sys/net/sppp/if_sppp.h

   1 /*
   2  * Defines for synchronous PPP/Cisco link level subroutines.
   3  *
   4  * Copyright (C) 1994 Cronyx Ltd.
   5  * Author: Serge Vakulenko, <vak@cronyx.ru>
   6  *
   7  * Heavily revamped to conform to RFC 1661.
   8  * Copyright (C) 1997, Joerg Wunsch.
   9  *
  10  * This software is distributed with NO WARRANTIES, not even the implied
  11  * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12  *
  13  * Authors grant any other persons or organizations permission to use
  14  * or modify this software as long as this message is kept with the software,
  15  * all derivative works or modified versions.
  16  *
  17  * From: Version 2.0, Fri Oct  6 20:39:21 MSK 1995
  18  *
  19  * $FreeBSD: src/sys/net/if_sppp.h,v 1.16.2.3 2002/04/24 18:45:25 joerg Exp $
  20  * $DragonFly: src/sys/net/sppp/if_sppp.h,v 1.3 2004/09/16 03:54:37 dillon Exp $
  21  */
  22
  23 #ifndef _NET_IF_SPPP_H_
  24 #define _NET_IF_SPPP_H_ 1
  25
  26 #define IDX_LCP 0               /* idx into state table */
  27
  28 struct slcp {
  29         u_long  opts;           /* LCP options to send (bitfield) */
  30         u_long  magic;          /* local magic number */
  31         u_long  mru;            /* our max receive unit */
  32         u_long  their_mru;      /* their max receive unit */
  33         u_long  protos;         /* bitmask of protos that are started */
  34         u_char  echoid;         /* id of last keepalive echo request */
  35         /* restart max values, see RFC 1661 */
  36         int     timeout;
  37         int     max_terminate;
  38         int     max_configure;
  39         int     max_failure;
  40 };
  41
  42 #define IDX_IPCP 1              /* idx into state table */
  43 #define IDX_IPV6CP 2            /* idx into state table */
  44
  45 struct sipcp {
  46         u_long  opts;           /* IPCP options to send (bitfield) */
  47         u_int   flags;
  48 #define IPCP_HISADDR_SEEN 1     /* have seen his address already */
  49 #define IPCP_MYADDR_DYN   2     /* my address is dynamically assigned */
  50 #define IPCP_MYADDR_SEEN  4     /* have seen his address already */
  51 #ifdef notdef
  52 #define IPV6CP_MYIFID_DYN 8     /* my ifid is dynamically assigned */
  53 #endif
  54 #define IPV6CP_MYIFID_SEEN 0x10 /* have seen his ifid already */
  55 #define IPCP_VJ         0x20    /* can use VJ compression */
  56         int     max_state;      /* VJ: Max-Slot-Id */
  57         int     compress_cid;   /* VJ: Comp-Slot-Id */
  58 };
  59
  60 #define AUTHNAMELEN     64
  61 #define AUTHKEYLEN      16
  62
  63 struct sauth {
  64         u_short proto;                  /* authentication protocol to use */
  65         u_short flags;
  66 #define AUTHFLAG_NOCALLOUT      1       /* do not require authentication on */
  67                                         /* callouts */
  68 #define AUTHFLAG_NORECHALLENGE  2       /* do not re-challenge CHAP */
  69         u_char  name[AUTHNAMELEN];      /* system identification name */
  70         u_char  secret[AUTHKEYLEN];     /* secret password */
  71         u_char  challenge[AUTHKEYLEN];  /* random challenge */
  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 /*
  80  * Don't change the order of this.  Ordering the phases this way allows
  81  * for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
  82  * know whether LCP is up.
  83  */
  84 enum ppp_phase {
  85         PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
  86         PHASE_AUTHENTICATE, PHASE_NETWORK
  87 };
  88
  89 #define PP_MTU          1500    /* default/minimal MRU */
  90 #define PP_MAX_MRU      2048    /* maximal MRU we want to negotiate */
  91
  92 /*
  93  * This is a cut down struct sppp (see below) that can easily be
  94  * exported to/ imported from userland without the need to include
  95  * dozens of kernel-internal header files.  It is used by the
  96  * SPPPIO[GS]DEFS ioctl commands below.
  97  */
  98 struct sppp_parms {
  99         enum ppp_phase pp_phase;        /* phase we're currently in */
 100         int     enable_vj;              /* VJ header compression enabled */
 101         int     enable_ipv6;            /*
 102                                          * Enable IPv6 negotiations -- only
 103                                          * needed since each IPv4 i/f auto-
 104                                          * matically gets an IPv6 address
 105                                          * assigned, so we can't use this as
 106                                          * a decision.
 107                                          */
 108         struct slcp lcp;                /* LCP params */
 109         struct sipcp ipcp;              /* IPCP params */
 110         struct sipcp ipv6cp;            /* IPv6CP params */
 111         struct sauth myauth;            /* auth params, i'm peer */
 112         struct sauth hisauth;           /* auth params, i'm authenticator */
 113 };
 114
 115 /*
 116  * Definitions to pass struct sppp_parms data down into the kernel
 117  * using the SIOC[SG]IFGENERIC ioctl interface.
 118  *
 119  * In order to use this, create a struct spppreq, fill in the cmd
 120  * field with SPPPIOGDEFS, and put the address of this structure into
 121  * the ifr_data portion of a struct ifreq.  Pass this struct to a
 122  * SIOCGIFGENERIC ioctl.  Then replace the cmd field by SPPPIOSDEFS,
 123  * modify the defs field as desired, and pass the struct ifreq now
 124  * to a SIOCSIFGENERIC ioctl.
 125  */
 126
 127 #define SPPPIOGDEFS  ((caddr_t)(('S' << 24) + (1 << 16) +\
 128         sizeof(struct sppp_parms)))
 129 #define SPPPIOSDEFS  ((caddr_t)(('S' << 24) + (2 << 16) +\
 130         sizeof(struct sppp_parms)))
 131
 132 struct spppreq {
 133         int     cmd;
 134         struct sppp_parms defs;
 135 };
 136
 137 #ifdef _KERNEL
 138 struct sppp {
 139         /* NB: pp_if _must_ be first */
 140         struct  ifnet pp_if;    /* network interface data */
 141         struct  ifqueue pp_fastq; /* fast output queue */
 142         struct  ifqueue pp_cpq; /* PPP control protocol queue */
 143         struct  sppp *pp_next;  /* next interface in keepalive list */
 144         u_int   pp_mode;        /* major protocol modes (cisco/ppp/...) */
 145         u_int   pp_flags;       /* sub modes */
 146         u_short pp_alivecnt;    /* keepalive packets counter */
 147         u_short pp_loopcnt;     /* loopback detection counter */
 148         u_long  pp_seq[IDX_COUNT];      /* local sequence number */
 149         u_long  pp_rseq[IDX_COUNT];     /* remote sequence number */
 150         enum ppp_phase pp_phase;        /* phase we're currently in */
 151         int     state[IDX_COUNT];       /* state machine */
 152         u_char  confid[IDX_COUNT];      /* id of last configuration request */
 153         int     rst_counter[IDX_COUNT]; /* restart counter */
 154         int     fail_counter[IDX_COUNT]; /* negotiation failure counter */
 155         int     confflags;      /* administrative configuration flags */
 156 #define CONF_ENABLE_VJ    0x01  /* VJ header compression enabled */
 157 #define CONF_ENABLE_IPV6  0x02  /* IPv6 administratively enabled */
 158         time_t  pp_last_recv;   /* time last packet has been received */
 159         time_t  pp_last_sent;   /* time last packet has been sent */
 160         struct callout timeout[IDX_COUNT]; /* per-proto and if callouts */
 161         struct callout pap_my_to;       /* PAP needs one more... */
 162         struct slcp lcp;                /* LCP params */
 163         struct sipcp ipcp;              /* IPCP params */
 164         struct sipcp ipv6cp;            /* IPv6CP params */
 165         struct sauth myauth;            /* auth params, i'm peer */
 166         struct sauth hisauth;           /* auth params, i'm authenticator */
 167         struct slcompress *pp_comp;     /* for VJ compression */
 168         /*
 169          * These functions are filled in by sppp_attach(), and are
 170          * expected to be used by the lower layer (hardware) drivers
 171          * in order to communicate the (un)availability of the
 172          * communication link.  Lower layer drivers that are always
 173          * ready to communicate (like hardware HDLC) can shortcut
 174          * pp_up from pp_tls, and pp_down from pp_tlf.
 175          */
 176         void    (*pp_up)(struct sppp *sp);
 177         void    (*pp_down)(struct sppp *sp);
 178         /*
 179          * These functions need to be filled in by the lower layer
 180          * (hardware) drivers if they request notification from the
 181          * PPP layer whether the link is actually required.  They
 182          * correspond to the tls and tlf actions.
 183          */
 184         void    (*pp_tls)(struct sppp *sp);
 185         void    (*pp_tlf)(struct sppp *sp);
 186         /*
 187          * These (optional) functions may be filled by the hardware
 188          * driver if any notification of established connections
 189          * (currently: IPCP up) is desired (pp_con) or any internal
 190          * state change of the interface state machine should be
 191          * signaled for monitoring purposes (pp_chg).
 192          */
 193         void    (*pp_con)(struct sppp *sp);
 194         void    (*pp_chg)(struct sppp *sp, int new_state);
 195         /* These two fields are for use by the lower layer */
 196         void    *pp_lowerp;
 197         int     pp_loweri;
 198 };
 199
 200 /* bits for pp_flags */
 201 #define PP_KEEPALIVE    0x01    /* use keepalive protocol */
 202                                 /* 0x04 was PP_TIMO */
 203 #define PP_CALLIN       0x08    /* we are being called */
 204 #define PP_NEEDAUTH     0x10    /* remote requested authentication */
 205
 206 void sppp_attach (struct ifnet *ifp);
 207 void sppp_detach (struct ifnet *ifp);
 208 void sppp_input (struct ifnet *ifp, struct mbuf *m);
 209 int sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
 210 struct mbuf *sppp_dequeue (struct ifnet *ifp);
 211 struct mbuf *sppp_pick(struct ifnet *ifp);
 212 int sppp_isempty (struct ifnet *ifp);
 213 void sppp_flush (struct ifnet *ifp);
 214 #endif
 215
 216 #endif /* _NET_IF_SPPP_H_ */