aed378729e
- Fix an abnormal termination caused by twice of "rtadvctl disable". (r224303) - Use poll() to wait for the control message socket instead of a spin loop. (r224304) - s/cmsg_/cm_/ to avoid conflict with CMSG_* symbols for struct cmsghdr. (r224619) - Ignore an interface that never sent RAs for graceful shut-down. (r224620) - Refine log messages. (r225148) - Fix SIGSEGV when receiving RAs that contain RDNSS and/or DNSSL options. (r225149) Approved by: re (kib)
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*-
|
|
* Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.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. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
#include <sys/queue.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/un.h>
|
|
#include <sys/uio.h>
|
|
#include <net/if.h>
|
|
#include <net/if_dl.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/icmp6.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <syslog.h>
|
|
|
|
#include "pathnames.h"
|
|
#include "rtadvd.h"
|
|
#include "if.h"
|
|
#include "control.h"
|
|
#include "control_client.h"
|
|
|
|
int
|
|
cm_handler_client(int fd, int state, char *buf_orig)
|
|
{
|
|
char buf[CM_MSG_MAXLEN];
|
|
struct ctrl_msg_hdr *cm;
|
|
struct ctrl_msg_hdr *cm_orig;
|
|
int error;
|
|
char *msg;
|
|
char *msg_orig;
|
|
|
|
syslog(LOG_DEBUG, "<%s> enter", __func__);
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
cm = (struct ctrl_msg_hdr *)buf;
|
|
cm_orig = (struct ctrl_msg_hdr *)buf_orig;
|
|
msg = (char *)buf + sizeof(*cm);
|
|
msg_orig = (char *)buf_orig + sizeof(*cm_orig);
|
|
|
|
if (cm_orig->cm_len > CM_MSG_MAXLEN) {
|
|
syslog(LOG_DEBUG, "<%s> msg too long", __func__);
|
|
close(fd);
|
|
return (-1);
|
|
}
|
|
cm->cm_type = cm_orig->cm_type;
|
|
if (cm_orig->cm_len > sizeof(*cm_orig)) {
|
|
memcpy(msg, msg_orig, cm_orig->cm_len - sizeof(*cm));
|
|
cm->cm_len = cm_orig->cm_len;
|
|
}
|
|
while (state != CM_STATE_EOM) {
|
|
syslog(LOG_DEBUG, "<%s> state = %d", __func__, state);
|
|
|
|
switch (state) {
|
|
case CM_STATE_INIT:
|
|
state = CM_STATE_EOM;
|
|
break;
|
|
case CM_STATE_MSG_DISPATCH:
|
|
cm->cm_version = CM_VERSION;
|
|
error = cm_send(fd, buf);
|
|
if (error)
|
|
syslog(LOG_WARNING,
|
|
"<%s> cm_send()", __func__);
|
|
state = CM_STATE_ACK_WAIT;
|
|
break;
|
|
case CM_STATE_ACK_WAIT:
|
|
error = cm_recv(fd, buf);
|
|
if (error) {
|
|
syslog(LOG_ERR,
|
|
"<%s> cm_recv()", __func__);
|
|
close(fd);
|
|
return (-1);
|
|
}
|
|
switch (cm->cm_type) {
|
|
case CM_TYPE_ACK:
|
|
syslog(LOG_DEBUG,
|
|
"<%s> CM_TYPE_ACK", __func__);
|
|
break;
|
|
case CM_TYPE_ERR:
|
|
syslog(LOG_DEBUG,
|
|
"<%s> CM_TYPE_ERR", __func__);
|
|
close(fd);
|
|
return (-1);
|
|
default:
|
|
syslog(LOG_DEBUG,
|
|
"<%s> unknown status", __func__);
|
|
close(fd);
|
|
return (-1);
|
|
}
|
|
memcpy(buf_orig, buf, cm->cm_len);
|
|
state = CM_STATE_EOM;
|
|
break;
|
|
}
|
|
}
|
|
close(fd);
|
|
return (0);
|
|
}
|