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/*
* 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.
*
*/
#include <seastar/net/virtio.hh>
#include <seastar/net/dpdk.hh>
#include <seastar/core/reactor.hh>
#include <seastar/net/ip.hh>
#include <iostream>
#include <utility>
#include <algorithm>
using namespace seastar;
using namespace net;
void dump_packet(const packet& p) {
std::cout << "rx:";
auto f = p.frag(0);
for (unsigned i = 0; i < std::min(f.size, size_t(30)); ++i) {
char x[4];
std::sprintf(x, " %02x", uint8_t(f.base[i]));
std::cout << x;
}
std::cout << "\n";
}
future<> echo_packet(net::qp& netif, packet p) {
auto f = p.frag(0);
if (f.size < sizeof(eth_hdr)) {
return make_ready_future<>();
}
auto pos = 0;
auto eh = reinterpret_cast<eth_hdr*>(f.base + pos);
pos += sizeof(*eh);
*eh = ntoh(*eh);
if (eh->eth_proto != 0x0800) {
return make_ready_future<>();
}
auto iph = reinterpret_cast<ip_hdr*>(f.base + pos);
*iph = ntoh(*iph);
pos += iph->ihl * 4;
if (iph->ver != 4 || iph->ihl < 5 || iph->ip_proto != 1) {
return make_ready_future<>();
}
auto ip_len = iph->len;
auto icmph = reinterpret_cast<icmp_hdr*>(f.base + pos);
if (icmph->type != icmp_hdr::msg_type::echo_request) {
return make_ready_future<>();
}
auto icmp_len = ip_len - iph->ihl * 4;
std::swap(eh->src_mac, eh->dst_mac);
std::swap(iph->src_ip, iph->dst_ip);
icmph->type = icmp_hdr::msg_type::echo_reply;
icmph->csum = 0;
*iph = hton(*iph);
*eh = hton(*eh);
icmph->csum = ip_checksum(icmph, icmp_len);
iph->csum = 0;
iph->csum = ip_checksum(iph, iph->ihl * 4);
return netif.send(std::move(p));
}
#ifdef SEASTAR_HAVE_DPDK
void usage()
{
std::cout<<"Usage: echotest [-virtio|-dpdk]"<<std::endl;
std::cout<<" -virtio - use virtio backend (default)"<<std::endl;
std::cout<<" -dpdk - use dpdk-pmd backend"<<std::endl;
}
#endif
int main(int ac, char** av) {
std::unique_ptr<net::device> dnet;
net::qp* vnet;
boost::program_options::variables_map opts;
opts.insert(std::make_pair("tap-device", boost::program_options::variable_value(std::string("tap0"), false)));
#ifdef SEASTAR_HAVE_DPDK
if (ac > 2) {
usage();
return -1;
}
if ((ac == 1) || !std::strcmp(av[1], "-virtio")) {
dnet = create_virtio_net_device(opts);
} else if (!std::strcmp(av[1], "-dpdk")) {
dnet = create_dpdk_net_device();
} else {
usage();
return -1;
}
#else
dnet = create_virtio_net_device(opts);
#endif // SEASTAR_HAVE_DPDK
auto qp = dnet->init_local_queue(opts, 0);
vnet = qp.get();
dnet->set_local_queue(std::move(qp));
subscription<packet> rx =
dnet->receive([vnet] (packet p) {
return echo_packet(*vnet, std::move(p));
});
engine().run();
return 0;
}
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