#include "lib/param/loadparm.h"
#include "../lib/util/tevent_ntstatus.h"
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_SMB2
+
static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
+ uint16_t in_flags,
const char *in_path);
static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
uint8_t *out_share_type,
uint32_t *out_share_flags,
uint32_t *out_capabilities,
uint32_t *out_maximal_access,
- uint32_t *out_tree_id);
+ uint32_t *out_tree_id,
+ bool *disconnect);
static void smbd_smb2_request_tcon_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
{
+ struct smbXsrv_connection *xconn = req->xconn;
const uint8_t *inbody;
- int i = req->current_idx;
+ uint16_t in_flags;
uint16_t in_path_offset;
uint16_t in_path_length;
DATA_BLOB in_path_buffer;
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
- inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+ inbody = SMBD_SMB2_IN_BODY_PTR(req);
+ if (xconn->protocol >= PROTOCOL_SMB3_11) {
+ in_flags = SVAL(inbody, 0x02);
+ } else {
+ in_flags = 0;
+ }
in_path_offset = SVAL(inbody, 0x04);
in_path_length = SVAL(inbody, 0x06);
- if (in_path_offset != (SMB2_HDR_BODY + req->in.vector[i+1].iov_len)) {
+ if (in_path_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
- if (in_path_length > req->in.vector[i+2].iov_len) {
+ if (in_path_length > SMBD_SMB2_IN_DYN_LEN(req)) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
- in_path_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
+ in_path_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
in_path_buffer.length = in_path_length;
ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
subreq = smbd_smb2_tree_connect_send(req,
req->sconn->ev_ctx,
req,
+ in_flags,
in_path_string);
if (subreq == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
tevent_req_set_callback(subreq, smbd_smb2_request_tcon_done, req);
- return smbd_smb2_request_pending_queue(req, subreq, 500);
+ /*
+ * Avoid sending a STATUS_PENDING message, it's very likely
+ * the client won't expect that.
+ */
+ return smbd_smb2_request_pending_queue(req, subreq, 0);
}
static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
struct smbd_smb2_request *req =
tevent_req_callback_data(subreq,
struct smbd_smb2_request);
- int i = req->current_idx;
uint8_t *outhdr;
DATA_BLOB outbody;
uint8_t out_share_type = 0;
uint32_t out_capabilities = 0;
uint32_t out_maximal_access = 0;
uint32_t out_tree_id = 0;
+ bool disconnect = false;
NTSTATUS status;
NTSTATUS error;
&out_share_flags,
&out_capabilities,
&out_maximal_access,
- &out_tree_id);
+ &out_tree_id,
+ &disconnect);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
+ if (disconnect) {
+ smbd_server_connection_terminate(req->xconn,
+ nt_errstr(status));
+ return;
+ }
error = smbd_smb2_request_error(req, status);
if (!NT_STATUS_IS_OK(error)) {
- smbd_server_connection_terminate(req->sconn,
+ smbd_server_connection_terminate(req->xconn,
nt_errstr(error));
return;
}
return;
}
- outhdr = (uint8_t *)req->out.vector[i].iov_base;
+ outhdr = SMBD_SMB2_OUT_HDR_PTR(req);
- outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
+ outbody = smbd_smb2_generate_outbody(req, 0x10);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
if (!NT_STATUS_IS_OK(error)) {
- smbd_server_connection_terminate(req->sconn,
+ smbd_server_connection_terminate(req->xconn,
nt_errstr(error));
return;
}
error = smbd_smb2_request_done(req, outbody, NULL);
if (!NT_STATUS_IS_OK(error)) {
- smbd_server_connection_terminate(req->sconn,
+ smbd_server_connection_terminate(req->xconn,
nt_errstr(error));
return;
}
uint32_t *out_share_flags,
uint32_t *out_capabilities,
uint32_t *out_maximal_access,
- uint32_t *out_tree_id)
+ uint32_t *out_tree_id,
+ bool *disconnect)
{
+ const struct loadparm_substitution *lp_sub =
+ loadparm_s3_global_substitution();
+ struct smbXsrv_connection *conn = req->xconn;
+ struct smbXsrv_session *session = req->session;
+ struct auth_session_info *session_info =
+ session->global->auth_session_info;
const char *share = in_path;
char *service = NULL;
int snum = -1;
struct smbXsrv_tcon *tcon;
NTTIME now = timeval_to_nttime(&req->request_time);
connection_struct *compat_conn = NULL;
- struct user_struct *compat_vuser = req->session->compat;
NTSTATUS status;
+ bool encryption_desired = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED;
+ bool encryption_required = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED;
+ bool guest_session = false;
+ bool require_signed_tcon = false;
+ uint32_t session_global_id;
+ char *share_name = NULL;
+ uint8_t encryption_flags = 0;
+
+ *disconnect = false;
if (strncmp(share, "\\\\", 2) == 0) {
const char *p = strchr(share+2, '\\');
DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
in_path, share));
+ if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
+ guest_session = true;
+ }
+
+ if (conn->protocol >= PROTOCOL_SMB3_11 && !guest_session) {
+ require_signed_tcon = true;
+ }
+
+ if (require_signed_tcon && !req->do_encryption && !req->do_signing) {
+ DEBUG(1, ("smbd_smb2_tree_connect: reject request to share "
+ "[%s] as '%s\\%s' without encryption or signing. "
+ "Disconnecting.\n",
+ share,
+ req->session->global->auth_session_info->info->domain_name,
+ req->session->global->auth_session_info->info->account_name));
+ *disconnect = true;
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
service = talloc_strdup(talloc_tos(), share);
if(!service) {
return NT_STATUS_NO_MEMORY;
}
- strlower_m(service);
+ if (!strlower_m(service)) {
+ DEBUG(2, ("strlower_m %s failed\n", service));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
/* TODO: do more things... */
if (strequal(service,HOMES_NAME)) {
- if (compat_vuser->homes_snum == -1) {
+ if (session->homes_snum == -1) {
DEBUG(2, ("[homes] share not available for "
"user %s because it was not found "
"or created at session setup "
"time\n",
- compat_vuser->session_info->unix_info->unix_name));
+ session_info->unix_info->unix_name));
return NT_STATUS_BAD_NETWORK_NAME;
}
- snum = compat_vuser->homes_snum;
- } else if ((compat_vuser->homes_snum != -1)
+ snum = session->homes_snum;
+ } else if ((session->homes_snum != -1)
&& strequal(service,
- lp_servicename(talloc_tos(), compat_vuser->homes_snum))) {
- snum = compat_vuser->homes_snum;
+ lp_servicename(talloc_tos(), lp_sub, session->homes_snum))) {
+ snum = session->homes_snum;
} else {
snum = find_service(talloc_tos(), service, &service);
if (!service) {
return NT_STATUS_BAD_NETWORK_NAME;
}
+ /* Handle non-DFS clients attempting connections to msdfs proxy */
+ if (lp_host_msdfs()) {
+ char *proxy = lp_msdfs_proxy(talloc_tos(), lp_sub, snum);
+
+ if ((proxy != NULL) && (*proxy != '\0')) {
+ DBG_NOTICE("refusing connection to dfs proxy share "
+ "'%s' (pointing to %s)\n",
+ service,
+ proxy);
+ TALLOC_FREE(proxy);
+ return NT_STATUS_BAD_NETWORK_NAME;
+ }
+ TALLOC_FREE(proxy);
+ }
+
+ if ((lp_server_smb_encrypt(snum) >= SMB_ENCRYPTION_DESIRED) &&
+ (conn->smb2.server.cipher != 0))
+ {
+ encryption_desired = true;
+ }
+
+ if (lp_server_smb_encrypt(snum) == SMB_ENCRYPTION_REQUIRED) {
+ encryption_desired = true;
+ encryption_required = true;
+ }
+
+ if (guest_session && encryption_required) {
+ DEBUG(1,("reject guest as encryption is required for service %s\n",
+ service));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (conn->smb2.server.cipher == 0) {
+ if (encryption_required) {
+ DEBUG(1,("reject tcon with dialect[0x%04X] "
+ "as encryption is required for service %s\n",
+ conn->smb2.server.dialect, service));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ }
+
+ if (encryption_desired) {
+ encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
+ }
+ if (encryption_required) {
+ encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
+ }
+
+ session_global_id = req->session->global->session_global_id;
+ share_name = lp_servicename(talloc_tos(), lp_sub, snum);
+ if (share_name == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if ((lp_max_connections(snum) > 0)
+ && (count_current_connections(lp_const_servicename(snum), true) >=
+ lp_max_connections(snum))) {
+
+ DBG_WARNING("Max connections (%d) exceeded for [%s][%s]\n",
+ lp_max_connections(snum),
+ lp_const_servicename(snum), share_name);
+ TALLOC_FREE(share_name);
+ return NT_STATUS_INSUFFICIENT_RESOURCES;
+ }
+
/* create a new tcon as child of the session */
- status = smb2srv_tcon_create(req->session, now, &tcon);
+ status = smb2srv_tcon_create(req->session,
+ session_global_id,
+ encryption_flags,
+ share_name,
+ now, &tcon);
+ TALLOC_FREE(share_name);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- compat_conn = make_connection_smb2(req->sconn,
+ compat_conn = make_connection_smb2(req,
tcon, snum,
- req->session->compat,
"???",
&status);
if (compat_conn == NULL) {
return status;
}
- tcon->global->share_name = lp_servicename(tcon->global,
- SNUM(compat_conn));
- if (tcon->global->share_name == NULL) {
- conn_free(compat_conn);
- TALLOC_FREE(tcon);
- return NT_STATUS_NO_MEMORY;
- }
-
tcon->compat = talloc_move(tcon, &compat_conn);
tcon->status = NT_STATUS_OK;
- status = smbXsrv_tcon_update(tcon);
- if (!NT_STATUS_IS_OK(status)) {
- TALLOC_FREE(tcon);
- return status;
- }
-
if (IS_PRINT(tcon->compat)) {
*out_share_type = SMB2_SHARE_TYPE_PRINT;
} else if (IS_IPC(tcon->compat)) {
break;
}
- if (lp_hideunreadable(SNUM(tcon->compat)) ||
- lp_hideunwriteable_files(SNUM(tcon->compat))) {
+ if (lp_hide_unreadable(SNUM(tcon->compat)) ||
+ lp_hide_unwriteable_files(SNUM(tcon->compat))) {
*out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
}
+ if (encryption_desired) {
+ *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
+ }
+
+ /*
+ * For disk shares we can change the client
+ * behavior on a cluster...
+ */
+ if (conn->protocol >= PROTOCOL_SMB3_00 &&
+ *out_share_type == SMB2_SHARE_TYPE_DISK)
+ {
+ bool persistent = false; /* persistent handles not implemented yet */
+ bool cluster = lp_clustering();
+ bool scaleout = cluster;
+ bool witness = cluster && !lp_rpc_start_on_demand_helpers();
+ bool asymmetric = false; /* shares are symmetric by default */
+ bool announce;
+
+ /*
+ * In a ctdb cluster shares are continuously available,
+ * but windows clients mix this with the global persistent
+ * handles support.
+ *
+ * Persistent handles are requested if
+ * SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY is present
+ * even without SMB2_CAP_PERSISTENT_HANDLES.
+ *
+ * And SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY is
+ * required for SMB2_SHARE_CAP_CLUSTER to have
+ * an effect.
+ *
+ * So we better don't announce this by default
+ * until we support persistent handles.
+ */
+ announce = lp_parm_bool(SNUM(tcon->compat),
+ "smb3 share cap",
+ "CONTINUOUS AVAILABILITY",
+ persistent);
+ if (announce) {
+ *out_capabilities |= SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
+ }
+
+ /*
+ * ctdb clusters are always scale out...
+ */
+ announce = lp_parm_bool(SNUM(tcon->compat),
+ "smb3 share cap",
+ "SCALE OUT",
+ scaleout);
+ if (announce) {
+ *out_capabilities |= SMB2_SHARE_CAP_SCALEOUT;
+ }
+
+ /*
+ * We support the witness service when ctdb is active
+ */
+ announce = lp_parm_bool(SNUM(tcon->compat),
+ "smb3 share cap",
+ "CLUSTER",
+ witness);
+ if (announce) {
+ *out_capabilities |= SMB2_SHARE_CAP_CLUSTER;
+ }
+
+ /*
+ * Shares in a ctdb cluster are symmetric by design.
+ *
+ * But it might be useful to let the client use
+ * an isolated transport and witness registration for the
+ * specific share.
+ */
+ if (conn->protocol >= PROTOCOL_SMB3_02) {
+ announce = lp_parm_bool(SNUM(tcon->compat),
+ "smb3 share cap",
+ "ASYMMETRIC",
+ asymmetric);
+ }
+ if (announce) {
+ *out_capabilities |= SMB2_SHARE_CAP_ASYMMETRIC;
+ }
+ }
+
*out_maximal_access = tcon->compat->share_access;
*out_tree_id = tcon->global->tcon_wire_id;
+ req->last_tid = tcon->global->tcon_wire_id;
+
return NT_STATUS_OK;
}
uint32_t out_capabilities;
uint32_t out_maximal_access;
uint32_t out_tree_id;
+ bool disconnect;
};
static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
+ uint16_t in_flags,
const char *in_path)
{
struct tevent_req *req;
&state->out_share_flags,
&state->out_capabilities,
&state->out_maximal_access,
- &state->out_tree_id);
+ &state->out_tree_id,
+ &state->disconnect);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
uint32_t *out_share_flags,
uint32_t *out_capabilities,
uint32_t *out_maximal_access,
- uint32_t *out_tree_id)
+ uint32_t *out_tree_id,
+ bool *disconnect)
{
struct smbd_smb2_tree_connect_state *state =
tevent_req_data(req,
*out_capabilities = state->out_capabilities;
*out_maximal_access = state->out_maximal_access;
*out_tree_id = state->out_tree_id;
+ *disconnect = state->disconnect;
tevent_req_received(req);
return NT_STATUS_OK;
}
+static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbd_smb2_request *smb2req);
+static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
+static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
+
NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
{
NTSTATUS status;
- DATA_BLOB outbody;
+ struct tevent_req *subreq = NULL;
status = smbd_smb2_request_verify_sizes(req, 0x04);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
+ subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
+ if (subreq == NULL) {
+ return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ }
+ tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
+
/*
- * TODO: cancel all outstanding requests on the tcon
+ * Avoid sending a STATUS_PENDING message, it's very likely
+ * the client won't expect that.
*/
- status = smbXsrv_tcon_disconnect(req->tcon, req->tcon->compat->vuid);
+ return smbd_smb2_request_pending_queue(req, subreq, 0);
+}
+
+static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
+{
+ struct smbd_smb2_request *smb2req =
+ tevent_req_callback_data(subreq,
+ struct smbd_smb2_request);
+ DATA_BLOB outbody;
+ NTSTATUS status;
+ NTSTATUS error;
+
+ status = smbd_smb2_tdis_recv(subreq);
+ TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("smbd_smb2_request_process_tdis: "
- "smbXsrv_tcon_disconnect() failed: %s\n",
- nt_errstr(status)));
- /*
- * If we hit this case, there is something completely
- * wrong, so we better disconnect the transport connection.
- */
- return status;
+ error = smbd_smb2_request_error(smb2req, status);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(smb2req->xconn,
+ nt_errstr(error));
+ return;
+ }
+ return;
}
- TALLOC_FREE(req->tcon);
-
- outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
+ outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
if (outbody.data == NULL) {
- return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(smb2req->xconn,
+ nt_errstr(error));
+ return;
+ }
+ return;
}
SSVAL(outbody.data, 0x00, 0x04); /* struct size */
SSVAL(outbody.data, 0x02, 0); /* reserved */
- return smbd_smb2_request_done(req, outbody, NULL);
+ error = smbd_smb2_request_done(smb2req, outbody, NULL);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(smb2req->xconn,
+ nt_errstr(error));
+ return;
+ }
+}
+
+struct smbd_smb2_tdis_state {
+ struct smbd_smb2_request *smb2req;
+ struct tevent_queue *wait_queue;
+};
+
+static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
+
+static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbd_smb2_request *smb2req)
+{
+ struct tevent_req *req;
+ struct smbd_smb2_tdis_state *state;
+ struct tevent_req *subreq;
+ struct smbXsrv_connection *xconn = NULL;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct smbd_smb2_tdis_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->smb2req = smb2req;
+
+ state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
+ if (tevent_req_nomem(state->wait_queue, req)) {
+ return tevent_req_post(req, ev);
+ }
+
+ /*
+ * Make sure that no new request will be able to use this tcon.
+ */
+ smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
+
+ xconn = smb2req->xconn->client->connections;
+ for (; xconn != NULL; xconn = xconn->next) {
+ struct smbd_smb2_request *preq;
+
+ for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
+ if (preq == smb2req) {
+ /* Can't cancel current request. */
+ continue;
+ }
+ if (preq->tcon != smb2req->tcon) {
+ /* Request on different tcon. */
+ continue;
+ }
+
+ if (preq->subreq != NULL) {
+ tevent_req_cancel(preq->subreq);
+ }
+
+ /*
+ * Now wait until the request is finished.
+ *
+ * We don't set a callback, as we just want to block the
+ * wait queue and the talloc_free() of the request will
+ * remove the item from the wait queue.
+ */
+ subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ }
+ }
+
+ /*
+ * Now we add our own waiter to the end of the queue,
+ * this way we get notified when all pending requests are finished
+ * and send to the socket.
+ */
+ subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
+
+ return req;
+}
+
+static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct smbd_smb2_tdis_state *state = tevent_req_data(
+ req, struct smbd_smb2_tdis_state);
+ NTSTATUS status;
+
+ tevent_queue_wait_recv(subreq);
+ TALLOC_FREE(subreq);
+
+ /*
+ * As we've been awoken, we may have changed
+ * uid in the meantime. Ensure we're still
+ * root (SMB2_OP_TDIS has .as_root = true).
+ */
+ change_to_root_user();
+
+ status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
+ state->smb2req->tcon->compat->vuid);
+ if (tevent_req_nterror(req, status)) {
+ return;
+ }
+
+ /* We did tear down the tcon. */
+ TALLOC_FREE(state->smb2req->tcon);
+ tevent_req_done(req);
+}
+
+static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
+{
+ return tevent_req_simple_recv_ntstatus(req);
}
git.samba.org / samba.git / blobdiff