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-rw-r--r--net/bootp.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bootp.c b/net/bootp.c
index e679f8b..1a71786 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -456,6 +456,10 @@ static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t R
*e++ = 42;
*cnt += 1;
#endif
+ /* no options, so back up to avoid sending an empty request list */
+ if (*cnt == 0)
+ e -= 2;
+
*e++ = 255; /* End of the list */
/* Pad to minimal length */