Annotation of src/sys/netinet/ip_var.h, Revision 1.47
1.47 ! matt 1: /* $NetBSD: ip_var.h,v 1.46 2001/12/21 02:51:47 itojun Exp $ */
1.10 cgd 2:
1.1 cgd 3: /*
1.9 mycroft 4: * Copyright (c) 1982, 1986, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
1.24 thorpej 35: * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
1.1 cgd 36: */
37:
1.25 perry 38: #ifndef _NETINET_IP_VAR_H_
39: #define _NETINET_IP_VAR_H_
40:
1.15 cgd 41: #include <sys/queue.h>
1.30 thorpej 42: #include <net/route.h>
1.15 cgd 43:
1.1 cgd 44: /*
45: * Overlay for ip header used by other protocols (tcp, udp).
46: */
47: struct ipovly {
1.18 thorpej 48: u_int8_t ih_x1[9]; /* (unused) */
49: u_int8_t ih_pr; /* protocol */
50: u_int16_t ih_len; /* protocol length */
51: struct in_addr ih_src; /* source internet address */
52: struct in_addr ih_dst; /* destination internet address */
1.40 thorpej 53: } __attribute__((__packed__));
1.1 cgd 54:
55: /*
1.15 cgd 56: * Ip (reassembly or sequence) queue structures.
57: *
58: * XXX -- The following explains why the ipqe_m field is here, for TCP's use:
59: * We want to avoid doing m_pullup on incoming packets but that
60: * means avoiding dtom on the tcp reassembly code. That in turn means
61: * keeping an mbuf pointer in the reassembly queue (since we might
62: * have a cluster). As a quick hack, the source & destination
63: * port numbers (which are no longer needed once we've located the
64: * tcpcb) are overlayed with an mbuf pointer.
65: */
1.47 ! matt 66: TAILQ_HEAD(ipqehead, ipqent);
1.15 cgd 67: struct ipqent {
1.47 ! matt 68: TAILQ_ENTRY(ipqent) ipqe_q;
1.15 cgd 69: union {
70: struct ip *_ip;
71: struct tcpiphdr *_tcp;
72: } _ipqe_u1;
1.47 ! matt 73: struct mbuf *ipqe_m; /* point to first mbuf */
! 74: struct mbuf *ipre_mlast; /* point to last mbuf */
1.20 thorpej 75: u_int8_t ipqe_mff; /* for IP fragmentation */
1.28 matt 76: /*
77: * The following are used in TCP reassembly
78: */
1.47 ! matt 79: TAILQ_ENTRY(ipqent) ipqe_timeq;
1.28 matt 80: u_int32_t ipqe_seq;
81: u_int32_t ipqe_len;
82: u_int32_t ipqe_flags;
1.15 cgd 83: };
84: #define ipqe_ip _ipqe_u1._ip
85: #define ipqe_tcp _ipqe_u1._tcp
86:
87: /*
1.1 cgd 88: * Ip reassembly queue structure. Each fragment
89: * being reassembled is attached to one of these structures.
90: * They are timed out after ipq_ttl drops to 0, and may also
91: * be reclaimed if memory becomes tight.
92: */
93: struct ipq {
1.15 cgd 94: LIST_ENTRY(ipq) ipq_q; /* to other reass headers */
1.12 cgd 95: u_int8_t ipq_ttl; /* time for reass q to live */
96: u_int8_t ipq_p; /* protocol of this fragment */
97: u_int16_t ipq_id; /* sequence id for reassembly */
1.15 cgd 98: struct ipqehead ipq_fragq; /* to ip fragment queue */
1.14 mycroft 99: struct in_addr ipq_src, ipq_dst;
1.1 cgd 100: };
101:
102: /*
103: * Structure stored in mbuf in inpcb.ip_options
104: * and passed to ip_output when ip options are in use.
105: * The actual length of the options (including ipopt_dst)
106: * is in m_len.
107: */
1.5 mycroft 108: #define MAX_IPOPTLEN 40
1.1 cgd 109:
110: struct ipoption {
111: struct in_addr ipopt_dst; /* first-hop dst if source routed */
1.12 cgd 112: int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
1.1 cgd 113: };
114:
1.4 hpeyerl 115: /*
116: * Structure attached to inpcb.ip_moptions and
117: * passed to ip_output when IP multicast options are in use.
118: */
119: struct ip_moptions {
1.12 cgd 120: struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
1.44 itojun 121: struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
1.12 cgd 122: u_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */
123: u_int8_t imo_multicast_loop; /* 1 => hear sends if a member */
124: u_int16_t imo_num_memberships; /* no. memberships this socket */
125: struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
1.4 hpeyerl 126: };
127:
1.1 cgd 128: struct ipstat {
1.39 bouyer 129: u_quad_t ips_total; /* total packets received */
130: u_quad_t ips_badsum; /* checksum bad */
131: u_quad_t ips_tooshort; /* packet too short */
132: u_quad_t ips_toosmall; /* not enough data */
133: u_quad_t ips_badhlen; /* ip header length < data size */
134: u_quad_t ips_badlen; /* ip length < ip header length */
135: u_quad_t ips_fragments; /* fragments received */
136: u_quad_t ips_fragdropped; /* frags dropped (dups, out of space) */
137: u_quad_t ips_fragtimeout; /* fragments timed out */
138: u_quad_t ips_forward; /* packets forwarded */
139: u_quad_t ips_fastforward; /* packets fast forwarded */
140: u_quad_t ips_cantforward; /* packets rcvd for unreachable dest */
141: u_quad_t ips_redirectsent; /* packets forwarded on same net */
142: u_quad_t ips_noproto; /* unknown or unsupported protocol */
143: u_quad_t ips_delivered; /* datagrams delivered to upper level*/
144: u_quad_t ips_localout; /* total ip packets generated here */
145: u_quad_t ips_odropped; /* lost packets due to nobufs, etc. */
146: u_quad_t ips_reassembled; /* total packets reassembled ok */
147: u_quad_t ips_fragmented; /* datagrams sucessfully fragmented */
148: u_quad_t ips_ofragments; /* output fragments created */
149: u_quad_t ips_cantfrag; /* don't fragment flag was set, etc. */
150: u_quad_t ips_badoptions; /* error in option processing */
151: u_quad_t ips_noroute; /* packets discarded due to no route */
152: u_quad_t ips_badvers; /* ip version != 4 */
153: u_quad_t ips_rawout; /* total raw ip packets generated */
154: u_quad_t ips_badfrags; /* malformed fragments (bad length) */
155: u_quad_t ips_rcvmemdrop; /* frags dropped for lack of memory */
156: u_quad_t ips_toolong; /* ip length > max ip packet size */
157: u_quad_t ips_nogif; /* no match gif found */
1.45 itojun 158: u_quad_t ips_badaddr; /* invalid address on header */
1.1 cgd 159: };
160:
1.29 matt 161: #define IPFLOW_HASHBITS 6 /* should not be a multiple of 8 */
162: struct ipflow {
1.34 thorpej 163: LIST_ENTRY(ipflow) ipf_list; /* next in active list */
164: LIST_ENTRY(ipflow) ipf_hash; /* next ipflow in bucket */
1.29 matt 165: struct in_addr ipf_dst; /* destination address */
166: struct in_addr ipf_src; /* source address */
167: u_int8_t ipf_tos; /* type-of-service */
168: struct route ipf_ro; /* associated route entry */
169: u_long ipf_uses; /* number of uses in this period */
170: u_long ipf_last_uses; /* number of uses in last period */
171: u_long ipf_dropped; /* ENOBUFS returned by if_output */
172: u_long ipf_errors; /* other errors returned by if_output */
1.34 thorpej 173: u_int ipf_timer; /* lifetime timer */
1.29 matt 174: time_t ipf_start; /* creation time */
175: };
176:
1.11 jtc 177: #ifdef _KERNEL
1.1 cgd 178: /* flags passed to ip_output as last parameter */
179: #define IP_FORWARDING 0x1 /* most of ip header exists */
1.9 mycroft 180: #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
1.21 thorpej 181: #define IP_RETURNMTU 0x4 /* pass back mtu on EMSGSIZE */
1.1 cgd 182: #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
183: #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
1.43 thorpej 184: #define IP_MTUDISC 0x0400 /* Path MTU Discovery; set DF */
1.1 cgd 185:
1.29 matt 186: extern struct ipstat ipstat; /* ip statistics */
187: extern LIST_HEAD(ipqhead, ipq) ipq; /* ip reass. queue */
188: extern u_int16_t ip_id; /* ip packet ctr, for ids */
189: extern int ip_defttl; /* default IP ttl */
190: extern int ipforwarding; /* ip forwarding */
1.27 kml 191: extern int ip_mtudisc; /* mtu discovery */
192: extern u_int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
193: extern int anonportmin; /* minimum ephemeral port */
194: extern int anonportmax; /* maximum ephemeral port */
1.42 tron 195: extern int lowportmin; /* minimum reserved port */
196: extern int lowportmax; /* maximum reserved port */
1.27 kml 197: extern struct rttimer_queue *ip_mtudisc_timeout_q;
1.31 matt 198: #ifdef GATEWAY
199: extern int ip_maxflows;
200: #endif
1.35 thorpej 201: extern struct pool ipqent_pool;
1.19 thorpej 202: struct inpcb;
203:
1.9 mycroft 204: int ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
205: int ip_dooptions __P((struct mbuf *));
206: void ip_drain __P((void));
207: void ip_forward __P((struct mbuf *, int));
208: void ip_freef __P((struct ipq *));
209: void ip_freemoptions __P((struct ip_moptions *));
210: int ip_getmoptions __P((int, struct ip_moptions *, struct mbuf **));
211: void ip_init __P((void));
212: int ip_optcopy __P((struct ip *, struct ip *));
1.26 kml 213: u_int ip_optlen __P((struct inpcb *));
1.16 christos 214: int ip_output __P((struct mbuf *, ...));
1.9 mycroft 215: int ip_pcbopts __P((struct mbuf **, struct mbuf *));
1.20 thorpej 216: struct mbuf *
1.15 cgd 217: ip_reass __P((struct ipqent *, struct ipq *));
1.6 mycroft 218: struct in_ifaddr *
1.9 mycroft 219: ip_rtaddr __P((struct in_addr));
1.19 thorpej 220: void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
221: struct mbuf *));
1.9 mycroft 222: int ip_setmoptions __P((int, struct ip_moptions **, struct mbuf *));
223: void ip_slowtimo __P((void));
1.6 mycroft 224: struct mbuf *
1.9 mycroft 225: ip_srcroute __P((void));
226: void ip_stripoptions __P((struct mbuf *, struct mbuf *));
227: int ip_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
228: void ipintr __P((void));
1.46 itojun 229: void * rip_ctlinput __P((int, struct sockaddr *, void *));
1.9 mycroft 230: int rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
231: void rip_init __P((void));
1.16 christos 232: void rip_input __P((struct mbuf *, ...));
233: int rip_output __P((struct mbuf *, ...));
1.9 mycroft 234: int rip_usrreq __P((struct socket *,
1.17 mycroft 235: int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
1.36 thorpej 236: void ipflow_init __P((void));
1.31 matt 237: struct ipflow *ipflow_reap __P((int));
238: void ipflow_create __P((const struct route *, struct mbuf *));
239: void ipflow_slowtimo __P((void));
1.1 cgd 240: #endif
1.25 perry 241:
242: #endif /* _NETINET_IP_VAR_H_ */
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