sunos4/if_ppp_vdcmd.c

   1 #include <sys/types.h>
   2 #include <sys/errno.h>
   3 #include <sys/conf.h>
   4 #include <sun/vddrv.h>
   5
   6 extern struct streamtab if_pppinfo;
   7
   8 static struct vdldrv vd = {
   9     VDMAGIC_USER,
  10     "if_ppp"
  11 };
  12
  13 static int fmodsw_index = -1;
  14
  15 int
  16 if_ppp_vdcmd(fun, vdp, vdi, vds)
  17     unsigned int fun;
  18     struct vddrv *vdp;
  19     addr_t vdi;
  20     struct vdstat *vds;
  21 {
  22     int n, error;
  23
  24     switch (fun) {
  25     case VDLOAD:
  26         vdp->vdd_vdtab = (struct vdlinkage *) &vd;
  27         if (fmodsw_index >= 0)
  28             return EBUSY;
  29         for (n = 0; n < fmodcnt; ++n)
  30             if (fmodsw[n].f_str == 0)
  31                 break;
  32         if (n >= fmodcnt)
  33             return ENODEV;
  34         strncpy(fmodsw[n].f_name, vd.Drv_name, FMNAMESZ+1);
  35         fmodsw[n].f_str = &if_pppinfo;
  36         fmodsw_index = n;
  37         break;
  38
  39     case VDUNLOAD:
  40         if (fmodsw_index <= 0)
  41             return EINVAL;
  42         error = if_ppp_unload();
  43         if (error != 0)
  44             return error;
  45         fmodsw[fmodsw_index].f_name[0] = 0;
  46         fmodsw[fmodsw_index].f_str = 0;
  47         fmodsw_index = -1;
  48         break;
  49
  50     case VDSTAT:
  51         break;
  52
  53     default:
  54         return EIO;
  55     }
  56     return 0;
  57 }