[v4,5/9] sockets: move fd_is_socket() into common sockets code

From: "Daniel P. Berrange" <berrange@redhat.com>

The fd_is_socket() helper method is useful in a few places, so put it in
the common sockets code. Make the code more compact while moving it.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 include/qemu/sockets.h    |  1 +
 io/channel-util.c         | 13 --------
 tests/.gitignore          |  1 +
 tests/Makefile.include    |  3 ++
 tests/test-util-sockets.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++
 util/qemu-sockets.c       |  8 +++++
 6 files changed, 90 insertions(+), 13 deletions(-)
 create mode 100644 tests/test-util-sockets.c

On Mon, Feb 5, 2018 at 4:24 PM, Daniel P. Berrangé <berrange@redhat.com> wrote:
> From: "Daniel P. Berrange" <berrange@redhat.com>
>
> The fd_is_socket() helper method is useful in a few places, so put it in
> the common sockets code. Make the code more compact while moving it.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

> ---
>  include/qemu/sockets.h    |  1 +
>  io/channel-util.c         | 13 --------
>  tests/.gitignore          |  1 +
>  tests/Makefile.include    |  3 ++
>  tests/test-util-sockets.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++
>  util/qemu-sockets.c       |  8 +++++
>  6 files changed, 90 insertions(+), 13 deletions(-)
>  create mode 100644 tests/test-util-sockets.c
>
> diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
> index 8889bcb1ec..88777590dd 100644
> --- a/include/qemu/sockets.h
> +++ b/include/qemu/sockets.h
> @@ -12,6 +12,7 @@ int inet_aton(const char *cp, struct in_addr *ia);
>  #include "qapi-types.h"
>
>  /* misc helpers */
> +bool fd_is_socket(int fd);
>  int qemu_socket(int domain, int type, int protocol);
>  int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
>  int socket_set_cork(int fd, int v);
> diff --git a/io/channel-util.c b/io/channel-util.c
> index 0fb4bd0837..423d79845a 100644
> --- a/io/channel-util.c
> +++ b/io/channel-util.c
> @@ -24,19 +24,6 @@
>  #include "io/channel-socket.h"
>
>
> -static bool fd_is_socket(int fd)
> -{
> -    int optval;
> -    socklen_t optlen;
> -    optlen = sizeof(optval);
> -    return qemu_getsockopt(fd,
> -                           SOL_SOCKET,
> -                           SO_TYPE,
> -                           (char *)&optval,
> -                           &optlen) == 0;
> -}
> -
> -
>  QIOChannel *qio_channel_new_fd(int fd,
>                                 Error **errp)
>  {
> diff --git a/tests/.gitignore b/tests/.gitignore
> index e5c744b7ed..e2e3f71db7 100644
> --- a/tests/.gitignore
> +++ b/tests/.gitignore
> @@ -87,6 +87,7 @@ test-thread-pool
>  test-throttle
>  test-timed-average
>  test-uuid
> +test-util-sockets
>  test-visitor-serialization
>  test-vmstate
>  test-write-threshold
> diff --git a/tests/Makefile.include b/tests/Makefile.include
> index 7bfdabeb6d..c2b51ef93c 100644
> --- a/tests/Makefile.include
> +++ b/tests/Makefile.include
> @@ -136,6 +136,7 @@ ifneq (,$(findstring qemu-ga,$(TOOLS)))
>  check-unit-$(CONFIG_LINUX) += tests/test-qga$(EXESUF)
>  endif
>  check-unit-y += tests/test-timed-average$(EXESUF)
> +check-unit-y += tests/test-util-sockets$(EXESUF)
>  check-unit-y += tests/test-io-task$(EXESUF)
>  check-unit-y += tests/test-io-channel-socket$(EXESUF)
>  check-unit-y += tests/test-io-channel-file$(EXESUF)
> @@ -706,6 +707,8 @@ tests/test-crypto-tlscredsx509$(EXESUF): tests/test-crypto-tlscredsx509.o \
>  tests/test-crypto-tlssession.o-cflags := $(TASN1_CFLAGS)
>  tests/test-crypto-tlssession$(EXESUF): tests/test-crypto-tlssession.o \
>         tests/crypto-tls-x509-helpers.o tests/pkix_asn1_tab.o $(test-crypto-obj-y)
> +tests/test-util-sockets$(EXESUF): tests/test-util-sockets.o \
> +       tests/socket-helpers.o $(test-util-obj-y)
>  tests/test-io-task$(EXESUF): tests/test-io-task.o $(test-io-obj-y)
>  tests/test-io-channel-socket$(EXESUF): tests/test-io-channel-socket.o \
>          tests/io-channel-helpers.o tests/socket-helpers.o $(test-io-obj-y)
> diff --git a/tests/test-util-sockets.c b/tests/test-util-sockets.c
> new file mode 100644
> index 0000000000..65190e0530
> --- /dev/null
> +++ b/tests/test-util-sockets.c
> @@ -0,0 +1,77 @@
> +/*
> + * Tests for util/qemu-sockets.c
> + *
> + * Copyright 2018 Red Hat, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this library; if not, see <http://www.gnu.org/licenses/>.
> + *
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu-common.h"
> +#include "qemu/sockets.h"
> +#include "qapi/error.h"
> +#include "socket-helpers.h"
> +
> +static void test_fd_is_socket_bad(void)
> +{
> +    char *tmp = g_strdup("qemu-test-util-sockets-XXXXXX");
> +    int fd = mkstemp(tmp);
> +    if (fd != 0) {
> +        unlink(tmp);
> +    }
> +    g_free(tmp);
> +
> +    g_assert(fd >= 0);
> +
> +    g_assert(!fd_is_socket(fd));
> +    close(fd);
> +}
> +
> +static void test_fd_is_socket_good(void)
> +{
> +    int fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
> +
> +    g_assert(fd >= 0);
> +
> +    g_assert(fd_is_socket(fd));
> +    close(fd);
> +}
> +
> +int main(int argc, char **argv)
> +{
> +    bool has_ipv4, has_ipv6;
> +
> +    socket_init();
> +
> +    g_test_init(&argc, &argv, NULL);
> +
> +    /* We're creating actual IPv4/6 sockets, so we should
> +     * check if the host running tests actually supports
> +     * each protocol to avoid breaking tests on machines
> +     * with either IPv4 or IPv6 disabled.
> +     */
> +    if (socket_check_protocol_support(&has_ipv4, &has_ipv6) < 0) {
> +        return 1;
> +    }
> +
> +    if (has_ipv4) {
> +        g_test_add_func("/util/socket/is-socket/bad",
> +                        test_fd_is_socket_bad);
> +        g_test_add_func("/util/socket/is-socket/good",
> +                        test_fd_is_socket_good);
> +    }
> +
> +    return g_test_run();
> +}
> diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
> index d6a1e1759e..3e36584a00 100644
> --- a/util/qemu-sockets.c
> +++ b/util/qemu-sockets.c
> @@ -91,6 +91,14 @@ NetworkAddressFamily inet_netfamily(int family)
>      return NETWORK_ADDRESS_FAMILY_UNKNOWN;
>  }
>
> +bool fd_is_socket(int fd)
> +{
> +    int optval;
> +    socklen_t optlen = sizeof(optval);
> +    return !qemu_getsockopt(fd, SOL_SOCKET, SO_TYPE, &optval, &optlen);
> +}
> +
> +
>  /*
>   * Matrix we're trying to apply
>   *
> --
> 2.14.3
>