mirror of https://gitee.com/openkylin/libvirt.git
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
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/*
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* Copyright (C) 2013-2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Daniel P. Berrange <berrange@redhat.com>
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*/
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#include <config.h>
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#include <stdlib.h>
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#if HAVE_DLFCN_H
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# include <dlfcn.h>
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#endif
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#if defined(RTLD_NEXT)
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# include "internal.h"
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# include <sys/socket.h>
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# include <errno.h>
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# include <arpa/inet.h>
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# include <netinet/in.h>
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# include <stdio.h>
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# include <unistd.h>
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static bool host_has_ipv6;
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static int (*realsocket)(int domain, int type, int protocol);
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static void init_syms(void)
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{
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int fd;
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if (realsocket)
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return;
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realsocket = dlsym(RTLD_NEXT, "socket");
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if (!realsocket) {
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fprintf(stderr, "Unable to find 'socket' symbol\n");
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abort();
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}
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fd = realsocket(AF_INET6, SOCK_STREAM, 0);
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if (fd < 0)
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return;
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host_has_ipv6 = true;
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close(fd);
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}
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int socket(int domain,
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int type,
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int protocol)
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{
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init_syms();
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if (getenv("LIBVIRT_TEST_IPV4ONLY") && domain == AF_INET6) {
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errno = EAFNOSUPPORT;
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return -1;
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}
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return realsocket(domain, type, protocol);
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}
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int bind(int sockfd ATTRIBUTE_UNUSED,
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const struct sockaddr *addr,
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socklen_t addrlen ATTRIBUTE_UNUSED)
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{
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struct sockaddr_in saddr;
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memcpy(&saddr, addr, sizeof(saddr));
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if (host_has_ipv6 && !getenv("LIBVIRT_TEST_IPV4ONLY")) {
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if (saddr.sin_port == htons(5900) ||
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(saddr.sin_family == AF_INET &&
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saddr.sin_port == htons(5904)) ||
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(saddr.sin_family == AF_INET6 &&
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(saddr.sin_port == htons(5905) ||
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saddr.sin_port == htons(5906)))) {
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errno = EADDRINUSE;
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return -1;
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}
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return 0;
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}
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if (saddr.sin_port == htons(5900) ||
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saddr.sin_port == htons(5904) ||
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saddr.sin_port == htons(5905) ||
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saddr.sin_port == htons(5906)) {
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errno = EADDRINUSE;
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return -1;
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}
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return 0;
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}
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#endif /* ! defined(RTLD_NEXT) */
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