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https://github.com/samba-team/samba.git
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8b0783072a
During my initial plans for, and the subsequent discussion of a more
significant change to the API for libsmbclient, I had removed the
AuthDataWithContext usage, in favor of a more generalized planned interface.
When the API returned to its original state, I neglected to reinsert this
code.
Use of an authentication function with the context can be tested using
examples/libsmbclient/testbrowse -C
Derrell
(This used to be commit 38eab68dfb)
613 lines
23 KiB
C
613 lines
23 KiB
C
/*
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Unix SMB/Netbios implementation.
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SMB client library implementation
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Copyright (C) Andrew Tridgell 1998
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Copyright (C) Richard Sharpe 2000, 2002
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Copyright (C) John Terpstra 2000
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Copyright (C) Tom Jansen (Ninja ISD) 2002
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Copyright (C) Derrell Lipman 2003-2008
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Copyright (C) Jeremy Allison 2007, 2008
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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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*/
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#include "includes.h"
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#include "libsmbclient.h"
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#include "libsmb_internal.h"
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/*
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* Is the logging working / configfile read ?
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*/
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static int SMBC_initialized = 0;
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/*
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* Get a new empty handle to fill in with your own info
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*/
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SMBCCTX *
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smbc_new_context(void)
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{
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SMBCCTX *context;
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/*
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* All newly added context fields should be placed in
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* SMBC_internal_data, not directly in SMBCCTX.
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*/
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context = SMB_MALLOC_P(SMBCCTX);
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if (!context) {
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errno = ENOMEM;
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return NULL;
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}
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ZERO_STRUCTP(context);
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context->internal = SMB_MALLOC_P(struct SMBC_internal_data);
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if (!context->internal) {
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SAFE_FREE(context);
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errno = ENOMEM;
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return NULL;
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}
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/* Initialize the context and establish reasonable defaults */
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ZERO_STRUCTP(context->internal);
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smbc_setDebug(context, 0);
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smbc_setTimeout(context, 20000);
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smbc_setOptionFullTimeNames(context, False);
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smbc_setOptionOpenShareMode(context, SMBC_SHAREMODE_DENY_NONE);
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smbc_setOptionSmbEncryptionLevel(context, SMBC_ENCRYPTLEVEL_NONE);
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smbc_setOptionBrowseMaxLmbCount(context, 3); /* # LMBs to query */
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smbc_setOptionUrlEncodeReaddirEntries(context, False);
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smbc_setOptionOneSharePerServer(context, False);
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smbc_setFunctionAuthData(context, SMBC_get_auth_data);
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smbc_setFunctionCheckServer(context, SMBC_check_server);
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smbc_setFunctionRemoveUnusedServer(context, SMBC_remove_unused_server);
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smbc_setOptionUserData(context, NULL);
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smbc_setFunctionAddCachedServer(context, SMBC_add_cached_server);
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smbc_setFunctionGetCachedServer(context, SMBC_get_cached_server);
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smbc_setFunctionRemoveCachedServer(context, SMBC_remove_cached_server);
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smbc_setFunctionPurgeCachedServers(context, SMBC_purge_cached_servers);
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smbc_setFunctionOpen(context, SMBC_open_ctx);
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smbc_setFunctionCreat(context, SMBC_creat_ctx);
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smbc_setFunctionRead(context, SMBC_read_ctx);
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smbc_setFunctionWrite(context, SMBC_write_ctx);
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smbc_setFunctionClose(context, SMBC_close_ctx);
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smbc_setFunctionUnlink(context, SMBC_unlink_ctx);
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smbc_setFunctionRename(context, SMBC_rename_ctx);
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smbc_setFunctionLseek(context, SMBC_lseek_ctx);
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smbc_setFunctionFtruncate(context, SMBC_ftruncate_ctx);
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smbc_setFunctionStat(context, SMBC_stat_ctx);
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smbc_setFunctionFstat(context, SMBC_fstat_ctx);
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smbc_setFunctionOpendir(context, SMBC_opendir_ctx);
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smbc_setFunctionClosedir(context, SMBC_closedir_ctx);
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smbc_setFunctionReaddir(context, SMBC_readdir_ctx);
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smbc_setFunctionGetdents(context, SMBC_getdents_ctx);
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smbc_setFunctionMkdir(context, SMBC_mkdir_ctx);
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smbc_setFunctionRmdir(context, SMBC_rmdir_ctx);
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smbc_setFunctionTelldir(context, SMBC_telldir_ctx);
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smbc_setFunctionLseekdir(context, SMBC_lseekdir_ctx);
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smbc_setFunctionFstatdir(context, SMBC_fstatdir_ctx);
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smbc_setFunctionChmod(context, SMBC_chmod_ctx);
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smbc_setFunctionUtimes(context, SMBC_utimes_ctx);
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smbc_setFunctionSetxattr(context, SMBC_setxattr_ctx);
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smbc_setFunctionGetxattr(context, SMBC_getxattr_ctx);
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smbc_setFunctionRemovexattr(context, SMBC_removexattr_ctx);
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smbc_setFunctionListxattr(context, SMBC_listxattr_ctx);
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smbc_setFunctionOpenPrintJob(context, SMBC_open_print_job_ctx);
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smbc_setFunctionPrintFile(context, SMBC_print_file_ctx);
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smbc_setFunctionListPrintJobs(context, SMBC_list_print_jobs_ctx);
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smbc_setFunctionUnlinkPrintJob(context, SMBC_unlink_print_job_ctx);
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return context;
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}
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/*
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* Free a context
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*
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* Returns 0 on success. Otherwise returns 1, the SMBCCTX is _not_ freed
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* and thus you'll be leaking memory if not handled properly.
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*
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*/
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int
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smbc_free_context(SMBCCTX *context,
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int shutdown_ctx)
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{
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if (!context) {
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errno = EBADF;
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return 1;
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}
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if (shutdown_ctx) {
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SMBCFILE * f;
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DEBUG(1,("Performing aggressive shutdown.\n"));
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f = context->internal->files;
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while (f) {
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smbc_getFunctionClose(context)(context, f);
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f = f->next;
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}
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context->internal->files = NULL;
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/* First try to remove the servers the nice way. */
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if (smbc_getFunctionPurgeCachedServers(context)(context)) {
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SMBCSRV * s;
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SMBCSRV * next;
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DEBUG(1, ("Could not purge all servers, "
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"Nice way shutdown failed.\n"));
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s = context->internal->servers;
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while (s) {
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DEBUG(1, ("Forced shutdown: %p (fd=%d)\n",
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s, s->cli->fd));
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cli_shutdown(s->cli);
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smbc_getFunctionRemoveCachedServer(context)(context,
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s);
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next = s->next;
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DLIST_REMOVE(context->internal->servers, s);
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SAFE_FREE(s);
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s = next;
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}
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context->internal->servers = NULL;
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}
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}
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else {
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/* This is the polite way */
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if (smbc_getFunctionPurgeCachedServers(context)(context)) {
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DEBUG(1, ("Could not purge all servers, "
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"free_context failed.\n"));
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errno = EBUSY;
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return 1;
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}
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if (context->internal->servers) {
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DEBUG(1, ("Active servers in context, "
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"free_context failed.\n"));
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errno = EBUSY;
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return 1;
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}
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if (context->internal->files) {
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DEBUG(1, ("Active files in context, "
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"free_context failed.\n"));
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errno = EBUSY;
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return 1;
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}
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}
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/* Things we have to clean up */
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free(smbc_getWorkgroup(context));
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smbc_setWorkgroup(context, NULL);
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free(smbc_getNetbiosName(context));
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smbc_setNetbiosName(context, NULL);
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free(smbc_getUser(context));
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smbc_setUser(context, NULL);
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DEBUG(3, ("Context %p successfully freed\n", context));
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SAFE_FREE(context);
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return 0;
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}
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/**
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* Deprecated interface. Do not use. Instead, use the various
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* smbc_setOption*() functions or smbc_setFunctionAuthDataWithContext().
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*/
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void
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smbc_option_set(SMBCCTX *context,
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char *option_name,
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... /* option_value */)
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{
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va_list ap;
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union {
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int i;
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bool b;
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smbc_get_auth_data_with_context_fn auth_fn;
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void *v;
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const char *s;
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} option_value;
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va_start(ap, option_name);
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if (strcmp(option_name, "debug_to_stderr") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionDebugToStderr(context, option_value.b);
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} else if (strcmp(option_name, "full_time_names") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionFullTimeNames(context, option_value.b);
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} else if (strcmp(option_name, "open_share_mode") == 0) {
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option_value.i = va_arg(ap, int);
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smbc_setOptionOpenShareMode(context, option_value.i);
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} else if (strcmp(option_name, "auth_function") == 0) {
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option_value.auth_fn =
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va_arg(ap, smbc_get_auth_data_with_context_fn);
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smbc_setFunctionAuthDataWithContext(context, option_value.auth_fn);
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} else if (strcmp(option_name, "user_data") == 0) {
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option_value.v = va_arg(ap, void *);
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smbc_setOptionUserData(context, option_value.v);
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} else if (strcmp(option_name, "smb_encrypt_level") == 0) {
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option_value.s = va_arg(ap, const char *);
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if (strcmp(option_value.s, "none") == 0) {
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smbc_setOptionSmbEncryptionLevel(context,
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SMBC_ENCRYPTLEVEL_NONE);
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} else if (strcmp(option_value.s, "request") == 0) {
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smbc_setOptionSmbEncryptionLevel(context,
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SMBC_ENCRYPTLEVEL_REQUEST);
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} else if (strcmp(option_value.s, "require") == 0) {
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smbc_setOptionSmbEncryptionLevel(context,
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SMBC_ENCRYPTLEVEL_REQUIRE);
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}
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} else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
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option_value.i = va_arg(ap, int);
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smbc_setOptionBrowseMaxLmbCount(context, option_value.i);
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} else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionUrlEncodeReaddirEntries(context, option_value.b);
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} else if (strcmp(option_name, "one_share_per_server") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionOneSharePerServer(context, option_value.b);
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} else if (strcmp(option_name, "use_kerberos") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionUseKerberos(context, option_value.b);
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} else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionFallbackAfterKerberos(context, option_value.b);
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} else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
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option_value.b = (bool) va_arg(ap, int);
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smbc_setOptionNoAutoAnonymousLogin(context, option_value.b);
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}
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va_end(ap);
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}
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/*
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* Deprecated interface. Do not use. Instead, use the various
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* smbc_getOption*() functions.
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*/
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void *
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smbc_option_get(SMBCCTX *context,
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char *option_name)
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{
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if (strcmp(option_name, "debug_stderr") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionDebugToStderr(context);
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#else
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return (void *) smbc_getOptionDebugToStderr(context);
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#endif
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} else if (strcmp(option_name, "full_time_names") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionFullTimeNames(context);
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#else
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return (void *) smbc_getOptionFullTimeNames(context);
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#endif
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} else if (strcmp(option_name, "open_share_mode") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionOpenShareMode(context);
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#else
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return (void *) smbc_getOptionOpenShareMode(context);
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#endif
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} else if (strcmp(option_name, "auth_function") == 0) {
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return (void *) smbc_getFunctionAuthDataWithContext(context);
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} else if (strcmp(option_name, "user_data") == 0) {
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return smbc_getOptionUserData(context);
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} else if (strcmp(option_name, "smb_encrypt_level") == 0) {
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switch(smbc_getOptionSmbEncryptionLevel(context))
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{
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case 0:
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return (void *) "none";
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case 1:
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return (void *) "request";
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case 2:
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return (void *) "require";
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}
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} else if (strcmp(option_name, "smb_encrypt_on") == 0) {
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SMBCSRV *s;
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unsigned int num_servers = 0;
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for (s = context->internal->servers; s; s = s->next) {
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num_servers++;
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if (s->cli->trans_enc_state == NULL) {
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return (void *)false;
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}
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}
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) (bool) (num_servers > 0);
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#else
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return (void *) (bool) (num_servers > 0);
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#endif
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} else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionBrowseMaxLmbCount(context);
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#else
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return (void *) smbc_getOptionBrowseMaxLmbCount(context);
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#endif
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} else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *)(intptr_t) smbc_getOptionUrlEncodeReaddirEntries(context);
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#else
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return (void *) (bool) smbc_getOptionUrlEncodeReaddirEntries(context);
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#endif
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} else if (strcmp(option_name, "one_share_per_server") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionOneSharePerServer(context);
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#else
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return (void *) (bool) smbc_getOptionOneSharePerServer(context);
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#endif
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} else if (strcmp(option_name, "use_kerberos") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionUseKerberos(context);
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#else
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return (void *) (bool) smbc_getOptionUseKerberos(context);
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#endif
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} else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *)(intptr_t) smbc_getOptionFallbackAfterKerberos(context);
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#else
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return (void *) (bool) smbc_getOptionFallbackAfterKerberos(context);
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#endif
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} else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
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#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
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return (void *) (intptr_t) smbc_getOptionNoAutoAnonymousLogin(context);
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#else
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return (void *) (bool) smbc_getOptionNoAutoAnonymousLogin(context);
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#endif
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}
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return NULL;
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}
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/*
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* Initialize the library, etc.
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*
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* We accept a struct containing handle information.
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* valid values for info->debug from 0 to 100,
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* and insist that info->fn must be non-null.
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*/
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SMBCCTX *
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smbc_init_context(SMBCCTX *context)
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{
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int pid;
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char *user = NULL;
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char *home = NULL;
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if (!context) {
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errno = EBADF;
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return NULL;
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}
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/* Do not initialise the same client twice */
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if (context->internal->initialized) {
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return NULL;
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}
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if ((!smbc_getFunctionAuthData(context) &&
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!smbc_getFunctionAuthDataWithContext(context)) ||
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smbc_getDebug(context) < 0 ||
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smbc_getDebug(context) > 100) {
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errno = EINVAL;
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return NULL;
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}
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if (!SMBC_initialized) {
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/*
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* Do some library-wide intializations the first time we get
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* called
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*/
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bool conf_loaded = False;
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TALLOC_CTX *frame = talloc_stackframe();
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load_case_tables();
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setup_logging("libsmbclient", True);
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if (context->internal->debug_stderr) {
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dbf = x_stderr;
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x_setbuf(x_stderr, NULL);
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}
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/* Here we would open the smb.conf file if needed ... */
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lp_set_in_client(True);
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home = getenv("HOME");
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if (home) {
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char *conf = NULL;
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if (asprintf(&conf, "%s/.smb/smb.conf", home) > 0) {
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if (lp_load(conf, True, False, False, True)) {
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conf_loaded = True;
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} else {
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DEBUG(5, ("Could not load config file: %s\n",
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conf));
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}
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SAFE_FREE(conf);
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}
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}
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if (!conf_loaded) {
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/*
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* Well, if that failed, try the get_dyn_CONFIGFILE
|
|
* Which points to the standard locn, and if that
|
|
* fails, silently ignore it and use the internal
|
|
* defaults ...
|
|
*/
|
|
|
|
if (!lp_load(get_dyn_CONFIGFILE(), True, False, False, False)) {
|
|
DEBUG(5, ("Could not load config file: %s\n",
|
|
get_dyn_CONFIGFILE()));
|
|
} else if (home) {
|
|
char *conf;
|
|
/*
|
|
* We loaded the global config file. Now lets
|
|
* load user-specific modifications to the
|
|
* global config.
|
|
*/
|
|
if (asprintf(&conf,
|
|
"%s/.smb/smb.conf.append",
|
|
home) > 0) {
|
|
if (!lp_load(conf, True, False, False, False)) {
|
|
DEBUG(10,
|
|
("Could not append config file: "
|
|
"%s\n",
|
|
conf));
|
|
}
|
|
SAFE_FREE(conf);
|
|
}
|
|
}
|
|
}
|
|
|
|
load_interfaces(); /* Load the list of interfaces ... */
|
|
|
|
reopen_logs(); /* Get logging working ... */
|
|
|
|
/*
|
|
* Block SIGPIPE (from lib/util_sock.c: write())
|
|
* It is not needed and should not stop execution
|
|
*/
|
|
BlockSignals(True, SIGPIPE);
|
|
|
|
/* Done with one-time initialisation */
|
|
SMBC_initialized = 1;
|
|
|
|
TALLOC_FREE(frame);
|
|
}
|
|
|
|
if (!smbc_getUser(context)) {
|
|
/*
|
|
* FIXME: Is this the best way to get the user info?
|
|
*/
|
|
user = getenv("USER");
|
|
/* walk around as "guest" if no username can be found */
|
|
if (!user) {
|
|
user = SMB_STRDUP("guest");
|
|
} else {
|
|
user = SMB_STRDUP(user);
|
|
}
|
|
|
|
if (!user) {
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
|
|
smbc_setUser(context, user);
|
|
}
|
|
|
|
if (!smbc_getNetbiosName(context)) {
|
|
/*
|
|
* We try to get our netbios name from the config. If that
|
|
* fails we fall back on constructing our netbios name from
|
|
* our hostname etc
|
|
*/
|
|
char *netbios_name;
|
|
if (global_myname()) {
|
|
netbios_name = SMB_STRDUP(global_myname());
|
|
} else {
|
|
/*
|
|
* Hmmm, I want to get hostname as well, but I am too
|
|
* lazy for the moment
|
|
*/
|
|
pid = sys_getpid();
|
|
netbios_name = (char *)SMB_MALLOC(17);
|
|
if (!netbios_name) {
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
slprintf(netbios_name, 16,
|
|
"smbc%s%d", smbc_getUser(context), pid);
|
|
}
|
|
|
|
if (!netbios_name) {
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
|
|
smbc_setNetbiosName(context, netbios_name);
|
|
}
|
|
|
|
DEBUG(1, ("Using netbios name %s.\n", smbc_getNetbiosName(context)));
|
|
|
|
if (!smbc_getWorkgroup(context)) {
|
|
char *workgroup;
|
|
|
|
if (lp_workgroup()) {
|
|
workgroup = SMB_STRDUP(lp_workgroup());
|
|
}
|
|
else {
|
|
/* TODO: Think about a decent default workgroup */
|
|
workgroup = SMB_STRDUP("samba");
|
|
}
|
|
|
|
if (!workgroup) {
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
|
|
smbc_setWorkgroup(context, workgroup);
|
|
}
|
|
|
|
DEBUG(1, ("Using workgroup %s.\n", smbc_getWorkgroup(context)));
|
|
|
|
/* shortest timeout is 1 second */
|
|
if (smbc_getTimeout(context) > 0 && smbc_getTimeout(context) < 1000)
|
|
smbc_setTimeout(context, 1000);
|
|
|
|
/*
|
|
* FIXME: Should we check the function pointers here?
|
|
*/
|
|
|
|
context->internal->initialized = True;
|
|
|
|
return context;
|
|
}
|
|
|
|
|
|
/* Return the verion of samba, and thus libsmbclient */
|
|
const char *
|
|
smbc_version(void)
|
|
{
|
|
return samba_version_string();
|
|
}
|
|
|
|
|