/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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.
 *
 */

#include <sys/param.h>
#include <sys/queue.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 "config.h"
#include "control.h"
#include "control_server.h"
#include "timer.h"

static char *do_reload_ifname;
static int do_reload;
static int do_shutdown;

void set_do_reload(int sig __unused)    { do_reload = 1; }
void set_do_reload_ifname(char *ifname){ do_reload_ifname = ifname; }
void set_do_shutdown(int sig __unused)  { do_shutdown = 1; }
void reset_do_reload(void)      { do_reload = 0; do_reload_ifname = NULL; }
void reset_do_shutdown(void)    { do_shutdown = 0; }
int is_do_reload(void)          { return (do_reload); }
int is_do_shutdown(void)        { return (do_shutdown); }
char *reload_ifname(void)       { return (do_reload_ifname); }

#define DEF_PL_HANDLER(key)     { #key, cm_getprop_##key }

static int cm_getprop_echo(struct ctrl_msg_pl *);
static int cm_getprop_version(struct ctrl_msg_pl *);
static int cm_getprop_ifilist(struct ctrl_msg_pl *);
static int cm_getprop_ifi(struct ctrl_msg_pl *);
static int cm_getprop_ifi_ra_timer(struct ctrl_msg_pl *);
static int cm_getprop_rai(struct ctrl_msg_pl *);
static int cm_getprop_pfx(struct ctrl_msg_pl *);
static int cm_getprop_rdnss(struct ctrl_msg_pl *);
static int cm_getprop_dnssl(struct ctrl_msg_pl *);
static int cm_getprop_pref64(struct ctrl_msg_pl *);
static int cm_getprop_rti(struct ctrl_msg_pl *);

static int cm_setprop_reload(struct ctrl_msg_pl *);
static int cm_setprop_enable(struct ctrl_msg_pl *);
static int cm_setprop_disable(struct ctrl_msg_pl *);

static struct dispatch_table {
        const char      *dt_comm;
        int             (*dt_act)(struct ctrl_msg_pl *cp);
} getprop_dtable[] = {
        { "",   cm_getprop_echo },
        DEF_PL_HANDLER(echo),
        DEF_PL_HANDLER(version),
        DEF_PL_HANDLER(ifilist),
        DEF_PL_HANDLER(ifi),
        DEF_PL_HANDLER(ifi_ra_timer),
        DEF_PL_HANDLER(rai),
        DEF_PL_HANDLER(rti),
        DEF_PL_HANDLER(pfx),
        DEF_PL_HANDLER(rdnss),
        DEF_PL_HANDLER(dnssl),
        DEF_PL_HANDLER(pref64),
};

static int
cm_getprop_echo(struct ctrl_msg_pl *cp)
{

        syslog(LOG_DEBUG, "<%s> enter", __func__);
        cp->cp_val = strdup("");
        cp->cp_val_len = strlen(cp->cp_val) + 1;

        return (0);
}

static int
cm_getprop_version(struct ctrl_msg_pl *cp)
{

        syslog(LOG_DEBUG, "<%s> enter", __func__);
        cp->cp_val = strdup(CM_VERSION_STR);
        cp->cp_val_len = strlen(cp->cp_val) + 1;

        return (0);
}

static int
cm_getprop_ifilist(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        char *p;
        size_t len;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        len = 0;
        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                len += strlen(ifi->ifi_ifname) + 1;
        }

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        p = malloc(len);
        if (p == NULL)
                exit(1);
        memset(p, 0, len);
        cp->cp_val = p;

        if (len > 0)
                TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                        syslog(LOG_DEBUG, "<%s> add ifname=%s(%d)",
                            __func__, ifi->ifi_ifname, ifi->ifi_ifindex);
                        strcpy(p, ifi->ifi_ifname);
                        p += strlen(ifi->ifi_ifname) + 1;
                }
        cp->cp_val_len = p - cp->cp_val;

        return (0);
}

static int
cm_getprop_ifi(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        char *p;
        size_t len;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }

        p = malloc(sizeof(*ifi));
        if (p == NULL)
                exit(1);
        len = cm_str2bin(p, ifi, sizeof(*ifi));

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        if (len == 0)
                return (1);

        cp->cp_val = p;
        cp->cp_val_len = len;

        return (0);
}

static int
cm_getprop_rai(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        char *p;
        size_t len;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if ((rai = ifi->ifi_rainfo) == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }

        p = malloc(sizeof(*rai));
        if (p == NULL)
                exit(1);
        len = cm_str2bin(p, rai, sizeof(*rai));

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        if (len == 0)
                return (1);

        cp->cp_val = p;
        cp->cp_val_len = len;

        return (0);
}

static int
cm_getprop_ifi_ra_timer(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        struct rtadvd_timer     *rtimer;
        char *p;
        size_t len;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if ((rai = ifi->ifi_rainfo) == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if ((rtimer = ifi->ifi_ra_timer) == NULL) {
                syslog(LOG_ERR, "<%s> %s has no ifi_ra_timer", __func__,
                    cp->cp_ifname);
                return (1);
        }
        p = malloc(sizeof(*rtimer));
        if (p == NULL)
                exit(1);
        len = cm_str2bin(p, rtimer, sizeof(*rtimer));

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        if (len == 0)
                return (1);

        cp->cp_val = p;
        cp->cp_val_len = len;

        return (0);
}

static int
cm_getprop_rti(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        struct rtinfo *rti;
        char *p;
        size_t len;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        len = 0;
        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if (ifi->ifi_rainfo == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }
        rai = ifi->ifi_rainfo;
        TAILQ_FOREACH(rti, &rai->rai_route, rti_next) {
                len += sizeof(*rti);
        }

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        p = malloc(len);
        if (p == NULL)
                exit(1);
        memset(p, 0, len);
        cp->cp_val = p;

        if (len > 0)
                TAILQ_FOREACH(rti, &rai->rai_route, rti_next) {
                        memcpy(p, rti, sizeof(*rti));
                        p += sizeof(*rti);
                }
        cp->cp_val_len = p - cp->cp_val;

        return (0);
}

static int
cm_getprop_pfx(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        struct prefix *pfx;
        char *p;
        size_t len;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        len = 0;
        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if (ifi->ifi_rainfo == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }
        rai = ifi->ifi_rainfo;
        TAILQ_FOREACH(pfx, &rai->rai_prefix, pfx_next) {
                len += sizeof(*pfx);
        }

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        p = malloc(len);
        if (p == NULL)
                exit(1);
        memset(p, 0, len);
        cp->cp_val = p;

        if (len > 0)
                TAILQ_FOREACH(pfx, &rai->rai_prefix, pfx_next) {
                        memcpy(p, pfx, sizeof(*pfx));
                        p += sizeof(*pfx);
                }
        cp->cp_val_len = p - cp->cp_val;

        return (0);
}

static int
cm_getprop_rdnss(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        struct rdnss *rdn;
        struct rdnss_addr *rda;
        char *p;
        size_t len;
        uint16_t *rdn_cnt;
        uint16_t *rda_cnt;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        len = 0;
        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if (ifi->ifi_rainfo == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }
        rai = ifi->ifi_rainfo;

        len = sizeof(*rdn_cnt);
        TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
                len += sizeof(*rdn);
                len += sizeof(*rda_cnt);
                TAILQ_FOREACH(rda, &rdn->rd_list, ra_next) {
                        len += sizeof(*rda);
                }
        }

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        p = malloc(len);
        if (p == NULL)
                exit(1);
        memset(p, 0, len);
        cp->cp_val = p;

        rdn_cnt = (uint16_t *)p;
        p += sizeof(*rdn_cnt);
        TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
                *rdn_cnt += 1;
                memcpy(p, rdn, sizeof(*rdn));
                p += sizeof(*rdn);

                rda_cnt = (uint16_t *)p;
                p += sizeof(*rda_cnt);
                TAILQ_FOREACH(rda, &rdn->rd_list, ra_next) {
                        *rda_cnt += 1;
                        memcpy(p, rda, sizeof(*rda));
                        p += sizeof(*rda);
                }
        }
        syslog(LOG_DEBUG, "<%s> rdn_cnt = %d", __func__, *rdn_cnt);
        cp->cp_val_len = p - cp->cp_val;

        return (0);
}

static int
cm_getprop_dnssl(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        struct dnssl *dns;
        struct dnssl_addr *dna;
        char *p;
        size_t len;
        uint16_t *dns_cnt;
        uint16_t *dna_cnt;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        len = 0;
        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if (ifi->ifi_rainfo == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }
        rai = ifi->ifi_rainfo;

        len = sizeof(*dns_cnt);
        TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
                len += sizeof(*dns);
                len += sizeof(*dna_cnt);
                TAILQ_FOREACH(dna, &dns->dn_list, da_next) {
                        len += sizeof(*dna);
                }
        }

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        p = malloc(len);
        if (p == NULL)
                exit(1);
        memset(p, 0, len);
        cp->cp_val = p;

        dns_cnt = (uint16_t *)cp->cp_val;
        p += sizeof(*dns_cnt);
        TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
                (*dns_cnt)++;
                memcpy(p, dns, sizeof(*dns));
                p += sizeof(*dns);

                dna_cnt = (uint16_t *)p;
                p += sizeof(*dna_cnt);
                TAILQ_FOREACH(dna, &dns->dn_list, da_next) {
                        (*dna_cnt)++;
                        memcpy(p, dna, sizeof(*dna));
                        p += sizeof(*dna);
                }
        }
        cp->cp_val_len = p - cp->cp_val;

        return (0);
}

static int
cm_getprop_pref64(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;
        struct rainfo *rai;
        struct pref64 *prf64;
        char *p;
        size_t len;
        uint16_t *prf64_cnt;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        len = 0;
        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }
        if (ifi->ifi_rainfo == NULL) {
                syslog(LOG_ERR, "<%s> %s has no rainfo", __func__,
                    cp->cp_ifname);
                return (1);
        }
        rai = ifi->ifi_rainfo;

        len = sizeof(*prf64_cnt);
        TAILQ_FOREACH(prf64, &rai->rai_pref64, p64_next)
                len += sizeof(*prf64);

        syslog(LOG_DEBUG, "<%s> len = %zu", __func__, len);

        p = malloc(len);
        if (p == NULL)
                exit(1);
        memset(p, 0, len);
        cp->cp_val = p;

        prf64_cnt = (uint16_t *)cp->cp_val;
        p += sizeof(*prf64_cnt);
        TAILQ_FOREACH(prf64, &rai->rai_pref64, p64_next) {
                (*prf64_cnt)++;
                memcpy(p, prf64, sizeof(*prf64));
                p += sizeof(*prf64);
        }
        cp->cp_val_len = p - cp->cp_val;

        return (0);
}


int
cm_getprop(struct ctrl_msg_pl *cp)
{
        size_t i;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        if (cp == NULL)
                return (1);

        for (i = 0;
             i < nitems(getprop_dtable);
             i++) {
                if (strcmp(cp->cp_key, getprop_dtable[i].dt_comm) == 0)
                        return (getprop_dtable[i].dt_act(cp));
        }
        return (1);
}

int
cm_setprop(struct ctrl_msg_pl *cp)
{
        syslog(LOG_DEBUG, "<%s> enter", __func__);

        if (cp == NULL || cp->cp_key == NULL)
                return (1);

        if (strncmp(cp->cp_key, "reload", sizeof("reload")) == 0)
                cm_setprop_reload(cp);
        else if (strncmp(cp->cp_key, "shutdown", sizeof("shutdown")) == 0)
                set_do_shutdown(0);
        else if (strncmp(cp->cp_key, "enable", sizeof("enable")) == 0)
                cm_setprop_enable(cp);
        else if (strncmp(cp->cp_key, "disable", sizeof("disable")) == 0)
                cm_setprop_disable(cp);
        else if (strncmp(cp->cp_key, "echo", 8) == 0)
                ;               /* do nothing */
        else
                return (1);

        return (0);
}

static int
cm_setprop_reload(struct ctrl_msg_pl *cp)
{

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        set_do_reload_ifname(cp->cp_ifname);
        set_do_reload(1);

        return (0);
}

static int
cm_setprop_enable(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }

        ifi->ifi_persist = 1;
        set_do_reload_ifname(ifi->ifi_ifname);
        set_do_reload(0);

        return (0);
}

static int
cm_setprop_disable(struct ctrl_msg_pl *cp)
{
        struct ifinfo *ifi;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
                if (strcmp(cp->cp_ifname, ifi->ifi_ifname) == 0)
                        break;
        }
        if (ifi == NULL) {
                syslog(LOG_ERR, "<%s> %s not found", __func__,
                    cp->cp_ifname);
                return (1);
        }

        if (ifi->ifi_persist == 1) {
                ifi->ifi_persist = 0;
                rm_ifinfo(ifi);

                /* MC leaving needed here */
                sock_mc_leave(&sock, ifi->ifi_ifindex);

                set_do_reload_ifname(ifi->ifi_ifname);
                set_do_reload(0);
        }

        return (0);
}

int
cm_handler_server(int fd)
{
        int state;
        char *msg;
        struct ctrl_msg_hdr *cm;
        struct ctrl_msg_pl cp;
        char buf[CM_MSG_MAXLEN];
        char pbuf[CM_MSG_MAXLEN];
        int error;

        syslog(LOG_DEBUG, "<%s> enter", __func__);

        memset(buf, 0, sizeof(buf));
        memset(pbuf, 0, sizeof(pbuf));
        cm = (struct ctrl_msg_hdr *)buf;
        msg = (char *)buf + sizeof(*cm);

        state = CM_STATE_INIT;
        while (state != CM_STATE_EOM) {
                syslog(LOG_DEBUG, "<%s> state = %d", __func__, state);

                switch (state) {
                case CM_STATE_INIT:
                        state = CM_STATE_MSG_RECV;
                        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_EOM;
                        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:
                                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);
                        }
                        state = CM_STATE_EOM;
                        break;
                case CM_STATE_MSG_RECV:
                        error = cm_recv(fd, buf);

                        if (error) {
                                syslog(LOG_ERR,
                                    "<%s> cm_recv()", __func__);
                                close(fd);
                                return (-1);
                        }
                        memset(&cp, 0, sizeof(cp));

                        syslog(LOG_DEBUG,
                            "<%s> cm->cm_type = %d", __func__, cm->cm_type);
                        syslog(LOG_DEBUG,
                            "<%s> cm->cm_len = %zu", __func__, cm->cm_len);

                        switch (cm->cm_type) {
                        case CM_TYPE_EOM:
                                state = CM_STATE_EOM;
                        case CM_TYPE_NUL:
                                cm->cm_type = CM_TYPE_ACK;
                                cm->cm_len = sizeof(*cm);
                                break;
                        case CM_TYPE_REQ_GET_PROP:
                                cm_bin2pl(msg, &cp);
                                error = cm_getprop(&cp);
                                if (error) {
                                        cm->cm_type = CM_TYPE_ERR;
                                        cm->cm_len = sizeof(*cm);
                                } else {
                                        cm->cm_type = CM_TYPE_ACK;
                                        cm->cm_len = sizeof(*cm);
                                        cm->cm_len += cm_pl2bin(msg, &cp);
                                }
                                if (cp.cp_val != NULL)
                                        free(cp.cp_val);
                                break;
                        case CM_TYPE_REQ_SET_PROP:
                                cm_bin2pl(msg, &cp);
                                error = cm_setprop(&cp);
                                if (error) {
                                        cm->cm_type = CM_TYPE_ERR;
                                        cm->cm_len = sizeof(*cm);
                                } else {
                                        cm->cm_type = CM_TYPE_ACK;
                                        cm->cm_len = sizeof(*cm);
                                }
                                break;
                        default:
                                cm->cm_type = CM_TYPE_ERR;
                                cm->cm_len = sizeof(*cm);
                        }

                        switch (cm->cm_type) {
                        case CM_TYPE_ERR:
                        case CM_TYPE_ACK:
                                state = CM_STATE_MSG_DISPATCH;
                                break;
                        }
                }
        }
        syslog(LOG_DEBUG, "<%s> leave", __func__);

        return (0);
}