summaryrefslogtreecommitdiffstats
path: root/source3/libsmb/libsmb_server.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--source3/libsmb/libsmb_server.c910
1 files changed, 910 insertions, 0 deletions
diff --git a/source3/libsmb/libsmb_server.c b/source3/libsmb/libsmb_server.c
new file mode 100644
index 0000000..69b51b8
--- /dev/null
+++ b/source3/libsmb/libsmb_server.c
@@ -0,0 +1,910 @@
+/*
+ Unix SMB/Netbios implementation.
+ SMB client library implementation
+ Copyright (C) Andrew Tridgell 1998
+ Copyright (C) Richard Sharpe 2000, 2002
+ Copyright (C) John Terpstra 2000
+ Copyright (C) Tom Jansen (Ninja ISD) 2002
+ Copyright (C) Derrell Lipman 2003-2008
+ Copyright (C) Jeremy Allison 2007, 2008
+ Copyright (C) SATOH Fumiyasu <fumiyas@osstech.co.jp> 2009.
+
+ 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/>.
+*/
+
+#include "includes.h"
+#include "libsmb/libsmb.h"
+#include "libsmbclient.h"
+#include "libsmb_internal.h"
+#include "../librpc/gen_ndr/ndr_lsa.h"
+#include "rpc_client/cli_pipe.h"
+#include "rpc_client/cli_lsarpc.h"
+#include "libcli/security/security.h"
+#include "libsmb/nmblib.h"
+#include "../libcli/smb/smbXcli_base.h"
+
+/*
+ * Check a server for being alive and well.
+ * returns 0 if the server is in shape. Returns 1 on error
+ *
+ * Also usable outside libsmbclient to enable external cache
+ * to do some checks too.
+ */
+int
+SMBC_check_server(SMBCCTX * context,
+ SMBCSRV * server)
+{
+ time_t now;
+
+ if (!cli_state_is_connected(server->cli)) {
+ return 1;
+ }
+
+ now = time_mono(NULL);
+
+ if (server->last_echo_time == (time_t)0 ||
+ now > server->last_echo_time +
+ (server->cli->timeout/1000)) {
+ unsigned char data[16] = {0};
+ NTSTATUS status = cli_echo(server->cli,
+ 1,
+ data_blob_const(data, sizeof(data)));
+ if (!NT_STATUS_IS_OK(status)) {
+ bool ok = false;
+ /*
+ * Some SMB2 servers (not Samba or Windows)
+ * check the session status on SMB2_ECHO and return
+ * NT_STATUS_USER_SESSION_DELETED
+ * if the session was not set. That's OK, they still
+ * replied.
+ * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13218
+ */
+ if (smbXcli_conn_protocol(server->cli->conn) >=
+ PROTOCOL_SMB2_02) {
+ if (NT_STATUS_EQUAL(status,
+ NT_STATUS_USER_SESSION_DELETED)) {
+ ok = true;
+ }
+ }
+ /*
+ * Some NetApp servers return
+ * NT_STATUS_INVALID_PARAMETER.That's OK, they still
+ * replied.
+ * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13007
+ */
+ if (NT_STATUS_EQUAL(status,
+ NT_STATUS_INVALID_PARAMETER)) {
+ ok = true;
+ }
+ if (!ok) {
+ return 1;
+ }
+ }
+ server->last_echo_time = now;
+ }
+ return 0;
+}
+
+/*
+ * Remove a server from the cached server list it's unused.
+ * On success, 0 is returned. 1 is returned if the server could not be removed.
+ *
+ * Also usable outside libsmbclient
+ */
+int
+SMBC_remove_unused_server(SMBCCTX * context,
+ SMBCSRV * srv)
+{
+ SMBCFILE * file;
+
+ /* are we being fooled ? */
+ if (!context || !context->internal->initialized || !srv) {
+ return 1;
+ }
+
+ /* Check all open files/directories for a relation with this server */
+ for (file = context->internal->files; file; file = file->next) {
+ if (file->srv == srv) {
+ /* Still used */
+ DEBUG(3, ("smbc_remove_usused_server: "
+ "%p still used by %p.\n",
+ srv, file));
+ return 1;
+ }
+ }
+
+ DLIST_REMOVE(context->internal->servers, srv);
+
+ cli_shutdown(srv->cli);
+ srv->cli = NULL;
+
+ DEBUG(3, ("smbc_remove_usused_server: %p removed.\n", srv));
+
+ smbc_getFunctionRemoveCachedServer(context)(context, srv);
+
+ SAFE_FREE(srv);
+ return 0;
+}
+
+/****************************************************************
+ * Call the auth_fn with fixed size (fstring) buffers.
+ ***************************************************************/
+static void
+SMBC_call_auth_fn(TALLOC_CTX *ctx,
+ SMBCCTX *context,
+ const char *server,
+ const char *share,
+ char **pp_workgroup,
+ char **pp_username,
+ char **pp_password)
+{
+ fstring workgroup = { 0 };
+ fstring username = { 0 };
+ fstring password = { 0 };
+ smbc_get_auth_data_with_context_fn auth_with_context_fn;
+
+ if (*pp_workgroup != NULL) {
+ strlcpy(workgroup, *pp_workgroup, sizeof(workgroup));
+ }
+ if (*pp_username != NULL) {
+ strlcpy(username, *pp_username, sizeof(username));
+ }
+ if (*pp_password != NULL) {
+ strlcpy(password, *pp_password, sizeof(password));
+ }
+
+ /* See if there's an authentication with context function provided */
+ auth_with_context_fn = smbc_getFunctionAuthDataWithContext(context);
+ if (auth_with_context_fn)
+ {
+ (* auth_with_context_fn)(context,
+ server, share,
+ workgroup, sizeof(workgroup),
+ username, sizeof(username),
+ password, sizeof(password));
+ }
+ else
+ {
+ smbc_getFunctionAuthData(context)(server, share,
+ workgroup, sizeof(workgroup),
+ username, sizeof(username),
+ password, sizeof(password));
+ }
+
+ TALLOC_FREE(*pp_workgroup);
+ TALLOC_FREE(*pp_username);
+ TALLOC_FREE(*pp_password);
+
+ *pp_workgroup = talloc_strdup(ctx, workgroup);
+ *pp_username = talloc_strdup(ctx, username);
+ *pp_password = talloc_strdup(ctx, password);
+}
+
+
+void
+SMBC_get_auth_data(const char *server, const char *share,
+ char *workgroup_buf, int workgroup_buf_len,
+ char *username_buf, int username_buf_len,
+ char *password_buf, int password_buf_len)
+{
+ /* Default function just uses provided data. Nothing to do. */
+}
+
+
+
+SMBCSRV *
+SMBC_find_server(TALLOC_CTX *ctx,
+ SMBCCTX *context,
+ const char *server,
+ const char *share,
+ char **pp_workgroup,
+ char **pp_username,
+ char **pp_password)
+{
+ SMBCSRV *srv;
+ int auth_called = 0;
+
+ if (!pp_workgroup || !pp_username || !pp_password) {
+ return NULL;
+ }
+
+check_server_cache:
+
+ srv = smbc_getFunctionGetCachedServer(context)(context,
+ server, share,
+ *pp_workgroup,
+ *pp_username);
+
+ if (!auth_called && !srv && (!*pp_username || !(*pp_username)[0] ||
+ !*pp_password || !(*pp_password)[0])) {
+ SMBC_call_auth_fn(ctx, context, server, share,
+ pp_workgroup, pp_username, pp_password);
+
+ /*
+ * However, smbc_auth_fn may have picked up info relating to
+ * an existing connection, so try for an existing connection
+ * again ...
+ */
+ auth_called = 1;
+ goto check_server_cache;
+
+ }
+
+ if (srv) {
+ if (smbc_getFunctionCheckServer(context)(context, srv)) {
+ /*
+ * This server is no good anymore
+ * Try to remove it and check for more possible
+ * servers in the cache
+ */
+ if (smbc_getFunctionRemoveUnusedServer(context)(context,
+ srv)) {
+ /*
+ * We could not remove the server completely,
+ * remove it from the cache so we will not get
+ * it again. It will be removed when the last
+ * file/dir is closed.
+ */
+ smbc_getFunctionRemoveCachedServer(context)(context,
+ srv);
+ }
+
+ /*
+ * Maybe there are more cached connections to this
+ * server
+ */
+ goto check_server_cache;
+ }
+
+ return srv;
+ }
+
+ return NULL;
+}
+
+static struct cli_credentials *SMBC_auth_credentials(TALLOC_CTX *mem_ctx,
+ SMBCCTX *context,
+ const char *domain,
+ const char *username,
+ const char *password)
+{
+ struct cli_credentials *creds = NULL;
+ bool use_kerberos = false;
+ bool fallback_after_kerberos = false;
+ bool use_ccache = false;
+ bool pw_nt_hash = false;
+
+ use_kerberos = smbc_getOptionUseKerberos(context);
+ fallback_after_kerberos = smbc_getOptionFallbackAfterKerberos(context);
+ use_ccache = smbc_getOptionUseCCache(context);
+ pw_nt_hash = smbc_getOptionUseNTHash(context);
+
+ creds = cli_session_creds_init(mem_ctx,
+ username,
+ domain,
+ NULL, /* realm */
+ password,
+ use_kerberos,
+ fallback_after_kerberos,
+ use_ccache,
+ pw_nt_hash);
+ if (creds == NULL) {
+ return NULL;
+ }
+
+ switch (context->internal->smb_encryption_level) {
+ case SMBC_ENCRYPTLEVEL_DEFAULT:
+ /* Use the config option */
+ break;
+ case SMBC_ENCRYPTLEVEL_NONE:
+ (void)cli_credentials_set_smb_encryption(
+ creds,
+ SMB_ENCRYPTION_OFF,
+ CRED_SPECIFIED);
+ break;
+ case SMBC_ENCRYPTLEVEL_REQUEST:
+ (void)cli_credentials_set_smb_encryption(
+ creds,
+ SMB_ENCRYPTION_DESIRED,
+ CRED_SPECIFIED);
+ break;
+ case SMBC_ENCRYPTLEVEL_REQUIRE:
+ default:
+ (void)cli_credentials_set_smb_encryption(
+ creds,
+ SMB_ENCRYPTION_REQUIRED,
+ CRED_SPECIFIED);
+ break;
+ }
+
+
+ return creds;
+}
+
+/*
+ * Connect to a server, possibly on an existing connection
+ *
+ * Here, what we want to do is: If the server and username
+ * match an existing connection, reuse that, otherwise, establish a
+ * new connection.
+ *
+ * If we have to create a new connection, call the auth_fn to get the
+ * info we need, unless the username and password were passed in.
+ */
+
+static SMBCSRV *
+SMBC_server_internal(TALLOC_CTX *ctx,
+ SMBCCTX *context,
+ bool connect_if_not_found,
+ const char *server,
+ uint16_t port,
+ const char *share,
+ char **pp_workgroup,
+ char **pp_username,
+ char **pp_password,
+ bool *in_cache)
+{
+ SMBCSRV *srv=NULL;
+ char *workgroup = NULL;
+ struct cli_state *c = NULL;
+ const char *server_n = server;
+ int is_ipc = (share != NULL && strcmp(share, "IPC$") == 0);
+ uint32_t fs_attrs = 0;
+ const char *username_used = NULL;
+ const char *password_used = NULL;
+ NTSTATUS status;
+ char *newserver, *newshare;
+ int flags = 0;
+ struct smbXcli_tcon *tcon = NULL;
+ int signing_state = SMB_SIGNING_DEFAULT;
+ struct cli_credentials *creds = NULL;
+
+ *in_cache = false;
+
+ if (server[0] == 0) {
+ errno = EPERM;
+ return NULL;
+ }
+
+ /* Look for a cached connection */
+ srv = SMBC_find_server(ctx, context, server, share,
+ pp_workgroup, pp_username, pp_password);
+
+ /*
+ * If we found a connection and we're only allowed one share per
+ * server...
+ */
+ if (srv &&
+ share != NULL && *share != '\0' &&
+ smbc_getOptionOneSharePerServer(context)) {
+
+ /*
+ * ... then if there's no current connection to the share,
+ * connect to it. SMBC_find_server(), or rather the function
+ * pointed to by context->get_cached_srv_fn which
+ * was called by SMBC_find_server(), will have issued a tree
+ * disconnect if the requested share is not the same as the
+ * one that was already connected.
+ */
+
+ /*
+ * Use srv->cli->desthost and srv->cli->share instead of
+ * server and share below to connect to the actual share,
+ * i.e., a normal share or a referred share from
+ * 'msdfs proxy' share.
+ */
+ if (!cli_state_has_tcon(srv->cli)) {
+ /* Ensure we have accurate auth info */
+ SMBC_call_auth_fn(ctx, context,
+ smbXcli_conn_remote_name(srv->cli->conn),
+ srv->cli->share,
+ pp_workgroup,
+ pp_username,
+ pp_password);
+
+ if (!*pp_workgroup || !*pp_username || !*pp_password) {
+ errno = ENOMEM;
+ cli_shutdown(srv->cli);
+ srv->cli = NULL;
+ smbc_getFunctionRemoveCachedServer(context)(context,
+ srv);
+ return NULL;
+ }
+
+ /*
+ * We don't need to renegotiate encryption
+ * here as the encryption context is not per
+ * tid.
+ */
+
+ status = cli_tree_connect(srv->cli,
+ srv->cli->share,
+ "?????",
+ *pp_password);
+ if (!NT_STATUS_IS_OK(status)) {
+ cli_shutdown(srv->cli);
+ errno = map_errno_from_nt_status(status);
+ srv->cli = NULL;
+ smbc_getFunctionRemoveCachedServer(context)(context,
+ srv);
+ srv = NULL;
+ goto not_found;
+ }
+
+ /* Determine if this share supports case sensitivity */
+ if (is_ipc) {
+ DEBUG(4,
+ ("IPC$ so ignore case sensitivity\n"));
+ status = NT_STATUS_OK;
+ } else {
+ status = cli_get_fs_attr_info(srv->cli, &fs_attrs);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(4, ("Could not retrieve "
+ "case sensitivity flag: %s.\n",
+ nt_errstr(status)));
+
+ /*
+ * We can't determine the case sensitivity of
+ * the share. We have no choice but to use the
+ * user-specified case sensitivity setting.
+ */
+ if (smbc_getOptionCaseSensitive(context)) {
+ cli_set_case_sensitive(srv->cli, true);
+ } else {
+ cli_set_case_sensitive(srv->cli, false);
+ }
+ } else if (!is_ipc) {
+ DEBUG(4,
+ ("Case sensitive: %s\n",
+ (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
+ ? "True"
+ : "False")));
+ cli_set_case_sensitive(
+ srv->cli,
+ (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
+ ? True
+ : False));
+ }
+
+ /*
+ * Regenerate the dev value since it's based on both
+ * server and share
+ */
+ if (srv) {
+ const char *remote_name =
+ smbXcli_conn_remote_name(srv->cli->conn);
+
+ srv->dev = (dev_t)(str_checksum(remote_name) ^
+ str_checksum(srv->cli->share));
+ }
+ }
+ }
+
+ not_found:
+
+ /* If we have a connection... */
+ if (srv) {
+
+ /* ... then we're done here. Give 'em what they came for. */
+ *in_cache = true;
+ goto done;
+ }
+
+ /* If we're not asked to connect when a connection doesn't exist... */
+ if (! connect_if_not_found) {
+ /* ... then we're done here. */
+ return NULL;
+ }
+
+ if (!*pp_workgroup || !*pp_username || !*pp_password) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n, server));
+
+ DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n, server));
+
+ status = NT_STATUS_UNSUCCESSFUL;
+
+ if (context->internal->smb_encryption_level > SMBC_ENCRYPTLEVEL_NONE) {
+ signing_state = SMB_SIGNING_REQUIRED;
+ }
+
+ if (port == 0) {
+ if (share == NULL || *share == '\0' || is_ipc) {
+ /*
+ * Try 139 first for IPC$
+ */
+ status = cli_connect_nb(server_n, NULL, NBT_SMB_PORT, 0x20,
+ smbc_getNetbiosName(context),
+ signing_state, flags, &c);
+ }
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * No IPC$ or 139 did not work
+ */
+ status = cli_connect_nb(server_n, NULL, port, 0x20,
+ smbc_getNetbiosName(context),
+ signing_state, flags, &c);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
+ DBG_ERR("NetBIOS support disabled, unable to connect\n");
+ }
+
+ errno = map_errno_from_nt_status(status);
+ return NULL;
+ }
+
+ cli_set_timeout(c, smbc_getTimeout(context));
+
+ status = smbXcli_negprot(c->conn,
+ c->timeout,
+ lp_client_min_protocol(),
+ lp_client_max_protocol(),
+ NULL,
+ NULL,
+ NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ cli_shutdown(c);
+ errno = map_errno_from_nt_status(status);
+ return NULL;
+ }
+
+ if (smbXcli_conn_protocol(c->conn) >= PROTOCOL_SMB2_02) {
+ /* Ensure we ask for some initial credits. */
+ smb2cli_conn_set_max_credits(c->conn, DEFAULT_SMB2_MAX_CREDITS);
+ }
+
+ username_used = *pp_username;
+ password_used = *pp_password;
+
+ creds = SMBC_auth_credentials(c,
+ context,
+ *pp_workgroup,
+ username_used,
+ password_used);
+ if (creds == NULL) {
+ cli_shutdown(c);
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ status = cli_session_setup_creds(c, creds);
+ if (!NT_STATUS_IS_OK(status)) {
+
+ /* Failed. Try an anonymous login, if allowed by flags. */
+ username_used = "";
+ password_used = "";
+
+ if (smbc_getOptionNoAutoAnonymousLogin(context) ||
+ !NT_STATUS_IS_OK(cli_session_setup_anon(c))) {
+
+ cli_shutdown(c);
+ errno = map_errno_from_nt_status(status);
+ return NULL;
+ }
+ }
+
+ DEBUG(4,(" session setup ok\n"));
+
+ /* here's the fun part....to support 'msdfs proxy' shares
+ (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
+ here before trying to connect to the original share.
+ cli_check_msdfs_proxy() will fail if it is a normal share. */
+
+ if (smbXcli_conn_dfs_supported(c->conn) &&
+ cli_check_msdfs_proxy(ctx, c, share,
+ &newserver, &newshare,
+ creds)) {
+ cli_shutdown(c);
+ srv = SMBC_server_internal(ctx, context, connect_if_not_found,
+ newserver, port, newshare, pp_workgroup,
+ pp_username, pp_password, in_cache);
+ TALLOC_FREE(newserver);
+ TALLOC_FREE(newshare);
+ return srv;
+ }
+
+ /* must be a normal share */
+
+ status = cli_tree_connect_creds(c, share, "?????", creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ cli_shutdown(c);
+ errno = map_errno_from_nt_status(status);
+ return NULL;
+ }
+
+ DEBUG(4,(" tconx ok\n"));
+
+ if (smbXcli_conn_protocol(c->conn) >= PROTOCOL_SMB2_02) {
+ tcon = c->smb2.tcon;
+ } else {
+ tcon = c->smb1.tcon;
+ }
+
+ /* Determine if this share supports case sensitivity */
+ if (is_ipc) {
+ DEBUG(4, ("IPC$ so ignore case sensitivity\n"));
+ status = NT_STATUS_OK;
+ } else {
+ status = cli_get_fs_attr_info(c, &fs_attrs);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(4, ("Could not retrieve case sensitivity flag: %s.\n",
+ nt_errstr(status)));
+
+ /*
+ * We can't determine the case sensitivity of the share. We
+ * have no choice but to use the user-specified case
+ * sensitivity setting.
+ */
+ if (smbc_getOptionCaseSensitive(context)) {
+ cli_set_case_sensitive(c, True);
+ } else {
+ cli_set_case_sensitive(c, False);
+ }
+ } else if (!is_ipc) {
+ DEBUG(4, ("Case sensitive: %s\n",
+ (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
+ ? "True"
+ : "False")));
+ smbXcli_tcon_set_fs_attributes(tcon, fs_attrs);
+ }
+
+ /*
+ * Ok, we have got a nice connection
+ * Let's allocate a server structure.
+ */
+
+ srv = SMB_MALLOC_P(SMBCSRV);
+ if (!srv) {
+ cli_shutdown(c);
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ ZERO_STRUCTP(srv);
+ DLIST_ADD(srv->cli, c);
+ srv->dev = (dev_t)(str_checksum(server) ^ str_checksum(share));
+ srv->no_pathinfo = False;
+ srv->no_pathinfo2 = False;
+ srv->no_pathinfo3 = False;
+ srv->no_nt_session = False;
+
+done:
+ if (!pp_workgroup || !*pp_workgroup || !**pp_workgroup) {
+ workgroup = talloc_strdup(ctx, smbc_getWorkgroup(context));
+ } else {
+ workgroup = *pp_workgroup;
+ }
+ if(!workgroup) {
+ if (c != NULL) {
+ cli_shutdown(c);
+ }
+ SAFE_FREE(srv);
+ return NULL;
+ }
+
+ /* set the credentials to make DFS work */
+ smbc_set_credentials_with_fallback(context,
+ workgroup,
+ *pp_username,
+ *pp_password);
+
+ return srv;
+}
+
+SMBCSRV *
+SMBC_server(TALLOC_CTX *ctx,
+ SMBCCTX *context,
+ bool connect_if_not_found,
+ const char *server,
+ uint16_t port,
+ const char *share,
+ char **pp_workgroup,
+ char **pp_username,
+ char **pp_password)
+{
+ SMBCSRV *srv=NULL;
+ bool in_cache = false;
+
+ srv = SMBC_server_internal(ctx, context, connect_if_not_found,
+ server, port, share, pp_workgroup,
+ pp_username, pp_password, &in_cache);
+
+ if (!srv) {
+ return NULL;
+ }
+ if (in_cache) {
+ return srv;
+ }
+
+ /* Now add it to the cache (internal or external) */
+ /* Let the cache function set errno if it wants to */
+ errno = 0;
+ if (smbc_getFunctionAddCachedServer(context)(context, srv,
+ server, share,
+ *pp_workgroup,
+ *pp_username)) {
+ int saved_errno = errno;
+ DEBUG(3, (" Failed to add server to cache\n"));
+ errno = saved_errno;
+ if (errno == 0) {
+ errno = ENOMEM;
+ }
+ SAFE_FREE(srv);
+ return NULL;
+ }
+
+ DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
+ server, share, srv));
+
+ DLIST_ADD(context->internal->servers, srv);
+ return srv;
+}
+
+/*
+ * Connect to a server for getting/setting attributes, possibly on an existing
+ * connection. This works similarly to SMBC_server().
+ */
+SMBCSRV *
+SMBC_attr_server(TALLOC_CTX *ctx,
+ SMBCCTX *context,
+ const char *server,
+ uint16_t port,
+ const char *share,
+ char **pp_workgroup,
+ char **pp_username,
+ char **pp_password)
+{
+ int flags;
+ struct cli_state *ipc_cli = NULL;
+ struct rpc_pipe_client *pipe_hnd = NULL;
+ NTSTATUS nt_status;
+ SMBCSRV *srv=NULL;
+ SMBCSRV *ipc_srv=NULL;
+
+ /*
+ * Use srv->cli->desthost and srv->cli->share instead of
+ * server and share below to connect to the actual share,
+ * i.e., a normal share or a referred share from
+ * 'msdfs proxy' share.
+ */
+ srv = SMBC_server(ctx, context, true, server, port, share,
+ pp_workgroup, pp_username, pp_password);
+ if (!srv) {
+ return NULL;
+ }
+ server = smbXcli_conn_remote_name(srv->cli->conn);
+ share = srv->cli->share;
+
+ /*
+ * See if we've already created this special connection. Reference
+ * our "special" share name '*IPC$', which is an impossible real share
+ * name due to the leading asterisk.
+ */
+ ipc_srv = SMBC_find_server(ctx, context, server, "*IPC$",
+ pp_workgroup, pp_username, pp_password);
+ if (!ipc_srv) {
+ struct cli_credentials *creds = NULL;
+
+ /* We didn't find a cached connection. Get the password */
+ if (!*pp_password || (*pp_password)[0] == '\0') {
+ /* ... then retrieve it now. */
+ SMBC_call_auth_fn(ctx, context, server, share,
+ pp_workgroup,
+ pp_username,
+ pp_password);
+ if (!*pp_workgroup || !*pp_username || !*pp_password) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ }
+
+ flags = 0;
+
+ creds = SMBC_auth_credentials(NULL,
+ context,
+ *pp_workgroup,
+ *pp_username,
+ *pp_password);
+ if (creds == NULL) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ nt_status = cli_full_connection_creds(&ipc_cli,
+ lp_netbios_name(), server,
+ NULL, 0, "IPC$", "?????",
+ creds,
+ flags);
+ if (! NT_STATUS_IS_OK(nt_status)) {
+ TALLOC_FREE(creds);
+ DEBUG(1,("cli_full_connection failed! (%s)\n",
+ nt_errstr(nt_status)));
+ errno = ENOTSUP;
+ return NULL;
+ }
+ talloc_steal(ipc_cli, creds);
+
+ ipc_srv = SMB_MALLOC_P(SMBCSRV);
+ if (!ipc_srv) {
+ errno = ENOMEM;
+ cli_shutdown(ipc_cli);
+ return NULL;
+ }
+
+ ZERO_STRUCTP(ipc_srv);
+ DLIST_ADD(ipc_srv->cli, ipc_cli);
+
+ nt_status = cli_rpc_pipe_open_noauth(
+ ipc_srv->cli, &ndr_table_lsarpc, &pipe_hnd);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(1, ("cli_nt_session_open fail!\n"));
+ errno = ENOTSUP;
+ cli_shutdown(ipc_srv->cli);
+ free(ipc_srv);
+ return NULL;
+ }
+
+ /*
+ * Some systems don't support
+ * SEC_FLAG_MAXIMUM_ALLOWED, but NT sends 0x2000000
+ * so we might as well do it too.
+ */
+
+ nt_status = rpccli_lsa_open_policy(
+ pipe_hnd,
+ talloc_tos(),
+ True,
+ GENERIC_EXECUTE_ACCESS,
+ &ipc_srv->pol);
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ cli_shutdown(ipc_srv->cli);
+ free(ipc_srv);
+ errno = cli_status_to_errno(nt_status);
+ return NULL;
+ }
+
+ /* now add it to the cache (internal or external) */
+
+ errno = 0; /* let cache function set errno if it likes */
+ if (smbc_getFunctionAddCachedServer(context)(context, ipc_srv,
+ server,
+ "*IPC$",
+ *pp_workgroup,
+ *pp_username)) {
+ DEBUG(3, (" Failed to add server to cache\n"));
+ if (errno == 0) {
+ errno = ENOMEM;
+ }
+ cli_shutdown(ipc_srv->cli);
+ free(ipc_srv);
+ return NULL;
+ }
+
+ DLIST_ADD(context->internal->servers, ipc_srv);
+ }
+
+ return ipc_srv;
+}