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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 $
37 #ifndef _NETINET_IP_VAR_H_
38 #define _NETINET_IP_VAR_H_
41 #include <sys/types.h>
44 #include <sys/queue.h>
46 #ifndef _NETINET_IN_H_
47 #include <netinet/in.h>
52 #include <machine/endian.h>
53 #ifndef _MACHINE_PARAM_H_
54 #include <machine/param.h>
57 #include <net/route.h>
63 * Overlay for ip header used by other protocols (tcp, udp).
66 u_char ih_x1
[9]; /* (unused) */
67 u_char ih_pr
; /* protocol */
68 u_short ih_len
; /* protocol length */
69 struct in_addr ih_src
; /* source internet address */
70 struct in_addr ih_dst
; /* destination internet address */
74 * Ip reassembly queue structure. Each fragment
75 * being reassembled is attached to one of these structures.
76 * They are timed out after ipq_ttl drops to 0, and may also
77 * be reclaimed if memory becomes tight.
80 TAILQ_ENTRY(ipq
) ipq_list
; /* to other reass headers */
81 u_char ipq_ttl
; /* time for reass q to live */
82 u_char ipq_p
; /* protocol of this fragment */
83 u_short ipq_id
; /* sequence id for reassembly */
84 struct mbuf
*ipq_frags
; /* to ip headers of fragments */
85 struct in_addr ipq_src
,ipq_dst
;
86 u_char ipq_nfrags
; /* # frags in this packet */
90 * Structure stored in mbuf in inpcb.ip_options
91 * and passed to ip_output when ip options are in use.
92 * The actual length of the options (including ipopt_dst)
95 #define MAX_IPOPTLEN 40
98 struct in_addr ipopt_dst
; /* first-hop dst if source routed */
99 char ipopt_list
[MAX_IPOPTLEN
]; /* options proper */
103 * Structure attached to inpcb.ip_moptions and
104 * passed to ip_output when IP multicast options are in use.
107 struct ifnet
*imo_multicast_ifp
; /* ifp for outgoing multicasts */
108 struct in_addr imo_multicast_addr
; /* ifindex/addr on MULTICAST_IF */
109 u_char imo_multicast_ttl
; /* TTL for outgoing multicasts */
110 u_char imo_multicast_loop
; /* 1 => hear sends if a member */
111 u_short imo_num_memberships
; /* no. memberships this socket */
112 u_short imo_max_memberships
; /* max memberships this socket */
113 struct in_multi
*imo_membership
[IP_MAX_MEMBERSHIPS
];
114 u_long imo_multicast_vif
; /* vif num outgoing multicasts */
120 * NOTE: Make sure this struct's size is multiple cache line size.
123 u_long ips_total
; /* total packets received */
124 u_long ips_badsum
; /* checksum bad */
125 u_long ips_tooshort
; /* packet too short */
126 u_long ips_toosmall
; /* not enough data */
127 u_long ips_badhlen
; /* ip header length < data size */
128 u_long ips_badlen
; /* ip length < ip header length */
129 u_long ips_fragments
; /* fragments received */
130 u_long ips_fragdropped
; /* frags dropped (dups, out of space) */
131 u_long ips_fragtimeout
; /* fragments timed out */
132 u_long ips_forward
; /* packets forwarded */
133 u_long ips_fastforward
; /* packets fast forwarded */
134 u_long ips_cantforward
; /* packets rcvd for unreachable dest */
135 u_long ips_redirectsent
; /* packets forwarded on same net */
136 u_long ips_noproto
; /* unknown or unsupported protocol */
137 u_long ips_delivered
; /* datagrams delivered to upper level*/
138 u_long ips_localout
; /* total ip packets generated here */
139 u_long ips_odropped
; /* lost packets due to nobufs, etc. */
140 u_long ips_reassembled
; /* total packets reassembled ok */
141 u_long ips_fragmented
; /* datagrams successfully fragmented */
142 u_long ips_ofragments
; /* output fragments created */
143 u_long ips_cantfrag
; /* don't fragment flag was set, etc. */
144 u_long ips_badoptions
; /* error in option processing */
145 u_long ips_noroute
; /* packets discarded due to no route */
146 u_long ips_badvers
; /* ip version != 4 */
147 u_long ips_rawout
; /* total raw ip packets generated */
148 u_long ips_toolong
; /* ip length > max ip packet size */
149 u_long ips_notmember
; /* multicasts for unregistered grps */
150 u_long ips_nogif
; /* no match gif found */
151 u_long ips_badaddr
; /* invalid address on header */
152 u_long ips_pad
[3]; /* pad to cache line size (64B) */
157 #define ipstat ipstats_percpu[mycpuid]
159 extern struct ip_stats ipstats_percpu
[MAXCPU
];
161 /* flags passed to ip_output as last parameter */
162 #define IP_FORWARDING 0x1 /* most of ip header exists */
163 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
164 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
165 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
166 #define IP_DEBUGROUTE 0x10000 /* debug route */
176 extern u_short ip_id
; /* ip packet ctr, for ids */
177 extern int ip_defttl
; /* default IP ttl */
178 extern int ipforwarding
; /* ip forwarding */
179 extern u_char ip_protox
[];
180 extern struct socket
*ip_rsvpd
; /* reservation protocol daemon */
181 extern struct socket
*ip_mrouter
; /* multicast routing daemon */
182 extern int (*legal_vif_num
)(int);
183 extern u_long (*ip_mcast_src
)(int);
185 extern struct pr_usrreqs rip_usrreqs
;
187 void ip_ctloutput(union netmsg
*);
189 int ip_fragment(struct ip
*ip
, struct mbuf
**m_frag
, int mtu
,
190 u_long if_hwassist_flags
, int sw_csum
);
192 ip_reass(struct mbuf
*);
193 void ip_freemoptions(struct ip_moptions
*);
195 extern int (*ip_mforward
)(struct ip
*, struct ifnet
*, struct mbuf
*,
196 struct ip_moptions
*);
198 void ip_hashfn(struct mbuf
**, int);
199 void ip_hashcheck(struct mbuf
*, const struct pktinfo
*);
202 ip_lengthcheck(struct mbuf
**, int);
203 int ip_output(struct mbuf
*,
204 struct mbuf
*, struct route
*, int, struct ip_moptions
*,
207 ip_rtaddr(struct in_addr
, struct route
*);
208 void ip_savecontrol(struct inpcb
*, struct mbuf
**, struct ip
*,
210 void ip_slowtimo(void);
212 ip_srcroute(struct mbuf
*);
213 void ip_stripoptions(struct mbuf
*);
214 u_int16_t
ip_randomid(void);
215 void rip_ctloutput(union netmsg
*);
216 void rip_ctlinput(union netmsg
*);
218 int rip_input(struct mbuf
**, int *, int);
219 int rip_output(struct mbuf
*, struct socket
*, ...);
220 extern int (*ipip_input
)(struct mbuf
**, int *, int);
221 int rsvp_input(struct mbuf
**, int *, int);
222 int ip_rsvp_init(struct socket
*);
223 int ip_rsvp_done(void);
224 extern int (*ip_rsvp_vif
)(struct socket
*, struct sockopt
*);
225 extern void (*ip_rsvp_force_done
)(struct socket
*);
226 extern int (*rsvp_input_p
)(struct mbuf
**, int *, int);
228 extern struct pfil_head inet_pfil_hook
;
230 void in_delayed_cksum(struct mbuf
*m
);
232 static __inline
uint16_t ip_newid(void);
233 extern int ip_do_randomid
;
235 static __inline
uint16_t
239 return ip_randomid();
241 return __htons(ip_id
++);
246 #endif /* !_NETINET_IP_VAR_H_ */