1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _NETINET_ICMP_VAR_H_ 33 #define _NETINET_ICMP_VAR_H_ 34 35 /* 36 * Variables related to this implementation 37 * of the internet control message protocol. 38 */ 39 struct icmpstat { 40 /* statistics related to icmp packets generated */ 41 u_long icps_error; /* # of calls to icmp_error */ 42 u_long icps_oldshort; /* no error 'cuz old ip too short */ 43 u_long icps_oldicmp; /* no error 'cuz old was icmp */ 44 u_long icps_outhist[ICMP_MAXTYPE + 1]; 45 /* statistics related to input messages processed */ 46 u_long icps_badcode; /* icmp_code out of range */ 47 u_long icps_tooshort; /* packet < ICMP_MINLEN */ 48 u_long icps_checksum; /* bad checksum */ 49 u_long icps_badlen; /* calculated bound mismatch */ 50 u_long icps_reflect; /* number of responses */ 51 u_long icps_inhist[ICMP_MAXTYPE + 1]; 52 u_long icps_bmcastecho; /* b/mcast echo requests dropped */ 53 u_long icps_bmcasttstamp; /* b/mcast tstamp requests dropped */ 54 u_long icps_badaddr; /* bad return address */ 55 u_long icps_noroute; /* no route back */ 56 }; 57 58 #ifdef _KERNEL 59 #include <sys/counter.h> 60 #include <netinet/in_kdtrace.h> 61 62 VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat); 63 /* 64 * In-kernel consumers can use these accessor macros directly to update 65 * stats. 66 */ 67 #define ICMPSTAT_ADD(name, val) \ 68 do { \ 69 MIB_SDT_PROBE1(icmp, count, name, (val)); \ 70 VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val)); \ 71 } while (0) 72 73 #define ICMPSTAT_INC(name) ICMPSTAT_ADD(name, 1) 74 #define ICMPSTAT_INC2(name, type) \ 75 do { \ 76 MIB_SDT_PROBE2(icmp, count, name, 1, type); \ 77 VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name[type], 1); \ 78 } while (0) 79 80 /* 81 * Kernel module consumers must use this accessor macro. 82 */ 83 void kmod_icmpstat_inc(int statnum); 84 #define KMOD_ICMPSTAT_INC(name) \ 85 do { \ 86 MIB_SDT_PROBE1(icmp, count, name, 1); \ 87 kmod_icmpstat_inc( \ 88 offsetof(struct icmpstat, name) / sizeof(uint64_t)); \ 89 } while (0) 90 #endif 91 92 /* 93 * Identifiers for ICMP sysctl nodes 94 */ 95 #define ICMPCTL_MASKREPL 1 /* allow replies to netmask requests */ 96 #define ICMPCTL_STATS 2 /* statistics (read-only) */ 97 #define ICMPCTL_ICMPLIM 3 98 99 #ifdef _KERNEL 100 SYSCTL_DECL(_net_inet_icmp); 101 102 extern int badport_bandlim(int); 103 #define BANDLIM_UNLIMITED -1 104 #define BANDLIM_ICMP_UNREACH 0 105 #define BANDLIM_ICMP_ECHO 1 106 #define BANDLIM_ICMP_TSTAMP 2 107 #define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */ 108 #define BANDLIM_RST_OPENPORT 4 /* No connection, listener */ 109 #define BANDLIM_ICMP6_UNREACH 5 110 #define BANDLIM_SCTP_OOTB 6 111 #define BANDLIM_MAX 7 112 #endif 113 114 #endif 115