src/solaris/native/java/net/NetworkInterface.c

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rev 8822 : 8024854: PPC64: Basic changes and files to build the class library on AIX
Reviewed-by: alanb, prr, sla, chegar, michaelm, mullan, art
Contributed-by: luchsh@linux.vnet.ibm.com, spoole@linux.vnet.ibm.com, thomas.stuefe@sap.com
   1 /*
   2  * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37 #include <arpa/inet.h>
  38 #include <net/if.h>
  39 #include <net/if_arp.h>
  40 
  41 #ifdef __solaris__
  42 #include <sys/dlpi.h>
  43 #include <fcntl.h>
  44 #include <stropts.h>
  45 #include <sys/sockio.h>
  46 #endif
  47 
  48 #ifdef __linux__
  49 #include <sys/ioctl.h>
  50 #include <bits/ioctls.h>
  51 #include <sys/utsname.h>
  52 #include <stdio.h>
  53 #endif
  54 







  55 #ifdef __linux__
  56 #define _PATH_PROCNET_IFINET6           "/proc/net/if_inet6"
  57 #endif
  58 
  59 #if defined(_ALLBSD_SOURCE)
  60 #include <sys/param.h>
  61 #include <sys/ioctl.h>
  62 #include <sys/sockio.h>
  63 #if defined(__APPLE__)
  64 #include <net/ethernet.h>
  65 #include <net/if_var.h>
  66 #include <net/if_dl.h>
  67 #include <netinet/in_var.h>
  68 #include <ifaddrs.h>
  69 #endif
  70 #endif
  71 
  72 #include "jvm.h"
  73 #include "jni_util.h"
  74 #include "net_util.h"


1024  * proto is AF_INET/AF_INET6
1025  */
1026 static int  openSocket(JNIEnv *env, int proto){
1027     int sock;
1028 
1029     if ((sock = JVM_Socket(proto, SOCK_DGRAM, 0)) < 0) {
1030         /*
1031          * If EPROTONOSUPPORT is returned it means we don't have
1032          * support  for this proto so don't throw an exception.
1033          */
1034         if (errno != EPROTONOSUPPORT) {
1035             NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "Socket creation failed");
1036         }
1037         return -1;
1038     }
1039 
1040     return sock;
1041 }
1042 
1043 
1044 /** Linux **/
1045 #ifdef __linux__
1046 /* Open socket for further ioct calls, try v4 socket first and
1047  * if it falls return v6 socket
1048  */
1049 
1050 #ifdef AF_INET6
1051 static int openSocketWithFallback(JNIEnv *env, const char *ifname){
1052     int sock;
1053     struct ifreq if2;
1054 
1055      if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1056          if (errno == EPROTONOSUPPORT){
1057               if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){
1058                  NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
1059                  return -1;
1060               }
1061          }
1062          else{ // errno is not NOSUPPORT
1063              NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed");
1064              return -1;
1065          }
1066    }
1067 
1068      /* Linux starting from 2.6.? kernel allows ioctl call with either IPv4 or IPv6 socket regardless of type
1069         of address of an interface */
1070 
1071        return sock;
1072 }
1073 
1074 #else
1075 static int openSocketWithFallback(JNIEnv *env, const char *ifname){
1076     return openSocket(env,AF_INET);
1077 }
1078 #endif
1079 
1080 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1081     struct ifconf ifc;
1082     struct ifreq *ifreqP;
1083     char *buf;
1084     int numifs;
1085     unsigned i;

1086 
1087 

1088     /* need to do a dummy SIOCGIFCONF to determine the buffer size.
1089      * SIOCGIFCOUNT doesn't work
1090      */
1091     ifc.ifc_buf = NULL;
1092     if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1093         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed");
1094         return ifs;
1095     }







1096 
1097     CHECKED_MALLOC3(buf,char *, ifc.ifc_len);
1098 
1099     ifc.ifc_buf = buf;
1100     if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {



1101         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed");
1102         (void) free(buf);
1103         return ifs;
1104     }
1105 
1106     /*
1107      * Iterate through each interface
1108      */
1109     ifreqP = ifc.ifc_req;
1110     for (i=0; i<ifc.ifc_len/sizeof (struct ifreq); i++, ifreqP++) {



1111         /*
1112          * Add to the list
1113          */
1114         ifs = addif(env, sock, ifreqP->ifr_name, ifs, (struct sockaddr *) & (ifreqP->ifr_addr), AF_INET, 0);
1115 
1116         /*
1117          * If an exception occurred then free the list
1118          */
1119         if ((*env)->ExceptionOccurred(env)) {
1120             free(buf);
1121             freeif(ifs);
1122             return NULL;
1123         }
1124     }
1125 
1126     /*
1127      * Free socket and buffer
1128      */
1129     free(buf);
1130     return ifs;
1131 }
1132 
1133 
1134 /*
1135  * Enumerates and returns all IPv6 interfaces on Linux
1136  */
1137 
1138 #ifdef AF_INET6
1139 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1140     FILE *f;
1141     char addr6[40], devname[21];
1142     char addr6p[8][5];
1143     int plen, scope, dad_status, if_idx;
1144     uint8_t ipv6addr[16];
1145 
1146     if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
1147         while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
1148                          addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4], addr6p[5], addr6p[6], addr6p[7],
1149                          &if_idx, &plen, &scope, &dad_status, devname) != EOF) {
1150 
1151             struct netif *ifs_ptr = NULL;
1152             struct netif *last_ptr = NULL;
1153             struct sockaddr_in6 addr;
1154 
1155             sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
1156                            addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
1157             inet_pton(AF_INET6, addr6, ipv6addr);
1158 


1162             addr.sin6_scope_id = if_idx;
1163 
1164             ifs = addif(env, sock, devname, ifs, (struct sockaddr *)&addr, AF_INET6, plen);
1165 
1166 
1167             /*
1168              * If an exception occurred then return the list as is.
1169              */
1170             if ((*env)->ExceptionOccurred(env)) {
1171                 fclose(f);
1172                 return ifs;
1173             }
1174        }
1175        fclose(f);
1176     }
1177     return ifs;
1178 }
1179 #endif
1180 
1181 


























































































1182 static int getIndex(int sock, const char *name){
1183      /*
1184       * Try to get the interface index
1185       * (Not supported on Solaris 2.6 or 7)
1186       */



1187     struct ifreq if2;
1188     strcpy(if2.ifr_name, name);
1189 
1190     if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) {
1191         return -1;
1192     }
1193 
1194     return if2.ifr_ifindex;

1195 }
1196 
1197 /**
1198  * Returns the IPv4 broadcast address of a named interface, if it exists.
1199  * Returns 0 if it doesn't have one.
1200  */
1201 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store) {
1202   struct sockaddr *ret = NULL;
1203   struct ifreq if2;
1204 
1205   memset((char *) &if2, 0, sizeof(if2));
1206   strcpy(if2.ifr_name, ifname);
1207 
1208   /* Let's make sure the interface does have a broadcast address */
1209   if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2)  < 0) {
1210       NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL  SIOCGIFFLAGS failed");
1211       return ret;
1212   }
1213 
1214   if (if2.ifr_flags & IFF_BROADCAST) {


1241         NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFNETMASK failed");
1242         return -1;
1243     }
1244 
1245     mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr);
1246     ret = 0;
1247     while (mask) {
1248        mask <<= 1;
1249        ret++;
1250     }
1251 
1252     return ret;
1253 }
1254 
1255 /**
1256  * Get the Hardware address (usually MAC address) for the named interface.
1257  * return puts the data in buf, and returns the length, in byte, of the
1258  * MAC address. Returns -1 if there is no hardware address on that interface.
1259  */
1260 static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf) {








































1261     static struct ifreq ifr;
1262     int i;
1263 
1264     strcpy(ifr.ifr_name, ifname);
1265     if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) {
1266         NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFHWADDR failed");
1267         return -1;
1268     }
1269 
1270     memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN);
1271 
1272    /*
1273     * All bytes to 0 means no hardware address.
1274     */
1275 
1276     for (i = 0; i < IFHWADDRLEN; i++) {
1277         if (buf[i] != 0)
1278             return IFHWADDRLEN;
1279     }
1280 
1281     return -1;

1282 }
1283 
1284 static int getMTU(JNIEnv *env, int sock,  const char *ifname) {
1285     struct ifreq if2;
1286 
1287     memset((char *) &if2, 0, sizeof(if2));
1288     strcpy(if2.ifr_name, ifname);
1289 
1290     if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
1291         NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFMTU failed");
1292         return -1;
1293     }
1294 
1295     return  if2.ifr_mtu;
1296 }
1297 
1298 static int getFlags(int sock, const char *ifname, int *flags) {
1299   struct ifreq if2;
1300 
1301   memset((char *) &if2, 0, sizeof(if2));


   1 /*
   2  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37 #include <arpa/inet.h>
  38 #include <net/if.h>
  39 #include <net/if_arp.h>
  40 
  41 #ifdef __solaris__
  42 #include <sys/dlpi.h>
  43 #include <fcntl.h>
  44 #include <stropts.h>
  45 #include <sys/sockio.h>
  46 #endif
  47 
  48 #ifdef __linux__
  49 #include <sys/ioctl.h>
  50 #include <bits/ioctls.h>
  51 #include <sys/utsname.h>
  52 #include <stdio.h>
  53 #endif
  54 
  55 #if defined(_AIX)
  56 #include <sys/ioctl.h>
  57 #include <netinet/in6_var.h>
  58 #include <sys/ndd_var.h>
  59 #include <sys/kinfo.h>
  60 #endif
  61 
  62 #ifdef __linux__
  63 #define _PATH_PROCNET_IFINET6           "/proc/net/if_inet6"
  64 #endif
  65 
  66 #if defined(_ALLBSD_SOURCE)
  67 #include <sys/param.h>
  68 #include <sys/ioctl.h>
  69 #include <sys/sockio.h>
  70 #if defined(__APPLE__)
  71 #include <net/ethernet.h>
  72 #include <net/if_var.h>
  73 #include <net/if_dl.h>
  74 #include <netinet/in_var.h>
  75 #include <ifaddrs.h>
  76 #endif
  77 #endif
  78 
  79 #include "jvm.h"
  80 #include "jni_util.h"
  81 #include "net_util.h"


1031  * proto is AF_INET/AF_INET6
1032  */
1033 static int  openSocket(JNIEnv *env, int proto){
1034     int sock;
1035 
1036     if ((sock = JVM_Socket(proto, SOCK_DGRAM, 0)) < 0) {
1037         /*
1038          * If EPROTONOSUPPORT is returned it means we don't have
1039          * support  for this proto so don't throw an exception.
1040          */
1041         if (errno != EPROTONOSUPPORT) {
1042             NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "Socket creation failed");
1043         }
1044         return -1;
1045     }
1046 
1047     return sock;
1048 }
1049 
1050 
1051 /** Linux, AIX **/
1052 #if defined(__linux__) || defined(_AIX)
1053 /* Open socket for further ioct calls, try v4 socket first and
1054  * if it falls return v6 socket
1055  */
1056 
1057 #ifdef AF_INET6
1058 static int openSocketWithFallback(JNIEnv *env, const char *ifname){
1059     int sock;
1060     struct ifreq if2;
1061 
1062      if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1063          if (errno == EPROTONOSUPPORT){
1064               if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){
1065                  NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
1066                  return -1;
1067               }
1068          }
1069          else{ // errno is not NOSUPPORT
1070              NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed");
1071              return -1;
1072          }
1073    }
1074 
1075      /* Linux starting from 2.6.? kernel allows ioctl call with either IPv4 or IPv6 socket regardless of type
1076         of address of an interface */
1077 
1078        return sock;
1079 }
1080 
1081 #else
1082 static int openSocketWithFallback(JNIEnv *env, const char *ifname){
1083     return openSocket(env,AF_INET);
1084 }
1085 #endif
1086 
1087 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1088     struct ifconf ifc;
1089     struct ifreq *ifreqP;
1090     char *buf = NULL;
1091     int numifs;
1092     unsigned i;
1093     int siocgifconfRequest = SIOCGIFCONF;
1094 
1095 
1096 #if defined(__linux__)
1097     /* need to do a dummy SIOCGIFCONF to determine the buffer size.
1098      * SIOCGIFCOUNT doesn't work
1099      */
1100     ifc.ifc_buf = NULL;
1101     if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1102         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed");
1103         return ifs;
1104     }
1105 #elif defined(_AIX)
1106     ifc.ifc_buf = NULL;
1107     if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) {
1108         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGSIZIFCONF failed");
1109         return ifs;
1110     }
1111 #endif /* __linux__ */
1112 
1113     CHECKED_MALLOC3(buf,char *, ifc.ifc_len);
1114 
1115     ifc.ifc_buf = buf;
1116 #if defined(_AIX)
1117     siocgifconfRequest = CSIOCGIFCONF;
1118 #endif
1119     if (ioctl(sock, siocgifconfRequest, (char *)&ifc) < 0) {
1120         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed");
1121         (void) free(buf);
1122         return ifs;
1123     }
1124 
1125     /*
1126      * Iterate through each interface
1127      */
1128     ifreqP = ifc.ifc_req;
1129     for (i=0; i<ifc.ifc_len/sizeof (struct ifreq); i++, ifreqP++) {
1130 #if defined(_AIX)
1131         if (ifreqP->ifr_addr.sa_family != AF_INET) continue;
1132 #endif
1133         /*
1134          * Add to the list
1135          */
1136         ifs = addif(env, sock, ifreqP->ifr_name, ifs, (struct sockaddr *) & (ifreqP->ifr_addr), AF_INET, 0);
1137 
1138         /*
1139          * If an exception occurred then free the list
1140          */
1141         if ((*env)->ExceptionOccurred(env)) {
1142             free(buf);
1143             freeif(ifs);
1144             return NULL;
1145         }
1146     }
1147 
1148     /*
1149      * Free socket and buffer
1150      */
1151     free(buf);
1152     return ifs;
1153 }
1154 
1155 
1156 /*
1157  * Enumerates and returns all IPv6 interfaces on Linux
1158  */
1159 
1160 #if defined(AF_INET6) && defined(__linux__)
1161 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1162     FILE *f;
1163     char addr6[40], devname[21];
1164     char addr6p[8][5];
1165     int plen, scope, dad_status, if_idx;
1166     uint8_t ipv6addr[16];
1167 
1168     if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
1169         while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
1170                          addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4], addr6p[5], addr6p[6], addr6p[7],
1171                          &if_idx, &plen, &scope, &dad_status, devname) != EOF) {
1172 
1173             struct netif *ifs_ptr = NULL;
1174             struct netif *last_ptr = NULL;
1175             struct sockaddr_in6 addr;
1176 
1177             sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
1178                            addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
1179             inet_pton(AF_INET6, addr6, ipv6addr);
1180 


1184             addr.sin6_scope_id = if_idx;
1185 
1186             ifs = addif(env, sock, devname, ifs, (struct sockaddr *)&addr, AF_INET6, plen);
1187 
1188 
1189             /*
1190              * If an exception occurred then return the list as is.
1191              */
1192             if ((*env)->ExceptionOccurred(env)) {
1193                 fclose(f);
1194                 return ifs;
1195             }
1196        }
1197        fclose(f);
1198     }
1199     return ifs;
1200 }
1201 #endif
1202 
1203 
1204 /*
1205  * Enumerates and returns all IPv6 interfaces on AIX
1206  */
1207 
1208 #if defined(AF_INET6) && defined(_AIX)
1209 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1210     struct ifconf ifc;
1211     struct ifreq *ifreqP;
1212     char *buf;
1213     int numifs;
1214     unsigned i;
1215     unsigned bufsize;
1216     char *cp, *cplimit;
1217 
1218     /* use SIOCGSIZIFCONF to get size for  SIOCGIFCONF */
1219 
1220     ifc.ifc_buf = NULL;
1221     if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) {
1222         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
1223                         "ioctl SIOCGSIZIFCONF failed");
1224         return ifs;
1225     }
1226     bufsize = ifc.ifc_len;
1227 
1228     buf = (char *)malloc(bufsize);
1229     if (!buf) {
1230         JNU_ThrowOutOfMemoryError(env, "Network interface native buffer allocation failed");
1231         return ifs;
1232     }
1233     ifc.ifc_len = bufsize;
1234     ifc.ifc_buf = buf;
1235     if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1236         NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
1237                        "ioctl CSIOCGIFCONF failed");
1238         free(buf);
1239         return ifs;
1240     }
1241 
1242     /*
1243      * Iterate through each interface
1244      */
1245     ifreqP = ifc.ifc_req;
1246     cp = (char *)ifc.ifc_req;
1247     cplimit = cp + ifc.ifc_len;
1248 
1249     for ( ; cp < cplimit; cp += (sizeof(ifreqP->ifr_name) + MAX((ifreqP->ifr_addr).sa_len, sizeof(ifreqP->ifr_addr)))) {
1250         ifreqP = (struct ifreq *)cp;
1251         struct ifreq if2;
1252 
1253         memset((char *)&if2, 0, sizeof(if2));
1254         strcpy(if2.ifr_name, ifreqP->ifr_name);
1255 
1256         /*
1257          * Skip interface that aren't UP
1258          */
1259         if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) >= 0) {
1260             if (!(if2.ifr_flags & IFF_UP)) {
1261                 continue;
1262             }
1263         }
1264 
1265         if (ifreqP->ifr_addr.sa_family != AF_INET6)
1266             continue;
1267 
1268         /*
1269          * Add to the list
1270          */
1271         ifs = addif(env, sock, ifreqP->ifr_name, ifs,
1272                     (struct sockaddr *)&(ifreqP->ifr_addr),
1273                      AF_INET6, 0);
1274 
1275         /*
1276          * If an exception occurred then free the list
1277          */
1278         if ((*env)->ExceptionOccurred(env)) {
1279             free(buf);
1280             freeif(ifs);
1281             return NULL;
1282         }
1283     }
1284 
1285     /*
1286      * Free socket and buffer
1287      */
1288     free(buf);
1289     return ifs;
1290 }
1291 #endif
1292 
1293 
1294 static int getIndex(int sock, const char *name){
1295      /*
1296       * Try to get the interface index

1297       */
1298 #if defined(_AIX)
1299     return if_nametoindex(name);
1300 #else
1301     struct ifreq if2;
1302     strcpy(if2.ifr_name, name);
1303 
1304     if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) {
1305         return -1;
1306     }
1307 
1308     return if2.ifr_ifindex;
1309 #endif
1310 }
1311 
1312 /**
1313  * Returns the IPv4 broadcast address of a named interface, if it exists.
1314  * Returns 0 if it doesn't have one.
1315  */
1316 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store) {
1317   struct sockaddr *ret = NULL;
1318   struct ifreq if2;
1319 
1320   memset((char *) &if2, 0, sizeof(if2));
1321   strcpy(if2.ifr_name, ifname);
1322 
1323   /* Let's make sure the interface does have a broadcast address */
1324   if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2)  < 0) {
1325       NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL  SIOCGIFFLAGS failed");
1326       return ret;
1327   }
1328 
1329   if (if2.ifr_flags & IFF_BROADCAST) {


1356         NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFNETMASK failed");
1357         return -1;
1358     }
1359 
1360     mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr);
1361     ret = 0;
1362     while (mask) {
1363        mask <<= 1;
1364        ret++;
1365     }
1366 
1367     return ret;
1368 }
1369 
1370 /**
1371  * Get the Hardware address (usually MAC address) for the named interface.
1372  * return puts the data in buf, and returns the length, in byte, of the
1373  * MAC address. Returns -1 if there is no hardware address on that interface.
1374  */
1375 static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf) {
1376 #if defined (_AIX)
1377     int size;
1378     struct kinfo_ndd *nddp;
1379     void *end;
1380 
1381     size = getkerninfo(KINFO_NDD, 0, 0, 0);
1382     if (size == 0) {
1383         return -1;
1384     }
1385 
1386     if (size < 0) {
1387         perror("getkerninfo 1");
1388         return -1;
1389     }
1390 
1391     nddp = (struct kinfo_ndd *)malloc(size);
1392 
1393     if (!nddp) {
1394         return -1;
1395     }
1396 
1397     if (getkerninfo(KINFO_NDD, nddp, &size, 0) < 0) {
1398         perror("getkerninfo 2");
1399         return -1;
1400     }
1401 
1402     end = (void *)nddp + size;
1403     while ((void *)nddp < end) {
1404         if (!strcmp(nddp->ndd_alias, ifname) ||
1405                 !strcmp(nddp->ndd_name, ifname)) {
1406             bcopy(nddp->ndd_addr, buf, 6);
1407             return 6;
1408         } else {
1409             nddp++;
1410         }
1411     }
1412 
1413     return -1;
1414 
1415 #elif defined(__linux__)
1416     static struct ifreq ifr;
1417     int i;
1418 
1419     strcpy(ifr.ifr_name, ifname);
1420     if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) {
1421         NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFHWADDR failed");
1422         return -1;
1423     }
1424 
1425     memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN);
1426 
1427    /*
1428     * All bytes to 0 means no hardware address.
1429     */
1430 
1431     for (i = 0; i < IFHWADDRLEN; i++) {
1432         if (buf[i] != 0)
1433             return IFHWADDRLEN;
1434     }
1435 
1436     return -1;
1437 #endif
1438 }
1439 
1440 static int getMTU(JNIEnv *env, int sock,  const char *ifname) {
1441     struct ifreq if2;
1442 
1443     memset((char *) &if2, 0, sizeof(if2));
1444     strcpy(if2.ifr_name, ifname);
1445 
1446     if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
1447         NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFMTU failed");
1448         return -1;
1449     }
1450 
1451     return  if2.ifr_mtu;
1452 }
1453 
1454 static int getFlags(int sock, const char *ifname, int *flags) {
1455   struct ifreq if2;
1456 
1457   memset((char *) &if2, 0, sizeof(if2));