wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,613 @@
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/*
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Unix SMB/CIFS implementation.
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winbind client common code
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Copyright (C) Tim Potter 2000
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Copyright (C) Andrew Tridgell 2000
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Copyright (C) Andrew Bartlett 2002
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include "includes.h"
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#include "nsswitch/winbind_client.h"
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/* Global variables. These are effectively the client state information */
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int winbindd_fd = -1; /* fd for winbindd socket */
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/* Free a response structure */
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void free_response(struct winbindd_response *response)
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{
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/* Free any allocated extra_data */
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if (response)
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SAFE_FREE(response->extra_data);
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}
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/* Initialise a request structure */
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void init_request(struct winbindd_request *request, int request_type)
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{
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request->length = sizeof(struct winbindd_request);
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request->cmd = (enum winbindd_cmd)request_type;
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request->pid = getpid();
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}
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/* Initialise a response structure */
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void init_response(struct winbindd_response *response)
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{
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/* Initialise return value */
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response->result = WINBINDD_ERROR;
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}
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/* Close established socket */
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void close_sock(void)
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{
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if (winbindd_fd != -1) {
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close(winbindd_fd);
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winbindd_fd = -1;
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}
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}
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#define CONNECT_TIMEOUT 30
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#if 0 /* unused */
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#define WRITE_TIMEOUT CONNECT_TIMEOUT
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#define READ_TIMEOUT CONNECT_TIMEOUT
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#endif
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/* Make sure socket handle isn't stdin, stdout or stderr */
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#define RECURSION_LIMIT 3
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static int make_nonstd_fd_internals(int fd, int limit /* Recursion limiter */)
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{
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int new_fd;
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if (fd >= 0 && fd <= 2) {
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#ifdef F_DUPFD
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if ((new_fd = fcntl(fd, F_DUPFD, 3)) == -1) {
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return -1;
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}
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/* Paranoia */
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if (new_fd < 3) {
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close(new_fd);
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return -1;
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}
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close(fd);
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return new_fd;
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#else
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if (limit <= 0)
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return -1;
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new_fd = dup(fd);
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if (new_fd == -1)
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return -1;
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/* use the program stack to hold our list of FDs to close */
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new_fd = make_nonstd_fd_internals(new_fd, limit - 1);
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close(fd);
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return new_fd;
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#endif
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}
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return fd;
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}
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/****************************************************************************
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Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
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else
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if SYSV use O_NDELAY
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if BSD use FNDELAY
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Set close on exec also.
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****************************************************************************/
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static int make_safe_fd(int fd)
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{
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int result, flags;
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int new_fd = make_nonstd_fd_internals(fd, RECURSION_LIMIT);
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if (new_fd == -1) {
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close(fd);
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return -1;
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}
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/* Socket should be nonblocking. */
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#ifdef O_NONBLOCK
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#define FLAG_TO_SET O_NONBLOCK
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#else
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#ifdef SYSV
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#define FLAG_TO_SET O_NDELAY
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#else /* BSD */
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#define FLAG_TO_SET FNDELAY
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#endif
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#endif
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if ((flags = fcntl(new_fd, F_GETFL)) == -1) {
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close(new_fd);
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return -1;
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}
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flags |= FLAG_TO_SET;
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if (fcntl(new_fd, F_SETFL, flags) == -1) {
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close(new_fd);
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return -1;
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}
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#undef FLAG_TO_SET
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/* Socket should be closed on exec() */
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#ifdef FD_CLOEXEC
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result = flags = fcntl(new_fd, F_GETFD, 0);
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if (flags >= 0) {
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flags |= FD_CLOEXEC;
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result = fcntl( new_fd, F_SETFD, flags );
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}
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if (result < 0) {
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close(new_fd);
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return -1;
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}
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#endif
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return new_fd;
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}
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/* Connect to winbindd socket */
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static int winbind_named_pipe_sock(const char *dir)
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{
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struct sockaddr_un sunaddr;
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struct stat st;
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char *path;
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int fd;
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int wait_time;
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int slept;
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/* Check permissions on unix socket directory */
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if (lstat(dir, &st) == -1) {
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return -1;
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}
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if (!S_ISDIR(st.st_mode) ||
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(st.st_uid != 0 && st.st_uid != geteuid())) {
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return -1;
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}
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/* Connect to socket */
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asprintf(&path, "%s%s", dir, "/" WINBINDD_SOCKET_NAME);
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ZERO_STRUCT(sunaddr);
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sunaddr.sun_family = AF_UNIX;
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strncpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path) - 1);
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/* If socket file doesn't exist, don't bother trying to connect
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with retry. This is an attempt to make the system usable when
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the winbindd daemon is not running. */
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if (lstat(path, &st) == -1) {
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SAFE_FREE(path);
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return -1;
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}
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SAFE_FREE(path);
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/* Check permissions on unix socket file */
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if (!S_ISSOCK(st.st_mode) ||
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(st.st_uid != 0 && st.st_uid != geteuid())) {
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return -1;
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}
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/* Connect to socket */
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if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
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return -1;
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}
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/* Set socket non-blocking and close on exec. */
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if ((fd = make_safe_fd( fd)) == -1) {
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return fd;
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}
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for (wait_time = 0; connect(fd, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1;
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wait_time += slept) {
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struct timeval tv;
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fd_set w_fds;
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int ret;
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int connect_errno = 0;
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socklen_t errnosize;
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if (wait_time >= CONNECT_TIMEOUT)
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goto error_out;
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switch (errno) {
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case EINPROGRESS:
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FD_ZERO(&w_fds);
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FD_SET(fd, &w_fds);
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tv.tv_sec = CONNECT_TIMEOUT - wait_time;
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tv.tv_usec = 0;
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ret = select(fd + 1, NULL, &w_fds, NULL, &tv);
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if (ret > 0) {
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errnosize = sizeof(connect_errno);
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ret = getsockopt(fd, SOL_SOCKET,
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SO_ERROR, &connect_errno, &errnosize);
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if (ret >= 0 && connect_errno == 0) {
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/* Connect succeed */
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goto out;
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}
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}
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slept = CONNECT_TIMEOUT;
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break;
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case EAGAIN:
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slept = rand() % 3 + 1;
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sleep(slept);
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break;
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default:
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goto error_out;
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}
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}
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out:
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return fd;
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error_out:
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close(fd);
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return -1;
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if (connect(fd, (struct sockaddr *)&sunaddr,
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sizeof(sunaddr)) == -1) {
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close(fd);
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return -1;
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}
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return fd;
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}
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/* Connect to winbindd socket */
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int winbind_open_pipe_sock(void)
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{
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#ifdef HAVE_UNIXSOCKET
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static pid_t our_pid;
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struct winbindd_request request;
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struct winbindd_response response;
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ZERO_STRUCT(request);
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ZERO_STRUCT(response);
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if (our_pid != getpid()) {
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close_sock();
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our_pid = getpid();
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}
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if (winbindd_fd != -1) {
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return winbindd_fd;
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}
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if ((winbindd_fd = winbind_named_pipe_sock(WINBINDD_SOCKET_DIR)) == -1) {
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return -1;
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}
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/* version-check the socket */
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if ((winbindd_request(WINBINDD_INTERFACE_VERSION, &request, &response) != NSS_STATUS_SUCCESS) || (response.data.interface_version != WINBIND_INTERFACE_VERSION)) {
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close_sock();
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return -1;
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}
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/* try and get priv pipe */
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if (winbindd_request(WINBINDD_PRIV_PIPE_DIR, &request, &response) == NSS_STATUS_SUCCESS) {
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int fd;
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if ((fd = winbind_named_pipe_sock(response.extra_data)) != -1) {
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close(winbindd_fd);
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winbindd_fd = fd;
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}
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}
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SAFE_FREE(response.extra_data);
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return winbindd_fd;
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#else
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return -1;
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#endif /* HAVE_UNIXSOCKET */
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}
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/* Write data to winbindd socket */
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int write_sock(void *buffer, int count)
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{
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int result, nwritten;
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/* Open connection to winbind daemon */
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restart:
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if (winbind_open_pipe_sock() == -1) {
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return -1;
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||||
}
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/* Write data to socket */
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nwritten = 0;
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|
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while(nwritten < count) {
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struct timeval tv;
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fd_set r_fds;
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||||
|
||||
/* Catch pipe close on other end by checking if a read()
|
||||
call would not block by calling select(). */
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||||
FD_ZERO(&r_fds);
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FD_SET(winbindd_fd, &r_fds);
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ZERO_STRUCT(tv);
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|
||||
if (select(winbindd_fd + 1, &r_fds, NULL, NULL, &tv) == -1) {
|
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close_sock();
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||||
return -1; /* Select error */
|
||||
}
|
||||
|
||||
/* Write should be OK if fd not available for reading */
|
||||
|
||||
if (!FD_ISSET(winbindd_fd, &r_fds)) {
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||||
|
||||
/* Do the write */
|
||||
|
||||
result = write(winbindd_fd,
|
||||
(char *)buffer + nwritten,
|
||||
count - nwritten);
|
||||
|
||||
if ((result == -1) || (result == 0)) {
|
||||
|
||||
/* Write failed */
|
||||
|
||||
close_sock();
|
||||
return -1;
|
||||
}
|
||||
|
||||
nwritten += result;
|
||||
|
||||
} else {
|
||||
|
||||
/* Pipe has closed on remote end */
|
||||
|
||||
close_sock();
|
||||
goto restart;
|
||||
}
|
||||
}
|
||||
|
||||
return nwritten;
|
||||
}
|
||||
|
||||
/* Read data from winbindd socket */
|
||||
|
||||
static int read_sock(void *buffer, int count)
|
||||
{
|
||||
int result = 0, nread = 0;
|
||||
int total_time = 0, selret;
|
||||
|
||||
/* Read data from socket */
|
||||
while(nread < count) {
|
||||
struct timeval tv;
|
||||
fd_set r_fds;
|
||||
|
||||
/* Catch pipe close on other end by checking if a read()
|
||||
call would not block by calling select(). */
|
||||
|
||||
FD_ZERO(&r_fds);
|
||||
FD_SET(winbindd_fd, &r_fds);
|
||||
ZERO_STRUCT(tv);
|
||||
/* Wait for 5 seconds for a reply. May need to parameterise this... */
|
||||
tv.tv_sec = 5;
|
||||
|
||||
if ((selret = select(winbindd_fd + 1, &r_fds, NULL, NULL, &tv)) == -1) {
|
||||
close_sock();
|
||||
return -1; /* Select error */
|
||||
}
|
||||
|
||||
if (selret == 0) {
|
||||
/* Not ready for read yet... */
|
||||
if (total_time >= 30) {
|
||||
/* Timeout */
|
||||
close_sock();
|
||||
return -1;
|
||||
}
|
||||
total_time += 5;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (FD_ISSET(winbindd_fd, &r_fds)) {
|
||||
|
||||
/* Do the Read */
|
||||
|
||||
result = read(winbindd_fd, (char *)buffer + nread,
|
||||
count - nread);
|
||||
|
||||
if ((result == -1) || (result == 0)) {
|
||||
|
||||
/* Read failed. I think the only useful thing we
|
||||
can do here is just return -1 and fail since the
|
||||
transaction has failed half way through. */
|
||||
|
||||
close_sock();
|
||||
return -1;
|
||||
}
|
||||
|
||||
nread += result;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/* Read reply */
|
||||
|
||||
int read_reply(struct winbindd_response *response)
|
||||
{
|
||||
int result1, result2 = 0;
|
||||
|
||||
if (!response) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Read fixed length response */
|
||||
|
||||
if ((result1 = read_sock(response, sizeof(struct winbindd_response)))
|
||||
== -1) {
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* We actually send the pointer value of the extra_data field from
|
||||
the server. This has no meaning in the client's address space
|
||||
so we clear it out. */
|
||||
|
||||
response->extra_data = NULL;
|
||||
|
||||
/* Read variable length response */
|
||||
|
||||
if (response->length > sizeof(struct winbindd_response)) {
|
||||
int extra_data_len = response->length -
|
||||
sizeof(struct winbindd_response);
|
||||
|
||||
/* Mallocate memory for extra data */
|
||||
|
||||
if (!(response->extra_data = malloc(extra_data_len))) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
if ((result2 = read_sock(response->extra_data, extra_data_len))
|
||||
== -1) {
|
||||
free_response(response);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Return total amount of data read */
|
||||
|
||||
return result1 + result2;
|
||||
}
|
||||
|
||||
/*
|
||||
* send simple types of requests
|
||||
*/
|
||||
|
||||
NSS_STATUS winbindd_send_request(int req_type, struct winbindd_request *request)
|
||||
{
|
||||
struct winbindd_request lrequest;
|
||||
char *env;
|
||||
int value;
|
||||
|
||||
/* Check for our tricky environment variable */
|
||||
|
||||
if ( (env = getenv(WINBINDD_DONT_ENV)) != NULL ) {
|
||||
value = atoi(env);
|
||||
if ( value == 1 )
|
||||
return NSS_STATUS_NOTFOUND;
|
||||
}
|
||||
|
||||
if (!request) {
|
||||
ZERO_STRUCT(lrequest);
|
||||
request = &lrequest;
|
||||
}
|
||||
|
||||
/* Fill in request and send down pipe */
|
||||
|
||||
init_request(request, req_type);
|
||||
|
||||
if (write_sock(request, sizeof(*request)) == -1) {
|
||||
return NSS_STATUS_UNAVAIL;
|
||||
}
|
||||
|
||||
return NSS_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
/*
|
||||
* Get results from winbindd request
|
||||
*/
|
||||
|
||||
NSS_STATUS winbindd_get_response(struct winbindd_response *response)
|
||||
{
|
||||
struct winbindd_response lresponse;
|
||||
|
||||
if (!response) {
|
||||
ZERO_STRUCT(lresponse);
|
||||
response = &lresponse;
|
||||
}
|
||||
|
||||
init_response(response);
|
||||
|
||||
/* Wait for reply */
|
||||
if (read_reply(response) == -1) {
|
||||
return NSS_STATUS_UNAVAIL;
|
||||
}
|
||||
|
||||
/* Throw away extra data if client didn't request it */
|
||||
if (response == &lresponse) {
|
||||
free_response(response);
|
||||
}
|
||||
|
||||
/* Copy reply data from socket */
|
||||
if (response->result != WINBINDD_OK) {
|
||||
return NSS_STATUS_NOTFOUND;
|
||||
}
|
||||
|
||||
return NSS_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
/* Handle simple types of requests */
|
||||
|
||||
NSS_STATUS winbindd_request(int req_type,
|
||||
struct winbindd_request *request,
|
||||
struct winbindd_response *response)
|
||||
{
|
||||
NSS_STATUS status;
|
||||
|
||||
status = winbindd_send_request(req_type, request);
|
||||
if (status != NSS_STATUS_SUCCESS)
|
||||
return(status);
|
||||
return winbindd_get_response(response);
|
||||
}
|
||||
|
||||
/*************************************************************************
|
||||
A couple of simple functions to disable winbindd lookups and re-
|
||||
enable them
|
||||
************************************************************************/
|
||||
|
||||
BOOL winbind_off( void )
|
||||
{
|
||||
setenv(WINBINDD_DONT_ENV, "1", 1);
|
||||
return True;
|
||||
}
|
||||
|
||||
BOOL winbind_on( void )
|
||||
{
|
||||
setenv(WINBINDD_DONT_ENV, "0", 1);
|
||||
return True;
|
||||
}
|
||||
Reference in New Issue
Block a user