00001 /* 00002 *Copyright (c) 2000-2002 Viola Systems Ltd. 00003 *All rights reserved. 00004 * 00005 *Redistribution and use in source and binary forms, with or without 00006 *modification, are permitted provided that the following conditions 00007 *are met: 00008 * 00009 *1. Redistributions of source code must retain the above copyright 00010 *notice, this list of conditions and the following disclaimer. 00011 * 00012 *2. Redistributions in binary form must reproduce the above copyright 00013 *notice, this list of conditions and the following disclaimer in the 00014 *documentation and/or other materials provided with the distribution. 00015 * 00016 *3. The end-user documentation included with the redistribution, if 00017 *any, must include the following acknowledgment: 00018 * "This product includes software developed by Viola 00019 * Systems (http://www.violasystems.com/)." 00020 * 00021 *Alternately, this acknowledgment may appear in the software itself, 00022 *if and wherever such third-party acknowledgments normally appear. 00023 * 00024 *4. The names "OpenTCP" and "Viola Systems" must not be used to 00025 *endorse or promote products derived from this software without prior 00026 *written permission. For written permission, please contact 00027 *opentcp@opentcp.org. 00028 * 00029 *5. Products derived from this software may not be called "OpenTCP", 00030 *nor may "OpenTCP" appear in their name, without prior written 00031 *permission of the Viola Systems Ltd. 00032 * 00033 *THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED 00034 *WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00035 *MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 00036 *IN NO EVENT SHALL VIOLA SYSTEMS LTD. OR ITS CONTRIBUTORS BE LIABLE 00037 *FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00038 *CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00039 *SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 00040 *BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00041 *WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 00042 *OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 00043 *EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00044 *==================================================================== 00045 * 00046 *OpenTCP is the unified open source TCP/IP stack available on a series 00047 *of 8/16-bit microcontrollers, please see <http://www.opentcp.org>. 00048 * 00049 *For more information on how to network-enable your devices, or how to 00050 *obtain commercial technical support for OpenTCP, please see 00051 *<http://www.violasystems.com/>. 00052 */ 00053 00063 #ifndef INCLUDE_ARP_H 00064 #define INCLUDE_ARP_H 00065 00066 #include <inet/datatypes.h> 00067 #include <inet/system.h> 00068 #include <inet/ethernet.h> 00069 #include <inet/ip.h> 00070 00071 /* User Allowed to modify */ 00072 00073 00074 #define MAXHWALEN 6 00075 #define MAXPRALEN 4 00091 #define ARP_TSIZE 10 00092 00102 #define ARP_TIMEOUT 60 00103 00117 #define ARP_RESEND 2 00118 00126 #define ARP_MAXRETRY 5 00129 /* System constants, don't modify */ 00130 00131 #define AR_HARDWARE 0x0001 /* Ethernet hardware type code */ 00132 #define ARP_ETHCODE 0x0806 /* ARP over Ethernet */ 00133 00134 #define ARP_REQUEST 1 /* ARP Request to resolve address */ 00135 #define ARP_REPLY 2 /* Reply to resolve request */ 00136 00137 #define ARP_MANG_TOUT 1 /* Interval between ARP cache mngmt. */ 00138 00146 struct arp_entry 00147 { 00157 UINT8 state; 00158 00167 UINT8 type; 00168 UINT8 retries; 00172 UINT8 ttl; 00175 UINT8 hwadr[MAXHWALEN]; 00179 UINT32 pradr; 00181 }; 00182 00183 /* Arp Entry States */ 00184 00185 #define ARP_FREE 0 00186 #define ARP_RESERVED 1 00187 #define ARP_PENDING 2 00188 #define ARP_RESOLVED 3 00189 #define ARP_REFRESHING 4 00193 /* Arp Entry Types */ 00194 00195 #define ARP_FIXED_IP 0 00196 #define ARP_TEMP_IP 1 00200 /* ARP Functions */ 00201 void arp_init(void); 00202 struct arp_entry* arpfind(LWORD, struct netif*, UINT8); 00203 INT8 arp_alloc(UINT8); 00204 void arp_send_req(UINT8); 00205 struct arp_entry* arp_find (LWORD , struct netif *, UINT8 ); 00206 void arp_manage(void); 00207 BYTE is_subnet(LWORD, struct netif*); 00208 BYTE process_arp(struct ethernet_frame*); 00209 void arp_send_response(void); 00210 void arp_get_response(void); 00211 void arp_send_request(void); 00212 INT8 arp_add(UINT32, UINT8*, UINT8); 00213 00214 #endif 00215