diff options
Diffstat (limited to 'qemu-char.c')
| -rw-r--r-- | qemu-char.c | 2202 |
1 files changed, 2202 insertions, 0 deletions
diff --git a/qemu-char.c b/qemu-char.c new file mode 100644 index 0000000000..0a940a7f5f --- /dev/null +++ b/qemu-char.c @@ -0,0 +1,2202 @@ +/* + * 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 "net.h" +#include "console.h" +#include "sysemu.h" +#include "qemu-timer.h" +#include "qemu-char.h" +#include "block.h" + +#include <unistd.h> +#include <fcntl.h> +#include <signal.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/socket.h> +#include <netinet/in.h> +#include <dirent.h> +#include <netdb.h> +#include <sys/select.h> +#include <arpa/inet.h> +#ifdef _BSD +#include <sys/stat.h> +#if !defined(__APPLE__) && !defined(__OpenBSD__) +#include <libutil.h> +#endif +#ifdef __OpenBSD__ +#include <net/if.h> +#endif +#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__) +#include <freebsd/stdlib.h> +#else +#ifdef __linux__ +#include <linux/if.h> +#include <pty.h> + +#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> +#include <net/if.h> +#include <syslog.h> +#include <stropts.h> +#endif +#endif +#endif + +#include "qemu_socket.h" + +/***********************************************************/ +/* character device */ + +static void qemu_chr_event(CharDriverState *s, int event) +{ + if (!s->chr_event) + return; + s->chr_event(s->handler_opaque, event); +} + +static void qemu_chr_reset_bh(void *opaque) +{ + CharDriverState *s = opaque; + qemu_chr_event(s, CHR_EVENT_RESET); + qemu_bh_delete(s->bh); + s->bh = NULL; +} + +void qemu_chr_reset(CharDriverState *s) +{ + if (s->bh == NULL) { + s->bh = qemu_bh_new(qemu_chr_reset_bh, s); + qemu_bh_schedule(s->bh); + } +} + +int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len) +{ + return s->chr_write(s, buf, len); +} + +int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg) +{ + if (!s->chr_ioctl) + return -ENOTSUP; + return s->chr_ioctl(s, cmd, arg); +} + +int qemu_chr_can_read(CharDriverState *s) +{ + if (!s->chr_can_read) + return 0; + return s->chr_can_read(s->handler_opaque); +} + +void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len) +{ + s->chr_read(s->handler_opaque, buf, len); +} + +void qemu_chr_accept_input(CharDriverState *s) +{ + if (s->chr_accept_input) + s->chr_accept_input(s); +} + +void qemu_chr_printf(CharDriverState *s, const char *fmt, ...) +{ + char buf[4096]; + va_list ap; + va_start(ap, fmt); + vsnprintf(buf, sizeof(buf), fmt, ap); + qemu_chr_write(s, (uint8_t *)buf, strlen(buf)); + va_end(ap); +} + +void qemu_chr_send_event(CharDriverState *s, int event) +{ + if (s->chr_send_event) + s->chr_send_event(s, event); +} + +void qemu_chr_add_handlers(CharDriverState *s, + IOCanRWHandler *fd_can_read, + IOReadHandler *fd_read, + IOEventHandler *fd_event, + void *opaque) +{ + s->chr_can_read = fd_can_read; + s->chr_read = fd_read; + s->chr_event = fd_event; + s->handler_opaque = opaque; + if (s->chr_update_read_handler) + s->chr_update_read_handler(s); +} + +static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + return len; +} + +static CharDriverState *qemu_chr_open_null(void) +{ + CharDriverState *chr; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + chr->chr_write = null_chr_write; + return chr; +} + +/* MUX driver for serial I/O splitting */ +static int term_timestamps; +static int64_t term_timestamps_start; +#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 { + IOCanRWHandler *chr_can_read[MAX_MUX]; + IOReadHandler *chr_read[MAX_MUX]; + IOEventHandler *chr_event[MAX_MUX]; + void *ext_opaque[MAX_MUX]; + CharDriverState *drv; + unsigned char buffer[MUX_BUFFER_SIZE]; + int prod; + int cons; + int mux_cnt; + int term_got_escape; + int max_size; +} MuxDriver; + + +static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + MuxDriver *d = chr->opaque; + int ret; + if (!term_timestamps) { + ret = d->drv->chr_write(d->drv, buf, len); + } else { + int i; + + ret = 0; + for(i = 0; i < len; i++) { + ret += d->drv->chr_write(d->drv, buf+i, 1); + if (buf[i] == '\n') { + char buf1[64]; + int64_t ti; + int secs; + + ti = qemu_get_clock(rt_clock); + if (term_timestamps_start == -1) + term_timestamps_start = ti; + ti -= term_timestamps_start; + secs = ti / 1000000000; + snprintf(buf1, sizeof(buf1), + "[%02d:%02d:%02d.%03d] ", + secs / 3600, + (secs / 60) % 60, + secs % 60, + (int)((ti / 1000000) % 1000)); + d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1)); + } + } + } + return ret; +} + +static const char * const mux_help[] = { + "% h print this help\n\r", + "% x exit emulator\n\r", + "% s save disk data back to file (if -snapshot)\n\r", + "% t toggle console timestamps\n\r" + "% b send break (magic sysrq)\n\r", + "% c switch between console and monitor\n\r", + "% % sends %\n\r", + NULL +}; + +int term_escape_char = 0x01; /* ctrl-a is used for escape */ +static void mux_print_help(CharDriverState *chr) +{ + int i, j; + char ebuf[15] = "Escape-Char"; + char cbuf[50] = "\n\r"; + + if (term_escape_char > 0 && term_escape_char < 26) { + snprintf(cbuf, sizeof(cbuf), "\n\r"); + snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a'); + } else { + snprintf(cbuf, sizeof(cbuf), + "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r", + term_escape_char); + } + chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf)); + for (i = 0; mux_help[i] != NULL; i++) { + for (j=0; mux_help[i][j] != '\0'; j++) { + if (mux_help[i][j] == '%') + chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf)); + else + chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1); + } + } +} + +static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch) +{ + if (d->term_got_escape) { + d->term_got_escape = 0; + if (ch == term_escape_char) + goto send_char; + switch(ch) { + case '?': + case 'h': + mux_print_help(chr); + break; + case 'x': + { + const char *term = "QEMU: Terminated\n\r"; + chr->chr_write(chr,(uint8_t *)term,strlen(term)); + exit(0); + break; + } + case 's': + { + int i; + for (i = 0; i < nb_drives; i++) { + bdrv_commit(drives_table[i].bdrv); + } + } + break; + case 'b': + qemu_chr_event(chr, CHR_EVENT_BREAK); + break; + case 'c': + /* Switch to the next registered device */ + chr->focus++; + if (chr->focus >= d->mux_cnt) + chr->focus = 0; + break; + case 't': + term_timestamps = !term_timestamps; + term_timestamps_start = -1; + 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) +{ + int m = chr->focus; + MuxDriver *d = chr->opaque; + + while (d->prod != d->cons && + d->chr_can_read[m] && + d->chr_can_read[m](d->ext_opaque[m])) { + d->chr_read[m](d->ext_opaque[m], + &d->buffer[d->cons++ & MUX_BUFFER_MASK], 1); + } +} + +static int mux_chr_can_read(void *opaque) +{ + CharDriverState *chr = opaque; + MuxDriver *d = chr->opaque; + + if ((d->prod - d->cons) < MUX_BUFFER_SIZE) + return 1; + if (d->chr_can_read[chr->focus]) + return d->chr_can_read[chr->focus](d->ext_opaque[chr->focus]); + return 0; +} + +static void mux_chr_read(void *opaque, const uint8_t *buf, int size) +{ + CharDriverState *chr = opaque; + MuxDriver *d = chr->opaque; + int m = chr->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 == d->cons && + 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[d->prod++ & 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++) + if (d->chr_event[i]) + d->chr_event[i](d->ext_opaque[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); + } + chr->focus = d->mux_cnt; + d->mux_cnt++; +} + +static CharDriverState *qemu_chr_open_mux(CharDriverState *drv) +{ + CharDriverState *chr; + MuxDriver *d; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + d = qemu_mallocz(sizeof(MuxDriver)); + if (!d) { + free(chr); + return NULL; + } + + chr->opaque = d; + d->drv = drv; + chr->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; + return chr; +} + + +#ifdef _WIN32 +int send_all(int fd, const uint8_t *buf, int len1) +{ + int ret, len; + + len = len1; + while (len > 0) { + ret = send(fd, buf, len, 0); + if (ret < 0) { + int errno; + errno = WSAGetLastError(); + if (errno != WSAEWOULDBLOCK) { + return -1; + } + } else if (ret == 0) { + break; + } else { + buf += ret; + len -= ret; + } + } + return len1 - len; +} + +#else + +static int unix_write(int fd, const uint8_t *buf, int len1) +{ + int ret, len; + + 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; +} + +inline int send_all(int fd, const uint8_t *buf, int len1) +{ + return unix_write(fd, buf, len1); +} +#endif /* !_WIN32 */ + +#ifndef _WIN32 + +typedef struct { + int fd_in, fd_out; + int max_size; +} FDCharDriver; + +#define STDIO_MAX_CLIENTS 1 +static int stdio_nb_clients = 0; + +static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + FDCharDriver *s = chr->opaque; + return send_all(s->fd_out, buf, len); +} + +static int fd_chr_read_poll(void *opaque) +{ + CharDriverState *chr = opaque; + FDCharDriver *s = chr->opaque; + + s->max_size = qemu_chr_can_read(chr); + return s->max_size; +} + +static void fd_chr_read(void *opaque) +{ + CharDriverState *chr = opaque; + FDCharDriver *s = chr->opaque; + int size, len; + uint8_t buf[1024]; + + len = sizeof(buf); + if (len > s->max_size) + len = s->max_size; + if (len == 0) + return; + size = read(s->fd_in, buf, len); + if (size == 0) { + /* FD has been closed. Remove it from the active list. */ + qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL); + return; + } + if (size > 0) { + qemu_chr_read(chr, buf, size); + } +} + +static void fd_chr_update_read_handler(CharDriverState *chr) +{ + FDCharDriver *s = chr->opaque; + + if (s->fd_in >= 0) { + if (nographic && s->fd_in == 0) { + } else { + qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll, + fd_chr_read, NULL, chr); + } + } +} + +static void fd_chr_close(struct CharDriverState *chr) +{ + FDCharDriver *s = chr->opaque; + + if (s->fd_in >= 0) { + if (nographic && s->fd_in == 0) { + } else { + qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL); + } + } + + qemu_free(s); +} + +/* 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_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + s = qemu_mallocz(sizeof(FDCharDriver)); + if (!s) { + free(chr); + return NULL; + } + s->fd_in = fd_in; + s->fd_out = fd_out; + chr->opaque = s; + chr->chr_write = fd_chr_write; + chr->chr_update_read_handler = fd_chr_update_read_handler; + chr->chr_close = fd_chr_close; + + qemu_chr_reset(chr); + + return chr; +} + +static CharDriverState *qemu_chr_open_file_out(const char *file_out) +{ + int fd_out; + + TFR(fd_out = open(file_out, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666)); + if (fd_out < 0) + return NULL; + return qemu_chr_open_fd(-1, fd_out); +} + +static CharDriverState *qemu_chr_open_pipe(const char *filename) +{ + int fd_in, fd_out; + char filename_in[256], filename_out[256]; + + snprintf(filename_in, 256, "%s.in", filename); + snprintf(filename_out, 256, "%s.out", filename); + TFR(fd_in = open(filename_in, O_RDWR | O_BINARY)); + TFR(fd_out = 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 = open(filename, O_RDWR | O_BINARY)); + if (fd_in < 0) + return NULL; + } + return qemu_chr_open_fd(fd_in, fd_out); +} + + +/* for STDIO, we handle the case where several clients use it + (nographic mode) */ + +#define TERM_FIFO_MAX_SIZE 1 + +static uint8_t term_fifo[TERM_FIFO_MAX_SIZE]; +static int term_fifo_size; + +static int stdio_read_poll(void *opaque) +{ + CharDriverState *chr = opaque; + + /* try to flush the queue if needed */ + if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) { + qemu_chr_read(chr, term_fifo, 1); + term_fifo_size = 0; + } + /* see if we can absorb more chars */ + if (term_fifo_size == 0) + return 1; + else + return 0; +} + +static void stdio_read(void *opaque) +{ + int size; + uint8_t buf[1]; + CharDriverState *chr = opaque; + + size = read(0, buf, 1); + if (size == 0) { + /* stdin has been closed. Remove it from the active list. */ + qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL); + return; + } + if (size > 0) { + if (qemu_chr_can_read(chr) > 0) { + qemu_chr_read(chr, buf, 1); + } else if (term_fifo_size == 0) { + term_fifo[term_fifo_size++] = buf[0]; + } + } +} + +/* init terminal so that we can grab keys */ +static struct termios oldtty; +static int old_fd0_flags; +static int term_atexit_done; + +static void term_exit(void) +{ + tcsetattr (0, TCSANOW, &oldtty); + fcntl(0, F_SETFL, old_fd0_flags); +} + +static void term_init(void) +{ + struct termios tty; + + tcgetattr (0, &tty); + oldtty = tty; + old_fd0_flags = fcntl(0, F_GETFL); + + tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP + |INLCR|IGNCR|ICRNL|IXON); + tty.c_oflag |= OPOST; + tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); + /* if graphical mode, we allow Ctrl-C handling */ + if (nographic) + tty.c_lflag &= ~ISIG; + tty.c_cflag &= ~(CSIZE|PARENB); + tty.c_cflag |= CS8; + tty.c_cc[VMIN] = 1; + tty.c_cc[VTIME] = 0; + + tcsetattr (0, TCSANOW, &tty); + + if (!term_atexit_done++) + atexit(term_exit); + + fcntl(0, F_SETFL, O_NONBLOCK); +} + +static void qemu_chr_close_stdio(struct CharDriverState *chr) +{ + term_exit(); + stdio_nb_clients--; + qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL); + fd_chr_close(chr); +} + +static CharDriverState *qemu_chr_open_stdio(void) +{ + CharDriverState *chr; + + if (stdio_nb_clients >= STDIO_MAX_CLIENTS) + return NULL; + chr = qemu_chr_open_fd(0, 1); + chr->chr_close = qemu_chr_close_stdio; + qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr); + stdio_nb_clients++; + term_init(); + + return chr; +} + +#ifdef __sun__ +/* Once Solaris has openpty(), this is going to be removed. */ +int openpty(int *amaster, int *aslave, char *name, + struct termios *termp, struct winsize *winp) +{ + const char *slave; + int mfd = -1, sfd = -1; + + *amaster = *aslave = -1; + + mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY); + if (mfd < 0) + goto err; + + if (grantpt(mfd) == -1 || unlockpt(mfd) == -1) + goto err; + + if ((slave = ptsname(mfd)) == NULL) + goto err; + + if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1) + goto err; + + if (ioctl(sfd, I_PUSH, "ptem") == -1 || + (termp != NULL && tcgetattr(sfd, termp) < 0)) + goto err; + + if (amaster) + *amaster = mfd; + if (aslave) + *aslave = sfd; + if (winp) + ioctl(sfd, TIOCSWINSZ, winp); + + return 0; + +err: + if (sfd != -1) + close(sfd); + close(mfd); + return -1; +} + +void cfmakeraw (struct termios *termios_p) +{ + termios_p->c_iflag &= + ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); + termios_p->c_oflag &= ~OPOST; + termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); + termios_p->c_cflag &= ~(CSIZE|PARENB); + termios_p->c_cflag |= CS8; + + termios_p->c_cc[VMIN] = 0; + termios_p->c_cc[VTIME] = 0; +} +#endif + +#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ + || defined(__NetBSD__) || defined(__OpenBSD__) + +typedef struct { + int fd; + int connected; + int polling; + int read_bytes; + QEMUTimer *timer; +} PtyCharDriver; + +static void pty_chr_update_read_handler(CharDriverState *chr); +static void pty_chr_state(CharDriverState *chr, int connected); + +static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + PtyCharDriver *s = chr->opaque; + + if (!s->connected) { + /* guest sends data, check for (re-)connect */ + pty_chr_update_read_handler(chr); + return 0; + } + return send_all(s->fd, buf, len); +} + +static int pty_chr_read_poll(void *opaque) +{ + CharDriverState *chr = opaque; + PtyCharDriver *s = chr->opaque; + + s->read_bytes = qemu_chr_can_read(chr); + return s->read_bytes; +} + +static void pty_chr_read(void *opaque) +{ + CharDriverState *chr = opaque; + PtyCharDriver *s = chr->opaque; + int size, len; + uint8_t buf[1024]; + + len = sizeof(buf); + if (len > s->read_bytes) + len = s->read_bytes; + if (len == 0) + return; + size = read(s->fd, buf, len); + if ((size == -1 && errno == EIO) || + (size == 0)) { + pty_chr_state(chr, 0); + return; + } + if (size > 0) { + pty_chr_state(chr, 1); + qemu_chr_read(chr, buf, size); + } +} + +static void pty_chr_update_read_handler(CharDriverState *chr) +{ + PtyCharDriver *s = chr->opaque; + + qemu_set_fd_handler2(s->fd, pty_chr_read_poll, + pty_chr_read, NULL, chr); + s->polling = 1; + /* + * Short timeout here: just need wait long enougth that qemu makes + * it through the poll loop once. When reconnected we want a + * short timeout so we notice it almost instantly. Otherwise + * read() gives us -EIO instantly, making pty_chr_state() reset the + * timeout to the normal (much longer) poll interval before the + * timer triggers. + */ + qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 10); +} + +static void pty_chr_state(CharDriverState *chr, int connected) +{ + PtyCharDriver *s = chr->opaque; + + if (!connected) { + qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); + s->connected = 0; + s->polling = 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. */ + qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 1000); + } else { + if (!s->connected) + qemu_chr_reset(chr); + s->connected = 1; + } +} + +static void pty_chr_timer(void *opaque) +{ + struct CharDriverState *chr = opaque; + PtyCharDriver *s = chr->opaque; + + if (s->connected) + return; + if (s->polling) { + /* If we arrive here without polling being cleared due + * read returning -EIO, then we are (re-)connected */ + pty_chr_state(chr, 1); + return; + } + + /* Next poll ... */ + pty_chr_update_read_handler(chr); +} + +static void pty_chr_close(struct CharDriverState *chr) +{ + PtyCharDriver *s = chr->opaque; + + qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); + close(s->fd); + qemu_free(s); +} + +static CharDriverState *qemu_chr_open_pty(void) +{ + CharDriverState *chr; + PtyCharDriver *s; + struct termios tty; + int slave_fd, len; +#if defined(__OpenBSD__) + char pty_name[PATH_MAX]; +#define q_ptsname(x) pty_name +#else + char *pty_name = NULL; +#define q_ptsname(x) ptsname(x) +#endif + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + s = qemu_mallocz(sizeof(PtyCharDriver)); + if (!s) { + qemu_free(chr); + return NULL; + } + + if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) { + return NULL; + } + + /* Set raw attributes on the pty. */ + cfmakeraw(&tty); + tcsetattr(slave_fd, TCSAFLUSH, &tty); + close(slave_fd); + + len = strlen(q_ptsname(s->fd)) + 5; + chr->filename = qemu_malloc(len); + snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd)); + fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd)); + + 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; + + s->timer = qemu_new_timer(rt_clock, pty_chr_timer, chr); + + 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 MARGIN 1.1 + if (speed <= 50 * MARGIN) + spd = B50; + else if (speed <= 75 * MARGIN) + spd = B75; + else if (speed <= 300 * MARGIN) + spd = B300; + else if (speed <= 600 * MARGIN) + spd = B600; + else if (speed <= 1200 * MARGIN) + spd = B1200; + else if (speed <= 2400 * MARGIN) + spd = B2400; + else if (speed <= 4800 * MARGIN) + spd = B4800; + else if (speed <= 9600 * MARGIN) + spd = B9600; + else if (speed <= 19200 * MARGIN) + spd = B19200; + else if (speed <= 38400 * MARGIN) + spd = B38400; + else if (speed <= 57600 * MARGIN) + spd = B57600; + else if (speed <= 115200 * MARGIN) + spd = B115200; + else + spd = B115200; + + 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(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(s->fd_in, 1); + } + break; + case CHR_IOCTL_SERIAL_GET_TIOCM: + { + int sarg = 0; + int *targ = (int *)arg; + ioctl(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; + if (sarg | CHR_TIOCM_DTR) + targ |= TIOCM_DTR; + if (sarg | CHR_TIOCM_RTS) + targ |= TIOCM_RTS; + ioctl(s->fd_in, TIOCMSET, &targ); + } + break; + default: + return -ENOTSUP; + } + return 0; +} + +static CharDriverState *qemu_chr_open_tty(const char *filename) +{ + CharDriverState *chr; + int fd; + + TFR(fd = open(filename, O_RDWR | O_NONBLOCK)); + tty_serial_init(fd, 115200, 'N', 8, 1); + chr = qemu_chr_open_fd(fd, fd); + if (!chr) { + close(fd); + return NULL; + } + chr->chr_ioctl = tty_serial_ioctl; + qemu_chr_reset(chr); + return chr; +} +#else /* ! __linux__ && ! __sun__ */ +static CharDriverState *qemu_chr_open_pty(void) +{ + return NULL; +} +#endif /* __linux__ || __sun__ */ + +#if defined(__linux__) +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); + qemu_free(drv); +} + +static CharDriverState *qemu_chr_open_pp(const char *filename) +{ + CharDriverState *chr; + ParallelCharDriver *drv; + int fd; + + TFR(fd = open(filename, O_RDWR)); + if (fd < 0) + return NULL; + + if (ioctl(fd, PPCLAIM) < 0) { + close(fd); + return NULL; + } + + drv = qemu_mallocz(sizeof(ParallelCharDriver)); + if (!drv) { + close(fd); + return NULL; + } + drv->fd = fd; + drv->mode = IEEE1284_MODE_COMPAT; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) { + qemu_free(drv); + close(fd); + return NULL; + } + chr->chr_write = null_chr_write; + chr->chr_ioctl = pp_ioctl; + chr->chr_close = pp_close; + chr->opaque = drv; + + qemu_chr_reset(chr); + + return chr; +} +#endif /* __linux__ */ + +#else /* _WIN32 */ + +typedef struct { + int max_size; + HANDLE hcom, hrecv, hsend; + OVERLAPPED orecv, osend; + BOOL fpipe; + DWORD len; +} WinCharState; + +#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); +} + +static int win_chr_init(CharDriverState *chr, const char *filename) +{ + WinCharState *s = chr->opaque; + COMMCONFIG comcfg; + COMMTIMEOUTS cto = { 0, 0, 0, 0, 0}; + COMSTAT comstat; + DWORD size; + DWORD err; + + s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hsend) { + fprintf(stderr, "Failed CreateEvent\n"); + goto fail; + } + s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hrecv) { + fprintf(stderr, "Failed CreateEvent\n"); + goto fail; + } + + s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, + OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); + if (s->hcom == INVALID_HANDLE_VALUE) { + fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError()); + s->hcom = NULL; + goto fail; + } + + if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) { + fprintf(stderr, "Failed SetupComm\n"); + goto fail; + } + + ZeroMemory(&comcfg, sizeof(COMMCONFIG)); + size = sizeof(COMMCONFIG); + GetDefaultCommConfig(filename, &comcfg, &size); + comcfg.dcb.DCBlength = sizeof(DCB); + CommConfigDialog(filename, NULL, &comcfg); + + if (!SetCommState(s->hcom, &comcfg.dcb)) { + fprintf(stderr, "Failed SetCommState\n"); + goto fail; + } + + if (!SetCommMask(s->hcom, EV_ERR)) { + fprintf(stderr, "Failed SetCommMask\n"); + goto fail; + } + + cto.ReadIntervalTimeout = MAXDWORD; + if (!SetCommTimeouts(s->hcom, &cto)) { + fprintf(stderr, "Failed SetCommTimeouts\n"); + goto fail; + } + + if (!ClearCommError(s->hcom, &err, &comstat)) { + fprintf(stderr, "Failed ClearCommError\n"); + goto fail; + } + qemu_add_polling_cb(win_chr_poll, chr); + return 0; + + fail: + win_chr_close(chr); + return -1; +} + +static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1) +{ + WinCharState *s = chr->opaque; + DWORD len, ret, size, err; + + len = len1; + ZeroMemory(&s->osend, sizeof(s->osend)); + s->osend.hEvent = s->hsend; + while (len > 0) { + if (s->hsend) + ret = WriteFile(s->hcom, buf, len, &size, &s->osend); + else + ret = WriteFile(s->hcom, buf, len, &size, NULL); + if (!ret) { + err = GetLastError(); + if (err == ERROR_IO_PENDING) { + ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE); + if (ret) { + buf += size; + len -= size; + } else { + break; + } + } else { + break; + } + } else { + buf += size; + len -= size; + } + } + return len1 - len; +} + +static int win_chr_read_poll(CharDriverState *chr) +{ + WinCharState *s = chr->opaque; + + s->max_size = qemu_chr_can_read(chr); + return s->max_size; +} + +static void win_chr_readfile(CharDriverState *chr) +{ + WinCharState *s = chr->opaque; + int ret, err; + uint8_t buf[1024]; + 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_read(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(const char *filename) +{ + CharDriverState *chr; + WinCharState *s; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + s = qemu_mallocz(sizeof(WinCharState)); + if (!s) { + free(chr); + return NULL; + } + chr->opaque = s; + chr->chr_write = win_chr_write; + chr->chr_close = win_chr_close; + + if (win_chr_init(chr, filename) < 0) { + free(s); + free(chr); + return NULL; + } + qemu_chr_reset(chr); + return chr; +} + +static int win_chr_pipe_poll(void *opaque) +{ + CharDriverState *chr = opaque; + WinCharState *s = chr->opaque; + DWORD size; + + PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL); + if (size > 0) { + s->len = size; + win_chr_read_poll(chr); + win_chr_read(chr); + return 1; + } + return 0; +} + +static int win_chr_pipe_init(CharDriverState *chr, const char *filename) +{ + WinCharState *s = chr->opaque; + OVERLAPPED ov; + int ret; + DWORD size; + char openname[256]; + + s->fpipe = TRUE; + + s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hsend) { + fprintf(stderr, "Failed CreateEvent\n"); + goto fail; + } + s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hrecv) { + fprintf(stderr, "Failed CreateEvent\n"); + goto fail; + } + + snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename); + s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, + PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | + PIPE_WAIT, + MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL); + if (s->hcom == INVALID_HANDLE_VALUE) { + fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError()); + s->hcom = NULL; + goto fail; + } + + ZeroMemory(&ov, sizeof(ov)); + ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + ret = ConnectNamedPipe(s->hcom, &ov); + if (ret) { + fprintf(stderr, "Failed ConnectNamedPipe\n"); + goto fail; + } + + ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE); + if (!ret) { + fprintf(stderr, "Failed GetOverlappedResult\n"); + if (ov.hEvent) { + CloseHandle(ov.hEvent); + ov.hEvent = NULL; + } + goto fail; + } + + if (ov.hEvent) { + CloseHandle(ov.hEvent); + ov.hEvent = NULL; + } + qemu_add_polling_cb(win_chr_pipe_poll, chr); + return 0; + + fail: + win_chr_close(chr); + return -1; +} + + +static CharDriverState *qemu_chr_open_win_pipe(const char *filename) +{ + CharDriverState *chr; + WinCharState *s; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + s = qemu_mallocz(sizeof(WinCharState)); + if (!s) { + free(chr); + return NULL; + } + chr->opaque = s; + chr->chr_write = win_chr_write; + chr->chr_close = win_chr_close; + + if (win_chr_pipe_init(chr, filename) < 0) { + free(s); + free(chr); + return NULL; + } + qemu_chr_reset(chr); + return chr; +} + +static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out) +{ + CharDriverState *chr; + WinCharState *s; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + return NULL; + s = qemu_mallocz(sizeof(WinCharState)); + if (!s) { + free(chr); + return NULL; + } + s->hcom = fd_out; + chr->opaque = s; + chr->chr_write = win_chr_write; + qemu_chr_reset(chr); + return chr; +} + +static CharDriverState *qemu_chr_open_win_con(const char *filename) +{ + return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE)); +} + +static CharDriverState *qemu_chr_open_win_file_out(const char *file_out) +{ + HANDLE fd_out; + + fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL, + OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); + if (fd_out == INVALID_HANDLE_VALUE) + return NULL; + + return qemu_chr_open_win_file(fd_out); +} +#endif /* !_WIN32 */ + +/***********************************************************/ +/* UDP Net console */ + +typedef struct { + int fd; + struct sockaddr_in daddr; + uint8_t buf[1024]; + int bufcnt; + int bufptr; + int max_size; +} NetCharDriver; + +static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + NetCharDriver *s = chr->opaque; + + return sendto(s->fd, buf, len, 0, + (struct sockaddr *)&s->daddr, sizeof(struct sockaddr_in)); +} + +static int udp_chr_read_poll(void *opaque) +{ + CharDriverState *chr = opaque; + NetCharDriver *s = chr->opaque; + + s->max_size = qemu_chr_can_read(chr); + + /* If there were any stray characters in the queue process them + * first + */ + while (s->max_size > 0 && s->bufptr < s->bufcnt) { + qemu_chr_read(chr, &s->buf[s->bufptr], 1); + s->bufptr++; + s->max_size = qemu_chr_can_read(chr); + } + return s->max_size; +} + +static void udp_chr_read(void *opaque) +{ + CharDriverState *chr = opaque; + NetCharDriver *s = chr->opaque; + + if (s->max_size == 0) + return; + s->bufcnt = recv(s->fd, s->buf, sizeof(s->buf), 0); + s->bufptr = s->bufcnt; + if (s->bufcnt <= 0) + return; + + s->bufptr = 0; + while (s->max_size > 0 && s->bufptr < s->bufcnt) { + qemu_chr_read(chr, &s->buf[s->bufptr], 1); + s->bufptr++; + s->max_size = qemu_chr_can_read(chr); + } +} + +static void udp_chr_update_read_handler(CharDriverState *chr) +{ + NetCharDriver *s = chr->opaque; + + if (s->fd >= 0) { + qemu_set_fd_handler2(s->fd, udp_chr_read_poll, + udp_chr_read, NULL, chr); + } +} + +static CharDriverState *qemu_chr_open_udp(const char *def) +{ + CharDriverState *chr = NULL; + NetCharDriver *s = NULL; + int fd = -1; + struct sockaddr_in saddr; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + goto return_err; + s = qemu_mallocz(sizeof(NetCharDriver)); + if (!s) + goto return_err; + + fd = socket(PF_INET, SOCK_DGRAM, 0); + if (fd < 0) { + perror("socket(PF_INET, SOCK_DGRAM)"); + goto return_err; + } + + if (parse_host_src_port(&s->daddr, &saddr, def) < 0) { + printf("Could not parse: %s\n", def); + goto return_err; + } + + if (bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0) + { + perror("bind"); + goto return_err; + } + + s->fd = 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; + return chr; + +return_err: + if (chr) + free(chr); + if (s) + free(s); + if (fd >= 0) + closesocket(fd); + return NULL; +} + +/***********************************************************/ +/* TCP Net console */ + +typedef struct { + int fd, listen_fd; + int connected; + int max_size; + int do_telnetopt; + int do_nodelay; + int is_unix; +} TCPCharDriver; + +static void tcp_chr_accept(void *opaque); + +static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) +{ + TCPCharDriver *s = chr->opaque; + if (s->connected) { + return send_all(s->fd, 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_can_read(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_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 void tcp_chr_read(void *opaque) +{ + CharDriverState *chr = opaque; + TCPCharDriver *s = chr->opaque; + uint8_t buf[1024]; + int len, size; + + if (!s->connected || s->max_size <= 0) + return; + len = sizeof(buf); + if (len > s->max_size) + len = s->max_size; + size = recv(s->fd, buf, len, 0); + if (size == 0) { + /* connection closed */ + s->connected = 0; + if (s->listen_fd >= 0) { + qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr); + } + qemu_set_fd_handler(s->fd, NULL, NULL, NULL); + closesocket(s->fd); + s->fd = -1; + } else if (size > 0) { + if (s->do_telnetopt) + tcp_chr_process_IAC_bytes(chr, s, buf, &size); + if (size > 0) + qemu_chr_read(chr, buf, size); + } +} + +static void tcp_chr_connect(void *opaque) +{ + CharDriverState *chr = opaque; + TCPCharDriver *s = chr->opaque; + + s->connected = 1; + qemu_set_fd_handler2(s->fd, tcp_chr_read_poll, + tcp_chr_read, NULL, chr); + qemu_chr_reset(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 void socket_set_nodelay(int fd) +{ + int val = 1; + setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val)); +} + +static void tcp_chr_accept(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 = accept(s->listen_fd, addr, &len); + if (fd < 0 && errno != EINTR) { + return; + } else if (fd >= 0) { + if (s->do_telnetopt) + tcp_chr_telnet_init(fd); + break; + } + } + socket_set_nonblock(fd); + if (s->do_nodelay) + socket_set_nodelay(fd); + s->fd = fd; + qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL); + tcp_chr_connect(chr); +} + +static void tcp_chr_close(CharDriverState *chr) +{ + TCPCharDriver *s = chr->opaque; + if (s->fd >= 0) + closesocket(s->fd); + if (s->listen_fd >= 0) + closesocket(s->listen_fd); + qemu_free(s); +} + +static CharDriverState *qemu_chr_open_tcp(const char *host_str, + int is_telnet, + int is_unix) +{ + CharDriverState *chr = NULL; + TCPCharDriver *s = NULL; + int fd = -1, ret, err, val; + int is_listen = 0; + int is_waitconnect = 1; + int do_nodelay = 0; + const char *ptr; + struct sockaddr_in saddr; +#ifndef _WIN32 + struct sockaddr_un uaddr; +#endif + struct sockaddr *addr; + socklen_t addrlen; + +#ifndef _WIN32 + if (is_unix) { + addr = (struct sockaddr *)&uaddr; + addrlen = sizeof(uaddr); + if (parse_unix_path(&uaddr, host_str) < 0) + goto fail; + } else +#endif + { + addr = (struct sockaddr *)&saddr; + addrlen = sizeof(saddr); + if (parse_host_port(&saddr, host_str) < 0) + goto fail; + } + + ptr = host_str; + while((ptr = strchr(ptr,','))) { + ptr++; + if (!strncmp(ptr,"server",6)) { + is_listen = 1; + } else if (!strncmp(ptr,"nowait",6)) { + is_waitconnect = 0; + } else if (!strncmp(ptr,"nodelay",6)) { + do_nodelay = 1; + } else { + printf("Unknown option: %s\n", ptr); + goto fail; + } + } + if (!is_listen) + is_waitconnect = 0; + + chr = qemu_mallocz(sizeof(CharDriverState)); + if (!chr) + goto fail; + s = qemu_mallocz(sizeof(TCPCharDriver)); + if (!s) + goto fail; + +#ifndef _WIN32 + if (is_unix) + fd = socket(PF_UNIX, SOCK_STREAM, 0); + else +#endif + fd = socket(PF_INET, SOCK_STREAM, 0); + + if (fd < 0) + goto fail; + + if (!is_waitconnect) + socket_set_nonblock(fd); + + s->connected = 0; + s->fd = -1; + s->listen_fd = -1; + s->is_unix = is_unix; + s->do_nodelay = do_nodelay && !is_unix; + + chr->opaque = s; + chr->chr_write = tcp_chr_write; + chr->chr_close = tcp_chr_close; + + if (is_listen) { + /* allow fast reuse */ +#ifndef _WIN32 + if (is_unix) { + char path[109]; + pstrcpy(path, sizeof(path), uaddr.sun_path); + unlink(path); + } else +#endif + { + val = 1; + setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val)); + } + + ret = bind(fd, addr, addrlen); + if (ret < 0) + goto fail; + + ret = listen(fd, 0); + if (ret < 0) + goto fail; + + s->listen_fd = fd; + qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr); + if (is_telnet) + s->do_telnetopt = 1; + } else { + for(;;) { + ret = connect(fd, addr, addrlen); + if (ret < 0) { + err = socket_error(); + if (err == EINTR || err == EWOULDBLOCK) { + } else if (err == EINPROGRESS) { + break; +#ifdef _WIN32 + } else if (err == WSAEALREADY) { + break; +#endif + } else { + goto fail; + } + } else { + s->connected = 1; + break; + } + } + s->fd = fd; + socket_set_nodelay(fd); + if (s->connected) + tcp_chr_connect(chr); + else + qemu_set_fd_handler(s->fd, NULL, tcp_chr_connect, chr); + } + + if (is_listen && is_waitconnect) { + printf("QEMU waiting for connection on: %s\n", host_str); + tcp_chr_accept(chr); + socket_set_nonblock(s->listen_fd); + } + + return chr; + fail: + if (fd >= 0) + closesocket(fd); + qemu_free(s); + qemu_free(chr); + return NULL; +} + +static TAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs += TAILQ_HEAD_INITIALIZER(chardevs); + +CharDriverState *qemu_chr_open(const char *label, const char *filename) +{ + const char *p; + CharDriverState *chr; + + if (!strcmp(filename, "vc")) { + chr = text_console_init(&display_state, 0); + } else + if (strstart(filename, "vc:", &p)) { + chr = text_console_init(&display_state, p); + } else + if (!strcmp(filename, "null")) { + chr = qemu_chr_open_null(); + } else + if (strstart(filename, "tcp:", &p)) { + chr = qemu_chr_open_tcp(p, 0, 0); + } else + if (strstart(filename, "telnet:", &p)) { + chr = qemu_chr_open_tcp(p, 1, 0); + } else + if (strstart(filename, "udp:", &p)) { + chr = qemu_chr_open_udp(p); + } else + if (strstart(filename, "mon:", &p)) { + chr = qemu_chr_open(label, p); + if (chr) { + chr = qemu_chr_open_mux(chr); + monitor_init(chr, !nographic); + } else { + printf("Unable to open driver: %s\n", p); + } + } else +#ifndef _WIN32 + if (strstart(filename, "unix:", &p)) { + chr = qemu_chr_open_tcp(p, 0, 1); + } else if (strstart(filename, "file:", &p)) { + chr = qemu_chr_open_file_out(p); + } else if (strstart(filename, "pipe:", &p)) { + chr = qemu_chr_open_pipe(p); + } else if (!strcmp(filename, "pty")) { + chr = qemu_chr_open_pty(); + } else if (!strcmp(filename, "stdio")) { + chr = qemu_chr_open_stdio(); + } else +#if defined(__linux__) + if (strstart(filename, "/dev/parport", NULL)) { + chr = qemu_chr_open_pp(filename); + } else +#endif +#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ + || defined(__NetBSD__) || defined(__OpenBSD__) + if (strstart(filename, "/dev/", NULL)) { + chr = qemu_chr_open_tty(filename); + } else +#endif +#else /* !_WIN32 */ + if (strstart(filename, "COM", NULL)) { + chr = qemu_chr_open_win(filename); + } else + if (strstart(filename, "pipe:", &p)) { + chr = qemu_chr_open_win_pipe(p); + } else + if (strstart(filename, "con:", NULL)) { + chr = qemu_chr_open_win_con(filename); + } else + if (strstart(filename, "file:", &p)) { + chr = qemu_chr_open_win_file_out(p); + } else +#endif +#ifdef CONFIG_BRLAPI + if (!strcmp(filename, "braille")) { + chr = chr_baum_init(); + } else +#endif + { + chr = NULL; + } + + if (chr) { + if (!chr->filename) + chr->filename = qemu_strdup(filename); + chr->label = qemu_strdup(label); + TAILQ_INSERT_TAIL(&chardevs, chr, next); + } + return chr; +} + +void qemu_chr_close(CharDriverState *chr) +{ + TAILQ_REMOVE(&chardevs, chr, next); + if (chr->chr_close) + chr->chr_close(chr); + qemu_free(chr->filename); + qemu_free(chr->label); + qemu_free(chr); +} + +void qemu_chr_info(void) +{ + CharDriverState *chr; + + TAILQ_FOREACH(chr, &chardevs, next) { + term_printf("%s: filename=%s\n", chr->label, chr->filename); + } +} |