/*

 * 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 2006 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#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_opt_get(queue_t *q, int level, int name, uchar_t *ptr);

extern int	tcp_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_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),

{ SO_MAC_EXEMPT, SOL_SOCKET, OA_RW, OA_RW, OP_NP, OP_PASSNEXT, sizeof (int),

{ 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),

	40, -1 /* not initialized */ },

{ T_IP_OPTIONS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP,

	(OP_PASSNEXT|OP_VARLEN|OP_NODEFAULT),

	40, -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_RW, OA_RW, OP_CONFIG, OP_PASSNEXT,

	sizeof (in_addr_t),	-1 /* not initialized  */ },

{ IPV6_BOUND_PIF, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_PASSNEXT,

	sizeof (int),	0 /* no ifindex */ },

{ 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_opt_get,		/* TCP get function pointer */

	tcp_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 */

};