ip_var.h revision 1.9
1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)ip_var.h 8.1 (Berkeley) 6/10/93 34 * $Id: ip_var.h,v 1.9 1994/05/13 06:06:28 mycroft Exp $ 35 */ 36 37 /* 38 * Overlay for ip header used by other protocols (tcp, udp). 39 */ 40 struct ipovly { 41 caddr_t ih_next, ih_prev; /* for protocol sequence q's */ 42 u_char ih_x1; /* (unused) */ 43 u_char ih_pr; /* protocol */ 44 short ih_len; /* protocol length */ 45 struct in_addr ih_src; /* source internet address */ 46 struct in_addr ih_dst; /* destination internet address */ 47 }; 48 49 /* 50 * Ip reassembly queue structure. Each fragment 51 * being reassembled is attached to one of these structures. 52 * They are timed out after ipq_ttl drops to 0, and may also 53 * be reclaimed if memory becomes tight. 54 */ 55 struct ipq { 56 struct ipq *next,*prev; /* to other reass headers */ 57 u_char ipq_ttl; /* time for reass q to live */ 58 u_char ipq_p; /* protocol of this fragment */ 59 u_short ipq_id; /* sequence id for reassembly */ 60 struct ipasfrag *ipq_next,*ipq_prev; 61 /* to ip headers of fragments */ 62 struct in_addr ipq_src,ipq_dst; 63 }; 64 65 /* 66 * Ip header, when holding a fragment. 67 * 68 * Note: ipf_next must be at same offset as ipq_next above 69 */ 70 struct ipasfrag { 71 #if BYTE_ORDER == LITTLE_ENDIAN 72 u_char ip_hl:4, 73 ip_v:4; 74 #endif 75 #if BYTE_ORDER == BIG_ENDIAN 76 u_char ip_v:4, 77 ip_hl:4; 78 #endif 79 u_char ipf_mff; /* XXX overlays ip_tos: use low bit 80 * to avoid destroying tos; 81 * copied from (ip_off&IP_MF) */ 82 short ip_len; 83 u_short ip_id; 84 short ip_off; 85 u_char ip_ttl; 86 u_char ip_p; 87 u_short ip_sum; 88 struct ipasfrag *ipf_next; /* next fragment */ 89 struct ipasfrag *ipf_prev; /* previous fragment */ 90 }; 91 92 /* 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) 96 * is in m_len. 97 */ 98 #define MAX_IPOPTLEN 40 99 100 struct ipoption { 101 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 102 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 103 }; 104 105 /* 106 * Structure attached to inpcb.ip_moptions and 107 * passed to ip_output when IP multicast options are in use. 108 */ 109 struct ip_moptions { 110 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 111 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 112 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 113 u_short imo_num_memberships; /* no. memberships this socket */ 114 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 115 }; 116 117 struct ipstat { 118 u_long ips_total; /* total packets received */ 119 u_long ips_badsum; /* checksum bad */ 120 u_long ips_tooshort; /* packet too short */ 121 u_long ips_toosmall; /* not enough data */ 122 u_long ips_badhlen; /* ip header length < data size */ 123 u_long ips_badlen; /* ip length < ip header length */ 124 u_long ips_fragments; /* fragments received */ 125 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 126 u_long ips_fragtimeout; /* fragments timed out */ 127 u_long ips_forward; /* packets forwarded */ 128 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 129 u_long ips_redirectsent; /* packets forwarded on same net */ 130 u_long ips_noproto; /* unknown or unsupported protocol */ 131 u_long ips_delivered; /* datagrams delivered to upper level*/ 132 u_long ips_localout; /* total ip packets generated here */ 133 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 134 u_long ips_reassembled; /* total packets reassembled ok */ 135 u_long ips_fragmented; /* datagrams sucessfully fragmented */ 136 u_long ips_ofragments; /* output fragments created */ 137 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 138 u_long ips_badoptions; /* error in option processing */ 139 u_long ips_noroute; /* packets discarded due to no route */ 140 u_long ips_badvers; /* ip version != 4 */ 141 u_long ips_rawout; /* total raw ip packets generated */ 142 }; 143 144 #ifdef KERNEL 145 /* flags passed to ip_output as last parameter */ 146 #define IP_FORWARDING 0x1 /* most of ip header exists */ 147 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 148 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 149 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 150 151 struct ipstat ipstat; 152 struct ipq ipq; /* ip reass. queue */ 153 u_short ip_id; /* ip packet ctr, for ids */ 154 int ip_defttl; /* default IP ttl */ 155 156 int in_control __P((struct socket *, int, caddr_t, struct ifnet *)); 157 int ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **)); 158 void ip_deq __P((struct ipasfrag *)); 159 int ip_dooptions __P((struct mbuf *)); 160 void ip_drain __P((void)); 161 void ip_enq __P((struct ipasfrag *, struct ipasfrag *)); 162 void ip_forward __P((struct mbuf *, int)); 163 void ip_freef __P((struct ipq *)); 164 void ip_freemoptions __P((struct ip_moptions *)); 165 int ip_getmoptions __P((int, struct ip_moptions *, struct mbuf **)); 166 void ip_init __P((void)); 167 int ip_mforward __P((struct mbuf *, struct ifnet *)); 168 int ip_optcopy __P((struct ip *, struct ip *)); 169 int ip_output __P((struct mbuf *, 170 struct mbuf *, struct route *, int, struct ip_moptions *)); 171 int ip_pcbopts __P((struct mbuf **, struct mbuf *)); 172 struct ip * 173 ip_reass __P((struct ipasfrag *, struct ipq *)); 174 struct in_ifaddr * 175 ip_rtaddr __P((struct in_addr)); 176 int ip_setmoptions __P((int, struct ip_moptions **, struct mbuf *)); 177 void ip_slowtimo __P((void)); 178 struct mbuf * 179 ip_srcroute __P((void)); 180 void ip_stripoptions __P((struct mbuf *, struct mbuf *)); 181 int ip_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 182 void ipintr __P((void)); 183 int rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **)); 184 void rip_init __P((void)); 185 void rip_input __P((struct mbuf *)); 186 int rip_output __P((struct mbuf *, struct socket *, u_long)); 187 int rip_usrreq __P((struct socket *, 188 int, struct mbuf *, struct mbuf *, struct mbuf *)); 189 #endif 190
Indexes created Sat Sep 27 14:09:57 GMT 2025