/usr/share/gauche-0.9/0.9.5/lib/rfc/icmp.scm is in gauche 0.9.5-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 | ;;;
;;; rfc.icmp - Internet Control Message Protocol
;;;
;;; Copyright (c) 2007-2016 Shiro Kawai <shiro@acm.org>
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;;
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;;
;;; 3. Neither the name of the authors nor the names of its contributors
;;; may be used to endorse or promote products derived from this
;;; software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
;;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
;;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
;;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
;;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
;;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
;;; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
;; EXPERIMENTAL
;; RFC 792 Internet Control Message Protocol
;; RFC 1256 ICMP Router Discovery Messages
;; RFC 1393 Traceroute Using an IP Option
;; RFC 1788 ICMP Domain Name Messages
;; RFC 1812 Requirements for IP Version 4 Routers
;; RFC 2002 IP Mobility Supprot
;; RFC 2463 ICMPv6
;; RFC 2521 ICMP Security Failures Messages
;; Also useful:
;; http://www.iana.org/assignments/icmp-parameters
(define-module rfc.icmp
(use gauche.uvector)
(use gauche.net)
(use binary.io)
(export icmp4-message-type->string
ICMP4_ECHOREPLY ICMP4_DEST_UNREACH ICMP4_SOURCE_QUENCH
ICMP4_REDIRECT ICMP4_ECHO ICMP4_ROUTER_ADVERT ICMP4_ROUTER_SOLICIT
ICMP4_TIME_EXCEEDED ICMP4_PARAMETERPROB ICMP4_TIMESTAMP
ICMP4_TIMESTAMPREPLY ICMP4_INFO_REQUEST ICMP4_INFO_REPLY
ICMP4_ADDRESS ICMP4_ADDRESSREPLY ICMP4_TRACEROUTE
ICMP4_DGRAMCONVERROR ICMP4_DOMAIN_REQUEST ICMP4_DOMAIN_REPLY
ICMP4_SECURITYFAILURE
icmp4-unreach-code->string
ICMP4_NET_UNREACH ICMP4_HOST_UNREACH ICMP4_PROT_UNREACH
ICMP4_PORT_UNREACH ICMP4_FRAG_NEEDED ICMP4_SR_FAILED
ICMP4_NET_UNKNOWN ICMP4_HOST_UNKNOWN ICMP4_HOST_ISOLATED
ICMP4_NET_ANO ICMP4_HOST_ANO ICMP4_NET_UNR_TOS ICMP4_HOST_UNR_TOS
ICMP4_PKT_FILTERED ICMP4_PREC_VIOLATION ICMP4_PREC_CUTOFF
icmp4-redirect-code->string
ICMP4_REDIR_NET ICMP4_REDIR_HOST ICMP4_REDIR_NETTOS
ICMP4_REDIR_HOSTTOS
icmp4-router-code->string
ICMP4_ROUTER_NORMAL ICMP4_ROUTER_NOCOMMON
icmp4-exceeded-code->string
ICMP4_EXC_TTL ICMP4_EXC_FRAGTIME
icmp4-parameter-code->string
ICMP4_PARAM_PTR ICMP4_PARAM_MISSING ICMP4_PARAM_BADLENGTH
icmp4-security-code->string
ICMP4_SEC_BADSPI ICMP4_SEC_AUTHFAILED ICMP4_SEC_DECOMPFAILED
ICMP4_SEC_DECRYPTFAILED ICMP4_SEC_NEEDAUTHENTICATION
ICMP4_SEC_NEEDAUTHORIZATION
icmp6-message-type->string
ICMP6_DEST_UNREACH ICMP6_PACKET_TOO_BIG ICMP6_TIME_EXCEEDED
ICMP6_PARAMETERPROB ICMP6_ECHO ICMP6_ECHOREPLY
icmp6-unreach-code->string
ICMP6_UNREACH_NOROUTE ICMP6_UNREACH_ADMIN ICMP6_UNREACH_BEYONDSCOPE
ICMP6_UNREACH_ADDR ICMP6_UNREACH_NOPORT
icmp6-exceeded-code->string
ICMP6_EXC_TRANSIT ICMP6_EXC_REASSEMBLY
icmp6-parameter-code->string
ICMP6_PARAM_HEADER ICMP6_PARAM_NEXTHEADER ICMP6_PARAM_OPTION
icmp-fill-header!
icmp4-fill-checksum! icmp4-fill-echo!
icmp6-fill-echo!
icmp-packet-type icmp-packet-code
icmp-echo-ident icmp-echo-sequence
icmp4-describe-packet icmp6-describe-packet
))
(select-module rfc.icmp)
;;============================================================
;; Constants
;;
;; NB: it seems that these symbols in C slightly differ among the
;; underlying ICMP library, e.g. between GNU/Linux and BSD.
;; I follow the GNU convention, for it is a bit more descriptive.
(define-syntax define-named-code
(syntax-rules ()
((_ name ->string (sym val expl) ...)
(begin
(define-constant sym val) ...
(define (->string c)
(case c
((val) expl) ...
(else (format "Unknown code ~s for ~a" c name))))))))
;;-------------------------------------------------------------
;; ICMPv4
;;
;; ICMP message types.
(define-named-code "ICMP message types"
icmp4-message-type->string
(ICMP4_ECHOREPLY 0 "Echo Reply")
(ICMP4_DEST_UNREACH 3 "Destination Unreachable")
(ICMP4_SOURCE_QUENCH 4 "Source Quench ")
(ICMP4_REDIRECT 5 "Redirect (change route)")
(ICMP4_ECHO 8 "Echo Request")
(ICMP4_ROUTER_ADVERT 9 "Router Advertisement")
(ICMP4_ROUTER_SOLICIT 10 "Router solicitation")
(ICMP4_TIME_EXCEEDED 11 "Time Exceeded")
(ICMP4_PARAMETERPROB 12 "Parameter Problem")
(ICMP4_TIMESTAMP 13 "Timestamp Request")
(ICMP4_TIMESTAMPREPLY 14 "Timestamp Reply")
(ICMP4_INFO_REQUEST 15 "Information Request")
(ICMP4_INFO_REPLY 16 "Information Reply")
(ICMP4_ADDRESS 17 "Address Mask Request")
(ICMP4_ADDRESSREPLY 18 "Address Mask Reply")
(ICMP4_TRACEROUTE 30 "Traceroute")
(ICMP4_DGRAMCONVERROR 31 "Datagram Conversion Error")
(ICMP4_DOMAIN_REQUEST 37 "Domain Name Request")
(ICMP4_DOMAIN_REPLY 38 "Domain Name Reply")
(ICMP4_SECURITYFAILURE 40 "Security Failures")
)
;; Codes
(define-named-code "ICMP UNREACH codes"
icmp4-unreach-code->string
(ICMP4_NET_UNREACH 0 "Network Unreachable")
(ICMP4_HOST_UNREACH 1 "Host Unreachable")
(ICMP4_PROT_UNREACH 2 "Protocol Unreachable")
(ICMP4_PORT_UNREACH 3 "Port Unreachable")
(ICMP4_FRAG_NEEDED 4 "Fragmentation Needed/DF set")
(ICMP4_SR_FAILED 5 "Source Route failed")
(ICMP4_NET_UNKNOWN 6 "Unknown Net")
(ICMP4_HOST_UNKNOWN 7 "Unknown Host")
(ICMP4_HOST_ISOLATED 8 "Source Host Isolated")
(ICMP4_NET_ANO 9 "Dest Network Prohibited")
(ICMP4_HOST_ANO 10 "Dest Host Prohibited")
(ICMP4_NET_UNR_TOS 11 "Dest Netowork Unreachable for TOS")
(ICMP4_HOST_UNR_TOS 12 "Dest Host Unreachable for TOS")
(ICMP4_PKT_FILTERED 13 "Packet Filtered")
(ICMP4_PREC_VIOLATION 14 "Precedence Violation")
(ICMP4_PREC_CUTOFF 15 "Precedence Cut Off")
)
(define-named-code "ICMP REDIRECT codes"
icmp4-redirect-code->string
(ICMP4_REDIR_NET 0 "Redirect Net")
(ICMP4_REDIR_HOST 1 "Redirect Host")
(ICMP4_REDIR_NETTOS 2 "Redirect Net for TOS")
(ICMP4_REDIR_HOSTTOS 3 "Redirect Host for TOS")
)
(define-named-code "ICMP ROUTER ADVERTISE codes"
icmp4-router-code->string
(ICMP4_ROUTER_NORMAL 0 "Normal Router Advertisement")
(ICMP4_ROUTER_NOCOMMON 16 "Does not route common traffic")
)
(define-named-code "ICMP TIME EXCEEDED codes"
icmp4-exceeded-code->string
(ICMP4_EXC_TTL 0 "TTL count exceeded")
(ICMP4_EXC_FRAGTIME 1 "Fragment Reass time exceeded")
)
(define-named-code "ICMP PARAMETER PROBLEM codes"
icmp4-parameter-code->string
(ICMP4_PARAM_PTR 0 "Pointer indicates the error")
(ICMP4_PARAM_MISSING 1 "Missing Required Option")
(ICMP4_PARAM_BADLENGTH 2 "Bad Length")
)
(define-named-code "ICMP SECURITY FAILURE codes"
icmp4-security-code->string
(ICMP4_SEC_BADSPI 0 "Bad SPI")
(ICMP4_SEC_AUTHFAILED 1 "Authentication Failed")
(ICMP4_SEC_DECOMPFAILED 2 "Decompression Failed")
(ICMP4_SEC_DECRYPTFAILED 3 "Decryption Failed")
(ICMP4_SEC_NEEDAUTHENTICATION 4 "Need Authentication")
(ICMP4_SEC_NEEDAUTHORIZATION 5 "Need Authorization")
)
;;-------------------------------------------------------------
;; ICMPv6
;;
(define-named-code "ICMP6 message types"
icmp6-message-type->string
(ICMP6_DEST_UNREACH 1 "Destination unreachable")
(ICMP6_PACKET_TOO_BIG 2 "Packet Too Big")
(ICMP6_TIME_EXCEEDED 3 "Time Exceeded")
(ICMP6_PARAMETERPROB 4 "Parameter problem")
(ICMP6_ECHO 128 "Echo request")
(ICMP6_ECHOREPLY 129 "Echo reply")
)
(define-named-code "ICMP6 UNREACH codes"
icmp6-unreach-code->string
(ICMP6_UNREACH_NOROUTE 0 "No route to destination")
(ICMP6_UNREACH_ADMIN 1 "Communication administratively prohibited")
(ICMP6_UNREACH_BEYONDSCOPE 2 "Beyond scope of source address")
(ICMP6_UNREACH_ADDR 3 "Address unreachable")
(ICMP6_UNREACH_NOPORT 4 "Bad port")
)
(define-named-code "ICMP6 TIME EXCEEDED codes"
icmp6-exceeded-code->string
(ICMP6_EXC_TRANSIT 0 "Hop limit == 0 in transit")
(ICMP6_EXC_REASSEMBLY 1 "Reassembly time out")
)
(define-named-code "ICMP6 PARAMETER PROBLEM codes"
icmp6-parameter-code->string
(ICMP6_PARAM_HEADER 0 "Erroneous header field")
(ICMP6_PARAM_NEXTHEADER 1 "Unrecognized next header")
(ICMP6_PARAM_OPTION 2 "Unrecognized IPv6 option")
)
;;============================================================
;; Packet construction
;;
;; The low-level 'fill' routines operates on pre-allocated u8vector
;; as buffer. They don't allocate, so that they can be used
;; in inner loops.
;; Fill ICMP/ICMP6 packet header (except checksum)
(define-inline (icmp-fill-header! buf type code)
(put-u8! buf 0 type)
(put-u8! buf 1 code)
(put-u16be! buf 2 0))
(define (icmp4-fill-checksum! buf size)
(put-u16be! buf 2 (inet-checksum buf size)))
(define (icmp4-fill-echo! buf ident seq data)
(icmp-fill-header! buf ICMP4_ECHO 0)
(put-u16be! buf 4 ident)
(put-u16be! buf 6 seq)
(u8vector-copy! buf 8 data)
(icmp4-fill-checksum! buf (+ (u8vector-length data) 8)))
;; We don't need to fill out checksum fields, for the kernel calculates it.
(define (icmp6-fill-echo! buf ident seq data)
(icmp-fill-header! buf ICMP6_ECHO 0)
(put-u16be! buf 4 ident)
(put-u16be! buf 6 seq)
(u8vector-copy! buf 8 data))
;;============================================================
;; Packet decomposition
;;
;; common to v4/v6
(define (icmp-packet-type buf offset)
(get-u8 buf (+ 0 offset)))
;; common to v4/v6
(define (icmp-packet-code buf offset)
(get-u8 buf (+ 1 offset)))
;; common to v4/v6
(define (icmp-echo-ident buf offset)
(get-u16be buf (+ 4 offset)))
;; common to v4/v6
(define (icmp-echo-sequence buf offset)
(get-u16be buf (+ 6 offset)))
(define (icmp4-describe-packet buf offset)
(let ((type (icmp-packet-type buf offset))
(code (icmp-packet-code buf offset)))
(format #t "ICMP packet type=~a(~a)\n"
type (icmp4-message-type->string type))
(cond
((memv type `(,ICMP4_ECHOREPLY ,ICMP4_ECHO))
(format #t " ident=~2,'0x seq=~2,'0x\n"
(icmp-echo-ident buf offset) (icmp-echo-sequence buf offset)))
((assv type `((,ICMP4_DEST_UNREACH . ,icmp4-unreach-code->string)
(,ICMP4_REDIRECT . ,icmp4-redirect-code->string)
(,ICMP4_ROUTER_ADVERT . ,icmp4-router-code->string)
(,ICMP4_TIME_EXCEEDED . ,icmp4-exceeded-code->string)
(,ICMP4_PARAMETERPROB . ,icmp4-parameter-code->string)
(,ICMP4_SECURITYFAILURE . ,icmp4-security-code->string)))
=> (lambda (p)
(format #t " code=~a(~a)\n" code ((cdr p) code))))
)))
(define (icmp6-describe-packet buf offset)
(let ((type (icmp-packet-type buf offset))
(code (icmp-packet-code buf offset)))
(format #t "ICMPv6 packet type=~a(~a)\n"
type (icmp6-message-type->string type))
(cond
((= type ICMP6_ECHOREPLY)
(format #t " ident=~2,'0x seq=~2,'0x\n"
(icmp-echo-ident buf offset) (icmp-echo-sequence buf offset)))
((assv type `((,ICMP6_DEST_UNREACH . ,icmp6-unreach-code->string)
(,ICMP6_TIME_EXCEEDED . ,icmp6-exceeded-code->string)
(,ICMP6_PARAMETERPROB . ,icmp6-parameter-code->string)))
=> (lambda (p)
(format #t " code=~a(~a)\n" code ((cdr p) code))))
)))
|