Annotation of sys/netinet/ip_var.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ip_var.h,v 1.36 2006/05/29 20:42:27 claudio Exp $ */
! 2: /* $NetBSD: ip_var.h,v 1.16 1996/02/13 23:43:20 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
! 33: */
! 34:
! 35: #ifndef _NETINET_IP_VAR_H_
! 36: #define _NETINET_IP_VAR_H_
! 37:
! 38: #include <sys/queue.h>
! 39:
! 40: /*
! 41: * Overlay for ip header used by other protocols (tcp, udp).
! 42: */
! 43: struct ipovly {
! 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 */
! 49: };
! 50:
! 51: /*
! 52: * Ip reassembly queue structures.
! 53: */
! 54: LIST_HEAD(ipqehead, ipqent);
! 55: struct ipqent {
! 56: LIST_ENTRY(ipqent) ipqe_q;
! 57: struct ip *ipqe_ip;
! 58: struct mbuf *ipqe_m; /* mbuf contains packet */
! 59: u_int8_t ipqe_mff; /* for IP fragmentation */
! 60: };
! 61:
! 62: /*
! 63: * Ip reassembly queue structure. Each fragment
! 64: * being reassembled is attached to one of these structures.
! 65: * They are timed out after ipq_ttl drops to 0, and may also
! 66: * be reclaimed if memory becomes tight.
! 67: */
! 68: struct ipq {
! 69: LIST_ENTRY(ipq) ipq_q; /* to other reass headers */
! 70: u_int8_t ipq_ttl; /* time for reass q to live */
! 71: u_int8_t ipq_p; /* protocol of this fragment */
! 72: u_int16_t ipq_id; /* sequence id for reassembly */
! 73: struct ipqehead ipq_fragq; /* to ip fragment queue */
! 74: struct in_addr ipq_src, ipq_dst;
! 75: };
! 76:
! 77: /*
! 78: * Structure stored in mbuf in inpcb.ip_options
! 79: * and passed to ip_output when ip options are in use.
! 80: * The actual length of the options (including ipopt_dst)
! 81: * is in m_len.
! 82: */
! 83: #define MAX_IPOPTLEN 40
! 84:
! 85: struct ipoption {
! 86: struct in_addr ipopt_dst; /* first-hop dst if source routed */
! 87: int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
! 88: };
! 89:
! 90: /*
! 91: * Structure attached to inpcb.ip_moptions and
! 92: * passed to ip_output when IP multicast options are in use.
! 93: */
! 94: struct ip_moptions {
! 95: struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
! 96: u_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */
! 97: u_int8_t imo_multicast_loop; /* 1 => hear sends if a member */
! 98: u_int16_t imo_num_memberships; /* no. memberships this socket */
! 99: struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
! 100: };
! 101:
! 102: struct ipstat {
! 103: u_long ips_total; /* total packets received */
! 104: u_long ips_badsum; /* checksum bad */
! 105: u_long ips_tooshort; /* packet too short */
! 106: u_long ips_toosmall; /* not enough data */
! 107: u_long ips_badhlen; /* ip header length < data size */
! 108: u_long ips_badlen; /* ip length < ip header length */
! 109: u_long ips_fragments; /* fragments received */
! 110: u_long ips_fragdropped; /* frags dropped (dups, out of space) */
! 111: u_long ips_fragtimeout; /* fragments timed out */
! 112: u_long ips_forward; /* packets forwarded */
! 113: u_long ips_cantforward; /* packets rcvd for unreachable dest */
! 114: u_long ips_redirectsent; /* packets forwarded on same net */
! 115: u_long ips_noproto; /* unknown or unsupported protocol */
! 116: u_long ips_delivered; /* datagrams delivered to upper level*/
! 117: u_long ips_localout; /* total ip packets generated here */
! 118: u_long ips_odropped; /* lost packets due to nobufs, etc. */
! 119: u_long ips_reassembled; /* total packets reassembled ok */
! 120: u_long ips_fragmented; /* datagrams successfully fragmented */
! 121: u_long ips_ofragments; /* output fragments created */
! 122: u_long ips_cantfrag; /* don't fragment flag was set, etc. */
! 123: u_long ips_badoptions; /* error in option processing */
! 124: u_long ips_noroute; /* packets discarded due to no route */
! 125: u_long ips_badvers; /* ip version != 4 */
! 126: u_long ips_rawout; /* total raw ip packets generated */
! 127: u_long ips_badfrags; /* malformed fragments (bad length) */
! 128: u_long ips_rcvmemdrop; /* frags dropped for lack of memory */
! 129: u_long ips_toolong; /* ip length > max ip packet size */
! 130: u_long ips_nogif; /* no match gif found */
! 131: u_long ips_badaddr; /* invalid address on header */
! 132: u_long ips_inhwcsum; /* hardware checksummed on input */
! 133: u_long ips_outhwcsum; /* hardware checksummed on output */
! 134: u_long ips_notmember; /* multicasts for unregistered groups */
! 135: };
! 136:
! 137: #ifdef _KERNEL
! 138: /* flags passed to ip_output as last parameter */
! 139: #define IP_FORWARDING 0x1 /* most of ip header exists */
! 140: #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
! 141: #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
! 142: #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
! 143: #define IP_JUMBO SO_JUMBO /* try to use the jumbo mtu */
! 144: #define IP_MTUDISC 0x0800 /* pmtu discovery, set DF */
! 145: #define IP_ROUTETOETHER 0x1000 /* ether addresses given */
! 146:
! 147: extern struct ipstat ipstat;
! 148: extern LIST_HEAD(ipqhead, ipq) ipq; /* ip reass. queue */
! 149: extern int ip_defttl; /* default IP ttl */
! 150:
! 151: extern int ip_mtudisc; /* mtu discovery */
! 152: extern u_int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */
! 153: extern struct rttimer_queue *ip_mtudisc_timeout_q;
! 154: extern struct pool ipqent_pool;
! 155: struct inpcb;
! 156:
! 157: int ip_ctloutput(int, struct socket *, int, int, struct mbuf **);
! 158: int ip_dooptions(struct mbuf *);
! 159: void ip_drain(void);
! 160: void ip_flush(void);
! 161: void ip_forward(struct mbuf *, int);
! 162: int ip_fragment(struct mbuf *, struct ifnet *, u_long);
! 163: void ip_freef(struct ipq *);
! 164: void ip_freemoptions(struct ip_moptions *);
! 165: int ip_getmoptions(int, struct ip_moptions *, struct mbuf **);
! 166: void ip_init(void);
! 167: int ip_mforward(struct mbuf *, struct ifnet *);
! 168: int ip_optcopy(struct ip *, struct ip *);
! 169: int ip_output(struct mbuf *, ...);
! 170: int ip_pcbopts(struct mbuf **, struct mbuf *);
! 171: struct mbuf *
! 172: ip_reass(struct ipqent *, struct ipq *);
! 173: struct in_ifaddr *
! 174: in_iawithaddr(struct in_addr, struct mbuf *);
! 175: struct in_ifaddr *
! 176: ip_rtaddr(struct in_addr);
! 177: u_int16_t
! 178: ip_randomid(void);
! 179: int ip_setmoptions(int, struct ip_moptions **, struct mbuf *);
! 180: void ip_slowtimo(void);
! 181: struct mbuf *
! 182: ip_srcroute(void);
! 183: void ip_stripoptions(struct mbuf *, struct mbuf *);
! 184: int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
! 185: void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
! 186: struct mbuf *);
! 187: void ipintr(void);
! 188: void ipv4_input(struct mbuf *);
! 189: int rip_ctloutput(int, struct socket *, int, int, struct mbuf **);
! 190: void rip_init(void);
! 191: void rip_input(struct mbuf *, ...);
! 192: int rip_output(struct mbuf *, ...);
! 193: int rip_usrreq(struct socket *,
! 194: int, struct mbuf *, struct mbuf *, struct mbuf *);
! 195: #endif /* _KERNEL */
! 196: #endif /* _NETINET_IP_VAR_H_ */
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