1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)udp_var.h 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#ifndef _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_
/*
* UDP kernel structures and variables.
*/
struct udpiphdr {
struct ipovly ui_i; /* overlaid ip structure */
struct udphdr ui_u; /* udp header */
};
#define ui_x1 ui_i.ih_x1
#define ui_v ui_i.ih_x1[0]
#define ui_pr ui_i.ih_pr
#define ui_len ui_i.ih_len
#define ui_src ui_i.ih_src
#define ui_dst ui_i.ih_dst
#define ui_sport ui_u.uh_sport
#define ui_dport ui_u.uh_dport
#define ui_ulen ui_u.uh_ulen
#define ui_sum ui_u.uh_sum
struct inpcb;
struct mbuf;
typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *);
/*
* UDP control block; one per udp.
*/
struct udpcb {
udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
u_int u_flags; /* Generic UDP flags. */
uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
};
#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
#define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
/* IPsec: ESP in UDP tunneling: */
#define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
/* .. per draft-ietf-ipsec-nat-t-ike-0[01],
* and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
#define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
struct udpstat {
/* input statistics: */
uint64_t udps_ipackets; /* total input packets */
uint64_t udps_hdrops; /* packet shorter than header */
uint64_t udps_badsum; /* checksum error */
uint64_t udps_nosum; /* no checksum */
uint64_t udps_badlen; /* data length larger than packet */
uint64_t udps_noport; /* no socket on port */
uint64_t udps_noportbcast; /* of above, arrived as broadcast */
uint64_t udps_fullsock; /* not delivered, input socket full */
uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
/* output statistics: */
uint64_t udps_opackets; /* total output packets */
uint64_t udps_fastout; /* output packets on fast path */
/* of no socket on port, arrived as multicast */
uint64_t udps_noportmcast;
uint64_t udps_filtermcast; /* blocked by multicast filter */
};
#ifdef _KERNEL
#include <sys/counter.h>
VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
/*
* In-kernel consumers can use these accessor macros directly to update
* stats.
*/
#define UDPSTAT_ADD(name, val) \
VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
/*
* Kernel module consumers must use this accessor macro.
*/
void kmod_udpstat_inc(int statnum);
#define KMOD_UDPSTAT_INC(name) \
kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
#endif
/*
* Identifiers for UDP sysctl nodes.
*/
#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
#define UDPCTL_STATS 2 /* statistics (read-only) */
#define UDPCTL_MAXDGRAM 3 /* max datagram size */
#define UDPCTL_RECVSPACE 4 /* default receive buffer space */
#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_udp);
extern struct pr_usrreqs udp_usrreqs;
VNET_DECLARE(struct inpcbhead, udb);
VNET_DECLARE(struct inpcbinfo, udbinfo);
VNET_DECLARE(struct inpcbhead, ulitecb);
VNET_DECLARE(struct inpcbinfo, ulitecbinfo);
#define V_udb VNET(udb)
#define V_udbinfo VNET(udbinfo)
#define V_ulitecb VNET(ulitecb)
#define V_ulitecbinfo VNET(ulitecbinfo)
extern u_long udp_sendspace;
extern u_long udp_recvspace;
VNET_DECLARE(int, udp_cksum);
VNET_DECLARE(int, udp_blackhole);
#define V_udp_cksum VNET(udp_cksum)
#define V_udp_blackhole VNET(udp_blackhole)
extern int udp_log_in_vain;
static __inline struct inpcbinfo *
get_inpcbinfo(uint8_t protocol)
{
return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
}
static __inline struct inpcbhead *
get_pcblist(uint8_t protocol)
{
return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb;
}
int udp_newudpcb(struct inpcb *);
void udp_discardcb(struct udpcb *);
void udp_ctlinput(int, struct sockaddr *, void *);
void udplite_ctlinput(int, struct sockaddr *, void *);
int udp_ctloutput(struct socket *, struct sockopt *);
void udp_init(void);
void udplite_init(void);
#ifdef VIMAGE
void udp_destroy(void);
void udplite_destroy(void);
#endif
void udp_input(struct mbuf *, int);
void udplite_input(struct mbuf *, int);
struct inpcb *udp_notify(struct inpcb *inp, int errno);
int udp_shutdown(struct socket *so);
int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f);
#endif /* _KERNEL */
#endif /* _NETINET_UDP_VAR_H_ */
|
