| /* |
| * 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 */ |
| struct in_addr { |
| __be32 s_addr; |
| }; |
| |
| /** |
| * 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, |
| struct in_addr 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, |
| struct in_addr 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 |
| }; |
| |
| #ifdef CONFIG_DM_ETH |
| /** |
| * struct eth_pdata - Platform data for Ethernet MAC controllers |
| * |
| * @iobase: The base address of the hardware registers |
| * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env |
| * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_... |
| */ |
| struct eth_pdata { |
| phys_addr_t iobase; |
| unsigned char enetaddr[6]; |
| int phy_interface; |
| }; |
| |
| enum eth_recv_flags { |
| /* |
| * Check hardware device for new packets (otherwise only return those |
| * which are already in the memory buffer ready to process) |
| */ |
| ETH_RECV_CHECK_DEVICE = 1 << 0, |
| }; |
| |
| /** |
| * struct eth_ops - functions of Ethernet MAC controllers |
| * |
| * start: Prepare the hardware to send and receive packets |
| * send: Send the bytes passed in "packet" as a packet on the wire |
| * recv: Check if the hardware received a packet. If so, set the pointer to the |
| * packet buffer in the packetp parameter. If not, return an error or 0 to |
| * indicate that the hardware receive FIFO is empty. If 0 is returned, the |
| * network stack will not process the empty packet, but free_pkt() will be |
| * called if supplied |
| * free_pkt: Give the driver an opportunity to manage its packet buffer memory |
| * when the network stack is finished processing it. This will only be |
| * called when no error was returned from recv - optional |
| * stop: Stop the hardware from looking for packets - may be called even if |
| * state == PASSIVE |
| * mcast: Join or leave a multicast group (for TFTP) - optional |
| * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux |
| * on some platforms like ARM). This function expects the |
| * eth_pdata::enetaddr field to be populated. The method can |
| * return -ENOSYS to indicate that this is not implemented for |
| this hardware - optional. |
| * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a |
| * ROM on the board. This is how the driver should expose it |
| * to the network stack. This function should fill in the |
| * eth_pdata::enetaddr field - optional |
| */ |
| struct eth_ops { |
| int (*start)(struct udevice *dev); |
| int (*send)(struct udevice *dev, void *packet, int length); |
| int (*recv)(struct udevice *dev, int flags, uchar **packetp); |
| int (*free_pkt)(struct udevice *dev, uchar *packet, int length); |
| void (*stop)(struct udevice *dev); |
| #ifdef CONFIG_MCAST_TFTP |
| int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join); |
| #endif |
| int (*write_hwaddr)(struct udevice *dev); |
| int (*read_rom_hwaddr)(struct udevice *dev); |
| }; |
| |
| #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops) |
| |
| struct udevice *eth_get_dev(void); /* get the current device */ |
| /* |
| * The devname can be either an exact name given by the driver or device tree |
| * or it can be an alias of the form "eth%d" |
| */ |
| struct udevice *eth_get_dev_by_name(const char *devname); |
| unsigned char *eth_get_ethaddr(void); /* get the current device MAC */ |
| |
| /* Used only when NetConsole is enabled */ |
| int eth_is_active(struct udevice *dev); /* Test device for active state */ |
| int eth_init_state_only(void); /* Set active state */ |
| void eth_halt_state_only(void); /* Set passive state */ |
| #endif |
| |
| #ifndef CONFIG_DM_ETH |
| struct eth_device { |
| char name[16]; |
| unsigned char enetaddr[6]; |
| phys_addr_t 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; |
| }; |
| |
| int eth_register(struct eth_device *dev);/* Register network device */ |
| int eth_unregister(struct eth_device *dev);/* Remove network device */ |
| |
| extern struct eth_device *eth_current; |
| |
| static inline __attribute__((always_inline)) |
| struct eth_device *eth_get_dev(void) |
| { |
| return eth_current; |
| } |
| struct eth_device *eth_get_dev_by_name(const char *devname); |
| struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */ |
| |
| /* get the current device MAC */ |
| static inline unsigned char *eth_get_ethaddr(void) |
| { |
| if (eth_current) |
| return eth_current->enetaddr; |
| return NULL; |
| } |
| |
| /* Used only when NetConsole is enabled */ |
| int eth_is_active(struct eth_device *dev); /* Test device for active state */ |
| /* Set active state */ |
| static inline __attribute__((always_inline)) int eth_init_state_only(void) |
| { |
| 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); |
| |
| int usb_eth_initialize(bd_t *bi); |
| #endif |
| |
| int eth_initialize(void); /* Initialize network subsystem */ |
| void eth_try_another(int first_restart); /* Change the device */ |
| void eth_set_current(void); /* set nterface to ethcur var */ |
| |
| int eth_get_dev_index(void); /* get the device index */ |
| void eth_parse_enetaddr(const char *addr, uchar *enetaddr); |
| int eth_getenv_enetaddr(const char *name, uchar *enetaddr); |
| int eth_setenv_enetaddr(const 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. |
| */ |
| int eth_getenv_enetaddr_by_index(const char *base_name, int index, |
| uchar *enetaddr); |
| |
| int eth_init(void); /* Initialize the device */ |
| int eth_send(void *packet, int length); /* Send a packet */ |
| |
| #ifdef CONFIG_API |
| int eth_receive(void *packet, int length); /* Receive a packet*/ |
| extern void (*push_packet)(void *packet, int length); |
| #endif |
| int eth_rx(void); /* Check for received packets */ |
| void eth_halt(void); /* stop SCC */ |
| const char *eth_get_name(void); /* get name of current device */ |
| |
| #ifdef CONFIG_MCAST_TFTP |
| int eth_mcast_join(struct in_addr mcast_addr, int join); |
| u32 ether_crc(size_t len, unsigned char const *p); |
| #endif |
| |
| |
| /**********************************************************************/ |
| /* |
| * Protocol headers. |
| */ |
| |
| /* |
| * Ethernet header |
| */ |
| |
| struct ethernet_hdr { |
| u8 et_dest[6]; /* Destination node */ |
| u8 et_src[6]; /* Source node */ |
| u16 et_protlen; /* Protocol or length */ |
| }; |
| |
| /* Ethernet header size */ |
| #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) |
| |
| #define ETH_FCS_LEN 4 /* Octets in the FCS */ |
| |
| struct e802_hdr { |
| u8 et_dest[6]; /* Destination node */ |
| u8 et_src[6]; /* Source node */ |
| u16 et_protlen; /* Protocol or length */ |
| u8 et_dsap; /* 802 DSAP */ |
| u8 et_ssap; /* 802 SSAP */ |
| u8 et_ctl; /* 802 control */ |
| u8 et_snap1; /* SNAP */ |
| u8 et_snap2; |
| u8 et_snap3; |
| u16 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 { |
| u8 vet_dest[6]; /* Destination node */ |
| u8 vet_src[6]; /* Source node */ |
| u16 vet_vlan_type; /* PROT_VLAN */ |
| u16 vet_tag; /* TAG of VLAN */ |
| u16 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 { |
| u8 ip_hl_v; /* header length and version */ |
| u8 ip_tos; /* type of service */ |
| u16 ip_len; /* total length */ |
| u16 ip_id; /* identification */ |
| u16 ip_off; /* fragment offset field */ |
| u8 ip_ttl; /* time to live */ |
| u8 ip_p; /* protocol */ |
| u16 ip_sum; /* checksum */ |
| struct in_addr ip_src; /* Source IP address */ |
| struct in_addr 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 { |
| u8 ip_hl_v; /* header length and version */ |
| u8 ip_tos; /* type of service */ |
| u16 ip_len; /* total length */ |
| u16 ip_id; /* identification */ |
| u16 ip_off; /* fragment offset field */ |
| u8 ip_ttl; /* time to live */ |
| u8 ip_p; /* protocol */ |
| u16 ip_sum; /* checksum */ |
| struct in_addr ip_src; /* Source IP address */ |
| struct in_addr ip_dst; /* Destination IP address */ |
| u16 udp_src; /* UDP source port */ |
| u16 udp_dst; /* UDP destination port */ |
| u16 udp_len; /* Length of UDP packet */ |
| u16 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 { |
| u16 ar_hrd; /* Format of hardware address */ |
| # define ARP_ETHER 1 /* Ethernet hardware address */ |
| u16 ar_pro; /* Format of protocol address */ |
| u8 ar_hln; /* Length of hardware address */ |
| # define ARP_HLEN 6 |
| u8 ar_pln; /* Length of protocol address */ |
| # define ARP_PLEN 4 |
| u16 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. |
| */ |
| u8 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 |
| u8 ar_sha[]; /* Sender hardware address */ |
| u8 ar_spa[]; /* Sender protocol address */ |
| u8 ar_tha[]; /* Target hardware address */ |
| u8 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 { |
| u8 type; |
| u8 code; |
| u16 checksum; |
| union { |
| struct { |
| u16 id; |
| u16 sequence; |
| } echo; |
| u32 gateway; |
| struct { |
| u16 unused; |
| u16 mtu; |
| } frag; |
| u8 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 2048 |
| #define PKTSIZE_ALIGN 2048 |
| /*#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 struct in_addr are stored in NETWORK byte order |
| * (big endian). |
| */ |
| |
| /* net.c */ |
| /** BOOTP EXTENTIONS **/ |
| extern struct in_addr net_gateway; /* Our gateway IP address */ |
| extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */ |
| /* Our Domain Name Server (0 = unknown) */ |
| extern struct in_addr net_dns_server; |
| #if defined(CONFIG_BOOTP_DNS2) |
| /* Our 2nd Domain Name Server (0 = unknown) */ |
| extern struct in_addr net_dns_server2; |
| #endif |
| extern char net_nis_domain[32]; /* Our IS domain */ |
| extern char net_hostname[32]; /* Our hostname */ |
| extern char net_root_path[64]; /* Our root path */ |
| /** END OF BOOTP EXTENTIONS **/ |
| extern u8 net_ethaddr[6]; /* Our ethernet address */ |
| extern u8 net_server_ethaddr[6]; /* Boot server enet address */ |
| extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */ |
| extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */ |
| extern uchar *net_tx_packet; /* THE transmit packet */ |
| extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ |
| extern uchar *net_rx_packet; /* Current receive packet */ |
| extern int net_rx_packet_len; /* Current rx packet length */ |
| extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */ |
| extern const u8 net_null_ethaddr[6]; |
| |
| #define VLAN_NONE 4095 /* untagged */ |
| #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ |
| extern ushort net_our_vlan; /* Our VLAN */ |
| extern ushort net_native_vlan; /* Our Native VLAN */ |
| |
| extern int net_restart_wrap; /* Tried all network devices */ |
| extern int tftp_our_port; |
| enum proto_t { |
| BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP, |
| TFTPSRV, TFTPPUT, LINKLOCAL |
| }; |
| |
| extern char net_boot_file_name[1024];/* Boot File name */ |
| /* The actual transferred size of the bootfile (in bytes) */ |
| extern u32 net_boot_file_size; |
| /* Boot file size in blocks as reported by the DHCP server */ |
| extern u32 net_boot_file_expected_size_in_blocks; |
| |
| #if defined(CONFIG_CMD_DNS) |
| extern char *net_dns_resolve; /* The host to resolve */ |
| extern char *net_dns_env_var; /* the env var to put the ip into */ |
| #endif |
| |
| #if defined(CONFIG_CMD_PING) |
| extern struct in_addr net_ping_ip; /* the ip address to ping */ |
| #endif |
| |
| #if defined(CONFIG_CMD_CDP) |
| /* when CDP completes these hold the return values */ |
| extern ushort cdp_native_vlan; /* CDP returned native VLAN */ |
| extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */ |
| |
| /* |
| * Check for a CDP packet by examining the received MAC address field |
| */ |
| static inline int is_cdp_packet(const uchar *ethaddr) |
| { |
| extern const u8 net_cdp_ethaddr[6]; |
| |
| return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0; |
| } |
| #endif |
| |
| #if defined(CONFIG_CMD_SNTP) |
| extern struct in_addr net_ntp_server; /* the ip address to NTP */ |
| extern int net_ntp_time_offset; /* offset time from UTC */ |
| #endif |
| |
| #if defined(CONFIG_MCAST_TFTP) |
| extern struct in_addr net_mcast_addr; |
| #endif |
| |
| /* Initialize the network adapter */ |
| void net_init(void); |
| int net_loop(enum proto_t); |
| |
| /* Load failed. Start again. */ |
| int net_start_again(void); |
| |
| /* Get size of the ethernet header when we send */ |
| int net_eth_hdr_size(void); |
| |
| /* Set ethernet header; returns the size of the header */ |
| int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot); |
| int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot); |
| |
| /* Set IP header */ |
| void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source); |
| void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, |
| int sport, int len); |
| |
| /** |
| * compute_ip_checksum() - Compute IP checksum |
| * |
| * @addr: Address to check (must be 16-bit aligned) |
| * @nbytes: Number of bytes to check (normally a multiple of 2) |
| * @return 16-bit IP checksum |
| */ |
| unsigned compute_ip_checksum(const void *addr, unsigned nbytes); |
| |
| /** |
| * add_ip_checksums() - add two IP checksums |
| * |
| * @offset: Offset of first sum (if odd we do a byte-swap) |
| * @sum: First checksum |
| * @new_sum: New checksum to add |
| * @return updated 16-bit IP checksum |
| */ |
| unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); |
| |
| /** |
| * ip_checksum_ok() - check if a checksum is correct |
| * |
| * This works by making sure the checksum sums to 0 |
| * |
| * @addr: Address to check (must be 16-bit aligned) |
| * @nbytes: Number of bytes to check (normally a multiple of 2) |
| * @return true if the checksum matches, false if not |
| */ |
| int ip_checksum_ok(const void *addr, unsigned nbytes); |
| |
| /* Callbacks */ |
| rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ |
| void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ |
| rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */ |
| void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */ |
| void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */ |
| void net_set_timeout_handler(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 net_send_packet(uchar *pkt, int len) |
| { |
| /* Currently no way to return errors from eth_send() */ |
| (void) eth_send(pkt, len); |
| } |
| |
| /* |
| * Transmit "net_tx_packet" 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 |
| */ |
| int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, |
| int sport, int payload_len); |
| |
| /* Processes a received packet */ |
| void net_process_received_packet(uchar *in_packet, int len); |
| |
| #ifdef CONFIG_NETCONSOLE |
| void nc_start(void); |
| int nc_input_packet(uchar *pkt, struct in_addr 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 struct in_addr net_read_ip(void *from) |
| { |
| struct in_addr ip; |
| |
| memcpy((void *)&ip, (void *)from, sizeof(ip)); |
| return ip; |
| } |
| |
| /* return ulong *in network byteorder* */ |
| static inline u32 net_read_u32(u32 *from) |
| { |
| u32 l; |
| |
| memcpy((void *)&l, (void *)from, sizeof(l)); |
| return l; |
| } |
| |
| /* write IP *in network byteorder* */ |
| static inline void net_write_ip(void *to, struct in_addr ip) |
| { |
| memcpy(to, (void *)&ip, sizeof(ip)); |
| } |
| |
| /* copy IP */ |
| static inline void net_copy_ip(void *to, void *from) |
| { |
| memcpy((void *)to, from, sizeof(struct in_addr)); |
| } |
| |
| /* copy ulong */ |
| static inline void net_copy_u32(u32 *to, u32 *from) |
| { |
| memcpy((void *)to, (void *)from, sizeof(u32)); |
| } |
| |
| /** |
| * is_zero_ethaddr - 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_ethaddr(const u8 *addr) |
| { |
| return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); |
| } |
| |
| /** |
| * is_multicast_ethaddr - 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_ethaddr(const u8 *addr) |
| { |
| return 0x01 & addr[0]; |
| } |
| |
| /* |
| * is_broadcast_ethaddr - 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_ethaddr(const u8 *addr) |
| { |
| return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == |
| 0xff; |
| } |
| |
| /* |
| * is_valid_ethaddr - 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_ethaddr(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_ethaddr(addr) && !is_zero_ethaddr(addr); |
| } |
| |
| /** |
| * net_random_ethaddr - 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 net_random_ethaddr(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 */ |
| void ip_to_string(struct in_addr x, char *s); |
| |
| /* Convert a string to ip address */ |
| struct in_addr string_to_ip(const char *s); |
| |
| /* Convert a VLAN id to a string */ |
| void vlan_to_string(ushort x, char *s); |
| |
| /* Convert a string to a vlan id */ |
| ushort string_to_vlan(const char *s); |
| |
| /* read a VLAN id from an environment variable */ |
| ushort getenv_vlan(char *); |
| |
| /* copy a filename (allow for "..." notation, limit length) */ |
| void copy_filename(char *dst, const char *src, int size); |
| |
| /* get a random source port */ |
| unsigned int random_port(void); |
| |
| /** |
| * update_tftp - Update firmware over TFTP (via DFU) |
| * |
| * This function updates board's firmware via TFTP |
| * |
| * @param addr - memory address where data is stored |
| * @param interface - the DFU medium name - e.g. "mmc" |
| * @param devstring - the DFU medium number - e.g. "1" |
| * |
| * @return - 0 on success, other value on failure |
| */ |
| int update_tftp(ulong addr, char *interface, char *devstring); |
| |
| /**********************************************************************/ |
| |
| #endif /* __NET_H__ */ |