diff options
Diffstat (limited to 'source3/lib/eventlog/eventlog.c')
| -rw-r--r-- | source3/lib/eventlog/eventlog.c | 960 |
1 files changed, 960 insertions, 0 deletions
diff --git a/source3/lib/eventlog/eventlog.c b/source3/lib/eventlog/eventlog.c new file mode 100644 index 0000000000..f83c4fc3b8 --- /dev/null +++ b/source3/lib/eventlog/eventlog.c @@ -0,0 +1,960 @@ +/* + * Unix SMB/CIFS implementation. + * Eventlog utility routines + * Copyright (C) Marcin Krzysztof Porwit 2005, + * Copyright (C) Brian Moran 2005. + * Copyright (C) Gerald (Jerry) Carter 2005. + * Copyright (C) Guenther Deschner 2009. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "includes.h" + +/* maintain a list of open eventlog tdbs with reference counts */ + +static ELOG_TDB *open_elog_list; + +/******************************************************************** + Init an Eventlog TDB, and return it. If null, something bad + happened. +********************************************************************/ + +TDB_CONTEXT *elog_init_tdb( char *tdbfilename ) +{ + TDB_CONTEXT *tdb; + + DEBUG(10,("elog_init_tdb: Initializing eventlog tdb (%s)\n", + tdbfilename)); + + tdb = tdb_open_log( tdbfilename, 0, TDB_DEFAULT, + O_RDWR|O_CREAT|O_TRUNC, 0660 ); + + if ( !tdb ) { + DEBUG( 0, ( "Can't open tdb for [%s]\n", tdbfilename ) ); + return NULL; + } + + /* initialize with defaults, copy real values in here from registry */ + + tdb_store_int32( tdb, EVT_OLDEST_ENTRY, 1 ); + tdb_store_int32( tdb, EVT_NEXT_RECORD, 1 ); + tdb_store_int32( tdb, EVT_MAXSIZE, 0x80000 ); + tdb_store_int32( tdb, EVT_RETENTION, 0x93A80 ); + + tdb_store_int32( tdb, EVT_VERSION, EVENTLOG_DATABASE_VERSION_V1 ); + + return tdb; +} + +/******************************************************************** + make the tdb file name for an event log, given destination buffer + and size. Caller must free memory. +********************************************************************/ + +char *elog_tdbname(TALLOC_CTX *ctx, const char *name ) +{ + char *path = talloc_asprintf(ctx, "%s/%s.tdb", + state_path("eventlog"), + name); + if (!path) { + return NULL; + } + strlower_m(path); + return path; +} + + +/******************************************************************** + this function is used to count up the number of bytes in a + particular TDB +********************************************************************/ + +struct trav_size_struct { + int size; + int rec_count; +}; + +static int eventlog_tdb_size_fn( TDB_CONTEXT * tdb, TDB_DATA key, TDB_DATA data, + void *state ) +{ + struct trav_size_struct *tsize = (struct trav_size_struct *)state; + + tsize->size += data.dsize; + tsize->rec_count++; + + return 0; +} + +/******************************************************************** + returns the size of the eventlog, and if MaxSize is a non-null + ptr, puts the MaxSize there. This is purely a way not to have yet + another function that solely reads the maxsize of the eventlog. + Yeah, that's it. +********************************************************************/ + +int elog_tdb_size( TDB_CONTEXT * tdb, int *MaxSize, int *Retention ) +{ + struct trav_size_struct tsize; + + if ( !tdb ) + return 0; + + ZERO_STRUCT( tsize ); + + tdb_traverse( tdb, eventlog_tdb_size_fn, &tsize ); + + if ( MaxSize != NULL ) { + *MaxSize = tdb_fetch_int32( tdb, EVT_MAXSIZE ); + } + + if ( Retention != NULL ) { + *Retention = tdb_fetch_int32( tdb, EVT_RETENTION ); + } + + DEBUG( 1, + ( "eventlog size: [%d] for [%d] records\n", tsize.size, + tsize.rec_count ) ); + return tsize.size; +} + +/******************************************************************** + Discard early event logs until we have enough for 'needed' bytes... + NO checking done beforehand to see that we actually need to do + this, and it's going to pluck records one-by-one. So, it's best + to determine that this needs to be done before doing it. + + Setting whack_by_date to True indicates that eventlogs falling + outside of the retention range need to go... + + return True if we made enough room to accommodate needed bytes +********************************************************************/ + +static bool make_way_for_eventlogs( TDB_CONTEXT * the_tdb, int32_t needed, + bool whack_by_date ) +{ + int32_t start_record, i, new_start; + int32_t end_record; + int32_t reclen, tresv1, trecnum, timegen, timewr; + int nbytes, len, Retention, MaxSize; + TDB_DATA key, ret; + time_t current_time, exp_time; + + /* discard some eventlogs */ + + /* read eventlogs from oldest_entry -- there can't be any discontinuity in recnos, + although records not necessarily guaranteed to have successive times */ + /* */ + + /* lock */ + tdb_lock_bystring_with_timeout( the_tdb, EVT_NEXT_RECORD, 1 ); + /* read */ + end_record = tdb_fetch_int32( the_tdb, EVT_NEXT_RECORD ); + start_record = tdb_fetch_int32( the_tdb, EVT_OLDEST_ENTRY ); + Retention = tdb_fetch_int32( the_tdb, EVT_RETENTION ); + MaxSize = tdb_fetch_int32( the_tdb, EVT_MAXSIZE ); + + time( ¤t_time ); + + /* calculate ... */ + exp_time = current_time - Retention; /* discard older than exp_time */ + + /* todo - check for sanity in next_record */ + nbytes = 0; + + DEBUG( 3, + ( "MaxSize [%d] Retention [%d] Current Time [%u] exp_time [%u]\n", + MaxSize, Retention, (unsigned int)current_time, (unsigned int)exp_time ) ); + DEBUG( 3, + ( "Start Record [%u] End Record [%u]\n", + (unsigned int)start_record, + (unsigned int)end_record )); + + for ( i = start_record; i < end_record; i++ ) { + /* read a record, add the amt to nbytes */ + key.dsize = sizeof(int32_t); + key.dptr = (unsigned char *)&i; + ret = tdb_fetch( the_tdb, key ); + if ( ret.dsize == 0 ) { + DEBUG( 8, + ( "Can't find a record for the key, record [%d]\n", + i ) ); + tdb_unlock_bystring( the_tdb, EVT_NEXT_RECORD ); + return False; + } + nbytes += ret.dsize; /* note this includes overhead */ + + len = tdb_unpack( ret.dptr, ret.dsize, "ddddd", &reclen, + &tresv1, &trecnum, &timegen, &timewr ); + if (len == -1) { + DEBUG( 10,("make_way_for_eventlogs: tdb_unpack failed.\n")); + tdb_unlock_bystring( the_tdb, EVT_NEXT_RECORD ); + SAFE_FREE( ret.dptr ); + return False; + } + + DEBUG( 8, + ( "read record %u, record size is [%d], total so far [%d]\n", + (unsigned int)i, reclen, nbytes ) ); + + SAFE_FREE( ret.dptr ); + + /* note that other servers may just stop writing records when the size limit + is reached, and there are no records older than 'retention'. This doesn't + like a very useful thing to do, so instead we whack (as in sleeps with the + fishes) just enough records to fit the what we need. This behavior could + be changed to 'match', if the need arises. */ + + if ( !whack_by_date && ( nbytes >= needed ) ) + break; /* done */ + if ( whack_by_date && ( timegen >= exp_time ) ) + break; /* done */ + } + + DEBUG( 3, + ( "nbytes [%d] needed [%d] start_record is [%u], should be set to [%u]\n", + nbytes, needed, (unsigned int)start_record, (unsigned int)i ) ); + /* todo - remove eventlog entries here and set starting record to start_record... */ + new_start = i; + if ( start_record != new_start ) { + for ( i = start_record; i < new_start; i++ ) { + key.dsize = sizeof(int32_t); + key.dptr = (unsigned char *)&i; + tdb_delete( the_tdb, key ); + } + + tdb_store_int32( the_tdb, EVT_OLDEST_ENTRY, new_start ); + } + tdb_unlock_bystring( the_tdb, EVT_NEXT_RECORD ); + return True; +} + +/******************************************************************** + some hygiene for an eventlog - see how big it is, and then + calculate how many bytes we need to remove +********************************************************************/ + +bool prune_eventlog( TDB_CONTEXT * tdb ) +{ + int MaxSize, Retention, CalcdSize; + + if ( !tdb ) { + DEBUG( 4, ( "No eventlog tdb handle\n" ) ); + return False; + } + + CalcdSize = elog_tdb_size( tdb, &MaxSize, &Retention ); + DEBUG( 3, + ( "Calculated size [%d] MaxSize [%d]\n", CalcdSize, + MaxSize ) ); + + if ( CalcdSize > MaxSize ) { + return make_way_for_eventlogs( tdb, CalcdSize - MaxSize, + False ); + } + + return make_way_for_eventlogs( tdb, 0, True ); +} + +/******************************************************************** +********************************************************************/ + +static bool can_write_to_eventlog( TDB_CONTEXT * tdb, int32_t needed ) +{ + int calcd_size; + int MaxSize, Retention; + + /* see if we can write to the eventlog -- do a policy enforcement */ + if ( !tdb ) + return False; /* tdb is null, so we can't write to it */ + + + if ( needed < 0 ) + return False; + MaxSize = 0; + Retention = 0; + + calcd_size = elog_tdb_size( tdb, &MaxSize, &Retention ); + + if ( calcd_size <= MaxSize ) + return True; /* you betcha */ + if ( calcd_size + needed < MaxSize ) + return True; + + if ( Retention == 0xffffffff ) { + return False; /* see msdn - we can't write no room, discard */ + } + /* + note don't have to test, but always good to show intent, in case changes needed + later + */ + + if ( Retention == 0x00000000 ) { + /* discard record(s) */ + /* todo - decide when to remove a bunch vs. just what we need... */ + return make_way_for_eventlogs( tdb, calcd_size - MaxSize, + True ); + } + + return make_way_for_eventlogs( tdb, calcd_size - MaxSize, False ); +} + +/******************************************************************* +*******************************************************************/ + +ELOG_TDB *elog_open_tdb( const char *logname, bool force_clear, bool read_only ) +{ + TDB_CONTEXT *tdb = NULL; + uint32_t vers_id; + ELOG_TDB *ptr; + char *tdbpath = NULL; + ELOG_TDB *tdb_node = NULL; + char *eventlogdir; + TALLOC_CTX *ctx = talloc_tos(); + + /* check for invalid options */ + + if (force_clear && read_only) { + DEBUG(1,("elog_open_tdb: Invalid flags\n")); + return NULL; + } + + /* first see if we have an open context */ + + for ( ptr=open_elog_list; ptr; ptr=ptr->next ) { + if ( strequal( ptr->name, logname ) ) { + ptr->ref_count++; + + /* trick to alow clearing of the eventlog tdb. + The force_clear flag should imply that someone + has done a force close. So make sure the tdb + is NULL. If this is a normal open, then just + return the existing reference */ + + if ( force_clear ) { + SMB_ASSERT( ptr->tdb == NULL ); + break; + } + else + return ptr; + } + } + + /* make sure that the eventlog dir exists */ + + eventlogdir = state_path( "eventlog" ); + if ( !directory_exist( eventlogdir ) ) + mkdir( eventlogdir, 0755 ); + + /* get the path on disk */ + + tdbpath = elog_tdbname(ctx, logname); + if (!tdbpath) { + return NULL; + } + + DEBUG(7,("elog_open_tdb: Opening %s...(force_clear == %s)\n", + tdbpath, force_clear?"True":"False" )); + + /* the tdb wasn't already open or this is a forced clear open */ + + if ( !force_clear ) { + + tdb = tdb_open_log( tdbpath, 0, TDB_DEFAULT, read_only ? O_RDONLY : O_RDWR , 0 ); + if ( tdb ) { + vers_id = tdb_fetch_int32( tdb, EVT_VERSION ); + + if ( vers_id != EVENTLOG_DATABASE_VERSION_V1 ) { + DEBUG(1,("elog_open_tdb: Invalid version [%d] on file [%s].\n", + vers_id, tdbpath)); + tdb_close( tdb ); + tdb = elog_init_tdb( tdbpath ); + } + } + } + + if ( !tdb ) + tdb = elog_init_tdb( tdbpath ); + + /* if we got a valid context, then add it to the list */ + + if ( tdb ) { + /* on a forced clear, just reset the tdb context if we already + have an open entry in the list */ + + if ( ptr ) { + ptr->tdb = tdb; + return ptr; + } + + if ( !(tdb_node = TALLOC_ZERO_P( NULL, ELOG_TDB)) ) { + DEBUG(0,("elog_open_tdb: talloc() failure!\n")); + tdb_close( tdb ); + return NULL; + } + + tdb_node->name = talloc_strdup( tdb_node, logname ); + tdb_node->tdb = tdb; + tdb_node->ref_count = 1; + + DLIST_ADD( open_elog_list, tdb_node ); + } + + return tdb_node; +} + +/******************************************************************* + Wrapper to handle reference counts to the tdb +*******************************************************************/ + +int elog_close_tdb( ELOG_TDB *etdb, bool force_close ) +{ + TDB_CONTEXT *tdb; + + if ( !etdb ) + return 0; + + etdb->ref_count--; + + SMB_ASSERT( etdb->ref_count >= 0 ); + + if ( etdb->ref_count == 0 ) { + tdb = etdb->tdb; + DLIST_REMOVE( open_elog_list, etdb ); + TALLOC_FREE( etdb ); + return tdb_close( tdb ); + } + + if ( force_close ) { + tdb = etdb->tdb; + etdb->tdb = NULL; + return tdb_close( tdb ); + } + + return 0; +} + +/******************************************************************** + Note that it's a pretty good idea to initialize the Eventlog_entry + structure to zero's before calling parse_logentry on an batch of + lines that may resolve to a record. ALSO, it's a good idea to + remove any linefeeds (that's EOL to you and me) on the lines + going in. +********************************************************************/ + +bool parse_logentry( TALLOC_CTX *mem_ctx, char *line, struct eventlog_Record_tdb *entry, bool * eor ) +{ + char *start = NULL, *stop = NULL; + + start = line; + + /* empty line signyfiying record delimeter, or we're at the end of the buffer */ + if ( start == NULL || strlen( start ) == 0 ) { + DEBUG( 6, + ( "parse_logentry: found end-of-record indicator.\n" ) ); + *eor = True; + return True; + } + if ( !( stop = strchr( line, ':' ) ) ) { + return False; + } + + DEBUG( 6, ( "parse_logentry: trying to parse [%s].\n", line ) ); + + if ( 0 == strncmp( start, "LEN", stop - start ) ) { + /* This will get recomputed later anyway -- probably not necessary */ + entry->size = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "RS1", stop - start ) ) { + /* For now all these reserved entries seem to have the same value, + which can be hardcoded to int(1699505740) for now */ + entry->reserved = talloc_strdup(mem_ctx, "eLfL"); + } else if ( 0 == strncmp( start, "RCN", stop - start ) ) { + entry->record_number = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "TMG", stop - start ) ) { + entry->time_generated = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "TMW", stop - start ) ) { + entry->time_written = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "EID", stop - start ) ) { + entry->event_id = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "ETP", stop - start ) ) { + if ( strstr( start, "ERROR" ) ) { + entry->event_type = EVENTLOG_ERROR_TYPE; + } else if ( strstr( start, "WARNING" ) ) { + entry->event_type = EVENTLOG_WARNING_TYPE; + } else if ( strstr( start, "INFO" ) ) { + entry->event_type = EVENTLOG_INFORMATION_TYPE; + } else if ( strstr( start, "AUDIT_SUCCESS" ) ) { + entry->event_type = EVENTLOG_AUDIT_SUCCESS; + } else if ( strstr( start, "AUDIT_FAILURE" ) ) { + entry->event_type = EVENTLOG_AUDIT_FAILURE; + } else if ( strstr( start, "SUCCESS" ) ) { + entry->event_type = EVENTLOG_SUCCESS; + } else { + /* some other eventlog type -- currently not defined in MSDN docs, so error out */ + return False; + } + } + +/* + else if(0 == strncmp(start, "NST", stop - start)) + { + entry->num_of_strings = atoi(stop + 1); + } +*/ + else if ( 0 == strncmp( start, "ECT", stop - start ) ) { + entry->event_category = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "RS2", stop - start ) ) { + entry->reserved_flags = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "CRN", stop - start ) ) { + entry->closing_record_number = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "USL", stop - start ) ) { + entry->sid_length = atoi( stop + 1 ); + } else if ( 0 == strncmp( start, "SRC", stop - start ) ) { + stop++; + while ( isspace( stop[0] ) ) { + stop++; + } + entry->source_name_len = strlen_m_term(stop); + entry->source_name = talloc_strdup(mem_ctx, stop); + if (entry->source_name_len == (uint32_t)-1 || + entry->source_name == NULL) { + return false; + } + } else if ( 0 == strncmp( start, "SRN", stop - start ) ) { + stop++; + while ( isspace( stop[0] ) ) { + stop++; + } + entry->computer_name_len = strlen_m_term(stop); + entry->computer_name = talloc_strdup(mem_ctx, stop); + if (entry->computer_name_len == (uint32_t)-1 || + entry->computer_name == NULL) { + return false; + } + } else if ( 0 == strncmp( start, "SID", stop - start ) ) { + smb_ucs2_t *dummy = NULL; + stop++; + while ( isspace( stop[0] ) ) { + stop++; + } + entry->sid_length = rpcstr_push_talloc(mem_ctx, + &dummy, + stop); + if (entry->sid_length == (uint32_t)-1) { + return false; + } + entry->sid = data_blob_talloc(mem_ctx, dummy, entry->sid_length); + if (entry->sid.data == NULL) { + return false; + } + } else if ( 0 == strncmp( start, "STR", stop - start ) ) { + size_t tmp_len; + int num_of_strings; + /* skip past initial ":" */ + stop++; + /* now skip any other leading whitespace */ + while ( isspace(stop[0])) { + stop++; + } + tmp_len = strlen_m_term(stop); + if (tmp_len == (size_t)-1) { + return false; + } + num_of_strings = entry->num_of_strings; + if (!add_string_to_array(mem_ctx, stop, &entry->strings, + &num_of_strings)) { + return false; + } + if (num_of_strings > 0xffff) { + return false; + } + entry->num_of_strings = num_of_strings; + entry->strings_len += tmp_len; + } else if ( 0 == strncmp( start, "DAT", stop - start ) ) { + /* skip past initial ":" */ + stop++; + /* now skip any other leading whitespace */ + while ( isspace( stop[0] ) ) { + stop++; + } + entry->data_length = strlen_m(stop); + entry->data = data_blob_talloc(mem_ctx, stop, entry->data_length); + if (!entry->data.data) { + return false; + } + } else { + /* some other eventlog entry -- not implemented, so dropping on the floor */ + DEBUG( 10, ( "Unknown entry [%s]. Ignoring.\n", line ) ); + /* For now return true so that we can keep on parsing this mess. Eventually + we will return False here. */ + return true; + } + return true; +} + +/******************************************************************* + calculate the correct fields etc for an eventlog entry +*******************************************************************/ + +size_t fixup_eventlog_record_tdb(struct eventlog_Record_tdb *r) +{ + size_t size = 56; /* static size of integers before buffers start */ + + r->source_name_len = strlen_m_term(r->source_name) * 2; + r->computer_name_len = strlen_m_term(r->computer_name) * 2; + r->strings_len = ndr_size_string_array(r->strings, + r->num_of_strings, LIBNDR_FLAG_STR_NULLTERM) * 2; + + /* fix up the eventlog entry structure as necessary */ + r->sid_padding = ( ( 4 - ( ( r->source_name_len + r->computer_name_len ) % 4 ) ) % 4 ); + r->padding = ( 4 - ( ( r->strings_len + r->data_length ) % 4 ) ) % 4; + + if (r->sid_length == 0) { + /* Should not pad to a DWORD boundary for writing out the sid if there is + no SID, so just propagate the padding to pad the data */ + r->padding += r->sid_padding; + r->sid_padding = 0; + } + + size += r->source_name_len; + size += r->computer_name_len; + size += r->sid_padding; + size += r->sid_length; + size += r->strings_len; + size += r->data_length; + size += r->padding; + /* need another copy of length at the end of the data */ + size += sizeof(r->size); + + r->size = size; + + return size; +} + + +/******************************************************************** + ********************************************************************/ + +struct eventlog_Record_tdb *evlog_pull_record_tdb(TALLOC_CTX *mem_ctx, + TDB_CONTEXT *tdb, + uint32_t record_number) +{ + struct eventlog_Record_tdb *r; + TDB_DATA data, key; + + int32_t srecno; + enum ndr_err_code ndr_err; + DATA_BLOB blob; + + srecno = record_number; + key.dptr = (unsigned char *)&srecno; + key.dsize = sizeof(int32_t); + + data = tdb_fetch(tdb, key); + if (data.dsize == 0) { + DEBUG(8,("evlog_pull_record_tdb: " + "Can't find a record for the key, record %d\n", + record_number)); + return NULL; + } + + r = talloc_zero(mem_ctx, struct eventlog_Record_tdb); + if (!r) { + goto done; + } + + blob = data_blob_const(data.dptr, data.dsize); + + ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, NULL, r, + (ndr_pull_flags_fn_t)ndr_pull_eventlog_Record_tdb); + + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + DEBUG(10,("evlog_pull_record_tdb: failed to decode record %d\n", + record_number)); + TALLOC_FREE(r); + goto done; + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(eventlog_Record_tdb, r); + } + + DEBUG(10,("evlog_pull_record_tdb: retrieved entry for record %d\n", + record_number)); + done: + SAFE_FREE(data.dptr); + + return r; +} + +/******************************************************************** + ********************************************************************/ + +struct EVENTLOGRECORD *evlog_pull_record(TALLOC_CTX *mem_ctx, + TDB_CONTEXT *tdb, + uint32_t record_number) +{ + struct eventlog_Record_tdb *t; + struct EVENTLOGRECORD *r; + NTSTATUS status; + + r = talloc_zero(mem_ctx, struct EVENTLOGRECORD); + if (!r) { + return NULL; + } + + t = evlog_pull_record_tdb(r, tdb, record_number); + if (!t) { + talloc_free(r); + return NULL; + } + + status = evlog_tdb_entry_to_evt_entry(r, t, r); + if (!NT_STATUS_IS_OK(status)) { + talloc_free(r); + return NULL; + } + + r->Length = r->Length2 = ndr_size_EVENTLOGRECORD(r, NULL, 0); + + return r; +} + +/******************************************************************** + write an eventlog entry. Note that we have to lock, read next + eventlog, increment, write, write the record, unlock + + coming into this, ee has the eventlog record, and the auxilliary date + (computer name, etc.) filled into the other structure. Before packing + into a record, this routine will calc the appropriate padding, etc., + and then blast out the record in a form that can be read back in + ********************************************************************/ + +NTSTATUS evlog_push_record_tdb(TALLOC_CTX *mem_ctx, + TDB_CONTEXT *tdb, + struct eventlog_Record_tdb *r, + uint32_t *record_number) +{ + TDB_DATA kbuf, ebuf; + DATA_BLOB blob; + enum ndr_err_code ndr_err; + int ret; + + if (!r) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (!can_write_to_eventlog(tdb, r->size)) { + return NT_STATUS_EVENTLOG_CANT_START; + } + + /* need to read the record number and insert it into the entry here */ + + /* lock */ + ret = tdb_lock_bystring_with_timeout(tdb, EVT_NEXT_RECORD, 1); + if (ret == -1) { + return NT_STATUS_LOCK_NOT_GRANTED; + } + + /* read */ + r->record_number = tdb_fetch_int32(tdb, EVT_NEXT_RECORD); + + ndr_err = ndr_push_struct_blob(&blob, mem_ctx, NULL, r, + (ndr_push_flags_fn_t)ndr_push_eventlog_Record_tdb); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + tdb_unlock_bystring(tdb, EVT_NEXT_RECORD); + return ndr_map_error2ntstatus(ndr_err); + } + + /* increment the record count */ + + kbuf.dsize = sizeof(int32_t); + kbuf.dptr = (uint8_t *)&r->record_number; + + ebuf.dsize = blob.length; + ebuf.dptr = blob.data; + + ret = tdb_store(tdb, kbuf, ebuf, 0); + if (ret == -1) { + tdb_unlock_bystring(tdb, EVT_NEXT_RECORD); + return NT_STATUS_EVENTLOG_FILE_CORRUPT; + } + + ret = tdb_store_int32(tdb, EVT_NEXT_RECORD, r->record_number + 1); + if (ret == -1) { + tdb_unlock_bystring(tdb, EVT_NEXT_RECORD); + return NT_STATUS_EVENTLOG_FILE_CORRUPT; + } + tdb_unlock_bystring(tdb, EVT_NEXT_RECORD); + + if (record_number) { + *record_number = r->record_number; + } + + return NT_STATUS_OK; +} + +/******************************************************************** + ********************************************************************/ + +NTSTATUS evlog_push_record(TALLOC_CTX *mem_ctx, + TDB_CONTEXT *tdb, + struct EVENTLOGRECORD *r, + uint32_t *record_number) +{ + struct eventlog_Record_tdb *t; + NTSTATUS status; + + t = talloc_zero(mem_ctx, struct eventlog_Record_tdb); + if (!t) { + return NT_STATUS_NO_MEMORY; + } + + status = evlog_evt_entry_to_tdb_entry(t, r, t); + if (!NT_STATUS_IS_OK(status)) { + talloc_free(t); + return status; + } + + status = evlog_push_record_tdb(mem_ctx, tdb, t, record_number); + talloc_free(t); + + return status; +} + +/******************************************************************** + ********************************************************************/ + +NTSTATUS evlog_evt_entry_to_tdb_entry(TALLOC_CTX *mem_ctx, + const struct EVENTLOGRECORD *e, + struct eventlog_Record_tdb *t) +{ + uint32_t i; + + ZERO_STRUCTP(t); + + t->size = e->Length; + t->reserved = e->Reserved; + t->record_number = e->RecordNumber; + t->time_generated = e->TimeGenerated; + t->time_written = e->TimeWritten; + t->event_id = e->EventID; + t->event_type = e->EventType; + t->num_of_strings = e->NumStrings; + t->event_category = e->EventCategory; + t->reserved_flags = e->ReservedFlags; + t->closing_record_number = e->ClosingRecordNumber; + + t->stringoffset = e->StringOffset; + t->sid_length = e->UserSidLength; + t->sid_offset = e->UserSidOffset; + t->data_length = e->DataLength; + t->data_offset = e->DataOffset; + + t->source_name_len = 2 * strlen_m_term(e->SourceName); + t->source_name = talloc_strdup(mem_ctx, e->SourceName); + NT_STATUS_HAVE_NO_MEMORY(t->source_name); + + t->computer_name_len = 2 * strlen_m_term(e->Computername); + t->computer_name = talloc_strdup(mem_ctx, e->Computername); + NT_STATUS_HAVE_NO_MEMORY(t->computer_name); + + /* t->sid_padding; */ + if (e->UserSidLength > 0) { + const char *sid_str = NULL; + smb_ucs2_t *dummy = NULL; + sid_str = sid_string_talloc(mem_ctx, &e->UserSid); + t->sid_length = rpcstr_push_talloc(mem_ctx, &dummy, sid_str); + if (t->sid_length == -1) { + return NT_STATUS_NO_MEMORY; + } + t->sid = data_blob_talloc(mem_ctx, (uint8_t *)dummy, t->sid_length); + NT_STATUS_HAVE_NO_MEMORY(t->sid.data); + } + + t->strings = talloc_array(mem_ctx, const char *, e->NumStrings); + for (i=0; i < e->NumStrings; i++) { + t->strings[i] = talloc_strdup(t->strings, e->Strings[i]); + NT_STATUS_HAVE_NO_MEMORY(t->strings[i]); + } + + t->strings_len = 2 * ndr_size_string_array(t->strings, t->num_of_strings, LIBNDR_FLAG_STR_NULLTERM); + t->data = data_blob_talloc(mem_ctx, e->Data, e->DataLength); + /* t->padding = r->Pad; */ + + return NT_STATUS_OK; +} + +/******************************************************************** + ********************************************************************/ + +NTSTATUS evlog_tdb_entry_to_evt_entry(TALLOC_CTX *mem_ctx, + const struct eventlog_Record_tdb *t, + struct EVENTLOGRECORD *e) +{ + uint32_t i; + + ZERO_STRUCTP(e); + + e->Length = t->size; + e->Reserved = t->reserved; + e->RecordNumber = t->record_number; + e->TimeGenerated = t->time_generated; + e->TimeWritten = t->time_written; + e->EventID = t->event_id; + e->EventType = t->event_type; + e->NumStrings = t->num_of_strings; + e->EventCategory = t->event_category; + e->ReservedFlags = t->reserved_flags; + e->ClosingRecordNumber = t->closing_record_number; + + e->StringOffset = t->stringoffset; + e->UserSidLength = t->sid_length; + e->UserSidOffset = t->sid_offset; + e->DataLength = t->data_length; + e->DataOffset = t->data_offset; + + e->SourceName = talloc_strdup(mem_ctx, t->source_name); + NT_STATUS_HAVE_NO_MEMORY(e->SourceName); + + e->Computername = talloc_strdup(mem_ctx, t->computer_name); + NT_STATUS_HAVE_NO_MEMORY(e->Computername); + + if (t->sid_length > 0) { + const char *sid_str = NULL; + size_t len; + if (!convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX, + t->sid.data, t->sid.length, + (void **)&sid_str, &len, false)) { + return NT_STATUS_INVALID_SID; + } + if (len > 0) { + e->UserSid = *string_sid_talloc(mem_ctx, sid_str); + } + } + + e->Strings = talloc_array(mem_ctx, const char *, t->num_of_strings); + for (i=0; i < t->num_of_strings; i++) { + e->Strings[i] = talloc_strdup(e->Strings, t->strings[i]); + NT_STATUS_HAVE_NO_MEMORY(e->Strings[i]); + } + + e->Data = (uint8_t *)talloc_memdup(mem_ctx, t->data.data, t->data_length); + e->Pad = talloc_strdup(mem_ctx, ""); + NT_STATUS_HAVE_NO_MEMORY(e->Pad); + + e->Length2 = t->size; + + return NT_STATUS_OK; +} |