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authorpatacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679>2008-12-12 18:57:05 +0000
committerpatacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679>2008-12-12 18:57:05 +0000
commit2233af5693b33af2d82c74d9e27a876b46ae04b3 (patch)
treede033b7717f4b807744e7fb47453a1dc6e93b112 /nuttx/net/uip/uip-arp.c
parent8e5297308e4d9469f9f88c654969eb18cb902f41 (diff)
Name changes for ZDS archiver
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@1453 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'nuttx/net/uip/uip-arp.c')
-rw-r--r--nuttx/net/uip/uip-arp.c516
1 files changed, 0 insertions, 516 deletions
diff --git a/nuttx/net/uip/uip-arp.c b/nuttx/net/uip/uip-arp.c
deleted file mode 100644
index 00826ec465..0000000000
--- a/nuttx/net/uip/uip-arp.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/****************************************************************************
- * net/uip/uip-arp.c
- * Implementation of the ARP Address Resolution Protocol.
- *
- * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
- *
- * Based 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.
- *
- ****************************************************************************/
-
-/* The Address Resolution Protocol ARP is used for mapping between IP
- * addresses and link level addresses such as the Ethernet MAC
- * addresses. ARP uses broadcast queries to ask for the link level
- * address of a known IP address and the host which is configured with
- * the IP address for which the query was meant, will respond with its
- * link level address.
- *
- * Note: This ARP implementation only supports Ethernet.
- */
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-#ifdef CONFIG_NET
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-
-#include <string.h>
-#include <debug.h>
-
-#include <netinet/in.h>
-#include <net/ethernet.h>
-#include <net/uip/uip-arch.h>
-#include <net/uip/uip-arp.h>
-
-/****************************************************************************
- * Definitions
- ****************************************************************************/
-
-#define ARP_REQUEST 1
-#define ARP_REPLY 2
-
-#define ARP_HWTYPE_ETH 1
-
-#define ETHBUF ((struct uip_eth_hdr *)&dev->d_buf[0])
-#define ARPBUF ((struct arp_hdr *)&dev->d_buf[UIP_LLH_LEN])
-#define IPBUF ((struct ethip_hdr *)&dev->d_buf[UIP_LLH_LEN])
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-/* ARP header -- Size 28 bytes */
-
-struct arp_hdr
-{
- uint16 ah_hwtype; /* 16-bit Hardware type (Ethernet=0x001) */
- uint16 ah_protocol; /* 16-bit Protocoal type (IP=0x0800 */
- uint8 ah_hwlen; /* 8-bit Hardware address size (6) */
- uint8 ah_protolen; /* 8-bit Procotol address size (4) */
- uint16 ah_opcode; /* 16-bit Operation */
- uint8 ah_shwaddr[6]; /* 48-bit Sender hardware address */
- uint16 ah_sipaddr[2]; /* 32-bit Sender IP adress */
- uint8 ah_dhwaddr[6]; /* 48-bit Target hardware address */
- uint16 ah_dipaddr[2]; /* 32-bit Target IP address */
-};
-
-/* IP header -- Size 20 or 24 bytes */
-
-struct ethip_hdr
-{
- uint8 eh_vhl; /* 8-bit Version (4) and header length (5 or 6) */
- uint8 eh_tos; /* 8-bit Type of service (e.g., 6=TCP) */
- uint8 eh_len[2]; /* 16-bit Total length */
- uint8 eh_ipid[2]; /* 16-bit Identification */
- uint8 eh_ipoffset[2]; /* 16-bit IP flags + fragment offset */
- uint8 eh_ttl; /* 8-bit Time to Live */
- uint8 eh_proto; /* 8-bit Protocol */
- uint16 eh_ipchksum; /* 16-bit Header checksum */
- uint16 eh_srcipaddr[2]; /* 32-bit Source IP address */
- uint16 eh_destipaddr[2]; /* 32-bit Destination IP address */
- uint16 eh_ipoption[2]; /* (optional) */
-};
-
-struct arp_entry
-{
- in_addr_t at_ipaddr;
- struct ether_addr at_ethaddr;
- uint8 at_time;
-};
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/* Support for broadcast address */
-
-static const struct ether_addr g_broadcast_ethaddr =
- {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}};
-static const uint16 g_broadcast_ipaddr[2] = {0xffff, 0xffff};
-
-/* Support for IGMP multicast addresses.
- *
- * Well-known ethernet multicast address:
- *
- * ADDRESS TYPE USAGE
- * 01-00-0c-cc-cc-cc 0x0802 CDP (Cisco Discovery Protocol), VTP (Virtual Trunking Protocol)
- * 01-00-0c-cc-cc-cd 0x0802 Cisco Shared Spanning Tree Protocol Address
- * 01-80-c2-00-00-00 0x0802 Spanning Tree Protocol (for bridges) IEEE 802.1D
- * 01-80-c2-00-00-02 0x0809 Ethernet OAM Protocol IEEE 802.3ah
- * 01-00-5e-xx-xx-xx 0x0800 IPv4 IGMP Multicast Address
- * 33-33-00-00-00-00 0x86DD IPv6 Neighbor Discovery
- * 33-33-xx-xx-xx-xx 0x86DD IPv6 Multicast Address (RFC3307)
- *
- * The following is the first three octects of the IGMP address:
- */
-
-#if defined(CONFIG_NET_MULTICAST) && !defined(CONFIG_NET_IPv6)
-static const ubyte g_multicast_ethaddr[3] = {0x01, 0x00, 0x5e};
-#endif
-
-/* The table of known address mappings */
-
-static struct arp_entry g_arptable[CONFIG_NET_ARPTAB_SIZE];
-static uint8 g_arptime;
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-#if defined(CONFIG_NET_DUMPARP) && defined(CONFIG_DEBUG)
-static void uip_arp_dump(struct arp_hdr *arp)
-{
- ndbg(" HW type: %04x Protocol: %04x\n",
- arp->ah_hwtype, arp->ah_protocol);\
- ndbg(" HW len: %02x Proto len: %02x Operation: %04x\n",
- arp->ah_hwlen, arp->ah_protolen, arp->ah_opcode);
- ndbg(" Sender MAC: %02x:%02x:%02x:%02x:%02x:%02x IP: %d.%d.%d.%d\n",
- arp->ah_shwaddr[0], arp->ah_shwaddr[1], arp->ah_shwaddr[2],
- arp->ah_shwaddr[3], arp->ah_shwaddr[4], arp->ah_shwaddr[5],
- arp->ah_sipaddr[0] & 0xff, arp->ah_sipaddr[0] >> 8,
- arp->ah_sipaddr[1] & 0xff, arp->ah_sipaddr[1] >> 8);
- ndbg(" Dest MAC: %02x:%02x:%02x:%02x:%02x:%02x IP: %d.%d.%d.%d\n",
- arp->ah_dhwaddr[0], arp->ah_dhwaddr[1], arp->ah_dhwaddr[2],
- arp->ah_dhwaddr[3], arp->ah_dhwaddr[4], arp->ah_dhwaddr[5],
- arp->ah_dipaddr[0] & 0xff, arp->ah_dipaddr[0] >> 8,
- arp->ah_dipaddr[1] & 0xff, arp->ah_dipaddr[1] >> 8);
-}
-#else
-# define uip_arp_dump(arp)
-#endif
-
-static void uip_arp_update(uint16 *pipaddr, uint8 *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 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;
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/* Initialize the ARP module. */
-
-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));
- }
-}
-
-/* Periodic ARP processing function.
- *
- * 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.
- */
-
-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;
- }
- }
-}
-
-/* ARP processing for incoming ARP packets.
- *
- * This function should be called by the device driver when an ARP
- * packet has been received. The function will act differently
- * depending on the ARP packet type: if it is a reply for a request
- * that we previously sent out, the ARP cache will be filled in with
- * the values from the ARP reply. If the incoming ARP packet is an ARP
- * request for our IP address, an ARP reply packet is created and put
- * into the d_buf[] buffer.
- *
- * When the function returns, the value of the field d_len
- * indicates whether the device driver should send out a packet or
- * not. If d_len is zero, no packet should be sent. If d_len is
- * non-zero, it contains the length of the outbound packet that is
- * present in the d_buf[] buffer.
- *
- * This function expects an ARP packet with a prepended Ethernet
- * header in the d_buf[] buffer, and the length of the packet in the
- * global variable d_len.
- */
-
-void uip_arp_arpin(struct uip_driver_s *dev)
-{
- in_addr_t ipaddr;
-
- if (dev->d_len < (sizeof(struct arp_hdr) + UIP_LLH_LEN))
- {
- dev->d_len = 0;
- return;
- }
- dev->d_len = 0;
-
- ipaddr = uip_ip4addr_conv(ARPBUF->ah_dipaddr);
- switch(ARPBUF->ah_opcode)
- {
- case HTONS(ARP_REQUEST):
- /* ARP request. If it asked for our address, we send out a reply. */
-
- if (uip_ipaddr_cmp(ipaddr, dev->d_ipaddr))
- {
- /* First, we register the one who made the request in our ARP
- * table, since it is likely that we will do more communication
- * with this host in the future.
- */
-
- uip_arp_update(ARPBUF->ah_sipaddr, ARPBUF->ah_shwaddr);
-
- ARPBUF->ah_opcode = HTONS(ARP_REPLY);
- memcpy(ARPBUF->ah_dhwaddr, ARPBUF->ah_shwaddr, ETHER_ADDR_LEN);
- memcpy(ARPBUF->ah_shwaddr, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
- memcpy(ETHBUF->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
- memcpy(ETHBUF->dest, ARPBUF->ah_dhwaddr, ETHER_ADDR_LEN);
-
- ARPBUF->ah_dipaddr[0] = ARPBUF->ah_sipaddr[0];
- ARPBUF->ah_dipaddr[1] = ARPBUF->ah_sipaddr[1];
- uiphdr_ipaddr_copy(ARPBUF->ah_sipaddr, &dev->d_ipaddr);
- uip_arp_dump(ARPBUF);
-
- ETHBUF->type = HTONS(UIP_ETHTYPE_ARP);
- dev->d_len = sizeof(struct arp_hdr) + UIP_LLH_LEN;
- }
- break;
-
- case HTONS(ARP_REPLY):
- /* ARP reply. We insert or update the ARP table if it was meant
- * for us.
- */
-
- if (uip_ipaddr_cmp(ipaddr, dev->d_ipaddr))
- {
- uip_arp_update(ARPBUF->ah_sipaddr, ARPBUF->ah_shwaddr);
- }
- break;
- }
-}
-
-/* Prepend Ethernet header to an outbound IP packet and see if we need
- * to send out an ARP request.
- *
- * This function should be called before sending out an IP packet. The
- * function checks the destination IP address of the IP packet to see
- * what Ethernet MAC address that should be used as a destination MAC
- * address on the Ethernet.
- *
- * If the destination IP address is in the local network (determined
- * by logical ANDing of netmask and our IP address), the function
- * checks the ARP cache to see if an entry for the destination IP
- * address is found. If so, an Ethernet header is prepended and the
- * function returns. If no ARP cache entry is found for the
- * destination IP address, the packet in the d_buf[] is replaced by
- * an ARP request packet for the IP address. The IP packet is dropped
- * and it is assumed that they higher level protocols (e.g., TCP)
- * eventually will retransmit the dropped packet.
- *
- * If the destination IP address is not on the local network, the IP
- * address of the default router is used instead.
- *
- * When the function returns, a packet is present in the d_buf[]
- * buffer, and the length of the packet is in the field d_len.
- */
-
-void uip_arp_out(struct uip_driver_s *dev)
-{
- struct arp_entry *tabptr = NULL;
- in_addr_t ipaddr;
- in_addr_t destipaddr;
- int i;
-
- /* Find the destination IP address in the ARP table and construct
- * the Ethernet header. If the destination IP addres isn't on the
- * local network, we use the default router's IP address instead.
- *
- * If not ARP table entry is found, we overwrite the original IP
- * packet with an ARP request for the IP address.
- */
-
- /* First check if destination is a local broadcast. */
-
- if (uiphdr_ipaddr_cmp(IPBUF->eh_destipaddr, g_broadcast_ipaddr))
- {
- memcpy(ETHBUF->dest, g_broadcast_ethaddr.ether_addr_octet, ETHER_ADDR_LEN);
- }
-#if defined(CONFIG_NET_MULTICAST) && !defined(CONFIG_NET_IPv6)
- /* Check if the destination address is a multicast address
- *
- * - IPv4: multicast addresses lie in the class D group -- The address range
- * 224.0.0.0 to 239.255.255.255 (224.0.0.0/4)
- *
- * - IPv6 multicast addresses are have the high-order octet of the
- * addresses=0xff (ff00::/8.)
- */
-
- else if (IPBUF->eh_destipaddr[0] >= HTONS(0xe000) &&
- IPBUF->eh_destipaddr[0] <= HTONS(0xefff))
- {
- /* Build the well-known IPv4 IGMP ethernet address. The first
- * three bytes are fixed; the final three variable come from the
- * last three bytes of the IP address.
- */
-
- const ubyte *ip = ((ubyte*)IPBUF->eh_destipaddr) + 1;
- memcpy(ETHBUF->dest, g_multicast_ethaddr, 3);
- memcpy(&ETHBUF->dest[3], ip, 3);
- }
-#endif
- else
- {
- /* Check if the destination address is on the local network. */
-
- destipaddr = uip_ip4addr_conv(IPBUF->eh_destipaddr);
- if (!uip_ipaddr_maskcmp(destipaddr, dev->d_ipaddr, dev->d_netmask))
- {
- /* Destination address was not on the local network, so we need to
- * use the default router's IP address instead of the destination
- * address when determining the MAC address.
- */
-
- uip_ipaddr_copy(ipaddr, dev->d_draddr);
- }
- else
- {
- /* Else, we use the destination IP address. */
-
- uip_ipaddr_copy(ipaddr, destipaddr);
- }
-
- /* Check if we already have this destination address in the ARP table */
-
- for (i = 0; i < CONFIG_NET_ARPTAB_SIZE; ++i)
- {
- tabptr = &g_arptable[i];
- if (uip_ipaddr_cmp(ipaddr, tabptr->at_ipaddr))
- {
- break;
- }
- }
-
- if (i == CONFIG_NET_ARPTAB_SIZE)
- {
- /* The destination address was not in our ARP table, so we
- * overwrite the IP packet with an ARP request.
- */
-
- memset(ETHBUF->dest, 0xff, ETHER_ADDR_LEN);
- memset(ARPBUF->ah_dhwaddr, 0x00, ETHER_ADDR_LEN);
- memcpy(ETHBUF->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
- memcpy(ARPBUF->ah_shwaddr, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
-
- uiphdr_ipaddr_copy(ARPBUF->ah_dipaddr, &ipaddr);
- uiphdr_ipaddr_copy(ARPBUF->ah_sipaddr, &dev->d_ipaddr);
-
- ARPBUF->ah_opcode = HTONS(ARP_REQUEST);
- ARPBUF->ah_hwtype = HTONS(ARP_HWTYPE_ETH);
- ARPBUF->ah_protocol = HTONS(UIP_ETHTYPE_IP);
- ARPBUF->ah_hwlen = ETHER_ADDR_LEN;
- ARPBUF->ah_protolen = 4;
- uip_arp_dump(ARPBUF);
-
- ETHBUF->type = HTONS(UIP_ETHTYPE_ARP);
- dev->d_len = sizeof(struct arp_hdr) + UIP_LLH_LEN;
- return;
- }
-
- /* Build an ethernet header. */
-
- memcpy(ETHBUF->dest, tabptr->at_ethaddr.ether_addr_octet, ETHER_ADDR_LEN);
- }
-
- /* Finish populating the ethernet header */
-
- memcpy(ETHBUF->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
- ETHBUF->type = HTONS(UIP_ETHTYPE_IP);
- dev->d_len += UIP_LLH_LEN;
-}
-#endif /* CONFIG_NET */