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Unix SMB/CIFS implementation.
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Low-level sessionid.tdb access functions
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Copyright (C) Volker Lendecke 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "system/filesys.h"
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static struct db_context *session_db_ctx(void)
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static struct db_context *session_db_ctx_ptr;
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if (session_db_ctx_ptr != NULL) {
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return session_db_ctx_ptr;
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session_db_ctx_ptr = db_open(NULL, lock_path("sessionid.tdb"), 0,
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TDB_CLEAR_IF_FIRST|TDB_DEFAULT|TDB_INCOMPATIBLE_HASH,
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O_RDWR | O_CREAT, 0644);
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return session_db_ctx_ptr;
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bool sessionid_init(void)
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if (session_db_ctx() == NULL) {
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DEBUG(1,("session_init: failed to open sessionid tdb\n"));
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struct db_record *sessionid_fetch_record(TALLOC_CTX *mem_ctx, const char *key)
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struct db_context *db;
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db = session_db_ctx();
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return db->fetch_locked(db, mem_ctx, string_term_tdb_data(key));
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struct sessionid_traverse_state {
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int (*fn)(struct db_record *rec, const char *key,
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struct sessionid *session, void *private_data);
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static int sessionid_traverse_fn(struct db_record *rec, void *private_data)
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struct sessionid_traverse_state *state =
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(struct sessionid_traverse_state *)private_data;
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struct sessionid session;
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if ((rec->key.dptr[rec->key.dsize-1] != '\0')
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|| (rec->value.dsize != sizeof(struct sessionid))) {
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DEBUG(1, ("Found invalid record in sessionid.tdb\n"));
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memcpy(&session, rec->value.dptr, sizeof(session));
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return state->fn(rec, (char *)rec->key.dptr, &session,
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int sessionid_traverse(int (*fn)(struct db_record *rec, const char *key,
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struct sessionid *session,
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struct db_context *db;
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struct sessionid_traverse_state state;
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db = session_db_ctx();
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state.private_data = private_data;
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return db->traverse(db, sessionid_traverse_fn, &state);
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struct sessionid_traverse_read_state {
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int (*fn)(const char *key, struct sessionid *session,
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static int sessionid_traverse_read_fn(struct db_record *rec,
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struct sessionid_traverse_read_state *state =
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(struct sessionid_traverse_read_state *)private_data;
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struct sessionid session;
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if ((rec->key.dptr[rec->key.dsize-1] != '\0')
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|| (rec->value.dsize != sizeof(struct sessionid))) {
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DEBUG(1, ("Found invalid record in sessionid.tdb\n"));
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memcpy(&session, rec->value.dptr, sizeof(session));
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return state->fn((char *)rec->key.dptr, &session,
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state->private_data);
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int sessionid_traverse_read(int (*fn)(const char *key,
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struct sessionid *session,
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struct db_context *db;
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struct sessionid_traverse_read_state state;
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db = session_db_ctx();
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state.private_data = private_data;
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return db->traverse(db, sessionid_traverse_read_fn, &state);