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

1.1       root        1: /* udpecho.c - udpecho */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <network.h>
                      6: 
                      7: #define        MAXECHO 600             /* maximum size of echoed datagram      */
                      8: static char    buff[MAXECHO];  /* here because the stack may be small  */
                      9: 
                     10: /*------------------------------------------------------------------------
                     11:  *  udpecho  -  UDP echo server process (runs forever in background)
                     12:  *------------------------------------------------------------------------
                     13:  */
                     14: PROCESS        udpecho()
                     15: {
                     16:        int     dev, len;
                     17: 
                     18:        if ( (dev=open(INTERNET, ANYFPORT, UECHO)) == SYSERR) {
                     19:                printf("udpecho: open fails\n");
                     20:                return(SYSERR);
                     21:        }
                     22:        while ( TRUE ) {
                     23:                len = read(dev, buff, MAXECHO);
                     24:                write(dev, buff, len);
                     25:        }
                     26: }

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