/* udpecho.c - udpecho */ #include <conf.h> #include <kernel.h> #include <network.h> #define MAXECHO 600 /* maximum size of echoed datagram */ static char buff[MAXECHO]; /* here because the stack may be small */ /*------------------------------------------------------------------------ * udpecho - UDP echo server process (runs forever in background) *------------------------------------------------------------------------ */ PROCESS udpecho() { int dev, len; if ( (dev=open(INTERNET, ANYFPORT, UECHO)) == SYSERR) { kprintf("udpecho: open fails\n"); return(SYSERR); } while ( TRUE ) { len = read(dev, buff, MAXECHO); write(dev, buff, len); } }