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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// 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.
#include <fcntl.h>
#include <getopt.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <iostream>
#include <unordered_map>
#include "arpa/inet.h"
#include "include/grpcpp/security/server_credentials.h"
#include "include/grpcpp/server_builder.h"
#include "test/packetimpact/proto/posix_server.grpc.pb.h"
#include "test/packetimpact/proto/posix_server.pb.h"
// Converts a sockaddr_storage to a Sockaddr message.
::grpc::Status sockaddr_to_proto(const sockaddr_storage &addr,
socklen_t addrlen,
posix_server::Sockaddr *sockaddr_proto) {
switch (addr.ss_family) {
case AF_INET: {
auto addr_in = reinterpret_cast<const sockaddr_in *>(&addr);
auto response_in = sockaddr_proto->mutable_in();
response_in->set_family(addr_in->sin_family);
response_in->set_port(ntohs(addr_in->sin_port));
response_in->mutable_addr()->assign(
reinterpret_cast<const char *>(&addr_in->sin_addr.s_addr), 4);
return ::grpc::Status::OK;
}
case AF_INET6: {
auto addr_in6 = reinterpret_cast<const sockaddr_in6 *>(&addr);
auto response_in6 = sockaddr_proto->mutable_in6();
response_in6->set_family(addr_in6->sin6_family);
response_in6->set_port(ntohs(addr_in6->sin6_port));
response_in6->set_flowinfo(ntohl(addr_in6->sin6_flowinfo));
response_in6->mutable_addr()->assign(
reinterpret_cast<const char *>(&addr_in6->sin6_addr.s6_addr), 16);
response_in6->set_scope_id(ntohl(addr_in6->sin6_scope_id));
return ::grpc::Status::OK;
}
}
return ::grpc::Status(grpc::StatusCode::INVALID_ARGUMENT, "Unknown Sockaddr");
}
class PosixImpl final : public posix_server::Posix::Service {
::grpc::Status Socket(grpc_impl::ServerContext *context,
const ::posix_server::SocketRequest *request,
::posix_server::SocketResponse *response) override {
response->set_fd(
socket(request->domain(), request->type(), request->protocol()));
response->set_errno_(errno);
return ::grpc::Status::OK;
}
::grpc::Status Bind(grpc_impl::ServerContext *context,
const ::posix_server::BindRequest *request,
::posix_server::BindResponse *response) override {
if (!request->has_addr()) {
return ::grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
"Missing address");
}
sockaddr_storage addr;
switch (request->addr().sockaddr_case()) {
case posix_server::Sockaddr::SockaddrCase::kIn: {
auto request_in = request->addr().in();
if (request_in.addr().size() != 4) {
return ::grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
"IPv4 address must be 4 bytes");
}
auto addr_in = reinterpret_cast<sockaddr_in *>(&addr);
addr_in->sin_family = request_in.family();
addr_in->sin_port = htons(request_in.port());
request_in.addr().copy(
reinterpret_cast<char *>(&addr_in->sin_addr.s_addr), 4);
break;
}
case posix_server::Sockaddr::SockaddrCase::kIn6: {
auto request_in6 = request->addr().in6();
if (request_in6.addr().size() != 16) {
return ::grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
"IPv6 address must be 16 bytes");
}
auto addr_in6 = reinterpret_cast<sockaddr_in6 *>(&addr);
addr_in6->sin6_family = request_in6.family();
addr_in6->sin6_port = htons(request_in6.port());
addr_in6->sin6_flowinfo = htonl(request_in6.flowinfo());
request_in6.addr().copy(
reinterpret_cast<char *>(&addr_in6->sin6_addr.s6_addr), 16);
addr_in6->sin6_scope_id = htonl(request_in6.scope_id());
break;
}
case posix_server::Sockaddr::SockaddrCase::SOCKADDR_NOT_SET:
default:
return ::grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
"Unknown Sockaddr");
}
response->set_ret(bind(request->sockfd(),
reinterpret_cast<sockaddr *>(&addr), sizeof(addr)));
response->set_errno_(errno);
return ::grpc::Status::OK;
}
::grpc::Status GetSockName(
grpc_impl::ServerContext *context,
const ::posix_server::GetSockNameRequest *request,
::posix_server::GetSockNameResponse *response) override {
sockaddr_storage addr;
socklen_t addrlen = sizeof(addr);
response->set_ret(getsockname(
request->sockfd(), reinterpret_cast<sockaddr *>(&addr), &addrlen));
response->set_errno_(errno);
return sockaddr_to_proto(addr, addrlen, response->mutable_addr());
}
::grpc::Status Listen(grpc_impl::ServerContext *context,
const ::posix_server::ListenRequest *request,
::posix_server::ListenResponse *response) override {
response->set_ret(listen(request->sockfd(), request->backlog()));
response->set_errno_(errno);
return ::grpc::Status::OK;
}
::grpc::Status Accept(grpc_impl::ServerContext *context,
const ::posix_server::AcceptRequest *request,
::posix_server::AcceptResponse *response) override {
sockaddr_storage addr;
socklen_t addrlen = sizeof(addr);
response->set_fd(accept(request->sockfd(),
reinterpret_cast<sockaddr *>(&addr), &addrlen));
response->set_errno_(errno);
return sockaddr_to_proto(addr, addrlen, response->mutable_addr());
}
::grpc::Status SetSockOpt(
grpc_impl::ServerContext *context,
const ::posix_server::SetSockOptRequest *request,
::posix_server::SetSockOptResponse *response) override {
response->set_ret(setsockopt(request->sockfd(), request->level(),
request->optname(), request->optval().c_str(),
request->optval().size()));
response->set_errno_(errno);
return ::grpc::Status::OK;
}
::grpc::Status SetSockOptTimeval(
::grpc::ServerContext *context,
const ::posix_server::SetSockOptTimevalRequest *request,
::posix_server::SetSockOptTimevalResponse *response) override {
timeval tv = {.tv_sec = static_cast<__time_t>(request->timeval().seconds()),
.tv_usec = static_cast<__suseconds_t>(
request->timeval().microseconds())};
response->set_ret(setsockopt(request->sockfd(), request->level(),
request->optname(), &tv, sizeof(tv)));
response->set_errno_(errno);
return ::grpc::Status::OK;
}
::grpc::Status Close(grpc_impl::ServerContext *context,
const ::posix_server::CloseRequest *request,
::posix_server::CloseResponse *response) override {
response->set_ret(close(request->fd()));
response->set_errno_(errno);
return ::grpc::Status::OK;
}
};
// Parse command line options. Returns a pointer to the first argument beyond
// the options.
void parse_command_line_options(int argc, char *argv[], std::string *ip,
int *port) {
static struct option options[] = {{"ip", required_argument, NULL, 1},
{"port", required_argument, NULL, 2},
{0, 0, 0, 0}};
// Parse the arguments.
int c;
while ((c = getopt_long(argc, argv, "", options, NULL)) > 0) {
if (c == 1) {
*ip = optarg;
} else if (c == 2) {
*port = std::stoi(std::string(optarg));
}
}
}
void run_server(const std::string &ip, int port) {
PosixImpl posix_service;
grpc::ServerBuilder builder;
std::string server_address = ip + ":" + std::to_string(port);
// Set the authentication mechanism.
std::shared_ptr<grpc::ServerCredentials> creds =
grpc::InsecureServerCredentials();
builder.AddListeningPort(server_address, creds);
builder.RegisterService(&posix_service);
std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
std::cerr << "Server listening on " << server_address << std::endl;
server->Wait();
std::cerr << "posix_server is finished." << std::endl;
}
int main(int argc, char *argv[]) {
std::cerr << "posix_server is starting." << std::endl;
std::string ip;
int port;
parse_command_line_options(argc, argv, &ip, &port);
std::cerr << "Got IP " << ip << " and port " << port << "." << std::endl;
run_server(ip, port);
}
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