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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_
40 * UDP kernel structures and variables.
43 struct ipovly ui_i; /* overlaid ip structure */
44 struct udphdr ui_u; /* udp header */
46 #define ui_x1 ui_i.ih_x1
47 #define ui_v ui_i.ih_x1[0]
48 #define ui_pr ui_i.ih_pr
49 #define ui_len ui_i.ih_len
50 #define ui_src ui_i.ih_src
51 #define ui_dst ui_i.ih_dst
52 #define ui_sport ui_u.uh_sport
53 #define ui_dport ui_u.uh_dport
54 #define ui_ulen ui_u.uh_ulen
55 #define ui_sum ui_u.uh_sum
60 typedef void(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *,
61 const struct sockaddr *, void *);
62 typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *);
65 * UDP control block; one per udp.
68 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
69 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */
70 u_int u_flags; /* Generic UDP flags. */
71 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
72 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
73 void *u_tun_ctx; /* Tunneling callback context. */
76 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
77 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
79 /* IPsec: ESP in UDP tunneling: */
80 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
81 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
82 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
83 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
86 /* input statistics: */
87 uint64_t udps_ipackets; /* total input packets */
88 uint64_t udps_hdrops; /* packet shorter than header */
89 uint64_t udps_badsum; /* checksum error */
90 uint64_t udps_nosum; /* no checksum */
91 uint64_t udps_badlen; /* data length larger than packet */
92 uint64_t udps_noport; /* no socket on port */
93 uint64_t udps_noportbcast; /* of above, arrived as broadcast */
94 uint64_t udps_fullsock; /* not delivered, input socket full */
95 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
96 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
97 /* output statistics: */
98 uint64_t udps_opackets; /* total output packets */
99 uint64_t udps_fastout; /* output packets on fast path */
100 /* of no socket on port, arrived as multicast */
101 uint64_t udps_noportmcast;
102 uint64_t udps_filtermcast; /* blocked by multicast filter */
106 #include <sys/counter.h>
108 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
110 * In-kernel consumers can use these accessor macros directly to update
113 #define UDPSTAT_ADD(name, val) \
114 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
115 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
118 * Kernel module consumers must use this accessor macro.
120 void kmod_udpstat_inc(int statnum);
121 #define KMOD_UDPSTAT_INC(name) \
122 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
126 * Identifiers for UDP sysctl nodes.
128 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
129 #define UDPCTL_STATS 2 /* statistics (read-only) */
130 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
131 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
132 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
135 #include <netinet/in_pcb.h>
136 SYSCTL_DECL(_net_inet_udp);
138 extern struct pr_usrreqs udp_usrreqs;
139 VNET_DECLARE(struct inpcbhead, udb);
140 VNET_DECLARE(struct inpcbinfo, udbinfo);
141 VNET_DECLARE(struct inpcbhead, ulitecb);
142 VNET_DECLARE(struct inpcbinfo, ulitecbinfo);
143 #define V_udb VNET(udb)
144 #define V_udbinfo VNET(udbinfo)
145 #define V_ulitecb VNET(ulitecb)
146 #define V_ulitecbinfo VNET(ulitecbinfo)
148 extern u_long udp_sendspace;
149 extern u_long udp_recvspace;
150 VNET_DECLARE(int, udp_cksum);
151 VNET_DECLARE(int, udp_blackhole);
152 #define V_udp_cksum VNET(udp_cksum)
153 #define V_udp_blackhole VNET(udp_blackhole)
154 extern int udp_log_in_vain;
156 static __inline struct inpcbinfo *
157 udp_get_inpcbinfo(int protocol)
159 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
162 static __inline struct inpcbhead *
163 udp_get_pcblist(int protocol)
165 return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb;
168 int udp_newudpcb(struct inpcb *);
169 void udp_discardcb(struct udpcb *);
171 void udp_ctlinput(int, struct sockaddr *, void *);
172 void udplite_ctlinput(int, struct sockaddr *, void *);
173 int udp_ctloutput(struct socket *, struct sockopt *);
175 void udplite_init(void);
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);
181 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f,
182 udp_tun_icmp_t i, void *ctx);
186 #endif /* _NETINET_UDP_VAR_H_ */