[libvirt PATCH v2 06/13] util: introduce compat wrappers for Winsock2
Daniel P. Berrangé
berrange at redhat.com
Thu Jan 16 15:24:41 UTC 2020
Windows sockets take a SOCKET HANDLE object instead of a
file descriptor. Wrap them in the same way that gnulib
does so that they use C runtime file descriptors.
While we could in theory use GSocket, it is hard to get
the exact same semantics libvirt has for its current
socket usage. Wrapping the Winsock2 APIs is thus the
easiest approach in the short term.
Reviewed-by: Pavel Hrdina <phrdina at redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---
src/util/Makefile.inc.am | 2 +
src/util/virsocket.c | 369 +++++++++++++++++++++++++++++++++++++++
src/util/virsocket.h | 92 ++++++++++
src/util/virutil.c | 29 ++-
4 files changed, 488 insertions(+), 4 deletions(-)
create mode 100644 src/util/virsocket.c
create mode 100644 src/util/virsocket.h
diff --git a/src/util/Makefile.inc.am b/src/util/Makefile.inc.am
index 23de4a6375..528c9f6cfe 100644
--- a/src/util/Makefile.inc.am
+++ b/src/util/Makefile.inc.am
@@ -188,6 +188,8 @@ UTIL_SOURCES = \
util/virseclabel.h \
util/virsecret.c \
util/virsecret.h \
+ util/virsocket.c \
+ util/virsocket.h \
util/virsocketaddr.c \
util/virsocketaddr.h \
util/virstorageencryption.c \
diff --git a/src/util/virsocket.c b/src/util/virsocket.c
new file mode 100644
index 0000000000..2d770b931b
--- /dev/null
+++ b/src/util/virsocket.c
@@ -0,0 +1,369 @@
+/*
+ * Copyright (C) 2020 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include "virsocket.h"
+
+#ifdef WIN32
+
+# include <fcntl.h>
+
+# define FD2SK(fd) _get_osfhandle(fd)
+# define SK2FD(sk) (_open_osfhandle((intptr_t) (sk), O_RDWR | O_BINARY))
+
+# define GET_HANDLE(fd) \
+
+# define RETURN_ERROR(call) \
+ if ((call) < 0) { \
+ set_errno(); \
+ return -1; \
+ }
+
+# undef accept
+# undef bind
+# undef closesocket
+# undef connect
+# undef dup
+# undef dup2
+# undef getpeername
+# undef getsockname
+# undef getsockopt
+# undef ioctlsocket
+# undef listen
+# undef setsockopt
+# undef socket
+
+static void
+set_errno(void)
+{
+ int err = WSAGetLastError();
+
+ /* Map some WSAE* errors to the runtime library's error codes. */
+ switch (err) {
+ case WSA_INVALID_HANDLE:
+ errno = EBADF;
+ break;
+ case WSA_NOT_ENOUGH_MEMORY:
+ errno = ENOMEM;
+ break;
+ case WSA_INVALID_PARAMETER:
+ errno = EINVAL;
+ break;
+ case WSAENAMETOOLONG:
+ errno = ENAMETOOLONG;
+ break;
+ case WSAENOTEMPTY:
+ errno = ENOTEMPTY;
+ break;
+ case WSAEWOULDBLOCK:
+ errno = EWOULDBLOCK;
+ break;
+ case WSAEINPROGRESS:
+ errno = EINPROGRESS;
+ break;
+ case WSAEALREADY:
+ errno = EALREADY;
+ break;
+ case WSAENOTSOCK:
+ errno = ENOTSOCK;
+ break;
+ case WSAEDESTADDRREQ:
+ errno = EDESTADDRREQ;
+ break;
+ case WSAEMSGSIZE:
+ errno = EMSGSIZE;
+ break;
+ case WSAEPROTOTYPE:
+ errno = EPROTOTYPE;
+ break;
+ case WSAENOPROTOOPT:
+ errno = ENOPROTOOPT;
+ break;
+ case WSAEPROTONOSUPPORT:
+ errno = EPROTONOSUPPORT;
+ break;
+ case WSAEOPNOTSUPP:
+ errno = EOPNOTSUPP;
+ break;
+ case WSAEAFNOSUPPORT:
+ errno = EAFNOSUPPORT;
+ break;
+ case WSAEADDRINUSE:
+ errno = EADDRINUSE;
+ break;
+ case WSAEADDRNOTAVAIL:
+ errno = EADDRNOTAVAIL;
+ break;
+ case WSAENETDOWN:
+ errno = ENETDOWN;
+ break;
+ case WSAENETUNREACH:
+ errno = ENETUNREACH;
+ break;
+ case WSAENETRESET:
+ errno = ENETRESET;
+ break;
+ case WSAECONNABORTED:
+ errno = ECONNABORTED;
+ break;
+ case WSAECONNRESET:
+ errno = ECONNRESET;
+ break;
+ case WSAENOBUFS:
+ errno = ENOBUFS;
+ break;
+ case WSAEISCONN:
+ errno = EISCONN;
+ break;
+ case WSAENOTCONN:
+ errno = ENOTCONN;
+ break;
+ case WSAETIMEDOUT:
+ errno = ETIMEDOUT;
+ break;
+ case WSAECONNREFUSED:
+ errno = ECONNREFUSED;
+ break;
+ case WSAELOOP:
+ errno = ELOOP;
+ break;
+ case WSAEHOSTUNREACH:
+ errno = EHOSTUNREACH;
+ break;
+ default:
+ errno = (err > 10000 && err < 10025) ? err - 10000 : err;
+ break;
+ }
+}
+
+
+int
+vir_accept(int fd, struct sockaddr *addr, socklen_t *addrlen)
+{
+ SOCKET sk = FD2SK(fd);
+ SOCKET csk;
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ csk = accept(sk, addr, addrlen);
+
+ if (csk == INVALID_SOCKET) {
+ set_errno();
+ return -1;
+ }
+
+ return SK2FD(csk);
+}
+
+
+int
+vir_bind(int fd, const struct sockaddr *addr, socklen_t addrlen)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (bind(sk, addr, addrlen) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_closesocket(int fd)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (closesocket(sk) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_connect(int fd, const struct sockaddr *addr, socklen_t addrlen)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (connect(sk, addr, addrlen) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_getpeername(int fd, struct sockaddr *addr, socklen_t *addrlen)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (getpeername(sk, addr, addrlen) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_getsockname(int fd, struct sockaddr *addr, socklen_t *addrlen)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (getsockname(sk, addr, addrlen) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_listen(int fd, int backlog)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (listen(sk, backlog) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_ioctlsocket(int fd, int cmd, void *arg)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (ioctlsocket(sk, cmd, arg) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_getsockopt(int fd, int level, int optname,
+ void *optval, socklen_t *optlen)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (getsockopt(sk, level, optname, optval, optlen) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_setsockopt(int fd, int level, int optname,
+ const void *optval, socklen_t optlen)
+{
+ SOCKET sk = FD2SK(fd);
+
+ if (sk == INVALID_SOCKET) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (setsockopt(sk, level, optname, optval, optlen) < 0) {
+ set_errno();
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+vir_socket(int domain, int type, int protocol)
+{
+ SOCKET sk;
+
+ /* We have to use WSASocket() instead of socket(), to create
+ * non-overlapped IO sockets. Overlapped IO sockets cannot
+ * be used with read/write.
+ */
+ sk = WSASocket(domain, type, protocol, NULL, 0, 0);
+ if (sk == INVALID_SOCKET) {
+ set_errno();
+ return -1;
+ }
+
+ return SK2FD(sk);
+}
+
+#endif /* WIN32 */
diff --git a/src/util/virsocket.h b/src/util/virsocket.h
new file mode 100644
index 0000000000..e9ef5380a3
--- /dev/null
+++ b/src/util/virsocket.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2020 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "internal.h"
+
+#ifdef WIN32
+
+# define WIN32_LEAN_AND_MEAN
+# include <errno.h>
+# include <winsock2.h>
+# include <ws2tcpip.h>
+# include <io.h>
+
+int vir_accept(int fd, struct sockaddr *addr, socklen_t *addrlen);
+int vir_bind(int fd, const struct sockaddr *addr, socklen_t addrlen);
+int vir_closesocket(int fd);
+int vir_connect(int fd, const struct sockaddr *addr, socklen_t addrlen);
+int vir_dup(int oldfd);
+int vir_dup2(int oldfd, int newfd);
+int vir_getpeername(int fd, struct sockaddr *addr, socklen_t *addrlen);
+int vir_getsockname(int fd, struct sockaddr *addr, socklen_t *addrlen);
+int vir_listen(int fd, int backlog);
+int vir_ioctlsocket(int fd, int cmd, void *arg);
+int vir_getsockopt(int fd, int level, int optname,
+ void *optval, socklen_t *optlen);
+int vir_setsockopt(int fd, int level, int optname,
+ const void *optval, socklen_t optlen);
+int vir_socket(int domain, int type, int protocol);
+
+
+/* Get rid of GNULIB's replacements */
+# undef accept
+# undef bind
+# undef closesocket
+# undef connect
+# undef dup
+# undef dup2
+# undef getpeername
+# undef getsockname
+# undef getsockopt
+# undef ioctlsocket
+# undef listen
+# undef setsockopt
+# undef socket
+
+/* Provide our own replacements */
+# define accept vir_accept
+# define bind vir_bind
+# define closesocket vir_closesocket
+# define connect vir_connect
+# define dup _dup
+# define dup2 _dup2
+# define ioctlsocket vir_ioctlsocket
+# define getpeername vir_getpeername
+# define getsockname vir_getsockname
+# define getsockopt vir_getsockopt
+# define listen vir_listen
+# define setsockopt vir_setsockopt
+# define socket vir_socket
+
+#else
+
+# include <sys/socket.h>
+# include <unistd.h>
+# include <sys/ioctl.h>
+# include <arpa/inet.h>
+# include <netinet/in.h>
+# include <netinet/udp.h>
+# include <netinet/tcp.h>
+# include <sys/un.h>
+
+# define closesocket close
+# define ioctlsocket ioctl
+
+#endif
diff --git a/src/util/virutil.c b/src/util/virutil.c
index a0fd7618ee..9ea9e2946d 100644
--- a/src/util/virutil.c
+++ b/src/util/virutil.c
@@ -71,10 +71,10 @@
#include "verify.h"
#include "virfile.h"
#include "vircommand.h"
-#include "nonblocking.h"
#include "virprocess.h"
#include "virstring.h"
#include "virutil.h"
+#include "virsocket.h"
verify(sizeof(gid_t) <= sizeof(unsigned int) &&
sizeof(uid_t) <= sizeof(unsigned int));
@@ -99,6 +99,21 @@ int virSetInherit(int fd, bool inherit)
return 0;
}
+
+int virSetBlocking(int fd, bool block)
+{
+ int fflags;
+ if ((fflags = fcntl(fd, F_GETFL)) < 0)
+ return -1;
+ if (block)
+ fflags &= ~O_NONBLOCK;
+ else
+ fflags |= O_NONBLOCK;
+ if ((fcntl(fd, F_SETFL, fflags)) < 0)
+ return -1;
+ return 0;
+}
+
#else /* WIN32 */
int virSetInherit(int fd G_GNUC_UNUSED, bool inherit G_GNUC_UNUSED)
@@ -110,13 +125,19 @@ int virSetInherit(int fd G_GNUC_UNUSED, bool inherit G_GNUC_UNUSED)
return 0;
}
-#endif /* WIN32 */
-
int virSetBlocking(int fd, bool blocking)
{
- return set_nonblocking_flag(fd, !blocking);
+ unsigned long arg = blocking ? 0 : 1;
+
+ if (ioctlsocket(fd, FIONBIO, &arg) < 0)
+ return -1;
+
+ return 0;
}
+#endif /* WIN32 */
+
+
int virSetNonBlock(int fd)
{
return virSetBlocking(fd, false);
--
2.24.1
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