2 * Copied from Linux Monitor (LiMon) - Networking.
4 * Copyright 1994 - 2000 Neil Russell.
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
9 * SPDX-License-Identifier: GPL-2.0
15 * The user interface supports commands for BOOTP, RARP, and TFTP.
16 * Also, we support ARP internally. Depending on available data,
17 * these interact as follows:
21 * Prerequisites: - own ethernet address
22 * We want: - own IP address
23 * - TFTP server IP address
29 * Prerequisites: - own ethernet address
30 * We want: - own IP address
35 * Prerequisites: - own ethernet address
36 * We want: - own IP address
37 * - TFTP server IP address
42 * Prerequisites: - own ethernet address
44 * - TFTP server IP address
45 * We want: - TFTP server ethernet address
50 * Prerequisites: - own ethernet address
51 * We want: - IP, Netmask, ServerIP, Gateway IP
52 * - bootfilename, lease time
57 * Prerequisites: - own ethernet address
59 * - TFTP server IP address
60 * - TFTP server ethernet address
61 * - name of bootfile (if unknown, we use a default name
62 * derived from our own IP address)
63 * We want: - load the boot file
68 * Prerequisites: - own ethernet address
70 * - name of bootfile (if unknown, we use a default name
71 * derived from our own IP address)
72 * We want: - load the boot file
77 * Prerequisites: - own ethernet address
79 * We want: - network time
87 #include <environment.h>
91 #if defined(CONFIG_STATUS_LED)
93 #include <status_led.h>
96 #include <linux/compiler.h>
100 #if defined(CONFIG_CMD_DNS)
103 #include "link_local.h"
107 #if defined(CONFIG_CMD_SNTP)
111 DECLARE_GLOBAL_DATA_PTR
;
113 /** BOOTP EXTENTIONS **/
115 /* Our subnet mask (0=unknown) */
116 struct in_addr net_netmask
;
117 /* Our gateways IP address */
118 struct in_addr net_gateway
;
119 /* Our DNS IP address */
120 struct in_addr net_dns_server
;
121 #if defined(CONFIG_BOOTP_DNS2)
122 /* Our 2nd DNS IP address */
123 struct in_addr net_dns_server2
;
126 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
127 struct in_addr net_mcast_addr
;
130 /** END OF BOOTP EXTENTIONS **/
132 /* Our ethernet address */
134 /* Boot server enet address */
135 u8 net_server_ethaddr
[6];
136 /* Our IP addr (0 = unknown) */
137 struct in_addr net_ip
;
138 /* Server IP addr (0 = unknown) */
139 struct in_addr net_server_ip
;
140 /* Current receive packet */
141 uchar
*net_rx_packet
;
142 /* Current rx packet length */
143 int net_rx_packet_len
;
145 static unsigned net_ip_id
;
146 /* Ethernet bcast address */
147 const u8 net_bcast_ethaddr
[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
148 const u8 net_null_ethaddr
[6];
150 void (*push_packet
)(void *, int len
) = 0;
152 /* Network loop state */
153 enum net_loop_state net_state
;
154 /* Tried all network devices */
155 int net_restart_wrap
;
156 /* Network loop restarted */
157 static int net_restarted
;
158 /* At least one device configured */
159 static int net_dev_exists
;
161 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
162 /* default is without VLAN */
163 ushort net_our_vlan
= 0xFFFF;
165 ushort net_native_vlan
= 0xFFFF;
168 char net_boot_file_name
[1024];
169 /* The actual transferred size of the bootfile (in bytes) */
170 u32 net_boot_file_size
;
171 /* Boot file size in blocks as reported by the DHCP server */
172 u32 net_boot_file_expected_size_in_blocks
;
174 #if defined(CONFIG_CMD_SNTP)
175 /* NTP server IP address */
176 struct in_addr net_ntp_server
;
177 /* offset time from UTC */
178 int net_ntp_time_offset
;
181 static uchar net_pkt_buf
[(PKTBUFSRX
+1) * PKTSIZE_ALIGN
+ PKTALIGN
];
182 /* Receive packets */
183 uchar
*net_rx_packets
[PKTBUFSRX
];
184 /* Current UDP RX packet handler */
185 static rxhand_f
*udp_packet_handler
;
186 /* Current ARP RX packet handler */
187 static rxhand_f
*arp_packet_handler
;
188 #ifdef CONFIG_CMD_TFTPPUT
189 /* Current ICMP rx handler */
190 static rxhand_icmp_f
*packet_icmp_handler
;
192 /* Current timeout handler */
193 static thand_f
*time_handler
;
194 /* Time base value */
195 static ulong time_start
;
196 /* Current timeout value */
197 static ulong time_delta
;
198 /* THE transmit packet */
199 uchar
*net_tx_packet
;
201 static int net_check_prereq(enum proto_t protocol
);
203 static int net_try_count
;
205 int __maybe_unused net_busy_flag
;
207 /**********************************************************************/
209 static int on_bootfile(const char *name
, const char *value
, enum env_op op
,
212 if (flags
& H_PROGRAMMATIC
)
217 case env_op_overwrite
:
218 copy_filename(net_boot_file_name
, value
,
219 sizeof(net_boot_file_name
));
227 U_BOOT_ENV_CALLBACK(bootfile
, on_bootfile
);
229 static int on_ipaddr(const char *name
, const char *value
, enum env_op op
,
232 if (flags
& H_PROGRAMMATIC
)
235 net_ip
= string_to_ip(value
);
239 U_BOOT_ENV_CALLBACK(ipaddr
, on_ipaddr
);
241 static int on_gatewayip(const char *name
, const char *value
, enum env_op op
,
244 if (flags
& H_PROGRAMMATIC
)
247 net_gateway
= string_to_ip(value
);
251 U_BOOT_ENV_CALLBACK(gatewayip
, on_gatewayip
);
253 static int on_netmask(const char *name
, const char *value
, enum env_op op
,
256 if (flags
& H_PROGRAMMATIC
)
259 net_netmask
= string_to_ip(value
);
263 U_BOOT_ENV_CALLBACK(netmask
, on_netmask
);
265 static int on_serverip(const char *name
, const char *value
, enum env_op op
,
268 if (flags
& H_PROGRAMMATIC
)
271 net_server_ip
= string_to_ip(value
);
275 U_BOOT_ENV_CALLBACK(serverip
, on_serverip
);
277 static int on_nvlan(const char *name
, const char *value
, enum env_op op
,
280 if (flags
& H_PROGRAMMATIC
)
283 net_native_vlan
= string_to_vlan(value
);
287 U_BOOT_ENV_CALLBACK(nvlan
, on_nvlan
);
289 static int on_vlan(const char *name
, const char *value
, enum env_op op
,
292 if (flags
& H_PROGRAMMATIC
)
295 net_our_vlan
= string_to_vlan(value
);
299 U_BOOT_ENV_CALLBACK(vlan
, on_vlan
);
301 #if defined(CONFIG_CMD_DNS)
302 static int on_dnsip(const char *name
, const char *value
, enum env_op op
,
305 if (flags
& H_PROGRAMMATIC
)
308 net_dns_server
= string_to_ip(value
);
312 U_BOOT_ENV_CALLBACK(dnsip
, on_dnsip
);
316 * Check if autoload is enabled. If so, use either NFS or TFTP to download
319 void net_auto_load(void)
321 #if defined(CONFIG_CMD_NFS)
322 const char *s
= getenv("autoload");
324 if (s
!= NULL
&& strcmp(s
, "NFS") == 0) {
326 * Use NFS to load the bootfile.
332 if (getenv_yesno("autoload") == 0) {
334 * Just use BOOTP/RARP to configure system;
335 * Do not use TFTP to load the bootfile.
337 net_set_state(NETLOOP_SUCCESS
);
343 static void net_init_loop(void)
346 memcpy(net_ethaddr
, eth_get_ethaddr(), 6);
351 static void net_clear_handlers(void)
353 net_set_udp_handler(NULL
);
354 net_set_arp_handler(NULL
);
355 net_set_timeout_handler(0, NULL
);
358 static void net_cleanup_loop(void)
360 net_clear_handlers();
365 static int first_call
= 1;
369 * Setup packet buffers, aligned correctly.
373 net_tx_packet
= &net_pkt_buf
[0] + (PKTALIGN
- 1);
374 net_tx_packet
-= (ulong
)net_tx_packet
% PKTALIGN
;
375 for (i
= 0; i
< PKTBUFSRX
; i
++) {
376 net_rx_packets
[i
] = net_tx_packet
+
377 (i
+ 1) * PKTSIZE_ALIGN
;
380 net_clear_handlers();
382 /* Only need to setup buffer pointers once. */
389 /**********************************************************************/
391 * Main network processing loop.
394 int net_loop(enum proto_t protocol
)
401 debug_cond(DEBUG_INT_STATE
, "--- net_loop Entry\n");
403 bootstage_mark_name(BOOTSTAGE_ID_ETH_START
, "eth_start");
405 if (eth_is_on_demand_init() || protocol
!= NETCONS
) {
414 eth_init_state_only();
417 #ifdef CONFIG_USB_KEYBOARD
420 net_set_state(NETLOOP_CONTINUE
);
423 * Start the ball rolling with the given start function. From
424 * here on, this code is a state machine driven by received
425 * packets and timer events.
427 debug_cond(DEBUG_INT_STATE
, "--- net_loop Init\n");
430 switch (net_check_prereq(protocol
)) {
432 /* network not configured */
437 /* network device not configured */
442 net_boot_file_size
= 0;
445 #ifdef CONFIG_CMD_TFTPPUT
448 /* always use ARP to get server ethernet address */
449 tftp_start(protocol
);
451 #ifdef CONFIG_CMD_TFTPSRV
456 #if defined(CONFIG_CMD_DHCP)
460 dhcp_request(); /* Basically same as BOOTP */
470 #if defined(CONFIG_CMD_RARP)
477 #if defined(CONFIG_CMD_PING)
482 #if defined(CONFIG_CMD_NFS)
487 #if defined(CONFIG_CMD_CDP)
492 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
497 #if defined(CONFIG_CMD_SNTP)
502 #if defined(CONFIG_CMD_DNS)
507 #if defined(CONFIG_CMD_LINK_LOCAL)
519 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
520 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
521 defined(CONFIG_STATUS_LED) && \
522 defined(STATUS_LED_RED)
524 * Echo the inverted link state to the fault LED.
526 if (miiphy_link(eth_get_dev()->name
, CONFIG_SYS_FAULT_MII_ADDR
))
527 status_led_set(STATUS_LED_RED
, STATUS_LED_OFF
);
529 status_led_set(STATUS_LED_RED
, STATUS_LED_ON
);
530 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
531 #endif /* CONFIG_MII, ... */
532 #ifdef CONFIG_USB_KEYBOARD
537 * Main packet reception loop. Loop receiving packets until
538 * someone sets `net_state' to a state that terminates.
542 #ifdef CONFIG_SHOW_ACTIVITY
545 if (arp_timeout_check() > 0)
546 time_start
= get_timer(0);
549 * Check the ethernet for a new packet. The ethernet
550 * receive routine will process it.
551 * Most drivers return the most recent packet size, but not
552 * errors that may have happened.
557 * Abort if ctrl-c was pressed.
560 /* cancel any ARP that may not have completed */
561 net_arp_wait_packet_ip
.s_addr
= 0;
565 /* Invalidate the last protocol */
566 eth_set_last_protocol(BOOTP
);
569 /* include a debug print as well incase the debug
570 messages are directed to stderr */
571 debug_cond(DEBUG_INT_STATE
, "--- net_loop Abort!\n");
577 * Check for a timeout, and run the timeout handler
581 ((get_timer(0) - time_start
) > time_delta
)) {
584 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
585 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
586 defined(CONFIG_STATUS_LED) && \
587 defined(STATUS_LED_RED)
589 * Echo the inverted link state to the fault LED.
591 if (miiphy_link(eth_get_dev()->name
,
592 CONFIG_SYS_FAULT_MII_ADDR
))
593 status_led_set(STATUS_LED_RED
, STATUS_LED_OFF
);
595 status_led_set(STATUS_LED_RED
, STATUS_LED_ON
);
596 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
597 #endif /* CONFIG_MII, ... */
598 debug_cond(DEBUG_INT_STATE
, "--- net_loop timeout\n");
600 time_handler
= (thand_f
*)0;
604 if (net_state
== NETLOOP_FAIL
)
605 ret
= net_start_again();
608 case NETLOOP_RESTART
:
612 case NETLOOP_SUCCESS
:
614 if (net_boot_file_size
> 0) {
615 printf("Bytes transferred = %d (%x hex)\n",
616 net_boot_file_size
, net_boot_file_size
);
617 setenv_hex("filesize", net_boot_file_size
);
618 setenv_hex("fileaddr", load_addr
);
620 if (protocol
!= NETCONS
)
623 eth_halt_state_only();
625 eth_set_last_protocol(protocol
);
627 ret
= net_boot_file_size
;
628 debug_cond(DEBUG_INT_STATE
, "--- net_loop Success!\n");
633 /* Invalidate the last protocol */
634 eth_set_last_protocol(BOOTP
);
635 debug_cond(DEBUG_INT_STATE
, "--- net_loop Fail!\n");
638 case NETLOOP_CONTINUE
:
644 #ifdef CONFIG_USB_KEYBOARD
647 #ifdef CONFIG_CMD_TFTPPUT
648 /* Clear out the handlers */
649 net_set_udp_handler(NULL
);
650 net_set_icmp_handler(NULL
);
655 /**********************************************************************/
657 static void start_again_timeout_handler(void)
659 net_set_state(NETLOOP_RESTART
);
662 int net_start_again(void)
665 int retry_forever
= 0;
666 unsigned long retrycnt
= 0;
669 nretry
= getenv("netretry");
671 if (!strcmp(nretry
, "yes"))
673 else if (!strcmp(nretry
, "no"))
675 else if (!strcmp(nretry
, "once"))
678 retrycnt
= simple_strtoul(nretry
, NULL
, 0);
684 if ((!retry_forever
) && (net_try_count
>= retrycnt
)) {
686 net_set_state(NETLOOP_FAIL
);
688 * We don't provide a way for the protocol to return an error,
689 * but this is almost always the reason.
697 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
698 eth_try_another(!net_restarted
);
701 if (net_restart_wrap
) {
702 net_restart_wrap
= 0;
703 if (net_dev_exists
) {
704 net_set_timeout_handler(10000UL,
705 start_again_timeout_handler
);
706 net_set_udp_handler(NULL
);
708 net_set_state(NETLOOP_FAIL
);
711 net_set_state(NETLOOP_RESTART
);
716 /**********************************************************************/
721 static void dummy_handler(uchar
*pkt
, unsigned dport
,
722 struct in_addr sip
, unsigned sport
,
727 rxhand_f
*net_get_udp_handler(void)
729 return udp_packet_handler
;
732 void net_set_udp_handler(rxhand_f
*f
)
734 debug_cond(DEBUG_INT_STATE
, "--- net_loop UDP handler set (%p)\n", f
);
736 udp_packet_handler
= dummy_handler
;
738 udp_packet_handler
= f
;
741 rxhand_f
*net_get_arp_handler(void)
743 return arp_packet_handler
;
746 void net_set_arp_handler(rxhand_f
*f
)
748 debug_cond(DEBUG_INT_STATE
, "--- net_loop ARP handler set (%p)\n", f
);
750 arp_packet_handler
= dummy_handler
;
752 arp_packet_handler
= f
;
755 #ifdef CONFIG_CMD_TFTPPUT
756 void net_set_icmp_handler(rxhand_icmp_f
*f
)
758 packet_icmp_handler
= f
;
762 void net_set_timeout_handler(ulong iv
, thand_f
*f
)
765 debug_cond(DEBUG_INT_STATE
,
766 "--- net_loop timeout handler cancelled\n");
767 time_handler
= (thand_f
*)0;
769 debug_cond(DEBUG_INT_STATE
,
770 "--- net_loop timeout handler set (%p)\n", f
);
772 time_start
= get_timer(0);
773 time_delta
= iv
* CONFIG_SYS_HZ
/ 1000;
777 int net_send_udp_packet(uchar
*ether
, struct in_addr dest
, int dport
, int sport
,
784 /* make sure the net_tx_packet is initialized (net_init() was called) */
785 assert(net_tx_packet
!= NULL
);
786 if (net_tx_packet
== NULL
)
789 /* convert to new style broadcast */
790 if (dest
.s_addr
== 0)
791 dest
.s_addr
= 0xFFFFFFFF;
793 /* if broadcast, make the ether address a broadcast and don't do ARP */
794 if (dest
.s_addr
== 0xFFFFFFFF)
795 ether
= (uchar
*)net_bcast_ethaddr
;
797 pkt
= (uchar
*)net_tx_packet
;
799 eth_hdr_size
= net_set_ether(pkt
, ether
, PROT_IP
);
801 net_set_udp_header(pkt
, dest
, dport
, sport
, payload_len
);
802 pkt_hdr_size
= eth_hdr_size
+ IP_UDP_HDR_SIZE
;
804 /* if MAC address was not discovered yet, do an ARP request */
805 if (memcmp(ether
, net_null_ethaddr
, 6) == 0) {
806 debug_cond(DEBUG_DEV_PKT
, "sending ARP for %pI4\n", &dest
);
808 /* save the ip and eth addr for the packet to send after arp */
809 net_arp_wait_packet_ip
= dest
;
810 arp_wait_packet_ethaddr
= ether
;
812 /* size of the waiting packet */
813 arp_wait_tx_packet_size
= pkt_hdr_size
+ payload_len
;
815 /* and do the ARP request */
817 arp_wait_timer_start
= get_timer(0);
819 return 1; /* waiting */
821 debug_cond(DEBUG_DEV_PKT
, "sending UDP to %pI4/%pM\n",
823 net_send_packet(net_tx_packet
, pkt_hdr_size
+ payload_len
);
824 return 0; /* transmitted */
828 #ifdef CONFIG_IP_DEFRAG
830 * This function collects fragments in a single packet, according
831 * to the algorithm in RFC815. It returns NULL or the pointer to
832 * a complete packet, in static storage
834 #ifndef CONFIG_NET_MAXDEFRAG
835 #define CONFIG_NET_MAXDEFRAG 16384
838 * MAXDEFRAG, above, is chosen in the config file and is real data
839 * so we need to add the NFS overhead, which is more than TFTP.
840 * To use sizeof in the internal unnamed structures, we need a real
841 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
842 * The compiler doesn't complain nor allocates the actual structure
844 static struct rpc_t rpc_specimen
;
845 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
847 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
850 * this is the packet being assembled, either data or frag control.
851 * Fragments go by 8 bytes, so this union must be 8 bytes long
854 /* first_byte is address of this structure */
855 u16 last_byte
; /* last byte in this hole + 1 (begin of next hole) */
856 u16 next_hole
; /* index of next (in 8-b blocks), 0 == none */
857 u16 prev_hole
; /* index of prev, 0 == none */
861 static struct ip_udp_hdr
*__net_defragment(struct ip_udp_hdr
*ip
, int *lenp
)
863 static uchar pkt_buff
[IP_PKTSIZE
] __aligned(PKTALIGN
);
864 static u16 first_hole
, total_len
;
865 struct hole
*payload
, *thisfrag
, *h
, *newh
;
866 struct ip_udp_hdr
*localip
= (struct ip_udp_hdr
*)pkt_buff
;
867 uchar
*indata
= (uchar
*)ip
;
868 int offset8
, start
, len
, done
= 0;
869 u16 ip_off
= ntohs(ip
->ip_off
);
871 /* payload starts after IP header, this fragment is in there */
872 payload
= (struct hole
*)(pkt_buff
+ IP_HDR_SIZE
);
873 offset8
= (ip_off
& IP_OFFS
);
874 thisfrag
= payload
+ offset8
;
876 len
= ntohs(ip
->ip_len
) - IP_HDR_SIZE
;
878 if (start
+ len
> IP_MAXUDP
) /* fragment extends too far */
881 if (!total_len
|| localip
->ip_id
!= ip
->ip_id
) {
882 /* new (or different) packet, reset structs */
884 payload
[0].last_byte
= ~0;
885 payload
[0].next_hole
= 0;
886 payload
[0].prev_hole
= 0;
888 /* any IP header will work, copy the first we received */
889 memcpy(localip
, ip
, IP_HDR_SIZE
);
893 * What follows is the reassembly algorithm. We use the payload
894 * array as a linked list of hole descriptors, as each hole starts
895 * at a multiple of 8 bytes. However, last byte can be whatever value,
896 * so it is represented as byte count, not as 8-byte blocks.
899 h
= payload
+ first_hole
;
900 while (h
->last_byte
< start
) {
902 /* no hole that far away */
905 h
= payload
+ h
->next_hole
;
908 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
909 if (offset8
+ ((len
+ 7) / 8) <= h
- payload
) {
910 /* no overlap with holes (dup fragment?) */
914 if (!(ip_off
& IP_FLAGS_MFRAG
)) {
915 /* no more fragmentss: truncate this (last) hole */
916 total_len
= start
+ len
;
917 h
->last_byte
= start
+ len
;
921 * There is some overlap: fix the hole list. This code doesn't
922 * deal with a fragment that overlaps with two different holes
923 * (thus being a superset of a previously-received fragment).
926 if ((h
>= thisfrag
) && (h
->last_byte
<= start
+ len
)) {
927 /* complete overlap with hole: remove hole */
928 if (!h
->prev_hole
&& !h
->next_hole
) {
929 /* last remaining hole */
931 } else if (!h
->prev_hole
) {
933 first_hole
= h
->next_hole
;
934 payload
[h
->next_hole
].prev_hole
= 0;
935 } else if (!h
->next_hole
) {
937 payload
[h
->prev_hole
].next_hole
= 0;
939 /* in the middle of the list */
940 payload
[h
->next_hole
].prev_hole
= h
->prev_hole
;
941 payload
[h
->prev_hole
].next_hole
= h
->next_hole
;
944 } else if (h
->last_byte
<= start
+ len
) {
945 /* overlaps with final part of the hole: shorten this hole */
946 h
->last_byte
= start
;
948 } else if (h
>= thisfrag
) {
949 /* overlaps with initial part of the hole: move this hole */
950 newh
= thisfrag
+ (len
/ 8);
954 payload
[h
->next_hole
].prev_hole
= (h
- payload
);
956 payload
[h
->prev_hole
].next_hole
= (h
- payload
);
958 first_hole
= (h
- payload
);
961 /* fragment sits in the middle: split the hole */
962 newh
= thisfrag
+ (len
/ 8);
964 h
->last_byte
= start
;
965 h
->next_hole
= (newh
- payload
);
966 newh
->prev_hole
= (h
- payload
);
968 payload
[newh
->next_hole
].prev_hole
= (newh
- payload
);
971 /* finally copy this fragment and possibly return whole packet */
972 memcpy((uchar
*)thisfrag
, indata
+ IP_HDR_SIZE
, len
);
976 localip
->ip_len
= htons(total_len
);
977 *lenp
= total_len
+ IP_HDR_SIZE
;
981 static inline struct ip_udp_hdr
*net_defragment(struct ip_udp_hdr
*ip
,
984 u16 ip_off
= ntohs(ip
->ip_off
);
985 if (!(ip_off
& (IP_OFFS
| IP_FLAGS_MFRAG
)))
986 return ip
; /* not a fragment */
987 return __net_defragment(ip
, lenp
);
990 #else /* !CONFIG_IP_DEFRAG */
992 static inline struct ip_udp_hdr
*net_defragment(struct ip_udp_hdr
*ip
,
995 u16 ip_off
= ntohs(ip
->ip_off
);
996 if (!(ip_off
& (IP_OFFS
| IP_FLAGS_MFRAG
)))
997 return ip
; /* not a fragment */
1003 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1006 * @parma ip IP packet containing the ICMP
1008 static void receive_icmp(struct ip_udp_hdr
*ip
, int len
,
1009 struct in_addr src_ip
, struct ethernet_hdr
*et
)
1011 struct icmp_hdr
*icmph
= (struct icmp_hdr
*)&ip
->udp_src
;
1013 switch (icmph
->type
) {
1015 if (icmph
->code
!= ICMP_REDIR_HOST
)
1017 printf(" ICMP Host Redirect to %pI4 ",
1018 &icmph
->un
.gateway
);
1021 #if defined(CONFIG_CMD_PING)
1022 ping_receive(et
, ip
, len
);
1024 #ifdef CONFIG_CMD_TFTPPUT
1025 if (packet_icmp_handler
)
1026 packet_icmp_handler(icmph
->type
, icmph
->code
,
1027 ntohs(ip
->udp_dst
), src_ip
,
1028 ntohs(ip
->udp_src
), icmph
->un
.data
,
1029 ntohs(ip
->udp_len
));
1035 void net_process_received_packet(uchar
*in_packet
, int len
)
1037 struct ethernet_hdr
*et
;
1038 struct ip_udp_hdr
*ip
;
1039 struct in_addr dst_ip
;
1040 struct in_addr src_ip
;
1042 #if defined(CONFIG_CMD_CDP)
1045 ushort cti
= 0, vlanid
= VLAN_NONE
, myvlanid
, mynvlanid
;
1047 debug_cond(DEBUG_NET_PKT
, "packet received\n");
1049 net_rx_packet
= in_packet
;
1050 net_rx_packet_len
= len
;
1051 et
= (struct ethernet_hdr
*)in_packet
;
1053 /* too small packet? */
1054 if (len
< ETHER_HDR_SIZE
)
1059 (*push_packet
)(in_packet
, len
);
1064 #if defined(CONFIG_CMD_CDP)
1065 /* keep track if packet is CDP */
1066 iscdp
= is_cdp_packet(et
->et_dest
);
1069 myvlanid
= ntohs(net_our_vlan
);
1070 if (myvlanid
== (ushort
)-1)
1071 myvlanid
= VLAN_NONE
;
1072 mynvlanid
= ntohs(net_native_vlan
);
1073 if (mynvlanid
== (ushort
)-1)
1074 mynvlanid
= VLAN_NONE
;
1076 eth_proto
= ntohs(et
->et_protlen
);
1078 if (eth_proto
< 1514) {
1079 struct e802_hdr
*et802
= (struct e802_hdr
*)et
;
1081 * Got a 802.2 packet. Check the other protocol field.
1082 * XXX VLAN over 802.2+SNAP not implemented!
1084 eth_proto
= ntohs(et802
->et_prot
);
1086 ip
= (struct ip_udp_hdr
*)(in_packet
+ E802_HDR_SIZE
);
1087 len
-= E802_HDR_SIZE
;
1089 } else if (eth_proto
!= PROT_VLAN
) { /* normal packet */
1090 ip
= (struct ip_udp_hdr
*)(in_packet
+ ETHER_HDR_SIZE
);
1091 len
-= ETHER_HDR_SIZE
;
1093 } else { /* VLAN packet */
1094 struct vlan_ethernet_hdr
*vet
=
1095 (struct vlan_ethernet_hdr
*)et
;
1097 debug_cond(DEBUG_NET_PKT
, "VLAN packet received\n");
1099 /* too small packet? */
1100 if (len
< VLAN_ETHER_HDR_SIZE
)
1103 /* if no VLAN active */
1104 if ((ntohs(net_our_vlan
) & VLAN_IDMASK
) == VLAN_NONE
1105 #if defined(CONFIG_CMD_CDP)
1111 cti
= ntohs(vet
->vet_tag
);
1112 vlanid
= cti
& VLAN_IDMASK
;
1113 eth_proto
= ntohs(vet
->vet_type
);
1115 ip
= (struct ip_udp_hdr
*)(in_packet
+ VLAN_ETHER_HDR_SIZE
);
1116 len
-= VLAN_ETHER_HDR_SIZE
;
1119 debug_cond(DEBUG_NET_PKT
, "Receive from protocol 0x%x\n", eth_proto
);
1121 #if defined(CONFIG_CMD_CDP)
1123 cdp_receive((uchar
*)ip
, len
);
1128 if ((myvlanid
& VLAN_IDMASK
) != VLAN_NONE
) {
1129 if (vlanid
== VLAN_NONE
)
1130 vlanid
= (mynvlanid
& VLAN_IDMASK
);
1132 if (vlanid
!= (myvlanid
& VLAN_IDMASK
))
1136 switch (eth_proto
) {
1138 arp_receive(et
, ip
, len
);
1141 #ifdef CONFIG_CMD_RARP
1143 rarp_receive(ip
, len
);
1147 debug_cond(DEBUG_NET_PKT
, "Got IP\n");
1148 /* Before we start poking the header, make sure it is there */
1149 if (len
< IP_UDP_HDR_SIZE
) {
1150 debug("len bad %d < %lu\n", len
,
1151 (ulong
)IP_UDP_HDR_SIZE
);
1154 /* Check the packet length */
1155 if (len
< ntohs(ip
->ip_len
)) {
1156 debug("len bad %d < %d\n", len
, ntohs(ip
->ip_len
));
1159 len
= ntohs(ip
->ip_len
);
1160 debug_cond(DEBUG_NET_PKT
, "len=%d, v=%02x\n",
1161 len
, ip
->ip_hl_v
& 0xff);
1163 /* Can't deal with anything except IPv4 */
1164 if ((ip
->ip_hl_v
& 0xf0) != 0x40)
1166 /* Can't deal with IP options (headers != 20 bytes) */
1167 if ((ip
->ip_hl_v
& 0x0f) > 0x05)
1169 /* Check the Checksum of the header */
1170 if (!ip_checksum_ok((uchar
*)ip
, IP_HDR_SIZE
)) {
1171 debug("checksum bad\n");
1174 /* If it is not for us, ignore it */
1175 dst_ip
= net_read_ip(&ip
->ip_dst
);
1176 if (net_ip
.s_addr
&& dst_ip
.s_addr
!= net_ip
.s_addr
&&
1177 dst_ip
.s_addr
!= 0xFFFFFFFF) {
1178 #ifdef CONFIG_MCAST_TFTP
1179 if (net_mcast_addr
!= dst_ip
)
1183 /* Read source IP address for later use */
1184 src_ip
= net_read_ip(&ip
->ip_src
);
1186 * The function returns the unchanged packet if it's not
1187 * a fragment, and either the complete packet or NULL if
1188 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1190 ip
= net_defragment(ip
, &len
);
1194 * watch for ICMP host redirects
1196 * There is no real handler code (yet). We just watch
1197 * for ICMP host redirect messages. In case anybody
1198 * sees these messages: please contact me
1199 * (wd@denx.de), or - even better - send me the
1200 * necessary fixes :-)
1202 * Note: in all cases where I have seen this so far
1203 * it was a problem with the router configuration,
1204 * for instance when a router was configured in the
1205 * BOOTP reply, but the TFTP server was on the same
1206 * subnet. So this is probably a warning that your
1207 * configuration might be wrong. But I'm not really
1208 * sure if there aren't any other situations.
1210 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1211 * we send a tftp packet to a dead connection, or when
1212 * there is no server at the other end.
1214 if (ip
->ip_p
== IPPROTO_ICMP
) {
1215 receive_icmp(ip
, len
, src_ip
, et
);
1217 } else if (ip
->ip_p
!= IPPROTO_UDP
) { /* Only UDP packets */
1221 debug_cond(DEBUG_DEV_PKT
,
1222 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1223 &dst_ip
, &src_ip
, len
);
1225 #ifdef CONFIG_UDP_CHECKSUM
1226 if (ip
->udp_xsum
!= 0) {
1232 xsum
+= (ntohs(ip
->udp_len
));
1233 xsum
+= (ntohl(ip
->ip_src
.s_addr
) >> 16) & 0x0000ffff;
1234 xsum
+= (ntohl(ip
->ip_src
.s_addr
) >> 0) & 0x0000ffff;
1235 xsum
+= (ntohl(ip
->ip_dst
.s_addr
) >> 16) & 0x0000ffff;
1236 xsum
+= (ntohl(ip
->ip_dst
.s_addr
) >> 0) & 0x0000ffff;
1238 sumlen
= ntohs(ip
->udp_len
);
1239 sumptr
= (ushort
*)&(ip
->udp_src
);
1241 while (sumlen
> 1) {
1244 sumdata
= *sumptr
++;
1245 xsum
+= ntohs(sumdata
);
1251 sumdata
= *(unsigned char *)sumptr
;
1252 sumdata
= (sumdata
<< 8) & 0xff00;
1255 while ((xsum
>> 16) != 0) {
1256 xsum
= (xsum
& 0x0000ffff) +
1257 ((xsum
>> 16) & 0x0000ffff);
1259 if ((xsum
!= 0x00000000) && (xsum
!= 0x0000ffff)) {
1260 printf(" UDP wrong checksum %08lx %08x\n",
1261 xsum
, ntohs(ip
->udp_xsum
));
1267 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1268 nc_input_packet((uchar
*)ip
+ IP_UDP_HDR_SIZE
,
1272 ntohs(ip
->udp_len
) - UDP_HDR_SIZE
);
1275 * IP header OK. Pass the packet to the current handler.
1277 (*udp_packet_handler
)((uchar
*)ip
+ IP_UDP_HDR_SIZE
,
1281 ntohs(ip
->udp_len
) - UDP_HDR_SIZE
);
1286 /**********************************************************************/
1288 static int net_check_prereq(enum proto_t protocol
)
1292 #if defined(CONFIG_CMD_PING)
1294 if (net_ping_ip
.s_addr
== 0) {
1295 puts("*** ERROR: ping address not given\n");
1300 #if defined(CONFIG_CMD_SNTP)
1302 if (net_ntp_server
.s_addr
== 0) {
1303 puts("*** ERROR: NTP server address not given\n");
1308 #if defined(CONFIG_CMD_DNS)
1310 if (net_dns_server
.s_addr
== 0) {
1311 puts("*** ERROR: DNS server address not given\n");
1316 #if defined(CONFIG_CMD_NFS)
1322 if (net_server_ip
.s_addr
== 0) {
1323 puts("*** ERROR: `serverip' not set\n");
1326 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1327 defined(CONFIG_CMD_DNS)
1334 if (net_ip
.s_addr
== 0) {
1335 puts("*** ERROR: `ipaddr' not set\n");
1340 #ifdef CONFIG_CMD_RARP
1347 if (memcmp(net_ethaddr
, "\0\0\0\0\0\0", 6) == 0) {
1348 int num
= eth_get_dev_index();
1352 puts("*** ERROR: No ethernet found.\n");
1355 puts("*** ERROR: `ethaddr' not set\n");
1358 printf("*** ERROR: `eth%daddr' not set\n",
1372 /**********************************************************************/
1375 net_eth_hdr_size(void)
1379 myvlanid
= ntohs(net_our_vlan
);
1380 if (myvlanid
== (ushort
)-1)
1381 myvlanid
= VLAN_NONE
;
1383 return ((myvlanid
& VLAN_IDMASK
) == VLAN_NONE
) ? ETHER_HDR_SIZE
:
1384 VLAN_ETHER_HDR_SIZE
;
1387 int net_set_ether(uchar
*xet
, const uchar
*dest_ethaddr
, uint prot
)
1389 struct ethernet_hdr
*et
= (struct ethernet_hdr
*)xet
;
1392 myvlanid
= ntohs(net_our_vlan
);
1393 if (myvlanid
== (ushort
)-1)
1394 myvlanid
= VLAN_NONE
;
1396 memcpy(et
->et_dest
, dest_ethaddr
, 6);
1397 memcpy(et
->et_src
, net_ethaddr
, 6);
1398 if ((myvlanid
& VLAN_IDMASK
) == VLAN_NONE
) {
1399 et
->et_protlen
= htons(prot
);
1400 return ETHER_HDR_SIZE
;
1402 struct vlan_ethernet_hdr
*vet
=
1403 (struct vlan_ethernet_hdr
*)xet
;
1405 vet
->vet_vlan_type
= htons(PROT_VLAN
);
1406 vet
->vet_tag
= htons((0 << 5) | (myvlanid
& VLAN_IDMASK
));
1407 vet
->vet_type
= htons(prot
);
1408 return VLAN_ETHER_HDR_SIZE
;
1412 int net_update_ether(struct ethernet_hdr
*et
, uchar
*addr
, uint prot
)
1416 memcpy(et
->et_dest
, addr
, 6);
1417 memcpy(et
->et_src
, net_ethaddr
, 6);
1418 protlen
= ntohs(et
->et_protlen
);
1419 if (protlen
== PROT_VLAN
) {
1420 struct vlan_ethernet_hdr
*vet
=
1421 (struct vlan_ethernet_hdr
*)et
;
1422 vet
->vet_type
= htons(prot
);
1423 return VLAN_ETHER_HDR_SIZE
;
1424 } else if (protlen
> 1514) {
1425 et
->et_protlen
= htons(prot
);
1426 return ETHER_HDR_SIZE
;
1429 struct e802_hdr
*et802
= (struct e802_hdr
*)et
;
1430 et802
->et_prot
= htons(prot
);
1431 return E802_HDR_SIZE
;
1435 void net_set_ip_header(uchar
*pkt
, struct in_addr dest
, struct in_addr source
)
1437 struct ip_udp_hdr
*ip
= (struct ip_udp_hdr
*)pkt
;
1440 * Construct an IP header.
1442 /* IP_HDR_SIZE / 4 (not including UDP) */
1445 ip
->ip_len
= htons(IP_HDR_SIZE
);
1446 ip
->ip_id
= htons(net_ip_id
++);
1447 ip
->ip_off
= htons(IP_FLAGS_DFRAG
); /* Don't fragment */
1450 /* already in network byte order */
1451 net_copy_ip((void *)&ip
->ip_src
, &source
);
1452 /* already in network byte order */
1453 net_copy_ip((void *)&ip
->ip_dst
, &dest
);
1456 void net_set_udp_header(uchar
*pkt
, struct in_addr dest
, int dport
, int sport
,
1459 struct ip_udp_hdr
*ip
= (struct ip_udp_hdr
*)pkt
;
1462 * If the data is an odd number of bytes, zero the
1463 * byte after the last byte so that the checksum
1467 pkt
[IP_UDP_HDR_SIZE
+ len
] = 0;
1469 net_set_ip_header(pkt
, dest
, net_ip
);
1470 ip
->ip_len
= htons(IP_UDP_HDR_SIZE
+ len
);
1471 ip
->ip_p
= IPPROTO_UDP
;
1472 ip
->ip_sum
= compute_ip_checksum(ip
, IP_HDR_SIZE
);
1474 ip
->udp_src
= htons(sport
);
1475 ip
->udp_dst
= htons(dport
);
1476 ip
->udp_len
= htons(UDP_HDR_SIZE
+ len
);
1480 void copy_filename(char *dst
, const char *src
, int size
)
1482 if (*src
&& (*src
== '"')) {
1487 while ((--size
> 0) && *src
&& (*src
!= '"'))
1492 #if defined(CONFIG_CMD_NFS) || \
1493 defined(CONFIG_CMD_SNTP) || \
1494 defined(CONFIG_CMD_DNS)
1496 * make port a little random (1024-17407)
1497 * This keeps the math somewhat trivial to compute, and seems to work with
1498 * all supported protocols/clients/servers
1500 unsigned int random_port(void)
1502 return 1024 + (get_timer(0) % 0x4000);
1506 void ip_to_string(struct in_addr x
, char *s
)
1508 x
.s_addr
= ntohl(x
.s_addr
);
1509 sprintf(s
, "%d.%d.%d.%d",
1510 (int) ((x
.s_addr
>> 24) & 0xff),
1511 (int) ((x
.s_addr
>> 16) & 0xff),
1512 (int) ((x
.s_addr
>> 8) & 0xff),
1513 (int) ((x
.s_addr
>> 0) & 0xff)
1517 void vlan_to_string(ushort x
, char *s
)
1521 if (x
== (ushort
)-1)
1527 sprintf(s
, "%d", x
& VLAN_IDMASK
);
1530 ushort
string_to_vlan(const char *s
)
1535 return htons(VLAN_NONE
);
1537 if (*s
< '0' || *s
> '9')
1540 id
= (ushort
)simple_strtoul(s
, NULL
, 10);
1545 ushort
getenv_vlan(char *var
)
1547 return string_to_vlan(getenv(var
));