/* * 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__ #if defined(CONFIG_8xx) #include <commproc.h> # if !defined(CONFIG_NET_MULTI) # if defined(FEC_ENET) || defined(SCC_ENET) # define CONFIG_NET_MULTI # endif # endif #endif /* CONFIG_8xx */ #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8260) #include <config.h> #if defined(CONFIG_ETHER_ON_FCC) #if defined(CONFIG_ETHER_ON_SCC) #error "Ethernet not correctly defined" #endif /* CONFIG_ETHER_ON_SCC */ #define CONFIG_NET_MULTI #if (CONFIG_ETHER_INDEX == 1) #define CONFIG_ETHER_ON_FCC1 # define CFG_CMXFCR_MASK1 CFG_CMXFCR_MASK # define CFG_CMXFCR_VALUE1 CFG_CMXFCR_VALUE #elif (CONFIG_ETHER_INDEX == 2) #define CONFIG_ETHER_ON_FCC2 # define CFG_CMXFCR_MASK2 CFG_CMXFCR_MASK # define CFG_CMXFCR_VALUE2 CFG_CMXFCR_VALUE #elif (CONFIG_ETHER_INDEX == 3) #define CONFIG_ETHER_ON_FCC3 # define CFG_CMXFCR_MASK3 CFG_CMXFCR_MASK # define CFG_CMXFCR_VALUE3 CFG_CMXFCR_VALUE #endif /* CONFIG_ETHER_INDEX */ #endif /* CONFIG_ETHER_ON_FCC */ #endif /* !CONFIG_NET_MULTI && CONFIG_8260 */ #include <asm/byteorder.h> /* for nton* / ntoh* stuff */ /* * The number of receive packet buffers, and the required packet buffer * alignment in memory. * */ #ifdef CFG_RX_ETH_BUFFER # define PKTBUFSRX CFG_RX_ETH_BUFFER #else # define PKTBUFSRX 4 #endif #define PKTALIGN 32 typedef ulong 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(uchar *, unsigned, unsigned, unsigned); /* * A timeout handler. Called after time interval has expired. */ typedef void thand_f(void); #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(int first_restart); /* Change the device */ extern struct eth_device *eth_get_dev(void); /* get the current device MAC */ extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */ extern int eth_init(bd_t *bis); /* Initialize the device */ extern int eth_send(volatile void *packet, int length); /* Send a packet */ extern int eth_rx(void); /* Check for received packets */ extern void eth_halt(void); /* stop SCC */ /**********************************************************************/ /* * Protocol headers. */ /* * Ethernet header */ typedef struct { uchar et_dest[6]; /* Destination node */ uchar et_src[6]; /* Source node */ ushort et_protlen; /* Protocol or length */ uchar et_dsap; /* 802 DSAP */ uchar et_ssap; /* 802 SSAP */ uchar et_ctl; /* 802 control */ uchar et_snap1; /* SNAP */ uchar et_snap2; uchar et_snap3; ushort 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 { uchar ip_hl_v; /* header length and version */ uchar ip_tos; /* type of service */ ushort ip_len; /* total length */ ushort ip_id; /* identification */ ushort ip_off; /* fragment offset field */ uchar ip_ttl; /* time to live */ uchar ip_p; /* protocol */ ushort ip_sum; /* checksum */ IPaddr_t ip_src; /* Source IP address */ IPaddr_t ip_dst; /* Destination IP address */ ushort udp_src; /* UDP source port */ ushort udp_dst; /* UDP destination port */ ushort udp_len; /* Length of UDP packet */ ushort 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 { ushort ar_hrd; /* Format of hardware address */ # define ARP_ETHER 1 /* Ethernet hardware address */ ushort ar_pro; /* Format of protocol address */ uchar ar_hln; /* Length of hardware address */ uchar ar_pln; /* Length of protocol address */ ushort 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. */ uchar ar_data[0]; #if 0 uchar ar_sha[]; /* Sender hardware address */ uchar ar_spa[]; /* Sender protocol address */ uchar ar_tha[]; /* Target hardware address */ uchar 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_ECHO_REPLY 0 /* Echo reply */ #define ICMP_REDIRECT 5 /* Redirect (change route) */ #define ICMP_ECHO_REQUEST 8 /* Echo request */ /* Codes for REDIRECT. */ #define ICMP_REDIR_NET 0 /* Redirect Net */ #define ICMP_REDIR_HOST 1 /* Redirect Host */ typedef struct icmphdr { uchar type; uchar code; ushort checksum; union { struct { ushort id; ushort sequence; } echo; ulong gateway; struct { ushort __unused; ushort 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. * * Note: * * All variables of type IPaddr_t are stored in NETWORK byte order * (big endian). */ /* 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 ushort NetBootFileSize; /* Our boot file size in blocks */ /** END OF BOOTP EXTENTIONS **/ extern ulong NetBootFileXferSize; /* size of bootfile in bytes */ extern uchar NetOurEther[6]; /* Our ethernet address */ extern uchar 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 uchar * NetTxPacket; /* THE transmit packet */ extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */ extern volatile uchar * NetRxPkt; /* Current receive packet */ extern int NetRxPktLen; /* Current rx packet length */ extern unsigned NetIPID; /* IP ID (counting) */ extern uchar 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 #ifdef CONFIG_NET_MULTI extern int NetRestartWrap; /* Tried all network devices */ #endif typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS } proto_t; /* from net/net.c */ extern char BootFile[128]; /* Boot File name */ #if (CONFIG_COMMANDS & CFG_CMD_PING) extern IPaddr_t NetPingIP; /* the ip address to ping */ #endif /* Initialize the network adapter */ extern int NetLoop(proto_t); /* Shutdown adapters and cleanup */ extern void NetStop(void); /* Load failed. Start again. */ extern void NetStartAgain(void); /* Set ethernet header */ extern void NetSetEther(volatile uchar *, uchar *, uint); /* Set IP header */ extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int); /* Checksum */ extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */ extern uint NetCksum(uchar *, 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 uchar *, int); /* Transmit UDP packet, performing ARP request if needed */ extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len); /* Processes a received packet */ extern void NetReceive(volatile uchar *, int); /* Print an IP address on the console */ extern void print_IPaddr (IPaddr_t); /* * The following functions are a bit ugly, but necessary to deal with * alignment restrictions on ARM. * * We're using inline functions, which had the smallest memory * footprint in our tests. */ /* return IP *in network byteorder* */ static inline IPaddr_t NetReadIP(void *from) { IPaddr_t ip; memcpy((void*)&ip, from, sizeof(ip)); return ip; } /* return ulong *in network byteorder* */ static inline ulong NetReadLong(ulong *from) { ulong l; memcpy((void*)&l, (void*)from, sizeof(l)); return l; } /* write IP *in network byteorder* */ static inline void NetWriteIP(void *to, IPaddr_t ip) { memcpy(to, (void*)&ip, sizeof(ip)); } /* copy IP */ static inline void NetCopyIP(void *to, void *from) { memcpy(to, from, sizeof(IPaddr_t)); } /* copy ulong */ static inline void NetCopyLong(ulong *to, ulong *from) { memcpy((void*)to, (void*)from, sizeof(ulong)); } /* Convert an IP address to a string */ extern void ip_to_string (IPaddr_t x, char *s); /* Convert a string to ip address */ extern IPaddr_t string_to_ip(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 (uchar *dst, uchar *src, int size); /**********************************************************************/ #endif /* __NET_H__ */