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abd983c0e0
Instead of just checking whether it is possible to bind() on a socket, also check that we can successfully connect() to the socket we bound to. This more closely replicates the level of functionality that tests will actually use. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
150 lines
3.3 KiB
C
150 lines
3.3 KiB
C
/*
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* Helper functions for tests using sockets
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*
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* Copyright 2015-2018 Red Hat, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qemu/sockets.h"
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#include "socket-helpers.h"
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#ifndef AI_ADDRCONFIG
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# define AI_ADDRCONFIG 0
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#endif
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#ifndef EAI_ADDRFAMILY
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# define EAI_ADDRFAMILY 0
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#endif
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int socket_can_bind_connect(const char *hostname)
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{
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int lfd = -1, cfd = -1, afd = -1;
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struct addrinfo ai, *res = NULL;
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struct sockaddr_storage ss;
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socklen_t sslen = sizeof(ss);
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int soerr;
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socklen_t soerrlen = sizeof(soerr);
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bool check_soerr = false;
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int rc;
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int ret = -1;
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memset(&ai, 0, sizeof(ai));
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ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
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ai.ai_family = AF_UNSPEC;
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ai.ai_socktype = SOCK_STREAM;
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/* lookup */
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rc = getaddrinfo(hostname, NULL, &ai, &res);
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if (rc != 0) {
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if (rc == EAI_ADDRFAMILY ||
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rc == EAI_FAMILY) {
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errno = EADDRNOTAVAIL;
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} else {
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errno = EINVAL;
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}
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goto cleanup;
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}
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lfd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (lfd < 0) {
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goto cleanup;
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}
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cfd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (cfd < 0) {
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goto cleanup;
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}
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if (bind(lfd, res->ai_addr, res->ai_addrlen) < 0) {
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goto cleanup;
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}
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if (listen(lfd, 1) < 0) {
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goto cleanup;
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}
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if (getsockname(lfd, (struct sockaddr *)&ss, &sslen) < 0) {
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goto cleanup;
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}
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qemu_set_nonblock(cfd);
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if (connect(cfd, (struct sockaddr *)&ss, sslen) < 0) {
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if (errno == EINPROGRESS) {
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check_soerr = true;
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} else {
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goto cleanup;
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}
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}
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sslen = sizeof(ss);
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afd = accept(lfd, (struct sockaddr *)&ss, &sslen);
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if (afd < 0) {
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goto cleanup;
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}
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if (check_soerr) {
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if (qemu_getsockopt(cfd, SOL_SOCKET, SO_ERROR, &soerr, &soerrlen) < 0) {
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goto cleanup;
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}
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if (soerr) {
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errno = soerr;
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goto cleanup;
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}
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}
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ret = 0;
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cleanup:
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if (afd != -1) {
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close(afd);
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}
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if (cfd != -1) {
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close(cfd);
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}
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if (lfd != -1) {
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close(lfd);
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}
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if (res) {
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freeaddrinfo(res);
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}
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return ret;
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}
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int socket_check_protocol_support(bool *has_ipv4, bool *has_ipv6)
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{
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*has_ipv4 = *has_ipv6 = false;
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if (socket_can_bind_connect("127.0.0.1") < 0) {
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if (errno != EADDRNOTAVAIL) {
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return -1;
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}
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} else {
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*has_ipv4 = true;
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}
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if (socket_can_bind_connect("::1") < 0) {
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if (errno != EADDRNOTAVAIL) {
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return -1;
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}
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} else {
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*has_ipv6 = true;
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}
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return 0;
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}
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