tests/qtest: Use send/recv for socket communication

Socket communication in the libqtest and libqmp codes uses read()
and write() which work on any file descriptor on *nix, and sockets
in *nix are an example of a file descriptor.

However sockets on Windows do not use *nix-style file descriptors,
so read() and write() cannot be used on sockets on Windows.
Switch over to use send() and recv() instead which work on both
Windows and *nix.

Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221028045736.679903-3-bin.meng@windriver.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/util/osdep.c b/util/osdep.c
index 746d5f7d71..77c1a6c562 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -502,6 +502,28 @@ int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
     return ret;
 }
 
+ssize_t qemu_send_full(int s, const void *buf, size_t count)
+{
+    ssize_t ret = 0;
+    ssize_t total = 0;
+
+    while (count) {
+        ret = send(s, buf, count, 0);
+        if (ret < 0) {
+            if (errno == EINTR) {
+                continue;
+            }
+            break;
+        }
+
+        count -= ret;
+        buf += ret;
+        total += ret;
+    }
+
+    return total;
+}
+
 void qemu_set_hw_version(const char *version)
 {
     hw_version = version;