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      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 #define TRACE_TAG TRANSPORT
     18 
     19 #include "sysdeps.h"
     20 #include "transport.h"
     21 
     22 #include <stdio.h>
     23 #include <stdlib.h>
     24 #include <string.h>
     25 
     26 #include "adb.h"
     27 
     28 static int remote_read(apacket *p, atransport *t)
     29 {
     30     if(usb_read(t->usb, &p->msg, sizeof(amessage))){
     31         D("remote usb: read terminated (message)");
     32         return -1;
     33     }
     34 
     35     if(check_header(p, t)) {
     36         D("remote usb: check_header failed");
     37         return -1;
     38     }
     39 
     40     if(p->msg.data_length) {
     41         if(usb_read(t->usb, p->data, p->msg.data_length)){
     42             D("remote usb: terminated (data)");
     43             return -1;
     44         }
     45     }
     46 
     47     if(check_data(p)) {
     48         D("remote usb: check_data failed");
     49         return -1;
     50     }
     51 
     52     return 0;
     53 }
     54 
     55 static int remote_write(apacket *p, atransport *t)
     56 {
     57     unsigned size = p->msg.data_length;
     58 
     59     if(usb_write(t->usb, &p->msg, sizeof(amessage))) {
     60         D("remote usb: 1 - write terminated");
     61         return -1;
     62     }
     63     if(p->msg.data_length == 0) return 0;
     64     if(usb_write(t->usb, &p->data, size)) {
     65         D("remote usb: 2 - write terminated");
     66         return -1;
     67     }
     68 
     69     return 0;
     70 }
     71 
     72 static void remote_close(atransport *t)
     73 {
     74     usb_close(t->usb);
     75     t->usb = 0;
     76 }
     77 
     78 static void remote_kick(atransport *t)
     79 {
     80     usb_kick(t->usb);
     81 }
     82 
     83 void init_usb_transport(atransport *t, usb_handle *h, ConnectionState state)
     84 {
     85     D("transport: usb");
     86     t->close = remote_close;
     87     t->SetKickFunction(remote_kick);
     88     t->read_from_remote = remote_read;
     89     t->write_to_remote = remote_write;
     90     t->sync_token = 1;
     91     t->connection_state = state;
     92     t->type = kTransportUsb;
     93     t->usb = h;
     94 }
     95 
     96 #if ADB_HOST
     97 int is_adb_interface(int vid, int pid, int usb_class, int usb_subclass, int usb_protocol)
     98 {
     99     return (usb_class == ADB_CLASS && usb_subclass == ADB_SUBCLASS && usb_protocol == ADB_PROTOCOL);
    100 }
    101 #endif
    102