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/* $OpenBSD: activate.c,v 1.7 2008/03/13 01:49:52 deraadt Exp $ */
/* $NetBSD: activate.c,v 1.5 1995/04/23 10:33:18 cgd Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* from: Id: activate.c,v 1.2 1992/05/27 07:09:27 jsp Exp
* @(#)activate.c 8.3 (Berkeley) 4/28/95
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/syslog.h>
#include <sys/uio.h>
#include "portald.h"
/*
* Scan the providers list and call the
* appropriate function.
*/
static int
activate_argv(struct portal_cred *pcr, char *key, char **v, int so, int *fdp)
{
provider *pr;
for (pr = providers; pr->pr_match; pr++)
if (strcmp(v[0], pr->pr_match) == 0)
return ((*pr->pr_func)(pcr, key, v, so, fdp));
return (ENOENT);
}
static int
get_request(int so, struct portal_cred *pcr, char *key, int klen)
{
struct iovec iov[2];
struct msghdr msg;
int n;
iov[0].iov_base = (caddr_t)pcr;
iov[0].iov_len = sizeof(*pcr);
iov[1].iov_base = key;
iov[1].iov_len = klen;
(void)memset(&msg, 0, sizeof(msg));
msg.msg_iov = iov;
msg.msg_iovlen = 2;
n = recvmsg(so, &msg, 0);
if (n < 0)
return (errno);
if (n <= sizeof(*pcr))
return (EINVAL);
n -= sizeof(*pcr);
key[n] = '\0';
return (0);
}
static void
send_reply(int so, int fd, int error)
{
int n;
struct iovec iov;
struct msghdr msg;
struct cmsghdr *cmsg;
struct {
struct cmsghdr cmsg;
u_char buf[CMSG_SPACE(sizeof(int))];
} cmsgbuf;
/*
* Line up error code. Don't worry about byte ordering
* because we must be sending to the local machine.
*/
iov.iov_base = (caddr_t)&error;
iov.iov_len = sizeof(error);
/*
* Build a msghdr
*/
(void)memset(&msg, 0, sizeof(msg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
/*
* If there is a file descriptor to send then
* construct a suitable rights control message.
*/
if (fd >= 0) {
msg.msg_control = (caddr_t)&cmsgbuf.buf;
msg.msg_controllen = sizeof(cmsgbuf.buf);
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) = fd;
}
/*
* Send to kernel...
*/
if ((n = sendmsg(so, &msg, 0)) < 0)
syslog(LOG_ERR, "send: %m");
#ifdef DEBUG
(void)fprintf(stderr, "sent %d bytes\n", n);
#endif
sleep(1); /* XXX */
#ifdef notdef
if (shutdown(so, 2) < 0)
syslog(LOG_ERR, "shutdown: %m");
#endif
/*
* Throw away the open file descriptor
*/
(void)close(fd);
}
void
activate(qelem *q, int so)
{
struct portal_cred pcred;
char key[MAXPATHLEN+1];
int error;
char **v;
int fd = -1;
/*
* Read the key from the socket
*/
error = get_request(so, &pcred, key, sizeof(key));
if (error) {
syslog(LOG_ERR, "activate: recvmsg: %m");
goto drop;
}
#ifdef DEBUG
(void)fprintf(stderr, "lookup key %s\n", key);
#endif
/*
* Find a match in the configuration file
*/
v = conf_match(q, key);
/*
* If a match existed, then find an appropriate portal
* otherwise simply return ENOENT.
*/
if (v) {
error = activate_argv(&pcred, key, v, so, &fd);
if (error)
fd = -1;
else if (fd < 0)
error = -1;
} else {
error = ENOENT;
}
if (error >= 0)
send_reply(so, fd, error);
drop:;
close(so);
}
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