spinn_net.h

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//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
 
/*
 * Copyright (c) 2009 The University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef SPINN_NET_H
#define SPINN_NET_H
 
#define MAC_HDR_SIZE            14
#define IP_HDR_SIZE             20
#define UDP_HDR_SIZE            8
#define SDP_PAD_SIZE            2
 
#define IP_HDR_OFFSET           MAC_HDR_SIZE
#define IP_DATA_OFFSET          (IP_HDR_OFFSET + IP_HDR_SIZE)
 
#define UDP_HDR_OFFSET          IP_DATA_OFFSET
#define UDP_DATA_OFFSET         (UDP_HDR_OFFSET + UDP_HDR_SIZE)
 
#define ETYPE_IP                0x0800 
#define ETYPE_ARP               0x0806 
 
#define PROT_ICMP               1  
#define PROT_UDP                17 
 
#define ARP_REQ                 1  
#define ARP_REPLY               2  
 
#define ICMP_ECHO_REPLY         0  
#define ICMP_ECHO_REQ           8  
 
typedef struct {
    ushort htype;    
    ushort ptype;    
    uchar hlen;      
    uchar plen;      
    ushort op;       
    uchar sha[6];    
    uchar spa[4];    
    uchar tha[6];    
    uchar tpa[4];    
} arp_pkt_t;
 
typedef struct {
    ushort srce;     
    ushort dest;     
    ushort length;   
    ushort checksum; 
} udp_hdr_t;
 
typedef struct {
    uchar type;      
    uchar code;      
    ushort checksum; 
    ushort ident;    
    ushort seq;      
} icmp_hdr_t;
 
typedef struct mac_hdr_t {
    uchar dest[6]; 
    uchar srce[6]; 
    ushort type;   
} mac_hdr_t;
 
typedef struct {
    uchar ver_len;   
    uchar DS;        
    ushort length;   
    ushort ident;    
    ushort flg_off;  
    uchar TTL;       
    uchar protocol;  
    ushort checksum; 
    uchar srce[4];   
    uchar dest[4];   
} ip_hdr_t;
 
extern const uchar bc_mac[];
extern const uchar zero_mac[];
 
void eth_init(uchar *mac);
 
uint ipsum(uchar *d, uint len, uint sum);
 
void copy_mac(const uchar *f, uchar *t);
 
void copy_ip(const uchar *f, uchar *t);
 
uint cmp_ip(const uchar *a, const uchar *b);
 
void copy_ip_hdr(uchar *dest, uint prot, ip_hdr_t *ip, uint len);
 
void eth_transmit(uchar *buf, uint len, uint type, const uchar *dest);
 
void eth_transmit2(uchar *hdr, uchar *buf, uint hdr_len, uint buf_len);
 
void send_arp_pkt(uchar *buf, const uchar *dest,
                  const uchar *tha, const uchar *tpa, uint type);
 
void arp_lookup(iptag_t *iptag);
 
void arp_pkt(uchar *rx_pkt, uint rx_len, uint tag_table_size);
 
void arp_add(uchar *mac, uchar *ip);
 
void icmp_pkt(uchar *rx_pkt, uint rx_len);
 
void copy_udp(uchar *buf, uint len, uint dest, uint srce);
 
#endif