src/vcomm/vcommunication/NetworkSink.cpp

   1 /**
   2         Aesalon, a tool to visualize a program's behaviour at run-time.
   3         Copyright (C) 2010, Aesalon Development Team.
   4
   5         Aesalon is distributed under the terms of the GNU GPLv3. For more
   6         licensing information, see the file LICENSE included with the distribution.
   7
   8         @file monitor/src/vcommunication/NetworkSink.cpp
   9
  10 */
  11
  12 #include <sys/socket.h>
  13 #include <netdb.h>
  14 #include <string.h>
  15 #include <stdio.h>
  16 #include <arpa/inet.h>
  17
  18 #include "vcommunication/NetworkSink.h"
  19 #include "common/StringTo.h"
  20 #include "common/StringToBool.h"
  21 #include "Coordinator.h"
  22
  23 #include "common/Config.h"
  24
  25 namespace Monitor {
  26 namespace VCommunication {
  27
  28 NetworkSink::NetworkSink() {
  29         openSocket();
  30
  31         sem_init(&m_accessLock, 0, 1);
  32 }
  33
  34 NetworkSink::~NetworkSink() {
  35         sem_destroy(&m_accessLock);
  36
  37         closeSocket();
  38 }
  39
  40 void NetworkSink::sinkPacket(Common::VPacket *packet) {
  41         if(m_serverFd == -1) return;
  42
  43         sem_wait(&m_accessLock);
  44
  45         for(ClientFdList::iterator i = m_clientFds.begin(); i != m_clientFds.end(); ++i) {
  46                 sendPacket(packet, *i);
  47         }
  48
  49         sem_post(&m_accessLock);
  50 }
  51
  52 void NetworkSink::openSocket() {
  53         m_serverFd = -1;
  54         std::string port = Coordinator::instance()->vault()->get("tcpPort");
  55         if(port == "") {
  56                 return;
  57         }
  58         struct addrinfo hints;
  59
  60         memset(&hints, 0, sizeof(hints));
  61
  62         hints.ai_family = AF_UNSPEC;
  63         hints.ai_socktype = SOCK_STREAM;
  64         hints.ai_flags = AI_PASSIVE;
  65         hints.ai_protocol = 0;
  66         hints.ai_canonname = NULL;
  67         hints.ai_addr = NULL;
  68         hints.ai_next = NULL;
  69
  70         int rv = 0;
  71         struct addrinfo *result;
  72         if((rv = getaddrinfo(NULL, port.c_str(), &hints, &result)) == -1) {
  73                 std::cout << gai_strerror(rv) << std::endl;
  74                 return;
  75         }
  76
  77         int yes = 1;
  78
  79         struct addrinfo *rp;
  80         for(rp = result; rp != NULL; rp = rp->ai_next) {
  81                 m_serverFd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
  82                 if(m_serverFd == -1) continue;
  83
  84                 if(setsockopt(m_serverFd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) == -1) continue;
  85
  86                 if(bind(m_serverFd, rp->ai_addr, rp->ai_addrlen) == 0) break;
  87
  88                 close(m_serverFd);
  89         }
  90         if(rp == NULL) {
  91                 m_serverFd = -1;
  92                 return;
  93         }
  94
  95         m_sockType = rp->ai_family;
  96
  97         freeaddrinfo(result);
  98
  99         if(listen(m_serverFd, AesalonConnectionQueueLength) == -1) {
 100                 m_serverFd = -1;
 101                 return;
 102         }
 103
 104         int connectionCount = Common::StringTo<int>(Coordinator::instance()->vault()->get("networkWaitCount"));
 105
 106         bool shouldWait = Common::StringToBool(Coordinator::instance()->vault()->get("networkWait"));
 107         if(shouldWait) waitForConnections(connectionCount);
 108 }
 109
 110 void NetworkSink::closeSocket() {
 111         if(m_serverFd != -1) {
 112                 close(m_serverFd);
 113         }
 114 }
 115
 116 void NetworkSink::waitForConnections(int connectionCount) {
 117         std::cout << "Waiting for " << connectionCount << " connections . . ." << std::endl;
 118         for(int i = 0; i < connectionCount; i ++) {
 119                 struct sockaddr peerAddress;
 120                 socklen_t peerAddressSize = sizeof(peerAddress);
 121                 int fd = accept(m_serverFd, &peerAddress, &peerAddressSize);
 122                 if(fd == -1) {
 123                         i --;
 124                         continue;
 125                 }
 126 #if INET6_ADDRSTRLEN > INET_ADDRSTRLEN
 127                 char buffer[INET6_ADDRSTRLEN];
 128 #else
 129                 char buffer[INET_ADDRSTRLEN];
 130 #endif
 131
 132                 void *address = NULL;
 133
 134                 if(m_sockType == AF_INET) {
 135                         struct sockaddr_in *sin = (struct sockaddr_in *)&peerAddress;
 136                         address = &sin->sin_addr;
 137                 }
 138                 else if(m_sockType == AF_INET6) {
 139                         struct sockaddr_in6 *sin = (struct sockaddr_in6 *)&peerAddress;
 140                         address = &sin->sin6_addr;
 141                 }
 142                 inet_ntop(m_sockType, address, buffer, sizeof(buffer));
 143
 144                 std::cout << "Client connected from " << buffer << std::endl;
 145
 146                 m_clientFds.push_back(fd);
 147         }
 148 }
 149
 150 void NetworkSink::sendPacket(Common::VPacket *packet, int fd) {
 151         ModuleID moduleID = packet->moduleID();
 152         write(fd, &moduleID, sizeof(moduleID));
 153
 154         uint32_t processID = packet->processID();
 155         write(fd, &processID, sizeof(processID));
 156
 157         uint32_t threadID = packet->threadID();
 158         write(fd, &threadID, sizeof(threadID));
 159
 160         uint32_t dataSize = packet->dataSize();
 161         write(fd, &dataSize, sizeof(dataSize));
 162
 163         write(fd, packet->data(), dataSize);
 164 }
 165
 166 } // namespace VCommunication
 167 } // namespace Monitor