| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <errno.h> |
| |
| #if defined(_ALLBSD_SOURCE) |
| #include <sys/sysctl.h> |
| #endif |
| |
| #include "jni.h" |
| #include "net_util.h" |
| #include "sun_net_PortConfig.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| struct portrange { |
| int lower; |
| int higher; |
| }; |
| |
| static int getPortRange(struct portrange *range) |
| { |
| #ifdef __linux__ |
| { |
| FILE *f; |
| int ret; |
| |
| f = fopen("/proc/sys/net/ipv4/ip_local_port_range", "r"); |
| if (f != NULL) { |
| ret = fscanf(f, "%d %d", &range->lower, &range->higher); |
| fclose(f); |
| return ret == 2 ? 0 : -1; |
| } |
| return -1; |
| } |
| |
| #elif defined(__solaris__) |
| { |
| range->higher = net_getParam("/dev/tcp", "tcp_largest_anon_port"); |
| range->lower = net_getParam("/dev/tcp", "tcp_smallest_anon_port"); |
| return 0; |
| } |
| #elif defined(_ALLBSD_SOURCE) |
| { |
| int ret; |
| size_t size = sizeof(range->lower); |
| ret = sysctlbyname( |
| "net.inet.ip.portrange.first", &range->lower, &size, 0, 0 |
| ); |
| if (ret == -1) { |
| return -1; |
| } |
| size = sizeof(range->higher); |
| ret = sysctlbyname( |
| "net.inet.ip.portrange.last", &range->higher, &size, 0, 0 |
| ); |
| return ret; |
| } |
| #else |
| return -1; |
| #endif |
| } |
| |
| /* |
| * Class: sun_net_PortConfig |
| * Method: getLower0 |
| * Signature: ()I |
| */ |
| JNIEXPORT jint JNICALL Java_sun_net_PortConfig_getLower0 |
| (JNIEnv *env, jclass clazz) |
| { |
| struct portrange range; |
| if (getPortRange(&range) < 0) { |
| return -1; |
| } |
| return range.lower; |
| } |
| |
| /* |
| * Class: sun_net_PortConfig |
| * Method: getUpper0 |
| * Signature: ()I |
| */ |
| JNIEXPORT jint JNICALL Java_sun_net_PortConfig_getUpper0 |
| (JNIEnv *env, jclass clazz) |
| { |
| struct portrange range; |
| if (getPortRange(&range) < 0) { |
| return -1; |
| } |
| return range.higher; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |