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
33static int
34udp_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
41static int
42udp_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 */
54static int
55udp_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 */
72static int
73udp_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 */
95mod_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
162int udp_propinfo_count = A_CNT(udp_propinfo_tbl);
163