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udp.cc
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udp.cc
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#include <iostream>
#include "udp.h"
const sockaddr_in *udp::Address::ptr() const {
return address.get();
}
void udp::Address::setPort(uint16_t new_port) {
address->sin_port = htons(new_port);
}
uint16_t udp::Address::getPort() const {
return ntohs(address->sin_port);
}
std::string udp::Address::getIP() const {
return std::string(inet_ntoa(address->sin_addr));
}
udp::Address &udp::Address::operator=(const udp::Address &rhs) {
if (this != &rhs) {
*address = *rhs.address;
}
return *this;
}
udp::Socket::~Socket() {
close(fd);
}
void udp::Socket::send(const udp::Datagram &datagram) {
sendto(fd,
datagram.data.data(),
datagram.data.size(),
0,
(const sockaddr*) datagram.address.ptr(),
sizeof(sockaddr_in));
}
udp::Datagram udp::Socket::receive() {
std::vector<uint8_t> message(MAX_DATAGRAM_SIZE);
sockaddr_in addr;
socklen_t sock_size = sizeof(sockaddr_in);
ssize_t count = recvfrom(fd, message.data(), MAX_DATAGRAM_SIZE, 0, (sockaddr*) &addr, &sock_size);
if (count < 0) {
throw IOException("Error in receive.");
}
message.resize((unsigned long) count);
return Datagram(Address(addr), message);
}
void udp::Socket::bindToPort(uint16_t port) {
sockaddr_in local_address;
local_address.sin_family = AF_INET;
local_address.sin_addr.s_addr = htonl(INADDR_ANY);
local_address.sin_port = htons(port);
if (bind(fd, (struct sockaddr *)&local_address, sizeof local_address) < 0)
throw SocketException("Error while binding socket to port.");
}
udp::Datagram udp::Socket::receive(long timeout_ms) {
timeval timeout;
timeout.tv_sec = timeout_ms / 1000;
timeout.tv_usec = timeout_ms % 1000 * 1000;
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
int sel = select(FD_SETSIZE, &set, nullptr, nullptr, &timeout);
if (sel > 0) return receive();
return Datagram(udp::Address(sockaddr_in()), "");
}
void udp::Broadcaster::send(const std::vector<uint8_t> &bytes) {
sendto(fd,
bytes.data(),
bytes.size(),
0,
(const sockaddr*) address.ptr(),
sizeof(sockaddr_in));
}
udp::Datagram udp::Broadcaster::receive() {
std::vector<uint8_t> message(Socket::MAX_DATAGRAM_SIZE);
sockaddr_in addr;
socklen_t sock_size = sizeof(sockaddr_in);
ssize_t count = recvfrom(fd, message.data(), Socket::MAX_DATAGRAM_SIZE, 0, (sockaddr*) &addr, &sock_size);
if (count < 0) {
throw IOException("Error in receive.");
}
message.resize((unsigned long) count);
return Datagram(Address(addr), message);
}
void udp::Broadcaster::send(const std::string &str) {
sendto(fd,
str.data(),
str.size(),
0,
(const sockaddr*) address.ptr(),
sizeof(sockaddr_in));
}
udp::Datagram udp::Broadcaster::receive(long timeout_ms) {
timeval timeout;
timeout.tv_sec = timeout_ms / 1000;
timeout.tv_usec = timeout_ms % 1000 * 1000;
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
int sel = select(FD_SETSIZE, &set, nullptr, nullptr, &timeout);
if (sel > 0) return receive();
return Datagram(udp::Address(sockaddr_in()), "");
}
udp::Broadcaster::~Broadcaster() {
close(fd);
}
std::vector<uint8_t> udp::GroupReceiver::receive() {
std::vector<uint8_t> buffer(Socket::MAX_DATAGRAM_SIZE);
ssize_t count = read(fd, buffer.data(), Socket::MAX_DATAGRAM_SIZE);
if (count < 0)
throw IOException("Error while reading from group address.");
buffer.resize((unsigned long) count);
return buffer;
}
std::vector<uint8_t> udp::GroupReceiver::receive(long timeout_ms) {
timeval timeout;
timeout.tv_sec = timeout_ms / 1000;
timeout.tv_usec = timeout_ms % 1000 * 1000;
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
int sel = select(FD_SETSIZE, &set, nullptr, nullptr, &timeout);
if (sel > 0) return receive();
return {};
}
udp::GroupReceiver::~GroupReceiver() {
setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (void*)&mreq, sizeof(ip_mreq));
close(fd);
}