Package net.i2p.router
Class Blocklist
- java.lang.Object
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- net.i2p.router.Blocklist
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public class Blocklist extends Object
Manage blocking by IP address, in a manner similar to the Banlist, which blocks by router hash. We also try to keep the two lists in sync: if a router at a given IP is blocked, we will also banlist it "forever" (until the next reboot). While the reverse case (blocking the IP of a router banlisted forever) is not automatic, the transports will call add() below to block the IP, which allows the transports to terminate an inbound connection before the router ident handshake. And the on-disk blocklist can also contain router hashes to be banlisted. So, this class maintains three separate lists:1) The list of IP ranges, read in from a file at startup 2) The list of hashes, read in from the same file 3) A list of single IPs, initially empty, added to as needed
Read in the IP blocklist from a file, store it in-memory as efficiently as we can, and perform tests against it as requested. When queried for a peer that is blocklisted but isn't banlisted, banlist it forever, then go back to the file to get the original entry so we can add the reason to the banlist text. On-disk blocklist supports IPv4 only. In-memory supports both IPv4 and IPv6.
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Constructor Summary
Constructors Constructor Description Blocklist(RouterContext context)
Router MUST call startup()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
add(byte[] ip)
Maintain a simple in-memory single-IP blocklist This is used for new additions, NOT for the main list of IP ranges read in from the file.void
add(String ip)
Maintain a simple in-memory single-IP blocklist This is used for new additions, NOT for the main list of IP ranges read in from the file.void
disable()
boolean
isBlocklisted(byte[] ip)
calling this externally won't banlist the peer, this is just an IP checkboolean
isBlocklisted(String ip)
calling this externally won't banlist the peer, this is just an IP checkboolean
isBlocklisted(Hash peer)
Does the peer's IP address appear in the blocklist? If so, and it isn't banlisted, banlist it forever...boolean
isBlocklisted(RouterInfo pinfo)
Does the peer's IP address appear in the blocklist? If so, and it isn't banlisted, banlist it forever...void
remove(byte[] ip)
Remove from the in-memory single-IP blocklist.void
renderStatusHTML(Writer out)
Write directly to the stream so we don't OOM on a huge list.void
startup()
Loads the following files in-order: $I2P/blocklist.txt ~/.i2p/blocklist.txt ~/.i2p/docs/feed/blocklist/blocklist.txt File if specified with router.blocklist.file
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Constructor Detail
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Blocklist
public Blocklist(RouterContext context)
Router MUST call startup()
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Method Detail
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startup
public void startup()
Loads the following files in-order: $I2P/blocklist.txt ~/.i2p/blocklist.txt ~/.i2p/docs/feed/blocklist/blocklist.txt File if specified with router.blocklist.file
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disable
public void disable()
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add
public void add(String ip)
Maintain a simple in-memory single-IP blocklist This is used for new additions, NOT for the main list of IP ranges read in from the file.- Parameters:
ip
- IPv4 or IPv6
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add
public void add(byte[] ip)
Maintain a simple in-memory single-IP blocklist This is used for new additions, NOT for the main list of IP ranges read in from the file.- Parameters:
ip
- IPv4 or IPv6
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remove
public void remove(byte[] ip)
Remove from the in-memory single-IP blocklist. This is only works to undo add()s, NOT for the main list of IP ranges read in from the file.- Parameters:
ip
- IPv4 or IPv6- Since:
- 0.9.28
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isBlocklisted
public boolean isBlocklisted(Hash peer)
Does the peer's IP address appear in the blocklist? If so, and it isn't banlisted, banlist it forever...
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isBlocklisted
public boolean isBlocklisted(RouterInfo pinfo)
Does the peer's IP address appear in the blocklist? If so, and it isn't banlisted, banlist it forever...- Since:
- 0.9.29
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isBlocklisted
public boolean isBlocklisted(String ip)
calling this externally won't banlist the peer, this is just an IP check- Parameters:
ip
- IPv4 or IPv6
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isBlocklisted
public boolean isBlocklisted(byte[] ip)
calling this externally won't banlist the peer, this is just an IP check- Parameters:
ip
- IPv4 or IPv6
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renderStatusHTML
public void renderStatusHTML(Writer out) throws IOException
Write directly to the stream so we don't OOM on a huge list. Go through each list twice since we store out-of-order. TODO move to routerconsole, but that would require exposing the _blocklist array.- Throws:
IOException
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