195 lines
4.9 KiB
C++
195 lines
4.9 KiB
C++
/***************************************************************************
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* Copyright (C) 04/2006 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "socket.h"
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#include "logging.h"
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Socket::Socket()
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{
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if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
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LogSystem::log(LOG_CRIT, "Socket: socket()");
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strcpy(devname, "any");
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memset(&addr, 0, sizeof(addr));
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}
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Socket::~Socket()
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{
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close(fd);
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}
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bool Socket::checkDeviceFlags(const char* name)
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{
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struct ifreq ifr;
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strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
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LogSystem::log(LOG_WARN, "Socket: ioctl(SIOCGIFFLAGS) %s", name);
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return false;
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}
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if (!(ifr.ifr_flags & IFF_UP) || (ifr.ifr_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)))
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return false;
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return true;
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}
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bool Socket::bindToDevice(const char* name)
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{
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struct ifreq ifr;
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strncpy(devname, name, sizeof(devname));
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strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ioctl(fd, SIOCGIFADDR, &ifr) != 0) {
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LogSystem::log(LOG_WARN, "Socket: ioctl(SIOCGIFADDR) %s", devname);
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return false;
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}
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memcpy(&addr, &ifr.ifr_addr, sizeof(addr));
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if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, devname, sizeof(devname)) < 0) {
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LogSystem::log(LOG_NOTICE, "Socket: setsockopt(SO_BINDTODEVICE) %s", devname);
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// no failure!
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//return false;
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}
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return true;
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}
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bool Socket::bindToAddress(struct sockaddr_in* tmp)
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{
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int i = 1;
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if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i)) < 0) {
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LogSystem::log(LOG_NOTICE, "Socket: setsockopt(SO_REUSEADDR) %s", devname);
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return false;
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}
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memcpy(&addr, tmp, sizeof(addr));
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if (bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
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LogSystem::log(LOG_WARN, "Socket: bind(%s:%d)",
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inet_ntoa(addr.sin_addr),
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ntohs(addr.sin_port));
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return false;
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}
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return true;
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}
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bool Socket::setBroadcast(int flag)
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{
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if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &flag, sizeof(flag))) {
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LogSystem::log(LOG_WARN, "Socket: setsockopt(SO_BROADCAST) %s", devname);
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return false;
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}
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return true;
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}
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Socket* Socket::createSocket(struct sockaddr_in* addr)
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{
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Socket* sock = new Socket();
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if (!sock->bindToAddress(addr)) {
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delete sock;
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return NULL;
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}
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sock->setBroadcast(1);
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return sock;
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}
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Socket* Socket::createSocket(const char* name, int port)
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{
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Socket* sock = new Socket();
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if (!sock->checkDeviceFlags(name)) {
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delete sock;
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return NULL;
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}
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if (!sock->bindToDevice(name)) {
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delete sock;
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return NULL;
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}
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sock->addr.sin_port = htons(port);
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if (!sock->bindToAddress(&sock->addr)) {
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delete sock;
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return NULL;
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}
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sock->setBroadcast(1);
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return sock;
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}
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int Socket::show(char* buf, int size)
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{
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return snprintf(buf, size, "%s (%s:%d) ", devname,
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inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
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}
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int Socket::getRecvSize()
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{
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int retval;
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if (ioctl(fd, FIONREAD, &retval) == -1) {
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LogSystem::log(LOG_ERROR, "Socket::getRecvSize()");
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return 0;
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}
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return retval;
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}
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int Socket::getFD() {
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return fd;
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}
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int Socket::sendto(NetPkt* pkt, struct sockaddr_in* dst) {
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if (!dst)
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dst = &pkt->addr;
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if (::sendto(fd, pkt->data, pkt->size, 0, (struct sockaddr *)dst, sizeof(*dst)) < 0)
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LogSystem::log(LOG_WARN, "Socket::sendto()");
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return 0;
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}
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NetPkt* Socket::recv() {
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fd_set fdsel;
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FD_ZERO(&fdsel);
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FD_SET(fd, &fdsel);
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select(FD_SETSIZE, &fdsel, NULL, NULL, NULL);
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NetPkt* pkt = new NetPkt(this->getRecvSize());
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socklen_t i = sizeof(pkt->addr);
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pkt->size = ::recvfrom(fd, (void*)pkt->data, pkt->alloc, 0, (struct sockaddr *)&pkt->addr, &i);
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return pkt;
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}
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