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When all entries are 0 due to the whole table changing since the last arp tick (past 10 seconds) there's no oldest entry and the new entry does not get a spot.Fix this (from Ed Sutter)

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jani 2003-01-18 16:05:24 +00:00
parent 2154ac3ecb
commit 39edc69514
1 changed files with 5 additions and 2 deletions
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7
src/netif/etharp.c
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@ -3,6 +3,9 @@
* Address Resolution Protocol module for IP over Ethernet * Address Resolution Protocol module for IP over Ethernet
* *
* $Log: etharp.c,v $ * $Log: etharp.c,v $
* Revision 1.23 2003/01/18 16:05:24 jani
* When all entries are 0 due to the whole table changing since the last arp tick (past 10 seconds) there's no oldest entry and the new entry does not get a spot.Fix this (from Ed Sutter)
*
* Revision 1.22 2003/01/13 09:38:21 jani * Revision 1.22 2003/01/13 09:38:21 jani
* remove global ctime.Each entry's ctime is now absolute.This avoids wrapping and also solves naming clash reported on the list * remove global ctime.Each entry's ctime is now absolute.This avoids wrapping and also solves naming clash reported on the list
* *
@ -220,14 +223,14 @@ find_arp_entry(void)
} }
/* If no unused entry is found, we try to find the oldest entry and /* If no unused entry is found, we try to find the oldest entry and
throw it away. */ throw it away. If all entries are new and have 0 ctime drop one */
if(i == ARP_TABLE_SIZE) { if(i == ARP_TABLE_SIZE) {
maxtime = 0; maxtime = 0;
j = ARP_TABLE_SIZE; j = ARP_TABLE_SIZE;
for(i = 0; i < ARP_TABLE_SIZE; ++i) { for(i = 0; i < ARP_TABLE_SIZE; ++i) {
/* remember entry with oldest stable entry in j*/ /* remember entry with oldest stable entry in j*/
if((arp_table[i].state == ETHARP_STATE_STABLE) && if((arp_table[i].state == ETHARP_STATE_STABLE) &&
(arp_table[i].ctime > maxtime)) { (arp_table[i].ctime >= maxtime)) {
maxtime = arp_table[i].ctime; maxtime = arp_table[i].ctime;
j = i; j = i;
} }