1 /* 2 * Copyright (c) 1997-2001 by Sun Microsystems, Inc. 3 * All rights reserved. 4 */ 5 6 /* 7 * Copyright (c) 1982, 1986 Regents of the University of California. 8 * All rights reserved. The Berkeley software License Agreement 9 * specifies the terms and conditions for redistribution. 10 */ 11 12 /* 13 * Overlay for ip header used by other protocols (tcp, udp). 14 */ 15 16 #ifndef _NETINET_IP_VAR_H 17 #define _NETINET_IP_VAR_H 18 19 #pragma ident "%Z%%M% %I% %E% SMI" 20 /* ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86 */ 21 22 #include <sys/isa_defs.h> 23 24 #ifdef __cplusplus 25 extern "C" { 26 #endif 27 28 struct ipovly { 29 #ifdef _LP64 30 uint32_t ih_next, ih_prev; 31 #else 32 caddr_t ih_next, ih_prev; /* for protocol sequence q's */ 33 #endif 34 uchar_t ih_x1; /* (unused) */ 35 uchar_t ih_pr; /* protocol */ 36 short ih_len; /* protocol length */ 37 struct in_addr ih_src; /* source internet address */ 38 struct in_addr ih_dst; /* destination internet address */ 39 }; 40 41 /* 42 * Ip reassembly queue structure. Each fragment 43 * being reassembled is attached to one of these structures. 44 * They are timed out after ipq_ttl drops to 0, and may also 45 * be reclaimed if memory becomes tight. 46 */ 47 struct ipq { 48 struct ipq *next, *prev; /* to other reass headers */ 49 uchar_t ipq_ttl; /* time for reass q to live */ 50 uchar_t ipq_p; /* protocol of this fragment */ 51 ushort_t ipq_id; /* sequence id for reassembly */ 52 struct ipasfrag *ipq_next, *ipq_prev; 53 /* to ip headers of fragments */ 54 struct in_addr ipq_src, ipq_dst; 55 }; 56 57 /* 58 * Ip header, when holding a fragment. 59 * 60 * Note: ipf_next must be at same offset as ipq_next above 61 */ 62 struct ipasfrag { 63 #ifdef _BIT_FIELDS_LTOH 64 uchar_t ip_hl:4, 65 ip_v:4; 66 #else 67 uchar_t ip_v:4, 68 ip_hl:4; 69 #endif 70 uchar_t ipf_mff; /* copied from (ip_off&IP_MF) */ 71 short ip_len; 72 ushort_t ip_id; 73 short ip_off; 74 uchar_t ip_ttl; 75 uchar_t ip_p; 76 ushort_t ip_sum; 77 struct ipasfrag *ipf_next; /* next fragment */ 78 struct ipasfrag *ipf_prev; /* previous fragment */ 79 }; 80 81 /* 82 * Structure stored in mbuf in inpcb.ip_options 83 * and passed to ip_output when ip options are in use. 84 * The actual length of the options (including ipopt_dst) 85 * is in m_len. 86 */ 87 #define MAX_IPOPTLEN 40 88 89 struct ipoption { 90 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 91 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 92 }; 93 94 struct ipstat { 95 long ips_total; /* total packets received */ 96 long ips_badsum; /* checksum bad */ 97 long ips_tooshort; /* packet too short */ 98 long ips_toosmall; /* not enough data */ 99 long ips_badhlen; /* ip header length < data size */ 100 long ips_badlen; /* ip length < ip header length */ 101 long ips_fragments; /* fragments received */ 102 long ips_fragdropped; /* frags dropped (dups, out of space) */ 103 long ips_fragtimeout; /* fragments timed out */ 104 long ips_forward; /* packets forwarded */ 105 long ips_cantforward; /* packets rcvd for unreachable dest */ 106 long ips_redirectsent; /* packets forwarded on same net */ 107 }; 108 109 #ifdef _KERNEL 110 /* flags passed to ip_output as last parameter */ 111 #define IP_FORWARDING 0x1 /* most of ip header exists */ 112 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 113 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 114 #endif 115 116 #ifdef __cplusplus 117 } 118 #endif 119 120 #endif /* _NETINET_IP_VAR_H */ 121