diff options
Diffstat (limited to 'source3/smbd/smbXsrv_session.c')
| -rw-r--r-- | source3/smbd/smbXsrv_session.c | 2527 |
1 files changed, 2527 insertions, 0 deletions
diff --git a/source3/smbd/smbXsrv_session.c b/source3/smbd/smbXsrv_session.c new file mode 100644 index 0000000..a88b7c1 --- /dev/null +++ b/source3/smbd/smbXsrv_session.c @@ -0,0 +1,2527 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Stefan Metzmacher 2011-2012 + Copyright (C) Michael Adam 2012 + + 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 "system/filesys.h" +#include <tevent.h> +#include "lib/util/server_id.h" +#include "smbd/smbd.h" +#include "smbd/globals.h" +#include "dbwrap/dbwrap.h" +#include "dbwrap/dbwrap_rbt.h" +#include "dbwrap/dbwrap_open.h" +#include "dbwrap/dbwrap_watch.h" +#include "session.h" +#include "auth.h" +#include "auth/gensec/gensec.h" +#include "../lib/tsocket/tsocket.h" +#include "../libcli/security/security.h" +#include "messages.h" +#include "lib/util/util_tdb.h" +#include "librpc/gen_ndr/ndr_smbXsrv.h" +#include "serverid.h" +#include "lib/util/tevent_ntstatus.h" +#include "lib/global_contexts.h" +#include "source3/include/util_tdb.h" + +struct smbXsrv_session_table { + struct { + struct db_context *db_ctx; + uint32_t lowest_id; + uint32_t highest_id; + uint32_t max_sessions; + uint32_t num_sessions; + } local; + struct { + struct db_context *db_ctx; + } global; +}; + +static struct db_context *smbXsrv_session_global_db_ctx = NULL; + +NTSTATUS smbXsrv_session_global_init(struct messaging_context *msg_ctx) +{ + char *global_path = NULL; + struct db_context *backend = NULL; + struct db_context *db_ctx = NULL; + + if (smbXsrv_session_global_db_ctx != NULL) { + return NT_STATUS_OK; + } + + /* + * This contains secret information like session keys! + */ + global_path = lock_path(talloc_tos(), "smbXsrv_session_global.tdb"); + if (global_path == NULL) { + return NT_STATUS_NO_MEMORY; + } + + backend = db_open(NULL, global_path, + SMBD_VOLATILE_TDB_HASH_SIZE, + SMBD_VOLATILE_TDB_FLAGS, + O_RDWR | O_CREAT, 0600, + DBWRAP_LOCK_ORDER_1, + DBWRAP_FLAG_NONE); + TALLOC_FREE(global_path); + if (backend == NULL) { + NTSTATUS status; + + status = map_nt_error_from_unix_common(errno); + + return status; + } + + db_ctx = db_open_watched(NULL, &backend, global_messaging_context()); + if (db_ctx == NULL) { + TALLOC_FREE(backend); + return NT_STATUS_NO_MEMORY; + } + + smbXsrv_session_global_db_ctx = db_ctx; + + return NT_STATUS_OK; +} + +/* + * NOTE: + * We need to store the keys in big endian so that dbwrap_rbt's memcmp + * has the same result as integer comparison between the uint32_t + * values. + * + * TODO: implement string based key + */ + +#define SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE sizeof(uint32_t) + +static TDB_DATA smbXsrv_session_global_id_to_key(uint32_t id, + uint8_t *key_buf) +{ + TDB_DATA key; + + RSIVAL(key_buf, 0, id); + + key = make_tdb_data(key_buf, SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE); + + return key; +} + +#if 0 +static NTSTATUS smbXsrv_session_global_key_to_id(TDB_DATA key, uint32_t *id) +{ + if (id == NULL) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (key.dsize != SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE) { + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + *id = RIVAL(key.dptr, 0); + + return NT_STATUS_OK; +} +#endif + +#define SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE sizeof(uint32_t) + +static TDB_DATA smbXsrv_session_local_id_to_key(uint32_t id, + uint8_t *key_buf) +{ + TDB_DATA key; + + RSIVAL(key_buf, 0, id); + + key = make_tdb_data(key_buf, SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE); + + return key; +} + +static NTSTATUS smbXsrv_session_local_key_to_id(TDB_DATA key, uint32_t *id) +{ + if (id == NULL) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (key.dsize != SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE) { + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + *id = RIVAL(key.dptr, 0); + + return NT_STATUS_OK; +} + +static struct db_record *smbXsrv_session_global_fetch_locked( + struct db_context *db, + uint32_t id, + TALLOC_CTX *mem_ctx) +{ + TDB_DATA key; + uint8_t key_buf[SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE]; + struct db_record *rec = NULL; + + key = smbXsrv_session_global_id_to_key(id, key_buf); + + rec = dbwrap_fetch_locked(db, mem_ctx, key); + + if (rec == NULL) { + DBG_DEBUG("Failed to lock global id 0x%08x, key '%s'\n", id, + tdb_data_dbg(key)); + } + + return rec; +} + +static struct db_record *smbXsrv_session_local_fetch_locked( + struct db_context *db, + uint32_t id, + TALLOC_CTX *mem_ctx) +{ + TDB_DATA key; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + struct db_record *rec = NULL; + + key = smbXsrv_session_local_id_to_key(id, key_buf); + + rec = dbwrap_fetch_locked(db, mem_ctx, key); + + if (rec == NULL) { + DBG_DEBUG("Failed to lock local id 0x%08x, key '%s'\n", id, + tdb_data_dbg(key)); + } + + return rec; +} + +static void smbXsrv_session_close_loop(struct tevent_req *subreq); + +static NTSTATUS smbXsrv_session_table_init(struct smbXsrv_connection *conn, + uint32_t lowest_id, + uint32_t highest_id, + uint32_t max_sessions) +{ + struct smbXsrv_client *client = conn->client; + struct smbXsrv_session_table *table; + NTSTATUS status; + struct tevent_req *subreq; + uint64_t max_range; + + if (lowest_id > highest_id) { + return NT_STATUS_INTERNAL_ERROR; + } + + max_range = highest_id; + max_range -= lowest_id; + max_range += 1; + + if (max_sessions > max_range) { + return NT_STATUS_INTERNAL_ERROR; + } + + table = talloc_zero(client, struct smbXsrv_session_table); + if (table == NULL) { + return NT_STATUS_NO_MEMORY; + } + + table->local.db_ctx = db_open_rbt(table); + if (table->local.db_ctx == NULL) { + TALLOC_FREE(table); + return NT_STATUS_NO_MEMORY; + } + table->local.lowest_id = lowest_id; + table->local.highest_id = highest_id; + table->local.max_sessions = max_sessions; + + status = smbXsrv_session_global_init(client->msg_ctx); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(table); + return status; + } + + table->global.db_ctx = smbXsrv_session_global_db_ctx; + + subreq = messaging_read_send(table, + client->raw_ev_ctx, + client->msg_ctx, + MSG_SMBXSRV_SESSION_CLOSE); + if (subreq == NULL) { + TALLOC_FREE(table); + return NT_STATUS_NO_MEMORY; + } + tevent_req_set_callback(subreq, smbXsrv_session_close_loop, client); + + client->session_table = table; + return NT_STATUS_OK; +} + +static void smbXsrv_session_close_shutdown_done(struct tevent_req *subreq); + +static void smbXsrv_session_close_loop(struct tevent_req *subreq) +{ + struct smbXsrv_client *client = + tevent_req_callback_data(subreq, + struct smbXsrv_client); + struct smbXsrv_session_table *table = client->session_table; + int ret; + struct messaging_rec *rec = NULL; + struct smbXsrv_session_closeB close_blob; + enum ndr_err_code ndr_err; + struct smbXsrv_session_close0 *close_info0 = NULL; + struct smbXsrv_session *session = NULL; + NTSTATUS status; + struct timeval tv = timeval_current(); + NTTIME now = timeval_to_nttime(&tv); + + ret = messaging_read_recv(subreq, talloc_tos(), &rec); + TALLOC_FREE(subreq); + if (ret != 0) { + goto next; + } + + ndr_err = ndr_pull_struct_blob(&rec->buf, rec, &close_blob, + (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_session_closeB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + status = ndr_map_error2ntstatus(ndr_err); + DBG_WARNING("smbXsrv_session_close_loop: " + "ndr_pull_struct_blob - %s\n", + nt_errstr(status)); + goto next; + } + + DBG_DEBUG("smbXsrv_session_close_loop: MSG_SMBXSRV_SESSION_CLOSE\n"); + if (DEBUGLVL(DBGLVL_DEBUG)) { + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + } + + if (close_blob.version != SMBXSRV_VERSION_0) { + DBG_ERR("smbXsrv_session_close_loop: " + "ignore invalid version %u\n", close_blob.version); + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + goto next; + } + + close_info0 = close_blob.info.info0; + if (close_info0 == NULL) { + DBG_ERR("smbXsrv_session_close_loop: " + "ignore NULL info %u\n", close_blob.version); + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + goto next; + } + + status = smb2srv_session_lookup_client(client, + close_info0->old_session_wire_id, + now, &session); + if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) { + DBG_INFO("smbXsrv_session_close_loop: " + "old_session_wire_id %llu not found\n", + (unsigned long long)close_info0->old_session_wire_id); + if (DEBUGLVL(DBGLVL_INFO)) { + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + } + goto next; + } + if (!NT_STATUS_IS_OK(status) && + !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) && + !NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) { + DBG_WARNING("smbXsrv_session_close_loop: " + "old_session_wire_id %llu - %s\n", + (unsigned long long)close_info0->old_session_wire_id, + nt_errstr(status)); + if (DEBUGLVL(DBGLVL_WARNING)) { + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + } + goto next; + } + + if (session->global->session_global_id != close_info0->old_session_global_id) { + DBG_WARNING("smbXsrv_session_close_loop: " + "old_session_wire_id %llu - global %u != %u\n", + (unsigned long long)close_info0->old_session_wire_id, + session->global->session_global_id, + close_info0->old_session_global_id); + if (DEBUGLVL(DBGLVL_WARNING)) { + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + } + goto next; + } + + if (session->global->creation_time != close_info0->old_creation_time) { + DBG_WARNING("smbXsrv_session_close_loop: " + "old_session_wire_id %llu - " + "creation %s (%llu) != %s (%llu)\n", + (unsigned long long)close_info0->old_session_wire_id, + nt_time_string(rec, session->global->creation_time), + (unsigned long long)session->global->creation_time, + nt_time_string(rec, close_info0->old_creation_time), + (unsigned long long)close_info0->old_creation_time); + if (DEBUGLVL(DBGLVL_WARNING)) { + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + } + goto next; + } + + subreq = smb2srv_session_shutdown_send(session, client->raw_ev_ctx, + session, NULL); + if (subreq == NULL) { + status = NT_STATUS_NO_MEMORY; + DBG_ERR("smbXsrv_session_close_loop: " + "smb2srv_session_shutdown_send(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + if (DEBUGLVL(DBGLVL_WARNING)) { + NDR_PRINT_DEBUG(smbXsrv_session_closeB, &close_blob); + } + goto next; + } + tevent_req_set_callback(subreq, + smbXsrv_session_close_shutdown_done, + session); + +next: + TALLOC_FREE(rec); + + subreq = messaging_read_send(table, + client->raw_ev_ctx, + client->msg_ctx, + MSG_SMBXSRV_SESSION_CLOSE); + if (subreq == NULL) { + const char *r; + r = "messaging_read_send(MSG_SMBXSRV_SESSION_CLOSE) failed"; + exit_server_cleanly(r); + return; + } + tevent_req_set_callback(subreq, smbXsrv_session_close_loop, client); +} + +static void smbXsrv_session_close_shutdown_done(struct tevent_req *subreq) +{ + struct smbXsrv_session *session = + tevent_req_callback_data(subreq, + struct smbXsrv_session); + NTSTATUS status; + + status = smb2srv_session_shutdown_recv(subreq); + TALLOC_FREE(subreq); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_close_loop: " + "smb2srv_session_shutdown_recv(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + } + + status = smbXsrv_session_logoff(session); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_close_loop: " + "smbXsrv_session_logoff(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + } + + TALLOC_FREE(session); +} + +struct smb1srv_session_local_allocate_state { + const uint32_t lowest_id; + const uint32_t highest_id; + uint32_t last_id; + uint32_t useable_id; + NTSTATUS status; +}; + +static int smb1srv_session_local_allocate_traverse(struct db_record *rec, + void *private_data) +{ + struct smb1srv_session_local_allocate_state *state = + (struct smb1srv_session_local_allocate_state *)private_data; + TDB_DATA key = dbwrap_record_get_key(rec); + uint32_t id = 0; + NTSTATUS status; + + status = smbXsrv_session_local_key_to_id(key, &id); + if (!NT_STATUS_IS_OK(status)) { + state->status = status; + return -1; + } + + if (id <= state->last_id) { + state->status = NT_STATUS_INTERNAL_DB_CORRUPTION; + return -1; + } + state->last_id = id; + + if (id > state->useable_id) { + state->status = NT_STATUS_OK; + return -1; + } + + if (state->useable_id == state->highest_id) { + state->status = NT_STATUS_INSUFFICIENT_RESOURCES; + return -1; + } + + state->useable_id +=1; + return 0; +} + +static NTSTATUS smb1srv_session_local_allocate_id(struct db_context *db, + uint32_t lowest_id, + uint32_t highest_id, + TALLOC_CTX *mem_ctx, + struct db_record **_rec, + uint32_t *_id) +{ + struct smb1srv_session_local_allocate_state state = { + .lowest_id = lowest_id, + .highest_id = highest_id, + .last_id = 0, + .useable_id = lowest_id, + .status = NT_STATUS_INTERNAL_ERROR, + }; + uint32_t i; + uint32_t range; + NTSTATUS status; + int count = 0; + + *_rec = NULL; + *_id = 0; + + if (lowest_id > highest_id) { + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + /* + * first we try randomly + */ + range = (highest_id - lowest_id) + 1; + + for (i = 0; i < (range / 2); i++) { + uint32_t id; + TDB_DATA val; + struct db_record *rec = NULL; + + id = generate_random() % range; + id += lowest_id; + + if (id < lowest_id) { + id = lowest_id; + } + if (id > highest_id) { + id = highest_id; + } + + rec = smbXsrv_session_local_fetch_locked(db, id, mem_ctx); + if (rec == NULL) { + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + val = dbwrap_record_get_value(rec); + if (val.dsize != 0) { + TALLOC_FREE(rec); + continue; + } + + *_rec = rec; + *_id = id; + return NT_STATUS_OK; + } + + /* + * if the range is almost full, + * we traverse the whole table + * (this relies on sorted behavior of dbwrap_rbt) + */ + status = dbwrap_traverse_read(db, smb1srv_session_local_allocate_traverse, + &state, &count); + if (NT_STATUS_IS_OK(status)) { + if (NT_STATUS_IS_OK(state.status)) { + return NT_STATUS_INTERNAL_ERROR; + } + + if (!NT_STATUS_EQUAL(state.status, NT_STATUS_INTERNAL_ERROR)) { + return state.status; + } + + if (state.useable_id <= state.highest_id) { + state.status = NT_STATUS_OK; + } else { + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + } else if (!NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_CORRUPTION)) { + /* + * Here we really expect NT_STATUS_INTERNAL_DB_CORRUPTION! + * + * If we get anything else it is an error, because it + * means we did not manage to find a free slot in + * the db. + */ + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + if (NT_STATUS_IS_OK(state.status)) { + uint32_t id; + TDB_DATA val; + struct db_record *rec = NULL; + + id = state.useable_id; + + rec = smbXsrv_session_local_fetch_locked(db, id, mem_ctx); + if (rec == NULL) { + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + val = dbwrap_record_get_value(rec); + if (val.dsize != 0) { + TALLOC_FREE(rec); + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + *_rec = rec; + *_id = id; + return NT_STATUS_OK; + } + + return state.status; +} + +struct smbXsrv_session_local_fetch_state { + struct smbXsrv_session *session; + NTSTATUS status; +}; + +static void smbXsrv_session_local_fetch_parser(TDB_DATA key, TDB_DATA data, + void *private_data) +{ + struct smbXsrv_session_local_fetch_state *state = + (struct smbXsrv_session_local_fetch_state *)private_data; + void *ptr; + + if (data.dsize != sizeof(ptr)) { + state->status = NT_STATUS_INTERNAL_DB_ERROR; + return; + } + + memcpy(&ptr, data.dptr, data.dsize); + state->session = talloc_get_type_abort(ptr, struct smbXsrv_session); + state->status = NT_STATUS_OK; +} + +static NTSTATUS smbXsrv_session_local_lookup(struct smbXsrv_session_table *table, + /* conn: optional */ + struct smbXsrv_connection *conn, + uint32_t session_local_id, + NTTIME now, + struct smbXsrv_session **_session) +{ + struct smbXsrv_session_local_fetch_state state = { + .session = NULL, + .status = NT_STATUS_INTERNAL_ERROR, + }; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + NTSTATUS status; + + *_session = NULL; + + if (session_local_id == 0) { + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table == NULL) { + /* this might happen before the end of negprot */ + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table->local.db_ctx == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + key = smbXsrv_session_local_id_to_key(session_local_id, key_buf); + + status = dbwrap_parse_record(table->local.db_ctx, key, + smbXsrv_session_local_fetch_parser, + &state); + if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) { + return NT_STATUS_USER_SESSION_DELETED; + } else if (!NT_STATUS_IS_OK(status)) { + return status; + } + if (!NT_STATUS_IS_OK(state.status)) { + return state.status; + } + + if (NT_STATUS_EQUAL(state.session->status, NT_STATUS_USER_SESSION_DELETED)) { + return NT_STATUS_USER_SESSION_DELETED; + } + + /* + * If a connection is specified check if the session is + * valid on the channel. + */ + if (conn != NULL) { + struct smbXsrv_channel_global0 *c = NULL; + + status = smbXsrv_session_find_channel(state.session, conn, &c); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + } + + state.session->idle_time = now; + + if (!NT_STATUS_IS_OK(state.session->status)) { + *_session = state.session; + return state.session->status; + } + + if (now > state.session->global->expiration_time) { + state.session->status = NT_STATUS_NETWORK_SESSION_EXPIRED; + } + + *_session = state.session; + return state.session->status; +} + +static int smbXsrv_session_global_destructor(struct smbXsrv_session_global0 *global) +{ + return 0; +} + +static void smbXsrv_session_global_verify_record(struct db_record *db_rec, + bool *is_free, + bool *was_free, + TALLOC_CTX *mem_ctx, + struct smbXsrv_session_global0 **_g, + uint32_t *pseqnum); + +static NTSTATUS smbXsrv_session_global_allocate(struct db_context *db, + TALLOC_CTX *mem_ctx, + struct smbXsrv_session_global0 **_global) +{ + uint32_t i; + struct smbXsrv_session_global0 *global = NULL; + uint32_t last_free = 0; + const uint32_t min_tries = 3; + + *_global = NULL; + + global = talloc_zero(mem_ctx, struct smbXsrv_session_global0); + if (global == NULL) { + return NT_STATUS_NO_MEMORY; + } + talloc_set_destructor(global, smbXsrv_session_global_destructor); + + /* + * Here we just randomly try the whole 32-bit space + * + * We use just 32-bit, because we want to reuse the + * ID for SRVSVC. + */ + for (i = 0; i < UINT32_MAX; i++) { + bool is_free = false; + bool was_free = false; + uint32_t id; + + if (i >= min_tries && last_free != 0) { + id = last_free; + } else { + id = generate_random(); + } + if (id == 0) { + id++; + } + if (id == UINT32_MAX) { + id--; + } + + global->db_rec = smbXsrv_session_global_fetch_locked(db, id, + mem_ctx); + if (global->db_rec == NULL) { + talloc_free(global); + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + smbXsrv_session_global_verify_record(global->db_rec, + &is_free, + &was_free, + NULL, NULL, NULL); + + if (!is_free) { + TALLOC_FREE(global->db_rec); + continue; + } + + if (!was_free && i < min_tries) { + /* + * The session_id is free now, + * but was not free before. + * + * This happens if a smbd crashed + * and did not cleanup the record. + * + * If this is one of our first tries, + * then we try to find a real free one. + */ + if (last_free == 0) { + last_free = id; + } + TALLOC_FREE(global->db_rec); + continue; + } + + global->session_global_id = id; + + *_global = global; + return NT_STATUS_OK; + } + + /* should not be reached */ + talloc_free(global); + return NT_STATUS_INTERNAL_ERROR; +} + +static void smbXsrv_session_global_verify_record(struct db_record *db_rec, + bool *is_free, + bool *was_free, + TALLOC_CTX *mem_ctx, + struct smbXsrv_session_global0 **_g, + uint32_t *pseqnum) +{ + TDB_DATA key; + TDB_DATA val; + DATA_BLOB blob; + struct smbXsrv_session_globalB global_blob; + enum ndr_err_code ndr_err; + struct smbXsrv_session_global0 *global = NULL; + bool exists; + TALLOC_CTX *frame = talloc_stackframe(); + + *is_free = false; + + if (was_free) { + *was_free = false; + } + if (_g) { + *_g = NULL; + } + if (pseqnum) { + *pseqnum = 0; + } + + key = dbwrap_record_get_key(db_rec); + + val = dbwrap_record_get_value(db_rec); + if (val.dsize == 0) { + TALLOC_FREE(frame); + *is_free = true; + if (was_free) { + *was_free = true; + } + return; + } + + blob = data_blob_const(val.dptr, val.dsize); + + ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob, + (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_session_globalB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + NTSTATUS status = ndr_map_error2ntstatus(ndr_err); + DBG_WARNING("smbXsrv_session_global_verify_record: " + "key '%s' ndr_pull_struct_blob - %s\n", + tdb_data_dbg(key), + nt_errstr(status)); + TALLOC_FREE(frame); + *is_free = true; + if (was_free) { + *was_free = true; + } + return; + } + + DBG_DEBUG("smbXsrv_session_global_verify_record\n"); + if (DEBUGLVL(DBGLVL_DEBUG)) { + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + } + + if (global_blob.version != SMBXSRV_VERSION_0) { + DBG_ERR("smbXsrv_session_global_verify_record: " + "key '%s' use unsupported version %u\n", + tdb_data_dbg(key), + global_blob.version); + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + TALLOC_FREE(frame); + *is_free = true; + if (was_free) { + *was_free = true; + } + return; + } + + global = global_blob.info.info0; + +#define __BLOB_KEEP_SECRET(__blob) do { \ + if ((__blob).length != 0) { \ + talloc_keep_secret((__blob).data); \ + } \ +} while(0) + { + uint32_t i; + __BLOB_KEEP_SECRET(global->application_key_blob); + __BLOB_KEEP_SECRET(global->signing_key_blob); + __BLOB_KEEP_SECRET(global->encryption_key_blob); + __BLOB_KEEP_SECRET(global->decryption_key_blob); + for (i = 0; i < global->num_channels; i++) { + __BLOB_KEEP_SECRET(global->channels[i].signing_key_blob); + } + } +#undef __BLOB_KEEP_SECRET + + exists = serverid_exists(&global->channels[0].server_id); + if (!exists) { + struct server_id_buf idbuf; + DBG_NOTICE("smbXsrv_session_global_verify_record: " + "key '%s' server_id %s does not exist.\n", + tdb_data_dbg(key), + server_id_str_buf(global->channels[0].server_id, + &idbuf)); + if (DEBUGLVL(DBGLVL_NOTICE)) { + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + } + TALLOC_FREE(frame); + dbwrap_record_delete(db_rec); + *is_free = true; + return; + } + + if (_g) { + *_g = talloc_move(mem_ctx, &global); + } + if (pseqnum) { + *pseqnum = global_blob.seqnum; + } + TALLOC_FREE(frame); +} + +static NTSTATUS smbXsrv_session_global_store(struct smbXsrv_session_global0 *global) +{ + struct smbXsrv_session_globalB global_blob; + DATA_BLOB blob = data_blob_null; + TDB_DATA key; + TDB_DATA val; + NTSTATUS status; + enum ndr_err_code ndr_err; + + /* + * TODO: if we use other versions than '0' + * we would add glue code here, that would be able to + * store the information in the old format. + */ + + if (global->db_rec == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + key = dbwrap_record_get_key(global->db_rec); + val = dbwrap_record_get_value(global->db_rec); + + ZERO_STRUCT(global_blob); + global_blob.version = smbXsrv_version_global_current(); + if (val.dsize >= 8) { + global_blob.seqnum = IVAL(val.dptr, 4); + } + global_blob.seqnum += 1; + global_blob.info.info0 = global; + + ndr_err = ndr_push_struct_blob(&blob, global->db_rec, &global_blob, + (ndr_push_flags_fn_t)ndr_push_smbXsrv_session_globalB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + status = ndr_map_error2ntstatus(ndr_err); + DBG_WARNING("smbXsrv_session_global_store: key '%s' ndr_push - %s\n", + tdb_data_dbg(key), + nt_errstr(status)); + TALLOC_FREE(global->db_rec); + return status; + } + + val = make_tdb_data(blob.data, blob.length); + status = dbwrap_record_store(global->db_rec, val, TDB_REPLACE); + if (!NT_STATUS_IS_OK(status)) { + DBG_WARNING("smbXsrv_session_global_store: key '%s' store - %s\n", + tdb_data_dbg(key), + nt_errstr(status)); + TALLOC_FREE(global->db_rec); + return status; + } + + if (DEBUGLVL(DBGLVL_DEBUG)) { + DBG_DEBUG("smbXsrv_session_global_store: key '%s' stored\n", + tdb_data_dbg(key)); + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + } + + TALLOC_FREE(global->db_rec); + + return NT_STATUS_OK; +} + +struct smb2srv_session_close_previous_state { + struct tevent_context *ev; + struct smbXsrv_connection *connection; + struct dom_sid *current_sid; + uint64_t previous_session_id; + uint64_t current_session_id; + struct db_record *db_rec; + uint64_t watch_instance; + uint32_t last_seqnum; +}; + +static void smb2srv_session_close_previous_cleanup(struct tevent_req *req, + enum tevent_req_state req_state) +{ + struct smb2srv_session_close_previous_state *state = + tevent_req_data(req, + struct smb2srv_session_close_previous_state); + + if (state->db_rec != NULL) { + dbwrap_watched_watch_remove_instance(state->db_rec, + state->watch_instance); + state->watch_instance = 0; + TALLOC_FREE(state->db_rec); + } +} + +static void smb2srv_session_close_previous_check(struct tevent_req *req); +static void smb2srv_session_close_previous_modified(struct tevent_req *subreq); + +struct tevent_req *smb2srv_session_close_previous_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct smbXsrv_connection *conn, + struct auth_session_info *session_info, + uint64_t previous_session_id, + uint64_t current_session_id) +{ + struct tevent_req *req; + struct smb2srv_session_close_previous_state *state; + uint32_t global_id = previous_session_id & UINT32_MAX; + uint64_t global_zeros = previous_session_id & 0xFFFFFFFF00000000LLU; + struct smbXsrv_session_table *table = conn->client->session_table; + struct security_token *current_token = NULL; + + req = tevent_req_create(mem_ctx, &state, + struct smb2srv_session_close_previous_state); + if (req == NULL) { + return NULL; + } + state->ev = ev; + state->connection = conn; + state->previous_session_id = previous_session_id; + state->current_session_id = current_session_id; + + tevent_req_set_cleanup_fn(req, smb2srv_session_close_previous_cleanup); + + if (global_zeros != 0) { + tevent_req_done(req); + return tevent_req_post(req, ev); + } + + if (session_info == NULL) { + tevent_req_done(req); + return tevent_req_post(req, ev); + } + current_token = session_info->security_token; + + if (current_token->num_sids > PRIMARY_USER_SID_INDEX) { + state->current_sid = ¤t_token->sids[PRIMARY_USER_SID_INDEX]; + } + + if (state->current_sid == NULL) { + tevent_req_done(req); + return tevent_req_post(req, ev); + } + + if (!security_token_has_nt_authenticated_users(current_token)) { + /* TODO */ + tevent_req_done(req); + return tevent_req_post(req, ev); + } + + state->db_rec = smbXsrv_session_global_fetch_locked( + table->global.db_ctx, + global_id, + state /* TALLOC_CTX */); + if (state->db_rec == NULL) { + tevent_req_nterror(req, NT_STATUS_UNSUCCESSFUL); + return tevent_req_post(req, ev); + } + + smb2srv_session_close_previous_check(req); + if (!tevent_req_is_in_progress(req)) { + return tevent_req_post(req, ev); + } + + return req; +} + +static void smb2srv_session_close_previous_check(struct tevent_req *req) +{ + struct smb2srv_session_close_previous_state *state = + tevent_req_data(req, + struct smb2srv_session_close_previous_state); + struct smbXsrv_connection *conn = state->connection; + DATA_BLOB blob; + struct security_token *previous_token = NULL; + struct smbXsrv_session_global0 *global = NULL; + enum ndr_err_code ndr_err; + struct smbXsrv_session_close0 close_info0; + struct smbXsrv_session_closeB close_blob; + struct tevent_req *subreq = NULL; + NTSTATUS status; + bool is_free = false; + uint32_t seqnum = 0; + + smbXsrv_session_global_verify_record(state->db_rec, + &is_free, + NULL, + state, + &global, + &seqnum); + + if (is_free) { + tevent_req_done(req); + return; + } + + if (global->auth_session_info == NULL) { + tevent_req_done(req); + return; + } + + previous_token = global->auth_session_info->security_token; + + if (!security_token_is_sid(previous_token, state->current_sid)) { + tevent_req_done(req); + return; + } + + /* + * If the record changed, but we are not happy with the change yet, + * we better remove ourself from the waiter list + * (most likely the first position) + * and re-add us at the end of the list. + * + * This gives other waiters a change + * to make progress. + * + * Otherwise we'll keep our waiter instance alive, + * keep waiting (most likely at first position). + * It means the order of watchers stays fair. + */ + if (state->last_seqnum != seqnum) { + state->last_seqnum = seqnum; + dbwrap_watched_watch_remove_instance(state->db_rec, + state->watch_instance); + state->watch_instance = + dbwrap_watched_watch_add_instance(state->db_rec); + } + + subreq = dbwrap_watched_watch_send(state, state->ev, state->db_rec, + state->watch_instance, + (struct server_id){0}); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, + smb2srv_session_close_previous_modified, + req); + + close_info0.old_session_global_id = global->session_global_id; + close_info0.old_session_wire_id = global->session_wire_id; + close_info0.old_creation_time = global->creation_time; + close_info0.new_session_wire_id = state->current_session_id; + + ZERO_STRUCT(close_blob); + close_blob.version = smbXsrv_version_global_current(); + close_blob.info.info0 = &close_info0; + + ndr_err = ndr_push_struct_blob(&blob, state, &close_blob, + (ndr_push_flags_fn_t)ndr_push_smbXsrv_session_closeB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + status = ndr_map_error2ntstatus(ndr_err); + DBG_WARNING("smb2srv_session_close_previous_check: " + "old_session[%llu] new_session[%llu] ndr_push - %s\n", + (unsigned long long)close_info0.old_session_wire_id, + (unsigned long long)close_info0.new_session_wire_id, + nt_errstr(status)); + tevent_req_nterror(req, status); + return; + } + + status = messaging_send(conn->client->msg_ctx, + global->channels[0].server_id, + MSG_SMBXSRV_SESSION_CLOSE, &blob); + TALLOC_FREE(global); + if (tevent_req_nterror(req, status)) { + return; + } + + TALLOC_FREE(state->db_rec); + return; +} + +static void smb2srv_session_close_previous_modified(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smb2srv_session_close_previous_state *state = + tevent_req_data(req, + struct smb2srv_session_close_previous_state); + uint32_t global_id; + NTSTATUS status; + uint64_t instance = 0; + + status = dbwrap_watched_watch_recv(subreq, &instance, NULL, NULL); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + state->watch_instance = instance; + + global_id = state->previous_session_id & UINT32_MAX; + + state->db_rec = smbXsrv_session_global_fetch_locked( + state->connection->client->session_table->global.db_ctx, + global_id, state /* TALLOC_CTX */); + if (state->db_rec == NULL) { + tevent_req_nterror(req, NT_STATUS_UNSUCCESSFUL); + return; + } + + smb2srv_session_close_previous_check(req); +} + +NTSTATUS smb2srv_session_close_previous_recv(struct tevent_req *req) +{ + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + tevent_req_received(req); + return status; + } + + tevent_req_received(req); + return NT_STATUS_OK; +} + +static NTSTATUS smbXsrv_session_clear_and_logoff(struct smbXsrv_session *session) +{ + NTSTATUS status; + struct smbXsrv_connection *xconn = NULL; + + if (session->client != NULL) { + xconn = session->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->session != session) { + continue; + } + + preq->session = NULL; + /* + * If we no longer have a session we can't + * sign or encrypt replies. + */ + preq->do_signing = false; + preq->do_encryption = false; + preq->preauth = NULL; + } + } + + status = smbXsrv_session_logoff(session); + return status; +} + +static int smbXsrv_session_destructor(struct smbXsrv_session *session) +{ + NTSTATUS status; + + DBG_DEBUG("destructing session(%llu)\n", + (unsigned long long)session->global->session_wire_id); + + status = smbXsrv_session_clear_and_logoff(session); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_destructor: " + "smbXsrv_session_logoff() failed: %s\n", + nt_errstr(status)); + } + + TALLOC_FREE(session->global); + + return 0; +} + +NTSTATUS smbXsrv_session_create(struct smbXsrv_connection *conn, + NTTIME now, + struct smbXsrv_session **_session) +{ + struct smbXsrv_session_table *table = conn->client->session_table; + struct db_record *local_rec = NULL; + struct smbXsrv_session *session = NULL; + void *ptr = NULL; + TDB_DATA val; + struct smbXsrv_session_global0 *global = NULL; + struct smbXsrv_channel_global0 *channel = NULL; + NTSTATUS status; + + if (table->local.num_sessions >= table->local.max_sessions) { + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + session = talloc_zero(table, struct smbXsrv_session); + if (session == NULL) { + return NT_STATUS_NO_MEMORY; + } + session->table = table; + session->idle_time = now; + session->status = NT_STATUS_MORE_PROCESSING_REQUIRED; + session->client = conn->client; + session->homes_snum = -1; + + status = smbXsrv_session_global_allocate(table->global.db_ctx, + session, + &global); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(session); + return status; + } + session->global = global; + + if (conn->protocol >= PROTOCOL_SMB2_02) { + uint64_t id = global->session_global_id; + + global->connection_dialect = conn->smb2.server.dialect; + global->client_guid = conn->smb2.client.guid; + + global->session_wire_id = id; + + status = smb2srv_tcon_table_init(session); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(session); + return status; + } + + session->local_id = global->session_global_id; + + local_rec = smbXsrv_session_local_fetch_locked( + table->local.db_ctx, + session->local_id, + session /* TALLOC_CTX */); + if (local_rec == NULL) { + TALLOC_FREE(session); + return NT_STATUS_NO_MEMORY; + } + + val = dbwrap_record_get_value(local_rec); + if (val.dsize != 0) { + TALLOC_FREE(session); + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + } else { + + status = smb1srv_session_local_allocate_id(table->local.db_ctx, + table->local.lowest_id, + table->local.highest_id, + session, + &local_rec, + &session->local_id); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(session); + return status; + } + + global->session_wire_id = session->local_id; + } + + global->creation_time = now; + global->expiration_time = GENSEC_EXPIRE_TIME_INFINITY; + + status = smbXsrv_session_add_channel(session, conn, now, &channel); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(session); + return status; + } + + ptr = session; + val = make_tdb_data((uint8_t const *)&ptr, sizeof(ptr)); + status = dbwrap_record_store(local_rec, val, TDB_REPLACE); + TALLOC_FREE(local_rec); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(session); + return status; + } + table->local.num_sessions += 1; + + talloc_set_destructor(session, smbXsrv_session_destructor); + + status = smbXsrv_session_global_store(global); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_create: " + "global_id (0x%08x) store failed - %s\n", + session->global->session_global_id, + nt_errstr(status)); + TALLOC_FREE(session); + return status; + } + + if (DEBUGLVL(DBGLVL_DEBUG)) { + struct smbXsrv_sessionB session_blob = { + .version = SMBXSRV_VERSION_0, + .info.info0 = session, + }; + + DBG_DEBUG("smbXsrv_session_create: global_id (0x%08x) stored\n", + session->global->session_global_id); + NDR_PRINT_DEBUG(smbXsrv_sessionB, &session_blob); + } + + *_session = session; + return NT_STATUS_OK; +} + +NTSTATUS smbXsrv_session_add_channel(struct smbXsrv_session *session, + struct smbXsrv_connection *conn, + NTTIME now, + struct smbXsrv_channel_global0 **_c) +{ + struct smbXsrv_session_global0 *global = session->global; + struct smbXsrv_channel_global0 *c = NULL; + + if (global->num_channels > 31) { + /* + * Windows allow up to 32 channels + */ + return NT_STATUS_INSUFFICIENT_RESOURCES; + } + + c = talloc_realloc(global, + global->channels, + struct smbXsrv_channel_global0, + global->num_channels + 1); + if (c == NULL) { + return NT_STATUS_NO_MEMORY; + } + global->channels = c; + + c = &global->channels[global->num_channels]; + ZERO_STRUCTP(c); + + c->server_id = messaging_server_id(conn->client->msg_ctx); + c->channel_id = conn->channel_id; + c->creation_time = now; + c->local_address = tsocket_address_string(conn->local_address, + global->channels); + if (c->local_address == NULL) { + return NT_STATUS_NO_MEMORY; + } + c->remote_address = tsocket_address_string(conn->remote_address, + global->channels); + if (c->remote_address == NULL) { + return NT_STATUS_NO_MEMORY; + } + c->remote_name = talloc_strdup(global->channels, + conn->remote_hostname); + if (c->remote_name == NULL) { + return NT_STATUS_NO_MEMORY; + } + c->connection = conn; + + global->num_channels += 1; + + *_c = c; + return NT_STATUS_OK; +} + +NTSTATUS smbXsrv_session_update(struct smbXsrv_session *session) +{ + struct smbXsrv_session_table *table = session->table; + NTSTATUS status; + + if (session->global->db_rec != NULL) { + DBG_ERR("smbXsrv_session_update(0x%08x): " + "Called with db_rec != NULL'\n", + session->global->session_global_id); + return NT_STATUS_INTERNAL_ERROR; + } + + if (table == NULL) { + DBG_ERR("smbXsrv_session_update(0x%08x): " + "Called with table == NULL'\n", + session->global->session_global_id); + return NT_STATUS_INTERNAL_ERROR; + } + + session->global->db_rec = smbXsrv_session_global_fetch_locked( + table->global.db_ctx, + session->global->session_global_id, + session->global /* TALLOC_CTX */); + if (session->global->db_rec == NULL) { + return NT_STATUS_INTERNAL_DB_ERROR; + } + + status = smbXsrv_session_global_store(session->global); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_update: " + "global_id (0x%08x) store failed - %s\n", + session->global->session_global_id, + nt_errstr(status)); + return status; + } + + if (DEBUGLVL(DBGLVL_DEBUG)) { + struct smbXsrv_sessionB session_blob = { + .version = SMBXSRV_VERSION_0, + .info.info0 = session, + }; + + DBG_DEBUG("smbXsrv_session_update: global_id (0x%08x) stored\n", + session->global->session_global_id); + NDR_PRINT_DEBUG(smbXsrv_sessionB, &session_blob); + } + + return NT_STATUS_OK; +} + +NTSTATUS smbXsrv_session_find_channel(const struct smbXsrv_session *session, + const struct smbXsrv_connection *conn, + struct smbXsrv_channel_global0 **_c) +{ + uint32_t i; + + for (i=0; i < session->global->num_channels; i++) { + struct smbXsrv_channel_global0 *c = &session->global->channels[i]; + + if (c->channel_id != conn->channel_id) { + continue; + } + + if (c->connection != conn) { + continue; + } + + *_c = c; + return NT_STATUS_OK; + } + + return NT_STATUS_USER_SESSION_DELETED; +} + +NTSTATUS smbXsrv_session_find_auth(const struct smbXsrv_session *session, + const struct smbXsrv_connection *conn, + NTTIME now, + struct smbXsrv_session_auth0 **_a) +{ + struct smbXsrv_session_auth0 *a; + + for (a = session->pending_auth; a != NULL; a = a->next) { + if (a->channel_id != conn->channel_id) { + continue; + } + + if (a->connection == conn) { + if (now != 0) { + a->idle_time = now; + } + *_a = a; + return NT_STATUS_OK; + } + } + + return NT_STATUS_USER_SESSION_DELETED; +} + +static int smbXsrv_session_auth0_destructor(struct smbXsrv_session_auth0 *a) +{ + if (a->session == NULL) { + return 0; + } + + DLIST_REMOVE(a->session->pending_auth, a); + a->session = NULL; + return 0; +} + +NTSTATUS smbXsrv_session_create_auth(struct smbXsrv_session *session, + struct smbXsrv_connection *conn, + NTTIME now, + uint8_t in_flags, + uint8_t in_security_mode, + struct smbXsrv_session_auth0 **_a) +{ + struct smbXsrv_session_auth0 *a; + NTSTATUS status; + + status = smbXsrv_session_find_auth(session, conn, 0, &a); + if (NT_STATUS_IS_OK(status)) { + return NT_STATUS_INTERNAL_ERROR; + } + + a = talloc_zero(session, struct smbXsrv_session_auth0); + if (a == NULL) { + return NT_STATUS_NO_MEMORY; + } + a->session = session; + a->connection = conn; + a->in_flags = in_flags; + a->in_security_mode = in_security_mode; + a->creation_time = now; + a->idle_time = now; + a->channel_id = conn->channel_id; + + if (conn->protocol >= PROTOCOL_SMB3_11) { + a->preauth = talloc(a, struct smbXsrv_preauth); + if (a->preauth == NULL) { + TALLOC_FREE(session); + return NT_STATUS_NO_MEMORY; + } + *a->preauth = conn->smb2.preauth; + } + + talloc_set_destructor(a, smbXsrv_session_auth0_destructor); + DLIST_ADD_END(session->pending_auth, a); + + *_a = a; + return NT_STATUS_OK; +} + +static void smbXsrv_session_remove_channel_done(struct tevent_req *subreq); + +NTSTATUS smbXsrv_session_remove_channel(struct smbXsrv_session *session, + struct smbXsrv_connection *xconn) +{ + struct smbXsrv_session_auth0 *a = NULL; + struct smbXsrv_channel_global0 *c = NULL; + NTSTATUS status; + bool need_update = false; + + status = smbXsrv_session_find_auth(session, xconn, 0, &a); + if (!NT_STATUS_IS_OK(status)) { + a = NULL; + } + status = smbXsrv_session_find_channel(session, xconn, &c); + if (!NT_STATUS_IS_OK(status)) { + c = NULL; + } + + if (a != NULL) { + smbXsrv_session_auth0_destructor(a); + a->connection = NULL; + need_update = true; + } + + if (c != NULL) { + struct smbXsrv_session_global0 *global = session->global; + ptrdiff_t n; + + n = (c - global->channels); + if (n >= global->num_channels || n < 0) { + return NT_STATUS_INTERNAL_ERROR; + } + ARRAY_DEL_ELEMENT(global->channels, n, global->num_channels); + global->num_channels--; + if (global->num_channels == 0) { + struct smbXsrv_client *client = session->client; + struct tevent_queue *xconn_wait_queue = + xconn->transport.shutdown_wait_queue; + struct tevent_req *subreq = NULL; + + /* + * Let the connection wait until the session is + * destroyed. + * + * We don't set a callback, as we just want to block the + * wait queue and the talloc_free() of the session will + * remove the item from the wait queue in order + * to remove allow the connection to disappear. + */ + if (xconn_wait_queue != NULL) { + subreq = tevent_queue_wait_send(session, + client->raw_ev_ctx, + xconn_wait_queue); + if (subreq == NULL) { + status = NT_STATUS_NO_MEMORY; + DBG_ERR("tevent_queue_wait_send() session(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + return status; + } + } + + /* + * This is guaranteed to set + * session->status = NT_STATUS_USER_SESSION_DELETED + * even if NULL is returned. + */ + subreq = smb2srv_session_shutdown_send(session, + client->raw_ev_ctx, + session, + NULL); + if (subreq == NULL) { + status = NT_STATUS_NO_MEMORY; + DBG_ERR("smb2srv_session_shutdown_send(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + return status; + } + tevent_req_set_callback(subreq, + smbXsrv_session_remove_channel_done, + session); + } + need_update = true; + } + + if (!need_update) { + return NT_STATUS_OK; + } + + return smbXsrv_session_update(session); +} + +static void smbXsrv_session_remove_channel_done(struct tevent_req *subreq) +{ + struct smbXsrv_session *session = + tevent_req_callback_data(subreq, + struct smbXsrv_session); + NTSTATUS status; + + status = smb2srv_session_shutdown_recv(subreq); + TALLOC_FREE(subreq); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smb2srv_session_shutdown_recv(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + } + + status = smbXsrv_session_logoff(session); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_logoff(%llu) failed: %s\n", + (unsigned long long)session->global->session_wire_id, + nt_errstr(status)); + } + + TALLOC_FREE(session); +} + +struct smb2srv_session_shutdown_state { + struct tevent_queue *wait_queue; +}; + +static void smb2srv_session_shutdown_wait_done(struct tevent_req *subreq); + +struct tevent_req *smb2srv_session_shutdown_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct smbXsrv_session *session, + struct smbd_smb2_request *current_req) +{ + struct tevent_req *req; + struct smb2srv_session_shutdown_state *state; + struct tevent_req *subreq; + struct smbXsrv_connection *xconn = NULL; + size_t len = 0; + + /* + * Make sure that no new request will be able to use this session. + */ + session->status = NT_STATUS_USER_SESSION_DELETED; + + req = tevent_req_create(mem_ctx, &state, + struct smb2srv_session_shutdown_state); + if (req == NULL) { + return NULL; + } + + state->wait_queue = tevent_queue_create(state, "smb2srv_session_shutdown_queue"); + if (tevent_req_nomem(state->wait_queue, req)) { + return tevent_req_post(req, ev); + } + + for (xconn = session->client->connections; xconn != NULL; xconn = xconn->next) { + struct smbd_smb2_request *preq; + + for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) { + if (preq == current_req) { + /* Can't cancel current request. */ + continue; + } + if (preq->session != session) { + /* Request on different session. */ + 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); + } + } + } + + len = tevent_queue_length(state->wait_queue); + if (len == 0) { + tevent_req_done(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, smb2srv_session_shutdown_wait_done, req); + + return req; +} + +static void smb2srv_session_shutdown_wait_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + + tevent_queue_wait_recv(subreq); + TALLOC_FREE(subreq); + + tevent_req_done(req); +} + +NTSTATUS smb2srv_session_shutdown_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +NTSTATUS smbXsrv_session_logoff(struct smbXsrv_session *session) +{ + struct smbXsrv_session_table *table; + struct db_record *local_rec = NULL; + struct db_record *global_rec = NULL; + struct smbd_server_connection *sconn = NULL; + NTSTATUS status; + NTSTATUS error = NT_STATUS_OK; + + if (session->table == NULL) { + return NT_STATUS_OK; + } + + table = session->table; + session->table = NULL; + + sconn = session->client->sconn; + session->client = NULL; + session->status = NT_STATUS_USER_SESSION_DELETED; + + /* + * For SMB2 this is a bit redundant as files are also close + * below via smb2srv_tcon_disconnect_all() -> ... -> + * smbXsrv_tcon_disconnect() -> close_cnum() -> + * file_close_conn(). + */ + file_close_user(sconn, session->global->session_wire_id); + + if (session->tcon_table != NULL) { + /* + * Note: We only have a tcon_table for SMB2. + */ + status = smb2srv_tcon_disconnect_all(session); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_logoff(0x%08x): " + "smb2srv_tcon_disconnect_all() failed: %s\n", + session->global->session_global_id, + nt_errstr(status)); + error = status; + } + } + + invalidate_vuid(sconn, session->global->session_wire_id); + + global_rec = session->global->db_rec; + session->global->db_rec = NULL; + if (global_rec == NULL) { + global_rec = smbXsrv_session_global_fetch_locked( + table->global.db_ctx, + session->global->session_global_id, + session->global /* TALLOC_CTX */); + if (global_rec == NULL) { + error = NT_STATUS_INTERNAL_ERROR; + } + } + + if (global_rec != NULL) { + status = dbwrap_record_delete(global_rec); + if (!NT_STATUS_IS_OK(status)) { + TDB_DATA key = dbwrap_record_get_key(global_rec); + + DBG_ERR("smbXsrv_session_logoff(0x%08x): " + "failed to delete global key '%s': %s\n", + session->global->session_global_id, + tdb_data_dbg(key), + nt_errstr(status)); + error = status; + } + } + TALLOC_FREE(global_rec); + + local_rec = session->db_rec; + if (local_rec == NULL) { + local_rec = smbXsrv_session_local_fetch_locked( + table->local.db_ctx, + session->local_id, + session /* TALLOC_CTX */); + if (local_rec == NULL) { + error = NT_STATUS_INTERNAL_ERROR; + } + } + + if (local_rec != NULL) { + status = dbwrap_record_delete(local_rec); + if (!NT_STATUS_IS_OK(status)) { + TDB_DATA key = dbwrap_record_get_key(local_rec); + + DBG_ERR("smbXsrv_session_logoff(0x%08x): " + "failed to delete local key '%s': %s\n", + session->global->session_global_id, + tdb_data_dbg(key), + nt_errstr(status)); + error = status; + } + table->local.num_sessions -= 1; + } + if (session->db_rec == NULL) { + TALLOC_FREE(local_rec); + } + session->db_rec = NULL; + + return error; +} + +struct smbXsrv_session_logoff_all_state { + NTSTATUS first_status; + int errors; +}; + +static int smbXsrv_session_logoff_all_callback(struct db_record *local_rec, + void *private_data); + +NTSTATUS smbXsrv_session_logoff_all(struct smbXsrv_client *client) +{ + struct smbXsrv_session_table *table = client->session_table; + struct smbXsrv_session_logoff_all_state state; + NTSTATUS status; + int count = 0; + + if (table == NULL) { + DBG_DEBUG("smbXsrv_session_logoff_all: " + "empty session_table, nothing to do.\n"); + return NT_STATUS_OK; + } + + ZERO_STRUCT(state); + + status = dbwrap_traverse(table->local.db_ctx, + smbXsrv_session_logoff_all_callback, + &state, &count); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("smbXsrv_session_logoff_all: " + "dbwrap_traverse() failed: %s\n", + nt_errstr(status)); + return status; + } + + if (!NT_STATUS_IS_OK(state.first_status)) { + DBG_ERR("smbXsrv_session_logoff_all: " + "count[%d] errors[%d] first[%s]\n", + count, state.errors, + nt_errstr(state.first_status)); + return state.first_status; + } + + return NT_STATUS_OK; +} + +static int smbXsrv_session_logoff_all_callback(struct db_record *local_rec, + void *private_data) +{ + struct smbXsrv_session_logoff_all_state *state = + (struct smbXsrv_session_logoff_all_state *)private_data; + TDB_DATA val; + void *ptr = NULL; + struct smbXsrv_session *session = NULL; + NTSTATUS status; + + val = dbwrap_record_get_value(local_rec); + if (val.dsize != sizeof(ptr)) { + status = NT_STATUS_INTERNAL_ERROR; + if (NT_STATUS_IS_OK(state->first_status)) { + state->first_status = status; + } + state->errors++; + return 0; + } + + memcpy(&ptr, val.dptr, val.dsize); + session = talloc_get_type_abort(ptr, struct smbXsrv_session); + + session->db_rec = local_rec; + status = smbXsrv_session_clear_and_logoff(session); + session->db_rec = NULL; + if (!NT_STATUS_IS_OK(status)) { + if (NT_STATUS_IS_OK(state->first_status)) { + state->first_status = status; + } + state->errors++; + return 0; + } + + return 0; +} + +struct smbXsrv_session_local_trav_state { + NTSTATUS status; + int (*caller_cb)(struct smbXsrv_session *session, + void *caller_data); + void *caller_data; +}; + +static int smbXsrv_session_local_traverse_cb(struct db_record *local_rec, + void *private_data); + +NTSTATUS smbXsrv_session_local_traverse( + struct smbXsrv_client *client, + int (*caller_cb)(struct smbXsrv_session *session, + void *caller_data), + void *caller_data) +{ + struct smbXsrv_session_table *table = client->session_table; + struct smbXsrv_session_local_trav_state state; + NTSTATUS status; + int count = 0; + + state = (struct smbXsrv_session_local_trav_state) { + .status = NT_STATUS_OK, + .caller_cb = caller_cb, + .caller_data = caller_data, + }; + + if (table == NULL) { + DBG_DEBUG("empty session_table, nothing to do.\n"); + return NT_STATUS_OK; + } + + status = dbwrap_traverse(table->local.db_ctx, + smbXsrv_session_local_traverse_cb, + &state, + &count); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("dbwrap_traverse() failed: %s\n", nt_errstr(status)); + return status; + } + if (!NT_STATUS_IS_OK(state.status)) { + DBG_ERR("count[%d] status[%s]\n", + count, nt_errstr(state.status)); + return state.status; + } + + return NT_STATUS_OK; +} + +static int smbXsrv_session_local_traverse_cb(struct db_record *local_rec, + void *private_data) +{ + struct smbXsrv_session_local_trav_state *state = + (struct smbXsrv_session_local_trav_state *)private_data; + TDB_DATA val; + void *ptr = NULL; + struct smbXsrv_session *session = NULL; + int ret; + + val = dbwrap_record_get_value(local_rec); + if (val.dsize != sizeof(ptr)) { + state->status = NT_STATUS_INTERNAL_ERROR; + return -1; + } + + memcpy(&ptr, val.dptr, val.dsize); + session = talloc_get_type_abort(ptr, struct smbXsrv_session); + + session->db_rec = local_rec; + ret = state->caller_cb(session, state->caller_data); + session->db_rec = NULL; + + return ret; +} + +struct smbXsrv_session_disconnect_xconn_state { + struct smbXsrv_connection *xconn; + NTSTATUS first_status; + int errors; +}; + +static int smbXsrv_session_disconnect_xconn_callback(struct db_record *local_rec, + void *private_data); + +NTSTATUS smbXsrv_session_disconnect_xconn(struct smbXsrv_connection *xconn) +{ + struct smbXsrv_client *client = xconn->client; + struct smbXsrv_session_table *table = client->session_table; + struct smbXsrv_session_disconnect_xconn_state state; + NTSTATUS status; + int count = 0; + + if (table == NULL) { + DBG_ERR("empty session_table, nothing to do.\n"); + return NT_STATUS_OK; + } + + ZERO_STRUCT(state); + state.xconn = xconn; + + status = dbwrap_traverse(table->local.db_ctx, + smbXsrv_session_disconnect_xconn_callback, + &state, &count); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("dbwrap_traverse() failed: %s\n", + nt_errstr(status)); + return status; + } + + if (!NT_STATUS_IS_OK(state.first_status)) { + DBG_ERR("count[%d] errors[%d] first[%s]\n", + count, state.errors, + nt_errstr(state.first_status)); + return state.first_status; + } + + return NT_STATUS_OK; +} + +static int smbXsrv_session_disconnect_xconn_callback(struct db_record *local_rec, + void *private_data) +{ + struct smbXsrv_session_disconnect_xconn_state *state = + (struct smbXsrv_session_disconnect_xconn_state *)private_data; + TDB_DATA val; + void *ptr = NULL; + struct smbXsrv_session *session = NULL; + NTSTATUS status; + + val = dbwrap_record_get_value(local_rec); + if (val.dsize != sizeof(ptr)) { + status = NT_STATUS_INTERNAL_ERROR; + if (NT_STATUS_IS_OK(state->first_status)) { + state->first_status = status; + } + state->errors++; + return 0; + } + + memcpy(&ptr, val.dptr, val.dsize); + session = talloc_get_type_abort(ptr, struct smbXsrv_session); + + session->db_rec = local_rec; + status = smbXsrv_session_remove_channel(session, state->xconn); + session->db_rec = NULL; + if (!NT_STATUS_IS_OK(status)) { + if (NT_STATUS_IS_OK(state->first_status)) { + state->first_status = status; + } + state->errors++; + } + + return 0; +} + +NTSTATUS smb1srv_session_table_init(struct smbXsrv_connection *conn) +{ + /* + * Allow a range from 1..65534 with 65534 values. + */ + return smbXsrv_session_table_init(conn, 1, UINT16_MAX - 1, + UINT16_MAX - 1); +} + +NTSTATUS smb1srv_session_lookup(struct smbXsrv_connection *conn, + uint16_t vuid, NTTIME now, + struct smbXsrv_session **session) +{ + struct smbXsrv_session_table *table = conn->client->session_table; + uint32_t local_id = vuid; + + return smbXsrv_session_local_lookup(table, conn, local_id, now, + session); +} + +NTSTATUS smbXsrv_session_info_lookup(struct smbXsrv_client *client, + uint64_t session_wire_id, + struct auth_session_info **si) +{ + struct smbXsrv_session_table *table = client->session_table; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + struct smbXsrv_session_local_fetch_state state = { + .session = NULL, + .status = NT_STATUS_INTERNAL_ERROR, + }; + TDB_DATA key; + NTSTATUS status; + + if (session_wire_id == 0) { + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table == NULL) { + /* this might happen before the end of negprot */ + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table->local.db_ctx == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + key = smbXsrv_session_local_id_to_key(session_wire_id, key_buf); + + status = dbwrap_parse_record(table->local.db_ctx, key, + smbXsrv_session_local_fetch_parser, + &state); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + if (!NT_STATUS_IS_OK(state.status)) { + return state.status; + } + if (state.session->global->auth_session_info == NULL) { + return NT_STATUS_USER_SESSION_DELETED; + } + + *si = state.session->global->auth_session_info; + return NT_STATUS_OK; +} + +/* + * In memory of get_valid_user_struct() + * + * This function is similar to smbXsrv_session_local_lookup() and it's wrappers, + * but it doesn't implement the state checks of + * those. get_valid_smbXsrv_session() is NOT meant to be called to validate the + * session wire-id of incoming SMB requests, it MUST only be used in later + * internal processing where the session wire-id has already been validated. + */ +NTSTATUS get_valid_smbXsrv_session(struct smbXsrv_client *client, + uint64_t session_wire_id, + struct smbXsrv_session **session) +{ + struct smbXsrv_session_table *table = client->session_table; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + struct smbXsrv_session_local_fetch_state state = { + .session = NULL, + .status = NT_STATUS_INTERNAL_ERROR, + }; + TDB_DATA key; + NTSTATUS status; + + if (session_wire_id == 0) { + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table == NULL) { + /* this might happen before the end of negprot */ + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table->local.db_ctx == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + key = smbXsrv_session_local_id_to_key(session_wire_id, key_buf); + + status = dbwrap_parse_record(table->local.db_ctx, key, + smbXsrv_session_local_fetch_parser, + &state); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + if (!NT_STATUS_IS_OK(state.status)) { + return state.status; + } + if (state.session->global->auth_session_info == NULL) { + return NT_STATUS_USER_SESSION_DELETED; + } + + *session = state.session; + return NT_STATUS_OK; +} + +NTSTATUS smb2srv_session_lookup_global(struct smbXsrv_client *client, + uint64_t session_wire_id, + TALLOC_CTX *mem_ctx, + struct smbXsrv_session **_session) +{ + TALLOC_CTX *frame = talloc_stackframe(); + struct smbXsrv_session_table *table = client->session_table; + uint32_t global_id = session_wire_id & UINT32_MAX; + uint64_t global_zeros = session_wire_id & 0xFFFFFFFF00000000LLU; + struct smbXsrv_session *session = NULL; + struct db_record *global_rec = NULL; + bool is_free = false; + NTSTATUS status; + + if (global_id == 0) { + TALLOC_FREE(frame); + return NT_STATUS_USER_SESSION_DELETED; + } + if (global_zeros != 0) { + TALLOC_FREE(frame); + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table == NULL) { + /* this might happen before the end of negprot */ + TALLOC_FREE(frame); + return NT_STATUS_USER_SESSION_DELETED; + } + + if (table->global.db_ctx == NULL) { + TALLOC_FREE(frame); + return NT_STATUS_INTERNAL_ERROR; + } + + session = talloc_zero(mem_ctx, struct smbXsrv_session); + if (session == NULL) { + TALLOC_FREE(frame); + return NT_STATUS_NO_MEMORY; + } + talloc_steal(frame, session); + + session->client = client; + session->status = NT_STATUS_BAD_LOGON_SESSION_STATE; + session->local_id = global_id; + + /* + * This means smb2_get_new_nonce() will return + * NT_STATUS_ENCRYPTION_FAILED. + * + * But we initialize some random parts just in case... + */ + session->nonce_high_max = session->nonce_high = 0; + generate_nonce_buffer((uint8_t *)&session->nonce_high_random, + sizeof(session->nonce_high_random)); + generate_nonce_buffer((uint8_t *)&session->nonce_low, + sizeof(session->nonce_low)); + + global_rec = smbXsrv_session_global_fetch_locked(table->global.db_ctx, + global_id, + frame); + if (global_rec == NULL) { + TALLOC_FREE(frame); + return NT_STATUS_INTERNAL_DB_ERROR; + } + + smbXsrv_session_global_verify_record(global_rec, + &is_free, + NULL, + session, + &session->global, + NULL); + if (is_free) { + TALLOC_FREE(frame); + return NT_STATUS_USER_SESSION_DELETED; + } + + /* + * We don't have channels on this session + * and only the main signing key + */ + session->global->num_channels = 0; + status = smb2_signing_key_sign_create(session->global, + session->global->signing_algo, + NULL, /* no master key */ + NULL, /* derivations */ + &session->global->signing_key); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(frame); + return NT_STATUS_NO_MEMORY; + } + session->global->signing_key->blob = session->global->signing_key_blob; + session->global->signing_flags = 0; + + status = smb2_signing_key_cipher_create(session->global, + session->global->encryption_cipher, + NULL, /* no master key */ + NULL, /* derivations */ + &session->global->decryption_key); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(frame); + return NT_STATUS_NO_MEMORY; + } + session->global->decryption_key->blob = session->global->decryption_key_blob; + session->global->encryption_flags = 0; + + *_session = talloc_move(mem_ctx, &session); + TALLOC_FREE(frame); + return NT_STATUS_OK; +} + +NTSTATUS smb2srv_session_table_init(struct smbXsrv_connection *conn) +{ + /* + * Allow a range from 1..4294967294 with 65534 (same as SMB1) values. + */ + return smbXsrv_session_table_init(conn, 1, UINT32_MAX - 1, + UINT16_MAX - 1); +} + +static NTSTATUS smb2srv_session_lookup_raw(struct smbXsrv_session_table *table, + /* conn: optional */ + struct smbXsrv_connection *conn, + uint64_t session_id, NTTIME now, + struct smbXsrv_session **session) +{ + uint32_t local_id = session_id & UINT32_MAX; + uint64_t local_zeros = session_id & 0xFFFFFFFF00000000LLU; + + if (local_zeros != 0) { + return NT_STATUS_USER_SESSION_DELETED; + } + + return smbXsrv_session_local_lookup(table, conn, local_id, now, + session); +} + +NTSTATUS smb2srv_session_lookup_conn(struct smbXsrv_connection *conn, + uint64_t session_id, NTTIME now, + struct smbXsrv_session **session) +{ + struct smbXsrv_session_table *table = conn->client->session_table; + return smb2srv_session_lookup_raw(table, conn, session_id, now, + session); +} + +NTSTATUS smb2srv_session_lookup_client(struct smbXsrv_client *client, + uint64_t session_id, NTTIME now, + struct smbXsrv_session **session) +{ + struct smbXsrv_session_table *table = client->session_table; + return smb2srv_session_lookup_raw(table, NULL, session_id, now, + session); +} + +struct smbXsrv_session_global_traverse_state { + int (*fn)(struct smbXsrv_session_global0 *, void *); + void *private_data; +}; + +static int smbXsrv_session_global_traverse_fn(struct db_record *rec, void *data) +{ + int ret = -1; + struct smbXsrv_session_global_traverse_state *state = + (struct smbXsrv_session_global_traverse_state*)data; + TDB_DATA key = dbwrap_record_get_key(rec); + TDB_DATA val = dbwrap_record_get_value(rec); + DATA_BLOB blob = data_blob_const(val.dptr, val.dsize); + struct smbXsrv_session_globalB global_blob; + enum ndr_err_code ndr_err; + TALLOC_CTX *frame = talloc_stackframe(); + + ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob, + (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_session_globalB); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + DBG_WARNING("Invalid record in smbXsrv_session_global.tdb:" + "key '%s' ndr_pull_struct_blob - %s\n", + tdb_data_dbg(key), + ndr_errstr(ndr_err)); + goto done; + } + + if (global_blob.version != SMBXSRV_VERSION_0) { + DBG_WARNING("Invalid record in smbXsrv_session_global.tdb:" + "key '%s' unsupported version - %d\n", + tdb_data_dbg(key), + (int)global_blob.version); + goto done; + } + + if (global_blob.info.info0 == NULL) { + DBG_WARNING("Invalid record in smbXsrv_tcon_global.tdb:" + "key '%s' info0 NULL pointer\n", + tdb_data_dbg(key)); + goto done; + } + + global_blob.info.info0->db_rec = rec; + ret = state->fn(global_blob.info.info0, state->private_data); +done: + TALLOC_FREE(frame); + return ret; +} + +NTSTATUS smbXsrv_session_global_traverse( + int (*fn)(struct smbXsrv_session_global0 *, void *), + void *private_data) +{ + + NTSTATUS status; + int count = 0; + struct smbXsrv_session_global_traverse_state state = { + .fn = fn, + .private_data = private_data, + }; + + become_root(); + status = smbXsrv_session_global_init(NULL); + if (!NT_STATUS_IS_OK(status)) { + unbecome_root(); + DBG_ERR("Failed to initialize session_global: %s\n", + nt_errstr(status)); + return status; + } + + status = dbwrap_traverse_read(smbXsrv_session_global_db_ctx, + smbXsrv_session_global_traverse_fn, + &state, + &count); + unbecome_root(); + + return status; +} |