The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/net/if_spppvar.h

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    1 /*      $NetBSD: if_spppvar.h,v 1.11 2005/12/10 23:21:38 elad Exp $     */
    2 
    3 #ifndef _NET_IF_SPPPVAR_H_
    4 #define _NET_IF_SPPPVAR_H_
    5 
    6 /*
    7  * Defines for synchronous PPP/Cisco link level subroutines.
    8  *
    9  * Copyright (C) 1994 Cronyx Ltd.
   10  * Author: Serge Vakulenko, <vak@cronyx.ru>
   11  *
   12  * Heavily revamped to conform to RFC 1661.
   13  * Copyright (C) 1997, Joerg Wunsch.
   14  *
   15  * This software is distributed with NO WARRANTIES, not even the implied
   16  * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   17  *
   18  * Authors grant any other persons or organizations permission to use
   19  * or modify this software as long as this message is kept with the software,
   20  * all derivative works or modified versions.
   21  *
   22  * From: Version 2.0, Fri Oct  6 20:39:21 MSK 1995
   23  *
   24  * From: if_sppp.h,v 1.8 1997/10/11 11:25:20 joerg Exp
   25  *
   26  * From: Id: if_sppp.h,v 1.7 1998/12/01 20:20:19 hm Exp
   27  */
   28 
   29 #define IDX_LCP 0               /* idx into state table */
   30 
   31 struct slcp {
   32         u_long  opts;           /* LCP options to send (bitfield) */
   33         u_long  magic;          /* local magic number */
   34         u_long  mru;            /* our max receive unit */
   35         u_long  their_mru;      /* their max receive unit */
   36         u_long  protos;         /* bitmask of protos that are started */
   37         u_char  echoid;         /* id of last keepalive echo request */
   38         /* restart max values, see RFC 1661 */
   39         int     timeout;
   40         int     max_terminate;
   41         int     max_configure;
   42         int     max_failure;
   43 };
   44 
   45 #define IDX_IPCP 1              /* idx into state table */
   46 #define IDX_IPV6CP 2            /* idx into state table */
   47 
   48 struct sipcp {
   49         u_long  opts;           /* IPCP options to send (bitfield) */
   50         u_int   flags;
   51 #define IPCP_HISADDR_SEEN 1     /* have seen his address already */
   52 #define IPCP_MYADDR_SEEN  2     /* have a local address assigned already */
   53 #define IPCP_MYADDR_DYN   4     /* my address is dynamically assigned */
   54 #define IPCP_HISADDR_DYN  8     /* his address is dynamically assigned */
   55 #ifdef notdef
   56 #define IPV6CP_MYIFID_DYN   2   /* my ifid is dynamically assigned */
   57 #endif
   58 #define IPV6CP_MYIFID_SEEN  4   /* have seen his ifid already */
   59         u_int32_t saved_hisaddr;/* if hisaddr (IPv4) is dynamic, save original one here, in network byte order */
   60         u_int32_t req_hisaddr;  /* remote address requested */
   61         u_int32_t req_myaddr;   /* local address requested */
   62 };
   63 
   64 struct sauth {
   65         u_short proto;                  /* authentication protocol to use */
   66         u_short flags;
   67         char    *name;                  /* system identification name */
   68         char    *secret;                /* secret password */
   69         u_char  name_len;               /* no need to have a bigger size */
   70         u_char  secret_len;             /* because proto gives size in a byte */
   71         char    challenge[16];          /* random challenge [don't change size! it's really hardcoded!] */
   72 };
   73 
   74 #define IDX_PAP         3
   75 #define IDX_CHAP        4
   76 
   77 #define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
   78 
   79 struct sppp {
   80         /* NB: pp_if _must_ be first */
   81         struct  ifnet pp_if;    /* network interface data */
   82         struct  ifqueue pp_fastq; /* fast output queue */
   83         struct  ifqueue pp_cpq; /* PPP control protocol queue */
   84         struct  sppp *pp_next;  /* next interface in keepalive list */
   85         u_int   pp_flags;       /* use Cisco protocol instead of PPP */
   86         u_int   pp_framebytes;  /* number of bytes added by (hardware) framing */
   87         u_int   pp_alivecnt;    /* keepalive packets counter */
   88         u_int   pp_loopcnt;     /* loopback detection counter */
   89         u_int   pp_maxalive;    /* number or echo req. w/o reply */
   90         u_long  pp_seq[IDX_COUNT];      /* local sequence number */
   91         u_long  pp_rseq[IDX_COUNT];     /* remote sequence number */
   92         u_quad_t        pp_saved_mtu;   /* saved MTU value */
   93         time_t  pp_last_receive;        /* peer's last "sign of life" */
   94         time_t  pp_max_noreceive;       /* seconds since last receive before
   95                                            we start to worry and send echo
   96                                            requests */
   97         time_t  pp_last_activity;       /* second of last payload data s/r */
   98         time_t  pp_idle_timeout;        /* idle seconds before auto-disconnect,
   99                                          * 0 = disabled */
  100         int     pp_auth_failures;       /* authorization failures */
  101         int     pp_max_auth_fail;       /* max. allowed authorization failures */
  102         int     pp_phase;       /* phase we're currently in */
  103         int     query_dns;      /* 1 if we want to know the dns addresses */
  104         u_int32_t       dns_addrs[2];
  105         int     state[IDX_COUNT];       /* state machine */
  106         u_char  confid[IDX_COUNT];      /* id of last configuration request */
  107         int     rst_counter[IDX_COUNT]; /* restart counter */
  108         int     fail_counter[IDX_COUNT]; /* negotiation failure counter */
  109 #if defined(__NetBSD__)
  110         struct  callout ch[IDX_COUNT];  /* per-proto and if callouts */
  111         struct  callout pap_my_to_ch;   /* PAP needs one more... */
  112 #endif
  113 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
  114         struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
  115         struct callout_handle pap_my_to_ch; /* PAP needs one more... */
  116 #endif
  117         struct slcp lcp;                /* LCP params */
  118         struct sipcp ipcp;              /* IPCP params */
  119         struct sipcp ipv6cp;            /* IPv6CP params */
  120         struct sauth myauth;            /* auth params, i'm peer */
  121         struct sauth hisauth;           /* auth params, i'm authenticator */
  122         /*
  123          * These functions are filled in by sppp_attach(), and are
  124          * expected to be used by the lower layer (hardware) drivers
  125          * in order to communicate the (un)availability of the
  126          * communication link.  Lower layer drivers that are always
  127          * ready to communicate (like hardware HDLC) can shortcut
  128          * pp_up from pp_tls, and pp_down from pp_tlf.
  129          */
  130         void    (*pp_up)(struct sppp *);
  131         void    (*pp_down)(struct sppp *);
  132         /*
  133          * These functions need to be filled in by the lower layer
  134          * (hardware) drivers if they request notification from the
  135          * PPP layer whether the link is actually required.  They
  136          * correspond to the tls and tlf actions.
  137          */
  138         void    (*pp_tls)(struct sppp *);
  139         void    (*pp_tlf)(struct sppp *);
  140         /*
  141          * These (optional) functions may be filled by the hardware
  142          * driver if any notification of established connections
  143          * (currently: IPCP up) is desired (pp_con) or any internal
  144          * state change of the interface state machine should be
  145          * signaled for monitoring purposes (pp_chg).
  146          */
  147         void    (*pp_con)(struct sppp *);
  148         void    (*pp_chg)(struct sppp *, int);
  149 };
  150 
  151 #define PP_KEEPALIVE    0x01    /* use keepalive protocol */
  152 #define PP_CISCO        0x02    /* use Cisco protocol instead of PPP */
  153                                 /* 0x04 was PP_TIMO */
  154 #define PP_CALLIN       0x08    /* we are being called */
  155 #define PP_NEEDAUTH     0x10    /* remote requested authentication */
  156 #define PP_NOFRAMING    0x20    /* do not add/expect encapsulation
  157                                    around PPP frames (i.e. the serial
  158                                    HDLC like encapsulation, RFC1662) */
  159 
  160 
  161 #define PP_MTU          1500    /* default/minimal MRU */
  162 #define PP_MAX_MRU      2048    /* maximal MRU we want to negotiate */
  163 
  164 #ifdef _KERNEL
  165 void sppp_attach (struct ifnet *);
  166 void sppp_detach (struct ifnet *);
  167 void sppp_input (struct ifnet *, struct mbuf *);
  168 int sppp_ioctl(struct ifnet *, u_long, void *);
  169 struct mbuf *sppp_dequeue (struct ifnet *);
  170 int sppp_isempty (struct ifnet *);
  171 void sppp_flush (struct ifnet *);
  172 #endif
  173 #endif /* !_NET_IF_SPPPVAR_H_ */

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