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Annotation of xinu/sys/sndrarp.c, revision 1.1

1.1     ! root        1: /* sndrarp.c - sndrarp */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <network.h>
        !             6: 
        !             7: /*------------------------------------------------------------------------
        !             8:  *  sndrarp  -  broadcast a RARP packet to obtain my IP address
        !             9:  *------------------------------------------------------------------------
        !            10:  */
        !            11: sndrarp()
        !            12: {
        !            13:        struct  epacket *mkarp();
        !            14:        struct  epacket *packet;
        !            15:        int     i;
        !            16:        int     mypid;
        !            17:        int     resp;
        !            18:        IPaddr  junk; /* needed for argument to mkarp; not ever used */
        !            19:        PStype  ps;
        !            20: 
        !            21:        mypid = getpid();
        !            22:        for (i=0 ; i<AR_RTRY ; i++) {
        !            23:                packet = mkarp(EP_RARP, AR_RREQ, junk, junk);
        !            24:                if ( ((int)packet) == SYSERR)
        !            25:                        break;
        !            26:                disable(ps);
        !            27:                Arp.rarppid = mypid;
        !            28:                recvclr();
        !            29:                write(ETHER, packet, EMINPAK);
        !            30:                resp = recvtim(AR_TIME);
        !            31:                restore(ps);
        !            32:                if (resp != TIMEOUT)
        !            33:                        return(OK);
        !            34:        }
        !            35:        panic("No response to RARP");
        !            36:        return(SYSERR);
        !            37: }

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