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Re: [Qemu-devel] [PATCH v3 4/8] sockets: strengthen test suite IP protoc
From: |
Marc-André Lureau |
Subject: |
Re: [Qemu-devel] [PATCH v3 4/8] sockets: strengthen test suite IP protocol availability checks |
Date: |
Wed, 3 Jan 2018 19:33:15 +0100 |
On Fri, Dec 22, 2017 at 2:45 PM, Daniel P. Berrange <address@hidden> wrote:
> 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.
>
> Signed-off-by: Daniel P. Berrange <address@hidden>
Reviewed-by: Marc-André Lureau <address@hidden>
> ---
> tests/socket-helpers.c | 67
> +++++++++++++++++++++++++++++++++++++++++++-------
> tests/socket-helpers.h | 4 +--
> 2 files changed, 60 insertions(+), 11 deletions(-)
>
> diff --git a/tests/socket-helpers.c b/tests/socket-helpers.c
> index 13b6bb38eb..161aa5da09 100644
> --- a/tests/socket-helpers.c
> +++ b/tests/socket-helpers.c
> @@ -30,10 +30,15 @@
> # define EAI_ADDRFAMILY 0
> #endif
>
> -int socket_can_bind(const char *hostname)
> +int socket_can_bind_connect(const char *hostname)
> {
> - int fd = -1;
> + int lfd = -1, cfd = -1, afd = -1;
> struct addrinfo ai, *res = NULL;
> + struct sockaddr_storage ss;
> + socklen_t sslen = sizeof(ss);
> + int soerr;
> + socklen_t soerrlen = sizeof(soerr);
> + bool check_soerr = false;
> int rc;
> int ret = -1;
>
> @@ -54,24 +59,68 @@ int socket_can_bind(const char *hostname)
> goto cleanup;
> }
>
> - fd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
> - if (fd < 0) {
> + lfd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
> + if (lfd < 0) {
> goto cleanup;
> }
>
> - if (bind(fd, res->ai_addr, res->ai_addrlen) < 0) {
> + cfd = qemu_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
> + if (cfd < 0) {
> + goto cleanup;
> + }
> +
> + if (bind(lfd, res->ai_addr, res->ai_addrlen) < 0) {
> if (errno == EADDRNOTAVAIL) {
> goto done;
> }
> goto cleanup;
> }
>
> + if (listen(lfd, 1) < 0) {
> + goto cleanup;
> + }
> +
> + if (getsockname(lfd, (struct sockaddr *)&ss, &sslen) < 0) {
> + goto cleanup;
> + }
> +
> + qemu_set_nonblock(cfd);
> + if (connect(cfd, (struct sockaddr *)&ss, sslen) < 0) {
> + if (errno == EINPROGRESS) {
> + check_soerr = true;
> + } else {
> + goto cleanup;
> + }
> + }
> +
> + sslen = sizeof(ss);
> + afd = accept(lfd, (struct sockaddr *)&ss, &sslen);
> + if (afd < 0) {
> + goto cleanup;
> + }
> +
> + if (check_soerr) {
> + if (qemu_getsockopt(cfd, SOL_SOCKET, SO_ERROR, &soerr, &soerrlen) <
> 0) {
> + goto cleanup;
> + }
> + if (soerr) {
> + errno = soerr;
> + goto cleanup;
> + }
> + }
> +
> done:
> ret = 0;
>
> cleanup:
> - if (fd != -1) {
> - close(fd);
> + if (afd != -1) {
> + close(afd);
> + }
> + if (cfd != -1) {
> + close(cfd);
> + }
> + if (lfd != -1) {
> + close(lfd);
> }
> if (res) {
> freeaddrinfo(res);
> @@ -84,7 +133,7 @@ int socket_check_protocol_support(bool *has_ipv4, bool
> *has_ipv6)
> {
> *has_ipv4 = *has_ipv6 = false;
>
> - if (socket_can_bind("127.0.0.1") < 0) {
> + if (socket_can_bind_connect("127.0.0.1") < 0) {
> if (errno != EADDRNOTAVAIL) {
> return -1;
> }
> @@ -92,7 +141,7 @@ int socket_check_protocol_support(bool *has_ipv4, bool
> *has_ipv6)
> *has_ipv4 = true;
> }
>
> - if (socket_can_bind("::1") < 0) {
> + if (socket_can_bind_connect("::1") < 0) {
> if (errno != EADDRNOTAVAIL) {
> return -1;
> }
> diff --git a/tests/socket-helpers.h b/tests/socket-helpers.h
> index efa96eddc2..1c07d6d656 100644
> --- a/tests/socket-helpers.h
> +++ b/tests/socket-helpers.h
> @@ -21,13 +21,13 @@
> /*
> * @hostname: a DNS name or numeric IP address
> *
> - * Check whether it is possible to bind to ports
> + * Check whether it is possible to bind & connect to ports
> * on the DNS name or IP address @hostname. If an IP address
> * is used, it must not be a wildcard address.
> *
> * Returns 0 on success, -1 on error with errno set
> */
> -int socket_can_bind(const char *hostname);
> +int socket_can_bind_connect(const char *hostname);
>
> /*
> * @has_ipv4: set to true on return if IPv4 is available
> --
> 2.14.3
>
>
--
Marc-André Lureau
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