| /* |
| * Copyright (c) 1982, 1986, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 |
| */ |
| |
| #include <endian.h> |
| |
| /* |
| * Overlay for ip header used by other protocols (tcp, udp). |
| */ |
| struct ipovly { |
| caddr_t ih_next, ih_prev; /* for protocol sequence q's */ |
| u_char ih_x1; /* (unused) */ |
| u_char ih_pr; /* protocol */ |
| short ih_len; /* protocol length */ |
| struct in_addr ih_src; /* source internet address */ |
| struct in_addr ih_dst; /* destination internet address */ |
| } __attribute__ ((packed)); |
| |
| /* |
| * Ip reassembly queue structure. Each fragment |
| * being reassembled is attached to one of these structures. |
| * They are timed out after ipq_ttl drops to 0, and may also |
| * be reclaimed if memory becomes tight. |
| */ |
| struct ipq { |
| struct ipq *next,*prev; /* to other reass headers */ |
| u_char ipq_ttl; /* time for reass q to live */ |
| u_char ipq_p; /* protocol of this fragment */ |
| u_short ipq_id; /* sequence id for reassembly */ |
| struct ipasfrag *ipq_next,*ipq_prev; |
| /* to ip headers of fragments */ |
| struct in_addr ipq_src,ipq_dst; |
| } __attribute__ ((packed)); |
| |
| /* |
| * Ip header, when holding a fragment. |
| * |
| * Note: ipf_next must be at same offset as ipq_next above |
| */ |
| struct ipasfrag { |
| #if BYTE_ORDER == LITTLE_ENDIAN |
| u_char ip_hl:4, |
| ip_v:4; |
| #endif |
| #if BYTE_ORDER == BIG_ENDIAN |
| u_char ip_v:4, |
| ip_hl:4; |
| #endif |
| u_char ipf_mff; /* XXX overlays ip_tos: use low bit |
| * to avoid destroying tos; |
| * copied from (ip_off&IP_MF) */ |
| short ip_len; |
| u_short ip_id; |
| short ip_off; |
| u_char ip_ttl; |
| u_char ip_p; |
| u_short ip_sum; |
| struct ipasfrag *ipf_next; /* next fragment */ |
| struct ipasfrag *ipf_prev; /* previous fragment */ |
| } __attribute__ ((packed)); |
| |
| /* |
| * Structure stored in mbuf in inpcb.ip_options |
| * and passed to ip_output when ip options are in use. |
| * The actual length of the options (including ipopt_dst) |
| * is in m_len. |
| */ |
| #define MAX_IPOPTLEN 40 |
| |
| struct ipoption { |
| struct in_addr ipopt_dst; /* first-hop dst if source routed */ |
| char ipopt_list[MAX_IPOPTLEN]; /* options proper */ |
| }; |
| |
| struct ipstat { |
| n_long ips_total; /* total packets received */ |
| n_long ips_badsum; /* checksum bad */ |
| n_long ips_tooshort; /* packet too short */ |
| n_long ips_toosmall; /* not enough data */ |
| n_long ips_badhlen; /* ip header length < data size */ |
| n_long ips_badlen; /* ip length < ip header length */ |
| n_long ips_fragments; /* fragments received */ |
| n_long ips_fragdropped; /* frags dropped (dups, out of space) */ |
| n_long ips_fragtimeout; /* fragments timed out */ |
| n_long ips_forward; /* packets forwarded */ |
| n_long ips_cantforward; /* packets rcvd for unreachable dest */ |
| n_long ips_redirectsent; /* packets forwarded on same net */ |
| n_long ips_noproto; /* unknown or unsupported protocol */ |
| n_long ips_delivered; /* datagrams delivered to upper level*/ |
| n_long ips_localout; /* total ip packets generated here */ |
| n_long ips_odropped; /* lost packets due to nobufs, etc. */ |
| n_long ips_reassembled; /* total packets reassembled ok */ |
| n_long ips_fragmented; /* datagrams sucessfully fragmented */ |
| n_long ips_ofragments; /* output fragments created */ |
| n_long ips_cantfrag; /* don't fragment flag was set, etc. */ |
| n_long ips_badoptions; /* error in option processing */ |
| n_long ips_noroute; /* packets discarded due to no route */ |
| n_long ips_badvers; /* ip version != 4 */ |
| n_long ips_rawout; /* total raw ip packets generated */ |
| }; |
| |
| #ifdef KERNEL |
| /* flags passed to ip_output as last parameter */ |
| #define IP_FORWARDING 0x1 /* most of ip header exists */ |
| #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ |
| #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ |
| #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ |
| |
| struct ipstat ipstat; |
| struct ipq ipq; /* ip reass. queue */ |
| u_short ip_id; /* ip packet ctr, for ids */ |
| int ip_defttl; /* default IP ttl */ |
| |
| int in_control (struct socket *, n_long, caddr_t, struct ifnet *); |
| int ip_ctloutput (int, struct socket *, int, int, struct mbuf **); |
| void ip_deq (struct ipasfrag *); |
| int ip_dooptions (struct mbuf *); |
| void ip_drain (void); |
| void ip_enq (struct ipasfrag *, struct ipasfrag *); |
| void ip_forward (struct mbuf *, int); |
| void ip_freef (struct ipq *); |
| void ip_freemoptions (struct ip_moptions *); |
| int ip_getmoptions (int, struct ip_moptions *, struct mbuf **); |
| void ip_init (void); |
| int ip_mforward (struct mbuf *, struct ifnet *); |
| int ip_optcopy (struct ip *, struct ip *); |
| int ip_output (struct mbuf *, |
| struct mbuf *, struct route *, int, struct ip_moptions *); |
| int ip_pcbopts (struct mbuf **, struct mbuf *); |
| struct ip * |
| ip_reass (struct ipasfrag *, struct ipq *); |
| struct in_ifaddr * |
| ip_rtaddr (struct in_addr); |
| int ip_setmoptions (int, struct ip_moptions **, struct mbuf *); |
| void ip_slowtimo (void); |
| struct mbuf * |
| ip_srcroute (void); |
| void ip_stripoptions (struct mbuf *, struct mbuf *); |
| int ip_sysctl (int *, n_long, void *, size_t *, void *, size_t); |
| void ipintr (void); |
| int rip_ctloutput (int, struct socket *, int, int, struct mbuf **); |
| void rip_init (void); |
| void rip_input (struct mbuf *); |
| int rip_output (struct mbuf *, struct socket *, n_long); |
| int rip_usrreq (struct socket *, |
| int, struct mbuf *, struct mbuf *, struct mbuf *); |
| #endif |