115 lines
3.6 KiB
C
115 lines
3.6 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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};
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#define OPTION_REQ 0x10 /* have the client request this option */
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#define OPTION_LIST 0x20 /* There can be a list of 1 or more of these */
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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
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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
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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
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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
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#define DHCP_PARAM_REQ 0x37
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#define DHCP_MESSAGE 0x38
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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
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#define DHCP_CLIENT_ID 0x3d
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#define DHCP_FQDN 0x51
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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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