diff options
Diffstat (limited to 'lib/socket/socket.cpp')
| -rw-r--r-- | lib/socket/socket.cpp | 472 |
1 files changed, 0 insertions, 472 deletions
diff --git a/lib/socket/socket.cpp b/lib/socket/socket.cpp deleted file mode 100644 index a086d95..0000000 --- a/lib/socket/socket.cpp +++ /dev/null @@ -1,472 +0,0 @@ -/* - * C++ sockets on Unix and Windows - * Copyright (C) 2002 <unknown> - * Copyright (C) 2010 Uditha Atukorala - * - * 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <socket.h> - -#ifndef WIN32 - #include <sys/types.h> // For data types - #include <sys/socket.h> // For socket(), connect(), send(), and recv() - #include <netdb.h> // For gethostbyname() - #include <arpa/inet.h> // For inet_addr() - #include <unistd.h> // For close() -#endif - -#include <cerrno> // For errno -#include <cstring> // For strerror -#include <cstdlib> // For atoi() - -using namespace std; - -namespace socketlibrary { - -#ifdef WIN32 - static bool initialized = false; -#endif - -// SocketException Code - -SocketException::SocketException(const string &message, bool inclSysMsg) throw() : userMessage(message) { - if (inclSysMsg) { - userMessage.append(": "); - userMessage.append(strerror(errno)); - } -} - -SocketException::~SocketException() throw() { -} - -const char *SocketException::what() const throw() { - return userMessage.c_str(); -} - -// Function to fill in address structure given an address and port -void fillAddr(const string &address, unsigned short port, sockaddr_in &addr) { - - memset(&addr, 0, sizeof(addr)); // Zero out address structure - addr.sin_family = AF_INET; // Internet address - - hostent *host; // Resolve name - if ((host = gethostbyname(address.c_str())) == NULL) { - // strerror() will not work for gethostbyname() and hstrerror() - // is supposedly obsolete - throw SocketException("Failed to resolve name (gethostbyname())"); - } - - addr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]); - addr.sin_port = htons(port); // Assign port in network byte order - -} - -// Socket Code - -Socket::Socket(int type, int protocol) throw(SocketException) { -#ifdef WIN32 - if (!initialized) { - WORD wVersionRequested; - WSADATA wsaData; - - wVersionRequested = MAKEWORD(2, 0); // Request WinSock v2.0 - if (WSAStartup(wVersionRequested, &wsaData) != 0) { // Load WinSock DLL - throw SocketException("Unable to load WinSock DLL"); - } - initialized = true; - } -#endif - - // Make a new socket - if ((sock = socket(PF_INET, type, protocol)) < 0) { - throw SocketException("Socket creation failed (socket())", true); - } -} - -Socket::Socket(int sock) { - this->sock = sock; -} - -Socket::~Socket() { - -#ifdef WIN32 - ::closesocket(sock); -#else - ::close(sock); -#endif - sock = -1; -} - -string Socket::getLocalAddress() throw(SocketException) { - sockaddr_in addr; - unsigned int addr_len = sizeof(addr); - - if (getsockname(sock, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) { - throw SocketException("Fetch of local address failed (getsockname())", true); - } - return inet_ntoa(addr.sin_addr); -} - -unsigned short Socket::getLocalPort() throw(SocketException) { - sockaddr_in addr; - unsigned int addr_len = sizeof(addr); - - if (getsockname(sock, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) { - throw SocketException("Fetch of local port failed (getsockname())", true); - } - return ntohs(addr.sin_port); -} - -void Socket::setLocalPort(unsigned short localPort) throw(SocketException) { - // Bind the socket to its port - sockaddr_in localAddr; - memset(&localAddr, 0, sizeof(localAddr)); - localAddr.sin_family = AF_INET; - localAddr.sin_addr.s_addr = htonl(INADDR_ANY); - localAddr.sin_port = htons(localPort); - - if (bind(sock, (sockaddr *) &localAddr, sizeof(sockaddr_in)) < 0) { - throw SocketException("Set of local port failed (bind())", true); - } -} - -void Socket::setLocalAddressAndPort(const string &localAddress, unsigned short localPort) throw(SocketException) { - // Get the address of the requested host - sockaddr_in localAddr; - fillAddr(localAddress, localPort, localAddr); - - if (bind(sock, (sockaddr *) &localAddr, sizeof(sockaddr_in)) < 0) { - throw SocketException("Set of local address and port failed (bind())", true); - } -} - -void Socket::cleanUp() throw(SocketException) { -#ifdef WIN32 - if (WSACleanup() != 0) { - throw SocketException("WSACleanup() failed"); - } -#endif -} - -unsigned short Socket::resolveService(const string &service, const string &protocol) { - - struct servent *serv; /* Structure containing service information */ - - if ((serv = getservbyname(service.c_str(), protocol.c_str())) == NULL) - return atoi(service.c_str()); /* Service is port number */ - else - return ntohs(serv->s_port); /* Found port (network byte order) by name */ - -} - -// CommunicatingSocket Code - -CommunicatingSocket::CommunicatingSocket(int type, int protocol) throw(SocketException) : Socket(type, protocol) { -} - -CommunicatingSocket::CommunicatingSocket(int newSD) : Socket(newSD) { -} - -void CommunicatingSocket::connect(const string &foreignAddress, unsigned short foreignPort) throw(SocketException) { - // Get the address of the requested host - sockaddr_in destAddr; - fillAddr(foreignAddress, foreignPort, destAddr); - - // Try to connect to the given port - if (::connect(sock, (sockaddr *) &destAddr, sizeof(destAddr)) < 0) { - throw SocketException("Connect failed (connect())", true); - } -} - -void CommunicatingSocket::send(const void *buffer, int bufferLen) throw(SocketException) { - if (::send(sock, (raw_type *) buffer, bufferLen, 0) < 0) { - throw SocketException("Send failed (send())", true); - } -} - -int CommunicatingSocket::recv(void *buffer, int bufferLen) throw(SocketException) { - int rtn; - if ((rtn = ::recv(sock, (raw_type *) buffer, bufferLen, 0)) < 0) { - throw SocketException("Received failed (recv()) for socket ", true); - } - return rtn; -} - -int CommunicatingSocket::peek(void *buffer, int bufferLen) throw(SocketException) { - int rtn; - if ((rtn = ::recv(sock, (raw_type *) buffer, bufferLen, MSG_PEEK)) < 0) { - throw SocketException("Received failed (recv()) for socket ", true); - } - return rtn; -} - -int CommunicatingSocket::readLine(char *buffer, int bufferLen, const char delimiter) throw(SocketException) { - - int n, rc; - char c; - - for (n = 1; n < bufferLen; n++) { - if ((rc = recv(&c, 1)) == 1) { - *buffer++ = c; - if (c == delimiter) { - break; - } - } else if (rc == 0) { - if (n == 1) { - return 0; // EOF, no data read - } else { - break; // EOF, read some data - } - } else { - throw SocketException("Failed to read data from socket ", true); - } - } - - *buffer = '\0'; - return n; - -} - -string CommunicatingSocket::getForeignAddress() throw(SocketException) { - sockaddr_in addr; - unsigned int addr_len = sizeof(addr); - - if (getpeername(sock, (sockaddr *) &addr,(socklen_t *) &addr_len) < 0) { - throw SocketException("Fetch of foreign address failed (getpeername())", true); - } - return inet_ntoa(addr.sin_addr); -} - -unsigned short CommunicatingSocket::getForeignPort() throw(SocketException) { - sockaddr_in addr; - unsigned int addr_len = sizeof(addr); - - if (getpeername(sock, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) { - throw SocketException("Fetch of foreign port failed (getpeername())", true); - } - return ntohs(addr.sin_port); -} - -// TCPSocket Code - -TCPSocket::TCPSocket() throw(SocketException) : CommunicatingSocket(SOCK_STREAM, IPPROTO_TCP) { -} - -TCPSocket::TCPSocket(const string &foreignAddress, unsigned short foreignPort) throw(SocketException) : CommunicatingSocket(SOCK_STREAM, IPPROTO_TCP) { - connect(foreignAddress, foreignPort); -} - -TCPSocket::TCPSocket(int newSD) : CommunicatingSocket(newSD) { -} - -// TCPServerSocket Code - -TCPServerSocket::TCPServerSocket(unsigned short localPort, int queueLen) throw(SocketException) : Socket(SOCK_STREAM, IPPROTO_TCP) { - setLocalPort(localPort); - setListen(queueLen); -} - -TCPServerSocket::TCPServerSocket(const string &localAddress, unsigned short localPort, int queueLen) throw(SocketException) : Socket(SOCK_STREAM, IPPROTO_TCP) { - setLocalAddressAndPort(localAddress, localPort); - setListen(queueLen); -} - -TCPSocket *TCPServerSocket::accept() throw(SocketException) { - int newSD; - if ((newSD = ::accept(sock, NULL, 0)) < 0) { - throw SocketException("Accept failed (accept())", true); - } - return new TCPSocket(newSD); -} - -void TCPServerSocket::setListen(int queueLen) throw(SocketException) { - if (listen(sock, queueLen) < 0) { - throw SocketException("Set listening socket failed (listen())", true); - } -} - -// TCPServerSocketM Code - -TCPServerSocketM::TCPServerSocketM(unsigned short localPort, int queueLen) throw(SocketException) : TCPServerSocket(localPort, queueLen) { - - FD_ZERO(&fds_master); // clear the master and temp sets - - FD_SET(sock, &fds_master); // Add ourself to the master set - fdmax = sock; // keep track of the biggest file descriptor, only ourself for the moment - -} - -TCPSocket *TCPServerSocketM::accept() throw(SocketException) { - - TCPSocket *newClient = TCPServerSocket::accept(); - int newSD = newClient->sock; - - FD_SET(newSD, &fds_master); // add to master set - if (newSD > fdmax) { // keep track of the max - fdmax = newSD; - } - - v_clients.push_back(newClient); - return newClient; - -} - -bool TCPServerSocketM::pendingConnections() throw (SocketException) { - - fd_set read_fds; - FD_ZERO(&read_fds); - - read_fds = fds_master; - if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) { - throw SocketException("Failed to select read fds (select())", true); - } - - if (FD_ISSET(sock, &read_fds)) { - return true; - } else { - return false; - } - -} - -int TCPServerSocketM::getWaitingClients(vector<TCPSocket *> &clients) throw (SocketException) { - - fd_set read_fds; - FD_ZERO(&read_fds); - - int cl_count = 0; - - read_fds = fds_master; - if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) { - throw SocketException("Failed to select read fds (select())", true); - } - - // resize the vector so it doesn't contain any old information - clients.resize(0); - - for(unsigned int i=0; i<v_clients.size(); i++) { - if (FD_ISSET(v_clients.at(i)->sock, &read_fds)) { // we got one!! - clients.push_back(v_clients.at(i)); - cl_count++; - } - } - - return cl_count; -} - -void TCPServerSocketM::closeClientConnection(TCPSocket * client) { - - for(unsigned int i=0; i<v_clients.size(); i++) { - if (client->sock == v_clients.at(i)->sock) { - FD_CLR(client->sock, &fds_master); - v_clients.erase(v_clients.begin() + i); - delete client; - break; - } - } - -} - - -// UDPSocket Code - -UDPSocket::UDPSocket() throw(SocketException) : CommunicatingSocket(SOCK_DGRAM, IPPROTO_UDP) { - setBroadcast(); -} - -UDPSocket::UDPSocket(unsigned short localPort) throw(SocketException) : CommunicatingSocket(SOCK_DGRAM, IPPROTO_UDP) { - setLocalPort(localPort); - setBroadcast(); -} - -UDPSocket::UDPSocket(const string &localAddress, unsigned short localPort) throw(SocketException) : CommunicatingSocket(SOCK_DGRAM, IPPROTO_UDP) { - setLocalAddressAndPort(localAddress, localPort); - setBroadcast(); -} - -void UDPSocket::setBroadcast() { - // If this fails, we'll hear about it when we try to send. This will allow - // system that cannot broadcast to continue if they don't plan to broadcast - int broadcastPermission = 1; - setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (raw_type *) &broadcastPermission, sizeof(broadcastPermission)); -} - -void UDPSocket::disconnect() throw(SocketException) { - sockaddr_in nullAddr; - memset(&nullAddr, 0, sizeof(nullAddr)); - nullAddr.sin_family = AF_UNSPEC; - - // Try to disconnect - if (::connect(sock, (sockaddr *) &nullAddr, sizeof(nullAddr)) < 0) { -#ifdef WIN32 - if (errno != WSAEAFNOSUPPORT) { -#else - if (errno != EAFNOSUPPORT) { -#endif - throw SocketException("Disconnect failed (connect())", true); - } - } -} - -void UDPSocket::sendTo(const void *buffer, int bufferLen, const string &foreignAddress, unsigned short foreignPort) throw(SocketException) { - sockaddr_in destAddr; - fillAddr(foreignAddress, foreignPort, destAddr); - - // Write out the whole buffer as a single message. - if (sendto(sock, (raw_type *) buffer, bufferLen, 0, (sockaddr *) &destAddr, sizeof(destAddr)) != bufferLen) { - throw SocketException("Send failed (sendto())", true); - } -} - -int UDPSocket::recvFrom(void *buffer, int bufferLen, string &sourceAddress, unsigned short &sourcePort) throw(SocketException) { - sockaddr_in clntAddr; - socklen_t addrLen = sizeof(clntAddr); - int rtn; - if ((rtn = recvfrom(sock, (raw_type *) buffer, bufferLen, 0, (sockaddr *) &clntAddr, (socklen_t *) &addrLen)) < 0) { - throw SocketException("Receive failed (recvfrom())", true); - } - sourceAddress = inet_ntoa(clntAddr.sin_addr); - sourcePort = ntohs(clntAddr.sin_port); - return rtn; -} - -void UDPSocket::setMulticastTTL(unsigned char multicastTTL) throw(SocketException) { - if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_TTL, (raw_type *) &multicastTTL, sizeof(multicastTTL)) < 0) { - throw SocketException("Multicast TTL set failed (setsockopt())", true); - } -} - -void UDPSocket::joinGroup(const string &multicastGroup) throw(SocketException) { - struct ip_mreq multicastRequest; - - multicastRequest.imr_multiaddr.s_addr = inet_addr(multicastGroup.c_str()); - multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY); - if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (raw_type *) &multicastRequest, sizeof(multicastRequest)) < 0) { - throw SocketException("Multicast group join failed (setsockopt())", true); - } -} - -void UDPSocket::leaveGroup(const string &multicastGroup) throw(SocketException) { - struct ip_mreq multicastRequest; - - multicastRequest.imr_multiaddr.s_addr = inet_addr(multicastGroup.c_str()); - multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY); - if (setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, (raw_type *) &multicastRequest, sizeof(multicastRequest)) < 0) { - throw SocketException("Multicast group leave failed (setsockopt())", true); - } -} - -} // End of namespace SocketLibrary |