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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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _PACKET_H
#define _PACKET_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/dhcp.h>
#include <netinet/dhcp6.h>
#include <dhcp_impl.h>
#include "common.h"
/*
* packet.[ch] contain routines for manipulating, setting, and
* transmitting DHCP/BOOTP packets. see packet.c for descriptions on
* how to use the exported functions.
*/
#ifdef __cplusplus
extern "C" {
#endif
/*
* data type for recv_pkt(). needed because we may want to wait for
* several kinds of packets at once, and the existing enumeration of
* DHCP packet types does not provide a way to do that easily. here,
* we light a different bit in the enumeration for each type of packet
* we want to receive.
*
* Note that for DHCPv6, types 4 (CONFIRM), 5 (RENEW), 6 (REBIND), 12
* (RELAY-FORW, and 13 (RELAY-REPL) are not in the table. They're never
* received by a client, so there's no reason to process them. (SOLICIT,
* REQUEST, DECLINE, RELEASE, and INFORMATION-REQUEST are also never seen by
* clients, but are included for consistency.)
*
* Note also that the symbols are named for the DHCPv4 message types, and that
* DHCPv6 has analogous message types.
*/
typedef enum {
DHCP_PUNTYPED = 0x001, /* untyped (BOOTP) message */
DHCP_PDISCOVER = 0x002, /* in v6: SOLICIT (1) */
DHCP_POFFER = 0x004, /* in v6: ADVERTISE (2) */
DHCP_PREQUEST = 0x008, /* in v6: REQUEST (3) */
DHCP_PDECLINE = 0x010, /* in v6: DECLINE (9) */
DHCP_PACK = 0x020, /* in v6: REPLY (7), status == 0 */
DHCP_PNAK = 0x040, /* in v6: REPLY (7), status != 0 */
DHCP_PRELEASE = 0x080, /* in v6: RELEASE (8) */
DHCP_PINFORM = 0x100, /* in v6: INFORMATION-REQUEST (11) */
DHCP_PRECONFIG = 0x200 /* v6 only: RECONFIGURE (10) */
} dhcp_message_type_t;
/*
* A dhcp_pkt_t is used by the output-side packet manipulation functions.
* While the structure is not strictly necessary, it allows a better separation
* of functionality since metadata about the packet (such as its current
* length) is stored along with the packet.
*
* Note that 'pkt' points to a dhcpv6_message_t if the packet is IPv6.
*/
typedef struct dhcp_pkt_s {
PKT *pkt; /* the real underlying packet */
unsigned int pkt_max_len; /* its maximum length */
unsigned int pkt_cur_len; /* its current length */
boolean_t pkt_isv6;
} dhcp_pkt_t;
/*
* a `stop_func_t' is used by parts of dhcpagent that use the
* retransmission capability of send_pkt(). this makes it so the
* callers of send_pkt() decide when to stop retransmitting, which
* makes more sense than hardcoding their instance-specific cases into
* packet.c
*/
typedef boolean_t stop_func_t(dhcp_smach_t *, unsigned int);
/*
* Default I/O and interface control sockets.
*/
extern int v6_sock_fd;
extern int v4_sock_fd;
extern const in6_addr_t ipv6_all_dhcp_relay_and_servers;
extern const in6_addr_t my_in6addr_any;
PKT_LIST *alloc_pkt_entry(size_t, boolean_t);
void free_pkt_entry(PKT_LIST *);
void free_pkt_list(PKT_LIST **);
uchar_t pkt_recv_type(const PKT_LIST *);
uint_t pkt_get_xid(const PKT *, boolean_t);
dhcp_pkt_t *init_pkt(dhcp_smach_t *, uchar_t);
boolean_t remove_pkt_opt(dhcp_pkt_t *, uint_t);
boolean_t update_v6opt_len(dhcpv6_option_t *, int);
void *add_pkt_opt(dhcp_pkt_t *, uint_t, const void *, uint_t);
void *add_pkt_subopt(dhcp_pkt_t *, dhcpv6_option_t *, uint_t,
const void *, uint_t);
void *add_pkt_opt16(dhcp_pkt_t *, uint_t, uint16_t);
void *add_pkt_opt32(dhcp_pkt_t *, uint_t, uint32_t);
void *add_pkt_prl(dhcp_pkt_t *, dhcp_smach_t *);
boolean_t add_pkt_lif(dhcp_pkt_t *, dhcp_lif_t *, int, const char *);
void stop_pkt_retransmission(dhcp_smach_t *);
void retransmit_now(dhcp_smach_t *);
PKT_LIST *recv_pkt(int, int, boolean_t, boolean_t);
boolean_t pkt_v4_match(uchar_t, dhcp_message_type_t);
void pkt_smach_enqueue(dhcp_smach_t *, PKT_LIST *);
boolean_t send_pkt(dhcp_smach_t *, dhcp_pkt_t *, in_addr_t,
stop_func_t *);
boolean_t send_pkt_v6(dhcp_smach_t *, dhcp_pkt_t *, in6_addr_t,
stop_func_t *, uint_t, uint_t);
boolean_t dhcp_ip_default(void);
#ifdef __cplusplus
}
#endif
#endif /* _PACKET_H */
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