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/* $OpenBSD: sock.c,v 1.8 2004/12/07 17:10:56 tedu Exp $ */
/*
* Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <poll.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "log.h"
#include "sock.h"
#include "cvsd.h"
#include "event.h"
volatile sig_atomic_t cvs_sock_doloop;
char *cvsd_sock_path = CVSD_SOCK_PATH;
/* daemon API */
#ifdef CVSD
int cvsd_sock = -1;
static struct sockaddr_un cvsd_sun;
#endif
/* for client API */
#ifdef CVS
static int cvs_sock = -1;
static struct sockaddr_un cvs_sun;
#endif
#ifdef CVSD
/*
* cvsd_sock_open()
*
* Open the daemon's local socket. If the server socket is already opened,
* we close it before reopening it.
* Returns 0 on success, -1 on failure.
*/
int
cvsd_sock_open(void)
{
if (cvsd_sock >= 0)
cvsd_sock_close();
cvsd_sun.sun_family = AF_LOCAL;
strlcpy(cvsd_sun.sun_path, cvsd_sock_path, sizeof(cvsd_sun.sun_path));
cvsd_sock = socket(AF_LOCAL, SOCK_STREAM, 0);
if (cvsd_sock == -1) {
cvs_log(LP_ERRNO, "failed to open socket");
return (-1);
}
if (bind(cvsd_sock, (struct sockaddr *)&cvsd_sun,
SUN_LEN(&cvsd_sun)) == -1) {
cvs_log(LP_ERRNO, "failed to bind local socket to `%s'",
cvsd_sock_path);
(void)close(cvsd_sock);
return (-1);
}
(void)listen(cvsd_sock, 10);
if (chown(cvsd_sock_path, getuid(), cvsd_gid) == -1) {
cvs_log(LP_ERRNO, "failed to change owner of `%s'",
cvsd_sock_path);
(void)close(cvsd_sock);
(void)unlink(cvsd_sock_path);
return (-1);
}
if (chmod(cvsd_sock_path, CVSD_SOCK_PERMS) == -1) {
cvs_log(LP_ERRNO, "failed to change mode of `%s'",
cvsd_sock_path);
(void)close(cvsd_sock);
(void)unlink(cvsd_sock_path);
return (-1);
}
cvs_log(LP_DEBUG, "opened local socket `%s'", cvsd_sock_path);
return (0);
}
/*
* cvsd_sock_close()
*
* Close the local socket.
*/
void
cvsd_sock_close(void)
{
cvs_log(LP_DEBUG, "closing local socket `%s'", CVSD_SOCK_PATH);
if (close(cvsd_sock) == -1) {
cvs_log(LP_ERRNO, "failed to close local socket");
}
if (seteuid(0) == -1)
cvs_log(LP_ERRNO, "failed to regain privileges");
else if (unlink(cvsd_sock_path) == -1)
cvs_log(LP_ERRNO, "failed to unlink local socket `%s'",
cvsd_sock_path);
}
/*
* cvsd_sock_accept()
*
* Handler for connections made on the server's local domain socket.
* It accepts connections and looks for a child process that is currently
* idle to which it can dispatch the connection's descriptor. If there are
* no available child processes, a new one will be created unless the number
* of children has attained the maximum.
*/
int
cvsd_sock_accept(int fd)
{
int cfd;
socklen_t slen;
struct sockaddr_un sun;
slen = sizeof(sun);
cfd = accept(fd, (struct sockaddr *)&sun, &slen);
if (cfd == -1) {
cvs_log(LP_ERRNO, "failed to accept client connection");
return (-1);
}
return (cfd);
}
#endif
#ifdef CVS
/*
* cvs_sock_connect()
*
* Open a connection to the CVS server's local socket.
*/
int
cvs_sock_connect(const char *path)
{
cvs_sun.sun_family = AF_LOCAL;
strlcpy(cvs_sun.sun_path, path, sizeof(cvs_sun.sun_path));
cvs_log(LP_INFO, "connecting to CVS server socket `%s'",
cvs_sun.sun_path);
cvs_sock = socket(AF_LOCAL, SOCK_STREAM, 0);
if (cvs_sock == -1) {
cvs_log(LP_ERRNO, "failed to open local socket");
return (-1);
}
if (connect(cvs_sock, (struct sockaddr *)&cvs_sun,
SUN_LEN(&cvs_sun)) == -1) {
cvs_log(LP_ERRNO, "failed to connect to server socket `%s'",
cvs_sun.sun_path);
(void)close(cvs_sock);
return (-1);
}
return (0);
}
/*
* cvs_sock_disconnect()
*
* Disconnect from the open socket to the CVS server.
*/
void
cvs_sock_disconnect(void)
{
if (close(cvs_sock) == -1)
cvs_log(LP_ERRNO, "failed to close local socket");
}
#endif
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