+const uint8_t MAC_BCAST_ADDR[6] ALIGN2 = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};
+
+/* Supported options are easily added here.
+ * See RFC2132 for more options.
+ * OPTION_REQ: these options are requested by udhcpc (unless -o).
+ */
+const struct dhcp_optflag dhcp_optflags[] = {
+ /* flags code */
+ { OPTION_IP | OPTION_REQ, 0x01 }, /* DHCP_SUBNET */
+ { OPTION_S32 , 0x02 }, /* DHCP_TIME_OFFSET */
+ { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03 }, /* DHCP_ROUTER */
+// { OPTION_IP | OPTION_LIST , 0x04 }, /* DHCP_TIME_SERVER */
+// { OPTION_IP | OPTION_LIST , 0x05 }, /* DHCP_NAME_SERVER */
+ { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06 }, /* DHCP_DNS_SERVER */
+// { OPTION_IP | OPTION_LIST , 0x07 }, /* DHCP_LOG_SERVER */
+// { OPTION_IP | OPTION_LIST , 0x08 }, /* DHCP_COOKIE_SERVER */
+ { OPTION_IP | OPTION_LIST , 0x09 }, /* DHCP_LPR_SERVER */
+ { OPTION_STRING_HOST | OPTION_REQ, 0x0c }, /* DHCP_HOST_NAME */
+ { OPTION_U16 , 0x0d }, /* DHCP_BOOT_SIZE */
+ { OPTION_STRING_HOST | OPTION_REQ, 0x0f }, /* DHCP_DOMAIN_NAME */
+ { OPTION_IP , 0x10 }, /* DHCP_SWAP_SERVER */
+ { OPTION_STRING , 0x11 }, /* DHCP_ROOT_PATH */
+ { OPTION_U8 , 0x17 }, /* DHCP_IP_TTL */
+ { OPTION_U16 , 0x1a }, /* DHCP_MTU */
+//TODO: why do we request DHCP_BROADCAST? Can't we assume that
+//in the unlikely case it is different from typical N.N.255.255,
+//server would let us know anyway?
+ { OPTION_IP | OPTION_REQ, 0x1c }, /* DHCP_BROADCAST */
+ { OPTION_IP_PAIR | OPTION_LIST , 0x21 }, /* DHCP_ROUTES */
+ { OPTION_STRING_HOST , 0x28 }, /* DHCP_NIS_DOMAIN */
+ { OPTION_IP | OPTION_LIST , 0x29 }, /* DHCP_NIS_SERVER */
+ { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a }, /* DHCP_NTP_SERVER */
+ { OPTION_IP | OPTION_LIST , 0x2c }, /* DHCP_WINS_SERVER */
+ { OPTION_U32 , 0x33 }, /* DHCP_LEASE_TIME */
+ { OPTION_IP , 0x36 }, /* DHCP_SERVER_ID */
+ { OPTION_STRING , 0x38 }, /* DHCP_ERR_MESSAGE */
+//TODO: must be combined with 'sname' and 'file' handling:
+ { OPTION_STRING_HOST , 0x42 }, /* DHCP_TFTP_SERVER_NAME */
+ { OPTION_STRING , 0x43 }, /* DHCP_BOOT_FILE */
+//TODO: not a string, but a set of LASCII strings:
+// { OPTION_STRING , 0x4D }, /* DHCP_USER_CLASS */
+#if ENABLE_FEATURE_UDHCP_RFC3397
+ { OPTION_DNS_STRING | OPTION_LIST , 0x77 }, /* DHCP_DOMAIN_SEARCH */
+ { OPTION_SIP_SERVERS , 0x78 }, /* DHCP_SIP_SERVERS */
+#endif
+ { OPTION_STATIC_ROUTES | OPTION_LIST , 0x79 }, /* DHCP_STATIC_ROUTES */
+#if ENABLE_FEATURE_UDHCP_8021Q
+ { OPTION_U16 , 0x84 }, /* DHCP_VLAN_ID */
+ { OPTION_U8 , 0x85 }, /* DHCP_VLAN_PRIORITY */
+#endif
+ { OPTION_STRING , 0xd1 }, /* DHCP_PXE_CONF_FILE */
+ { OPTION_6RD , 0xd4 }, /* DHCP_6RD */
+ { OPTION_STATIC_ROUTES | OPTION_LIST , 0xf9 }, /* DHCP_MS_STATIC_ROUTES */
+ { OPTION_STRING , 0xfc }, /* DHCP_WPAD */
+
+ /* Options below have no match in dhcp_option_strings[],
+ * are not passed to dhcpc scripts, and cannot be specified
+ * with "option XXX YYY" syntax in dhcpd config file.
+ * These entries are only used internally by udhcp[cd]
+ * to correctly encode options into packets.
+ */
+
+ { OPTION_IP , 0x32 }, /* DHCP_REQUESTED_IP */
+ { OPTION_U8 , 0x35 }, /* DHCP_MESSAGE_TYPE */
+ { OPTION_U16 , 0x39 }, /* DHCP_MAX_SIZE */
+//looks like these opts will work just fine even without these defs:
+// { OPTION_STRING , 0x3c }, /* DHCP_VENDOR */
+// /* not really a string: */
+// { OPTION_STRING , 0x3d }, /* DHCP_CLIENT_ID */
+ { 0, 0 } /* zeroed terminating entry */
+};