/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 1996-2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
 */

/*
 * dhcp.h - Generic DHCP definitions, as per RFC's 2131 and 2132.
 */

#ifndef _DHCP_H
#define _DHCP_H

#ifdef  __cplusplus
extern "C" {
#endif

#ifdef  _REENTRANT
#include <thread.h>
#endif  /* _REENTRANT */

/*
 * DHCP option codes.
 */

#define CD_PAD                  0
#define CD_END                  255
#define CD_SUBNETMASK           1
#define CD_TIMEOFFSET           2
#define CD_ROUTER               3
#define CD_TIMESERV             4
#define CD_IEN116_NAME_SERV     5
#define CD_DNSSERV              6
#define CD_LOG_SERV             7
#define CD_COOKIE_SERV          8
#define CD_LPR_SERV             9
#define CD_IMPRESS_SERV         10
#define CD_RESOURCE_SERV        11
#define CD_HOSTNAME             12
#define CD_BOOT_SIZE            13
#define CD_DUMP_FILE            14
#define CD_DNSDOMAIN            15
#define CD_SWAP_SERV            16
#define CD_ROOT_PATH            17
#define CD_EXTEND_PATH          18

/* IP layer parameters */
#define CD_IP_FORWARDING_ON     19
#define CD_NON_LCL_ROUTE_ON     20
#define CD_POLICY_FILTER        21
#define CD_MAXIPSIZE            22
#define CD_IPTTL                23
#define CD_PATH_MTU_TIMEOUT     24
#define CD_PATH_MTU_TABLE_SZ    25

/* IP layer parameters per interface */
#define CD_MTU                  26
#define CD_ALL_SUBNETS_LCL_ON   27
#define CD_BROADCASTADDR        28
#define CD_MASK_DISCVRY_ON      29
#define CD_MASK_SUPPLIER_ON     30
#define CD_ROUTER_DISCVRY_ON    31
#define CD_ROUTER_SOLICIT_SERV  32
#define CD_STATIC_ROUTE         33

/* Link Layer Parameters per Interface */
#define CD_TRAILER_ENCAPS_ON    34
#define CD_ARP_TIMEOUT          35
#define CD_ETHERNET_ENCAPS_ON   36

/* TCP Parameters */
#define CD_TCP_TTL              37
#define CD_TCP_KALIVE_INTVL     38
#define CD_TCP_KALIVE_GRBG_ON   39

/* Application layer parameters */
#define CD_NIS_DOMAIN           40
#define CD_NIS_SERV             41
#define CD_NTP_SERV             42
#define CD_VENDOR_SPEC          43

/* NetBIOS parameters */
#define CD_NETBIOS_NAME_SERV    44
#define CD_NETBIOS_DIST_SERV    45
#define CD_NETBIOS_NODE_TYPE    46
#define CD_NETBIOS_SCOPE        47

/* X Window parameters */
#define CD_XWIN_FONT_SERV       48
#define CD_XWIN_DISP_SERV       49

/* DHCP protocol extension options */
#define CD_REQUESTED_IP_ADDR    50
#define CD_LEASE_TIME           51
#define CD_OPTION_OVERLOAD      52
#define CD_DHCP_TYPE            53
#define CD_SERVER_ID            54
#define CD_REQUEST_LIST         55
#define CD_MESSAGE              56
#define CD_MAX_DHCP_SIZE        57
#define CD_T1_TIME              58
#define CD_T2_TIME              59
#define CD_CLASS_ID             60
#define CD_CLIENT_ID            61

/* Netware options */
#define CD_NW_IP_DOMAIN         62
#define CD_NW_IP_OPTIONS        63

/* Nisplus options */
#define CD_NISPLUS_DMAIN        64
#define CD_NISPLUS_SERVS        65

/* Optional sname/bootfile options */
#define CD_TFTP_SERV_NAME       66
#define CD_OPT_BOOTFILE_NAME    67

/* Additional server options */
#define CD_MOBILE_IP_AGENT      68
#define CD_SMTP_SERVS           69
#define CD_POP3_SERVS           70
#define CD_NNTP_SERVS           71
#define CD_WWW_SERVS            72
#define CD_FINGER_SERVS         73
#define CD_IRC_SERVS            74

/* Streettalk options */
#define CD_STREETTALK_SERVS     75
#define CD_STREETTALK_DA_SERVS  76

/* User class identifier */
#define CD_USER_CLASS_ID        77

/* Newer options */

#define CD_SLPDA                78
#define CD_SLPSS                79
#define CD_CLIENTFQDN           81
#define CD_AGENTOPT             82

/*
 * Per RFC 3679, option 89 was "Never published as standard and [is] not in
 * general use". See active CD_CLIENTFQDN and RFC 4702.
 */
#define CD_FQDN                 89

#define CD_PXEARCHi             93
#define CD_PXENIIi              94
#define CD_PXECID               95
#define CD_MULTICST             107

#define DHCP_FIRST_OPT          CD_SUBNETMASK
#define DHCP_LAST_STD           CD_MULTICST
#define DHCP_SITE_OPT           128             /* inclusive */
#define DHCP_END_SITE           254
#define DHCP_LAST_OPT           DHCP_END_SITE   /* last op code */

#define DHCP_MAX_OPT_SIZE       255     /* maximum option size in octets */

/*
 * DHCP Packet. What will fit in a ethernet frame. We may use a smaller
 * size, based on what our transport can handle.
 */
#define DHCP_DEF_MAX_SIZE       576     /* as spec'ed in RFC 2131 */
#define PKT_BUFFER              1486    /* max possible size of pkt buffer */
#define BASE_PKT_SIZE           240     /* everything but the options */
typedef struct dhcp {
        uint8_t         op;             /* message opcode */
        uint8_t         htype;          /* Hardware address type */
        uint8_t         hlen;           /* Hardware address length */
        uint8_t         hops;           /* Used by relay agents */
        uint32_t        xid;            /* transaction id */
        uint16_t        secs;           /* Secs elapsed since client boot */
        uint16_t        flags;          /* DHCP Flags field */
        struct in_addr  ciaddr;         /* client IP addr */
        struct in_addr  yiaddr;         /* 'Your' IP addr. (from server) */
        struct in_addr  siaddr;         /* Boot server IP addr */
        struct in_addr  giaddr;         /* Relay agent IP addr */
        uint8_t         chaddr[16];     /* Client hardware addr */
        uint8_t         sname[64];      /* Optl. boot server hostname */
        uint8_t         file[128];      /* boot file name (ascii path) */
        uint8_t         cookie[4];      /* Magic cookie */
        uint8_t         options[60];    /* Options */
} PKT;

typedef uint32_t        lease_t; /* DHCP lease time (32 bit quantity) */

/*
 * DHCP packet types. As per protocol.
 */
#define DISCOVER        ((uint8_t)1)
#define OFFER           ((uint8_t)2)
#define REQUEST         ((uint8_t)3)
#define DECLINE         ((uint8_t)4)
#define ACK             ((uint8_t)5)
#define NAK             ((uint8_t)6)
#define RELEASE         ((uint8_t)7)
#define INFORM          ((uint8_t)8)

/*
 * Generic DHCP protocol defines
 */
#define DHCP_PERM       ((lease_t)0xffffffff)   /* "permanent" lease time */
#define BOOTREQUEST             (1)             /* BOOTP REQUEST opcode */
#define BOOTREPLY               (2)             /* BOOTP REPLY opcode */
#define BOOTMAGIC       { 99, 130, 83, 99 }     /* rfc1048 magic cookie */
#define BCAST_MASK      0x8000                  /* BROADCAST flag */

#ifdef  __cplusplus
}
#endif

#endif  /* _DHCP_H */