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)
fix_endians(apacket * p)28 static 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 }
host_to_le32(unsigned n)37 unsigned host_to_le32(unsigned n)
38 {
39 return H4(n);
40 }
41 #else
42 #define fix_endians(p) do {} while (0)
host_to_le32(unsigned n)43 unsigned host_to_le32(unsigned n)
44 {
45 return n;
46 }
47 #endif
48
remote_read(apacket * p,atransport * t)49 static 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
remote_write(apacket * p,atransport * t)78 static 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
remote_close(atransport * t)97 static void remote_close(atransport *t)
98 {
99 usb_close(t->usb);
100 t->usb = 0;
101 }
102
remote_kick(atransport * t)103 static void remote_kick(atransport *t)
104 {
105 usb_kick(t->usb);
106 }
107
init_usb_transport(atransport * t,usb_handle * h,int state)108 void 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