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  * Copyright (c) 2013 by Delphix. All rights reserved.
  25  */
  26 /* Copyright (c) 1990 Mentat Inc. */
  27 
  28 #include <inet/ip.h>
  29 #include <inet/ip6.h>
  30 #include <inet/udp_impl.h>
  31 #include <sys/sunddi.h>
  32 
  33 static int
  34 udp_set_buf_prop(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
  35     const char *ifname, const void *pval, uint_t flags)
  36 {
  37         return (mod_set_buf_prop(stack->netstack_udp->us_propinfo_tbl, stack,
  38             cr, pinfo, ifname, pval, flags));
  39 }
  40 
  41 static int
  42 udp_get_buf_prop(netstack_t *stack, mod_prop_info_t *pinfo, const char *ifname,
  43     void *val, uint_t psize, uint_t flags)
  44 {
  45         return (mod_get_buf_prop(stack->netstack_udp->us_propinfo_tbl, stack,
  46             pinfo, ifname, val, psize, flags));
  47 }
  48 
  49 /*
  50  * Special checkers for smallest/largest anonymous port so they don't
  51  * ever happen to be (largest < smallest).
  52  */
  53 /* ARGSUSED */
  54 static int
  55 udp_smallest_anon_set(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
  56     const char *ifname, const void *pval, uint_t flags)
  57 {
  58         unsigned long new_value;
  59         udp_stack_t *us = stack->netstack_udp;
  60         int err;
  61 
  62         if ((err = mod_uint32_value(pval, pinfo, flags, &new_value)) != 0)
  63                 return (err);
  64         /* mod_uint32_value() + pinfo guarantees we're in UDP port range. */
  65         if (new_value > us->us_largest_anon_port)
  66                 return (ERANGE);
  67         pinfo->prop_cur_uval = (uint32_t)new_value;
  68         return (0);
  69 }
  70 
  71 /* ARGSUSED */
  72 static int
  73 udp_largest_anon_set(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
  74     const char *ifname, const void *pval, uint_t flags)
  75 {
  76         unsigned long new_value;
  77         udp_stack_t *us = stack->netstack_udp;
  78         int err;
  79 
  80         if ((err = mod_uint32_value(pval, pinfo, flags, &new_value)) != 0)
  81                 return (err);
  82         /* mod_uint32_value() + pinfo guarantees we're in UDP port range. */
  83         if (new_value < us->us_smallest_anon_port)
  84                 return (ERANGE);
  85         pinfo->prop_cur_uval = (uint32_t)new_value;
  86         return (0);
  87 }
  88 
  89 /*
  90  * All of these are alterable, within the min/max values given, at run time.
  91  *
  92  * Note: All those tunables which do not start with "_" are Committed and
  93  * therefore are public. See PSARC 2010/080.
  94  */
  95 mod_prop_info_t udp_propinfo_tbl[] = {
  96         /* tunable - 0 */
  97         { "_wroff_extra", MOD_PROTO_UDP,
  98             mod_set_uint32, mod_get_uint32,
  99             {0, 256, 32}, {32} },
 100 
 101         { "_ipv4_ttl", MOD_PROTO_UDP,
 102             mod_set_uint32, mod_get_uint32,
 103             {1, 255, 255}, {255} },
 104 
 105         { "_ipv6_hoplimit", MOD_PROTO_UDP,
 106             mod_set_uint32, mod_get_uint32,
 107             {0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS}, {IPV6_DEFAULT_HOPS} },
 108 
 109         { "smallest_nonpriv_port", MOD_PROTO_UDP,
 110             mod_set_uint32, mod_get_uint32,
 111             {1024, (32 * 1024), 1024}, {1024} },
 112 
 113         { "_do_checksum", MOD_PROTO_UDP,
 114             mod_set_boolean, mod_get_boolean,
 115             {B_TRUE}, {B_TRUE} },
 116 
 117         { "smallest_anon_port", MOD_PROTO_UDP,
 118             udp_smallest_anon_set, mod_get_uint32,
 119             {1024, ULP_MAX_PORT, (32 * 1024)}, {(32 * 1024)} },
 120 
 121         { "largest_anon_port", MOD_PROTO_UDP,
 122             udp_largest_anon_set, mod_get_uint32,
 123             {1024, ULP_MAX_PORT, ULP_MAX_PORT}, {ULP_MAX_PORT} },
 124 
 125         { "send_buf", MOD_PROTO_UDP,
 126             udp_set_buf_prop, udp_get_buf_prop,
 127             {UDP_XMIT_LOWATER, ULP_MAX_BUF, UDP_XMIT_HIWATER},
 128             {UDP_XMIT_HIWATER} },
 129 
 130         { "_xmit_lowat", MOD_PROTO_UDP,
 131             mod_set_uint32, mod_get_uint32,
 132             {0, ULP_MAX_BUF, UDP_XMIT_LOWATER},
 133             {UDP_XMIT_LOWATER} },
 134 
 135         { "recv_buf", MOD_PROTO_UDP,
 136             udp_set_buf_prop, udp_get_buf_prop,
 137             {UDP_RECV_LOWATER, ULP_MAX_BUF, UDP_RECV_HIWATER},
 138             {UDP_RECV_HIWATER} },
 139 
 140         /* tunable - 10 */
 141         { "max_buf", MOD_PROTO_UDP,
 142             mod_set_uint32, mod_get_uint32,
 143             {65536, ULP_MAX_BUF, 2*1024*1024}, {2*1024*1024} },
 144 
 145         { "_pmtu_discovery", MOD_PROTO_UDP,
 146             mod_set_boolean, mod_get_boolean,
 147             {B_FALSE}, {B_FALSE} },
 148 
 149         { "_sendto_ignerr", MOD_PROTO_UDP,
 150             mod_set_boolean, mod_get_boolean,
 151             {B_FALSE}, {B_FALSE} },
 152 
 153         { "extra_priv_ports", MOD_PROTO_UDP,
 154             mod_set_extra_privports, mod_get_extra_privports,
 155             {1, ULP_MAX_PORT, 0}, {0} },
 156 
 157         { "?", MOD_PROTO_UDP, NULL, mod_get_allprop, {0}, {0} },
 158 
 159         { NULL, 0, NULL, NULL, {0}, {0} }
 160 };
 161 
 162 int udp_propinfo_count = A_CNT(udp_propinfo_tbl);