rfsndmsg.c

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/* rfsndmsg.c - rfsndmsg */

#include <xinu.h>

/*------------------------------------------------------------------------
 * rfsndmsg  -  Create and send a message that only has header fields
 *------------------------------------------------------------------------
 */
status  rfsndmsg (
     uint16 type,           /* Message type         */
     char   *name           /* Null-terminated file name    */
    )
{
    struct  rf_msg_hdr  req;    /* Request message to send  */
    struct  rf_msg_hdr resp;    /* Buffer for response      */
    int32   retval;         /* Return value         */
    char    *to;            /* Used during name copy    */

    /* Form a request */

    req.rf_type = htons(type);
    req.rf_status = htons(0);
    req.rf_seq = 0;         /* Rfscomm will set sequence    */
    to = req.rf_name;
    while ( (*to++ = *name++) ) {   /* Copy name to request     */
        ;
    }

    /* Send message and receive response */

    retval = rfscomm(&req,  sizeof(struct rf_msg_hdr),
             &resp, sizeof(struct rf_msg_hdr) );

    /* Check response */

    if (retval == SYSERR) {
        return SYSERR;
    } else if (retval == TIMEOUT) {
        kprintf("Timeout during remote file server access\n");
        return SYSERR;
    } else if (ntohl(resp.rf_status) != 0) {
        return SYSERR;
    }

    return OK;
}