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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. */
68 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
69 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
71 /* IPsec: ESP in UDP tunneling: */
72 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
73 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
74 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
75 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
78 /* input statistics: */
79 uint64_t udps_ipackets; /* total input packets */
80 uint64_t udps_hdrops; /* packet shorter than header */
81 uint64_t udps_badsum; /* checksum error */
82 uint64_t udps_nosum; /* no checksum */
83 uint64_t udps_badlen; /* data length larger than packet */
84 uint64_t udps_noport; /* no socket on port */
85 uint64_t udps_noportbcast; /* of above, arrived as broadcast */
86 uint64_t udps_fullsock; /* not delivered, input socket full */
87 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */
88 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */
89 /* output statistics: */
90 uint64_t udps_opackets; /* total output packets */
91 uint64_t udps_fastout; /* output packets on fast path */
92 /* of no socket on port, arrived as multicast */
93 uint64_t udps_noportmcast;
94 uint64_t udps_filtermcast; /* blocked by multicast filter */
98 #include <sys/counter.h>
100 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
102 * In-kernel consumers can use these accessor macros directly to update
105 #define UDPSTAT_ADD(name, val) \
106 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val))
107 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
110 * Kernel module consumers must use this accessor macro.
112 void kmod_udpstat_inc(int statnum);
113 #define KMOD_UDPSTAT_INC(name) \
114 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t))
118 * Names for UDP sysctl objects.
120 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
121 #define UDPCTL_STATS 2 /* statistics (read-only) */
122 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
123 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
124 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
125 #define UDPCTL_MAXID 6
128 SYSCTL_DECL(_net_inet_udp);
130 extern struct pr_usrreqs udp_usrreqs;
131 VNET_DECLARE(struct inpcbhead, udb);
132 VNET_DECLARE(struct inpcbinfo, udbinfo);
133 #define V_udb VNET(udb)
134 #define V_udbinfo VNET(udbinfo)
136 extern u_long udp_sendspace;
137 extern u_long udp_recvspace;
138 VNET_DECLARE(int, udp_cksum);
139 VNET_DECLARE(int, udp_blackhole);
140 #define V_udp_cksum VNET(udp_cksum)
141 #define V_udp_blackhole VNET(udp_blackhole)
142 extern int udp_log_in_vain;
144 int udp_newudpcb(struct inpcb *);
145 void udp_discardcb(struct udpcb *);
147 void udp_ctlinput(int, struct sockaddr *, void *);
148 int udp_ctloutput(struct socket *, struct sockopt *);
151 void udp_destroy(void);
153 void udp_input(struct mbuf *, int);
154 struct inpcb *udp_notify(struct inpcb *inp, int errno);
155 int udp_shutdown(struct socket *so);
157 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f);