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32 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
36 #ifndef _NETINET_UDP_VAR_H_
37 #define _NETINET_UDP_VAR_H_
39 #include <sys/types.h>
40 #include <netinet/ip_var.h>
41 #include <netinet/udp.h>
44 * UDP kernel structures and variables.
47 struct ipovly ui_i; /* overlaid ip structure */
48 struct udphdr ui_u; /* udp header */
50 #define ui_x1 ui_i.ih_x1
51 #define ui_v ui_i.ih_x1[0]
52 #define ui_pr ui_i.ih_pr
53 #define ui_len ui_i.ih_len
54 #define ui_src ui_i.ih_src
55 #define ui_dst ui_i.ih_dst
56 #define ui_sport ui_u.uh_sport
57 #define ui_dport ui_u.uh_dport
58 #define ui_ulen ui_u.uh_ulen
59 #define ui_sum ui_u.uh_sum
65 typedef bool(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *,
66 const struct sockaddr *, void *);
67 typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *);
70 * UDP control block; one per udp.
73 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
74 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */
75 u_int u_flags; /* Generic UDP flags. */
76 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
77 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
78 void *u_tun_ctx; /* Tunneling callback context. */
81 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
82 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
85 /* IPsec: ESP in UDP tunneling: */
86 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
87 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
88 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
89 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
92 /* input statistics: */
93 uint64_t udps_ipackets; /* total input packets */
94 uint64_t udps_hdrops; /* packet shorter than header */
95 uint64_t udps_badsum; /* checksum error */
96 uint64_t udps_nosum; /* no checksum */
97 uint64_t udps_badlen; /* data length larger than packet */
98 uint64_t udps_noport; /* no socket on port */
99 uint64_t udps_noportbcast; /* of above, arrived as broadcast */
100 uint64_t udps_fullsock; /* not delivered, input socket full */
101 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
102 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
103 /* output statistics: */
104 uint64_t udps_opackets; /* total output packets */
105 uint64_t udps_fastout; /* output packets on fast path */
106 /* of no socket on port, arrived as multicast */
107 uint64_t udps_noportmcast;
108 uint64_t udps_filtermcast; /* blocked by multicast filter */
112 #include <sys/counter.h>
114 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
116 * In-kernel consumers can use these accessor macros directly to update
119 #define UDPSTAT_ADD(name, val) \
120 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
121 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
124 * Kernel module consumers must use this accessor macro.
126 void kmod_udpstat_inc(int statnum);
127 #define KMOD_UDPSTAT_INC(name) \
128 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
132 * Identifiers for UDP sysctl nodes.
134 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
135 #define UDPCTL_STATS 2 /* statistics (read-only) */
136 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
137 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
138 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
141 #include <netinet/in_pcb.h>
142 SYSCTL_DECL(_net_inet_udp);
144 extern struct pr_usrreqs udp_usrreqs;
145 VNET_DECLARE(struct inpcbinfo, udbinfo);
146 VNET_DECLARE(struct inpcbinfo, ulitecbinfo);
147 #define V_udbinfo VNET(udbinfo)
148 #define V_ulitecbinfo VNET(ulitecbinfo)
150 extern u_long udp_sendspace;
151 extern u_long udp_recvspace;
152 VNET_DECLARE(int, udp_cksum);
153 VNET_DECLARE(int, udp_blackhole);
154 VNET_DECLARE(bool, udp_blackhole_local);
155 VNET_DECLARE(int, udp_log_in_vain);
156 #define V_udp_cksum VNET(udp_cksum)
157 #define V_udp_blackhole VNET(udp_blackhole)
158 #define V_udp_blackhole_local VNET(udp_blackhole_local)
159 #define V_udp_log_in_vain VNET(udp_log_in_vain)
161 VNET_DECLARE(int, zero_checksum_port);
162 #define V_zero_checksum_port VNET(zero_checksum_port)
164 static __inline struct inpcbinfo *
165 udp_get_inpcbinfo(int protocol)
167 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
170 int udp_newudpcb(struct inpcb *);
171 void udp_discardcb(struct udpcb *);
173 int udp_ctloutput(struct socket *, struct sockopt *);
174 void udplite_input(struct mbuf *, int);
175 struct inpcb *udp_notify(struct inpcb *inp, int errno);
176 int udp_shutdown(struct socket *so);
178 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f,
179 udp_tun_icmp_t i, void *ctx);
183 #endif /* _NETINET_UDP_VAR_H_ */