From: Roy Marples <roy@marples.name>
Date: Fri, 23 Mar 2007 10:02:02 +0000 (+0000)
Subject: When MTU is less than 576 we now ignore it instead of setting the MTU to 576.
X-Git-Tag: v3.2.3~299
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1f33c4a5f66b7c834a816080143137063f529bbb;p=thirdparty%2Fdhcpcd.git

When MTU is less than 576 we now ignore it instead of setting the MTU to 576.
---

diff --git a/ChangeLog b/ChangeLog
index 46da5318..4a7e6a6c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,5 @@
 When we get an invalid length for a DHCP option, try and continue anyway.
+When MTU is less than 576 we now ignore it instead of setting the MTU to 576.
 
 dhcpcd-3.0.16
 RFC 2131 is full of confusion regarding MTU it seems as the effective minimum
diff --git a/dhcp.c b/dhcp.c
index 95ec84b7..d1c42201 100644
--- a/dhcp.c
+++ b/dhcp.c
@@ -611,8 +611,8 @@ int parse_dhcpmessage (dhcp_t *dhcp, const dhcpmessage_t *message)
 	     In practise it's 576 (minimum maximum message size) */
 	  if (dhcp->mtu < MTU_MIN)
 	    {
-	      logger (LOG_ERR, "given MTU %d is too low, minium is %d", dhcp->mtu, MTU_MIN);
-	      dhcp->mtu = MTU_MIN;
+	      logger (LOG_DEBUG, "MTU %d is too low, minium is %d; ignoring", dhcp->mtu, MTU_MIN);
+	      dhcp->mtu = 0;
 	    }
 	  break;