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-rw-r--r--libraries/libldap/os-local.c363
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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 08:56:12 +0000