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authorGünther Deschner <gd@samba.org>2009-04-08 14:29:04 +0200
committerGünther Deschner <gd@samba.org>2009-04-08 19:45:57 +0200
commit98d703a6b7c102db49b6cdc2a57545a90efefabf (patch)
tree288276dc12b1293a61695ed664181ba6aacfaa99 /source3/lib/eventlog
parentbed4f8413435c39e37ea04940a18ee78481db48f (diff)
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s3-eventlog: move rpc_server/srv_eventlog_lib.c out of rpc_server.
Guenther
Diffstat (limited to 'source3/lib/eventlog')
-rw-r--r--source3/lib/eventlog/eventlog.c960
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( &current_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;
+}