a09a9cbb40
cm_send() closes 'fd' on error. In that case, bail out early without trying to recv from or close 'fd' again. Reported by: Coverity CID: 1006078 Sponsored by: EMC / Isilon Storage Division
134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
/*-
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* Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/un.h>
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#include <sys/uio.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <netinet/in.h>
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#include <netinet/icmp6.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <signal.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include "pathnames.h"
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#include "rtadvd.h"
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#include "if.h"
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#include "control.h"
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#include "control_client.h"
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int
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cm_handler_client(int fd, int state, char *buf_orig)
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{
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char buf[CM_MSG_MAXLEN];
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struct ctrl_msg_hdr *cm;
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struct ctrl_msg_hdr *cm_orig;
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int error;
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char *msg;
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char *msg_orig;
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syslog(LOG_DEBUG, "<%s> enter", __func__);
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memset(buf, 0, sizeof(buf));
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cm = (struct ctrl_msg_hdr *)buf;
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cm_orig = (struct ctrl_msg_hdr *)buf_orig;
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msg = (char *)buf + sizeof(*cm);
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msg_orig = (char *)buf_orig + sizeof(*cm_orig);
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if (cm_orig->cm_len > CM_MSG_MAXLEN) {
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syslog(LOG_DEBUG, "<%s> msg too long", __func__);
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close(fd);
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return (-1);
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}
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cm->cm_type = cm_orig->cm_type;
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if (cm_orig->cm_len > sizeof(*cm_orig)) {
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memcpy(msg, msg_orig, cm_orig->cm_len - sizeof(*cm));
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cm->cm_len = cm_orig->cm_len;
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}
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while (state != CM_STATE_EOM) {
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syslog(LOG_DEBUG, "<%s> state = %d", __func__, state);
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switch (state) {
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case CM_STATE_INIT:
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state = CM_STATE_EOM;
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break;
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case CM_STATE_MSG_DISPATCH:
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cm->cm_version = CM_VERSION;
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error = cm_send(fd, buf);
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if (error) {
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syslog(LOG_WARNING,
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"<%s> cm_send()", __func__);
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return (-1);
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}
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state = CM_STATE_ACK_WAIT;
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break;
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case CM_STATE_ACK_WAIT:
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error = cm_recv(fd, buf);
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if (error) {
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syslog(LOG_ERR,
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"<%s> cm_recv()", __func__);
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close(fd);
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return (-1);
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}
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switch (cm->cm_type) {
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case CM_TYPE_ACK:
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syslog(LOG_DEBUG,
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"<%s> CM_TYPE_ACK", __func__);
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break;
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case CM_TYPE_ERR:
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syslog(LOG_DEBUG,
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"<%s> CM_TYPE_ERR", __func__);
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close(fd);
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return (-1);
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default:
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syslog(LOG_DEBUG,
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"<%s> unknown status", __func__);
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close(fd);
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return (-1);
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}
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memcpy(buf_orig, buf, cm->cm_len);
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state = CM_STATE_EOM;
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break;
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}
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}
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close(fd);
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return (0);
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}
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