?? arpalloc.c,v
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head 1.1;access;symbols;locks dls:1.1; strict;comment @ * @;1.1date 97.09.21.19.22.42; author dls; state Dist;branches;next ;desc@@1.1log@Initial revision@text@/* arpalloc.c - arpalloc */#include <conf.h>#include <kernel.h>#include <proc.h>#include <network.h>void arpdq();/*------------------------------------------------------------------------ * arpalloc - allocate an entry in the ARP table * N.B. Assumes interrupts DISABLED *------------------------------------------------------------------------ */struct arpentry *arpalloc(){ static int aenext = 0; struct arpentry *pae; int i; for (i=0; i<ARP_TSIZE; ++i) { if (arptable[aenext].ae_state == AS_FREE) break; aenext = (aenext + 1) % ARP_TSIZE; } pae = & arptable[aenext]; aenext = (aenext + 1) % ARP_TSIZE; if (pae->ae_state == AS_PENDING && pae->ae_queue >= 0) arpdq(pae); pae->ae_state = AS_PENDING; return pae;}@
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