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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 */
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_fastforward
; /* packets fast forwarded */
132 u_long ips_cantforward
; /* packets rcvd for unreachable dest */
133 u_long ips_redirectsent
; /* packets forwarded on same net */
134 u_long ips_noproto
; /* unknown or unsupported protocol */
135 u_long ips_delivered
; /* datagrams delivered to upper level*/
136 u_long ips_localout
; /* total ip packets generated here */
137 u_long ips_odropped
; /* lost packets due to nobufs, etc. */
138 u_long ips_reassembled
; /* total packets reassembled ok */
139 u_long ips_fragmented
; /* datagrams successfully fragmented */
140 u_long ips_ofragments
; /* output fragments created */
141 u_long ips_cantfrag
; /* don't fragment flag was set, etc. */
142 u_long ips_badoptions
; /* error in option processing */
143 u_long ips_noroute
; /* packets discarded due to no route */
144 u_long ips_badvers
; /* ip version != 4 */
145 u_long ips_rawout
; /* total raw ip packets generated */
146 u_long ips_toolong
; /* ip length > max ip packet size */
147 u_long ips_notmember
; /* multicasts for unregistered grps */
148 u_long ips_nogif
; /* no match gif found */
149 u_long ips_badaddr
; /* invalid address on header */
155 #define ipstat ipstats_percpu[mycpuid]
157 #define ipstat ipstats_percpu[0]
160 extern struct ip_stats ipstats_percpu
[MAXCPU
];
162 /* flags passed to ip_output as last parameter */
163 #define IP_FORWARDING 0x1 /* most of ip header exists */
164 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
165 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
166 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
167 #define IP_DEBUGROUTE 0x10000 /* debug route */
169 /* direction passed to ip_cpufn as last parameter */
170 #define IP_MPORT_IN 0 /* Find lwkt port for incoming packets */
171 #define IP_MPORT_OUT 1 /* Find lwkt port for outgoing packets */
181 extern u_short ip_id
; /* ip packet ctr, for ids */
182 extern int ip_defttl
; /* default IP ttl */
183 extern int ipforwarding
; /* ip forwarding */
184 extern u_char ip_protox
[];
185 extern struct socket
*ip_rsvpd
; /* reservation protocol daemon */
186 extern struct socket
*ip_mrouter
; /* multicast routing daemon */
187 extern int (*legal_vif_num
)(int);
188 extern u_long (*ip_mcast_src
)(int);
190 extern struct pr_usrreqs rip_usrreqs
;
192 void ip_ctloutput(union netmsg
*);
194 int ip_fragment(struct ip
*ip
, struct mbuf
**m_frag
, int mtu
,
195 u_long if_hwassist_flags
, int sw_csum
);
197 ip_reass(struct mbuf
*);
198 void ip_freemoptions(struct ip_moptions
*);
200 extern int (*ip_mforward
)(struct ip
*, struct ifnet
*, struct mbuf
*,
201 struct ip_moptions
*);
203 void ip_cpufn(struct mbuf
**, int, int);
204 void ip_cpufn_in(struct mbuf
**, int);
205 void ip_hashcheck(struct mbuf
*, const struct pktinfo
*);
208 ip_lengthcheck(struct mbuf
**, int);
209 int ip_output(struct mbuf
*,
210 struct mbuf
*, struct route
*, int, struct ip_moptions
*,
213 ip_rtaddr(struct in_addr
, struct route
*);
214 void ip_savecontrol(struct inpcb
*, struct mbuf
**, struct ip
*,
216 void ip_slowtimo(void);
218 ip_srcroute(struct mbuf
*);
219 void ip_stripoptions(struct mbuf
*);
220 u_int16_t
ip_randomid(void);
221 void rip_ctloutput(union netmsg
*);
222 void rip_ctlinput(union netmsg
*);
224 int rip_input(struct mbuf
**, int *, int);
225 int rip_output(struct mbuf
*, struct socket
*, ...);
226 extern int (*ipip_input
)(struct mbuf
**, int *, int);
227 int rsvp_input(struct mbuf
**, int *, int);
228 int ip_rsvp_init(struct socket
*);
229 int ip_rsvp_done(void);
230 extern int (*ip_rsvp_vif
)(struct socket
*, struct sockopt
*);
231 extern void (*ip_rsvp_force_done
)(struct socket
*);
232 extern int (*rsvp_input_p
)(struct mbuf
**, int *, int);
234 extern struct pfil_head inet_pfil_hook
;
236 void in_delayed_cksum(struct mbuf
*m
);
238 static __inline
uint16_t ip_newid(void);
239 extern int ip_do_randomid
;
241 static __inline
uint16_t
245 return ip_randomid();
247 return __htons(ip_id
++);
252 #endif /* !_NETINET_IP_VAR_H_ */