mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
1a32bf4188
On 04 Oct 2008 Pieter posted a dns implementation for U-Boot. http://www.mail-archive.com/u-boot-users@lists.sourceforge.net/msg10216.html > > DNS can be enabled by setting CFG_CMD_DNS. After performing a query, > the serverip environment var is updated. > > Probably there are some cosmetic issues with the patch. Unfortunatly I > do not have the time to correct these. So if anybody else likes DNS > support in U-Boot and has the time, feel free to patch it in the main tree. Here it is again - slightly modified & smaller: - update to 2009-06 (Pieter's patch was for U-Boot 1.2.0) - README.dns is added - syntax is changed (now takes a third option, the env var to store the result in) - add a random port() function in net.c - sort Makefile in ./net/Makefile - dns just returns unless a env var is given - run through checkpatch, and clean up style issues - remove packet from stack - cleaned up some comments - failure returns much faster (if server responds, don't wait for timeout) - use built in functions (memcpy) rather than byte copy. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Pieter Voorthuijsen <pieter.voorthuijsen@prodrive.nl> Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
39 lines
974 B
C
39 lines
974 B
C
/*
|
|
* (C) Masami Komiya <mkomiya@sonare.it> 2005
|
|
* Copyright 2009, Robin Getz <rgetz@blackfin.uclinux.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2, or (at
|
|
* your option) any later version.
|
|
*/
|
|
|
|
#ifndef __DNS_H__
|
|
#define __DNS_H__
|
|
|
|
#define DNS_SERVICE_PORT 53
|
|
#define DNS_TIMEOUT 10000UL
|
|
|
|
/* http://en.wikipedia.org/wiki/List_of_DNS_record_types */
|
|
enum dns_query_type {
|
|
DNS_A_RECORD = 0x01,
|
|
DNS_CNAME_RECORD = 0x05,
|
|
DNS_MX_RECORD = 0x0f,
|
|
};
|
|
|
|
/*
|
|
* DNS network packet
|
|
*/
|
|
struct header {
|
|
uint16_t tid; /* Transaction ID */
|
|
uint16_t flags; /* Flags */
|
|
uint16_t nqueries; /* Questions */
|
|
uint16_t nanswers; /* Answers */
|
|
uint16_t nauth; /* Authority PRs */
|
|
uint16_t nother; /* Other PRs */
|
|
unsigned char data[1]; /* Data, variable length */
|
|
};
|
|
|
|
extern void DnsStart(void); /* Begin DNS */
|
|
|
|
#endif
|