From: Roy Marples <roy@marples.name>
Date: Mon, 29 Apr 2019 16:32:53 +0000 (+0100)
Subject: dhcp: Ensure that we have DHCP running on the receiving interface
X-Git-Tag: v7.2.2~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=640ac214194d32a0696d1a64569ea82365a7af0c;p=thirdparty%2Fdhcpcd.git

dhcp: Ensure that we have DHCP running on the receiving interface

... before trying to process the received BOOTP message on it.
---

diff --git a/src/dhcp.c b/src/dhcp.c
index f24d14f6..8291dd23 100644
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -3499,6 +3499,11 @@ dhcp_readudp(struct dhcpcd_ctx *ctx, struct interface *ifp)
 			logerr(__func__);
 			return;
 		}
+		if (D_CSTATE(ifp) == NULL) {
+			logdebugx("%s: received BOOTP for inactive interface",
+			    ifp->name);
+			return;
+		}
 	}
 
 	dhcp_handlebootp(ifp, (struct bootp *)buf, (size_t)bytes,