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33 * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
34 * $FreeBSD: src/sys/netinet/ip_var.h,v 1.50.2.13 2003/08/24 08:24:38 hsu Exp $
35 * $DragonFly: src/sys/netinet/ip_var.h,v 1.16 2005/04/18 14:26:57 joerg Exp $
38 #ifndef _NETINET_IP_VAR_H_
39 #define _NETINET_IP_VAR_H_
41 #include <sys/queue.h>
44 * Overlay for ip header used by other protocols (tcp, udp).
47 u_char ih_x1
[9]; /* (unused) */
48 u_char ih_pr
; /* protocol */
49 u_short ih_len
; /* protocol length */
50 struct in_addr ih_src
; /* source internet address */
51 struct in_addr ih_dst
; /* destination internet address */
55 * Ip reassembly queue structure. Each fragment
56 * being reassembled is attached to one of these structures.
57 * They are timed out after ipq_ttl drops to 0, and may also
58 * be reclaimed if memory becomes tight.
61 struct ipq
*next
,*prev
; /* to other reass headers */
62 u_char ipq_ttl
; /* time for reass q to live */
63 u_char ipq_p
; /* protocol of this fragment */
64 u_short ipq_id
; /* sequence id for reassembly */
65 struct mbuf
*ipq_frags
; /* to ip headers of fragments */
66 struct in_addr ipq_src
,ipq_dst
;
67 u_char ipq_nfrags
; /* # frags in this packet */
69 u_int32_t ipq_div_info
; /* ipfw divert port & flags */
74 * Structure stored in mbuf in inpcb.ip_options
75 * and passed to ip_output when ip options are in use.
76 * The actual length of the options (including ipopt_dst)
79 #define MAX_IPOPTLEN 40
82 struct in_addr ipopt_dst
; /* first-hop dst if source routed */
83 char ipopt_list
[MAX_IPOPTLEN
]; /* options proper */
87 * Structure attached to inpcb.ip_moptions and
88 * passed to ip_output when IP multicast options are in use.
91 struct ifnet
*imo_multicast_ifp
; /* ifp for outgoing multicasts */
92 struct in_addr imo_multicast_addr
; /* ifindex/addr on MULTICAST_IF */
93 u_char imo_multicast_ttl
; /* TTL for outgoing multicasts */
94 u_char imo_multicast_loop
; /* 1 => hear sends if a member */
95 u_short imo_num_memberships
; /* no. memberships this socket */
96 struct in_multi
*imo_membership
[IP_MAX_MEMBERSHIPS
];
97 u_long imo_multicast_vif
; /* vif num outgoing multicasts */
103 #define ipstat ipstats_percpu[mycpuid]
105 #define ipstat ipstats_percpu[0]
109 extern struct ip_stats ipstats_percpu
[MAXCPU
];
116 u_long ips_total
; /* total packets received */
117 u_long ips_badsum
; /* checksum bad */
118 u_long ips_tooshort
; /* packet too short */
119 u_long ips_toosmall
; /* not enough data */
120 u_long ips_badhlen
; /* ip header length < data size */
121 u_long ips_badlen
; /* ip length < ip header length */
122 u_long ips_fragments
; /* fragments received */
123 u_long ips_fragdropped
; /* frags dropped (dups, out of space) */
124 u_long ips_fragtimeout
; /* fragments timed out */
125 u_long ips_forward
; /* packets forwarded */
126 u_long ips_fastforward
; /* packets fast forwarded */
127 u_long ips_cantforward
; /* packets rcvd for unreachable dest */
128 u_long ips_redirectsent
; /* packets forwarded on same net */
129 u_long ips_noproto
; /* unknown or unsupported protocol */
130 u_long ips_delivered
; /* datagrams delivered to upper level*/
131 u_long ips_localout
; /* total ip packets generated here */
132 u_long ips_odropped
; /* lost packets due to nobufs, etc. */
133 u_long ips_reassembled
; /* total packets reassembled ok */
134 u_long ips_fragmented
; /* datagrams successfully fragmented */
135 u_long ips_ofragments
; /* output fragments created */
136 u_long ips_cantfrag
; /* don't fragment flag was set, etc. */
137 u_long ips_badoptions
; /* error in option processing */
138 u_long ips_noroute
; /* packets discarded due to no route */
139 u_long ips_badvers
; /* ip version != 4 */
140 u_long ips_rawout
; /* total raw ip packets generated */
141 u_long ips_toolong
; /* ip length > max ip packet size */
142 u_long ips_notmember
; /* multicasts for unregistered grps */
143 u_long ips_nogif
; /* no match gif found */
144 u_long ips_badaddr
; /* invalid address on header */
149 /* flags passed to ip_output as last parameter */
150 #define IP_FORWARDING 0x1 /* most of ip header exists */
151 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
152 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
153 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
162 extern u_short ip_id
; /* ip packet ctr, for ids */
164 extern int ip_defttl
; /* default IP ttl */
165 extern int ipforwarding
; /* ip forwarding */
166 extern struct route ipforward_rt
; /* ip forwarding cached route */
167 extern u_char ip_protox
[];
168 extern struct socket
*ip_rsvpd
; /* reservation protocol daemon */
169 extern struct socket
*ip_mrouter
; /* multicast routing daemon */
170 extern int (*legal_vif_num
)(int);
171 extern u_long (*ip_mcast_src
)(int);
173 extern struct pr_usrreqs rip_usrreqs
;
175 int ip_ctloutput(struct socket
*, struct sockopt
*sopt
);
177 int ip_fragment(struct ip
*ip
, struct mbuf
**m_frag
, int mtu
,
178 u_long if_hwassist_flags
, int sw_csum
);
179 void ip_freemoptions(struct ip_moptions
*);
181 extern int (*ip_mforward
)(struct ip
*, struct ifnet
*, struct mbuf
*,
182 struct ip_moptions
*);
184 ip_mport(struct mbuf
**);
186 ip_lengthcheck(struct mbuf
**);
187 int ip_output(struct mbuf
*,
188 struct mbuf
*, struct route
*, int, struct ip_moptions
*,
191 ip_rtaddr(struct in_addr
, struct route
*);
192 void ip_savecontrol(struct inpcb
*, struct mbuf
**, struct ip
*,
194 void ip_slowtimo(void);
197 void ip_stripoptions(struct mbuf
*);
202 int rip_ctloutput(struct socket
*, struct sockopt
*);
203 void rip_ctlinput(int, struct sockaddr
*, void *);
205 void rip_input(struct mbuf
*, ...);
206 int rip_output(struct mbuf
*, struct socket
*, ...);
207 extern void (*ipip_input
)(struct mbuf
*, int, int);
208 void rsvp_input(struct mbuf
*, ...);
209 int ip_rsvp_init(struct socket
*);
210 int ip_rsvp_done(void);
211 extern int (*ip_rsvp_vif
)(struct socket
*, struct sockopt
*);
212 extern void (*ip_rsvp_force_done
)(struct socket
*);
213 extern void (*rsvp_input_p
)(struct mbuf
*m
, ...);
217 void div_input(struct mbuf
*, ...);
218 void divert_packet(struct mbuf
*m
, int incoming
, int port
);
219 extern struct pr_usrreqs div_usrreqs
;
222 extern struct pfil_head inet_pfil_hook
;
224 void in_delayed_cksum(struct mbuf
*m
);
228 #endif /* !_NETINET_IP_VAR_H_ */