nameserv.h

samba-3.0.22.tar.gz 编译smb服务器的源码

#ifndef _NAMESERV_H_
#define _NAMESERV_H_
/* 
   Unix SMB/CIFS implementation.
   NBT netbios header - version 2
   Copyright (C) Andrew Tridgell 1994-1998
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   
*/

#define INFO_VERSION	"INFO/version"
#define INFO_COUNT	"INFO/num_entries"
#define INFO_ID_HIGH	"INFO/id_high"
#define INFO_ID_LOW	"INFO/id_low"
#define ENTRY_PREFIX 	"ENTRY/"

#define PERMANENT_TTL 0

/* NTAS uses 2, NT uses 1, WfWg uses 0 */
#define MAINTAIN_LIST    2
#define ELECTION_VERSION 1

#define MAX_DGRAM_SIZE (576) /* tcp/ip datagram limit is 576 bytes */
#define MIN_DGRAM_SIZE 12

/*********************************************************
 Types of reply packet.
**********************************************************/

enum netbios_reply_type_code { NMB_QUERY, NMB_STATUS, NMB_REG, NMB_REG_REFRESH,
                               NMB_REL, NMB_WAIT_ACK, NMB_MULTIHOMED_REG,
                               WINS_REG, WINS_QUERY };

/* From rfc1002, 4.2.1.2 */
/* Question types. */
#define QUESTION_TYPE_NB_QUERY  0x20
#define QUESTION_TYPE_NB_STATUS 0x21

/* Question class */
#define QUESTION_CLASS_IN  0x1

/* Opcode definitions */
#define NMB_NAME_QUERY_OPCODE       0x0
#define NMB_NAME_REG_OPCODE         0x05 /* see rfc1002.txt 4.2.2,3,5,6,7,8 */
#define NMB_NAME_RELEASE_OPCODE     0x06 /* see rfc1002.txt 4.2.9,10,11 */
#define NMB_WACK_OPCODE             0x07 /* see rfc1002.txt 4.2.16 */
/* Ambiguity in rfc1002 about which of these is correct. */
/* WinNT uses 8 by default but can be made to use 9. */
#define NMB_NAME_REFRESH_OPCODE_8   0x08 /* see rfc1002.txt 4.2.4 */
#define NMB_NAME_REFRESH_OPCODE_9   0x09 /* see rfc1002.txt 4.2.4 */
#define NMB_NAME_MULTIHOMED_REG_OPCODE 0x0F /* Invented by Microsoft. */

/* XXXX what about all the other types?? 0x1, 0x2, 0x3, 0x4, 0x8? */

/* Resource record types. rfc1002 4.2.1.3 */
#define RR_TYPE_A                  0x1
#define RR_TYPE_NS                 0x2
#define RR_TYPE_NULL               0xA
#define RR_TYPE_NB                0x20
#define RR_TYPE_NBSTAT            0x21

/* Resource record class. */
#define RR_CLASS_IN                0x1

/* NetBIOS flags */
#define NB_GROUP  0x80
#define NB_PERM   0x02
#define NB_ACTIVE 0x04
#define NB_CONFL  0x08
#define NB_DEREG  0x10
#define NB_BFLAG  0x00 /* Broadcast node type. */
#define NB_PFLAG  0x20 /* Point-to-point node type. */
#define NB_MFLAG  0x40 /* Mixed bcast & p-p node type. */
#define NB_HFLAG  0x60 /* Microsoft 'hybrid' node type. */
#define NB_NODETYPEMASK 0x60
/* Mask applied to outgoing NetBIOS flags. */
#define NB_FLGMSK 0xE0

/* The wins flags. Looks like the nbflags ! */
#define WINS_UNIQUE	0x00 /* Unique record */
#define WINS_NGROUP	0x01 /* Normal Group eg: 1B */
#define WINS_SGROUP	0x02 /* Special Group eg: 1C */
#define WINS_MHOMED	0x03 /* MultiHomed */

#define WINS_ACTIVE	0x00 /* active record */
#define WINS_RELEASED	0x04 /* released record */
#define WINS_TOMBSTONED 0x08 /* tombstoned record */
#define WINS_DELETED	0x0C /* deleted record */

#define WINS_STATE_MASK	0x0C

#define WINS_LOCAL	0x00 /* local record */
#define WINS_REMOTE	0x10 /* remote record */

#define WINS_BNODE	0x00 /* Broadcast node */
#define WINS_PNODE	0x20 /* PtP node */
#define WINS_MNODE	0x40 /* Mixed node */
#define WINS_HNODE	0x60 /* Hybrid node */

#define WINS_NONSTATIC	0x00 /* dynamic record */
#define WINS_STATIC	0x80 /* static record */

#define WINS_STATE_ACTIVE(p) (((p)->data.wins_flags & WINS_STATE_MASK) == WINS_ACTIVE)


/* NetBIOS flag identifier. */
#define NAME_GROUP(p)  ((p)->data.nb_flags & NB_GROUP)
#define NAME_BFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_BFLAG)
#define NAME_PFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_PFLAG)
#define NAME_MFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_MFLAG)
#define NAME_HFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_HFLAG)

/* Samba name state for a name in a namelist. */
#define NAME_IS_ACTIVE(p)        ((p)->data.nb_flags & NB_ACTIVE)
#define NAME_IN_CONFLICT(p)      ((p)->data.nb_flags & NB_CONFL)
#define NAME_IS_DEREGISTERING(p) ((p)->data.nb_flags & NB_DEREG)

/* Error codes for NetBIOS requests. */
#define FMT_ERR   0x1       /* Packet format error. */
#define SRV_ERR   0x2       /* Internal server error. */
#define NAM_ERR   0x3       /* Name does not exist. */
#define IMP_ERR   0x4       /* Request not implemented. */
#define RFS_ERR   0x5       /* Request refused. */
#define ACT_ERR   0x6       /* Active error - name owned by another host. */
#define CFT_ERR   0x7       /* Name in conflict error. */

#define REFRESH_TIME (15*60)
#define NAME_POLL_REFRESH_TIME (5*60)
#define NAME_POLL_INTERVAL 15

/* Workgroup state identifiers. */
#define AM_POTENTIAL_MASTER_BROWSER(work) ((work)->mst_state == MST_POTENTIAL)
#define AM_LOCAL_MASTER_BROWSER(work) ((work)->mst_state == MST_BROWSER)
#define AM_DOMAIN_MASTER_BROWSER(work) ((work)->dom_state == DOMAIN_MST)
#define AM_DOMAIN_MEMBER(work) ((work)->log_state == LOGON_SRV)

/* Microsoft browser NetBIOS name. */
#define MSBROWSE "\001\002__MSBROWSE__\002"

/* Mail slots. */
#define BROWSE_MAILSLOT    "\\MAILSLOT\\BROWSE"
#define NET_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NETLOGON"
#define NT_LOGON_MAILSLOT  "\\MAILSLOT\\NET\\NTLOGON"
#define LANMAN_MAILSLOT    "\\MAILSLOT\\LANMAN"

/* Samba definitions for find_name_on_subnet(). */
#define FIND_ANY_NAME   0
#define FIND_SELF_NAME  1

/*
 * The different name types that can be in namelists.
 *
 * SELF_NAME should only be on the broadcast and unicast subnets.
 * LMHOSTS_NAME should only be in the remote_broadcast_subnet.
 * REGISTER_NAME, DNS_NAME, DNSFAIL_NAME should only be in the wins_server_subnet.
 * WINS_PROXY_NAME should only be on the broadcast subnets.
 * PERMANENT_NAME can be on all subnets except remote_broadcast_subnet.
 *
 */

enum name_source {LMHOSTS_NAME, REGISTER_NAME, SELF_NAME, DNS_NAME, 
                  DNSFAIL_NAME, PERMANENT_NAME, WINS_PROXY_NAME};
enum node_type {B_NODE=0, P_NODE=1, M_NODE=2, NBDD_NODE=3};
enum packet_type {NMB_PACKET, DGRAM_PACKET};

enum master_state {
	MST_NONE,
	MST_POTENTIAL,
	MST_BACKUP,
	MST_MSB,
	MST_BROWSER,
	MST_UNBECOMING_MASTER
};

enum domain_state {
	DOMAIN_NONE,
	DOMAIN_WAIT,
	DOMAIN_MST
};

enum logon_state {
	LOGON_NONE,
	LOGON_WAIT,
	LOGON_SRV
};

struct subnet_record;

struct nmb_data {
	uint16 nb_flags;         /* Netbios flags. */
	int num_ips;             /* Number of ip entries. */
	struct in_addr *ip;      /* The ip list for this name. */

	enum name_source source; /* Where the name came from. */

	time_t death_time; /* The time the record must be removed (do not remove if 0). */
	time_t refresh_time; /* The time the record should be refreshed. */
  
	SMB_BIG_UINT id;		/* unique id */
	struct in_addr wins_ip;	/* the adress of the wins server this record comes from */

	int wins_flags;		/* similar to the netbios flags but different ! */
};

/* This structure represents an entry in a local netbios name list. */
struct name_record {
	ubi_trNode            node[1];
	struct subnet_record *subnet;
	struct nmb_name       name;    /* The netbios name. */
	struct nmb_data       data;    /* The netbios data. */
};

/* Browser cache for synchronising browse lists. */
struct browse_cache_record {
	ubi_dlNode     node[1];
	unstring        lmb_name;
	unstring        work_group;
	struct in_addr ip;
	time_t         sync_time;
	time_t         death_time; /* The time the record must be removed. */
};

/* This is used to hold the list of servers in my domain, and is
   contained within lists of domains. */

struct server_record {
	struct server_record *next;
	struct server_record *prev;

	struct subnet_record *subnet;

	struct server_info_struct serv;
	time_t death_time;  
};

/* A workgroup structure. It contains a list of servers. */
struct work_record {
	struct work_record *next;
	struct work_record *prev;

	struct subnet_record *subnet;

	struct server_record *serverlist;

	/* Stage of development from non-local-master up to local-master browser. */
	enum master_state mst_state;

	/* Stage of development from non-domain-master to domain-master browser. */
	enum domain_state dom_state;

  	/* Stage of development from non-logon-server to logon server. */
	enum logon_state log_state;

	/* Work group info. */
	unstring work_group;
	int     token;        /* Used when communicating with backup browsers. */
	unstring local_master_browser_name;      /* Current local master browser. */

	/* Announce info. */
	time_t lastannounce_time;
	int announce_interval;
	BOOL    needannounce;

	/* Timeout time for this workgroup. 0 means permanent. */
	time_t death_time;  

	/* Election info */
	BOOL    RunningElection;
	BOOL    needelection;
	int     ElectionCount;
	uint32  ElectionCriterion;

	/* Domain master browser info. Used for efficient syncs. */
	struct nmb_name dmb_name;
	struct in_addr dmb_addr;
};

/* typedefs needed to define copy & free functions for userdata. */
struct userdata_struct;

typedef struct userdata_struct * (*userdata_copy_fn)(struct userdata_struct *);
typedef void (*userdata_free_fn)(struct userdata_struct *);

/* Structure to define any userdata passed around. */

struct userdata_struct {
	userdata_copy_fn copy_fn;
	userdata_free_fn free_fn;
	unsigned int userdata_len;
	char data[16]; /* 16 is to ensure alignment/padding on all systems */
};

struct response_record;
struct packet_struct;
struct res_rec;

/* typedef to define the function called when this response packet comes in. */
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. */