diff options
author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2016-12-12 18:41:00 +0300 |
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committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2017-01-31 23:31:21 +0400 |
commit | d24ca4b8c58e515abacacaeeb588b141cd8fad8b (patch) | |
tree | 985d4fbb5c2ca77eb32934f5f147e4c17bebb3e9 /chardev/char-socket.c | |
parent | 0e58f1777794424c64711ab5f96c5887fc712d93 (diff) | |
download | qemu-d24ca4b8c58e515abacacaeeb588b141cd8fad8b.zip qemu-d24ca4b8c58e515abacacaeeb588b141cd8fad8b.tar.gz qemu-d24ca4b8c58e515abacacaeeb588b141cd8fad8b.tar.bz2 |
char: move socket chardev to its own file
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'chardev/char-socket.c')
-rw-r--r-- | chardev/char-socket.c | 1017 |
1 files changed, 1017 insertions, 0 deletions
diff --git a/chardev/char-socket.c b/chardev/char-socket.c new file mode 100644 index 0000000..4068dc5 --- /dev/null +++ b/chardev/char-socket.c @@ -0,0 +1,1017 @@ +/* + * QEMU System Emulator + * + * Copyright (c) 2003-2008 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "sysemu/char.h" +#include "io/channel-socket.h" +#include "io/channel-tls.h" +#include "qemu/error-report.h" +#include "qapi/error.h" +#include "qapi/clone-visitor.h" + +#include "char-io.h" + +/***********************************************************/ +/* TCP Net console */ + +#define TCP_MAX_FDS 16 + +typedef struct { + Chardev parent; + QIOChannel *ioc; /* Client I/O channel */ + QIOChannelSocket *sioc; /* Client master channel */ + QIOChannelSocket *listen_ioc; + guint listen_tag; + QCryptoTLSCreds *tls_creds; + int connected; + int max_size; + int do_telnetopt; + int do_nodelay; + int is_unix; + int *read_msgfds; + size_t read_msgfds_num; + int *write_msgfds; + size_t write_msgfds_num; + + SocketAddress *addr; + bool is_listen; + bool is_telnet; + + guint reconnect_timer; + int64_t reconnect_time; + bool connect_err_reported; +} SocketChardev; + +#define SOCKET_CHARDEV(obj) \ + OBJECT_CHECK(SocketChardev, (obj), TYPE_CHARDEV_SOCKET) + +static gboolean socket_reconnect_timeout(gpointer opaque); + +static void qemu_chr_socket_restart_timer(Chardev *chr) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + char *name; + + assert(s->connected == 0); + s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time, + socket_reconnect_timeout, chr); + name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); + g_source_set_name_by_id(s->reconnect_timer, name); + g_free(name); +} + +static void check_report_connect_error(Chardev *chr, + Error *err) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + 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(QIOChannel *chan, + GIOCondition cond, + void *opaque); + +/* Called with chr_write_lock held. */ +static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + if (s->connected) { + int ret = io_channel_send_full(s->ioc, buf, len, + s->write_msgfds, + s->write_msgfds_num); + + /* 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 ret; + } else { + /* XXX: indicate an error ? */ + return len; + } +} + +static int tcp_chr_read_poll(void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + SocketChardev *s = SOCKET_CHARDEV(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(Chardev *chr, + SocketChardev *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(Chardev *chr, int *fds, int num) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + 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(Chardev *chr, int *fds, int num) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + /* clear old pending fd array */ + g_free(s->write_msgfds); + s->write_msgfds = NULL; + s->write_msgfds_num = 0; + + if (!s->connected || + !qio_channel_has_feature(s->ioc, + QIO_CHANNEL_FEATURE_FD_PASS)) { + return -1; + } + + if (num) { + s->write_msgfds = g_new(int, num); + memcpy(s->write_msgfds, fds, num * sizeof(int)); + } + + s->write_msgfds_num = num; + + return 0; +} + +static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + struct iovec iov = { .iov_base = buf, .iov_len = len }; + int ret; + size_t i; + int *msgfds = NULL; + size_t msgfds_num = 0; + + if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { + ret = qio_channel_readv_full(s->ioc, &iov, 1, + &msgfds, &msgfds_num, + NULL); + } else { + ret = qio_channel_readv_full(s->ioc, &iov, 1, + NULL, NULL, + NULL); + } + + if (ret == QIO_CHANNEL_ERR_BLOCK) { + errno = EAGAIN; + ret = -1; + } else if (ret == -1) { + errno = EIO; + } + + if (msgfds_num) { + /* 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 = msgfds; + s->read_msgfds_num = msgfds_num; + } + + 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 + } + + return ret; +} + +static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + return qio_channel_create_watch(s->ioc, cond); +} + +static void tcp_chr_free_connection(Chardev *chr) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + int i; + + if (!s->connected) { + return; + } + + if (s->read_msgfds_num) { + for (i = 0; i < s->read_msgfds_num; i++) { + close(s->read_msgfds[i]); + } + g_free(s->read_msgfds); + s->read_msgfds = NULL; + s->read_msgfds_num = 0; + } + + tcp_set_msgfds(chr, NULL, 0); + remove_fd_in_watch(chr); + object_unref(OBJECT(s->sioc)); + s->sioc = NULL; + object_unref(OBJECT(s->ioc)); + s->ioc = NULL; + g_free(chr->filename); + chr->filename = NULL; + s->connected = 0; +} + +static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr, + bool is_listen, bool is_telnet) +{ + switch (addr->type) { + case SOCKET_ADDRESS_KIND_INET: + return g_strdup_printf("%s%s:%s:%s%s", prefix, + is_telnet ? "telnet" : "tcp", + addr->u.inet.data->host, + addr->u.inet.data->port, + is_listen ? ",server" : ""); + break; + case SOCKET_ADDRESS_KIND_UNIX: + return g_strdup_printf("%sunix:%s%s", prefix, + addr->u.q_unix.data->path, + is_listen ? ",server" : ""); + break; + case SOCKET_ADDRESS_KIND_FD: + return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str, + is_listen ? ",server" : ""); + break; + default: + abort(); + } +} + +static void tcp_chr_disconnect(Chardev *chr) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + if (!s->connected) { + return; + } + + tcp_chr_free_connection(chr); + + if (s->listen_ioc) { + s->listen_tag = qio_channel_add_watch( + QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL); + } + chr->filename = SocketAddress_to_str("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(QIOChannel *chan, GIOCondition cond, void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + SocketChardev *s = SOCKET_CHARDEV(opaque); + uint8_t buf[CHR_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 == -1) { + /* 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(Chardev *chr, const uint8_t *buf, int len) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + 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; +} + +static char *sockaddr_to_str(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 g_strdup_printf("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 g_strdup_printf("%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 g_strdup_printf("unknown"); + } +} + +static void tcp_chr_connect(void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + SocketChardev *s = SOCKET_CHARDEV(opaque); + + g_free(chr->filename); + chr->filename = sockaddr_to_str( + &s->sioc->localAddr, s->sioc->localAddrLen, + &s->sioc->remoteAddr, s->sioc->remoteAddrLen, + s->is_listen, s->is_telnet); + + s->connected = 1; + if (s->ioc) { + chr->fd_in_tag = io_add_watch_poll(chr, s->ioc, + tcp_chr_read_poll, + tcp_chr_read, + chr, NULL); + } + qemu_chr_be_generic_open(chr); +} + +static void tcp_chr_update_read_handler(Chardev *chr, + GMainContext *context) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + if (!s->connected) { + return; + } + + remove_fd_in_watch(chr); + if (s->ioc) { + chr->fd_in_tag = io_add_watch_poll(chr, s->ioc, + tcp_chr_read_poll, + tcp_chr_read, chr, + context); + } +} + +typedef struct { + Chardev *chr; + char buf[12]; + size_t buflen; +} TCPChardevTelnetInit; + +static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, + GIOCondition cond G_GNUC_UNUSED, + gpointer user_data) +{ + TCPChardevTelnetInit *init = user_data; + ssize_t ret; + + ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); + if (ret < 0) { + if (ret == QIO_CHANNEL_ERR_BLOCK) { + ret = 0; + } else { + tcp_chr_disconnect(init->chr); + return FALSE; + } + } + init->buflen -= ret; + + if (init->buflen == 0) { + tcp_chr_connect(init->chr); + return FALSE; + } + + memmove(init->buf, init->buf + ret, init->buflen); + + return TRUE; +} + +static void tcp_chr_telnet_init(Chardev *chr) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + TCPChardevTelnetInit *init = g_new0(TCPChardevTelnetInit, 1); + size_t n = 0; + + init->chr = chr; + init->buflen = 12; + +#define IACSET(x, a, b, c) \ + do { \ + x[n++] = a; \ + x[n++] = b; \ + x[n++] = c; \ + } while (0) + + /* Prep the telnet negotion to put telnet in binary, + * no echo, single char mode */ + IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ + IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ + IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ + IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ + +#undef IACSET + + qio_channel_add_watch( + s->ioc, G_IO_OUT, + tcp_chr_telnet_init_io, + init, NULL); +} + + +static void tcp_chr_tls_handshake(QIOTask *task, + gpointer user_data) +{ + Chardev *chr = user_data; + SocketChardev *s = user_data; + + if (qio_task_propagate_error(task, NULL)) { + tcp_chr_disconnect(chr); + } else { + if (s->do_telnetopt) { + tcp_chr_telnet_init(chr); + } else { + tcp_chr_connect(chr); + } + } +} + + +static void tcp_chr_tls_init(Chardev *chr) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + QIOChannelTLS *tioc; + Error *err = NULL; + gchar *name; + + if (s->is_listen) { + tioc = qio_channel_tls_new_server( + s->ioc, s->tls_creds, + NULL, /* XXX Use an ACL */ + &err); + } else { + tioc = qio_channel_tls_new_client( + s->ioc, s->tls_creds, + s->addr->u.inet.data->host, + &err); + } + if (tioc == NULL) { + error_free(err); + tcp_chr_disconnect(chr); + return; + } + name = g_strdup_printf("chardev-tls-%s-%s", + s->is_listen ? "server" : "client", + chr->label); + qio_channel_set_name(QIO_CHANNEL(tioc), name); + g_free(name); + object_unref(OBJECT(s->ioc)); + s->ioc = QIO_CHANNEL(tioc); + + qio_channel_tls_handshake(tioc, + tcp_chr_tls_handshake, + chr, + NULL); +} + + +static void tcp_chr_set_client_ioc_name(Chardev *chr, + QIOChannelSocket *sioc) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + char *name; + name = g_strdup_printf("chardev-tcp-%s-%s", + s->is_listen ? "server" : "client", + chr->label); + qio_channel_set_name(QIO_CHANNEL(sioc), name); + g_free(name); + +} + +static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + + if (s->ioc != NULL) { + return -1; + } + + s->ioc = QIO_CHANNEL(sioc); + object_ref(OBJECT(sioc)); + s->sioc = sioc; + object_ref(OBJECT(sioc)); + + qio_channel_set_blocking(s->ioc, false, NULL); + + if (s->do_nodelay) { + qio_channel_set_delay(s->ioc, false); + } + if (s->listen_tag) { + g_source_remove(s->listen_tag); + s->listen_tag = 0; + } + + if (s->tls_creds) { + tcp_chr_tls_init(chr); + } else { + if (s->do_telnetopt) { + tcp_chr_telnet_init(chr); + } else { + tcp_chr_connect(chr); + } + } + + return 0; +} + + +static int tcp_chr_add_client(Chardev *chr, int fd) +{ + int ret; + QIOChannelSocket *sioc; + + sioc = qio_channel_socket_new_fd(fd, NULL); + if (!sioc) { + return -1; + } + tcp_chr_set_client_ioc_name(chr, sioc); + ret = tcp_chr_new_client(chr, sioc); + object_unref(OBJECT(sioc)); + return ret; +} + +static gboolean tcp_chr_accept(QIOChannel *channel, + GIOCondition cond, + void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + QIOChannelSocket *sioc; + + sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel), + NULL); + if (!sioc) { + return TRUE; + } + + tcp_chr_new_client(chr, sioc); + + object_unref(OBJECT(sioc)); + + return TRUE; +} + +static int tcp_chr_wait_connected(Chardev *chr, Error **errp) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + QIOChannelSocket *sioc; + + /* It can't wait on s->connected, since it is set asynchronously + * in TLS and telnet cases, only wait for an accepted socket */ + while (!s->ioc) { + if (s->is_listen) { + error_report("QEMU waiting for connection on: %s", + chr->filename); + qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL); + tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr); + qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL); + } else { + sioc = qio_channel_socket_new(); + tcp_chr_set_client_ioc_name(chr, sioc); + if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { + object_unref(OBJECT(sioc)); + return -1; + } + tcp_chr_new_client(chr, sioc); + object_unref(OBJECT(sioc)); + } + } + + return 0; +} + +static void char_socket_finalize(Object *obj) +{ + Chardev *chr = CHARDEV(obj); + SocketChardev *s = SOCKET_CHARDEV(obj); + + tcp_chr_free_connection(chr); + + if (s->reconnect_timer) { + g_source_remove(s->reconnect_timer); + s->reconnect_timer = 0; + } + qapi_free_SocketAddress(s->addr); + if (s->listen_tag) { + g_source_remove(s->listen_tag); + s->listen_tag = 0; + } + if (s->listen_ioc) { + object_unref(OBJECT(s->listen_ioc)); + } + if (s->tls_creds) { + object_unref(OBJECT(s->tls_creds)); + } + + qemu_chr_be_event(chr, CHR_EVENT_CLOSED); +} + +static void qemu_chr_socket_connected(QIOTask *task, void *opaque) +{ + QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); + Chardev *chr = CHARDEV(opaque); + SocketChardev *s = SOCKET_CHARDEV(chr); + Error *err = NULL; + + if (qio_task_propagate_error(task, &err)) { + check_report_connect_error(chr, err); + error_free(err); + goto cleanup; + } + + s->connect_err_reported = false; + tcp_chr_new_client(chr, sioc); + +cleanup: + object_unref(OBJECT(sioc)); +} + +static gboolean socket_reconnect_timeout(gpointer opaque) +{ + Chardev *chr = CHARDEV(opaque); + SocketChardev *s = SOCKET_CHARDEV(opaque); + QIOChannelSocket *sioc; + + s->reconnect_timer = 0; + + if (chr->be_open) { + return false; + } + + sioc = qio_channel_socket_new(); + tcp_chr_set_client_ioc_name(chr, sioc); + qio_channel_socket_connect_async(sioc, s->addr, + qemu_chr_socket_connected, + chr, NULL); + + return false; +} + +static void qmp_chardev_open_socket(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ + SocketChardev *s = SOCKET_CHARDEV(chr); + ChardevSocket *sock = backend->u.socket.data; + 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; + QIOChannelSocket *sioc = NULL; + + s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX; + s->is_listen = is_listen; + s->is_telnet = is_telnet; + s->do_nodelay = do_nodelay; + if (sock->tls_creds) { + Object *creds; + creds = object_resolve_path_component( + object_get_objects_root(), sock->tls_creds); + if (!creds) { + error_setg(errp, "No TLS credentials with id '%s'", + sock->tls_creds); + goto error; + } + s->tls_creds = (QCryptoTLSCreds *) + object_dynamic_cast(creds, + TYPE_QCRYPTO_TLS_CREDS); + if (!s->tls_creds) { + error_setg(errp, "Object with id '%s' is not TLS credentials", + sock->tls_creds); + goto error; + } + object_ref(OBJECT(s->tls_creds)); + if (is_listen) { + if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { + error_setg(errp, "%s", + "Expected TLS credentials for server endpoint"); + goto error; + } + } else { + if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { + error_setg(errp, "%s", + "Expected TLS credentials for client endpoint"); + goto error; + } + } + } + + s->addr = QAPI_CLONE(SocketAddress, sock->addr); + + qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); + if (s->is_unix) { + qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); + } + + /* be isn't opened until we get a connection */ + *be_opened = false; + + chr->filename = SocketAddress_to_str("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) { + sioc = qio_channel_socket_new(); + tcp_chr_set_client_ioc_name(chr, sioc); + qio_channel_socket_connect_async(sioc, s->addr, + qemu_chr_socket_connected, + chr, NULL); + } else { + if (s->is_listen) { + char *name; + sioc = qio_channel_socket_new(); + + name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); + qio_channel_set_name(QIO_CHANNEL(sioc), name); + g_free(name); + + if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) { + goto error; + } + s->listen_ioc = sioc; + if (is_waitconnect && + qemu_chr_wait_connected(chr, errp) < 0) { + return; + } + if (!s->ioc) { + s->listen_tag = qio_channel_add_watch( + QIO_CHANNEL(s->listen_ioc), G_IO_IN, + tcp_chr_accept, chr, NULL); + } + } else if (qemu_chr_wait_connected(chr, errp) < 0) { + goto error; + } + } + + return; + +error: + if (sioc) { + object_unref(OBJECT(sioc)); + } +} + +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"); + const char *tls_creds = qemu_opt_get(opts, "tls-creds"); + SocketAddress *addr; + ChardevSocket *sock; + + backend->type = CHARDEV_BACKEND_KIND_SOCKET; + if (!path) { + if (!host) { + error_setg(errp, "chardev: socket: no host given"); + return; + } + if (!port) { + error_setg(errp, "chardev: socket: no port given"); + return; + } + } else { + if (tls_creds) { + error_setg(errp, "TLS can only be used over TCP socket"); + return; + } + } + + sock = backend->u.socket.data = g_new0(ChardevSocket, 1); + qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); + + sock->has_nodelay = true; + sock->nodelay = do_nodelay; + sock->has_server = true; + sock->server = is_listen; + sock->has_telnet = true; + sock->telnet = is_telnet; + sock->has_wait = true; + sock->wait = is_waitconnect; + sock->has_reconnect = true; + sock->reconnect = reconnect; + sock->tls_creds = g_strdup(tls_creds); + + addr = g_new0(SocketAddress, 1); + if (path) { + UnixSocketAddress *q_unix; + addr->type = SOCKET_ADDRESS_KIND_UNIX; + q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); + q_unix->path = g_strdup(path); + } else { + addr->type = SOCKET_ADDRESS_KIND_INET; + addr->u.inet.data = g_new(InetSocketAddress, 1); + *addr->u.inet.data = (InetSocketAddress) { + .host = g_strdup(host), + .port = g_strdup(port), + .has_to = qemu_opt_get(opts, "to"), + .to = qemu_opt_get_number(opts, "to", 0), + .has_ipv4 = qemu_opt_get(opts, "ipv4"), + .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), + .has_ipv6 = qemu_opt_get(opts, "ipv6"), + .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), + }; + } + sock->addr = addr; +} + +static void char_socket_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc = CHARDEV_CLASS(oc); + + cc->parse = qemu_chr_parse_socket; + cc->open = qmp_chardev_open_socket; + cc->chr_wait_connected = tcp_chr_wait_connected; + cc->chr_write = tcp_chr_write; + cc->chr_sync_read = tcp_chr_sync_read; + cc->chr_disconnect = tcp_chr_disconnect; + cc->get_msgfds = tcp_get_msgfds; + cc->set_msgfds = tcp_set_msgfds; + cc->chr_add_client = tcp_chr_add_client; + cc->chr_add_watch = tcp_chr_add_watch; + cc->chr_update_read_handler = tcp_chr_update_read_handler; +} + +static const TypeInfo char_socket_type_info = { + .name = TYPE_CHARDEV_SOCKET, + .parent = TYPE_CHARDEV, + .instance_size = sizeof(SocketChardev), + .instance_finalize = char_socket_finalize, + .class_init = char_socket_class_init, +}; + +static void register_types(void) +{ + type_register_static(&char_socket_type_info); +} + +type_init(register_types); |