#include "../libcli/security/security.h"
#include "auth.h"
#include "lib/param/loadparm.h"
+#include "../lib/util/tevent_ntstatus.h"
-static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
- const char *in_path,
- uint8_t *out_share_type,
- uint32_t *out_share_flags,
- uint32_t *out_capabilities,
- uint32_t *out_maximal_access,
- uint32_t *out_tree_id);
+#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,
+ 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,
+ bool *disconnect);
+
+static void smbd_smb2_request_tcon_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
{
const uint8_t *inbody;
- int i = req->current_idx;
- uint8_t *outhdr;
- DATA_BLOB outbody;
uint16_t in_path_offset;
uint16_t in_path_length;
DATA_BLOB in_path_buffer;
char *in_path_string;
size_t in_path_string_size;
- uint8_t out_share_type = 0;
- uint32_t out_share_flags = 0;
- uint32_t out_capabilities = 0;
- uint32_t out_maximal_access = 0;
- uint32_t out_tree_id = 0;
NTSTATUS status;
bool ok;
+ struct tevent_req *subreq;
status = smbd_smb2_request_verify_sizes(req, 0x09);
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);
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,
return smbd_smb2_request_error(req, NT_STATUS_BAD_NETWORK_NAME);
}
- status = smbd_smb2_tree_connect(req, in_path_string,
- &out_share_type,
- &out_share_flags,
- &out_capabilities,
- &out_maximal_access,
- &out_tree_id);
+ subreq = smbd_smb2_tree_connect_send(req,
+ req->sconn->ev_ctx,
+ req,
+ 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);
+}
+
+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);
+ uint8_t *outhdr;
+ DATA_BLOB outbody;
+ uint8_t out_share_type = 0;
+ uint32_t out_share_flags = 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;
+
+ status = smbd_smb2_tree_connect_recv(subreq,
+ &out_share_type,
+ &out_share_flags,
+ &out_capabilities,
+ &out_maximal_access,
+ &out_tree_id,
+ &disconnect);
+ TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
- return smbd_smb2_request_error(req, 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->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) {
- return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(req->xconn,
+ nt_errstr(error));
+ return;
+ }
+ return;
}
SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
SIVAL(outbody.data, 0x0C,
out_maximal_access); /* maximal access */
- return smbd_smb2_request_done(req, outbody, NULL);
-}
-
-static int smbd_smb2_tcon_destructor(struct smbd_smb2_tcon *tcon)
-{
- if (tcon->session == NULL) {
- return 0;
+ error = smbd_smb2_request_done(req, outbody, NULL);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(req->xconn,
+ nt_errstr(error));
+ return;
}
-
- idr_remove(tcon->session->tcons.idtree, tcon->tid);
- DLIST_REMOVE(tcon->session->tcons.list, tcon);
- SMB_ASSERT(tcon->session->sconn->num_tcons_open > 0);
- tcon->session->sconn->num_tcons_open--;
-
- if (tcon->compat_conn) {
- set_current_service(tcon->compat_conn, 0, true);
- close_cnum(tcon->compat_conn, tcon->session->vuid);
- }
-
- tcon->compat_conn = NULL;
- tcon->tid = 0;
- tcon->session = NULL;
-
- return 0;
}
static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
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 smbXsrv_connection *conn = req->xconn;
const char *share = in_path;
char *service = NULL;
int snum = -1;
- struct smbd_smb2_tcon *tcon;
+ struct smbXsrv_tcon *tcon;
+ NTTIME now = timeval_to_nttime(&req->request_time);
connection_struct *compat_conn = NULL;
- user_struct *compat_vuser = req->session->compat_vuser;
- int id;
+ 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;
+
+ *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(compat_vuser->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)) {
snum = compat_vuser->homes_snum;
} else if ((compat_vuser->homes_snum != -1)
&& strequal(service,
- lp_servicename(compat_vuser->homes_snum))) {
+ lp_servicename(talloc_tos(), compat_vuser->homes_snum))) {
snum = compat_vuser->homes_snum;
} else {
snum = find_service(talloc_tos(), service, &service);
return NT_STATUS_BAD_NETWORK_NAME;
}
- /* create a new tcon as child of the session */
- tcon = talloc_zero(req->session, struct smbd_smb2_tcon);
- if (tcon == NULL) {
- return NT_STATUS_NO_MEMORY;
+ /* Handle non-DFS clients attempting connections to msdfs proxy */
+ if (lp_host_msdfs()) {
+ char *proxy = lp_msdfs_proxy(talloc_tos(), 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);
}
- id = idr_get_new_random(req->session->tcons.idtree,
- tcon,
- req->session->tcons.limit);
- if (id == -1) {
- TALLOC_FREE(tcon);
- return NT_STATUS_INSUFFICIENT_RESOURCES;
+
+ if ((lp_smb_encrypt(snum) >= SMB_SIGNING_DESIRED) &&
+ (conn->smb2.server.cipher != 0))
+ {
+ encryption_desired = true;
+ }
+
+ if (lp_smb_encrypt(snum) == SMB_SIGNING_REQUIRED) {
+ encryption_desired = true;
+ encryption_required = true;
}
- tcon->tid = id;
- tcon->snum = snum;
- DLIST_ADD_END(req->session->tcons.list, tcon,
- struct smbd_smb2_tcon *);
- tcon->session = req->session;
- tcon->session->sconn->num_tcons_open++;
- talloc_set_destructor(tcon, smbd_smb2_tcon_destructor);
+ 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;
+ }
+ }
- compat_conn = make_connection_smb2(req->sconn,
- tcon,
- req->session->compat_vuser,
- data_blob_null, "???",
+ /* create a new tcon as child of the session */
+ status = smb2srv_tcon_create(req->session, now, &tcon);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if (encryption_desired) {
+ tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
+ }
+ if (encryption_required) {
+ tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
+ }
+
+ compat_conn = make_connection_smb2(req,
+ tcon, snum,
+ req->session->compat,
+ "???",
&status);
if (compat_conn == NULL) {
TALLOC_FREE(tcon);
return status;
}
- tcon->compat_conn = talloc_move(tcon, &compat_conn);
- if (IS_PRINT(tcon->compat_conn)) {
+ 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->global->session_global_id =
+ req->session->global->session_global_id;
+
+ 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_conn)) {
+ } else if (IS_IPC(tcon->compat)) {
*out_share_type = SMB2_SHARE_TYPE_PIPE;
} else {
*out_share_type = SMB2_SHARE_TYPE_DISK;
*out_share_flags = 0;
- if (lp_msdfs_root(SNUM(tcon->compat_conn)) && lp_host_msdfs()) {
+ if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
*out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
*out_capabilities = SMB2_SHARE_CAP_DFS;
} else {
*out_capabilities = 0;
}
- switch(lp_csc_policy(SNUM(tcon->compat_conn))) {
+ switch(lp_csc_policy(SNUM(tcon->compat))) {
case CSC_POLICY_MANUAL:
break;
case CSC_POLICY_DOCUMENTS:
break;
}
- if (lp_hideunreadable(SNUM(tcon->compat_conn)) ||
- lp_hideunwriteable_files(SNUM(tcon->compat_conn))) {
+ if (lp_hide_unreadable(SNUM(tcon->compat)) ||
+ lp_hide_unwriteable_files(SNUM(tcon->compat))) {
*out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
}
- *out_maximal_access = tcon->compat_conn->share_access;
+ if (encryption_desired) {
+ *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
+ }
+
+ *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;
+}
+
+struct smbd_smb2_tree_connect_state {
+ const char *in_path;
+ uint8_t out_share_type;
+ uint32_t out_share_flags;
+ 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,
+ const char *in_path)
+{
+ struct tevent_req *req;
+ struct smbd_smb2_tree_connect_state *state;
+ NTSTATUS status;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct smbd_smb2_tree_connect_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->in_path = in_path;
+
+ status = smbd_smb2_tree_connect(smb2req,
+ state->in_path,
+ &state->out_share_type,
+ &state->out_share_flags,
+ &state->out_capabilities,
+ &state->out_maximal_access,
+ &state->out_tree_id,
+ &state->disconnect);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
+
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+}
+
+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,
+ bool *disconnect)
+{
+ struct smbd_smb2_tree_connect_state *state =
+ tevent_req_data(req,
+ struct smbd_smb2_tree_connect_state);
+ NTSTATUS status;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
+ return status;
+ }
+
+ *out_share_type = state->out_share_type;
+ *out_share_flags = state->out_share_flags;
+ *out_capabilities = state->out_capabilities;
+ *out_maximal_access = state->out_maximal_access;
+ *out_tree_id = state->out_tree_id;
+ *disconnect = state->disconnect;
- *out_tree_id = tcon->tid;
+ 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
- * and delete all file handles.
+ * Wait a long time before going async on this to allow
+ * requests we're waiting on to finish. Set timeout to 10 secs.
*/
- TALLOC_FREE(req->tcon);
+ return smbd_smb2_request_pending_queue(req, subreq, 10000000);
+}
+
+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)) {
+ error = smbd_smb2_request_error(smb2req, status);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(smb2req->xconn,
+ nt_errstr(error));
+ return;
+ }
+ return;
+ }
- 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;
+ }
+
+ /*
+ * Never cancel anything in a compound
+ * request. Way too hard to deal with
+ * the result.
+ */
+ if (!preq->compound_related && 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);
}