/*
 * 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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/stream.h>
#define	_SUN_TPI_VERSION 2
#include <sys/tihdr.h>
#include <sys/socket.h>
#include <sys/xti_xtiopt.h>
#include <sys/xti_inet.h>

#include <inet/common.h>
#include <netinet/ip6.h>
#include <inet/ip.h>

#include <netinet/in.h>
#include <netinet/tcp.h>
#include <inet/optcom.h>


extern int	tcp_opt_default(queue_t *q, int level, int name, uchar_t *ptr);
extern int	tcp_tpi_opt_get(queue_t *q, int level, int name, uchar_t *ptr);
extern int	tcp_tpi_opt_set(queue_t *q, uint_t optset_context, int level,
    int name, uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp,
    void *thisdg_attrs, cred_t *cr, mblk_t *mblk);

/*
 * Table of all known options handled on a TCP protocol stack.
 *
 * Note: This table contains options processed by both TCP and IP levels
 *       and is the superset of options that can be performed on a TCP over IP
 *       stack.
 */
opdes_t	tcp_opt_arr[] = {

{ SO_LINGER,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (struct linger), 0 },

{ SO_DEBUG,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_KEEPALIVE,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_DONTROUTE,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_USELOOPBACK, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0
	},
{ SO_BROADCAST,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_REUSEADDR, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_OOBINLINE, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_TYPE,	SOL_SOCKET, OA_R, OA_R, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_SNDBUF,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_RCVBUF,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ SO_SNDTIMEO,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (struct timeval), 0 },
{ SO_RCVTIMEO,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (struct timeval), 0 },
{ SO_DGRAM_ERRIND, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0
	},
{ SO_SND_COPYAVOID, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
{ SO_ANON_MLP, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int),
	0 },
{ SO_MAC_EXEMPT, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int),
	0 },
{ SO_MAC_IMPLICIT, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int),
	0 },
{ SO_ALLZONES, SOL_SOCKET, OA_R, OA_RW, OP_CONFIG, OP_PASSNEXT, sizeof (int),
	0 },
{ SO_EXCLBIND, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },

{ SO_DOMAIN,	SOL_SOCKET, OA_R, OA_R, OP_NP, OP_PASSNEXT, sizeof (int), 0 },

{ SO_PROTOTYPE,	SOL_SOCKET, OA_R, OA_R, OP_NP, OP_PASSNEXT, sizeof (int), 0 },

{ TCP_NODELAY,	IPPROTO_TCP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0
	},
{ TCP_MAXSEG,	IPPROTO_TCP, OA_R, OA_R, OP_NP, OP_PASSNEXT, sizeof (uint_t),
	536 },

{ TCP_NOTIFY_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_DEF_FN), sizeof (int), -1 /* not initialized */ },

{ TCP_ABORT_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_DEF_FN), sizeof (int), -1 /* not initialized */ },

{ TCP_CONN_NOTIFY_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_DEF_FN), sizeof (int), -1 /* not initialized */ },

{ TCP_CONN_ABORT_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_DEF_FN), sizeof (int), -1 /* not initialized */ },

{ TCP_RECVDSTADDR, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int),
	0 },

{ TCP_ANONPRIVBIND, IPPROTO_TCP, OA_R, OA_RW, OP_PRIVPORT, OP_PASSNEXT,
	sizeof (int), 0 },

{ TCP_EXCLBIND, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0
	},

{ TCP_INIT_CWND, IPPROTO_TCP, OA_RW, OA_RW, OP_CONFIG, OP_PASSNEXT,
	sizeof (int), 0 },

{ TCP_KEEPALIVE_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0	},

{ TCP_KEEPALIVE_ABORT_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0	},

{ TCP_CORK, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },

{ IP_OPTIONS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT),
	IP_MAX_OPT_LENGTH + IP_ADDR_LEN, -1 /* not initialized */ },
{ T_IP_OPTIONS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT),
	IP_MAX_OPT_LENGTH + IP_ADDR_LEN, -1 /* not initialized */ },

{ IP_TOS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ T_IP_TOS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int), 0 },
{ IP_TTL,	IPPROTO_IP, OA_RW, OA_RW, OP_NP, (OP_PASSNEXT|OP_DEF_FN),
	sizeof (int), -1 /* not initialized */ },

{ IP_SEC_OPT, IPPROTO_IP, OA_RW, OA_RW, OP_NP, (OP_PASSNEXT|OP_NODEFAULT),
	sizeof (ipsec_req_t), -1 /* not initialized */ },

{ IP_BOUND_IF, IPPROTO_IP, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int),	0 /* no ifindex */ },

{ IP_UNSPEC_SRC, IPPROTO_IP, OA_R, OA_RW, OP_RAW, OP_PASSNEXT,
	sizeof (int), 0 },

{ IPV6_UNICAST_HOPS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, (OP_PASSNEXT|OP_DEF_FN),
	sizeof (int), -1 /* not initialized */ },

{ IPV6_BOUND_IF, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int),	0 /* no ifindex */ },

{ IP_NEXTHOP, IPPROTO_IP, OA_R, OA_RW, OP_CONFIG, OP_PASSNEXT,
	sizeof (in_addr_t),	-1 /* not initialized  */ },

{ IPV6_UNSPEC_SRC, IPPROTO_IPV6, OA_R, OA_RW, OP_RAW, OP_PASSNEXT,
	sizeof (int), 0 },

{ IPV6_PKTINFO, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_NODEFAULT|OP_VARLEN),
	sizeof (struct in6_pktinfo), -1 /* not initialized */ },
{ IPV6_NEXTHOP, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_NODEFAULT),
	sizeof (sin6_t), -1 /* not initialized */ },
{ IPV6_HOPOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT), 255*8,
	-1 /* not initialized */ },
{ IPV6_DSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT), 255*8,
	-1 /* not initialized */ },
{ IPV6_RTHDRDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT), 255*8,
	-1 /* not initialized */ },
{ IPV6_RTHDR, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT), 255*8,
	-1 /* not initialized */ },
{ IPV6_TCLASS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_NODEFAULT),
	sizeof (int), -1 /* not initialized */ },
{ IPV6_PATHMTU, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
	(OP_PASSNEXT|OP_NODEFAULT),
	sizeof (struct ip6_mtuinfo), -1 /* not initialized */ },
{ IPV6_USE_MIN_MTU, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_V6ONLY, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },

/* Enable receipt of ancillary data */
{ IPV6_RECVPKTINFO, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_RECVHOPLIMIT, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_RECVHOPOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ _OLD_IPV6_RECVDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_RECVDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_RECVRTHDR, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_RECVRTHDRDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },
{ IPV6_RECVTCLASS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (int), 0 },

{ IPV6_SEC_OPT, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, (OP_PASSNEXT|OP_NODEFAULT),
	sizeof (ipsec_req_t), -1 /* not initialized */ },
{ IPV6_SRC_PREFERENCES, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,
	sizeof (uint32_t), IPV6_PREFER_SRC_DEFAULT },
};

/*
 * Table of all supported levels
 * Note: Some levels (e.g. XTI_GENERIC) may be valid but may not have
 * any supported options so we need this info separately.
 *
 * This is needed only for topmost tpi providers and is used only by
 * XTI interfaces.
 */
optlevel_t	tcp_valid_levels_arr[] = {
	XTI_GENERIC,
	SOL_SOCKET,
	IPPROTO_TCP,
	IPPROTO_IP,
	IPPROTO_IPV6
};


#define	TCP_OPT_ARR_CNT		A_CNT(tcp_opt_arr)
#define	TCP_VALID_LEVELS_CNT	A_CNT(tcp_valid_levels_arr)

uint_t tcp_max_optsize; /* initialized when TCP driver is loaded */

/*
 * Initialize option database object for TCP
 *
 * This object represents database of options to search passed to
 * {sock,tpi}optcom_req() interface routine to take care of option
 * management and associated methods.
 */

optdb_obj_t tcp_opt_obj = {
	tcp_opt_default,	/* TCP default value function pointer */
	tcp_tpi_opt_get,	/* TCP get function pointer */
	tcp_tpi_opt_set,	/* TCP set function pointer */
	B_TRUE,			/* TCP is tpi provider */
	TCP_OPT_ARR_CNT,	/* TCP option database count of entries */
	tcp_opt_arr,		/* TCP option database */
	TCP_VALID_LEVELS_CNT,	/* TCP valid level count of entries */
	tcp_valid_levels_arr	/* TCP valid level array */
};