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ipcd with new libipc API (v 0.7)

master
Karchnu 2020-11-03 16:18:52 +01:00
parent 9912ef8a5e
commit 53ed216132
2 changed files with 96 additions and 103 deletions
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195
src/ipcd.cr
View File

@ -1,15 +1,30 @@
require "baguette-crystal-base"
require "./rules" require "./rules"
require "./plumberdcliparser" require "./ipcd_cli_parser"
require "ipc" require "ipc"
require "uri" require "uri"
class IPC::NetworkD < IPC::Service Baguette::Context.verbosity = 4
# The client asks to plumberd to open a connection to a service class IPCd::Service < IPC::Server
@rules = RuleSet.new
@redirections = RedirectionSet.new
def parse_cli (argv : Array(String))
IPCdCLIParser.parse_rules argv, @rules, @redirections
end
def to_s(io : IO)
io << "ipcd\n"
io << @rules.to_s + "\n" + @redirections.to_s
end
# The client asks to ipcd to open a connection to a service
# the service name is used unless there is a redirection that is provided to the client through # the service name is used unless there is a redirection that is provided to the client through
# a IPC_NETWORK environment variable # a IPC_NETWORK environment variable
# This environment variable is sent from the client to plumberd, that's what is parsed here # This environment variable is sent from the client to ipcd, that's what is parsed here
# parse_lookup_payload extract the right service URI to use from the IPC_NETWORK content # parse_lookup_payload extract the right service URI to use from the IPC_NETWORK content
# sent by the client in the form: # sent by the client in the form:
@ -36,14 +51,14 @@ class IPC::NetworkD < IPC::Service
next next
end end
puts "service: #{service} redirection uri: #{newuri}" Baguette::Log.debug "service: #{service} redirection uri: #{newuri}"
uri = URI.parse newuri uri = URI.parse newuri
services_redirections[service] = uri services_redirections[service] = uri
end end
end end
services_redirections.each do |k, v| services_redirections.each do |k, v|
puts "\033[36mpossible redirection (from env. var.):\033[00m service: #{k} uri: #{v}" Baguette::Log.debug "possible redirection (from env. var.): service: #{k} uri: #{v}"
if k == requested_service_name if k == requested_service_name
requested_service = v requested_service = v
end end
@ -53,128 +68,106 @@ class IPC::NetworkD < IPC::Service
end end
# XXX: WIP # XXX: WIP
def service_lookup (message : IPC::Message, origin : IPC::Connection) def service_lookup (message : IPC::Message, fd : Int32)
payload = String.new message.payload payload = String.new message.payload
requested_service = IPC::NetworkD.parse_lookup_payload payload requested_service = IPCd::Service.parse_lookup_payload payload
# TODO: connect to the service then provide the file descriptor to the client scheme = requested_service.scheme
begin if scheme.nil?
scheme = requested_service.scheme raise "no SCHEME in redirection"
if scheme.nil? end
raise "no SCHEME in redirection"
end
service_name = scheme service_name = scheme
if scheme == "unix" if scheme == "unix"
# scheme == unix => simple redirection # scheme == unix => simple redirection
# the URI is "unix:///service" so the path is "/service" # the URI is "unix:///service" so the path is "/service"
# first, remove its slash prefix # first, remove its slash prefix
service_name = requested_service.path.lchop service_name = requested_service.path.lchop
end end
puts "service name: #{service_name}" Baguette::Log.info "service name: #{service_name}"
service = IPC::Connection.new service_name service = IPC::Client.new service_name
service_fd = service.fd.not_nil!
# TODO: for remote services, we have to connect to communication service # TODO: for remote services, we have to connect to communication service
# these communication services need an URI to work on # these communication services need an URI to work on
# The protocol: # The protocol:
# plumberd sends an URI to the communication service, which responds with a "OK" message # ipcd sends an URI to the communication service, which responds with a "OK" message
if scheme != "unix" if scheme != "unix"
service.send 1.to_u8, "#{requested_service.to_s}\n" service.send service_fd, 1.to_u8, "#{requested_service.to_s}\n"
response = service.read response = service.read
payload = String.new response.payload payload = String.new response.payload
if payload.chomp != "OK" if payload.chomp != "OK"
raise "service #{service_name} response was #{payload.chomp}" raise "service #{service_name} response was #{payload.chomp}"
end
end
# Then we provide the file descriptor to the client
r = LibIPC.ipc_provide_fd(origin.fd, service.fd)
if r.error_code != 0
m = String.new r.error_message
raise Exception.new "cannot send the file descriptor of the requested service: #{m}"
end
# finally, the service should be closed in plumberd
service.close
rescue e
puts "\033[31mException during the connection to the requested service #{requested_service}: #{e}\033[00m"
# when a problem occurs, close the client connection
begin
# LibIPC.ipc_connections_print pointerof(@connections)
remove_fd origin.fd
origin.close
rescue ex
puts "\033[31mException during a client removal: #{ex}\033[00m"
end end
end end
end
def wait_event(server : IPC::Connection?, &block) : Tuple(LibIPC::EventType, IPC::Message, IPC::Connection) # Then we provide the file descriptor to the client
event = LibIPC::Event.new r = LibIPC.ipc_provide_fd(fd, service_fd)
# TODO: plumberd should be able to transfer messages???
r = LibIPC.ipc_wait_event self.pointer, @service_info.pointer, pointerof(event), pointerof(@timer)
if r.error_code != 0 if r.error_code != 0
m = String.new r.error_message m = String.new r.error_message.to_slice
yield IPC::Exception.new "error waiting for a new event: #{m}" raise Exception.new "cannot send the file descriptor of the requested service: #{m}"
end end
connection = IPC::Connection.new event.origin.unsafe_as(Pointer(LibIPC::Connection)).value # finally, the service should be closed in ipcd
message = event.message.unsafe_as(Pointer(LibIPC::Message)) service.close
return event.type, IPC::Message.new(message), connection
end
end
class NetworkD < IPC::NetworkD
@rules = RuleSet.new
@redirections = RedirectionSet.new
def parse_cli (argv : Array(String))
NetworkDCLIParser.parse_rules argv, @rules, @redirections
end
def to_s
@rules.to_s + "\n" + @redirections.to_s
end end
end end
ipcd = IPCd::Service.new "network"
plumberd = NetworkD.new "plumber"
# --deny <in|out> <service> <url> # --deny <in|out> <service> <url>
# --allow <in|ou> <service> <url> # --allow <in|ou> <service> <url>
# --redirect <service> <service> # --redirect <service> <service>
# --redirect <service-name> <new-service-name> <origin-url> <dest-url> # --redirect <service-name> <new-service-name> <origin-url> <dest-url>
plumberd.parse_cli ARGV ipcd.parse_cli ARGV
puts plumberd.to_s Baguette::Log.debug ipcd.to_s
plumberd.loop do |event| ipcd.base_timer = 30_000
puts "there is an event!" ipcd.timer = 30_000
ipcd.loop do |event|
case event case event
when IPC::Event::Connection when IPC::Event::Connection
puts "\033[32mConnection:\033[00m fd #{event.connection.fd}" Baguette::Log.debug "Connection: fd #{event.fd}"
when IPC::Event::Disconnection
puts "\033[32mDisconnection:\033[00m fd #{event.connection.fd}"
when IPC::Event::ExtraSocket
puts "\033[32mExtrasocket:\033[00m fd #{event.connection.fd}"
when IPC::Event::Switch
puts "\033[31mSwitch\033[00m"
when IPC::Exception
puts "\033[31mException\033[00m"
when IPC::Event::Message
puts "\033[32mthere is a message\033[00m"
puts event.message.to_s
plumberd.service_lookup event.message, event.connection when IPC::Event::Disconnection
Baguette::Log.debug "Disconnection: fd #{event.fd}"
when IPC::Event::ExtraSocket
Baguette::Log.debug "Extrasocket: fd #{event.fd}"
when IPC::Event::Switch
Baguette::Log.debug "Switch"
when IPC::Event::MessageReceived
Baguette::Log.debug "Message received: #{event.fd}"
Baguette::Log.debug event.message.to_s
begin
ipcd.service_lookup event.message, event.fd
rescue e
Baguette::Log.error "#{e}"
# when a problem occurs, close the client connection
begin
# LibIPC.ipc_connections_print pointerof(@connections)
ipcd.remove_fd event.fd
rescue e
Baguette::Log.error "Exception during a client removal: #{e}"
end
end
when IPC::Event::MessageSent
Baguette::Log.debug "Message sent: #{event.fd}"
when IPC::Event::Timer
Baguette::Log.debug "Timer"
when IPC::Exception
Baguette::Log.debug "IPC::Exception: #{event}"
end end
end end

4
src/plumberdcliparser.cr → src/ipcd_cli_parser.cr
View File

@ -1,5 +1,5 @@
class NetworkDCLIParser class IPCdCLIParser
def self.pack_args (argv : Array(String)) def self.pack_args (argv : Array(String))
last_flag = nil : String? last_flag = nil : String?
@ -13,7 +13,7 @@ class NetworkDCLIParser
end end
def self.parse_rules (argv : Array(String), rules : RuleSet, redirections : RedirectionSet) def self.parse_rules (argv : Array(String), rules : RuleSet, redirections : RedirectionSet)
args = NetworkDCLIParser.pack_args argv args = IPCdCLIParser.pack_args argv
args.each do |flag, parameters| args.each do |flag, parameters|
# puts "flag: #{flag}, params: #{parameters.join(' ')}" # puts "flag: #{flag}, params: #{parameters.join(' ')}"