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[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [include/] [net.h] - Rev 613
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/* * LiMon Monitor (LiMon) - Network. * * Copyright 1994 - 2000 Neil Russell. * (See License) * * * History * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added */ #ifndef __NET_H__ #define __NET_H__ // TFTP running checksum defined here... tftp.h not in common include/ path extern unsigned long TFTP_CHKSUM; /* * The number of receive packet buffers, and the required packet buffer * alignment in memory. * */ #define PKTBUFSRX 4 #define PKTALIGN 32 /****** from cpu_arch.h ************/ /* Byte swapping stuff (not needed on PPC). */ #define SWAP16(x) (x) #define SWAP16c(x) (x) #define SWAP32(x) (x) /****** end from cpu_arch.h **************/ typedef unsigned long IPaddr_t; /* * The current receive packet handler. Called with a pointer to the * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP). * All other packets are dealt with without calling the handler. */ typedef void rxhand_f(unsigned char *, unsigned, unsigned, unsigned); /* * A timeout handler. Called after time interval has expired. */ typedef void thand_f(void); #ifdef CONFIG_NET_MULTI #define NAMESIZE 16 enum eth_state_t { ETH_STATE_INIT, ETH_STATE_PASSIVE, ETH_STATE_ACTIVE }; struct eth_device { char name[NAMESIZE]; unsigned char enetaddr[6]; int iobase; int state; int (*init) (struct eth_device*, bd_t*); int (*send) (struct eth_device*, volatile void* pachet, int length); int (*recv) (struct eth_device*); void (*halt) (struct eth_device*); struct eth_device *next; void *priv; }; extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */ extern int eth_register(struct eth_device* dev);/* Register network device */ extern void eth_try_another(void); /* Change the device */ #endif /**********************************************************************/ /* * Protocol headers. */ /* * Ethernet header */ typedef struct { unsigned char et_dest[6]; /* Destination node */ unsigned char et_src[6]; /* Source node */ unsigned short et_protlen; /* Protocol or length */ unsigned char et_dsap; /* 802 DSAP */ unsigned char et_ssap; /* 802 SSAP */ unsigned char et_ctl; /* 802 control */ unsigned char et_snap1; /* SNAP */ unsigned char et_snap2; unsigned char et_snap3; unsigned short et_prot; /* 802 protocol */ } Ethernet_t; #define ETHER_HDR_SIZE 14 /* Ethernet header size */ #define E802_HDR_SIZE 22 /* 802 ethernet header size */ #define PROT_IP 0x0800 /* IP protocol */ #define PROT_ARP 0x0806 /* IP ARP protocol */ #define PROT_RARP 0x8035 /* IP ARP protocol */ #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ #define IPPROTO_UDP 17 /* User Datagram Protocol */ /* * Internet Protocol (IP) header. */ typedef struct { unsigned char ip_hl_v; /* header length and version */ unsigned char ip_tos; /* type of service */ unsigned short ip_len; /* total length */ unsigned short ip_id; /* identification */ unsigned short ip_off; /* fragment offset field */ unsigned char ip_ttl; /* time to live */ unsigned char ip_p; /* protocol */ unsigned short ip_sum; /* checksum */ IPaddr_t ip_src; /* Source IP address */ IPaddr_t ip_dst; /* Destination IP address */ unsigned short udp_src; /* UDP source port */ unsigned short udp_dst; /* UDP destination port */ unsigned short udp_len; /* Length of UDP packet */ unsigned short udp_xsum; /* Checksum */ } IP_t; #define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8) #define IP_HDR_SIZE (sizeof (IP_t)) /* * Address Resolution Protocol (ARP) header. */ typedef struct { unsigned short ar_hrd; /* Format of hardware address*/ # define ARP_ETHER 1 /* Ethernet hardware address*/ unsigned short ar_pro; /* Format of protocol address*/ unsigned char ar_hln; /* Length of hardware address*/ unsigned char ar_pln; /* Length of protocol address*/ unsigned short ar_op; /* Operation */ # define ARPOP_REQUEST 1 /* Request to resolve address */ # define ARPOP_REPLY 2 /* Response to previous request */ # define RARPOP_REQUEST 3 /* Request to resolve address */ # define RARPOP_REPLY 4 /* Response to previous request */ /* * The remaining fields are variable in size, according to * the sizes above, and are defined as appropriate for * specific hardware/protocol combinations. */ unsigned char ar_data[0]; #if 0 unsigned char ar_sha[]; /* Sender hardware address*/ unsigned char ar_spa[]; /* Sender protocol address*/ unsigned char ar_tha[]; /* Target hardware address*/ unsigned char ar_tpa[]; /* Target protocol address*/ #endif /* 0 */ } ARP_t; #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ /* * ICMP stuff (just enough to handle (host) redirect messages) */ #define ICMP_REDIRECT 5 /* Redirect (change route) */ /* Codes for REDIRECT. */ #define ICMP_REDIR_NET 0 /* Redirect Net */ #define ICMP_REDIR_HOST 1 /* Redirect Host */ typedef struct icmphdr { unsigned char type; unsigned char code; unsigned short checksum; union { struct { unsigned short id; unsigned short sequence; } echo; unsigned long gateway; struct { unsigned short __unused; unsigned short mtu; } frag; } un; } ICMP_t; /* * Maximum packet size; used to allocate packet storage. * TFTP packets can be 524 bytes + IP header + ethernet header. * Lets be conservative, and go for 38 * 16. (Must also be * a multiple of 32 bytes). */ /* * AS.HARNOIS : Better to set PKTSIZE to maximum size because * traffic type is not always controlled * maximum packet size = 1518 * maximum packet size and multiple of 32 bytes = 1536 */ #define PKTSIZE 1518 #define PKTSIZE_ALIGN 1536 /*#define PKTSIZE 608*/ /* * Maximum receive ring size; that is, the number of packets * we can buffer before overflow happens. Basically, this just * needs to be enough to prevent a packet being discarded while * we are processing the previous one. */ #define RINGSZ 4 #define RINGSZ_LOG2 2 /**********************************************************************/ /* * Globals. */ /* net.c */ /** BOOTP EXTENTIONS **/ extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */ extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/ extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/ extern char NetOurNISDomain[32]; /* Our NIS domain */ extern char NetOurHostName[32]; /* Our hostname */ extern char NetOurRootPath[64]; /* Our root path */ extern unsigned short NetBootFileSize; /* Our boot file size in blocks */ /** END OF BOOTP EXTENTIONS **/ extern unsigned long NetBootFileXferSize; /* size of bootfile in bytes */ extern unsigned char NetOurEther[6]; /* Our ethernet address */ extern unsigned char NetServerEther[6]; /* Boot server enet address */ extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ extern volatile unsigned char * NetTxPacket; /* THE transmit packet */ extern volatile unsigned char * NetRxPackets[PKTBUFSRX];/* Receive packets */ extern volatile unsigned char * NetRxPkt; /* Current receive packet */ extern int NetRxPktLen; /* Current rx packet length */ extern unsigned NetIPID; /* IP ID (counting) */ extern unsigned char NetBcastAddr[6]; /* Ethernet boardcast address */ extern int NetState; /* Network loop state */ #define NETLOOP_CONTINUE 1 #define NETLOOP_RESTART 2 #define NETLOOP_SUCCESS 3 #define NETLOOP_FAIL 4 typedef enum { BOOTP, RARP, ARP, TFTP, DHCP } proto_t; /* from net/net.c */ extern char BootFile[128]; /* Boot File name */ /* Initialize the network adapter */ extern int NetLoop(proto_t protocol); /* Shutdown adapters and cleanup */ extern void NetStop(void); /* Load failed. Start again. */ extern void NetStartAgain(void); /* Copy ethernet address */ extern void NetCopyEther(volatile unsigned char *, unsigned char *); /* Set ethernet header */ extern void NetSetEther(volatile unsigned char *, unsigned char *, unsigned long); /* Set IP header */ extern void NetSetIP(volatile unsigned char *, IPaddr_t, int, int, int); /* Checksum */ extern int NetCksumOk(unsigned char *, int); /* Return true if cksum OK */ extern unsigned NetCksum(unsigned char *, int); /* Calculate the checksum */ /* Set callbacks */ extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */ extern void NetSetTimeout(int, thand_f *); /* Set timeout handler */ /* Transmit "NetTxPacket" */ extern void NetSendPacket(volatile unsigned char *, int); /* Processes a received packet */ extern void NetReceive(volatile unsigned char *, int); /* Print an IP address on the console */ extern void print_IPaddr (IPaddr_t); /* Convert an IP address to a string */ extern void ip_to_string (IPaddr_t x, char *s); /* read an IP address from a environment variable */ extern IPaddr_t getenv_IPaddr (char *); /* copy a filename (allow for "..." notation, limit length) */ extern void copy_filename (unsigned char *dst, unsigned char *src, int size); /* converts IP from unsigned long to string */ extern char *inet_ntoa(unsigned long); extern unsigned long inet_aton(const char *); /**********************************************************************/ #endif /* __NET_H__ */
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