Commit | Line | Data |
---|---|---|
8ae0e4b4 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
2b6b6284 | 3 | * All rights reserved. |
8ae0e4b4 | 4 | * |
dbf0c423 | 5 | * %sccs.include.redist.c% |
2b6b6284 | 6 | * |
d6fa15c2 | 7 | * @(#)ip_var.h 7.8 (Berkeley) %G% |
8ae0e4b4 | 8 | */ |
77e50f35 BJ |
9 | |
10 | /* | |
11 | * Overlay for ip header used by other protocols (tcp, udp). | |
12 | */ | |
13 | struct ipovly { | |
eb44bfb2 BJ |
14 | caddr_t ih_next, ih_prev; /* for protocol sequence q's */ |
15 | u_char ih_x1; /* (unused) */ | |
16 | u_char ih_pr; /* protocol */ | |
2b4b57cd BJ |
17 | short ih_len; /* protocol length */ |
18 | struct in_addr ih_src; /* source internet address */ | |
19 | struct in_addr ih_dst; /* destination internet address */ | |
77e50f35 BJ |
20 | }; |
21 | ||
22 | /* | |
23 | * Ip reassembly queue structure. Each fragment | |
24 | * being reassembled is attached to one of these structures. | |
25 | * They are timed out after ipq_ttl drops to 0, and may also | |
26 | * be reclaimed if memory becomes tight. | |
27 | */ | |
28 | struct ipq { | |
29 | struct ipq *next,*prev; /* to other reass headers */ | |
30 | u_char ipq_ttl; /* time for reass q to live */ | |
31 | u_char ipq_p; /* protocol of this fragment */ | |
32 | u_short ipq_id; /* sequence id for reassembly */ | |
33 | struct ipasfrag *ipq_next,*ipq_prev; | |
34 | /* to ip headers of fragments */ | |
2b4b57cd | 35 | struct in_addr ipq_src,ipq_dst; |
77e50f35 BJ |
36 | }; |
37 | ||
38 | /* | |
39 | * Ip header, when holding a fragment. | |
af8f6a21 SL |
40 | * |
41 | * Note: ipf_next must be at same offset as ipq_next above | |
77e50f35 BJ |
42 | */ |
43 | struct ipasfrag { | |
f8b9a4f5 | 44 | #if BYTE_ORDER == LITTLE_ENDIAN |
77e50f35 BJ |
45 | u_char ip_hl:4, |
46 | ip_v:4; | |
f112c673 | 47 | #endif |
f8b9a4f5 | 48 | #if BYTE_ORDER == BIG_ENDIAN |
f112c673 MK |
49 | u_char ip_v:4, |
50 | ip_hl:4; | |
498aff44 | 51 | #endif |
77e50f35 BJ |
52 | u_char ipf_mff; /* copied from (ip_off&IP_MF) */ |
53 | short ip_len; | |
54 | u_short ip_id; | |
55 | short ip_off; | |
56 | u_char ip_ttl; | |
57 | u_char ip_p; | |
58 | u_short ip_sum; | |
eb44bfb2 BJ |
59 | struct ipasfrag *ipf_next; /* next fragment */ |
60 | struct ipasfrag *ipf_prev; /* previous fragment */ | |
77e50f35 BJ |
61 | }; |
62 | ||
8b2d0afb MK |
63 | /* |
64 | * Structure stored in mbuf in inpcb.ip_options | |
65 | * and passed to ip_output when ip options are in use. | |
66 | * The actual length of the options (including ipopt_dst) | |
67 | * is in m_len. | |
68 | */ | |
69 | #define MAX_IPOPTLEN 40 | |
70 | ||
71 | struct ipoption { | |
72 | struct in_addr ipopt_dst; /* first-hop dst if source routed */ | |
73 | char ipopt_list[MAX_IPOPTLEN]; /* options proper */ | |
74 | }; | |
75 | ||
d6fa15c2 KS |
76 | /* |
77 | * Structure attached to inpcb.ip_moptions and | |
78 | * passed to ip_output when IP multicast options are in use. | |
79 | */ | |
80 | struct ip_moptions { | |
81 | struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ | |
82 | u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ | |
83 | u_char imo_multicast_loop; /* 1 => hear sends if a member */ | |
84 | u_short imo_num_memberships; /* no. memberships this socket */ | |
85 | struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; | |
86 | }; | |
87 | ||
2b4b57cd | 88 | struct ipstat { |
8b2d0afb MK |
89 | long ips_total; /* total packets received */ |
90 | long ips_badsum; /* checksum bad */ | |
91 | long ips_tooshort; /* packet too short */ | |
92 | long ips_toosmall; /* not enough data */ | |
93 | long ips_badhlen; /* ip header length < data size */ | |
94 | long ips_badlen; /* ip length < ip header length */ | |
95 | long ips_fragments; /* fragments received */ | |
96 | long ips_fragdropped; /* frags dropped (dups, out of space) */ | |
97 | long ips_fragtimeout; /* fragments timed out */ | |
3f22f2b1 MK |
98 | long ips_forward; /* packets forwarded */ |
99 | long ips_cantforward; /* packets rcvd for unreachable dest */ | |
8b2d0afb | 100 | long ips_redirectsent; /* packets forwarded on same net */ |
ea9a9897 KS |
101 | long ips_noproto; /* unknown or unsupported protocol */ |
102 | long ips_delivered; /* packets consumed here */ | |
103 | long ips_localout; /* total ip packets generated here */ | |
104 | long ips_odropped; /* lost packets due to nobufs, etc. */ | |
105 | long ips_reassembled; /* total packets reassembled ok */ | |
106 | long ips_fragmented; /* output packets fragmented ok */ | |
107 | long ips_ofragments; /* output fragments created */ | |
108 | long ips_cantfrag; /* don't fragment flag was set, etc. */ | |
2b4b57cd BJ |
109 | }; |
110 | ||
77e50f35 | 111 | #ifdef KERNEL |
0e3f761f | 112 | /* flags passed to ip_output as last parameter */ |
8f45cd54 MK |
113 | #define IP_FORWARDING 0x1 /* most of ip header exists */ |
114 | #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ | |
115 | #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ | |
0e3f761f | 116 | |
2b4b57cd | 117 | struct ipstat ipstat; |
77e50f35 | 118 | struct ipq ipq; /* ip reass. queue */ |
77e50f35 | 119 | u_short ip_id; /* ip packet ctr, for ids */ |
8b2d0afb MK |
120 | |
121 | struct mbuf *ip_srcroute(); | |
77e50f35 | 122 | #endif |