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Update index.js ipv6 support #12

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Update index.js ipv6 support #12

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159 changes: 93 additions & 66 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,7 @@ module.exports = {
var ip_family = Buffer.allocUnsafe(7);
ip_family.writeUInt16BE(0x0000, 0);
ip_family.writeUInt16BE(0x0001,2);
ip_family.writeUInt8(rcinfo.protocolFamily,6);
ip_family.writeUInt8(rcinfo.ip_family,6);
ip_family.writeUInt16BE(ip_family.length,4);

var ip_proto = Buffer.allocUnsafe(7);
Expand All @@ -86,23 +86,19 @@ module.exports = {
ip_proto.writeUInt16BE(ip_proto.length,4);

/*ip*/
var d = rcinfo.srcIp ? rcinfo.srcIp.split('.') : ['127','0','0','1'];
var tmpip = ((((((+d[0])*256)+(+d[1]))*256)+(+d[2]))*256)+(+d[3]);

var src_ip4 = Buffer.allocUnsafe(10);
src_ip4.writeUInt16BE(0x0000, 0);
src_ip4.writeUInt16BE(0x0003, 2);
src_ip4.writeUInt32BE(tmpip,6);
src_ip4.writeUInt16BE(src_ip4.length,4);

d = rcinfo.dstIp ? rcinfo.dstIp.split('.') : ['127','0','0','1'];
tmpip = ((((((+d[0])*256)+(+d[1]))*256)+(+d[2]))*256)+(+d[3]);

var dst_ip4 = Buffer.allocUnsafe(10);
dst_ip4.writeUInt16BE(0x0000, 0);
dst_ip4.writeUInt16BE(0x0004, 2);
dst_ip4.writeUInt32BE(tmpip,6);
dst_ip4.writeUInt16BE(dst_ip4.length,4);
var src_ip = Buffer.allocUnsafe (rcinfo.ip_family == 10 ? 22 : 10);
src_ip.writeUInt16BE(0x0000, 0);
src_ip.writeUInt16BE(rcinfo.ip_family == 10 ? 0x0005 : 0x0003, 2);
inet_pton(rcinfo.srcIp).copy(src_ip, 6);
src_ip.writeUInt16BE(src_ip.length,4);
//console.log("BUFFER JSON SRC", src_ip.toJSON());

var dst_ip = Buffer.allocUnsafe (rcinfo.ip_family == 10 ? 22 : 10);
dst_ip.writeUInt16BE(0x0000, 0);
dst_ip.writeUInt16BE(rcinfo.ip_family == 10 ? 0x0006 : 0x0004, 2);
inet_pton(rcinfo.dstIp).copy(dst_ip, 6);
dst_ip.writeUInt16BE(dst_ip.length,4);
//console.log("BUFFER JSON DST", dst_ip.toJSON());

var src_port = Buffer.allocUnsafe(8);
var tmpA = rcinfo.srcPort ? parseInt(rcinfo.srcPort,10) : 0;
Expand Down Expand Up @@ -234,8 +230,8 @@ module.exports = {
header,
ip_family,
ip_proto,
src_ip4,
dst_ip4,
src_ip,
dst_ip,
src_port,
dst_port,
time_sec,
Expand Down Expand Up @@ -272,8 +268,8 @@ module.exports = {
header,
ip_family,
ip_proto,
src_ip4,
dst_ip4,
src_ip,
dst_ip,
src_port,
dst_port,
time_sec,
Expand Down Expand Up @@ -302,8 +298,8 @@ module.exports = {
header,
ip_family,
ip_proto,
src_ip4,
dst_ip4,
src_ip,
dst_ip,
src_port,
dst_port,
time_sec,
Expand All @@ -323,8 +319,8 @@ module.exports = {
header,
ip_family,
ip_proto,
src_ip4,
dst_ip4,
src_ip,
dst_ip,
src_port,
dst_port,
time_sec,
Expand Down Expand Up @@ -385,49 +381,80 @@ var ntohl = function (val) {
| ((val >> 24) & 0xFF);
};

var inet_pton = function inet_pton(a) {
// Very simple inet_pton(3) equivalent.
var inet_pton = function inet_pton(str) {

// IPv4.
if (str.indexOf(":") === -1) {

var buf = new Buffer(4);
buf.fill(0);

var octets = str.split(/\./g).map(function(o) {
assert(/^\d+$/.test(o), "Bad octet");
return parseInt(o, 10);
});
// Support short form from inet_aton(3) man page.
octets.forEach(function(octet) {
assert(octet >= 0, "Bad IPv4 address");
assert(octet <= 255, "Bad IPv4 address");
});
if (octets.length === 2) {
buf[0] = octets[0];
buf[3] = octets[1];
} else if (octets.length === 3) {
buf[0] = octets[0];
buf[1] = octets[1];
buf[3] = octets[2];
} else if (octets.length === 4) {
buf[0] = octets[0];
buf[1] = octets[1];
buf[2] = octets[2];
buf[3] = octets[3];
} else {
throw new Error("Bad IPv4 address");
}

var r, m, x, i, j, f = String.fromCharCode;
// IPv4
m = a.match(/^(?:\d{1,3}(?:\.|$)){4}/);
if (m) {
m = m[0].split('.');
m = f(m[0]) + f(m[1]) + f(m[2]) + f(m[3]);
// Return if 4 bytes, otherwise false.
return m.length === 4 ? m : false;
}
r = /^((?:[\da-f]{1,4}(?::|)){0,8})(::)?((?:[\da-f]{1,4}(?::|)){0,8})$/;
// IPv6
m = a.match(r);
if (m) {
// Translate each hexadecimal value.
for (j = 1; j < 4; j++) {
// Indice 2 is :: and if no length, continue.
if (j === 2 || m[j].length === 0) {
continue;
}
m[j] = m[j].split(':');
for (i = 0; i < m[j].length; i++) {
m[j][i] = parseInt(m[j][i], 16);
// Would be NaN if it was blank, return false.
if (isNaN(m[j][i])) {
// Invalid IP.
return false;
return buf;
// IPv6.
// IPv6.
} else {
var buf = new Buffer(16);
buf.fill(0);
var dgroups = str.split(/::/g);
// Check against 1::1::1
assert(dgroups.length <= 2, "Bad IPv6 address");
var groups = [];
var i;
if (dgroups[0]) {
groups.push.apply(groups, dgroups[0].split(/:/g));
}
m[j][i] = f(m[j][i] >> 8) + f(m[j][i] & 0xFF);
}
m[j] = m[j].join('');
}
x = m[1].length + m[3].length;
if (x === 16) {
return m[1] + m[3];
} else if (x < 16 && m[2].length > 0) {
return m[1] + (new Array(16 - x + 1))
.join('\x00') + m[3];
if (dgroups.length === 2) {
if (dgroups[1]) {
var splitted = dgroups[1].split(/:/g);
var fill = 8 - (groups.length + splitted.length);
// Check against 1:1:1:1::1:1:1:1
assert(fill > 0, "Bad IPv6 address");
for (i = 0; i < fill; i++) {
groups.push(0);
}
groups.push.apply(groups, splitted);
} else {
// Check against 1:1:1:1:1:1:1:1::
assert(groups.length <= 7, "Bad IPv6 address");
}
} else {
// Check against 1:1:1
assert(groups.length === 8, "Bad IPv6 address");
}
for (i = 0; i < Math.min(groups.length, 8); i++) {
// Check against parseInt("127.0.0.1", 16) -> 295
assert(/^[0-9a-f]+$/.test(groups[i]), "Bad group");
buf.writeUInt16BE(parseInt(groups[i], 16), i * 2);
}

return buf;
}
}
// Invalid IP.
return false;
};

// Build an IP packet header Parser
Expand Down