1 /* vi: set sw=4 ts=4: */
3 #ifndef UDHCP_OPTIONS_H
4 #define UDHCP_OPTIONS_H 1
6 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
14 #if ENABLE_FEATURE_UDHCP_RFC3397
15 OPTION_STR1035, /* RFC1035 compressed domain name list */
26 /* Client requests this option by default */
27 #define OPTION_REQ 0x10
28 /* There can be a list of 1 or more of these */
29 #define OPTION_LIST 0x20
31 /*****************************************************************/
32 /* Do not modify below here unless you know what you are doing!! */
33 /*****************************************************************/
35 /* DHCP protocol. See RFC 2131 */
36 #define DHCP_MAGIC 0x63825363
38 /* DHCP option codes (partial list). See RFC 2132 and
39 * http://www.iana.org/assignments/bootp-dhcp-parameters/
40 * Commented out options are handled by common option machinery,
41 * uncommented ones have spacial cases (grep for them to see).
43 #define DHCP_PADDING 0x00
44 #define DHCP_SUBNET 0x01
45 //#define DHCP_TIME_OFFSET 0x02 /* (localtime - UTC_time) in seconds. signed */
46 //#define DHCP_ROUTER 0x03
47 //#define DHCP_TIME_SERVER 0x04 /* RFC 868 time server (32-bit, 0 = 1.1.1900) */
48 //#define DHCP_NAME_SERVER 0x05 /* IEN 116 _really_ ancient kind of NS */
49 //#define DHCP_DNS_SERVER 0x06
50 //#define DHCP_LOG_SERVER 0x07 /* port 704 UDP log (not syslog)
51 //#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" server */
52 //#define DHCP_LPR_SERVER 0x09
53 #define DHCP_HOST_NAME 0x0c /* either client informs server or server gives name to client */
54 //#define DHCP_BOOT_SIZE 0x0d
55 //#define DHCP_DOMAIN_NAME 0x0f /* server gives domain suffix */
56 //#define DHCP_SWAP_SERVER 0x10
57 //#define DHCP_ROOT_PATH 0x11
58 //#define DHCP_IP_TTL 0x17
59 //#define DHCP_MTU 0x1a
60 //#define DHCP_BROADCAST 0x1c
61 //#define DHCP_NIS_DOMAIN 0x28
62 //#define DHCP_NIS_SERVER 0x29
63 //#define DHCP_NTP_SERVER 0x2a
64 //#define DHCP_WINS_SERVER 0x2c
65 #define DHCP_REQUESTED_IP 0x32 /* sent by client if specific IP is wanted */
66 #define DHCP_LEASE_TIME 0x33
67 #define DHCP_OPTION_OVERLOAD 0x34
68 #define DHCP_MESSAGE_TYPE 0x35
69 #define DHCP_SERVER_ID 0x36 /* by default server's IP */
70 #define DHCP_PARAM_REQ 0x37 /* list of options client wants */
71 //#define DHCP_ERR_MESSAGE 0x38 /* error message when sending NAK etc */
72 #define DHCP_MAX_SIZE 0x39
73 #define DHCP_VENDOR 0x3c /* client's vendor (a string) */
74 #define DHCP_CLIENT_ID 0x3d /* by default client's MAC addr, but may be arbitrarily long */
75 //#define DHCP_TFTP_SERVER_NAME 0x42 /* same as 'sname' field */
76 //#define DHCP_BOOT_FILE 0x43 /* same as 'file' field */
77 //#define DHCP_USER_CLASS 0x4d /* RFC 3004. set of LASCII strings. "I am a printer" etc */
78 #define DHCP_FQDN 0x51 /* client asks to update DNS to map its FQDN to its new IP */
79 //#define DHCP_DOMAIN_SEARCH 0x77 /* RFC 3397. set of ASCIZ string, DNS-style compressed */
80 //#define DHCP_STATIC_ROUTES 0x79 /* RFC 3442. (mask,ip,router) tuples */
81 //#define DHCP_WPAD 0xfc /* MSIE's Web Proxy Autodiscovery Protocol */
85 /* Offsets in option byte sequence */
89 /* Bits in "overload" option */
90 #define OPTION_FIELD 0
98 #define ETH_10MB_LEN 6
100 #define DHCPDISCOVER 1 /* client -> server */
101 #define DHCPOFFER 2 /* client <- server */
102 #define DHCPREQUEST 3 /* client -> server */
103 #define DHCPDECLINE 4 /* client -> server */
104 #define DHCPACK 5 /* client <- server */
105 #define DHCPNAK 6 /* client <- server */
106 #define DHCPRELEASE 7 /* client -> server */
107 #define DHCPINFORM 8 /* client -> server */
114 extern const struct dhcp_option dhcp_options[];
115 extern const char dhcp_option_strings[];
116 extern const uint8_t dhcp_option_lengths[];
118 uint8_t *get_option(struct dhcp_packet *packet, int code) FAST_FUNC;
119 int end_option(uint8_t *optionptr) FAST_FUNC;
120 void add_option_string(uint8_t *optionptr, uint8_t *string) FAST_FUNC;
121 void add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) FAST_FUNC;
122 #if ENABLE_FEATURE_UDHCP_RFC3397
123 char *dname_dec(const uint8_t *cstr, int clen, const char *pre) FAST_FUNC;
124 uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen) FAST_FUNC;
127 POP_SAVED_FUNCTION_VISIBILITY