router: fix interface mtu read error

Use integer type for mtu variable as odhcpd_get_interface_config returns
-1 when it fails to read the interface mtu. This allows to set the mtu
to a meaningfull value of 1280 in case of interface mtu read failure.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/odhcpd.h b/src/odhcpd.h
index bb4702e..ecb7d9a 100644
--- a/src/odhcpd.h
+++ b/src/odhcpd.h
@@ -165,7 +165,7 @@ struct interface {
 	uint32_t ra_reachabletime;
 	uint32_t ra_retranstime;
 	uint32_t ra_hoplimit;
-	uint32_t ra_mtu;
+	int ra_mtu;
 
 	// DHCPv4
 	struct in_addr dhcpv4_start;