1/*-
2 * Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
21 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 *
28 */
29
30#include <sys/queue.h>
31#include <sys/types.h>
32#include <sys/socket.h>
33#include <sys/stat.h>
34#include <sys/un.h>
35#include <sys/uio.h>
36#include <net/if.h>
37#include <net/if_dl.h>
38#include <netinet/in.h>
39#include <netinet/icmp6.h>
40#include <fcntl.h>
41#include <errno.h>
42#include <netdb.h>
43#include <unistd.h>
44#include <signal.h>
45#include <string.h>
46#include <stdarg.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <syslog.h>
50
51#include "pathnames.h"
52#include "rtadvd.h"
53#include "if.h"
54#include "control.h"
55#include "control_client.h"
56
57int
58cm_handler_client(int fd, int state, char *buf_orig)
59{
60	char buf[CM_MSG_MAXLEN];
61	struct ctrl_msg_hdr *cm;
62	struct ctrl_msg_hdr *cm_orig;
63	int error;
64	char *msg;
65	char *msg_orig;
66
67	syslog(LOG_DEBUG, "<%s> enter", __func__);
68
69	memset(buf, 0, sizeof(buf));
70	cm = (struct ctrl_msg_hdr *)buf;
71	cm_orig = (struct ctrl_msg_hdr *)buf_orig;
72	msg = (char *)buf + sizeof(*cm);
73	msg_orig = (char *)buf_orig + sizeof(*cm_orig);
74
75	if (cm_orig->cm_len > CM_MSG_MAXLEN) {
76		syslog(LOG_DEBUG, "<%s> msg too long", __func__);
77		close(fd);
78		return (-1);
79	}
80	cm->cm_type = cm_orig->cm_type;
81	if (cm_orig->cm_len > sizeof(*cm_orig)) {
82		memcpy(msg, msg_orig, cm_orig->cm_len - sizeof(*cm));
83		cm->cm_len = cm_orig->cm_len;
84	}
85	while (state != CM_STATE_EOM) {
86		syslog(LOG_DEBUG, "<%s> state = %d", __func__, state);
87
88		switch (state) {
89		case CM_STATE_INIT:
90			state = CM_STATE_EOM;
91			break;
92		case CM_STATE_MSG_DISPATCH:
93			cm->cm_version = CM_VERSION;
94			error = cm_send(fd, buf);
95			if (error)
96				syslog(LOG_WARNING,
97				    "<%s> cm_send()", __func__);
98			state = CM_STATE_ACK_WAIT;
99			break;
100		case CM_STATE_ACK_WAIT:
101			error = cm_recv(fd, buf);
102			if (error) {
103				syslog(LOG_ERR,
104				    "<%s> cm_recv()", __func__);
105				close(fd);
106				return (-1);
107			}
108			switch (cm->cm_type) {
109			case CM_TYPE_ACK:
110				syslog(LOG_DEBUG,
111				    "<%s> CM_TYPE_ACK", __func__);
112				break;
113			case CM_TYPE_ERR:
114				syslog(LOG_DEBUG,
115				    "<%s> CM_TYPE_ERR", __func__);
116				close(fd);
117				return (-1);
118			default:
119				syslog(LOG_DEBUG,
120				    "<%s> unknown status", __func__);
121				close(fd);
122				return (-1);
123			}
124			memcpy(buf_orig, buf, cm->cm_len);
125			state = CM_STATE_EOM;
126			break;
127		}
128	}
129	close(fd);
130	return (0);
131}
132