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30 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
34 #ifndef _NETINET_UDP_VAR_H_
35 #define _NETINET_UDP_VAR_H_
38 * UDP kernel structures and variables.
41 struct ipovly ui_i; /* overlaid ip structure */
42 struct udphdr ui_u; /* udp header */
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
58 typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *);
61 * UDP control block; one per udp.
64 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
65 u_int u_flags; /* Generic UDP flags. */
66 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
67 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
70 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
71 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
73 /* IPsec: ESP in UDP tunneling: */
74 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
75 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
76 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
77 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
80 /* input statistics: */
81 uint64_t udps_ipackets; /* total input packets */
82 uint64_t udps_hdrops; /* packet shorter than header */
83 uint64_t udps_badsum; /* checksum error */
84 uint64_t udps_nosum; /* no checksum */
85 uint64_t udps_badlen; /* data length larger than packet */
86 uint64_t udps_noport; /* no socket on port */
87 uint64_t udps_noportbcast; /* of above, arrived as broadcast */
88 uint64_t udps_fullsock; /* not delivered, input socket full */
89 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
90 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
91 /* output statistics: */
92 uint64_t udps_opackets; /* total output packets */
93 uint64_t udps_fastout; /* output packets on fast path */
94 /* of no socket on port, arrived as multicast */
95 uint64_t udps_noportmcast;
96 uint64_t udps_filtermcast; /* blocked by multicast filter */
100 #include <sys/counter.h>
102 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
104 * In-kernel consumers can use these accessor macros directly to update
107 #define UDPSTAT_ADD(name, val) \
108 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
109 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
112 * Kernel module consumers must use this accessor macro.
114 void kmod_udpstat_inc(int statnum);
115 #define KMOD_UDPSTAT_INC(name) \
116 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
120 * Names for UDP sysctl objects.
122 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
123 #define UDPCTL_STATS 2 /* statistics (read-only) */
124 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
125 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
126 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
127 #define UDPCTL_MAXID 6
130 SYSCTL_DECL(_net_inet_udp);
132 extern struct pr_usrreqs udp_usrreqs;
133 VNET_DECLARE(struct inpcbhead, udb);
134 VNET_DECLARE(struct inpcbinfo, udbinfo);
135 VNET_DECLARE(struct inpcbhead, ulitecb);
136 VNET_DECLARE(struct inpcbinfo, ulitecbinfo);
137 #define V_udb VNET(udb)
138 #define V_udbinfo VNET(udbinfo)
139 #define V_ulitecb VNET(ulitecb)
140 #define V_ulitecbinfo VNET(ulitecbinfo)
142 extern u_long udp_sendspace;
143 extern u_long udp_recvspace;
144 VNET_DECLARE(int, udp_cksum);
145 VNET_DECLARE(int, udp_blackhole);
146 #define V_udp_cksum VNET(udp_cksum)
147 #define V_udp_blackhole VNET(udp_blackhole)
148 extern int udp_log_in_vain;
150 static __inline struct inpcbinfo *
151 get_inpcbinfo(uint8_t protocol)
153 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
156 static __inline struct inpcbhead *
157 get_pcblist(uint8_t protocol)
159 return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb;
162 int udp_newudpcb(struct inpcb *);
163 void udp_discardcb(struct udpcb *);
165 void udp_ctlinput(int, struct sockaddr *, void *);
166 void udplite_ctlinput(int, struct sockaddr *, void *);
167 int udp_ctloutput(struct socket *, struct sockopt *);
169 void udplite_init(void);
171 void udp_destroy(void);
172 void udplite_destroy(void);
174 void udp_input(struct mbuf *, int);
175 void udplite_input(struct mbuf *, int);
176 struct inpcb *udp_notify(struct inpcb *inp, int errno);
177 int udp_shutdown(struct socket *so);
179 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f);
183 #endif /* _NETINET_UDP_VAR_H_ */