[Qemu-devel] [PATCH] io: stronger check for support for IPv4/6

["Daniel P. Berrange" <berrange@redhat.com>]

Instead of just checking for bind(), use socket_listen()
so that we check getaddrinfo() can resolve IPv6 addrs
too. This should avoids test failures on QEMU travis
build systems which can't resolve IPv6 addrs.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 tests/test-io-channel-socket.c | 62 ++++++++++++++++++------------------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/tests/test-io-channel-socket.c b/tests/test-io-channel-socket.c
index ae665f5..060c109 100644
--- a/tests/test-io-channel-socket.c
+++ b/tests/test-io-channel-socket.c
@@ -23,48 +23,40 @@
 #include "io/channel-util.h"
 #include "io-channel-helpers.h"
 
-static int check_bind(struct sockaddr *sa, socklen_t salen, bool *has_proto)
+static bool check_listen(InetSocketAddress *saddr)
 {
-    int fd;
-
-    fd = socket(sa->sa_family, SOCK_STREAM, 0);
+    SocketAddress addr = {
+        .type = SOCKET_ADDRESS_KIND_INET,
+        .u.inet = saddr,
+    };
+    int fd = socket_listen(&addr, NULL);
     if (fd < 0) {
-        return -1;
-    }
-
-    if (bind(fd, sa, salen) < 0) {
-        close(fd);
-        if (errno == EADDRNOTAVAIL) {
-            *has_proto = false;
-            return 0;
-        }
-        return -1;
+        return false;
     }
-
     close(fd);
-    *has_proto = true;
-    return 0;
+    return true;
 }
 
-static int check_protocol_support(bool *has_ipv4, bool *has_ipv6)
+static void check_protocol_support(bool *has_ipv4, bool *has_ipv6)
 {
-    struct sockaddr_in sin = {
-        .sin_family = AF_INET,
-        .sin_addr = { .s_addr = htonl(INADDR_LOOPBACK) },
+    InetSocketAddress saddr4 = {
+        .host = (char *)"127.0.0.1",
+        .port = NULL,
+        .has_ipv4 = true,
+        .ipv4 = true,
+        .has_ipv6 = true,
+        .ipv6 = false,
     };
-    struct sockaddr_in6 sin6 = {
-        .sin6_family = AF_INET6,
-        .sin6_addr = IN6ADDR_LOOPBACK_INIT,
+    InetSocketAddress saddr6 = {
+        .host = (char *)"::1",
+        .port = NULL,
+        .has_ipv4 = true,
+        .ipv4 = false,
+        .has_ipv6 = true,
+        .ipv6 = true,
     };
-
-    if (check_bind((struct sockaddr *)&sin, sizeof(sin), has_ipv4) < 0) {
-        return -1;
-    }
-    if (check_bind((struct sockaddr *)&sin6, sizeof(sin6), has_ipv6) < 0) {
-        return -1;
-    }
-
-    return 0;
+    *has_ipv4 = check_listen(&saddr4);
+    *has_ipv6 = check_listen(&saddr6);
 }
 
 
@@ -510,9 +502,7 @@ int main(int argc, char **argv)
      * each protocol to avoid breaking tests on machines
      * with either IPv4 or IPv6 disabled.
      */
-    if (check_protocol_support(&has_ipv4, &has_ipv6) < 0) {
-        return 1;
-    }
+    check_protocol_support(&has_ipv4, &has_ipv6);
 
     if (has_ipv4) {
         g_test_add_func("/io/channel/socket/ipv4-sync",
-- 
2.5.0