e94070c443
Use the NetArpTxPacket for the ARP packet, not to hold what used to be in NetTxPacket. This saves a copy and makes the code easier to understand. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Acked-by: Simon Glass <sjg@chromium.org>
637 lines
18 KiB
C
637 lines
18 KiB
C
/*
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* LiMon Monitor (LiMon) - Network.
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*
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* Copyright 1994 - 2000 Neil Russell.
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* (See License)
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*
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*
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* History
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* 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
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*/
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#ifndef __NET_H__
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#define __NET_H__
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#if defined(CONFIG_8xx)
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#include <commproc.h>
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#endif /* CONFIG_8xx */
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#include <asm/cache.h>
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#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
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/*
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* The number of receive packet buffers, and the required packet buffer
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* alignment in memory.
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*
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*/
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#ifdef CONFIG_SYS_RX_ETH_BUFFER
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# define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
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#else
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# define PKTBUFSRX 4
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#endif
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#define PKTALIGN ARCH_DMA_MINALIGN
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/* IPv4 addresses are always 32 bits in size */
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typedef u32 IPaddr_t;
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/**
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* An incoming packet handler.
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* @param pkt pointer to the application packet
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* @param dport destination UDP port
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* @param sip source IP address
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* @param sport source UDP port
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* @param len packet length
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*/
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typedef void rxhand_f(uchar *pkt, unsigned dport,
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IPaddr_t sip, unsigned sport,
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unsigned len);
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/**
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* An incoming ICMP packet handler.
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* @param type ICMP type
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* @param code ICMP code
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* @param dport destination UDP port
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* @param sip source IP address
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* @param sport source UDP port
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* @param pkt pointer to the ICMP packet data
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* @param len packet length
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*/
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typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
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IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
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/*
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* A timeout handler. Called after time interval has expired.
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*/
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typedef void thand_f(void);
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enum eth_state_t {
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ETH_STATE_INIT,
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ETH_STATE_PASSIVE,
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ETH_STATE_ACTIVE
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};
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struct eth_device {
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char name[16];
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unsigned char enetaddr[6];
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int iobase;
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int state;
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int (*init) (struct eth_device *, bd_t *);
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int (*send) (struct eth_device *, void *packet, int length);
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int (*recv) (struct eth_device *);
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void (*halt) (struct eth_device *);
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#ifdef CONFIG_MCAST_TFTP
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int (*mcast) (struct eth_device *, u32 ip, u8 set);
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#endif
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int (*write_hwaddr) (struct eth_device *);
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struct eth_device *next;
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int index;
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void *priv;
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};
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extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
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extern int eth_register(struct eth_device* dev);/* Register network device */
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extern int eth_unregister(struct eth_device *dev);/* Remove network device */
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extern void eth_try_another(int first_restart); /* Change the device */
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extern void eth_set_current(void); /* set nterface to ethcur var */
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extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
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extern struct eth_device *eth_get_dev_by_name(const char *devname);
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extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
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extern int eth_get_dev_index(void); /* get the device index */
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extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
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extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
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extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
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/*
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* Get the hardware address for an ethernet interface .
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* Args:
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* base_name - base name for device (normally "eth")
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* index - device index number (0 for first)
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* enetaddr - returns 6 byte hardware address
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* Returns:
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* Return true if the address is valid.
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*/
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extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
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uchar *enetaddr);
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extern int usb_eth_initialize(bd_t *bi);
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extern int eth_init(bd_t *bis); /* Initialize the device */
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extern int eth_send(void *packet, int length); /* Send a packet */
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#ifdef CONFIG_API
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extern int eth_receive(void *packet, int length); /* Receive a packet*/
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extern void (*push_packet)(void *packet, int length);
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#endif
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extern int eth_rx(void); /* Check for received packets */
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extern void eth_halt(void); /* stop SCC */
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extern char *eth_get_name(void); /* get name of current device */
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/*
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* Set the hardware address for an ethernet interface based on 'eth%daddr'
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* environment variable (or just 'ethaddr' if eth_number is 0).
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* Args:
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* base_name - base name for device (normally "eth")
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* eth_number - value of %d (0 for first device of this type)
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* Returns:
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* 0 is success, non-zero is error status from driver.
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*/
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int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
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int eth_number);
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#ifdef CONFIG_MCAST_TFTP
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int eth_mcast_join(IPaddr_t mcast_addr, u8 join);
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u32 ether_crc(size_t len, unsigned char const *p);
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#endif
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/**********************************************************************/
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/*
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* Protocol headers.
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*/
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/*
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* Ethernet header
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*/
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struct ethernet_hdr {
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uchar et_dest[6]; /* Destination node */
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uchar et_src[6]; /* Source node */
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ushort et_protlen; /* Protocol or length */
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};
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/* Ethernet header size */
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#define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
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struct e802_hdr {
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uchar et_dest[6]; /* Destination node */
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uchar et_src[6]; /* Source node */
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ushort et_protlen; /* Protocol or length */
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uchar et_dsap; /* 802 DSAP */
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uchar et_ssap; /* 802 SSAP */
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uchar et_ctl; /* 802 control */
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uchar et_snap1; /* SNAP */
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uchar et_snap2;
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uchar et_snap3;
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ushort et_prot; /* 802 protocol */
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};
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/* 802 + SNAP + ethernet header size */
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#define E802_HDR_SIZE (sizeof(struct e802_hdr))
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/*
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* Virtual LAN Ethernet header
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*/
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struct vlan_ethernet_hdr {
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uchar vet_dest[6]; /* Destination node */
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uchar vet_src[6]; /* Source node */
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ushort vet_vlan_type; /* PROT_VLAN */
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ushort vet_tag; /* TAG of VLAN */
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ushort vet_type; /* protocol type */
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};
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/* VLAN Ethernet header size */
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#define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
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#define PROT_IP 0x0800 /* IP protocol */
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#define PROT_ARP 0x0806 /* IP ARP protocol */
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#define PROT_RARP 0x8035 /* IP ARP protocol */
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#define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
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#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
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#define IPPROTO_UDP 17 /* User Datagram Protocol */
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/*
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* Internet Protocol (IP) header.
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*/
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struct ip_hdr {
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uchar ip_hl_v; /* header length and version */
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uchar ip_tos; /* type of service */
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ushort ip_len; /* total length */
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ushort ip_id; /* identification */
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ushort ip_off; /* fragment offset field */
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uchar ip_ttl; /* time to live */
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uchar ip_p; /* protocol */
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ushort ip_sum; /* checksum */
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IPaddr_t ip_src; /* Source IP address */
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IPaddr_t ip_dst; /* Destination IP address */
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};
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#define IP_OFFS 0x1fff /* ip offset *= 8 */
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#define IP_FLAGS 0xe000 /* first 3 bits */
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#define IP_FLAGS_RES 0x8000 /* reserved */
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#define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
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#define IP_FLAGS_MFRAG 0x2000 /* more fragments */
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#define IP_HDR_SIZE (sizeof(struct ip_hdr))
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/*
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* Internet Protocol (IP) + UDP header.
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*/
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struct ip_udp_hdr {
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uchar ip_hl_v; /* header length and version */
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uchar ip_tos; /* type of service */
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ushort ip_len; /* total length */
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ushort ip_id; /* identification */
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ushort ip_off; /* fragment offset field */
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uchar ip_ttl; /* time to live */
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uchar ip_p; /* protocol */
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ushort ip_sum; /* checksum */
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IPaddr_t ip_src; /* Source IP address */
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IPaddr_t ip_dst; /* Destination IP address */
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ushort udp_src; /* UDP source port */
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ushort udp_dst; /* UDP destination port */
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ushort udp_len; /* Length of UDP packet */
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ushort udp_xsum; /* Checksum */
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};
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#define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
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#define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
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/*
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* Address Resolution Protocol (ARP) header.
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*/
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struct arp_hdr {
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ushort ar_hrd; /* Format of hardware address */
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# define ARP_ETHER 1 /* Ethernet hardware address */
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ushort ar_pro; /* Format of protocol address */
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uchar ar_hln; /* Length of hardware address */
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# define ARP_HLEN 6
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uchar ar_pln; /* Length of protocol address */
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# define ARP_PLEN 4
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ushort ar_op; /* Operation */
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# define ARPOP_REQUEST 1 /* Request to resolve address */
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# define ARPOP_REPLY 2 /* Response to previous request */
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# define RARPOP_REQUEST 3 /* Request to resolve address */
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# define RARPOP_REPLY 4 /* Response to previous request */
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/*
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* The remaining fields are variable in size, according to
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* the sizes above, and are defined as appropriate for
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* specific hardware/protocol combinations.
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*/
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uchar ar_data[0];
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#define ar_sha ar_data[0]
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#define ar_spa ar_data[ARP_HLEN]
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#define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
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#define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
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#if 0
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uchar ar_sha[]; /* Sender hardware address */
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uchar ar_spa[]; /* Sender protocol address */
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uchar ar_tha[]; /* Target hardware address */
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uchar ar_tpa[]; /* Target protocol address */
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#endif /* 0 */
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};
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#define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
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/*
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* ICMP stuff (just enough to handle (host) redirect messages)
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*/
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#define ICMP_ECHO_REPLY 0 /* Echo reply */
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#define ICMP_NOT_REACH 3 /* Detination unreachable */
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#define ICMP_REDIRECT 5 /* Redirect (change route) */
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#define ICMP_ECHO_REQUEST 8 /* Echo request */
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/* Codes for REDIRECT. */
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#define ICMP_REDIR_NET 0 /* Redirect Net */
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#define ICMP_REDIR_HOST 1 /* Redirect Host */
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/* Codes for NOT_REACH */
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#define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
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struct icmp_hdr {
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uchar type;
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uchar code;
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ushort checksum;
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union {
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struct {
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ushort id;
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ushort sequence;
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} echo;
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ulong gateway;
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struct {
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ushort __unused;
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ushort mtu;
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} frag;
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uchar data[0];
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} un;
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};
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#define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
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#define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
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/*
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* Maximum packet size; used to allocate packet storage.
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* TFTP packets can be 524 bytes + IP header + ethernet header.
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* Lets be conservative, and go for 38 * 16. (Must also be
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* a multiple of 32 bytes).
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*/
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/*
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* AS.HARNOIS : Better to set PKTSIZE to maximum size because
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* traffic type is not always controlled
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* maximum packet size = 1518
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* maximum packet size and multiple of 32 bytes = 1536
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*/
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#define PKTSIZE 1518
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#define PKTSIZE_ALIGN 1536
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/*#define PKTSIZE 608*/
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/*
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* Maximum receive ring size; that is, the number of packets
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* we can buffer before overflow happens. Basically, this just
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* needs to be enough to prevent a packet being discarded while
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* we are processing the previous one.
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*/
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#define RINGSZ 4
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#define RINGSZ_LOG2 2
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/**********************************************************************/
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/*
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* Globals.
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*
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* Note:
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*
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* All variables of type IPaddr_t are stored in NETWORK byte order
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* (big endian).
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*/
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/* net.c */
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/** BOOTP EXTENTIONS **/
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extern IPaddr_t NetOurGatewayIP; /* Our gateway IP address */
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extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
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extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
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#if defined(CONFIG_BOOTP_DNS2)
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extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
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#endif
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extern char NetOurNISDomain[32]; /* Our NIS domain */
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extern char NetOurHostName[32]; /* Our hostname */
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extern char NetOurRootPath[64]; /* Our root path */
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extern ushort NetBootFileSize; /* Our boot file size in blocks */
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/** END OF BOOTP EXTENTIONS **/
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extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
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extern uchar NetOurEther[6]; /* Our ethernet address */
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extern uchar NetServerEther[6]; /* Boot server enet address */
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extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
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extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
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extern uchar *NetTxPacket; /* THE transmit packet */
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extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
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extern uchar *NetRxPacket; /* Current receive packet */
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extern int NetRxPacketLen; /* Current rx packet length */
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extern unsigned NetIPID; /* IP ID (counting) */
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extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
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extern uchar NetEtherNullAddr[6];
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#define VLAN_NONE 4095 /* untagged */
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#define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
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extern ushort NetOurVLAN; /* Our VLAN */
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extern ushort NetOurNativeVLAN; /* Our Native VLAN */
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extern int NetRestartWrap; /* Tried all network devices */
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enum proto_t {
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BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
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TFTPSRV, TFTPPUT
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};
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/* from net/net.c */
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extern char BootFile[128]; /* Boot File name */
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#if defined(CONFIG_CMD_DNS)
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extern char *NetDNSResolve; /* The host to resolve */
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extern char *NetDNSenvvar; /* the env var to put the ip into */
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#endif
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#if defined(CONFIG_CMD_PING)
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extern IPaddr_t NetPingIP; /* the ip address to ping */
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#endif
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#if defined(CONFIG_CMD_CDP)
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/* when CDP completes these hold the return values */
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extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
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extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
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/*
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* Check for a CDP packet by examining the received MAC address field
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*/
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static inline int is_cdp_packet(const uchar *et_addr)
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{
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extern const uchar NetCDPAddr[6];
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return memcmp(et_addr, NetCDPAddr, 6) == 0;
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}
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#endif
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#if defined(CONFIG_CMD_SNTP)
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extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
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extern int NetTimeOffset; /* offset time from UTC */
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#endif
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#if defined(CONFIG_MCAST_TFTP)
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extern IPaddr_t Mcast_addr;
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#endif
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/* Initialize the network adapter */
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extern void net_init(void);
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extern int NetLoop(enum proto_t);
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/* Shutdown adapters and cleanup */
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extern void NetStop(void);
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/* Load failed. Start again. */
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extern void NetStartAgain(void);
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/* Get size of the ethernet header when we send */
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extern int NetEthHdrSize(void);
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/* Set ethernet header; returns the size of the header */
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extern int NetSetEther(uchar *, uchar *, uint);
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extern int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
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/* Set IP header */
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extern void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
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extern void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
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int sport, int len);
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/* Checksum */
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extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
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extern uint NetCksum(uchar *, int); /* Calculate the checksum */
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/* Callbacks */
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extern rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
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extern void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
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extern rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
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extern void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
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extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
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extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
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/* Network loop state */
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enum net_loop_state {
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NETLOOP_CONTINUE,
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NETLOOP_RESTART,
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NETLOOP_SUCCESS,
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NETLOOP_FAIL
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};
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static inline void net_set_state(enum net_loop_state state)
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{
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extern enum net_loop_state net_state;
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net_state = state;
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}
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/* Transmit a packet */
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static inline void NetSendPacket(uchar *pkt, int len)
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{
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(void) eth_send(pkt, len);
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}
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/*
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* Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
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* (ether will be populated)
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*
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* @param ether Raw packet buffer
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* @param dest IP address to send the datagram to
|
|
* @param dport Destination UDP port
|
|
* @param sport Source UDP port
|
|
* @param payload_len Length of data after the UDP header
|
|
*/
|
|
extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport,
|
|
int sport, int payload_len);
|
|
|
|
/* Processes a received packet */
|
|
extern void NetReceive(uchar *, int);
|
|
|
|
#ifdef CONFIG_NETCONSOLE
|
|
void NcStart(void);
|
|
int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
|
|
#endif
|
|
|
|
/*
|
|
* Check if autoload is enabled. If so, use either NFS or TFTP to download
|
|
* the boot file.
|
|
*/
|
|
void net_auto_load(void);
|
|
|
|
/*
|
|
* 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, (void *)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((void *)to, from, sizeof(IPaddr_t));
|
|
}
|
|
|
|
/* copy ulong */
|
|
static inline void NetCopyLong(ulong *to, ulong *from)
|
|
{
|
|
memcpy((void *)to, (void *)from, sizeof(ulong));
|
|
}
|
|
|
|
/**
|
|
* is_zero_ether_addr - Determine if give Ethernet address is all zeros.
|
|
* @addr: Pointer to a six-byte array containing the Ethernet address
|
|
*
|
|
* Return true if the address is all zeroes.
|
|
*/
|
|
static inline int is_zero_ether_addr(const u8 *addr)
|
|
{
|
|
return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
|
|
}
|
|
|
|
/**
|
|
* is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
|
|
* @addr: Pointer to a six-byte array containing the Ethernet address
|
|
*
|
|
* Return true if the address is a multicast address.
|
|
* By definition the broadcast address is also a multicast address.
|
|
*/
|
|
static inline int is_multicast_ether_addr(const u8 *addr)
|
|
{
|
|
return 0x01 & addr[0];
|
|
}
|
|
|
|
/*
|
|
* is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
|
|
* @addr: Pointer to a six-byte array containing the Ethernet address
|
|
*
|
|
* Return true if the address is the broadcast address.
|
|
*/
|
|
static inline int is_broadcast_ether_addr(const u8 *addr)
|
|
{
|
|
return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
|
|
0xff;
|
|
}
|
|
|
|
/*
|
|
* is_valid_ether_addr - Determine if the given Ethernet address is valid
|
|
* @addr: Pointer to a six-byte array containing the Ethernet address
|
|
*
|
|
* Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
|
|
* a multicast address, and is not FF:FF:FF:FF:FF:FF.
|
|
*
|
|
* Return true if the address is valid.
|
|
*/
|
|
static inline int is_valid_ether_addr(const u8 *addr)
|
|
{
|
|
/* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
|
|
* explicitly check for it here. */
|
|
return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
|
|
}
|
|
|
|
/* 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(const char *s);
|
|
|
|
/* Convert a VLAN id to a string */
|
|
extern void VLAN_to_string(ushort x, char *s);
|
|
|
|
/* Convert a string to a vlan id */
|
|
extern ushort string_to_VLAN(const char *s);
|
|
|
|
/* read a VLAN id from an environment variable */
|
|
extern ushort getenv_VLAN(char *);
|
|
|
|
/* copy a filename (allow for "..." notation, limit length) */
|
|
extern void copy_filename(char *dst, const char *src, int size);
|
|
|
|
/* get a random source port */
|
|
extern unsigned int random_port(void);
|
|
|
|
/**********************************************************************/
|
|
|
|
#endif /* __NET_H__ */
|