1 // SPDX-License-Identifier: GPL-2.0
3 * Copied from Linux Monitor (LiMon) - Networking.
5 * Copyright 1994 - 2000 Neil Russell.
7 * Copyright 2000 Roland Borde
8 * Copyright 2000 Paolo Scaffardi
9 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
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
84 * Prerequisites: - own ethernet address
85 * We want: - magic packet or timeout
93 #include <environment.h>
96 #include <net/fastboot.h>
98 #if defined(CONFIG_LED_STATUS)
100 #include <status_led.h>
102 #include <watchdog.h>
103 #include <linux/compiler.h>
107 #if defined(CONFIG_CMD_DNS)
110 #include "link_local.h"
114 #if defined(CONFIG_CMD_SNTP)
117 #if defined(CONFIG_CMD_WOL)
121 /** BOOTP EXTENTIONS **/
123 /* Our subnet mask (0=unknown) */
124 struct in_addr net_netmask
;
125 /* Our gateways IP address */
126 struct in_addr net_gateway
;
127 /* Our DNS IP address */
128 struct in_addr net_dns_server
;
129 #if defined(CONFIG_BOOTP_DNS2)
130 /* Our 2nd DNS IP address */
131 struct in_addr net_dns_server2
;
134 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
135 struct in_addr net_mcast_addr
;
138 /** END OF BOOTP EXTENTIONS **/
140 /* Our ethernet address */
142 /* Boot server enet address */
143 u8 net_server_ethaddr
[6];
144 /* Our IP addr (0 = unknown) */
145 struct in_addr net_ip
;
146 /* Server IP addr (0 = unknown) */
147 struct in_addr net_server_ip
;
148 /* Current receive packet */
149 uchar
*net_rx_packet
;
150 /* Current rx packet length */
151 int net_rx_packet_len
;
153 static unsigned net_ip_id
;
154 /* Ethernet bcast address */
155 const u8 net_bcast_ethaddr
[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
156 const u8 net_null_ethaddr
[6];
157 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
158 void (*push_packet
)(void *, int len
) = 0;
160 /* Network loop state */
161 enum net_loop_state net_state
;
162 /* Tried all network devices */
163 int net_restart_wrap
;
164 /* Network loop restarted */
165 static int net_restarted
;
166 /* At least one device configured */
167 static int net_dev_exists
;
169 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
170 /* default is without VLAN */
171 ushort net_our_vlan
= 0xFFFF;
173 ushort net_native_vlan
= 0xFFFF;
176 char net_boot_file_name
[1024];
177 /* Indicates whether the file name was specified on the command line */
178 bool net_boot_file_name_explicit
;
179 /* The actual transferred size of the bootfile (in bytes) */
180 u32 net_boot_file_size
;
181 /* Boot file size in blocks as reported by the DHCP server */
182 u32 net_boot_file_expected_size_in_blocks
;
184 #if defined(CONFIG_CMD_SNTP)
185 /* NTP server IP address */
186 struct in_addr net_ntp_server
;
187 /* offset time from UTC */
188 int net_ntp_time_offset
;
191 static uchar net_pkt_buf
[(PKTBUFSRX
+1) * PKTSIZE_ALIGN
+ PKTALIGN
];
192 /* Receive packets */
193 uchar
*net_rx_packets
[PKTBUFSRX
];
194 /* Current UDP RX packet handler */
195 static rxhand_f
*udp_packet_handler
;
196 /* Current ARP RX packet handler */
197 static rxhand_f
*arp_packet_handler
;
198 #ifdef CONFIG_CMD_TFTPPUT
199 /* Current ICMP rx handler */
200 static rxhand_icmp_f
*packet_icmp_handler
;
202 /* Current timeout handler */
203 static thand_f
*time_handler
;
204 /* Time base value */
205 static ulong time_start
;
206 /* Current timeout value */
207 static ulong time_delta
;
208 /* THE transmit packet */
209 uchar
*net_tx_packet
;
211 static int net_check_prereq(enum proto_t protocol
);
213 static int net_try_count
;
215 int __maybe_unused net_busy_flag
;
217 /**********************************************************************/
219 static int on_ipaddr(const char *name
, const char *value
, enum env_op op
,
222 if (flags
& H_PROGRAMMATIC
)
225 net_ip
= string_to_ip(value
);
229 U_BOOT_ENV_CALLBACK(ipaddr
, on_ipaddr
);
231 static int on_gatewayip(const char *name
, const char *value
, enum env_op op
,
234 if (flags
& H_PROGRAMMATIC
)
237 net_gateway
= string_to_ip(value
);
241 U_BOOT_ENV_CALLBACK(gatewayip
, on_gatewayip
);
243 static int on_netmask(const char *name
, const char *value
, enum env_op op
,
246 if (flags
& H_PROGRAMMATIC
)
249 net_netmask
= string_to_ip(value
);
253 U_BOOT_ENV_CALLBACK(netmask
, on_netmask
);
255 static int on_serverip(const char *name
, const char *value
, enum env_op op
,
258 if (flags
& H_PROGRAMMATIC
)
261 net_server_ip
= string_to_ip(value
);
265 U_BOOT_ENV_CALLBACK(serverip
, on_serverip
);
267 static int on_nvlan(const char *name
, const char *value
, enum env_op op
,
270 if (flags
& H_PROGRAMMATIC
)
273 net_native_vlan
= string_to_vlan(value
);
277 U_BOOT_ENV_CALLBACK(nvlan
, on_nvlan
);
279 static int on_vlan(const char *name
, const char *value
, enum env_op op
,
282 if (flags
& H_PROGRAMMATIC
)
285 net_our_vlan
= string_to_vlan(value
);
289 U_BOOT_ENV_CALLBACK(vlan
, on_vlan
);
291 #if defined(CONFIG_CMD_DNS)
292 static int on_dnsip(const char *name
, const char *value
, enum env_op op
,
295 if (flags
& H_PROGRAMMATIC
)
298 net_dns_server
= string_to_ip(value
);
302 U_BOOT_ENV_CALLBACK(dnsip
, on_dnsip
);
306 * Check if autoload is enabled. If so, use either NFS or TFTP to download
309 void net_auto_load(void)
311 #if defined(CONFIG_CMD_NFS)
312 const char *s
= env_get("autoload");
314 if (s
!= NULL
&& strcmp(s
, "NFS") == 0) {
315 if (net_check_prereq(NFS
)) {
316 /* We aren't expecting to get a serverip, so just accept the assigned IP */
317 #ifdef CONFIG_BOOTP_SERVERIP
318 net_set_state(NETLOOP_SUCCESS
);
320 printf("Cannot autoload with NFS\n");
321 net_set_state(NETLOOP_FAIL
);
326 * Use NFS to load the bootfile.
332 if (env_get_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
);
340 if (net_check_prereq(TFTPGET
)) {
341 /* We aren't expecting to get a serverip, so just accept the assigned IP */
342 #ifdef CONFIG_BOOTP_SERVERIP
343 net_set_state(NETLOOP_SUCCESS
);
345 printf("Cannot autoload with TFTPGET\n");
346 net_set_state(NETLOOP_FAIL
);
353 static void net_init_loop(void)
356 memcpy(net_ethaddr
, eth_get_ethaddr(), 6);
361 static void net_clear_handlers(void)
363 net_set_udp_handler(NULL
);
364 net_set_arp_handler(NULL
);
365 net_set_timeout_handler(0, NULL
);
368 static void net_cleanup_loop(void)
370 net_clear_handlers();
375 static int first_call
= 1;
379 * Setup packet buffers, aligned correctly.
383 net_tx_packet
= &net_pkt_buf
[0] + (PKTALIGN
- 1);
384 net_tx_packet
-= (ulong
)net_tx_packet
% PKTALIGN
;
385 for (i
= 0; i
< PKTBUFSRX
; i
++) {
386 net_rx_packets
[i
] = net_tx_packet
+
387 (i
+ 1) * PKTSIZE_ALIGN
;
390 net_clear_handlers();
392 /* Only need to setup buffer pointers once. */
399 /**********************************************************************/
401 * Main network processing loop.
404 int net_loop(enum proto_t protocol
)
407 enum net_loop_state prev_net_state
= net_state
;
412 debug_cond(DEBUG_INT_STATE
, "--- net_loop Entry\n");
414 bootstage_mark_name(BOOTSTAGE_ID_ETH_START
, "eth_start");
416 if (eth_is_on_demand_init() || protocol
!= NETCONS
) {
425 eth_init_state_only();
428 #ifdef CONFIG_USB_KEYBOARD
431 net_set_state(NETLOOP_CONTINUE
);
434 * Start the ball rolling with the given start function. From
435 * here on, this code is a state machine driven by received
436 * packets and timer events.
438 debug_cond(DEBUG_INT_STATE
, "--- net_loop Init\n");
441 switch (net_check_prereq(protocol
)) {
443 /* network not configured */
445 net_set_state(prev_net_state
);
449 /* network device not configured */
454 net_boot_file_size
= 0;
457 #ifdef CONFIG_CMD_TFTPPUT
460 /* always use ARP to get server ethernet address */
461 tftp_start(protocol
);
463 #ifdef CONFIG_CMD_TFTPSRV
468 #ifdef CONFIG_UDP_FUNCTION_FASTBOOT
470 fastboot_start_server();
473 #if defined(CONFIG_CMD_DHCP)
477 dhcp_request(); /* Basically same as BOOTP */
487 #if defined(CONFIG_CMD_RARP)
494 #if defined(CONFIG_CMD_PING)
499 #if defined(CONFIG_CMD_NFS)
504 #if defined(CONFIG_CMD_CDP)
509 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
514 #if defined(CONFIG_CMD_SNTP)
519 #if defined(CONFIG_CMD_DNS)
524 #if defined(CONFIG_CMD_LINK_LOCAL)
529 #if defined(CONFIG_CMD_WOL)
541 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
542 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
543 defined(CONFIG_LED_STATUS) && \
544 defined(CONFIG_LED_STATUS_RED)
546 * Echo the inverted link state to the fault LED.
548 if (miiphy_link(eth_get_dev()->name
, CONFIG_SYS_FAULT_MII_ADDR
))
549 status_led_set(CONFIG_LED_STATUS_RED
, CONFIG_LED_STATUS_OFF
);
551 status_led_set(CONFIG_LED_STATUS_RED
, CONFIG_LED_STATUS_ON
);
552 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
553 #endif /* CONFIG_MII, ... */
554 #ifdef CONFIG_USB_KEYBOARD
559 * Main packet reception loop. Loop receiving packets until
560 * someone sets `net_state' to a state that terminates.
564 #ifdef CONFIG_SHOW_ACTIVITY
567 if (arp_timeout_check() > 0)
568 time_start
= get_timer(0);
571 * Check the ethernet for a new packet. The ethernet
572 * receive routine will process it.
573 * Most drivers return the most recent packet size, but not
574 * errors that may have happened.
579 * Abort if ctrl-c was pressed.
582 /* cancel any ARP that may not have completed */
583 net_arp_wait_packet_ip
.s_addr
= 0;
587 /* Invalidate the last protocol */
588 eth_set_last_protocol(BOOTP
);
591 /* include a debug print as well incase the debug
592 messages are directed to stderr */
593 debug_cond(DEBUG_INT_STATE
, "--- net_loop Abort!\n");
599 * Check for a timeout, and run the timeout handler
603 ((get_timer(0) - time_start
) > time_delta
)) {
606 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
607 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
608 defined(CONFIG_LED_STATUS) && \
609 defined(CONFIG_LED_STATUS_RED)
611 * Echo the inverted link state to the fault LED.
613 if (miiphy_link(eth_get_dev()->name
,
614 CONFIG_SYS_FAULT_MII_ADDR
))
615 status_led_set(CONFIG_LED_STATUS_RED
,
616 CONFIG_LED_STATUS_OFF
);
618 status_led_set(CONFIG_LED_STATUS_RED
,
619 CONFIG_LED_STATUS_ON
);
620 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
621 #endif /* CONFIG_MII, ... */
622 debug_cond(DEBUG_INT_STATE
, "--- net_loop timeout\n");
624 time_handler
= (thand_f
*)0;
628 if (net_state
== NETLOOP_FAIL
)
629 ret
= net_start_again();
632 case NETLOOP_RESTART
:
636 case NETLOOP_SUCCESS
:
638 if (net_boot_file_size
> 0) {
639 printf("Bytes transferred = %d (%x hex)\n",
640 net_boot_file_size
, net_boot_file_size
);
641 env_set_hex("filesize", net_boot_file_size
);
642 env_set_hex("fileaddr", load_addr
);
644 if (protocol
!= NETCONS
)
647 eth_halt_state_only();
649 eth_set_last_protocol(protocol
);
651 ret
= net_boot_file_size
;
652 debug_cond(DEBUG_INT_STATE
, "--- net_loop Success!\n");
657 /* Invalidate the last protocol */
658 eth_set_last_protocol(BOOTP
);
659 debug_cond(DEBUG_INT_STATE
, "--- net_loop Fail!\n");
662 case NETLOOP_CONTINUE
:
668 #ifdef CONFIG_USB_KEYBOARD
671 #ifdef CONFIG_CMD_TFTPPUT
672 /* Clear out the handlers */
673 net_set_udp_handler(NULL
);
674 net_set_icmp_handler(NULL
);
676 net_set_state(prev_net_state
);
680 /**********************************************************************/
682 static void start_again_timeout_handler(void)
684 net_set_state(NETLOOP_RESTART
);
687 int net_start_again(void)
690 int retry_forever
= 0;
691 unsigned long retrycnt
= 0;
694 nretry
= env_get("netretry");
696 if (!strcmp(nretry
, "yes"))
698 else if (!strcmp(nretry
, "no"))
700 else if (!strcmp(nretry
, "once"))
703 retrycnt
= simple_strtoul(nretry
, NULL
, 0);
709 if ((!retry_forever
) && (net_try_count
> retrycnt
)) {
711 net_set_state(NETLOOP_FAIL
);
713 * We don't provide a way for the protocol to return an error,
714 * but this is almost always the reason.
722 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
723 eth_try_another(!net_restarted
);
726 if (net_restart_wrap
) {
727 net_restart_wrap
= 0;
728 if (net_dev_exists
) {
729 net_set_timeout_handler(10000UL,
730 start_again_timeout_handler
);
731 net_set_udp_handler(NULL
);
733 net_set_state(NETLOOP_FAIL
);
736 net_set_state(NETLOOP_RESTART
);
741 /**********************************************************************/
746 static void dummy_handler(uchar
*pkt
, unsigned dport
,
747 struct in_addr sip
, unsigned sport
,
752 rxhand_f
*net_get_udp_handler(void)
754 return udp_packet_handler
;
757 void net_set_udp_handler(rxhand_f
*f
)
759 debug_cond(DEBUG_INT_STATE
, "--- net_loop UDP handler set (%p)\n", f
);
761 udp_packet_handler
= dummy_handler
;
763 udp_packet_handler
= f
;
766 rxhand_f
*net_get_arp_handler(void)
768 return arp_packet_handler
;
771 void net_set_arp_handler(rxhand_f
*f
)
773 debug_cond(DEBUG_INT_STATE
, "--- net_loop ARP handler set (%p)\n", f
);
775 arp_packet_handler
= dummy_handler
;
777 arp_packet_handler
= f
;
780 #ifdef CONFIG_CMD_TFTPPUT
781 void net_set_icmp_handler(rxhand_icmp_f
*f
)
783 packet_icmp_handler
= f
;
787 void net_set_timeout_handler(ulong iv
, thand_f
*f
)
790 debug_cond(DEBUG_INT_STATE
,
791 "--- net_loop timeout handler cancelled\n");
792 time_handler
= (thand_f
*)0;
794 debug_cond(DEBUG_INT_STATE
,
795 "--- net_loop timeout handler set (%p)\n", f
);
797 time_start
= get_timer(0);
798 time_delta
= iv
* CONFIG_SYS_HZ
/ 1000;
802 uchar
*net_get_async_tx_pkt_buf(void)
804 if (arp_is_waiting())
805 return arp_tx_packet
; /* If we are waiting, we already sent */
807 return net_tx_packet
;
810 int net_send_udp_packet(uchar
*ether
, struct in_addr dest
, int dport
, int sport
,
813 return net_send_ip_packet(ether
, dest
, dport
, sport
, payload_len
,
814 IPPROTO_UDP
, 0, 0, 0);
817 int net_send_ip_packet(uchar
*ether
, struct in_addr dest
, int dport
, int sport
,
818 int payload_len
, int proto
, u8 action
, u32 tcp_seq_num
,
825 /* make sure the net_tx_packet is initialized (net_init() was called) */
826 assert(net_tx_packet
!= NULL
);
827 if (net_tx_packet
== NULL
)
830 /* convert to new style broadcast */
831 if (dest
.s_addr
== 0)
832 dest
.s_addr
= 0xFFFFFFFF;
834 /* if broadcast, make the ether address a broadcast and don't do ARP */
835 if (dest
.s_addr
== 0xFFFFFFFF)
836 ether
= (uchar
*)net_bcast_ethaddr
;
838 pkt
= (uchar
*)net_tx_packet
;
840 eth_hdr_size
= net_set_ether(pkt
, ether
, PROT_IP
);
844 net_set_udp_header(pkt
+ eth_hdr_size
, dest
, dport
, sport
,
846 pkt_hdr_size
= eth_hdr_size
+ IP_UDP_HDR_SIZE
;
852 /* if MAC address was not discovered yet, do an ARP request */
853 if (memcmp(ether
, net_null_ethaddr
, 6) == 0) {
854 debug_cond(DEBUG_DEV_PKT
, "sending ARP for %pI4\n", &dest
);
856 /* save the ip and eth addr for the packet to send after arp */
857 net_arp_wait_packet_ip
= dest
;
858 arp_wait_packet_ethaddr
= ether
;
860 /* size of the waiting packet */
861 arp_wait_tx_packet_size
= pkt_hdr_size
+ payload_len
;
863 /* and do the ARP request */
865 arp_wait_timer_start
= get_timer(0);
867 return 1; /* waiting */
869 debug_cond(DEBUG_DEV_PKT
, "sending UDP to %pI4/%pM\n",
871 net_send_packet(net_tx_packet
, pkt_hdr_size
+ payload_len
);
872 return 0; /* transmitted */
876 #ifdef CONFIG_IP_DEFRAG
878 * This function collects fragments in a single packet, according
879 * to the algorithm in RFC815. It returns NULL or the pointer to
880 * a complete packet, in static storage
882 #ifndef CONFIG_NET_MAXDEFRAG
883 #define CONFIG_NET_MAXDEFRAG 16384
885 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
887 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
890 * this is the packet being assembled, either data or frag control.
891 * Fragments go by 8 bytes, so this union must be 8 bytes long
894 /* first_byte is address of this structure */
895 u16 last_byte
; /* last byte in this hole + 1 (begin of next hole) */
896 u16 next_hole
; /* index of next (in 8-b blocks), 0 == none */
897 u16 prev_hole
; /* index of prev, 0 == none */
901 static struct ip_udp_hdr
*__net_defragment(struct ip_udp_hdr
*ip
, int *lenp
)
903 static uchar pkt_buff
[IP_PKTSIZE
] __aligned(PKTALIGN
);
904 static u16 first_hole
, total_len
;
905 struct hole
*payload
, *thisfrag
, *h
, *newh
;
906 struct ip_udp_hdr
*localip
= (struct ip_udp_hdr
*)pkt_buff
;
907 uchar
*indata
= (uchar
*)ip
;
908 int offset8
, start
, len
, done
= 0;
909 u16 ip_off
= ntohs(ip
->ip_off
);
911 /* payload starts after IP header, this fragment is in there */
912 payload
= (struct hole
*)(pkt_buff
+ IP_HDR_SIZE
);
913 offset8
= (ip_off
& IP_OFFS
);
914 thisfrag
= payload
+ offset8
;
916 len
= ntohs(ip
->ip_len
) - IP_HDR_SIZE
;
918 if (start
+ len
> IP_MAXUDP
) /* fragment extends too far */
921 if (!total_len
|| localip
->ip_id
!= ip
->ip_id
) {
922 /* new (or different) packet, reset structs */
924 payload
[0].last_byte
= ~0;
925 payload
[0].next_hole
= 0;
926 payload
[0].prev_hole
= 0;
928 /* any IP header will work, copy the first we received */
929 memcpy(localip
, ip
, IP_HDR_SIZE
);
933 * What follows is the reassembly algorithm. We use the payload
934 * array as a linked list of hole descriptors, as each hole starts
935 * at a multiple of 8 bytes. However, last byte can be whatever value,
936 * so it is represented as byte count, not as 8-byte blocks.
939 h
= payload
+ first_hole
;
940 while (h
->last_byte
< start
) {
942 /* no hole that far away */
945 h
= payload
+ h
->next_hole
;
948 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
949 if (offset8
+ ((len
+ 7) / 8) <= h
- payload
) {
950 /* no overlap with holes (dup fragment?) */
954 if (!(ip_off
& IP_FLAGS_MFRAG
)) {
955 /* no more fragmentss: truncate this (last) hole */
956 total_len
= start
+ len
;
957 h
->last_byte
= start
+ len
;
961 * There is some overlap: fix the hole list. This code doesn't
962 * deal with a fragment that overlaps with two different holes
963 * (thus being a superset of a previously-received fragment).
966 if ((h
>= thisfrag
) && (h
->last_byte
<= start
+ len
)) {
967 /* complete overlap with hole: remove hole */
968 if (!h
->prev_hole
&& !h
->next_hole
) {
969 /* last remaining hole */
971 } else if (!h
->prev_hole
) {
973 first_hole
= h
->next_hole
;
974 payload
[h
->next_hole
].prev_hole
= 0;
975 } else if (!h
->next_hole
) {
977 payload
[h
->prev_hole
].next_hole
= 0;
979 /* in the middle of the list */
980 payload
[h
->next_hole
].prev_hole
= h
->prev_hole
;
981 payload
[h
->prev_hole
].next_hole
= h
->next_hole
;
984 } else if (h
->last_byte
<= start
+ len
) {
985 /* overlaps with final part of the hole: shorten this hole */
986 h
->last_byte
= start
;
988 } else if (h
>= thisfrag
) {
989 /* overlaps with initial part of the hole: move this hole */
990 newh
= thisfrag
+ (len
/ 8);
994 payload
[h
->next_hole
].prev_hole
= (h
- payload
);
996 payload
[h
->prev_hole
].next_hole
= (h
- payload
);
998 first_hole
= (h
- payload
);
1001 /* fragment sits in the middle: split the hole */
1002 newh
= thisfrag
+ (len
/ 8);
1004 h
->last_byte
= start
;
1005 h
->next_hole
= (newh
- payload
);
1006 newh
->prev_hole
= (h
- payload
);
1007 if (newh
->next_hole
)
1008 payload
[newh
->next_hole
].prev_hole
= (newh
- payload
);
1011 /* finally copy this fragment and possibly return whole packet */
1012 memcpy((uchar
*)thisfrag
, indata
+ IP_HDR_SIZE
, len
);
1016 localip
->ip_len
= htons(total_len
);
1017 *lenp
= total_len
+ IP_HDR_SIZE
;
1021 static inline struct ip_udp_hdr
*net_defragment(struct ip_udp_hdr
*ip
,
1024 u16 ip_off
= ntohs(ip
->ip_off
);
1025 if (!(ip_off
& (IP_OFFS
| IP_FLAGS_MFRAG
)))
1026 return ip
; /* not a fragment */
1027 return __net_defragment(ip
, lenp
);
1030 #else /* !CONFIG_IP_DEFRAG */
1032 static inline struct ip_udp_hdr
*net_defragment(struct ip_udp_hdr
*ip
,
1035 u16 ip_off
= ntohs(ip
->ip_off
);
1036 if (!(ip_off
& (IP_OFFS
| IP_FLAGS_MFRAG
)))
1037 return ip
; /* not a fragment */
1043 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1046 * @parma ip IP packet containing the ICMP
1048 static void receive_icmp(struct ip_udp_hdr
*ip
, int len
,
1049 struct in_addr src_ip
, struct ethernet_hdr
*et
)
1051 struct icmp_hdr
*icmph
= (struct icmp_hdr
*)&ip
->udp_src
;
1053 switch (icmph
->type
) {
1055 if (icmph
->code
!= ICMP_REDIR_HOST
)
1057 printf(" ICMP Host Redirect to %pI4 ",
1058 &icmph
->un
.gateway
);
1061 #if defined(CONFIG_CMD_PING)
1062 ping_receive(et
, ip
, len
);
1064 #ifdef CONFIG_CMD_TFTPPUT
1065 if (packet_icmp_handler
)
1066 packet_icmp_handler(icmph
->type
, icmph
->code
,
1067 ntohs(ip
->udp_dst
), src_ip
,
1068 ntohs(ip
->udp_src
), icmph
->un
.data
,
1069 ntohs(ip
->udp_len
));
1075 void net_process_received_packet(uchar
*in_packet
, int len
)
1077 struct ethernet_hdr
*et
;
1078 struct ip_udp_hdr
*ip
;
1079 struct in_addr dst_ip
;
1080 struct in_addr src_ip
;
1082 #if defined(CONFIG_CMD_CDP)
1085 ushort cti
= 0, vlanid
= VLAN_NONE
, myvlanid
, mynvlanid
;
1087 debug_cond(DEBUG_NET_PKT
, "packet received\n");
1089 net_rx_packet
= in_packet
;
1090 net_rx_packet_len
= len
;
1091 et
= (struct ethernet_hdr
*)in_packet
;
1093 /* too small packet? */
1094 if (len
< ETHER_HDR_SIZE
)
1097 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
1099 (*push_packet
)(in_packet
, len
);
1104 #if defined(CONFIG_CMD_CDP)
1105 /* keep track if packet is CDP */
1106 iscdp
= is_cdp_packet(et
->et_dest
);
1109 myvlanid
= ntohs(net_our_vlan
);
1110 if (myvlanid
== (ushort
)-1)
1111 myvlanid
= VLAN_NONE
;
1112 mynvlanid
= ntohs(net_native_vlan
);
1113 if (mynvlanid
== (ushort
)-1)
1114 mynvlanid
= VLAN_NONE
;
1116 eth_proto
= ntohs(et
->et_protlen
);
1118 if (eth_proto
< 1514) {
1119 struct e802_hdr
*et802
= (struct e802_hdr
*)et
;
1121 * Got a 802.2 packet. Check the other protocol field.
1122 * XXX VLAN over 802.2+SNAP not implemented!
1124 eth_proto
= ntohs(et802
->et_prot
);
1126 ip
= (struct ip_udp_hdr
*)(in_packet
+ E802_HDR_SIZE
);
1127 len
-= E802_HDR_SIZE
;
1129 } else if (eth_proto
!= PROT_VLAN
) { /* normal packet */
1130 ip
= (struct ip_udp_hdr
*)(in_packet
+ ETHER_HDR_SIZE
);
1131 len
-= ETHER_HDR_SIZE
;
1133 } else { /* VLAN packet */
1134 struct vlan_ethernet_hdr
*vet
=
1135 (struct vlan_ethernet_hdr
*)et
;
1137 debug_cond(DEBUG_NET_PKT
, "VLAN packet received\n");
1139 /* too small packet? */
1140 if (len
< VLAN_ETHER_HDR_SIZE
)
1143 /* if no VLAN active */
1144 if ((ntohs(net_our_vlan
) & VLAN_IDMASK
) == VLAN_NONE
1145 #if defined(CONFIG_CMD_CDP)
1151 cti
= ntohs(vet
->vet_tag
);
1152 vlanid
= cti
& VLAN_IDMASK
;
1153 eth_proto
= ntohs(vet
->vet_type
);
1155 ip
= (struct ip_udp_hdr
*)(in_packet
+ VLAN_ETHER_HDR_SIZE
);
1156 len
-= VLAN_ETHER_HDR_SIZE
;
1159 debug_cond(DEBUG_NET_PKT
, "Receive from protocol 0x%x\n", eth_proto
);
1161 #if defined(CONFIG_CMD_CDP)
1163 cdp_receive((uchar
*)ip
, len
);
1168 if ((myvlanid
& VLAN_IDMASK
) != VLAN_NONE
) {
1169 if (vlanid
== VLAN_NONE
)
1170 vlanid
= (mynvlanid
& VLAN_IDMASK
);
1172 if (vlanid
!= (myvlanid
& VLAN_IDMASK
))
1176 switch (eth_proto
) {
1178 arp_receive(et
, ip
, len
);
1181 #ifdef CONFIG_CMD_RARP
1183 rarp_receive(ip
, len
);
1187 debug_cond(DEBUG_NET_PKT
, "Got IP\n");
1188 /* Before we start poking the header, make sure it is there */
1189 if (len
< IP_UDP_HDR_SIZE
) {
1190 debug("len bad %d < %lu\n", len
,
1191 (ulong
)IP_UDP_HDR_SIZE
);
1194 /* Check the packet length */
1195 if (len
< ntohs(ip
->ip_len
)) {
1196 debug("len bad %d < %d\n", len
, ntohs(ip
->ip_len
));
1199 len
= ntohs(ip
->ip_len
);
1200 debug_cond(DEBUG_NET_PKT
, "len=%d, v=%02x\n",
1201 len
, ip
->ip_hl_v
& 0xff);
1203 /* Can't deal with anything except IPv4 */
1204 if ((ip
->ip_hl_v
& 0xf0) != 0x40)
1206 /* Can't deal with IP options (headers != 20 bytes) */
1207 if ((ip
->ip_hl_v
& 0x0f) > 0x05)
1209 /* Check the Checksum of the header */
1210 if (!ip_checksum_ok((uchar
*)ip
, IP_HDR_SIZE
)) {
1211 debug("checksum bad\n");
1214 /* If it is not for us, ignore it */
1215 dst_ip
= net_read_ip(&ip
->ip_dst
);
1216 if (net_ip
.s_addr
&& dst_ip
.s_addr
!= net_ip
.s_addr
&&
1217 dst_ip
.s_addr
!= 0xFFFFFFFF) {
1218 #ifdef CONFIG_MCAST_TFTP
1219 if (net_mcast_addr
!= dst_ip
)
1223 /* Read source IP address for later use */
1224 src_ip
= net_read_ip(&ip
->ip_src
);
1226 * The function returns the unchanged packet if it's not
1227 * a fragment, and either the complete packet or NULL if
1228 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1230 ip
= net_defragment(ip
, &len
);
1234 * watch for ICMP host redirects
1236 * There is no real handler code (yet). We just watch
1237 * for ICMP host redirect messages. In case anybody
1238 * sees these messages: please contact me
1239 * (wd@denx.de), or - even better - send me the
1240 * necessary fixes :-)
1242 * Note: in all cases where I have seen this so far
1243 * it was a problem with the router configuration,
1244 * for instance when a router was configured in the
1245 * BOOTP reply, but the TFTP server was on the same
1246 * subnet. So this is probably a warning that your
1247 * configuration might be wrong. But I'm not really
1248 * sure if there aren't any other situations.
1250 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1251 * we send a tftp packet to a dead connection, or when
1252 * there is no server at the other end.
1254 if (ip
->ip_p
== IPPROTO_ICMP
) {
1255 receive_icmp(ip
, len
, src_ip
, et
);
1257 } else if (ip
->ip_p
!= IPPROTO_UDP
) { /* Only UDP packets */
1261 debug_cond(DEBUG_DEV_PKT
,
1262 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1263 &dst_ip
, &src_ip
, len
);
1265 #ifdef CONFIG_UDP_CHECKSUM
1266 if (ip
->udp_xsum
!= 0) {
1272 xsum
+= (ntohs(ip
->udp_len
));
1273 xsum
+= (ntohl(ip
->ip_src
.s_addr
) >> 16) & 0x0000ffff;
1274 xsum
+= (ntohl(ip
->ip_src
.s_addr
) >> 0) & 0x0000ffff;
1275 xsum
+= (ntohl(ip
->ip_dst
.s_addr
) >> 16) & 0x0000ffff;
1276 xsum
+= (ntohl(ip
->ip_dst
.s_addr
) >> 0) & 0x0000ffff;
1278 sumlen
= ntohs(ip
->udp_len
);
1279 sumptr
= (ushort
*)&(ip
->udp_src
);
1281 while (sumlen
> 1) {
1284 sumdata
= *sumptr
++;
1285 xsum
+= ntohs(sumdata
);
1291 sumdata
= *(unsigned char *)sumptr
;
1292 sumdata
= (sumdata
<< 8) & 0xff00;
1295 while ((xsum
>> 16) != 0) {
1296 xsum
= (xsum
& 0x0000ffff) +
1297 ((xsum
>> 16) & 0x0000ffff);
1299 if ((xsum
!= 0x00000000) && (xsum
!= 0x0000ffff)) {
1300 printf(" UDP wrong checksum %08lx %08x\n",
1301 xsum
, ntohs(ip
->udp_xsum
));
1307 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
1308 nc_input_packet((uchar
*)ip
+ IP_UDP_HDR_SIZE
,
1312 ntohs(ip
->udp_len
) - UDP_HDR_SIZE
);
1315 * IP header OK. Pass the packet to the current handler.
1317 (*udp_packet_handler
)((uchar
*)ip
+ IP_UDP_HDR_SIZE
,
1321 ntohs(ip
->udp_len
) - UDP_HDR_SIZE
);
1323 #ifdef CONFIG_CMD_WOL
1325 wol_receive(ip
, len
);
1331 /**********************************************************************/
1333 static int net_check_prereq(enum proto_t protocol
)
1337 #if defined(CONFIG_CMD_PING)
1339 if (net_ping_ip
.s_addr
== 0) {
1340 puts("*** ERROR: ping address not given\n");
1345 #if defined(CONFIG_CMD_SNTP)
1347 if (net_ntp_server
.s_addr
== 0) {
1348 puts("*** ERROR: NTP server address not given\n");
1353 #if defined(CONFIG_CMD_DNS)
1355 if (net_dns_server
.s_addr
== 0) {
1356 puts("*** ERROR: DNS server address not given\n");
1361 #if defined(CONFIG_CMD_NFS)
1367 if (net_server_ip
.s_addr
== 0 && !is_serverip_in_cmd()) {
1368 puts("*** ERROR: `serverip' not set\n");
1371 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1372 defined(CONFIG_CMD_DNS)
1380 if (net_ip
.s_addr
== 0) {
1381 puts("*** ERROR: `ipaddr' not set\n");
1386 #ifdef CONFIG_CMD_RARP
1393 if (memcmp(net_ethaddr
, "\0\0\0\0\0\0", 6) == 0) {
1394 int num
= eth_get_dev_index();
1398 puts("*** ERROR: No ethernet found.\n");
1401 puts("*** ERROR: `ethaddr' not set\n");
1404 printf("*** ERROR: `eth%daddr' not set\n",
1418 /**********************************************************************/
1421 net_eth_hdr_size(void)
1425 myvlanid
= ntohs(net_our_vlan
);
1426 if (myvlanid
== (ushort
)-1)
1427 myvlanid
= VLAN_NONE
;
1429 return ((myvlanid
& VLAN_IDMASK
) == VLAN_NONE
) ? ETHER_HDR_SIZE
:
1430 VLAN_ETHER_HDR_SIZE
;
1433 int net_set_ether(uchar
*xet
, const uchar
*dest_ethaddr
, uint prot
)
1435 struct ethernet_hdr
*et
= (struct ethernet_hdr
*)xet
;
1438 myvlanid
= ntohs(net_our_vlan
);
1439 if (myvlanid
== (ushort
)-1)
1440 myvlanid
= VLAN_NONE
;
1442 memcpy(et
->et_dest
, dest_ethaddr
, 6);
1443 memcpy(et
->et_src
, net_ethaddr
, 6);
1444 if ((myvlanid
& VLAN_IDMASK
) == VLAN_NONE
) {
1445 et
->et_protlen
= htons(prot
);
1446 return ETHER_HDR_SIZE
;
1448 struct vlan_ethernet_hdr
*vet
=
1449 (struct vlan_ethernet_hdr
*)xet
;
1451 vet
->vet_vlan_type
= htons(PROT_VLAN
);
1452 vet
->vet_tag
= htons((0 << 5) | (myvlanid
& VLAN_IDMASK
));
1453 vet
->vet_type
= htons(prot
);
1454 return VLAN_ETHER_HDR_SIZE
;
1458 int net_update_ether(struct ethernet_hdr
*et
, uchar
*addr
, uint prot
)
1462 memcpy(et
->et_dest
, addr
, 6);
1463 memcpy(et
->et_src
, net_ethaddr
, 6);
1464 protlen
= ntohs(et
->et_protlen
);
1465 if (protlen
== PROT_VLAN
) {
1466 struct vlan_ethernet_hdr
*vet
=
1467 (struct vlan_ethernet_hdr
*)et
;
1468 vet
->vet_type
= htons(prot
);
1469 return VLAN_ETHER_HDR_SIZE
;
1470 } else if (protlen
> 1514) {
1471 et
->et_protlen
= htons(prot
);
1472 return ETHER_HDR_SIZE
;
1475 struct e802_hdr
*et802
= (struct e802_hdr
*)et
;
1476 et802
->et_prot
= htons(prot
);
1477 return E802_HDR_SIZE
;
1481 void net_set_ip_header(uchar
*pkt
, struct in_addr dest
, struct in_addr source
,
1482 u16 pkt_len
, u8 proto
)
1484 struct ip_udp_hdr
*ip
= (struct ip_udp_hdr
*)pkt
;
1487 * Construct an IP header.
1489 /* IP_HDR_SIZE / 4 (not including UDP) */
1492 ip
->ip_len
= htons(pkt_len
);
1494 ip
->ip_id
= htons(net_ip_id
++);
1495 ip
->ip_off
= htons(IP_FLAGS_DFRAG
); /* Don't fragment */
1498 /* already in network byte order */
1499 net_copy_ip((void *)&ip
->ip_src
, &source
);
1500 /* already in network byte order */
1501 net_copy_ip((void *)&ip
->ip_dst
, &dest
);
1503 ip
->ip_sum
= compute_ip_checksum(ip
, IP_HDR_SIZE
);
1506 void net_set_udp_header(uchar
*pkt
, struct in_addr dest
, int dport
, int sport
,
1509 struct ip_udp_hdr
*ip
= (struct ip_udp_hdr
*)pkt
;
1512 * If the data is an odd number of bytes, zero the
1513 * byte after the last byte so that the checksum
1517 pkt
[IP_UDP_HDR_SIZE
+ len
] = 0;
1519 net_set_ip_header(pkt
, dest
, net_ip
, IP_UDP_HDR_SIZE
+ len
,
1522 ip
->udp_src
= htons(sport
);
1523 ip
->udp_dst
= htons(dport
);
1524 ip
->udp_len
= htons(UDP_HDR_SIZE
+ len
);
1528 void copy_filename(char *dst
, const char *src
, int size
)
1530 if (src
&& *src
&& (*src
== '"')) {
1535 while ((--size
> 0) && src
&& *src
&& (*src
!= '"'))
1540 int is_serverip_in_cmd(void)
1542 return !!strchr(net_boot_file_name
, ':');
1545 int net_parse_bootfile(struct in_addr
*ipaddr
, char *filename
, int max_len
)
1549 if (net_boot_file_name
[0] == '\0')
1552 colon
= strchr(net_boot_file_name
, ':');
1555 *ipaddr
= string_to_ip(net_boot_file_name
);
1556 strncpy(filename
, colon
+ 1, max_len
);
1558 strncpy(filename
, net_boot_file_name
, max_len
);
1560 filename
[max_len
- 1] = '\0';
1565 #if defined(CONFIG_CMD_NFS) || \
1566 defined(CONFIG_CMD_SNTP) || \
1567 defined(CONFIG_CMD_DNS)
1569 * make port a little random (1024-17407)
1570 * This keeps the math somewhat trivial to compute, and seems to work with
1571 * all supported protocols/clients/servers
1573 unsigned int random_port(void)
1575 return 1024 + (get_timer(0) % 0x4000);
1579 void ip_to_string(struct in_addr x
, char *s
)
1581 x
.s_addr
= ntohl(x
.s_addr
);
1582 sprintf(s
, "%d.%d.%d.%d",
1583 (int) ((x
.s_addr
>> 24) & 0xff),
1584 (int) ((x
.s_addr
>> 16) & 0xff),
1585 (int) ((x
.s_addr
>> 8) & 0xff),
1586 (int) ((x
.s_addr
>> 0) & 0xff)
1590 void vlan_to_string(ushort x
, char *s
)
1594 if (x
== (ushort
)-1)
1600 sprintf(s
, "%d", x
& VLAN_IDMASK
);
1603 ushort
string_to_vlan(const char *s
)
1608 return htons(VLAN_NONE
);
1610 if (*s
< '0' || *s
> '9')
1613 id
= (ushort
)simple_strtoul(s
, NULL
, 10);
1618 ushort
env_get_vlan(char *var
)
1620 return string_to_vlan(env_get(var
));