nameserv.h

MC Linux/Unix 终端下文件管理器

typedef void (*response_function)(struct subnet_record *, struct response_record *,
                                  struct packet_struct *);

/* typedef to define the function called when this response record times out. */
typedef void (*timeout_response_function)(struct subnet_record *,
                                          struct response_record *);

/* typedef to define the function called when the request that caused this
   response record to be created is successful. */
typedef void (*success_function)(struct subnet_record *, struct userdata_struct *, ...);

/* typedef to define the function called when the request that caused this
   response record to be created is unsuccessful. */
typedef void (*fail_function)(struct subnet_record *, struct response_record *, ...);

/* List of typedefs for success and fail functions of the different query
   types. Used to catch any compile time prototype errors. */

typedef void (*register_name_success_function)( struct subnet_record *,
                                                struct userdata_struct *,
                                                struct nmb_name *,
                                                uint16,
                                                int,
                                                struct in_addr);
typedef void (*register_name_fail_function)( struct subnet_record *,
                                             struct response_record *,
                                             struct nmb_name *);

typedef void (*release_name_success_function)( struct subnet_record *,
                                               struct userdata_struct *, 
                                               struct nmb_name *,
                                               struct in_addr);
typedef void (*release_name_fail_function)( struct subnet_record *,
                                            struct response_record *, 
                                            struct nmb_name *);

typedef void (*refresh_name_success_function)( struct subnet_record *,
                                               struct userdata_struct *, 
                                               struct nmb_name *,
                                               uint16,
                                               int,
                                               struct in_addr);
typedef void (*refresh_name_fail_function)( struct subnet_record *,
                                            struct response_record *,
                                            struct nmb_name *);

typedef void (*query_name_success_function)( struct subnet_record *,
                                             struct userdata_struct *,
                                             struct nmb_name *,
                                             struct in_addr,
                                             struct res_rec *answers);

typedef void (*query_name_fail_function)( struct subnet_record *,
                                          struct response_record *,    
                                          struct nmb_name *,
                                          int);  

typedef void (*node_status_success_function)( struct subnet_record *,
                                              struct userdata_struct *,
                                              struct res_rec *,
                                              struct in_addr);
typedef void (*node_status_fail_function)( struct subnet_record *,
                                           struct response_record *);

/* Initiated name queries are recorded in this list to track any responses. */

struct response_record
{
  struct response_record *next;
  struct response_record *prev;

  uint16 response_id;

  /* Callbacks for packets received or not. */ 
  response_function resp_fn;
  timeout_response_function timeout_fn;

  /* Callbacks for the request succeeding or not. */
  success_function success_fn;
  fail_function fail_fn;
 
  struct packet_struct *packet;

  struct userdata_struct *userdata;

  int num_msgs;

  time_t repeat_time;
  time_t repeat_interval;
  int    repeat_count;

  /* Recursion protection. */
  BOOL in_expiration_processing;
};

/* A subnet structure. It contains a list of workgroups and netbios names. */

/*
   B nodes will have their own, totally separate subnet record, with their
   own netbios name set. These do NOT interact with other subnet records'
   netbios names.
*/

enum subnet_type {
  NORMAL_SUBNET              = 0,  /* Subnet listed in interfaces list. */
  UNICAST_SUBNET             = 1,  /* Subnet for unicast packets. */
  REMOTE_BROADCAST_SUBNET    = 2,  /* Subnet for remote broadcasts. */
  WINS_SERVER_SUBNET         = 3   /* Only created if we are a WINS server. */
};

/* A resource record. */
struct res_rec {
  struct nmb_name rr_name;
  int rr_type;
  int rr_class;
  int ttl;
  int rdlength;
  char rdata[MAX_DGRAM_SIZE];
};

/* An nmb packet. */
struct nmb_packet
{
  struct {
    int name_trn_id;
    int opcode;
    BOOL response;
    struct {
      BOOL bcast;
      BOOL recursion_available;
      BOOL recursion_desired;
      BOOL trunc;
      BOOL authoritative;
    } nm_flags;
    int rcode;
    int qdcount;
    int ancount;
    int nscount;
    int arcount;
  } header;

  struct {
    struct nmb_name question_name;
    int question_type;
    int question_class;
  } question;

  struct res_rec *answers;
  struct res_rec *nsrecs;
  struct res_rec *additional;
};


/* A datagram - this normally contains SMB data in the data[] array. */

struct dgram_packet {
  struct {
    int msg_type;
    struct {
      enum node_type node_type;
      BOOL first;
      BOOL more;
    } flags;
    int dgm_id;
    struct in_addr source_ip;
    int source_port;
    int dgm_length;
    int packet_offset;
  } header;
  struct nmb_name source_name;
  struct nmb_name dest_name;
  int datasize;
  char data[MAX_DGRAM_SIZE];
};

/* Define a structure used to queue packets. This will be a linked
 list of nmb packets. */

struct packet_struct
{
  struct packet_struct *next;
  struct packet_struct *prev;
  BOOL locked;
  struct in_addr ip;
  int port;
  int fd;
  time_t timestamp;
  enum packet_type packet_type;
  union {
    struct nmb_packet nmb;
    struct dgram_packet dgram;
  } packet;
};

/* NETLOGON opcodes */

#define QUERYFORPDC	 7 /* Query for PDC. */
#define QUERYFORPDC_R	12 /* Response to Query for PDC. */
#define SAMLOGON	18
#define SAMLOGON_R	19


/* Ids for netbios packet types. */

#define ANN_HostAnnouncement         1
#define ANN_AnnouncementRequest      2
#define ANN_Election                 8
#define ANN_GetBackupListReq         9
#define ANN_GetBackupListResp       10
#define ANN_BecomeBackup            11
#define ANN_DomainAnnouncement      12
#define ANN_MasterAnnouncement      13
#define ANN_ResetBrowserState       14
#define ANN_LocalMasterAnnouncement 15


/* Broadcast packet announcement intervals, in minutes. */

/* Attempt to add domain logon and domain master names. */
#define CHECK_TIME_ADD_DOM_NAMES 5 

/* Search for master browsers of workgroups samba knows about, 
   except default. */
#define CHECK_TIME_MST_BROWSE       5 

/* Request backup browser announcements from other servers. */
#define CHECK_TIME_ANNOUNCE_BACKUP 15

/* Request host announcements from other servers: min and max of interval. */
#define CHECK_TIME_MIN_HOST_ANNCE   3
#define CHECK_TIME_MAX_HOST_ANNCE  12

/* Announce as master to WINS server and any Primary Domain Controllers. */
#define CHECK_TIME_MST_ANNOUNCE    15

/* Time between syncs from domain master browser to local master browsers. */
#define CHECK_TIME_DMB_TO_LMB_SYNC    15

/* Do all remote announcements this often. */
#define REMOTE_ANNOUNCE_INTERVAL 180

/* what is the maximum period between name refreshes. Note that this only
   affects non-permanent self names (in seconds) */
#define MAX_REFRESH_TIME (60*20)

/* Macro's to enumerate subnets either with or without
   the UNICAST subnet. */

extern struct subnet_record *subnetlist;
extern struct subnet_record *unicast_subnet;
extern struct subnet_record *wins_server_subnet;
extern struct subnet_record *remote_broadcast_subnet;

#define FIRST_SUBNET subnetlist
#define NEXT_SUBNET_EXCLUDING_UNICAST(x) ((x)->next)
#define NEXT_SUBNET_INCLUDING_UNICAST(x) (get_next_subnet_maybe_unicast((x)))

/* To be removed. */
enum state_type { TEST };
#endif /* _NAMESERV_H_ */