206 lines
6.3 KiB
C
206 lines
6.3 KiB
C
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/*
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* \brief A net interface in form of a signal-driven NIC-packet handler
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* \author Martin Stein
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* \date 2016-08-24
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*/
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/*
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* Copyright (C) 2016 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _INTERFACE_H_
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#define _INTERFACE_H_
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/* Genode includes */
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#include <os/server.h>
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#include <os/session_policy.h>
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#include <util/avl_string.h>
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#include <nic_session/nic_session.h>
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/* local includes */
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#include <ip_route.h>
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namespace Net {
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using ::Nic::Packet_stream_sink;
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using ::Nic::Packet_stream_source;
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using ::Nic::Packet_descriptor;
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class Ethernet_frame;
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class Arp_packet;
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class Arp_waiter;
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class Arp_cache;
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class Arp_cache_entry;
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class Port_allocator;
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class Tcp_proxy;
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class Udp_proxy;
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class Interface;
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class Interface_tree;
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using Interface_list = Genode::List<Interface>;
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using Arp_waiter_list = Genode::List<Arp_waiter>;
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using Tcp_proxy_list = Genode::List<Tcp_proxy>;
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using Udp_proxy_list = Genode::List<Udp_proxy>;
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using Signal_rpc_member = Genode::Signal_rpc_member<Interface>;
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}
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class Net::Interface : public Genode::Session_label, public Genode::Avl_string_base
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{
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protected:
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Signal_rpc_member _sink_ack;
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Signal_rpc_member _sink_submit;
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Signal_rpc_member _source_ack;
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Signal_rpc_member _source_submit;
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private:
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Packet_descriptor _packet;
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Genode::Entrypoint &_ep;
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Ip_route_list _ip_routes;
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Mac_address const _router_mac;
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Ipv4_address const _router_ip;
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Mac_address const _mac;
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Genode::Allocator &_allocator;
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Genode::Session_policy _policy;
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bool const _proxy;
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unsigned _tcp_proxy;
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unsigned _tcp_proxy_used;
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Tcp_proxy_list &_tcp_proxies;
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Port_allocator &_tcp_port_alloc;
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unsigned _udp_proxy;
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unsigned _udp_proxy_used;
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Udp_proxy_list &_udp_proxies;
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Port_allocator &_udp_port_alloc;
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unsigned const _rtt_sec;
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Interface_tree &_interface_tree;
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Arp_cache &_arp_cache;
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Arp_waiter_list &_arp_waiters;
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bool _verbose;
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void _read_route(Genode::Xml_node &route_xn);
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Tcp_proxy *_find_tcp_proxy_by_client(Ipv4_address ip,
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Genode::uint16_t port);
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Udp_proxy *_find_udp_proxy_by_client(Ipv4_address ip,
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Genode::uint16_t port);
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Interface *_tlp_proxy_route(Genode::uint8_t tlp, void *ptr,
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Genode::uint16_t &dst_port,
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Ipv4_packet *ip, Ipv4_address &to,
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Ipv4_address &via);
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void _tlp_apply_port_proxy(Genode::uint8_t tlp, void *tlp_ptr,
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Ipv4_packet *ip, Ipv4_address client_ip,
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Genode::uint16_t src_port);
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Tcp_proxy *_find_tcp_proxy_by_proxy(Ipv4_address ip,
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Genode::uint16_t port);
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Udp_proxy *_find_udp_proxy_by_proxy(Ipv4_address ip,
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Genode::uint16_t port);
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void _handle_arp_reply(Arp_packet * const arp);
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void _handle_arp_request(Ethernet_frame * const eth,
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Genode::size_t const eth_size,
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Arp_packet * const arp);
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Arp_waiter *_new_arp_entry(Arp_waiter *arp_waiter,
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Arp_cache_entry *entry);
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void _remove_arp_waiter(Arp_waiter *arp_waiter);
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void _handle_arp(Ethernet_frame *eth, Genode::size_t size);
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void _handle_ip(Ethernet_frame *eth, Genode::size_t eth_size,
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bool &ack_packet, Packet_descriptor *packet);
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Tcp_proxy *_new_tcp_proxy(unsigned const client_port,
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Ipv4_address client_ip,
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Ipv4_address proxy_ip);
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Udp_proxy *_new_udp_proxy(unsigned const client_port,
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Ipv4_address client_ip,
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Ipv4_address proxy_ip);
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void _delete_tcp_proxy(Tcp_proxy * const proxy);
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bool _chk_delete_tcp_proxy(Tcp_proxy * &proxy);
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void _delete_udp_proxy(Udp_proxy * const proxy);
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bool _chk_delete_udp_proxy(Udp_proxy * &proxy);
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/***********************************
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** Packet-stream signal handlers **
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***********************************/
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void _ready_to_submit(unsigned);
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void _ack_avail(unsigned) { }
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void _ready_to_ack(unsigned);
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void _packet_avail(unsigned) { }
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public:
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struct Too_many_tcp_proxies : Genode::Exception { };
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struct Too_many_udp_proxies : Genode::Exception { };
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Interface(Server::Entrypoint &ep,
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Mac_address const router_mac,
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Ipv4_address const router_ip,
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Genode::Allocator &allocator,
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char const *args,
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Port_allocator &tcp_port_alloc,
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Port_allocator &udp_port_alloc,
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Mac_address const mac,
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Tcp_proxy_list &tcp_proxies,
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Udp_proxy_list &udp_proxies,
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unsigned const rtt_sec,
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Interface_tree &interface_tree,
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Arp_cache &arp_cache,
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Arp_waiter_list &arp_waiters,
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bool verbose);
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~Interface();
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void arp_broadcast(Ipv4_address ip_addr);
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void send(Ethernet_frame *eth, Genode::size_t eth_size);
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void handle_ethernet(void *src, Genode::size_t size, bool &ack,
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Packet_descriptor *packet);
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void continue_handle_ethernet(void *src, Genode::size_t size,
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Packet_descriptor *packet);
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/***************
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** Accessors **
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***************/
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Mac_address router_mac() const { return _router_mac; }
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Mac_address mac() const { return _mac; }
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Ipv4_address router_ip() const { return _router_ip; }
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Ip_route_list &ip_routes() { return _ip_routes; }
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Genode::Allocator &allocator() const { return _allocator; }
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Session_label &label() { return *this; }
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virtual Packet_stream_sink< ::Nic::Session::Policy> *sink() = 0;
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virtual Packet_stream_source< ::Nic::Session::Policy> *source() = 0;
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};
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struct Net::Interface_tree : Genode::Avl_tree<Genode::Avl_string_base>
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{
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Interface *find_by_label(char const *label);
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};
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#endif /* _INTERFACE_H_ */
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