1 { Copyright (C) 2005 Bas Steendijk and Peter Green
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2 For conditions of distribution and use, see copyright notice in zlib_license.txt
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3 which is included in the package
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4 ----------------------------------------------------------------------------- }
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13 {$include lcoreconfig.inc}
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22 {$include pgtypes.inc}
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24 {$include uint32.inc}
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27 hexchars:array[0..15] of ansichar='0123456789abcdef';
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32 //redeclare these constants so units that use us can use them
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33 //without using sockets directly
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43 {$define want_Tin6_addr}
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46 {$define want_Tin6_addr}
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48 {$ifdef want_Tin6_addr}
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49 Tin6_addr = packed record
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51 0: (u6_addr8 : array[0..15] of byte);
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52 1: (u6_addr16 : array[0..7] of Word);
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53 2: (u6_addr32 : array[0..3] of uint32);
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54 3: (s6_addr8 : array[0..15] of shortint);
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55 4: (s6_addr : array[0..15] of shortint);
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56 5: (s6_addr16 : array[0..7] of smallint);
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57 6: (s6_addr32 : array[0..3] of LongInt);
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73 {zipplet 20170204: FPC 3.0.0 changed the definition of TInetSockAddr:
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74 - http://www.freepascal.org/docs-html/rtl/sockets/tinetsockaddr.html
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75 - http://www.freepascal.org/docs-html/rtl/sockets/sockaddr_in.html
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76 Due to this, TInetSockAddr -> TLInetSockAddr4 / TLInetSockAddr6
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77 Using our own types no matter what OS or compiler version will prevent future problems.
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78 Adding "4" to non IPv6 record names improves code clarity }
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81 //zipplet 20170204: Do we still need to support ver1_0? Perhaps a cleanup is in order.
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82 //For now keep supporting it for compatibility.
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90 TLInetSockAddr4 = packed Record
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94 pad :array [0..7] of byte; //zipplet 20170204 - originally this was 1..8 for some reason
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98 TLInetSockAddr6 = packed record
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101 sin6_flowinfo: uint32;
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102 sin6_addr: tin6_addr;
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103 sin6_scope_id: uint32;
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107 //zipplet 20170204: I did not rename the unioned record. We might want to rename this to TLinetSockAddrv
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108 TinetSockAddrv = packed record
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110 0: (InAddr:TLInetSockAddr4);
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112 1: (InAddr6:TLInetSockAddr6);
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115 Pinetsockaddrv = ^Tinetsockaddrv;
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118 tsockaddrin=TLInetSockAddr4;
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121 bin IP list code, by beware
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122 while this is really just a string, on the interface side it must be treated
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123 as an opaque var which is passed as "var" when it needs to be modified}
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125 tbiniplist=tbufferstring;
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127 function biniplist_new:tbiniplist;
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128 procedure biniplist_add(var l:tbiniplist;ip:tbinip);
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129 function biniplist_getcount(const l:tbiniplist):integer;
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130 function biniplist_get(const l:tbiniplist;index:integer):tbinip;
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131 procedure biniplist_set(var l:tbiniplist;index:integer;ip:tbinip);
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132 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);
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133 procedure biniplist_free(var l:tbiniplist);
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134 procedure biniplist_addlist(var l:tbiniplist;const l2:tbiniplist);
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135 function biniplist_tostr(const l:tbiniplist):thostname;
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136 function isbiniplist(const l:tbiniplist):boolean;
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138 function htons(w:word):word;
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139 function htonl(i:uint32):uint32;
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141 function ipstrtobin(const s:thostname;var binip:tbinip):boolean;
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142 function ipstrtobinf(const s:thostname):tbinip;
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143 function ipbintostr(const binip:tbinip):thostname;
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145 function ip6bintostr(const bin:tin6_addr):thostname;
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146 function ip6strtobin(const s:thostname;var bin:tin6_addr):boolean;
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149 function comparebinip(const ip1,ip2:tbinip):boolean;
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150 procedure maskbits(var binip:tbinip;bits:integer);
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151 function comparebinipmask(ip1,ip2:tbinip;bits:integer):boolean;
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153 procedure addipsoffamily(var l:tbiniplist;const l2:tbiniplist;family:integer);
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156 function longip(s:thostname):longint;
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158 function needconverttov4(const ip:tbinip):boolean;
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159 procedure converttov4(var ip:tbinip);
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160 procedure converttov6(var ip:tbinip);
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162 function inaddrvtobinip(inaddrv:tinetsockaddrv):tbinip;
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163 function makeinaddrv(addr:tbinip;port:ansistring;var inaddr:tinetsockaddrv):integer;
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164 function inaddrsize(inaddr:tinetsockaddrv):integer;
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166 function getbinipbitlength(const ip:tbinip):integer;
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167 function getipstrbitlength(const ip:thostname):integer;
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168 function getfamilybitlength(family:integer):integer;
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174 function htons(w:word):word;
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176 {$ifdef ENDIAN_LITTLE}
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177 result := ((w and $ff00) shr 8) or ((w and $ff) shl 8);
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183 function htonl(i:uint32):uint32;
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185 {$ifdef ENDIAN_LITTLE}
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186 result := (i shr 24) or (i shr 8 and $ff00) or (i shl 8 and $ff0000) or (i shl 24 and $ff000000);
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193 function inaddrvtobinip(inaddrv:tinetsockaddrv):tbinip;
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195 result.family := inaddrv.inaddr.family;
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196 if result.family = AF_INET then result.ip := inaddrv.inaddr.addr;
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198 if result.family = AF_INET6 then result.ip6 := inaddrv.inaddr6.sin6_addr;
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202 function makeinaddrv(addr:tbinip;port:ansistring;var inaddr:tinetsockaddrv):integer;
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205 { biniptemp := forwardlookup(addr,10);}
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206 fillchar(inaddr,sizeof(inaddr),0);
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207 //writeln('converted address '+addr+' to binip '+ipbintostr(biniptemp));
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208 if addr.family = AF_INET then begin
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209 inAddr.InAddr.family:=AF_INET;
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210 inAddr.InAddr.port:=htons(strtointdef(port,0));
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211 inAddr.InAddr.addr:=addr.ip;
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212 result := sizeof(tlinetsockaddr4);
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215 if addr.family = AF_INET6 then begin
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216 inAddr.InAddr6.sin6_family:=AF_INET6;
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217 inAddr.InAddr6.sin6_port:=htons(strtointdef(port,0));
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218 inAddr.InAddr6.sin6_addr:=addr.ip6;
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219 result := sizeof(tlinetsockaddr6);
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224 function inaddrsize(inaddr:tinetsockaddrv):integer;
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227 if inaddr.inaddr.family = AF_INET6 then result := sizeof(tlinetsockaddr6) else
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229 result := sizeof(tlinetsockaddr4);
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233 {converts dotted v4 IP to longint. returns host endian order}
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234 function longip(s:thostname):longint;
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238 function convertbyte(const s:ansistring):integer;
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240 result := strtointdef(s,-1);
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241 if result < 0 then begin
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245 if result > 255 then begin
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250 if (result <> 0) and (s[1] = '0') then begin
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255 if not (s[1] in ['0'..'9']) then begin
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264 if a = 0 then exit;
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265 b := convertbyte(copy(s,1,a-1));if (b < 0) then exit;
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267 s := copy(s,a+1,256);
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269 if a = 0 then exit;
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270 b := convertbyte(copy(s,1,a-1));if (b < 0) then exit;
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271 l := l or b shl 16;
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272 s := copy(s,a+1,256);
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274 if a = 0 then exit;
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275 b := convertbyte(copy(s,1,a-1));if (b < 0) then exit;
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277 s := copy(s,a+1,256);
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278 b := convertbyte(copy(s,1,256));if (b < 0) then exit;
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284 function ipstrtobinf;
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286 ipstrtobin(s,result);
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289 function ipstrtobin(const s:thostname;var binip:tbinip):boolean;
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294 if pos(':',s) <> 0 then begin
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295 {try ipv6. use builtin routine}
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296 result := ip6strtobin(s,binip.ip6);
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297 if result then binip.family := AF_INET6;
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303 // zipplet: htonl() expects a uint32 but longip() spits out longint.
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304 // Because longip() is deprecated, we do not fix it but typecast.
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305 //binip.ip := htonl(longip(s));
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306 binip.ip := htonl(uint32(longip(s)));
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307 if (binip.ip <> 0) or (s = '0.0.0.0') then begin
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309 binip.family := AF_INET;
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314 function ipbintostr(const binip:tbinip):thostname;
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320 if binip.family = AF_INET6 then begin
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321 result := ip6bintostr(binip.ip6);
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324 if binip.family = AF_INET then begin
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325 a := htonl(binip.ip);
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326 result := inttostr(a shr 24)+'.'+inttostr((a shr 16) and $ff)+'.'+inttostr((a shr 8) and $ff)+'.'+inttostr(a and $ff);
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331 {------------------------------------------------------------------------------}
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336 IPv6 address binary to/from string conversion routines
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339 - implementation does not depend on other ipv6 code such as the tin6_addr type,
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340 the parameter can also be untyped.
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341 - it is host endian neutral - binary format is always network order
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342 - it supports compression of zeroes
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343 - it supports ::ffff:192.168.12.34 style addresses
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344 - they are made to do the Right Thing, more efficient implementations are possible
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347 {fpc has hostaddrtostr6 and strtohostaddr6 but the later isnt implemented yet}
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350 function ip6bintostr(const bin:tin6_addr):thostname;
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351 {base16 with lowercase output}
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352 function makehex(w:word):ansistring;
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355 if w >= 4096 then result := result + hexchars[w shr 12];
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356 if w >= 256 then result := result + hexchars[w shr 8 and $f];
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357 if w >= 16 then result := result + hexchars[w shr 4 and $f];
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358 result := result + hexchars[w and $f];
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362 a,b,c,addrlen:integer;
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363 runbegin,runlength:integer;
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364 bytes:array[0..15] of byte absolute bin;
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365 words:array[0..7] of word;
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366 dwords:array[0..3] of integer absolute words;
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368 for a := 0 to 7 do begin
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369 words[a] := bytes[a shl 1] shl 8 or bytes[a shl 1 or 1];
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371 if (dwords[0] = 0) and (dwords[1] = 0) and (words[4] = 0) and (words[5] = $ffff) then begin
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372 {::ffff:/96 exception: v4 IP}
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377 {find longest run of zeroes}
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380 for a := 0 to addrlen-1 do begin
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381 if words[a] = 0 then begin
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383 for b := a to addrlen-1 do if words[b] = 0 then begin
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386 if (c > runlength) then begin
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393 {run length at least 2 0 words}
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394 if (runlength = 1) then begin
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400 for a := 0 to runbegin-1 do begin
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401 if (a <> 0) then result := result + ':';
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402 result := result + makehex(words[a]);
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404 if runlength > 0 then result := result + '::';
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405 c := runbegin+runlength;
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406 for a := c to addrlen-1 do begin
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407 if (a > c) then result := result + ':';
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408 result := result + makehex(words[a]);
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410 if addrlen = 6 then begin
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411 result := result + ':'+inttostr(bytes[12])+'.'+inttostr(bytes[13])+'.'+inttostr(bytes[14])+'.'+inttostr(bytes[15]);
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415 function ip6strtobin(const s:thostname;var bin:tin6_addr):boolean;
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418 fields:array[0..7] of ansistring;
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419 fieldcount:integer;
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420 emptyfield:integer;
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422 words:array[0..7] of word;
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423 bytes:array[0..15] of byte absolute bin;
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426 for a := 0 to 7 do fields[a] := '';
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428 for a := 1 to length(s) do begin
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429 if s[a] = ':' then inc(fieldcount) else fields[fieldcount] := fields[fieldcount] + s[a];
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430 if fieldcount > 7 then exit;
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432 if fieldcount < 2 then exit;
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434 {find the empty field (compressed zeroes), not counting the first and last there may be at most 1}
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436 for a := 1 to fieldcount-1 do begin
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437 if fields[a] = '' then begin
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438 if emptyfield = -1 then emptyfield := a else exit;
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442 {check if last field is a valid v4 IP}
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443 a := longip(fields[fieldcount]);
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444 if (a <> 0) or (fields[fieldcount] = '0.0.0.0') then wordcount := 6 else wordcount := 8;
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445 {0:1:2:3:4:5:6.6.6.6
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447 fillchar(words,sizeof(words),0);
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448 if wordcount = 6 then begin
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449 if fieldcount > 6 then exit;
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450 words[6] := a shr 16;
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451 words[7] := a and $ffff;
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453 if emptyfield = -1 then begin
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454 {no run length: must be an exact number of fields}
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455 if wordcount = 6 then begin
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456 if fieldcount <> 6 then exit;
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458 end else if wordcount = 8 then begin
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459 if fieldcount <> 7 then exit;
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463 for a := 0 to emptyfield do begin
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464 if fields[a] = '' then b := 0 else b := strtointdef('$'+fields[a],-1);
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465 if (b < 0) or (b > $ffff) then exit;
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468 if wordcount = 6 then dec(fieldcount);
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469 for a := wordcount-1 downto wordcount-(fieldcount-emptyfield) do begin
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470 b := a+fieldcount-wordcount+1;
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471 if fields[b] = '' then b := 0 else b := strtointdef('$'+fields[b],-1);
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472 if (b < 0) or (b > $ffff) then exit;
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475 for a := 0 to 7 do begin
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476 bytes[a shl 1] := words[a] shr 8;
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477 bytes[a shl 1 or 1] := words[a] and $ff;
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483 function comparebinip(const ip1,ip2:tbinip):boolean;
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485 if (ip1.ip <> ip2.ip) then begin
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491 if ip1.family = AF_INET6 then begin
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492 if (ip1.ip6.s6_addr32[1] <> ip2.ip6.s6_addr32[1])
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493 or (ip1.ip6.s6_addr32[2] <> ip2.ip6.s6_addr32[2])
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494 or (ip1.ip6.s6_addr32[3] <> ip2.ip6.s6_addr32[3]) then begin
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501 result := (ip1.family = ip2.family);
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504 procedure maskbits(var binip:tbinip;bits:integer);
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506 ipmax={$ifdef ipv6}15{$else}3{$endif};
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507 type tarr=array[0..ipmax] of byte;
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513 if bits = 0 then b := 0 else b := ((bits-1) div 8)+1;
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514 for a := b to ipmax do begin
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517 if (bits and 7 <> 0) then begin
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518 arr[bits shr 3] := arr[bits div 8] and not ($ff shr (bits and 7))
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522 function comparebinipmask;
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524 maskbits(ip1,bits);
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525 maskbits(ip2,bits);
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526 result := comparebinip(ip1,ip2);
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529 function needconverttov4(const ip:tbinip):boolean;
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532 if ip.family = AF_INET6 then begin
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533 if (ip.ip6.u6_addr32[0] = 0) and (ip.ip6.u6_addr32[1] = 0) and
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534 (ip.ip6.u6_addr16[4] = 0) and (ip.ip6.u6_addr16[5] = $ffff) then begin
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544 {converts a binary IP to v4 if it is a v6 IP in the v4 range}
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545 procedure converttov4(var ip:tbinip);
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548 if needconverttov4(ip) then begin
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549 ip.family := AF_INET;
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550 ip.ip := ip.ip6.s6_addr32[3];
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556 {converts a binary IP to v6 if it is a v4 IP}
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557 procedure converttov6(var ip:tbinip);
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560 if ip.family = AF_INET then begin
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561 ip.family := AF_INET6;
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562 ip.ip6.s6_addr32[3] := ip.ip;
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563 ip.ip6.u6_addr32[0] := 0;
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564 ip.ip6.u6_addr32[1] := 0;
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565 ip.ip6.u6_addr16[4] := 0;
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566 ip.ip6.u6_addr16[5] := $ffff;
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572 {-----------biniplist stuff--------------------------------------------------}
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575 biniplist_prefix: ansistring = 'bipl'#0;
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576 //fpc 1.0.x doesn't seem to like use of length function in a constant
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578 //biniplist_prefixlen=length(biniplist_prefix);
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580 biniplist_prefixlen=5;
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582 function biniplist_new:tbiniplist;
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584 result := biniplist_prefix;
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587 procedure biniplist_add(var l:tbiniplist;ip:tbinip);
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591 a := biniplist_getcount(l);
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592 biniplist_setcount(l,a+1);
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593 biniplist_set(l,a,ip);
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596 function biniplist_getcount(const l:tbiniplist):integer;
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598 result := (length(l)-biniplist_prefixlen) div sizeof(tbinip);
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601 function biniplist_get(const l:tbiniplist;index:integer):tbinip;
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603 if (index >= biniplist_getcount(l)) then begin
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604 fillchar(result,sizeof(result),0);
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607 move(l[index*sizeof(tbinip)+1+biniplist_prefixlen],result,sizeof(result));
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610 procedure biniplist_set(var l:tbiniplist;index:integer;ip:tbinip);
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613 move(ip,l[index*sizeof(tbinip)+1+biniplist_prefixlen],sizeof(ip));
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616 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);
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618 setlength(l,(sizeof(tbinip)*newlen)+biniplist_prefixlen);
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621 procedure biniplist_free(var l:tbiniplist);
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626 procedure biniplist_addlist;
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628 l := l + copy(l2,biniplist_prefixlen+1,maxlongint);
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631 function biniplist_tostr(const l:tbiniplist):thostname;
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636 for a := 0 to biniplist_getcount(l)-1 do begin
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637 if result <> '(' then result := result + ', ';
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638 result := result + ipbintostr(biniplist_get(l,a));
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640 result := result + ')';
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643 function isbiniplist(const l:tbiniplist):boolean;
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647 for i := 1 to biniplist_prefixlen do begin
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648 if biniplist_prefix[i] <> l[i] then begin
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656 procedure addipsoffamily(var l:tbiniplist;const l2:tbiniplist;family:integer);
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661 for a := biniplist_getcount(l2)-1 downto 0 do begin
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662 biniptemp := biniplist_get(l2,a);
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663 if (biniptemp.family = family) then biniplist_add(l,biniptemp);
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667 function getfamilybitlength(family:integer):integer;
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670 if family = AF_INET6 then result := 128 else
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672 if family = AF_INET then result := 32
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676 function getbinipbitlength(const ip:tbinip):integer;
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678 result := getfamilybitlength(ip.family);
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681 function getipstrbitlength(const ip:thostname):integer;
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685 ipstrtobin(ip,biniptemp);
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686 result := getbinipbitlength(biniptemp);
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