diff options
Diffstat (limited to 'nuttx/net/uip/uip_arptab.c')
| -rw-r--r-- | nuttx/net/uip/uip_arptab.c | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/nuttx/net/uip/uip_arptab.c b/nuttx/net/uip/uip_arptab.c deleted file mode 100644 index 3dff97070..000000000 --- a/nuttx/net/uip/uip_arptab.c +++ /dev/null @@ -1,257 +0,0 @@ -/**************************************************************************** - * net/uip/uip_arptab.c - * Implementation of the ARP Address Resolution Protocol. - * - * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Based originally on uIP which also has a BSD style license: - * - * Author: Adam Dunkels <adam@dunkels.com> - * Copyright (c) 2001-2003, Adam Dunkels. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote - * products derived from this software without specific prior - * written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS - * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE - * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> -#ifdef CONFIG_NET - -#include <sys/ioctl.h> -#include <stdint.h> -#include <string.h> -#include <debug.h> - -#include <netinet/in.h> - -#include <net/ethernet.h> -#include <nuttx/net/uip/uipopt.h> -#include <nuttx/net/uip/uip-arch.h> -#include <nuttx/net/uip/uip-arp.h> - -#ifdef CONFIG_NET_ARP - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/* The table of known address mappings */ - -static struct arp_entry g_arptable[CONFIG_NET_ARPTAB_SIZE]; -static uint8_t g_arptime; - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: uip_arp_init - * - * Description: - * Initialize the ARP module. This function must be called before any of - * the other ARP functions. - * - ****************************************************************************/ - -void uip_arp_init(void) -{ - int i; - for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i) - { - memset(&g_arptable[i].at_ipaddr, 0, sizeof(in_addr_t)); - } -} - -/**************************************************************************** - * Name: uip_arp_timer - * - * Description: - * This function performs periodic timer processing in the ARP module - * and should be called at regular intervals. The recommended interval - * is 10 seconds between the calls. It is responsible for flushing old - * entries in the ARP table. - * - ****************************************************************************/ - -void uip_arp_timer(void) -{ - struct arp_entry *tabptr; - int i; - - ++g_arptime; - for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i) - { - tabptr = &g_arptable[i]; - if (tabptr->at_ipaddr != 0 && g_arptime - tabptr->at_time >= UIP_ARP_MAXAGE) - { - tabptr->at_ipaddr = 0; - } - } -} - -/**************************************************************************** - * Name: uip_arp_update - * - * Description: - * Add the IP/HW address mapping to the ARP table -OR- change the IP - * address of an existing association. - * - * Input parameters: - * pipaddr - Refers to an IP address uint16_t[2] - * ethaddr - Refers to a HW address uint8_t[IFHWADDRLEN] - * - * Assumptions - * Interrupts are disabled - * - ****************************************************************************/ - -void uip_arp_update(uint16_t *pipaddr, uint8_t *ethaddr) -{ - struct arp_entry *tabptr = NULL; - in_addr_t ipaddr = uip_ip4addr_conv(pipaddr); - int i; - - /* Walk through the ARP mapping table and try to find an entry to - * update. If none is found, the IP -> MAC address mapping is - * inserted in the ARP table. - */ - - for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i) - { - tabptr = &g_arptable[i]; - - /* Only check those entries that are actually in use. */ - - if (tabptr->at_ipaddr != 0) - { - /* Check if the source IP address of the incoming packet matches - * the IP address in this ARP table entry. - */ - - if (uip_ipaddr_cmp(ipaddr, tabptr->at_ipaddr)) - { - /* An old entry found, update this and return. */ - - memcpy(tabptr->at_ethaddr.ether_addr_octet, ethaddr, ETHER_ADDR_LEN); - tabptr->at_time = g_arptime; - return; - } - } - } - - /* If we get here, no existing ARP table entry was found, so we create one. */ - - /* First, we try to find an unused entry in the ARP table. */ - - for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i) - { - tabptr = &g_arptable[i]; - if (tabptr->at_ipaddr == 0) - { - break; - } - } - - /* If no unused entry is found, we try to find the oldest entry and - * throw it away. - */ - - if (i == CONFIG_NET_ARPTAB_SIZE) - { - uint8_t tmpage = 0; - int j = 0; - for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i) - { - tabptr = &g_arptable[i]; - if (g_arptime - tabptr->at_time > tmpage) - { - tmpage = g_arptime - tabptr->at_time; - j = i; - } - } - i = j; - tabptr = &g_arptable[i]; - } - - /* Now, i is the ARP table entry which we will fill with the new - * information. - */ - - tabptr->at_ipaddr = ipaddr; - memcpy(tabptr->at_ethaddr.ether_addr_octet, ethaddr, ETHER_ADDR_LEN); - tabptr->at_time = g_arptime; -} - -/**************************************************************************** - * Name: uip_arp_find - * - * Description: - * Find the ARP entry corresponding to this IP address. - * - * Input parameters: - * ipaddr - Refers to an IP addressin network order - * - * Assumptions - * Interrupts are disabled; Returned value will become unstable when - * interrupts are re-enabled or if any other uIP APIs are called. - * - ****************************************************************************/ - -struct arp_entry *uip_arp_find(in_addr_t ipaddr) -{ - struct arp_entry *tabptr; - int i; - - for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i) - { - tabptr = &g_arptable[i]; - if (uip_ipaddr_cmp(ipaddr, tabptr->at_ipaddr)) - { - return tabptr; - } - } - return NULL; -} - -#endif /* CONFIG_NET_ARP */ -#endif /* CONFIG_NET */ |