diff options
Diffstat (limited to 'chardev/char-pipe.c')
| -rw-r--r-- | chardev/char-pipe.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/chardev/char-pipe.c b/chardev/char-pipe.c new file mode 100644 index 0000000000..54240c863d --- /dev/null +++ b/chardev/char-pipe.c @@ -0,0 +1,191 @@ +/* + * QEMU System Emulator + * + * Copyright (c) 2003-2008 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "sysemu/char.h" + +#ifdef _WIN32 +#include "char-win.h" +#else +#include "char-fd.h" +#endif + +#ifdef _WIN32 +#define MAXCONNECT 1 +#define NTIMEOUT 5000 + +static int win_chr_pipe_init(Chardev *chr, const char *filename, + Error **errp) +{ + WinChardev *s = WIN_CHARDEV(chr); + OVERLAPPED ov; + int ret; + DWORD size; + char *openname; + + s->fpipe = TRUE; + + s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hsend) { + error_setg(errp, "Failed CreateEvent"); + goto fail; + } + s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hrecv) { + error_setg(errp, "Failed CreateEvent"); + goto fail; + } + + openname = g_strdup_printf("\\\\.\\pipe\\%s", filename); + s->hcom = CreateNamedPipe(openname, + PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, + PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | + PIPE_WAIT, + MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL); + g_free(openname); + if (s->hcom == INVALID_HANDLE_VALUE) { + error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError()); + s->hcom = NULL; + goto fail; + } + + ZeroMemory(&ov, sizeof(ov)); + ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + ret = ConnectNamedPipe(s->hcom, &ov); + if (ret) { + error_setg(errp, "Failed ConnectNamedPipe"); + goto fail; + } + + ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE); + if (!ret) { + error_setg(errp, "Failed GetOverlappedResult"); + if (ov.hEvent) { + CloseHandle(ov.hEvent); + ov.hEvent = NULL; + } + goto fail; + } + + if (ov.hEvent) { + CloseHandle(ov.hEvent); + ov.hEvent = NULL; + } + qemu_add_polling_cb(win_chr_pipe_poll, chr); + return 0; + + fail: + return -1; +} + +static void qemu_chr_open_pipe(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ + ChardevHostdev *opts = backend->u.pipe.data; + const char *filename = opts->device; + + if (win_chr_pipe_init(chr, filename, errp) < 0) { + return; + } +} + +#else + +static void qemu_chr_open_pipe(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ + ChardevHostdev *opts = backend->u.pipe.data; + int fd_in, fd_out; + char *filename_in; + char *filename_out; + const char *filename = opts->device; + + filename_in = g_strdup_printf("%s.in", filename); + filename_out = g_strdup_printf("%s.out", filename); + TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY)); + TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY)); + g_free(filename_in); + g_free(filename_out); + if (fd_in < 0 || fd_out < 0) { + if (fd_in >= 0) { + close(fd_in); + } + if (fd_out >= 0) { + close(fd_out); + } + TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); + if (fd_in < 0) { + error_setg_file_open(errp, errno, filename); + return; + } + } + qemu_chr_open_fd(chr, fd_in, fd_out); +} + +#endif /* !_WIN32 */ + +static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *device = qemu_opt_get(opts, "path"); + ChardevHostdev *dev; + + if (device == NULL) { + error_setg(errp, "chardev: pipe: no device path given"); + return; + } + backend->type = CHARDEV_BACKEND_KIND_PIPE; + dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1); + qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev)); + dev->device = g_strdup(device); +} + +static void char_pipe_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc = CHARDEV_CLASS(oc); + + cc->parse = qemu_chr_parse_pipe; + cc->open = qemu_chr_open_pipe; +} + +static const TypeInfo char_pipe_type_info = { + .name = TYPE_CHARDEV_PIPE, +#ifdef _WIN32 + .parent = TYPE_CHARDEV_WIN, +#else + .parent = TYPE_CHARDEV_FD, +#endif + .class_init = char_pipe_class_init, +}; + +static void register_types(void) +{ + type_register_static(&char_pipe_type_info); +} + +type_init(register_types); |