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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 1.19 2006/05/20 02:42:12 dillon Exp $
38 #ifndef _NETINET_IP_VAR_H_
39 #define _NETINET_IP_VAR_H_
42 #include <sys/types.h>
45 #include <sys/queue.h>
47 #ifndef _NETINET_IN_H_
48 #include <netinet/in.h>
53 #ifndef _MACHINE_ENDIAN_H_
54 #include <machine/endian.h>
56 #ifndef _MACHINE_PARAM_H_
57 #include <machine/param.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 struct ipq *next,*prev; /* 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 */
88 u_int32_t ipq_div_info; /* ipfw divert port & flags */
93 * Structure stored in mbuf in inpcb.ip_options
94 * and passed to ip_output when ip options are in use.
95 * The actual length of the options (including ipopt_dst)
98 #define MAX_IPOPTLEN 40
101 struct in_addr ipopt_dst; /* first-hop dst if source routed */
102 char ipopt_list[MAX_IPOPTLEN]; /* options proper */
106 * Structure attached to inpcb.ip_moptions and
107 * passed to ip_output when IP multicast options are in use.
110 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
111 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
112 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
113 u_char imo_multicast_loop; /* 1 => hear sends if a member */
114 u_short imo_num_memberships; /* no. memberships this socket */
115 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
116 u_long imo_multicast_vif; /* vif num outgoing multicasts */
122 #define ipstat ipstats_percpu[mycpuid]
124 #define ipstat ipstats_percpu[0]
128 extern struct ip_stats ipstats_percpu[MAXCPU];
136 u_long ips_total; /* total packets received */
137 u_long ips_badsum; /* checksum bad */
138 u_long ips_tooshort; /* packet too short */
139 u_long ips_toosmall; /* not enough data */
140 u_long ips_badhlen; /* ip header length < data size */
141 u_long ips_badlen; /* ip length < ip header length */
142 u_long ips_fragments; /* fragments received */
143 u_long ips_fragdropped; /* frags dropped (dups, out of space) */
144 u_long ips_fragtimeout; /* fragments timed out */
145 u_long ips_forward; /* packets forwarded */
146 u_long ips_fastforward; /* packets fast forwarded */
147 u_long ips_cantforward; /* packets rcvd for unreachable dest */
148 u_long ips_redirectsent; /* packets forwarded on same net */
149 u_long ips_noproto; /* unknown or unsupported protocol */
150 u_long ips_delivered; /* datagrams delivered to upper level*/
151 u_long ips_localout; /* total ip packets generated here */
152 u_long ips_odropped; /* lost packets due to nobufs, etc. */
153 u_long ips_reassembled; /* total packets reassembled ok */
154 u_long ips_fragmented; /* datagrams successfully fragmented */
155 u_long ips_ofragments; /* output fragments created */
156 u_long ips_cantfrag; /* don't fragment flag was set, etc. */
157 u_long ips_badoptions; /* error in option processing */
158 u_long ips_noroute; /* packets discarded due to no route */
159 u_long ips_badvers; /* ip version != 4 */
160 u_long ips_rawout; /* total raw ip packets generated */
161 u_long ips_toolong; /* ip length > max ip packet size */
162 u_long ips_notmember; /* multicasts for unregistered grps */
163 u_long ips_nogif; /* no match gif found */
164 u_long ips_badaddr; /* invalid address on header */
169 /* flags passed to ip_output as last parameter */
170 #define IP_FORWARDING 0x1 /* most of ip header exists */
171 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
172 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
173 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast 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 struct route ipforward_rt[]; /* ip forwarding cached route */
185 extern u_char ip_protox[];
186 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
187 extern struct socket *ip_mrouter; /* multicast routing daemon */
188 extern int (*legal_vif_num)(int);
189 extern u_long (*ip_mcast_src)(int);
191 extern struct pr_usrreqs rip_usrreqs;
193 int ip_ctloutput(struct socket *, struct sockopt *sopt);
195 int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
196 u_long if_hwassist_flags, int sw_csum);
197 void ip_freemoptions(struct ip_moptions *);
199 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
200 struct ip_moptions *);
202 ip_mport(struct mbuf **);
204 ip_lengthcheck(struct mbuf **);
205 int ip_output(struct mbuf *,
206 struct mbuf *, struct route *, int, struct ip_moptions *,
209 ip_rtaddr(struct in_addr, struct route *);
210 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
212 void ip_slowtimo(void);
215 void ip_stripoptions(struct mbuf *);
216 u_int16_t ip_randomid(void);
217 int rip_ctloutput(struct socket *, struct sockopt *);
218 void rip_ctlinput(int, struct sockaddr *, void *);
220 void rip_input(struct mbuf *, ...);
221 int rip_output(struct mbuf *, struct socket *, ...);
222 extern void (*ipip_input)(struct mbuf *, int, int);
223 void rsvp_input(struct mbuf *, ...);
224 int ip_rsvp_init(struct socket *);
225 int ip_rsvp_done(void);
226 extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
227 extern void (*ip_rsvp_force_done)(struct socket *);
228 extern void (*rsvp_input_p)(struct mbuf *m, ...);
232 void div_input(struct mbuf *, ...);
233 void divert_packet(struct mbuf *m, int incoming, int port);
234 extern struct pr_usrreqs div_usrreqs;
237 extern struct pfil_head inet_pfil_hook;
239 void in_delayed_cksum(struct mbuf *m);
241 static __inline uint16_t ip_newid(void);
242 extern int ip_do_randomid;
244 static __inline uint16_t
248 return ip_randomid();
250 return __htons(ip_id++);
255 #endif /* !_NETINET_IP_VAR_H_ */