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ac3f26cc15
Peter originally sent a fix, but it breaks a number of other things. This addresses the original reported issue in a different way. That report was: > U-Boot has 1 common buffer to send Ethernet frames, pointed to by > net_tx_packet. When sending to an IP address without knowing the MAC > address, U-Boot makes an ARP request (using the arp_tx_packet buffer) > to find out the MAC address of the IP addressr. When a matching ARP > reply is received, U-Boot continues sending the frame stored in the > net_tx_packet buffer. > > However, in the mean time, if U-Boot needs to send out any network > packets (e.g. replying ping packets or ARP requests for its own IP > address etc.), it will use the net_tx_packet buffer to prepare the > new packet. Thus this buffer is no longer the original packet meant > to be transmitted after the ARP reply. The original packet will be > lost. This instead uses the ARP tx buffer to send async replies in the case where we are actively waiting for an ARP reply. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Reported-by: Tran Tien Dat <peter.trantiendat@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
33 lines
864 B
C
33 lines
864 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copied from Linux Monitor (LiMon) - Networking.
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*
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* Copyright 1994 - 2000 Neil Russell.
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* (See License)
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* Copyright 2000 Roland Borde
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* Copyright 2000 Paolo Scaffardi
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* Copyright 2000-2002 Wolfgang Denk, wd@denx.de
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*/
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#ifndef __ARP_H__
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#define __ARP_H__
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#include <common.h>
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extern struct in_addr net_arp_wait_packet_ip;
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/* MAC address of waiting packet's destination */
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extern uchar *arp_wait_packet_ethaddr;
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extern int arp_wait_tx_packet_size;
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extern ulong arp_wait_timer_start;
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extern int arp_wait_try;
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extern uchar *arp_tx_packet;
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void arp_init(void);
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void arp_request(void);
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void arp_raw_request(struct in_addr source_ip, const uchar *targetEther,
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struct in_addr target_ip);
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int arp_timeout_check(void);
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void arp_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len);
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#endif /* __ARP_H__ */
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