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/**
* Copyright (c) 2018 Cornell University.
*
* Author: Ted Yin <tederminant@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _SALTICIDAE_NETADDR_H
#define _SALTICIDAE_NETADDR_H
#include <string>
#include <cstring>
#include <cstdint>
#include <arpa/inet.h>
#include <netdb.h>
#include "salticidae/util.h"
#include "salticidae/stream.h"
namespace salticidae {
/* TODO: IPv6 support */
struct NetAddr {
uint32_t ip;
uint16_t port;
/* construct from human-readable format */
NetAddr(): ip(0), port(0) {}
NetAddr(uint32_t ip, uint16_t port): ip(ip), port(port) {}
NetAddr(const std::string &_addr, uint16_t _port) {
set_by_ip_port(_addr, _port);
}
void set_by_ip_port(const std::string &_addr, uint16_t _port) {
struct hostent *h;
if ((h = gethostbyname(_addr.c_str())) == nullptr)
throw SalticidaeError("gethostbyname failed");
memmove(&ip, h->h_addr_list[0], sizeof(in_addr_t));
port = htons(_port);
}
NetAddr(const std::string &ip_port_addr) {
size_t pos = ip_port_addr.find(":");
if (pos == std::string::npos)
throw SalticidaeError("invalid port format");
std::string ip_str = ip_port_addr.substr(0, pos);
std::string port_str = ip_port_addr.substr(pos + 1);
long port;
try {
port = std::stol(port_str.c_str());
} catch (std::logic_error &) {
throw SalticidaeError("invalid port format");
}
if (port < 0)
throw SalticidaeError("negative port number");
if (port > 0xffff)
throw SalticidaeError("port number greater than 0xffff");
set_by_ip_port(ip_str, (uint16_t)port);
}
/* construct from unix socket format */
NetAddr(const struct sockaddr_in *addr_sock) {
ip = addr_sock->sin_addr.s_addr;
port = addr_sock->sin_port;
}
bool operator==(const NetAddr &other) const {
return ip == other.ip && port == other.port;
}
bool operator!=(const NetAddr &other) const {
return ip != other.ip || port != other.port;
}
operator std::string() const {
struct in_addr in;
in.s_addr = ip;
DataStream s;
s << "<NetAddr " << std::string(inet_ntoa(in))
<< ":" << std::to_string(ntohs(port)) << ">";
return std::move(s);
}
bool is_null() const { return ip == 0 && port == 0; }
void serialize(DataStream &s) const { s << ip << port; }
void unserialize(DataStream &s) { s >> ip >> port; }
};
}
namespace std {
template <>
struct hash<salticidae::NetAddr> {
size_t operator()(const salticidae::NetAddr &k) const {
return k.ip ^ k.port;
}
};
template <>
struct hash<const salticidae::NetAddr> {
size_t operator()(const salticidae::NetAddr &k) const {
return k.ip ^ k.port;
}
};
}
#endif
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