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Diffstat (limited to 'src/qemu-char.c')
| -rw-r--r-- | src/qemu-char.c | 4385 |
1 files changed, 4385 insertions, 0 deletions
diff --git a/src/qemu-char.c b/src/qemu-char.c new file mode 100644 index 0000000..2969c44 --- /dev/null +++ b/src/qemu-char.c @@ -0,0 +1,4385 @@ +/* + * 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 "sysemu/sysemu.h" +#include "qemu/error-report.h" +#include "qemu/timer.h" +#include "sysemu/char.h" +#include "hw/usb.h" +#include "qmp-commands.h" +#include "qapi/qmp-input-visitor.h" +#include "qapi/qmp-output-visitor.h" +#include "qapi-visit.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 <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 +#define READ_RETRIES 10 +#define CHR_MAX_FILENAME_SIZE 256 +#define TCP_MAX_FDS 16 + +/***********************************************************/ +/* Socket address helpers */ + +static int SocketAddress_to_str(char *dest, int max_len, + const char *prefix, SocketAddress *addr, + bool is_listen, bool is_telnet) +{ + switch (addr->type) { + case SOCKET_ADDRESS_KIND_INET: + return snprintf(dest, max_len, "%s%s:%s:%s%s", prefix, + is_telnet ? "telnet" : "tcp", addr->u.inet->host, + addr->u.inet->port, is_listen ? ",server" : ""); + break; + case SOCKET_ADDRESS_KIND_UNIX: + return snprintf(dest, max_len, "%sunix:%s%s", prefix, + addr->u.q_unix->path, is_listen ? ",server" : ""); + break; + case SOCKET_ADDRESS_KIND_FD: + return snprintf(dest, max_len, "%sfd:%s%s", prefix, addr->u.fd->str, + is_listen ? ",server" : ""); + break; + default: + abort(); + } +} + +static int sockaddr_to_str(char *dest, int max_len, + struct sockaddr_storage *ss, socklen_t ss_len, + struct sockaddr_storage *ps, socklen_t ps_len, + bool is_listen, bool is_telnet) +{ + char shost[NI_MAXHOST], sserv[NI_MAXSERV]; + char phost[NI_MAXHOST], pserv[NI_MAXSERV]; + const char *left = "", *right = ""; + + switch (ss->ss_family) { +#ifndef _WIN32 + case AF_UNIX: + return snprintf(dest, max_len, "unix:%s%s", + ((struct sockaddr_un *)(ss))->sun_path, + is_listen ? ",server" : ""); +#endif + case AF_INET6: + left = "["; + right = "]"; + /* fall through */ + case AF_INET: + getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), + sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); + getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), + pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); + return snprintf(dest, max_len, "%s:%s%s%s:%s%s <-> %s%s%s:%s", + is_telnet ? "telnet" : "tcp", + left, shost, right, sserv, + is_listen ? ",server" : "", + left, phost, right, pserv); + + default: + return snprintf(dest, max_len, "unknown"); + } +} + +/***********************************************************/ +/* character device */ + +static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs = + QTAILQ_HEAD_INITIALIZER(chardevs); + +CharDriverState *qemu_chr_alloc(void) +{ + CharDriverState *chr = g_malloc0(sizeof(CharDriverState)); + qemu_mutex_init(&chr->chr_write_lock); + return chr; +} + +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) +{ + int ret; + + qemu_mutex_lock(&s->chr_write_lock); + ret = s->chr_write(s, buf, len); + qemu_mutex_unlock(&s->chr_write_lock); + return ret; +} + +int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len) +{ + int offset = 0; + int res = 0; + + qemu_mutex_lock(&s->chr_write_lock); + 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; + } + + offset += res; + } + qemu_mutex_unlock(&s->chr_write_lock); + + if (res < 0) { + return res; + } + return offset; +} + +int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len) +{ + int offset = 0, counter = 10; + int res; + + if (!s->chr_sync_read) { + return 0; + } + + while (offset < len) { + do { + res = s->chr_sync_read(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; + + if (!counter--) { + break; + } + } + + 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) +{ + int fd; + return (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1; +} + +int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len) +{ + return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1; +} + +int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num) +{ + return s->set_msgfds ? s->set_msgfds(s, fds, num) : -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(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + CharDriverState *chr; + + chr = qemu_chr_alloc(); + 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; + + /* Protected by the CharDriverState chr_write_lock. */ + int linestart; + int64_t timestamps_start; +} MuxDriver; + + +/* Called with chr_write_lock held. */ +static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + MuxDriver *d = chr->opaque; + int ret; + if (!d->timestamps) { + ret = qemu_chr_fe_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)); + qemu_chr_fe_write(d->drv, (uint8_t *)buf1, strlen(buf1)); + d->linestart = 0; + } + ret += qemu_chr_fe_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); + } + qemu_chr_fe_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] == '%') + qemu_chr_fe_write(chr, (uint8_t *)ebuf, strlen(ebuf)); + else + qemu_chr_fe_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"; + qemu_chr_fe_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 GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond) +{ + MuxDriver *d = s->opaque; + return d->drv->chr_add_watch(d->drv, cond); +} + +static CharDriverState *qemu_chr_open_mux(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, Error **errp) +{ + ChardevMux *mux = backend->u.mux; + CharDriverState *chr, *drv; + MuxDriver *d; + + drv = qemu_chr_find(mux->chardev); + if (drv == NULL) { + error_setg(errp, "mux: base chardev %s not found", mux->chardev); + return NULL; + } + + chr = qemu_chr_alloc(); + d = g_new0(MuxDriver, 1); + + 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; + if (drv->chr_add_watch) { + chr->chr_add_watch = mux_chr_add_watch; + } + /* 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_IO_NVAL); + 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; +} FDCharDriver; + +/* Called with chr_write_lock held. */ +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 = qemu_chr_alloc(); + s = g_new0(FDCharDriver, 1); + s->fd_in = io_channel_from_fd(fd_in); + s->fd_out = io_channel_from_fd(fd_out); + qemu_set_nonblock(fd_out); + 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(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevHostdev *opts = backend->u.pipe; + int fd_in, fd_out; + char filename_in[CHR_MAX_FILENAME_SIZE]; + char filename_out[CHR_MAX_FILENAME_SIZE]; + const char *filename = opts->device; + + snprintf(filename_in, CHR_MAX_FILENAME_SIZE, "%s.in", filename); + snprintf(filename_out, CHR_MAX_FILENAME_SIZE, "%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) { + error_setg_file_open(errp, errno, filename); + 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_in_use; +static bool stdio_allow_signal; +static bool stdio_echo_state; + +static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo); + +static void term_exit(void) +{ + tcsetattr (0, TCSANOW, &oldtty); + fcntl(0, F_SETFL, old_fd0_flags); +} + +static void term_stdio_handler(int sig) +{ + /* restore echo after resume from suspend. */ + qemu_chr_set_echo_stdio(NULL, stdio_echo_state); +} + +static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo) +{ + struct termios tty; + + stdio_echo_state = echo; + 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(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevStdio *opts = backend->u.stdio; + CharDriverState *chr; + struct sigaction act; + + if (is_daemonized()) { + error_setg(errp, "cannot use stdio with -daemonize"); + return NULL; + } + + if (stdio_in_use) { + error_setg(errp, "cannot use stdio by multiple character devices"); + return NULL; + } + + stdio_in_use = true; + old_fd0_flags = fcntl(0, F_GETFL); + tcgetattr(0, &oldtty); + qemu_set_nonblock(0); + atexit(term_exit); + + memset(&act, 0, sizeof(act)); + act.sa_handler = term_stdio_handler; + sigaction(SIGCONT, &act, NULL); + + 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_SERIAL 1 +#define HAVE_CHARDEV_PTY 1 + +typedef struct { + GIOChannel *fd; + int read_bytes; + + /* Protected by the CharDriverState chr_write_lock. */ + int connected; + guint timer_tag; + guint open_tag; +} PtyCharDriver; + +static void pty_chr_update_read_handler_locked(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; + + qemu_mutex_lock(&chr->chr_write_lock); + s->timer_tag = 0; + s->open_tag = 0; + if (!s->connected) { + /* Next poll ... */ + pty_chr_update_read_handler_locked(chr); + } + qemu_mutex_unlock(&chr->chr_write_lock); + return FALSE; +} + +/* Called with chr_write_lock held. */ +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); + } +} + +/* Called with chr_write_lock held. */ +static void pty_chr_update_read_handler_locked(CharDriverState *chr) +{ + PtyCharDriver *s = chr->opaque; + GPollFD pfd; + int rc; + + pfd.fd = g_io_channel_unix_get_fd(s->fd); + pfd.events = G_IO_OUT; + pfd.revents = 0; + do { + rc = g_poll(&pfd, 1, 0); + } while (rc == -1 && errno == EINTR); + assert(rc >= 0); + + if (pfd.revents & G_IO_HUP) { + pty_chr_state(chr, 0); + } else { + pty_chr_state(chr, 1); + } +} + +static void pty_chr_update_read_handler(CharDriverState *chr) +{ + qemu_mutex_lock(&chr->chr_write_lock); + pty_chr_update_read_handler_locked(chr); + qemu_mutex_unlock(&chr->chr_write_lock); +} + +/* Called with chr_write_lock held. */ +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_locked(chr); + if (!s->connected) { + return 0; + } + } + return io_channel_send(s->fd, buf, len); +} + +static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond) +{ + PtyCharDriver *s = chr->opaque; + if (!s->connected) { + return NULL; + } + 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 gboolean qemu_chr_be_generic_open_func(gpointer opaque) +{ + CharDriverState *chr = opaque; + PtyCharDriver *s = chr->opaque; + + s->open_tag = 0; + qemu_chr_be_generic_open(chr); + return FALSE; +} + +/* Called with chr_write_lock held. */ +static void pty_chr_state(CharDriverState *chr, int connected) +{ + PtyCharDriver *s = chr->opaque; + + if (!connected) { + if (s->open_tag) { + g_source_remove(s->open_tag); + s->open_tag = 0; + } + 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) { + g_assert(s->open_tag == 0); + s->connected = 1; + s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, 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; + + qemu_mutex_lock(&chr->chr_write_lock); + pty_chr_state(chr, 0); + 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; + } + qemu_mutex_unlock(&chr->chr_write_lock); + g_free(s); + qemu_chr_be_event(chr, CHR_EVENT_CLOSED); +} + +static CharDriverState *qemu_chr_open_pty(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + 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) { + error_setg_errno(errp, errno, "Failed to create PTY"); + return NULL; + } + + close(slave_fd); + qemu_set_nonblock(master_fd); + + chr = qemu_chr_alloc(); + + 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_new0(PtyCharDriver, 1); + 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, Error **errp) +{ + CharDriverState *chr; + ParallelCharDriver *drv; + + if (ioctl(fd, PPCLAIM) < 0) { + error_setg_errno(errp, errno, "not a parallel port"); + close(fd); + return NULL; + } + + drv = g_new0(ParallelCharDriver, 1); + drv->fd = fd; + drv->mode = IEEE1284_MODE_COMPAT; + + chr = qemu_chr_alloc(); + 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, Error **errp) +{ + CharDriverState *chr; + + chr = qemu_chr_alloc(); + 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 */ + +#define HAVE_CHARDEV_SERIAL 1 + +typedef struct { + int max_size; + HANDLE hcom, hrecv, hsend; + OVERLAPPED orecv; + BOOL fpipe; + DWORD len; + + /* Protected by the CharDriverState chr_write_lock. */ + OVERLAPPED osend; +} 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, Error **errp) +{ + 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) { + error_setg(errp, "Failed CreateEvent"); + goto fail; + } + s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hrecv) { + error_setg(errp, "Failed CreateEvent"); + goto fail; + } + + s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, + OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); + if (s->hcom == INVALID_HANDLE_VALUE) { + error_setg(errp, "Failed CreateFile (%lu)", GetLastError()); + s->hcom = NULL; + goto fail; + } + + if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) { + error_setg(errp, "Failed SetupComm"); + 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)) { + error_setg(errp, "Failed SetCommState"); + goto fail; + } + + if (!SetCommMask(s->hcom, EV_ERR)) { + error_setg(errp, "Failed SetCommMask"); + goto fail; + } + + cto.ReadIntervalTimeout = MAXDWORD; + if (!SetCommTimeouts(s->hcom, &cto)) { + error_setg(errp, "Failed SetCommTimeouts"); + goto fail; + } + + if (!ClearCommError(s->hcom, &err, &comstat)) { + error_setg(errp, "Failed ClearCommError"); + goto fail; + } + qemu_add_polling_cb(win_chr_poll, chr); + return 0; + + fail: + win_chr_close(chr); + return -1; +} + +/* Called with chr_write_lock held. */ +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, + Error **errp) +{ + CharDriverState *chr; + WinCharState *s; + + chr = qemu_chr_alloc(); + s = g_new0(WinCharState, 1); + chr->opaque = s; + chr->chr_write = win_chr_write; + chr->chr_close = win_chr_close; + + if (win_chr_init(chr, filename, errp) < 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, + Error **errp) +{ + WinCharState *s = chr->opaque; + OVERLAPPED ov; + int ret; + DWORD size; + char openname[CHR_MAX_FILENAME_SIZE]; + + 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; + } + + 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) { + 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: + win_chr_close(chr); + return -1; +} + + +static CharDriverState *qemu_chr_open_pipe(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevHostdev *opts = backend->u.pipe; + const char *filename = opts->device; + CharDriverState *chr; + WinCharState *s; + + chr = qemu_chr_alloc(); + s = g_new0(WinCharState, 1); + chr->opaque = s; + chr->chr_write = win_chr_write; + chr->chr_close = win_chr_close; + + if (win_chr_pipe_init(chr, filename, errp) < 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 = qemu_chr_alloc(); + s = g_new0(WinCharState, 1); + s->hcom = fd_out; + chr->opaque = s; + chr->chr_write = win_chr_write; + return chr; +} + +static CharDriverState *qemu_chr_open_win_con(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + 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(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + CharDriverState *chr; + WinStdioCharState *stdio; + DWORD dwMode; + int is_console = 0; + + chr = qemu_chr_alloc(); + stdio = g_new0(WinStdioCharState, 1); + + stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE); + if (stdio->hStdIn == INVALID_HANDLE_VALUE) { + error_setg(errp, "cannot open stdio: invalid handle"); + return NULL; + } + + 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)) { + error_setg(errp, "qemu_add_wait_object: failed"); + goto err1; + } + } else { + DWORD dwId; + + stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE + || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) { + error_setg(errp, "cannot create event"); + goto err2; + } + if (qemu_add_wait_object(stdio->hInputReadyEvent, + win_stdio_thread_wait_func, chr)) { + error_setg(errp, "qemu_add_wait_object: failed"); + goto err2; + } + stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread, + chr, 0, &dwId); + + if (stdio->hInputThread == INVALID_HANDLE_VALUE) { + error_setg(errp, "cannot create stdio thread"); + goto err3; + } + } + + 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; + +err3: + qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL); +err2: + CloseHandle(stdio->hInputReadyEvent); + CloseHandle(stdio->hInputDoneEvent); +err1: + qemu_del_wait_object(stdio->hStdIn, NULL, NULL); + return NULL; +} +#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; + +/* Called with chr_write_lock held. */ +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 = qemu_chr_alloc(); + s = g_new0(NetCharDriver, 1); + + 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; +} + +/***********************************************************/ +/* 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 *read_msgfds; + int read_msgfds_num; + int *write_msgfds; + int write_msgfds_num; + + SocketAddress *addr; + bool is_listen; + bool is_telnet; + + guint reconnect_timer; + int64_t reconnect_time; + bool connect_err_reported; +} TCPCharDriver; + +static gboolean socket_reconnect_timeout(gpointer opaque); + +static void qemu_chr_socket_restart_timer(CharDriverState *chr) +{ + TCPCharDriver *s = chr->opaque; + assert(s->connected == 0); + s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time, + socket_reconnect_timeout, chr); +} + +static void check_report_connect_error(CharDriverState *chr, + Error *err) +{ + TCPCharDriver *s = chr->opaque; + + if (!s->connect_err_reported) { + error_report("Unable to connect character device %s: %s", + chr->label, error_get_pretty(err)); + s->connect_err_reported = true; + } + qemu_chr_socket_restart_timer(chr); +} + +static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque); + +#ifndef _WIN32 +static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len) +{ + TCPCharDriver *s = chr->opaque; + struct msghdr msgh; + struct iovec iov; + int r; + + size_t fd_size = s->write_msgfds_num * sizeof(int); + char control[CMSG_SPACE(fd_size)]; + struct cmsghdr *cmsg; + + memset(&msgh, 0, sizeof(msgh)); + memset(control, 0, sizeof(control)); + + /* set the payload */ + iov.iov_base = (uint8_t *) buf; + iov.iov_len = len; + + msgh.msg_iov = &iov; + msgh.msg_iovlen = 1; + + msgh.msg_control = control; + msgh.msg_controllen = sizeof(control); + + cmsg = CMSG_FIRSTHDR(&msgh); + + cmsg->cmsg_len = CMSG_LEN(fd_size); + cmsg->cmsg_level = SOL_SOCKET; + cmsg->cmsg_type = SCM_RIGHTS; + memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size); + + do { + r = sendmsg(s->fd, &msgh, 0); + } while (r < 0 && errno == EINTR); + + /* free the written msgfds, no matter what */ + if (s->write_msgfds_num) { + g_free(s->write_msgfds); + s->write_msgfds = 0; + s->write_msgfds_num = 0; + } + + return r; +} +#endif + +/* Called with chr_write_lock held. */ +static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + TCPCharDriver *s = chr->opaque; + if (s->connected) { +#ifndef _WIN32 + if (s->is_unix && s->write_msgfds_num) { + return unix_send_msgfds(chr, buf, len); + } else +#endif + { + 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_msgfds(CharDriverState *chr, int *fds, int num) +{ + TCPCharDriver *s = chr->opaque; + int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; + + assert(num <= TCP_MAX_FDS); + + if (to_copy) { + int i; + + memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); + + /* Close unused fds */ + for (i = to_copy; i < s->read_msgfds_num; i++) { + close(s->read_msgfds[i]); + } + + g_free(s->read_msgfds); + s->read_msgfds = 0; + s->read_msgfds_num = 0; + } + + return to_copy; +} + +static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num) +{ + TCPCharDriver *s = chr->opaque; + + /* clear old pending fd array */ + g_free(s->write_msgfds); + + if (num) { + s->write_msgfds = g_new(int, num); + memcpy(s->write_msgfds, fds, num * sizeof(int)); + } + + s->write_msgfds_num = num; + + return 0; +} + +#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_size, i; + + if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) || + cmsg->cmsg_level != SOL_SOCKET || + cmsg->cmsg_type != SCM_RIGHTS) { + continue; + } + + fd_size = cmsg->cmsg_len - CMSG_LEN(0); + + if (!fd_size) { + continue; + } + + /* close and clean read_msgfds */ + for (i = 0; i < s->read_msgfds_num; i++) { + close(s->read_msgfds[i]); + } + + if (s->read_msgfds_num) { + g_free(s->read_msgfds); + } + + s->read_msgfds_num = fd_size / sizeof(int); + s->read_msgfds = g_malloc(fd_size); + memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size); + + for (i = 0; i < s->read_msgfds_num; i++) { + int fd = s->read_msgfds[i]; + 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 + } + } +} + +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) * TCP_MAX_FDS)]; + } 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 + do { + ret = recvmsg(s->fd, &msg, flags); + } while (ret == -1 && errno == EINTR); + + 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; + ssize_t ret; + + do { + ret = qemu_recv(s->fd, buf, len, 0); + } while (ret == -1 && socket_error() == EINTR); + + return ret; +} +#endif + +static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond) +{ + TCPCharDriver *s = chr->opaque; + return g_io_create_watch(s->chan, cond); +} + +static void tcp_chr_disconnect(CharDriverState *chr) +{ + TCPCharDriver *s = chr->opaque; + + 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; + SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE, + "disconnected:", s->addr, s->is_listen, s->is_telnet); + qemu_chr_be_event(chr, CHR_EVENT_CLOSED); + if (s->reconnect_time) { + qemu_chr_socket_restart_timer(chr); + } +} + +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 || + (size < 0 && + socket_error() != EAGAIN && socket_error() != EWOULDBLOCK)) { + /* connection closed */ + tcp_chr_disconnect(chr); + } 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; +} + +static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len) +{ + TCPCharDriver *s = chr->opaque; + int size; + + if (!s->connected) { + return 0; + } + + size = tcp_chr_recv(chr, (void *) buf, len); + if (size == 0) { + /* connection closed */ + tcp_chr_disconnect(chr); + } + + return size; +} + +#ifndef _WIN32 +CharDriverState *qemu_chr_open_eventfd(int eventfd) +{ + CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd); + + if (chr) { + chr->avail_connections = 1; + } + + return chr; +} +#endif + +static void tcp_chr_connect(void *opaque) +{ + CharDriverState *chr = opaque; + TCPCharDriver *s = chr->opaque; + struct sockaddr_storage ss, ps; + socklen_t ss_len = sizeof(ss), ps_len = sizeof(ps); + + memset(&ss, 0, ss_len); + if (getsockname(s->fd, (struct sockaddr *) &ss, &ss_len) != 0) { + snprintf(chr->filename, CHR_MAX_FILENAME_SIZE, + "Error in getsockname: %s\n", strerror(errno)); + } else if (getpeername(s->fd, (struct sockaddr *) &ps, &ps_len) != 0) { + snprintf(chr->filename, CHR_MAX_FILENAME_SIZE, + "Error in getpeername: %s\n", strerror(errno)); + } else { + sockaddr_to_str(chr->filename, CHR_MAX_FILENAME_SIZE, + &ss, ss_len, &ps, ps_len, + s->is_listen, s->is_telnet); + } + + 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; + int i; + + if (s->reconnect_timer) { + g_source_remove(s->reconnect_timer); + s->reconnect_timer = 0; + } + qapi_free_SocketAddress(s->addr); + 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); + } + if (s->read_msgfds_num) { + for (i = 0; i < s->read_msgfds_num; i++) { + close(s->read_msgfds[i]); + } + g_free(s->read_msgfds); + } + if (s->write_msgfds_num) { + g_free(s->write_msgfds); + } + g_free(s); + qemu_chr_be_event(chr, CHR_EVENT_CLOSED); +} + +static void qemu_chr_finish_socket_connection(CharDriverState *chr, int fd) +{ + TCPCharDriver *s = chr->opaque; + + if (s->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); + } else { + s->connected = 1; + s->fd = fd; + socket_set_nodelay(fd); + s->chan = io_channel_from_socket(s->fd); + tcp_chr_connect(chr); + } +} + +static void qemu_chr_socket_connected(int fd, Error *err, void *opaque) +{ + CharDriverState *chr = opaque; + TCPCharDriver *s = chr->opaque; + + if (fd < 0) { + check_report_connect_error(chr, err); + return; + } + + s->connect_err_reported = false; + qemu_chr_finish_socket_connection(chr, fd); +} + +static bool qemu_chr_open_socket_fd(CharDriverState *chr, Error **errp) +{ + TCPCharDriver *s = chr->opaque; + int fd; + + if (s->is_listen) { + fd = socket_listen(s->addr, errp); + } else if (s->reconnect_time) { + fd = socket_connect(s->addr, errp, qemu_chr_socket_connected, chr); + return fd >= 0; + } else { + fd = socket_connect(s->addr, errp, NULL, NULL); + } + if (fd < 0) { + return false; + } + + qemu_chr_finish_socket_connection(chr, fd); + return true; +} + +/*********************************************************/ +/* 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; +} + +/* Called with chr_write_lock held. */ +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; + + qemu_mutex_lock(&chr->chr_write_lock); + for (i = 0; i < len && d->cons != d->prod; i++) { + buf[i] = d->cbuf[d->cons++ & (d->size - 1)]; + } + qemu_mutex_unlock(&chr->chr_write_lock); + + 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(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevRingbuf *opts = backend->u.ringbuf; + CharDriverState *chr; + RingBufCharDriver *d; + + chr = qemu_chr_alloc(); + 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; +} + +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) { + error_report_err(local_err); + return NULL; + } + + if (strstart(filename, "mon:", &p)) { + filename = p; + qemu_opt_set(opts, "mux", "on", &error_abort); + 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", &error_abort); + } + } + + if (strcmp(filename, "null") == 0 || + strcmp(filename, "pty") == 0 || + strcmp(filename, "msmouse") == 0 || + strcmp(filename, "braille") == 0 || + strcmp(filename, "testdev") == 0 || + strcmp(filename, "stdio") == 0) { + qemu_opt_set(opts, "backend", filename, &error_abort); + return opts; + } + if (strstart(filename, "vc", &p)) { + qemu_opt_set(opts, "backend", "vc", &error_abort); + if (*p == ':') { + if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) { + /* pixels */ + qemu_opt_set(opts, "width", width, &error_abort); + qemu_opt_set(opts, "height", height, &error_abort); + } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) { + /* chars */ + qemu_opt_set(opts, "cols", width, &error_abort); + qemu_opt_set(opts, "rows", height, &error_abort); + } else { + goto fail; + } + } + return opts; + } + if (strcmp(filename, "con:") == 0) { + qemu_opt_set(opts, "backend", "console", &error_abort); + return opts; + } + if (strstart(filename, "COM", NULL)) { + qemu_opt_set(opts, "backend", "serial", &error_abort); + qemu_opt_set(opts, "path", filename, &error_abort); + return opts; + } + if (strstart(filename, "file:", &p)) { + qemu_opt_set(opts, "backend", "file", &error_abort); + qemu_opt_set(opts, "path", p, &error_abort); + return opts; + } + if (strstart(filename, "pipe:", &p)) { + qemu_opt_set(opts, "backend", "pipe", &error_abort); + qemu_opt_set(opts, "path", p, &error_abort); + return opts; + } + if (strstart(filename, "tcp:", &p) || + strstart(filename, "telnet:", &p)) { + if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) { + host[0] = 0; + if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) + goto fail; + } + qemu_opt_set(opts, "backend", "socket", &error_abort); + qemu_opt_set(opts, "host", host, &error_abort); + qemu_opt_set(opts, "port", port, &error_abort); + if (p[pos] == ',') { + qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err); + if (local_err) { + error_report_err(local_err); + goto fail; + } + } + if (strstart(filename, "telnet:", &p)) + qemu_opt_set(opts, "telnet", "on", &error_abort); + return opts; + } + if (strstart(filename, "udp:", &p)) { + qemu_opt_set(opts, "backend", "udp", &error_abort); + if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) { + host[0] = 0; + if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) { + goto fail; + } + } + qemu_opt_set(opts, "host", host, &error_abort); + qemu_opt_set(opts, "port", port, &error_abort); + if (p[pos] == '@') { + p += pos + 1; + if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) { + host[0] = 0; + if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) { + goto fail; + } + } + qemu_opt_set(opts, "localaddr", host, &error_abort); + qemu_opt_set(opts, "localport", port, &error_abort); + } + return opts; + } + if (strstart(filename, "unix:", &p)) { + qemu_opt_set(opts, "backend", "socket", &error_abort); + qemu_opts_do_parse(opts, p, "path", &local_err); + if (local_err) { + error_report_err(local_err); + goto fail; + } + return opts; + } + if (strstart(filename, "/dev/parport", NULL) || + strstart(filename, "/dev/ppi", NULL)) { + qemu_opt_set(opts, "backend", "parport", &error_abort); + qemu_opt_set(opts, "path", filename, &error_abort); + return opts; + } + if (strstart(filename, "/dev/", NULL)) { + qemu_opt_set(opts, "backend", "tty", &error_abort); + qemu_opt_set(opts, "path", filename, &error_abort); + return opts; + } + +fail: + qemu_opts_del(opts); + return NULL; +} + +static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *path = qemu_opt_get(opts, "path"); + + if (path == NULL) { + error_setg(errp, "chardev: file: no filename given"); + return; + } + backend->u.file = g_new0(ChardevFile, 1); + backend->u.file->out = g_strdup(path); +} + +static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + backend->u.stdio = g_new0(ChardevStdio, 1); + backend->u.stdio->has_signal = true; + backend->u.stdio->signal = qemu_opt_get_bool(opts, "signal", true); +} + +#ifdef HAVE_CHARDEV_SERIAL +static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *device = qemu_opt_get(opts, "path"); + + if (device == NULL) { + error_setg(errp, "chardev: serial/tty: no device path given"); + return; + } + backend->u.serial = g_new0(ChardevHostdev, 1); + backend->u.serial->device = g_strdup(device); +} +#endif + +#ifdef HAVE_CHARDEV_PARPORT +static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *device = qemu_opt_get(opts, "path"); + + if (device == NULL) { + error_setg(errp, "chardev: parallel: no device path given"); + return; + } + backend->u.parallel = g_new0(ChardevHostdev, 1); + backend->u.parallel->device = g_strdup(device); +} +#endif + +static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *device = qemu_opt_get(opts, "path"); + + if (device == NULL) { + error_setg(errp, "chardev: pipe: no device path given"); + return; + } + backend->u.pipe = g_new0(ChardevHostdev, 1); + backend->u.pipe->device = g_strdup(device); +} + +static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + int val; + + backend->u.ringbuf = g_new0(ChardevRingbuf, 1); + + val = qemu_opt_get_size(opts, "size", 0); + if (val != 0) { + backend->u.ringbuf->has_size = true; + backend->u.ringbuf->size = val; + } +} + +static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *chardev = qemu_opt_get(opts, "chardev"); + + if (chardev == NULL) { + error_setg(errp, "chardev: mux: no chardev given"); + return; + } + backend->u.mux = g_new0(ChardevMux, 1); + backend->u.mux->chardev = g_strdup(chardev); +} + +static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + 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); + int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0); + const char *path = qemu_opt_get(opts, "path"); + const char *host = qemu_opt_get(opts, "host"); + const char *port = qemu_opt_get(opts, "port"); + SocketAddress *addr; + + if (!path) { + if (!host) { + error_setg(errp, "chardev: socket: no host given"); + return; + } + if (!port) { + error_setg(errp, "chardev: socket: no port given"); + return; + } + } + + backend->u.socket = g_new0(ChardevSocket, 1); + + backend->u.socket->has_nodelay = true; + backend->u.socket->nodelay = do_nodelay; + backend->u.socket->has_server = true; + backend->u.socket->server = is_listen; + backend->u.socket->has_telnet = true; + backend->u.socket->telnet = is_telnet; + backend->u.socket->has_wait = true; + backend->u.socket->wait = is_waitconnect; + backend->u.socket->has_reconnect = true; + backend->u.socket->reconnect = reconnect; + + addr = g_new0(SocketAddress, 1); + if (path) { + addr->type = SOCKET_ADDRESS_KIND_UNIX; + addr->u.q_unix = g_new0(UnixSocketAddress, 1); + addr->u.q_unix->path = g_strdup(path); + } else { + addr->type = SOCKET_ADDRESS_KIND_INET; + addr->u.inet = g_new0(InetSocketAddress, 1); + addr->u.inet->host = g_strdup(host); + addr->u.inet->port = g_strdup(port); + addr->u.inet->has_to = qemu_opt_get(opts, "to"); + addr->u.inet->to = qemu_opt_get_number(opts, "to", 0); + addr->u.inet->has_ipv4 = qemu_opt_get(opts, "ipv4"); + addr->u.inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0); + addr->u.inet->has_ipv6 = qemu_opt_get(opts, "ipv6"); + addr->u.inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0); + } + backend->u.socket->addr = addr; +} + +static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *host = qemu_opt_get(opts, "host"); + const char *port = qemu_opt_get(opts, "port"); + const char *localaddr = qemu_opt_get(opts, "localaddr"); + const char *localport = qemu_opt_get(opts, "localport"); + bool has_local = false; + SocketAddress *addr; + + if (host == NULL || strlen(host) == 0) { + host = "localhost"; + } + if (port == NULL || strlen(port) == 0) { + error_setg(errp, "chardev: udp: remote port not specified"); + return; + } + if (localport == NULL || strlen(localport) == 0) { + localport = "0"; + } else { + has_local = true; + } + if (localaddr == NULL || strlen(localaddr) == 0) { + localaddr = ""; + } else { + has_local = true; + } + + backend->u.udp = g_new0(ChardevUdp, 1); + + addr = g_new0(SocketAddress, 1); + addr->type = SOCKET_ADDRESS_KIND_INET; + addr->u.inet = g_new0(InetSocketAddress, 1); + addr->u.inet->host = g_strdup(host); + addr->u.inet->port = g_strdup(port); + addr->u.inet->has_ipv4 = qemu_opt_get(opts, "ipv4"); + addr->u.inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0); + addr->u.inet->has_ipv6 = qemu_opt_get(opts, "ipv6"); + addr->u.inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0); + backend->u.udp->remote = addr; + + if (has_local) { + backend->u.udp->has_local = true; + addr = g_new0(SocketAddress, 1); + addr->type = SOCKET_ADDRESS_KIND_INET; + addr->u.inet = g_new0(InetSocketAddress, 1); + addr->u.inet->host = g_strdup(localaddr); + addr->u.inet->port = g_strdup(localport); + backend->u.udp->local = addr; + } +} + +typedef struct CharDriver { + const char *name; + ChardevBackendKind kind; + void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp); + CharDriverState *(*create)(const char *id, ChardevBackend *backend, + ChardevReturn *ret, Error **errp); +} CharDriver; + +static GSList *backends; + +void register_char_driver(const char *name, ChardevBackendKind kind, + void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp), + CharDriverState *(*create)(const char *id, ChardevBackend *backend, + ChardevReturn *ret, Error **errp)) +{ + CharDriver *s; + + s = g_malloc0(sizeof(*s)); + s->name = g_strdup(name); + s->kind = kind; + s->parse = parse; + s->create = create; + + backends = g_slist_append(backends, s); +} + +CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts, + void (*init)(struct CharDriverState *s), + Error **errp) +{ + Error *local_err = NULL; + CharDriver *cd; + CharDriverState *chr; + GSList *i; + ChardevReturn *ret = NULL; + ChardevBackend *backend; + const char *id = qemu_opts_id(opts); + char *bid = NULL; + + if (id == NULL) { + error_setg(errp, "chardev: no id specified"); + goto err; + } + + if (qemu_opt_get(opts, "backend") == NULL) { + error_setg(errp, "chardev: \"%s\" missing backend", + qemu_opts_id(opts)); + goto err; + } + for (i = backends; i; i = i->next) { + cd = i->data; + + if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) { + break; + } + } + if (i == NULL) { + error_setg(errp, "chardev: backend \"%s\" not found", + qemu_opt_get(opts, "backend")); + goto err; + } + + backend = g_new0(ChardevBackend, 1); + + if (qemu_opt_get_bool(opts, "mux", 0)) { + bid = g_strdup_printf("%s-base", id); + } + + chr = NULL; + backend->type = cd->kind; + if (cd->parse) { + cd->parse(opts, backend, &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto qapi_out; + } + } + ret = qmp_chardev_add(bid ? bid : id, backend, errp); + if (!ret) { + goto qapi_out; + } + + if (bid) { + qapi_free_ChardevBackend(backend); + qapi_free_ChardevReturn(ret); + backend = g_new0(ChardevBackend, 1); + backend->u.mux = g_new0(ChardevMux, 1); + backend->type = CHARDEV_BACKEND_KIND_MUX; + backend->u.mux->chardev = g_strdup(bid); + ret = qmp_chardev_add(id, backend, errp); + if (!ret) { + chr = qemu_chr_find(bid); + qemu_chr_delete(chr); + chr = NULL; + goto qapi_out; + } + } + + chr = qemu_chr_find(id); + chr->opts = opts; + +qapi_out: + qapi_free_ChardevBackend(backend); + qapi_free_ChardevReturn(ret); + g_free(bid); + return chr; + +err: + qemu_opts_del(opts); + return NULL; +} + +CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s)) +{ + const char *p; + CharDriverState *chr; + QemuOpts *opts; + Error *err = NULL; + + if (strstart(filename, "chardev:", &p)) { + return qemu_chr_find(p); + } + + opts = qemu_chr_parse_compat(label, filename); + if (!opts) + return NULL; + + chr = qemu_chr_new_from_opts(opts, init, &err); + if (err) { + error_report_err(err); + } + if (chr && qemu_opt_get_bool(opts, "mux", 0)) { + qemu_chr_fe_claim_no_fail(chr); + monitor_init(chr, MONITOR_USE_READLINE); + } + return chr; +} + +void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo) +{ + if (chr->chr_set_echo) { + chr->chr_set_echo(chr, echo); + } +} + +void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open) +{ + if (chr->fe_open == fe_open) { + return; + } + chr->fe_open = fe_open; + if (chr->chr_set_fe_open) { + chr->chr_set_fe_open(chr, fe_open); + } +} + +void qemu_chr_fe_event(struct CharDriverState *chr, int event) +{ + if (chr->chr_fe_event) { + chr->chr_fe_event(chr, event); + } +} + +int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond, + GIOFunc func, void *user_data) +{ + GSource *src; + guint tag; + + if (s->chr_add_watch == NULL) { + return -ENOSYS; + } + + src = s->chr_add_watch(s, cond); + if (!src) { + return -EINVAL; + } + + g_source_set_callback(src, (GSourceFunc)func, user_data, NULL); + tag = g_source_attach(src, NULL); + g_source_unref(src); + + return tag; +} + +int qemu_chr_fe_claim(CharDriverState *s) +{ + if (s->avail_connections < 1) { + return -1; + } + s->avail_connections--; + return 0; +} + +void qemu_chr_fe_claim_no_fail(CharDriverState *s) +{ + if (qemu_chr_fe_claim(s) != 0) { + fprintf(stderr, "%s: error chardev \"%s\" already used\n", + __func__, s->label); + exit(1); + } +} + +void qemu_chr_fe_release(CharDriverState *s) +{ + s->avail_connections++; +} + +void qemu_chr_free(CharDriverState *chr) +{ + if (chr->chr_close) { + chr->chr_close(chr); + } + g_free(chr->filename); + g_free(chr->label); + qemu_opts_del(chr->opts); + g_free(chr); +} + +void qemu_chr_delete(CharDriverState *chr) +{ + QTAILQ_REMOVE(&chardevs, chr, next); + qemu_chr_free(chr); +} + +ChardevInfoList *qmp_query_chardev(Error **errp) +{ + ChardevInfoList *chr_list = NULL; + CharDriverState *chr; + + QTAILQ_FOREACH(chr, &chardevs, next) { + ChardevInfoList *info = g_malloc0(sizeof(*info)); + info->value = g_malloc0(sizeof(*info->value)); + info->value->label = g_strdup(chr->label); + info->value->filename = g_strdup(chr->filename); + info->value->frontend_open = chr->fe_open; + + info->next = chr_list; + chr_list = info; + } + + return chr_list; +} + +ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp) +{ + ChardevBackendInfoList *backend_list = NULL; + CharDriver *c = NULL; + GSList *i = NULL; + + for (i = backends; i; i = i->next) { + ChardevBackendInfoList *info = g_malloc0(sizeof(*info)); + c = i->data; + info->value = g_malloc0(sizeof(*info->value)); + info->value->name = g_strdup(c->name); + + info->next = backend_list; + backend_list = info; + } + + return backend_list; +} + +CharDriverState *qemu_chr_find(const char *name) +{ + CharDriverState *chr; + + QTAILQ_FOREACH(chr, &chardevs, next) { + if (strcmp(chr->label, name) != 0) + continue; + return chr; + } + return NULL; +} + +/* Get a character (serial) device interface. */ +CharDriverState *qemu_char_get_next_serial(void) +{ + static int next_serial; + CharDriverState *chr; + + /* FIXME: This function needs to go away: use chardev properties! */ + + while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) { + chr = serial_hds[next_serial++]; + qemu_chr_fe_claim_no_fail(chr); + return chr; + } + return NULL; +} + +QemuOptsList qemu_chardev_opts = { + .name = "chardev", + .implied_opt_name = "backend", + .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head), + .desc = { + { + .name = "backend", + .type = QEMU_OPT_STRING, + },{ + .name = "path", + .type = QEMU_OPT_STRING, + },{ + .name = "host", + .type = QEMU_OPT_STRING, + },{ + .name = "port", + .type = QEMU_OPT_STRING, + },{ + .name = "localaddr", + .type = QEMU_OPT_STRING, + },{ + .name = "localport", + .type = QEMU_OPT_STRING, + },{ + .name = "to", + .type = QEMU_OPT_NUMBER, + },{ + .name = "ipv4", + .type = QEMU_OPT_BOOL, + },{ + .name = "ipv6", + .type = QEMU_OPT_BOOL, + },{ + .name = "wait", + .type = QEMU_OPT_BOOL, + },{ + .name = "server", + .type = QEMU_OPT_BOOL, + },{ + .name = "delay", + .type = QEMU_OPT_BOOL, + },{ + .name = "reconnect", + .type = QEMU_OPT_NUMBER, + },{ + .name = "telnet", + .type = QEMU_OPT_BOOL, + },{ + .name = "width", + .type = QEMU_OPT_NUMBER, + },{ + .name = "height", + .type = QEMU_OPT_NUMBER, + },{ + .name = "cols", + .type = QEMU_OPT_NUMBER, + },{ + .name = "rows", + .type = QEMU_OPT_NUMBER, + },{ + .name = "mux", + .type = QEMU_OPT_BOOL, + },{ + .name = "signal", + .type = QEMU_OPT_BOOL, + },{ + .name = "name", + .type = QEMU_OPT_STRING, + },{ + .name = "debug", + .type = QEMU_OPT_NUMBER, + },{ + .name = "size", + .type = QEMU_OPT_SIZE, + },{ + .name = "chardev", + .type = QEMU_OPT_STRING, + }, + { /* end of list */ } + }, +}; + +#ifdef _WIN32 + +static CharDriverState *qmp_chardev_open_file(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevFile *file = backend->u.file; + HANDLE out; + + if (file->has_in) { + error_setg(errp, "input file not supported"); + return NULL; + } + + out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL, + OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); + if (out == INVALID_HANDLE_VALUE) { + error_setg(errp, "open %s failed", file->out); + return NULL; + } + return qemu_chr_open_win_file(out); +} + +static CharDriverState *qmp_chardev_open_serial(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevHostdev *serial = backend->u.serial; + return qemu_chr_open_win_path(serial->device, errp); +} + +#else /* WIN32 */ + +static int qmp_chardev_open_file_source(char *src, int flags, + Error **errp) +{ + int fd = -1; + + TFR(fd = qemu_open(src, flags, 0666)); + if (fd == -1) { + error_setg_file_open(errp, errno, src); + } + return fd; +} + +static CharDriverState *qmp_chardev_open_file(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevFile *file = backend->u.file; + int flags, in = -1, out; + + flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY; + out = qmp_chardev_open_file_source(file->out, flags, errp); + if (out < 0) { + return NULL; + } + + if (file->has_in) { + flags = O_RDONLY; + in = qmp_chardev_open_file_source(file->in, flags, errp); + if (in < 0) { + qemu_close(out); + return NULL; + } + } + + return qemu_chr_open_fd(in, out); +} + +#ifdef HAVE_CHARDEV_SERIAL +static CharDriverState *qmp_chardev_open_serial(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevHostdev *serial = backend->u.serial; + int fd; + + fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp); + if (fd < 0) { + return NULL; + } + qemu_set_nonblock(fd); + return qemu_chr_open_tty_fd(fd); +} +#endif + +#ifdef HAVE_CHARDEV_PARPORT +static CharDriverState *qmp_chardev_open_parallel(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevHostdev *parallel = backend->u.parallel; + int fd; + + fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp); + if (fd < 0) { + return NULL; + } + return qemu_chr_open_pp_fd(fd, errp); +} +#endif + +#endif /* WIN32 */ + +static void socket_try_connect(CharDriverState *chr) +{ + Error *err = NULL; + + if (!qemu_chr_open_socket_fd(chr, &err)) { + check_report_connect_error(chr, err); + } +} + +static gboolean socket_reconnect_timeout(gpointer opaque) +{ + CharDriverState *chr = opaque; + TCPCharDriver *s = chr->opaque; + + s->reconnect_timer = 0; + + if (chr->be_open) { + return false; + } + + socket_try_connect(chr); + + return false; +} + +static CharDriverState *qmp_chardev_open_socket(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + CharDriverState *chr; + TCPCharDriver *s; + ChardevSocket *sock = backend->u.socket; + SocketAddress *addr = sock->addr; + bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; + bool is_listen = sock->has_server ? sock->server : true; + bool is_telnet = sock->has_telnet ? sock->telnet : false; + bool is_waitconnect = sock->has_wait ? sock->wait : false; + int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; + + chr = qemu_chr_alloc(); + s = g_new0(TCPCharDriver, 1); + + s->fd = -1; + s->listen_fd = -1; + s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX; + s->is_listen = is_listen; + s->is_telnet = is_telnet; + s->do_nodelay = do_nodelay; + qapi_copy_SocketAddress(&s->addr, sock->addr); + + chr->opaque = s; + chr->chr_write = tcp_chr_write; + chr->chr_sync_read = tcp_chr_sync_read; + chr->chr_close = tcp_chr_close; + chr->get_msgfds = tcp_get_msgfds; + chr->set_msgfds = tcp_set_msgfds; + 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; + + chr->filename = g_malloc(CHR_MAX_FILENAME_SIZE); + SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE, "disconnected:", + addr, is_listen, is_telnet); + + if (is_listen) { + if (is_telnet) { + s->do_telnetopt = 1; + } + } else if (reconnect > 0) { + s->reconnect_time = reconnect; + } + + if (s->reconnect_time) { + socket_try_connect(chr); + } else if (!qemu_chr_open_socket_fd(chr, errp)) { + g_free(s); + g_free(chr->filename); + g_free(chr); + return NULL; + } + + 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 *qmp_chardev_open_udp(const char *id, + ChardevBackend *backend, + ChardevReturn *ret, + Error **errp) +{ + ChardevUdp *udp = backend->u.udp; + int fd; + + fd = socket_dgram(udp->remote, udp->local, errp); + if (fd < 0) { + return NULL; + } + return qemu_chr_open_udp_fd(fd); +} + +ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend, + Error **errp) +{ + ChardevReturn *ret = g_new0(ChardevReturn, 1); + CharDriverState *chr = NULL; + Error *local_err = NULL; + GSList *i; + CharDriver *cd; + + chr = qemu_chr_find(id); + if (chr) { + error_setg(errp, "Chardev '%s' already exists", id); + g_free(ret); + return NULL; + } + + for (i = backends; i; i = i->next) { + cd = i->data; + + if (cd->kind == backend->type) { + chr = cd->create(id, backend, ret, &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto out_error; + } + break; + } + } + + if (chr == NULL) { + assert(!i); + error_setg(errp, "chardev backend not available"); + goto out_error; + } + + chr->label = g_strdup(id); + chr->avail_connections = + (backend->type == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1; + if (!chr->filename) { + chr->filename = g_strdup(ChardevBackendKind_lookup[backend->type]); + } + if (!chr->explicit_be_open) { + qemu_chr_be_event(chr, CHR_EVENT_OPENED); + } + QTAILQ_INSERT_TAIL(&chardevs, chr, next); + return ret; + +out_error: + g_free(ret); + return NULL; +} + +void qmp_chardev_remove(const char *id, Error **errp) +{ + CharDriverState *chr; + + chr = qemu_chr_find(id); + if (chr == NULL) { + error_setg(errp, "Chardev '%s' not found", id); + return; + } + if (chr->chr_can_read || chr->chr_read || + chr->chr_event || chr->handler_opaque) { + error_setg(errp, "Chardev '%s' is busy", id); + return; + } + qemu_chr_delete(chr); +} + +static void register_types(void) +{ + register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL, + qemu_chr_open_null); + register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET, + qemu_chr_parse_socket, qmp_chardev_open_socket); + register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp, + qmp_chardev_open_udp); + register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF, + qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf); + register_char_driver("file", CHARDEV_BACKEND_KIND_FILE, + qemu_chr_parse_file_out, qmp_chardev_open_file); + register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO, + qemu_chr_parse_stdio, qemu_chr_open_stdio); +#if defined HAVE_CHARDEV_SERIAL + register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL, + qemu_chr_parse_serial, qmp_chardev_open_serial); + register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL, + qemu_chr_parse_serial, qmp_chardev_open_serial); +#endif +#ifdef HAVE_CHARDEV_PARPORT + register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL, + qemu_chr_parse_parallel, qmp_chardev_open_parallel); + register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL, + qemu_chr_parse_parallel, qmp_chardev_open_parallel); +#endif +#ifdef HAVE_CHARDEV_PTY + register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL, + qemu_chr_open_pty); +#endif +#ifdef _WIN32 + register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL, + qemu_chr_open_win_con); +#endif + register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE, + qemu_chr_parse_pipe, qemu_chr_open_pipe); + register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux, + qemu_chr_open_mux); + /* Bug-compatibility: */ + register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY, + qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf); + /* this must be done after machine init, since we register FEs with muxes + * as part of realize functions like serial_isa_realizefn when -nographic + * is specified + */ + qemu_add_machine_init_done_notifier(&muxes_realize_notify); +} + +type_init(register_types); |
