1 /*
2 * Copyright (c) 2008-2024 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /*
29 * Copyright (c) 1982, 1986, 1989, 1993
30 * The Regents of the University of California. All rights reserved.
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 * 1. Redistributions of source code must retain the above copyright
36 * notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 * notice, this list of conditions and the following disclaimer in the
39 * documentation and/or other materials provided with the distribution.
40 * 3. All advertising materials mentioning features or use of this software
41 * must display the following acknowledgement:
42 * This product includes software developed by the University of
43 * California, Berkeley and its contributors.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
61 */
62
63 #ifndef _NETINET_UDP_VAR_H_
64 #define _NETINET_UDP_VAR_H_
65
66 #include <netinet/ip_var.h>
67 #include <netinet/udp.h>
68 #include <sys/appleapiopts.h>
69 #include <sys/sysctl.h>
70
71 /*
72 * UDP kernel structures and variables.
73 */
74 struct udpiphdr {
75 struct ipovly ui_i; /* overlaid ip structure */
76 struct udphdr ui_u; /* udp header */
77 };
78 #define ui_x1 ui_i.ih_x1
79 #define ui_pr ui_i.ih_pr
80 #define ui_len ui_i.ih_len
81 #define ui_src ui_i.ih_src
82 #define ui_dst ui_i.ih_dst
83 #define ui_sport ui_u.uh_sport
84 #define ui_dport ui_u.uh_dport
85 #define ui_ulen ui_u.uh_ulen
86 #define ui_sum ui_u.uh_sum
87 #define ui_next ui_i.ih_next
88 #define ui_prev ui_i.ih_prev
89
90 struct udpstat {
91 /* input statistics: */
92 u_int32_t udps_ipackets; /* total input packets */
93 u_int32_t udps_hdrops; /* packet shorter than header */
94 u_int32_t udps_badsum; /* checksum error */
95 u_int32_t udps_badlen; /* data length larger than packet */
96 u_int32_t udps_noport; /* no socket on port */
97 u_int32_t udps_noportbcast; /* of above, arrived as broadcast */
98 u_int32_t udps_fullsock; /* not delivered, input socket full */
99 u_int32_t udpps_pcbcachemiss; /* input packets missing pcb cache */
100 u_int32_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
101 /* output statistics: */
102 u_int32_t udps_opackets; /* total output packets */
103 u_int32_t udps_fastout; /* output packets on fast path */
104 u_int32_t udps_nosum; /* no checksum */
105 u_int32_t udps_noportmcast; /* of no socket on port, multicast */
106 u_int32_t udps_filtermcast; /* blocked by multicast filter */
107 /* checksum statistics: */
108 u_int32_t udps_rcv_swcsum; /* udp swcksum (inbound), packets */
109 u_int32_t udps_rcv_swcsum_bytes; /* udp swcksum (inbound), bytes */
110 u_int32_t udps_rcv6_swcsum; /* udp6 swcksum (inbound), packets */
111 u_int32_t udps_rcv6_swcsum_bytes; /* udp6 swcksum (inbound), bytes */
112 u_int32_t udps_snd_swcsum; /* udp swcksum (outbound), packets */
113 u_int32_t udps_snd_swcsum_bytes; /* udp swcksum (outbound), bytes */
114 u_int32_t udps_snd6_swcsum; /* udp6 swcksum (outbound), packets */
115 u_int32_t udps_snd6_swcsum_bytes; /* udp6 swcksum (outbound), bytes */
116 /* Port unreachable duplicate suppression */
117 u_int64_t udps_port_unreach_dup_suppressed;
118 u_int64_t udps_port_unreach_not_suppressed;
119 };
120
121 /*
122 * Names for UDP sysctl objects
123 */
124 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
125 #define UDPCTL_STATS 2 /* statistics (read-only) */
126 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
127 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
128 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
129 #define UDPCTL_MAXID 6
130
131 #ifdef BSD_KERNEL_PRIVATE
132 #include <kern/locks.h>
133 #include <kern/mem_acct.h>
134 #include <sys/bitstring.h>
135
136 #define UDPCTL_NAMES { \
137 { 0, 0 }, \
138 { "checksum", CTLTYPE_INT }, \
139 { "stats", CTLTYPE_STRUCT }, \
140 { "maxdgram", CTLTYPE_INT }, \
141 { "recvspace", CTLTYPE_INT }, \
142 { "pcblist", CTLTYPE_STRUCT }, \
143 }
144
145 #define udp6stat udpstat
146 #define udp6s_opackets udps_opackets
147
148 SYSCTL_DECL(_net_inet_udp);
149
150 struct udpstat_local {
151 u_int64_t port_unreach;
152 u_int64_t faithprefix; /* deprecated */
153 u_int64_t port0;
154 u_int64_t badlength;
155 u_int64_t badchksum;
156 u_int64_t badmcast;
157 u_int64_t cleanup;
158 u_int64_t badipsec;
159 u_int64_t linkheur_stealthdrop;
160 };
161
162 extern struct pr_usrreqs udp_usrreqs;
163 extern struct inpcbhead udb;
164 extern struct inpcbinfo udbinfo;
165 extern u_int32_t udp_sendspace;
166 extern u_int32_t udp_recvspace;
167 extern struct udpstat udpstat;
168 extern int udp_log_in_vain;
169 extern struct mem_acct *udp_memacct;
170
171 static inline void
udp_memacct_add(int size)172 udp_memacct_add(int size)
173 {
174 mem_acct_add(udp_memacct, size);
175 }
176
177 static inline void
udp_memacct_sub(int size)178 udp_memacct_sub(int size)
179 {
180 mem_acct_sub(udp_memacct, size);
181 }
182
183
184 __BEGIN_DECLS
185 extern void udp_ctlinput(int, struct sockaddr *, void *, struct ifnet *);
186 extern int udp_ctloutput(struct socket *, struct sockopt *);
187 extern void udp_init(struct protosw *, struct domain *);
188 extern void udp_input(struct mbuf *, int);
189 extern int udp_connectx_common(struct socket *, int, struct sockaddr *,
190 struct sockaddr *, struct proc *, uint32_t, sae_associd_t,
191 sae_connid_t *, uint32_t, void *, uint32_t, struct uio*, user_ssize_t *);
192 extern void udp_notify(struct inpcb *inp, int errno);
193 extern int udp_shutdown(struct socket *so);
194 extern int udp_lock(struct socket *, int, void *);
195 extern int udp_unlock(struct socket *, int, void *);
196 extern lck_mtx_t *udp_getlock(struct socket *, int);
197 extern void udp_get_ports_used(ifnet_t ifp, int, u_int32_t, bitstr_t *__counted_by(bitstr_size(IP_PORTRANGE_SIZE)));
198 extern uint32_t udp_count_opportunistic(unsigned int, u_int32_t);
199 extern uint32_t udp_find_anypcb_byaddr(struct ifaddr *);
200
201 extern void udp_fill_keepalive_offload_frames(struct ifnet *,
202 struct ifnet_keepalive_offload_frame *__counted_by(frames_count) frames_array,
203 uint32_t frames_count, size_t, u_int32_t *);
204
205 __END_DECLS
206 #endif /* BSD_KERNEL_PRIVATE */
207 #endif /* _NETINET_UDP_VAR_H_ */
208