704f3acfcf
PXE boot is broken with GCC 7.1 due option '-fstore-merging' enabled by default for '-O2': BOOTP broadcast 1 data abort pc : [<8ff8bb30>] lr : [<00004f1f>] reloc pc : [<17832b30>] lr : [<878abf1f>] sp : 8f558bc0 ip : 00000000 fp : 8ffef5a4 r10: 8ffed248 r9 : 8f558ee0 r8 : 8ffef594 r7 : 0000000e r6 : 8ffed700 r5 : 00000000 r4 : 8ffed74e r3 : 00060101 r2 : 8ffed230 r1 : 8ffed706 r0 : 00000ddd Flags: nzcv IRQs off FIQs off Mode SVC_32 Resetting CPU ... Core reason is usage of structures for network headers without packed attribute. Reviewed-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com> Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
37 lines
792 B
C
37 lines
792 B
C
/*
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* (C) Masami Komiya <mkomiya@sonare.it> 2005
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* Copyright 2009, Robin Getz <rgetz@blackfin.uclinux.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __DNS_H__
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#define __DNS_H__
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#define DNS_SERVICE_PORT 53
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#define DNS_TIMEOUT 10000UL
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/* http://en.wikipedia.org/wiki/List_of_DNS_record_types */
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enum dns_query_type {
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DNS_A_RECORD = 0x01,
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DNS_CNAME_RECORD = 0x05,
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DNS_MX_RECORD = 0x0f,
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};
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/*
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* DNS network packet
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*/
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struct header {
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uint16_t tid; /* Transaction ID */
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uint16_t flags; /* Flags */
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uint16_t nqueries; /* Questions */
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uint16_t nanswers; /* Answers */
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uint16_t nauth; /* Authority PRs */
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uint16_t nother; /* Other PRs */
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unsigned char data[1]; /* Data, variable length */
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} __attribute__((packed));
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void dns_start(void); /* Begin DNS */
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#endif
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