string substitution functions
Copyright (C) Andrew Tridgell 1992-2000
Copyright (C) Gerald Carter 2006
-
+
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
+ 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "secrets.h"
-extern struct current_user current_user;
+static char *alloc_sub_basic(const char *smb_name, const char *domain_name,
+ const char *str);
-fstring local_machine="";
-fstring remote_arch="UNKNOWN";
userdom_struct current_user_info;
fstring remote_proto="UNKNOWN";
-static fstring remote_machine;
-static fstring smb_user_name;
-
-/**
+/**
* Set the 'local' machine name
* @param local_name the name we are being called
* @param if this is the 'final' name for us, not be be changed again
*/
-void set_local_machine_name(const char* local_name, BOOL perm)
+static char *local_machine;
+
+void free_local_machine_name(void)
{
- static BOOL already_perm = False;
- fstring tmp_local_machine;
+ SAFE_FREE(local_machine);
+}
- fstrcpy(tmp_local_machine,local_name);
+bool set_local_machine_name(const char *local_name, bool perm)
+{
+ static bool already_perm = false;
+ char *tmp_local_machine = NULL;
+ char addr[INET6_ADDRSTRLEN];
+ size_t len;
+
+ tmp_local_machine = SMB_STRDUP(local_name);
+ if (!tmp_local_machine) {
+ return false;
+ }
trim_char(tmp_local_machine,' ',' ');
/*
* Windows NT/2k uses "*SMBSERVER" and XP uses "*SMBSERV"
- * arrggg!!!
+ * arrggg!!!
*/
- if ( strequal(tmp_local_machine, "*SMBSERVER") || strequal(tmp_local_machine, "*SMBSERV") ) {
- fstrcpy( local_machine, client_socket_addr() );
- return;
+ if (strequal(tmp_local_machine, "*SMBSERVER") ||
+ strequal(tmp_local_machine, "*SMBSERV") ) {
+ SAFE_FREE(local_machine);
+ local_machine = SMB_STRDUP(client_socket_addr(get_client_fd(),
+ addr, sizeof(addr)) );
+ SAFE_FREE(tmp_local_machine);
+ return local_machine ? true : false;
}
- if (already_perm)
- return;
+ if (already_perm) {
+ return true;
+ }
+
+ SAFE_FREE(local_machine);
+ len = strlen(tmp_local_machine);
+ local_machine = SMB_CALLOC_ARRAY(char, len+1);
+ if (!local_machine) {
+ SAFE_FREE(tmp_local_machine);
+ return false;
+ }
+ /* alpha_strcpy includes the space for the terminating nul. */
+ alpha_strcpy(local_machine,tmp_local_machine,
+ SAFE_NETBIOS_CHARS,len+1);
+ strlower_m(local_machine);
+ SAFE_FREE(tmp_local_machine);
already_perm = perm;
- alpha_strcpy(local_machine,tmp_local_machine,SAFE_NETBIOS_CHARS,sizeof(local_machine)-1);
- strlower_m(local_machine);
+ return true;
+}
+
+const char *get_local_machine_name(void)
+{
+ if (!local_machine || !*local_machine) {
+ return global_myname();
+ }
+
+ return local_machine;
}
-/**
+/**
* Set the 'remote' machine name
* @param remote_name the name our client wants to be called by
* @param if this is the 'final' name for them, not be be changed again
*/
-void set_remote_machine_name(const char* remote_name, BOOL perm)
-{
- static BOOL already_perm = False;
- fstring tmp_remote_machine;
+static char *remote_machine;
- if (already_perm)
- return;
+bool set_remote_machine_name(const char *remote_name, bool perm)
+{
+ static bool already_perm = False;
+ char *tmp_remote_machine;
+ size_t len;
- already_perm = perm;
+ if (already_perm) {
+ return true;
+ }
- fstrcpy(tmp_remote_machine,remote_name);
+ tmp_remote_machine = SMB_STRDUP(remote_name);
+ if (!tmp_remote_machine) {
+ return false;
+ }
trim_char(tmp_remote_machine,' ',' ');
- alpha_strcpy(remote_machine,tmp_remote_machine,SAFE_NETBIOS_CHARS,sizeof(remote_machine)-1);
+
+ SAFE_FREE(remote_machine);
+ len = strlen(tmp_remote_machine);
+ remote_machine = SMB_CALLOC_ARRAY(char, len+1);
+ if (!remote_machine) {
+ SAFE_FREE(tmp_remote_machine);
+ return false;
+ }
+
+ /* alpha_strcpy includes the space for the terminating nul. */
+ alpha_strcpy(remote_machine,tmp_remote_machine,
+ SAFE_NETBIOS_CHARS,len+1);
strlower_m(remote_machine);
-}
+ SAFE_FREE(tmp_remote_machine);
-const char* get_remote_machine_name(void)
-{
- return remote_machine;
+ already_perm = perm;
+
+ return true;
}
-const char* get_local_machine_name(void)
+const char *get_remote_machine_name(void)
{
- if (!*local_machine) {
- return global_myname();
- }
-
- return local_machine;
+ return remote_machine ? remote_machine : "";
}
/*******************************************************************
Setup the string used by %U substitution.
********************************************************************/
+static char *smb_user_name;
+
void sub_set_smb_name(const char *name)
{
- fstring tmp;
- int len;
- BOOL is_machine_account = False;
+ char *tmp;
+ size_t len;
+ bool is_machine_account = false;
/* don't let anonymous logins override the name */
- if (! *name)
+ if (!name || !*name) {
return;
+ }
+ tmp = SMB_STRDUP(name);
+ if (!tmp) {
+ return;
+ }
+ trim_char(tmp, ' ', ' ');
+ strlower_m(tmp);
- fstrcpy( tmp, name );
- trim_char( tmp, ' ', ' ' );
- strlower_m( tmp );
-
- len = strlen( tmp );
+ len = strlen(tmp);
- if ( len == 0 )
+ if (len == 0) {
+ SAFE_FREE(tmp);
return;
+ }
/* long story but here goes....we have to allow usernames
ending in '$' as they are valid machine account names.
So check for a machine account and re-add the '$'
at the end after the call to alpha_strcpy(). --jerry */
-
- if ( tmp[len-1] == '$' )
+
+ if (tmp[len-1] == '$') {
is_machine_account = True;
-
- alpha_strcpy( smb_user_name, tmp, SAFE_NETBIOS_CHARS, sizeof(smb_user_name)-1 );
+ }
+
+ SAFE_FREE(smb_user_name);
+ smb_user_name = SMB_CALLOC_ARRAY(char, len+1);
+ if (!smb_user_name) {
+ SAFE_FREE(tmp);
+ return;
+ }
- if ( is_machine_account ) {
- len = strlen( smb_user_name );
+ /* alpha_strcpy includes the space for the terminating nul. */
+ alpha_strcpy(smb_user_name, tmp,
+ SAFE_NETBIOS_CHARS,
+ len+1);
+
+ SAFE_FREE(tmp);
+
+ if (is_machine_account) {
+ len = strlen(smb_user_name);
smb_user_name[len-1] = '$';
}
}
-char* sub_get_smb_name( void )
+static const char *get_smb_user_name(void)
{
- return smb_user_name;
+ return smb_user_name ? smb_user_name : "";
}
/*******************************************************************
Setup the strings used by substitutions. Called per packet. Ensure
%U name is set correctly also.
+
+ smb_name must be sanitized by alpha_strcpy
********************************************************************/
-void set_current_user_info(const userdom_struct *pcui)
+void set_current_user_info(const char *smb_name, const char *unix_name,
+ const char *domain)
{
- current_user_info = *pcui;
+ fstrcpy(current_user_info.smb_name, smb_name);
+ fstrcpy(current_user_info.unix_name, unix_name);
+ fstrcpy(current_user_info.domain, domain);
+
/* The following is safe as current_user_info.smb_name
- * has already been sanitised in register_vuid. */
- fstrcpy(smb_user_name, current_user_info.smb_name);
+ * has already been sanitised in register_existing_vuid. */
+
+ sub_set_smb_name(current_user_info.smb_name);
}
/*******************************************************************
- return the current active user name
+ Return the current active user name.
*******************************************************************/
-const char* get_current_username( void )
+const char *get_current_username(void)
{
- if ( current_user_info.smb_name[0] == '\0' )
- return smb_user_name;
+ if (current_user_info.smb_name[0] == '\0' ) {
+ return get_smb_user_name();
+ }
- return current_user_info.smb_name;
+ return current_user_info.smb_name;
}
/*******************************************************************
r = p + 3;
copylen = q - r;
-
+
/* reserve space for use later add %$() chars */
if ( (envname = (char *)SMB_MALLOC(copylen + 1 + 4)) == NULL ) {
return NULL;
}
-
+
strncpy(envname,r,copylen);
envname[copylen] = '\0';
envname[copylen] = '\0';
r = realloc_string_sub(str, envname, envval);
SAFE_FREE(envname);
-
+
return r;
}
static char *longvar_domainsid( void )
{
- DOM_SID sid;
+ struct dom_sid sid;
+ fstring tmp;
char *sid_string;
-
+
if ( !secrets_fetch_domain_sid( lp_workgroup(), &sid ) ) {
return NULL;
}
-
- sid_string = SMB_STRDUP( sid_string_static( &sid ) );
-
+
+ sid_string = SMB_STRDUP( sid_to_fstring( tmp, &sid ) );
+
if ( !sid_string ) {
DEBUG(0,("longvar_domainsid: failed to dup SID string!\n"));
}
-
+
return sid_string;
}
char* (*fn)( void );
};
-struct api_longvar longvar_table[] = {
+static struct api_longvar longvar_table[] = {
{ "DomainSID", longvar_domainsid },
{ NULL, NULL }
};
static char *get_longvar_val( const char *varname )
{
int i;
-
+
DEBUG(7,("get_longvar_val: expanding variable [%s]\n", varname));
-
+
for ( i=0; longvar_table[i].name; i++ ) {
if ( strequal( longvar_table[i].name, varname ) ) {
return longvar_table[i].fn();
}
}
-
+
return NULL;
}
varname[copylen] = '\0';
r = realloc_string_sub(str, varname, value);
SAFE_FREE( value );
-
+
/* skip over the %(varname) */
-
+
return r;
}
Added this to implement %p (NIS auto-map version of %H)
*******************************************************************/
-static char *automount_path(const char *user_name)
+static const char *automount_path(const char *user_name)
{
- static pstring server_path;
+ TALLOC_CTX *ctx = talloc_tos();
+ const char *server_path;
/* use the passwd entry as the default */
/* this will be the default if WITH_AUTOMOUNT is not used or fails */
- pstrcpy(server_path, get_user_home_dir(user_name));
+ server_path = talloc_strdup(ctx, get_user_home_dir(ctx, user_name));
+ if (!server_path) {
+ return "";
+ }
#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
if (lp_nis_home_map()) {
const char *home_path_start;
- const char *automount_value = automount_lookup(user_name);
+ char *automount_value = automount_lookup(ctx, user_name);
- if(strlen(automount_value) > 0) {
+ if(automount_value && strlen(automount_value) > 0) {
home_path_start = strchr_m(automount_value,':');
if (home_path_start != NULL) {
- DEBUG(5, ("NIS lookup succeeded. Home path is: %s\n",
- home_path_start?(home_path_start+1):""));
- pstrcpy(server_path, home_path_start+1);
+ DEBUG(5, ("NIS lookup succeeded. "
+ "Home path is: %s\n",
+ home_path_start ?
+ (home_path_start+1):""));
+ server_path = talloc_strdup(ctx,
+ home_path_start+1);
+ if (!server_path) {
+ server_path = "";
+ }
}
} else {
- /* NIS key lookup failed: default to user home directory from password file */
- DEBUG(5, ("NIS lookup failed. Using Home path from passwd file. Home path is: %s\n", server_path ));
+ /* NIS key lookup failed: default to
+ * user home directory from password file */
+ DEBUG(5, ("NIS lookup failed. Using Home path from "
+ "passwd file. Home path is: %s\n", server_path ));
}
}
#endif
DEBUG(4,("Home server path: %s\n", server_path));
-
return server_path;
}
static const char *automount_server(const char *user_name)
{
- static pstring server_name;
- const char *local_machine_name = get_local_machine_name();
+ TALLOC_CTX *ctx = talloc_tos();
+ const char *server_name;
+ const char *local_machine_name = get_local_machine_name();
/* use the local machine name as the default */
/* this will be the default if WITH_AUTOMOUNT is not used or fails */
- if (local_machine_name && *local_machine_name)
- pstrcpy(server_name, local_machine_name);
- else
- pstrcpy(server_name, global_myname());
-
-#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
+ if (local_machine_name && *local_machine_name) {
+ server_name = talloc_strdup(ctx, local_machine_name);
+ } else {
+ server_name = talloc_strdup(ctx, global_myname());
+ }
+
+ if (!server_name) {
+ return "";
+ }
+#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
if (lp_nis_home_map()) {
- int home_server_len;
- char *automount_value = automount_lookup(user_name);
- home_server_len = strcspn(automount_value,":");
- DEBUG(5, ("NIS lookup succeeded. Home server length: %d\n",home_server_len));
- if (home_server_len > sizeof(pstring))
- home_server_len = sizeof(pstring);
- strncpy(server_name, automount_value, home_server_len);
- server_name[home_server_len] = '\0';
+ char *p;
+ char *srv;
+ char *automount_value = automount_lookup(ctx, user_name);
+ if (!automount_value) {
+ return "";
+ }
+ srv = talloc_strdup(ctx, automount_value);
+ if (!srv) {
+ return "";
+ }
+ p = strchr_m(srv, ':');
+ if (!p) {
+ return "";
+ }
+ *p = '\0';
+ server_name = srv;
+ DEBUG(5, ("NIS lookup succeeded. Home server %s\n",
+ server_name));
}
#endif
DEBUG(4,("Home server: %s\n", server_name));
-
return server_name;
}
char *str, size_t len)
{
char *s;
-
+
if ( (s = alloc_sub_basic( smb_name, domain_name, str )) != NULL ) {
strncpy( str, s, len );
}
-
+
SAFE_FREE( s );
-
}
/****************************************************************************
const char *domain_name, const char *str)
{
char *a, *t;
-
+
if ( (a = alloc_sub_basic(smb_name, domain_name, str)) == NULL ) {
return NULL;
}
/****************************************************************************
****************************************************************************/
-char *alloc_sub_basic(const char *smb_name, const char *domain_name,
- const char *str)
+static char *alloc_sub_basic(const char *smb_name, const char *domain_name,
+ const char *str)
{
char *b, *p, *s, *r, *a_string;
- fstring pidstr;
- struct passwd *pass;
+ fstring pidstr, vnnstr;
+ char addr[INET6_ADDRSTRLEN];
const char *local_machine_name = get_local_machine_name();
+ TALLOC_CTX *tmp_ctx = NULL;
/* workaround to prevent a crash while looking at bug #687 */
-
+
if (!str) {
DEBUG(0,("alloc_sub_basic: NULL source string! This should not happen\n"));
return NULL;
}
-
+
a_string = SMB_STRDUP(str);
if (a_string == NULL) {
DEBUG(0, ("alloc_sub_basic: Out of memory!\n"));
return NULL;
}
-
+
+ tmp_ctx = talloc_stackframe();
+
for (b = s = a_string; (p = strchr_m(s, '%')); s = a_string + (p - b)) {
r = NULL;
b = a_string;
-
+
switch (*(p+1)) {
case 'U' :
- r = strdup_lower(smb_name);
+ r = strlower_talloc(tmp_ctx, smb_name);
if (r == NULL) {
goto error;
}
a_string = realloc_string_sub(a_string, "%U", r);
break;
- case 'G' :
- r = SMB_STRDUP(smb_name);
+ case 'G' : {
+ struct passwd *pass;
+ r = talloc_strdup(tmp_ctx, smb_name);
if (r == NULL) {
goto error;
}
- if ((pass = Get_Pwnam(r))!=NULL) {
- a_string = realloc_string_sub(a_string, "%G", gidtoname(pass->pw_gid));
- }
+ pass = Get_Pwnam_alloc(tmp_ctx, r);
+ if (pass != NULL) {
+ a_string = realloc_string_sub(
+ a_string, "%G",
+ gidtoname(pass->pw_gid));
+ }
+ TALLOC_FREE(pass);
break;
+ }
case 'D' :
- r = strdup_upper(domain_name);
+ r = strupper_talloc(tmp_ctx, domain_name);
if (r == NULL) {
goto error;
}
a_string = realloc_string_sub(a_string, "%D", r);
break;
- case 'I' :
- a_string = realloc_string_sub(a_string, "%I", client_addr());
+ case 'I' : {
+ int offset = 0;
+ client_addr(get_client_fd(), addr, sizeof(addr));
+ if (strnequal(addr,"::ffff:",7)) {
+ offset = 7;
+ }
+ a_string = realloc_string_sub(a_string, "%I",
+ addr + offset);
break;
+ }
case 'i':
- a_string = realloc_string_sub( a_string, "%i", client_socket_addr() );
+ a_string = realloc_string_sub( a_string, "%i",
+ client_socket_addr(get_client_fd(), addr, sizeof(addr)) );
break;
case 'L' :
if ( StrnCaseCmp(p, "%LOGONSERVER%", strlen("%LOGONSERVER%")) == 0 ) {
a_string = realloc_string_sub(a_string, "%N", automount_server(smb_name));
break;
case 'M' :
- a_string = realloc_string_sub(a_string, "%M", client_name());
+ a_string = realloc_string_sub(a_string, "%M", client_name(get_client_fd()));
break;
case 'R' :
a_string = realloc_string_sub(a_string, "%R", remote_proto);
break;
case 'T' :
- a_string = realloc_string_sub(a_string, "%T", current_timestring(False));
+ a_string = realloc_string_sub(a_string, "%T", current_timestring(tmp_ctx, False));
break;
case 'a' :
- a_string = realloc_string_sub(a_string, "%a", remote_arch);
+ a_string = realloc_string_sub(a_string, "%a",
+ get_remote_arch_str());
break;
case 'd' :
slprintf(pidstr,sizeof(pidstr)-1, "%d",(int)sys_getpid());
a_string = realloc_string_sub(a_string, "%h", myhostname());
break;
case 'm' :
- a_string = realloc_string_sub(a_string, "%m", remote_machine);
+ a_string = realloc_string_sub(a_string, "%m",
+ remote_machine
+ ? remote_machine
+ : "");
break;
case 'v' :
- a_string = realloc_string_sub(a_string, "%v", SAMBA_VERSION_STRING);
+ a_string = realloc_string_sub(a_string, "%v", samba_version_string());
break;
case 'w' :
a_string = realloc_string_sub(a_string, "%w", lp_winbind_separator());
case '(':
a_string = realloc_expand_longvar( a_string, p );
break;
+ case 'V' :
+ slprintf(vnnstr,sizeof(vnnstr)-1, "%u", get_my_vnn());
+ a_string = realloc_string_sub(a_string, "%V", vnnstr);
+ break;
default:
break;
}
p++;
- SAFE_FREE(r);
-
- if ( !a_string ) {
- return NULL;
+ TALLOC_FREE(r);
+
+ if (a_string == NULL) {
+ goto done;
}
}
- return a_string;
+ goto done;
error:
SAFE_FREE(a_string);
- return NULL;
+
+done:
+ TALLOC_FREE(tmp_ctx);
+ return a_string;
}
/****************************************************************************
DEBUG(0, ("talloc_sub_specified: Out of memory!\n"));
goto done;
}
-
+
for (b = s = a_string; (p = strchr_m(s, '%')); s = a_string + (p - b)) {
-
+
b = a_string;
-
+
switch (*(p+1)) {
case 'U' :
a_string = talloc_string_sub(
/****************************************************************************
****************************************************************************/
-char *alloc_sub_advanced(const char *servicename, const char *user,
+static char *alloc_sub_advanced(const char *servicename, const char *user,
const char *connectpath, gid_t gid,
const char *smb_name, const char *domain_name,
const char *str)
{
char *a_string, *ret_string;
- char *b, *p, *s, *h;
+ char *b, *p, *s;
a_string = SMB_STRDUP(str);
if (a_string == NULL) {
DEBUG(0, ("alloc_sub_advanced: Out of memory!\n"));
return NULL;
}
-
+
for (b = s = a_string; (p = strchr_m(s, '%')); s = a_string + (p - b)) {
-
+
b = a_string;
-
+
switch (*(p+1)) {
case 'N' :
a_string = realloc_string_sub(a_string, "%N", automount_server(user));
break;
- case 'H':
- if ((h = get_user_home_dir(user)))
+ case 'H': {
+ char *h;
+ if ((h = get_user_home_dir(talloc_tos(), user)))
a_string = realloc_string_sub(a_string, "%H", h);
+ TALLOC_FREE(h);
break;
+ }
case 'P':
a_string = realloc_string_sub(a_string, "%P", connectpath);
break;
case 'u':
a_string = realloc_string_sub(a_string, "%u", user);
break;
-
+
/* Patch from jkf@soton.ac.uk Left the %N (NIS
* server name) in standard_sub_basic as it is
* a feature for logon servers, hence uses the
a_string = realloc_string_sub(a_string, "%p",
automount_path(servicename));
break;
-
+
default:
break;
}
return ret_string;
}
-void standard_sub_advanced(const char *servicename, const char *user,
- const char *connectpath, gid_t gid,
+/*
+ * This obviously is inefficient and needs to be merged into
+ * alloc_sub_advanced...
+ */
+
+char *talloc_sub_advanced(TALLOC_CTX *mem_ctx,
+ const char *servicename, const char *user,
+ const char *connectpath, gid_t gid,
+ const char *smb_name, const char *domain_name,
+ const char *str)
+{
+ char *a, *t;
+
+ if (!(a = alloc_sub_advanced(servicename, user, connectpath, gid,
+ smb_name, domain_name, str))) {
+ return NULL;
+ }
+ t = talloc_strdup(mem_ctx, a);
+ SAFE_FREE(a);
+ return t;
+}
+
+
+void standard_sub_advanced(const char *servicename, const char *user,
+ const char *connectpath, gid_t gid,
const char *smb_name, const char *domain_name,
char *str, size_t len)
{
char *s;
-
+
s = alloc_sub_advanced(servicename, user, connectpath,
gid, smb_name, domain_name, str);
SAFE_FREE( s );
}
}
+
+/****************************************************************************
+ Do some standard substitutions in a string.
+****************************************************************************/
+
+char *standard_sub_conn(TALLOC_CTX *ctx, connection_struct *conn, const char *str)
+{
+ return talloc_sub_advanced(ctx,
+ lp_servicename(SNUM(conn)),
+ conn->server_info->unix_name,
+ conn->connectpath,
+ conn->server_info->utok.gid,
+ get_smb_user_name(),
+ "",
+ str);
+}
git.samba.org / samba.git / blobdiff