| 1 | /*
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| 2 | * Copyright (c) 2011 Vojtech Horky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup drvusbvhc
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * Connection handling of calls from virtual device (implementation).
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| 34 | */
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| 35 |
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| 36 | #include <assert.h>
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| 37 | #include <errno.h>
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| 38 | #include <ddf/driver.h>
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| 39 | #include <usbvirt/ipc.h>
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| 40 | #include <usb/debug.h>
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| 41 | #include <async.h>
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| 42 |
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| 43 | #include "vhcd.h"
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| 44 |
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| 45 | static fibril_local uintptr_t plugged_device_handle = 0;
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| 46 | #define PLUGGED_DEVICE_NAME_MAXLEN 256
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| 47 | static fibril_local char plugged_device_name[PLUGGED_DEVICE_NAME_MAXLEN + 1] = "<unknown>";
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| 48 |
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| 49 | /** Receive device name.
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| 50 | *
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| 51 | * @warning Errors are silently ignored.
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| 52 | *
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| 53 | * @param sess Session to the virtual device.
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| 54 | *
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| 55 | */
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| 56 | static void receive_device_name(async_sess_t *sess)
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| 57 | {
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| 58 | async_exch_t *exch = async_exchange_begin(sess);
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| 59 |
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| 60 | aid_t opening_request = async_send_0(exch, IPC_M_USBVIRT_GET_NAME, NULL);
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| 61 | if (opening_request == 0) {
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| 62 | async_exchange_end(exch);
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| 63 | return;
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| 64 | }
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| 65 |
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| 66 | ipc_call_t data_request_call;
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| 67 | aid_t data_request = async_data_read(exch, plugged_device_name,
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| 68 | PLUGGED_DEVICE_NAME_MAXLEN, &data_request_call);
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| 69 |
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| 70 | async_exchange_end(exch);
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| 71 |
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| 72 | if (data_request == 0) {
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| 73 | async_forget(opening_request);
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| 74 | return;
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| 75 | }
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| 76 |
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| 77 | errno_t data_request_rc;
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| 78 | errno_t opening_request_rc;
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| 79 | async_wait_for(data_request, &data_request_rc);
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| 80 | async_wait_for(opening_request, &opening_request_rc);
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| 81 |
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| 82 | if ((data_request_rc != EOK) || (opening_request_rc != EOK))
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| 83 | return;
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| 84 |
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| 85 | size_t len = ipc_get_arg2(&data_request_call);
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| 86 | plugged_device_name[len] = 0;
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| 87 | }
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| 88 |
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| 89 | /** Default handler for IPC methods not handled by DDF.
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| 90 | *
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| 91 | * @param fun Device handling the call.
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| 92 | * @param icall Call data.
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| 93 | *
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| 94 | */
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| 95 | void default_connection_handler(ddf_fun_t *fun, ipc_call_t *icall)
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| 96 | {
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| 97 | vhc_data_t *vhc = ddf_fun_data_get(fun);
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| 98 |
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| 99 | async_sess_t *callback =
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| 100 | async_callback_receive_start(EXCHANGE_SERIALIZE, icall);
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| 101 |
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| 102 | if (callback) {
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| 103 | errno_t rc = vhc_virtdev_plug(vhc, callback, &plugged_device_handle);
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| 104 | if (rc != EOK) {
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| 105 | async_answer_0(icall, rc);
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| 106 | async_hangup(callback);
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| 107 | return;
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| 108 | }
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| 109 |
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| 110 | async_answer_0(icall, EOK);
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| 111 |
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| 112 | receive_device_name(callback);
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| 113 |
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| 114 | usb_log_info("New virtual device `%s' (id: %" PRIxn ").",
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| 115 | plugged_device_name, plugged_device_handle);
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| 116 | } else
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| 117 | async_answer_0(icall, EINVAL);
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| 118 | }
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| 119 |
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| 120 | /** Callback when client disconnects.
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| 121 | *
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| 122 | * Used to unplug virtual USB device.
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| 123 | *
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| 124 | * @param fun
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| 125 | */
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| 126 | void on_client_close(ddf_fun_t *fun)
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| 127 | {
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| 128 | vhc_data_t *vhc = ddf_fun_data_get(fun);
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| 129 |
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| 130 | if (plugged_device_handle != 0) {
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| 131 | usb_log_info("Virtual device `%s' disconnected (id: %" PRIxn ").",
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| 132 | plugged_device_name, plugged_device_handle);
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| 133 | vhc_virtdev_unplug(vhc, plugged_device_handle);
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| 134 | }
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| 135 | }
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| 136 |
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| 137 | /**
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| 138 | * @}
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| 139 | */
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