/*-
* 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/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 "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_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),
};
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);
}
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 < sizeof(getprop_dtable) / sizeof(getprop_dtable[0]);
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);
}
plain