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Annotation of qemu/roms/SLOF/clients/net-snk/app/netlib/ipv4.h, revision 1.1.1.1

1.1       root        1: /******************************************************************************
                      2:  * Copyright (c) 2004, 2008 IBM Corporation
                      3:  * All rights reserved.
                      4:  * This program and the accompanying materials
                      5:  * are made available under the terms of the BSD License
                      6:  * which accompanies this distribution, and is available at
                      7:  * http://www.opensource.org/licenses/bsd-license.php
                      8:  *
                      9:  * Contributors:
                     10:  *     IBM Corporation - initial implementation
                     11:  *****************************************************************************/
                     12: 
                     13: 
                     14: #ifndef _IPV4_H_
                     15: #define _IPV4_H_
                     16: 
                     17: #include <types.h>
                     18: 
                     19: #define IPTYPE_ICMP         1
                     20: 
                     21: /** \struct iphdr
                     22:  *  A header for IP-packets.
                     23:  *  For more information see RFC 791.
                     24:  */
                     25: struct iphdr {
                     26:        uint8_t ip_hlv;      /**< Header length and version of the header      */
                     27:        uint8_t ip_tos;      /**< Type of Service                              */
                     28:        uint16_t ip_len;     /**< Length in octets, inlc. this header and data */
                     29:        uint16_t ip_id;      /**< ID is used to aid in assembling framents     */
                     30:        uint16_t ip_off;     /**< Info about fragmentation (control, offset)   */
                     31:        uint8_t ip_ttl;      /**< Time to Live                                 */
                     32:        uint8_t ip_p;        /**< Next level protocol type                     */
                     33:        uint16_t ip_sum;     /**< Header checksum                              */
                     34:        uint32_t ip_src;     /**< Source IP address                            */
                     35:        uint32_t ip_dst;     /**< Destination IP address                       */
                     36: };
                     37: typedef struct iphdr ipv4_hdr_t;
                     38: 
                     39: /* ICMP Error Codes */
                     40: #define ICMP_NET_UNREACHABLE 0
                     41: #define ICMP_HOST_UNREACHABLE 1
                     42: #define ICMP_PROTOCOL_UNREACHABLE 2
                     43: #define ICMP_PORT_UNREACHABLE 3
                     44: #define ICMP_FRAGMENTATION_NEEDED 4
                     45: #define ICMP_SOURCE_ROUTE_FAILED 5
                     46: 
                     47: /** \struct arphdr
                     48:  *  A header for ARP-messages, retains info about HW and proto addresses.
                     49:  *  For more information see RFC 826.
                     50:  */
                     51: struct arphdr {
                     52:        uint16_t hw_type;    /**< HW address space (1 for Ethernet)            */
                     53:        uint16_t proto_type; /**< Protocol address space                       */
                     54:        uint8_t hw_len;      /**< Byte length of each HW address               */
                     55:        uint8_t proto_len;   /**< Byte length of each proto address            */
                     56:        uint16_t opcode;     /**< Identifies is it request (1) or reply (2)    */
                     57:        uint8_t src_mac[6];  /**< HW address of sender of this packet          */
                     58:        uint32_t src_ip;     /**< Proto address of sender of this packet       */
                     59:        uint8_t dest_mac[6]; /**< HW address of target of this packet          */
                     60:        uint32_t dest_ip;    /**< Proto address of target of this packet       */
                     61: } __attribute((packed));
                     62: 
                     63: /*>>>>>>>>>>>>> Initialization of the IPv4 network layer. <<<<<<<<<<<<<*/
                     64: extern void     set_ipv4_address(uint32_t own_ip);
                     65: extern uint32_t get_ipv4_address(void);
                     66: extern void     set_ipv4_multicast(uint32_t multicast_ip);
                     67: extern uint32_t get_ipv4_multicast(void);
                     68: extern void     set_ipv4_router(uint32_t router_ip);
                     69: extern uint32_t get_ipv4_router(void);
                     70: extern void     set_ipv4_netmask(uint32_t subnet_mask);
                     71: extern uint32_t get_ipv4_netmask(void);
                     72: 
                     73: extern int   (*send_ip) (void *, int);
                     74: 
                     75: /* fills ip header */
                     76: extern void fill_iphdr(uint8_t * packet, uint16_t packetsize,
                     77:                        uint8_t ip_proto, uint32_t ip_src, uint32_t ip_dst);
                     78: 
                     79: /* Send a IPv4 packet. Adding the Ethernet-Header and resolving the
                     80:  * MAC address is done transparent in the background if necessary.
                     81:  */
                     82: extern int send_ipv4(void* buffer, int len);
                     83: 
                     84: /* Sends an ICMP Echo request to destination IPv4 address */
                     85: extern void ping_ipv4(uint32_t _ping_dst_ip);
                     86: 
                     87: /* Returns host IPv4 address that we are waiting for a response */
                     88: extern uint32_t pong_ipv4(void);
                     89: 
                     90: /* Handles IPv4-packets that are detected by receive_ether. */
                     91: extern int8_t handle_ipv4(uint8_t * packet, int32_t packetsize);
                     92: 
                     93: /* Handles ARP-packets that are detected by receive_ether. */
                     94: extern int8_t handle_arp(uint8_t * packet, int32_t packetsize);
                     95: 
                     96: #endif

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