1 files changed, 363 insertions, 0 deletions
diff --git a/libraries/libldap/os-local.c b/libraries/libldap/os-local.c
new file mode 100644
index 0000000..9f7e48b
--- /dev/null
+++ b/libraries/libldap/os-local.c
@@ -0,0 +1,363 @@
+/* os-local.c -- platform-specific domain socket code */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved. 
+ */
+/* Portions (C) Copyright PADL Software Pty Ltd. 1999
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that this notice is preserved
+ * and that due credit is given to PADL Software Pty Ltd. This software
+ * is provided ``as is'' without express or implied warranty.  
+ */
+
+#include "portable.h"
+
+#ifdef LDAP_PF_LOCAL
+
+#include <stdio.h>
+
+#include <ac/stdlib.h>
+
+#include <ac/errno.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif /* HAVE_IO_H */
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#include "ldap-int.h"
+#include "ldap_defaults.h"
+
+#ifdef LDAP_DEBUG
+
+#define oslocal_debug(ld,fmt,arg1,arg2,arg3) \
+do { \
+	ldap_log_printf(ld, LDAP_DEBUG_TRACE, fmt, arg1, arg2, arg3); \
+} while(0)
+
+#else
+
+#define oslocal_debug(ld,fmt,arg1,arg2,arg3) ((void)0)
+
+#endif /* LDAP_DEBUG */
+
+static void
+ldap_pvt_set_errno(int err)
+{
+	errno = err;
+}
+
+static int
+ldap_pvt_ndelay_on(LDAP *ld, int fd)
+{
+	oslocal_debug(ld, "ldap_ndelay_on: %d\n",fd,0,0);
+	return ber_pvt_socket_set_nonblock( fd, 1 );
+}
+   
+static int
+ldap_pvt_ndelay_off(LDAP *ld, int fd)
+{
+	oslocal_debug(ld, "ldap_ndelay_off: %d\n",fd,0,0);
+	return ber_pvt_socket_set_nonblock( fd, 0 );
+}
+
+static ber_socket_t
+ldap_pvt_socket(LDAP *ld)
+{
+	ber_socket_t s = socket(PF_LOCAL, SOCK_STREAM, 0);
+	oslocal_debug(ld, "ldap_new_socket: %d\n",s,0,0);
+#ifdef FD_CLOEXEC
+	fcntl(s, F_SETFD, FD_CLOEXEC);
+#endif
+	return ( s );
+}
+
+static int
+ldap_pvt_close_socket(LDAP *ld, int s)
+{
+	oslocal_debug(ld, "ldap_close_socket: %d\n",s,0,0);
+	return tcp_close(s);
+}
+
+#undef TRACE
+#define TRACE do { \
+	char ebuf[128]; \
+	oslocal_debug(ld, \
+		"ldap_is_socket_ready: error on socket %d: errno: %d (%s)\n", \
+		s, \
+		errno, \
+		AC_STRERROR_R(errno, ebuf, sizeof ebuf)); \
+} while( 0 )
+
+/*
+ * check the socket for errors after select returned.
+ */
+static int
+ldap_pvt_is_socket_ready(LDAP *ld, int s)
+{
+	oslocal_debug(ld, "ldap_is_sock_ready: %d\n",s,0,0);
+
+#if defined( notyet ) /* && defined( SO_ERROR ) */
+{
+	int so_errno;
+	ber_socklen_t dummy = sizeof(so_errno);
+	if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy )
+		== AC_SOCKET_ERROR )
+	{
+		return -1;
+	}
+	if ( so_errno ) {
+		ldap_pvt_set_errno(so_errno);
+		TRACE;
+		return -1;
+	}
+	return 0;
+}
+#else
+{
+	/* error slippery */
+	struct sockaddr_un sa;
+	char ch;
+	ber_socklen_t dummy = sizeof(sa);
+	if ( getpeername( s, (struct sockaddr *) &sa, &dummy )
+		== AC_SOCKET_ERROR )
+	{
+		/* XXX: needs to be replace with ber_stream_read() */
+		(void)read(s, &ch, 1);
+		TRACE;
+		return -1;
+	}
+	return 0;
+}
+#endif
+	return -1;
+}
+#undef TRACE
+
+#ifdef LDAP_PF_LOCAL_SENDMSG
+static const char abandonPDU[] = {LDAP_TAG_MESSAGE, 6,
+	LDAP_TAG_MSGID, 1, 0, LDAP_REQ_ABANDON, 1, 0};
+#endif
+
+static int
+ldap_pvt_connect(LDAP *ld, ber_socket_t s, struct sockaddr_un *sa, int async)
+{
+	int rc;
+	struct timeval	tv, *opt_tv = NULL;
+
+	if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
+		tv = ld->ld_options.ldo_tm_net;
+		opt_tv = &tv;
+	}
+
+	oslocal_debug(ld, "ldap_connect_timeout: fd: %d tm: %ld async: %d\n",
+		s, opt_tv ? tv.tv_sec : -1L, async);
+
+	if ( ldap_pvt_ndelay_on(ld, s) == -1 ) return -1;
+
+	if ( connect(s, (struct sockaddr *) sa, sizeof(struct sockaddr_un))
+		!= AC_SOCKET_ERROR )
+	{
+		if ( ldap_pvt_ndelay_off(ld, s) == -1 ) return -1;
+
+#ifdef LDAP_PF_LOCAL_SENDMSG
+	/* Send a dummy message with access rights. Remote side will
+	 * obtain our uid/gid by fstat'ing this descriptor. The
+	 * descriptor permissions must match exactly, and we also
+	 * send the socket name, which must also match.
+	 */
+sendcred:
+		{
+			int fds[2];
+			ber_socklen_t salen = sizeof(*sa);
+			if (pipe(fds) == 0) {
+				/* Abandon, noop, has no reply */
+				struct iovec iov;
+				struct msghdr msg = {0};
+# ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
+# ifndef CMSG_SPACE
+# define CMSG_SPACE(len)	(_CMSG_ALIGN( sizeof(struct cmsghdr)) + _CMSG_ALIGN(len) )
+# endif
+# ifndef CMSG_LEN
+# define CMSG_LEN(len)		(_CMSG_ALIGN( sizeof(struct cmsghdr)) + (len) )
+# endif
+				union {
+					struct cmsghdr cm;
+					unsigned char control[CMSG_SPACE(sizeof(int))];
+				} control_un;
+				struct cmsghdr *cmsg;
+# endif /* HAVE_STRUCT_MSGHDR_MSG_CONTROL */
+				msg.msg_name = NULL;
+				msg.msg_namelen = 0;
+				iov.iov_base = (char *) abandonPDU;
+				iov.iov_len = sizeof abandonPDU;
+				msg.msg_iov = &iov;
+				msg.msg_iovlen = 1;
+# ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
+				msg.msg_control = control_un.control;
+				msg.msg_controllen = sizeof( control_un.control );
+				msg.msg_flags = 0;
+
+				cmsg = CMSG_FIRSTHDR( &msg );
+				cmsg->cmsg_len = CMSG_LEN( sizeof(int) );
+				cmsg->cmsg_level = SOL_SOCKET;
+				cmsg->cmsg_type = SCM_RIGHTS;
+
+				*((int *)CMSG_DATA(cmsg)) = fds[0];
+# else
+				msg.msg_accrights = (char *)fds;
+				msg.msg_accrightslen = sizeof(int);
+# endif /* HAVE_STRUCT_MSGHDR_MSG_CONTROL */
+				getpeername( s, (struct sockaddr *) sa, &salen );
+				fchmod( fds[0], S_ISUID|S_IRWXU );
+				write( fds[1], sa, salen );
+				sendmsg( s, &msg, 0 );
+				close(fds[0]);
+				close(fds[1]);
+			}
+		}
+#endif
+		return 0;
+	}
+
+	if ( errno != EINPROGRESS && errno != EWOULDBLOCK ) return -1;
+	
+#ifdef notyet
+	if ( async ) return -2;
+#endif
+
+#ifdef HAVE_POLL
+	{
+		struct pollfd fd;
+		int timeout = INFTIM;
+
+		if( opt_tv != NULL ) timeout = TV2MILLISEC( &tv );
+
+		fd.fd = s;
+		fd.events = POLL_WRITE;
+
+		do {
+			fd.revents = 0;
+			rc = poll( &fd, 1, timeout );
+		} while( rc == AC_SOCKET_ERROR && errno == EINTR &&
+			LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART ));
+
+		if( rc == AC_SOCKET_ERROR ) return rc;
+
+		if( fd.revents & POLL_WRITE ) {
+			if ( ldap_pvt_is_socket_ready(ld, s) == -1 ) return -1;
+			if ( ldap_pvt_ndelay_off(ld, s) == -1 ) return -1;
+#ifdef LDAP_PF_LOCAL_SENDMSG
+			goto sendcred;
+#else
+			return ( 0 );
+#endif
+		}
+	}
+#else
+	{
+		fd_set wfds, *z=NULL;
+
+#ifdef FD_SETSIZE
+		if ( s >= FD_SETSIZE ) {
+			rc = AC_SOCKET_ERROR;
+			tcp_close( s );
+			ldap_pvt_set_errno( EMFILE );
+			return rc;
+		}
+#endif
+		do { 
+			FD_ZERO(&wfds);
+			FD_SET(s, &wfds );
+			rc = select( ldap_int_tblsize, z, &wfds, z, opt_tv ? &tv : NULL );
+		} while( rc == AC_SOCKET_ERROR && errno == EINTR &&
+			LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART ));
+
+		if( rc == AC_SOCKET_ERROR ) return rc;
+
+		if ( FD_ISSET(s, &wfds) ) {
+			if ( ldap_pvt_is_socket_ready(ld, s) == -1 ) return -1;
+			if ( ldap_pvt_ndelay_off(ld, s) == -1 ) return -1;
+#ifdef LDAP_PF_LOCAL_SENDMSG
+			goto sendcred;
+#else
+			return ( 0 );
+#endif
+		}
+	}
+#endif
+
+	oslocal_debug(ld, "ldap_connect_timeout: timed out\n",0,0,0);
+	ldap_pvt_set_errno( ETIMEDOUT );
+	return ( -1 );
+}
+
+int
+ldap_connect_to_path(LDAP *ld, Sockbuf *sb, LDAPURLDesc *srv, int async)
+{
+	struct sockaddr_un	server;
+	ber_socket_t		s;
+	int			rc;
+	const char *path = srv->lud_host;
+
+	oslocal_debug(ld, "ldap_connect_to_path\n",0,0,0);
+
+	if ( path == NULL || path[0] == '\0' ) {
+		path = LDAPI_SOCK;
+	} else {
+		if ( strlen(path) > (sizeof( server.sun_path ) - 1) ) {
+			ldap_pvt_set_errno( ENAMETOOLONG );
+			return -1;
+		}
+	}
+
+	s = ldap_pvt_socket( ld );
+	if ( s == AC_SOCKET_INVALID ) {
+		return -1;
+	}
+
+	oslocal_debug(ld, "ldap_connect_to_path: Trying %s\n", path, 0, 0);
+
+	memset( &server, '\0', sizeof(server) );
+	server.sun_family = AF_LOCAL;
+	strcpy( server.sun_path, path );
+
+	rc = ldap_pvt_connect(ld, s, &server, async);
+
+	if (rc == 0) {
+		rc = ldap_int_connect_cbs( ld, sb, &s, srv, (struct sockaddr *)&server );
+	}
+	if ( rc ) {
+		ldap_pvt_close_socket(ld, s);
+	}
+	return rc;
+}
+#else
+static int dummy; /* generate also a warning: 'dummy' defined but not used (at least here) */
+#endif /* LDAP_PF_LOCAL */