#include <apptunoutscheduler.h>
Public Member Functions | |
virtual | ~AppTunOutScheduler () |
Protected Member Functions | |
virtual int | initializeNetwork () |
Initialize the network. | |
virtual void | additionalFD () |
This function is called from main loop if data is accessible from "additional_fd". | |
Protected Attributes | |
char * | dev |
Definition at line 40 of file apptunoutscheduler.h.
AppTunOutScheduler::~AppTunOutScheduler | ( | ) | [virtual] |
Definition at line 33 of file apptunoutscheduler.cc.
{ if (additional_fd >= 0) { #ifdef _WIN32 closesocket(additional_fd); #else close(additional_fd); #endif } }
void AppTunOutScheduler::additionalFD | ( | ) | [protected, virtual] |
This function is called from main loop if data is accessible from "additional_fd".
This FD can be set in initializeNetwork by concrete implementations.
Reimplemented from RealtimeScheduler.
Definition at line 195 of file apptunoutscheduler.cc.
{ sockaddr* from = (sockaddr*) new sockaddr_in; socklen_t addrlen = sizeof(sockaddr_in); SOCKET new_sock = accept( additional_fd, from, &addrlen ); if (new_sock == INVALID_SOCKET) { opp_warning("Error connecting to remote app"); return; } if (appConnectionLimit) { int count = 0; for (SOCKET fd = 0; fd <= maxfd; fd++) { if (fd == netw_fd) continue; if (fd == additional_fd) continue; if (FD_ISSET(fd, &all_fds)) count++; } if (count >= appConnectionLimit) { // We already have too many connections to external applications // "reject" connection #ifdef _WIN32 closesocket(new_sock); #else close(new_sock); #endif ev << "[UdpOutScheduler::additionalFD()]\n" << " Rejecting new app connection (FD: " << new_sock << ")" << endl; return; } } FD_SET(new_sock, &all_fds); if (new_sock > maxfd) { maxfd = new_sock; } // Inform app about new connection appPacketBuffer->push_back(PacketBufferEntry(0, 0, from, addrlen, PacketBufferEntry::PACKET_FD_NEW, new_sock)); sendNotificationMsg(appNotificationMsg, appModule); ev << "[UdpOutScheduler::additionalFD()]\n" << " Accepting new app connection (FD: " << new_sock << ")" << endl; }
int AppTunOutScheduler::initializeNetwork | ( | ) | [protected, virtual] |
Initialize the network.
Implements RealtimeScheduler.
Definition at line 44 of file apptunoutscheduler.cc.
{ #if defined _WIN32 || defined __APPLE__ throw cRuntimeError("TunOutSchedulter::initializeNetwork():" "TUN interface not supported on Windows/Max OS!"); return -1; #else // get app port (0 if external app is not used) int appPort = ev.getConfig()->getAsInt(CFGID_EXTERNALAPP_APP_PORT, 0); // Initialize TCP socket for App communication if desired if (appPort > 0) { struct sockaddr_in server; SOCKET sock; // Waiting for a TCP connection sock = socket(AF_INET, SOCK_STREAM, 0); if (sock == INVALID_SOCKET) { opp_error("Error creating socket"); return -1; } int on = 1; setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on)); memset(&server, 0, sizeof (server)); server.sin_family = AF_INET; server.sin_addr.s_addr = htonl(INADDR_ANY); server.sin_port = htons(appPort); if (bind( sock, (struct sockaddr*)&server, sizeof( server)) < 0) { opp_error("Error binding to app socket"); return -1; } if (listen( sock, 5 ) == -1) { opp_error("Error listening on app socket"); return -1; } // Set additional_fd so we will be called if data // (i.e. connection requests) is available at sock additional_fd = sock; FD_SET(additional_fd, &all_fds); if (additional_fd > maxfd) { maxfd = additional_fd; } } // Open UDP port if (netw_fd != INVALID_SOCKET) { // Port is already open, reuse it... FD_SET(netw_fd, &all_fds); if (netw_fd> maxfd) { maxfd = netw_fd; } } sockaddr_in addr; netw_fd = socket(AF_INET, SOCK_DGRAM, 0); memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; cModule* overlay = simulation.getModuleByPath( "SingleHostUnderlayNetwork.overlayTerminal[0].overlay"); if (overlay == NULL) { throw cRuntimeError("UdpOutScheduler::initializeNetwork(): " "Overlay module not found!"); } addr.sin_port = htons(overlay->gate("appIn")->getNextGate()-> getOwnerModule()->par("localPort").longValue()); cModule* underlayConfigurator = simulation.getModuleByPath("SingleHostUnderlayNetwork.underlayConfigurator"); if (underlayConfigurator == NULL) { throw cRuntimeError("UdpOutScheduler::initializeNetwork(): " "UnderlayConfigurator module not found!"); } if (strlen(underlayConfigurator->par("nodeIP").stringValue())) { addr.sin_addr.s_addr = htonl(IPAddress(underlayConfigurator-> par("nodeIP").stringValue()).getInt()); } else { addr.sin_addr.s_addr = htonl(INADDR_ANY); } if (bind( netw_fd, (sockaddr*)&addr, sizeof(addr)) < 0) { opp_error("Error binding to UDP socket"); return -1; } FD_SET(netw_fd, &all_fds); if (netw_fd> maxfd) { maxfd = netw_fd; } // Initialize TUN device for network communication // see /usr/src/linux/Documentation/network/tuntap.txt struct ifreq ifr; int err; dev = new char[IFNAMSIZ]; if (apptun_fd != INVALID_SOCKET) { opp_error("Already bound to application TUN device!"); return -1; } if ((apptun_fd = open("/dev/net/tun", O_RDWR)) < 0 ) { opp_warning("Error opening application tun device"); return 0; } else { ev << "[AppTunOutScheduler::initializeNetwork()]\n" << "\t Successfully opened application TUN device" << endl; } memset(&ifr, 0, sizeof(ifr)); /* Flags: IFF_TUN - TUN device (no Ethernet headers) * IFF_TAP - TAP device * * IFF_NO_PI - Do not provide packet information */ ifr.ifr_flags = IFF_TUN | IFF_NO_PI; strncpy(ifr.ifr_name, "tun%d", IFNAMSIZ); if((err = ioctl(apptun_fd, TUNSETIFF, (void *) &ifr)) < 0 ) { close(apptun_fd); opp_error("Error ioctl application tun device"); return -1; } strncpy(dev, ifr.ifr_name, IFNAMSIZ); ev << "[AppTunOutScheduler::initializeNetwork()]\n" << " Bound to device " << dev << "\n" << " Remember to bring up application TUN device with " << "ifconfig before proceeding" << endl; FD_SET(apptun_fd, &all_fds); if( apptun_fd> maxfd ) maxfd = apptun_fd; return 0; #endif }
char* AppTunOutScheduler::dev [protected] |
Definition at line 43 of file apptunoutscheduler.h.
Referenced by initializeNetwork().