Watt-32 tcp/ip  2.2 dev-rel.10
ip_var.h
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1 
5 /*
6  * Copyright (c) 1982, 1986, 1993
7  * The Regents of the University of California. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  * must display the following acknowledgement:
19  * This product includes software developed by the University of
20  * California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
38  * $Id: ip_var.h,v 1.24.2.2 1996/11/12 11:28:59 phk Exp $
39  */
40 
41 #ifndef __NETINET_IP_VAR_H
42 #define __NETINET_IP_VAR_H
43 
44 #include <sys/pack_on.h>
45 
46 #if defined(__TURBOC__) || defined(__BORLANDC__)
47 #pragma warn -bbf- /* "Bitfields must be signed or unsigned int" warning */
48 #endif
49 
50 /*
51  * Overlay for ip header used by other protocols (tcp, udp).
52  */
53 struct ipovly {
54  caddr_t ih_next, ih_prev; /* for protocol sequence q's */
55  u_char ih_x1; /* (unused) */
56  u_char ih_pr; /* protocol */
57  u_short ih_len; /* protocol length */
58  struct in_addr ih_src; /* source internet address */
59  struct in_addr ih_dst; /* destination internet address */
60 };
61 
62 
63 /*
64  * Ip header, when holding a fragment.
65  *
66  * Note: ipf_next must be at same offset as ipq_next above
67  */
68 struct ipasfrag {
69  u_char ip_hl:4;
70  u_char ip_v:4;
71  u_char ipf_mff; /* XXX overlays ip_tos: use low bit
72  * to avoid destroying tos;
73  * copied from (ip_off&IP_MF) */
74  u_short ip_len;
75  u_short ip_id;
76  u_short ip_off;
77  u_char ip_ttl;
78  u_char ip_p;
79  u_short ip_sum;
80  struct ipasfrag *ipf_next; /* next fragment */
81  struct ipasfrag *ipf_prev; /* previous fragment */
82 };
83 
84 #include <sys/pack_off.h>
85 
86 /*
87  * Ip reassembly queue structure. Each fragment
88  * being reassembled is attached to one of these structures.
89  * They are timed out after ipq_ttl drops to 0, and may also
90  * be reclaimed if memory becomes tight.
91  */
92 struct ipq {
93  struct ipq *next,*prev; /* to other reass headers */
94  u_char ipq_ttl; /* time for reass q to live */
95  u_char ipq_p; /* protocol of this fragment */
96  u_short ipq_id; /* sequence id for reassembly */
97  struct ipasfrag *ipq_next,*ipq_prev;
98  /* to ip headers of fragments */
99  struct in_addr ipq_src,ipq_dst;
100 #ifdef IPDIVERT
101  u_short ipq_divert; /* divert protocol port */
102 #endif
103 };
104 
105 /*
106  * Structure stored in mbuf in inpcb.ip_options
107  * and passed to ip_output when ip options are in use.
108  * The actual length of the options (including ipopt_dst)
109  * is in m_len.
110  */
111 #define MAX_IPOPTLEN 40
112 
113 struct ipoption {
114  struct in_addr ipopt_dst; /* first-hop dst if source routed */
115  char ipopt_list[MAX_IPOPTLEN]; /* options proper */
116 };
117 
118 /*
119  * Structure attached to inpcb.ip_moptions and
120  * passed to ip_output when IP multicast options are in use.
121  */
122 struct ip_moptions {
123  struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
124  u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
125  u_char imo_multicast_loop; /* 1 => hear sends if a member */
126  u_short imo_num_memberships; /* no. memberships this socket */
127  struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
128  u_long imo_multicast_vif; /* vif num outgoing multicasts */
129 };
130 
131 struct ipstat {
132  u_long ips_total; /* total packets received */
133  u_long ips_badsum; /* checksum bad */
134  u_long ips_tooshort; /* packet too short */
135  u_long ips_toosmall; /* not enough data */
136  u_long ips_badhlen; /* ip header length < data size */
137  u_long ips_badlen; /* ip length < ip header length */
138  u_long ips_fragments; /* fragments received */
139  u_long ips_fragdropped; /* frags dropped (dups, out of space) */
140  u_long ips_fragtimeout; /* fragments timed out */
141  u_long ips_forward; /* packets forwarded */
142  u_long ips_cantforward; /* packets rcvd for unreachable dest */
143  u_long ips_redirectsent; /* packets forwarded on same net */
144  u_long ips_noproto; /* unknown or unsupported protocol */
145  u_long ips_delivered; /* datagrams delivered to upper level*/
146  u_long ips_localout; /* total ip packets generated here */
147  u_long ips_odropped; /* lost out packets due to nobufs, etc. */
148  u_long ips_idropped;
149  u_long ips_reassembled; /* total packets reassembled ok */
150  u_long ips_fragmented; /* datagrams successfully fragmented */
151  u_long ips_ofragments; /* output fragments created */
152  u_long ips_cantfrag; /* don't fragment flag was set, etc. */
153  u_long ips_badoptions; /* error in option processing */
154  u_long ips_noroute; /* packets discarded due to no route */
155  u_long ips_badvers; /* ip version != 4 */
156  u_long ips_rawout; /* total raw ip packets generated */
157  u_long ips_toolong; /* ip length > max ip packet size */
158 };
159 
160 #if defined(__TURBOC__) || defined(__BORLANDC__)
161 #pragma warn -bbf.
162 #endif
163 
164 #endif
Definition: ip_var.h:92
Definition: ip_var.h:131
u_long ips_reassembled
Definition: ip_var.h:149
Definition: ip_var.h:53
Definition: in.h:146
Definition: if.h:130