I2P_Developers/i2p.itoopie
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2005-11-26 Raccoon23

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* Added support for 'dynamic keys' mode, where the router creates a new
      router identity whenever it detects a substantial change in its public
      address (read: SSU IP or port).  This only offers minimal additional
      protection against trivial attackers, but should provide functional
      improvement for people who have periodic IP changes, since their new
      router address would not be shitlisted while their old one would be.
    * Added further infrastructure for restricted route operation, but its use
      is not recommended.
This commit is contained in:
jrandom
2005-11-26 09:16:11 +00:00
committed by zzz
parent ef82cc4f20
commit 9089fdd2d5
23 changed files with 319 additions and 27 deletions
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51
core/java/src/net/i2p/data/RouterInfo.java
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@ -51,6 +51,8 @@ public class RouterInfo extends DataStructureImpl {
public static final String PROP_NETWORK_ID = "netId";
public static final String PROP_CAPABILITIES = "caps";
public static final char CAPABILITY_HIDDEN = 'H';
public RouterInfo() {
setIdentity(null);
@ -250,12 +252,21 @@ public class RouterInfo extends DataStructureImpl {
try {
_identity.writeBytes(out);
DataHelper.writeDate(out, new Date(_published));
DataHelper.writeLong(out, 1, _addresses.size());
List addresses = DataHelper.sortStructures(_addresses);
for (Iterator iter = addresses.iterator(); iter.hasNext();) {
RouterAddress addr = (RouterAddress) iter.next();
addr.writeBytes(out);
if (isHidden()) {
// Do not send IP address to peers in hidden mode
DataHelper.writeLong(out, 1, 0);
} else {
DataHelper.writeLong(out, 1, _addresses.size());
List addresses = DataHelper.sortStructures(_addresses);
for (Iterator iter = addresses.iterator(); iter.hasNext();) {
RouterAddress addr = (RouterAddress) iter.next();
addr.writeBytes(out);
}
}
// XXX: what about peers?
// answer: they're always empty... they're a placeholder for one particular
// method of trusted links, which isn't implemented in the router
// at the moment, and may not be later.
DataHelper.writeLong(out, 1, _peers.size());
List peers = DataHelper.sortStructures(_peers);
for (Iterator iter = peers.iterator(); iter.hasNext();) {
@ -315,7 +326,14 @@ public class RouterInfo extends DataStructureImpl {
else
return "";
}
/**
* Is this a hidden node?
*/
public boolean isHidden() {
return (getCapabilities().indexOf(CAPABILITY_HIDDEN) != -1);
}
public void addCapability(char cap) {
if (_options == null) _options = new OrderedProperties();
synchronized (_options) {
@ -326,6 +344,25 @@ public class RouterInfo extends DataStructureImpl {
_options.setProperty(PROP_CAPABILITIES, caps + cap);
}
}
public void delCapability(char cap) {
if (_options == null) return;
synchronized (_options) {
String caps = _options.getProperty(PROP_CAPABILITIES);
int idx;
if (caps == null) {
return;
} else if ((idx = caps.indexOf(cap)) == -1) {
return;
} else {
StringBuffer buf = new StringBuffer(caps);
while ( (idx = buf.indexOf(""+cap)) != -1)
buf.deleteCharAt(idx);
_options.setProperty(PROP_CAPABILITIES, buf.toString());
}
}
}
/**
* Get the routing key for the structure using the current modifier in the RoutingKeyGenerator.
@ -516,4 +553,4 @@ public class RouterInfo extends DataStructureImpl {
_stringified = buf.toString();
return _stringified;
}
}
}