DHCP: Avoid mis-aligned BOOTP structure

This was caused by the recent change to pass back the frame header.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/dhcp.c b/src/dhcp.c
index 879ce3e5..3fd72f85 100644
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -3494,8 +3494,9 @@ dhcp_packet(struct interface *ifp, uint8_t *data, size_t len)
 			    __func__, ifp->name);
 			return;
 		}
-		data += fl;
 		len -= fl;
+		/* Move the data to avoid alignment errors. */
+		memmove(data, data + fl, len);
 	}
 
 	/* Validate filter. */