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Frank John Begornia
2025-12-23 01:51:15 +08:00
commit c926590e1d
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167
node_modules/netmask/lib/netmask.coffee generated vendored Normal file
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long2ip = (long) ->
a = (long & (0xff << 24)) >>> 24;
b = (long & (0xff << 16)) >>> 16;
c = (long & (0xff << 8)) >>> 8;
d = long & 0xff;
return [a, b, c, d].join('.')
ip2long = (ip) ->
b = []
for i in [0..3]
if ip.length == 0
break
if i > 0
if ip[0] != '.'
throw new Error('Invalid IP')
ip = ip.substring(1)
[n, c] = atob(ip)
ip = ip.substring(c)
b.push(n)
if ip.length != 0
throw new Error('Invalid IP')
switch b.length
when 1
# Long input notation
if b[0] > 0xFFFFFFFF
throw new Error('Invalid IP')
return b[0] >>> 0
when 2
# Class A notation
if b[0] > 0xFF or b[1] > 0xFFFFFF
throw new Error('Invalid IP')
return (b[0] << 24 | b[1]) >>> 0
when 3
# Class B notation
if b[0] > 0xFF or b[1] > 0xFF or b[2] > 0xFFFF
throw new Error('Invalid IP')
return (b[0] << 24 | b[1] << 16 | b[2]) >>> 0
when 4
# Dotted quad notation
if b[0] > 0xFF or b[1] > 0xFF or b[2] > 0xFF or b[3] > 0xFF
throw new Error('Invalid IP')
return (b[0] << 24 | b[1] << 16 | b[2] << 8 | b[3]) >>> 0
else
throw new Error('Invalid IP')
chr = (b) ->
return b.charCodeAt(0)
chr0 = chr('0')
chra = chr('a')
chrA = chr('A')
atob = (s) ->
n = 0
base = 10
dmax = '9'
i = 0
if s.length > 1 and s[i] == '0'
if s[i+1] == 'x' or s[i+1] == 'X'
i += 2
base = 16
else if '0' <= s[i+1] and s[i+1] <= '9'
i++
base = 8
dmax = '7'
start = i
while i < s.length
if '0' <= s[i] and s[i] <= dmax
n = (n*base + (chr(s[i])-chr0)) >>> 0
else if base == 16
if 'a' <= s[i] and s[i] <= 'f'
n = (n*base + (10+chr(s[i])-chra)) >>> 0
else if 'A' <= s[i] and s[i] <= 'F'
n = (n*base + (10+chr(s[i])-chrA)) >>> 0
else
break
else
break
if n > 0xFFFFFFFF
throw new Error('too large')
i++
if i == start
throw new Error('empty octet')
return [n, i]
class Netmask
constructor: (net, mask) ->
throw new Error("Missing `net' parameter") unless typeof net is 'string'
unless mask
# try to find the mask in the net (i.e.: 1.2.3.4/24 or 1.2.3.4/255.255.255.0)
[net, mask] = net.split('/', 2)
unless mask
mask = 32
if typeof mask is 'string' and mask.indexOf('.') > -1
# Compute bitmask, the netmask as a number of bits in the network portion of the address for this block (eg.: 24)
try
@maskLong = ip2long(mask)
catch error
throw new Error("Invalid mask: #{mask}")
for i in [32..0]
if @maskLong == (0xffffffff << (32 - i)) >>> 0
@bitmask = i
break
else if mask or mask == 0
# The mask was passed as bitmask, compute the mask as long from it
@bitmask = parseInt(mask, 10)
@maskLong = 0
if @bitmask > 0
@maskLong = (0xffffffff << (32 - @bitmask)) >>> 0
else
throw new Error("Invalid mask: empty")
try
@netLong = (ip2long(net) & @maskLong) >>> 0
catch error
throw new Error("Invalid net address: #{net}")
throw new Error("Invalid mask for ip4: #{mask}") unless @bitmask <= 32
# The number of IP address in the block (eg.: 254)
@size = Math.pow(2, 32 - @bitmask)
# The address of the network block as a string (eg.: 216.240.32.0)
@base = long2ip(@netLong)
# The netmask as a string (eg.: 255.255.255.0)
@mask = long2ip(@maskLong)
# The host mask, the opposite of the netmask (eg.: 0.0.0.255)
@hostmask = long2ip(~@maskLong)
# The first usable address of the block
@first = if @bitmask <= 30 then long2ip(@netLong + 1) else @base
# The last usable address of the block
@last = if @bitmask <= 30 then long2ip(@netLong + @size - 2) else long2ip(@netLong + @size - 1)
# The block's broadcast address: the last address of the block (eg.: 192.168.1.255)
@broadcast = if @bitmask <= 30 then long2ip(@netLong + @size - 1)
# Returns true if the given ip or netmask is contained in the block
contains: (ip) ->
if typeof ip is 'string' and (ip.indexOf('/') > 0 or ip.split('.').length isnt 4)
ip = new Netmask(ip)
if ip instanceof Netmask
return @contains(ip.base) and @contains((ip.broadcast || ip.last))
else
return (ip2long(ip) & @maskLong) >>> 0 == ((@netLong & @maskLong)) >>> 0
# Returns the Netmask object for the block which follow this one
next: (count=1) ->
return new Netmask(long2ip(@netLong + (@size * count)), @mask)
forEach: (fn) ->
# this implementation is not idiomatic but avoids large memory allocations (2 arrays, one for range and one for the results) in cases when then netmask is large
long = ip2long(@first)
lastLong = ip2long(@last)
index = 0
while long <= lastLong
fn long2ip(long), long, index
index++
long++
return
# Returns the complete netmask formatted as `base/bitmask`
toString: ->
return @base + "/" + @bitmask
exports.ip2long = ip2long
exports.long2ip = long2ip
exports.Netmask = Netmask

208
node_modules/netmask/lib/netmask.js generated vendored Normal file
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// Generated by CoffeeScript 1.12.7
(function() {
var Netmask, atob, chr, chr0, chrA, chra, ip2long, long2ip;
long2ip = function(long) {
var a, b, c, d;
a = (long & (0xff << 24)) >>> 24;
b = (long & (0xff << 16)) >>> 16;
c = (long & (0xff << 8)) >>> 8;
d = long & 0xff;
return [a, b, c, d].join('.');
};
ip2long = function(ip) {
var b, c, i, j, n, ref;
b = [];
for (i = j = 0; j <= 3; i = ++j) {
if (ip.length === 0) {
break;
}
if (i > 0) {
if (ip[0] !== '.') {
throw new Error('Invalid IP');
}
ip = ip.substring(1);
}
ref = atob(ip), n = ref[0], c = ref[1];
ip = ip.substring(c);
b.push(n);
}
if (ip.length !== 0) {
throw new Error('Invalid IP');
}
switch (b.length) {
case 1:
if (b[0] > 0xFFFFFFFF) {
throw new Error('Invalid IP');
}
return b[0] >>> 0;
case 2:
if (b[0] > 0xFF || b[1] > 0xFFFFFF) {
throw new Error('Invalid IP');
}
return (b[0] << 24 | b[1]) >>> 0;
case 3:
if (b[0] > 0xFF || b[1] > 0xFF || b[2] > 0xFFFF) {
throw new Error('Invalid IP');
}
return (b[0] << 24 | b[1] << 16 | b[2]) >>> 0;
case 4:
if (b[0] > 0xFF || b[1] > 0xFF || b[2] > 0xFF || b[3] > 0xFF) {
throw new Error('Invalid IP');
}
return (b[0] << 24 | b[1] << 16 | b[2] << 8 | b[3]) >>> 0;
default:
throw new Error('Invalid IP');
}
};
chr = function(b) {
return b.charCodeAt(0);
};
chr0 = chr('0');
chra = chr('a');
chrA = chr('A');
atob = function(s) {
var base, dmax, i, n, start;
n = 0;
base = 10;
dmax = '9';
i = 0;
if (s.length > 1 && s[i] === '0') {
if (s[i + 1] === 'x' || s[i + 1] === 'X') {
i += 2;
base = 16;
} else if ('0' <= s[i + 1] && s[i + 1] <= '9') {
i++;
base = 8;
dmax = '7';
}
}
start = i;
while (i < s.length) {
if ('0' <= s[i] && s[i] <= dmax) {
n = (n * base + (chr(s[i]) - chr0)) >>> 0;
} else if (base === 16) {
if ('a' <= s[i] && s[i] <= 'f') {
n = (n * base + (10 + chr(s[i]) - chra)) >>> 0;
} else if ('A' <= s[i] && s[i] <= 'F') {
n = (n * base + (10 + chr(s[i]) - chrA)) >>> 0;
} else {
break;
}
} else {
break;
}
if (n > 0xFFFFFFFF) {
throw new Error('too large');
}
i++;
}
if (i === start) {
throw new Error('empty octet');
}
return [n, i];
};
Netmask = (function() {
function Netmask(net, mask) {
var error, i, j, ref;
if (typeof net !== 'string') {
throw new Error("Missing `net' parameter");
}
if (!mask) {
ref = net.split('/', 2), net = ref[0], mask = ref[1];
}
if (!mask) {
mask = 32;
}
if (typeof mask === 'string' && mask.indexOf('.') > -1) {
try {
this.maskLong = ip2long(mask);
} catch (error1) {
error = error1;
throw new Error("Invalid mask: " + mask);
}
for (i = j = 32; j >= 0; i = --j) {
if (this.maskLong === (0xffffffff << (32 - i)) >>> 0) {
this.bitmask = i;
break;
}
}
} else if (mask || mask === 0) {
this.bitmask = parseInt(mask, 10);
this.maskLong = 0;
if (this.bitmask > 0) {
this.maskLong = (0xffffffff << (32 - this.bitmask)) >>> 0;
}
} else {
throw new Error("Invalid mask: empty");
}
try {
this.netLong = (ip2long(net) & this.maskLong) >>> 0;
} catch (error1) {
error = error1;
throw new Error("Invalid net address: " + net);
}
if (!(this.bitmask <= 32)) {
throw new Error("Invalid mask for ip4: " + mask);
}
this.size = Math.pow(2, 32 - this.bitmask);
this.base = long2ip(this.netLong);
this.mask = long2ip(this.maskLong);
this.hostmask = long2ip(~this.maskLong);
this.first = this.bitmask <= 30 ? long2ip(this.netLong + 1) : this.base;
this.last = this.bitmask <= 30 ? long2ip(this.netLong + this.size - 2) : long2ip(this.netLong + this.size - 1);
this.broadcast = this.bitmask <= 30 ? long2ip(this.netLong + this.size - 1) : void 0;
}
Netmask.prototype.contains = function(ip) {
if (typeof ip === 'string' && (ip.indexOf('/') > 0 || ip.split('.').length !== 4)) {
ip = new Netmask(ip);
}
if (ip instanceof Netmask) {
return this.contains(ip.base) && this.contains(ip.broadcast || ip.last);
} else {
return (ip2long(ip) & this.maskLong) >>> 0 === (this.netLong & this.maskLong) >>> 0;
}
};
Netmask.prototype.next = function(count) {
if (count == null) {
count = 1;
}
return new Netmask(long2ip(this.netLong + (this.size * count)), this.mask);
};
Netmask.prototype.forEach = function(fn) {
var index, lastLong, long;
long = ip2long(this.first);
lastLong = ip2long(this.last);
index = 0;
while (long <= lastLong) {
fn(long2ip(long), long, index);
index++;
long++;
}
};
Netmask.prototype.toString = function() {
return this.base + "/" + this.bitmask;
};
return Netmask;
})();
exports.ip2long = ip2long;
exports.long2ip = long2ip;
exports.Netmask = Netmask;
}).call(this);