2 * Defines for synchronous PPP/Cisco/Frame Relay link level subroutines.
5 * Copyright (C) 1994-2000 Cronyx Engineering.
6 * Author: Serge Vakulenko, <vak@cronyx.ru>
8 * Heavily revamped to conform to RFC 1661.
9 * Copyright (C) 1997, Joerg Wunsch.
11 * This software is distributed with NO WARRANTIES, not even the implied
12 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 * Authors grant any other persons or organizations permission to use
15 * or modify this software as long as this message is kept with the software,
16 * all derivative works or modified versions.
18 * From: Version 2.0, Fri Oct 6 20:39:21 MSK 1995
21 #ifndef _NET_IF_SPPP_H_
22 #define _NET_IF_SPPP_H_ 1
24 #define IDX_LCP 0 /* idx into state table */
27 u_long opts; /* LCP options to send (bitfield) */
28 u_long magic; /* local magic number */
29 u_long mru; /* our max receive unit */
30 u_long their_mru; /* their max receive unit */
31 u_long protos; /* bitmask of protos that are started */
32 u_char echoid; /* id of last keepalive echo request */
33 /* restart max values, see RFC 1661 */
40 #define IDX_IPCP 1 /* idx into state table */
41 #define IDX_IPV6CP 2 /* idx into state table */
44 u_long opts; /* IPCP options to send (bitfield) */
46 #define IPCP_HISADDR_SEEN 1 /* have seen his address already */
47 #define IPCP_MYADDR_DYN 2 /* my address is dynamically assigned */
48 #define IPCP_MYADDR_SEEN 4 /* have seen his address already */
50 #define IPV6CP_MYIFID_DYN 8 /* my ifid is dynamically assigned */
52 #define IPV6CP_MYIFID_SEEN 0x10 /* have seen his ifid already */
53 #define IPCP_VJ 0x20 /* can use VJ compression */
54 int max_state; /* VJ: Max-Slot-Id */
55 int compress_cid; /* VJ: Comp-Slot-Id */
58 #define AUTHNAMELEN 64
62 u_short proto; /* authentication protocol to use */
64 #define AUTHFLAG_NOCALLOUT 1 /* do not require authentication on */
66 #define AUTHFLAG_NORECHALLENGE 2 /* do not re-challenge CHAP */
67 u_char name[AUTHNAMELEN]; /* system identification name */
68 u_char secret[AUTHKEYLEN]; /* secret password */
69 u_char challenge[AUTHKEYLEN]; /* random challenge */
75 #define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
78 * Don't change the order of this. Ordering the phases this way allows
79 * for a comparison of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
80 * know whether LCP is up.
83 PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
84 PHASE_AUTHENTICATE, PHASE_NETWORK
87 #define PP_MTU 1500 /* default/minimal MRU */
88 #define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
91 * This is a cut down struct sppp (see below) that can easily be
92 * exported to/ imported from userland without the need to include
93 * dozens of kernel-internal header files. It is used by the
94 * SPPPIO[GS]DEFS ioctl commands below.
97 enum ppp_phase pp_phase; /* phase we're currently in */
98 int enable_vj; /* VJ header compression enabled */
100 * Enable IPv6 negotiations -- only
101 * needed since each IPv4 i/f auto-
102 * matically gets an IPv6 address
103 * assigned, so we can't use this as
106 struct slcp lcp; /* LCP params */
107 struct sipcp ipcp; /* IPCP params */
108 struct sipcp ipv6cp; /* IPv6CP params */
109 struct sauth myauth; /* auth params, i'm peer */
110 struct sauth hisauth; /* auth params, i'm authenticator */
114 * Definitions to pass struct sppp_parms data down into the kernel
115 * using the SIOC[SG]IFGENERIC ioctl interface.
117 * In order to use this, create a struct spppreq, fill in the cmd
118 * field with SPPPIOGDEFS, and put the address of this structure into
119 * the ifr_data portion of a struct ifreq. Pass this struct to a
120 * SIOCGIFGENERIC ioctl. Then replace the cmd field by SPPPIOSDEFS,
121 * modify the defs field as desired, and pass the struct ifreq now
122 * to a SIOCSIFGENERIC ioctl.
125 #define SPPPIOGDEFS ((caddr_t)(('S' << 24) + (1 << 16) +\
126 sizeof(struct sppp_parms)))
127 #define SPPPIOSDEFS ((caddr_t)(('S' << 24) + (2 << 16) +\
128 sizeof(struct sppp_parms)))
132 struct sppp_parms defs;
137 struct ifnet *pp_ifp; /* network interface data */
138 struct ifqueue pp_fastq; /* fast output queue */
139 struct ifqueue pp_cpq; /* PPP control protocol queue */
140 struct sppp *pp_next; /* next interface in keepalive list */
141 u_int pp_mode; /* major protocol modes (cisco/ppp/...) */
142 u_int pp_flags; /* sub modes */
143 u_short pp_alivecnt; /* keepalive packets counter */
144 u_short pp_loopcnt; /* loopback detection counter */
145 u_long pp_seq[IDX_COUNT]; /* local sequence number */
146 u_long pp_rseq[IDX_COUNT]; /* remote sequence number */
147 enum ppp_phase pp_phase; /* phase we're currently in */
148 int state[IDX_COUNT]; /* state machine */
149 u_char confid[IDX_COUNT]; /* id of last configuration request */
150 int rst_counter[IDX_COUNT]; /* restart counter */
151 int fail_counter[IDX_COUNT]; /* negotiation failure counter */
152 int confflags; /* administrative configuration flags */
153 #define CONF_ENABLE_VJ 0x01 /* VJ header compression enabled */
154 #define CONF_ENABLE_IPV6 0x02 /* IPv6 administratively enabled */
155 time_t pp_last_recv; /* time last packet has been received */
156 time_t pp_last_sent; /* time last packet has been sent */
157 struct callout ch[IDX_COUNT]; /* per-proto and if callouts */
158 struct callout pap_my_to_ch; /* PAP needs one more... */
159 struct callout keepalive_callout; /* keepalive callout */
160 struct slcp lcp; /* LCP params */
161 struct sipcp ipcp; /* IPCP params */
162 struct sipcp ipv6cp; /* IPv6CP params */
163 struct sauth myauth; /* auth params, i'm peer */
164 struct sauth hisauth; /* auth params, i'm authenticator */
165 struct slcompress *pp_comp; /* for VJ compression */
166 u_short fr_dlci; /* Frame Relay DLCI number, 16..1023 */
167 u_char fr_status; /* PVC status, active/new/delete */
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.
176 void (*pp_up)(struct sppp *sp);
177 void (*pp_down)(struct sppp *sp);
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.
184 void (*pp_tls)(struct sppp *sp);
185 void (*pp_tlf)(struct sppp *sp);
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).
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 */
200 /* if_start () wrapper */
201 void (*if_start) (struct ifnet *);
202 struct callout ifstart_callout; /* if_start () scheduler */
204 #define IFP2SP(ifp) ((struct sppp *)(ifp)->if_l2com)
205 #define SP2IFP(sp) ((sp)->pp_ifp)
207 /* bits for pp_flags */
208 #define PP_KEEPALIVE 0x01 /* use keepalive protocol */
209 #define PP_FR 0x04 /* use Frame Relay protocol instead of PPP */
210 /* 0x04 was PP_TIMO */
211 #define PP_CALLIN 0x08 /* we are being called */
212 #define PP_NEEDAUTH 0x10 /* remote requested authentication */
214 void sppp_attach (struct ifnet *ifp);
215 void sppp_detach (struct ifnet *ifp);
216 void sppp_input (struct ifnet *ifp, struct mbuf *m);
217 int sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
218 struct mbuf *sppp_dequeue (struct ifnet *ifp);
219 struct mbuf *sppp_pick(struct ifnet *ifp);
220 int sppp_isempty (struct ifnet *ifp);
221 void sppp_flush (struct ifnet *ifp);
223 /* Internal functions */
224 void sppp_fr_input (struct sppp *sp, struct mbuf *m);
225 struct mbuf *sppp_fr_header (struct sppp *sp, struct mbuf *m, int fam);
226 void sppp_fr_keepalive (struct sppp *sp);
227 void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
232 #endif /* _NET_IF_SPPP_H_ */