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mirror of https://github.com/samba-team/samba.git synced 2025-01-29 21:47:30 +03:00
Andrew Tridgell cfbad9b082 - changed some debug levels in clientutil.c
- added dir_check_ftype() to clean up the file type checking a bit

- added check for libc version >= 5 for setfsuid() for Linux

- moved the AM_MASTER() and related macros to nameserv.h

- added proper defines for the various netbios announce types

- don't call the announce_backup() code, as I'm pretty sure its wrong
it sent ANN_GetBackupListReq packets as broadcasts, they are supposed
to be used only by clients to the master browser to find a list of
available backup servers to remote a netserverenum to, I don't think
nmbd should ever send one.

- fixed a bug in the browse list writing

- minor debug cleanups

- put in the code to discard our own broadcasts (it won't work for
multi-homed hosts though)

- changed ELECTION_VERSION to 1 so we can be beaten by a NT 3.51 server by
lowering the os level.

- only do sync_browse_lists() if we are the master browser, otherwise
we'll cause network overload

- don't call tell_become_backup() as it appears to be badly broken, it
should only be used when the machine being told has its MAINTAIN_LIST
to to auto. Not calling it does no great harm anyway

- fix a nasty bug where becomebackup was confused with reset browser!

- make setbuffer() not get caught by the auto protototypes
-

274 lines
6.1 KiB
C

/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios header - version 2
Copyright (C) Andrew Tridgell 1994-1995
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.
*/
/* NTAS uses 2, NT uses 1, WfWg uses 0 */
#define MAINTAIN_LIST 2
#define ELECTION_VERSION 1
#define MAX_DGRAM_SIZE (80*18+64)
#define MIN_DGRAM_SIZE 12
#define NMB_QUERY 0x20
#define NMB_STATUS 0x21
#define NMB_REG 0x05
#define NMB_REL 0x06
#define NB_GROUP 0x80
#define NB_PERM 0x02
#define NB_ACTIVE 0x04
#define NB_CONFL 0x08
#define NB_DEREG 0x10
#define NB_BFLAG 0x00
#define NB_PFLAG 0x20
#define NB_MFLAG 0x40
#define NB__FLAG 0x60
#define NB_FLGMSK 0x60
#define REFRESH_TIME (15*60)
#define NAME_PERMANENT(p) ((p) & NB_PERM)
#define NAME_ACTIVE(p) ((p) & NB_ACTIVE)
#define NAME_CONFLICT(p) ((p) & NB_CONFL)
#define NAME_DEREG(p) ((p) & NB_DEREG)
#define NAME_GROUP(p) ((p) & NB_GROUP)
#define NAME_BFLAG(p) (((p) & NB_FLGMSK) == NB_BFLAG)
#define NAME_PFLAG(p) (((p) & NB_FLGMSK) == NB_PFLAG)
#define NAME_MFLAG(p) (((p) & NB_FLGMSK) == NB_MFLAG)
#define NAME__FLAG(p) (((p) & NB_FLGMSK) == NB__FLAG)
enum name_source {STATUS_QUERY, LMHOSTS, REGISTER, SELF, DNS, DNSFAIL};
enum node_type {B_NODE=0, P_NODE=1, M_NODE=2, NBDD_NODE=3};
enum packet_type {NMB_PACKET, DGRAM_PACKET};
enum cmd_type
{
NAME_STATUS_MASTER_CHECK,
NAME_STATUS_CHECK,
MASTER_SERVER_CHECK,
SERVER_CHECK,
FIND_MASTER,
CHECK_MASTER,
NAME_REGISTER,
NAME_RELEASE,
NAME_CONFIRM_QUERY
};
/* a netbios name structure */
struct nmb_name {
char name[17];
char scope[64];
int name_type;
};
/* this is the structure used for the local netbios name list */
struct name_record
{
struct name_record *next;
struct name_record *prev;
struct nmb_name name;
time_t death_time;
struct in_addr ip;
int nb_flags;
enum name_source source;
};
/* browse and backup server cache for synchronising browse list */
struct browse_cache_record
{
struct browse_cache_record *next;
struct browse_cache_record *prev;
pstring name;
int type;
pstring group;
struct in_addr ip;
time_t sync_time;
BOOL synced;
};
/* 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 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 server_record *serverlist;
/* work group info */
fstring work_group;
int token; /* used when communicating with backup browsers */
int ServerType;
/* announce info */
time_t lastannounce_time;
int announce_interval;
BOOL needannounce;
/* election info */
BOOL RunningElection;
BOOL needelection;
int ElectionCount;
uint32 ElectionCriterion;
};
/* a domain structure. it contains a list of workgroups */
struct domain_record
{
struct domain_record *next;
struct domain_record *prev;
struct work_record *workgrouplist;
struct in_addr bcast_ip;
struct in_addr mask_ip;
struct in_addr myip;
};
/* 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 a 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;
};
/* initiated name queries recorded in this list to track any responses... */
struct name_response_record
{
struct name_response_record *next;
struct name_response_record *prev;
uint16 response_id;
enum cmd_type cmd_type;
int fd;
struct nmb_name name;
BOOL bcast;
BOOL recurse;
struct in_addr to_ip;
time_t start_time;
int num_msgs;
};
/* 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;
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;
};
#define AM_MASTER(work) (work->ServerType & SV_TYPE_MASTER_BROWSER)
#define AM_BACKUP(work) (work->ServerType & SV_TYPE_BACKUP_BROWSER)
#define AM_DOMCTL(work) (work->ServerType & SV_TYPE_DOMAIN_CTRL)
#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