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/* $OpenBSD: privsep.c,v 1.30 2013/02/18 15:57:08 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 "dhcpd.h"
#include "privsep.h"
#include <sys/queue.h>
#include <sys/uio.h>
void
dispatch_imsg(struct imsgbuf *ibuf)
{
struct imsg imsg;
struct imsg_write_file *wfimsg;
ssize_t n;
size_t len;
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
error("dispatch_imsg: imsg_get failure: %s",
strerror(errno));
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_DELETE_ADDRESS:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_delete_address))
warning("bad IMSG_DELETE_ADDRESS");
else
priv_delete_address(imsg.data);
break;
case IMSG_ADD_ADDRESS:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_add_address))
warning("bad IMSG_ADD_ADDRESS");
else
priv_add_address(imsg.data);
break;
case IMSG_FLUSH_ROUTES:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_flush_routes))
warning("bad IMSG_FLUSH_ROUTES");
else
priv_flush_routes_and_arp_cache(imsg.data);
break;
case IMSG_ADD_DEFAULT_ROUTE:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_add_default_route))
warning("bad IMSG_ADD_DEFAULT_ROUTE");
else
priv_add_default_route(imsg.data);
break;
case IMSG_HUP:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct imsg_hup))
warning("bad IMSG_HUP");
else
ifi->flags |= IFI_HUP;
quit = SIGHUP;
break;
case IMSG_WRITE_FILE:
if (imsg.hdr.len < IMSG_HEADER_SIZE +
sizeof(struct imsg_write_file))
warning("short IMSG_WRITE_FILE");
else {
wfimsg = (struct imsg_write_file *)imsg.data;
len = imsg.hdr.len;
len -= IMSG_HEADER_SIZE;
len -= sizeof(struct imsg_write_file);
len -= wfimsg->len;
if (len == 0)
priv_write_file(wfimsg);
else
warning("bad IMSG_WRITE_FILE (%zu)",
len);
}
break;
default:
warning("received unknown message, code %d",
imsg.hdr.type);
}
imsg_free(&imsg);
}
}
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