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samba-mirror/source3/include/nameserv.h
Stefan Metzmacher 30a1bc3650 s3:nmbd: also listen explicit on the subnet broadcast addresses 
And send replies always via the unicast address of the subnet.

This behavior is off by default (as before)
and can be enabled with "nmbd:bind explicit broadcast = yes".

metze
2010-02-08 18:35:10 +01:00

621 lines
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#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 3 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, see <http://www.gnu.org/licenses/>.
*/
#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. */
uint64_t 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 {
struct name_record *prev, *next;
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 {
struct browse_cache_record *prev, *next;
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. */
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. */
};
struct subnet_record {
struct subnet_record *next;
struct subnet_record *prev;
char *subnet_name; /* For Debug identification. */
enum subnet_type type; /* To catagorize the subnet. */
struct work_record *workgrouplist; /* List of workgroups. */
struct name_record *namelist; /* List of netbios names. */
struct response_record *responselist; /* List of responses expected. */
bool namelist_changed;
bool work_changed;
struct in_addr bcast_ip;
struct in_addr mask_ip;
struct in_addr myip;
int nmb_sock; /* socket to listen for unicast 137. */
int nmb_bcast; /* socket to listen for broadcast 137. */
int dgram_sock; /* socket to listen for unicast 138. */
int dgram_bcast; /* socket to listen for broadcast 138. */
};
/* 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];
};
/* Define these so we can pass info back to caller of name_query */
#define NM_FLAGS_RS 0x80 /* Response. Cheat */
#define NM_FLAGS_AA 0x40 /* Authoritative */
#define NM_FLAGS_TC 0x20 /* Truncated */
#define NM_FLAGS_RD 0x10 /* Recursion Desired */
#define NM_FLAGS_RA 0x08 /* Recursion Available */
#define NM_FLAGS_B 0x01 /* Broadcast */
/* 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;
};
/* msg_type field options - from rfc1002. */
#define DGRAM_UNIQUE 0x10
#define DGRAM_GROUP 0x11
#define DGRAM_BROADCAST 0x12
/* defined in IDL
#define DGRAM_ERROR 0x13
*/
#define DGRAM_QUERY_REQUEST 0x14
#define DGRAM_POSITIVE_QUERY_RESPONSE 0x15
#define DGRAM_NEGATIVE_QUERT_RESPONSE 0x16
/* 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 recv_fd;
int send_fd;
time_t timestamp;
enum packet_type packet_type;
union {
struct nmb_packet nmb;
struct dgram_packet dgram;
} packet;
};
/* 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)
/* The Extinction interval: 4 days, time a node will stay in released state */
#define EXTINCTION_INTERVAL (4*24*60*60)
/* The Extinction time-out: 1 day, time a node will stay in deleted state */
#define EXTINCTION_TIMEOUT (24*60*60)
/* 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)))
/* wins replication record used between nmbd and wrepld */
typedef struct _WINS_RECORD {
char name[17];
char type;
int nb_flags;
int wins_flags;
uint64_t id;
int num_ips;
struct in_addr ip[25];
struct in_addr wins_ip;
} WINS_RECORD;
/* To be removed. */
enum state_type { TEST };
#endif /* _NAMESERV_H_ */
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