1 | /* vi: set sw=4 ts=4: */
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2 | /* options.h */
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3 | #ifndef _OPTIONS_H
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4 | #define _OPTIONS_H
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5 |
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6 | #define TYPE_MASK 0x0F
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7 |
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8 | enum {
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9 | OPTION_IP=1,
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10 | OPTION_IP_PAIR,
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11 | OPTION_STRING,
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12 | #if ENABLE_FEATURE_RFC3397
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13 | OPTION_STR1035, /* RFC1035 compressed domain name list */
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14 | #endif
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15 | OPTION_BOOLEAN,
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16 | OPTION_U8,
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17 | OPTION_U16,
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18 | OPTION_S16,
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19 | OPTION_U32,
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20 | OPTION_S32
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21 | };
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22 |
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23 | #define OPTION_REQ 0x10 /* have the client request this option */
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24 | #define OPTION_LIST 0x20 /* There can be a list of 1 or more of these */
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25 |
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26 | /*****************************************************************/
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27 | /* Do not modify below here unless you know what you are doing!! */
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28 | /*****************************************************************/
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29 |
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30 | /* DHCP protocol -- see RFC 2131 */
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31 | #define SERVER_PORT 67
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32 | #define CLIENT_PORT 68
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33 |
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34 | #define DHCP_MAGIC 0x63825363
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35 |
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36 | /* DHCP option codes (partial list) */
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37 | #define DHCP_PADDING 0x00
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38 | #define DHCP_SUBNET 0x01
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39 | #define DHCP_TIME_OFFSET 0x02
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40 | #define DHCP_ROUTER 0x03
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41 | #define DHCP_TIME_SERVER 0x04
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42 | #define DHCP_NAME_SERVER 0x05
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43 | #define DHCP_DNS_SERVER 0x06
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44 | #define DHCP_LOG_SERVER 0x07
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45 | #define DHCP_COOKIE_SERVER 0x08
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46 | #define DHCP_LPR_SERVER 0x09
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47 | #define DHCP_HOST_NAME 0x0c
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48 | #define DHCP_BOOT_SIZE 0x0d
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49 | #define DHCP_DOMAIN_NAME 0x0f
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50 | #define DHCP_SWAP_SERVER 0x10
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51 | #define DHCP_ROOT_PATH 0x11
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52 | #define DHCP_IP_TTL 0x17
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53 | #define DHCP_MTU 0x1a
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54 | #define DHCP_BROADCAST 0x1c
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55 | #define DHCP_NTP_SERVER 0x2a
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56 | #define DHCP_WINS_SERVER 0x2c
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57 | #define DHCP_REQUESTED_IP 0x32
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58 | #define DHCP_LEASE_TIME 0x33
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59 | #define DHCP_OPTION_OVER 0x34
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60 | #define DHCP_MESSAGE_TYPE 0x35
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61 | #define DHCP_SERVER_ID 0x36
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62 | #define DHCP_PARAM_REQ 0x37
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63 | #define DHCP_MESSAGE 0x38
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64 | #define DHCP_MAX_SIZE 0x39
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65 | #define DHCP_T1 0x3a
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66 | #define DHCP_T2 0x3b
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67 | #define DHCP_VENDOR 0x3c
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68 | #define DHCP_CLIENT_ID 0x3d
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69 | #define DHCP_FQDN 0x51
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70 |
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71 | #define DHCP_END 0xFF
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72 |
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73 |
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74 | #define BOOTREQUEST 1
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75 | #define BOOTREPLY 2
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76 |
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77 | #define ETH_10MB 1
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78 | #define ETH_10MB_LEN 6
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79 |
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80 | #define DHCPDISCOVER 1
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81 | #define DHCPOFFER 2
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82 | #define DHCPREQUEST 3
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83 | #define DHCPDECLINE 4
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84 | #define DHCPACK 5
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85 | #define DHCPNAK 6
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86 | #define DHCPRELEASE 7
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87 | #define DHCPINFORM 8
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88 |
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89 | #define BROADCAST_FLAG 0x8000
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90 |
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91 | #define OPTION_FIELD 0
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92 | #define FILE_FIELD 1
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93 | #define SNAME_FIELD 2
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94 |
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95 | /* miscellaneous defines */
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96 | #define OPT_CODE 0
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97 | #define OPT_LEN 1
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98 | #define OPT_DATA 2
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99 |
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100 | struct dhcp_option {
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101 | char name[12];
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102 | char flags;
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103 | uint8_t code;
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104 | };
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105 |
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106 | extern const struct dhcp_option dhcp_options[];
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107 | extern const unsigned char option_lengths[];
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108 |
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109 | uint8_t *get_option(struct dhcpMessage *packet, int code);
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110 | int end_option(uint8_t *optionptr);
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111 | int add_option_string(uint8_t *optionptr, uint8_t *string);
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112 | int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data);
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113 | #if ENABLE_FEATURE_RFC3397
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114 | char *dname_dec(const uint8_t *cstr, int clen, const char *pre);
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115 | uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen);
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116 | #endif
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117 |
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118 | #endif
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