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1  /*
2   * Copyright (c) 2009-2013, Google Inc.
3   * All rights reserved.
4   *
5   * Redistribution and use in source and binary forms, with or without
6   * modification, are permitted provided that the following conditions
7   * are met:
8   *  * Redistributions of source code must retain the above copyright
9   *    notice, this list of conditions and the following disclaimer.
10   *  * Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in
12   *    the documentation and/or other materials provided with the
13   *    distribution.
14   *  * Neither the name of Google, Inc. nor the names of its contributors
15   *    may be used to endorse or promote products derived from this
16   *    software without specific prior written permission.
17   *
18   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29   * SUCH DAMAGE.
30   */
31  
32  #include <stdlib.h>
33  #include <sys/types.h>
34  #include <sys/socket.h>
35  #include <unistd.h>
36  #include <cutils/sockets.h>
37  
38  #include "debug.h"
39  #include "transport.h"
40  #include "utils.h"
41  
42  
43  #define container_of(ptr, type, member) \
44      ((type*)((char*)(ptr) - offsetof(type, member)))
45  
46  #define SOCKET_WORKING 0
47  #define SOCKET_STOPPED -1
48  
49  
50  struct socket_transport {
51      struct transport transport;
52  
53      int fd;
54  };
55  
56  struct socket_handle {
57      struct transport_handle handle;
58  
59      int fd;
60  };
61  
socket_close(struct transport_handle * thandle)62  void socket_close(struct transport_handle *thandle)
63  {
64      struct socket_handle * handle = container_of(thandle, struct socket_handle, handle);
65      close(handle->fd);
66  }
67  
socket_connect(struct transport * transport)68  struct transport_handle *socket_connect(struct transport *transport)
69  {
70      struct socket_handle *handle = calloc(sizeof(struct socket_handle), 1);
71      struct socket_transport *socket_transport = container_of(transport, struct socket_transport, transport);
72      struct sockaddr addr;
73      socklen_t alen = sizeof(addr);
74  
75      handle->fd = accept(socket_transport->fd, &addr, &alen);
76  
77      if (handle->fd < 0) {
78          D(WARN, "socket connect error");
79          return NULL;
80      }
81  
82      D(DEBUG, "[ socket_thread - registering device ]");
83      return &handle->handle;
84  }
85  
socket_write(struct transport_handle * thandle,const void * data,size_t len)86  ssize_t socket_write(struct transport_handle *thandle, const void *data, size_t len)
87  {
88      ssize_t ret;
89      struct socket_handle *handle = container_of(thandle, struct socket_handle, handle);
90  
91      D(DEBUG, "about to write (fd=%d, len=%zu)", handle->fd, len);
92      ret = bulk_write(handle->fd, data, len);
93      if (ret < 0) {
94          D(ERR, "ERROR: fd = %d, ret = %zd", handle->fd, ret);
95          return -1;
96      }
97      D(DEBUG, "[ socket_write done fd=%d ]", handle->fd);
98      return ret;
99  }
100  
socket_read(struct transport_handle * thandle,void * data,size_t len)101  ssize_t socket_read(struct transport_handle *thandle, void *data, size_t len)
102  {
103      ssize_t ret;
104      struct socket_handle *handle = container_of(thandle, struct socket_handle, handle);
105  
106      D(DEBUG, "about to read (fd=%d, len=%zu)", handle->fd, len);
107      ret = bulk_read(handle->fd, data, len);
108      if (ret < 0) {
109          D(ERR, "ERROR: fd = %d, ret = %zd", handle->fd, ret);
110          return -1;
111      }
112      D(DEBUG, "[ socket_read done fd=%d ret=%zd]", handle->fd, ret);
113      return ret;
114  }
115  
listen_socket_init(struct socket_transport * socket_transport)116  static int listen_socket_init(struct socket_transport *socket_transport)
117  {
118      int s = android_get_control_socket("fastbootd");
119  
120      if (s < 0) {
121          D(WARN, "android_get_control_socket(fastbootd): %s\n", strerror(errno));
122          return 0;
123      }
124  
125      if (listen(s, 4) < 0) {
126          D(WARN, "listen(control socket): %s\n", strerror(errno));
127          return 0;
128      }
129  
130      socket_transport->fd = s;
131  
132      return 1;
133  }
134  
135  
transport_socket_init()136  int transport_socket_init()
137  {
138      struct socket_transport *socket_transport = malloc(sizeof(struct socket_transport));
139  
140      socket_transport->transport.connect = socket_connect;
141      socket_transport->transport.close = socket_close;
142      socket_transport->transport.read = socket_read;
143      socket_transport->transport.write = socket_write;
144  
145      if (!listen_socket_init(socket_transport)) {
146          D(ERR, "socket transport init failed");
147          free(socket_transport);
148          return 0;
149      }
150  
151      transport_register(&socket_transport->transport);
152      return 1;
153  }
154  
155