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-rw-r--r--source4/smbd/service.c339
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diff --git a/source4/smbd/service.c b/source4/smbd/service.c
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+/*
+ Unix SMB/CIFS implementation.
+ service (connection) handling
+ Copyright (C) Andrew Tridgell 1992-2003
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+
+/****************************************************************************
+ Add a home service. Returns the new service number or -1 if fail.
+****************************************************************************/
+int add_home_service(const char *service, const char *username, const char *homedir)
+{
+ int iHomeService;
+
+ if (!service || !homedir)
+ return -1;
+
+ if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0)
+ return -1;
+
+ /*
+ * If this is a winbindd provided username, remove
+ * the domain component before adding the service.
+ * Log a warning if the "path=" parameter does not
+ * include any macros.
+ */
+
+ {
+ const char *p = strchr(service,*lp_winbind_separator());
+
+ /* We only want the 'user' part of the string */
+ if (p) {
+ service = p + 1;
+ }
+ }
+
+ if (!lp_add_home(service, iHomeService, username, homedir)) {
+ return -1;
+ }
+
+ return lp_servicenumber(service);
+
+}
+
+
+/**
+ * Find a service entry. service is always in dos codepage.
+ *
+ * @param service is modified (to canonical form??)
+ **/
+static int find_service(const char *service)
+{
+ int iService;
+
+ iService = lp_servicenumber(service);
+
+ /* now handle the special case of a home directory */
+ if (iService == -1) {
+ char *phome_dir = get_user_home_dir(service);
+
+ if(!phome_dir) {
+ /*
+ * Try mapping the servicename, it may
+ * be a Windows to unix mapped user name.
+ */
+/* REWRITE:
+ if (map_username(service))
+ phome_dir = get_user_home_dir(service);
+*/
+ }
+
+ DEBUG(3,("checking for home directory %s gave %s\n",service,
+ phome_dir?phome_dir:"(NULL)"));
+
+ iService = add_home_service(service,service /* 'username' */, phome_dir);
+ }
+
+ /* If we still don't have a service, attempt to add it as a printer. */
+ if (iService == -1) {
+ int iPrinterService;
+
+ if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) >= 0) {
+ char *pszTemp;
+
+ DEBUG(3,("checking whether %s is a valid printer name...\n", service));
+ pszTemp = lp_printcapname();
+ if ((pszTemp != NULL) && pcap_printername_ok(service, pszTemp)) {
+ DEBUG(3,("%s is a valid printer name\n", service));
+ DEBUG(3,("adding %s as a printer service\n", service));
+ lp_add_printer(service, iPrinterService);
+ iService = lp_servicenumber(service);
+ if (iService < 0)
+ DEBUG(0,("failed to add %s as a printer service!\n", service));
+ } else {
+ DEBUG(3,("%s is not a valid printer name\n", service));
+ }
+ }
+ }
+
+ /* Check for default vfs service? Unsure whether to implement this */
+ if (iService == -1) {
+ }
+
+ /* just possibly it's a default service? */
+ if (iService == -1) {
+ char *pdefservice = lp_defaultservice();
+ if (pdefservice && *pdefservice &&
+ !strequal(pdefservice,service) &&
+ !strstr(service,"..")) {
+ /*
+ * We need to do a local copy here as lp_defaultservice()
+ * returns one of the rotating lp_string buffers that
+ * could get overwritten by the recursive find_service() call
+ * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
+ */
+ pstring defservice;
+ pstrcpy(defservice, pdefservice);
+ iService = find_service(defservice);
+ if (iService >= 0) {
+ /* REWRITE: all_string_sub(service, "_","/",0); */
+ iService = lp_add_service(service, iService);
+ }
+ }
+ }
+
+ if (iService >= 0 && !VALID_SNUM(iService)) {
+ DEBUG(0,("Invalid snum %d for %s\n",iService, service));
+ iService = -1;
+ }
+
+ if (iService == -1) {
+ DEBUG(3,("find_service() failed to find service %s\n", service));
+ }
+
+ return iService;
+}
+
+
+/****************************************************************************
+ Make a connection, given the snum to connect to, and the vuser of the
+ connecting user if appropriate.
+****************************************************************************/
+static NTSTATUS make_connection_snum(struct request_context *req,
+ int snum, enum ntvfs_type type,
+ DATA_BLOB password,
+ const char *dev)
+{
+ struct tcon_context *conn;
+ NTSTATUS status;
+
+ conn = conn_new(req->smb);
+ if (!conn) {
+ DEBUG(0,("Couldn't find free connection.\n"));
+ return NT_STATUS_INSUFFICIENT_RESOURCES;
+ }
+ req->conn = conn;
+
+ conn->service = snum;
+ conn->type = type;
+
+ /*
+ * New code to check if there's a share security descripter
+ * added from NT server manager. This is done after the
+ * smb.conf checks are done as we need a uid and token. JRA.
+ *
+ */
+
+ if (!share_access_check(req, conn, snum, SA_RIGHT_FILE_WRITE_DATA)) {
+ if (!share_access_check(req, conn, snum, SA_RIGHT_FILE_READ_DATA)) {
+ /* No access, read or write. */
+ DEBUG(0,( "make_connection: connection to %s denied due to security descriptor.\n",
+ lp_servicename(snum)));
+ conn_free(req->smb, conn);
+ return NT_STATUS_ACCESS_DENIED;
+ } else {
+ conn->read_only = True;
+ }
+ }
+
+ /* check number of connections */
+ if (!claim_connection(conn,
+ lp_servicename(SNUM(conn)),
+ lp_max_connections(SNUM(conn)),
+ False,0)) {
+ DEBUG(1,("too many connections - rejected\n"));
+ conn_free(req->smb, conn);
+ return NT_STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ /* init ntvfs function pointers */
+ status = ntvfs_init_connection(req);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("ntvfs_init_connection failed for service %s\n", lp_servicename(SNUM(conn))));
+ conn_free(req->smb, conn);
+ return status;
+ }
+
+ /* Invoke NTVFS connection hook */
+ if (conn->ntvfs_ops->connect) {
+ status = conn->ntvfs_ops->connect(req, lp_servicename(snum));
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("make_connection: NTVFS make connection failed!\n"));
+ conn_free(req->smb, conn);
+ return status;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+/****************************************************************************
+ Make a connection to a service.
+ *
+ * @param service
+****************************************************************************/
+static NTSTATUS make_connection(struct request_context *req,
+ const char *service, DATA_BLOB password,
+ const char *dev, uint16 vuid)
+{
+ int snum;
+ enum ntvfs_type type;
+ const char *type_str;
+
+ /* the service might be of the form \\SERVER\SHARE. Should we put
+ the server name we get from this somewhere? */
+ if (strncmp(service, "\\\\", 2) == 0) {
+ char *p = strchr(service+2, '\\');
+ if (p) {
+ service = p + 1;
+ }
+ }
+
+ snum = find_service(service);
+
+ if (snum == -1) {
+ DEBUG(0,("%s couldn't find service %s\n",
+ sub_get_remote_machine(), service));
+ return NT_STATUS_BAD_NETWORK_NAME;
+ }
+
+ /* work out what sort of connection this is */
+ if (strcmp(lp_fstype(snum), "IPC") == 0) {
+ type = NTVFS_IPC;
+ type_str = "IPC";
+ } else if (lp_print_ok(snum)) {
+ type = NTVFS_PRINT;
+ type_str = "LPT:";
+ } else {
+ type = NTVFS_DISK;
+ type_str = "A:";
+ }
+
+ if (strcmp(dev, "?????") != 0 && strcasecmp(type_str, dev) != 0) {
+ /* the client gave us the wrong device type */
+ return NT_STATUS_BAD_DEVICE_TYPE;
+ }
+
+ return make_connection_snum(req, snum, type, password, dev);
+}
+
+/****************************************************************************
+close a cnum
+****************************************************************************/
+void close_cnum(struct tcon_context *conn)
+{
+ DEBUG(3, ("%s (%s) closed connection to service %s\n",
+ sub_get_remote_machine(),conn->smb->socket.client_addr,
+ lp_servicename(SNUM(conn))));
+
+ yield_connection(conn, lp_servicename(SNUM(conn)));
+
+ /* tell the ntvfs backend that we are disconnecting */
+ conn->ntvfs_ops->disconnect(conn);
+
+ conn_free(conn->smb, conn);
+}
+
+
+
+/*
+ backend for tree connect call
+*/
+NTSTATUS tcon_backend(struct request_context *req, union smb_tcon *con)
+{
+ NTSTATUS status;
+
+ /* can only do bare tcon in share level security */
+ if (req->user_ctx == NULL && lp_security() != SEC_SHARE) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (con->generic.level == RAW_TCON_TCON) {
+ DATA_BLOB password;
+ password = data_blob(con->tcon.in.password, strlen(con->tcon.in.password) + 1);
+
+ status = make_connection(req, con->tcon.in.service, password, con->tcon.in.dev, req->user_ctx->vuid);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ con->tcon.out.max_xmit = req->smb->negotiate.max_recv;
+ con->tcon.out.cnum = req->conn->cnum;
+
+ return status;
+ }
+
+ status = make_connection(req, con->tconx.in.path, con->tconx.in.password,
+ con->tconx.in.device, req->user_ctx->vuid);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ con->tconx.out.cnum = req->conn->cnum;
+ con->tconx.out.dev_type = talloc_strdup(req->mem_ctx, req->conn->dev_type);
+ con->tconx.out.fs_type = talloc_strdup(req->mem_ctx, req->conn->fs_type);
+ con->tconx.out.options = SMB_SUPPORT_SEARCH_BITS | (lp_csc_policy(req->conn->service) << 2);
+ if (lp_msdfs_root(req->conn->service) && lp_host_msdfs()) {
+ con->tconx.out.options |= SMB_SHARE_IN_DFS;
+ }
+
+ return status;
+}