd */
lcp_options lcp_allowoptions; /* Options we allow peer to request */
lcp_options lcp_hisoptions; /* Options that we ack'd */
u16_t peer_mru; /* currently negotiated peer MRU */
u8_t lcp_echos_pending; /* Number of outstanding echo msgs */
u8_t lcp_echo_number; /* ID number of next echo frame */
u8_t num_np_open; /* Number of network protocols which we have opened. */
u8_t num_np_up; /* Number of network protocols which have come up. */
#if VJ_SUPPORT
struct vjcompress vj_comp; /* Van Jacobson compression header. */
#endif /* VJ_SUPPORT */
#if CCP_SUPPORT
fsm ccp_fsm; /* CCP fsm structure */
ccp_options ccp_wantoptions; /* what to request the peer to use */
ccp_options ccp_gotoptions; /* what the peer agreed to do */
ccp_options ccp_allowoptions; /* what we'll agree to do */
ccp_options ccp_hisoptions; /* what we agreed to do */
u8_t ccp_localstate; /* Local state (mainly for handling reset-reqs and reset-acks). */
u8_t ccp_receive_method; /* Method chosen on receive path */
u8_t ccp_transmit_method; /* Method chosen on transmit path */
#if MPPE_SUPPORT
ppp_mppe_state mppe_comp; /* MPPE "compressor" structure */
ppp_mppe_state mppe_decomp; /* MPPE "decompressor" structure */
#endif /* MPPE_SUPPORT */
#endif /* CCP_SUPPORT */
#if PPP_IPV4_SUPPORT
fsm ipcp_fsm; /* IPCP fsm structure */
ipcp_options ipcp_wantoptions; /* Options that we want to request */
ipcp_options ipcp_gotoptions; /* Options that peer ack'd */
ipcp_options ipcp_allowoptions; /* Options we allow peer to request */
ipcp_options ipcp_hisoptions; /* Options that we ack'd */
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
fsm ipv6cp_fsm; /* IPV6CP fsm structure */
ipv6cp_options ipv6cp_wantoptions; /* Options that we want to request */
ipv6cp_options ipv6cp_gotoptions; /* Options that peer ack'd */
ipv6cp_options ipv6cp_allowoptions; /* Options we allow peer to request */
ipv6cp_options ipv6cp_hisoptions; /* Options that we ack'd */
#endif /* PPP_IPV6_SUPPORT */
};
/************************
*** PUBLIC FUNCTIONS ***
************************/
/*
* WARNING: For multi-threads environment, all ppp_set_* functions most
* only be called while the PPP is in the dead phase (i.e. disconnected).
*/
#if PPP_AUTH_SUPPORT
/*
* Set PPP authentication.
*
* 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.
*
* Default is none auth type, unset (NULL) user and passwd.
*/
#define PPPAUTHTYPE_NONE 0x00
#define PPPAUTHTYPE_PAP 0x01
#define PPPAUTHTYPE_CHAP 0x02
#define PPPAUTHTYPE_MSCHAP 0x04
#define PPPAUTHTYPE_MSCHAP_V2 0x08
#define PPPAUTHTYPE_EAP 0x10
#define PPPAUTHTYPE_ANY 0xff
void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd);
/*
* If set, peer is required to authenticate. This is mostly necessary for PPP server support.
*
* Default is false.
*/
#define ppp_set_auth_required(ppp, boolval) (ppp->settings.auth_required = boolval)
#endif /* PPP_AUTH_SUPPORT */
#if PPP_IPV4_SUPPORT
/*
* Set PPP interface "our" and "his" IPv4 addresses. This is mostly necessary for PPP server
* support but it can also be used on a PPP link where each side choose its own IP address.
*
* Default is unset (0.0.0.0).
*/
#define ppp_set_ipcp_ouraddr(ppp, addr) do { ppp->ipcp_wantoptions.ouraddr = ip4_addr_get_u32(addr); \
ppp->ask_for_local = ppp->ipcp_wantoptions.ouraddr != 0; } while(0)
#define ppp_set_ipcp_hisaddr(ppp, addr) (ppp->ipcp_wantoptions.hisaddr = ip4_addr_get_u32(addr))
#if LWIP_DNS
/*
* Set DNS server addresses that are sent if the peer asks for them. This is mostly necessary
* for PPP server support.
*
* Default is unset (0.0.0.0).
*/
#define ppp_set_ipcp_dnsaddr(ppp, index, addr) (ppp->ipcp_allowoptions.dnsaddr[index] = ip4_addr_get_u32(addr))
/*
* If set, we ask the peer for up to 2 DNS server addresses. Received DNS server addresses are
* registered using the dns_setserver() function.
*
* Default is false.
*/
#define ppp_set_usepeerdns(ppp, boolval) (ppp->settings.usepeerdns = boolval)
#endif /* LWIP_DNS */
#endif /* PPP_IPV4_SUPPORT */
#if MPPE_SUPPORT
/* Disable MPPE (Microsoft Point to Point Encryption). This parameter is exclusive. */
#define PPP_MPPE_DISABLE 0x00
/* Require the use of MPPE (Microsoft Point to Point Encryption). */
#define PPP_MPPE_ENABLE 0x01
/* Allow MPPE to use stateful mode. Stateless mode is still attempted first. */
#define PPP_MPPE_ALLOW_STATEFUL 0x02
/* Refuse the use of MPPE with 40-bit encryption. Conflict with PPP_MPPE_REFUSE_128. */
#define PPP_MPPE_REFUSE_40 0x04
/* Refuse the use of MPPE with 128-bit encryption. Conflict with PPP_MPPE_REFUSE_40. */
#define PPP_MPPE_REFUSE_128 0x08
/*
* Set MPPE configuration
*
* Default is disabled.
*/
void ppp_set_mppe(ppp_pcb *pcb, u8_t flags);
#endif /* MPPE_SUPPORT */
/*
* Wait for up to intval milliseconds for a valid PPP packet from the peer.
* At the end of this time, or when a valid PPP packet is received from the
* peer, we commence negotiation by sending our first LCP packet.
*
* Default is 0.
*/
#define ppp_set_listen_time(ppp, intval) (ppp->settings.listen_time = intval)
/*
* If set, we will attempt to initiate a connection but if no reply is received from
* the peer, we will then just wait passively for a valid LCP packet from the peer.
*
* Default is false.
*/
#define ppp_set_passive(ppp, boolval) (ppp->lcp_wantoptions.passive = boolval)
/*
* If set, we will not transmit LCP packets to initiate a connection until a valid
* LCP packet is received from the peer. This is what we usually call the server mode.
*
* Default is false.
*/
#define ppp_set_silent(ppp, boolval) (ppp->lcp_wantoptions.silent = boolval)
/*
* If set, enable protocol field compression negotiation in both the receive and
* the transmit direction.
*
* Default is true.
*/
#define ppp_set_neg_pcomp(ppp, boolval) (ppp->lcp_wantoptions.neg_pcompression = \
ppp->lcp_allowoptions.neg_pcompression = boolval)
/*
* If set, enable Address/Control compression in both the receive and the transmit
* direction.
*
* Default is true.
*/
#define ppp_set_neg_accomp(ppp, boolval) (ppp->lcp_wantoptions.neg_accompression = \
ppp->lcp_allowoptions.neg_accompression = boolval)
/*
* If set, enable asyncmap negotiation. Otherwise forcing all control characters to
* be escaped for both the transmit and the receive direction.
*
* Default is true.
*/
#define ppp_set_neg_asyncmap(ppp, boolval) (ppp->lcp_wantoptions.neg_asyncmap = \
ppp->lcp_allowoptions.neg_asyncmap = boolval)
/*
* This option sets the Async-Control-Character-Map (ACCM) for this end of the link.
* The ACCM is a set of 32 bits, one for each of the ASCII control characters with
* values from 0 to 31, where a 1 bit indicates that the corresponding control
* character should not be used in PPP packets sent to this system. The map is
* an unsigned 32 bits integer where the least significant bit (00000001) represents
* character 0 and the most significant bit (80000000) represents character 31.
* We will then ask the peer to send these characters as a 2-byte escape sequence.
*
* Default is 0.
*/
#define ppp_set_asyncmap(ppp, intval) (ppp->lcp_wantoptions.asyncmap = intval)
/*
* Set a PPP interface as the default network interface
* (used to output all packets for which no specific route is found).
*/
#define ppp_set_default(ppp) netif_set_default(ppp->netif)
#if PPP_NOTIFY_PHASE
/*
* Set a PPP notify phase callback.
*
* This can be used for example to set a LED pattern depending on the
* current phase of the PPP session.
*/
typedef void (*ppp_notify_phase_cb_fn)(ppp_pcb *pcb, u8_t phase, void *ctx);
void ppp_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb);
#endif /* PPP_NOTIFY_PHASE */
/*
* Initiate a PPP connection.
*
* This can only be called if PPP is in the dead phase.
*
* Holdoff is the time to wait (in seconds) before initiating
* the connection.
*
* If this port connects to a modem, the modem connection must be
* established before calling this.
*/
err_t ppp_connect(ppp_pcb *pcb, u16_t holdoff);
#if PPP_SERVER
/*
* Listen for an incoming PPP connection.
*
* This can only be called if PPP is in the dead phase.
*
* If this port connects to a modem, the modem connection must be
* established before calling this.
*/
err_t ppp_listen(ppp_pcb *pcb);
#endif /* PPP_SERVER */
/*
* Initiate the end of a PPP connection.
* Any outstanding packets in the queues are dropped.
*
* Setting nocarrier to 1 close the PPP connection without initiating the
* shutdown procedure. Always using nocarrier = 0 is still recommended,
* this is going to take a little longer time if your link is down, but
* is a safer choice for the PPP state machine.
*
* Return 0 on success, an error code on failure.
*/
err_t ppp_close(ppp_pcb *pcb, u8_t nocarrier);
/*
* Release the control block.
*
* This can only be called if PPP is in the dead phase.
*
* You must use ppp_close() before if you wish to terminate
* an established PPP session.
*
* Return 0 on success, an error code on failure.
*/
err_t ppp_free(ppp_pcb *pcb);
/*
* PPP IOCTL commands.
*
* Get the up status - 0 for down, non-zero for up. The argument must
* point to an int.
*/
#define PPPCTLG_UPSTATUS 0
/*
* Get the PPP error code. The argument must point to an int.
* Returns a PPPERR_* value.
*/
#define PPPCTLG_ERRCODE 1
/*
* Get the fd associated with a PPP over serial
*/
#define PPPCTLG_FD 2
/*
* Get and set parameters for the given connection.
* Return 0 on success, an error code on failure.
*/
err_t ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg);
/* Get the PPP netif interface */
#define ppp_netif(ppp) (ppp->netif)
/* Set an lwIP-style status-callback for the selected PPP device */
#define ppp_set_netif_statuscallback(ppp, status_cb) \
netif_set_status_callback(ppp->netif, status_cb);
/* Set an lwIP-style link-callback for the selected PPP device */
#define ppp_set_netif_linkcallback(ppp, link_cb) \
netif_set_link_callback(ppp->netif, link_cb);
#endif /* PPP_H */
#endif /* PPP_SUPPORT */