Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
471 lines
12 KiB
C
471 lines
12 KiB
C
/*
|
|
* 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__
|
|
|
|
#include <driver.h>
|
|
#include <linux/types.h>
|
|
#include <param.h>
|
|
#include <malloc.h>
|
|
#include <stdlib.h>
|
|
#include <clock.h>
|
|
#include <led.h>
|
|
#include <xfuncs.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/string.h> /* memcpy */
|
|
#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
|
|
|
|
/* How often do we retry to send packages */
|
|
#define PKT_NUM_RETRIES 4
|
|
|
|
/* The number of receive packet buffers */
|
|
#define PKTBUFSRX 4
|
|
|
|
struct device_d;
|
|
|
|
struct eth_device {
|
|
int active;
|
|
|
|
int (*init) (struct eth_device*);
|
|
|
|
int (*open) (struct eth_device*);
|
|
int (*send) (struct eth_device*, void *packet, int length);
|
|
int (*recv) (struct eth_device*);
|
|
void (*halt) (struct eth_device*);
|
|
int (*get_ethaddr) (struct eth_device*, u8 adr[6]);
|
|
int (*set_ethaddr) (struct eth_device*, const unsigned char *adr);
|
|
|
|
struct eth_device *next;
|
|
void *priv;
|
|
|
|
/* phy device may attach itself for hardware timestamping */
|
|
struct phy_device *phydev;
|
|
|
|
struct device_d dev;
|
|
struct device_d *parent;
|
|
char *nodepath;
|
|
|
|
struct list_head list;
|
|
|
|
IPaddr_t ipaddr;
|
|
IPaddr_t serverip;
|
|
IPaddr_t netmask;
|
|
IPaddr_t gateway;
|
|
char ethaddr_param[6];
|
|
char ethaddr[6];
|
|
};
|
|
|
|
#define dev_to_edev(d) container_of(d, struct eth_device, dev)
|
|
|
|
int eth_register(struct eth_device* dev); /* Register network device */
|
|
void eth_unregister(struct eth_device* dev); /* Unregister network device */
|
|
int eth_set_ethaddr(struct eth_device *edev, const char *ethaddr);
|
|
|
|
int eth_send(struct eth_device *edev, void *packet, int length); /* Send a packet */
|
|
int eth_rx(void); /* Check for received packets */
|
|
|
|
/* associate a MAC address to a ethernet device. Should be called by
|
|
* board code for boards which store their MAC address at some unusual
|
|
* place.
|
|
*/
|
|
#if !defined(CONFIG_NET)
|
|
static inline void eth_register_ethaddr(int ethid, const char *ethaddr)
|
|
{
|
|
}
|
|
static inline void of_eth_register_ethaddr(struct device_node *node,
|
|
const char *ethaddr)
|
|
{
|
|
}
|
|
#else
|
|
void eth_register_ethaddr(int ethid, const char *ethaddr);
|
|
void of_eth_register_ethaddr(struct device_node *node, const char *ethaddr);
|
|
#endif
|
|
/*
|
|
* Ethernet header
|
|
*/
|
|
struct ethernet {
|
|
uint8_t et_dest[6]; /* Destination node */
|
|
uint8_t et_src[6]; /* Source node */
|
|
uint16_t et_protlen; /* Protocol or length */
|
|
} __attribute__ ((packed));
|
|
|
|
#define ETHER_HDR_SIZE 14 /* Ethernet header size */
|
|
|
|
#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 iphdr {
|
|
uint8_t hl_v;
|
|
uint8_t tos;
|
|
uint16_t tot_len;
|
|
uint16_t id;
|
|
uint16_t frag_off;
|
|
uint8_t ttl;
|
|
uint8_t protocol;
|
|
uint16_t check;
|
|
uint32_t saddr;
|
|
uint32_t daddr;
|
|
/* The options start here. */
|
|
} __attribute__ ((packed));
|
|
|
|
struct udphdr {
|
|
uint16_t uh_sport; /* source port */
|
|
uint16_t uh_dport; /* destination port */
|
|
uint16_t uh_ulen; /* udp length */
|
|
uint16_t uh_sum; /* udp checksum */
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* Address Resolution Protocol (ARP) header.
|
|
*/
|
|
struct arprequest
|
|
{
|
|
uint16_t ar_hrd; /* Format of hardware address */
|
|
#define ARP_ETHER 1 /* Ethernet hardware address */
|
|
uint16_t ar_pro; /* Format of protocol address */
|
|
uint8_t ar_hln; /* Length of hardware address */
|
|
uint8_t ar_pln; /* Length of protocol address */
|
|
uint16_t 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.
|
|
*/
|
|
uint8_t ar_data[0];
|
|
} __attribute__ ((packed));
|
|
|
|
#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 */
|
|
|
|
struct icmphdr {
|
|
uint8_t type;
|
|
uint8_t code;
|
|
uint16_t checksum;
|
|
union {
|
|
struct {
|
|
uint16_t id;
|
|
uint16_t sequence;
|
|
} echo;
|
|
uint32_t gateway;
|
|
struct {
|
|
uint16_t __unused;
|
|
uint16_t mtu;
|
|
} frag;
|
|
} un;
|
|
} __attribute__ ((packed));
|
|
|
|
|
|
/*
|
|
* 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).
|
|
*/
|
|
#define PKTSIZE 1518
|
|
|
|
/**********************************************************************/
|
|
/*
|
|
* Globals.
|
|
*
|
|
* Note:
|
|
*
|
|
* All variables of type IPaddr_t are stored in NETWORK byte order
|
|
* (big endian).
|
|
*/
|
|
|
|
extern unsigned char *NetRxPackets[PKTBUFSRX];/* Receive packets */
|
|
|
|
void net_set_ip(IPaddr_t ip);
|
|
void net_set_serverip(IPaddr_t ip);
|
|
void net_set_netmask(IPaddr_t ip);
|
|
void net_set_gateway(IPaddr_t ip);
|
|
IPaddr_t net_get_ip(void);
|
|
IPaddr_t net_get_serverip(void);
|
|
|
|
/* Do the work */
|
|
void net_poll(void);
|
|
|
|
static inline struct iphdr *net_eth_to_iphdr(char *pkt)
|
|
{
|
|
return (struct iphdr *)(pkt + ETHER_HDR_SIZE);
|
|
}
|
|
|
|
static inline struct udphdr *net_eth_to_udphdr(char *pkt)
|
|
{
|
|
return (struct udphdr *)(net_eth_to_iphdr(pkt) + 1);
|
|
}
|
|
|
|
static inline struct icmphdr *net_eth_to_icmphdr(char *pkt)
|
|
{
|
|
return (struct icmphdr *)(net_eth_to_iphdr(pkt) + 1);
|
|
}
|
|
|
|
static inline char *net_eth_to_icmp_payload(char *pkt)
|
|
{
|
|
return (char *)(net_eth_to_icmphdr(pkt) + 1);
|
|
}
|
|
|
|
static inline char *net_eth_to_udp_payload(char *pkt)
|
|
{
|
|
return (char *)(net_eth_to_udphdr(pkt) + 1);
|
|
}
|
|
|
|
static inline int net_eth_to_udplen(char *pkt)
|
|
{
|
|
struct udphdr *udp = net_eth_to_udphdr(pkt);
|
|
return ntohs(udp->uh_ulen) - 8;
|
|
}
|
|
|
|
int net_checksum_ok(unsigned char *, int); /* Return true if cksum OK */
|
|
uint16_t net_checksum(unsigned char *, int); /* Calculate the checksum */
|
|
|
|
/* Print an IP address on the console */
|
|
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 net_read_ip(void *from)
|
|
{
|
|
IPaddr_t ip;
|
|
memcpy((void*)&ip, from, sizeof(ip));
|
|
return ip;
|
|
}
|
|
|
|
/* return uint32 *in network byteorder* */
|
|
static inline uint32_t net_read_uint32(void *from)
|
|
{
|
|
uint32_t tmp;
|
|
memcpy(&tmp, from, sizeof(tmp));
|
|
return tmp;
|
|
}
|
|
|
|
static inline uint64_t net_read_uint64(void *from)
|
|
{
|
|
uint64_t tmp;
|
|
memcpy(&tmp, from, sizeof(tmp));
|
|
return tmp;
|
|
}
|
|
|
|
/* write IP *in network byteorder* */
|
|
static inline void net_write_ip(void *to, IPaddr_t ip)
|
|
{
|
|
memcpy(to, (void*)&ip, sizeof(ip));
|
|
}
|
|
|
|
/* copy IP */
|
|
static inline void net_copy_ip(void *to, void *from)
|
|
{
|
|
memcpy(to, from, sizeof(IPaddr_t));
|
|
}
|
|
|
|
/* copy ulong */
|
|
static inline void net_copy_uint32(uint32_t *to, uint32_t *from)
|
|
{
|
|
memcpy(to, from, sizeof(uint32_t));
|
|
}
|
|
|
|
/* Convert an IP address to a string */
|
|
char *ip_to_string (IPaddr_t x);
|
|
|
|
/* Convert a string to ip address */
|
|
int string_to_ip(const char *s, IPaddr_t *ip);
|
|
|
|
IPaddr_t getenv_ip(const char *name);
|
|
int setenv_ip(const char *name, IPaddr_t ip);
|
|
|
|
int string_to_ethaddr(const char *str, u8 enetaddr[6]);
|
|
void ethaddr_to_string(const u8 enetaddr[6], char *str);
|
|
|
|
#ifdef CONFIG_NET_RESOLV
|
|
IPaddr_t resolv(char *host);
|
|
#else
|
|
static inline IPaddr_t resolv(char *host)
|
|
{
|
|
IPaddr_t ip = 0;
|
|
string_to_ip(host, &ip);
|
|
return ip;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* 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_local_ether_addr - Determine if the Ethernet address is locally-assigned one (IEEE 802).
|
|
* @addr: Pointer to a six-byte array containing the Ethernet address
|
|
*
|
|
* Return true if the address is a local address.
|
|
*/
|
|
static inline int is_local_ether_addr(const u8 *addr)
|
|
{
|
|
return (0x02 & 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;
|
|
}
|
|
|
|
#define ETH_ALEN 6
|
|
|
|
/**
|
|
* random_ether_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 random_ether_addr(u8 *addr)
|
|
{
|
|
srand(get_time_ns());
|
|
get_random_bytes(addr, ETH_ALEN);
|
|
addr[0] &= 0xfe; /* clear multicast bit */
|
|
addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
typedef void rx_handler_f(void *ctx, char *packet, unsigned int len);
|
|
|
|
void eth_set_current(struct eth_device *eth);
|
|
struct eth_device *eth_get_current(void);
|
|
struct eth_device *eth_get_byname(const char *name);
|
|
|
|
/**
|
|
* net_receive - Pass a received packet from an ethernet driver to the protocol stack
|
|
* @pkt: Pointer to the packet
|
|
* @len: length of the packet
|
|
*
|
|
* Return 0 if the packet is successfully handled. Can be ignored
|
|
*/
|
|
int net_receive(struct eth_device *edev, unsigned char *pkt, int len);
|
|
|
|
struct net_connection {
|
|
struct ethernet *et;
|
|
struct iphdr *ip;
|
|
struct udphdr *udp;
|
|
struct eth_device *edev;
|
|
struct icmphdr *icmp;
|
|
unsigned char *packet;
|
|
struct list_head list;
|
|
rx_handler_f *handler;
|
|
int proto;
|
|
void *priv;
|
|
};
|
|
|
|
static inline char *net_alloc_packet(void)
|
|
{
|
|
return xmemalign(32, PKTSIZE);
|
|
}
|
|
|
|
struct net_connection *net_udp_new(IPaddr_t dest, uint16_t dport,
|
|
rx_handler_f *handler, void *ctx);
|
|
|
|
struct net_connection *net_icmp_new(IPaddr_t dest, rx_handler_f *handler,
|
|
void *ctx);
|
|
|
|
void net_unregister(struct net_connection *con);
|
|
|
|
static inline int net_udp_bind(struct net_connection *con, uint16_t sport)
|
|
{
|
|
con->udp->uh_sport = ntohs(sport);
|
|
return 0;
|
|
}
|
|
|
|
static inline void *net_udp_get_payload(struct net_connection *con)
|
|
{
|
|
return con->packet + sizeof(struct ethernet) + sizeof(struct iphdr) +
|
|
sizeof(struct udphdr);
|
|
}
|
|
|
|
int net_udp_send(struct net_connection *con, int len);
|
|
int net_icmp_send(struct net_connection *con, int len);
|
|
|
|
void led_trigger_network(enum led_trigger trigger);
|
|
|
|
#define IFUP_FLAG_FORCE (1 << 0)
|
|
|
|
int ifup(const char *name, unsigned flags);
|
|
int ifup_all(unsigned flags);
|
|
|
|
#endif /* __NET_H__ */
|