0f62c4d065
requestip, vendorclass, clientid are client-side variables,
they do not make sense as udhcpd opts
dhcptype is the packet type (not interesting, it's always 5)
userclass needs parser support in order to work
function old new delta
dhcp_options 68 66 -2
read_opt 865 859 -6
dhcp_option_strings 253 203 -50
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-58) Total: -58 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/* vi: set sw=4 ts=4: */
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/* options.h */
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#ifndef UDHCP_OPTIONS_H
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#define UDHCP_OPTIONS_H 1
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PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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#define TYPE_MASK 0x0F
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enum {
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OPTION_IP = 1,
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OPTION_IP_PAIR,
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OPTION_STRING,
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#if ENABLE_FEATURE_UDHCP_RFC3397
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OPTION_STR1035, /* RFC1035 compressed domain name list */
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#endif
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OPTION_BOOLEAN,
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OPTION_U8,
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OPTION_U16,
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OPTION_S16,
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OPTION_U32,
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OPTION_S32,
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OPTION_STATIC_ROUTES,
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};
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/* Client requests this option by default */
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#define OPTION_REQ 0x10
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/* There can be a list of 1 or more of these */
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#define OPTION_LIST 0x20
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/*****************************************************************/
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/* Do not modify below here unless you know what you are doing!! */
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/*****************************************************************/
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/* DHCP protocol -- see RFC 2131 */
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#define DHCP_MAGIC 0x63825363
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/* DHCP option codes (partial list) */
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#define DHCP_PADDING 0x00
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#define DHCP_SUBNET 0x01
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#define DHCP_TIME_OFFSET 0x02
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#define DHCP_ROUTER 0x03
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#define DHCP_TIME_SERVER 0x04
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//#define DHCP_NAME_SERVER 0x05 /* _really_ ancient kind of NS */
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#define DHCP_DNS_SERVER 0x06
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#define DHCP_LOG_SERVER 0x07
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//#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" server */
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#define DHCP_LPR_SERVER 0x09
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#define DHCP_HOST_NAME 0x0c
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#define DHCP_BOOT_SIZE 0x0d
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#define DHCP_DOMAIN_NAME 0x0f
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#define DHCP_SWAP_SERVER 0x10
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#define DHCP_ROOT_PATH 0x11
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#define DHCP_IP_TTL 0x17
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#define DHCP_MTU 0x1a
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#define DHCP_BROADCAST 0x1c
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#define DHCP_NTP_SERVER 0x2a
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#define DHCP_WINS_SERVER 0x2c
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#define DHCP_REQUESTED_IP 0x32 /* sent by client if specific IP is wanted */
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#define DHCP_LEASE_TIME 0x33
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#define DHCP_OPTION_OVERLOAD 0x34
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#define DHCP_MESSAGE_TYPE 0x35
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#define DHCP_SERVER_ID 0x36 /* by default server's IP */
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#define DHCP_PARAM_REQ 0x37
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#define DHCP_MESSAGE 0x38 /* error message when sending NAK etc */
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#define DHCP_MAX_SIZE 0x39
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//#define DHCP_T1 0x3a
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//#define DHCP_T2 0x3b
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#define DHCP_VENDOR 0x3c /* client's vendor */
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#define DHCP_CLIENT_ID 0x3d /* by default client's MAC addr */
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#define DHCP_FQDN 0x51
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#define DHCP_STATIC_ROUTES 0x79
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#define DHCP_END 0xFF
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/* Offsets in option byte sequence */
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#define OPT_CODE 0
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#define OPT_LEN 1
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#define OPT_DATA 2
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/* Bits in "overload" option */
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#define OPTION_FIELD 0
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#define FILE_FIELD 1
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#define SNAME_FIELD 2
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#define BOOTREQUEST 1
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#define BOOTREPLY 2
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#define ETH_10MB 1
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#define ETH_10MB_LEN 6
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#define DHCPDISCOVER 1 /* client -> server */
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#define DHCPOFFER 2 /* client <- server */
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#define DHCPREQUEST 3 /* client -> server */
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#define DHCPDECLINE 4 /* client -> server */
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#define DHCPACK 5 /* client <- server */
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#define DHCPNAK 6 /* client <- server */
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#define DHCPRELEASE 7 /* client -> server */
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#define DHCPINFORM 8 /* client -> server */
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struct dhcp_option {
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uint8_t flags;
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uint8_t code;
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};
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extern const struct dhcp_option dhcp_options[];
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extern const char dhcp_option_strings[];
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extern const uint8_t dhcp_option_lengths[];
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uint8_t *get_option(struct dhcp_packet *packet, int code) FAST_FUNC;
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int end_option(uint8_t *optionptr) FAST_FUNC;
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int add_option_string(uint8_t *optionptr, uint8_t *string) FAST_FUNC;
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int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) FAST_FUNC;
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#if ENABLE_FEATURE_UDHCP_RFC3397
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char *dname_dec(const uint8_t *cstr, int clen, const char *pre) FAST_FUNC;
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uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen) FAST_FUNC;
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#endif
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POP_SAVED_FUNCTION_VISIBILITY
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#endif
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