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95b9db4ee2
Currently, we are mixing: #if HAVE_BLAH with #if WITH_BLAH.
Things got way better with Pavel's work on meson, but apparently,
mixing these two lead to confusing and easy to miss bugs (see
31fb929eca for instance). While we were forced to use HAVE_
prefix with autotools, we are free to chose our own prefix with
meson and since WITH_ prefix appears to be more popular let's use
it everywhere.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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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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#include <config.h>
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#if WITH_DLFCN_H
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# include <dlfcn.h>
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#endif
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#if defined(__linux__) && defined(RTLD_NEXT)
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# include "virsocket.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 G_GNUC_UNUSED,
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const struct sockaddr *addr,
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socklen_t addrlen G_GNUC_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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#else /* defined(__linux__) && defined(RTLD_NEXT) */
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/* Nothing to override on other platforms. */
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#endif
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