2 * Copyright (c) 1982, 1986, 1993
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33 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
36 #ifndef _NETINET_IP_VAR_H_
37 #define _NETINET_IP_VAR_H_
40 * Overlay for ip header used by other protocols (tcp, udp).
43 caddr_t ih_next
, ih_prev
; /* for protocol sequence q's */
44 u_char ih_x1
; /* (unused) */
45 u_char ih_pr
; /* protocol */
46 short ih_len
; /* protocol length */
47 struct in_addr ih_src
; /* source internet address */
48 struct in_addr ih_dst
; /* destination internet address */
52 * Ip reassembly queue structure. Each fragment
53 * being reassembled is attached to one of these structures.
54 * They are timed out after ipq_ttl drops to 0, and may also
55 * be reclaimed if memory becomes tight.
58 struct ipq
*next
,*prev
; /* to other reass headers */
59 u_char ipq_ttl
; /* time for reass q to live */
60 u_char ipq_p
; /* protocol of this fragment */
61 u_short ipq_id
; /* sequence id for reassembly */
62 struct ipasfrag
*ipq_next
,*ipq_prev
;
63 /* to ip headers of fragments */
64 struct in_addr ipq_src
,ipq_dst
;
68 * Ip header, when holding a fragment.
70 * Note: ipf_next must be at same offset as ipq_next above
73 #if BYTE_ORDER == LITTLE_ENDIAN
77 #if BYTE_ORDER == BIG_ENDIAN
81 u_char ipf_mff
; /* XXX overlays ip_tos: use low bit
82 * to avoid destroying tos;
83 * copied from (ip_off&IP_MF) */
90 struct ipasfrag
*ipf_next
; /* next fragment */
91 struct ipasfrag
*ipf_prev
; /* previous fragment */
95 * Structure stored in mbuf in inpcb.ip_options
96 * and passed to ip_output when ip options are in use.
97 * The actual length of the options (including ipopt_dst)
100 #define MAX_IPOPTLEN 40
103 struct in_addr ipopt_dst
; /* first-hop dst if source routed */
104 char ipopt_list
[MAX_IPOPTLEN
]; /* options proper */
108 * Structure attached to inpcb.ip_moptions and
109 * passed to ip_output when IP multicast options are in use.
112 struct ifnet
*imo_multicast_ifp
; /* ifp for outgoing multicasts */
113 u_char imo_multicast_ttl
; /* TTL for outgoing multicasts */
114 u_char imo_multicast_loop
; /* 1 => hear sends if a member */
115 u_short imo_num_memberships
; /* no. memberships this socket */
116 struct in_multi
*imo_membership
[IP_MAX_MEMBERSHIPS
];
117 u_long imo_multicast_vif
; /* vif num outgoing multicasts */
121 u_long ips_total
; /* total packets received */
122 u_long ips_badsum
; /* checksum bad */
123 u_long ips_tooshort
; /* packet too short */
124 u_long ips_toosmall
; /* not enough data */
125 u_long ips_badhlen
; /* ip header length < data size */
126 u_long ips_badlen
; /* ip length < ip header length */
127 u_long ips_fragments
; /* fragments received */
128 u_long ips_fragdropped
; /* frags dropped (dups, out of space) */
129 u_long ips_fragtimeout
; /* fragments timed out */
130 u_long ips_forward
; /* packets forwarded */
131 u_long ips_cantforward
; /* packets rcvd for unreachable dest */
132 u_long ips_redirectsent
; /* packets forwarded on same net */
133 u_long ips_noproto
; /* unknown or unsupported protocol */
134 u_long ips_delivered
; /* datagrams delivered to upper level*/
135 u_long ips_localout
; /* total ip packets generated here */
136 u_long ips_odropped
; /* lost packets due to nobufs, etc. */
137 u_long ips_reassembled
; /* total packets reassembled ok */
138 u_long ips_fragmented
; /* datagrams sucessfully fragmented */
139 u_long ips_ofragments
; /* output fragments created */
140 u_long ips_cantfrag
; /* don't fragment flag was set, etc. */
141 u_long ips_badoptions
; /* error in option processing */
142 u_long ips_noroute
; /* packets discarded due to no route */
143 u_long ips_badvers
; /* ip version != 4 */
144 u_long ips_rawout
; /* total raw ip packets generated */
148 /* flags passed to ip_output as last parameter */
149 #define IP_FORWARDING 0x1 /* most of ip header exists */
150 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
151 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
152 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
154 extern struct ipstat ipstat
;
155 extern struct ipq ipq
; /* ip reass. queue */
156 extern u_short ip_id
; /* ip packet ctr, for ids */
157 extern int ip_defttl
; /* default IP ttl */
158 extern u_char ip_protox
[];
159 extern struct socket
*ip_rsvpd
; /* reservation protocol daemon */
160 extern struct socket
*ip_mrouter
; /* multicast routing daemon */
161 extern int (*legal_vif_num
) __P((int));
162 extern u_long (*ip_mcast_src
) __P((int));
165 int ip_ctloutput
__P((int, struct socket
*, int, int, struct mbuf
**));
166 void ip_deq
__P((struct ipasfrag
*));
167 int ip_dooptions
__P((struct mbuf
*));
168 void ip_drain
__P((void));
169 void ip_enq
__P((struct ipasfrag
*, struct ipasfrag
*));
170 void ip_forward
__P((struct mbuf
*, int));
171 void ip_freef
__P((struct ipq
*));
172 void ip_freemoptions
__P((struct ip_moptions
*));
173 int ip_getmoptions
__P((int, struct ip_moptions
*, struct mbuf
**));
174 void ip_init
__P((void));
175 extern int (*ip_mforward
) __P((struct ip
*, struct ifnet
*, struct mbuf
*,
176 struct ip_moptions
*));
177 int ip_next_mtu
__P((int, int));
178 int ip_optcopy
__P((struct ip
*, struct ip
*));
179 int ip_output
__P((struct mbuf
*, struct mbuf
*, struct route
*, int,
180 struct ip_moptions
*));
181 int ip_pcbopts
__P((struct mbuf
**, struct mbuf
*));
183 ip_reass
__P((struct ipasfrag
*, struct ipq
*));
185 ip_rtaddr
__P((struct in_addr
));
186 int ip_setmoptions
__P((int, struct ip_moptions
**, struct mbuf
*));
187 void ip_slowtimo
__P((void));
189 ip_srcroute
__P((void));
190 void ip_stripoptions
__P((struct mbuf
*, struct mbuf
*));
191 int ip_sysctl
__P((int *, u_int
, void *, size_t *, void *, size_t));
192 void ipintr
__P((void));
193 int rip_ctloutput
__P((int, struct socket
*, int, int, struct mbuf
**));
194 void rip_init
__P((void));
195 void rip_input
__P((struct mbuf
*));
196 int rip_output
__P((struct mbuf
*, struct socket
*, u_long
));
197 int rip_usrreq
__P((struct socket
*,
198 int, struct mbuf
*, struct mbuf
*, struct mbuf
*));
199 int ip_rsvp_init
__P((struct socket
*));
200 int ip_rsvp_done
__P((void));
201 int ip_rsvp_vif_init
__P((struct socket
*, struct mbuf
*));
202 int ip_rsvp_vif_done
__P((struct socket
*, struct mbuf
*));
203 void ip_rsvp_force_done
__P((struct socket
*));
205 void rip_ip_input
__P((struct mbuf
*mm
,
206 register struct socket
*ip_mrouter
, struct sockaddr
*src
));