1 #include "qemu/osdep.h"
3 #include "qapi/error.h"
4 #include "qemu/sockets.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,
122 GAChannelMethod method, int fd)
128 case GA_CHANNEL_VIRTIO_SERIAL: {
130 fd = qemu_open_old(path, O_RDWR | O_NONBLOCK
131 #ifndef CONFIG_SOLARIS
136 g_critical("error opening channel: %s", strerror(errno));
139 #ifdef CONFIG_SOLARIS
140 ret = ioctl(fd, I_SETSIG, S_OUTPUT | S_INPUT | S_HIPRI);
142 g_critical("error setting event mask for channel: %s",
148 ret = ga_channel_client_add(c, fd);
150 g_critical("error adding channel to main loop");
156 case GA_CHANNEL_ISA_SERIAL: {
160 fd = qemu_open_old(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
162 g_critical("error opening channel: %s", strerror(errno));
166 /* set up serial port for non-canonical, dumb byte streaming */
167 tio.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
168 INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY |
172 tio.c_cflag |= GA_CHANNEL_BAUDRATE_DEFAULT;
173 /* 1 available byte min or reads will block (we'll set non-blocking
174 * elsewhere, else we have to deal with read()=0 instead)
178 /* flush everything waiting for read/xmit, it's garbage at this point */
179 tcflush(fd, TCIFLUSH);
180 tcsetattr(fd, TCSANOW, &tio);
181 ret = ga_channel_client_add(c, fd);
183 g_critical("error adding channel to main loop");
189 case GA_CHANNEL_UNIX_LISTEN: {
191 Error *local_err = NULL;
193 fd = unix_listen(path, &local_err);
194 if (local_err != NULL) {
195 g_critical("%s", error_get_pretty(local_err));
196 error_free(local_err);
200 ga_channel_listen_add(c, fd, true);
203 case GA_CHANNEL_VSOCK_LISTEN: {
205 Error *local_err = NULL;
209 addr_str = g_strdup_printf("vsock:%s", path);
210 addr = socket_parse(addr_str, &local_err);
212 if (local_err != NULL) {
213 g_critical("%s", error_get_pretty(local_err));
214 error_free(local_err);
218 fd = socket_listen(addr, 1, &local_err);
219 qapi_free_SocketAddress(addr);
220 if (local_err != NULL) {
221 g_critical("%s", error_get_pretty(local_err));
222 error_free(local_err);
226 ga_channel_listen_add(c, fd, true);
230 g_critical("error binding/listening to specified socket");
237 GIOStatus ga_channel_write_all(GAChannel *c, const gchar *buf, gsize size)
241 GIOStatus status = G_IO_STATUS_NORMAL;
244 g_debug("sending data, count: %d", (int)size);
245 status = g_io_channel_write_chars(c->client_channel, buf, size,
247 if (status == G_IO_STATUS_NORMAL) {
250 } else if (status != G_IO_STATUS_AGAIN) {
251 g_warning("error writing to channel: %s", err->message);
257 status = g_io_channel_flush(c->client_channel, &err);
258 } while (status == G_IO_STATUS_AGAIN);
260 if (status != G_IO_STATUS_NORMAL) {
261 g_warning("error flushing channel: %s", err->message);
267 GIOStatus ga_channel_read(GAChannel *c, gchar *buf, gsize size, gsize *count)
269 return g_io_channel_read_chars(c->client_channel, buf, size, count, NULL);
272 GAChannel *ga_channel_new(GAChannelMethod method, const gchar *path,
273 int listen_fd, GAChannelCallback cb, gpointer opaque)
275 GAChannel *c = g_new0(GAChannel, 1);
277 c->user_data = opaque;
279 if (!ga_channel_open(c, path, method, listen_fd)) {
280 g_critical("error opening channel");
288 void ga_channel_free(GAChannel *c)
290 if (c->listen_channel) {
291 ga_channel_listen_close(c);
293 if (c->client_channel) {
294 ga_channel_client_close(c);