294f53a5ec
IPv6 on an sppp interface. In an IPv6-enabled kernel, every IPv6 interface automatically gets an IPv6 address assigned (and IPv6 multicast packets sent at initialization time). For sppp links where we know our remote peer wouldn't support IPv6 at all, there's no point in attempting to negotiate IPV6CP (or to even dial out for an IPv6 packet at all for dial-on-demand interfaces). I wish there were a more generic way to administratively disable IPv6 on an interface instead. ume told me there isn't. While i was at it, converted both, enable_vj and enable_ipv6 into flag bits in struct sppp (enable_vj used to be an int of its own). MFC after: 1 month
216 lines
7.6 KiB
C
216 lines
7.6 KiB
C
/*
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* Defines for synchronous PPP/Cisco link level subroutines.
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*
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* Copyright (C) 1994 Cronyx Ltd.
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* Author: Serge Vakulenko, <vak@cronyx.ru>
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*
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* Heavily revamped to conform to RFC 1661.
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* Copyright (C) 1997, Joerg Wunsch.
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*
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* This software is distributed with NO WARRANTIES, not even the implied
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* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Authors grant any other persons or organizations permission to use
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* or modify this software as long as this message is kept with the software,
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* all derivative works or modified versions.
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*
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* From: Version 2.0, Fri Oct 6 20:39:21 MSK 1995
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*
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* $FreeBSD$
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*/
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#ifndef _NET_IF_SPPP_H_
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#define _NET_IF_SPPP_H_ 1
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#define IDX_LCP 0 /* idx into state table */
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struct slcp {
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u_long opts; /* LCP options to send (bitfield) */
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u_long magic; /* local magic number */
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u_long mru; /* our max receive unit */
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u_long their_mru; /* their max receive unit */
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u_long protos; /* bitmask of protos that are started */
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u_char echoid; /* id of last keepalive echo request */
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/* restart max values, see RFC 1661 */
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int timeout;
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int max_terminate;
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int max_configure;
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int max_failure;
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};
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#define IDX_IPCP 1 /* idx into state table */
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#define IDX_IPV6CP 2 /* idx into state table */
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struct sipcp {
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u_long opts; /* IPCP options to send (bitfield) */
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u_int flags;
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#define IPCP_HISADDR_SEEN 1 /* have seen his address already */
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#define IPCP_MYADDR_DYN 2 /* my address is dynamically assigned */
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#define IPCP_MYADDR_SEEN 4 /* have seen his address already */
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#ifdef notdef
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#define IPV6CP_MYIFID_DYN 8 /* my ifid is dynamically assigned */
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#endif
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#define IPV6CP_MYIFID_SEEN 0x10 /* have seen his ifid already */
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#define IPCP_VJ 0x20 /* can use VJ compression */
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int max_state; /* VJ: Max-Slot-Id */
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int compress_cid; /* VJ: Comp-Slot-Id */
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};
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#define AUTHNAMELEN 64
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#define AUTHKEYLEN 16
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struct sauth {
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u_short proto; /* authentication protocol to use */
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u_short flags;
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#define AUTHFLAG_NOCALLOUT 1 /* do not require authentication on */
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/* callouts */
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#define AUTHFLAG_NORECHALLENGE 2 /* do not re-challenge CHAP */
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u_char name[AUTHNAMELEN]; /* system identification name */
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u_char secret[AUTHKEYLEN]; /* secret password */
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u_char challenge[AUTHKEYLEN]; /* random challenge */
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};
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#define IDX_PAP 3
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#define IDX_CHAP 4
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#define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
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/*
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* Don't change the order of this. Ordering the phases this way allows
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* for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
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* know whether LCP is up.
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*/
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enum ppp_phase {
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PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
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PHASE_AUTHENTICATE, PHASE_NETWORK
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};
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#define PP_MTU 1500 /* default/minimal MRU */
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#define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
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/*
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* This is a cut down struct sppp (see below) that can easily be
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* exported to/ imported from userland without the need to include
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* dozens of kernel-internal header files. It is used by the
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* SPPPIO[GS]DEFS ioctl commands below.
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*/
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struct sppp_parms {
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enum ppp_phase pp_phase; /* phase we're currently in */
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int enable_vj; /* VJ header compression enabled */
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int enable_ipv6; /*
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* Enable IPv6 negotiations -- only
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* needed since each IPv4 i/f auto-
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* matically gets an IPv6 address
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* assigned, so we can't use this as
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* a decision.
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*/
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struct slcp lcp; /* LCP params */
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struct sipcp ipcp; /* IPCP params */
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struct sipcp ipv6cp; /* IPv6CP params */
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struct sauth myauth; /* auth params, i'm peer */
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struct sauth hisauth; /* auth params, i'm authenticator */
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};
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/*
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* Definitions to pass struct sppp_parms data down into the kernel
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* using the SIOC[SG]IFGENERIC ioctl interface.
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*
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* In order to use this, create a struct spppreq, fill in the cmd
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* field with SPPPIOGDEFS, and put the address of this structure into
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* the ifr_data portion of a struct ifreq. Pass this struct to a
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* SIOCGIFGENERIC ioctl. Then replace the cmd field by SPPPIOSDEFS,
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* modify the defs field as desired, and pass the struct ifreq now
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* to a SIOCSIFGENERIC ioctl.
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*/
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#define SPPPIOGDEFS ((caddr_t)(('S' << 24) + (1 << 16) +\
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sizeof(struct sppp_parms)))
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#define SPPPIOSDEFS ((caddr_t)(('S' << 24) + (2 << 16) +\
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sizeof(struct sppp_parms)))
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struct spppreq {
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int cmd;
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struct sppp_parms defs;
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};
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#ifdef _KERNEL
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struct sppp {
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/* NB: pp_if _must_ be first */
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struct ifnet pp_if; /* network interface data */
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struct ifqueue pp_fastq; /* fast output queue */
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struct ifqueue pp_cpq; /* PPP control protocol queue */
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struct sppp *pp_next; /* next interface in keepalive list */
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u_int pp_mode; /* major protocol modes (cisco/ppp/...) */
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u_int pp_flags; /* sub modes */
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u_short pp_alivecnt; /* keepalive packets counter */
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u_short pp_loopcnt; /* loopback detection counter */
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u_long pp_seq[IDX_COUNT]; /* local sequence number */
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u_long pp_rseq[IDX_COUNT]; /* remote sequence number */
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enum ppp_phase pp_phase; /* phase we're currently in */
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int state[IDX_COUNT]; /* state machine */
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u_char confid[IDX_COUNT]; /* id of last configuration request */
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int rst_counter[IDX_COUNT]; /* restart counter */
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int fail_counter[IDX_COUNT]; /* negotiation failure counter */
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int confflags; /* administrative configuration flags */
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#define CONF_ENABLE_VJ 0x01 /* VJ header compression enabled */
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#define CONF_ENABLE_IPV6 0x02 /* IPv6 administratively enabled */
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time_t pp_last_recv; /* time last packet has been received */
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time_t pp_last_sent; /* time last packet has been sent */
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struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
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struct callout_handle pap_my_to_ch; /* PAP needs one more... */
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struct slcp lcp; /* LCP params */
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struct sipcp ipcp; /* IPCP params */
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struct sipcp ipv6cp; /* IPv6CP params */
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struct sauth myauth; /* auth params, i'm peer */
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struct sauth hisauth; /* auth params, i'm authenticator */
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struct slcompress *pp_comp; /* for VJ compression */
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/*
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* These functions are filled in by sppp_attach(), and are
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* expected to be used by the lower layer (hardware) drivers
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* in order to communicate the (un)availability of the
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* communication link. Lower layer drivers that are always
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* ready to communicate (like hardware HDLC) can shortcut
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* pp_up from pp_tls, and pp_down from pp_tlf.
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*/
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void (*pp_up)(struct sppp *sp);
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void (*pp_down)(struct sppp *sp);
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/*
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* These functions need to be filled in by the lower layer
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* (hardware) drivers if they request notification from the
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* PPP layer whether the link is actually required. They
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* correspond to the tls and tlf actions.
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*/
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void (*pp_tls)(struct sppp *sp);
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void (*pp_tlf)(struct sppp *sp);
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/*
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* These (optional) functions may be filled by the hardware
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* driver if any notification of established connections
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* (currently: IPCP up) is desired (pp_con) or any internal
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* state change of the interface state machine should be
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* signaled for monitoring purposes (pp_chg).
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*/
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void (*pp_con)(struct sppp *sp);
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void (*pp_chg)(struct sppp *sp, int new_state);
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/* These two fields are for use by the lower layer */
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void *pp_lowerp;
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int pp_loweri;
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};
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/* bits for pp_flags */
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#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
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/* 0x04 was PP_TIMO */
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#define PP_CALLIN 0x08 /* we are being called */
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#define PP_NEEDAUTH 0x10 /* remote requested authentication */
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void sppp_attach (struct ifnet *ifp);
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void sppp_detach (struct ifnet *ifp);
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void sppp_input (struct ifnet *ifp, struct mbuf *m);
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int sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
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struct mbuf *sppp_dequeue (struct ifnet *ifp);
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struct mbuf *sppp_pick(struct ifnet *ifp);
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int sppp_isempty (struct ifnet *ifp);
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void sppp_flush (struct ifnet *ifp);
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#endif
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#endif /* _NET_IF_SPPP_H_ */
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