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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
*
* INFORM_SENT state of the client state machine.
*/
#include <sys/types.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/udp.h>
#include <netinet/ip_var.h>
#include <netinet/udp_var.h>
#include <dhcpmsg.h>
#include "agent.h"
#include "states.h"
#include "interface.h"
#include "packet.h"
static boolean_t stop_informing(dhcp_smach_t *, unsigned int);
/*
* dhcp_inform(): sends an INFORM packet and sets up reception for an ACK
*
* input: dhcp_smach_t *: the state machine to use
* output: void
* note: the INFORM cannot be sent successfully if the interface
* does not have an IP address (this is mostly an issue for IPv4).
* We switch into INFORM_SENT state before sending the packet so
* that the packet-sending subsystem uses regular sockets and sets
* the source address. (See set_smach_state.)
*/
void
dhcp_inform(dhcp_smach_t *dsmp)
{
dhcp_pkt_t *dpkt;
if (!set_smach_state(dsmp, INFORM_SENT))
goto failed;
if (dsmp->dsm_isv6) {
dpkt = init_pkt(dsmp, DHCPV6_MSG_INFO_REQ);
/* Add required Option Request option */
(void) add_pkt_prl(dpkt, dsmp);
dsmp->dsm_server = ipv6_all_dhcp_relay_and_servers;
(void) send_pkt_v6(dsmp, dpkt, dsmp->dsm_server,
stop_informing, DHCPV6_INF_TIMEOUT, DHCPV6_INF_MAX_RT);
} else {
ipaddr_t server;
/*
* Assemble a DHCPREQUEST packet, without the Server ID option.
* Fill in ciaddr, since we know this. dsm_server will be set
* to the server's IP address, which will be the broadcast
* address if we don't know it. The max DHCP message size
* option is set to the interface max, minus the size of the
* UDP and IP headers.
*/
dpkt = init_pkt(dsmp, INFORM);
IN6_V4MAPPED_TO_INADDR(&dsmp->dsm_lif->lif_v6addr,
&dpkt->pkt->ciaddr);
(void) add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE,
htons(dsmp->dsm_lif->lif_pif->pif_mtu -
sizeof (struct udpiphdr)));
if (class_id_len != 0) {
(void) add_pkt_opt(dpkt, CD_CLASS_ID, class_id,
class_id_len);
}
(void) add_pkt_prl(dpkt, dsmp);
(void) add_pkt_opt(dpkt, CD_END, NULL, 0);
IN6_V4MAPPED_TO_IPADDR(&dsmp->dsm_server, server);
if (!send_pkt(dsmp, dpkt, server, stop_informing)) {
dhcpmsg(MSG_ERROR, "dhcp_inform: send_pkt failed");
goto failed;
}
}
return;
failed:
dsmp->dsm_dflags |= DHCP_IF_FAILED;
ipc_action_finish(dsmp, DHCP_IPC_E_INT);
(void) set_smach_state(dsmp, INIT);
}
/*
* stop_informing(): decides when to stop retransmitting Information-Requests
*
* input: dhcp_smach_t *: the state machine Info-Reqs are being sent from
* unsigned int: the number of requests sent so far
* output: boolean_t: B_TRUE if retransmissions should stop
*/
/* ARGSUSED */
static boolean_t
stop_informing(dhcp_smach_t *dsmp, unsigned int n_requests)
{
return (B_FALSE);
}
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