1 /* $OpenBSD: ip_ipcomp.h,v 1.10 2017/11/08 16:29:20 visa Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj@wabbitt.org) 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* IP payload compression protocol (IPComp), see RFC 2393 */ 31 32 #ifndef _NETINET_IP_IPCOMP_H_ 33 #define _NETINET_IP_IPCOMP_H_ 34 35 struct ipcompstat { 36 uint64_t ipcomps_hdrops; /* Packet shorter than header shows */ 37 uint64_t ipcomps_nopf; /* Protocol family not supported */ 38 uint64_t ipcomps_notdb; 39 uint64_t ipcomps_badkcr; 40 uint64_t ipcomps_qfull; 41 uint64_t ipcomps_noxform; 42 uint64_t ipcomps_wrap; 43 uint64_t ipcomps_input; /* Input IPcomp packets */ 44 uint64_t ipcomps_output; /* Output IPcomp packets */ 45 uint64_t ipcomps_invalid; /* Trying to use an invalid 46 * TDB */ 47 uint64_t ipcomps_ibytes; /* Input bytes */ 48 uint64_t ipcomps_obytes; /* Output bytes */ 49 uint64_t ipcomps_toobig; /* Packet got larger than 50 * IP_MAXPACKET */ 51 uint64_t ipcomps_pdrops; /* Packet blocked due to policy */ 52 uint64_t ipcomps_crypto; /* "Crypto" processing failure */ 53 uint64_t ipcomps_minlen; /* packets too short for compress */ 54 uint64_t ipcomps_outfail; /* Packet output failure */ 55 }; 56 57 /* IPCOMP header */ 58 struct ipcomp { 59 u_int8_t ipcomp_nh; /* Next header */ 60 u_int8_t ipcomp_flags; /* Flags: reserved field: 0 */ 61 u_int16_t ipcomp_cpi; /* Compression Parameter Index, 62 * Network order */ 63 }; 64 65 /* Length of IPCOMP header */ 66 #define IPCOMP_HLENGTH 4 67 68 /* 69 * Names for IPCOMP sysctl objects 70 */ 71 #define IPCOMPCTL_ENABLE 1 /* Enable COMP processing */ 72 #define IPCOMPCTL_STATS 2 /* COMP stats */ 73 #define IPCOMPCTL_MAXID 3 74 75 #define IPCOMPCTL_NAMES { \ 76 { 0, 0 }, \ 77 { "enable", CTLTYPE_INT }, \ 78 { "stats", CTLTYPE_STRUCT }, \ 79 } 80 81 #define IPCOMPCTL_VARS { \ 82 NULL, \ 83 &ipcomp_enable, \ 84 NULL \ 85 } 86 87 #ifdef _KERNEL 88 89 #include <sys/percpu.h> 90 91 enum ipcomp_counters { 92 ipcomps_hdrops, /* Packet shorter than header shows */ 93 ipcomps_nopf, /* Protocol family not supported */ 94 ipcomps_notdb, 95 ipcomps_badkcr, 96 ipcomps_qfull, 97 ipcomps_noxform, 98 ipcomps_wrap, 99 ipcomps_input, /* Input IPcomp packets */ 100 ipcomps_output, /* Output IPcomp packets */ 101 ipcomps_invalid, /* Trying to use an invalid 102 * TDB */ 103 ipcomps_ibytes, /* Input bytes */ 104 ipcomps_obytes, /* Output bytes */ 105 ipcomps_toobig, /* Packet got larger than 106 * IP_MAXPACKET */ 107 ipcomps_pdrops, /* Packet blocked due to policy */ 108 ipcomps_crypto, /* "Crypto" processing failure */ 109 ipcomps_minlen, /* packets too short for compress */ 110 ipcomps_outfail, /* Packet output failure */ 111 112 ipcomps_ncounters 113 }; 114 115 extern struct cpumem *ipcompcounters; 116 117 static inline void 118 ipcompstat_inc(enum ipcomp_counters c) 119 { 120 counters_inc(ipcompcounters, c); 121 } 122 123 static inline void 124 ipcompstat_add(enum ipcomp_counters c, uint64_t v) 125 { 126 counters_add(ipcompcounters, c, v); 127 } 128 129 extern int ipcomp_enable; 130 131 #endif /* _KERNEL */ 132 #endif /* _NETINET_IP_IPCOMP_H_ */ 133