/* * 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 #endif /* CONFIG_8xx */ #include #include /* 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 */ struct eth_pdata { phys_addr_t iobase; unsigned char enetaddr[6]; }; /** * 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 - 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, 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_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; } /* 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(char *name, uchar *enetaddr); 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. */ 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 { 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)) #define ETH_FCS_LEN 4 /* Octets in the FCS */ 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 */ 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 { 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 */ struct in_addr ip_src; /* Source IP address */ struct in_addr 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 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 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 struct in_addr net_ip; /* Our IP addr (0 = unknown) */ extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */ extern uchar *NetTxPacket; /* THE transmit packet */ #ifdef CONFIG_DM_ETH extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ #else extern uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ #endif 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 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 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 struct in_addr net_ntp_server; /* the ip address to NTP */ extern int NetTimeOffset; /* 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 NetLoop(enum proto_t); /* Shutdown adapters and cleanup */ void NetStop(void); /* Load failed. Start again. */ int NetStartAgain(void); /* Get size of the ethernet header when we send */ int NetEthHdrSize(void); /* Set ethernet header; returns the size of the header */ int NetSetEther(uchar *, uchar *, uint); 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 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) { /* Currently no way to return errors from eth_send() */ (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 */ int NetSendUDPPacket(uchar *ether, struct in_addr dest, int dport, int sport, int payload_len); #ifndef CONFIG_DM_ETH #define NetReceive(in_packet, len) net_process_received_packet(in_packet, len) #endif /* Processes a received packet */ void net_process_received_packet(uchar *in_packet, int len); #ifdef CONFIG_NETCONSOLE void NcStart(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 ulong NetReadLong(ulong *from) { ulong 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 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 */ 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 U-Boot over TFTP */ int update_tftp(ulong addr); /**********************************************************************/ #endif /* __NET_H__ */