Contents of /trunk/mkinitrd-magellan/busybox/networking/udhcp/dhcpd.h
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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File size: 5249 byte(s)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 5249 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* dhcpd.h */ |
3 | #ifndef UDHCP_DHCPD_H |
4 | #define UDHCP_DHCPD_H 1 |
5 | |
6 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
7 | |
8 | /* Defaults you may want to tweak */ |
9 | /* Default max_lease_sec */ |
10 | #define LEASE_TIME (60*60*24 * 10) |
11 | #define LEASES_FILE CONFIG_DHCPD_LEASES_FILE |
12 | /* Where to find the DHCP server configuration file */ |
13 | #define DHCPD_CONF_FILE "/etc/udhcpd.conf" |
14 | |
15 | |
16 | struct option_set { |
17 | uint8_t *data; |
18 | struct option_set *next; |
19 | }; |
20 | |
21 | struct static_lease { |
22 | struct static_lease *next; |
23 | uint32_t nip; |
24 | uint8_t mac[6]; |
25 | }; |
26 | |
27 | struct server_config_t { |
28 | char *interface; /* interface to use */ |
29 | //TODO: ifindex, server_nip, server_mac |
30 | // are obtained from interface name. |
31 | // Instead of querying them *once*, create update_server_network_data_cache() |
32 | // and call it before any usage of these fields. |
33 | // update_server_network_data_cache() must re-query data |
34 | // if more than N seconds have passed after last use. |
35 | int ifindex; |
36 | uint32_t server_nip; |
37 | #if ENABLE_FEATURE_UDHCP_PORT |
38 | uint16_t port; |
39 | #endif |
40 | uint8_t server_mac[6]; /* our MAC address (used only for ARP probing) */ |
41 | struct option_set *options; /* list of DHCP options loaded from the config file */ |
42 | int verbose; |
43 | /* start,end are in host order: we need to compare start <= ip <= end */ |
44 | uint32_t start_ip; /* start address of leases, in host order */ |
45 | uint32_t end_ip; /* end of leases, in host order */ |
46 | uint32_t max_lease_sec; /* maximum lease time (host order) */ |
47 | uint32_t min_lease_sec; /* minimum lease time a client can request */ |
48 | uint32_t max_leases; /* maximum number of leases (including reserved addresses) */ |
49 | uint32_t auto_time; /* how long should udhcpd wait before writing a config file. |
50 | * if this is zero, it will only write one on SIGUSR1 */ |
51 | uint32_t decline_time; /* how long an address is reserved if a client returns a |
52 | * decline message */ |
53 | uint32_t conflict_time; /* how long an arp conflict offender is leased for */ |
54 | uint32_t offer_time; /* how long an offered address is reserved */ |
55 | uint32_t siaddr_nip; /* "next server" bootp option */ |
56 | char *lease_file; |
57 | char *pidfile; |
58 | char *notify_file; /* what to run whenever leases are written */ |
59 | char *sname; /* bootp server name */ |
60 | char *boot_file; /* bootp boot file option */ |
61 | struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */ |
62 | }; |
63 | |
64 | #define server_config (*(struct server_config_t*)&bb_common_bufsiz1) |
65 | /* client_config sits in 2nd half of bb_common_bufsiz1 */ |
66 | |
67 | #if ENABLE_FEATURE_UDHCP_PORT |
68 | #define SERVER_PORT (server_config.port) |
69 | #else |
70 | #define SERVER_PORT 67 |
71 | #endif |
72 | |
73 | |
74 | /*** leases.h ***/ |
75 | |
76 | typedef uint32_t leasetime_t; |
77 | typedef int32_t signed_leasetime_t; |
78 | |
79 | struct dyn_lease { |
80 | /* "nip": IP in network order */ |
81 | /* Unix time when lease expires. Kept in memory in host order. |
82 | * When written to file, converted to network order |
83 | * and adjusted (current time subtracted) */ |
84 | leasetime_t expires; |
85 | uint32_t lease_nip; |
86 | /* We use lease_mac[6], since e.g. ARP probing uses |
87 | * only 6 first bytes anyway. We check received dhcp packets |
88 | * that their hlen == 6 and thus chaddr has only 6 significant bytes |
89 | * (dhcp packet has chaddr[16], not [6]) |
90 | */ |
91 | uint8_t lease_mac[6]; |
92 | char hostname[20]; |
93 | uint8_t pad[2]; |
94 | /* total size is a multiply of 4 */ |
95 | } PACKED; |
96 | |
97 | extern struct dyn_lease *g_leases; |
98 | |
99 | struct dyn_lease *add_lease( |
100 | const uint8_t *chaddr, uint32_t yiaddr, |
101 | leasetime_t leasetime, |
102 | const char *hostname, int hostname_len |
103 | ) FAST_FUNC; |
104 | int is_expired_lease(struct dyn_lease *lease) FAST_FUNC; |
105 | struct dyn_lease *find_lease_by_mac(const uint8_t *mac) FAST_FUNC; |
106 | struct dyn_lease *find_lease_by_nip(uint32_t nip) FAST_FUNC; |
107 | uint32_t find_free_or_expired_nip(const uint8_t *safe_mac) FAST_FUNC; |
108 | |
109 | |
110 | /*** static_leases.h ***/ |
111 | |
112 | /* Config file parser will pass static lease info to this function |
113 | * which will add it to a data structure that can be searched later */ |
114 | void add_static_lease(struct static_lease **st_lease_pp, uint8_t *mac, uint32_t nip) FAST_FUNC; |
115 | /* Find static lease IP by mac */ |
116 | uint32_t get_static_nip_by_mac(struct static_lease *st_lease, void *arg) FAST_FUNC; |
117 | /* Check to see if an IP is reserved as a static IP */ |
118 | int is_nip_reserved(struct static_lease *st_lease, uint32_t nip) FAST_FUNC; |
119 | /* Print out static leases just to check what's going on (debug code) */ |
120 | #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2 |
121 | void log_static_leases(struct static_lease **st_lease_pp) FAST_FUNC; |
122 | #else |
123 | # define log_static_leases(st_lease_pp) ((void)0) |
124 | #endif |
125 | |
126 | |
127 | /*** serverpacket.h ***/ |
128 | |
129 | int send_offer(struct dhcp_packet *oldpacket) FAST_FUNC; |
130 | int send_NAK(struct dhcp_packet *oldpacket) FAST_FUNC; |
131 | int send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr) FAST_FUNC; |
132 | int send_inform(struct dhcp_packet *oldpacket) FAST_FUNC; |
133 | |
134 | |
135 | /*** files.h ***/ |
136 | |
137 | void read_config(const char *file) FAST_FUNC; |
138 | void write_leases(void) FAST_FUNC; |
139 | void read_leases(const char *file) FAST_FUNC; |
140 | struct option_set *find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC; |
141 | |
142 | |
143 | POP_SAVED_FUNCTION_VISIBILITY |
144 | |
145 | #endif |