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