1 /* SPDX-License-Identifier: GPL-2.0 */
3 * LiMon Monitor (LiMon) - Network.
5 * Copyright 1994 - 2000 Neil Russell.
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
12 #ifndef __NET_LEGACY_H__
13 #define __NET_LEGACY_H__
15 #include <linux/types.h>
16 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
19 #include <linux/if_ether.h>
25 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
26 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
27 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
28 #define DEBUG_INT_STATE 0 /* Internal network state changes */
30 /* ARP hardware address length */
33 * The size of a MAC address in string form, each digit requires two chars
34 * and five separator characters to form '00:00:00:00:00:00'.
36 #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
39 * An incoming packet handler.
40 * @param pkt pointer to the application packet
41 * @param dport destination UDP port
42 * @param sip source IP address
43 * @param sport source UDP port
44 * @param len packet length
46 typedef void rxhand_f(uchar *pkt, unsigned int dport,
47 struct in_addr sip, unsigned int sport,
51 * An incoming ICMP packet handler.
52 * @param type ICMP type
53 * @param code ICMP code
54 * @param dport destination UDP port
55 * @param sip source IP address
56 * @param sport source UDP port
57 * @param pkt pointer to the ICMP packet data
58 * @param len packet length
60 typedef void rxhand_icmp_f(unsigned type, unsigned int code, unsigned int dport,
61 struct in_addr sip, unsigned int sport, uchar *pkt,
65 * A timeout handler. Called after time interval has expired.
67 typedef void thand_f(void);
70 * The devname can be either an exact name given by the driver or device tree
71 * or it can be an alias of the form "eth%d"
73 struct udevice *eth_get_dev_by_name(const char *devname);
74 int eth_init_state_only(void); /* Set active state */
75 void eth_halt_state_only(void); /* Set passive state */
78 * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
80 * This sets up an environment variable with the given MAC address (@enetaddr).
81 * The environment variable to be set is defined by <@base_name><@index>addr.
82 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
85 * @base_name: Base name for variable, typically "eth"
86 * @index: Index of interface being updated (>=0)
87 * @enetaddr: Pointer to MAC address to put into the variable
88 * Return: 0 if OK, other value on error
90 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
94 * Get the hardware address for an ethernet interface .
96 * base_name - base name for device (normally "eth")
97 * index - device index number (0 for first)
98 * enetaddr - returns 6 byte hardware address
100 * Return true if the address is valid.
102 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
105 int eth_send(void *packet, int length); /* Send a packet */
107 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
108 int eth_receive(void *packet, int length); /* Receive a packet*/
109 extern void (*push_packet)(void *packet, int length);
111 int eth_mcast_join(struct in_addr mcast_addr, int join);
113 /**********************************************************************/
118 #define ETH_FCS_LEN 4 /* Octets in the FCS */
121 u8 et_dest[ARP_HLEN]; /* Destination node */
122 u8 et_src[ARP_HLEN]; /* Source node */
123 u16 et_protlen; /* Protocol or length */
124 u8 et_dsap; /* 802 DSAP */
125 u8 et_ssap; /* 802 SSAP */
126 u8 et_ctl; /* 802 control */
127 u8 et_snap1; /* SNAP */
130 u16 et_prot; /* 802 protocol */
133 /* 802 + SNAP + ethernet header size */
134 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
137 * Virtual LAN Ethernet header
139 struct vlan_ethernet_hdr {
140 u8 vet_dest[ARP_HLEN]; /* Destination node */
141 u8 vet_src[ARP_HLEN]; /* Source node */
142 u16 vet_vlan_type; /* PROT_VLAN */
143 u16 vet_tag; /* TAG of VLAN */
144 u16 vet_type; /* protocol type */
147 /* VLAN Ethernet header size */
148 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
151 * Internet Protocol (IP) header.
154 u8 ip_hl_v; /* header length and version */
155 u8 ip_tos; /* type of service */
156 u16 ip_len; /* total length */
157 u16 ip_id; /* identification */
158 u16 ip_off; /* fragment offset field */
159 u8 ip_ttl; /* time to live */
160 u8 ip_p; /* protocol */
161 u16 ip_sum; /* checksum */
162 struct in_addr ip_src; /* Source IP address */
163 struct in_addr ip_dst; /* Destination IP address */
166 #define IP_OFFS 0x1fff /* ip offset *= 8 */
167 #define IP_FLAGS 0xe000 /* first 3 bits */
168 #define IP_FLAGS_RES 0x8000 /* reserved */
169 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
170 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
172 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
174 #define IP_MIN_FRAG_DATAGRAM_SIZE (IP_HDR_SIZE + 8)
177 * Address Resolution Protocol (ARP) header.
180 u16 ar_hrd; /* Format of hardware address */
181 # define ARP_ETHER 1 /* Ethernet hardware address */
182 u16 ar_pro; /* Format of protocol address */
183 u8 ar_hln; /* Length of hardware address */
184 u8 ar_pln; /* Length of protocol address */
186 u16 ar_op; /* Operation */
187 # define ARPOP_REQUEST 1 /* Request to resolve address */
188 # define ARPOP_REPLY 2 /* Response to previous request */
190 # define RARPOP_REQUEST 3 /* Request to resolve address */
191 # define RARPOP_REPLY 4 /* Response to previous request */
194 * The remaining fields are variable in size, according to
195 * the sizes above, and are defined as appropriate for
196 * specific hardware/protocol combinations.
199 #define ar_sha ar_data[0]
200 #define ar_spa ar_data[ARP_HLEN]
201 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
202 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
204 u8 ar_sha[]; /* Sender hardware address */
205 u8 ar_spa[]; /* Sender protocol address */
206 u8 ar_tha[]; /* Target hardware address */
207 u8 ar_tpa[]; /* Target protocol address */
212 * ICMP stuff (just enough to handle (host) redirect messages)
214 #define ICMP_ECHO_REPLY 0 /* Echo reply */
215 #define ICMP_NOT_REACH 3 /* Detination unreachable */
216 #define ICMP_REDIRECT 5 /* Redirect (change route) */
217 #define ICMP_ECHO_REQUEST 8 /* Echo request */
219 /* Codes for REDIRECT. */
220 #define ICMP_REDIR_NET 0 /* Redirect Net */
221 #define ICMP_REDIR_HOST 1 /* Redirect Host */
223 /* Codes for NOT_REACH */
224 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
244 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
245 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
248 * Maximum packet size; used to allocate packet storage. Use
249 * the maximum Ethernet frame size as specified by the Ethernet
250 * standard including the 802.1Q tag (VLAN tagging).
251 * maximum packet size = 1522
252 * maximum packet size and multiple of 32 bytes = 1536
255 #ifndef CONFIG_DM_DSA
256 #define PKTSIZE_ALIGN 1536
258 /* Maximum DSA tagging overhead (headroom and/or tailroom) */
259 #define DSA_MAX_OVR 256
260 #define PKTSIZE_ALIGN (1536 + DSA_MAX_OVR)
263 /**********************************************************************/
269 * All variables of type struct in_addr are stored in NETWORK byte order
274 /** BOOTP EXTENTIONS **/
275 extern struct in_addr net_gateway; /* Our gateway IP address */
276 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
277 /* Our Domain Name Server (0 = unknown) */
278 extern struct in_addr net_dns_server;
279 #if defined(CONFIG_BOOTP_DNS2)
280 /* Our 2nd Domain Name Server (0 = unknown) */
281 extern struct in_addr net_dns_server2;
283 extern char net_nis_domain[32]; /* Our IS domain */
284 extern char net_hostname[32]; /* Our hostname */
286 extern char net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN]; /* Our root path */
288 /** END OF BOOTP EXTENTIONS **/
289 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
290 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
291 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
292 extern uchar *net_tx_packet; /* THE transmit packet */
293 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
294 extern uchar *net_rx_packet; /* Current receive packet */
295 extern int net_rx_packet_len; /* Current rx packet length */
296 extern const u8 net_null_ethaddr[ARP_HLEN];
298 #define VLAN_NONE 4095 /* untagged */
299 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
300 extern ushort net_our_vlan; /* Our VLAN */
301 extern ushort net_native_vlan; /* Our Native VLAN */
303 extern int net_restart_wrap; /* Tried all network devices */
306 BOOTP, RARP, ARP, TFTPGET, DHCP, DHCP6, PING, PING6, DNS, NFS, CDP,
307 NETCONS, SNTP, TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT_UDP, FASTBOOT_TCP,
308 WOL, UDP, NCSI, WGET, RS
311 /* Indicates whether the file name was specified on the command line */
312 extern bool net_boot_file_name_explicit;
313 /* The actual transferred size of the bootfile (in bytes) */
314 extern u32 net_boot_file_size;
315 /* Boot file size in blocks as reported by the DHCP server */
316 extern u32 net_boot_file_expected_size_in_blocks;
318 #if defined(CONFIG_CMD_DNS)
319 extern char *net_dns_resolve; /* The host to resolve */
320 extern char *net_dns_env_var; /* the env var to put the ip into */
323 #if defined(CONFIG_CMD_PING)
324 extern struct in_addr net_ping_ip; /* the ip address to ping */
327 #if defined(CONFIG_CMD_CDP)
328 /* when CDP completes these hold the return values */
329 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
330 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
333 * Check for a CDP packet by examining the received MAC address field
335 static inline int is_cdp_packet(const uchar *ethaddr)
337 extern const u8 net_cdp_ethaddr[ARP_HLEN];
339 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
343 #if defined(CONFIG_CMD_SNTP)
344 extern struct in_addr net_ntp_server; /* the ip address to NTP */
345 extern int net_ntp_time_offset; /* offset time from UTC */
348 int net_loop(enum proto_t);
350 /* Load failed. Start again. */
351 int net_start_again(void);
353 /* Get size of the ethernet header when we send */
354 int net_eth_hdr_size(void);
356 /* Set ethernet header; returns the size of the header */
357 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
358 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
361 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
362 u16 pkt_len, u8 proto);
363 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
367 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
368 void net_set_udp_handler(rxhand_f *f); /* Set UDP RX packet handler */
369 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
370 void net_set_arp_handler(rxhand_f *f); /* Set ARP RX packet handler */
371 bool arp_is_waiting(void); /* Waiting for ARP reply? */
372 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
373 void net_set_timeout_handler(ulong t, thand_f *f);/* Set timeout handler */
375 /* Network loop state */
376 enum net_loop_state {
383 extern enum net_loop_state net_state;
385 static inline void net_set_state(enum net_loop_state state)
387 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
392 * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
393 * sending an asynchronous reply
395 * returns - ptr to packet buffer
397 uchar * net_get_async_tx_pkt_buf(void);
400 * net_send_ip_packet() - Transmit "net_tx_packet" as UDP or TCP packet,
401 * send ARP request if needed (ether will be populated)
402 * @ether: Raw packet buffer
403 * @dest: IP address to send the datagram to
404 * @dport: Destination UDP port
405 * @sport: Source UDP port
406 * @payload_len: Length of data after the UDP header
407 * @action: TCP action to be performed
408 * @tcp_seq_num: TCP sequence number of this transmission
409 * @tcp_ack_num: TCP stream acknolegement number
411 * Return: 0 on success, other value on failure
413 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
414 int payload_len, int proto, u8 action, u32 tcp_seq_num,
417 * net_send_tcp_packet() - Transmit TCP packet.
418 * @payload_len: length of payload
419 * @dhost: Destination host
420 * @dport: Destination TCP port
421 * @sport: Source TCP port
422 * @action: TCP action to be performed
423 * @tcp_seq_num: TCP sequence number of this transmission
424 * @tcp_ack_num: TCP stream acknolegement number
426 * Return: 0 on success, other value on failure
428 int net_send_tcp_packet(int payload_len, struct in_addr dhost, int dport,
429 int sport, u8 action, u32 tcp_seq_num, u32 tcp_ack_num);
430 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
431 int sport, int payload_len);
433 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_XPL_BUILD)
435 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned int dest_port,
436 unsigned int src_port, unsigned int len);
439 static __always_inline int eth_is_on_demand_init(void)
441 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_XPL_BUILD)
442 extern enum proto_t net_loop_last_protocol;
444 return net_loop_last_protocol != NETCONS;
450 static inline void eth_set_last_protocol(int protocol)
452 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_XPL_BUILD)
453 extern enum proto_t net_loop_last_protocol;
455 net_loop_last_protocol = protocol;
460 * Check if autoload is enabled. If so, use either NFS or TFTP to download
463 void net_auto_load(void);
466 * The following functions are a bit ugly, but necessary to deal with
467 * alignment restrictions on ARM.
469 * We're using inline functions, which had the smallest memory
470 * footprint in our tests.
472 /* return IP *in network byteorder* */
473 static inline struct in_addr net_read_ip(void *from)
477 memcpy((void *)&ip, (void *)from, sizeof(ip));
481 /* return ulong *in network byteorder* */
482 static inline u32 net_read_u32(void *from)
486 memcpy((void *)&l, (void *)from, sizeof(l));
490 /* write IP *in network byteorder* */
491 static inline void net_write_ip(void *to, struct in_addr ip)
493 memcpy(to, (void *)&ip, sizeof(ip));
497 static inline void net_copy_ip(void *to, void *from)
499 memcpy((void *)to, from, sizeof(struct in_addr));
503 static inline void net_copy_u32(void *to, void *from)
505 memcpy((void *)to, (void *)from, sizeof(u32));
508 /* Convert an IP address to a string */
509 void ip_to_string(struct in_addr x, char *s);
512 * string_to_ip() - Convert a string to ip address
514 * Implemented in lib/net_utils.c (built unconditionally)
516 * @s: Input string to parse
517 * @return: in_addr struct containing the parsed IP address
519 struct in_addr string_to_ip(const char *s);
521 /* Convert a VLAN id to a string */
522 void vlan_to_string(ushort x, char *s);
524 /* Convert a string to a vlan id */
525 ushort string_to_vlan(const char *s);
527 /* read a VLAN id from an environment variable */
528 ushort env_get_vlan(char *var);
530 /* check if serverip is specified in filename from the command line */
531 int is_serverip_in_cmd(void);
534 * net_parse_bootfile - Parse the bootfile env var / cmd line param
536 * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
537 * @param filename - a pointer to the string to save the filename part
538 * @param max_len - The longest - 1 that the filename part can be
540 * return 1 if parsed, 0 if bootfile is empty
542 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
544 #endif /* __NET_LEGACY_H__ */