2 * Helper functions for tests using sockets
4 * Copyright 2015-2018 Red Hat, Inc.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 or
9 * (at your option) version 3 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
22 #include "qemu/sockets.h"
23 #include "socket-helpers.h"
26 # define AI_ADDRCONFIG 0
28 #ifndef EAI_ADDRFAMILY
29 # define EAI_ADDRFAMILY 0
33 * @hostname: a DNS name or numeric IP address
35 * Check whether it is possible to bind & connect to ports
36 * on the DNS name or IP address @hostname. If an IP address
37 * is used, it must not be a wildcard address.
39 * Returns 0 on success, -1 on error with errno set
41 static int socket_can_bind_connect(const char *hostname, int family)
43 int lfd = -1, cfd = -1, afd = -1;
44 struct addrinfo ai, *res = NULL;
45 struct sockaddr_storage ss;
46 socklen_t sslen = sizeof(ss);
48 socklen_t soerrlen = sizeof(soerr);
49 bool check_soerr = false;
53 memset(&ai, 0, sizeof(ai));
54 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
55 ai.ai_family = family;
56 ai.ai_socktype = SOCK_STREAM;
59 rc = getaddrinfo(hostname, NULL, &ai, &res);
61 if (rc == EAI_ADDRFAMILY || rc == EAI_FAMILY || rc == EAI_NONAME) {
62 errno = EADDRNOTAVAIL;
69 lfd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
74 cfd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
79 if (bind(lfd, res->ai_addr, res->ai_addrlen) < 0) {
83 if (listen(lfd, 1) < 0) {
87 if (getsockname(lfd, (struct sockaddr *)&ss, &sslen) < 0) {
91 qemu_socket_set_nonblock(cfd);
92 if (connect(cfd, (struct sockaddr *)&ss, sslen) < 0) {
93 if (errno == EINPROGRESS) {
101 afd = accept(lfd, (struct sockaddr *)&ss, &sslen);
107 if (getsockopt(cfd, SOL_SOCKET, SO_ERROR, &soerr, &soerrlen) < 0) {
135 int socket_check_protocol_support(bool *has_ipv4, bool *has_ipv6)
137 *has_ipv4 = *has_ipv6 = false;
139 if (socket_can_bind_connect("127.0.0.1", PF_INET) < 0) {
140 if (errno != EADDRNOTAVAIL) {
147 if (socket_can_bind_connect("::1", PF_INET6) < 0) {
148 if (errno != EADDRNOTAVAIL) {
158 void socket_check_afunix_support(bool *has_afunix)
162 fd = socket(PF_UNIX, SOCK_STREAM, 0);
166 *has_afunix = (fd != (int)INVALID_SOCKET);
168 *has_afunix = (fd >= 0);