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Annotation of xinu/sys/dgcntl.c, revision 1.1.1.1

1.1       root        1: /* dgcntl.c - dgcntl */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <network.h>
                      6: 
                      7: /*------------------------------------------------------------------------
                      8:  *  dgcntl  -  control function for datagram pseudo-devices
                      9:  *------------------------------------------------------------------------
                     10:  */
                     11: dgcntl(devptr, func, arg)
                     12: struct devsw   *devptr;
                     13: int    func;
                     14: int    arg;
                     15: {
                     16:        struct  dgblk   *dgptr;
                     17:        int     freebuf();
                     18:        PStype  ps;
                     19:        int     ret;
                     20: 
                     21:        disable(ps);
                     22:        dgptr = (struct dgblk *)devptr->dvioblk;
                     23:        ret = OK;
                     24:        switch (func) {
                     25: 
                     26:                case DG_SETMODE:        /* set mode bits */
                     27:                        dgptr->dg_mode = arg;
                     28:                        break;
                     29: 
                     30:                case DG_CLEAR:          /* clear queued packets */
                     31:                        preset(dgptr->dg_xport, freebuf);
                     32:                        break;
                     33: 
                     34:                default:
                     35:                        ret = SYSERR;
                     36:        }
                     37:        restore(ps);
                     38:        return(ret);
                     39: }

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