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-rw-r--r--qemu/io/channel-websock.c964
1 files changed, 964 insertions, 0 deletions
diff --git a/qemu/io/channel-websock.c b/qemu/io/channel-websock.c
new file mode 100644
index 000000000..708178779
--- /dev/null
+++ b/qemu/io/channel-websock.c
@@ -0,0 +1,964 @@
+/*
+ * QEMU I/O channels driver websockets
+ *
+ * Copyright (c) 2015 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "io/channel-websock.h"
+#include "crypto/hash.h"
+#include "trace.h"
+
+
+/* Max amount to allow in rawinput/rawoutput buffers */
+#define QIO_CHANNEL_WEBSOCK_MAX_BUFFER 8192
+
+#define QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN 24
+#define QIO_CHANNEL_WEBSOCK_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+#define QIO_CHANNEL_WEBSOCK_GUID_LEN strlen(QIO_CHANNEL_WEBSOCK_GUID)
+
+#define QIO_CHANNEL_WEBSOCK_HEADER_PROTOCOL "Sec-WebSocket-Protocol"
+#define QIO_CHANNEL_WEBSOCK_HEADER_VERSION "Sec-WebSocket-Version"
+#define QIO_CHANNEL_WEBSOCK_HEADER_KEY "Sec-WebSocket-Key"
+
+#define QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY "binary"
+
+#define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RESPONSE \
+ "HTTP/1.1 101 Switching Protocols\r\n" \
+ "Upgrade: websocket\r\n" \
+ "Connection: Upgrade\r\n" \
+ "Sec-WebSocket-Accept: %s\r\n" \
+ "Sec-WebSocket-Protocol: binary\r\n" \
+ "\r\n"
+#define QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM "\r\n"
+#define QIO_CHANNEL_WEBSOCK_HANDSHAKE_END "\r\n\r\n"
+#define QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION "13"
+
+/* The websockets packet header is variable length
+ * depending on the size of the payload... */
+
+/* ...length when using 7-bit payload length */
+#define QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT 6
+/* ...length when using 16-bit payload length */
+#define QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT 8
+/* ...length when using 64-bit payload length */
+#define QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT 14
+
+/* Length of the optional data mask field in header */
+#define QIO_CHANNEL_WEBSOCK_HEADER_LEN_MASK 4
+
+/* Maximum length that can fit in 7-bit payload size */
+#define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_7_BIT 126
+/* Maximum length that can fit in 16-bit payload size */
+#define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_16_BIT 65536
+
+/* Magic 7-bit length to indicate use of 16-bit payload length */
+#define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT 126
+/* Magic 7-bit length to indicate use of 64-bit payload length */
+#define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT 127
+
+/* Bitmasks & shifts for accessing header fields */
+#define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_FIN 0x80
+#define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE 0x0f
+#define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_HAS_MASK 0x80
+#define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_PAYLOAD_LEN 0x7f
+#define QIO_CHANNEL_WEBSOCK_HEADER_SHIFT_FIN 7
+#define QIO_CHANNEL_WEBSOCK_HEADER_SHIFT_HAS_MASK 7
+
+typedef struct QIOChannelWebsockHeader QIOChannelWebsockHeader;
+
+struct QEMU_PACKED QIOChannelWebsockHeader {
+ unsigned char b0;
+ unsigned char b1;
+ union {
+ struct QEMU_PACKED {
+ uint16_t l16;
+ QIOChannelWebsockMask m16;
+ } s16;
+ struct QEMU_PACKED {
+ uint64_t l64;
+ QIOChannelWebsockMask m64;
+ } s64;
+ QIOChannelWebsockMask m;
+ } u;
+};
+
+enum {
+ QIO_CHANNEL_WEBSOCK_OPCODE_CONTINUATION = 0x0,
+ QIO_CHANNEL_WEBSOCK_OPCODE_TEXT_FRAME = 0x1,
+ QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME = 0x2,
+ QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE = 0x8,
+ QIO_CHANNEL_WEBSOCK_OPCODE_PING = 0x9,
+ QIO_CHANNEL_WEBSOCK_OPCODE_PONG = 0xA
+};
+
+static char *qio_channel_websock_handshake_entry(const char *handshake,
+ size_t handshake_len,
+ const char *name)
+{
+ char *begin, *end, *ret = NULL;
+ char *line = g_strdup_printf("%s%s: ",
+ QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM,
+ name);
+ begin = g_strstr_len(handshake, handshake_len, line);
+ if (begin != NULL) {
+ begin += strlen(line);
+ end = g_strstr_len(begin, handshake_len - (begin - handshake),
+ QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM);
+ if (end != NULL) {
+ ret = g_strndup(begin, end - begin);
+ }
+ }
+ g_free(line);
+ return ret;
+}
+
+
+static int qio_channel_websock_handshake_send_response(QIOChannelWebsock *ioc,
+ const char *key,
+ Error **errp)
+{
+ char combined_key[QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN +
+ QIO_CHANNEL_WEBSOCK_GUID_LEN + 1];
+ char *accept = NULL, *response = NULL;
+ size_t responselen;
+
+ g_strlcpy(combined_key, key, QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN + 1);
+ g_strlcat(combined_key, QIO_CHANNEL_WEBSOCK_GUID,
+ QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN +
+ QIO_CHANNEL_WEBSOCK_GUID_LEN + 1);
+
+ /* hash and encode it */
+ if (qcrypto_hash_base64(QCRYPTO_HASH_ALG_SHA1,
+ combined_key,
+ QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN +
+ QIO_CHANNEL_WEBSOCK_GUID_LEN,
+ &accept,
+ errp) < 0) {
+ return -1;
+ }
+
+ response = g_strdup_printf(QIO_CHANNEL_WEBSOCK_HANDSHAKE_RESPONSE, accept);
+ responselen = strlen(response);
+ buffer_reserve(&ioc->encoutput, responselen);
+ buffer_append(&ioc->encoutput, response, responselen);
+
+ g_free(accept);
+ g_free(response);
+
+ return 0;
+}
+
+static int qio_channel_websock_handshake_process(QIOChannelWebsock *ioc,
+ const char *line,
+ size_t size,
+ Error **errp)
+{
+ int ret = -1;
+ char *protocols = qio_channel_websock_handshake_entry(
+ line, size, QIO_CHANNEL_WEBSOCK_HEADER_PROTOCOL);
+ char *version = qio_channel_websock_handshake_entry(
+ line, size, QIO_CHANNEL_WEBSOCK_HEADER_VERSION);
+ char *key = qio_channel_websock_handshake_entry(
+ line, size, QIO_CHANNEL_WEBSOCK_HEADER_KEY);
+
+ if (!protocols) {
+ error_setg(errp, "Missing websocket protocol header data");
+ goto cleanup;
+ }
+
+ if (!version) {
+ error_setg(errp, "Missing websocket version header data");
+ goto cleanup;
+ }
+
+ if (!key) {
+ error_setg(errp, "Missing websocket key header data");
+ goto cleanup;
+ }
+
+ if (!g_strrstr(protocols, QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY)) {
+ error_setg(errp, "No '%s' protocol is supported by client '%s'",
+ QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY, protocols);
+ goto cleanup;
+ }
+
+ if (!g_str_equal(version, QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION)) {
+ error_setg(errp, "Version '%s' is not supported by client '%s'",
+ QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION, version);
+ goto cleanup;
+ }
+
+ if (strlen(key) != QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN) {
+ error_setg(errp, "Key length '%zu' was not as expected '%d'",
+ strlen(key), QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN);
+ goto cleanup;
+ }
+
+ ret = qio_channel_websock_handshake_send_response(ioc, key, errp);
+
+ cleanup:
+ g_free(protocols);
+ g_free(version);
+ g_free(key);
+ return ret;
+}
+
+static int qio_channel_websock_handshake_read(QIOChannelWebsock *ioc,
+ Error **errp)
+{
+ char *handshake_end;
+ ssize_t ret;
+ /* Typical HTTP headers from novnc are 512 bytes, so limiting
+ * total header size to 4096 is easily enough. */
+ size_t want = 4096 - ioc->encinput.offset;
+ buffer_reserve(&ioc->encinput, want);
+ ret = qio_channel_read(ioc->master,
+ (char *)buffer_end(&ioc->encinput), want, errp);
+ if (ret < 0) {
+ return -1;
+ }
+ ioc->encinput.offset += ret;
+
+ handshake_end = g_strstr_len((char *)ioc->encinput.buffer,
+ ioc->encinput.offset,
+ QIO_CHANNEL_WEBSOCK_HANDSHAKE_END);
+ if (!handshake_end) {
+ if (ioc->encinput.offset >= 4096) {
+ error_setg(errp,
+ "End of headers not found in first 4096 bytes");
+ return -1;
+ } else {
+ return 0;
+ }
+ }
+
+ if (qio_channel_websock_handshake_process(ioc,
+ (char *)ioc->encinput.buffer,
+ ioc->encinput.offset,
+ errp) < 0) {
+ return -1;
+ }
+
+ buffer_advance(&ioc->encinput,
+ handshake_end - (char *)ioc->encinput.buffer +
+ strlen(QIO_CHANNEL_WEBSOCK_HANDSHAKE_END));
+ return 1;
+}
+
+static gboolean qio_channel_websock_handshake_send(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer user_data)
+{
+ QIOTask *task = user_data;
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(
+ qio_task_get_source(task));
+ Error *err = NULL;
+ ssize_t ret;
+
+ ret = qio_channel_write(wioc->master,
+ (char *)wioc->encoutput.buffer,
+ wioc->encoutput.offset,
+ &err);
+
+ if (ret < 0) {
+ trace_qio_channel_websock_handshake_fail(ioc);
+ qio_task_abort(task, err);
+ error_free(err);
+ return FALSE;
+ }
+
+ buffer_advance(&wioc->encoutput, ret);
+ if (wioc->encoutput.offset == 0) {
+ trace_qio_channel_websock_handshake_complete(ioc);
+ qio_task_complete(task);
+ return FALSE;
+ }
+ trace_qio_channel_websock_handshake_pending(ioc, G_IO_OUT);
+ return TRUE;
+}
+
+static gboolean qio_channel_websock_handshake_io(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer user_data)
+{
+ QIOTask *task = user_data;
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(
+ qio_task_get_source(task));
+ Error *err = NULL;
+ int ret;
+
+ ret = qio_channel_websock_handshake_read(wioc, &err);
+ if (ret < 0) {
+ trace_qio_channel_websock_handshake_fail(ioc);
+ qio_task_abort(task, err);
+ error_free(err);
+ return FALSE;
+ }
+ if (ret == 0) {
+ trace_qio_channel_websock_handshake_pending(ioc, G_IO_IN);
+ /* need more data still */
+ return TRUE;
+ }
+
+ object_ref(OBJECT(task));
+ trace_qio_channel_websock_handshake_reply(ioc);
+ qio_channel_add_watch(
+ wioc->master,
+ G_IO_OUT,
+ qio_channel_websock_handshake_send,
+ task,
+ (GDestroyNotify)object_unref);
+ return FALSE;
+}
+
+
+static void qio_channel_websock_encode(QIOChannelWebsock *ioc)
+{
+ size_t header_size;
+ union {
+ char buf[QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT];
+ QIOChannelWebsockHeader ws;
+ } header;
+
+ if (!ioc->rawoutput.offset) {
+ return;
+ }
+
+ header.ws.b0 = (1 << QIO_CHANNEL_WEBSOCK_HEADER_SHIFT_FIN) |
+ (QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME &
+ QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE);
+ if (ioc->rawoutput.offset <
+ QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_7_BIT) {
+ header.ws.b1 = (uint8_t)ioc->rawoutput.offset;
+ header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT;
+ } else if (ioc->rawoutput.offset <
+ QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_16_BIT) {
+ header.ws.b1 = QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT;
+ header.ws.u.s16.l16 = cpu_to_be16((uint16_t)ioc->rawoutput.offset);
+ header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT;
+ } else {
+ header.ws.b1 = QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT;
+ header.ws.u.s64.l64 = cpu_to_be64(ioc->rawoutput.offset);
+ header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT;
+ }
+ header_size -= QIO_CHANNEL_WEBSOCK_HEADER_LEN_MASK;
+
+ buffer_reserve(&ioc->encoutput, header_size + ioc->rawoutput.offset);
+ buffer_append(&ioc->encoutput, header.buf, header_size);
+ buffer_append(&ioc->encoutput, ioc->rawoutput.buffer,
+ ioc->rawoutput.offset);
+ buffer_reset(&ioc->rawoutput);
+}
+
+
+static ssize_t qio_channel_websock_decode_header(QIOChannelWebsock *ioc,
+ Error **errp)
+{
+ unsigned char opcode, fin, has_mask;
+ size_t header_size;
+ size_t payload_len;
+ QIOChannelWebsockHeader *header =
+ (QIOChannelWebsockHeader *)ioc->encinput.buffer;
+
+ if (ioc->payload_remain) {
+ error_setg(errp,
+ "Decoding header but %zu bytes of payload remain",
+ ioc->payload_remain);
+ return -1;
+ }
+ if (ioc->encinput.offset < QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT) {
+ /* header not complete */
+ return QIO_CHANNEL_ERR_BLOCK;
+ }
+
+ fin = (header->b0 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_FIN) >>
+ QIO_CHANNEL_WEBSOCK_HEADER_SHIFT_FIN;
+ opcode = header->b0 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE;
+ has_mask = (header->b1 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_HAS_MASK) >>
+ QIO_CHANNEL_WEBSOCK_HEADER_SHIFT_HAS_MASK;
+ payload_len = header->b1 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_PAYLOAD_LEN;
+
+ if (opcode == QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE) {
+ /* disconnect */
+ return 0;
+ }
+
+ /* Websocket frame sanity check:
+ * * Websocket fragmentation is not supported.
+ * * All websockets frames sent by a client have to be masked.
+ * * Only binary encoding is supported.
+ */
+ if (!fin) {
+ error_setg(errp, "websocket fragmentation is not supported");
+ return -1;
+ }
+ if (!has_mask) {
+ error_setg(errp, "websocket frames must be masked");
+ return -1;
+ }
+ if (opcode != QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME) {
+ error_setg(errp, "only binary websocket frames are supported");
+ return -1;
+ }
+
+ if (payload_len < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT) {
+ ioc->payload_remain = payload_len;
+ header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT;
+ ioc->mask = header->u.m;
+ } else if (payload_len == QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT &&
+ ioc->encinput.offset >= QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT) {
+ ioc->payload_remain = be16_to_cpu(header->u.s16.l16);
+ header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT;
+ ioc->mask = header->u.s16.m16;
+ } else if (payload_len == QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT &&
+ ioc->encinput.offset >= QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT) {
+ ioc->payload_remain = be64_to_cpu(header->u.s64.l64);
+ header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT;
+ ioc->mask = header->u.s64.m64;
+ } else {
+ /* header not complete */
+ return QIO_CHANNEL_ERR_BLOCK;
+ }
+
+ buffer_advance(&ioc->encinput, header_size);
+ return 1;
+}
+
+
+static ssize_t qio_channel_websock_decode_payload(QIOChannelWebsock *ioc,
+ Error **errp)
+{
+ size_t i;
+ size_t payload_len;
+ uint32_t *payload32;
+
+ if (!ioc->payload_remain) {
+ error_setg(errp,
+ "Decoding payload but no bytes of payload remain");
+ return -1;
+ }
+
+ /* If we aren't at the end of the payload, then drop
+ * off the last bytes, so we're always multiple of 4
+ * for purpose of unmasking, except at end of payload
+ */
+ if (ioc->encinput.offset < ioc->payload_remain) {
+ payload_len = ioc->encinput.offset - (ioc->encinput.offset % 4);
+ } else {
+ payload_len = ioc->payload_remain;
+ }
+ if (payload_len == 0) {
+ return QIO_CHANNEL_ERR_BLOCK;
+ }
+
+ ioc->payload_remain -= payload_len;
+
+ /* unmask frame */
+ /* process 1 frame (32 bit op) */
+ payload32 = (uint32_t *)ioc->encinput.buffer;
+ for (i = 0; i < payload_len / 4; i++) {
+ payload32[i] ^= ioc->mask.u;
+ }
+ /* process the remaining bytes (if any) */
+ for (i *= 4; i < payload_len; i++) {
+ ioc->encinput.buffer[i] ^= ioc->mask.c[i % 4];
+ }
+
+ buffer_reserve(&ioc->rawinput, payload_len);
+ buffer_append(&ioc->rawinput, ioc->encinput.buffer, payload_len);
+ buffer_advance(&ioc->encinput, payload_len);
+ return payload_len;
+}
+
+
+QIOChannelWebsock *
+qio_channel_websock_new_server(QIOChannel *master)
+{
+ QIOChannelWebsock *wioc;
+ QIOChannel *ioc;
+
+ wioc = QIO_CHANNEL_WEBSOCK(object_new(TYPE_QIO_CHANNEL_WEBSOCK));
+ ioc = QIO_CHANNEL(wioc);
+
+ wioc->master = master;
+ if (master->features & (1 << QIO_CHANNEL_FEATURE_SHUTDOWN)) {
+ ioc->features |= (1 << QIO_CHANNEL_FEATURE_SHUTDOWN);
+ }
+ object_ref(OBJECT(master));
+
+ trace_qio_channel_websock_new_server(wioc, master);
+ return wioc;
+}
+
+void qio_channel_websock_handshake(QIOChannelWebsock *ioc,
+ QIOTaskFunc func,
+ gpointer opaque,
+ GDestroyNotify destroy)
+{
+ QIOTask *task;
+
+ task = qio_task_new(OBJECT(ioc),
+ func,
+ opaque,
+ destroy);
+
+ trace_qio_channel_websock_handshake_start(ioc);
+ trace_qio_channel_websock_handshake_pending(ioc, G_IO_IN);
+ qio_channel_add_watch(ioc->master,
+ G_IO_IN,
+ qio_channel_websock_handshake_io,
+ task,
+ NULL);
+}
+
+
+static void qio_channel_websock_finalize(Object *obj)
+{
+ QIOChannelWebsock *ioc = QIO_CHANNEL_WEBSOCK(obj);
+
+ buffer_free(&ioc->encinput);
+ buffer_free(&ioc->encoutput);
+ buffer_free(&ioc->rawinput);
+ buffer_free(&ioc->rawoutput);
+ object_unref(OBJECT(ioc->master));
+ if (ioc->io_tag) {
+ g_source_remove(ioc->io_tag);
+ }
+ if (ioc->io_err) {
+ error_free(ioc->io_err);
+ }
+}
+
+
+static ssize_t qio_channel_websock_read_wire(QIOChannelWebsock *ioc,
+ Error **errp)
+{
+ ssize_t ret;
+
+ if (ioc->encinput.offset < 4096) {
+ size_t want = 4096 - ioc->encinput.offset;
+
+ buffer_reserve(&ioc->encinput, want);
+ ret = qio_channel_read(ioc->master,
+ (char *)ioc->encinput.buffer +
+ ioc->encinput.offset,
+ want,
+ errp);
+ if (ret < 0) {
+ return ret;
+ }
+ if (ret == 0 &&
+ ioc->encinput.offset == 0) {
+ return 0;
+ }
+ ioc->encinput.offset += ret;
+ }
+
+ if (ioc->payload_remain == 0) {
+ ret = qio_channel_websock_decode_header(ioc, errp);
+ if (ret < 0) {
+ return ret;
+ }
+ if (ret == 0) {
+ return 0;
+ }
+ }
+
+ ret = qio_channel_websock_decode_payload(ioc, errp);
+ if (ret < 0) {
+ return ret;
+ }
+ return ret;
+}
+
+
+static ssize_t qio_channel_websock_write_wire(QIOChannelWebsock *ioc,
+ Error **errp)
+{
+ ssize_t ret;
+ ssize_t done = 0;
+ qio_channel_websock_encode(ioc);
+
+ while (ioc->encoutput.offset > 0) {
+ ret = qio_channel_write(ioc->master,
+ (char *)ioc->encoutput.buffer,
+ ioc->encoutput.offset,
+ errp);
+ if (ret < 0) {
+ if (ret == QIO_CHANNEL_ERR_BLOCK &&
+ done > 0) {
+ return done;
+ } else {
+ return ret;
+ }
+ }
+ buffer_advance(&ioc->encoutput, ret);
+ done += ret;
+ }
+ return done;
+}
+
+
+static void qio_channel_websock_flush_free(gpointer user_data)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(user_data);
+ object_unref(OBJECT(wioc));
+}
+
+static void qio_channel_websock_set_watch(QIOChannelWebsock *ioc);
+
+static gboolean qio_channel_websock_flush(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer user_data)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(user_data);
+ ssize_t ret;
+
+ if (condition & G_IO_OUT) {
+ ret = qio_channel_websock_write_wire(wioc, &wioc->io_err);
+ if (ret < 0) {
+ goto cleanup;
+ }
+ }
+
+ if (condition & G_IO_IN) {
+ ret = qio_channel_websock_read_wire(wioc, &wioc->io_err);
+ if (ret < 0) {
+ goto cleanup;
+ }
+ if (ret == 0) {
+ wioc->io_eof = TRUE;
+ }
+ }
+
+ cleanup:
+ qio_channel_websock_set_watch(wioc);
+ return FALSE;
+}
+
+
+static void qio_channel_websock_unset_watch(QIOChannelWebsock *ioc)
+{
+ if (ioc->io_tag) {
+ g_source_remove(ioc->io_tag);
+ ioc->io_tag = 0;
+ }
+}
+
+static void qio_channel_websock_set_watch(QIOChannelWebsock *ioc)
+{
+ GIOCondition cond = 0;
+
+ qio_channel_websock_unset_watch(ioc);
+
+ if (ioc->io_err) {
+ return;
+ }
+
+ if (ioc->encoutput.offset) {
+ cond |= G_IO_OUT;
+ }
+ if (ioc->encinput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER &&
+ !ioc->io_eof) {
+ cond |= G_IO_IN;
+ }
+
+ if (cond) {
+ object_ref(OBJECT(ioc));
+ ioc->io_tag =
+ qio_channel_add_watch(ioc->master,
+ cond,
+ qio_channel_websock_flush,
+ ioc,
+ qio_channel_websock_flush_free);
+ }
+}
+
+
+static ssize_t qio_channel_websock_readv(QIOChannel *ioc,
+ const struct iovec *iov,
+ size_t niov,
+ int **fds,
+ size_t *nfds,
+ Error **errp)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc);
+ size_t i;
+ ssize_t got = 0;
+ ssize_t ret;
+
+ if (wioc->io_err) {
+ *errp = error_copy(wioc->io_err);
+ return -1;
+ }
+
+ if (!wioc->rawinput.offset) {
+ ret = qio_channel_websock_read_wire(QIO_CHANNEL_WEBSOCK(ioc), errp);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ for (i = 0 ; i < niov ; i++) {
+ size_t want = iov[i].iov_len;
+ if (want > (wioc->rawinput.offset - got)) {
+ want = (wioc->rawinput.offset - got);
+ }
+
+ memcpy(iov[i].iov_base,
+ wioc->rawinput.buffer + got,
+ want);
+ got += want;
+
+ if (want < iov[i].iov_len) {
+ break;
+ }
+ }
+
+ buffer_advance(&wioc->rawinput, got);
+ qio_channel_websock_set_watch(wioc);
+ return got;
+}
+
+
+static ssize_t qio_channel_websock_writev(QIOChannel *ioc,
+ const struct iovec *iov,
+ size_t niov,
+ int *fds,
+ size_t nfds,
+ Error **errp)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc);
+ size_t i;
+ ssize_t done = 0;
+ ssize_t ret;
+
+ if (wioc->io_err) {
+ *errp = error_copy(wioc->io_err);
+ return -1;
+ }
+
+ if (wioc->io_eof) {
+ error_setg(errp, "%s", "Broken pipe");
+ return -1;
+ }
+
+ for (i = 0; i < niov; i++) {
+ size_t want = iov[i].iov_len;
+ if ((want + wioc->rawoutput.offset) > QIO_CHANNEL_WEBSOCK_MAX_BUFFER) {
+ want = (QIO_CHANNEL_WEBSOCK_MAX_BUFFER - wioc->rawoutput.offset);
+ }
+ if (want == 0) {
+ goto done;
+ }
+
+ buffer_reserve(&wioc->rawoutput, want);
+ buffer_append(&wioc->rawoutput, iov[i].iov_base, want);
+ done += want;
+ if (want < iov[i].iov_len) {
+ break;
+ }
+ }
+
+ done:
+ ret = qio_channel_websock_write_wire(wioc, errp);
+ if (ret < 0 &&
+ ret != QIO_CHANNEL_ERR_BLOCK) {
+ qio_channel_websock_unset_watch(wioc);
+ return -1;
+ }
+
+ qio_channel_websock_set_watch(wioc);
+
+ if (done == 0) {
+ return QIO_CHANNEL_ERR_BLOCK;
+ }
+
+ return done;
+}
+
+static int qio_channel_websock_set_blocking(QIOChannel *ioc,
+ bool enabled,
+ Error **errp)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc);
+
+ qio_channel_set_blocking(wioc->master, enabled, errp);
+ return 0;
+}
+
+static void qio_channel_websock_set_delay(QIOChannel *ioc,
+ bool enabled)
+{
+ QIOChannelWebsock *tioc = QIO_CHANNEL_WEBSOCK(ioc);
+
+ qio_channel_set_delay(tioc->master, enabled);
+}
+
+static void qio_channel_websock_set_cork(QIOChannel *ioc,
+ bool enabled)
+{
+ QIOChannelWebsock *tioc = QIO_CHANNEL_WEBSOCK(ioc);
+
+ qio_channel_set_cork(tioc->master, enabled);
+}
+
+static int qio_channel_websock_shutdown(QIOChannel *ioc,
+ QIOChannelShutdown how,
+ Error **errp)
+{
+ QIOChannelWebsock *tioc = QIO_CHANNEL_WEBSOCK(ioc);
+
+ return qio_channel_shutdown(tioc->master, how, errp);
+}
+
+static int qio_channel_websock_close(QIOChannel *ioc,
+ Error **errp)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc);
+
+ return qio_channel_close(wioc->master, errp);
+}
+
+typedef struct QIOChannelWebsockSource QIOChannelWebsockSource;
+struct QIOChannelWebsockSource {
+ GSource parent;
+ QIOChannelWebsock *wioc;
+ GIOCondition condition;
+};
+
+static gboolean
+qio_channel_websock_source_prepare(GSource *source,
+ gint *timeout)
+{
+ QIOChannelWebsockSource *wsource = (QIOChannelWebsockSource *)source;
+ GIOCondition cond = 0;
+ *timeout = -1;
+
+ if (wsource->wioc->rawinput.offset) {
+ cond |= G_IO_IN;
+ }
+ if (wsource->wioc->rawoutput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER) {
+ cond |= G_IO_OUT;
+ }
+
+ return cond & wsource->condition;
+}
+
+static gboolean
+qio_channel_websock_source_check(GSource *source)
+{
+ QIOChannelWebsockSource *wsource = (QIOChannelWebsockSource *)source;
+ GIOCondition cond = 0;
+
+ if (wsource->wioc->rawinput.offset) {
+ cond |= G_IO_IN;
+ }
+ if (wsource->wioc->rawoutput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER) {
+ cond |= G_IO_OUT;
+ }
+
+ return cond & wsource->condition;
+}
+
+static gboolean
+qio_channel_websock_source_dispatch(GSource *source,
+ GSourceFunc callback,
+ gpointer user_data)
+{
+ QIOChannelFunc func = (QIOChannelFunc)callback;
+ QIOChannelWebsockSource *wsource = (QIOChannelWebsockSource *)source;
+ GIOCondition cond = 0;
+
+ if (wsource->wioc->rawinput.offset) {
+ cond |= G_IO_IN;
+ }
+ if (wsource->wioc->rawoutput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER) {
+ cond |= G_IO_OUT;
+ }
+
+ return (*func)(QIO_CHANNEL(wsource->wioc),
+ (cond & wsource->condition),
+ user_data);
+}
+
+static void
+qio_channel_websock_source_finalize(GSource *source)
+{
+ QIOChannelWebsockSource *ssource = (QIOChannelWebsockSource *)source;
+
+ object_unref(OBJECT(ssource->wioc));
+}
+
+GSourceFuncs qio_channel_websock_source_funcs = {
+ qio_channel_websock_source_prepare,
+ qio_channel_websock_source_check,
+ qio_channel_websock_source_dispatch,
+ qio_channel_websock_source_finalize
+};
+
+static GSource *qio_channel_websock_create_watch(QIOChannel *ioc,
+ GIOCondition condition)
+{
+ QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc);
+ QIOChannelWebsockSource *ssource;
+ GSource *source;
+
+ source = g_source_new(&qio_channel_websock_source_funcs,
+ sizeof(QIOChannelWebsockSource));
+ ssource = (QIOChannelWebsockSource *)source;
+
+ ssource->wioc = wioc;
+ object_ref(OBJECT(wioc));
+
+ ssource->condition = condition;
+
+ qio_channel_websock_set_watch(wioc);
+ return source;
+}
+
+static void qio_channel_websock_class_init(ObjectClass *klass,
+ void *class_data G_GNUC_UNUSED)
+{
+ QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
+
+ ioc_klass->io_writev = qio_channel_websock_writev;
+ ioc_klass->io_readv = qio_channel_websock_readv;
+ ioc_klass->io_set_blocking = qio_channel_websock_set_blocking;
+ ioc_klass->io_set_cork = qio_channel_websock_set_cork;
+ ioc_klass->io_set_delay = qio_channel_websock_set_delay;
+ ioc_klass->io_close = qio_channel_websock_close;
+ ioc_klass->io_shutdown = qio_channel_websock_shutdown;
+ ioc_klass->io_create_watch = qio_channel_websock_create_watch;
+}
+
+static const TypeInfo qio_channel_websock_info = {
+ .parent = TYPE_QIO_CHANNEL,
+ .name = TYPE_QIO_CHANNEL_WEBSOCK,
+ .instance_size = sizeof(QIOChannelWebsock),
+ .instance_finalize = qio_channel_websock_finalize,
+ .class_init = qio_channel_websock_class_init,
+};
+
+static void qio_channel_websock_register_types(void)
+{
+ type_register_static(&qio_channel_websock_info);
+}
+
+type_init(qio_channel_websock_register_types);