source: rtems/cpukit/libnetworking/netinet/ip_var.h @ 954e959

4.104.114.84.95
Last change on this file since 954e959 was 954e959, checked in by Ralf Corsepius <ralf.corsepius@…>, on 05/12/05 at 03:42:44

Define BYTE_PACK.
  • Property mode set to 100644
File size: 8.1 KB
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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 *      @(#)ip_var.h    8.2 (Berkeley) 1/9/95
34 *      $Id$
35 */
36
37#ifndef _NETINET_IP_VAR_H_
38#define _NETINET_IP_VAR_H_
39
40#ifndef BYTE_PACK
41#define BYTE_PACK __attribute__((packed))
42#endif
43
44/*
45 * Overlay for ip header used by other protocols (tcp, udp).
46 */
47struct ipovly {
48        caddr_t ih_next BYTE_PACK;
49        caddr_t ih_prev BYTE_PACK;      /* for protocol sequence q's */
50        u_char  ih_x1;                  /* (unused) */
51        u_char  ih_pr;                  /* protocol */
52        u_short ih_len BYTE_PACK;               /* protocol length */
53        struct  in_addr ih_src;         /* source internet address */
54        struct  in_addr ih_dst;         /* destination internet address */
55};
56
57/*
58 * Ip reassembly queue structure.  Each fragment
59 * being reassembled is attached to one of these structures.
60 * They are timed out after ipq_ttl drops to 0, and may also
61 * be reclaimed if memory becomes tight.
62 */
63struct ipq {
64        struct  ipq *next,*prev;        /* to other reass headers */
65        u_char  ipq_ttl;                /* time for reass q to live */
66        u_char  ipq_p;                  /* protocol of this fragment */
67        u_short ipq_id BYTE_PACK;       /* sequence id for reassembly */
68        struct  ipasfrag *ipq_next,*ipq_prev;
69                                        /* to ip headers of fragments */
70        struct  in_addr ipq_src,ipq_dst;
71#ifdef IPDIVERT
72        u_short ipq_divert BYTE_PACK;   /* divert protocol port */
73#endif
74};
75
76/*
77 * Ip header, when holding a fragment.
78 *
79 * Note: ipf_next must be at same offset as ipq_next above
80 */
81struct  ipasfrag {
82#if BYTE_ORDER == LITTLE_ENDIAN
83        u_char  ip_hl:4,
84                ip_v:4;
85#endif
86#if BYTE_ORDER == BIG_ENDIAN
87        u_char  ip_v:4,
88                ip_hl:4;
89#endif
90        u_char  ipf_mff;                /* XXX overlays ip_tos: use low bit
91                                         * to avoid destroying tos;
92                                         * copied from (ip_off&IP_MF) */
93        u_short ip_len BYTE_PACK;
94        u_short ip_id BYTE_PACK;
95        u_short ip_off BYTE_PACK;
96        u_char  ip_ttl;
97        u_char  ip_p;
98        u_short ip_sum BYTE_PACK;
99        struct  ipasfrag *ipf_next;     /* next fragment */
100        struct  ipasfrag *ipf_prev;     /* previous fragment */
101};
102
103/*
104 * Structure stored in mbuf in inpcb.ip_options
105 * and passed to ip_output when ip options are in use.
106 * The actual length of the options (including ipopt_dst)
107 * is in m_len.
108 */
109#define MAX_IPOPTLEN    40
110
111struct ipoption {
112        struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
113        char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
114};
115
116/*
117 * Structure attached to inpcb.ip_moptions and
118 * passed to ip_output when IP multicast options are in use.
119 */
120struct ip_moptions {
121        struct  ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
122        u_char  imo_multicast_ttl;      /* TTL for outgoing multicasts */
123        u_char  imo_multicast_loop;     /* 1 => hear sends if a member */
124        u_short imo_num_memberships;    /* no. memberships this socket */
125        struct  in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
126        u_long  imo_multicast_vif;      /* vif num outgoing multicasts */
127};
128
129struct  ipstat {
130        u_long  ips_total;              /* total packets received */
131        u_long  ips_badsum;             /* checksum bad */
132        u_long  ips_tooshort;           /* packet too short */
133        u_long  ips_toosmall;           /* not enough data */
134        u_long  ips_badhlen;            /* ip header length < data size */
135        u_long  ips_badlen;             /* ip length < ip header length */
136        u_long  ips_fragments;          /* fragments received */
137        u_long  ips_fragdropped;        /* frags dropped (dups, out of space) */
138        u_long  ips_fragtimeout;        /* fragments timed out */
139        u_long  ips_forward;            /* packets forwarded */
140        u_long  ips_cantforward;        /* packets rcvd for unreachable dest */
141        u_long  ips_redirectsent;       /* packets forwarded on same net */
142        u_long  ips_noproto;            /* unknown or unsupported protocol */
143        u_long  ips_delivered;          /* datagrams delivered to upper level*/
144        u_long  ips_localout;           /* total ip packets generated here */
145        u_long  ips_odropped;           /* lost packets due to nobufs, etc. */
146        u_long  ips_reassembled;        /* total packets reassembled ok */
147        u_long  ips_fragmented;         /* datagrams successfully fragmented */
148        u_long  ips_ofragments;         /* output fragments created */
149        u_long  ips_cantfrag;           /* don't fragment flag was set, etc. */
150        u_long  ips_badoptions;         /* error in option processing */
151        u_long  ips_noroute;            /* packets discarded due to no route */
152        u_long  ips_badvers;            /* ip version != 4 */
153        u_long  ips_rawout;             /* total raw ip packets generated */
154        u_long  ips_toolong;            /* ip length > max ip packet size */
155};
156
157#ifdef _KERNEL
158/* flags passed to ip_output as last parameter */
159#define IP_FORWARDING           0x1             /* most of ip header exists */
160#define IP_RAWOUTPUT            0x2             /* raw ip header exists */
161#define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
162#define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
163
164struct inpcb;
165struct route;
166
167extern struct   ipstat  ipstat;
168extern u_short  ip_id;                          /* ip packet ctr, for ids */
169extern int      ip_defttl;                      /* default IP ttl */
170extern u_char   ip_protox[];
171extern struct socket *ip_rsvpd; /* reservation protocol daemon */
172extern struct socket *ip_mrouter; /* multicast routing daemon */
173extern int      (*legal_vif_num) __P((int));
174extern u_long   (*ip_mcast_src) __P((int));
175extern int rsvp_on;
176
177int      ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
178void     ip_drain __P((void));
179void     ip_freemoptions __P((struct ip_moptions *));
180void     ip_init __P((void));
181extern int       (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *,
182                          struct ip_moptions *));
183int      ip_output __P((struct mbuf *,
184            struct mbuf *, struct route *, int, struct ip_moptions *));
185void     ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
186                struct mbuf *));
187void     ip_slowtimo __P((void));
188struct mbuf *
189         ip_srcroute __P((void));
190void     ip_stripoptions __P((struct mbuf *, struct mbuf *));
191int      rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
192void     rip_init __P((void));
193void     rip_input __P((struct mbuf *, int));
194int      rip_output __P((struct mbuf *, struct socket *, u_long));
195int      rip_usrreq __P((struct socket *,
196            int, struct mbuf *, struct mbuf *, struct mbuf *));
197void    ipip_input __P((struct mbuf *, int));
198void    rsvp_input __P((struct mbuf *, int));
199int     ip_rsvp_init __P((struct socket *));
200int     ip_rsvp_done __P((void));
201int     ip_rsvp_vif_init __P((struct socket *, struct mbuf *));
202int     ip_rsvp_vif_done __P((struct socket *, struct mbuf *));
203void    ip_rsvp_force_done __P((struct socket *));
204
205#ifdef IPDIVERT
206void    div_init __P((void));
207void    div_input __P((struct mbuf *, int));
208int     div_usrreq __P((struct socket *,
209                int, struct mbuf *, struct mbuf *, struct mbuf *));
210extern u_short ip_divert_port;
211extern u_short ip_divert_ignore;
212#endif /* IPDIVERT */
213
214#endif /* _KERNEL */
215
216#endif /* _NETINET_IP_VAR_H_ */
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