udhcpc: fix truncation of last char in client hostnames

diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
index 6e1398d..e17fb9e 100644 (file)
--- a/networking/udhcp/leases.c
+++ b/networking/udhcp/leases.c
@@ -63,7 +63,8 @@ struct dhcpOfferedAddr* FAST_FUNC add_lease(
        if (oldest) {
                oldest->hostname[0] = '\0';
                if (hostname) {
-                       hostname_length = hostname[-1]; /* look at option size byte */
+                       /* option size byte, + 1 for NUL */
+                       hostname_length = hostname[-1] + 1;
                        if (hostname_length > sizeof(oldest->hostname))
                                hostname_length = sizeof(oldest->hostname);
                        hostname = (uint8_t*) safe_strncpy((char*)oldest->hostname, (char*)hostname, hostname_length);