/* * 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 "chardev/char.h" #include "io/channel-socket.h" #include "io/channel-tls.h" #include "io/net-listener.h" #include "qemu/error-report.h" #include "qemu/option.h" #include "qapi/error.h" #include "qapi/clone-visitor.h" #include "qapi/qapi-visit-sockets.h" #include "chardev/char-io.h" /***********************************************************/ /* TCP Net console */ #define TCP_MAX_FDS 16 typedef struct { char buf[21]; size_t buflen; } TCPChardevTelnetInit; typedef struct { Chardev parent; QIOChannel *ioc; /* Client I/O channel */ QIOChannelSocket *sioc; /* Client master channel */ QIONetListener *listener; GSource *hup_source; QCryptoTLSCreds *tls_creds; int connected; int max_size; int do_telnetopt; int do_nodelay; int *read_msgfds; size_t read_msgfds_num; int *write_msgfds; size_t write_msgfds_num; SocketAddress *addr; bool is_listen; bool is_telnet; bool is_tn3270; GSource *telnet_source; TCPChardevTelnetInit *telnet_init; GSource *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 tcp_chr_telnet_init(Chardev *chr); static void tcp_chr_reconn_timer_cancel(SocketChardev *s) { if (s->reconnect_timer) { g_source_destroy(s->reconnect_timer); g_source_unref(s->reconnect_timer); s->reconnect_timer = NULL; } } static void qemu_chr_socket_restart_timer(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); char *name; assert(s->connected == 0); name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); s->reconnect_timer = qemu_chr_timeout_add_ms(chr, s->reconnect_time * 1000, socket_reconnect_timeout, chr); g_source_set_name(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 void tcp_chr_accept(QIONetListener *listener, QIOChannelSocket *cioc, void *opaque); static int tcp_chr_read_poll(void *opaque); static void tcp_chr_disconnect(Chardev *chr); /* 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; } if (ret < 0 && errno != EAGAIN) { if (tcp_chr_read_poll(chr) <= 0) { tcp_chr_disconnect(chr); return len; } /* else let the read handler finish it properly */ } 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; } static void tcp_chr_process_IAC_bytes(Chardev *chr, SocketChardev *s, uint8_t *buf, int *size) { /* Handle any telnet or tn3270 client's basic IAC options. * For telnet options, it satisfies char by char mode with no echo. * For tn3270 options, it satisfies binary mode with EOR. * All IAC options will be removed from the buf and the do_opt * pointer will be used to track the state of the width of the * IAC information. * * RFC854: "All TELNET commands consist of at least a two byte sequence. * The commands dealing with option negotiation are three byte sequences, * the third byte being the code for the option referenced." * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes. * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary * for tn3270. * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270 * session, and NOP and IP need to be done later. */ 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++; } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR || (unsigned char)buf[i] == IAC_SB || (unsigned char)buf[i] == IAC_SE) && s->do_telnetopt == 2) { buf[j++] = IAC; buf[j++] = buf[i]; s->do_telnetopt++; } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP || (unsigned char)buf[i] == IAC_NOP) && s->do_telnetopt == 2) { /* TODO: IP and NOP need to be implemented later. */ 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->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; } if (s->hup_source != NULL) { g_source_destroy(s->hup_source); g_source_unref(s->hup_source); s->hup_source = NULL; } 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_TYPE_INET: return g_strdup_printf("%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_TYPE_UNIX: return g_strdup_printf("%sunix:%s%s", prefix, addr->u.q_unix.path, is_listen ? ",server" : ""); break; case SOCKET_ADDRESS_TYPE_FD: return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.str, is_listen ? ",server" : ""); break; case SOCKET_ADDRESS_TYPE_VSOCK: return g_strdup_printf("%svsock:%s:%s", prefix, addr->u.vsock.cid, addr->u.vsock.port); default: abort(); } } static void update_disconnected_filename(SocketChardev *s) { Chardev *chr = CHARDEV(s); g_free(chr->filename); chr->filename = SocketAddress_to_str("disconnected:", s->addr, s->is_listen, s->is_telnet); } /* NB may be called even if tcp_chr_connect has not been * reached, due to TLS or telnet initialization failure, * so can *not* assume s->connected == true */ static void tcp_chr_disconnect(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); bool emit_close = s->connected; tcp_chr_free_connection(chr); if (s->listener) { qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, chr, NULL, chr->gcontext); } update_disconnected_filename(s); if (emit_close) { 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 && errno != EAGAIN)) { /* 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 gboolean tcp_chr_hup(QIOChannel *channel, GIOCondition cond, void *opaque) { Chardev *chr = CHARDEV(opaque); tcp_chr_disconnect(chr); return G_SOURCE_REMOVE; } 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; } qio_channel_set_blocking(s->ioc, true, NULL); size = tcp_chr_recv(chr, (void *) buf, len); qio_channel_set_blocking(s->ioc, false, NULL); 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->gsource = io_add_watch_poll(chr, s->ioc, tcp_chr_read_poll, tcp_chr_read, chr, chr->gcontext); } s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, chr, NULL); g_source_attach(s->hup_source, chr->gcontext); qemu_chr_be_event(chr, CHR_EVENT_OPENED); } static void tcp_chr_telnet_destroy(SocketChardev *s) { if (s->telnet_source) { g_source_destroy(s->telnet_source); g_source_unref(s->telnet_source); s->telnet_source = NULL; } } static void tcp_chr_update_read_handler(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); if (s->listener) { /* * It's possible that chardev context is changed in * qemu_chr_be_update_read_handlers(). Reset it for QIO net * listener if there is. */ qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, chr, NULL, chr->gcontext); } if (s->telnet_source) { tcp_chr_telnet_init(CHARDEV(s)); } if (!s->connected) { return; } remove_fd_in_watch(chr); if (s->ioc) { chr->gsource = io_add_watch_poll(chr, s->ioc, tcp_chr_read_poll, tcp_chr_read, chr, chr->gcontext); } } static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, GIOCondition cond G_GNUC_UNUSED, gpointer user_data) { SocketChardev *s = user_data; Chardev *chr = CHARDEV(s); TCPChardevTelnetInit *init = s->telnet_init; ssize_t ret; assert(init); 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(chr); goto end; } } init->buflen -= ret; if (init->buflen == 0) { tcp_chr_connect(chr); goto end; } memmove(init->buf, init->buf + ret, init->buflen); return G_SOURCE_CONTINUE; end: g_free(s->telnet_init); s->telnet_init = NULL; g_source_unref(s->telnet_source); s->telnet_source = NULL; return G_SOURCE_REMOVE; } static void tcp_chr_telnet_init(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); TCPChardevTelnetInit *init; size_t n = 0; /* Destroy existing task */ tcp_chr_telnet_destroy(s); if (s->telnet_init) { /* We are possibly during a handshake already */ goto cont; } s->telnet_init = g_new0(TCPChardevTelnetInit, 1); init = s->telnet_init; #define IACSET(x, a, b, c) \ do { \ x[n++] = a; \ x[n++] = b; \ x[n++] = c; \ } while (0) if (!s->is_tn3270) { init->buflen = 12; /* 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 */ } else { init->buflen = 21; /* Prep the TN3270 negotion based on RFC1576 */ IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ } #undef IACSET cont: s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, tcp_chr_telnet_init_io, s, NULL, chr->gcontext); } 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.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, chr->gcontext); } 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->listener) { qio_net_listener_set_client_func_full(s->listener, NULL, NULL, NULL, chr->gcontext); } 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 void tcp_chr_accept(QIONetListener *listener, QIOChannelSocket *cioc, void *opaque) { Chardev *chr = CHARDEV(opaque); tcp_chr_set_client_ioc_name(chr, cioc); tcp_chr_new_client(chr, cioc); } 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) { info_report("QEMU waiting for connection on: %s", chr->filename); sioc = qio_net_listener_wait_client(s->listener); tcp_chr_set_client_ioc_name(chr, sioc); tcp_chr_new_client(chr, sioc); object_unref(OBJECT(sioc)); } 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); tcp_chr_reconn_timer_cancel(s); qapi_free_SocketAddress(s->addr); tcp_chr_telnet_destroy(s); g_free(s->telnet_init); if (s->listener) { qio_net_listener_set_client_func_full(s->listener, NULL, NULL, NULL, chr->gcontext); object_unref(OBJECT(s->listener)); } 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 void tcp_chr_connect_async(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); QIOChannelSocket *sioc; 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, chr->gcontext); } static gboolean socket_reconnect_timeout(gpointer opaque) { Chardev *chr = CHARDEV(opaque); SocketChardev *s = SOCKET_CHARDEV(opaque); g_source_unref(s->reconnect_timer); s->reconnect_timer = NULL; if (chr->be_open) { return false; } tcp_chr_connect_async(chr); 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; 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_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; bool is_waitconnect = sock->has_wait ? sock->wait : false; int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; QIOChannelSocket *sioc = NULL; SocketAddress *addr; s->is_listen = is_listen; s->is_telnet = is_telnet; s->is_tn3270 = is_tn3270; 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 = addr = socket_address_flatten(sock->addr); qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); } /* be isn't opened until we get a connection */ *be_opened = false; update_disconnected_filename(s); if (is_listen) { if (is_telnet || is_tn3270) { s->do_telnetopt = 1; } } else if (reconnect > 0) { s->reconnect_time = reconnect; } /* If reconnect_time is set, will do that in chr_machine_done. */ if (!s->reconnect_time) { if (s->is_listen) { char *name; s->listener = qio_net_listener_new(); name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); qio_net_listener_set_name(s->listener, name); g_free(name); if (qio_net_listener_open_sync(s->listener, s->addr, errp) < 0) { object_unref(OBJECT(s->listener)); s->listener = NULL; goto error; } qapi_free_SocketAddress(s->addr); s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); update_disconnected_filename(s); if (is_waitconnect && qemu_chr_wait_connected(chr, errp) < 0) { return; } if (!s->ioc) { qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, chr, NULL, chr->gcontext); } } 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 is_tn3270 = qemu_opt_get_bool(opts, "tn3270", 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 *fd = qemu_opt_get(opts, "fd"); const char *tls_creds = qemu_opt_get(opts, "tls-creds"); SocketAddressLegacy *addr; ChardevSocket *sock; if ((!!path + !!fd + !!host) != 1) { error_setg(errp, "Exactly one of 'path', 'fd' or 'host' required"); return; } backend->type = CHARDEV_BACKEND_KIND_SOCKET; if (path) { if (tls_creds) { error_setg(errp, "TLS can only be used over TCP socket"); return; } } else if (host) { if (!port) { error_setg(errp, "chardev: socket: no port given"); return; } } else if (fd) { /* We don't know what host to validate against when in client mode */ if (tls_creds && !is_listen) { error_setg(errp, "TLS can not be used with pre-opened client FD"); return; } } else { g_assert_not_reached(); } 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_tn3270 = true; sock->tn3270 = is_tn3270; 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(SocketAddressLegacy, 1); if (path) { UnixSocketAddress *q_unix; addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); q_unix->path = g_strdup(path); } else if (host) { addr->type = SOCKET_ADDRESS_LEGACY_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), }; } else if (fd) { addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD; addr->u.fd.data = g_new(String, 1); addr->u.fd.data->str = g_strdup(fd); } else { g_assert_not_reached(); } sock->addr = addr; } static void char_socket_get_addr(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { SocketChardev *s = SOCKET_CHARDEV(obj); visit_type_SocketAddress(v, name, &s->addr, errp); } static bool char_socket_get_connected(Object *obj, Error **errp) { SocketChardev *s = SOCKET_CHARDEV(obj); return s->connected; } static int tcp_chr_machine_done_hook(Chardev *chr) { SocketChardev *s = SOCKET_CHARDEV(chr); if (s->reconnect_time) { tcp_chr_connect_async(chr); } return 0; } 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; cc->chr_machine_done = tcp_chr_machine_done_hook; object_class_property_add(oc, "addr", "SocketAddress", char_socket_get_addr, NULL, NULL, NULL, &error_abort); object_class_property_add_bool(oc, "connected", char_socket_get_connected, NULL, &error_abort); } 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);