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/* $OpenBSD: privsep.c,v 1.50 2017/06/24 23:32:57 krw Exp $ */
/*
* Copyright (c) 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE, ABUSE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/queue.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <errno.h>
#include <imsg.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include "dhcp.h"
#include "dhcpd.h"
#include "log.h"
#include "privsep.h"
int
dispatch_imsg(struct interface_info *ifi, struct imsgbuf *ibuf)
{
struct imsg imsg;
ssize_t n;
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("dispatch_imsg: imsg_get failure");
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_DELETE_ADDRESS:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_delete_address))
log_warnx("bad IMSG_DELETE_ADDRESS");
else
priv_delete_address(ifi, imsg.data);
break;
case IMSG_ADD_ADDRESS:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_add_address))
log_warnx("bad IMSG_ADD_ADDRESS");
else
priv_add_address(ifi, imsg.data);
break;
case IMSG_FLUSH_ROUTES:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_flush_routes))
log_warnx("bad IMSG_FLUSH_ROUTES");
else
priv_flush_routes(ifi, imsg.data);
break;
case IMSG_ADD_ROUTE:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_add_route))
log_warnx("bad IMSG_ADD_ROUTE");
else
priv_add_route(ifi, imsg.data);
break;
case IMSG_SET_INTERFACE_MTU:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_set_interface_mtu))
log_warnx("bad IMSG_SET_INTERFACE_MTU");
else
priv_set_interface_mtu(ifi, imsg.data);
break;
case IMSG_WRITE_RESOLV_CONF:
if (imsg.hdr.len <= IMSG_HEADER_SIZE)
log_warnx("short IMSG_WRITE_RESOLV_CONF");
else
priv_write_resolv_conf(ifi, imsg.data,
imsg.hdr.len - IMSG_HEADER_SIZE);
break;
case IMSG_HUP:
if (imsg.hdr.len != IMSG_HEADER_SIZE)
log_warnx("bad IMSG_HUP");
else {
imsg_free(&imsg);
return 1;
}
break;
default:
log_warnx("received unknown message, code %u",
imsg.hdr.type);
}
imsg_free(&imsg);
}
return 0;
}
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