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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 <netinet/ip_var.h>
40 #include <netinet/udp.h>
43 * UDP kernel structures and variables.
46 struct ipovly ui_i; /* overlaid ip structure */
47 struct udphdr ui_u; /* udp header */
49 #define ui_x1 ui_i.ih_x1
50 #define ui_v ui_i.ih_x1[0]
51 #define ui_pr ui_i.ih_pr
52 #define ui_len ui_i.ih_len
53 #define ui_src ui_i.ih_src
54 #define ui_dst ui_i.ih_dst
55 #define ui_sport ui_u.uh_sport
56 #define ui_dport ui_u.uh_dport
57 #define ui_ulen ui_u.uh_ulen
58 #define ui_sum ui_u.uh_sum
63 typedef void(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *,
64 const struct sockaddr *, void *);
65 typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *);
68 * UDP control block; one per udp.
71 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
72 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */
73 u_int u_flags; /* Generic UDP flags. */
74 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
75 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
76 void *u_tun_ctx; /* Tunneling callback context. */
79 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
80 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
82 /* IPsec: ESP in UDP tunneling: */
83 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
84 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
85 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
86 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
89 /* input statistics: */
90 uint64_t udps_ipackets; /* total input packets */
91 uint64_t udps_hdrops; /* packet shorter than header */
92 uint64_t udps_badsum; /* checksum error */
93 uint64_t udps_nosum; /* no checksum */
94 uint64_t udps_badlen; /* data length larger than packet */
95 uint64_t udps_noport; /* no socket on port */
96 uint64_t udps_noportbcast; /* of above, arrived as broadcast */
97 uint64_t udps_fullsock; /* not delivered, input socket full */
98 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
99 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
100 /* output statistics: */
101 uint64_t udps_opackets; /* total output packets */
102 uint64_t udps_fastout; /* output packets on fast path */
103 /* of no socket on port, arrived as multicast */
104 uint64_t udps_noportmcast;
105 uint64_t udps_filtermcast; /* blocked by multicast filter */
109 #include <sys/counter.h>
111 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
113 * In-kernel consumers can use these accessor macros directly to update
116 #define UDPSTAT_ADD(name, val) \
117 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
118 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
121 * Kernel module consumers must use this accessor macro.
123 void kmod_udpstat_inc(int statnum);
124 #define KMOD_UDPSTAT_INC(name) \
125 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
129 * Identifiers for UDP sysctl nodes.
131 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
132 #define UDPCTL_STATS 2 /* statistics (read-only) */
133 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
134 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
135 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
138 #include <netinet/in_pcb.h>
139 SYSCTL_DECL(_net_inet_udp);
141 extern struct pr_usrreqs udp_usrreqs;
142 VNET_DECLARE(struct inpcbinfo, udbinfo);
143 VNET_DECLARE(struct inpcbinfo, ulitecbinfo);
144 #define V_udbinfo VNET(udbinfo)
145 #define V_ulitecbinfo VNET(ulitecbinfo)
147 extern u_long udp_sendspace;
148 extern u_long udp_recvspace;
149 VNET_DECLARE(int, udp_cksum);
150 VNET_DECLARE(int, udp_blackhole);
151 VNET_DECLARE(bool, udp_blackhole_local);
152 VNET_DECLARE(int, udp_log_in_vain);
153 #define V_udp_cksum VNET(udp_cksum)
154 #define V_udp_blackhole VNET(udp_blackhole)
155 #define V_udp_blackhole_local VNET(udp_blackhole_local)
156 #define V_udp_log_in_vain VNET(udp_log_in_vain)
158 VNET_DECLARE(int, zero_checksum_port);
159 #define V_zero_checksum_port VNET(zero_checksum_port)
161 static __inline struct inpcbinfo *
162 udp_get_inpcbinfo(int protocol)
164 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
167 int udp_newudpcb(struct inpcb *);
168 void udp_discardcb(struct udpcb *);
170 void udp_ctlinput(int, struct sockaddr *, void *);
171 void udplite_ctlinput(int, struct sockaddr *, void *);
172 int udp_ctloutput(struct socket *, struct sockopt *);
173 int udp_input(struct mbuf **, int *, int);
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_ */