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 (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  24  */
  25 /* Copyright (c) 1990 Mentat Inc. */
  26 
  27 #include <inet/ip.h>
  28 #include <inet/ip6.h>
  29 #include <inet/udp_impl.h>
  30 #include <sys/sunddi.h>
  31 
  32 /*
  33  * Special checkers for smallest/largest anonymous port so they don't
  34  * ever happen to be (largest < smallest).
  35  */
  36 /* ARGSUSED */
  37 static int
  38 udp_smallest_anon_set(void *cbarg, cred_t *cr, mod_prop_info_t *pinfo,
  39     const char *ifname, const void *pval, uint_t flags)
  40 {
  41         unsigned long new_value;
  42         udp_stack_t *us = (udp_stack_t *)cbarg;
  43         int err;
  44 
  45         if ((err = mod_uint32_value(pval, pinfo, flags, &new_value)) != 0)
  46                 return (err);
  47         /* mod_uint32_value() + pinfo guarantees we're in UDP port range. */
  48         if (new_value > us->us_largest_anon_port)
  49                 return (ERANGE);
  50         pinfo->prop_cur_uval = (uint32_t)new_value;
  51         return (0);
  52 }
  53 
  54 /* ARGSUSED */
  55 static int
  56 udp_largest_anon_set(void *cbarg, cred_t *cr, mod_prop_info_t *pinfo,
  57     const char *ifname, const void *pval, uint_t flags)
  58 {
  59         unsigned long new_value;
  60         udp_stack_t *us = (udp_stack_t *)cbarg;
  61         int err;
  62 
  63         if ((err = mod_uint32_value(pval, pinfo, flags, &new_value)) != 0)
  64                 return (err);
  65         /* mod_uint32_value() + pinfo guarantees we're in UDP port range. */
  66         if (new_value < us->us_smallest_anon_port)
  67                 return (ERANGE);
  68         pinfo->prop_cur_uval = (uint32_t)new_value;
  69         return (0);
  70 }
  71 
  72 /*
  73  * All of these are alterable, within the min/max values given, at run time.
  74  *
  75  * Note: All those tunables which do not start with "_" are Committed and
  76  * therefore are public. See PSARC 2010/080.
  77  */
  78 mod_prop_info_t udp_propinfo_tbl[] = {
  79         /* tunable - 0 */
  80         { "_wroff_extra", MOD_PROTO_UDP,
  81             mod_set_uint32, mod_get_uint32,
  82             {0, 256, 32}, {32} },
  83 
  84         { "_ipv4_ttl", MOD_PROTO_UDP,
  85             mod_set_uint32, mod_get_uint32,
  86             {1, 255, 255}, {255} },
  87 
  88         { "_ipv6_hoplimit", MOD_PROTO_UDP,
  89             mod_set_uint32, mod_get_uint32,
  90             {0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS}, {IPV6_DEFAULT_HOPS} },
  91 
  92         { "smallest_nonpriv_port", MOD_PROTO_UDP,
  93             mod_set_uint32, mod_get_uint32,
  94             {1024, (32 * 1024), 1024}, {1024} },
  95 
  96         { "_do_checksum", MOD_PROTO_UDP,
  97             mod_set_boolean, mod_get_boolean,
  98             {B_TRUE}, {B_TRUE} },
  99 
 100         { "smallest_anon_port", MOD_PROTO_UDP,
 101             udp_smallest_anon_set, mod_get_uint32,
 102             {1024, ULP_MAX_PORT, (32 * 1024)}, {(32 * 1024)} },
 103 
 104         { "largest_anon_port", MOD_PROTO_UDP,
 105             udp_largest_anon_set, mod_get_uint32,
 106             {1024, ULP_MAX_PORT, ULP_MAX_PORT}, {ULP_MAX_PORT} },
 107 
 108         { "send_maxbuf", MOD_PROTO_UDP,
 109             mod_set_uint32, mod_get_uint32,
 110             {UDP_XMIT_LOWATER, (1<<30), UDP_XMIT_HIWATER},
 111             {UDP_XMIT_HIWATER} },
 112 
 113         { "_xmit_lowat", MOD_PROTO_UDP,
 114             mod_set_uint32, mod_get_uint32,
 115             {0, (1<<30), UDP_XMIT_LOWATER},
 116             {UDP_XMIT_LOWATER} },
 117 
 118         { "recv_maxbuf", MOD_PROTO_UDP,
 119             mod_set_uint32, mod_get_uint32,
 120             {UDP_RECV_LOWATER, (1<<30), UDP_RECV_HIWATER},
 121             {UDP_RECV_HIWATER} },
 122 
 123         /* tunable - 10 */
 124         { "_max_buf", MOD_PROTO_UDP,
 125             mod_set_uint32, mod_get_uint32,
 126             {65536, (1<<30), 2*1024*1024}, {2*1024*1024} },
 127 
 128         { "_pmtu_discovery", MOD_PROTO_UDP,
 129             mod_set_boolean, mod_get_boolean,
 130             {B_FALSE}, {B_FALSE} },
 131 
 132         { "_sendto_ignerr", MOD_PROTO_UDP,
 133             mod_set_boolean, mod_get_boolean,
 134             {B_FALSE}, {B_FALSE} },
 135 
 136         { "extra_priv_ports", MOD_PROTO_UDP,
 137             mod_set_extra_privports, mod_get_extra_privports,
 138             {1, ULP_MAX_PORT, 0}, {0} },
 139 
 140         { "?", MOD_PROTO_UDP, NULL, mod_get_allprop, {0}, {0} },
 141 
 142         { NULL, 0, NULL, NULL, {0}, {0} }
 143 };
 144 
 145 int udp_propinfo_count = A_CNT(udp_propinfo_tbl);