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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #include <sys/types.h>
     27 #include <sys/stream.h>
     28 #define	_SUN_TPI_VERSION 2
     29 #include <sys/tihdr.h>
     30 #include <sys/socket.h>
     31 #include <sys/xti_xtiopt.h>
     32 #include <sys/xti_inet.h>
     33 
     34 #include <inet/common.h>
     35 #include <netinet/ip6.h>
     36 #include <inet/ip.h>
     37 
     38 #include <netinet/in.h>
     39 #include <netinet/tcp.h>
     40 #include <inet/optcom.h>
     41 
     42 #include <inet/tcp_impl.h>
     43 
     44 /*
     45  * Table of all known options handled on a TCP protocol stack.
     46  *
     47  * Note: This table contains options processed by both TCP and IP levels
     48  *       and is the superset of options that can be performed on a TCP over IP
     49  *       stack.
     50  */
     51 opdes_t	tcp_opt_arr[] = {
     52 
     53 { SO_LINGER,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0,
     54 	sizeof (struct linger), 0 },
     55 
     56 { SO_DEBUG,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     57 { SO_KEEPALIVE,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     58 { SO_DONTROUTE,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     59 { SO_USELOOPBACK, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0
     60 	},
     61 { SO_BROADCAST,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     62 { SO_REUSEADDR, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     63 { SO_OOBINLINE, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     64 { SO_TYPE,	SOL_SOCKET, OA_R, OA_R, OP_NP, 0, sizeof (int), 0 },
     65 { SO_SNDBUF,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     66 { SO_RCVBUF,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     67 { SO_SNDTIMEO,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0,
     68 	sizeof (struct timeval), 0 },
     69 { SO_RCVTIMEO,	SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0,
     70 	sizeof (struct timeval), 0 },
     71 { SO_DGRAM_ERRIND, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0
     72 	},
     73 { SO_SND_COPYAVOID, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     74 { SO_ANON_MLP, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int),
     75 	0 },
     76 { SO_MAC_EXEMPT, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int),
     77 	0 },
     78 { SO_MAC_IMPLICIT, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int),
     79 	0 },
     80 { SO_ALLZONES, SOL_SOCKET, OA_R, OA_RW, OP_CONFIG, 0, sizeof (int),
     81 	0 },
     82 { SO_EXCLBIND, SOL_SOCKET, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
     83 
     84 { SO_DOMAIN,	SOL_SOCKET, OA_R, OA_R, OP_NP, 0, sizeof (int), 0 },
     85 
     86 { SO_PROTOTYPE,	SOL_SOCKET, OA_R, OA_R, OP_NP, 0, sizeof (int), 0 },
     87 
     88 { TCP_NODELAY,	IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0
     89 	},
     90 { TCP_MAXSEG,	IPPROTO_TCP, OA_R, OA_R, OP_NP, 0, sizeof (uint_t),
     91 	536 },
     92 
     93 { TCP_NOTIFY_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
     94 	OP_DEF_FN, sizeof (int), -1 /* not initialized */ },
     95 
     96 { TCP_ABORT_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
     97 	OP_DEF_FN, sizeof (int), -1 /* not initialized */ },
     98 
     99 { TCP_CONN_NOTIFY_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
    100 	OP_DEF_FN, sizeof (int), -1 /* not initialized */ },
    101 
    102 { TCP_CONN_ABORT_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP,
    103 	OP_DEF_FN, sizeof (int), -1 /* not initialized */ },
    104 
    105 { TCP_RECVDSTADDR, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0, sizeof (int),
    106 	0 },
    107 
    108 { TCP_ANONPRIVBIND, IPPROTO_TCP, OA_R, OA_RW, OP_PRIVPORT, 0,
    109 	sizeof (int), 0 },
    110 
    111 { TCP_EXCLBIND, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0
    112 	},
    113 
    114 { TCP_INIT_CWND, IPPROTO_TCP, OA_RW, OA_RW, OP_CONFIG, 0,
    115 	sizeof (int), 0 },
    116 
    117 { TCP_KEEPALIVE_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0,
    118 	sizeof (int), 0	},
    119 
    120 { TCP_KEEPALIVE_ABORT_THRESHOLD, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0,
    121 	sizeof (int), 0	},
    122 
    123 { TCP_CORK, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
    124 
    125 { IP_OPTIONS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP,
    126 	(OP_VARLEN|OP_NODEFAULT),
    127 	IP_MAX_OPT_LENGTH + IP_ADDR_LEN, -1 /* not initialized */ },
    128 { T_IP_OPTIONS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP,
    129 	(OP_VARLEN|OP_NODEFAULT),
    130 	IP_MAX_OPT_LENGTH + IP_ADDR_LEN, -1 /* not initialized */ },
    131 
    132 { IP_TOS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
    133 { T_IP_TOS,	IPPROTO_IP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
    134 { IP_TTL,	IPPROTO_IP, OA_RW, OA_RW, OP_NP, OP_DEF_FN,
    135 	sizeof (int), -1 /* not initialized */ },
    136 
    137 { IP_SEC_OPT, IPPROTO_IP, OA_RW, OA_RW, OP_NP, OP_NODEFAULT,
    138 	sizeof (ipsec_req_t), -1 /* not initialized */ },
    139 
    140 { IP_BOUND_IF, IPPROTO_IP, OA_RW, OA_RW, OP_NP, 0,
    141 	sizeof (int),	0 /* no ifindex */ },
    142 
    143 { IP_UNSPEC_SRC, IPPROTO_IP, OA_R, OA_RW, OP_RAW, 0,
    144 	sizeof (int), 0 },
    145 
    146 { IPV6_UNICAST_HOPS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_DEF_FN,
    147 	sizeof (int), -1 /* not initialized */ },
    148 
    149 { IPV6_BOUND_IF, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    150 	sizeof (int),	0 /* no ifindex */ },
    151 
    152 { IP_DONTFRAG, IPPROTO_IP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
    153 
    154 { IP_NEXTHOP, IPPROTO_IP, OA_R, OA_RW, OP_CONFIG, 0,
    155 	sizeof (in_addr_t),	-1 /* not initialized  */ },
    156 
    157 { IPV6_UNSPEC_SRC, IPPROTO_IPV6, OA_R, OA_RW, OP_RAW, 0,
    158 	sizeof (int), 0 },
    159 
    160 { IPV6_PKTINFO, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    161 	(OP_NODEFAULT|OP_VARLEN),
    162 	sizeof (struct in6_pktinfo), -1 /* not initialized */ },
    163 { IPV6_NEXTHOP, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    164 	OP_NODEFAULT,
    165 	sizeof (sin6_t), -1 /* not initialized */ },
    166 { IPV6_HOPOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    167 	(OP_VARLEN|OP_NODEFAULT), 255*8,
    168 	-1 /* not initialized */ },
    169 { IPV6_DSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    170 	(OP_VARLEN|OP_NODEFAULT), 255*8,
    171 	-1 /* not initialized */ },
    172 { IPV6_RTHDRDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    173 	(OP_VARLEN|OP_NODEFAULT), 255*8,
    174 	-1 /* not initialized */ },
    175 { IPV6_RTHDR, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    176 	(OP_VARLEN|OP_NODEFAULT), 255*8,
    177 	-1 /* not initialized */ },
    178 { IPV6_TCLASS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    179 	OP_NODEFAULT,
    180 	sizeof (int), -1 /* not initialized */ },
    181 { IPV6_PATHMTU, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP,
    182 	OP_NODEFAULT,
    183 	sizeof (struct ip6_mtuinfo), -1 /* not initialized */ },
    184 { IPV6_DONTFRAG, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    185 	sizeof (int), 0 },
    186 { IPV6_USE_MIN_MTU, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    187 	sizeof (int), 0 },
    188 { IPV6_V6ONLY, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    189 	sizeof (int), 0 },
    190 
    191 /* Enable receipt of ancillary data */
    192 { IPV6_RECVPKTINFO, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    193 	sizeof (int), 0 },
    194 { IPV6_RECVHOPLIMIT, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    195 	sizeof (int), 0 },
    196 { IPV6_RECVHOPOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    197 	sizeof (int), 0 },
    198 { _OLD_IPV6_RECVDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    199 	sizeof (int), 0 },
    200 { IPV6_RECVDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    201 	sizeof (int), 0 },
    202 { IPV6_RECVRTHDR, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    203 	sizeof (int), 0 },
    204 { IPV6_RECVRTHDRDSTOPTS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    205 	sizeof (int), 0 },
    206 { IPV6_RECVTCLASS, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    207 	sizeof (int), 0 },
    208 
    209 { IPV6_SEC_OPT, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, OP_NODEFAULT,
    210 	sizeof (ipsec_req_t), -1 /* not initialized */ },
    211 { IPV6_SRC_PREFERENCES, IPPROTO_IPV6, OA_RW, OA_RW, OP_NP, 0,
    212 	sizeof (uint32_t), IPV6_PREFER_SRC_DEFAULT },
    213 };
    214 
    215 /*
    216  * Table of all supported levels
    217  * Note: Some levels (e.g. XTI_GENERIC) may be valid but may not have
    218  * any supported options so we need this info separately.
    219  *
    220  * This is needed only for topmost tpi providers and is used only by
    221  * XTI interfaces.
    222  */
    223 optlevel_t	tcp_valid_levels_arr[] = {
    224 	XTI_GENERIC,
    225 	SOL_SOCKET,
    226 	IPPROTO_TCP,
    227 	IPPROTO_IP,
    228 	IPPROTO_IPV6
    229 };
    230 
    231 
    232 #define	TCP_OPT_ARR_CNT		A_CNT(tcp_opt_arr)
    233 #define	TCP_VALID_LEVELS_CNT	A_CNT(tcp_valid_levels_arr)
    234 
    235 uint_t tcp_max_optsize; /* initialized when TCP driver is loaded */
    236 
    237 /*
    238  * Initialize option database object for TCP
    239  *
    240  * This object represents database of options to search passed to
    241  * {sock,tpi}optcom_req() interface routine to take care of option
    242  * management and associated methods.
    243  */
    244 
    245 optdb_obj_t tcp_opt_obj = {
    246 	tcp_opt_default,	/* TCP default value function pointer */
    247 	tcp_tpi_opt_get,	/* TCP get function pointer */
    248 	tcp_tpi_opt_set,	/* TCP set function pointer */
    249 	TCP_OPT_ARR_CNT,	/* TCP option database count of entries */
    250 	tcp_opt_arr,		/* TCP option database */
    251 	TCP_VALID_LEVELS_CNT,	/* TCP valid level count of entries */
    252 	tcp_valid_levels_arr	/* TCP valid level array */
    253 };
    254