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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_pr ui_i.ih_pr
46 #define ui_len ui_i.ih_len
47 #define ui_src ui_i.ih_src
48 #define ui_dst ui_i.ih_dst
49 #define ui_sport ui_u.uh_sport
50 #define ui_dport ui_u.uh_dport
51 #define ui_ulen ui_u.uh_ulen
52 #define ui_sum ui_u.uh_sum
54 typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *);
57 * UDP control block; one per udp.
60 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
61 u_int u_flags; /* Generic UDP flags. */
64 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
65 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
67 /* IPsec: ESP in UDP tunneling: */
68 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
69 /* .. per draft-ietf-ipsec-nat-t-ike-0[01],
70 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
71 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
74 /* input statistics: */
75 u_long udps_ipackets; /* total input packets */
76 u_long udps_hdrops; /* packet shorter than header */
77 u_long udps_badsum; /* checksum error */
78 u_long udps_nosum; /* no checksum */
79 u_long udps_badlen; /* data length larger than packet */
80 u_long udps_noport; /* no socket on port */
81 u_long udps_noportbcast; /* of above, arrived as broadcast */
82 u_long udps_fullsock; /* not delivered, input socket full */
83 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
84 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
85 /* output statistics: */
86 u_long udps_opackets; /* total output packets */
87 u_long udps_fastout; /* output packets on fast path */
88 /* of no socket on port, arrived as multicast */
89 u_long udps_noportmcast;
90 u_long udps_filtermcast; /* blocked by multicast filter */
95 * In-kernel consumers can use these accessor macros directly to update
98 #define UDPSTAT_ADD(name, val) V_udpstat.name += (val)
99 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
102 * Kernel module consumers must use this accessor macro.
104 void kmod_udpstat_inc(int statnum);
105 #define KMOD_UDPSTAT_INC(name) \
106 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(u_long))
110 * Names for UDP sysctl objects.
112 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
113 #define UDPCTL_STATS 2 /* statistics (read-only) */
114 #define UDPCTL_MAXDGRAM 3 /* max datagram size */
115 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */
116 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
117 #define UDPCTL_MAXID 6
119 #define UDPCTL_NAMES { \
121 { "checksum", CTLTYPE_INT }, \
122 { "stats", CTLTYPE_STRUCT }, \
123 { "maxdgram", CTLTYPE_INT }, \
124 { "recvspace", CTLTYPE_INT }, \
125 { "pcblist", CTLTYPE_STRUCT }, \
129 SYSCTL_DECL(_net_inet_udp);
131 extern struct pr_usrreqs udp_usrreqs;
132 VNET_DECLARE(struct inpcbhead, udb);
133 VNET_DECLARE(struct inpcbinfo, udbinfo);
134 #define V_udb VNET(udb)
135 #define V_udbinfo VNET(udbinfo)
137 extern u_long udp_sendspace;
138 extern u_long udp_recvspace;
139 VNET_DECLARE(int, udp_cksum);
140 VNET_DECLARE(struct udpstat, udpstat);
141 VNET_DECLARE(int, udp_blackhole);
142 #define V_udp_cksum VNET(udp_cksum)
143 #define V_udpstat VNET(udpstat)
144 #define V_udp_blackhole VNET(udp_blackhole)
145 extern int udp_log_in_vain;
147 int udp_newudpcb(struct inpcb *);
148 void udp_discardcb(struct udpcb *);
150 void udp_ctlinput(int, struct sockaddr *, void *);
151 int udp_ctloutput(struct socket *, struct sockopt *);
154 void udp_destroy(void);
156 void udp_input(struct mbuf *, int);
157 struct inpcb *udp_notify(struct inpcb *inp, int errno);
158 int udp_shutdown(struct socket *so);
160 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f);