/* $NetBSD: tty_conf.c,v 1.33 2001/05/24 10:33:08 kristerw Exp $ */ /*- * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)tty_conf.c 8.5 (Berkeley) 1/9/95 */ #include "opt_compat_freebsd.h" #include "opt_compat_43.h" #include #include #include #include #include #include #include #include #include #include #include "tb.h" #if NTB > 0 int tbopen __P((dev_t dev, struct tty *tp)); int tbclose __P((struct tty *tp, int flags)); int tbread __P((struct tty *tp, struct uio *uio, int flags)); int tbtioctl __P((struct tty *tp, u_long cmd, caddr_t data, int flag, struct proc *p)); int tbinput __P((int c, struct tty *tp)); #endif #include "sl.h" #if NSL > 0 int slopen __P((dev_t dev, struct tty *tp)); int slclose __P((struct tty *tp, int flags)); int sltioctl __P((struct tty *tp, u_long cmd, caddr_t data, int flag, struct proc *p)); int slinput __P((int c, struct tty *tp)); int slstart __P((struct tty *tp)); #endif #include "ppp.h" #if NPPP > 0 int pppopen __P((dev_t dev, struct tty *tp)); int pppclose __P((struct tty *tp, int flags)); int ppptioctl __P((struct tty *tp, u_long cmd, caddr_t data, int flag, struct proc *p)); int pppinput __P((int c, struct tty *tp)); int pppstart __P((struct tty *tp)); int pppread __P((struct tty *tp, struct uio *uio, int flag)); int pppwrite __P((struct tty *tp, struct uio *uio, int flag)); #endif #include "strip.h" #if NSTRIP > 0 int stripopen __P((dev_t dev, struct tty *tp)); int stripclose __P((struct tty *tp, int flags)); int striptioctl __P((struct tty *tp, u_long cmd, caddr_t data, int flag, struct proc *p)); int stripinput __P((int c, struct tty *tp)); int stripstart __P((struct tty *tp)); #endif struct linesw termios_disc = { "termios", 0, ttylopen, ttylclose, ttread, ttwrite, nullioctl, ttyinput, ttstart, ttymodem, ttpoll }; /* 0- termios */ struct linesw defunct_disc = { "defunct", 1, ttynodisc, ttyerrclose, ttyerrio, ttyerrio, nullioctl, ttyerrinput, ttyerrstart, nullmodem, ttyerrpoll }; /* 1- defunct */ #if defined(COMPAT_43) || defined(COMPAT_FREEBSD) struct linesw ntty_disc = { "ntty", 2, ttylopen, ttylclose, ttread, ttwrite, nullioctl, ttyinput, ttstart, ttymodem, ttpoll }; /* 2- old NTTYDISC */ #endif #if NTB > 0 struct linesw table_disc = { "tablet", 3, tbopen, tbclose, tbread, ttyerrio, tbtioctl, tbinput, ttstart, nullmodem, ttyerrpoll }; /* 3- TABLDISC */ #endif #if NSL > 0 struct linesw slip_disc = { "slip", 4, slopen, slclose, ttyerrio, ttyerrio, sltioctl, slinput, slstart, nullmodem, ttyerrpoll }; /* 4- SLIPDISC */ #endif #if NPPP > 0 struct linesw ppp_disc = { "ppp", 5, pppopen, pppclose, pppread, pppwrite, ppptioctl, pppinput, pppstart, ttymodem, ttpoll }; /* 5- PPPDISC */ #endif #if NSTRIP > 0 struct linesw strip_disc = { "strip", 6, stripopen, stripclose, ttyerrio, ttyerrio, striptioctl, stripinput, stripstart, nullmodem, ttyerrpoll }; /* 6- STRIPDISC */ #endif /* * Registered line disciplines. Don't use this * it will go away. */ #define LSWITCHBRK 20 struct linesw **linesw = NULL; int nlinesw = 0; int slinesw = 0; /* * Do nothing specific version of line * discipline specific ioctl command. */ /*ARGSUSED*/ int nullioctl(tp, cmd, data, flags, p) struct tty *tp; u_long cmd; char *data; int flags; struct proc *p; { #ifdef lint tp = tp; data = data; flags = flags; p = p; #endif return (-1); } /* * Register a line discipline, optionally providing a * specific discipline number for compatibility, -1 allocates * a new one. Returns a discipline number, or -1 on * failure. */ int ttyldisc_add(disc, no) struct linesw *disc; int no; { /* You are not allowed to exceed TTLINEDNAMELEN */ if (strlen(disc->l_name) > TTLINEDNAMELEN) return (-1); /* * You are not allowed to specify a line switch * compatibility number greater than 10. */ if (no > 10) return (-1); if (linesw == NULL) panic("adding uninitialized linesw"); #ifdef DEBUG /* * XXX: For the benefit of LKMs */ if (disc->l_poll == NULL) panic("line discipline must now provide l_poll() entry point"); #endif if (no == -1) { /* Hunt for any slot */ for (no = slinesw; no-- > 0;) if (linesw[no] == NULL) break; /* if no == -1 we should realloc linesw, but for now... */ if (no == -1) return (-1); } /* Need a specific slot */ if (linesw[no] != NULL) return (-1); linesw[no] = disc; disc->l_no = no; /* Define size of table */ if (no >= nlinesw) nlinesw = no + 1; return (no); } /* * Remove a line discipline by its name. Returns the * discipline on success or NULL on failure. */ struct linesw * ttyldisc_remove(name) char *name; { struct linesw *disc; int i; if (linesw == NULL) panic("removing uninitialized linesw"); for (i = 0; i < nlinesw; i++) { if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0)) { disc = linesw[i]; linesw[i] = NULL; if (nlinesw == i + 1) { /* Need to fix up array sizing */ while (i-- > 0 && linesw[i] == NULL) continue; nlinesw = i + 1; } return (disc); } } return (NULL); } /* * Look up a line discipline by its name. */ struct linesw * ttyldisc_lookup(name) char *name; { int i; for (i = 0; i < nlinesw; i++) if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0)) return (linesw[i]); return (NULL); } #define TTYLDISCINIT(s, v) \ do { \ if (ttyldisc_add(&(s), (v)) != (v)) \ panic("ttyldisc_init: " __STRING(s)); \ } while (0) /* * Register the basic line disciplines. */ void ttyldisc_init() { /* Only initialize once */ if (linesw) return; slinesw = LSWITCHBRK; linesw = malloc(slinesw * sizeof(struct linesw *), M_TTYS, M_WAITOK); bzero(linesw, slinesw * sizeof(struct linesw *)); TTYLDISCINIT(termios_disc, 0); /* Do we really need this one? */ TTYLDISCINIT(defunct_disc, 1); /* * The following should really be moved to * initialization code for each module. */ #if defined(COMPAT_43) || defined(COMPAT_FREEBSD) TTYLDISCINIT(ntty_disc, 2); #endif #if NTB > 0 TTYLDISCINIT(table_disc, 3); #endif #if NSL > 0 TTYLDISCINIT(slip_disc, 4); #endif #if NPPP > 0 TTYLDISCINIT(ppp_disc, 5); #endif #if NSTRIP > 0 TTYLDISCINIT(strip_disc, 6); #endif }