From 1a32bf41881b5dbe3119cb77a33572b4d462cabf Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Mon, 20 Jul 2009 14:53:54 -0400 Subject: Add DNS support 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 Signed-off-by: Pieter Voorthuijsen Signed-off-by: Ben Warren --- net/net.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'net/net.c') diff --git a/net/net.c b/net/net.c index e215fd8d9..4bbe5313c 100644 --- a/net/net.c +++ b/net/net.c @@ -92,6 +92,9 @@ #if defined(CONFIG_CDP_VERSION) #include #endif +#if defined(CONFIG_CMD_DNS) +#include "dns.h" +#endif #if defined(CONFIG_CMD_NET) @@ -291,6 +294,9 @@ NetInitLoop(proto_t protocol) NetServerIP = getenv_IPaddr ("serverip"); NetOurNativeVLAN = getenv_VLAN("nvlan"); NetOurVLAN = getenv_VLAN("vlan"); +#if defined(CONFIG_CMD_DNS) + NetOurDNSIP = getenv_IPaddr("dnsip"); +#endif env_changed_id = env_id; } @@ -425,6 +431,11 @@ restart: case SNTP: SntpStart(); break; +#endif +#if defined(CONFIG_CMD_DNS) + case DNS: + DnsStart(); + break; #endif default: break; @@ -1518,6 +1529,14 @@ static int net_check_prereq (proto_t protocol) } goto common; #endif +#if defined(CONFIG_CMD_DNS) + case DNS: + if (NetOurDNSIP == 0) { + puts("*** ERROR: DNS server address not given\n"); + return 1; + } + goto common; +#endif #if defined(CONFIG_CMD_NFS) case NFS: #endif @@ -1681,6 +1700,16 @@ void copy_filename (char *dst, char *src, int size) #endif +#if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS) +/* + * make port a little random, but use something trivial to compute + */ +unsigned int random_port(void) +{ + return 1024 + (get_timer(0) % 0x8000);; +} +#endif + void ip_to_string (IPaddr_t x, char *s) { x = ntohl (x); -- cgit v1.2.3