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bh=DlJpWzkaAkR3sDdRMPNxntR2XIIAqQPPi8tpLQwnpcQ=; b=f8KhhtkBIrtO7bSQxVqjFgIuP99XoGcVe2I/Zqnrq4ckCWGh9bhrNGUNioUOnihXz05tC6 3UJ1iUfdzID0FrTuQVR66o7O2dsCB2aYE6z2HsIV59fznEQLp+iEfd59jM5qoyWWO7habC iJVPlpnLnpbyDsH+FNWYpOgXQFG8C1E= X-MC-Unique: nZ9MSheIM56EuV7NYwG-YA-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Stefan Hajnoczi , Samuel Thibault , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Stefan Weil , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Wainer dos Santos Moschetta , Laurent Vivier , Joel Stanley , Kevin Wolf , Paolo Bonzini , qemu-arm@nongnu.org, Eric Blake , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Michael Roth , "Dr. David Alan Gilbert" , Thomas Huth , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Beraldo Leal , Stefan Berger , Fam Zheng , Hanna Reitz , Peter Maydell , Markus Armbruster , Jason Wang Subject: [PULL 19/25] osdep: implement qemu_socketpair() for win32 Date: Mon, 13 Mar 2023 15:43:29 +0400 Message-Id: <20230313114335.424093-20-marcandre.lureau@redhat.com> In-Reply-To: <20230313114335.424093-1-marcandre.lureau@redhat.com> References: <20230313114335.424093-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1678708535517100001 From: Marc-Andr=C3=A9 Lureau Manually implement a socketpair() function, using UNIX sockets and simple peer credential checking. QEMU doesn't make much use of socketpair, beside vhost-user which is not available for win32 at this point. However, I intend to use it for writing some new portable tests. Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Daniel P. Berrang=C3=A9 Message-Id: <20230306122751.2355515-5-marcandre.lureau@redhat.com> --- include/qemu/sockets.h | 2 - util/oslib-win32.c | 110 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 110 insertions(+), 2 deletions(-) diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h index 2b0698a7c9..d935fd80da 100644 --- a/include/qemu/sockets.h +++ b/include/qemu/sockets.h @@ -15,7 +15,6 @@ int inet_aton(const char *cp, struct in_addr *ia); bool fd_is_socket(int fd); int qemu_socket(int domain, int type, int protocol); =20 -#ifndef WIN32 /** * qemu_socketpair: * @domain: specifies a communication domain, such as PF_UNIX @@ -30,7 +29,6 @@ int qemu_socket(int domain, int type, int protocol); * Return 0 on success. */ int qemu_socketpair(int domain, int type, int protocol, int sv[2]); -#endif =20 int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen); /* diff --git a/util/oslib-win32.c b/util/oslib-win32.c index 29a667ae3d..16f8a67f7e 100644 --- a/util/oslib-win32.c +++ b/util/oslib-win32.c @@ -310,6 +310,116 @@ bool qemu_socket_unselect(int sockfd, Error **errp) return qemu_socket_select(sockfd, NULL, 0, errp); } =20 +int qemu_socketpair(int domain, int type, int protocol, int sv[2]) +{ + struct sockaddr_un addr =3D { + 0, + }; + socklen_t socklen; + int listener =3D -1; + int client =3D -1; + int server =3D -1; + g_autofree char *path =3D NULL; + int tmpfd; + u_long arg; + int ret =3D -1; + + g_return_val_if_fail(sv !=3D NULL, -1); + + addr.sun_family =3D AF_UNIX; + socklen =3D sizeof(addr); + + tmpfd =3D g_file_open_tmp(NULL, &path, NULL); + if (tmpfd =3D=3D -1 || !path) { + errno =3D EACCES; + goto out; + } + + close(tmpfd); + + if (strlen(path) >=3D sizeof(addr.sun_path)) { + errno =3D EINVAL; + goto out; + } + + strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1); + + listener =3D socket(domain, type, protocol); + if (listener =3D=3D -1) { + goto out; + } + + if (DeleteFile(path) =3D=3D 0 && GetLastError() !=3D ERROR_FILE_NOT_FO= UND) { + errno =3D EACCES; + goto out; + } + g_clear_pointer(&path, g_free); + + if (bind(listener, (struct sockaddr *)&addr, socklen) =3D=3D -1) { + goto out; + } + + if (listen(listener, 1) =3D=3D -1) { + goto out; + } + + client =3D socket(domain, type, protocol); + if (client =3D=3D -1) { + goto out; + } + + arg =3D 1; + if (ioctlsocket(client, FIONBIO, &arg) !=3D NO_ERROR) { + goto out; + } + + if (connect(client, (struct sockaddr *)&addr, socklen) =3D=3D -1 && + WSAGetLastError() !=3D WSAEWOULDBLOCK) { + goto out; + } + + server =3D accept(listener, NULL, NULL); + if (server =3D=3D -1) { + goto out; + } + + arg =3D 0; + if (ioctlsocket(client, FIONBIO, &arg) !=3D NO_ERROR) { + goto out; + } + + arg =3D 0; + if (ioctlsocket(client, SIO_AF_UNIX_GETPEERPID, &arg) !=3D NO_ERROR) { + goto out; + } + + if (arg !=3D GetCurrentProcessId()) { + errno =3D EPERM; + goto out; + } + + sv[0] =3D server; + server =3D -1; + sv[1] =3D client; + client =3D -1; + ret =3D 0; + +out: + if (listener !=3D -1) { + close(listener); + } + if (client !=3D -1) { + close(client); + } + if (server !=3D -1) { + close(server); + } + if (path) { + DeleteFile(path); + } + return ret; +} + #undef connect int qemu_connect_wrap(int sockfd, const struct sockaddr *addr, socklen_t addrlen) --=20 2.39.2