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u-boot/include/net.h
Wolfgang Denk 2ea9103924 SPDX License cleanup for LiMon imported files 
A number of network related files were imported from the LiMon
project; these contain a somewhat unclear license statement:

	Copyright 1994 - 2000 Neil Russell.
	(See License)

I analyzed the source code of LiMon v1.4.2 which was used for this
import.  It does not contain any "License" file, but the top level
directory contains a file "COPYING", which turns out to be GPL v2
of June 1991.  So it is legitimate to conclude that the LiMon derived
files are also to be released under GPLv2.  Mark them as such.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2014-10-10 09:44:43 -04:00

705 lines
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/*
* LiMon Monitor (LiMon) - Network.
*
* Copyright 1994 - 2000 Neil Russell.
* (See License)
* SPDX-License-Identifier: GPL-2.0
*
* 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>
#endif /* CONFIG_8xx */
#include <asm/cache.h>
#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
#define DEBUG_LL_STATE 0 /* Link local state machine changes */
#define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
#define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
#define DEBUG_INT_STATE 0 /* Internal network state changes */
/*
* The number of receive packet buffers, and the required packet buffer
* alignment in memory.
*
*/
#ifdef CONFIG_SYS_RX_ETH_BUFFER
# define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
#else
# define PKTBUFSRX 4
#endif
#define PKTALIGN ARCH_DMA_MINALIGN
/* IPv4 addresses are always 32 bits in size */
typedef __be32 IPaddr_t;
/**
* An incoming packet handler.
* @param pkt pointer to the application packet
* @param dport destination UDP port
* @param sip source IP address
* @param sport source UDP port
* @param len packet length
*/
typedef void rxhand_f(uchar *pkt, unsigned dport,
IPaddr_t sip, unsigned sport,
unsigned len);
/**
* An incoming ICMP packet handler.
* @param type ICMP type
* @param code ICMP code
* @param dport destination UDP port
* @param sip source IP address
* @param sport source UDP port
* @param pkt pointer to the ICMP packet data
* @param len packet length
*/
typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
/*
* A timeout handler. Called after time interval has expired.
*/
typedef void thand_f(void);
enum eth_state_t {
ETH_STATE_INIT,
ETH_STATE_PASSIVE,
ETH_STATE_ACTIVE
};
struct eth_device {
char name[16];
unsigned char enetaddr[6];
int iobase;
int state;
int (*init) (struct eth_device *, bd_t *);
int (*send) (struct eth_device *, void *packet, int length);
int (*recv) (struct eth_device *);
void (*halt) (struct eth_device *);
#ifdef CONFIG_MCAST_TFTP
int (*mcast) (struct eth_device *, const u8 *enetaddr, u8 set);
#endif
int (*write_hwaddr) (struct eth_device *);
struct eth_device *next;
int index;
void *priv;
};
extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
extern int eth_register(struct eth_device* dev);/* Register network device */
extern int eth_unregister(struct eth_device *dev);/* Remove network device */
extern void eth_try_another(int first_restart); /* Change the device */
extern void eth_set_current(void); /* set nterface to ethcur var */
/* get the current device MAC */
extern struct eth_device *eth_current;
static inline __attribute__((always_inline))
struct eth_device *eth_get_dev(void)
{
return eth_current;
}
extern struct eth_device *eth_get_dev_by_name(const char *devname);
extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
extern int eth_get_dev_index(void); /* get the device index */
extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
/*
* Get the hardware address for an ethernet interface .
* Args:
* base_name - base name for device (normally "eth")
* index - device index number (0 for first)
* enetaddr - returns 6 byte hardware address
* Returns:
* Return true if the address is valid.
*/
extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
uchar *enetaddr);
extern int usb_eth_initialize(bd_t *bi);
extern int eth_init(bd_t *bis); /* Initialize the device */
extern int eth_send(void *packet, int length); /* Send a packet */
#ifdef CONFIG_API
extern int eth_receive(void *packet, int length); /* Receive a packet*/
extern void (*push_packet)(void *packet, int length);
#endif
extern int eth_rx(void); /* Check for received packets */
extern void eth_halt(void); /* stop SCC */
extern char *eth_get_name(void); /* get name of current device */
/* Set active state */
static inline __attribute__((always_inline)) int eth_init_state_only(bd_t *bis)
{
eth_get_dev()->state = ETH_STATE_ACTIVE;
return 0;
}
/* Set passive state */
static inline __attribute__((always_inline)) void eth_halt_state_only(void)
{
eth_get_dev()->state = ETH_STATE_PASSIVE;
}
/*
* Set the hardware address for an ethernet interface based on 'eth%daddr'
* environment variable (or just 'ethaddr' if eth_number is 0).
* Args:
* base_name - base name for device (normally "eth")
* eth_number - value of %d (0 for first device of this type)
* Returns:
* 0 is success, non-zero is error status from driver.
*/
int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
int eth_number);
#ifdef CONFIG_MCAST_TFTP
int eth_mcast_join(IPaddr_t mcast_addr, u8 join);
u32 ether_crc(size_t len, unsigned char const *p);
#endif
/**********************************************************************/
/*
* Protocol headers.
*/
/*
* Ethernet header
*/
struct ethernet_hdr {
uchar et_dest[6]; /* Destination node */
uchar et_src[6]; /* Source node */
ushort et_protlen; /* Protocol or length */
};
/* Ethernet header size */
#define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
struct e802_hdr {
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 */
};
/* 802 + SNAP + ethernet header size */
#define E802_HDR_SIZE (sizeof(struct e802_hdr))
/*
* Virtual LAN Ethernet header
*/
struct vlan_ethernet_hdr {
uchar vet_dest[6]; /* Destination node */
uchar vet_src[6]; /* Source node */
ushort vet_vlan_type; /* PROT_VLAN */
ushort vet_tag; /* TAG of VLAN */
ushort vet_type; /* protocol type */
};
/* VLAN Ethernet header size */
#define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
#define PROT_IP 0x0800 /* IP protocol */
#define PROT_ARP 0x0806 /* IP ARP protocol */
#define PROT_RARP 0x8035 /* IP ARP protocol */
#define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
#define IPPROTO_UDP 17 /* User Datagram Protocol */
/*
* Internet Protocol (IP) header.
*/
struct ip_hdr {
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 */
};
#define IP_OFFS 0x1fff /* ip offset *= 8 */
#define IP_FLAGS 0xe000 /* first 3 bits */
#define IP_FLAGS_RES 0x8000 /* reserved */
#define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
#define IP_FLAGS_MFRAG 0x2000 /* more fragments */
#define IP_HDR_SIZE (sizeof(struct ip_hdr))
/*
* Internet Protocol (IP) + UDP header.
*/
struct ip_udp_hdr {
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 */
};
#define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
#define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
/*
* Address Resolution Protocol (ARP) header.
*/
struct arp_hdr {
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 */
# define ARP_HLEN 6
uchar ar_pln; /* Length of protocol address */
# define ARP_PLEN 4
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];
#define ar_sha ar_data[0]
#define ar_spa ar_data[ARP_HLEN]
#define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
#define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
#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 */
};
#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_NOT_REACH 3 /* Detination unreachable */
#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 */
/* Codes for NOT_REACH */
#define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
struct icmp_hdr {
uchar type;
uchar code;
ushort checksum;
union {
struct {
ushort id;
ushort sequence;
} echo;
ulong gateway;
struct {
ushort unused;
ushort mtu;
} frag;
uchar data[0];
} un;
};
#define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
#define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
/*
* 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 address */
extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown) */
extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown) */
#if defined(CONFIG_BOOTP_DNS2)
extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown) */
#endif
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 uchar *NetTxPacket; /* THE transmit packet */
extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
extern uchar *NetRxPacket; /* Current receive packet */
extern int NetRxPacketLen; /* Current rx packet length */
extern unsigned NetIPID; /* IP ID (counting) */
extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
extern uchar NetEtherNullAddr[6];
#define VLAN_NONE 4095 /* untagged */
#define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
extern ushort NetOurVLAN; /* Our VLAN */
extern ushort NetOurNativeVLAN; /* Our Native VLAN */
extern int NetRestartWrap; /* Tried all network devices */
enum proto_t {
BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
TFTPSRV, TFTPPUT, LINKLOCAL
};
/* from net/net.c */
extern char BootFile[128]; /* Boot File name */
#if defined(CONFIG_CMD_DNS)
extern char *NetDNSResolve; /* The host to resolve */
extern char *NetDNSenvvar; /* the env var to put the ip into */
#endif
#if defined(CONFIG_CMD_PING)
extern IPaddr_t NetPingIP; /* the ip address to ping */
#endif
#if defined(CONFIG_CMD_CDP)
/* when CDP completes these hold the return values */
extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
/*
* Check for a CDP packet by examining the received MAC address field
*/
static inline int is_cdp_packet(const uchar *et_addr)
{
extern const uchar NetCDPAddr[6];
return memcmp(et_addr, NetCDPAddr, 6) == 0;
}
#endif
#if defined(CONFIG_CMD_SNTP)
extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
extern int NetTimeOffset; /* offset time from UTC */
#endif
#if defined(CONFIG_MCAST_TFTP)
extern IPaddr_t Mcast_addr;
#endif
/* Initialize the network adapter */
extern void net_init(void);
extern int NetLoop(enum proto_t);
/* Shutdown adapters and cleanup */
extern void NetStop(void);
/* Load failed. Start again. */
extern void NetStartAgain(void);
/* Get size of the ethernet header when we send */
extern int NetEthHdrSize(void);
/* Set ethernet header; returns the size of the header */
extern int NetSetEther(uchar *, uchar *, uint);
extern int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
/* Set IP header */
extern void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source);
extern void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport,
int sport, int len);
/* Checksum */
extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
extern uint NetCksum(uchar *, int); /* Calculate the checksum */
/* Callbacks */
extern rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
extern void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
extern rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
extern void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
/* Network loop state */
enum net_loop_state {
NETLOOP_CONTINUE,
NETLOOP_RESTART,
NETLOOP_SUCCESS,
NETLOOP_FAIL
};
extern enum net_loop_state net_state;
static inline void net_set_state(enum net_loop_state state)
{
debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
net_state = state;
}
/* Transmit a packet */
static inline void NetSendPacket(uchar *pkt, int len)
{
(void) eth_send(pkt, len);
}
/*
* Transmit "NetTxPacket" as UDP packet, performing ARP request if needed
* (ether will be populated)
*
* @param ether Raw packet buffer
* @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, IPaddr_t src_ip, unsigned dest_port,
unsigned src_port, unsigned len);
#endif
static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)
{
#ifdef CONFIG_NETCONSOLE
extern enum proto_t net_loop_last_protocol;
return net_loop_last_protocol != NETCONS;
#else
return 1;
#endif
}
static inline void eth_set_last_protocol(int protocol)
{
#ifdef CONFIG_NETCONSOLE
extern enum proto_t net_loop_last_protocol;
net_loop_last_protocol = protocol;
#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);
}
/**
* eth_random_addr - Generate software assigned random Ethernet address
* @addr: Pointer to a six-byte array containing the Ethernet address
*
* Generate a random Ethernet address (MAC) that is not multicast
* and has the local assigned bit set.
*/
static inline void eth_random_addr(uchar *addr)
{
int i;
unsigned int seed = get_timer(0);
for (i = 0; i < 6; i++)
addr[i] = rand_r(&seed);
addr[0] &= 0xfe; /* clear multicast bit */
addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
}
/* 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);
/* Update U-Boot over TFTP */
extern int update_tftp(ulong addr);
/**********************************************************************/
#endif /* __NET_H__ */
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