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
86 #include <environment.h>
88 #if defined(CONFIG_STATUS_LED)
90 #include <status_led.h>
93 #include <linux/compiler.h>
97 #if defined(CONFIG_CMD_DNS)
100 #include "link_local.h"
104 #if defined(CONFIG_CMD_SNTP)
109 DECLARE_GLOBAL_DATA_PTR
;
111 /** BOOTP EXTENTIONS **/
113 /* Our subnet mask (0=unknown) */
114 IPaddr_t NetOurSubnetMask
;
115 /* Our gateways IP address */
116 IPaddr_t NetOurGatewayIP
;
117 /* Our DNS IP address */
118 IPaddr_t NetOurDNSIP
;
119 #if defined(CONFIG_BOOTP_DNS2)
120 /* Our 2nd DNS IP address */
121 IPaddr_t NetOurDNS2IP
;
124 char NetOurNISDomain
[32] = {0,};
126 char NetOurHostName
[32] = {0,};
128 char NetOurRootPath
[64] = {0,};
129 /* Our bootfile size in blocks */
130 ushort NetBootFileSize
;
132 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
136 /** END OF BOOTP EXTENTIONS **/
138 /* The actual transferred size of the bootfile (in bytes) */
139 ulong NetBootFileXferSize
;
140 /* Our ethernet address */
141 uchar NetOurEther
[6];
142 /* Boot server enet address */
143 uchar NetServerEther
[6];
144 /* Our IP addr (0 = unknown) */
146 /* Server IP addr (0 = unknown) */
147 IPaddr_t NetServerIP
;
148 /* Current receive packet */
150 /* Current rx packet length */
154 /* Ethernet bcast address */
155 uchar NetBcastAddr
[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
156 uchar NetEtherNullAddr
[6];
158 void (*push_packet
)(void *, int len
) = 0;
160 /* Network loop state */
161 enum net_loop_state net_state
;
162 /* Tried all network devices */
164 /* Network loop restarted */
165 static int NetRestarted
;
166 /* At least one device configured */
167 static int NetDevExists
;
169 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
170 /* default is without VLAN */
171 ushort NetOurVLAN
= 0xFFFF;
173 ushort NetOurNativeVLAN
= 0xFFFF;
178 #if defined(CONFIG_CMD_SNTP)
179 /* NTP server IP address */
180 IPaddr_t NetNtpServerIP
;
181 /* offset time from UTC */
185 static uchar PktBuf
[(PKTBUFSRX
+1) * PKTSIZE_ALIGN
+ PKTALIGN
];
188 uchar
*NetRxPackets
[PKTBUFSRX
];
190 /* Current UDP RX packet handler */
191 static rxhand_f
*udp_packet_handler
;
192 /* Current ARP RX packet handler */
193 static rxhand_f
*arp_packet_handler
;
194 #ifdef CONFIG_CMD_TFTPPUT
195 /* Current ICMP rx handler */
196 static rxhand_icmp_f
*packet_icmp_handler
;
198 /* Current timeout handler */
199 static thand_f
*timeHandler
;
200 /* Time base value */
201 static ulong timeStart
;
202 /* Current timeout value */
203 static ulong timeDelta
;
204 /* THE transmit packet */
207 static int net_check_prereq(enum proto_t protocol
);
209 static int NetTryCount
;
211 int __maybe_unused net_busy_flag
;
213 /**********************************************************************/
215 static int on_bootfile(const char *name
, const char *value
, enum env_op op
,
220 case env_op_overwrite
:
221 copy_filename(BootFile
, value
, sizeof(BootFile
));
229 U_BOOT_ENV_CALLBACK(bootfile
, on_bootfile
);
232 * Check if autoload is enabled. If so, use either NFS or TFTP to download
235 void net_auto_load(void)
237 #if defined(CONFIG_CMD_NFS)
238 const char *s
= getenv("autoload");
240 if (s
!= NULL
&& strcmp(s
, "NFS") == 0) {
242 * Use NFS to load the bootfile.
248 if (getenv_yesno("autoload") == 0) {
250 * Just use BOOTP/RARP to configure system;
251 * Do not use TFTP to load the bootfile.
253 net_set_state(NETLOOP_SUCCESS
);
259 static void NetInitLoop(void)
261 static int env_changed_id
;
262 int env_id
= get_env_id();
264 /* update only when the environment has changed */
265 if (env_changed_id
!= env_id
) {
266 NetOurIP
= getenv_IPaddr("ipaddr");
267 NetOurGatewayIP
= getenv_IPaddr("gatewayip");
268 NetOurSubnetMask
= getenv_IPaddr("netmask");
269 NetServerIP
= getenv_IPaddr("serverip");
270 NetOurNativeVLAN
= getenv_VLAN("nvlan");
271 NetOurVLAN
= getenv_VLAN("vlan");
272 #if defined(CONFIG_CMD_DNS)
273 NetOurDNSIP
= getenv_IPaddr("dnsip");
275 env_changed_id
= env_id
;
278 memcpy(NetOurEther
, eth_get_dev()->enetaddr
, 6);
283 static void net_clear_handlers(void)
285 net_set_udp_handler(NULL
);
286 net_set_arp_handler(NULL
);
287 NetSetTimeout(0, NULL
);
290 static void net_cleanup_loop(void)
292 net_clear_handlers();
297 static int first_call
= 1;
301 * Setup packet buffers, aligned correctly.
305 NetTxPacket
= &PktBuf
[0] + (PKTALIGN
- 1);
306 NetTxPacket
-= (ulong
)NetTxPacket
% PKTALIGN
;
307 for (i
= 0; i
< PKTBUFSRX
; i
++)
308 NetRxPackets
[i
] = NetTxPacket
+ (i
+ 1) * PKTSIZE_ALIGN
;
311 net_clear_handlers();
313 /* Only need to setup buffer pointers once. */
320 /**********************************************************************/
322 * Main network processing loop.
325 int NetLoop(enum proto_t protocol
)
333 debug_cond(DEBUG_INT_STATE
, "--- NetLoop Entry\n");
335 bootstage_mark_name(BOOTSTAGE_ID_ETH_START
, "eth_start");
337 if (eth_is_on_demand_init() || protocol
!= NETCONS
) {
340 if (eth_init(bd
) < 0) {
345 eth_init_state_only(bd
);
348 #ifdef CONFIG_USB_KEYBOARD
351 net_set_state(NETLOOP_CONTINUE
);
354 * Start the ball rolling with the given start function. From
355 * here on, this code is a state machine driven by received
356 * packets and timer events.
358 debug_cond(DEBUG_INT_STATE
, "--- NetLoop Init\n");
361 switch (net_check_prereq(protocol
)) {
363 /* network not configured */
368 /* network device not configured */
373 NetBootFileXferSize
= 0;
376 #ifdef CONFIG_CMD_TFTPPUT
379 /* always use ARP to get server ethernet address */
382 #ifdef CONFIG_CMD_TFTPSRV
387 #if defined(CONFIG_CMD_DHCP)
391 DhcpRequest(); /* Basically same as BOOTP */
401 #if defined(CONFIG_CMD_RARP)
408 #if defined(CONFIG_CMD_PING)
413 #if defined(CONFIG_CMD_NFS)
418 #if defined(CONFIG_CMD_CDP)
423 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
428 #if defined(CONFIG_CMD_SNTP)
433 #if defined(CONFIG_CMD_DNS)
438 #if defined(CONFIG_CMD_LINK_LOCAL)
450 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
451 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
452 defined(CONFIG_STATUS_LED) && \
453 defined(STATUS_LED_RED)
455 * Echo the inverted link state to the fault LED.
457 if (miiphy_link(eth_get_dev()->name
, CONFIG_SYS_FAULT_MII_ADDR
))
458 status_led_set(STATUS_LED_RED
, STATUS_LED_OFF
);
460 status_led_set(STATUS_LED_RED
, STATUS_LED_ON
);
461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
462 #endif /* CONFIG_MII, ... */
463 #ifdef CONFIG_USB_KEYBOARD
468 * Main packet reception loop. Loop receiving packets until
469 * someone sets `net_state' to a state that terminates.
473 #ifdef CONFIG_SHOW_ACTIVITY
477 * Check the ethernet for a new packet. The ethernet
478 * receive routine will process it.
483 * Abort if ctrl-c was pressed.
486 /* cancel any ARP that may not have completed */
487 NetArpWaitPacketIP
= 0;
491 /* Invalidate the last protocol */
492 eth_set_last_protocol(BOOTP
);
495 /* include a debug print as well incase the debug
496 messages are directed to stderr */
497 debug_cond(DEBUG_INT_STATE
, "--- NetLoop Abort!\n");
504 * Check for a timeout, and run the timeout handler
507 if (timeHandler
&& ((get_timer(0) - timeStart
) > timeDelta
)) {
510 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
511 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
512 defined(CONFIG_STATUS_LED) && \
513 defined(STATUS_LED_RED)
515 * Echo the inverted link state to the fault LED.
517 if (miiphy_link(eth_get_dev()->name
,
518 CONFIG_SYS_FAULT_MII_ADDR
)) {
519 status_led_set(STATUS_LED_RED
, STATUS_LED_OFF
);
521 status_led_set(STATUS_LED_RED
, STATUS_LED_ON
);
523 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
524 #endif /* CONFIG_MII, ... */
525 debug_cond(DEBUG_INT_STATE
, "--- NetLoop timeout\n");
527 timeHandler
= (thand_f
*)0;
534 case NETLOOP_RESTART
:
538 case NETLOOP_SUCCESS
:
540 if (NetBootFileXferSize
> 0) {
541 printf("Bytes transferred = %ld (%lx hex)\n",
543 NetBootFileXferSize
);
544 setenv_hex("filesize", NetBootFileXferSize
);
545 setenv_hex("fileaddr", load_addr
);
547 if (protocol
!= NETCONS
)
550 eth_halt_state_only();
552 eth_set_last_protocol(protocol
);
554 ret
= NetBootFileXferSize
;
555 debug_cond(DEBUG_INT_STATE
, "--- NetLoop Success!\n");
560 /* Invalidate the last protocol */
561 eth_set_last_protocol(BOOTP
);
562 debug_cond(DEBUG_INT_STATE
, "--- NetLoop Fail!\n");
565 case NETLOOP_CONTINUE
:
571 #ifdef CONFIG_USB_KEYBOARD
574 #ifdef CONFIG_CMD_TFTPPUT
575 /* Clear out the handlers */
576 net_set_udp_handler(NULL
);
577 net_set_icmp_handler(NULL
);
582 /**********************************************************************/
585 startAgainTimeout(void)
587 net_set_state(NETLOOP_RESTART
);
590 void NetStartAgain(void)
593 int retry_forever
= 0;
594 unsigned long retrycnt
= 0;
596 nretry
= getenv("netretry");
598 if (!strcmp(nretry
, "yes"))
600 else if (!strcmp(nretry
, "no"))
602 else if (!strcmp(nretry
, "once"))
605 retrycnt
= simple_strtoul(nretry
, NULL
, 0);
609 if ((!retry_forever
) && (NetTryCount
>= retrycnt
)) {
611 net_set_state(NETLOOP_FAIL
);
618 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
619 eth_try_another(!NetRestarted
);
622 if (NetRestartWrap
) {
625 NetSetTimeout(10000UL, startAgainTimeout
);
626 net_set_udp_handler(NULL
);
628 net_set_state(NETLOOP_FAIL
);
631 net_set_state(NETLOOP_RESTART
);
635 /**********************************************************************/
640 static void dummy_handler(uchar
*pkt
, unsigned dport
,
641 IPaddr_t sip
, unsigned sport
,
646 rxhand_f
*net_get_udp_handler(void)
648 return udp_packet_handler
;
651 void net_set_udp_handler(rxhand_f
*f
)
653 debug_cond(DEBUG_INT_STATE
, "--- NetLoop UDP handler set (%p)\n", f
);
655 udp_packet_handler
= dummy_handler
;
657 udp_packet_handler
= f
;
660 rxhand_f
*net_get_arp_handler(void)
662 return arp_packet_handler
;
665 void net_set_arp_handler(rxhand_f
*f
)
667 debug_cond(DEBUG_INT_STATE
, "--- NetLoop ARP handler set (%p)\n", f
);
669 arp_packet_handler
= dummy_handler
;
671 arp_packet_handler
= f
;
674 #ifdef CONFIG_CMD_TFTPPUT
675 void net_set_icmp_handler(rxhand_icmp_f
*f
)
677 packet_icmp_handler
= f
;
682 NetSetTimeout(ulong iv
, thand_f
*f
)
685 debug_cond(DEBUG_INT_STATE
,
686 "--- NetLoop timeout handler cancelled\n");
687 timeHandler
= (thand_f
*)0;
689 debug_cond(DEBUG_INT_STATE
,
690 "--- NetLoop timeout handler set (%p)\n", f
);
692 timeStart
= get_timer(0);
693 timeDelta
= iv
* CONFIG_SYS_HZ
/ 1000;
697 int NetSendUDPPacket(uchar
*ether
, IPaddr_t dest
, int dport
, int sport
,
704 /* make sure the NetTxPacket is initialized (NetInit() was called) */
705 assert(NetTxPacket
!= NULL
);
706 if (NetTxPacket
== NULL
)
709 /* convert to new style broadcast */
713 /* if broadcast, make the ether address a broadcast and don't do ARP */
714 if (dest
== 0xFFFFFFFF)
715 ether
= NetBcastAddr
;
717 pkt
= (uchar
*)NetTxPacket
;
719 eth_hdr_size
= NetSetEther(pkt
, ether
, PROT_IP
);
721 net_set_udp_header(pkt
, dest
, dport
, sport
, payload_len
);
722 pkt_hdr_size
= eth_hdr_size
+ IP_UDP_HDR_SIZE
;
724 /* if MAC address was not discovered yet, do an ARP request */
725 if (memcmp(ether
, NetEtherNullAddr
, 6) == 0) {
726 debug_cond(DEBUG_DEV_PKT
, "sending ARP for %pI4\n", &dest
);
728 /* save the ip and eth addr for the packet to send after arp */
729 NetArpWaitPacketIP
= dest
;
730 NetArpWaitPacketMAC
= ether
;
732 /* size of the waiting packet */
733 NetArpWaitTxPacketSize
= pkt_hdr_size
+ payload_len
;
735 /* and do the ARP request */
737 NetArpWaitTimerStart
= get_timer(0);
739 return 1; /* waiting */
741 debug_cond(DEBUG_DEV_PKT
, "sending UDP to %pI4/%pM\n",
743 NetSendPacket(NetTxPacket
, pkt_hdr_size
+ payload_len
);
744 return 0; /* transmitted */
748 #ifdef CONFIG_IP_DEFRAG
750 * This function collects fragments in a single packet, according
751 * to the algorithm in RFC815. It returns NULL or the pointer to
752 * a complete packet, in static storage
754 #ifndef CONFIG_NET_MAXDEFRAG
755 #define CONFIG_NET_MAXDEFRAG 16384
758 * MAXDEFRAG, above, is chosen in the config file and is real data
759 * so we need to add the NFS overhead, which is more than TFTP.
760 * To use sizeof in the internal unnamed structures, we need a real
761 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
762 * The compiler doesn't complain nor allocates the actual structure
764 static struct rpc_t rpc_specimen
;
765 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
767 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
770 * this is the packet being assembled, either data or frag control.
771 * Fragments go by 8 bytes, so this union must be 8 bytes long
774 /* first_byte is address of this structure */
775 u16 last_byte
; /* last byte in this hole + 1 (begin of next hole) */
776 u16 next_hole
; /* index of next (in 8-b blocks), 0 == none */
777 u16 prev_hole
; /* index of prev, 0 == none */
781 static struct ip_udp_hdr
*__NetDefragment(struct ip_udp_hdr
*ip
, int *lenp
)
783 static uchar pkt_buff
[IP_PKTSIZE
] __aligned(PKTALIGN
);
784 static u16 first_hole
, total_len
;
785 struct hole
*payload
, *thisfrag
, *h
, *newh
;
786 struct ip_udp_hdr
*localip
= (struct ip_udp_hdr
*)pkt_buff
;
787 uchar
*indata
= (uchar
*)ip
;
788 int offset8
, start
, len
, done
= 0;
789 u16 ip_off
= ntohs(ip
->ip_off
);
791 /* payload starts after IP header, this fragment is in there */
792 payload
= (struct hole
*)(pkt_buff
+ IP_HDR_SIZE
);
793 offset8
= (ip_off
& IP_OFFS
);
794 thisfrag
= payload
+ offset8
;
796 len
= ntohs(ip
->ip_len
) - IP_HDR_SIZE
;
798 if (start
+ len
> IP_MAXUDP
) /* fragment extends too far */
801 if (!total_len
|| localip
->ip_id
!= ip
->ip_id
) {
802 /* new (or different) packet, reset structs */
804 payload
[0].last_byte
= ~0;
805 payload
[0].next_hole
= 0;
806 payload
[0].prev_hole
= 0;
808 /* any IP header will work, copy the first we received */
809 memcpy(localip
, ip
, IP_HDR_SIZE
);
813 * What follows is the reassembly algorithm. We use the payload
814 * array as a linked list of hole descriptors, as each hole starts
815 * at a multiple of 8 bytes. However, last byte can be whatever value,
816 * so it is represented as byte count, not as 8-byte blocks.
819 h
= payload
+ first_hole
;
820 while (h
->last_byte
< start
) {
822 /* no hole that far away */
825 h
= payload
+ h
->next_hole
;
828 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
829 if (offset8
+ ((len
+ 7) / 8) <= h
- payload
) {
830 /* no overlap with holes (dup fragment?) */
834 if (!(ip_off
& IP_FLAGS_MFRAG
)) {
835 /* no more fragmentss: truncate this (last) hole */
836 total_len
= start
+ len
;
837 h
->last_byte
= start
+ len
;
841 * There is some overlap: fix the hole list. This code doesn't
842 * deal with a fragment that overlaps with two different holes
843 * (thus being a superset of a previously-received fragment).
846 if ((h
>= thisfrag
) && (h
->last_byte
<= start
+ len
)) {
847 /* complete overlap with hole: remove hole */
848 if (!h
->prev_hole
&& !h
->next_hole
) {
849 /* last remaining hole */
851 } else if (!h
->prev_hole
) {
853 first_hole
= h
->next_hole
;
854 payload
[h
->next_hole
].prev_hole
= 0;
855 } else if (!h
->next_hole
) {
857 payload
[h
->prev_hole
].next_hole
= 0;
859 /* in the middle of the list */
860 payload
[h
->next_hole
].prev_hole
= h
->prev_hole
;
861 payload
[h
->prev_hole
].next_hole
= h
->next_hole
;
864 } else if (h
->last_byte
<= start
+ len
) {
865 /* overlaps with final part of the hole: shorten this hole */
866 h
->last_byte
= start
;
868 } else if (h
>= thisfrag
) {
869 /* overlaps with initial part of the hole: move this hole */
870 newh
= thisfrag
+ (len
/ 8);
874 payload
[h
->next_hole
].prev_hole
= (h
- payload
);
876 payload
[h
->prev_hole
].next_hole
= (h
- payload
);
878 first_hole
= (h
- payload
);
881 /* fragment sits in the middle: split the hole */
882 newh
= thisfrag
+ (len
/ 8);
884 h
->last_byte
= start
;
885 h
->next_hole
= (newh
- payload
);
886 newh
->prev_hole
= (h
- payload
);
888 payload
[newh
->next_hole
].prev_hole
= (newh
- payload
);
891 /* finally copy this fragment and possibly return whole packet */
892 memcpy((uchar
*)thisfrag
, indata
+ IP_HDR_SIZE
, len
);
896 localip
->ip_len
= htons(total_len
);
897 *lenp
= total_len
+ IP_HDR_SIZE
;
901 static inline struct ip_udp_hdr
*NetDefragment(struct ip_udp_hdr
*ip
, int *lenp
)
903 u16 ip_off
= ntohs(ip
->ip_off
);
904 if (!(ip_off
& (IP_OFFS
| IP_FLAGS_MFRAG
)))
905 return ip
; /* not a fragment */
906 return __NetDefragment(ip
, lenp
);
909 #else /* !CONFIG_IP_DEFRAG */
911 static inline struct ip_udp_hdr
*NetDefragment(struct ip_udp_hdr
*ip
, int *lenp
)
913 u16 ip_off
= ntohs(ip
->ip_off
);
914 if (!(ip_off
& (IP_OFFS
| IP_FLAGS_MFRAG
)))
915 return ip
; /* not a fragment */
921 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
924 * @parma ip IP packet containing the ICMP
926 static void receive_icmp(struct ip_udp_hdr
*ip
, int len
,
927 IPaddr_t src_ip
, struct ethernet_hdr
*et
)
929 struct icmp_hdr
*icmph
= (struct icmp_hdr
*)&ip
->udp_src
;
931 switch (icmph
->type
) {
933 if (icmph
->code
!= ICMP_REDIR_HOST
)
935 printf(" ICMP Host Redirect to %pI4 ",
939 #if defined(CONFIG_CMD_PING)
940 ping_receive(et
, ip
, len
);
942 #ifdef CONFIG_CMD_TFTPPUT
943 if (packet_icmp_handler
)
944 packet_icmp_handler(icmph
->type
, icmph
->code
,
945 ntohs(ip
->udp_dst
), src_ip
, ntohs(ip
->udp_src
),
946 icmph
->un
.data
, ntohs(ip
->udp_len
));
953 NetReceive(uchar
*inpkt
, int len
)
955 struct ethernet_hdr
*et
;
956 struct ip_udp_hdr
*ip
;
960 #if defined(CONFIG_CMD_CDP)
963 ushort cti
= 0, vlanid
= VLAN_NONE
, myvlanid
, mynvlanid
;
965 debug_cond(DEBUG_NET_PKT
, "packet received\n");
968 NetRxPacketLen
= len
;
969 et
= (struct ethernet_hdr
*)inpkt
;
971 /* too small packet? */
972 if (len
< ETHER_HDR_SIZE
)
977 (*push_packet
)(inpkt
, len
);
982 #if defined(CONFIG_CMD_CDP)
983 /* keep track if packet is CDP */
984 iscdp
= is_cdp_packet(et
->et_dest
);
987 myvlanid
= ntohs(NetOurVLAN
);
988 if (myvlanid
== (ushort
)-1)
989 myvlanid
= VLAN_NONE
;
990 mynvlanid
= ntohs(NetOurNativeVLAN
);
991 if (mynvlanid
== (ushort
)-1)
992 mynvlanid
= VLAN_NONE
;
994 eth_proto
= ntohs(et
->et_protlen
);
996 if (eth_proto
< 1514) {
997 struct e802_hdr
*et802
= (struct e802_hdr
*)et
;
999 * Got a 802.2 packet. Check the other protocol field.
1000 * XXX VLAN over 802.2+SNAP not implemented!
1002 eth_proto
= ntohs(et802
->et_prot
);
1004 ip
= (struct ip_udp_hdr
*)(inpkt
+ E802_HDR_SIZE
);
1005 len
-= E802_HDR_SIZE
;
1007 } else if (eth_proto
!= PROT_VLAN
) { /* normal packet */
1008 ip
= (struct ip_udp_hdr
*)(inpkt
+ ETHER_HDR_SIZE
);
1009 len
-= ETHER_HDR_SIZE
;
1011 } else { /* VLAN packet */
1012 struct vlan_ethernet_hdr
*vet
=
1013 (struct vlan_ethernet_hdr
*)et
;
1015 debug_cond(DEBUG_NET_PKT
, "VLAN packet received\n");
1017 /* too small packet? */
1018 if (len
< VLAN_ETHER_HDR_SIZE
)
1021 /* if no VLAN active */
1022 if ((ntohs(NetOurVLAN
) & VLAN_IDMASK
) == VLAN_NONE
1023 #if defined(CONFIG_CMD_CDP)
1029 cti
= ntohs(vet
->vet_tag
);
1030 vlanid
= cti
& VLAN_IDMASK
;
1031 eth_proto
= ntohs(vet
->vet_type
);
1033 ip
= (struct ip_udp_hdr
*)(inpkt
+ VLAN_ETHER_HDR_SIZE
);
1034 len
-= VLAN_ETHER_HDR_SIZE
;
1037 debug_cond(DEBUG_NET_PKT
, "Receive from protocol 0x%x\n", eth_proto
);
1039 #if defined(CONFIG_CMD_CDP)
1041 cdp_receive((uchar
*)ip
, len
);
1046 if ((myvlanid
& VLAN_IDMASK
) != VLAN_NONE
) {
1047 if (vlanid
== VLAN_NONE
)
1048 vlanid
= (mynvlanid
& VLAN_IDMASK
);
1050 if (vlanid
!= (myvlanid
& VLAN_IDMASK
))
1054 switch (eth_proto
) {
1057 ArpReceive(et
, ip
, len
);
1060 #ifdef CONFIG_CMD_RARP
1062 rarp_receive(ip
, len
);
1066 debug_cond(DEBUG_NET_PKT
, "Got IP\n");
1067 /* Before we start poking the header, make sure it is there */
1068 if (len
< IP_UDP_HDR_SIZE
) {
1069 debug("len bad %d < %lu\n", len
,
1070 (ulong
)IP_UDP_HDR_SIZE
);
1073 /* Check the packet length */
1074 if (len
< ntohs(ip
->ip_len
)) {
1075 debug("len bad %d < %d\n", len
, ntohs(ip
->ip_len
));
1078 len
= ntohs(ip
->ip_len
);
1079 debug_cond(DEBUG_NET_PKT
, "len=%d, v=%02x\n",
1080 len
, ip
->ip_hl_v
& 0xff);
1082 /* Can't deal with anything except IPv4 */
1083 if ((ip
->ip_hl_v
& 0xf0) != 0x40)
1085 /* Can't deal with IP options (headers != 20 bytes) */
1086 if ((ip
->ip_hl_v
& 0x0f) > 0x05)
1088 /* Check the Checksum of the header */
1089 if (!NetCksumOk((uchar
*)ip
, IP_HDR_SIZE
/ 2)) {
1090 debug("checksum bad\n");
1093 /* If it is not for us, ignore it */
1094 dst_ip
= NetReadIP(&ip
->ip_dst
);
1095 if (NetOurIP
&& dst_ip
!= NetOurIP
&& dst_ip
!= 0xFFFFFFFF) {
1096 #ifdef CONFIG_MCAST_TFTP
1097 if (Mcast_addr
!= dst_ip
)
1101 /* Read source IP address for later use */
1102 src_ip
= NetReadIP(&ip
->ip_src
);
1104 * The function returns the unchanged packet if it's not
1105 * a fragment, and either the complete packet or NULL if
1106 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1108 ip
= NetDefragment(ip
, &len
);
1112 * watch for ICMP host redirects
1114 * There is no real handler code (yet). We just watch
1115 * for ICMP host redirect messages. In case anybody
1116 * sees these messages: please contact me
1117 * (wd@denx.de), or - even better - send me the
1118 * necessary fixes :-)
1120 * Note: in all cases where I have seen this so far
1121 * it was a problem with the router configuration,
1122 * for instance when a router was configured in the
1123 * BOOTP reply, but the TFTP server was on the same
1124 * subnet. So this is probably a warning that your
1125 * configuration might be wrong. But I'm not really
1126 * sure if there aren't any other situations.
1128 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1129 * we send a tftp packet to a dead connection, or when
1130 * there is no server at the other end.
1132 if (ip
->ip_p
== IPPROTO_ICMP
) {
1133 receive_icmp(ip
, len
, src_ip
, et
);
1135 } else if (ip
->ip_p
!= IPPROTO_UDP
) { /* Only UDP packets */
1139 debug_cond(DEBUG_DEV_PKT
,
1140 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1141 &dst_ip
, &src_ip
, len
);
1143 #ifdef CONFIG_UDP_CHECKSUM
1144 if (ip
->udp_xsum
!= 0) {
1150 xsum
+= (ntohs(ip
->udp_len
));
1151 xsum
+= (ntohl(ip
->ip_src
) >> 16) & 0x0000ffff;
1152 xsum
+= (ntohl(ip
->ip_src
) >> 0) & 0x0000ffff;
1153 xsum
+= (ntohl(ip
->ip_dst
) >> 16) & 0x0000ffff;
1154 xsum
+= (ntohl(ip
->ip_dst
) >> 0) & 0x0000ffff;
1156 sumlen
= ntohs(ip
->udp_len
);
1157 sumptr
= (ushort
*) &(ip
->udp_src
);
1159 while (sumlen
> 1) {
1162 sumdata
= *sumptr
++;
1163 xsum
+= ntohs(sumdata
);
1169 sumdata
= *(unsigned char *) sumptr
;
1170 sumdata
= (sumdata
<< 8) & 0xff00;
1173 while ((xsum
>> 16) != 0) {
1174 xsum
= (xsum
& 0x0000ffff) +
1175 ((xsum
>> 16) & 0x0000ffff);
1177 if ((xsum
!= 0x00000000) && (xsum
!= 0x0000ffff)) {
1178 printf(" UDP wrong checksum %08lx %08x\n",
1179 xsum
, ntohs(ip
->udp_xsum
));
1186 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1187 nc_input_packet((uchar
*)ip
+ IP_UDP_HDR_SIZE
,
1191 ntohs(ip
->udp_len
) - UDP_HDR_SIZE
);
1194 * IP header OK. Pass the packet to the current handler.
1196 (*udp_packet_handler
)((uchar
*)ip
+ IP_UDP_HDR_SIZE
,
1200 ntohs(ip
->udp_len
) - UDP_HDR_SIZE
);
1206 /**********************************************************************/
1208 static int net_check_prereq(enum proto_t protocol
)
1212 #if defined(CONFIG_CMD_PING)
1214 if (NetPingIP
== 0) {
1215 puts("*** ERROR: ping address not given\n");
1220 #if defined(CONFIG_CMD_SNTP)
1222 if (NetNtpServerIP
== 0) {
1223 puts("*** ERROR: NTP server address not given\n");
1228 #if defined(CONFIG_CMD_DNS)
1230 if (NetOurDNSIP
== 0) {
1231 puts("*** ERROR: DNS server address not given\n");
1236 #if defined(CONFIG_CMD_NFS)
1241 if (NetServerIP
== 0) {
1242 puts("*** ERROR: `serverip' not set\n");
1245 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1246 defined(CONFIG_CMD_DNS)
1253 if (NetOurIP
== 0) {
1254 puts("*** ERROR: `ipaddr' not set\n");
1259 #ifdef CONFIG_CMD_RARP
1266 if (memcmp(NetOurEther
, "\0\0\0\0\0\0", 6) == 0) {
1267 int num
= eth_get_dev_index();
1271 puts("*** ERROR: No ethernet found.\n");
1274 puts("*** ERROR: `ethaddr' not set\n");
1277 printf("*** ERROR: `eth%daddr' not set\n",
1291 /**********************************************************************/
1294 NetCksumOk(uchar
*ptr
, int len
)
1296 return !((NetCksum(ptr
, len
) + 1) & 0xfffe);
1301 NetCksum(uchar
*ptr
, int len
)
1304 ushort
*p
= (ushort
*)ptr
;
1309 xsum
= (xsum
& 0xffff) + (xsum
>> 16);
1310 xsum
= (xsum
& 0xffff) + (xsum
>> 16);
1311 return xsum
& 0xffff;
1319 myvlanid
= ntohs(NetOurVLAN
);
1320 if (myvlanid
== (ushort
)-1)
1321 myvlanid
= VLAN_NONE
;
1323 return ((myvlanid
& VLAN_IDMASK
) == VLAN_NONE
) ? ETHER_HDR_SIZE
:
1324 VLAN_ETHER_HDR_SIZE
;
1328 NetSetEther(uchar
*xet
, uchar
* addr
, uint prot
)
1330 struct ethernet_hdr
*et
= (struct ethernet_hdr
*)xet
;
1333 myvlanid
= ntohs(NetOurVLAN
);
1334 if (myvlanid
== (ushort
)-1)
1335 myvlanid
= VLAN_NONE
;
1337 memcpy(et
->et_dest
, addr
, 6);
1338 memcpy(et
->et_src
, NetOurEther
, 6);
1339 if ((myvlanid
& VLAN_IDMASK
) == VLAN_NONE
) {
1340 et
->et_protlen
= htons(prot
);
1341 return ETHER_HDR_SIZE
;
1343 struct vlan_ethernet_hdr
*vet
=
1344 (struct vlan_ethernet_hdr
*)xet
;
1346 vet
->vet_vlan_type
= htons(PROT_VLAN
);
1347 vet
->vet_tag
= htons((0 << 5) | (myvlanid
& VLAN_IDMASK
));
1348 vet
->vet_type
= htons(prot
);
1349 return VLAN_ETHER_HDR_SIZE
;
1353 int net_update_ether(struct ethernet_hdr
*et
, uchar
*addr
, uint prot
)
1357 memcpy(et
->et_dest
, addr
, 6);
1358 memcpy(et
->et_src
, NetOurEther
, 6);
1359 protlen
= ntohs(et
->et_protlen
);
1360 if (protlen
== PROT_VLAN
) {
1361 struct vlan_ethernet_hdr
*vet
=
1362 (struct vlan_ethernet_hdr
*)et
;
1363 vet
->vet_type
= htons(prot
);
1364 return VLAN_ETHER_HDR_SIZE
;
1365 } else if (protlen
> 1514) {
1366 et
->et_protlen
= htons(prot
);
1367 return ETHER_HDR_SIZE
;
1370 struct e802_hdr
*et802
= (struct e802_hdr
*)et
;
1371 et802
->et_prot
= htons(prot
);
1372 return E802_HDR_SIZE
;
1376 void net_set_ip_header(uchar
*pkt
, IPaddr_t dest
, IPaddr_t source
)
1378 struct ip_udp_hdr
*ip
= (struct ip_udp_hdr
*)pkt
;
1381 * Construct an IP header.
1383 /* IP_HDR_SIZE / 4 (not including UDP) */
1386 ip
->ip_len
= htons(IP_HDR_SIZE
);
1387 ip
->ip_id
= htons(NetIPID
++);
1388 ip
->ip_off
= htons(IP_FLAGS_DFRAG
); /* Don't fragment */
1391 /* already in network byte order */
1392 NetCopyIP((void *)&ip
->ip_src
, &source
);
1393 /* already in network byte order */
1394 NetCopyIP((void *)&ip
->ip_dst
, &dest
);
1397 void net_set_udp_header(uchar
*pkt
, IPaddr_t dest
, int dport
, int sport
,
1400 struct ip_udp_hdr
*ip
= (struct ip_udp_hdr
*)pkt
;
1403 * If the data is an odd number of bytes, zero the
1404 * byte after the last byte so that the checksum
1408 pkt
[IP_UDP_HDR_SIZE
+ len
] = 0;
1410 net_set_ip_header(pkt
, dest
, NetOurIP
);
1411 ip
->ip_len
= htons(IP_UDP_HDR_SIZE
+ len
);
1412 ip
->ip_p
= IPPROTO_UDP
;
1413 ip
->ip_sum
= ~NetCksum((uchar
*)ip
, IP_HDR_SIZE
>> 1);
1415 ip
->udp_src
= htons(sport
);
1416 ip
->udp_dst
= htons(dport
);
1417 ip
->udp_len
= htons(UDP_HDR_SIZE
+ len
);
1421 void copy_filename(char *dst
, const char *src
, int size
)
1423 if (*src
&& (*src
== '"')) {
1428 while ((--size
> 0) && *src
&& (*src
!= '"'))
1433 #if defined(CONFIG_CMD_NFS) || \
1434 defined(CONFIG_CMD_SNTP) || \
1435 defined(CONFIG_CMD_DNS)
1437 * make port a little random (1024-17407)
1438 * This keeps the math somewhat trivial to compute, and seems to work with
1439 * all supported protocols/clients/servers
1441 unsigned int random_port(void)
1443 return 1024 + (get_timer(0) % 0x4000);
1447 void ip_to_string(IPaddr_t x
, char *s
)
1450 sprintf(s
, "%d.%d.%d.%d",
1451 (int) ((x
>> 24) & 0xff),
1452 (int) ((x
>> 16) & 0xff),
1453 (int) ((x
>> 8) & 0xff), (int) ((x
>> 0) & 0xff)
1457 void VLAN_to_string(ushort x
, char *s
)
1461 if (x
== (ushort
)-1)
1467 sprintf(s
, "%d", x
& VLAN_IDMASK
);
1470 ushort
string_to_VLAN(const char *s
)
1475 return htons(VLAN_NONE
);
1477 if (*s
< '0' || *s
> '9')
1480 id
= (ushort
)simple_strtoul(s
, NULL
, 10);
1485 ushort
getenv_VLAN(char *var
)
1487 return string_to_VLAN(getenv(var
));