[PATCH 11/11] net: dhcp: introduce global serverip variable

[Wolfram Sang]

Sometimes, the TFTP/NFS server is different from the DHCP server. To handle
such situations, a global 'serverip' variable is introduced. If present and set
with a valid IP address, it will be used instead of the address returned by the
DHCP server.

Signed-off-by: Wolfram Sang <w.sang at pengutronix.de>
---
 defaultenv/config |    3 ++-
 net/dhcp.c        |    7 +++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/defaultenv/config b/defaultenv/config
index 0aaead5..235deca 100644
--- a/defaultenv/config
+++ b/defaultenv/config
@@ -9,11 +9,12 @@ machine=FIXME
 # use 'dhcp' to do dhcp in barebox and in kernel
 # use 'none' if you want to skip kernel ip autoconfiguration
 ip=dhcp
+# IP of the TFTP/NFS-server. If empty (or invalid), DHCP server will be used
+#serverip=a.b.c.d
 
 # or set your networking parameters here
 #eth0.ipaddr=a.b.c.d
 #eth0.netmask=a.b.c.d
-#eth0.serverip=a.b.c.d
 #eth0.gateway=a.b.c.d
 
 # can be either 'tftp', 'nfs', 'nand', 'nor' or 'disk'
diff --git a/net/dhcp.c b/net/dhcp.c
index d1781bc..899c873 100644
--- a/net/dhcp.c
+++ b/net/dhcp.c
@@ -113,8 +113,11 @@ static void bootp_copy_net_params(struct bootp *bp)
 	tmp_ip = net_read_ip(&bp->bp_yiaddr);
 	net_set_ip(tmp_ip);
 
-	tmp_ip = net_read_ip(&bp->bp_siaddr);
-	if (tmp_ip != 0)
+	tmp_ip = getenv_ip("serverip");
+	if (!tmp_ip)
+		tmp_ip = net_read_ip(&bp->bp_siaddr);
+
+	if (tmp_ip)
 		net_set_serverip(tmp_ip);
 
 	if (strlen(bp->bp_file) > 0)
-- 
1.7.5.4