lib/slip_ac.c

   1 /*
   2  * lib/slip_ac.c      This file contains the activation for the
   3  *                      SLIP line disciplines, called from activate_ld().
   4  *
   5  * Version:     $Id: slip_ac.c,v 1.3 1998/11/15 20:12:20 freitag Exp $
   6  *
   7  * Author:      Bernd 'eckes' Eckenfels
   8  *              Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
   9  *              Copyright 1993 MicroWalt Corporation
  10  *
  11  *              Modified by Alan Cox, May 94 to cover NET-3
  12  *
  13  *              This program is free software; you can redistribute it
  14  *              and/or  modify it under  the terms of  the GNU General
  15  *              Public  License as  published  by  the  Free  Software
  16  *              Foundation;  either  version 2 of the License, or  (at
  17  *              your option) any later version.
  18  */
  19 #include "config.h"
  20
  21 #if HAVE_HWSLIP
  22
  23 #include <sys/types.h>
  24 #include <sys/ioctl.h>
  25 #include <sys/socket.h>
  26 #include <net/if_arp.h>
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <ctype.h>
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <string.h>
  33 #include <termios.h>
  34 #include <unistd.h>
  35 #include "net-support.h"
  36 #include "pathnames.h"
  37
  38
  39 /* Set the line discipline of a terminal line. */
  40 static int SLIP_set_disc(int fd, int disc)
  41 {
  42     if (ioctl(fd, TIOCSETD, &disc) < 0) {
  43         fprintf(stderr, "SLIP_set_disc(%d): %s\n", disc, strerror(errno));
  44         return (-errno);
  45     }
  46     return (0);
  47 }
  48
  49
  50 /* Set the encapsulation type of a terminal line. */
  51 static int SLIP_set_encap(int fd, int encap)
  52 {
  53     if (ioctl(fd, SIOCSIFENCAP, &encap) < 0) {
  54         fprintf(stderr, "SLIP_set_encap(%d): %s\n", encap, strerror(errno));
  55         return (-errno);
  56     }
  57     return (0);
  58 }
  59
  60
  61 /* Start the SLIP encapsulation on the file descriptor. */
  62 int SLIP_activate(int fd)
  63 {
  64     if (SLIP_set_disc(fd, N_SLIP) < 0)
  65         return (-1);
  66     if (SLIP_set_encap(fd, 0) < 0)
  67         return (-1);
  68     return (0);
  69 }
  70
  71
  72 /* Start the VJ-SLIP encapsulation on the file descriptor. */
  73 int CSLIP_activate(int fd)
  74 {
  75     if (SLIP_set_disc(fd, N_SLIP) < 0)
  76         return (-1);
  77     if (SLIP_set_encap(fd, 1) < 0)
  78         return (-1);
  79     return (0);
  80 }
  81
  82
  83 /* Start the SLIP-6 encapsulation on the file descriptor. */
  84 int SLIP6_activate(int fd)
  85 {
  86     if (SLIP_set_disc(fd, N_SLIP) < 0)
  87         return (-1);
  88     if (SLIP_set_encap(fd, 2) < 0)
  89         return (-1);
  90     return (0);
  91 }
  92
  93
  94 /* Start the VJ-SLIP-6 encapsulation on the file descriptor. */
  95 int CSLIP6_activate(int fd)
  96 {
  97     if (SLIP_set_disc(fd, N_SLIP) < 0)
  98         return (-1);
  99     if (SLIP_set_encap(fd, 3) < 0)
 100         return (-1);
 101     return (0);
 102 }
 103
 104
 105 /* Start adaptive encapsulation on the file descriptor. */
 106 int ADAPTIVE_activate(int fd)
 107 {
 108     if (SLIP_set_disc(fd, N_SLIP) < 0)
 109         return (-1);
 110     if (SLIP_set_encap(fd, 8) < 0)
 111         return (-1);
 112     return (0);
 113 }
 114 #endif                          /* HAVE_HWSLIP */