Implement the soju.im/bouncer-networks extension
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Simon Ser
parent
61b68d6dfb
commit
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264
doc/ext/bouncer-networks.md
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264
doc/ext/bouncer-networks.md
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@ -0,0 +1,264 @@
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---
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title: Bouncer networks extension
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layout: spec
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work-in-progress: true
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copyrights:
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-
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name: "Darren Whitlen"
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period: "2020"
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email: "darren@kiwiirc.com"
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-
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name: "Simon Ser"
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period: "2021"
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email: "contact@emersion.fr"
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---
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## Notes for implementing experimental vendor extension
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This is an experimental specification for a vendored extension.
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No guarantees are made regarding the stability of this extension.
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Backwards-incompatible changes can be made at any time without prior notice.
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Software implementing this work-in-progress specification MUST NOT use the
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unprefixed `bouncer-networks` CAP names. Instead, implementations SHOULD use
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the `soju.im/bouncer-networks` CAP names to be interoperable with other software
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implementing a compatible work-in-progress version.
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## Description
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This document describes the `bouncer-networks` extension. This enables clients
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to discover servers that are bouncers, list and edit upstream networks the
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bouncer is connected to.
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Each network has a unique per-user ID called "netid". It MUST NOT change during
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the lifetime of the network. TODO: character restrictions for network IDs.
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Networks also have attributes. Attributes are encoded in the message-tag
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format. Clients MUST ignore unknown attributes.
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## Implementation
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The `bouncer-networks` extension defines a new `RPL_ISUPPORT` token and a new
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`BOUNCER` command.
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### `RPL_ISUPPORT` token
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The server can advertise a `BOUNCER_NETID` token in its `RPL_ISUPPORT` message.
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Its optional value is the network ID bound for the current connection.
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### `bouncer-networks` batch
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The `bouncer-networks` batch does not take any parameter and can only contain
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`BOUNCER NETWORK` messages.
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### `BOUNCER` command
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A new `BOUNCER` command is introduced. It has a case-insensitive subcommand:
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BOUNCER <subcommand> <params...>
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#### `BIND` subcommand
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The `BIND` subcommand selects an upstream network to bind to for the lifetime
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of the current connection. Clients can only send it after authentication but
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before the registration completes.
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BOUNCER BIND <netid>
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#### `LISTNETWORKS` subcommand
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The `LISTNETWORKS` subcommand queries the list of upstream networks.
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BOUNCER LISTNETWORKS
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The server replies with a `bouncer-networks` batch, containing any number of
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`BOUNCER NETWORK` messages:
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BOUNCER NETWORK <netid> <attributes>
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#### `ADDNETWORK` subcommand
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The `ADDNETWORK` subcommand registers a new upstream network in the bouncer.
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BOUNCER ADDNETWORK <attributes>
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The bouncer MAY reject this new network for any reason, in this case it MUST
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reply with an error. If the request is accepted, the bouncer MUST generate a
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new unique network ID. The bouncer MAY populate unspecified attributes with
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implementation-defined defaults.
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Clients MUST specify at least the `host` attribute.
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If the client doesn't specify the `tls` attribute, the server SHOULD use the
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default `1`. If the client doesn't specify the `port` attribute, the server
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SHOULD use the default `6697` if `tls=1` or `6667` if `tls=0`.
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On success, the server replies with:
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BOUNCER ADDNETWORK <netid>
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#### `CHANGENETWORK` subcommand
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The `CHANGENETWORK` subcommand changes attributes of an existing upstream
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network.
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BOUNCER CHANGENETWORK <netid> <attributes>
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The bouncer MAY reject the change for any reason, in this case it MUST reply
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with an error. At least one attribute MUST be specified by the client.
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On success, the server replies with:
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BOUNCER CHANGENETWORK <netid>
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#### `DELNETWORK` subcommand
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The `DELNETWORK` subcommand removes an existing upstream network.
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BOUNCER DELNETWORK <netid>
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The bouncer MAY reject the change for any reason, in this case it MUST reply
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with an error.
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On success, the server replies with:
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BOUNCER DELNETWORK <netid>
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### Network notifications
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When a network attributes are updated, the bouncer MUST broadcast a
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`BOUNCER NETWORK` message to all connected clients with the updated attributes:
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BOUNCER NETWORK <netid> <attributes>
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When a network is removed, the bouncer MUST broadcast a `BOUNCER NETWORK`
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message to all connected clients:
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BOUNCER NETWORK <netid> *
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### Errors
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Errors are returned using the standard replies syntax. The general syntax is:
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FAIL BOUNCER <code> <subcommand> [context...] <description>
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If a client sends an unknown subcommand, the server MUST reply with:
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FAIL BOUNCER UNKNOWN_COMMAND <subcommand> :Unknown subcommand
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#### `ACCOUNT_REQUIRED` error
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If a client sends a `BIND` subcommand before authentication, the server MAY
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reply with:
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FAIL BOUNCER ACCOUNT_REQUIRED BIND :Authentication required
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#### `REGISTRATION_IS_COMPLETED` error
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If a client sends a `BIND` subcommand after registration, the server MAY reply
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with:
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FAIL BOUNCER REGISTRATION_IS_COMPLETED BIND :Cannot bind to a network after registration
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#### `INVALID_NETID` error
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If a client sends a subcommand with an invalid network ID, the server MUST
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reply with:
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FAIL BOUNCER INVALID_NETID <subcommand> <netid> :Network not found
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#### `INVALID_ATTRIBUTE` error
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If a client sends an `ADDNETWORK` or a `CHANGENETWORK` subcommand with an
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invalid attribute, the server MUST reply with:
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FAIL BOUNCER INVALID_ATTRIBUTE <subcommand> <netid> <attribute> :Invalid attribute value
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If the `subcommand` is `ADDNETWORK`, `netid` MUST be set to the special `*`
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value.
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#### `READ_ONLY_ATTRIBUTE` error
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If a client attempts to change a read-only network attribute using the
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`ADDNETWORK` or `CHANGENETWORK` subcommand, the server MUST reply with:
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FAIL BOUNCER READ_ONLY_ATTRIBUTE <subcommand> <netid> <attribute> :Read-only attribute
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If the `subcommand` is `ADDNETWORK`, `netid` MUST be set to the special `*`
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value.
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#### `UNKNOWN_ATTRIBUTE` error
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If a client sends an `ADDNETWORK` or a `CHANGENETWORK` subcommand with an
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unknown attribute, the server MUST reply with:
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FAIL BOUNCER UNKNOWN_ATTRIBUTE <subcommand> <netid> <attribute> :Unknown attribute
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If the `subcommand` is `ADDNETWORK`, `netid` MUST be set to the special `*`
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value.
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#### `NEED_ATTRIBUTE` error
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If a client sends an `ADDNETWORK` subcommand without a mandatory attribute, the
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server MUST reply with:
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FAIL BOUNCER NEED_ATTRIBUTE ADDNETWORK <attribute> :Missing required attribute
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TODO: more errors
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### Standard network attributes
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Bouncers MUST recognise the following network attributes:
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* `name`: the human-readable name for the network.
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* `state` (read-only): one of `connected`, `connecting` or `disconnected`.
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Indicates the current state of the connection to the upstream network.
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* `host`: the hostname or literal IP address to connect to.
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* `port`: the TCP port to connect to.
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* `tls`: `1` to use a TLS connection, `0` to use a cleartext connection.
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* `nickname`: the nickname to use during registration.
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* `username`: the username to use during registration.
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* `realname`: the realname to use during registration.
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TODO: more attributes
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### Examples
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Binding to a network:
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C: CAP LS 302
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C: NICK emersion
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C: USER emersion 0 0 :Simon
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S: CAP * LS :sasl=PLAIN bouncer-networks
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C: CAP REQ :sasl bouncer-networks
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[SASL authentication]
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C: BOUNCER BIND 42
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C: CAP END
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Listing networks:
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C: BOUNCER LISTNETWORKS
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S: BATCH +asdf bouncer-networks
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S: @batch=asdf BOUNCER NETWORK 42 name=Freenode;state=connected
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S: @batch=asdf BOUNCER NETWORK 43 name=My\sAwesome\sNetwork;state=disconnected
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S: BATCH -asdf
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Adding a new network:
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C: BOUNCER ADDNETWORK name=OFTC;host=irc.oftc.net
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S: BOUNCER NETWORK 44 status=connecting
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S: BOUNCER ADDNETWORK 44
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S: BOUNCER NETWORK 44 status=connected
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Changing an existing network:
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C: BOUNCER CHANGENETWORK 44 realname=Simon
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S: BOUNCER NETWORK 44 realname=Simon
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S: BOUNCER CHANGENETWORK 44
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Removing an existing network:
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C: BOUNCER DELNETWORK 44
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S: BOUNCER NETWORK 44 *
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S: BOUNCER DELNETWORK 44
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242
downstream.go
242
downstream.go
@ -57,6 +57,17 @@ var errAuthFailed = ircError{&irc.Message{
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Params: []string{"*", "Invalid username or password"},
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}}
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func parseBouncerNetID(s string) (int64, error) {
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id, err := strconv.ParseInt(s, 10, 64)
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if err != nil {
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return 0, ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "INVALID_NETID", s, "Invalid network ID"},
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}}
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}
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return id, nil
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}
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// ' ' and ':' break the IRC message wire format, '@' and '!' break prefixes,
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// '*' and '?' break masks
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const illegalNickChars = " :@!*?"
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@ -65,6 +76,7 @@ const illegalNickChars = " :@!*?"
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// capabilities.
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var permanentDownstreamCaps = map[string]string{
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"batch": "",
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"soju.im/bouncer-networks": "",
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"cap-notify": "",
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"echo-message": "",
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"invite-notify": "",
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@ -168,12 +180,15 @@ func (dc *downstreamConn) prefix() *irc.Prefix {
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func (dc *downstreamConn) forEachNetwork(f func(*network)) {
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if dc.network != nil {
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f(dc.network)
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} else {
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} else if !dc.caps["soju.im/bouncer-networks"] {
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dc.user.forEachNetwork(f)
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}
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}
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func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
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if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
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return
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}
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dc.user.forEachUpstream(func(uc *upstreamConn) {
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if dc.network != nil && uc.network != dc.network {
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return
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@ -557,6 +572,52 @@ func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
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Params: []string{challengeStr},
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})
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}
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case "BOUNCER":
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var subcommand string
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if err := parseMessageParams(msg, &subcommand); err != nil {
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return err
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}
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switch strings.ToUpper(subcommand) {
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case "BIND":
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var idStr string
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if err := parseMessageParams(msg, nil, &idStr); err != nil {
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return err
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}
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if dc.registered {
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return ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind bouncer network after registration"},
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}}
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}
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if dc.user == nil {
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return ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
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}}
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}
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id, err := parseBouncerNetID(idStr)
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if err != nil {
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return err
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}
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var match *network
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dc.user.forEachNetwork(func(net *network) {
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if net.ID == id {
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match = net
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}
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})
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if match == nil {
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return ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
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}}
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}
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dc.networkName = match.GetName()
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}
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default:
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dc.logger.Printf("unhandled message: %v", msg)
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return newUnknownCommandError(msg.Command)
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@ -911,6 +972,10 @@ func (dc *downstreamConn) welcome() error {
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"CASEMAPPING=ascii",
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}
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if dc.network != nil {
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isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
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}
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if uc := dc.upstream(); uc != nil {
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for k := range passthroughIsupport {
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v, ok := uc.isupport[k]
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@ -1906,6 +1971,181 @@ func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
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Command: "BATCH",
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Params: []string{"-" + batchRef},
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})
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case "BOUNCER":
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var subcommand string
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if err := parseMessageParams(msg, &subcommand); err != nil {
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return err
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}
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switch strings.ToUpper(subcommand) {
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case "LISTNETWORKS":
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: "BATCH",
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Params: []string{"+networks", "bouncer-networks"},
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})
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dc.user.forEachNetwork(func(network *network) {
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id := fmt.Sprintf("%v", network.ID)
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state := "disconnected"
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if uc := network.conn; uc != nil {
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state = "connected"
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}
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attrs := irc.Tags{
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"name": irc.TagValue(network.GetName()),
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"state": irc.TagValue(state),
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}
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dc.SendMessage(&irc.Message{
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Tags: irc.Tags{"batch": irc.TagValue("networks")},
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Prefix: dc.srv.prefix(),
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Command: "BOUNCER",
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Params: []string{"NETWORK", id, attrs.String()},
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})
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})
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: "BATCH",
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Params: []string{"-networks"},
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})
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case "ADDNETWORK":
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var attrsStr string
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if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
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return err
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}
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attrs := irc.ParseTags(attrsStr)
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host, ok := attrs.GetTag("host")
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if !ok {
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return ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "NEED_ATTRIBUTE", subcommand, "host", "Missing required host attribute"},
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}}
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}
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addr := host
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if port, ok := attrs.GetTag("port"); ok {
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addr += ":" + port
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}
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if tlsStr, ok := attrs.GetTag("tls"); ok && tlsStr == "0" {
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addr = "irc+insecure://" + tlsStr
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}
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nick, ok := attrs.GetTag("nickname")
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if !ok {
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nick = dc.nick
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}
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username, _ := attrs.GetTag("username")
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realname, _ := attrs.GetTag("realname")
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// TODO: reject unknown attributes
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record := &Network{
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Addr: addr,
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Nick: nick,
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Username: username,
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Realname: realname,
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}
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network, err := dc.user.createNetwork(record)
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if err != nil {
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return ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
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}}
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}
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: "BOUNCER",
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Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
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})
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case "CHANGENETWORK":
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var idStr, attrsStr string
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if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
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return err
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}
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id, err := parseBouncerNetID(idStr)
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if err != nil {
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return err
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}
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attrs := irc.ParseTags(attrsStr)
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net := dc.user.getNetworkByID(id)
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if net == nil {
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return ircError{&irc.Message{
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Command: "FAIL",
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Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Invalid network ID"},
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}}
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}
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record := net.Network // copy network record because we'll mutate it
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for k, v := range attrs {
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s := string(v)
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switch k {
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// TODO: host, port, tls
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case "nickname":
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record.Nick = s
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case "username":
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record.Username = s
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case "realname":
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record.Realname = s
|
||||
default:
|
||||
return ircError{&irc.Message{
|
||||
Command: "FAIL",
|
||||
Params: []string{"BOUNCER", "UNKNOWN_ATTRIBUTE", subcommand, k, "Unknown attribute"},
|
||||
}}
|
||||
}
|
||||
}
|
||||
|
||||
_, err = dc.user.updateNetwork(&record)
|
||||
if err != nil {
|
||||
return ircError{&irc.Message{
|
||||
Command: "FAIL",
|
||||
Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
|
||||
}}
|
||||
}
|
||||
|
||||
dc.SendMessage(&irc.Message{
|
||||
Prefix: dc.srv.prefix(),
|
||||
Command: "BOUNCER",
|
||||
Params: []string{"CHANGENETWORK", idStr},
|
||||
})
|
||||
case "DELNETWORK":
|
||||
var idStr string
|
||||
if err := parseMessageParams(msg, nil, &idStr); err != nil {
|
||||
return err
|
||||
}
|
||||
id, err := parseBouncerNetID(idStr)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
net := dc.user.getNetworkByID(id)
|
||||
if net == nil {
|
||||
return ircError{&irc.Message{
|
||||
Command: "FAIL",
|
||||
Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Invalid network ID"},
|
||||
}}
|
||||
}
|
||||
|
||||
if err := dc.user.deleteNetwork(net.ID); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
dc.SendMessage(&irc.Message{
|
||||
Prefix: dc.srv.prefix(),
|
||||
Command: "BOUNCER",
|
||||
Params: []string{"DELNETWORK", idStr},
|
||||
})
|
||||
default:
|
||||
return ircError{&irc.Message{
|
||||
Command: "FAIL",
|
||||
Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
|
||||
}}
|
||||
}
|
||||
default:
|
||||
dc.logger.Printf("unhandled message: %v", msg)
|
||||
return newUnknownCommandError(msg.Command)
|
||||
|
||||
50
user.go
50
user.go
@ -141,6 +141,9 @@ func newNetwork(user *user, record *Network, channels []Channel) *network {
|
||||
|
||||
func (net *network) forEachDownstream(f func(*downstreamConn)) {
|
||||
net.user.forEachDownstream(func(dc *downstreamConn) {
|
||||
if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
|
||||
return
|
||||
}
|
||||
if dc.network != nil && dc.network != net {
|
||||
return
|
||||
}
|
||||
@ -511,9 +514,19 @@ func (u *user) run() {
|
||||
|
||||
uc.updateAway()
|
||||
|
||||
netIDStr := fmt.Sprintf("%v", uc.network.ID)
|
||||
uc.forEachDownstream(func(dc *downstreamConn) {
|
||||
dc.updateSupportedCaps()
|
||||
|
||||
if dc.caps["soju.im/bouncer-networks"] {
|
||||
dc.SendMessage(&irc.Message{
|
||||
Prefix: dc.srv.prefix(),
|
||||
Command: "BOUNCER",
|
||||
Params: []string{"NETWORK", netIDStr, "status=connected"},
|
||||
})
|
||||
} else {
|
||||
sendServiceNOTICE(dc, fmt.Sprintf("connected to %s", uc.network.GetName()))
|
||||
}
|
||||
|
||||
dc.updateNick()
|
||||
})
|
||||
@ -640,13 +653,24 @@ func (u *user) handleUpstreamDisconnected(uc *upstreamConn) {
|
||||
uch.updateAutoDetach(0)
|
||||
}
|
||||
|
||||
netIDStr := fmt.Sprintf("%v", uc.network.ID)
|
||||
uc.forEachDownstream(func(dc *downstreamConn) {
|
||||
dc.updateSupportedCaps()
|
||||
|
||||
if dc.caps["soju.im/bouncer-networks"] {
|
||||
dc.SendMessage(&irc.Message{
|
||||
Prefix: dc.srv.prefix(),
|
||||
Command: "BOUNCER",
|
||||
Params: []string{"NETWORK", netIDStr, "status=disconnected"},
|
||||
})
|
||||
}
|
||||
})
|
||||
|
||||
if uc.network.lastError == nil {
|
||||
uc.forEachDownstream(func(dc *downstreamConn) {
|
||||
if !dc.caps["soju.im/bouncer-networks"] {
|
||||
sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s", uc.network.GetName()))
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
@ -701,6 +725,18 @@ func (u *user) createNetwork(record *Network) (*network, error) {
|
||||
|
||||
u.addNetwork(network)
|
||||
|
||||
// TODO: broadcast network status
|
||||
idStr := fmt.Sprintf("%v", network.ID)
|
||||
u.forEachDownstream(func(dc *downstreamConn) {
|
||||
if dc.caps["soju.im/bouncer-networks"] {
|
||||
dc.SendMessage(&irc.Message{
|
||||
Prefix: dc.srv.prefix(),
|
||||
Command: "BOUNCER",
|
||||
Params: []string{"NETWORK", idStr, "network=" + network.GetName()},
|
||||
})
|
||||
}
|
||||
})
|
||||
|
||||
return network, nil
|
||||
}
|
||||
|
||||
@ -754,6 +790,8 @@ func (u *user) updateNetwork(record *Network) (*network, error) {
|
||||
// This will re-connect to the upstream server
|
||||
u.addNetwork(updatedNetwork)
|
||||
|
||||
// TODO: broadcast BOUNCER NETWORK notifications
|
||||
|
||||
return updatedNetwork, nil
|
||||
}
|
||||
|
||||
@ -768,6 +806,18 @@ func (u *user) deleteNetwork(id int64) error {
|
||||
}
|
||||
|
||||
u.removeNetwork(network)
|
||||
|
||||
idStr := fmt.Sprintf("%v", network.ID)
|
||||
u.forEachDownstream(func(dc *downstreamConn) {
|
||||
if dc.caps["soju.im/bouncer-networks"] {
|
||||
dc.SendMessage(&irc.Message{
|
||||
Prefix: dc.srv.prefix(),
|
||||
Command: "BOUNCER",
|
||||
Params: []string{"NETWORK", idStr, "*"},
|
||||
})
|
||||
}
|
||||
})
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user