s3-winbind: Fix Bug #7568: Make sure cm_connect_lsa_tcp does not reset the secure...
[amitay/samba.git] / source3 / winbindd / winbindd_cm.c
index 3135b6a2a3e31693ee6d785b7991b2c9b2b09f7e..958daf794e8095e71ee952394c062cfdc6312ed6 100644 (file)
 
 #include "includes.h"
 #include "winbindd.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "../librpc/gen_ndr/cli_netlogon.h"
+#include "rpc_client/cli_netlogon.h"
+#include "../librpc/gen_ndr/cli_samr.h"
+#include "../librpc/gen_ndr/cli_lsa.h"
+#include "rpc_client/cli_lsarpc.h"
+#include "../librpc/gen_ndr/cli_dssetup.h"
+#include "libads/sitename_cache.h"
+#include "librpc/gen_ndr/messaging.h"
+#include "libsmb/clidgram.h"
+#include "ads.h"
+#include "secrets.h"
 
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_WINBIND
@@ -172,9 +184,7 @@ static bool fork_child_dc_connect(struct winbindd_domain *domain)
        int num_dcs = 0;
        TALLOC_CTX *mem_ctx = NULL;
        pid_t parent_pid = sys_getpid();
-
-       /* Stop zombies */
-       CatchChild();
+       char *lfile = NULL;
 
        if (domain->dc_probe_pid != (pid_t)-1) {
                /*
@@ -212,26 +222,22 @@ static bool fork_child_dc_connect(struct winbindd_domain *domain)
 
        /* Leave messages blocked - we will never process one. */
 
-       if (!reinit_after_fork(winbind_messaging_context(), true)) {
-               DEBUG(0,("reinit_after_fork() failed\n"));
+       if (!override_logfile) {
+               if (asprintf(&lfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) == -1) {
+                       DEBUG(0, ("fork_child_dc_connect: out of memory.\n"));
+                       _exit(1);
+               }
+       }
+
+       if (!winbindd_reinit_after_fork(lfile)) {
                messaging_send_buf(winbind_messaging_context(),
                                   pid_to_procid(parent_pid),
                                   MSG_WINBIND_FAILED_TO_GO_ONLINE,
                                   (uint8 *)domain->name,
                                   strlen(domain->name)+1);
-               _exit(0);
-       }
-
-       close_conns_after_fork();
-
-       if (!override_logfile) {
-               char *lfile;
-               if (asprintf(&lfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) > 0) {
-                       lp_set_logfile(lfile);
-                       SAFE_FREE(lfile);
-                       reopen_logs();
-               }
+               _exit(1);
        }
+       SAFE_FREE(lfile);
 
        mem_ctx = talloc_init("fork_child_dc_connect");
        if (!mem_ctx) {
@@ -241,7 +247,7 @@ static bool fork_child_dc_connect(struct winbindd_domain *domain)
                                   MSG_WINBIND_FAILED_TO_GO_ONLINE,
                                   (uint8 *)domain->name,
                                   strlen(domain->name)+1);
-               _exit(0);
+               _exit(1);
        }
 
        if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
@@ -271,7 +277,7 @@ static bool fork_child_dc_connect(struct winbindd_domain *domain)
 
 static void check_domain_online_handler(struct event_context *ctx,
                                        struct timed_event *te,
-                                       const struct timeval *now,
+                                       struct timeval now,
                                        void *private_data)
 {
         struct winbindd_domain *domain =
@@ -285,7 +291,7 @@ static void check_domain_online_handler(struct event_context *ctx,
 
        /* Are we still in "startup" mode ? */
 
-       if (domain->startup && (now->tv_sec > domain->startup_time + 30)) {
+       if (domain->startup && (now.tv_sec > domain->startup_time + 30)) {
                /* No longer in "startup" mode. */
                DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
                        domain->name ));
@@ -358,7 +364,7 @@ void set_domain_offline(struct winbindd_domain *domain)
                return;
        }
 
-       /* If we're in statup mode, check again in 10 seconds, not in
+       /* If we're in startup mode, check again in 10 seconds, not in
           lp_winbind_reconnect_delay() seconds (which is 30 seconds by default). */
 
        calc_new_online_timeout_check(domain);
@@ -366,7 +372,6 @@ void set_domain_offline(struct winbindd_domain *domain)
        domain->check_online_event = event_add_timed(winbind_event_context(),
                                                NULL,
                                                timeval_current_ofs(domain->check_online_timeout,0),
-                                               "check_domain_online_handler",
                                                check_domain_online_handler,
                                                domain);
 
@@ -402,8 +407,6 @@ void set_domain_offline(struct winbindd_domain *domain)
 
 static void set_domain_online(struct winbindd_domain *domain)
 {
-       struct timeval now;
-
        DEBUG(10,("set_domain_online: called for domain %s\n",
                domain->name ));
 
@@ -422,9 +425,7 @@ static void set_domain_online(struct winbindd_domain *domain)
        winbindd_set_locator_kdc_envs(domain);
 
        /* If we are waiting to get a krb5 ticket, trigger immediately. */
-       GetTimeOfDay(&now);
-       set_event_dispatch_time(winbind_event_context(),
-                               "krb5_ticket_gain_handler", now);
+       ccache_regain_all_now();
 
        /* Ok, we're out of any startup mode now... */
        domain->startup = False;
@@ -492,11 +493,26 @@ void set_domain_online_request(struct winbindd_domain *domain)
                return;
        }
 
+       if (domain->internal) {
+               DEBUG(10, ("set_domain_online_request: Internal domains are "
+                          "always online\n"));
+               return;
+       }
+
        /* We've been told it's safe to go online and
           try and connect to a DC. But I don't believe it
           because network manager seems to lie.
           Wait at least 5 seconds. Heuristics suck... */
 
+
+       GetTimeOfDay(&tev);
+
+       /* Go into "startup" mode again. */
+       domain->startup_time = tev.tv_sec;
+       domain->startup = True;
+
+       tev.tv_sec += 5;
+
        if (!domain->check_online_event) {
                /* If we've come from being globally offline we
                   don't have a check online event handler set.
@@ -505,29 +521,20 @@ void set_domain_online_request(struct winbindd_domain *domain)
 
                DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
                        domain->name ));
-
-               domain->check_online_event = event_add_timed(winbind_event_context(),
-                                                               NULL,
-                                                               timeval_current_ofs(5, 0),
-                                                               "check_domain_online_handler",
-                                                               check_domain_online_handler,
-                                                               domain);
-
-               /* The above *has* to succeed for winbindd to work. */
-               if (!domain->check_online_event) {
-                       smb_panic("set_domain_online_request: failed to add online handler");
-               }
        }
 
-       GetTimeOfDay(&tev);
-
-       /* Go into "startup" mode again. */
-       domain->startup_time = tev.tv_sec;
-       domain->startup = True;
+       TALLOC_FREE(domain->check_online_event);
 
-       tev.tv_sec += 5;
+       domain->check_online_event = event_add_timed(winbind_event_context(),
+                                                    NULL,
+                                                    tev,
+                                                    check_domain_online_handler,
+                                                    domain);
 
-       set_event_dispatch_time(winbind_event_context(), "check_domain_online_handler", tev);
+       /* The above *has* to succeed for winbindd to work. */
+       if (!domain->check_online_event) {
+               smb_panic("set_domain_online_request: failed to add online handler");
+       }
 }
 
 /****************************************************************
@@ -635,7 +642,7 @@ static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
                                                  DS_RETURN_DNS_NAME,
                                                  &domain_info,
                                                  &werr);
-               if (W_ERROR_IS_OK(werr)) {
+               if (NT_STATUS_IS_OK(result) && W_ERROR_IS_OK(werr)) {
                        tmp = talloc_strdup(
                                mem_ctx, domain_info->dc_unc);
                        if (tmp == NULL) {
@@ -686,7 +693,7 @@ static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
 
        DEBUG(10,("rpccli_netr_GetAnyDCName returned %s\n", dcname));
 
-       if (!resolve_name(dcname, dc_ss, 0x20)) {
+       if (!resolve_name(dcname, dc_ss, 0x20, true)) {
                return False;
        }
 
@@ -776,7 +783,8 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
        struct sockaddr peeraddr;
        socklen_t peeraddr_len;
 
-       struct sockaddr_in *peeraddr_in = (struct sockaddr_in *)&peeraddr;
+       struct sockaddr_in *peeraddr_in =
+               (struct sockaddr_in *)(void *)&peeraddr;
 
        DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
                controller, domain->name ));
@@ -805,11 +813,31 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
 
        peeraddr_len = sizeof(peeraddr);
 
-       if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0) ||
-           (peeraddr_len != sizeof(struct sockaddr_in)) ||
-           (peeraddr_in->sin_family != PF_INET))
-       {
-               DEBUG(0,("cm_prepare_connection: %s\n", strerror(errno)));
+       if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0)) {
+               DEBUG(0,("cm_prepare_connection: getpeername failed with: %s\n",
+                       strerror(errno)));
+               result = NT_STATUS_UNSUCCESSFUL;
+               goto done;
+       }
+
+       if ((peeraddr_len != sizeof(struct sockaddr_in))
+#ifdef HAVE_IPV6
+           && (peeraddr_len != sizeof(struct sockaddr_in6))
+#endif
+           ) {
+               DEBUG(0,("cm_prepare_connection: got unexpected peeraddr len %d\n",
+                       peeraddr_len));
+               result = NT_STATUS_UNSUCCESSFUL;
+               goto done;
+       }
+
+       if ((peeraddr_in->sin_family != PF_INET)
+#ifdef HAVE_IPV6
+           && (peeraddr_in->sin_family != PF_INET6)
+#endif
+           ) {
+               DEBUG(0,("cm_prepare_connection: got unexpected family %d\n",
+                       peeraddr_in->sin_family));
                result = NT_STATUS_UNSUCCESSFUL;
                goto done;
        }
@@ -829,8 +857,6 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
                }
        }
 
-       cli_setup_signing_state(*cli, Undefined);
-
        result = cli_negprot(*cli);
 
        if (!NT_STATUS_IS_OK(result)) {
@@ -866,7 +892,7 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
                                                              machine_krb5_principal, 
                                                              machine_password,
                                                              lp_workgroup(),
-                                                             domain->name);
+                                                             domain->alt_name);
 
                        if (!ADS_ERR_OK(ads_status)) {
                                DEBUG(4,("failed kerberos session setup with %s\n",
@@ -876,7 +902,10 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
                        result = ads_ntstatus(ads_status);
                        if (NT_STATUS_IS_OK(result)) {
                                /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
-                               cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
+                               result = cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
+                               if (!NT_STATUS_IS_OK(result)) {
+                                       goto done;
+                               }
                                goto session_setup_done;
                        }
                }
@@ -901,7 +930,10 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
                result = ads_ntstatus(ads_status);
                if (NT_STATUS_IS_OK(result)) {
                        /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
-                       cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
+                       result = cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
+                       if (!NT_STATUS_IS_OK(result)) {
+                               goto done;
+                       }
                        goto session_setup_done;
                }
        }
@@ -927,7 +959,10 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
                                            ipc_password, strlen(ipc_password)+1,
                                            ipc_domain))) {
                        /* Successful logon with given username. */
-                       cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
+                       result = cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
+                       if (!NT_STATUS_IS_OK(result)) {
+                               goto done;
+                       }
                        goto session_setup_done;
                } else {
                        DEBUG(4, ("authenticated session setup with user %s\\%s failed.\n",
@@ -945,7 +980,10 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
        if (NT_STATUS_IS_OK(cli_session_setup(*cli, "", NULL, 0,
                                              NULL, 0, ""))) {
                DEBUG(5, ("Connected anonymously\n"));
-               cli_init_creds(*cli, "", "", "");
+               result = cli_init_creds(*cli, "", "", "");
+               if (!NT_STATUS_IS_OK(result)) {
+                       goto done;
+               }
                goto session_setup_done;
        }
 
@@ -969,15 +1007,10 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
 
        winbindd_set_locator_kdc_envs(domain);
 
-       if (!cli_send_tconX(*cli, "IPC$", "IPC", "", 0)) {
-
-               result = cli_nt_error(*cli);
+       result = cli_tcon_andx(*cli, "IPC$", "IPC", "", 0);
 
+       if (!NT_STATUS_IS_OK(result)) {
                DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));
-
-               if (NT_STATUS_IS_OK(result))
-                       result = NT_STATUS_UNSUCCESSFUL;
-
                goto done;
        }
 
@@ -985,8 +1018,11 @@ static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
        *retry = False;
 
        /* set the domain if empty; needed for schannel connections */
-       if ( !*(*cli)->domain ) {
-               fstrcpy( (*cli)->domain, domain->name );
+       if ( !(*cli)->domain[0] ) {
+               result = cli_set_domain((*cli), domain->name);
+               if (!NT_STATUS_IS_OK(result)) {
+                       return result;
+               }
        }
 
        result = NT_STATUS_OK;
@@ -1039,7 +1075,9 @@ static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
 
        /* Make sure there's no duplicates in the list */
        for (i=0; i<*num; i++)
-               if (sockaddr_equal((struct sockaddr *)&(*dcs)[i].ss, (struct sockaddr *)pss))
+               if (sockaddr_equal(
+                           (struct sockaddr *)(void *)&(*dcs)[i].ss,
+                           (struct sockaddr *)(void *)pss))
                        return False;
 
        *dcs = TALLOC_REALLOC_ARRAY(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);
@@ -1119,7 +1157,8 @@ static bool dcip_to_name(TALLOC_CTX *mem_ctx,
                                        create_local_private_krb5_conf_for_domain(domain->alt_name,
                                                                        domain->name,
                                                                        sitename,
-                                                                       pss);
+                                                                       pss,
+                                                                       name);
 
                                        SAFE_FREE(sitename);
                                } else {
@@ -1127,7 +1166,8 @@ static bool dcip_to_name(TALLOC_CTX *mem_ctx,
                                        create_local_private_krb5_conf_for_domain(domain->alt_name,
                                                                        domain->name,
                                                                        NULL,
-                                                                       pss);
+                                                                       pss,
+                                                                       name);
                                }
                                winbindd_set_locator_kdc_envs(domain);
 
@@ -1463,7 +1503,7 @@ static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
 
                if (*domain->dcname 
                        && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
-                       && (resolve_name(domain->dcname, &domain->dcaddr, 0x20)))
+                       && (resolve_name(domain->dcname, &domain->dcaddr, 0x20, true)))
                {
                        struct sockaddr_storage *addrs = NULL;
                        int num_addrs = 0;
@@ -1536,6 +1576,10 @@ void invalidate_cm_connection(struct winbindd_cm_conn *conn)
        }
 
        if (conn->samr_pipe != NULL) {
+               if (is_valid_policy_hnd(&conn->sam_connect_handle)) {
+                       rpccli_samr_Close(conn->samr_pipe, talloc_tos(),
+                                         &conn->sam_connect_handle);
+               }
                TALLOC_FREE(conn->samr_pipe);
                /* Ok, it must be dead. Drop timeout to 0.5 sec. */
                if (conn->cli) {
@@ -1544,6 +1588,10 @@ void invalidate_cm_connection(struct winbindd_cm_conn *conn)
        }
 
        if (conn->lsa_pipe != NULL) {
+               if (is_valid_policy_hnd(&conn->lsa_policy)) {
+                       rpccli_lsa_Close(conn->lsa_pipe, talloc_tos(),
+                                        &conn->lsa_policy);
+               }
                TALLOC_FREE(conn->lsa_pipe);
                /* Ok, it must be dead. Drop timeout to 0.5 sec. */
                if (conn->cli) {
@@ -1551,6 +1599,18 @@ void invalidate_cm_connection(struct winbindd_cm_conn *conn)
                }
        }
 
+       if (conn->lsa_pipe_tcp != NULL) {
+               if (is_valid_policy_hnd(&conn->lsa_policy)) {
+                       rpccli_lsa_Close(conn->lsa_pipe, talloc_tos(),
+                                        &conn->lsa_policy);
+               }
+               TALLOC_FREE(conn->lsa_pipe_tcp);
+               /* Ok, it must be dead. Drop timeout to 0.5 sec. */
+               if (conn->cli) {
+                       cli_set_timeout(conn->cli, 500);
+               }
+       }
+
        if (conn->netlogon_pipe != NULL) {
                TALLOC_FREE(conn->netlogon_pipe);
                /* Ok, it must be dead. Drop timeout to 0.5 sec. */
@@ -1571,34 +1631,29 @@ void close_conns_after_fork(void)
        struct winbindd_domain *domain;
 
        for (domain = domain_list(); domain; domain = domain->next) {
-               if (domain->conn.cli == NULL)
-                       continue;
+               struct cli_state *cli = domain->conn.cli;
 
-               if (domain->conn.cli->fd == -1)
-                       continue;
+               /*
+                * first close the low level SMB TCP connection
+                * so that we don't generate any SMBclose
+                * requests in invalidate_cm_connection()
+                */
+               if (cli && cli->fd != -1) {
+                       close(domain->conn.cli->fd);
+                       domain->conn.cli->fd = -1;
+               }
 
-               close(domain->conn.cli->fd);
-               domain->conn.cli->fd = -1;
+               invalidate_cm_connection(&domain->conn);
        }
 }
 
 static bool connection_ok(struct winbindd_domain *domain)
 {
-       if (domain->conn.cli == NULL) {
-               DEBUG(8, ("connection_ok: Connection to %s for domain %s has NULL "
-                         "cli!\n", domain->dcname, domain->name));
-               return False;
-       }
+       bool ok;
 
-       if (!domain->conn.cli->initialised) {
-               DEBUG(3, ("connection_ok: Connection to %s for domain %s was never "
-                         "initialised!\n", domain->dcname, domain->name));
-               return False;
-       }
-
-       if (domain->conn.cli->fd == -1) {
-               DEBUG(3, ("connection_ok: Connection to %s for domain %s has died or was "
-                         "never started (fd == -1)\n", 
+       ok = cli_state_is_connected(domain->conn.cli);
+       if (!ok) {
+               DEBUG(3, ("connection_ok: Connection to %s for domain %s is not connected\n",
                          domain->dcname, domain->name));
                return False;
        }
@@ -1624,6 +1679,12 @@ static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
                return NT_STATUS_OK;
        }
 
+       if (!winbindd_can_contact_domain(domain)) {
+               invalidate_cm_connection(&domain->conn);
+               domain->initialized = True;
+               return NT_STATUS_OK;
+       }
+
        if (connection_ok(domain)) {
                if (!domain->initialized) {
                        set_dc_type_and_flags(domain);
@@ -1644,6 +1705,10 @@ static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
 
 NTSTATUS init_dc_connection(struct winbindd_domain *domain)
 {
+       if (domain->internal) {
+               return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+       }
+
        if (domain->initialized && !domain->online) {
                /* We check for online status elsewhere. */
                return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
@@ -1652,6 +1717,23 @@ NTSTATUS init_dc_connection(struct winbindd_domain *domain)
        return init_dc_connection_network(domain);
 }
 
+static NTSTATUS init_dc_connection_rpc(struct winbindd_domain *domain)
+{
+       NTSTATUS status;
+
+       status = init_dc_connection(domain);
+       if (!NT_STATUS_IS_OK(status)) {
+               return status;
+       }
+
+       if (!domain->internal && domain->conn.cli == NULL) {
+               /* happens for trusted domains without inbound trust */
+               return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
+       }
+
+       return NT_STATUS_OK;
+}
+
 /******************************************************************************
  Set the trust flags (direction and forest location) for a domain
 ******************************************************************************/
@@ -1747,9 +1829,6 @@ static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
 
                        domain->initialized = True;
 
-                       if ( !winbindd_can_contact_domain( domain) )
-                               domain->internal = True;
-
                        break;
                }               
        }
@@ -1772,8 +1851,8 @@ static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
        NTSTATUS                result;
        WERROR werr;
        TALLOC_CTX              *mem_ctx = NULL;
-       struct rpc_pipe_client  *cli;
-       POLICY_HND pol;
+       struct rpc_pipe_client  *cli = NULL;
+       struct policy_handle pol;
        union dssetup_DsRoleInfo info;
        union lsa_PolicyInformation *lsa_info = NULL;
 
@@ -1851,7 +1930,7 @@ no_dssetup:
        }
 
        result = rpccli_lsa_open_policy2(cli, mem_ctx, True, 
-                                        SEC_RIGHTS_MAXIMUM_ALLOWED, &pol);
+                                        SEC_FLAG_MAXIMUM_ALLOWED, &pol);
 
        if (NT_STATUS_IS_OK(result)) {
                /* This particular query is exactly what Win2k clients use 
@@ -1893,7 +1972,7 @@ no_dssetup:
                domain->active_directory = False;
 
                result = rpccli_lsa_open_policy(cli, mem_ctx, True, 
-                                               SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                               SEC_FLAG_MAXIMUM_ALLOWED,
                                                &pol);
 
                if (!NT_STATUS_IS_OK(result)) {
@@ -1925,6 +2004,8 @@ done:
        DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
                  domain->name, domain->active_directory ? "" : "NOT "));
 
+       domain->can_do_ncacn_ip_tcp = domain->active_directory;
+
        TALLOC_FREE(cli);
 
        TALLOC_FREE(mem_ctx);
@@ -1963,8 +2044,8 @@ static void set_dc_type_and_flags( struct winbindd_domain *domain )
 /**********************************************************************
 ***********************************************************************/
 
-static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
-                                  struct dcinfo **ppdc)
+static bool cm_get_schannel_creds(struct winbindd_domain *domain,
+                                  struct netlogon_creds_CredentialState **ppdc)
 {
        NTSTATUS result;
        struct rpc_pipe_client *netlogon_pipe;
@@ -1978,7 +2059,7 @@ static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
                return False;
        }
 
-       /* Return a pointer to the struct dcinfo from the
+       /* Return a pointer to the struct netlogon_creds_CredentialState from the
           netlogon pipe. */
 
        if (!domain->conn.netlogon_pipe->dc) {
@@ -1990,27 +2071,35 @@ static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
 }
 
 NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
-                       struct rpc_pipe_client **cli, POLICY_HND *sam_handle)
+                       struct rpc_pipe_client **cli, struct policy_handle *sam_handle)
 {
        struct winbindd_cm_conn *conn;
        NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
-       fstring conn_pwd;
-       struct dcinfo *p_dcinfo;
+       struct netlogon_creds_CredentialState *p_creds;
        char *machine_password = NULL;
        char *machine_account = NULL;
        char *domain_name = NULL;
 
-       result = init_dc_connection(domain);
+       if (strequal(domain->name, get_global_sam_name())) {
+               result = open_internal_samr_conn(mem_ctx, domain, cli, sam_handle);
+               if (!NT_STATUS_IS_OK(result)) {
+                       return result;
+               }
+               return NT_STATUS_OK;
+       }
+
+       result = init_dc_connection_rpc(domain);
        if (!NT_STATUS_IS_OK(result)) {
                return result;
        }
 
        conn = &domain->conn;
 
-       if (conn->samr_pipe != NULL) {
+       if (rpccli_is_connected(conn->samr_pipe)) {
                goto done;
        }
 
+       TALLOC_FREE(conn->samr_pipe);
 
        /*
         * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
@@ -2019,10 +2108,9 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
         * anonymous.
         */
 
-       pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
        if ((conn->cli->user_name[0] == '\0') ||
            (conn->cli->domain[0] == '\0') || 
-           (conn_pwd[0] == '\0'))
+           (conn->cli->password == NULL || conn->cli->password[0] == '\0'))
        {
                result = get_trust_creds(domain, &machine_password,
                                         &machine_account, NULL);
@@ -2033,7 +2121,7 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
                }
                domain_name = domain->name;
        } else {
-               machine_password = SMB_STRDUP(conn_pwd);                
+               machine_password = SMB_STRDUP(conn->cli->password);
                machine_account = SMB_STRDUP(conn->cli->user_name);
                domain_name = conn->cli->domain;
        }
@@ -2047,7 +2135,8 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
           authenticated SAMR pipe with sign & seal. */
        result = cli_rpc_pipe_open_spnego_ntlmssp(conn->cli,
                                                  &ndr_table_samr.syntax_id,
-                                                 PIPE_AUTH_LEVEL_PRIVACY,
+                                                 NCACN_NP,
+                                                 DCERPC_AUTH_LEVEL_PRIVACY,
                                                  domain_name,
                                                  machine_account,
                                                  machine_password,
@@ -2069,7 +2158,7 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
 
        result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
                                      conn->samr_pipe->desthost,
-                                     SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                     SEC_FLAG_MAXIMUM_ALLOWED,
                                      &conn->sam_connect_handle);
        if (NT_STATUS_IS_OK(result)) {
                goto open_domain;
@@ -2083,15 +2172,16 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
 
        /* Fall back to schannel if it's a W2K pre-SP1 box. */
 
-       if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
+       if (!cm_get_schannel_creds(domain, &p_creds)) {
                /* If this call fails - conn->cli can now be NULL ! */
                DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
                           "for domain %s, trying anon\n", domain->name));
                goto anonymous;
        }
        result = cli_rpc_pipe_open_schannel_with_key
-               (conn->cli, &ndr_table_samr.syntax_id, PIPE_AUTH_LEVEL_PRIVACY,
-                domain->name, p_dcinfo, &conn->samr_pipe);
+               (conn->cli, &ndr_table_samr.syntax_id, NCACN_NP,
+                DCERPC_AUTH_LEVEL_PRIVACY,
+                domain->name, &p_creds, &conn->samr_pipe);
 
        if (!NT_STATUS_IS_OK(result)) {
                DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
@@ -2104,7 +2194,7 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
 
        result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
                                      conn->samr_pipe->desthost,
-                                     SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                     SEC_FLAG_MAXIMUM_ALLOWED,
                                      &conn->sam_connect_handle);
        if (NT_STATUS_IS_OK(result)) {
                goto open_domain;
@@ -2126,7 +2216,7 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
 
        result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
                                      conn->samr_pipe->desthost,
-                                     SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                     SEC_FLAG_MAXIMUM_ALLOWED,
                                      &conn->sam_connect_handle);
        if (!NT_STATUS_IS_OK(result)) {
                DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
@@ -2139,13 +2229,24 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
        result = rpccli_samr_OpenDomain(conn->samr_pipe,
                                        mem_ctx,
                                        &conn->sam_connect_handle,
-                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                       SEC_FLAG_MAXIMUM_ALLOWED,
                                        &domain->sid,
                                        &conn->sam_domain_handle);
 
  done:
 
-       if (!NT_STATUS_IS_OK(result)) {
+       if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)) {
+               /*
+                * if we got access denied, we might just have no access rights
+                * to talk to the remote samr server server (e.g. when we are a
+                * PDC and we are connecting a w2k8 pdc via an interdomain
+                * trust). In that case do not invalidate the whole connection
+                * stack
+                */
+               TALLOC_FREE(conn->samr_pipe);
+               ZERO_STRUCT(conn->sam_domain_handle);
+               return result;
+       } else if (!NT_STATUS_IS_OK(result)) {
                invalidate_cm_connection(conn);
                return result;
        }
@@ -2157,28 +2258,86 @@ NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
        return result;
 }
 
+/**********************************************************************
+ open an schanneld ncacn_ip_tcp connection to LSA
+***********************************************************************/
+
+NTSTATUS cm_connect_lsa_tcp(struct winbindd_domain *domain,
+                           TALLOC_CTX *mem_ctx,
+                           struct rpc_pipe_client **cli)
+{
+       struct winbindd_cm_conn *conn;
+       struct netlogon_creds_CredentialState *creds;
+       NTSTATUS status;
+
+       DEBUG(10,("cm_connect_lsa_tcp\n"));
+
+       status = init_dc_connection_rpc(domain);
+       if (!NT_STATUS_IS_OK(status)) {
+               return status;
+       }
+
+       conn = &domain->conn;
+
+       if (conn->lsa_pipe_tcp &&
+           conn->lsa_pipe_tcp->transport->transport == NCACN_IP_TCP &&
+           conn->lsa_pipe_tcp->auth->auth_level == DCERPC_AUTH_LEVEL_PRIVACY &&
+           rpccli_is_connected(conn->lsa_pipe_tcp)) {
+               goto done;
+       }
+
+       TALLOC_FREE(conn->lsa_pipe_tcp);
+
+       if (!cm_get_schannel_creds(domain, &creds)) {
+               goto done;
+       }
+
+       status = cli_rpc_pipe_open_schannel_with_key(conn->cli,
+                                                    &ndr_table_lsarpc.syntax_id,
+                                                    NCACN_IP_TCP,
+                                                    DCERPC_AUTH_LEVEL_PRIVACY,
+                                                    domain->name,
+                                                    &creds,
+                                                    &conn->lsa_pipe_tcp);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(10,("cli_rpc_pipe_open_schannel_with_key failed: %s\n",
+                       nt_errstr(status)));
+               goto done;
+       }
+
+ done:
+       if (!NT_STATUS_IS_OK(status)) {
+               TALLOC_FREE(conn->lsa_pipe_tcp);
+               return status;
+       }
+
+       *cli = conn->lsa_pipe_tcp;
+
+       return status;
+}
+
 NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
-                       struct rpc_pipe_client **cli, POLICY_HND *lsa_policy)
+                       struct rpc_pipe_client **cli, struct policy_handle *lsa_policy)
 {
        struct winbindd_cm_conn *conn;
        NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
-       fstring conn_pwd;
-       struct dcinfo *p_dcinfo;
+       struct netlogon_creds_CredentialState *p_creds;
 
-       result = init_dc_connection(domain);
+       result = init_dc_connection_rpc(domain);
        if (!NT_STATUS_IS_OK(result))
                return result;
 
        conn = &domain->conn;
 
-       if (conn->lsa_pipe != NULL) {
+       if (rpccli_is_connected(conn->lsa_pipe)) {
                goto done;
        }
 
-       pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
+       TALLOC_FREE(conn->lsa_pipe);
+
        if ((conn->cli->user_name[0] == '\0') ||
            (conn->cli->domain[0] == '\0') || 
-           (conn_pwd[0] == '\0')) {
+           (conn->cli->password == NULL || conn->cli->password[0] == '\0')) {
                DEBUG(10, ("cm_connect_lsa: No no user available for "
                           "domain %s, trying schannel\n", conn->cli->domain));
                goto schannel;
@@ -2187,9 +2346,9 @@ NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
        /* We have an authenticated connection. Use a NTLMSSP SPNEGO
         * authenticated LSA pipe with sign & seal. */
        result = cli_rpc_pipe_open_spnego_ntlmssp
-               (conn->cli, &ndr_table_lsarpc.syntax_id,
-                PIPE_AUTH_LEVEL_PRIVACY,
-                conn->cli->domain, conn->cli->user_name, conn_pwd,
+               (conn->cli, &ndr_table_lsarpc.syntax_id, NCACN_NP,
+                DCERPC_AUTH_LEVEL_PRIVACY,
+                conn->cli->domain, conn->cli->user_name, conn->cli->password,
                 &conn->lsa_pipe);
 
        if (!NT_STATUS_IS_OK(result)) {
@@ -2206,7 +2365,7 @@ NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
                  domain->name, conn->cli->domain, conn->cli->user_name ));
 
        result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
-                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                       SEC_FLAG_MAXIMUM_ALLOWED,
                                        &conn->lsa_policy);
        if (NT_STATUS_IS_OK(result)) {
                goto done;
@@ -2221,16 +2380,16 @@ NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
 
        /* Fall back to schannel if it's a W2K pre-SP1 box. */
 
-       if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
+       if (!cm_get_schannel_creds(domain, &p_creds)) {
                /* If this call fails - conn->cli can now be NULL ! */
                DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
                           "for domain %s, trying anon\n", domain->name));
                goto anonymous;
        }
        result = cli_rpc_pipe_open_schannel_with_key
-               (conn->cli, &ndr_table_lsarpc.syntax_id,
-                PIPE_AUTH_LEVEL_PRIVACY,
-                domain->name, p_dcinfo, &conn->lsa_pipe);
+               (conn->cli, &ndr_table_lsarpc.syntax_id, NCACN_NP,
+                DCERPC_AUTH_LEVEL_PRIVACY,
+                domain->name, &p_creds, &conn->lsa_pipe);
 
        if (!NT_STATUS_IS_OK(result)) {
                DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
@@ -2242,7 +2401,7 @@ NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
                  "schannel.\n", domain->name ));
 
        result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
-                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                       SEC_FLAG_MAXIMUM_ALLOWED,
                                        &conn->lsa_policy);
        if (NT_STATUS_IS_OK(result)) {
                goto done;
@@ -2264,7 +2423,7 @@ NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
        }
 
        result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
-                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
+                                       SEC_FLAG_MAXIMUM_ALLOWED,
                                        &conn->lsa_policy);
  done:
        if (!NT_STATUS_IS_OK(result)) {
@@ -2290,24 +2449,26 @@ NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
 
        uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
        uint8  mach_pwd[16];
-       uint32  sec_chan_type;
+       enum netr_SchannelType sec_chan_type;
        const char *account_name;
        struct rpc_pipe_client *netlogon_pipe = NULL;
 
        *cli = NULL;
 
-       result = init_dc_connection(domain);
+       result = init_dc_connection_rpc(domain);
        if (!NT_STATUS_IS_OK(result)) {
                return result;
        }
 
        conn = &domain->conn;
 
-       if (conn->netlogon_pipe != NULL) {
+       if (rpccli_is_connected(conn->netlogon_pipe)) {
                *cli = conn->netlogon_pipe;
                return NT_STATUS_OK;
        }
 
+       TALLOC_FREE(conn->netlogon_pipe);
+
        result = cli_rpc_pipe_open_noauth(conn->cli,
                                          &ndr_table_netlogon.syntax_id,
                                          &netlogon_pipe);
@@ -2375,8 +2536,8 @@ NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
        */
 
        result = cli_rpc_pipe_open_schannel_with_key(
-               conn->cli, &ndr_table_netlogon.syntax_id,
-               PIPE_AUTH_LEVEL_PRIVACY, domain->name, netlogon_pipe->dc,
+               conn->cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
+               DCERPC_AUTH_LEVEL_PRIVACY, domain->name, &netlogon_pipe->dc,
                &conn->netlogon_pipe);
 
        /* We can now close the initial netlogon pipe. */
@@ -2386,14 +2547,18 @@ NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
                DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
                          "was %s\n", nt_errstr(result)));
 
-               /* make sure we return something besides OK */
-               return !NT_STATUS_IS_OK(result) ? result : NT_STATUS_PIPE_NOT_AVAILABLE;
+               invalidate_cm_connection(conn);
+               return result;
        }
 
        /*
-        * Try NetSamLogonEx for AD domains
+        * Always try netr_LogonSamLogonEx. We will fall back for NT4
+        * which gives DCERPC_FAULT_OP_RNG_ERROR (function not
+        * supported). We used to only try SamLogonEx for AD, but
+        * Samba DCs can also do it. And because we don't distinguish
+        * between Samba and NT4, always try it once.
         */
-       domain->can_do_samlogon_ex = domain->active_directory;
+       domain->can_do_samlogon_ex = true;
 
        *cli = conn->netlogon_pipe;
        return NT_STATUS_OK;