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/*
* Copyright (c) 2019 PANTHEON.tech.
*
* 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 "log.h"
#include "gnmiserver.h"
#include "sysrepoapipool.h"
#include <argp.h>
#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <map>
#include <arpa/inet.h>
const char *argp_program_version = "0.0.1";
// const char *argp_program_bug_address = "<your@email.address>";
static char doc[] = "gNMI server implementation/integration for FD.io vpp ";
static char args_doc[] = "";
static struct argp_option options[] = {
{"address", 'a', "x.x.x.x", 0, "Destination IPv4 address"},
{"port", 'p', "port", 0, "Destination port"},
{"sysrepo", 's', "name", 0, "Sysrepo name"},
{"ssl/tls", 't', NULL, 0, "Enable ssl/tls"},
{"serverKey", 'k', "file", 0, "Server Key"},
{"serverCerts", 'c', "file", 0, "Server Certs"},
{"rootCert", 'r', "file", 0, "Root Cert"},
{ 0 }
};
struct arguments {
std::string ip_address;
std::string port;
std::string sysrepo_name;
bool enable_ssltls;
std::string server_key;
std::string server_certs;
std::string root_cert;
arguments() : ip_address{}, port{}, sysrepo_name{}, enable_ssltls{false},
server_key{}, server_certs{}, root_cert{} {}
};
static error_t check_ip(const std::string &str)
{
struct sockaddr_in sa;
int rc = inet_pton(AF_INET, str.c_str(), &(sa.sin_addr));
if (1 != rc) {
ERROR("Wrong IPv4 address format.");
return ARGP_KEY_ERROR;
}
return ARGP_KEY_ARG;
}
static error_t parse_opt(int key, char *arg, struct argp_state *state)
{
error_t rc = 0;
struct arguments *arguments = (struct arguments*) state->input;
switch (key) {
case 'a':
arguments->ip_address = std::string(arg);
rc = check_ip(arguments->ip_address);
break;
case 'p':
arguments->port = std::string(arg);
break;
case 't':
arguments->enable_ssltls = true;
break;
case 's':
arguments->sysrepo_name = std::string(arg);
break;
case 'k':
arguments->server_key = std::string(arg);
break;
case 'c':
arguments->server_certs = std::string(arg);
break;
case 'r':
arguments->root_cert = std::string(arg);
break;
case ARGP_KEY_ARG:
return rc;
default:
return ARGP_ERR_UNKNOWN;
}
return rc;
}
static struct argp argp = { options, parse_opt, args_doc, doc, 0, 0, 0 };
SysrepoApiPool sysrepoPoll;
static std::string read_cert(const std::string &file)
{
std::ifstream fo(file);
std::stringstream str;
str << fo.rdbuf();
return str.str();
}
void RunServer(const struct arguments &arg)
{
std::string server_address = std::string(arg.ip_address) +
std::string(":") + std::string(arg.port);
gNMIServer service(sysrepoPoll.get(arg.sysrepo_name));
ServerBuilder builder;
try {
if (arg.enable_ssltls) {
grpc::SslServerCredentialsOptions::PemKeyCertPair pkcp;
pkcp.private_key = read_cert(arg.server_key);
pkcp.cert_chain = read_cert(arg.server_certs);
grpc::SslServerCredentialsOptions ssl_opts;
ssl_opts.pem_root_certs = "";
ssl_opts.pem_key_cert_pairs.push_back(pkcp);
ssl_opts.pem_root_certs = read_cert(arg.root_cert);
auto creds = grpc::SslServerCredentials(ssl_opts);
builder.AddListeningPort(server_address, creds);
} else {
// Listen on the given address without any authentication mechanism.
builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
}
// Register "service" as the instance through which we'll communicate with
// clients. In this case it corresponds to an *synchronous* service.
builder.RegisterService(&service);
// Finally assemble the server.
// builder.
std::unique_ptr<Server> server(builder.BuildAndStart());
if (server != nullptr)
{
std::cout << "Server listening on " << server_address << std::endl;
// Wait for the server to shutdown. Note that some other thread must be
// responsible for shutting down the server for this call to ever return.
server->Wait();
}
else
{
throw std::logic_error("Failed to create Server.");
}
} catch(...) {
ERROR("Failed to create Server.");
exit(-1);
}
}
int main(int argc, char **argv)
{
struct arguments arguments;
init_log(LOG_PERROR);
error_t rc = argp_parse(&argp, argc, argv, 0, 0, &arguments);
if (ARGP_KEY_ARG != rc) {
argp_help(&argp, stdout, ARGP_HELP_SEE, argv[0]);
exit(-1);
}
if (arguments.ip_address.empty() || arguments.port.empty()) {
ERROR("IP address and port must be set.");
argp_help(&argp, stdout, ARGP_HELP_SEE, argv[0]);
exit(-1);
}
if (arguments.enable_ssltls) {
if (arguments.server_key.empty()) {
ERROR("Server key must be set.");
argp_help(&argp, stdout, ARGP_HELP_SEE, argv[0]);
exit(-1);
}
if (arguments.server_certs.empty()) {
ERROR("Server certificate must be set.");
argp_help(&argp, stdout, ARGP_HELP_SEE, argv[0]);
exit(-1);
}
}
auto &sysrepo = sysrepoPoll.get(arguments.sysrepo_name);
sysrepo.connect();
std::string destination = std::string(arguments.ip_address) +
std::string(":") + std::string(arguments.port);
RunServer(arguments);
close_log();
return 0;
}
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