diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/InetAddress.cpp | 171 | ||||
| -rw-r--r-- | lib/InetAddress.h | 80 | ||||
| -rw-r--r-- | lib/Socket.cpp | 898 | ||||
| -rw-r--r-- | lib/Socket.h | 294 | ||||
| -rw-r--r-- | lib/ThreadsafeQueue.h | 176 | ||||
| -rw-r--r-- | lib/UdpSocket.cpp | 349 | ||||
| -rw-r--r-- | lib/UdpSocket.h | 206 |
7 files changed, 1368 insertions, 806 deletions
diff --git a/lib/InetAddress.cpp b/lib/InetAddress.cpp deleted file mode 100644 index d92e1b9..0000000 --- a/lib/InetAddress.cpp +++ /dev/null @@ -1,171 +0,0 @@ -/* - Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the - Queen in Right of Canada (Communications Research Center Canada) - - Copyright (C) 2016 - Matthias P. Braendli, matthias.braendli@mpb.li - - http://www.opendigitalradio.org - */ -/* - This file is part of ODR-DabMux. - - ODR-DabMux is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as - published by the Free Software Foundation, either version 3 of the - License, or (at your option) any later version. - - ODR-DabMux is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "InetAddress.h" -#include <iostream> -#include <stdio.h> -#include <errno.h> -#include <string.h> - -#ifdef TRACE_ON -# ifndef TRACE_CLASS -# define TRACE_CLASS(clas, func) cout <<"-" <<(clas) <<"\t(" <<this <<")::" <<(func) <<endl -# define TRACE_STATIC(clas, func) cout <<"-" <<(clas) <<"\t(static)::" <<(func) <<endl -# endif -#else -# ifndef TRACE_CLASS -# define TRACE_CLASS(clas, func) -# define TRACE_STATIC(clas, func) -# endif -#endif - - -int inetErrNo = 0; -const char *inetErrMsg = nullptr; -const char *inetErrDesc = nullptr; - - -/** - * Constructs an IP address. - * @param port The port of this address - * @param name The name of this address - */ -InetAddress::InetAddress(int port, const char* name) { - TRACE_CLASS("InetAddress", "InetAddress(int, char)"); - addr.sin_family = PF_INET; - addr.sin_addr.s_addr = htons(INADDR_ANY); - addr.sin_port = htons(port); - if (name) - setAddress(name); -} - - -/** - * Constructs a copy of inet - * @param inet The address to be copied - */ -InetAddress::InetAddress(const InetAddress &inet) { - TRACE_CLASS("InetAddress", "InetAddress(InetAddress)"); - memcpy(&addr, &inet.addr, sizeof(addr)); -} - - -/// Destructor -InetAddress::~InetAddress() { - TRACE_CLASS("InetAddress" ,"~InetAddress()"); -} - - -/// Returns the raw IP address of this InetAddress object. -sockaddr *InetAddress::getAddress() { - TRACE_CLASS("InetAddress", "getAddress()"); - return (sockaddr *)&addr; -} - - -/// Return the port of this address. -int InetAddress::getPort() -{ - TRACE_CLASS("InetAddress", "getPort()"); - return ntohs(addr.sin_port); -} - - -/** - * Returns the IP address string "%d.%d.%d.%d". - * @return IP address - */ -const char *InetAddress::getHostAddress() { - TRACE_CLASS("InetAddress", "getHostAddress()"); - return inet_ntoa(addr.sin_addr); -} - - -/// Returns true if this address is multicast -bool InetAddress::isMulticastAddress() { - TRACE_CLASS("InetAddress", "isMulticastAddress()"); - return IN_MULTICAST(ntohl(addr.sin_addr.s_addr)); // a modifier -} - - -/** - * Set the port number - * @param port The new port number - */ -void InetAddress::setPort(int port) -{ - TRACE_CLASS("InetAddress", "setPort(int)"); - addr.sin_port = htons(port); -} - - -/** - * Set the address - * @param name The new address name - * @return 0 if ok - * -1 if error - */ -int InetAddress::setAddress(const std::string& name) -{ - TRACE_CLASS("InetAddress", "setAddress(string)"); - if (!name.empty()) { - if (atoi(name.c_str())) { // If it start with a number - if ((addr.sin_addr.s_addr = inet_addr(name.c_str())) == INADDR_NONE) { - addr.sin_addr.s_addr = htons(INADDR_ANY); - inetErrNo = 0; - inetErrMsg = "Invalid address"; - inetErrDesc = name.c_str(); - return -1; - } - } - else { // Assume it's a real name - hostent *host = gethostbyname(name.c_str()); - if (host) { - addr.sin_addr = *(in_addr *)(host->h_addr); - } else { - addr.sin_addr.s_addr = htons(INADDR_ANY); - inetErrNo = 0; - inetErrMsg = "Could not find address"; - inetErrDesc = name.c_str(); - return -1; - } - } - } - else { - addr.sin_addr.s_addr = INADDR_ANY; - } - return 0; -} - - -void setInetError(const char* description) -{ - inetErrNo = 0; - inetErrNo = errno; - inetErrMsg = strerror(inetErrNo); - inetErrDesc = description; -} - diff --git a/lib/InetAddress.h b/lib/InetAddress.h deleted file mode 100644 index 0ccc70b..0000000 --- a/lib/InetAddress.h +++ /dev/null @@ -1,80 +0,0 @@ -/* - Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the - Queen in Right of Canada (Communications Research Center Canada) - - Copyright (C) 2016 - Matthias P. Braendli, matthias.braendli@mpb.li - - http://www.opendigitalradio.org - */ -/* - This file is part of ODR-DabMux. - - ODR-DabMux is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as - published by the Free Software Foundation, either version 3 of the - License, or (at your option) any later version. - - ODR-DabMux is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>. - */ - -#ifndef _InetAddress -#define _InetAddress - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include <stdlib.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <unistd.h> -#include <netdb.h> -#include <arpa/inet.h> -#include <pthread.h> -#include <string> - -#define SOCKET int -#define INVALID_SOCKET -1 -#define INVALID_PORT -1 - - -/// The last error number -extern int inetErrNo; -/// The last error message -extern const char *inetErrMsg; -/// The description of the last error -extern const char *inetErrDesc; -/// Set the number, message and description of the last error -void setInetError(const char* description); - - -/** - * This class represents an Internet Protocol (IP) address. - * @author Pascal Charest pascal.charest@crc.ca - */ -class InetAddress { - public: - InetAddress(int port = 0, const char* name = NULL); - InetAddress(const InetAddress &addr); - ~InetAddress(); - - sockaddr *getAddress(); - const char *getHostAddress(); - int getPort(); - int setAddress(const std::string& name); - void setPort(int port); - bool isMulticastAddress(); - - private: - sockaddr_in addr; -}; - - -#endif diff --git a/lib/Socket.cpp b/lib/Socket.cpp new file mode 100644 index 0000000..cd70a8e --- /dev/null +++ b/lib/Socket.cpp @@ -0,0 +1,898 @@ +/* + Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the + Queen in Right of Canada (Communications Research Center Canada) + + Copyright (C) 2019 + Matthias P. Braendli, matthias.braendli@mpb.li + + http://www.opendigitalradio.org + */ +/* + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. +*/ + +#include "Socket.h" + +#include <iostream> +#include <cstdio> +#include <cstring> +#include <cerrno> +#include <fcntl.h> +#include <poll.h> + +namespace Socket { + +using namespace std; + +void InetAddress::resolveUdpDestination(const std::string& destination, int port) +{ + char service[NI_MAXSERV]; + snprintf(service, NI_MAXSERV-1, "%d", port); + + struct addrinfo hints; + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */ + hints.ai_flags = 0; + hints.ai_protocol = 0; + + struct addrinfo *result, *rp; + int s = getaddrinfo(destination.c_str(), service, &hints, &result); + if (s != 0) { + throw runtime_error(string("getaddrinfo failed: ") + gai_strerror(s)); + } + + for (rp = result; rp != nullptr; rp = rp->ai_next) { + // Take the first result + memcpy(&addr, rp->ai_addr, rp->ai_addrlen); + break; + } + + freeaddrinfo(result); + + if (rp == nullptr) { + throw runtime_error("Could not resolve"); + } +} + +UDPPacket::UDPPacket() { } + +UDPPacket::UDPPacket(size_t initSize) : + buffer(initSize) +{ } + + +UDPSocket::UDPSocket() : + m_sock(INVALID_SOCKET) +{ + reinit(0, ""); +} + +UDPSocket::UDPSocket(int port) : + m_sock(INVALID_SOCKET) +{ + reinit(port, ""); +} + +UDPSocket::UDPSocket(int port, const std::string& name) : + m_sock(INVALID_SOCKET) +{ + reinit(port, name); +} + + +void UDPSocket::setBlocking(bool block) +{ + int res = fcntl(m_sock, F_SETFL, block ? 0 : O_NONBLOCK); + if (res == -1) { + throw runtime_error(string("Can't change blocking state of socket: ") + strerror(errno)); + } +} + +void UDPSocket::reinit(int port) +{ + return reinit(port, ""); +} + +void UDPSocket::reinit(int port, const std::string& name) +{ + if (m_sock != INVALID_SOCKET) { + ::close(m_sock); + } + + if (port == 0) { + // No need to bind to a given port, creating the + // socket is enough + m_sock = ::socket(AF_INET, SOCK_DGRAM, 0); + return; + } + + char service[NI_MAXSERV]; + snprintf(service, NI_MAXSERV-1, "%d", port); + + struct addrinfo hints; + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */ + hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */ + hints.ai_protocol = 0; /* Any protocol */ + hints.ai_canonname = nullptr; + hints.ai_addr = nullptr; + hints.ai_next = nullptr; + + struct addrinfo *result, *rp; + int s = getaddrinfo(name.empty() ? nullptr : name.c_str(), + port == 0 ? nullptr : service, + &hints, &result); + if (s != 0) { + throw runtime_error(string("getaddrinfo failed: ") + gai_strerror(s)); + } + + /* getaddrinfo() returns a list of address structures. + Try each address until we successfully bind(2). + If socket(2) (or bind(2)) fails, we (close the socket + and) try the next address. */ + for (rp = result; rp != nullptr; rp = rp->ai_next) { + int sfd = ::socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol); + if (sfd == -1) { + continue; + } + + if (::bind(sfd, rp->ai_addr, rp->ai_addrlen) == 0) { + m_sock = sfd; + break; + } + + ::close(sfd); + } + + freeaddrinfo(result); + + if (rp == nullptr) { + throw runtime_error("Could not bind"); + } +} + +void UDPSocket::close() +{ + if (m_sock != INVALID_SOCKET) { + ::close(m_sock); + } + + m_sock = INVALID_SOCKET; +} + +UDPSocket::~UDPSocket() +{ + if (m_sock != INVALID_SOCKET) { + ::close(m_sock); + } +} + + +UDPPacket UDPSocket::receive(size_t max_size) +{ + UDPPacket packet(max_size); + socklen_t addrSize; + addrSize = sizeof(*packet.address.as_sockaddr()); + ssize_t ret = recvfrom(m_sock, + packet.buffer.data(), + packet.buffer.size(), + 0, + packet.address.as_sockaddr(), + &addrSize); + + if (ret == SOCKET_ERROR) { + packet.buffer.resize(0); + + // This suppresses the -Wlogical-op warning +#if EAGAIN == EWOULDBLOCK + if (errno == EAGAIN) { +#else + if (errno == EAGAIN or errno == EWOULDBLOCK) { +#endif + return 0; + } + throw runtime_error(string("Can't receive data: ") + strerror(errno)); + } + + packet.buffer.resize(ret); + return packet; +} + +void UDPSocket::send(UDPPacket& packet) +{ + const int ret = sendto(m_sock, packet.buffer.data(), packet.buffer.size(), 0, + packet.address.as_sockaddr(), sizeof(*packet.address.as_sockaddr())); + if (ret == SOCKET_ERROR && errno != ECONNREFUSED) { + throw runtime_error(string("Can't send UDP packet: ") + strerror(errno)); + } +} + + +void UDPSocket::send(const std::vector<uint8_t>& data, InetAddress destination) +{ + const int ret = sendto(m_sock, data.data(), data.size(), 0, + destination.as_sockaddr(), sizeof(*destination.as_sockaddr())); + if (ret == SOCKET_ERROR && errno != ECONNREFUSED) { + throw runtime_error(string("Can't send UDP packet: ") + strerror(errno)); + } +} + +void UDPSocket::joinGroup(const char* groupname, const char* if_addr) +{ + ip_mreqn group; + if ((group.imr_multiaddr.s_addr = inet_addr(groupname)) == INADDR_NONE) { + throw runtime_error("Cannot convert multicast group name"); + } + if (!IN_MULTICAST(ntohl(group.imr_multiaddr.s_addr))) { + throw runtime_error("Group name is not a multicast address"); + } + + if (if_addr) { + group.imr_address.s_addr = inet_addr(if_addr); + } + else { + group.imr_address.s_addr = htons(INADDR_ANY); + } + group.imr_ifindex = 0; + if (setsockopt(m_sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &group, sizeof(group)) + == SOCKET_ERROR) { + throw runtime_error(string("Can't join multicast group") + strerror(errno)); + } +} + +void UDPSocket::setMulticastSource(const char* source_addr) +{ + struct in_addr addr; + if (inet_aton(source_addr, &addr) == 0) { + throw runtime_error(string("Can't parse source address") + strerror(errno)); + } + + if (setsockopt(m_sock, IPPROTO_IP, IP_MULTICAST_IF, &addr, sizeof(addr)) + == SOCKET_ERROR) { + throw runtime_error(string("Can't set source address") + strerror(errno)); + } +} + +void UDPSocket::setMulticastTTL(int ttl) +{ + if (setsockopt(m_sock, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) + == SOCKET_ERROR) { + throw runtime_error(string("Can't set multicast ttl") + strerror(errno)); + } +} + +UDPReceiver::UDPReceiver() { } + +UDPReceiver::~UDPReceiver() { + m_stop = true; + m_sock.close(); + if (m_thread.joinable()) { + m_thread.join(); + } +} + +void UDPReceiver::start(int port, const string& bindto, const string& mcastaddr, size_t max_packets_queued) { + m_port = port; + m_bindto = bindto; + m_mcastaddr = mcastaddr; + m_max_packets_queued = max_packets_queued; + m_thread = std::thread(&UDPReceiver::m_run, this); +} + +std::vector<uint8_t> UDPReceiver::get_packet_buffer() +{ + if (m_stop) { + throw runtime_error("UDP Receiver not running"); + } + + UDPPacket p; + m_packets.wait_and_pop(p); + + return p.buffer; +} + +void UDPReceiver::m_run() +{ + // Ensure that stop is set to true in case of exception or return + struct SetStopOnDestruct { + SetStopOnDestruct(atomic<bool>& stop) : m_stop(stop) {} + ~SetStopOnDestruct() { m_stop = true; } + private: atomic<bool>& m_stop; + } autoSetStop(m_stop); + + if (IN_MULTICAST(ntohl(inet_addr(m_mcastaddr.c_str())))) { + m_sock.reinit(m_port, m_mcastaddr); + m_sock.setMulticastSource(m_bindto.c_str()); + m_sock.joinGroup(m_mcastaddr.c_str(), m_bindto.c_str()); + } + else { + m_sock.reinit(m_port, m_bindto); + } + + while (not m_stop) { + constexpr size_t packsize = 8192; + try { + auto packet = m_sock.receive(packsize); + if (packet.buffer.size() == packsize) { + // TODO replace fprintf + fprintf(stderr, "Warning, possible UDP truncation\n"); + } + + // If this blocks, the UDP socket will lose incoming packets + m_packets.push_wait_if_full(packet, m_max_packets_queued); + } + catch (const std::runtime_error& e) { + // TODO replace fprintf + // TODO handle intr + fprintf(stderr, "Socket error: %s\n", e.what()); + m_stop = true; + } + } +} + + +TCPSocket::TCPSocket() +{ +} + +TCPSocket::~TCPSocket() +{ + if (m_sock != -1) { + ::close(m_sock); + } +} + +TCPSocket::TCPSocket(TCPSocket&& other) : + m_sock(other.m_sock), + m_remote_address(move(other.m_remote_address)) +{ + if (other.m_sock != -1) { + other.m_sock = -1; + } +} + +TCPSocket& TCPSocket::operator=(TCPSocket&& other) +{ + swap(m_remote_address, other.m_remote_address); + + m_sock = other.m_sock; + if (other.m_sock != -1) { + other.m_sock = -1; + } + + return *this; +} + +bool TCPSocket::valid() const +{ + return m_sock != -1; +} + +void TCPSocket::connect(const std::string& hostname, int port) +{ + if (m_sock != INVALID_SOCKET) { + throw std::logic_error("You may only connect an invalid TCPSocket"); + } + + char service[NI_MAXSERV]; + snprintf(service, NI_MAXSERV-1, "%d", port); + + /* Obtain address(es) matching host/port */ + struct addrinfo hints; + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags = 0; + hints.ai_protocol = 0; + + struct addrinfo *result, *rp; + int s = getaddrinfo(hostname.c_str(), service, &hints, &result); + if (s != 0) { + throw runtime_error(string("getaddrinfo failed: ") + gai_strerror(s)); + } + + /* getaddrinfo() returns a list of address structures. + Try each address until we successfully connect(2). + If socket(2) (or connect(2)) fails, we (close the socket + and) try the next address. */ + + for (rp = result; rp != nullptr; rp = rp->ai_next) { + int sfd = ::socket(rp->ai_family, rp->ai_socktype, + rp->ai_protocol); + if (sfd == -1) + continue; + + int ret = ::connect(sfd, rp->ai_addr, rp->ai_addrlen); + if (ret != -1 or (ret == -1 and errno == EINPROGRESS)) { + // As the TCPClient could set the socket to nonblocking, we + // must handle EINPROGRESS here + m_sock = sfd; + break; + } + + ::close(sfd); + } + + if (m_sock != INVALID_SOCKET) { +#if defined(HAVE_SO_NOSIGPIPE) + int val = 1; + if (setsockopt(m_sock, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof(val)) + == SOCKET_ERROR) { + throw std::runtime_error("Can't set SO_NOSIGPIPE"); + } +#endif + } + + freeaddrinfo(result); /* No longer needed */ + + if (rp == nullptr) { + throw runtime_error("Could not connect"); + } + +} + +void TCPSocket::listen(int port, const string& name) +{ + if (m_sock != INVALID_SOCKET) { + throw std::logic_error("You may only listen with an invalid TCPSocket"); + } + + char service[NI_MAXSERV]; + snprintf(service, NI_MAXSERV-1, "%d", port); + + struct addrinfo hints; + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */ + hints.ai_protocol = 0; + hints.ai_canonname = nullptr; + hints.ai_addr = nullptr; + hints.ai_next = nullptr; + + struct addrinfo *result, *rp; + int s = getaddrinfo(name.empty() ? nullptr : name.c_str(), service, &hints, &result); + if (s != 0) { + throw runtime_error(string("getaddrinfo failed: ") + gai_strerror(s)); + } + + /* getaddrinfo() returns a list of address structures. + Try each address until we successfully bind(2). + If socket(2) (or bind(2)) fails, we (close the socket + and) try the next address. */ + for (rp = result; rp != nullptr; rp = rp->ai_next) { + int sfd = ::socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol); + if (sfd == -1) { + continue; + } + + if (::bind(sfd, rp->ai_addr, rp->ai_addrlen) == 0) { + m_sock = sfd; + break; + } + + ::close(sfd); + } + + freeaddrinfo(result); + + if (m_sock != INVALID_SOCKET) { +#if defined(HAVE_SO_NOSIGPIPE) + int val = 1; + if (setsockopt(m_sock, SOL_SOCKET, SO_NOSIGPIPE, + &val, sizeof(val)) < 0) { + throw std::runtime_error("Can't set SO_NOSIGPIPE"); + } +#endif + + int ret = ::listen(m_sock, 0); + if (ret == -1) { + throw std::runtime_error(string("Could not listen: ") + strerror(errno)); + } + } + + if (rp == nullptr) { + throw runtime_error("Could not bind"); + } +} + +void TCPSocket::close() +{ + ::close(m_sock); + m_sock = -1; +} + +TCPSocket TCPSocket::accept(int timeout_ms) +{ + if (timeout_ms == 0) { + InetAddress remote_addr; + socklen_t client_len = sizeof(remote_addr.addr); + int sockfd = ::accept(m_sock, remote_addr.as_sockaddr(), &client_len); + TCPSocket s(sockfd, remote_addr); + return s; + } + else { + struct pollfd fds[1]; + fds[0].fd = m_sock; + fds[0].events = POLLIN; + + int retval = poll(fds, 1, timeout_ms); + + if (retval == -1) { + std::string errstr(strerror(errno)); + throw std::runtime_error("TCP Socket accept error: " + errstr); + } + else if (retval > 0) { + InetAddress remote_addr; + socklen_t client_len = sizeof(remote_addr.addr); + int sockfd = ::accept(m_sock, remote_addr.as_sockaddr(), &client_len); + TCPSocket s(sockfd, remote_addr); + return s; + } + else { + TCPSocket s(-1); + return s; + } + } +} + +ssize_t TCPSocket::sendall(const void *buffer, size_t buflen) +{ + uint8_t *buf = (uint8_t*)buffer; + while (buflen > 0) { + /* On Linux, the MSG_NOSIGNAL flag ensures that the process + * would not receive a SIGPIPE and die. + * Other systems have SO_NOSIGPIPE set on the socket for the + * same effect. */ +#if defined(HAVE_MSG_NOSIGNAL) + const int flags = MSG_NOSIGNAL; +#else + const int flags = 0; +#endif + ssize_t sent = ::send(m_sock, buf, buflen, flags); + if (sent < 0) { + return -1; + } + else { + buf += sent; + buflen -= sent; + } + } + return buflen; +} + +ssize_t TCPSocket::send(const void* data, size_t size, int timeout_ms) +{ + if (timeout_ms) { + struct pollfd fds[1]; + fds[0].fd = m_sock; + fds[0].events = POLLOUT; + + const int retval = poll(fds, 1, timeout_ms); + + if (retval == -1) { + throw std::runtime_error(string("TCP Socket send error on poll(): ") + strerror(errno)); + } + else if (retval == 0) { + // Timed out + return 0; + } + } + + /* On Linux, the MSG_NOSIGNAL flag ensures that the process would not + * receive a SIGPIPE and die. + * Other systems have SO_NOSIGPIPE set on the socket for the same effect. */ +#if defined(HAVE_MSG_NOSIGNAL) + const int flags = MSG_NOSIGNAL; +#else + const int flags = 0; +#endif + const ssize_t ret = ::send(m_sock, (const char*)data, size, flags); + + if (ret == SOCKET_ERROR) { + throw std::runtime_error(string("TCP Socket send error: ") + strerror(errno)); + } + return ret; +} + +ssize_t TCPSocket::recv(void *buffer, size_t length, int flags) +{ + ssize_t ret = ::recv(m_sock, buffer, length, flags); + if (ret == -1) { + std::string errstr(strerror(errno)); + throw std::runtime_error("TCP receive error: " + errstr); + } + return ret; +} + +ssize_t TCPSocket::recv(void *buffer, size_t length, int flags, int timeout_ms) +{ + struct pollfd fds[1]; + fds[0].fd = m_sock; + fds[0].events = POLLIN; + + int retval = poll(fds, 1, timeout_ms); + + if (retval == -1 and errno == EINTR) { + throw Interrupted(); + } + else if (retval == -1) { + std::string errstr(strerror(errno)); + throw std::runtime_error("TCP receive with poll() error: " + errstr); + } + else if (retval > 0 and (fds[0].revents | POLLIN)) { + ssize_t ret = ::recv(m_sock, buffer, length, flags); + if (ret == -1) { + if (errno == ECONNREFUSED) { + return 0; + } + std::string errstr(strerror(errno)); + throw std::runtime_error("TCP receive after poll() error: " + errstr); + } + return ret; + } + else { + throw Timeout(); + } +} + +TCPSocket::TCPSocket(int sockfd) : + m_sock(sockfd), + m_remote_address() +{ } + +TCPSocket::TCPSocket(int sockfd, InetAddress remote_address) : + m_sock(sockfd), + m_remote_address(remote_address) +{ } + +void TCPClient::connect(const std::string& hostname, int port) +{ + m_hostname = hostname; + m_port = port; + reconnect(); +} + +ssize_t TCPClient::recv(void *buffer, size_t length, int flags, int timeout_ms) +{ + try { + ssize_t ret = m_sock.recv(buffer, length, flags, timeout_ms); + + if (ret == 0) { + m_sock.close(); + + TCPSocket newsock; + m_sock = std::move(newsock); + reconnect(); + } + + return ret; + } + catch (const TCPSocket::Interrupted&) { + return -1; + } + catch (const TCPSocket::Timeout&) { + return 0; + } + + return 0; +} + +void TCPClient::reconnect() +{ + int flags = fcntl(m_sock.m_sock, F_GETFL); + if (fcntl(m_sock.m_sock, F_SETFL, flags | O_NONBLOCK) == -1) { + std::string errstr(strerror(errno)); + throw std::runtime_error("TCP: Could not set O_NONBLOCK: " + errstr); + } + + m_sock.connect(m_hostname, m_port); +} + +TCPConnection::TCPConnection(TCPSocket&& sock) : + queue(), + m_running(true), + m_sender_thread(), + m_sock(move(sock)) +{ +#if MISSING_OWN_ADDR + auto own_addr = m_sock.getOwnAddress(); + auto addr = m_sock.getRemoteAddress(); + etiLog.level(debug) << "New TCP Connection on port " << + own_addr.getPort() << " from " << + addr.getHostAddress() << ":" << addr.getPort(); +#endif + m_sender_thread = std::thread(&TCPConnection::process, this); +} + +TCPConnection::~TCPConnection() +{ + m_running = false; + vector<uint8_t> termination_marker; + queue.push(termination_marker); + m_sender_thread.join(); +} + +void TCPConnection::process() +{ + while (m_running) { + vector<uint8_t> data; + queue.wait_and_pop(data); + + if (data.empty()) { + // empty vector is the termination marker + m_running = false; + break; + } + + try { + ssize_t remaining = data.size(); + const uint8_t *buf = reinterpret_cast<const uint8_t*>(data.data()); + const int timeout_ms = 10; // Less than one ETI frame + + while (m_running and remaining > 0) { + const ssize_t sent = m_sock.send(buf, remaining, timeout_ms); + if (sent < 0 or sent > remaining) { + throw std::logic_error("Invalid TCPSocket::send() return value"); + } + remaining -= sent; + buf += sent; + } + } + catch (const std::runtime_error& e) { + m_running = false; + } + } + +#if MISSING_OWN_ADDR + auto own_addr = m_sock.getOwnAddress(); + auto addr = m_sock.getRemoteAddress(); + etiLog.level(debug) << "Dropping TCP Connection on port " << + own_addr.getPort() << " from " << + addr.getHostAddress() << ":" << addr.getPort(); +#endif +} + + +TCPDataDispatcher::TCPDataDispatcher(size_t max_queue_size) : + m_max_queue_size(max_queue_size) +{ +} + +TCPDataDispatcher::~TCPDataDispatcher() +{ + m_running = false; + m_connections.clear(); + m_listener_socket.close(); + if (m_listener_thread.joinable()) { + m_listener_thread.join(); + } +} + +void TCPDataDispatcher::start(int port, const string& address) +{ + m_listener_socket.listen(port, address); + + m_running = true; + m_listener_thread = std::thread(&TCPDataDispatcher::process, this); +} + +void TCPDataDispatcher::write(const vector<uint8_t>& data) +{ + if (not m_running) { + throw runtime_error(m_exception_data); + } + + for (auto& connection : m_connections) { + connection.queue.push(data); + } + + m_connections.remove_if( + [&](const TCPConnection& conn){ return conn.queue.size() > m_max_queue_size; }); +} + +void TCPDataDispatcher::process() +{ + try { + const int timeout_ms = 1000; + + while (m_running) { + // Add a new TCPConnection to the list, constructing it from the client socket + auto sock = m_listener_socket.accept(timeout_ms); + if (sock.valid()) { + m_connections.emplace(m_connections.begin(), move(sock)); + } + } + } + catch (const std::runtime_error& e) { + m_exception_data = string("TCPDataDispatcher error: ") + e.what(); + m_running = false; + } +} + +TCPReceiveServer::TCPReceiveServer(size_t blocksize) : + m_blocksize(blocksize) +{ +} + +void TCPReceiveServer::start(int listen_port, const std::string& address) +{ + m_listener_socket.listen(listen_port, address); + + m_running = true; + m_listener_thread = std::thread(&TCPReceiveServer::process, this); +} + +TCPReceiveServer::~TCPReceiveServer() +{ + m_running = false; + if (m_listener_thread.joinable()) { + m_listener_thread.join(); + } +} + +vector<uint8_t> TCPReceiveServer::receive() +{ + vector<uint8_t> buffer; + m_queue.try_pop(buffer); + + // we can ignore try_pop()'s return value, because + // if it is unsuccessful the buffer is not touched. + return buffer; +} + +void TCPReceiveServer::process() +{ + constexpr int timeout_ms = 1000; + constexpr int disconnect_timeout_ms = 10000; + constexpr int max_num_timeouts = disconnect_timeout_ms / timeout_ms; + + while (m_running) { + auto sock = m_listener_socket.accept(timeout_ms); + + int num_timeouts = 0; + + while (m_running and sock.valid()) { + try { + vector<uint8_t> buf(m_blocksize); + ssize_t r = sock.recv(buf.data(), buf.size(), 0, timeout_ms); + if (r < 0) { + throw logic_error("Invalid recv return value"); + } + else if (r == 0) { + sock.close(); + break; + } + else { + buf.resize(r); + m_queue.push(move(buf)); + } + } + catch (const TCPSocket::Interrupted&) { + break; + } + catch (const TCPSocket::Timeout&) { + num_timeouts++; + } + + if (num_timeouts > max_num_timeouts) { + sock.close(); + } + } + } +} + +} diff --git a/lib/Socket.h b/lib/Socket.h new file mode 100644 index 0000000..8bb7fe1 --- /dev/null +++ b/lib/Socket.h @@ -0,0 +1,294 @@ +/* + Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the + Queen in Right of Canada (Communications Research Center Canada) + + Copyright (C) 2019 + Matthias P. Braendli, matthias.braendli@mpb.li + + http://www.opendigitalradio.org + */ +/* + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. +*/ + +#pragma once + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "ThreadsafeQueue.h" +#include <cstdlib> +#include <iostream> +#include <vector> +#include <atomic> +#include <thread> +#include <list> + +#include <sys/socket.h> +#include <netinet/in.h> +#include <unistd.h> +#include <netdb.h> +#include <arpa/inet.h> +#include <pthread.h> +#define SOCKET int +#define INVALID_SOCKET -1 +#define SOCKET_ERROR -1 + + +namespace Socket { + +struct InetAddress { + struct sockaddr_storage addr; + + struct sockaddr *as_sockaddr() { return reinterpret_cast<sockaddr*>(&addr); }; + + void resolveUdpDestination(const std::string& destination, int port); +}; + +/** This class represents a UDP packet. + * + * A UDP packet contains a payload (sequence of bytes) and an address. For + * outgoing packets, the address is the destination address. For incoming + * packets, the address tells the user from what source the packet arrived from. + */ +class UDPPacket +{ + public: + UDPPacket(); + UDPPacket(size_t initSize); + + std::vector<uint8_t> buffer; + InetAddress address; +}; + +/** + * This class represents a socket for sending and receiving UDP packets. + * + * A UDP socket is the sending or receiving point for a packet delivery service. + * Each packet sent or received on a datagram socket is individually + * addressed and routed. Multiple packets sent from one machine to another may + * be routed differently, and may arrive in any order. + */ +class UDPSocket +{ + public: + /** Create a new socket that will not be bound to any port. To be used + * for data output. + */ + UDPSocket(); + /** Create a new socket. + * @param port The port number on which the socket will be bound + */ + UDPSocket(int port); + /** Create a new socket. + * @param port The port number on which the socket will be bound + * @param name The IP address on which the socket will be bound. + * It is used to bind the socket on a specific interface if + * the computer have many NICs. + */ + UDPSocket(int port, const std::string& name); + ~UDPSocket(); + UDPSocket(const UDPSocket& other) = delete; + const UDPSocket& operator=(const UDPSocket& other) = delete; + + /** Close the already open socket, and create a new one. Throws a runtime_error on error. */ + void reinit(int port); + void reinit(int port, const std::string& name); + + void close(void); + void send(UDPPacket& packet); + void send(const std::vector<uint8_t>& data, InetAddress destination); + UDPPacket receive(size_t max_size); + void joinGroup(const char* groupname, const char* if_addr = nullptr); + void setMulticastSource(const char* source_addr); + void setMulticastTTL(int ttl); + + /** Set blocking mode. By default, the socket is blocking. + * throws a runtime_error on error. + */ + void setBlocking(bool block); + + protected: + SOCKET m_sock; +}; + +/* Threaded UDP receiver */ +class UDPReceiver { + public: + UDPReceiver(); + ~UDPReceiver(); + UDPReceiver(const UDPReceiver&) = delete; + UDPReceiver operator=(const UDPReceiver&) = delete; + + // Start the receiver in a separate thread + void start(int port, const std::string& bindto, const std::string& mcastaddr, size_t max_packets_queued); + + // Get the data contained in a UDP packet, blocks if none available + // In case of error, throws a runtime_error + std::vector<uint8_t> get_packet_buffer(void); + + private: + void m_run(void); + + int m_port = 0; + std::string m_bindto; + std::string m_mcastaddr; + size_t m_max_packets_queued = 1; + std::thread m_thread; + std::atomic<bool> m_stop = ATOMIC_VAR_INIT(false); + ThreadsafeQueue<UDPPacket> m_packets; + UDPSocket m_sock; +}; + +class TCPSocket { + public: + TCPSocket(); + ~TCPSocket(); + TCPSocket(const TCPSocket& other) = delete; + TCPSocket& operator=(const TCPSocket& other) = delete; + TCPSocket(TCPSocket&& other); + TCPSocket& operator=(TCPSocket&& other); + + bool valid(void) const; + void connect(const std::string& hostname, int port); + void listen(int port, const std::string& name); + void close(void); + + /* throws a runtime_error on failure, an invalid socket on timeout */ + TCPSocket accept(int timeout_ms); + + /* returns -1 on error, doesn't work on nonblocking sockets */ + ssize_t sendall(const void *buffer, size_t buflen); + + /** Send data over the TCP connection. + * @param data The buffer that will be sent. + * @param size Number of bytes to send. + * @param timeout_ms number of milliseconds before timeout, or 0 for infinite timeout + * return number of bytes sent, 0 on timeout, or throws runtime_error. + */ + ssize_t send(const void* data, size_t size, int timeout_ms=0); + + /* Returns number of bytes read, 0 on disconnect. Throws a + * runtime_error on error */ + ssize_t recv(void *buffer, size_t length, int flags); + + class Timeout {}; + class Interrupted {}; + /* Returns number of bytes read, 0 on disconnect or refused connection. + * Throws a Timeout on timeout, Interrupted on EINTR, a runtime_error + * on error + */ + ssize_t recv(void *buffer, size_t length, int flags, int timeout_ms); + + private: + explicit TCPSocket(int sockfd); + explicit TCPSocket(int sockfd, InetAddress remote_address); + SOCKET m_sock = -1; + + InetAddress m_remote_address; + + friend class TCPClient; +}; + +/* Implements a TCP receiver that auto-reconnects on errors */ +class TCPClient { + public: + void connect(const std::string& hostname, int port); + + /* Returns numer of bytes read, 0 on auto-reconnect, -1 + * on interruption. + * Throws a runtime_error on error */ + ssize_t recv(void *buffer, size_t length, int flags, int timeout_ms); + + private: + void reconnect(void); + TCPSocket m_sock; + std::string m_hostname; + int m_port; +}; + +/* Helper class for TCPDataDispatcher, contains a queue of pending data and + * a sender thread. */ +class TCPConnection +{ + public: + TCPConnection(TCPSocket&& sock); + TCPConnection(const TCPConnection&) = delete; + TCPConnection& operator=(const TCPConnection&) = delete; + ~TCPConnection(); + + ThreadsafeQueue<std::vector<uint8_t> > queue; + + private: + std::atomic<bool> m_running; + std::thread m_sender_thread; + TCPSocket m_sock; + + void process(void); +}; + +/* Send a TCP stream to several destinations, and automatically disconnect destinations + * whose buffer overflows. + */ +class TCPDataDispatcher +{ + public: + TCPDataDispatcher(size_t max_queue_size); + ~TCPDataDispatcher(); + TCPDataDispatcher(const TCPDataDispatcher&) = delete; + TCPDataDispatcher& operator=(const TCPDataDispatcher&) = delete; + + void start(int port, const std::string& address); + void write(const std::vector<uint8_t>& data); + + private: + void process(); + + size_t m_max_queue_size; + + std::atomic<bool> m_running; + std::string m_exception_data; + std::thread m_listener_thread; + TCPSocket m_listener_socket; + std::list<TCPConnection> m_connections; +}; + +/* A TCP Server to receive data, which abstracts the handling of connects and disconnects. + */ +class TCPReceiveServer { + public: + TCPReceiveServer(size_t blocksize); + ~TCPReceiveServer(); + TCPReceiveServer(const TCPReceiveServer&) = delete; + TCPReceiveServer& operator=(const TCPReceiveServer&) = delete; + + void start(int listen_port, const std::string& address); + + // Return a vector that contains up to blocksize bytes of data, or + // and empty vector if no data is available. + std::vector<uint8_t> receive(); + + private: + void process(); + + size_t m_blocksize = 0; + ThreadsafeQueue<std::vector<uint8_t> > m_queue; + std::atomic<bool> m_running; + std::string m_exception_data; + std::thread m_listener_thread; + TCPSocket m_listener_socket; +}; + +} diff --git a/lib/ThreadsafeQueue.h b/lib/ThreadsafeQueue.h new file mode 100644 index 0000000..62f4c96 --- /dev/null +++ b/lib/ThreadsafeQueue.h @@ -0,0 +1,176 @@ +/* + Copyright (C) 2007, 2008, 2009, 2010, 2011 Her Majesty the Queen in + Right of Canada (Communications Research Center Canada) + + Copyright (C) 2018 + Matthias P. Braendli, matthias.braendli@mpb.li + + An implementation for a threadsafe queue, depends on C++11 + + When creating a ThreadsafeQueue, one can specify the minimal number + of elements it must contain before it is possible to take one + element out. + */ +/* + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#pragma once + +#include <mutex> +#include <condition_variable> +#include <queue> +#include <utility> + +/* This queue is meant to be used by two threads. One producer + * that pushes elements into the queue, and one consumer that + * retrieves the elements. + * + * The queue can make the consumer block until an element + * is available, or a wakeup requested. + */ + +/* Class thrown by blocking pop to tell the consumer + * that there's a wakeup requested. */ +class ThreadsafeQueueWakeup {}; + +template<typename T> +class ThreadsafeQueue +{ +public: + /* Push one element into the queue, and notify another thread that + * might be waiting. + * + * returns the new queue size. + */ + size_t push(T const& val) + { + std::unique_lock<std::mutex> lock(the_mutex); + the_queue.push(val); + size_t queue_size = the_queue.size(); + lock.unlock(); + + the_rx_notification.notify_one(); + + return queue_size; + } + + size_t push(T&& val) + { + std::unique_lock<std::mutex> lock(the_mutex); + the_queue.emplace(std::move(val)); + size_t queue_size = the_queue.size(); + lock.unlock(); + + the_rx_notification.notify_one(); + + return queue_size; + } + + /* Push one element into the queue, but wait until the + * queue size goes below the threshold. + * + * Notify waiting thread. + * + * returns the new queue size. + */ + size_t push_wait_if_full(T const& val, size_t threshold) + { + std::unique_lock<std::mutex> lock(the_mutex); + while (the_queue.size() >= threshold) { + the_tx_notification.wait(lock); + } + the_queue.push(val); + size_t queue_size = the_queue.size(); + lock.unlock(); + + the_rx_notification.notify_one(); + + return queue_size; + } + + /* Trigger a wakeup event on a blocking consumer, which + * will receive a ThreadsafeQueueWakeup exception. + */ + void trigger_wakeup(void) + { + std::unique_lock<std::mutex> lock(the_mutex); + wakeup_requested = true; + lock.unlock(); + the_rx_notification.notify_one(); + } + + /* Send a notification for the receiver thread */ + void notify(void) + { + the_rx_notification.notify_one(); + } + + bool empty() const + { + std::unique_lock<std::mutex> lock(the_mutex); + return the_queue.empty(); + } + + size_t size() const + { + std::unique_lock<std::mutex> lock(the_mutex); + return the_queue.size(); + } + + bool try_pop(T& popped_value) + { + std::unique_lock<std::mutex> lock(the_mutex); + if (the_queue.empty()) { + return false; + } + + popped_value = the_queue.front(); + the_queue.pop(); + + lock.unlock(); + the_tx_notification.notify_one(); + + return true; + } + + void wait_and_pop(T& popped_value, size_t prebuffering = 1) + { + std::unique_lock<std::mutex> lock(the_mutex); + while (the_queue.size() < prebuffering and + not wakeup_requested) { + the_rx_notification.wait(lock); + } + + if (wakeup_requested) { + wakeup_requested = false; + throw ThreadsafeQueueWakeup(); + } + else { + std::swap(popped_value, the_queue.front()); + the_queue.pop(); + + lock.unlock(); + the_tx_notification.notify_one(); + } + } + +private: + std::queue<T> the_queue; + mutable std::mutex the_mutex; + std::condition_variable the_rx_notification; + std::condition_variable the_tx_notification; + bool wakeup_requested = false; +}; + diff --git a/lib/UdpSocket.cpp b/lib/UdpSocket.cpp deleted file mode 100644 index 345b971..0000000 --- a/lib/UdpSocket.cpp +++ /dev/null @@ -1,349 +0,0 @@ -/* - Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the - Queen in Right of Canada (Communications Research Center Canada) - - Copyright (C) 2017 - Matthias P. Braendli, matthias.braendli@mpb.li - - http://www.opendigitalradio.org - */ -/* - This file is part of ODR-DabMux. - - ODR-DabMux is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as - published by the Free Software Foundation, either version 3 of the - License, or (at your option) any later version. - - ODR-DabMux is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "UdpSocket.h" -#include "Utils.h" - -#include <iostream> -#include <stdio.h> -#include <errno.h> -#include <fcntl.h> -#include <string.h> - -using namespace std; - -UdpSocket::UdpSocket() : - listenSocket(INVALID_SOCKET) -{ - reinit(0, ""); -} - -UdpSocket::UdpSocket(int port) : - listenSocket(INVALID_SOCKET) -{ - reinit(port, ""); -} - -UdpSocket::UdpSocket(int port, const std::string& name) : - listenSocket(INVALID_SOCKET) -{ - reinit(port, name); -} - - -int UdpSocket::setBlocking(bool block) -{ - int res; - if (block) - res = fcntl(listenSocket, F_SETFL, 0); - else - res = fcntl(listenSocket, F_SETFL, O_NONBLOCK); - if (res == SOCKET_ERROR) { - setInetError("Can't change blocking state of socket"); - return -1; - } - return 0; -} - -int UdpSocket::reinit(int port, const std::string& name) -{ - if (listenSocket != INVALID_SOCKET) { - ::close(listenSocket); - } - - if ((listenSocket = socket(PF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET) { - setInetError("Can't create socket"); - return -1; - } - reuseopt_t reuse = 1; - if (setsockopt(listenSocket, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) - == SOCKET_ERROR) { - setInetError("Can't reuse address"); - return -1; - } - - if (port) { - address.setAddress(name); - address.setPort(port); - - if (::bind(listenSocket, address.getAddress(), sizeof(sockaddr_in)) == SOCKET_ERROR) { - setInetError("Can't bind socket"); - ::close(listenSocket); - listenSocket = INVALID_SOCKET; - return -1; - } - } - return 0; -} - -int UdpSocket::close() -{ - if (listenSocket != INVALID_SOCKET) { - ::close(listenSocket); - } - - listenSocket = INVALID_SOCKET; - - return 0; -} - -UdpSocket::~UdpSocket() -{ - if (listenSocket != INVALID_SOCKET) { - ::close(listenSocket); - } -} - -static inline bool wait_for_recv_ready(int sock_fd, const size_t timeout_ms) -{ - //setup timeval for timeout - timeval tv; - tv.tv_sec = 0; - tv.tv_usec = timeout_ms*1000; - - //setup rset for timeout - fd_set rset; - FD_ZERO(&rset); - FD_SET(sock_fd, &rset); - - return ::select(sock_fd+1, &rset, NULL, NULL, &tv) > 0; -} - -int UdpSocket::receive(UdpPacket& packet) -{ - bool ready = wait_for_recv_ready(listenSocket, 2000); - - if (ready) { - socklen_t addrSize; - addrSize = sizeof(*packet.getAddress().getAddress()); - ssize_t ret = recvfrom(listenSocket, - packet.getData(), - packet.getSize(), - 0, - packet.getAddress().getAddress(), - &addrSize); - - if (ret == SOCKET_ERROR) { - packet.setSize(0); - if (errno == EAGAIN) { - return 0; - } - setInetError("Can't receive UDP packet"); - return -1; - } - packet.setSize(ret); - return 0; - } - else { - packet.setSize(0); - return 0; - } -} - -int UdpSocket::send(UdpPacket& packet) -{ - int ret = sendto(listenSocket, packet.getData(), packet.getSize(), 0, - packet.getAddress().getAddress(), sizeof(*packet.getAddress().getAddress())); - if (ret == SOCKET_ERROR && errno != ECONNREFUSED) { - setInetError("Can't send UDP packet"); - return -1; - } - return 0; -} - - -int UdpSocket::send(const std::vector<uint8_t>& data, InetAddress destination) -{ - int ret = sendto(listenSocket, &data[0], data.size(), 0, - destination.getAddress(), sizeof(*destination.getAddress())); - if (ret == SOCKET_ERROR && errno != ECONNREFUSED) { - setInetError("Can't send UDP packet"); - return -1; - } - return 0; -} - - -/** - * Must be called to receive data on a multicast address. - * @param groupname The multicast address to join. - * @return 0 if ok, -1 if error - */ -int UdpSocket::joinGroup(const char* groupname, const char* if_addr) -{ - ip_mreqn group; - if ((group.imr_multiaddr.s_addr = inet_addr(groupname)) == INADDR_NONE) { - setInetError(groupname); - return -1; - } - if (!IN_MULTICAST(ntohl(group.imr_multiaddr.s_addr))) { - setInetError("Not a multicast address"); - return -1; - } - group.imr_address.s_addr = inet_addr(if_addr); - group.imr_ifindex = 0; - if (setsockopt(listenSocket, IPPROTO_IP, IP_ADD_MEMBERSHIP, &group, sizeof(group)) - == SOCKET_ERROR) { - setInetError("Can't join multicast group"); - } - return 0; -} - -int UdpSocket::setMulticastTTL(int ttl) -{ - if (setsockopt(listenSocket, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) - == SOCKET_ERROR) { - setInetError("Can't set ttl"); - return -1; - } - - return 0; -} - -int UdpSocket::setMulticastSource(const char* source_addr) -{ - struct in_addr addr; - if (inet_aton(source_addr, &addr) == 0) { - setInetError("Can't parse source address"); - return -1; - } - - if (setsockopt(listenSocket, IPPROTO_IP, IP_MULTICAST_IF, &addr, sizeof(addr)) - == SOCKET_ERROR) { - setInetError("Can't set source address"); - return -1; - } - - return 0; -} - -UdpPacket::UdpPacket() { } - -UdpPacket::UdpPacket(size_t initSize) : - m_buffer(initSize) -{ } - - -void UdpPacket::setSize(size_t newSize) -{ - m_buffer.resize(newSize); -} - - -uint8_t* UdpPacket::getData() -{ - return &m_buffer[0]; -} - - -void UdpPacket::addData(const void *data, size_t size) -{ - uint8_t *d = (uint8_t*)data; - std::copy(d, d + size, std::back_inserter(m_buffer)); -} - -size_t UdpPacket::getSize() -{ - return m_buffer.size(); -} - -InetAddress UdpPacket::getAddress() -{ - return address; -} - -UdpReceiver::~UdpReceiver() { - m_stop = true; - m_sock.close(); - if (m_thread.joinable()) { - m_thread.join(); - } -} - -void UdpReceiver::start(int port, std::string& bindto, std::string& mcastaddr, size_t max_packets_queued) { - m_port = port; - m_bindto = bindto; - m_mcastaddr = mcastaddr; - m_max_packets_queued = max_packets_queued; - m_thread = std::thread(&UdpReceiver::m_run, this); -} - -std::vector<uint8_t> UdpReceiver::get_packet_buffer() -{ - if (m_stop) { - throw runtime_error("UDP Receiver not running"); - } - - UdpPacket p; - m_packets.wait_and_pop(p); - - return p.getBuffer(); -} - -void UdpReceiver::m_run() -{ - // Ensure that stop is set to true in case of exception or return - struct SetStopOnDestruct { - SetStopOnDestruct(atomic<bool>& stop) : m_stop(stop) {} - ~SetStopOnDestruct() { m_stop = true; } - private: atomic<bool>& m_stop; - } autoSetStop(m_stop); - - set_thread_name("udp_rx"); - - if (IN_MULTICAST(ntohl(inet_addr(m_mcastaddr.c_str())))) { - m_sock.reinit(m_port, m_mcastaddr); - m_sock.setMulticastSource(m_bindto.c_str()); - m_sock.joinGroup(m_mcastaddr.c_str(), m_bindto.c_str()); - } - else { - m_sock.reinit(m_port, m_bindto); - } - - const size_t packsize = 8192; - UdpPacket packet(packsize); - - while (not m_stop) { - int ret = m_sock.receive(packet); - if (ret == 0) { - if (packet.getSize() == packsize) { - // TODO replace fprintf - fprintf(stderr, "Warning, possible UDP truncation\n"); - } - - // If this blocks, the UDP socket will lose incoming packets - m_packets.push_wait_if_full(packet, m_max_packets_queued); - } - else { - if (inetErrNo != EINTR) { - // TODO replace fprintf - fprintf(stderr, "Socket error: %s\n", inetErrMsg); - } - m_stop = true; - } - } -} - diff --git a/lib/UdpSocket.h b/lib/UdpSocket.h deleted file mode 100644 index b299c82..0000000 --- a/lib/UdpSocket.h +++ /dev/null @@ -1,206 +0,0 @@ -/* - Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the - Queen in Right of Canada (Communications Research Center Canada) - - Copyright (C) 2017 - Matthias P. Braendli, matthias.braendli@mpb.li - - http://www.opendigitalradio.org - */ -/* - This file is part of ODR-DabMux. - - ODR-DabMux is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as - published by the Free Software Foundation, either version 3 of the - License, or (at your option) any later version. - - ODR-DabMux is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>. - */ - -#pragma once - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include "InetAddress.h" -#include "ThreadsafeQueue.h" -#include <sys/socket.h> -#include <netinet/in.h> -#include <unistd.h> -#include <netdb.h> -#include <arpa/inet.h> -#include <pthread.h> -#define SOCKET int -#define INVALID_SOCKET -1 -#define SOCKET_ERROR -1 -#define reuseopt_t int - -#include <stdlib.h> -#include <iostream> -#include <vector> -#include <thread> -#include <atomic> - -class UdpPacket; - - -/** - * This class represents a socket for sending and receiving UDP packets. - * - * A UDP socket is the sending or receiving point for a packet delivery service. - * Each packet sent or received on a datagram socket is individually - * addressed and routed. Multiple packets sent from one machine to another may - * be routed differently, and may arrive in any order. - */ -class UdpSocket -{ - public: - /** Create a new socket that will not be bound to any port. To be used - * for data output. - */ - UdpSocket(); - /** Create a new socket. - * @param port The port number on which the socket will be bound - */ - UdpSocket(int port); - /** Create a new socket. - * @param port The port number on which the socket will be bound - * @param name The IP address on which the socket will be bound. - * It is used to bind the socket on a specific interface if - * the computer have many NICs. - */ - UdpSocket(int port, const std::string& name); - ~UdpSocket(); - UdpSocket(const UdpSocket& other) = delete; - const UdpSocket& operator=(const UdpSocket& other) = delete; - - /** reinitialise socket. Close the already open socket, and - * create a new one - */ - int reinit(int port, const std::string& name); - - /** Close the socket - */ - int close(void); - - /** Send an UDP packet. - * @param packet The UDP packet to be sent. It includes the data and the - * destination address - * return 0 if ok, -1 if error - */ - int send(UdpPacket& packet); - - /** Send an UDP packet - * - * return 0 if ok, -1 if error - */ - int send(const std::vector<uint8_t>& data, InetAddress destination); - - /** Receive an UDP packet. - * @param packet The packet that will receive the data. The address will be set - * to the source address. - * @return 0 if ok or timeout, -1 if error - */ - int receive(UdpPacket& packet); - - int joinGroup(const char* groupname, const char *if_addr); - int setMulticastSource(const char* source_addr); - int setMulticastTTL(int ttl); - - /** Set blocking mode. By default, the socket is blocking. - * @return 0 if ok - * -1 if error - */ - int setBlocking(bool block); - - protected: - - /// The address on which the socket is bound. - InetAddress address; - /// The low-level socket used by system functions. - SOCKET listenSocket; -}; - -/** This class represents a UDP packet. - * - * A UDP packet contains a payload (sequence of bytes) and an address. For - * outgoing packets, the address is the destination address. For incoming - * packets, the address tells the user from what source the packet arrived from. - */ -class UdpPacket -{ - public: - /** Construct an empty UDP packet. - */ - UdpPacket(); - UdpPacket(size_t initSize); - - /** Give the pointer to data. - * @return The pointer - */ - uint8_t* getData(void); - - /** Append some data at the end of data buffer and adjust size. - * @param data Pointer to the data to add - * @param size Size in bytes of new data - */ - void addData(const void *data, size_t size); - - size_t getSize(void); - - /** Changes size of the data buffer size. Keeps data intact unless - * truncated. - */ - void setSize(size_t newSize); - - /** Returns the UDP address of the packet. - */ - InetAddress getAddress(void); - - const std::vector<uint8_t>& getBuffer(void) const { - return m_buffer; - } - - - private: - std::vector<uint8_t> m_buffer; - InetAddress address; -}; - -/* Threaded UDP receiver */ -class UdpReceiver { - public: - UdpReceiver() : m_port(0), m_thread(), m_stop(false), m_packets() {} - ~UdpReceiver(); - UdpReceiver(const UdpReceiver&) = delete; - UdpReceiver operator=(const UdpReceiver&) = delete; - - // Start the receiver in a separate thread - void start(int port, std::string& bindto, std::string& mcastaddr, size_t max_packets_queued); - - // Get the data contained in a UDP packet, blocks if none available - // In case of error, throws a runtime_error - std::vector<uint8_t> get_packet_buffer(void); - - private: - void m_run(void); - - int m_port; - std::string m_bindto; - std::string m_mcastaddr; - size_t m_max_packets_queued; - std::thread m_thread; - std::atomic<bool> m_stop; - ThreadsafeQueue<UdpPacket> m_packets; - UdpSocket m_sock; -}; - - |