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    revision 983 by niro, Fri Apr 24 18:33:46 2009 UTC revision 984 by niro, Sun May 30 11:32:42 2010 UTC
    # Line 1  Line 1 
    1  /* vi: set sw=4 ts=4: */  /* vi: set sw=4 ts=4: */
    2  /* dhcpd.h */  /* dhcpd.h */
    3    #ifndef UDHCP_DHCPD_H
    4    #define UDHCP_DHCPD_H 1
    5    
    6  #ifndef _DHCPD_H  PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
     #define _DHCPD_H  
    7    
    8  #if __GNUC_PREREQ(4,1)  /* Defaults you may want to tweak */
    9  # pragma GCC visibility push(hidden)  /* Default max_lease_sec */
    10  #endif  #define LEASE_TIME      (60*60*24 * 10)
    11    #define LEASES_FILE     CONFIG_DHCPD_LEASES_FILE
    12  /************************************/  /* Where to find the DHCP server configuration file */
     /* Defaults _you_ may want to tweak */  
     /************************************/  
       
     /* the period of time the client is allowed to use that address */  
     #define LEASE_TIME              (60*60*24*10) /* 10 days of seconds */  
     #define LEASES_FILE CONFIG_DHCPD_LEASES_FILE  
       
     /* where to find the DHCP server configuration file */  
    13  #define DHCPD_CONF_FILE         "/etc/udhcpd.conf"  #define DHCPD_CONF_FILE         "/etc/udhcpd.conf"
    14    
    15    
    16  struct option_set {  struct option_set {
    17   uint8_t *data;   uint8_t *data;
    18   struct option_set *next;   struct option_set *next;
    # Line 26  struct option_set { Line 20  struct option_set {
    20    
    21  struct static_lease {  struct static_lease {
    22   struct static_lease *next;   struct static_lease *next;
    23   uint8_t *mac;   uint32_t nip;
    24   uint32_t *ip;   uint8_t mac[6];
    25  };  };
    26    
    27  struct server_config_t {  struct server_config_t {
    28   uint32_t server;                /* Our IP, in network order */   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  #if ENABLE_FEATURE_UDHCP_PORT
    38   uint16_t port;   uint16_t port;
    39  #endif  #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 */   /* 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 */   uint32_t start_ip;              /* start address of leases, in host order */
    45   uint32_t end_ip;                /* End of leases, in host order */   uint32_t end_ip;                /* end of leases, in host order */
    46   struct option_set *options;     /* List of DHCP options loaded from the config file */   uint32_t max_lease_sec;         /* maximum lease time (host order) */
    47   char *interface;                /* The name of the interface to use */   uint32_t min_lease_sec;         /* minimum lease time a client can request */
    48   int ifindex;                    /* Index number of the interface to use */   uint32_t max_leases;            /* maximum number of leases (including reserved addresses) */
      uint8_t arp[6];                 /* Our arp address */  
      char remaining;                 /* should the lease file be interpreted as lease time remaining, or  
                                      * as the time the lease expires */  
      uint32_t lease;                /* lease time in seconds (host order) */  
      uint32_t max_leases;            /* maximum number of leases (including reserved address) */  
    49   uint32_t auto_time;             /* how long should udhcpd wait before writing a config file.   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 */                                   * 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   uint32_t decline_time;          /* how long an address is reserved if a client returns a
    52                                   * decline message */                                   * decline message */
    53   uint32_t conflict_time;         /* how long an arp conflict offender is leased for */   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 */   uint32_t offer_time;            /* how long an offered address is reserved */
    55   uint32_t min_lease;             /* minimum lease a client can request */   uint32_t siaddr_nip;            /* "next server" bootp option */
    56   char *lease_file;   char *lease_file;
    57   char *pidfile;   char *pidfile;
    58   char *notify_file;              /* What to run whenever leases are written */   char *notify_file;              /* what to run whenever leases are written */
      uint32_t siaddr;                /* next server bootp option */  
    59   char *sname;                    /* bootp server name */   char *sname;                    /* bootp server name */
    60   char *boot_file;                /* bootp boot file option */   char *boot_file;                /* bootp boot file option */
    61   struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */   struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
    # Line 71  struct server_config_t { Line 70  struct server_config_t {
    70  #define SERVER_PORT 67  #define SERVER_PORT 67
    71  #endif  #endif
    72    
     extern struct dhcpOfferedAddr *leases;  
       
    73    
    74  /*** leases.h ***/  /*** leases.h ***/
    75    
    76  struct dhcpOfferedAddr {  typedef uint32_t leasetime_t;
    77   uint8_t chaddr[16];  typedef int32_t signed_leasetime_t;
      uint32_t yiaddr; /* network order */  
      uint32_t expires; /* host order */  
     };  
    78    
    79  struct dhcpOfferedAddr *add_lease(const uint8_t *chaddr, uint32_t yiaddr, unsigned long lease) FAST_FUNC;  struct dyn_lease {
    80  int lease_expired(struct dhcpOfferedAddr *lease) FAST_FUNC;   /* "nip": IP in network order */
    81  struct dhcpOfferedAddr *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;   /* Unix time when lease expires. Kept in memory in host order.
    82  struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;   * When written to file, converted to network order
    83  uint32_t find_address(int check_expired) FAST_FUNC;   * 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 ***/  /*** static_leases.h ***/
    111    
    112  /* Config file will pass static lease info to this function which will add it  /* Config file parser will pass static lease info to this function
    113   * to a data structure that can be searched later */   * which will add it to a data structure that can be searched later */
    114  int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip) FAST_FUNC;  void add_static_lease(struct static_lease **st_lease_pp, uint8_t *mac, uint32_t nip) FAST_FUNC;
    115  /* Check to see if a mac has an associated static lease */  /* Find static lease IP by mac */
    116  uint32_t getIpByMac(struct static_lease *lease_struct, void *arg) FAST_FUNC;  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 */  /* Check to see if an IP is reserved as a static IP */
    118  uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip) FAST_FUNC;  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) */  /* Print out static leases just to check what's going on (debug code) */
    120  void printStaticLeases(struct static_lease **lease_struct) FAST_FUNC;  #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 ***/  /*** serverpacket.h ***/
    128    
    129  int send_offer(struct dhcpMessage *oldpacket) FAST_FUNC;  int send_offer(struct dhcp_packet *oldpacket) FAST_FUNC;
    130  int send_NAK(struct dhcpMessage *oldpacket) FAST_FUNC;  int send_NAK(struct dhcp_packet *oldpacket) FAST_FUNC;
    131  int send_ACK(struct dhcpMessage *oldpacket, uint32_t yiaddr) FAST_FUNC;  int send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr) FAST_FUNC;
    132  int send_inform(struct dhcpMessage *oldpacket) FAST_FUNC;  int send_inform(struct dhcp_packet *oldpacket) FAST_FUNC;
    133    
    134    
    135  /*** files.h ***/  /*** files.h ***/
    # Line 118  void read_leases(const char *file) FAST_ Line 140  void read_leases(const char *file) FAST_
    140  struct option_set *find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;  struct option_set *find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;
    141    
    142    
    143  #if __GNUC_PREREQ(4,1)  POP_SAVED_FUNCTION_VISIBILITY
     # pragma GCC visibility pop  
     #endif  
    144    
    145  #endif  #endif
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