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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 09/27] net: dhcp: Do not overwrite serverip if it is valid
Date: Fri,  1 Dec 2017 12:22:38 +0100	[thread overview]
Message-ID: <20171201112256.20196-10-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20171201112256.20196-1-s.hauer@pengutronix.de>

Some DHCP servers provide the wrong serverip in which case
it is desired to specify it manually and won't let the dhcp
command overwrite it.
This has previously been done by setting the serverip again
to the desired value after dhcp has been executed. With this
patch we do not overwrite it in the first place if it is valid
already. This is necessary when the serverip is not set via
/env/network/eth* but via nv.net.server.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 include/net.h | 1 +
 net/dhcp.c    | 4 ++--
 net/ifup.c    | 9 ++++++---
 net/net.c     | 8 ++++++++
 4 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/include/net.h b/include/net.h
index 37ddf2db18..06390732fb 100644
--- a/include/net.h
+++ b/include/net.h
@@ -217,6 +217,7 @@ extern unsigned char *NetRxPackets[PKTBUFSRX];/* Receive packets		*/
 
 void net_set_ip(IPaddr_t ip);
 void net_set_serverip(IPaddr_t ip);
+void net_set_serverip_empty(IPaddr_t ip);
 void net_set_netmask(IPaddr_t ip);
 void net_set_gateway(IPaddr_t ip);
 void net_set_nameserver(IPaddr_t ip);
diff --git a/net/dhcp.c b/net/dhcp.c
index 68696d69e8..37aad8f1ff 100644
--- a/net/dhcp.c
+++ b/net/dhcp.c
@@ -373,7 +373,7 @@ static void bootp_copy_net_params(struct bootp *bp)
 
 	tmp_ip = net_read_ip(&bp->bp_siaddr);
 	if (tmp_ip != 0)
-		net_set_serverip(tmp_ip);
+		net_set_serverip_empty(tmp_ip);
 
 	if (strlen(bp->bp_file) > 0) {
 		if (IS_ENABLED(CONFIG_ENVIRONMENT_VARIABLES))
@@ -702,7 +702,7 @@ int dhcp(int retries, struct dhcp_req_param *param)
 	if (dhcp_tftpname[0] != 0) {
 		IPaddr_t tftpserver = resolv(dhcp_tftpname);
 		if (tftpserver)
-			net_set_serverip(tftpserver);
+			net_set_serverip_empty(tftpserver);
 	}
 
 out1:
diff --git a/net/ifup.c b/net/ifup.c
index 2b13a9f140..2d1feeb74a 100644
--- a/net/ifup.c
+++ b/net/ifup.c
@@ -100,12 +100,15 @@ int ifup(const char *name, unsigned flags)
 		ip = "";
 
 	if (!strcmp(ip, "dhcp")) {
+		IPaddr_t serverip;
+
+		serverip = getenv_ip("serverip");
+		if (serverip)
+			net_set_serverip_empty(serverip);
+
 		ret = run_command("dhcp");
 		if (ret)
 			goto out;
-		ret = eth_set_param(dev, "serverip");
-		if (ret)
-			goto out;
 		dev_set_param(dev, "linux.bootargs", "ip=dhcp");
 	} else if (!strcmp(ip, "static")) {
 		char *bootarg;
diff --git a/net/net.c b/net/net.c
index 5e6e8f1940..10ddd61879 100644
--- a/net/net.c
+++ b/net/net.c
@@ -253,6 +253,14 @@ void net_set_serverip(IPaddr_t ip)
 	net_serverip = ip;
 }
 
+void net_set_serverip_empty(IPaddr_t ip)
+{
+	if (net_serverip)
+		return;
+
+	net_set_serverip(ip);
+}
+
 void net_set_ip(IPaddr_t ip)
 {
 	struct eth_device *edev = eth_get_current();
-- 
2.11.0


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  parent reply	other threads:[~2017-12-01 11:23 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-01 11:22 [PATCH v2] Networking updates Sascha Hauer
2017-12-01 11:22 ` [PATCH 01/27] detect command: Drop -e option Sascha Hauer
2017-12-01 11:22 ` [PATCH 02/27] driver: Add device_detect_all() function Sascha Hauer
2017-12-01 11:22 ` [PATCH 03/27] nvvar: when setting a nvvar to NULL just free the content Sascha Hauer
2017-12-01 11:22 ` [PATCH 04/27] net: use pr_* functions for messages Sascha Hauer
2017-12-01 11:22 ` [PATCH 05/27] net: Add and use IP_BROADCAST Sascha Hauer
2017-12-01 11:22 ` [PATCH 06/27] net: Make domainname and nameserver globalvars Sascha Hauer
2017-12-01 11:22 ` [PATCH 07/27] net: Add functions to get/set nameserver and domainname Sascha Hauer
2017-12-01 11:22 ` [PATCH 08/27] net: introduce global.net.server Sascha Hauer
2017-12-01 11:22 ` Sascha Hauer [this message]
2017-12-01 11:22 ` [PATCH 10/27] net: Use a single gateway Sascha Hauer
2017-12-01 11:22 ` [PATCH 11/27] net: allow udp connections on specified network device Sascha Hauer
2017-12-01 11:22 ` [PATCH 12/27] net: dhcp: Allow to specify " Sascha Hauer
2017-12-01 11:22 ` [PATCH 13/27] net: dhcp: avoid unnecessary casts Sascha Hauer
2017-12-01 11:22 ` [PATCH 14/27] net: dhcp: Coding style fixes Sascha Hauer
2017-12-01 11:22 ` [PATCH 15/27] net: dhcp: rework Sascha Hauer
2017-12-08 21:56   ` Oleksij Rempel
2017-12-01 11:22 ` [PATCH 16/27] net: Pick network device based on IP settings Sascha Hauer
2017-12-01 11:22 ` [PATCH 17/27] net: remove "current" network device Sascha Hauer
2017-12-01 11:22 ` [PATCH 18/27] net: ifup: Factor out a eth_discover function Sascha Hauer
2017-12-01 11:22 ` [PATCH 19/27] ifup: Use dhcp C API rather than running command Sascha Hauer
2017-12-01 11:22 ` [PATCH 20/27] net: Provide new way to configure network devices Sascha Hauer
2017-12-01 11:22 ` [PATCH 21/27] net: update network docs Sascha Hauer
2017-12-01 11:22 ` [PATCH 22/27] net: environment: remove ethx setup files Sascha Hauer
2017-12-01 11:22 ` [PATCH 23/27] net: environment: update automounts Sascha Hauer
2017-12-01 11:22 ` [PATCH 24/27] defaultenv: Add README for new network config Sascha Hauer
2017-12-01 11:22 ` [PATCH 25/27] net: Add linuxdevname property Sascha Hauer
2017-12-01 11:22 ` [PATCH 26/27] commands: Add ip_route_add command Sascha Hauer
2017-12-01 11:22 ` [PATCH 27/27] defaultenv-2: set bootargs correctly for network boot Sascha Hauer

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