1 files changed, 267 insertions, 0 deletions
diff --git a/source3/smbd/conn.c b/source3/smbd/conn.c
new file mode 100644
index 0000000..27a4d27
--- /dev/null
+++ b/source3/smbd/conn.c
@@ -0,0 +1,267 @@
+/*
+   Unix SMB/CIFS implementation.
+   Manage connections_struct structures
+   Copyright (C) Andrew Tridgell 1998
+   Copyright (C) Alexander Bokovoy 2002
+   Copyright (C) Jeremy Allison 2010
+
+   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 "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "lib/util/bitmap.h"
+
+static void conn_free_internal(connection_struct *conn);
+
+/****************************************************************************
+ * Remove a conn struct from conn->sconn->connections
+ * if not already done.
+****************************************************************************/
+
+static int conn_struct_destructor(connection_struct *conn)
+{
+        if (conn->sconn != NULL) {
+		DLIST_REMOVE(conn->sconn->connections, conn);
+		SMB_ASSERT(conn->sconn->num_connections > 0);
+		conn->sconn->num_connections--;
+		conn->sconn = NULL;
+	}
+	conn_free_internal(conn);
+	return 0;
+}
+
+/****************************************************************************
+ Return the number of open connections.
+****************************************************************************/
+
+int conn_num_open(struct smbd_server_connection *sconn)
+{
+	return sconn->num_connections;
+}
+
+/****************************************************************************
+ Check if a snum is in use.
+****************************************************************************/
+
+bool conn_snum_used(struct smbd_server_connection *sconn,
+		    int snum)
+{
+	struct connection_struct *conn;
+
+	for (conn=sconn->connections; conn; conn=conn->next) {
+		if (conn->params->service == snum) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/****************************************************************************
+ Find first available connection slot, starting from a random position.
+ The randomisation stops problems with the server dying and clients
+ thinking the server is still available.
+****************************************************************************/
+
+connection_struct *conn_new(struct smbd_server_connection *sconn)
+{
+	connection_struct *conn = NULL;
+
+	conn = talloc_zero(NULL, connection_struct);
+	if (conn == NULL) {
+		DBG_ERR("talloc_zero failed\n");
+		return NULL;
+	}
+	conn->params = talloc(conn, struct share_params);
+	if (conn->params == NULL) {
+		DBG_ERR("talloc_zero failed\n");
+		TALLOC_FREE(conn);
+		return NULL;
+	}
+	conn->vuid_cache = talloc_zero(conn, struct vuid_cache);
+	if (conn->vuid_cache == NULL) {
+		DBG_ERR("talloc_zero failed\n");
+		TALLOC_FREE(conn);
+		return NULL;
+	}
+	conn->connectpath = talloc_strdup(conn, "");
+	if (conn->connectpath == NULL) {
+		DBG_ERR("talloc_zero failed\n");
+		TALLOC_FREE(conn);
+		return NULL;
+	}
+	conn->cwd_fsp = talloc_zero(conn, struct files_struct);
+	if (conn->cwd_fsp == NULL) {
+		DBG_ERR("talloc_zero failed\n");
+		TALLOC_FREE(conn);
+		return NULL;
+	}
+	conn->cwd_fsp->fsp_name = synthetic_smb_fname(conn->cwd_fsp,
+						      ".",
+						      NULL,
+						      NULL,
+						      0,
+						      0);
+	if (conn->cwd_fsp->fsp_name == NULL) {
+		TALLOC_FREE(conn);
+		return NULL;
+	}
+	conn->cwd_fsp->fh = fd_handle_create(conn->cwd_fsp);
+	if (conn->cwd_fsp->fh == NULL) {
+		DBG_ERR("talloc_zero failed\n");
+		TALLOC_FREE(conn);
+		return NULL;
+	}
+	conn->sconn = sconn;
+	conn->force_group_gid = (gid_t)-1;
+	fsp_set_fd(conn->cwd_fsp, -1);
+	conn->cwd_fsp->fnum = FNUM_FIELD_INVALID;
+	conn->cwd_fsp->conn = conn;
+
+	DLIST_ADD(sconn->connections, conn);
+	sconn->num_connections++;
+
+	/*
+	 * Catches the case where someone forgets to call
+	 * conn_free().
+	 */
+	talloc_set_destructor(conn, conn_struct_destructor);
+	return conn;
+}
+
+/****************************************************************************
+ Clear a vuid out of the connection's vuid cache
+****************************************************************************/
+
+static void conn_clear_vuid_cache(connection_struct *conn, uint64_t vuid)
+{
+	int i;
+
+	for (i=0; i<VUID_CACHE_SIZE; i++) {
+		struct vuid_cache_entry *ent;
+
+		ent = &conn->vuid_cache->array[i];
+
+		if (ent->vuid == vuid) {
+			ent->vuid = UID_FIELD_INVALID;
+			/*
+			 * We need to keep conn->session_info around
+			 * if it's equal to ent->session_info as a SMBulogoff
+			 * is often followed by a SMBtdis (with an invalid
+			 * vuid). The debug code (or regular code in
+			 * vfs_full_audit) wants to refer to the
+			 * conn->session_info pointer to print debug
+			 * statements. Theoretically this is a bug,
+			 * as once the vuid is gone the session_info
+			 * on the conn struct isn't valid any more,
+			 * but there's enough code that assumes
+			 * conn->session_info is never null that
+			 * it's easier to hold onto the old pointer
+			 * until we get a new sessionsetupX.
+			 * As everything is hung off the
+			 * conn pointer as a talloc context we're not
+			 * leaking memory here. See bug #6315. JRA.
+			 */
+			if (conn->session_info == ent->session_info) {
+				ent->session_info = NULL;
+			} else {
+				TALLOC_FREE(ent->session_info);
+			}
+			ent->read_only = False;
+			ent->share_access = 0;
+		}
+	}
+}
+
+/****************************************************************************
+ Clear a vuid out of the validity cache, and as the 'owner' of a connection.
+
+ Called from invalidate_vuid()
+****************************************************************************/
+
+void conn_clear_vuid_caches(struct smbd_server_connection *sconn, uint64_t vuid)
+{
+	connection_struct *conn;
+
+	for (conn=sconn->connections; conn;conn=conn->next) {
+		if (conn->vuid == vuid) {
+			conn->vuid = UID_FIELD_INVALID;
+		}
+		conn_clear_vuid_cache(conn, vuid);
+	}
+}
+
+/****************************************************************************
+ Free a conn structure - internal part.
+****************************************************************************/
+
+static void conn_free_internal(connection_struct *conn)
+{
+	vfs_handle_struct *handle = NULL, *thandle = NULL;
+	struct trans_state *state = NULL;
+
+	/* Free vfs_connection_struct */
+	handle = conn->vfs_handles;
+	while(handle) {
+		thandle = handle->next;
+		DLIST_REMOVE(conn->vfs_handles, handle);
+		if (handle->free_data)
+			handle->free_data(&handle->data);
+		handle = thandle;
+	}
+
+	/* Free any pending transactions stored on this conn. */
+	for (state = conn->pending_trans; state; state = state->next) {
+		/* state->setup is a talloc child of state. */
+		SAFE_FREE(state->param);
+		SAFE_FREE(state->data);
+	}
+
+	free_namearray(conn->veto_list);
+	free_namearray(conn->hide_list);
+	free_namearray(conn->veto_oplock_list);
+	free_namearray(conn->aio_write_behind_list);
+
+	ZERO_STRUCTP(conn);
+}
+
+/****************************************************************************
+ Free a conn structure.
+****************************************************************************/
+
+void conn_free(connection_struct *conn)
+{
+	TALLOC_FREE(conn);
+}
+
+/*
+ * Correctly initialize a share with case options.
+ */
+void conn_setup_case_options(connection_struct *conn)
+{
+	int snum = conn->params->service;
+
+	if (lp_case_sensitive(snum) == Auto) {
+		/* We will be setting this per packet. Set to be case
+		* insensitive for now. */
+		conn->case_sensitive = false;
+	} else {
+		conn->case_sensitive = (bool)lp_case_sensitive(snum);
+	}
+
+	conn->case_preserve = lp_preserve_case(snum);
+	conn->short_case_preserve = lp_short_preserve_case(snum);
+}