diff options
Diffstat (limited to 'firmware/zpu/lib/arp_cache.c')
-rw-r--r-- | firmware/zpu/lib/arp_cache.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/firmware/zpu/lib/arp_cache.c b/firmware/zpu/lib/arp_cache.c deleted file mode 100644 index 8e14d8f17..000000000 --- a/firmware/zpu/lib/arp_cache.c +++ /dev/null @@ -1,90 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2009-2011 Ettus Research LLC - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include "arp_cache.h" -#include <stddef.h> - -typedef struct { - struct ip_addr ip; - eth_mac_addr_t mac; -} arp_cache_t; - -#define NENTRIES 8 // power-of-2 - -static size_t nentries; -static size_t victim; -static arp_cache_t cache[NENTRIES]; - -void -arp_cache_init(void) -{ - nentries = 0; - victim = 0; -} - -// returns non-negative index if found, else -1 -static int -arp_cache_lookup(const struct ip_addr *ip) -{ - int i; - for (i = 0; i < nentries; i++) - if (cache[i].ip.addr == ip->addr) - return i; - - return -1; -} - -static int -arp_cache_alloc(void) -{ - if (nentries < NENTRIES) - return nentries++; - - int i = victim; - victim = (victim + 1) % NENTRIES; - return i; -} - -void -arp_cache_update(const struct ip_addr *ip, - const eth_mac_addr_t *mac) -{ - int i = arp_cache_lookup(ip); - if (i < 0){ - i = arp_cache_alloc(); - cache[i].ip = *ip; - cache[i].mac = *mac; - } - else { - cache[i].mac = *mac; - } -} - -bool -arp_cache_lookup_mac(const struct ip_addr *ip, - eth_mac_addr_t *mac) -{ - int i = arp_cache_lookup(ip); - if (i < 0) - return false; - - *mac = cache[i].mac; - return true; -} |