| /* |
| * 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-common.h" |
| #include "monitor/monitor.h" |
| #include "ui/console.h" |
| #include "sysemu/sysemu.h" |
| #include "qemu/timer.h" |
| #include "sysemu/char.h" |
| #include "hw/usb.h" |
| #include "qmp-commands.h" |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <time.h> |
| #include <errno.h> |
| #include <sys/time.h> |
| #include <zlib.h> |
| |
| #ifndef _WIN32 |
| #include <sys/times.h> |
| #include <sys/wait.h> |
| #include <termios.h> |
| #include <sys/mman.h> |
| #include <sys/ioctl.h> |
| #include <sys/resource.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <net/if.h> |
| #include <arpa/inet.h> |
| #include <dirent.h> |
| #include <netdb.h> |
| #include <sys/select.h> |
| #ifdef CONFIG_BSD |
| #include <sys/stat.h> |
| #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| #include <dev/ppbus/ppi.h> |
| #include <dev/ppbus/ppbconf.h> |
| #elif defined(__DragonFly__) |
| #include <dev/misc/ppi/ppi.h> |
| #include <bus/ppbus/ppbconf.h> |
| #endif |
| #else |
| #ifdef __linux__ |
| #include <linux/ppdev.h> |
| #include <linux/parport.h> |
| #endif |
| #ifdef __sun__ |
| #include <sys/stat.h> |
| #include <sys/ethernet.h> |
| #include <sys/sockio.h> |
| #include <netinet/arp.h> |
| #include <netinet/in.h> |
| #include <netinet/in_systm.h> |
| #include <netinet/ip.h> |
| #include <netinet/ip_icmp.h> // must come after ip.h |
| #include <netinet/udp.h> |
| #include <netinet/tcp.h> |
| #endif |
| #endif |
| #endif |
| |
| #include "qemu/sockets.h" |
| #include "ui/qemu-spice.h" |
| |
| #define READ_BUF_LEN 4096 |
| |
| /***********************************************************/ |
| /* character device */ |
| |
| static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs = |
| QTAILQ_HEAD_INITIALIZER(chardevs); |
| |
| void qemu_chr_be_event(CharDriverState *s, int event) |
| { |
| /* Keep track if the char device is open */ |
| switch (event) { |
| case CHR_EVENT_OPENED: |
| s->be_open = 1; |
| break; |
| case CHR_EVENT_CLOSED: |
| s->be_open = 0; |
| break; |
| } |
| |
| if (!s->chr_event) |
| return; |
| s->chr_event(s->handler_opaque, event); |
| } |
| |
| void qemu_chr_be_generic_open(CharDriverState *s) |
| { |
| qemu_chr_be_event(s, CHR_EVENT_OPENED); |
| } |
| |
| int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len) |
| { |
| return s->chr_write(s, buf, len); |
| } |
| |
| int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len) |
| { |
| int offset = 0; |
| int res; |
| |
| while (offset < len) { |
| do { |
| res = s->chr_write(s, buf + offset, len - offset); |
| if (res == -1 && errno == EAGAIN) { |
| g_usleep(100); |
| } |
| } while (res == -1 && errno == EAGAIN); |
| |
| if (res == 0) { |
| break; |
| } |
| |
| if (res < 0) { |
| return res; |
| } |
| |
| offset += res; |
| } |
| |
| return offset; |
| } |
| |
| int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg) |
| { |
| if (!s->chr_ioctl) |
| return -ENOTSUP; |
| return s->chr_ioctl(s, cmd, arg); |
| } |
| |
| int qemu_chr_be_can_write(CharDriverState *s) |
| { |
| if (!s->chr_can_read) |
| return 0; |
| return s->chr_can_read(s->handler_opaque); |
| } |
| |
| void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len) |
| { |
| if (s->chr_read) { |
| s->chr_read(s->handler_opaque, buf, len); |
| } |
| } |
| |
| int qemu_chr_fe_get_msgfd(CharDriverState *s) |
| { |
| return s->get_msgfd ? s->get_msgfd(s) : -1; |
| } |
| |
| int qemu_chr_add_client(CharDriverState *s, int fd) |
| { |
| return s->chr_add_client ? s->chr_add_client(s, fd) : -1; |
| } |
| |
| void qemu_chr_accept_input(CharDriverState *s) |
| { |
| if (s->chr_accept_input) |
| s->chr_accept_input(s); |
| qemu_notify_event(); |
| } |
| |
| void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...) |
| { |
| char buf[READ_BUF_LEN]; |
| va_list ap; |
| va_start(ap, fmt); |
| vsnprintf(buf, sizeof(buf), fmt, ap); |
| qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf)); |
| va_end(ap); |
| } |
| |
| static void remove_fd_in_watch(CharDriverState *chr); |
| |
| void qemu_chr_add_handlers(CharDriverState *s, |
| IOCanReadHandler *fd_can_read, |
| IOReadHandler *fd_read, |
| IOEventHandler *fd_event, |
| void *opaque) |
| { |
| int fe_open; |
| |
| if (!opaque && !fd_can_read && !fd_read && !fd_event) { |
| fe_open = 0; |
| remove_fd_in_watch(s); |
| } else { |
| fe_open = 1; |
| } |
| s->chr_can_read = fd_can_read; |
| s->chr_read = fd_read; |
| s->chr_event = fd_event; |
| s->handler_opaque = opaque; |
| if (fe_open && s->chr_update_read_handler) |
| s->chr_update_read_handler(s); |
| |
| if (!s->explicit_fe_open) { |
| qemu_chr_fe_set_open(s, fe_open); |
| } |
| |
| /* We're connecting to an already opened device, so let's make sure we |
| also get the open event */ |
| if (fe_open && s->be_open) { |
| qemu_chr_be_generic_open(s); |
| } |
| } |
| |
| static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| return len; |
| } |
| |
| static CharDriverState *qemu_chr_open_null(void) |
| { |
| CharDriverState *chr; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| chr->chr_write = null_chr_write; |
| chr->explicit_be_open = true; |
| return chr; |
| } |
| |
| /* MUX driver for serial I/O splitting */ |
| #define MAX_MUX 4 |
| #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */ |
| #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1) |
| typedef struct { |
| IOCanReadHandler *chr_can_read[MAX_MUX]; |
| IOReadHandler *chr_read[MAX_MUX]; |
| IOEventHandler *chr_event[MAX_MUX]; |
| void *ext_opaque[MAX_MUX]; |
| CharDriverState *drv; |
| int focus; |
| int mux_cnt; |
| int term_got_escape; |
| int max_size; |
| /* Intermediate input buffer allows to catch escape sequences even if the |
| currently active device is not accepting any input - but only until it |
| is full as well. */ |
| unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE]; |
| int prod[MAX_MUX]; |
| int cons[MAX_MUX]; |
| int timestamps; |
| int linestart; |
| int64_t timestamps_start; |
| } MuxDriver; |
| |
| |
| static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| MuxDriver *d = chr->opaque; |
| int ret; |
| if (!d->timestamps) { |
| ret = d->drv->chr_write(d->drv, buf, len); |
| } else { |
| int i; |
| |
| ret = 0; |
| for (i = 0; i < len; i++) { |
| if (d->linestart) { |
| char buf1[64]; |
| int64_t ti; |
| int secs; |
| |
| ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| if (d->timestamps_start == -1) |
| d->timestamps_start = ti; |
| ti -= d->timestamps_start; |
| secs = ti / 1000; |
| snprintf(buf1, sizeof(buf1), |
| "[%02d:%02d:%02d.%03d] ", |
| secs / 3600, |
| (secs / 60) % 60, |
| secs % 60, |
| (int)(ti % 1000)); |
| d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1)); |
| d->linestart = 0; |
| } |
| ret += d->drv->chr_write(d->drv, buf+i, 1); |
| if (buf[i] == '\n') { |
| d->linestart = 1; |
| } |
| } |
| } |
| return ret; |
| } |
| |
| static const char * const mux_help[] = { |
| "% h print this help\n\r", |
| "% x exit emulator\n\r", |
| "% s save disk data back to file (if -snapshot)\n\r", |
| "% t toggle console timestamps\n\r" |
| "% b send break (magic sysrq)\n\r", |
| "% c switch between console and monitor\n\r", |
| "% % sends %\n\r", |
| NULL |
| }; |
| |
| int term_escape_char = 0x01; /* ctrl-a is used for escape */ |
| static void mux_print_help(CharDriverState *chr) |
| { |
| int i, j; |
| char ebuf[15] = "Escape-Char"; |
| char cbuf[50] = "\n\r"; |
| |
| if (term_escape_char > 0 && term_escape_char < 26) { |
| snprintf(cbuf, sizeof(cbuf), "\n\r"); |
| snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a'); |
| } else { |
| snprintf(cbuf, sizeof(cbuf), |
| "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r", |
| term_escape_char); |
| } |
| chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf)); |
| for (i = 0; mux_help[i] != NULL; i++) { |
| for (j=0; mux_help[i][j] != '\0'; j++) { |
| if (mux_help[i][j] == '%') |
| chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf)); |
| else |
| chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1); |
| } |
| } |
| } |
| |
| static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event) |
| { |
| if (d->chr_event[mux_nr]) |
| d->chr_event[mux_nr](d->ext_opaque[mux_nr], event); |
| } |
| |
| static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch) |
| { |
| if (d->term_got_escape) { |
| d->term_got_escape = 0; |
| if (ch == term_escape_char) |
| goto send_char; |
| switch(ch) { |
| case '?': |
| case 'h': |
| mux_print_help(chr); |
| break; |
| case 'x': |
| { |
| const char *term = "QEMU: Terminated\n\r"; |
| chr->chr_write(chr,(uint8_t *)term,strlen(term)); |
| exit(0); |
| break; |
| } |
| case 's': |
| bdrv_commit_all(); |
| break; |
| case 'b': |
| qemu_chr_be_event(chr, CHR_EVENT_BREAK); |
| break; |
| case 'c': |
| /* Switch to the next registered device */ |
| mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT); |
| d->focus++; |
| if (d->focus >= d->mux_cnt) |
| d->focus = 0; |
| mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN); |
| break; |
| case 't': |
| d->timestamps = !d->timestamps; |
| d->timestamps_start = -1; |
| d->linestart = 0; |
| break; |
| } |
| } else if (ch == term_escape_char) { |
| d->term_got_escape = 1; |
| } else { |
| send_char: |
| return 1; |
| } |
| return 0; |
| } |
| |
| static void mux_chr_accept_input(CharDriverState *chr) |
| { |
| MuxDriver *d = chr->opaque; |
| int m = d->focus; |
| |
| while (d->prod[m] != d->cons[m] && |
| d->chr_can_read[m] && |
| d->chr_can_read[m](d->ext_opaque[m])) { |
| d->chr_read[m](d->ext_opaque[m], |
| &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1); |
| } |
| } |
| |
| static int mux_chr_can_read(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| MuxDriver *d = chr->opaque; |
| int m = d->focus; |
| |
| if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) |
| return 1; |
| if (d->chr_can_read[m]) |
| return d->chr_can_read[m](d->ext_opaque[m]); |
| return 0; |
| } |
| |
| static void mux_chr_read(void *opaque, const uint8_t *buf, int size) |
| { |
| CharDriverState *chr = opaque; |
| MuxDriver *d = chr->opaque; |
| int m = d->focus; |
| int i; |
| |
| mux_chr_accept_input (opaque); |
| |
| for(i = 0; i < size; i++) |
| if (mux_proc_byte(chr, d, buf[i])) { |
| if (d->prod[m] == d->cons[m] && |
| d->chr_can_read[m] && |
| d->chr_can_read[m](d->ext_opaque[m])) |
| d->chr_read[m](d->ext_opaque[m], &buf[i], 1); |
| else |
| d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i]; |
| } |
| } |
| |
| static void mux_chr_event(void *opaque, int event) |
| { |
| CharDriverState *chr = opaque; |
| MuxDriver *d = chr->opaque; |
| int i; |
| |
| /* Send the event to all registered listeners */ |
| for (i = 0; i < d->mux_cnt; i++) |
| mux_chr_send_event(d, i, event); |
| } |
| |
| static void mux_chr_update_read_handler(CharDriverState *chr) |
| { |
| MuxDriver *d = chr->opaque; |
| |
| if (d->mux_cnt >= MAX_MUX) { |
| fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n"); |
| return; |
| } |
| d->ext_opaque[d->mux_cnt] = chr->handler_opaque; |
| d->chr_can_read[d->mux_cnt] = chr->chr_can_read; |
| d->chr_read[d->mux_cnt] = chr->chr_read; |
| d->chr_event[d->mux_cnt] = chr->chr_event; |
| /* Fix up the real driver with mux routines */ |
| if (d->mux_cnt == 0) { |
| qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read, |
| mux_chr_event, chr); |
| } |
| if (d->focus != -1) { |
| mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT); |
| } |
| d->focus = d->mux_cnt; |
| d->mux_cnt++; |
| mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN); |
| } |
| |
| static bool muxes_realized; |
| |
| /** |
| * Called after processing of default and command-line-specified |
| * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached |
| * to a mux chardev. This is done here to ensure that |
| * output/prompts/banners are only displayed for the FE that has |
| * focus when initial command-line processing/machine init is |
| * completed. |
| * |
| * After this point, any new FE attached to any new or existing |
| * mux will receive CHR_EVENT_OPENED notifications for the BE |
| * immediately. |
| */ |
| static void muxes_realize_done(Notifier *notifier, void *unused) |
| { |
| CharDriverState *chr; |
| |
| QTAILQ_FOREACH(chr, &chardevs, next) { |
| if (chr->is_mux) { |
| MuxDriver *d = chr->opaque; |
| int i; |
| |
| /* send OPENED to all already-attached FEs */ |
| for (i = 0; i < d->mux_cnt; i++) { |
| mux_chr_send_event(d, i, CHR_EVENT_OPENED); |
| } |
| /* mark mux as OPENED so any new FEs will immediately receive |
| * OPENED event |
| */ |
| qemu_chr_be_generic_open(chr); |
| } |
| } |
| muxes_realized = true; |
| } |
| |
| static Notifier muxes_realize_notify = { |
| .notify = muxes_realize_done, |
| }; |
| |
| static CharDriverState *qemu_chr_open_mux(CharDriverState *drv) |
| { |
| CharDriverState *chr; |
| MuxDriver *d; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| d = g_malloc0(sizeof(MuxDriver)); |
| |
| chr->opaque = d; |
| d->drv = drv; |
| d->focus = -1; |
| chr->chr_write = mux_chr_write; |
| chr->chr_update_read_handler = mux_chr_update_read_handler; |
| chr->chr_accept_input = mux_chr_accept_input; |
| /* Frontend guest-open / -close notification is not support with muxes */ |
| chr->chr_set_fe_open = NULL; |
| /* only default to opened state if we've realized the initial |
| * set of muxes |
| */ |
| chr->explicit_be_open = muxes_realized ? 0 : 1; |
| chr->is_mux = 1; |
| |
| return chr; |
| } |
| |
| |
| #ifdef _WIN32 |
| int send_all(int fd, const void *buf, int len1) |
| { |
| int ret, len; |
| |
| len = len1; |
| while (len > 0) { |
| ret = send(fd, buf, len, 0); |
| if (ret < 0) { |
| errno = WSAGetLastError(); |
| if (errno != WSAEWOULDBLOCK) { |
| return -1; |
| } |
| } else if (ret == 0) { |
| break; |
| } else { |
| buf += ret; |
| len -= ret; |
| } |
| } |
| return len1 - len; |
| } |
| |
| #else |
| |
| int send_all(int fd, const void *_buf, int len1) |
| { |
| int ret, len; |
| const uint8_t *buf = _buf; |
| |
| len = len1; |
| while (len > 0) { |
| ret = write(fd, buf, len); |
| if (ret < 0) { |
| if (errno != EINTR && errno != EAGAIN) |
| return -1; |
| } else if (ret == 0) { |
| break; |
| } else { |
| buf += ret; |
| len -= ret; |
| } |
| } |
| return len1 - len; |
| } |
| |
| int recv_all(int fd, void *_buf, int len1, bool single_read) |
| { |
| int ret, len; |
| uint8_t *buf = _buf; |
| |
| len = len1; |
| while ((len > 0) && (ret = read(fd, buf, len)) != 0) { |
| if (ret < 0) { |
| if (errno != EINTR && errno != EAGAIN) { |
| return -1; |
| } |
| continue; |
| } else { |
| if (single_read) { |
| return ret; |
| } |
| buf += ret; |
| len -= ret; |
| } |
| } |
| return len1 - len; |
| } |
| |
| #endif /* !_WIN32 */ |
| |
| typedef struct IOWatchPoll |
| { |
| GSource parent; |
| |
| GIOChannel *channel; |
| GSource *src; |
| |
| IOCanReadHandler *fd_can_read; |
| GSourceFunc fd_read; |
| void *opaque; |
| } IOWatchPoll; |
| |
| static IOWatchPoll *io_watch_poll_from_source(GSource *source) |
| { |
| return container_of(source, IOWatchPoll, parent); |
| } |
| |
| static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_) |
| { |
| IOWatchPoll *iwp = io_watch_poll_from_source(source); |
| bool now_active = iwp->fd_can_read(iwp->opaque) > 0; |
| bool was_active = iwp->src != NULL; |
| if (was_active == now_active) { |
| return FALSE; |
| } |
| |
| if (now_active) { |
| iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP); |
| g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL); |
| g_source_attach(iwp->src, NULL); |
| } else { |
| g_source_destroy(iwp->src); |
| g_source_unref(iwp->src); |
| iwp->src = NULL; |
| } |
| return FALSE; |
| } |
| |
| static gboolean io_watch_poll_check(GSource *source) |
| { |
| return FALSE; |
| } |
| |
| static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback, |
| gpointer user_data) |
| { |
| abort(); |
| } |
| |
| static void io_watch_poll_finalize(GSource *source) |
| { |
| /* Due to a glib bug, removing the last reference to a source |
| * inside a finalize callback causes recursive locking (and a |
| * deadlock). This is not a problem inside other callbacks, |
| * including dispatch callbacks, so we call io_remove_watch_poll |
| * to remove this source. At this point, iwp->src must |
| * be NULL, or we would leak it. |
| * |
| * This would be solved much more elegantly by child sources, |
| * but we support older glib versions that do not have them. |
| */ |
| IOWatchPoll *iwp = io_watch_poll_from_source(source); |
| assert(iwp->src == NULL); |
| } |
| |
| static GSourceFuncs io_watch_poll_funcs = { |
| .prepare = io_watch_poll_prepare, |
| .check = io_watch_poll_check, |
| .dispatch = io_watch_poll_dispatch, |
| .finalize = io_watch_poll_finalize, |
| }; |
| |
| /* Can only be used for read */ |
| static guint io_add_watch_poll(GIOChannel *channel, |
| IOCanReadHandler *fd_can_read, |
| GIOFunc fd_read, |
| gpointer user_data) |
| { |
| IOWatchPoll *iwp; |
| int tag; |
| |
| iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll)); |
| iwp->fd_can_read = fd_can_read; |
| iwp->opaque = user_data; |
| iwp->channel = channel; |
| iwp->fd_read = (GSourceFunc) fd_read; |
| iwp->src = NULL; |
| |
| tag = g_source_attach(&iwp->parent, NULL); |
| g_source_unref(&iwp->parent); |
| return tag; |
| } |
| |
| static void io_remove_watch_poll(guint tag) |
| { |
| GSource *source; |
| IOWatchPoll *iwp; |
| |
| g_return_if_fail (tag > 0); |
| |
| source = g_main_context_find_source_by_id(NULL, tag); |
| g_return_if_fail (source != NULL); |
| |
| iwp = io_watch_poll_from_source(source); |
| if (iwp->src) { |
| g_source_destroy(iwp->src); |
| g_source_unref(iwp->src); |
| iwp->src = NULL; |
| } |
| g_source_destroy(&iwp->parent); |
| } |
| |
| static void remove_fd_in_watch(CharDriverState *chr) |
| { |
| if (chr->fd_in_tag) { |
| io_remove_watch_poll(chr->fd_in_tag); |
| chr->fd_in_tag = 0; |
| } |
| } |
| |
| #ifndef _WIN32 |
| static GIOChannel *io_channel_from_fd(int fd) |
| { |
| GIOChannel *chan; |
| |
| if (fd == -1) { |
| return NULL; |
| } |
| |
| chan = g_io_channel_unix_new(fd); |
| |
| g_io_channel_set_encoding(chan, NULL, NULL); |
| g_io_channel_set_buffered(chan, FALSE); |
| |
| return chan; |
| } |
| #endif |
| |
| static GIOChannel *io_channel_from_socket(int fd) |
| { |
| GIOChannel *chan; |
| |
| if (fd == -1) { |
| return NULL; |
| } |
| |
| #ifdef _WIN32 |
| chan = g_io_channel_win32_new_socket(fd); |
| #else |
| chan = g_io_channel_unix_new(fd); |
| #endif |
| |
| g_io_channel_set_encoding(chan, NULL, NULL); |
| g_io_channel_set_buffered(chan, FALSE); |
| |
| return chan; |
| } |
| |
| static int io_channel_send(GIOChannel *fd, const void *buf, size_t len) |
| { |
| size_t offset = 0; |
| GIOStatus status = G_IO_STATUS_NORMAL; |
| |
| while (offset < len && status == G_IO_STATUS_NORMAL) { |
| gsize bytes_written = 0; |
| |
| status = g_io_channel_write_chars(fd, buf + offset, len - offset, |
| &bytes_written, NULL); |
| offset += bytes_written; |
| } |
| |
| if (offset > 0) { |
| return offset; |
| } |
| switch (status) { |
| case G_IO_STATUS_NORMAL: |
| g_assert(len == 0); |
| return 0; |
| case G_IO_STATUS_AGAIN: |
| errno = EAGAIN; |
| return -1; |
| default: |
| break; |
| } |
| errno = EINVAL; |
| return -1; |
| } |
| |
| #ifndef _WIN32 |
| |
| typedef struct FDCharDriver { |
| CharDriverState *chr; |
| GIOChannel *fd_in, *fd_out; |
| int max_size; |
| QTAILQ_ENTRY(FDCharDriver) node; |
| } FDCharDriver; |
| |
| static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| FDCharDriver *s = chr->opaque; |
| |
| return io_channel_send(s->fd_out, buf, len); |
| } |
| |
| static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| FDCharDriver *s = chr->opaque; |
| int len; |
| uint8_t buf[READ_BUF_LEN]; |
| GIOStatus status; |
| gsize bytes_read; |
| |
| len = sizeof(buf); |
| if (len > s->max_size) { |
| len = s->max_size; |
| } |
| if (len == 0) { |
| return TRUE; |
| } |
| |
| status = g_io_channel_read_chars(chan, (gchar *)buf, |
| len, &bytes_read, NULL); |
| if (status == G_IO_STATUS_EOF) { |
| remove_fd_in_watch(chr); |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| return FALSE; |
| } |
| if (status == G_IO_STATUS_NORMAL) { |
| qemu_chr_be_write(chr, buf, bytes_read); |
| } |
| |
| return TRUE; |
| } |
| |
| static int fd_chr_read_poll(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| FDCharDriver *s = chr->opaque; |
| |
| s->max_size = qemu_chr_be_can_write(chr); |
| return s->max_size; |
| } |
| |
| static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond) |
| { |
| FDCharDriver *s = chr->opaque; |
| return g_io_create_watch(s->fd_out, cond); |
| } |
| |
| static void fd_chr_update_read_handler(CharDriverState *chr) |
| { |
| FDCharDriver *s = chr->opaque; |
| |
| remove_fd_in_watch(chr); |
| if (s->fd_in) { |
| chr->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, |
| fd_chr_read, chr); |
| } |
| } |
| |
| static void fd_chr_close(struct CharDriverState *chr) |
| { |
| FDCharDriver *s = chr->opaque; |
| |
| remove_fd_in_watch(chr); |
| if (s->fd_in) { |
| g_io_channel_unref(s->fd_in); |
| } |
| if (s->fd_out) { |
| g_io_channel_unref(s->fd_out); |
| } |
| |
| g_free(s); |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } |
| |
| /* open a character device to a unix fd */ |
| static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out) |
| { |
| CharDriverState *chr; |
| FDCharDriver *s; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(FDCharDriver)); |
| s->fd_in = io_channel_from_fd(fd_in); |
| s->fd_out = io_channel_from_fd(fd_out); |
| fcntl(fd_out, F_SETFL, O_NONBLOCK); |
| s->chr = chr; |
| chr->opaque = s; |
| chr->chr_add_watch = fd_chr_add_watch; |
| chr->chr_write = fd_chr_write; |
| chr->chr_update_read_handler = fd_chr_update_read_handler; |
| chr->chr_close = fd_chr_close; |
| |
| return chr; |
| } |
| |
| static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts) |
| { |
| int fd_in, fd_out; |
| char filename_in[256], filename_out[256]; |
| const char *filename = opts->device; |
| |
| if (filename == NULL) { |
| fprintf(stderr, "chardev: pipe: no filename given\n"); |
| return NULL; |
| } |
| |
| snprintf(filename_in, 256, "%s.in", filename); |
| snprintf(filename_out, 256, "%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)); |
| 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) { |
| return NULL; |
| } |
| } |
| return qemu_chr_open_fd(fd_in, fd_out); |
| } |
| |
| /* init terminal so that we can grab keys */ |
| static struct termios oldtty; |
| static int old_fd0_flags; |
| static bool stdio_allow_signal; |
| |
| static void term_exit(void) |
| { |
| tcsetattr (0, TCSANOW, &oldtty); |
| fcntl(0, F_SETFL, old_fd0_flags); |
| } |
| |
| static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo) |
| { |
| struct termios tty; |
| |
| tty = oldtty; |
| if (!echo) { |
| tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
| |INLCR|IGNCR|ICRNL|IXON); |
| tty.c_oflag |= OPOST; |
| tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
| tty.c_cflag &= ~(CSIZE|PARENB); |
| tty.c_cflag |= CS8; |
| tty.c_cc[VMIN] = 1; |
| tty.c_cc[VTIME] = 0; |
| } |
| if (!stdio_allow_signal) |
| tty.c_lflag &= ~ISIG; |
| |
| tcsetattr (0, TCSANOW, &tty); |
| } |
| |
| static void qemu_chr_close_stdio(struct CharDriverState *chr) |
| { |
| term_exit(); |
| fd_chr_close(chr); |
| } |
| |
| static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts) |
| { |
| CharDriverState *chr; |
| |
| if (is_daemonized()) { |
| error_report("cannot use stdio with -daemonize"); |
| return NULL; |
| } |
| old_fd0_flags = fcntl(0, F_GETFL); |
| tcgetattr (0, &oldtty); |
| fcntl(0, F_SETFL, O_NONBLOCK); |
| atexit(term_exit); |
| |
| chr = qemu_chr_open_fd(0, 1); |
| chr->chr_close = qemu_chr_close_stdio; |
| chr->chr_set_echo = qemu_chr_set_echo_stdio; |
| if (opts->has_signal) { |
| stdio_allow_signal = opts->signal; |
| } |
| qemu_chr_fe_set_echo(chr, false); |
| |
| return chr; |
| } |
| |
| #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ |
| || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ |
| || defined(__GLIBC__) |
| |
| #define HAVE_CHARDEV_TTY 1 |
| |
| typedef struct { |
| GIOChannel *fd; |
| int connected; |
| int read_bytes; |
| guint timer_tag; |
| } PtyCharDriver; |
| |
| static void pty_chr_update_read_handler(CharDriverState *chr); |
| static void pty_chr_state(CharDriverState *chr, int connected); |
| |
| static gboolean pty_chr_timer(gpointer opaque) |
| { |
| struct CharDriverState *chr = opaque; |
| PtyCharDriver *s = chr->opaque; |
| |
| s->timer_tag = 0; |
| if (!s->connected) { |
| /* Next poll ... */ |
| pty_chr_update_read_handler(chr); |
| } |
| return FALSE; |
| } |
| |
| static void pty_chr_rearm_timer(CharDriverState *chr, int ms) |
| { |
| PtyCharDriver *s = chr->opaque; |
| |
| if (s->timer_tag) { |
| g_source_remove(s->timer_tag); |
| s->timer_tag = 0; |
| } |
| |
| if (ms == 1000) { |
| s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr); |
| } else { |
| s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr); |
| } |
| } |
| |
| static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| PtyCharDriver *s = chr->opaque; |
| |
| if (!s->connected) { |
| /* guest sends data, check for (re-)connect */ |
| pty_chr_update_read_handler(chr); |
| return 0; |
| } |
| return io_channel_send(s->fd, buf, len); |
| } |
| |
| static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond) |
| { |
| PtyCharDriver *s = chr->opaque; |
| return g_io_create_watch(s->fd, cond); |
| } |
| |
| static int pty_chr_read_poll(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| PtyCharDriver *s = chr->opaque; |
| |
| s->read_bytes = qemu_chr_be_can_write(chr); |
| return s->read_bytes; |
| } |
| |
| static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| PtyCharDriver *s = chr->opaque; |
| gsize size, len; |
| uint8_t buf[READ_BUF_LEN]; |
| GIOStatus status; |
| |
| len = sizeof(buf); |
| if (len > s->read_bytes) |
| len = s->read_bytes; |
| if (len == 0) { |
| return TRUE; |
| } |
| status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL); |
| if (status != G_IO_STATUS_NORMAL) { |
| pty_chr_state(chr, 0); |
| return FALSE; |
| } else { |
| pty_chr_state(chr, 1); |
| qemu_chr_be_write(chr, buf, size); |
| } |
| return TRUE; |
| } |
| |
| static void pty_chr_update_read_handler(CharDriverState *chr) |
| { |
| PtyCharDriver *s = chr->opaque; |
| GPollFD pfd; |
| |
| pfd.fd = g_io_channel_unix_get_fd(s->fd); |
| pfd.events = G_IO_OUT; |
| pfd.revents = 0; |
| g_poll(&pfd, 1, 0); |
| if (pfd.revents & G_IO_HUP) { |
| pty_chr_state(chr, 0); |
| } else { |
| pty_chr_state(chr, 1); |
| } |
| } |
| |
| static void pty_chr_state(CharDriverState *chr, int connected) |
| { |
| PtyCharDriver *s = chr->opaque; |
| |
| if (!connected) { |
| remove_fd_in_watch(chr); |
| s->connected = 0; |
| /* (re-)connect poll interval for idle guests: once per second. |
| * We check more frequently in case the guests sends data to |
| * the virtual device linked to our pty. */ |
| pty_chr_rearm_timer(chr, 1000); |
| } else { |
| if (s->timer_tag) { |
| g_source_remove(s->timer_tag); |
| s->timer_tag = 0; |
| } |
| if (!s->connected) { |
| s->connected = 1; |
| qemu_chr_be_generic_open(chr); |
| } |
| if (!chr->fd_in_tag) { |
| chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, |
| pty_chr_read, chr); |
| } |
| } |
| } |
| |
| static void pty_chr_close(struct CharDriverState *chr) |
| { |
| PtyCharDriver *s = chr->opaque; |
| int fd; |
| |
| remove_fd_in_watch(chr); |
| fd = g_io_channel_unix_get_fd(s->fd); |
| g_io_channel_unref(s->fd); |
| close(fd); |
| if (s->timer_tag) { |
| g_source_remove(s->timer_tag); |
| s->timer_tag = 0; |
| } |
| g_free(s); |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } |
| |
| static CharDriverState *qemu_chr_open_pty(const char *id, |
| ChardevReturn *ret) |
| { |
| CharDriverState *chr; |
| PtyCharDriver *s; |
| int master_fd, slave_fd; |
| char pty_name[PATH_MAX]; |
| |
| master_fd = qemu_openpty_raw(&slave_fd, pty_name); |
| if (master_fd < 0) { |
| return NULL; |
| } |
| |
| close(slave_fd); |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| |
| chr->filename = g_strdup_printf("pty:%s", pty_name); |
| ret->pty = g_strdup(pty_name); |
| ret->has_pty = true; |
| |
| fprintf(stderr, "char device redirected to %s (label %s)\n", |
| pty_name, id); |
| |
| s = g_malloc0(sizeof(PtyCharDriver)); |
| chr->opaque = s; |
| chr->chr_write = pty_chr_write; |
| chr->chr_update_read_handler = pty_chr_update_read_handler; |
| chr->chr_close = pty_chr_close; |
| chr->chr_add_watch = pty_chr_add_watch; |
| chr->explicit_be_open = true; |
| |
| s->fd = io_channel_from_fd(master_fd); |
| s->timer_tag = 0; |
| |
| return chr; |
| } |
| |
| static void tty_serial_init(int fd, int speed, |
| int parity, int data_bits, int stop_bits) |
| { |
| struct termios tty; |
| speed_t spd; |
| |
| #if 0 |
| printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n", |
| speed, parity, data_bits, stop_bits); |
| #endif |
| tcgetattr (fd, &tty); |
| |
| #define check_speed(val) if (speed <= val) { spd = B##val; break; } |
| speed = speed * 10 / 11; |
| do { |
| check_speed(50); |
| check_speed(75); |
| check_speed(110); |
| check_speed(134); |
| check_speed(150); |
| check_speed(200); |
| check_speed(300); |
| check_speed(600); |
| check_speed(1200); |
| check_speed(1800); |
| check_speed(2400); |
| check_speed(4800); |
| check_speed(9600); |
| check_speed(19200); |
| check_speed(38400); |
| /* Non-Posix values follow. They may be unsupported on some systems. */ |
| check_speed(57600); |
| check_speed(115200); |
| #ifdef B230400 |
| check_speed(230400); |
| #endif |
| #ifdef B460800 |
| check_speed(460800); |
| #endif |
| #ifdef B500000 |
| check_speed(500000); |
| #endif |
| #ifdef B576000 |
| check_speed(576000); |
| #endif |
| #ifdef B921600 |
| check_speed(921600); |
| #endif |
| #ifdef B1000000 |
| check_speed(1000000); |
| #endif |
| #ifdef B1152000 |
| check_speed(1152000); |
| #endif |
| #ifdef B1500000 |
| check_speed(1500000); |
| #endif |
| #ifdef B2000000 |
| check_speed(2000000); |
| #endif |
| #ifdef B2500000 |
| check_speed(2500000); |
| #endif |
| #ifdef B3000000 |
| check_speed(3000000); |
| #endif |
| #ifdef B3500000 |
| check_speed(3500000); |
| #endif |
| #ifdef B4000000 |
| check_speed(4000000); |
| #endif |
| spd = B115200; |
| } while (0); |
| |
| cfsetispeed(&tty, spd); |
| cfsetospeed(&tty, spd); |
| |
| tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
| |INLCR|IGNCR|ICRNL|IXON); |
| tty.c_oflag |= OPOST; |
| tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG); |
| tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB); |
| switch(data_bits) { |
| default: |
| case 8: |
| tty.c_cflag |= CS8; |
| break; |
| case 7: |
| tty.c_cflag |= CS7; |
| break; |
| case 6: |
| tty.c_cflag |= CS6; |
| break; |
| case 5: |
| tty.c_cflag |= CS5; |
| break; |
| } |
| switch(parity) { |
| default: |
| case 'N': |
| break; |
| case 'E': |
| tty.c_cflag |= PARENB; |
| break; |
| case 'O': |
| tty.c_cflag |= PARENB | PARODD; |
| break; |
| } |
| if (stop_bits == 2) |
| tty.c_cflag |= CSTOPB; |
| |
| tcsetattr (fd, TCSANOW, &tty); |
| } |
| |
| static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg) |
| { |
| FDCharDriver *s = chr->opaque; |
| |
| switch(cmd) { |
| case CHR_IOCTL_SERIAL_SET_PARAMS: |
| { |
| QEMUSerialSetParams *ssp = arg; |
| tty_serial_init(g_io_channel_unix_get_fd(s->fd_in), |
| ssp->speed, ssp->parity, |
| ssp->data_bits, ssp->stop_bits); |
| } |
| break; |
| case CHR_IOCTL_SERIAL_SET_BREAK: |
| { |
| int enable = *(int *)arg; |
| if (enable) { |
| tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1); |
| } |
| } |
| break; |
| case CHR_IOCTL_SERIAL_GET_TIOCM: |
| { |
| int sarg = 0; |
| int *targ = (int *)arg; |
| ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg); |
| *targ = 0; |
| if (sarg & TIOCM_CTS) |
| *targ |= CHR_TIOCM_CTS; |
| if (sarg & TIOCM_CAR) |
| *targ |= CHR_TIOCM_CAR; |
| if (sarg & TIOCM_DSR) |
| *targ |= CHR_TIOCM_DSR; |
| if (sarg & TIOCM_RI) |
| *targ |= CHR_TIOCM_RI; |
| if (sarg & TIOCM_DTR) |
| *targ |= CHR_TIOCM_DTR; |
| if (sarg & TIOCM_RTS) |
| *targ |= CHR_TIOCM_RTS; |
| } |
| break; |
| case CHR_IOCTL_SERIAL_SET_TIOCM: |
| { |
| int sarg = *(int *)arg; |
| int targ = 0; |
| ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ); |
| targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR |
| | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS); |
| if (sarg & CHR_TIOCM_CTS) |
| targ |= TIOCM_CTS; |
| if (sarg & CHR_TIOCM_CAR) |
| targ |= TIOCM_CAR; |
| if (sarg & CHR_TIOCM_DSR) |
| targ |= TIOCM_DSR; |
| if (sarg & CHR_TIOCM_RI) |
| targ |= TIOCM_RI; |
| if (sarg & CHR_TIOCM_DTR) |
| targ |= TIOCM_DTR; |
| if (sarg & CHR_TIOCM_RTS) |
| targ |= TIOCM_RTS; |
| ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ); |
| } |
| break; |
| default: |
| return -ENOTSUP; |
| } |
| return 0; |
| } |
| |
| static void qemu_chr_close_tty(CharDriverState *chr) |
| { |
| FDCharDriver *s = chr->opaque; |
| int fd = -1; |
| |
| if (s) { |
| fd = g_io_channel_unix_get_fd(s->fd_in); |
| } |
| |
| fd_chr_close(chr); |
| |
| if (fd >= 0) { |
| close(fd); |
| } |
| } |
| |
| static CharDriverState *qemu_chr_open_tty_fd(int fd) |
| { |
| CharDriverState *chr; |
| |
| tty_serial_init(fd, 115200, 'N', 8, 1); |
| chr = qemu_chr_open_fd(fd, fd); |
| chr->chr_ioctl = tty_serial_ioctl; |
| chr->chr_close = qemu_chr_close_tty; |
| return chr; |
| } |
| #endif /* __linux__ || __sun__ */ |
| |
| #if defined(__linux__) |
| |
| #define HAVE_CHARDEV_PARPORT 1 |
| |
| typedef struct { |
| int fd; |
| int mode; |
| } ParallelCharDriver; |
| |
| static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode) |
| { |
| if (s->mode != mode) { |
| int m = mode; |
| if (ioctl(s->fd, PPSETMODE, &m) < 0) |
| return 0; |
| s->mode = mode; |
| } |
| return 1; |
| } |
| |
| static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) |
| { |
| ParallelCharDriver *drv = chr->opaque; |
| int fd = drv->fd; |
| uint8_t b; |
| |
| switch(cmd) { |
| case CHR_IOCTL_PP_READ_DATA: |
| if (ioctl(fd, PPRDATA, &b) < 0) |
| return -ENOTSUP; |
| *(uint8_t *)arg = b; |
| break; |
| case CHR_IOCTL_PP_WRITE_DATA: |
| b = *(uint8_t *)arg; |
| if (ioctl(fd, PPWDATA, &b) < 0) |
| return -ENOTSUP; |
| break; |
| case CHR_IOCTL_PP_READ_CONTROL: |
| if (ioctl(fd, PPRCONTROL, &b) < 0) |
| return -ENOTSUP; |
| /* Linux gives only the lowest bits, and no way to know data |
| direction! For better compatibility set the fixed upper |
| bits. */ |
| *(uint8_t *)arg = b | 0xc0; |
| break; |
| case CHR_IOCTL_PP_WRITE_CONTROL: |
| b = *(uint8_t *)arg; |
| if (ioctl(fd, PPWCONTROL, &b) < 0) |
| return -ENOTSUP; |
| break; |
| case CHR_IOCTL_PP_READ_STATUS: |
| if (ioctl(fd, PPRSTATUS, &b) < 0) |
| return -ENOTSUP; |
| *(uint8_t *)arg = b; |
| break; |
| case CHR_IOCTL_PP_DATA_DIR: |
| if (ioctl(fd, PPDATADIR, (int *)arg) < 0) |
| return -ENOTSUP; |
| break; |
| case CHR_IOCTL_PP_EPP_READ_ADDR: |
| if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) { |
| struct ParallelIOArg *parg = arg; |
| int n = read(fd, parg->buffer, parg->count); |
| if (n != parg->count) { |
| return -EIO; |
| } |
| } |
| break; |
| case CHR_IOCTL_PP_EPP_READ: |
| if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) { |
| struct ParallelIOArg *parg = arg; |
| int n = read(fd, parg->buffer, parg->count); |
| if (n != parg->count) { |
| return -EIO; |
| } |
| } |
| break; |
| case CHR_IOCTL_PP_EPP_WRITE_ADDR: |
| if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) { |
| struct ParallelIOArg *parg = arg; |
| int n = write(fd, parg->buffer, parg->count); |
| if (n != parg->count) { |
| return -EIO; |
| } |
| } |
| break; |
| case CHR_IOCTL_PP_EPP_WRITE: |
| if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) { |
| struct ParallelIOArg *parg = arg; |
| int n = write(fd, parg->buffer, parg->count); |
| if (n != parg->count) { |
| return -EIO; |
| } |
| } |
| break; |
| default: |
| return -ENOTSUP; |
| } |
| return 0; |
| } |
| |
| static void pp_close(CharDriverState *chr) |
| { |
| ParallelCharDriver *drv = chr->opaque; |
| int fd = drv->fd; |
| |
| pp_hw_mode(drv, IEEE1284_MODE_COMPAT); |
| ioctl(fd, PPRELEASE); |
| close(fd); |
| g_free(drv); |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } |
| |
| static CharDriverState *qemu_chr_open_pp_fd(int fd) |
| { |
| CharDriverState *chr; |
| ParallelCharDriver *drv; |
| |
| if (ioctl(fd, PPCLAIM) < 0) { |
| close(fd); |
| return NULL; |
| } |
| |
| drv = g_malloc0(sizeof(ParallelCharDriver)); |
| drv->fd = fd; |
| drv->mode = IEEE1284_MODE_COMPAT; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| chr->chr_write = null_chr_write; |
| chr->chr_ioctl = pp_ioctl; |
| chr->chr_close = pp_close; |
| chr->opaque = drv; |
| |
| return chr; |
| } |
| #endif /* __linux__ */ |
| |
| #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) |
| |
| #define HAVE_CHARDEV_PARPORT 1 |
| |
| static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) |
| { |
| int fd = (int)(intptr_t)chr->opaque; |
| uint8_t b; |
| |
| switch(cmd) { |
| case CHR_IOCTL_PP_READ_DATA: |
| if (ioctl(fd, PPIGDATA, &b) < 0) |
| return -ENOTSUP; |
| *(uint8_t *)arg = b; |
| break; |
| case CHR_IOCTL_PP_WRITE_DATA: |
| b = *(uint8_t *)arg; |
| if (ioctl(fd, PPISDATA, &b) < 0) |
| return -ENOTSUP; |
| break; |
| case CHR_IOCTL_PP_READ_CONTROL: |
| if (ioctl(fd, PPIGCTRL, &b) < 0) |
| return -ENOTSUP; |
| *(uint8_t *)arg = b; |
| break; |
| case CHR_IOCTL_PP_WRITE_CONTROL: |
| b = *(uint8_t *)arg; |
| if (ioctl(fd, PPISCTRL, &b) < 0) |
| return -ENOTSUP; |
| break; |
| case CHR_IOCTL_PP_READ_STATUS: |
| if (ioctl(fd, PPIGSTATUS, &b) < 0) |
| return -ENOTSUP; |
| *(uint8_t *)arg = b; |
| break; |
| default: |
| return -ENOTSUP; |
| } |
| return 0; |
| } |
| |
| static CharDriverState *qemu_chr_open_pp_fd(int fd) |
| { |
| CharDriverState *chr; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| chr->opaque = (void *)(intptr_t)fd; |
| chr->chr_write = null_chr_write; |
| chr->chr_ioctl = pp_ioctl; |
| chr->explicit_be_open = true; |
| return chr; |
| } |
| #endif |
| |
| #else /* _WIN32 */ |
| |
| typedef struct { |
| int max_size; |
| HANDLE hcom, hrecv, hsend; |
| OVERLAPPED orecv, osend; |
| BOOL fpipe; |
| DWORD len; |
| } WinCharState; |
| |
| typedef struct { |
| HANDLE hStdIn; |
| HANDLE hInputReadyEvent; |
| HANDLE hInputDoneEvent; |
| HANDLE hInputThread; |
| uint8_t win_stdio_buf; |
| } WinStdioCharState; |
| |
| #define NSENDBUF 2048 |
| #define NRECVBUF 2048 |
| #define MAXCONNECT 1 |
| #define NTIMEOUT 5000 |
| |
| static int win_chr_poll(void *opaque); |
| static int win_chr_pipe_poll(void *opaque); |
| |
| static void win_chr_close(CharDriverState *chr) |
| { |
| WinCharState *s = chr->opaque; |
| |
| if (s->hsend) { |
| CloseHandle(s->hsend); |
| s->hsend = NULL; |
| } |
| if (s->hrecv) { |
| CloseHandle(s->hrecv); |
| s->hrecv = NULL; |
| } |
| if (s->hcom) { |
| CloseHandle(s->hcom); |
| s->hcom = NULL; |
| } |
| if (s->fpipe) |
| qemu_del_polling_cb(win_chr_pipe_poll, chr); |
| else |
| qemu_del_polling_cb(win_chr_poll, chr); |
| |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } |
| |
| static int win_chr_init(CharDriverState *chr, const char *filename) |
| { |
| WinCharState *s = chr->opaque; |
| COMMCONFIG comcfg; |
| COMMTIMEOUTS cto = { 0, 0, 0, 0, 0}; |
| COMSTAT comstat; |
| DWORD size; |
| DWORD err; |
| |
| s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); |
| if (!s->hsend) { |
| fprintf(stderr, "Failed CreateEvent\n"); |
| goto fail; |
| } |
| s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); |
| if (!s->hrecv) { |
| fprintf(stderr, "Failed CreateEvent\n"); |
| goto fail; |
| } |
| |
| s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, |
| OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); |
| if (s->hcom == INVALID_HANDLE_VALUE) { |
| fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError()); |
| s->hcom = NULL; |
| goto fail; |
| } |
| |
| if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) { |
| fprintf(stderr, "Failed SetupComm\n"); |
| goto fail; |
| } |
| |
| ZeroMemory(&comcfg, sizeof(COMMCONFIG)); |
| size = sizeof(COMMCONFIG); |
| GetDefaultCommConfig(filename, &comcfg, &size); |
| comcfg.dcb.DCBlength = sizeof(DCB); |
| CommConfigDialog(filename, NULL, &comcfg); |
| |
| if (!SetCommState(s->hcom, &comcfg.dcb)) { |
| fprintf(stderr, "Failed SetCommState\n"); |
| goto fail; |
| } |
| |
| if (!SetCommMask(s->hcom, EV_ERR)) { |
| fprintf(stderr, "Failed SetCommMask\n"); |
| goto fail; |
| } |
| |
| cto.ReadIntervalTimeout = MAXDWORD; |
| if (!SetCommTimeouts(s->hcom, &cto)) { |
| fprintf(stderr, "Failed SetCommTimeouts\n"); |
| goto fail; |
| } |
| |
| if (!ClearCommError(s->hcom, &err, &comstat)) { |
| fprintf(stderr, "Failed ClearCommError\n"); |
| goto fail; |
| } |
| qemu_add_polling_cb(win_chr_poll, chr); |
| return 0; |
| |
| fail: |
| win_chr_close(chr); |
| return -1; |
| } |
| |
| static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1) |
| { |
| WinCharState *s = chr->opaque; |
| DWORD len, ret, size, err; |
| |
| len = len1; |
| ZeroMemory(&s->osend, sizeof(s->osend)); |
| s->osend.hEvent = s->hsend; |
| while (len > 0) { |
| if (s->hsend) |
| ret = WriteFile(s->hcom, buf, len, &size, &s->osend); |
| else |
| ret = WriteFile(s->hcom, buf, len, &size, NULL); |
| if (!ret) { |
| err = GetLastError(); |
| if (err == ERROR_IO_PENDING) { |
| ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE); |
| if (ret) { |
| buf += size; |
| len -= size; |
| } else { |
| break; |
| } |
| } else { |
| break; |
| } |
| } else { |
| buf += size; |
| len -= size; |
| } |
| } |
| return len1 - len; |
| } |
| |
| static int win_chr_read_poll(CharDriverState *chr) |
| { |
| WinCharState *s = chr->opaque; |
| |
| s->max_size = qemu_chr_be_can_write(chr); |
| return s->max_size; |
| } |
| |
| static void win_chr_readfile(CharDriverState *chr) |
| { |
| WinCharState *s = chr->opaque; |
| int ret, err; |
| uint8_t buf[READ_BUF_LEN]; |
| DWORD size; |
| |
| ZeroMemory(&s->orecv, sizeof(s->orecv)); |
| s->orecv.hEvent = s->hrecv; |
| ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv); |
| if (!ret) { |
| err = GetLastError(); |
| if (err == ERROR_IO_PENDING) { |
| ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE); |
| } |
| } |
| |
| if (size > 0) { |
| qemu_chr_be_write(chr, buf, size); |
| } |
| } |
| |
| static void win_chr_read(CharDriverState *chr) |
| { |
| WinCharState *s = chr->opaque; |
| |
| if (s->len > s->max_size) |
| s->len = s->max_size; |
| if (s->len == 0) |
| return; |
| |
| win_chr_readfile(chr); |
| } |
| |
| static int win_chr_poll(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| WinCharState *s = chr->opaque; |
| COMSTAT status; |
| DWORD comerr; |
| |
| ClearCommError(s->hcom, &comerr, &status); |
| if (status.cbInQue > 0) { |
| s->len = status.cbInQue; |
| win_chr_read_poll(chr); |
| win_chr_read(chr); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static CharDriverState *qemu_chr_open_win_path(const char *filename) |
| { |
| CharDriverState *chr; |
| WinCharState *s; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(WinCharState)); |
| chr->opaque = s; |
| chr->chr_write = win_chr_write; |
| chr->chr_close = win_chr_close; |
| |
| if (win_chr_init(chr, filename) < 0) { |
| g_free(s); |
| g_free(chr); |
| return NULL; |
| } |
| return chr; |
| } |
| |
| static int win_chr_pipe_poll(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| WinCharState *s = chr->opaque; |
| DWORD size; |
| |
| PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL); |
| if (size > 0) { |
| s->len = size; |
| win_chr_read_poll(chr); |
| win_chr_read(chr); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int win_chr_pipe_init(CharDriverState *chr, const char *filename) |
| { |
| WinCharState *s = chr->opaque; |
| OVERLAPPED ov; |
| int ret; |
| DWORD size; |
| char openname[256]; |
| |
| s->fpipe = TRUE; |
| |
| s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); |
| if (!s->hsend) { |
| fprintf(stderr, "Failed CreateEvent\n"); |
| goto fail; |
| } |
| s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); |
| if (!s->hrecv) { |
| fprintf(stderr, "Failed CreateEvent\n"); |
| goto fail; |
| } |
| |
| snprintf(openname, sizeof(openname), "\\\\.\\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); |
| if (s->hcom == INVALID_HANDLE_VALUE) { |
| fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError()); |
| s->hcom = NULL; |
| goto fail; |
| } |
| |
| ZeroMemory(&ov, sizeof(ov)); |
| ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); |
| ret = ConnectNamedPipe(s->hcom, &ov); |
| if (ret) { |
| fprintf(stderr, "Failed ConnectNamedPipe\n"); |
| goto fail; |
| } |
| |
| ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE); |
| if (!ret) { |
| fprintf(stderr, "Failed GetOverlappedResult\n"); |
| 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: |
| win_chr_close(chr); |
| return -1; |
| } |
| |
| |
| static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts) |
| { |
| const char *filename = opts->device; |
| CharDriverState *chr; |
| WinCharState *s; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(WinCharState)); |
| chr->opaque = s; |
| chr->chr_write = win_chr_write; |
| chr->chr_close = win_chr_close; |
| |
| if (win_chr_pipe_init(chr, filename) < 0) { |
| g_free(s); |
| g_free(chr); |
| return NULL; |
| } |
| return chr; |
| } |
| |
| static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out) |
| { |
| CharDriverState *chr; |
| WinCharState *s; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(WinCharState)); |
| s->hcom = fd_out; |
| chr->opaque = s; |
| chr->chr_write = win_chr_write; |
| return chr; |
| } |
| |
| static CharDriverState *qemu_chr_open_win_con(void) |
| { |
| return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE)); |
| } |
| |
| static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE); |
| DWORD dwSize; |
| int len1; |
| |
| len1 = len; |
| |
| while (len1 > 0) { |
| if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) { |
| break; |
| } |
| buf += dwSize; |
| len1 -= dwSize; |
| } |
| |
| return len - len1; |
| } |
| |
| static void win_stdio_wait_func(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| WinStdioCharState *stdio = chr->opaque; |
| INPUT_RECORD buf[4]; |
| int ret; |
| DWORD dwSize; |
| int i; |
| |
| ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize); |
| |
| if (!ret) { |
| /* Avoid error storm */ |
| qemu_del_wait_object(stdio->hStdIn, NULL, NULL); |
| return; |
| } |
| |
| for (i = 0; i < dwSize; i++) { |
| KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent; |
| |
| if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) { |
| int j; |
| if (kev->uChar.AsciiChar != 0) { |
| for (j = 0; j < kev->wRepeatCount; j++) { |
| if (qemu_chr_be_can_write(chr)) { |
| uint8_t c = kev->uChar.AsciiChar; |
| qemu_chr_be_write(chr, &c, 1); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| static DWORD WINAPI win_stdio_thread(LPVOID param) |
| { |
| CharDriverState *chr = param; |
| WinStdioCharState *stdio = chr->opaque; |
| int ret; |
| DWORD dwSize; |
| |
| while (1) { |
| |
| /* Wait for one byte */ |
| ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL); |
| |
| /* Exit in case of error, continue if nothing read */ |
| if (!ret) { |
| break; |
| } |
| if (!dwSize) { |
| continue; |
| } |
| |
| /* Some terminal emulator returns \r\n for Enter, just pass \n */ |
| if (stdio->win_stdio_buf == '\r') { |
| continue; |
| } |
| |
| /* Signal the main thread and wait until the byte was eaten */ |
| if (!SetEvent(stdio->hInputReadyEvent)) { |
| break; |
| } |
| if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE) |
| != WAIT_OBJECT_0) { |
| break; |
| } |
| } |
| |
| qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL); |
| return 0; |
| } |
| |
| static void win_stdio_thread_wait_func(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| WinStdioCharState *stdio = chr->opaque; |
| |
| if (qemu_chr_be_can_write(chr)) { |
| qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1); |
| } |
| |
| SetEvent(stdio->hInputDoneEvent); |
| } |
| |
| static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo) |
| { |
| WinStdioCharState *stdio = chr->opaque; |
| DWORD dwMode = 0; |
| |
| GetConsoleMode(stdio->hStdIn, &dwMode); |
| |
| if (echo) { |
| SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT); |
| } else { |
| SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT); |
| } |
| } |
| |
| static void win_stdio_close(CharDriverState *chr) |
| { |
| WinStdioCharState *stdio = chr->opaque; |
| |
| if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) { |
| CloseHandle(stdio->hInputReadyEvent); |
| } |
| if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) { |
| CloseHandle(stdio->hInputDoneEvent); |
| } |
| if (stdio->hInputThread != INVALID_HANDLE_VALUE) { |
| TerminateThread(stdio->hInputThread, 0); |
| } |
| |
| g_free(chr->opaque); |
| g_free(chr); |
| } |
| |
| static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts) |
| { |
| CharDriverState *chr; |
| WinStdioCharState *stdio; |
| DWORD dwMode; |
| int is_console = 0; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| stdio = g_malloc0(sizeof(WinStdioCharState)); |
| |
| stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE); |
| if (stdio->hStdIn == INVALID_HANDLE_VALUE) { |
| fprintf(stderr, "cannot open stdio: invalid handle\n"); |
| exit(1); |
| } |
| |
| is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0; |
| |
| chr->opaque = stdio; |
| chr->chr_write = win_stdio_write; |
| chr->chr_close = win_stdio_close; |
| |
| if (is_console) { |
| if (qemu_add_wait_object(stdio->hStdIn, |
| win_stdio_wait_func, chr)) { |
| fprintf(stderr, "qemu_add_wait_object: failed\n"); |
| } |
| } else { |
| DWORD dwId; |
| |
| stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); |
| stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL); |
| stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread, |
| chr, 0, &dwId); |
| |
| if (stdio->hInputThread == INVALID_HANDLE_VALUE |
| || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE |
| || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) { |
| fprintf(stderr, "cannot create stdio thread or event\n"); |
| exit(1); |
| } |
| if (qemu_add_wait_object(stdio->hInputReadyEvent, |
| win_stdio_thread_wait_func, chr)) { |
| fprintf(stderr, "qemu_add_wait_object: failed\n"); |
| } |
| } |
| |
| dwMode |= ENABLE_LINE_INPUT; |
| |
| if (is_console) { |
| /* set the terminal in raw mode */ |
| /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */ |
| dwMode |= ENABLE_PROCESSED_INPUT; |
| } |
| |
| SetConsoleMode(stdio->hStdIn, dwMode); |
| |
| chr->chr_set_echo = qemu_chr_set_echo_win_stdio; |
| qemu_chr_fe_set_echo(chr, false); |
| |
| return chr; |
| } |
| #endif /* !_WIN32 */ |
| |
| |
| /***********************************************************/ |
| /* UDP Net console */ |
| |
| typedef struct { |
| int fd; |
| GIOChannel *chan; |
| uint8_t buf[READ_BUF_LEN]; |
| int bufcnt; |
| int bufptr; |
| int max_size; |
| } NetCharDriver; |
| |
| static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| NetCharDriver *s = chr->opaque; |
| gsize bytes_written; |
| GIOStatus status; |
| |
| status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL); |
| if (status == G_IO_STATUS_EOF) { |
| return 0; |
| } else if (status != G_IO_STATUS_NORMAL) { |
| return -1; |
| } |
| |
| return bytes_written; |
| } |
| |
| static int udp_chr_read_poll(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| NetCharDriver *s = chr->opaque; |
| |
| s->max_size = qemu_chr_be_can_write(chr); |
| |
| /* If there were any stray characters in the queue process them |
| * first |
| */ |
| while (s->max_size > 0 && s->bufptr < s->bufcnt) { |
| qemu_chr_be_write(chr, &s->buf[s->bufptr], 1); |
| s->bufptr++; |
| s->max_size = qemu_chr_be_can_write(chr); |
| } |
| return s->max_size; |
| } |
| |
| static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| NetCharDriver *s = chr->opaque; |
| gsize bytes_read = 0; |
| GIOStatus status; |
| |
| if (s->max_size == 0) { |
| return TRUE; |
| } |
| status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf), |
| &bytes_read, NULL); |
| s->bufcnt = bytes_read; |
| s->bufptr = s->bufcnt; |
| if (status != G_IO_STATUS_NORMAL) { |
| remove_fd_in_watch(chr); |
| return FALSE; |
| } |
| |
| s->bufptr = 0; |
| while (s->max_size > 0 && s->bufptr < s->bufcnt) { |
| qemu_chr_be_write(chr, &s->buf[s->bufptr], 1); |
| s->bufptr++; |
| s->max_size = qemu_chr_be_can_write(chr); |
| } |
| |
| return TRUE; |
| } |
| |
| static void udp_chr_update_read_handler(CharDriverState *chr) |
| { |
| NetCharDriver *s = chr->opaque; |
| |
| remove_fd_in_watch(chr); |
| if (s->chan) { |
| chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll, |
| udp_chr_read, chr); |
| } |
| } |
| |
| static void udp_chr_close(CharDriverState *chr) |
| { |
| NetCharDriver *s = chr->opaque; |
| |
| remove_fd_in_watch(chr); |
| if (s->chan) { |
| g_io_channel_unref(s->chan); |
| closesocket(s->fd); |
| } |
| g_free(s); |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } |
| |
| static CharDriverState *qemu_chr_open_udp_fd(int fd) |
| { |
| CharDriverState *chr = NULL; |
| NetCharDriver *s = NULL; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(NetCharDriver)); |
| |
| s->fd = fd; |
| s->chan = io_channel_from_socket(s->fd); |
| s->bufcnt = 0; |
| s->bufptr = 0; |
| chr->opaque = s; |
| chr->chr_write = udp_chr_write; |
| chr->chr_update_read_handler = udp_chr_update_read_handler; |
| chr->chr_close = udp_chr_close; |
| /* be isn't opened until we get a connection */ |
| chr->explicit_be_open = true; |
| return chr; |
| } |
| |
| static CharDriverState *qemu_chr_open_udp(QemuOpts *opts) |
| { |
| Error *local_err = NULL; |
| int fd = -1; |
| |
| fd = inet_dgram_opts(opts, &local_err); |
| if (fd < 0) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| return NULL; |
| } |
| return qemu_chr_open_udp_fd(fd); |
| } |
| |
| /***********************************************************/ |
| /* TCP Net console */ |
| |
| typedef struct { |
| |
| GIOChannel *chan, *listen_chan; |
| guint listen_tag; |
| int fd, listen_fd; |
| int connected; |
| int max_size; |
| int do_telnetopt; |
| int do_nodelay; |
| int is_unix; |
| int msgfd; |
| } TCPCharDriver; |
| |
| static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque); |
| |
| static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| TCPCharDriver *s = chr->opaque; |
| if (s->connected) { |
| return io_channel_send(s->chan, buf, len); |
| } else { |
| /* XXX: indicate an error ? */ |
| return len; |
| } |
| } |
| |
| static int tcp_chr_read_poll(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| TCPCharDriver *s = chr->opaque; |
| if (!s->connected) |
| return 0; |
| s->max_size = qemu_chr_be_can_write(chr); |
| return s->max_size; |
| } |
| |
| #define IAC 255 |
| #define IAC_BREAK 243 |
| static void tcp_chr_process_IAC_bytes(CharDriverState *chr, |
| TCPCharDriver *s, |
| uint8_t *buf, int *size) |
| { |
| /* Handle any telnet client's basic IAC options to satisfy char by |
| * char mode with no echo. All IAC options will be removed from |
| * the buf and the do_telnetopt variable will be used to track the |
| * state of the width of the IAC information. |
| * |
| * IAC commands come in sets of 3 bytes with the exception of the |
| * "IAC BREAK" command and the double IAC. |
| */ |
| |
| int i; |
| int j = 0; |
| |
| for (i = 0; i < *size; i++) { |
| if (s->do_telnetopt > 1) { |
| if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { |
| /* Double IAC means send an IAC */ |
| if (j != i) |
| buf[j] = buf[i]; |
| j++; |
| s->do_telnetopt = 1; |
| } else { |
| if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) { |
| /* Handle IAC break commands by sending a serial break */ |
| qemu_chr_be_event(chr, CHR_EVENT_BREAK); |
| s->do_telnetopt++; |
| } |
| s->do_telnetopt++; |
| } |
| if (s->do_telnetopt >= 4) { |
| s->do_telnetopt = 1; |
| } |
| } else { |
| if ((unsigned char)buf[i] == IAC) { |
| s->do_telnetopt = 2; |
| } else { |
| if (j != i) |
| buf[j] = buf[i]; |
| j++; |
| } |
| } |
| } |
| *size = j; |
| } |
| |
| static int tcp_get_msgfd(CharDriverState *chr) |
| { |
| TCPCharDriver *s = chr->opaque; |
| int fd = s->msgfd; |
| s->msgfd = -1; |
| return fd; |
| } |
| |
| #ifndef _WIN32 |
| static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg) |
| { |
| TCPCharDriver *s = chr->opaque; |
| struct cmsghdr *cmsg; |
| |
| for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { |
| int fd; |
| |
| if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) || |
| cmsg->cmsg_level != SOL_SOCKET || |
| cmsg->cmsg_type != SCM_RIGHTS) |
| continue; |
| |
| fd = *((int *)CMSG_DATA(cmsg)); |
| if (fd < 0) |
| continue; |
| |
| /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ |
| qemu_set_block(fd); |
| |
| #ifndef MSG_CMSG_CLOEXEC |
| qemu_set_cloexec(fd); |
| #endif |
| if (s->msgfd != -1) |
| close(s->msgfd); |
| s->msgfd = fd; |
| } |
| } |
| |
| static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len) |
| { |
| TCPCharDriver *s = chr->opaque; |
| struct msghdr msg = { NULL, }; |
| struct iovec iov[1]; |
| union { |
| struct cmsghdr cmsg; |
| char control[CMSG_SPACE(sizeof(int))]; |
| } msg_control; |
| int flags = 0; |
| ssize_t ret; |
| |
| iov[0].iov_base = buf; |
| iov[0].iov_len = len; |
| |
| msg.msg_iov = iov; |
| msg.msg_iovlen = 1; |
| msg.msg_control = &msg_control; |
| msg.msg_controllen = sizeof(msg_control); |
| |
| #ifdef MSG_CMSG_CLOEXEC |
| flags |= MSG_CMSG_CLOEXEC; |
| #endif |
| ret = recvmsg(s->fd, &msg, flags); |
| if (ret > 0 && s->is_unix) { |
| unix_process_msgfd(chr, &msg); |
| } |
| |
| return ret; |
| } |
| #else |
| static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len) |
| { |
| TCPCharDriver *s = chr->opaque; |
| return qemu_recv(s->fd, buf, len, 0); |
| } |
| #endif |
| |
| static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond) |
| { |
| TCPCharDriver *s = chr->opaque; |
| return g_io_create_watch(s->chan, cond); |
| } |
| |
| static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| TCPCharDriver *s = chr->opaque; |
| uint8_t buf[READ_BUF_LEN]; |
| int len, size; |
| |
| if (!s->connected || s->max_size <= 0) { |
| return TRUE; |
| } |
| len = sizeof(buf); |
| if (len > s->max_size) |
| len = s->max_size; |
| size = tcp_chr_recv(chr, (void *)buf, len); |
| if (size == 0) { |
| /* connection closed */ |
| s->connected = 0; |
| if (s->listen_chan) { |
| s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr); |
| } |
| remove_fd_in_watch(chr); |
| g_io_channel_unref(s->chan); |
| s->chan = NULL; |
| closesocket(s->fd); |
| s->fd = -1; |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } else if (size > 0) { |
| if (s->do_telnetopt) |
| tcp_chr_process_IAC_bytes(chr, s, buf, &size); |
| if (size > 0) |
| qemu_chr_be_write(chr, buf, size); |
| } |
| |
| return TRUE; |
| } |
| |
| #ifndef _WIN32 |
| CharDriverState *qemu_chr_open_eventfd(int eventfd) |
| { |
| return qemu_chr_open_fd(eventfd, eventfd); |
| } |
| #endif |
| |
| static void tcp_chr_connect(void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| TCPCharDriver *s = chr->opaque; |
| |
| s->connected = 1; |
| if (s->chan) { |
| chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, |
| tcp_chr_read, chr); |
| } |
| qemu_chr_be_generic_open(chr); |
| } |
| |
| static void tcp_chr_update_read_handler(CharDriverState *chr) |
| { |
| TCPCharDriver *s = chr->opaque; |
| |
| remove_fd_in_watch(chr); |
| if (s->chan) { |
| chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, |
| tcp_chr_read, chr); |
| } |
| } |
| |
| #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c; |
| static void tcp_chr_telnet_init(int fd) |
| { |
| char buf[3]; |
| /* Send the telnet negotion to put telnet in binary, no echo, single char mode */ |
| IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ |
| send(fd, (char *)buf, 3, 0); |
| IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ |
| send(fd, (char *)buf, 3, 0); |
| IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ |
| send(fd, (char *)buf, 3, 0); |
| IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ |
| send(fd, (char *)buf, 3, 0); |
| } |
| |
| static int tcp_chr_add_client(CharDriverState *chr, int fd) |
| { |
| TCPCharDriver *s = chr->opaque; |
| if (s->fd != -1) |
| return -1; |
| |
| qemu_set_nonblock(fd); |
| if (s->do_nodelay) |
| socket_set_nodelay(fd); |
| s->fd = fd; |
| s->chan = io_channel_from_socket(fd); |
| if (s->listen_tag) { |
| g_source_remove(s->listen_tag); |
| s->listen_tag = 0; |
| } |
| tcp_chr_connect(chr); |
| |
| return 0; |
| } |
| |
| static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque) |
| { |
| CharDriverState *chr = opaque; |
| TCPCharDriver *s = chr->opaque; |
| struct sockaddr_in saddr; |
| #ifndef _WIN32 |
| struct sockaddr_un uaddr; |
| #endif |
| struct sockaddr *addr; |
| socklen_t len; |
| int fd; |
| |
| for(;;) { |
| #ifndef _WIN32 |
| if (s->is_unix) { |
| len = sizeof(uaddr); |
| addr = (struct sockaddr *)&uaddr; |
| } else |
| #endif |
| { |
| len = sizeof(saddr); |
| addr = (struct sockaddr *)&saddr; |
| } |
| fd = qemu_accept(s->listen_fd, addr, &len); |
| if (fd < 0 && errno != EINTR) { |
| s->listen_tag = 0; |
| return FALSE; |
| } else if (fd >= 0) { |
| if (s->do_telnetopt) |
| tcp_chr_telnet_init(fd); |
| break; |
| } |
| } |
| if (tcp_chr_add_client(chr, fd) < 0) |
| close(fd); |
| |
| return TRUE; |
| } |
| |
| static void tcp_chr_close(CharDriverState *chr) |
| { |
| TCPCharDriver *s = chr->opaque; |
| if (s->fd >= 0) { |
| remove_fd_in_watch(chr); |
| if (s->chan) { |
| g_io_channel_unref(s->chan); |
| } |
| closesocket(s->fd); |
| } |
| if (s->listen_fd >= 0) { |
| if (s->listen_tag) { |
| g_source_remove(s->listen_tag); |
| s->listen_tag = 0; |
| } |
| if (s->listen_chan) { |
| g_io_channel_unref(s->listen_chan); |
| } |
| closesocket(s->listen_fd); |
| } |
| g_free(s); |
| qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| } |
| |
| static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay, |
| bool is_listen, bool is_telnet, |
| bool is_waitconnect, |
| Error **errp) |
| { |
| CharDriverState *chr = NULL; |
| TCPCharDriver *s = NULL; |
| char host[NI_MAXHOST], serv[NI_MAXSERV]; |
| const char *left = "", *right = ""; |
| struct sockaddr_storage ss; |
| socklen_t ss_len = sizeof(ss); |
| |
| memset(&ss, 0, ss_len); |
| if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) { |
| error_setg_errno(errp, errno, "getsockname"); |
| return NULL; |
| } |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| s = g_malloc0(sizeof(TCPCharDriver)); |
| |
| s->connected = 0; |
| s->fd = -1; |
| s->listen_fd = -1; |
| s->msgfd = -1; |
| |
| chr->filename = g_malloc(256); |
| switch (ss.ss_family) { |
| #ifndef _WIN32 |
| case AF_UNIX: |
| s->is_unix = 1; |
| snprintf(chr->filename, 256, "unix:%s%s", |
| ((struct sockaddr_un *)(&ss))->sun_path, |
| is_listen ? ",server" : ""); |
| break; |
| #endif |
| case AF_INET6: |
| left = "["; |
| right = "]"; |
| /* fall through */ |
| case AF_INET: |
| s->do_nodelay = do_nodelay; |
| getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host), |
| serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV); |
| snprintf(chr->filename, 256, "%s:%s%s%s:%s%s", |
| is_telnet ? "telnet" : "tcp", |
| left, host, right, serv, |
| is_listen ? ",server" : ""); |
| break; |
| } |
| |
| chr->opaque = s; |
| chr->chr_write = tcp_chr_write; |
| chr->chr_close = tcp_chr_close; |
| chr->get_msgfd = tcp_get_msgfd; |
| chr->chr_add_client = tcp_chr_add_client; |
| chr->chr_add_watch = tcp_chr_add_watch; |
| chr->chr_update_read_handler = tcp_chr_update_read_handler; |
| /* be isn't opened until we get a connection */ |
| chr->explicit_be_open = true; |
| |
| if (is_listen) { |
| s->listen_fd = fd; |
| s->listen_chan = io_channel_from_socket(s->listen_fd); |
| s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr); |
| if (is_telnet) { |
| s->do_telnetopt = 1; |
| } |
| } else { |
| s->connected = 1; |
| s->fd = fd; |
| socket_set_nodelay(fd); |
| s->chan = io_channel_from_socket(s->fd); |
| tcp_chr_connect(chr); |
| } |
| |
| if (is_listen && is_waitconnect) { |
| fprintf(stderr, "QEMU waiting for connection on: %s\n", |
| chr->filename); |
| tcp_chr_accept(s->listen_chan, G_IO_IN, chr); |
| qemu_set_nonblock(s->listen_fd); |
| } |
| return chr; |
| } |
| |
| static CharDriverState *qemu_chr_open_socket(QemuOpts *opts) |
| { |
| CharDriverState *chr = NULL; |
| Error *local_err = NULL; |
| int fd = -1; |
| |
| bool is_listen = qemu_opt_get_bool(opts, "server", false); |
| bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true); |
| bool is_telnet = qemu_opt_get_bool(opts, "telnet", false); |
| bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true); |
| bool is_unix = qemu_opt_get(opts, "path") != NULL; |
| |
| if (is_unix) { |
| if (is_listen) { |
| fd = unix_listen_opts(opts, &local_err); |
| } else { |
| fd = unix_connect_opts(opts, &local_err, NULL, NULL); |
| } |
| } else { |
| if (is_listen) { |
| fd = inet_listen_opts(opts, 0, &local_err); |
| } else { |
| fd = inet_connect_opts(opts, &local_err, NULL, NULL); |
| } |
| } |
| if (fd < 0) { |
| goto fail; |
| } |
| |
| if (!is_waitconnect) |
| qemu_set_nonblock(fd); |
| |
| chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet, |
| is_waitconnect, &local_err); |
| if (local_err) { |
| goto fail; |
| } |
| return chr; |
| |
| |
| fail: |
| if (local_err) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| } |
| if (fd >= 0) { |
| closesocket(fd); |
| } |
| if (chr) { |
| g_free(chr->opaque); |
| g_free(chr); |
| } |
| return NULL; |
| } |
| |
| /*********************************************************/ |
| /* Ring buffer chardev */ |
| |
| typedef struct { |
| size_t size; |
| size_t prod; |
| size_t cons; |
| uint8_t *cbuf; |
| } RingBufCharDriver; |
| |
| static size_t ringbuf_count(const CharDriverState *chr) |
| { |
| const RingBufCharDriver *d = chr->opaque; |
| |
| return d->prod - d->cons; |
| } |
| |
| static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
| { |
| RingBufCharDriver *d = chr->opaque; |
| int i; |
| |
| if (!buf || (len < 0)) { |
| return -1; |
| } |
| |
| for (i = 0; i < len; i++ ) { |
| d->cbuf[d->prod++ & (d->size - 1)] = buf[i]; |
| if (d->prod - d->cons > d->size) { |
| d->cons = d->prod - d->size; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len) |
| { |
| RingBufCharDriver *d = chr->opaque; |
| int i; |
| |
| for (i = 0; i < len && d->cons != d->prod; i++) { |
| buf[i] = d->cbuf[d->cons++ & (d->size - 1)]; |
| } |
| |
| return i; |
| } |
| |
| static void ringbuf_chr_close(struct CharDriverState *chr) |
| { |
| RingBufCharDriver *d = chr->opaque; |
| |
| g_free(d->cbuf); |
| g_free(d); |
| chr->opaque = NULL; |
| } |
| |
| static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts, |
| Error **errp) |
| { |
| CharDriverState *chr; |
| RingBufCharDriver *d; |
| |
| chr = g_malloc0(sizeof(CharDriverState)); |
| d = g_malloc(sizeof(*d)); |
| |
| d->size = opts->has_size ? opts->size : 65536; |
| |
| /* The size must be power of 2 */ |
| if (d->size & (d->size - 1)) { |
| error_setg(errp, "size of ringbuf chardev must be power of two"); |
| goto fail; |
| } |
| |
| d->prod = 0; |
| d->cons = 0; |
| d->cbuf = g_malloc0(d->size); |
| |
| chr->opaque = d; |
| chr->chr_write = ringbuf_chr_write; |
| chr->chr_close = ringbuf_chr_close; |
| |
| return chr; |
| |
| fail: |
| g_free(d); |
| g_free(chr); |
| return NULL; |
| } |
| |
| static bool chr_is_ringbuf(const CharDriverState *chr) |
| { |
| return chr->chr_write == ringbuf_chr_write; |
| } |
| |
| void qmp_ringbuf_write(const char *device, const char *data, |
| bool has_format, enum DataFormat format, |
| Error **errp) |
| { |
| CharDriverState *chr; |
| const uint8_t *write_data; |
| int ret; |
| gsize write_count; |
| |
| chr = qemu_chr_find(device); |
| if (!chr) { |
| error_setg(errp, "Device '%s' not found", device); |
| return; |
| } |
| |
| if (!chr_is_ringbuf(chr)) { |
| error_setg(errp,"%s is not a ringbuf device", device); |
| return; |
| } |
| |
| if (has_format && (format == DATA_FORMAT_BASE64)) { |
| write_data = g_base64_decode(data, &write_count); |
| } else { |
| write_data = (uint8_t *)data; |
| write_count = strlen(data); |
| } |
| |
| ret = ringbuf_chr_write(chr, write_data, write_count); |
| |
| if (write_data != (uint8_t *)data) { |
| g_free((void *)write_data); |
| } |
| |
| if (ret < 0) { |
| error_setg(errp, "Failed to write to device %s", device); |
| return; |
| } |
| } |
| |
| char *qmp_ringbuf_read(const char *device, int64_t size, |
| bool has_format, enum DataFormat format, |
| Error **errp) |
| { |
| CharDriverState *chr; |
| uint8_t *read_data; |
| size_t count; |
| char *data; |
| |
| chr = qemu_chr_find(device); |
| if (!chr) { |
| error_setg(errp, "Device '%s' not found", device); |
| return NULL; |
| } |
| |
| if (!chr_is_ringbuf(chr)) { |
| error_setg(errp,"%s is not a ringbuf device", device); |
| return NULL; |
| } |
| |
| if (size <= 0) { |
| error_setg(errp, "size must be greater than zero"); |
| return NULL; |
| } |
| |
| count = ringbuf_count(chr); |
| size = size > count ? count : size; |
| read_data = g_malloc(size + 1); |
| |
| ringbuf_chr_read(chr, read_data, size); |
| |
| if (has_format && (format == DATA_FORMAT_BASE64)) { |
| data = g_base64_encode(read_data, size); |
| g_free(read_data); |
| } else { |
| /* |
| * FIXME should read only complete, valid UTF-8 characters up |
| * to @size bytes. Invalid sequences should be replaced by a |
| * suitable replacement character. Except when (and only |
| * when) ring buffer lost characters since last read, initial |
| * continuation characters should be dropped. |
| */ |
| read_data[size] = 0; |
| data = (char *)read_data; |
| } |
| |
| return data; |
| } |
| |
| QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename) |
| { |
| char host[65], port[33], width[8], height[8]; |
| int pos; |
| const char *p; |
| QemuOpts *opts; |
| Error *local_err = NULL; |
| |
| opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err); |
| if (local_err) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| return NULL; |
| } |
| |
| if (strstart(filename, "mon:", &p)) { |
| filename = p; |
| qemu_opt_set(opts, "mux", "on"); |
| if (strcmp(filename, "stdio") == 0) { |
| /* Monitor is muxed to stdio: do not exit on Ctrl+C by default |
| * but pass it to the guest. Handle this only for compat syntax, |
| * for -chardev syntax we have special option for this. |
| * This is what -nographic did, redirecting+muxing serial+monitor |
| * to stdio causing Ctrl+C to be passed to guest. */ |
| qemu_opt_set(opts, "signal", "off"); |
| } |
| } |
| |
| if (strcmp(filename, "null") == 0 || |
| strcmp(filename, "pty") == 0 || |
| strcmp(filename, "msmouse") == 0 || |
| strcmp(filename, "braille") == 0 || |
| strcmp(filename, "stdio") == 0) { |
| qemu_opt_set(opts, "backend", filename); |
| return opts; |
| } |
| if (strstart(filename, "vc", &p)) { |
| qemu_opt_set(opts, "backend", "vc"); |
|