+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-/*
- * This file is open source software, licensed to you under the terms
- * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
- * distributed with this work for additional information regarding copyright
- * ownership. You may not use this file except in compliance with the License.
- *
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-/*
- * Copyright (C) 2014 Cloudius Systems, Ltd.
- *
- */
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2015 XSky <haomai@xsky.com>
- *
- * Author: Haomai Wang <haomaiwang@gmail.com>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-
-#ifndef CEPH_MSG_IP_H_
-#define CEPH_MSG_IP_H_
-
-#include <arpa/inet.h>
-#include <unordered_map>
-#include <cstdint>
-#include <array>
-#include <map>
-#include <list>
-#include <chrono>
-
-#include "msg/async/Event.h"
-#include "common/Throttle.h"
-
-#include "array_map.h"
-#include "ARP.h"
-#include "IPChecksum.h"
-#include "ip_types.h"
-#include "const.h"
-#include "net.h"
-#include "PacketUtil.h"
-#include "toeplitz.h"
-
-class ipv4;
-template <ip_protocol_num ProtoNum>
-class ipv4_l4;
-
-template <typename InetTraits>
-class tcp;
-
-struct ipv4_traits {
- using address_type = ipv4_address;
- using inet_type = ipv4_l4<ip_protocol_num::tcp>;
- struct l4packet {
- ipv4_address to;
- Packet p;
- ethernet_address e_dst;
- ip_protocol_num proto_num;
- };
- using packet_provider_type = std::function<Tub<l4packet> ()>;
- static void tcp_pseudo_header_checksum(checksummer& csum, ipv4_address src, ipv4_address dst, uint16_t len) {
- csum.sum_many(src.ip, dst.ip, uint8_t(0), uint8_t(ip_protocol_num::tcp), len);
- }
- static constexpr uint8_t ip_hdr_len_min = ipv4_hdr_len_min;
-};
-
-template <ip_protocol_num ProtoNum>
-class ipv4_l4 {
- public:
- ipv4& _inet;
- public:
- ipv4_l4(ipv4& inet) : _inet(inet) {}
- void register_packet_provider(ipv4_traits::packet_provider_type func);
- void wait_l2_dst_address(ipv4_address to, Packet p, resolution_cb cb);
-};
-
-class ip_protocol {
- public:
- virtual ~ip_protocol() {}
- virtual void received(Packet p, ipv4_address from, ipv4_address to) = 0;
- virtual bool forward(forward_hash& out_hash_data, Packet& p, size_t off) { return true; }
-};
-
-template <typename InetTraits>
-struct l4connid {
- using ipaddr = typename InetTraits::address_type;
- using inet_type = typename InetTraits::inet_type;
- struct connid_hash;
-
- ipaddr local_ip;
- ipaddr foreign_ip;
- uint16_t local_port;
- uint16_t foreign_port;
-
- bool operator==(const l4connid& x) const {
- return local_ip == x.local_ip
- && foreign_ip == x.foreign_ip
- && local_port == x.local_port
- && foreign_port == x.foreign_port;
- }
-
- uint32_t hash(const rss_key_type& rss_key) {
- forward_hash hash_data;
- hash_data.push_back(hton(foreign_ip.ip));
- hash_data.push_back(hton(local_ip.ip));
- hash_data.push_back(hton(foreign_port));
- hash_data.push_back(hton(local_port));
- return toeplitz_hash(rss_key, hash_data);
- }
-};
-
-class ipv4_tcp final : public ip_protocol {
- ipv4_l4<ip_protocol_num::tcp> _inet_l4;
- std::unique_ptr<tcp<ipv4_traits>> _tcp;
- public:
- ipv4_tcp(ipv4& inet, EventCenter *c);
- ~ipv4_tcp();
- virtual void received(Packet p, ipv4_address from, ipv4_address to);
- virtual bool forward(forward_hash& out_hash_data, Packet& p, size_t off) override;
- friend class ipv4;
-};
-
-struct icmp_hdr {
- enum class msg_type : uint8_t {
- echo_reply = 0,
- echo_request = 8,
- };
- msg_type type;
- uint8_t code;
- uint16_t csum;
- uint32_t rest;
-} __attribute__((packed));
-
-
-class icmp {
- public:
- using ipaddr = ipv4_address;
- using inet_type = ipv4_l4<ip_protocol_num::icmp>;
- explicit icmp(CephContext *c, inet_type& inet)
- : cct(c), _inet(inet), _queue_space(c, "DPDK::icmp::_queue_space", 212992) {
- _inet.register_packet_provider([this] {
- Tub<ipv4_traits::l4packet> l4p;
- if (!_packetq.empty()) {
- l4p = std::move(_packetq.front());
- _packetq.pop_front();
- _queue_space.put(l4p->p.len());
- }
- return l4p;
- });
- }
- void received(Packet p, ipaddr from, ipaddr to);
-
- private:
- CephContext *cct;
- // ipv4_l4<ip_protocol_num::icmp>
- inet_type& _inet;
- circular_buffer<ipv4_traits::l4packet> _packetq;
- Throttle _queue_space;
-};
-
-class ipv4_icmp final : public ip_protocol {
- CephContext *cct;
- ipv4_l4<ip_protocol_num::icmp> _inet_l4;
- icmp _icmp;
- public:
- ipv4_icmp(CephContext *c, ipv4& inet) : cct(c), _inet_l4(inet), _icmp(c, _inet_l4) {}
- virtual void received(Packet p, ipv4_address from, ipv4_address to) {
- _icmp.received(std::move(p), from, to);
- }
- friend class ipv4;
-};
-
-struct ip_hdr;
-
-struct ip_packet_filter {
- virtual ~ip_packet_filter() {};
- virtual void handle(Packet& p, ip_hdr* iph, ethernet_address from, bool & handled) = 0;
-};
-
-struct ipv4_frag_id {
- struct hash;
- ipv4_address src_ip;
- ipv4_address dst_ip;
- uint16_t identification;
- uint8_t protocol;
- bool operator==(const ipv4_frag_id& x) const {
- return src_ip == x.src_ip &&
- dst_ip == x.dst_ip &&
- identification == x.identification &&
- protocol == x.protocol;
- }
-};
-
-struct ipv4_frag_id::hash : private std::hash<ipv4_address>,
- private std::hash<uint16_t>, private std::hash<uint8_t> {
- size_t operator()(const ipv4_frag_id& id) const noexcept {
- using h1 = std::hash<ipv4_address>;
- using h2 = std::hash<uint16_t>;
- using h3 = std::hash<uint8_t>;
- return h1::operator()(id.src_ip) ^
- h1::operator()(id.dst_ip) ^
- h2::operator()(id.identification) ^
- h3::operator()(id.protocol);
- }
-};
-
-struct ipv4_tag {};
-using ipv4_packet_merger = packet_merger<uint32_t, ipv4_tag>;
-
-class interface;
-
-class ipv4 {
- public:
- using address_type = ipv4_address;
- using proto_type = uint16_t;
- static address_type broadcast_address() { return ipv4_address(0xffffffff); }
- static proto_type arp_protocol_type() { return proto_type(eth_protocol_num::ipv4); }
- CephContext *cct;
- EventCenter *center;
-
- private:
- interface* _netif;
- std::vector<ipv4_traits::packet_provider_type> _pkt_providers;
- Tub<uint64_t> frag_timefd;
- EventCallbackRef frag_handler;
- arp _global_arp;
- arp_for<ipv4> _arp;
- ipv4_address _host_address;
- ipv4_address _gw_address;
- ipv4_address _netmask;
- l3_protocol _l3;
- subscription<Packet, ethernet_address> _rx_packets;
- ipv4_tcp _tcp;
- ipv4_icmp _icmp;
- array_map<ip_protocol*, 256> _l4;
- ip_packet_filter *_packet_filter;
- struct frag {
- Packet header;
- ipv4_packet_merger data;
- utime_t rx_time;
- uint32_t mem_size = 0;
- // fragment with MF == 0 inidates it is the last fragment
- bool last_frag_received = false;
-
- Packet get_assembled_packet(ethernet_address from, ethernet_address to);
- int32_t merge(ip_hdr &h, uint16_t offset, Packet p);
- bool is_complete();
- };
- std::unordered_map<ipv4_frag_id, frag, ipv4_frag_id::hash> _frags;
- std::list<ipv4_frag_id> _frags_age;
- static utime_t _frag_timeout;
- static constexpr uint32_t _frag_low_thresh{3 * 1024 * 1024};
- static constexpr uint32_t _frag_high_thresh{4 * 1024 * 1024};
- uint32_t _frag_mem = 0;
- circular_buffer<l3_protocol::l3packet> _packetq;
- unsigned _pkt_provider_idx = 0;
- PerfCounters *perf_logger;
-
- private:
- int handle_received_packet(Packet p, ethernet_address from);
- bool forward(forward_hash& out_hash_data, Packet& p, size_t off);
- Tub<l3_protocol::l3packet> get_packet();
- bool in_my_netmask(ipv4_address a) const {
- return !((a.ip ^ _host_address.ip) & _netmask.ip);
- }
- void frag_limit_mem();
- void frag_drop(ipv4_frag_id frag_id, uint32_t dropped_size) {
- _frags.erase(frag_id);
- _frag_mem -= dropped_size;
- }
- void frag_arm(utime_t now) {
- auto tp = now + _frag_timeout;
- frag_timefd.construct(center->create_time_event(tp.to_nsec() / 1000, frag_handler));
- }
- void frag_arm() {
- auto now = ceph_clock_now();
- frag_timefd.construct(center->create_time_event(now.to_nsec() / 1000, frag_handler));
- }
-
- public:
- void frag_timeout();
-
- public:
- explicit ipv4(CephContext *c, EventCenter *cen, interface* netif);
- ~ipv4() {
- delete frag_handler;
- }
- void set_host_address(ipv4_address ip) {
- _host_address = ip;
- _arp.set_self_addr(ip);
- }
- ipv4_address host_address() {
- return _host_address;
- }
- void set_gw_address(ipv4_address ip) {
- _gw_address = ip;
- }
- ipv4_address gw_address() const {
- return _gw_address;
- }
- void set_netmask_address(ipv4_address ip) {
- _netmask = ip;
- }
- ipv4_address netmask_address() const {
- return _netmask;
- }
- interface *netif() const {
- return _netif;
- }
- // TODO or something. Should perhaps truly be a list
- // of filters. With ordering. And blackjack. Etc.
- // But for now, a simple single raw pointer suffices
- void set_packet_filter(ip_packet_filter *f) {
- _packet_filter = f;
- }
- ip_packet_filter * packet_filter() const {
- return _packet_filter;
- }
- void send(ipv4_address to, ip_protocol_num proto_num, Packet p, ethernet_address e_dst);
- tcp<ipv4_traits>& get_tcp() { return *_tcp._tcp; }
- void register_l4(proto_type id, ip_protocol* handler);
- const hw_features& get_hw_features() const;
- static bool needs_frag(Packet& p, ip_protocol_num proto_num, hw_features hw_features) {
- if (p.len() + ipv4_hdr_len_min <= hw_features.mtu)
- return false;
-
- if ((proto_num == ip_protocol_num::tcp && hw_features.tx_tso))
- return false;
-
- return true;
- }
- void learn(ethernet_address l2, ipv4_address l3) {
- _arp.learn(l2, l3);
- }
- void register_packet_provider(ipv4_traits::packet_provider_type&& func) {
- _pkt_providers.push_back(std::move(func));
- }
- void wait_l2_dst_address(ipv4_address to, Packet p, resolution_cb cb);
-};
-
-template <ip_protocol_num ProtoNum>
-inline void ipv4_l4<ProtoNum>::register_packet_provider(
- ipv4_traits::packet_provider_type func) {
- _inet.register_packet_provider([func] {
- auto l4p = func();
- if (l4p) {
- (*l4p).proto_num = ProtoNum;
- }
- return l4p;
- });
-}
-
-template <ip_protocol_num ProtoNum>
-inline void ipv4_l4<ProtoNum>::wait_l2_dst_address(ipv4_address to, Packet p, resolution_cb cb) {
- _inet.wait_l2_dst_address(to, std::move(p), std::move(cb));
-}
-
-struct ip_hdr {
- uint8_t ihl : 4;
- uint8_t ver : 4;
- uint8_t dscp : 6;
- uint8_t ecn : 2;
- uint16_t len;
- uint16_t id;
- uint16_t frag;
- enum class frag_bits : uint8_t { mf = 13, df = 14, reserved = 15, offset_shift = 3 };
- uint8_t ttl;
- uint8_t ip_proto;
- uint16_t csum;
- ipv4_address src_ip;
- ipv4_address dst_ip;
- uint8_t options[0];
- ip_hdr hton() {
- ip_hdr hdr = *this;
- hdr.len = ::hton(len);
- hdr.id = ::hton(id);
- hdr.frag = ::hton(frag);
- hdr.csum = ::hton(csum);
- hdr.src_ip.ip = ::hton(src_ip.ip);
- hdr.dst_ip.ip = ::hton(dst_ip.ip);
- return hdr;
- }
- ip_hdr ntoh() {
- ip_hdr hdr = *this;
- hdr.len = ::ntoh(len);
- hdr.id = ::ntoh(id);
- hdr.frag = ::ntoh(frag);
- hdr.csum = ::ntoh(csum);
- hdr.src_ip = src_ip.ntoh();
- hdr.dst_ip = dst_ip.ntoh();
- return hdr;
- }
-
- bool mf() { return frag & (1 << uint8_t(frag_bits::mf)); }
- bool df() { return frag & (1 << uint8_t(frag_bits::df)); }
- uint16_t offset() { return frag << uint8_t(frag_bits::offset_shift); }
-} __attribute__((packed));
-
-template <typename InetTraits>
-struct l4connid<InetTraits>::connid_hash : private std::hash<ipaddr>, private std::hash<uint16_t> {
- size_t operator()(const l4connid<InetTraits>& id) const noexcept {
- using h1 = std::hash<ipaddr>;
- using h2 = std::hash<uint16_t>;
- return h1::operator()(id.local_ip)
- ^ h1::operator()(id.foreign_ip)
- ^ h2::operator()(id.local_port)
- ^ h2::operator()(id.foreign_port);
- }
-};
-
-#endif /* CEPH_MSG_IP_H */
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