diff options
Diffstat (limited to 'source3/smbd')
| -rw-r--r-- | source3/smbd/globals.h | 19 | ||||
| -rw-r--r-- | source3/smbd/server.c | 4 | ||||
| -rw-r--r-- | source3/smbd/smbXsrv_session.c | 1139 |
3 files changed, 1162 insertions, 0 deletions
diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h index 2614ebe631..e452ae7aa1 100644 --- a/source3/smbd/globals.h +++ b/source3/smbd/globals.h @@ -19,6 +19,7 @@ */ #include "system/select.h" +#include "librpc/gen_ndr/smbXsrv.h" #if defined(HAVE_AIO) struct aio_extra; @@ -354,6 +355,8 @@ struct smbXsrv_connection { struct msg_state *msg_state; uint64_t smbd_idle_profstamp; + + struct smbXsrv_session_table *session_table; }; NTSTATUS smbXsrv_version_global_init(const struct server_id *server_id); @@ -362,6 +365,22 @@ uint32_t smbXsrv_version_global_current(void); NTSTATUS smbXsrv_connection_init_tables(struct smbXsrv_connection *conn, enum protocol_types protocol); +NTSTATUS smbXsrv_session_global_init(void); +NTSTATUS smbXsrv_session_create(struct smbXsrv_connection *conn, + NTTIME now, + struct smbXsrv_session **_session); +NTSTATUS smbXsrv_session_update(struct smbXsrv_session *session); +NTSTATUS smbXsrv_session_logoff(struct smbXsrv_session *session); +NTSTATUS smbXsrv_session_logoff_all(struct smbXsrv_connection *conn); +NTSTATUS smb1srv_session_table_init(struct smbXsrv_connection *conn); +NTSTATUS smb1srv_session_lookup(struct smbXsrv_connection *conn, + uint16_t vuid, NTTIME now, + struct smbXsrv_session **session); +NTSTATUS smb2srv_session_table_init(struct smbXsrv_connection *conn); +NTSTATUS smb2srv_session_lookup(struct smbXsrv_connection *conn, + uint64_t session_id, NTTIME now, + struct smbXsrv_session **session); + struct smbd_smb2_request { struct smbd_smb2_request *prev, *next; diff --git a/source3/smbd/server.c b/source3/smbd/server.c index ee4538c4ed..575c42a6f0 100644 --- a/source3/smbd/server.c +++ b/source3/smbd/server.c @@ -1387,6 +1387,10 @@ extern void build_options(bool screen); if (!sessionid_init()) { exit(1); } + status = smbXsrv_session_global_init(); + if (!NT_STATUS_IS_OK(status)) { + exit(1); + } if (!connections_init(True)) exit(1); diff --git a/source3/smbd/smbXsrv_session.c b/source3/smbd/smbXsrv_session.c new file mode 100644 index 0000000000..670e47ccc2 --- /dev/null +++ b/source3/smbd/smbXsrv_session.c @@ -0,0 +1,1139 @@ +/* + 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 "smbd/smbd.h" +#include "smbd/globals.h" +#include "dbwrap/dbwrap.h" +#include "dbwrap/dbwrap_rbt.h" +#include "dbwrap/dbwrap_open.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" + +struct smbXsrv_session_table { + struct { + struct db_context *db_ctx; + uint32_t lowest_id; + uint32_t highest_id; + 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(void) +{ + const char *global_path = 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("smbXsrv_session_global.tdb"); + + db_ctx = db_open(NULL, global_path, + 0, /* hash_size */ + TDB_DEFAULT | + TDB_CLEAR_IF_FIRST | + TDB_INCOMPATIBLE_HASH, + O_RDWR | O_CREAT, 0600, + DBWRAP_LOCK_ORDER_1); + if (db_ctx == NULL) { + NTSTATUS status; + + status = map_nt_error_from_unix_common(errno); + + return status; + } + + 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 NTSTATUS smbXsrv_session_table_init(struct smbXsrv_connection *conn, + uint32_t lowest_id, + uint32_t highest_id) +{ + struct smbXsrv_session_table *table; + NTSTATUS status; + + table = talloc_zero(conn, 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; + + status = smbXsrv_session_global_init(); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(table); + return status; + } + + table->global.db_ctx = smbXsrv_session_global_db_ctx; + + conn->session_table = table; + return NT_STATUS_OK; +} + +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; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + 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; + } + + key = smbXsrv_session_local_id_to_key(id, key_buf); + + rec = dbwrap_fetch_locked(db, mem_ctx, key); + 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; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + TDB_DATA val; + struct db_record *rec = NULL; + + id = state.useable_id; + + key = smbXsrv_session_local_id_to_key(id, key_buf); + + rec = dbwrap_fetch_locked(db, mem_ctx, key); + 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, + 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; + } + + 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); + +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; + uint8_t key_buf[SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE]; + TDB_DATA key; + + if (i >= min_tries && last_free != 0) { + id = last_free; + } else { + id = generate_random(); + } + if (id == 0) { + id++; + } + if (id == UINT32_MAX) { + id--; + } + + key = smbXsrv_session_global_id_to_key(id, key_buf); + + global->db_rec = dbwrap_fetch_locked(db, mem_ctx, key); + 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); + + 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) +{ + 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; + } + + 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); + DEBUG(1,("smbXsrv_session_global_verify_record: " + "key '%s' ndr_pull_struct_blob - %s\n", + hex_encode_talloc(frame, key.dptr, key.dsize), + nt_errstr(status))); + TALLOC_FREE(frame); + return; + } + + DEBUG(10,("smbXsrv_session_global_verify_record\n")); + if (DEBUGLVL(10)) { + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + } + + if (global_blob.version != SMBXSRV_VERSION_0) { + DEBUG(0,("smbXsrv_session_global_verify_record: " + "key '%s' use unsupported version %u\n", + hex_encode_talloc(frame, key.dptr, key.dsize), + global_blob.version)); + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + TALLOC_FREE(frame); + return; + } + + global = global_blob.info.info0; + + exists = serverid_exists(&global->channels[0].server_id); + if (!exists) { + DEBUG(2,("smbXsrv_session_global_verify_record: " + "key '%s' server_id %s does not exist.\n", + hex_encode_talloc(frame, key.dptr, key.dsize), + server_id_str(frame, &global->channels[0].server_id))); + if (DEBUGLVL(2)) { + 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); + } + TALLOC_FREE(frame); +} + +static NTSTATUS smbXsrv_session_global_store(struct smbXsrv_connection *sconn, + 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); + DEBUG(1,("smbXsrv_session_global_store: key '%s' ndr_push - %s\n", + hex_encode_talloc(global->db_rec, key.dptr, key.dsize), + 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)) { + DEBUG(1,("smbXsrv_session_global_store: key '%s' store - %s\n", + hex_encode_talloc(global->db_rec, key.dptr, key.dsize), + nt_errstr(status))); + TALLOC_FREE(global->db_rec); + return status; + } + + if (DEBUGLVL(10)) { + DEBUG(10,("smbXsrv_session_global_store: key '%s' stored\n", + hex_encode_talloc(global->db_rec, key.dptr, key.dsize))); + NDR_PRINT_DEBUG(smbXsrv_session_globalB, &global_blob); + } + + TALLOC_FREE(global->db_rec); + + return NT_STATUS_OK; +} + +static int smbXsrv_session_destructor(struct smbXsrv_session *session) +{ + NTSTATUS status; + + status = smbXsrv_session_logoff(session); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("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->session_table; + uint32_t max_sessions = table->local.highest_id - table->local.lowest_id; + 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 *channels = NULL; + NTSTATUS status; + + if (table->local.num_sessions >= 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->connection = conn; + + 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; + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + + global->connection_dialect = conn->smb2.server.dialect; + + global->session_wire_id = id; + + session->local_id = global->session_global_id; + + key = smbXsrv_session_local_id_to_key(session->local_id, key_buf); + + local_rec = dbwrap_fetch_locked(table->local.db_ctx, + session, key); + 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; + + global->num_channels = 1; + channels = talloc_zero_array(global, + struct smbXsrv_channel_global0, + global->num_channels); + if (channels == NULL) { + TALLOC_FREE(session); + return NT_STATUS_NO_MEMORY; + } + global->channels = channels; + + channels[0].server_id = messaging_server_id(conn->msg_ctx); + channels[0].local_address = tsocket_address_string(conn->local_address, + channels); + if (channels[0].local_address == NULL) { + TALLOC_FREE(session); + return NT_STATUS_NO_MEMORY; + } + channels[0].remote_address = tsocket_address_string(conn->remote_address, + channels); + if (channels[0].remote_address == NULL) { + TALLOC_FREE(session); + return NT_STATUS_NO_MEMORY; + } + channels[0].remote_name = talloc_strdup(channels, conn->remote_hostname); + if (channels[0].remote_name == NULL) { + TALLOC_FREE(session); + return NT_STATUS_NO_MEMORY; + } + channels[0].signing_key = data_blob_null; + + 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(conn, + global); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0,("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(10)) { + struct smbXsrv_sessionB session_blob; + + ZERO_STRUCT(session_blob); + session_blob.version = SMBXSRV_VERSION_0; + session_blob.info.info0 = session; + + DEBUG(10,("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_update(struct smbXsrv_session *session) +{ + struct smbXsrv_session_table *table = session->table; + NTSTATUS status; + uint8_t key_buf[SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE]; + TDB_DATA key; + + if (session->global->db_rec != NULL) { + DEBUG(0, ("smbXsrv_session_update(0x%08x): " + "Called with db_rec != NULL'\n", + session->global->session_global_id)); + return NT_STATUS_INTERNAL_ERROR; + } + + key = smbXsrv_session_global_id_to_key( + session->global->session_global_id, + key_buf); + + session->global->db_rec = dbwrap_fetch_locked(table->global.db_ctx, + session->global, key); + if (session->global->db_rec == NULL) { + DEBUG(0, ("smbXsrv_session_update(0x%08x): " + "Failed to lock global key '%s'\n", + session->global->session_global_id, + hex_encode_talloc(talloc_tos(), key.dptr, + key.dsize))); + return NT_STATUS_INTERNAL_DB_ERROR; + } + + status = smbXsrv_session_global_store(session->connection, + session->global); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0,("smbXsrv_session_update: " + "global_id (0x%08x) store failed - %s\n", + session->global->session_global_id, + nt_errstr(status))); + return status; + } + + if (DEBUGLVL(10)) { + struct smbXsrv_sessionB session_blob; + + ZERO_STRUCT(session_blob); + session_blob.version = SMBXSRV_VERSION_0; + session_blob.info.info0 = session; + + DEBUG(10,("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_logoff(struct smbXsrv_session *session) +{ + struct smbXsrv_session_table *table; + struct db_record *local_rec = NULL; + struct db_record *global_rec = NULL; + struct smbXsrv_connection *conn; + NTSTATUS status; + NTSTATUS error = NT_STATUS_OK; + + if (session->table == NULL) { + return NT_STATUS_OK; + } + + table = session->table; + session->table = NULL; + + conn = session->connection; + session->connection = NULL; + session->status = NT_STATUS_USER_SESSION_DELETED; + + global_rec = session->global->db_rec; + session->global->db_rec = NULL; + if (global_rec == NULL) { + uint8_t key_buf[SMBXSRV_SESSION_GLOBAL_TDB_KEY_SIZE]; + TDB_DATA key; + + key = smbXsrv_session_global_id_to_key( + session->global->session_global_id, + key_buf); + + global_rec = dbwrap_fetch_locked(table->global.db_ctx, + session->global, key); + if (global_rec == NULL) { + DEBUG(0, ("smbXsrv_session_logoff(0x%08x): " + "Failed to lock global key '%s'\n", + session->global->session_global_id, + hex_encode_talloc(global_rec, key.dptr, + key.dsize))); + 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); + + DEBUG(0, ("smbXsrv_session_logoff(0x%08x): " + "failed to delete global key '%s': %s\n", + session->global->session_global_id, + hex_encode_talloc(global_rec, key.dptr, + key.dsize), + nt_errstr(status))); + error = status; + } + } + TALLOC_FREE(global_rec); + + local_rec = session->db_rec; + if (local_rec == NULL) { + uint8_t key_buf[SMBXSRV_SESSION_LOCAL_TDB_KEY_SIZE]; + TDB_DATA key; + + key = smbXsrv_session_local_id_to_key(session->local_id, + key_buf); + + local_rec = dbwrap_fetch_locked(table->local.db_ctx, + session, key); + if (local_rec == NULL) { + DEBUG(0, ("smbXsrv_session_logoff(0x%08x): " + "Failed to lock local key '%s'\n", + session->global->session_global_id, + hex_encode_talloc(local_rec, key.dptr, + key.dsize))); + 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); + + DEBUG(0, ("smbXsrv_session_logoff(0x%08x): " + "failed to delete local key '%s': %s\n", + session->global->session_global_id, + hex_encode_talloc(local_rec, key.dptr, + key.dsize), + nt_errstr(status))); + error = status; + } + table->local.num_sessions -= 1; + } + if (session->db_rec == NULL) { + TALLOC_FREE(local_rec); + } + session->db_rec = NULL; + + if (session->compat) { + file_close_user(conn->sconn, session->compat->vuid); + invalidate_vuid(conn->sconn, session->compat->vuid); + session->compat = 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_connection *conn) +{ + struct smbXsrv_session_table *table = conn->session_table; + struct smbXsrv_session_logoff_all_state state; + NTSTATUS status; + int count = 0; + + if (table == NULL) { + DEBUG(10, ("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)) { + DEBUG(0, ("smbXsrv_session_logoff_all: " + "dbwrap_traverse() failed: %s\n", + nt_errstr(status))); + return status; + } + + if (!NT_STATUS_IS_OK(state.first_status)) { + DEBUG(0, ("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_logoff(session); + if (!NT_STATUS_IS_OK(status)) { + if (NT_STATUS_IS_OK(state->first_status)) { + state->first_status = status; + } + state->errors++; + return 0; + } + + return 0; +} + +NTSTATUS smb1srv_session_table_init(struct smbXsrv_connection *conn) +{ + /* + * Allow a range from 1..65534. + */ + return smbXsrv_session_table_init(conn, 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->session_table; + uint32_t local_id = vuid; + + return smbXsrv_session_local_lookup(table, local_id, now, session); +} + +NTSTATUS smb2srv_session_table_init(struct smbXsrv_connection *conn) +{ + /* + * For now use the same range as SMB1. + * + * Allow a range from 1..65534. + */ + return smbXsrv_session_table_init(conn, 1, UINT16_MAX - 1); +} + +NTSTATUS smb2srv_session_lookup(struct smbXsrv_connection *conn, + uint64_t session_id, NTTIME now, + struct smbXsrv_session **session) +{ + struct smbXsrv_session_table *table = conn->session_table; + 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, local_id, now, session); +} |