transport_usb.c revision 098d1f63c64cdc0975ce8cd650e82e4043fc2600 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdio.h>
18#include <stdlib.h>
19#include <string.h>
20
21#include <sysdeps.h>
22
23#define  TRACE_TAG  TRACE_TRANSPORT
24#include "adb.h"
25
26#ifdef HAVE_BIG_ENDIAN
27#define H4(x)	(((x) & 0xFF000000) >> 24) | (((x) & 0x00FF0000) >> 8) | (((x) & 0x0000FF00) << 8) | (((x) & 0x000000FF) << 24)
28static inline void fix_endians(apacket *p)
29{
30    p->msg.command     = H4(p->msg.command);
31    p->msg.arg0        = H4(p->msg.arg0);
32    p->msg.arg1        = H4(p->msg.arg1);
33    p->msg.data_length = H4(p->msg.data_length);
34    p->msg.data_check  = H4(p->msg.data_check);
35    p->msg.magic       = H4(p->msg.magic);
36}
37unsigned host_to_le32(unsigned n)
38{
39    return H4(n);
40}
41#else
42#define fix_endians(p) do {} while (0)
43unsigned host_to_le32(unsigned n)
44{
45    return n;
46}
47#endif
48
49static int remote_read(apacket *p, atransport *t)
50{
51    if(usb_read(t->usb, &p->msg, sizeof(amessage))){
52        D("remote usb: read terminated (message)\n");
53        return -1;
54    }
55
56    fix_endians(p);
57
58    if(check_header(p)) {
59        D("remote usb: check_header failed\n");
60        return -1;
61    }
62
63    if(p->msg.data_length) {
64        if(usb_read(t->usb, p->data, p->msg.data_length)){
65            D("remote usb: terminated (data)\n");
66            return -1;
67        }
68    }
69
70    if(check_data(p)) {
71        D("remote usb: check_data failed\n");
72        return -1;
73    }
74
75    return 0;
76}
77
78static int remote_write(apacket *p, atransport *t)
79{
80    unsigned size = p->msg.data_length;
81
82    fix_endians(p);
83
84    if(usb_write(t->usb, &p->msg, sizeof(amessage))) {
85        D("remote usb: 1 - write terminated\n");
86        return -1;
87    }
88    if(p->msg.data_length == 0) return 0;
89    if(usb_write(t->usb, &p->data, size)) {
90        D("remote usb: 2 - write terminated\n");
91        return -1;
92    }
93
94    return 0;
95}
96
97static void remote_close(atransport *t)
98{
99    usb_close(t->usb);
100    t->usb = 0;
101}
102
103static void remote_kick(atransport *t)
104{
105    usb_kick(t->usb);
106}
107
108void init_usb_transport(atransport *t, usb_handle *h, int state)
109{
110    D("transport: usb\n");
111    t->close = remote_close;
112    t->kick = remote_kick;
113    t->read_from_remote = remote_read;
114    t->write_to_remote = remote_write;
115    t->sync_token = 1;
116    t->connection_state = state;
117    t->type = kTransportUsb;
118    t->usb = h;
119
120    HOST = 0;
121}
122