lwip/src/include/netif/ppp/ppp_impl.h
Sylvain Rochet fd53cad208 PPP, sifnpmode() is only useful if on demand is supported, build out if not
We don't support PPP on demand, don't build sifnpmode() which is only
useful for on demand if on demand is not supported.
2015-04-30 00:06:24 +02:00

641 lines
22 KiB
C

/*****************************************************************************
* 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 "lwip/opt.h"
#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
#ifndef PPP_IMP_H_
#define PPP_IMP_H_
#include <stdio.h> /* formats */
#include <stdarg.h>
#include <string.h>
#include <stdlib.h> /* strtol() */
#include "lwip/netif.h"
#include "lwip/def.h"
#include "lwip/timers.h"
#include "ppp.h"
#include "pppdebug.h"
/*
* Memory used for control packets.
*
* PPP_CTRL_PBUF_MAX_SIZE is the amount of memory we allocate when we
* cannot figure out how much we are going to use before filling the buffer.
*/
#if PPP_USE_PBUF_RAM
#define PPP_CTRL_PBUF_TYPE PBUF_RAM
#define PPP_CTRL_PBUF_MAX_SIZE 512
#else /* PPP_USE_PBUF_RAM */
#define PPP_CTRL_PBUF_TYPE PBUF_POOL
#define PPP_CTRL_PBUF_MAX_SIZE PBUF_POOL_BUFSIZE
#endif /* PPP_USE_PBUF_RAM */
/*
* Limits.
*/
#define MAXWORDLEN 1024 /* max length of word in file (incl null) */
#define MAXARGS 1 /* max # args to a command */
#define MAXNAMELEN 256 /* max length of hostname or name for auth */
#define MAXSECRETLEN 256 /* max length of password or secret */
/*
* The basic PPP frame.
*/
#define PPP_ADDRESS(p) (((u_char *)(p))[0])
#define PPP_CONTROL(p) (((u_char *)(p))[1])
#define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
/*
* Significant octet values.
*/
#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
#define PPP_UI 0x03 /* Unnumbered Information */
#define PPP_FLAG 0x7e /* Flag Sequence */
#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
/*
* Protocol field values.
*/
#define PPP_IP 0x21 /* Internet Protocol */
#if 0 /* UNUSED */
#define PPP_AT 0x29 /* AppleTalk Protocol */
#define PPP_IPX 0x2b /* IPX protocol */
#endif /* UNUSED */
#if VJ_SUPPORT
#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
#endif /* VJ_SUPPORT */
#if PPP_IPV6_SUPPORT
#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */
#endif /* PPP_IPV6_SUPPORT */
#if CCP_SUPPORT
#define PPP_COMP 0xfd /* compressed packet */
#endif /* CCP_SUPPORT */
#define PPP_IPCP 0x8021 /* IP Control Protocol */
#if 0 /* UNUSED */
#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
#define PPP_IPXCP 0x802b /* IPX Control Protocol */
#endif /* UNUSED */
#if PPP_IPV6_SUPPORT
#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
#endif /* PPP_IPV6_SUPPORT */
#if CCP_SUPPORT
#define PPP_CCP 0x80fd /* Compression Control Protocol */
#endif /* CCP_SUPPORT */
#if ECP_SUPPORT
#define PPP_ECP 0x8053 /* Encryption Control Protocol */
#endif /* ECP_SUPPORT */
#define PPP_LCP 0xc021 /* Link Control Protocol */
#if PAP_SUPPORT
#define PPP_PAP 0xc023 /* Password Authentication Protocol */
#endif /* PAP_SUPPORT */
#if LQR_SUPPORT
#define PPP_LQR 0xc025 /* Link Quality Report protocol */
#endif /* LQR_SUPPORT */
#if CHAP_SUPPORT
#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
#endif /* CHAP_SUPPORT */
#if CBCP_SUPPORT
#define PPP_CBCP 0xc029 /* Callback Control Protocol */
#endif /* CBCP_SUPPORT */
#if EAP_SUPPORT
#define PPP_EAP 0xc227 /* Extensible Authentication Protocol */
#endif /* EAP_SUPPORT */
/*
* The following struct gives the addresses of procedures to call
* for a particular lower link level protocol.
*/
struct link_callbacks {
/* Start a connection (e.g. Initiate discovery phase) */
err_t (*connect) (ppp_pcb *pcb, void *ctx);
#if PPP_SERVER
/* Listen for an incoming connection (Passive mode) */
err_t (*listen) (ppp_pcb *pcb, void *ctx, struct ppp_addrs *addrs);
#endif /* PPP_SERVER */
/* End a connection (i.e. initiate disconnect phase) */
void (*disconnect) (ppp_pcb *pcb, void *ctx);
/* Free lower protocol control block */
err_t (*free) (ppp_pcb *pcb, void *ctx);
/* Write a pbuf to a ppp link, only used from PPP functions to send PPP packets. */
err_t (*write)(ppp_pcb *pcb, void *ctx, struct pbuf *p);
/* Send a packet from lwIP core (IPv4 or IPv6) */
err_t (*netif_output)(ppp_pcb *pcb, void *ctx, struct pbuf *p, u_short protocol);
/* configure the transmit-side characteristics of the PPP interface */
void (*send_config)(ppp_pcb *pcb, void *ctx, u32_t accm, int pcomp, int accomp);
/* confire the receive-side characteristics of the PPP interface */
void (*recv_config)(ppp_pcb *pcb, void *ctx, u32_t accm, int pcomp, int accomp);
/* Get and set parameters for the given connection. */
err_t (*ioctl)(ppp_pcb *pcb, void *ctx, int cmd, void *arg);
};
/*
* What to do with network protocol (NP) packets.
*/
enum NPmode {
NPMODE_PASS, /* pass the packet through */
NPMODE_DROP, /* silently drop the packet */
NPMODE_ERROR, /* return an error */
NPMODE_QUEUE /* save it up for later. */
};
/*
* Statistics.
*/
#if PPP_STATS_SUPPORT
struct pppstat {
unsigned int ppp_ibytes; /* bytes received */
unsigned int ppp_ipackets; /* packets received */
unsigned int ppp_ierrors; /* receive errors */
unsigned int ppp_obytes; /* bytes sent */
unsigned int ppp_opackets; /* packets sent */
unsigned int ppp_oerrors; /* transmit errors */
};
#if VJ_SUPPORT
struct vjstat {
unsigned int vjs_packets; /* outbound packets */
unsigned int vjs_compressed; /* outbound compressed packets */
unsigned int vjs_searches; /* searches for connection state */
unsigned int vjs_misses; /* times couldn't find conn. state */
unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
unsigned int vjs_compressedin; /* inbound compressed packets */
unsigned int vjs_errorin; /* inbound unknown type packets */
unsigned int vjs_tossed; /* inbound packets tossed because of error */
};
#endif /* VJ_SUPPORT */
struct ppp_stats {
struct pppstat p; /* basic PPP statistics */
#if VJ_SUPPORT
struct vjstat vj; /* VJ header compression statistics */
#endif /* VJ_SUPPORT */
};
#if CCP_SUPPORT
struct compstat {
unsigned int unc_bytes; /* total uncompressed bytes */
unsigned int unc_packets; /* total uncompressed packets */
unsigned int comp_bytes; /* compressed bytes */
unsigned int comp_packets; /* compressed packets */
unsigned int inc_bytes; /* incompressible bytes */
unsigned int inc_packets; /* incompressible packets */
unsigned int ratio; /* recent compression ratio << 8 */
};
struct ppp_comp_stats {
struct compstat c; /* packet compression statistics */
struct compstat d; /* packet decompression statistics */
};
#endif /* CCP_SUPPORT */
#endif /* PPP_STATS_SUPPORT */
#if PPP_IDLETIMELIMIT
/*
* The following structure records the time in seconds since
* the last NP packet was sent or received.
*/
struct ppp_idle {
time_t xmit_idle; /* time since last NP packet sent */
time_t recv_idle; /* time since last NP packet received */
};
#endif /* PPP_IDLETIMELIMIT */
/* values for epdisc.class */
#define EPD_NULL 0 /* null discriminator, no data */
#define EPD_LOCAL 1
#define EPD_IP 2
#define EPD_MAC 3
#define EPD_MAGIC 4
#define EPD_PHONENUM 5
/*
* Global variables.
*/
#ifdef HAVE_MULTILINK
extern u8_t multilink; /* enable multilink operation */
extern u8_t doing_multilink;
extern u8_t multilink_master;
extern u8_t bundle_eof;
extern u8_t bundle_terminating;
#endif
#ifdef MAXOCTETS
extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */
extern int maxoctets_dir; /* Direction :
0 - in+out (default)
1 - in
2 - out
3 - max(in,out) */
extern int maxoctets_timeout; /* Timeout for check of octets limit */
#define PPP_OCTETS_DIRECTION_SUM 0
#define PPP_OCTETS_DIRECTION_IN 1
#define PPP_OCTETS_DIRECTION_OUT 2
#define PPP_OCTETS_DIRECTION_MAXOVERAL 3
/* same as previos, but little different on RADIUS side */
#define PPP_OCTETS_DIRECTION_MAXSESSION 4
#endif
/* Data input may be used by CCP and ECP, remove this entry
* from struct protent to save some flash
*/
#define PPP_DATAINPUT 0
/*
* The following struct gives the addresses of procedures to call
* for a particular protocol.
*/
struct protent {
u_short protocol; /* PPP protocol number */
/* Initialization procedure */
void (*init) (ppp_pcb *pcb);
/* Process a received packet */
void (*input) (ppp_pcb *pcb, u_char *pkt, int len);
/* Process a received protocol-reject */
void (*protrej) (ppp_pcb *pcb);
/* Lower layer has come up */
void (*lowerup) (ppp_pcb *pcb);
/* Lower layer has gone down */
void (*lowerdown) (ppp_pcb *pcb);
/* Open the protocol */
void (*open) (ppp_pcb *pcb);
/* Close the protocol */
void (*close) (ppp_pcb *pcb, const char *reason);
#if PRINTPKT_SUPPORT
/* Print a packet in readable form */
int (*printpkt) (u_char *pkt, int len,
void (*printer) (void *, const char *, ...),
void *arg);
#endif /* PRINTPKT_SUPPORT */
#if PPP_DATAINPUT
/* Process a received data packet */
void (*datainput) (ppp_pcb *pcb, u_char *pkt, int len);
#endif /* PPP_DATAINPUT */
#if PRINTPKT_SUPPORT
const char *name; /* Text name of protocol */
const char *data_name; /* Text name of corresponding data protocol */
#endif /* PRINTPKT_SUPPORT */
#if PPP_OPTIONS
option_t *options; /* List of command-line options */
/* Check requested options, assign defaults */
void (*check_options) (void);
#endif /* PPP_OPTIONS */
#if DEMAND_SUPPORT
/* Configure interface for demand-dial */
int (*demand_conf) (int unit);
/* Say whether to bring up link for this pkt */
int (*active_pkt) (u_char *pkt, int len);
#endif /* DEMAND_SUPPORT */
};
/* Table of pointers to supported protocols */
extern const struct protent* const protocols[];
/* Values for auth_pending, auth_done */
#if PAP_SUPPORT
#define PAP_WITHPEER 0x1
#define PAP_PEER 0x2
#endif /* PAP_SUPPORT */
#if CHAP_SUPPORT
#define CHAP_WITHPEER 0x4
#define CHAP_PEER 0x8
#endif /* CHAP_SUPPORT */
#if EAP_SUPPORT
#define EAP_WITHPEER 0x10
#define EAP_PEER 0x20
#endif /* EAP_SUPPORT */
/* Values for auth_done only */
#if CHAP_SUPPORT
#define CHAP_MD5_WITHPEER 0x40
#define CHAP_MD5_PEER 0x80
#if MSCHAP_SUPPORT
#define CHAP_MS_SHIFT 8 /* LSB position for MS auths */
#define CHAP_MS_WITHPEER 0x100
#define CHAP_MS_PEER 0x200
#define CHAP_MS2_WITHPEER 0x400
#define CHAP_MS2_PEER 0x800
#endif /* MSCHAP_SUPPORT */
#endif /* CHAP_SUPPORT */
/* Supported CHAP protocols */
#if CHAP_SUPPORT
#if MSCHAP_SUPPORT
#define CHAP_MDTYPE_SUPPORTED (MDTYPE_MICROSOFT_V2 | MDTYPE_MICROSOFT | MDTYPE_MD5)
#else /* MSCHAP_SUPPORT */
#define CHAP_MDTYPE_SUPPORTED (MDTYPE_MD5)
#endif /* MSCHAP_SUPPORT */
#else /* CHAP_SUPPORT */
#define CHAP_MDTYPE_SUPPORTED (MDTYPE_NONE)
#endif /* CHAP_SUPPORT */
#if PPP_STATS_SUPPORT
/*
* PPP statistics structure
*/
struct pppd_stats {
unsigned int bytes_in;
unsigned int bytes_out;
unsigned int pkts_in;
unsigned int pkts_out;
};
#endif /* PPP_STATS_SUPPORT */
/*
* PPP private functions
*/
/*
* Functions called from lwIP core.
*/
/* initialize the PPP subsystem */
int ppp_init(void);
/*
* Functions called from PPP link protocols.
*/
/* Create a new PPP control block */
ppp_pcb *ppp_new(struct netif *pppif, ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
/* Set link callback functions */
void ppp_link_set_callbacks(ppp_pcb *pcb, const struct link_callbacks *callbacks, void *ctx);
/* Set a PPP PCB to its initial state */
void ppp_clear(ppp_pcb *pcb);
/* Initiate LCP open request */
void ppp_start(ppp_pcb *pcb);
/* Called when link failed to setup */
void ppp_link_failed(ppp_pcb *pcb);
/* Called when link is normally down (i.e. it was asked to end) */
void ppp_link_end(ppp_pcb *pcb);
/* function called to process input packet */
void ppp_input(ppp_pcb *pcb, struct pbuf *pb);
/* helper function, merge a pbuf chain into one pbuf */
struct pbuf *ppp_singlebuf(struct pbuf *p);
/*
* Functions called by PPP protocols.
*/
/* function called by all PPP subsystems to send packets */
err_t ppp_write(ppp_pcb *pcb, struct pbuf *p);
/* functions called by auth.c link_terminated() */
void ppp_link_terminated(ppp_pcb *pcb);
void new_phase(ppp_pcb *pcb, int p);
int ppp_send_config(ppp_pcb *pcb, int mtu, u32_t accm, int pcomp, int accomp);
int ppp_recv_config(ppp_pcb *pcb, int mru, u32_t accm, int pcomp, int accomp);
#if PPP_IPV4_SUPPORT
int sifaddr(ppp_pcb *pcb, u32_t our_adr, u32_t his_adr, u32_t netmask);
int cifaddr(ppp_pcb *pcb, u32_t our_adr, u32_t his_adr);
#if 0 /* UNUSED - PROXY ARP */
int sifproxyarp(ppp_pcb *pcb, u32_t his_adr);
int cifproxyarp(ppp_pcb *pcb, u32_t his_adr);
#endif /* UNUSED - PROXY ARP */
#if LWIP_DNS
int sdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2);
int cdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2);
#endif /* LWIP_DNS */
#if VJ_SUPPORT
int sifvjcomp(ppp_pcb *pcb, int vjcomp, int cidcomp, int maxcid);
#endif /* VJ_SUPPORT */
int sifup(ppp_pcb *pcb);
int sifdown (ppp_pcb *pcb);
u32_t get_mask(u32_t addr);
#endif /* PPP_IPV4_SUPPORT */
#if PPP_IPV6_SUPPORT
int sif6addr(ppp_pcb *pcb, eui64_t our_eui64, eui64_t his_eui64);
int cif6addr(ppp_pcb *pcb, eui64_t our_eui64, eui64_t his_eui64);
int sif6up(ppp_pcb *pcb);
int sif6down (ppp_pcb *pcb);
#endif /* PPP_IPV6_SUPPORT */
#if DEMAND_SUPPORT
int sifnpmode(ppp_pcb *pcb, int proto, enum NPmode mode);
#endif /* DEMAND_SUPPORt */
void netif_set_mtu(ppp_pcb *pcb, int mtu);
int netif_get_mtu(ppp_pcb *pcb);
#if CCP_SUPPORT
#if 0 /* unused */
int ccp_test(ppp_pcb *pcb, u_char *opt_ptr, int opt_len, int for_transmit);
#endif /* unused */
void ccp_set(ppp_pcb *pcb, u8_t isopen, u8_t isup, u8_t receive_method, u8_t transmit_method);
void ccp_reset_comp(ppp_pcb *pcb);
void ccp_reset_decomp(ppp_pcb *pcb);
#if 0 /* unused */
int ccp_fatal_error(ppp_pcb *pcb);
#endif /* unused */
#endif /* CCP_SUPPORT */
#if PPP_IDLETIMELIMIT
int get_idle_time(ppp_pcb *pcb, struct ppp_idle *ip);
#endif /* PPP_IDLETIMELIMIT */
#if DEMAND_SUPPORT
int get_loop_output(void);
#endif /* DEMAND_SUPPORT */
/* Optional protocol names list, to make our messages a little more informative. */
#if PPP_PROTOCOLNAME
const char * protocol_name(int proto);
#endif /* PPP_PROTOCOLNAME */
/* Optional stats support, to get some statistics on the PPP interface */
#if PPP_STATS_SUPPORT
void print_link_stats(void); /* Print stats, if available */
void reset_link_stats(int u); /* Reset (init) stats when link goes up */
void update_link_stats(int u); /* Get stats at link termination */
#endif /* PPP_STATS_SUPPORT */
/*
* Inline versions of get/put char/short/long.
* Pointer is advanced; we assume that both arguments
* are lvalues and will already be in registers.
* cp MUST be u_char *.
*/
#define GETCHAR(c, cp) { \
(c) = *(cp)++; \
}
#define PUTCHAR(c, cp) { \
*(cp)++ = (u_char) (c); \
}
#define GETSHORT(s, cp) { \
(s) = *(cp)++ << 8; \
(s) |= *(cp)++; \
}
#define PUTSHORT(s, cp) { \
*(cp)++ = (u_char) ((s) >> 8); \
*(cp)++ = (u_char) (s); \
}
#define GETLONG(l, cp) { \
(l) = *(cp)++ << 8; \
(l) |= *(cp)++; (l) <<= 8; \
(l) |= *(cp)++; (l) <<= 8; \
(l) |= *(cp)++; \
}
#define PUTLONG(l, cp) { \
*(cp)++ = (u_char) ((l) >> 24); \
*(cp)++ = (u_char) ((l) >> 16); \
*(cp)++ = (u_char) ((l) >> 8); \
*(cp)++ = (u_char) (l); \
}
#define INCPTR(n, cp) ((cp) += (n))
#define DECPTR(n, cp) ((cp) -= (n))
/*
* System dependent definitions for user-level 4.3BSD UNIX implementation.
*/
#define TIMEOUT(f, a, t) do { sys_untimeout((f), (a)); sys_timeout((t)*1000, (f), (a)); } while(0)
#define TIMEOUTMS(f, a, t) do { sys_untimeout((f), (a)); sys_timeout((t), (f), (a)); } while(0)
#define UNTIMEOUT(f, a) sys_untimeout((f), (a))
#define BZERO(s, n) memset(s, 0, n)
#define BCMP(s1, s2, l) memcmp(s1, s2, l)
#define PRINTMSG(m, l) { ppp_info("Remote message: %0.*v", l, m); }
/*
* MAKEHEADER - Add Header fields to a packet.
*/
#define MAKEHEADER(p, t) { \
PUTCHAR(PPP_ALLSTATIONS, p); \
PUTCHAR(PPP_UI, p); \
PUTSHORT(t, p); }
/* Procedures exported from auth.c */
void link_required(ppp_pcb *pcb); /* we are starting to use the link */
void link_terminated(ppp_pcb *pcb); /* we are finished with the link */
void link_down(ppp_pcb *pcb); /* the LCP layer has left the Opened state */
void upper_layers_down(ppp_pcb *pcb); /* take all NCPs down */
void link_established(ppp_pcb *pcb); /* the link is up; authenticate now */
void start_networks(ppp_pcb *pcb); /* start all the network control protos */
void continue_networks(ppp_pcb *pcb); /* start network [ip, etc] control protos */
#if PPP_AUTH_SUPPORT
#if PPP_SERVER
int auth_check_passwd(ppp_pcb *pcb, char *auser, int userlen, char *apasswd, int passwdlen, const char **msg, int *msglen);
/* check the user name and passwd against configuration */
void auth_peer_fail(ppp_pcb *pcb, int protocol);
/* peer failed to authenticate itself */
void auth_peer_success(ppp_pcb *pcb, int protocol, int prot_flavor, const char *name, int namelen);
/* peer successfully authenticated itself */
#endif /* PPP_SERVER */
void auth_withpeer_fail(ppp_pcb *pcb, int protocol);
/* we failed to authenticate ourselves */
void auth_withpeer_success(ppp_pcb *pcb, int protocol, int prot_flavor);
/* we successfully authenticated ourselves */
#endif /* PPP_AUTH_SUPPORT */
void np_up(ppp_pcb *pcb, int proto); /* a network protocol has come up */
void np_down(ppp_pcb *pcb, int proto); /* a network protocol has gone down */
void np_finished(ppp_pcb *pcb, int proto); /* a network protocol no longer needs link */
#if PPP_AUTH_SUPPORT
int get_secret(ppp_pcb *pcb, const char *client, const char *server, char *secret, int *secret_len, int am_server);
/* get "secret" for chap */
#endif /* PPP_AUTH_SUPPORT */
/* Procedures exported from ipcp.c */
/* int parse_dotted_ip (char *, u32_t *); */
/* Procedures exported from demand.c */
#if DEMAND_SUPPORT
void demand_conf (void); /* config interface(s) for demand-dial */
void demand_block (void); /* set all NPs to queue up packets */
void demand_unblock (void); /* set all NPs to pass packets */
void demand_discard (void); /* set all NPs to discard packets */
void demand_rexmit (int, u32_t); /* retransmit saved frames for an NP*/
int loop_chars (unsigned char *, int); /* process chars from loopback */
int loop_frame (unsigned char *, int); /* should we bring link up? */
#endif /* DEMAND_SUPPORT */
/* Procedures exported from multilink.c */
#ifdef HAVE_MULTILINK
void mp_check_options (void); /* Check multilink-related options */
int mp_join_bundle (void); /* join our link to an appropriate bundle */
void mp_exit_bundle (void); /* have disconnected our link from bundle */
void mp_bundle_terminated (void);
char *epdisc_to_str (struct epdisc *); /* string from endpoint discrim. */
int str_to_epdisc (struct epdisc *, char *); /* endpt disc. from str */
#else
#define mp_bundle_terminated() /* nothing */
#define mp_exit_bundle() /* nothing */
#define doing_multilink 0
#define multilink_master 0
#endif
/* Procedures exported from utils.c. */
void ppp_print_string(char *p, int len, void (*printer) (void *, const char *, ...), void *arg); /* Format a string for output */
int ppp_slprintf(char *buf, int buflen, const char *fmt, ...); /* sprintf++ */
int ppp_vslprintf(char *buf, int buflen, const char *fmt, va_list args); /* vsprintf++ */
size_t ppp_strlcpy(char *dest, const char *src, size_t len); /* safe strcpy */
size_t ppp_strlcat(char *dest, const char *src, size_t len); /* safe strncpy */
void ppp_dbglog(const char *fmt, ...); /* log a debug message */
void ppp_info(const char *fmt, ...); /* log an informational message */
void ppp_notice(const char *fmt, ...); /* log a notice-level message */
void ppp_warn(const char *fmt, ...); /* log a warning message */
void ppp_error(const char *fmt, ...); /* log an error message */
void ppp_fatal(const char *fmt, ...); /* log an error message and die(1) */
#if PRINTPKT_SUPPORT
void ppp_dump_packet(const char *tag, unsigned char *p, int len);
/* dump packet to debug log if interesting */
#endif /* PRINTPKT_SUPPORT */
#endif /* PPP_IMP_H_ */
#endif /* PPP_SUPPORT */