* Copyright (C) Dirk Husemann, Computer Science Department IV,
* University of Erlangen-Nuremberg, Germany, 1990, 1991, 1992
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* This code is derived from software contributed to Berkeley by
* Dirk Husemann and the Computer Science Department (IV) of
* the University of Erlangen-Nuremberg, Germany.
* %sccs.include.redist.c%
* @(#)llc_var.h 8.1 (Berkeley) %G%
* Forward structure declarations for function prototypes [sic].
struct llc_linkcb
*NE_link
;
/* SAP info for unconfigured incoming calls */
#define LLC_CLASS_III 0x4 /* Future */
#define LLC_CLASS_IV 0x7 /* Future */
__P((int, struct sockaddr
*, caddr_t
));
#define np_link NESIun.NE.NE_link
#define np_rt NESIun.NE.NE_rt
#define si_class NESIun.SI.SI_class
#define si_window NESIun.SI.SI_window
#define si_trace NESIun.SI.SI_trace
#define si_xchxid NESIun.SI.SI_xchxid
#define si_input NESIun.SI.SI_input
#define si_ctlinput NESIun.SI.SI_ctlinput
#define NPDL_SAPNETMASK 0x7e
* Definitions for accessing bitfields/bitslices inside
#define LLCGBITS(Arg, Index) (((Arg) & llc_bitslice[(Index)].bs_mask) >> llc_bitslice[(Index)].bs_shift)
#define LLCSBITS(Arg, Index, Val) (Arg) |= (((Val) << llc_bitslice[(Index)].bs_shift) & llc_bitslice[(Index)].bs_mask)
#define LLCCSBITS(Arg, Index, Val) (Arg) = (((Val) << llc_bitslice[(Index)].bs_shift) & llc_bitslice[(Index)].bs_mask)
extern struct bitslice llc_bitslice
[];
* LLC events --- These events may either be frames received from the
* remote LLC DSAP, request from the network layer user,
* timer events from llc_timer(), or diagnostic events from
#define LLCFT_INFO 0 * LLC_MAXCMDRSP
#define LLCFT_RR 1 * LLC_MAXCMDRSP
#define LLCFT_RNR 2 * LLC_MAXCMDRSP
#define LLCFT_REJ 3 * LLC_MAXCMDRSP
#define LLCFT_DM 4 * LLC_MAXCMDRSP
#define LLCFT_SABME 5 * LLC_MAXCMDRSP
#define LLCFT_DISC 6 * LLC_MAXCMDRSP
#define LLCFT_UA 7 * LLC_MAXCMDRSP
#define LLCFT_FRMR 8 * LLC_MAXCMDRSP
#define LLCFT_UI 9 * LLC_MAXCMDRSP
#define LLCFT_XID 10 * LLC_MAXCMDRSP
#define LLCFT_TEST 11 * LLC_MAXCMDRSP
#define LLC_ACK_TIMER_EXPIRED 12 * LLC_MAXCMDRSP
#define LLC_P_TIMER_EXPIRED 13 * LLC_MAXCMDRSP
#define LLC_REJ_TIMER_EXPIRED 14 * LLC_MAXCMDRSP
#define LLC_BUSY_TIMER_EXPIRED 15 * LLC_MAXCMDRSP
/* LLC2 diagnostic events */
#define LLC_INVALID_NR 16 * LLC_MAXCMDRSP
#define LLC_INVALID_NS 17 * LLC_MAXCMDRSP
#define LLC_BAD_PDU 18 * LLC_MAXCMDRSP
#define LLC_LOCAL_BUSY_DETECTED 19 * LLC_MAXCMDRSP
#define LLC_LOCAL_BUSY_CLEARED 20 * LLC_MAXCMDRSP
/* Network layer user requests */
* NL_CONNECT_REQUEST --- The user has requested that a data link connection
* be established with a remote LLC DSAP.
#define NL_CONNECT_REQUEST 21 * LLC_MAXCMDRSP
* NL_CONNECT_RESPONSE --- The user has accepted the data link connection.
#define NL_CONNECT_RESPONSE 22 * LLC_MAXCMDRSP
* NL_RESET_REQUEST --- The user has requested that the data link with the
* remote LLC DSAP be reset.
#define NL_RESET_REQUEST 23 * LLC_MAXCMDRSP
* NL_RESET_RESPONSE --- The user has accepted the reset of the data link
#define NL_RESET_RESPONSE 24 * LLC_MAXCMDRSP
* NL_DISCONNECT_REQUEST --- The user has requested that the data link
* connection with remote LLC DSAP be terminated.
#define NL_DISCONNECT_REQUEST 25 * LLC_MAXCMDRSP
* NL_DATA_REQUEST --- The user has requested that a data unit be sent ot the
#define NL_DATA_REQUEST 26 * LLC_MAXCMDRSP
* NL_INITIATE_PF_CYCLE --- The local LLC wants to initiate a P/F cycle.
#define NL_INITIATE_PF_CYCLE 27 * LLC_MAXCMDRSP
* NL_LOCAL_BUSY_DETECTED --- The local entity has encountered a busy condition
#define NL_LOCAL_BUSY_DETECTED 28 * LLC_MAXCMDRSP
/* return message from state handlers */
* LLC_CONNECT_INDICATION --- Inform the user that a connection has been
* requested by a remote LLC SSAP.
#define LLC_CONNECT_INDICATION 1
* LLC_CONNECT_CONFIRM --- The connection service component indicates that the
* remote network entity has accepted the connection.
#define LLC_CONNECT_CONFIRM 2
* LLC_DISCONNECT_INDICATION --- Inform the user that the remote network
* entity has intiated disconnection of the data
#define LLC_DISCONNECT_INDICATION 3
* LLC_RESET_CONFIRM --- The connection service component indicates that the
* remote network entity has accepted the reset.
#define LLC_RESET_CONFIRM 4
* LLC_RESET_INDICATION_REMOTE --- The remote network entity or remote peer
* has initiated a reset of the data link
#define LLC_RESET_INDICATION_REMOTE 5
* LLC_RESET_INDICATION_LOCAL --- The local LLC has determined that the data
* link connection is in need of
#define LLC_RESET_INDICATION_LOCAL 6
* LLC_FRMR_RECEIVED --- The local connection service component has received a
#define LLC_FRMR_RECEIVED 7
* LLC_FRMR_SENT --- The local connection component has received an ivalid
* PDU, and has sent a FRMR response PDU.
* LLC_DATA_INDICATION --- The connection service component passes the data
* unit from the received I PDU to the user.
#define LLC_DATA_INDICATION 9
* LLC_REMOTE_NOT_BUSY --- The remote LLC DSAP is no longer busy. The local
* connection service component will now accept a
#define LLC_REMOTE_NOT_BUSY 10
* LLC_REMOTE_BUSY --- The remote LLC DSAP is busy. The local connection
* service component will not accept a DATA_REQUEST.
#define LLC_REMOTE_BUSY 11
/* Internal return code */
#define INFORMATION_CONTROL 0x00
#define SUPERVISORY_CONTROL 0x02
#define UNUMBERED_CONTROL 0x03
* Other necessary definitions
#define LLC_MAX_SEQUENCE 128
#define LLC_MAX_WINDOW 127
#define LLC_WINDOW_SIZE 7
* Don't we love this one? CCITT likes to suck on bits 8=)
struct llccb_q
*q_forw
; /* admin chain */
struct npaidbentry
*llcl_sapinfo
; /* SAP information */
struct sockaddr_dl llcl_addr
; /* link snpa address */
struct rtentry
*llcl_nlrt
; /* layer 3 -> LLC */
struct rtentry
*llcl_llrt
; /* LLC -> layer 3 */
struct ifnet
*llcl_if
; /* our interface */
caddr_t llcl_nlnext
; /* cb for network layer */
struct mbuf
*llcl_writeqh
; /* Write queue head */
struct mbuf
*llcl_writeqt
; /* Write queue tail */
struct mbuf
**llcl_output_buffers
;
short llcl_timers
[6]; /* timer array */
long llcl_timerflags
; /* flags signalling running timers */
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llcl_REMOTE_BUSY_flag
;
int llcl_DACTION_flag
; /* delayed action */
* The following components deal --- in one way or the other ---
* with the LLC2 window. Indicated by either [L] or [W] is the
* domain of the specific component:
* [L] The domain is 0--LLC_MAX_WINDOW
* [W] The domain is 0--llcl_window
short llcl_vr
; /* next to receive [L] */
short llcl_vs
; /* next to send [L] */
short llcl_nr_received
; /* next frame to b ack'd [L] */
short llcl_freeslot
; /* next free slot [W] */
short llcl_projvs
; /* V(S) associated with freeslot */
short llcl_slotsfree
; /* free slots [W] */
short llcl_window
; /* window size */
* In llcl_frmrinfo we jot down the last frmr info field, which we
* need to do as we need to be able to resend it in the ERROR state.
struct frmrinfo llcl_frmrinfo
; /* last FRMR info field */
#define llcl_frmr_pdu0 llcl_frmrinfo.rej_pdu_0
#define llcl_frmr_pdu1 llcl_frmrinfo.rej_pdu_1
#define llcl_frmr_control llcl_frmrinfo.frmr_control
#define llcl_frmr_control_ext llcl_frmrinfo.frmr_control_ext
#define llcl_frmr_cause llcl_frmrinfo.frmr_cause
#define LQNEXT(l) (struct llc_linkcb *)((l)->llcl_q.q_forw)
#define LQEMPTY (llccb_q.q_forw == &llccb_q)
#define LQFIRST (struct llc_linkcb *)(llccb_q.q_forw)
#define LQVALID(l) (!((struct llccb_q *)(l) == &llccb_q))
#define LLC_ENQUEUE(l, m) if ((l)->llcl_writeqh == NULL) { \
(l)->llcl_writeqh = (m); \
(l)->llcl_writeqt = (m); \
(l)->llcl_writeqt->m_nextpkt = (m); \
(l)->llcl_writeqt = (m); \
#define LLC_DEQUEUE(l, m) if ((l)->llcl_writeqh == NULL) \
(m) = (l)->llcl_writeqh; \
(l)->llcl_writeqh = (l)->llcl_writeqh->m_nextpkt; \
#define LLC_SETFRAME(l, m) { \
if ((l)->llcl_slotsfree > 0) { \
(l)->llcl_output_buffers[(l)->llcl_freeslot] = (m); \
(l)->llcl_freeslot = ((l)->llcl_freeslot+1) % (l)->llcl_window; \
LLC_INC((l)->llcl_projvs); \
* handling of sockaddr_dl's
#define LLADDRLEN(s) ((s)->sdl_alen + (s)->sdl_nlen)
#define LLSAPADDR(s) ((s)->sdl_data[LLADDRLEN(s)-1] & 0xff)
#define LLSAPLOC(s, if) ((s)->sdl_nlen + (if)->if_addrlen)
struct sockaddr_dl sdlhdr_dst
;
struct sockaddr_dl sdlhdr_src
;
#define LLC_GETHDR(f,m) { \
struct mbuf *_m = (struct mbuf *) (m); \
M_PREPEND(_m, LLC_ISFRAMELEN, M_DONTWAIT); \
bzero(mtod(_m, caddr_t), LLC_ISFRAMELEN); \
MGETHDR (_m, M_DONTWAIT, MT_HEADER); \
_m->m_pkthdr.len = _m->m_len = LLC_UFRAMELEN; \
_m->m_next = _m->m_act = NULL; \
bzero(mtod(_m, caddr_t), LLC_UFRAMELEN); \
(f) = mtod(m, struct llc *); \
#define LLC_NEWSTATE(l, LLCstate) (l)->llcl_statehandler = llc_state_##LLCstate
#define LLC_STATEEQ(l, LLCstate) ((l)->llcl_statehandler == llc_state_##LLCstate ? 1 : 0)
#define LLC_DACTION_SHIFT 5
#define LLC_TIMER_NOTRUNNING 0
#define LLC_TIMER_RUNNING 1
#define LLC_TIMER_EXPIRED 2
#define LLC_STARTTIMER(l, LLCtimer) { \
(l)->llcl_timers[LLC_##LLCtimer##_SHIFT] = llc_##LLCtimer##_timer; \
(l)->llcl_timerflags |= (1<<LLC_##LLCtimer##_SHIFT); \
#define LLC_STOPTIMER(l, LLCtimer) { \
(l)->llcl_timers[LLC_##LLCtimer##_SHIFT] = 0; \
(l)->llcl_timerflags &= ~(1<<LLC_##LLCtimer##_SHIFT); \
#define LLC_AGETIMER(l, LLCtimer) if ((l)->llcl_timers[LLC_##LLCtimer##_SHIFT] > 0) \
(l)->llcl_timers[LLC_##LLCtimer##_SHIFT]--;
#define LLC_TIMERXPIRED(l, LLCtimer) \
(((l)->llcl_timerflags & (1<<LLC_##LLCtimer##_SHIFT)) ? \
(((l)->llcl_timers[LLC_##LLCtimer##_SHIFT] == 0 ) ? \
LLC_TIMER_EXPIRED : LLC_TIMER_RUNNING) : LLC_TIMER_NOTRUNNING)
#define FOR_ALL_LLC_TIMERS(t) for ((t) = LLC_ACK_SHIFT; (t) < LLC_AGE_SHIFT; (t)++)
#define LLC_SETFLAG(l, LLCflag, v) (l)->llcl_##LLCflag##_flag = (v)
#define LLC_GETFLAG(l, LLCflag) (l)->llcl_##LLCflag##_flag
#define LLC_RESETCOUNTER(l) { \
(l)->llcl_vs = (l)->llcl_vr = (l)->llcl_retry = 0; \
#define LLC_START_ACK_TIMER(l) LLC_STARTTIMER((l), ACK)
#define LLC_STOP_ACK_TIMER(l) LLC_STOPTIMER((l), ACK)
#define LLC_START_REJ_TIMER(l) LLC_STARTTIMER((l), REJ)
#define LLC_STOP_REJ_TIMER(l) LLC_STOPTIMER((l), REJ)
#define LLC_START_P_TIMER(l) { \
LLC_STARTTIMER((l), P); \
if (LLC_GETFLAG((l), P) == 0) \
LLC_SETFLAG((l), P, 1); \
#define LLC_STOP_P_TIMER(l) { \
LLC_SETFLAG((l), P, 0); \
#define LLC_STOP_ALL_TIMERS(l) { \
LLC_STOPTIMER((l), ACK); \
LLC_STOPTIMER((l), REJ); \
LLC_STOPTIMER((l), BUSY); \
#define LLC_INC(i) (i) = ((i)+1) % LLC_MAX_SEQUENCE
#define LLC_NR_VALID(l, nr) ((l)->llcl_vs < (l)->llcl_nr_received ? \
(((nr) >= (l)->llcl_nr_received) || \
((nr) <= (l)->llcl_vs) ? 1 : 0) : \
(((nr) <= (l)->llcl_vs) && \
((nr) >= (l)->llcl_nr_received) ? 1 : 0))
#define LLC_UPDATE_P_FLAG(l, cr, pf) { \
if ((cr) == LLC_RSP && (pf) == 1) { \
LLC_SETFLAG((l), P, 0); \
#define LLC_UPDATE_NR_RECEIVED(l, nr) { \
while ((l)->llcl_nr_received != (nr)) { \
if (_m = (l)->llcl_output_buffers[seq = llc_seq2slot((l), (l)->llcl_nr_received)]) \
(l)->llcl_output_buffers[seq] = NULL; \
LLC_INC((l)->llcl_nr_received); \
if ((l)->llcl_slotsfree < (l)->llcl_window) { \
LLC_START_ACK_TIMER(l); \
} else LLC_STOP_ACK_TIMER(l); \
LLC_STARTTIMER((l), DACTION); \
#define LLC_SET_REMOTE_BUSY(l,a) { \
if (LLC_GETFLAG((l), REMOTE_BUSY) == 0) { \
LLC_SETFLAG((l), REMOTE_BUSY, 1); \
LLC_STARTTIMER((l), BUSY); \
#define LLC_CLEAR_REMOTE_BUSY(l,a) { \
if (LLC_GETFLAG((l), REMOTE_BUSY) == 1) { \
LLC_SETFLAG((l), REMOTE_BUSY, 1); \
LLC_STOPTIMER((l), BUSY); \
if (LLC_STATEEQ((l), NORMAL) || \
LLC_STATEEQ((l), REJECT) || \
LLC_STATEEQ((l), BUSY)) \
llc_resend((l), LLC_CMD, 0); \
(a) = LLC_REMOTE_NOT_BUSY; \
#define LLC_DACKCMDPOLL 0x2
#define LLC_DACKRSPFINAL 0x4
#define LLC_SENDACKNOWLEDGE(l, cmd, pf) { \
if ((cmd) == LLC_CMD) { \
LLC_SETFLAG((l), DACTION, ((pf) == 0 ? LLC_DACKCMD : LLC_DACKCMDPOLL)); \
LLC_SETFLAG((l), DACTION, ((pf) == 0 ? LLC_DACKRSP : LLC_DACKRSPFINAL)); \
#define LLC_FRMR_W (1<<0)
#define LLC_FRMR_X (1<<1)
#define LLC_FRMR_Y (1<<2)
#define LLC_FRMR_Z (1<<3)
#define LLC_FRMR_V (1<<4)
#define LLC_SETFRMR(l, f, cr, c) { \
if ((f)->llc_control & 0x3) { \
(l)->llcl_frmr_pdu0 = (f)->llc_control; \
(l)->llcl_frmr_pdu1 = 0; \
(l)->llcl_frmr_pdu0 = (f)->llc_control; \
(l)->llcl_frmr_pdu1 = (f)->llc_control_ext; \
LLCCSBITS((l)->llcl_frmr_control, f_vs, (l)->llcl_vs); \
LLCCSBITS((l)->llcl_frmr_control_ext, f_cr, (cr)); \
LLCSBITS((l)->llcl_frmr_control_ext, f_vr, (l)->llcl_vr); \
LLCCSBITS((l)->llcl_frmr_cause, f_wxyzv, (c)); \
* LLCTR_INTERESTING interesting event, we might care to know about
* it, but then again, we might not ...
* LLCTR_SHOULDKNOW we probably should know about this event
* LLCTR_URGENT something has gone utterly wrong ...
#define LLCTR_INTERESTING 1
#define LLCTR_SHOULDKNOW 2
#define LLC_TRACE(lp, l, msg) llc_trace((lp), (l), (msg))
#define LLC_TRACE(lp, l, msg) /* NOOP */
#define LLC_N2_VALUE 15 /* up to 15 retries */
#define LLC_ACK_TIMER 10 /* 5 secs */
#define LLC_P_TIMER 4 /* 2 secs */
#define LLC_BUSY_TIMER 12 /* 6 secs */
#define LLC_REJ_TIMER 12 /* 6 secs */
#define LLC_AGE_TIMER 40 /* 20 secs */
#define LLC_DACTION_TIMER 2 /* 1 secs */
#if defined (KERNEL) && defined(LLC)
extern int llc_ACK_timer
;
extern int llc_REJ_timer
;
extern int llc_BUSY_timer
;
extern int llc_AGE_timer
;
extern int llc_DACTION_timer
;
extern int af_link_rts_init_done
;
#define USES_AF_LINK_RTS { \
if (!af_link_rts_init_done) { \
rn_inithead((void **)&rt_tables[AF_LINK], 32); \
af_link_rts_init_done++; \
extern struct llccb_q llccb_q
;
extern char *frame_names
[];
int sdl_cmp
__P((struct sockaddr_dl
*, struct sockaddr_dl
*));
int sdl_copy
__P((struct sockaddr_dl
*, struct sockaddr_dl
*));
int sdl_swapaddr
__P((struct sockaddr_dl
*, struct sockaddr_dl
*));
int sdl_checkaddrif
__P((struct ifnet
*, struct sockaddr_dl
*));
int sdl_setaddrif
__P((struct ifnet
*, u_char
*, u_char
, u_char
,
int sdl_sethdrif
__P((struct ifnet
*, u_char
*, u_char
, u_char
*, u_char
, u_char
,
struct npaidbentry
*llc_setsapinfo
__P((struct ifnet
*, u_char
, u_char
,
struct npaidbentry
*llc_getsapinfo
__P((u_char
, struct ifnet
*));
struct rtentry
*npaidb_enrich
__P((short, caddr_t
, struct sockaddr_dl
*));
int npaidb_destroy
__P((struct rtentry
*));
short llc_seq2slot
__P((struct llc_linkcb
*, short));
int llc_state_ADM
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_CONN
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_RESET_WAIT
__P((struct llc_linkcb
*, struct llc
*,
int llc_state_RESET_CHECK
__P((struct llc_linkcb
*, struct llc
*,
int llc_state_SETUP
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_RESET
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_D_CONN
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_ERROR
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_NBRAcore
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_NORMAL
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_BUSY
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_REJECT
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_AWAIT
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_AWAIT_BUSY
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_state_AWAIT_REJECT
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_statehandler
__P((struct llc_linkcb
*, struct llc
*, int, int, int));
int llc_init
__P((void));
struct llc_linkcb
*llc_newlink
__P((struct sockaddr_dl
*, struct ifnet
*,
struct rtentry
*, caddr_t
, struct rtentry
*));
int llc_dellink
__P((struct llc_linkcb
*));
int llc_anytimersup
__P((struct llc_linkcb
*));
char * llc_getstatename
__P((struct llc_linkcb
*));
void llc_link_dump
__P((struct llc_linkcb
*, const char *));
void llc_trace
__P((struct llc_linkcb
*, int, const char *));
void llc_resetwindow
__P((struct llc_linkcb
*));
int llc_decode
__P((struct llc
*, struct llc_linkcb
*));
void llc_timer
__P((void));
void llcintr
__P((void));
int llc_input
__P((struct llc_linkcb
*, struct mbuf
*, u_char
));
caddr_t llc_ctlinput
__P((int, struct sockaddr
*, caddr_t
));
int llc_output
__P((struct llc_linkcb
*, struct mbuf
*));
void llc_start
__P((struct llc_linkcb
*));
int llc_send
__P((struct llc_linkcb
*, int, int, int));
int llc_resend
__P((struct llc_linkcb
*, int, int));
int llc_rawsend
__P((struct llc_linkcb
*, struct mbuf
*, struct llc
*, int, int,
int cons_rtrequest
__P((int, struct rtentry
*, struct sockaddr
*));
int x25_llcglue
__P((int, struct sockaddr
*));