1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
31 * $FreeBSD$
32 */
33
34 #ifndef _NETINET_UDP_VAR_H_
35 #define _NETINET_UDP_VAR_H_
36
37 /*
38 * UDP kernel structures and variables.
39 */
40 struct udpiphdr {
41 struct ipovly ui_i; /* overlaid ip structure */
42 struct udphdr ui_u; /* udp header */
43 };
44 #define ui_x1 ui_i.ih_x1
45 #define ui_v ui_i.ih_x1[0]
46 #define ui_pr ui_i.ih_pr
47 #define ui_len ui_i.ih_len
48 #define ui_src ui_i.ih_src
49 #define ui_dst ui_i.ih_dst
50 #define ui_sport ui_u.uh_sport
51 #define ui_dport ui_u.uh_dport
52 #define ui_ulen ui_u.uh_ulen
53 #define ui_sum ui_u.uh_sum
54
55 struct inpcb;
56 struct mbuf;
57
58 typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *,
59 const struct sockaddr *, void *);
60
61 /*
62 * UDP control block; one per udp.
63 */
64 struct udpcb {
65 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
66 u_int u_flags; /* Generic UDP flags. */
67 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
68 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
69 void *u_tun_ctx; /* Tunneling callback context. */
70 };
71
72 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
73 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
74
75 /* IPsec: ESP in UDP tunneling: */
76 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
77 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
78 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
79 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
80
81 struct udpstat {
82 /* input statistics: */
83 uint64_t udps_ipackets; /* total input packets */
84 uint64_t udps_hdrops; /* packet shorter than header */
85 uint64_t udps_badsum; /* checksum error */
86 uint64_t udps_nosum; /* no checksum */
87 uint64_t udps_badlen; /* data length larger than packet */
88 uint64_t udps_noport; /* no socket on port */
89 uint64_t udps_noportbcast; /* of above, arrived as broadcast */
90 uint64_t udps_fullsock; /* not delivered, input socket full */
91 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
92 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
93 /* output statistics: */
94 uint64_t udps_opackets; /* total output packets */
95 uint64_t udps_fastout; /* output packets on fast path */
96 /* of no socket on port, arrived as multicast */
97 uint64_t udps_noportmcast;
98 uint64_t udps_filtermcast; /* blocked by multicast filter */
99 };
100
101 #ifdef _KERNEL
102 #include <sys/counter.h>
103
104 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
105 /*
106 * In-kernel consumers can use these accessor macros directly to update
107 * stats.
108 */
109 #define UDPSTAT_ADD(name, val) \
110 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
111 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
112
113 /*
114 * Kernel module consumers must use this accessor macro.
115 */
116 void kmod_udpstat_inc(int statnum);
117 #define KMOD_UDPSTAT_INC(name) \
118 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
119 #endif
120
121 /*
122 * Identifiers for UDP sysctl nodes.
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
130 #ifdef _KERNEL
131 #include <netinet/in_pcb.h>
132 SYSCTL_DECL(_net_inet_udp);
133
134 extern struct pr_usrreqs udp_usrreqs;
135 VNET_DECLARE(struct inpcbhead, udb);
136 VNET_DECLARE(struct inpcbinfo, udbinfo);
137 VNET_DECLARE(struct inpcbhead, ulitecb);
138 VNET_DECLARE(struct inpcbinfo, ulitecbinfo);
139 #define V_udb VNET(udb)
140 #define V_udbinfo VNET(udbinfo)
141 #define V_ulitecb VNET(ulitecb)
142 #define V_ulitecbinfo VNET(ulitecbinfo)
143
144 extern u_long udp_sendspace;
145 extern u_long udp_recvspace;
146 VNET_DECLARE(int, udp_cksum);
147 VNET_DECLARE(int, udp_blackhole);
148 #define V_udp_cksum VNET(udp_cksum)
149 #define V_udp_blackhole VNET(udp_blackhole)
150 extern int udp_log_in_vain;
151
152 static __inline struct inpcbinfo *
udp_get_inpcbinfo(int protocol)153 udp_get_inpcbinfo(int protocol)
154 {
155 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
156 }
157
158 static __inline struct inpcbhead *
udp_get_pcblist(int protocol)159 udp_get_pcblist(int protocol)
160 {
161 return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb;
162 }
163
164 int udp_newudpcb(struct inpcb *);
165 void udp_discardcb(struct udpcb *);
166
167 void udp_ctlinput(int, struct sockaddr *, void *);
168 void udplite_ctlinput(int, struct sockaddr *, void *);
169 int udp_ctloutput(struct socket *, struct sockopt *);
170 void udp_init(void);
171 void udplite_init(void);
172 #ifdef VIMAGE
173 void udp_destroy(void);
174 void udplite_destroy(void);
175 #endif
176 int udp_input(struct mbuf **, int *, int);
177 void udplite_input(struct mbuf *, int);
178 struct inpcb *udp_notify(struct inpcb *inp, int errno);
179 int udp_shutdown(struct socket *so);
180
181 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f,
182 void *ctx);
183
184 #endif /* _KERNEL */
185
186 #endif /* _NETINET_UDP_VAR_H_ */
187