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33 * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
34 * $FreeBSD: src/sys/netinet/ip_var.h,v 1.50.2.12 2003/02/27 04:50:02 silby Exp $
37 #ifndef _NETINET_IP_VAR_H_
38 #define _NETINET_IP_VAR_H_
40 #include <sys/queue.h>
43 * Overlay for ip header used by other protocols (tcp, udp).
46 u_char ih_x1[9]; /* (unused) */
47 u_char ih_pr; /* protocol */
48 u_short ih_len; /* protocol length */
49 struct in_addr ih_src; /* source internet address */
50 struct in_addr ih_dst; /* destination internet address */
54 * Ip reassembly queue structure. Each fragment
55 * being reassembled is attached to one of these structures.
56 * They are timed out after ipq_ttl drops to 0, and may also
57 * be reclaimed if memory becomes tight.
60 struct ipq *next,*prev; /* to other reass headers */
61 u_char ipq_ttl; /* time for reass q to live */
62 u_char ipq_p; /* protocol of this fragment */
63 u_short ipq_id; /* sequence id for reassembly */
64 struct mbuf *ipq_frags; /* to ip headers of fragments */
65 struct in_addr ipq_src,ipq_dst;
66 u_char ipq_nfrags; /* # frags in this packet */
68 u_int32_t ipq_div_info; /* ipfw divert port & flags */
69 u_int16_t ipq_div_cookie; /* ipfw divert cookie */
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 */
101 u_long ips_total; /* total packets received */
102 u_long ips_badsum; /* checksum bad */
103 u_long ips_tooshort; /* packet too short */
104 u_long ips_toosmall; /* not enough data */
105 u_long ips_badhlen; /* ip header length < data size */
106 u_long ips_badlen; /* ip length < ip header length */
107 u_long ips_fragments; /* fragments received */
108 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
109 u_long ips_fragtimeout; /* fragments timed out */
110 u_long ips_forward; /* packets forwarded */
111 u_long ips_fastforward; /* packets fast forwarded */
112 u_long ips_cantforward; /* packets rcvd for unreachable dest */
113 u_long ips_redirectsent; /* packets forwarded on same net */
114 u_long ips_noproto; /* unknown or unsupported protocol */
115 u_long ips_delivered; /* datagrams delivered to upper level*/
116 u_long ips_localout; /* total ip packets generated here */
117 u_long ips_odropped; /* lost packets due to nobufs, etc. */
118 u_long ips_reassembled; /* total packets reassembled ok */
119 u_long ips_fragmented; /* datagrams successfully fragmented */
120 u_long ips_ofragments; /* output fragments created */
121 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
122 u_long ips_badoptions; /* error in option processing */
123 u_long ips_noroute; /* packets discarded due to no route */
124 u_long ips_badvers; /* ip version != 4 */
125 u_long ips_rawout; /* total raw ip packets generated */
126 u_long ips_toolong; /* ip length > max ip packet size */
127 u_long ips_notmember; /* multicasts for unregistered grps */
128 u_long ips_nogif; /* no match gif found */
129 u_long ips_badaddr; /* invalid address on header */
134 /* flags passed to ip_output as last parameter */
135 #define IP_FORWARDING 0x1 /* most of ip header exists */
136 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
137 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
138 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
145 extern struct ipstat ipstat;
147 extern u_short ip_id; /* ip packet ctr, for ids */
149 extern int ip_defttl; /* default IP ttl */
150 extern int ipforwarding; /* ip forwarding */
151 extern struct route ipforward_rt; /* ip forwarding cached route */
152 extern u_char ip_protox[];
153 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
154 extern struct socket *ip_mrouter; /* multicast routing daemon */
155 extern int (*legal_vif_num)(int);
156 extern u_long (*ip_mcast_src)(int);
158 extern struct pr_usrreqs rip_usrreqs;
160 int ip_ctloutput(struct socket *, struct sockopt *sopt);
162 void ip_freemoptions(struct ip_moptions *);
164 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
165 struct ip_moptions *);
166 int ip_output(struct mbuf *,
167 struct mbuf *, struct route *, int, struct ip_moptions *,
170 ip_rtaddr(struct in_addr, struct route *);
171 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
173 void ip_slowtimo(void);
176 void ip_stripoptions(struct mbuf *, struct mbuf *);
181 int rip_ctloutput(struct socket *, struct sockopt *);
182 void rip_ctlinput(int, struct sockaddr *, void *);
184 void rip_input(struct mbuf *, int, int);
185 int rip_output(struct mbuf *, struct socket *, u_long);
186 extern void (*ipip_input)(struct mbuf *, int, int);
187 void rsvp_input(struct mbuf *, int, int);
188 int ip_rsvp_init(struct socket *);
189 int ip_rsvp_done(void);
190 extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
191 extern void (*ip_rsvp_force_done)(struct socket *);
192 extern void (*rsvp_input_p)(struct mbuf *m, int off, int proto);
196 void div_input(struct mbuf *, int, int);
197 void divert_packet(struct mbuf *m, int incoming, int port, int rule);
198 extern struct pr_usrreqs div_usrreqs;
201 void in_delayed_cksum(struct mbuf *m);
205 #endif /* !_NETINET_IP_VAR_H_ */