1 #include "qemu/osdep.h"
3 #include "qapi/error.h"
4 #include "qemu/sockets.h"
5 #include "qga/channel.h"
11 #define GA_CHANNEL_BAUDRATE_DEFAULT B38400 /* for isa-serial channels */
14 GIOChannel *listen_channel;
15 GIOChannel *client_channel;
16 GAChannelMethod method;
17 GAChannelCallback event_cb;
21 static int ga_channel_client_add(GAChannel *c, int fd);
23 static gboolean ga_channel_listen_accept(GIOChannel *channel,
24 GIOCondition condition, gpointer data)
28 bool accepted = false;
30 g_assert(channel != NULL);
32 client_fd = qemu_accept(g_io_channel_unix_get_fd(channel), NULL, NULL);
33 if (client_fd == -1) {
34 g_warning("error converting fd to gsocket: %s", strerror(errno));
37 qemu_set_nonblock(client_fd);
38 ret = ga_channel_client_add(c, client_fd);
40 g_warning("error setting up connection");
47 /* only accept 1 connection at a time */
51 /* start polling for readable events on listen fd, new==true
52 * indicates we should use the existing s->listen_channel
54 static void ga_channel_listen_add(GAChannel *c, int listen_fd, bool create)
57 c->listen_channel = g_io_channel_unix_new(listen_fd);
59 g_io_add_watch(c->listen_channel, G_IO_IN, ga_channel_listen_accept, c);
62 static void ga_channel_listen_close(GAChannel *c)
64 g_assert(c->listen_channel);
65 g_io_channel_shutdown(c->listen_channel, true, NULL);
66 g_io_channel_unref(c->listen_channel);
67 c->listen_channel = NULL;
70 /* cleanup state for closed connection/session, start accepting new
71 * connections if we're in listening mode
73 static void ga_channel_client_close(GAChannel *c)
75 g_assert(c->client_channel);
76 g_io_channel_shutdown(c->client_channel, true, NULL);
77 g_io_channel_unref(c->client_channel);
78 c->client_channel = NULL;
79 if (c->listen_channel) {
80 ga_channel_listen_add(c, 0, false);
84 static gboolean ga_channel_client_event(GIOChannel *channel,
85 GIOCondition condition, gpointer data)
92 client_cont = c->event_cb(condition, c->user_data);
94 ga_channel_client_close(c);
101 static int ga_channel_client_add(GAChannel *c, int fd)
103 GIOChannel *client_channel;
106 g_assert(c && !c->client_channel);
107 client_channel = g_io_channel_unix_new(fd);
108 g_assert(client_channel);
109 g_io_channel_set_encoding(client_channel, NULL, &err);
111 g_warning("error setting channel encoding to binary");
115 g_io_add_watch(client_channel, G_IO_IN | G_IO_HUP,
116 ga_channel_client_event, c);
117 c->client_channel = client_channel;
121 static gboolean ga_channel_open(GAChannel *c, const gchar *path, GAChannelMethod method)
127 case GA_CHANNEL_VIRTIO_SERIAL: {
128 int fd = qemu_open(path, O_RDWR | O_NONBLOCK
129 #ifndef CONFIG_SOLARIS
134 g_critical("error opening channel: %s", strerror(errno));
137 #ifdef CONFIG_SOLARIS
138 ret = ioctl(fd, I_SETSIG, S_OUTPUT | S_INPUT | S_HIPRI);
140 g_critical("error setting event mask for channel: %s",
146 ret = ga_channel_client_add(c, fd);
148 g_critical("error adding channel to main loop");
154 case GA_CHANNEL_ISA_SERIAL: {
156 int fd = qemu_open(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
158 g_critical("error opening channel: %s", strerror(errno));
162 /* set up serial port for non-canonical, dumb byte streaming */
163 tio.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
164 INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY |
168 tio.c_cflag |= GA_CHANNEL_BAUDRATE_DEFAULT;
169 /* 1 available byte min or reads will block (we'll set non-blocking
170 * elsewhere, else we have to deal with read()=0 instead)
174 /* flush everything waiting for read/xmit, it's garbage at this point */
175 tcflush(fd, TCIFLUSH);
176 tcsetattr(fd, TCSANOW, &tio);
177 ret = ga_channel_client_add(c, fd);
179 g_critical("error adding channel to main loop");
185 case GA_CHANNEL_UNIX_LISTEN: {
186 Error *local_err = NULL;
187 int fd = unix_listen(path, NULL, strlen(path), &local_err);
188 if (local_err != NULL) {
189 g_critical("%s", error_get_pretty(local_err));
190 error_free(local_err);
193 ga_channel_listen_add(c, fd, true);
196 case GA_CHANNEL_VSOCK_LISTEN: {
197 Error *local_err = NULL;
202 addr_str = g_strdup_printf("vsock:%s", path);
203 addr = socket_parse(addr_str, &local_err);
205 if (local_err != NULL) {
206 g_critical("%s", error_get_pretty(local_err));
207 error_free(local_err);
211 fd = socket_listen(addr, &local_err);
212 qapi_free_SocketAddress(addr);
213 if (local_err != NULL) {
214 g_critical("%s", error_get_pretty(local_err));
215 error_free(local_err);
218 ga_channel_listen_add(c, fd, true);
222 g_critical("error binding/listening to specified socket");
229 GIOStatus ga_channel_write_all(GAChannel *c, const gchar *buf, gsize size)
233 GIOStatus status = G_IO_STATUS_NORMAL;
236 g_debug("sending data, count: %d", (int)size);
237 status = g_io_channel_write_chars(c->client_channel, buf, size,
239 if (status == G_IO_STATUS_NORMAL) {
242 } else if (status != G_IO_STATUS_AGAIN) {
243 g_warning("error writing to channel: %s", err->message);
249 status = g_io_channel_flush(c->client_channel, &err);
250 } while (status == G_IO_STATUS_AGAIN);
252 if (status != G_IO_STATUS_NORMAL) {
253 g_warning("error flushing channel: %s", err->message);
259 GIOStatus ga_channel_read(GAChannel *c, gchar *buf, gsize size, gsize *count)
261 return g_io_channel_read_chars(c->client_channel, buf, size, count, NULL);
264 GAChannel *ga_channel_new(GAChannelMethod method, const gchar *path,
265 GAChannelCallback cb, gpointer opaque)
267 GAChannel *c = g_new0(GAChannel, 1);
269 c->user_data = opaque;
271 if (!ga_channel_open(c, path, method)) {
272 g_critical("error opening channel");
280 void ga_channel_free(GAChannel *c)
282 if (c->listen_channel) {
283 ga_channel_listen_close(c);
285 if (c->client_channel) {
286 ga_channel_client_close(c);