+ better computer ip detection for computing server url

src/common/networkTools.cpp

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2012 Emmanuel Engelhart <kelson@kiwix.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
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include "networkTools.h"
+
+std::map<std::string, std::string> kiwix::getNetworkInterfaces() {
+  std::map<std::string, std::string> interfaces;
+
+  /* Get Network interfaces information */
+  char buf[16384];
+  struct ifconf ifconf;
+  int fd = socket(PF_INET, SOCK_DGRAM, 0); /* Only IPV4 */
+  ifconf.ifc_len=sizeof buf;
+  ifconf.ifc_buf=buf;
+  if(ioctl(fd, SIOCGIFCONF, &ifconf)!=0) {
+    perror("ioctl(SIOCGIFCONF)");
+    exit(EXIT_FAILURE);
+  }
+
+  /* Go through each interface */
+  int i;
+  size_t len;
+  struct ifreq *ifreq;
+  ifreq=ifconf.ifc_req;
+  for(i=0;i<ifconf.ifc_len;) {
+    /* Get the network interface name */
+    std::string interfaceName = std::string(ifreq->ifr_name);
+
+    /* Get the network interface ip */
+    char host[128];
+    getnameinfo(&(ifreq->ifr_addr), sizeof ifreq->ifr_addr, host, sizeof host, 0, 0, NI_NUMERICHOST);
+    std::string interfaceIp = std::string(host);
+
+    /* Add to the map */
+    interfaces.insert(std::pair<std::string, std::string>(interfaceName, interfaceIp)); 
+
+    /* some systems have ifr_addr.sa_len and adjust the length that                                                      
+     * way, but not mine. weird */
+#ifndef linux
+    len=IFNAMSIZ + ifreq->ifr_addr.sa_len;
+#else
+    len=sizeof *ifreq;
+#endif
+    ifreq=(struct ifreq*)((char*)ifreq+len);
+    i+=len;
+  }
+
+  return interfaces;
+}
+
+std::string kiwix::getBestPublicIp() {
+  std::map<std::string, std::string> interfaces = kiwix::getNetworkInterfaces();
+
+  if (interfaces.find("eth0") != interfaces.end()) {
+    return interfaces.find("eth0")->second;
+  } else if (interfaces.find("eth1") != interfaces.end()) {
+    return interfaces.find("eth1")->second;
+  } else if (interfaces.find("wlan0") != interfaces.end()) {
+    return interfaces.find("wlan0")->second;
+  } else if (interfaces.find("wlan1") != interfaces.end()) {
+    return interfaces.find("wlan1")->second;
+  }
+}

src/common/networkTools.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012 Emmanuel Engelhart <kelson@kiwix.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
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#ifndef KIWIX_NETWORKTOOLS_H
+#define KIWIX_NETWORKTOOLS_H
+
+#include <iostream>
+#include <vector>
+#include <string>
+#include <map>
+#include <stdio.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <net/if.h>
+#include <netdb.h>
+
+namespace kiwix {
+  std::map<std::string, std::string> getNetworkInterfaces();
+  std::string getBestPublicIp();
+}
+
+#endif