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