nsswitch/winbindd.h

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/* 
   Unix SMB/CIFS implementation.

   Winbind daemon for ntdom nss module

   Copyright (C) Tim Potter 2000
   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library 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
   Library General Public License for more details.
   
   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the
   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA  02111-1307, USA.   
*/

#ifndef _WINBINDD_H
#define _WINBINDD_H

#include "nterr.h"

#include "winbindd_nss.h"

#ifdef HAVE_LIBNSCD
#include "libnscd.h"
#endif

#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

#define WB_REPLACE_CHAR         '_'

/* bits for fd_event.flags */
#define EVENT_FD_READ 1
#define EVENT_FD_WRITE 2

struct fd_event {
        struct fd_event *next, *prev;
        int fd;
        int flags; /* see EVENT_FD_* flags */
        void (*handler)(struct fd_event *fde, int flags);
        void *data;
        size_t length, done;
        void (*finished)(void *private_data, BOOL success);
        void *private_data;
};

struct sid_ctr {
        DOM_SID *sid;
        BOOL finished;
        const char *domain;
        const char *name;
        enum lsa_SidType type;
};

struct winbindd_cli_state {
        struct winbindd_cli_state *prev, *next;   /* Linked list pointers */
        int sock;                                 /* Open socket from client */
        struct fd_event fd_event;
        pid_t pid;                                /* pid of client */
        BOOL finished;                            /* Can delete from list */
        BOOL write_extra_data;                    /* Write extra_data field */
        time_t last_access;                       /* Time of last access (read or write) */
        BOOL privileged;                           /* Is the client 'privileged' */

        TALLOC_CTX *mem_ctx;                      /* memory per request */
        struct winbindd_request request;          /* Request from client */
        struct winbindd_response response;        /* Respose to client */
        BOOL getpwent_initialized;                /* Has getpwent_state been
                                                   * initialized? */
        BOOL getgrent_initialized;                /* Has getgrent_state been
                                                   * initialized? */
        struct getent_state *getpwent_state;      /* State for getpwent() */
        struct getent_state *getgrent_state;      /* State for getgrent() */
};

/* State between get{pw,gr}ent() calls */

struct getent_state {
        struct getent_state *prev, *next;
        void *sam_entries;
        uint32 sam_entry_index, num_sam_entries;
        BOOL got_sam_entries;
        fstring domain_name;
};

/* Storage for cached getpwent() user entries */

struct getpwent_user {
        fstring name;                        /* Account name */
        fstring gecos;                       /* User information */
        fstring homedir;                     /* User Home Directory */
        fstring shell;                       /* User Login Shell */
        DOM_SID user_sid;                    /* NT user and primary group SIDs */
        DOM_SID group_sid;
};

/* Server state structure */

typedef struct {
        char *acct_name;
        char *full_name;
        char *homedir;
        char *shell;
        gid_t primary_gid;                   /* allow the nss_info
                                                backend to set the primary group */
        DOM_SID user_sid;                    /* NT user and primary group SIDs */
        DOM_SID group_sid;
} WINBIND_USERINFO;

/* Our connection to the DC */

struct winbindd_cm_conn {
        struct cli_state *cli;

        struct rpc_pipe_client *samr_pipe;
        POLICY_HND sam_connect_handle, sam_domain_handle;

        struct rpc_pipe_client *lsa_pipe;
        POLICY_HND lsa_policy;

        struct rpc_pipe_client *netlogon_pipe;
};

struct winbindd_async_request;

/* Async child */

struct winbindd_child {
        struct winbindd_child *next, *prev;

        pid_t pid;
        struct winbindd_domain *domain;
        pstring logfilename;

        struct fd_event event;
        struct timed_event *lockout_policy_event;
        struct winbindd_async_request *requests;
};

/* Structures to hold per domain information */

struct winbindd_domain {
        fstring name;                          /* Domain name */        
        fstring alt_name;                      /* alt Domain name (if any) */
        fstring forest_name;                   /* Name of the AD forest we're in */
        DOM_SID sid;                           /* SID for this domain */
        BOOL initialized;                      /* Did we already ask for the domain mode? */
        BOOL native_mode;                      /* is this a win2k domain in native mode ? */
        BOOL active_directory;                 /* is this a win2k active directory ? */
        BOOL primary;                          /* is this our primary domain ? */
        BOOL internal;                         /* BUILTIN and member SAM */
        BOOL online;                           /* is this domain available ? */
        time_t startup_time;                   /* When we set "startup" true. */
        BOOL startup;                          /* are we in the first 30 seconds after startup_time ? */

        /* Lookup methods for this domain (LDAP or RPC) */
        struct winbindd_methods *methods;

        /* the backend methods are used by the cache layer to find the right
           backend */
        struct winbindd_methods *backend;

        /* Private data for the backends (used for connection cache) */

        void *private_data; 

        /* A working DC */
        fstring dcname;
        struct sockaddr_in dcaddr;

        /* Sequence number stuff */

        time_t last_seq_check;
        uint32 sequence_number;
        NTSTATUS last_status;

        /* The smb connection */

        struct winbindd_cm_conn conn;

        /* The child pid we're talking to */

        struct winbindd_child child;

        /* Callback we use to try put us back online. */

        uint32 check_online_timeout;
        struct timed_event *check_online_event;

        /* Linked list info */

        struct winbindd_domain *prev, *next;
};

/* per-domain methods. This is how LDAP vs RPC is selected
 */
struct winbindd_methods {
        /* does this backend provide a consistent view of the data? (ie. is the primary group
           always correct) */
        BOOL consistent;

        /* get a list of users, returning a WINBIND_USERINFO for each one */
        NTSTATUS (*query_user_list)(struct winbindd_domain *domain,
                                   TALLOC_CTX *mem_ctx,
                                   uint32 *num_entries, 
                                   WINBIND_USERINFO **info);

        /* get a list of domain groups */
        NTSTATUS (*enum_dom_groups)(struct winbindd_domain *domain,
                                    TALLOC_CTX *mem_ctx,
                                    uint32 *num_entries, 
                                    struct acct_info **info);

        /* get a list of domain local groups */
        NTSTATUS (*enum_local_groups)(struct winbindd_domain *domain,
                                    TALLOC_CTX *mem_ctx,
                                    uint32 *num_entries, 
                                    struct acct_info **info);
                                    
        /* convert one user or group name to a sid */
        NTSTATUS (*name_to_sid)(struct winbindd_domain *domain,
                                TALLOC_CTX *mem_ctx,
                                const char *domain_name,
                                const char *name,
                                DOM_SID *sid,
                                enum lsa_SidType *type);

        /* convert a sid to a user or group name */
        NTSTATUS (*sid_to_name)(struct winbindd_domain *domain,
                                TALLOC_CTX *mem_ctx,
                                const DOM_SID *sid,
                                char **domain_name,
                                char **name,
                                enum lsa_SidType *type);

        NTSTATUS (*rids_to_names)(struct winbindd_domain *domain,
                                  TALLOC_CTX *mem_ctx,
                                  const DOM_SID *domain_sid,
                                  uint32 *rids,
                                  size_t num_rids,
                                  char **domain_name,
                                  char ***names,
                                  enum lsa_SidType **types);

        /* lookup user info for a given SID */
        NTSTATUS (*query_user)(struct winbindd_domain *domain, 
                               TALLOC_CTX *mem_ctx, 
                               const DOM_SID *user_sid,
                               WINBIND_USERINFO *user_info);

        /* lookup all groups that a user is a member of. The backend
           can also choose to lookup by username or rid for this
           function */
        NTSTATUS (*lookup_usergroups)(struct winbindd_domain *domain,
                                      TALLOC_CTX *mem_ctx,
                                      const DOM_SID *user_sid,
                                      uint32 *num_groups, DOM_SID **user_gids);

        /* Lookup all aliases that the sids delivered are member of. This is
         * to implement 'domain local groups' correctly */
        NTSTATUS (*lookup_useraliases)(struct winbindd_domain *domain,
                                       TALLOC_CTX *mem_ctx,
                                       uint32 num_sids,
                                       const DOM_SID *sids,
                                       uint32 *num_aliases,
                                       uint32 **alias_rids);

        /* find all members of the group with the specified group_rid */
        NTSTATUS (*lookup_groupmem)(struct winbindd_domain *domain,
                                    TALLOC_CTX *mem_ctx,
                                    const DOM_SID *group_sid,
                                    uint32 *num_names, 
                                    DOM_SID **sid_mem, char ***names, 
                                    uint32 **name_types);

        /* return the current global sequence number */
        NTSTATUS (*sequence_number)(struct winbindd_domain *domain, uint32 *seq);

        /* return the lockout policy */
        NTSTATUS (*lockout_policy)(struct winbindd_domain *domain, 
                                   TALLOC_CTX *mem_ctx,
                                   SAM_UNK_INFO_12 *lockout_policy);
 
        /* return the lockout policy */
        NTSTATUS (*password_policy)(struct winbindd_domain *domain, 
                                    TALLOC_CTX *mem_ctx,
                                    SAM_UNK_INFO_1 *password_policy);
 
        /* enumerate trusted domains */
        NTSTATUS (*trusted_domains)(struct winbindd_domain *domain,
                                    TALLOC_CTX *mem_ctx,
                                    uint32 *num_domains,
                                    char ***names,
                                    char ***alt_names,
                                    DOM_SID **dom_sids);
};

/* Used to glue a policy handle and cli_state together */

typedef struct {
        struct cli_state *cli;
        POLICY_HND pol;
} CLI_POLICY_HND;

/* Filled out by IDMAP backends */
struct winbindd_idmap_methods {
  /* Called when backend is first loaded */
  BOOL (*init)(void);

  BOOL (*get_sid_from_uid)(uid_t uid, DOM_SID *sid);
  BOOL (*get_sid_from_gid)(gid_t gid, DOM_SID *sid);

  BOOL (*get_uid_from_sid)(DOM_SID *sid, uid_t *uid);
  BOOL (*get_gid_from_sid)(DOM_SID *sid, gid_t *gid);

  /* Called when backend is unloaded */
  BOOL (*close)(void);
  /* Called to dump backend status */
  void (*status)(void);
};

#include "nsswitch/winbindd_proto.h"

#define WINBINDD_ESTABLISH_LOOP 30
#define WINBINDD_RESCAN_FREQ 300
#define WINBINDD_PAM_AUTH_KRB5_RENEW_TIME 2592000 /* one month */
#define DOM_SEQUENCE_NONE ((uint32)-1)

#endif /* _WINBINDD_H */

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