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Annotation of XNU/bsd/netinet/ip_var.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1982, 1986, 1993
        !            24:  *     The Regents of the University of California.  All rights reserved.
        !            25:  *
        !            26:  * Redistribution and use in source and binary forms, with or without
        !            27:  * modification, are permitted provided that the following conditions
        !            28:  * are met:
        !            29:  * 1. Redistributions of source code must retain the above copyright
        !            30:  *    notice, this list of conditions and the following disclaimer.
        !            31:  * 2. Redistributions in binary form must reproduce the above copyright
        !            32:  *    notice, this list of conditions and the following disclaimer in the
        !            33:  *    documentation and/or other materials provided with the distribution.
        !            34:  * 3. All advertising materials mentioning features or use of this software
        !            35:  *    must display the following acknowledgement:
        !            36:  *     This product includes software developed by the University of
        !            37:  *     California, Berkeley and its contributors.
        !            38:  * 4. Neither the name of the University nor the names of its contributors
        !            39:  *    may be used to endorse or promote products derived from this software
        !            40:  *    without specific prior written permission.
        !            41:  *
        !            42:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            43:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            44:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            45:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            46:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            47:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            48:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            49:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            50:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            51:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            52:  * SUCH DAMAGE.
        !            53:  *
        !            54:  *     @(#)ip_var.h    8.2 (Berkeley) 1/9/95
        !            55:  */
        !            56: 
        !            57: #ifndef _NETINET_IP_VAR_H_
        !            58: #define        _NETINET_IP_VAR_H_
        !            59: 
        !            60: /*
        !            61:  * Overlay for ip header used by other protocols (tcp, udp).
        !            62:  */
        !            63: struct ipovly {
        !            64:        u_char  ih_x1[9];               /* (unused) */
        !            65:        u_char  ih_pr;                  /* protocol */
        !            66:        u_short ih_len;                 /* protocol length */
        !            67:        struct  in_addr ih_src;         /* source internet address */
        !            68:        struct  in_addr ih_dst;         /* destination internet address */
        !            69: };
        !            70: 
        !            71: /*
        !            72:  * Ip reassembly queue structure.  Each fragment
        !            73:  * being reassembled is attached to one of these structures.
        !            74:  * They are timed out after ipq_ttl drops to 0, and may also
        !            75:  * be reclaimed if memory becomes tight.
        !            76:  */
        !            77: struct ipq {
        !            78:        struct  ipq *next,*prev;        /* to other reass headers */
        !            79:        u_char  ipq_ttl;                /* time for reass q to live */
        !            80:        u_char  ipq_p;                  /* protocol of this fragment */
        !            81:        u_short ipq_id;                 /* sequence id for reassembly */
        !            82:        struct mbuf *ipq_frags;         /* to ip headers of fragments */
        !            83:        struct  in_addr ipq_src,ipq_dst;
        !            84: #if IPDIVERT
        !            85:        u_short ipq_divert;             /* divert protocol port */
        !            86:        u_short ipq_div_cookie;         /* divert protocol cookie */
        !            87: #endif
        !            88: };
        !            89: 
        !            90: /*
        !            91:  * Structure stored in mbuf in inpcb.ip_options
        !            92:  * and passed to ip_output when ip options are in use.
        !            93:  * The actual length of the options (including ipopt_dst)
        !            94:  * is in m_len.
        !            95:  */
        !            96: #define MAX_IPOPTLEN   40
        !            97: 
        !            98: struct ipoption {
        !            99:        struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
        !           100:        char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
        !           101: };
        !           102: 
        !           103: /*
        !           104:  * Structure attached to inpcb.ip_moptions and
        !           105:  * passed to ip_output when IP multicast options are in use.
        !           106:  */
        !           107: struct ip_moptions {
        !           108:        struct  ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
        !           109:        u_char  imo_multicast_ttl;      /* TTL for outgoing multicasts */
        !           110:        u_char  imo_multicast_loop;     /* 1 => hear sends if a member */
        !           111:        u_short imo_num_memberships;    /* no. memberships this socket */
        !           112:        struct  in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
        !           113:        u_long  imo_multicast_vif;      /* vif num outgoing multicasts */
        !           114: };
        !           115: 
        !           116: struct ipstat {
        !           117:        u_long  ips_total;              /* total packets received */
        !           118:        u_long  ips_badsum;             /* checksum bad */
        !           119:        u_long  ips_tooshort;           /* packet too short */
        !           120:        u_long  ips_toosmall;           /* not enough data */
        !           121:        u_long  ips_badhlen;            /* ip header length < data size */
        !           122:        u_long  ips_badlen;             /* ip length < ip header length */
        !           123:        u_long  ips_fragments;          /* fragments received */
        !           124:        u_long  ips_fragdropped;        /* frags dropped (dups, out of space) */
        !           125:        u_long  ips_fragtimeout;        /* fragments timed out */
        !           126:        u_long  ips_forward;            /* packets forwarded */
        !           127:        u_long  ips_fastforward;        /* packets fast 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 successfully 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:        u_long  ips_toolong;            /* ip length > max ip packet size */
        !           143:        u_long  ips_notmember;          /* multicasts for unregistered grps */
        !           144: };
        !           145: 
        !           146: #if KERNEL
        !           147: 
        !           148: /* flags passed to ip_output as last parameter */
        !           149: #define        IP_FORWARDING           0x1             /* most of ip header exists */
        !           150: #define        IP_RAWOUTPUT            0x2             /* raw ip header exists */
        !           151: #define        IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
        !           152: #define        IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
        !           153: 
        !           154: struct ip;
        !           155: struct inpcb;
        !           156: struct route;
        !           157: struct sockopt;
        !           158: 
        !           159: extern struct  ipstat  ipstat;
        !           160: extern u_short ip_id;                          /* ip packet ctr, for ids */
        !           161: extern int     ip_defttl;                      /* default IP ttl */
        !           162: extern int     ipforwarding;                   /* ip forwarding */
        !           163: extern struct protosw *ip_protox[];
        !           164: extern struct socket *ip_rsvpd;        /* reservation protocol daemon */
        !           165: extern struct socket *ip_mrouter; /* multicast routing daemon */
        !           166: extern int     (*legal_vif_num) __P((int));
        !           167: extern u_long  (*ip_mcast_src) __P((int));
        !           168: extern int rsvp_on;
        !           169: extern struct  pr_usrreqs rip_usrreqs;
        !           170: 
        !           171: int     ip_ctloutput __P((struct socket *, struct sockopt *sopt));
        !           172: void    ip_drain __P((void));
        !           173: void    ip_freemoptions __P((struct ip_moptions *));
        !           174: void    ip_init __P((void));
        !           175: extern int      (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *,
        !           176:                          struct ip_moptions *));
        !           177: int     ip_output __P((struct mbuf *,
        !           178:            struct mbuf *, struct route *, int, struct ip_moptions *));
        !           179: void    ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
        !           180:                struct mbuf *));
        !           181: void    ip_slowtimo __P((void));
        !           182: struct mbuf *
        !           183:         ip_srcroute __P((void));
        !           184: void    ip_stripoptions __P((struct mbuf *, struct mbuf *));
        !           185: int     rip_ctloutput __P((struct socket *, struct sockopt *));
        !           186: void    rip_ctlinput __P((int, struct sockaddr *, void *));
        !           187: void    rip_init __P((void));
        !           188: void    rip_input __P((struct mbuf *, int));
        !           189: int     rip_output __P((struct mbuf *, struct socket *, u_long));
        !           190: void   ipip_input __P((struct mbuf *, int));
        !           191: void   rsvp_input __P((struct mbuf *, int));
        !           192: int    ip_rsvp_init __P((struct socket *));
        !           193: int    ip_rsvp_done __P((void));
        !           194: int    ip_rsvp_vif_init __P((struct socket *, struct sockopt *));
        !           195: int    ip_rsvp_vif_done __P((struct socket *, struct sockopt *));
        !           196: void   ip_rsvp_force_done __P((struct socket *));
        !           197: 
        !           198: #if IPDIVERT
        !           199: void   div_init __P((void));
        !           200: void   div_input __P((struct mbuf *, int));
        !           201: extern struct pr_usrreqs div_usrreqs;
        !           202: extern u_short ip_divert_port;
        !           203: extern u_short ip_divert_cookie;
        !           204: #endif
        !           205: 
        !           206: extern struct sockaddr_in *ip_fw_fwd_addr;
        !           207: 
        !           208: #endif /* KERNEL */
        !           209: 
        !           210: #endif /* !_NETINET_IP_VAR_H_ */

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