Annotation of src/sys/netinet/ip_var.h, Revision 1.92
1.92 ! rmind 1: /* $NetBSD: ip_var.h,v 1.91 2009/02/01 17:04:11 pooka 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.
1.57 agc 15: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: *
1.24 thorpej 31: * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
1.1 cgd 32: */
33:
1.25 perry 34: #ifndef _NETINET_IP_VAR_H_
35: #define _NETINET_IP_VAR_H_
1.53 martin 36:
1.15 cgd 37: #include <sys/queue.h>
1.30 thorpej 38: #include <net/route.h>
1.15 cgd 39:
1.1 cgd 40: /*
41: * Overlay for ip header used by other protocols (tcp, udp).
42: */
43: struct ipovly {
1.18 thorpej 44: u_int8_t ih_x1[9]; /* (unused) */
45: u_int8_t ih_pr; /* protocol */
46: u_int16_t ih_len; /* protocol length */
47: struct in_addr ih_src; /* source internet address */
48: struct in_addr ih_dst; /* destination internet address */
1.83 perry 49: } __packed;
1.1 cgd 50:
51: /*
1.15 cgd 52: * Ip (reassembly or sequence) queue structures.
53: *
54: * XXX -- The following explains why the ipqe_m field is here, for TCP's use:
55: * We want to avoid doing m_pullup on incoming packets but that
56: * means avoiding dtom on the tcp reassembly code. That in turn means
57: * keeping an mbuf pointer in the reassembly queue (since we might
58: * have a cluster). As a quick hack, the source & destination
59: * port numbers (which are no longer needed once we've located the
60: * tcpcb) are overlayed with an mbuf pointer.
61: */
1.47 matt 62: TAILQ_HEAD(ipqehead, ipqent);
1.15 cgd 63: struct ipqent {
1.47 matt 64: TAILQ_ENTRY(ipqent) ipqe_q;
1.15 cgd 65: union {
66: struct ip *_ip;
67: struct tcpiphdr *_tcp;
68: } _ipqe_u1;
1.47 matt 69: struct mbuf *ipqe_m; /* point to first mbuf */
70: struct mbuf *ipre_mlast; /* point to last mbuf */
1.20 thorpej 71: u_int8_t ipqe_mff; /* for IP fragmentation */
1.28 matt 72: /*
73: * The following are used in TCP reassembly
74: */
1.47 matt 75: TAILQ_ENTRY(ipqent) ipqe_timeq;
1.28 matt 76: u_int32_t ipqe_seq;
77: u_int32_t ipqe_len;
78: u_int32_t ipqe_flags;
1.15 cgd 79: };
80: #define ipqe_ip _ipqe_u1._ip
81: #define ipqe_tcp _ipqe_u1._tcp
82:
83: /*
1.1 cgd 84: * Ip reassembly queue structure. Each fragment
85: * being reassembled is attached to one of these structures.
86: * They are timed out after ipq_ttl drops to 0, and may also
87: * be reclaimed if memory becomes tight.
88: */
89: struct ipq {
1.15 cgd 90: LIST_ENTRY(ipq) ipq_q; /* to other reass headers */
1.12 cgd 91: u_int8_t ipq_ttl; /* time for reass q to live */
92: u_int8_t ipq_p; /* protocol of this fragment */
93: u_int16_t ipq_id; /* sequence id for reassembly */
1.15 cgd 94: struct ipqehead ipq_fragq; /* to ip fragment queue */
1.14 mycroft 95: struct in_addr ipq_src, ipq_dst;
1.64 jonathan 96: u_int16_t ipq_nfrags; /* frags in this queue entry */
1.81 matt 97: u_int8_t ipq_tos; /* TOS of this fragment */
1.1 cgd 98: };
99:
100: /*
101: * Structure stored in mbuf in inpcb.ip_options
102: * and passed to ip_output when ip options are in use.
103: * The actual length of the options (including ipopt_dst)
104: * is in m_len.
105: */
1.5 mycroft 106: #define MAX_IPOPTLEN 40
1.1 cgd 107:
108: struct ipoption {
109: struct in_addr ipopt_dst; /* first-hop dst if source routed */
1.12 cgd 110: int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
1.1 cgd 111: };
112:
1.4 hpeyerl 113: /*
114: * Structure attached to inpcb.ip_moptions and
115: * passed to ip_output when IP multicast options are in use.
116: */
117: struct ip_moptions {
1.12 cgd 118: struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
1.44 itojun 119: struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
1.12 cgd 120: u_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */
121: u_int8_t imo_multicast_loop; /* 1 => hear sends if a member */
122: u_int16_t imo_num_memberships; /* no. memberships this socket */
123: struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
1.4 hpeyerl 124: };
125:
1.85 thorpej 126: /*
127: * IP statistics.
128: * Each counter is an unsigned 64-bit value.
129: */
130: #define IP_STAT_TOTAL 0 /* total packets received */
131: #define IP_STAT_BADSUM 1 /* checksum bad */
132: #define IP_STAT_TOOSHORT 2 /* packet too short */
133: #define IP_STAT_TOOSMALL 3 /* not enough data */
134: #define IP_STAT_BADHLEN 4 /* ip header length < data size */
135: #define IP_STAT_BADLEN 5 /* ip length < ip header length */
136: #define IP_STAT_FRAGMENTS 6 /* fragments received */
137: #define IP_STAT_FRAGDROPPED 7 /* frags dropped (dups, out of space) */
138: #define IP_STAT_FRAGTIMEOUT 8 /* fragments timed out */
139: #define IP_STAT_FORWARD 9 /* packets forwarded */
140: #define IP_STAT_FASTFORWARD 10 /* packets fast forwarded */
141: #define IP_STAT_CANTFORWARD 11 /* packets rcvd for unreachable dest */
142: #define IP_STAT_REDIRECTSENT 12 /* packets forwareded on same net */
143: #define IP_STAT_NOPROTO 13 /* unknown or unsupported protocol */
144: #define IP_STAT_DELIVERED 14 /* datagrams delivered to upper level */
145: #define IP_STAT_LOCALOUT 15 /* total ip packets generated here */
146: #define IP_STAT_ODROPPED 16 /* lost packets due to nobufs, etc. */
147: #define IP_STAT_REASSEMBLED 17 /* total packets reassembled ok */
148: #define IP_STAT_FRAGMENTED 18 /* datagrams successfully fragmented */
149: #define IP_STAT_OFRAGMENTS 19 /* output fragments created */
150: #define IP_STAT_CANTFRAG 20 /* don't fragment flag was set, etc. */
151: #define IP_STAT_BADOPTIONS 21 /* error in option processing */
152: #define IP_STAT_NOROUTE 22 /* packets discarded due to no route */
153: #define IP_STAT_BADVERS 23 /* ip version != 4 */
154: #define IP_STAT_RAWOUT 24 /* total raw ip packets generated */
155: #define IP_STAT_BADFRAGS 25 /* malformed fragments (bad length) */
156: #define IP_STAT_RCVMEMDROP 26 /* frags dropped for lack of memory */
157: #define IP_STAT_TOOLONG 27 /* ip length > max ip packet size */
158: #define IP_STAT_NOGIF 28 /* no match gif found */
159: #define IP_STAT_BADADDR 29 /* invalid address on header */
160:
161: #define IP_NSTATS 30
1.1 cgd 162:
1.11 jtc 163: #ifdef _KERNEL
1.54 martin 164:
165: #ifdef _KERNEL_OPT
166: #include "opt_gateway.h"
167: #include "opt_mbuftrace.h"
168: #endif
169:
1.1 cgd 170: /* flags passed to ip_output as last parameter */
171: #define IP_FORWARDING 0x1 /* most of ip header exists */
1.9 mycroft 172: #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
1.21 thorpej 173: #define IP_RETURNMTU 0x4 /* pass back mtu on EMSGSIZE */
1.84 matt 174: #define IP_NOIPNEWID 0x8 /* don't fill in ip_id */
1.1 cgd 175: #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
176: #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
1.43 thorpej 177: #define IP_MTUDISC 0x0400 /* Path MTU Discovery; set DF */
1.48 thorpej 178:
1.68 matt 179: extern struct domain inetdomain;
180:
1.63 jonathan 181: extern LIST_HEAD(ipqhead, ipq) ipq[]; /* ip reass. queue */
1.29 matt 182: extern int ip_defttl; /* default IP ttl */
183: extern int ipforwarding; /* ip forwarding */
1.27 kml 184: extern int ip_mtudisc; /* mtu discovery */
1.49 itojun 185: extern int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
1.27 kml 186: extern int anonportmin; /* minimum ephemeral port */
187: extern int anonportmax; /* maximum ephemeral port */
1.42 tron 188: extern int lowportmin; /* minimum reserved port */
189: extern int lowportmax; /* maximum reserved port */
1.69 thorpej 190: extern int ip_do_loopback_cksum; /* do IP checksum on loopback? */
1.27 kml 191: extern struct rttimer_queue *ip_mtudisc_timeout_q;
1.51 matt 192: #ifdef MBUFTRACE
193: extern struct mowner ip_rx_mowner;
194: extern struct mowner ip_tx_mowner;
195: #endif
1.31 matt 196: #ifdef GATEWAY
197: extern int ip_maxflows;
1.79 liamjfoy 198: extern int ip_hashsize;
1.31 matt 199: #endif
1.52 matt 200: extern struct pool inmulti_pool;
1.19 thorpej 201: struct inpcb;
1.88 plunky 202: struct sockopt;
1.19 thorpej 203:
1.88 plunky 204: int ip_ctloutput(int, struct socket *, struct sockopt *);
1.67 itojun 205: int ip_dooptions(struct mbuf *);
206: void ip_drain(void);
207: void ip_forward(struct mbuf *, int);
208: void ip_freemoptions(struct ip_moptions *);
1.88 plunky 209: int ip_getmoptions(struct ip_moptions *, struct sockopt *);
1.67 itojun 210: void ip_init(void);
211: int ip_optcopy(struct ip *, struct ip *);
212: u_int ip_optlen(struct inpcb *);
213: int ip_output(struct mbuf *, ...);
214: int ip_fragment(struct mbuf *, struct ifnet *, u_long);
1.90 plunky 215: int ip_pcbopts(struct mbuf **, const struct sockopt *);
1.92 ! rmind 216:
! 217: struct ipq *
! 218: ip_reass_lookup(struct ip *, u_int *);
! 219: void ip_reass_unlock(void);
! 220: struct ipqent *
! 221: ip_reass_getent(void);
1.20 thorpej 222: struct mbuf *
1.92 ! rmind 223: ip_reass(struct ipqent *, struct ipq *, u_int);
! 224: void ip_reass_slowtimo(void);
! 225: void ip_reass_drain(void);
! 226: void ip_freef(struct ipq *);
! 227:
1.6 mycroft 228: struct in_ifaddr *
1.67 itojun 229: ip_rtaddr(struct in_addr);
230: void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
1.66 matt 231: struct mbuf *);
1.89 plunky 232: int ip_setmoptions(struct ip_moptions **, const struct sockopt *);
1.67 itojun 233: void ip_slowtimo(void);
1.6 mycroft 234: struct mbuf *
1.67 itojun 235: ip_srcroute(void);
236: int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
1.87 thorpej 237: void ip_statinc(u_int);
1.67 itojun 238: void ipintr(void);
1.78 dyoung 239: void * rip_ctlinput(int, const struct sockaddr *, void *);
1.88 plunky 240: int rip_ctloutput(int, struct socket *, struct sockopt *);
1.67 itojun 241: void rip_init(void);
242: void rip_input(struct mbuf *, ...);
243: int rip_output(struct mbuf *, ...);
244: int rip_usrreq(struct socket *,
1.75 christos 245: int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
1.79 liamjfoy 246: int ipflow_init(int);
1.91 pooka 247: void ipflow_poolinit(void);
1.86 thorpej 248: void ipflow_prune(void);
1.67 itojun 249: void ipflow_create(const struct route *, struct mbuf *);
250: void ipflow_slowtimo(void);
1.79 liamjfoy 251: int ipflow_invalidate_all(int);
1.59 itojun 252:
1.60 jonathan 253: #endif /* _KERNEL */
1.25 perry 254:
1.74 elad 255: #endif /* !_NETINET_IP_VAR_H_ */
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