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 #include <errno.h>
21
22 #include "sysdeps.h"
23 #include <sys/types.h>
24
25 #define TRACE_TAG TRACE_TRANSPORT
26 #include "adb.h"
27
28 #ifdef __ppc__
29 #define H4(x) (((x) & 0xFF000000) >> 24) | (((x) & 0x00FF0000) >> 8) | (((x) & 0x0000FF00) << 8) | (((x) & 0x000000FF) << 24)
fix_endians(apacket * p)30 static inline void fix_endians(apacket *p)
31 {
32 p->msg.command = H4(p->msg.command);
33 p->msg.arg0 = H4(p->msg.arg0);
34 p->msg.arg1 = H4(p->msg.arg1);
35 p->msg.data_length = H4(p->msg.data_length);
36 p->msg.data_check = H4(p->msg.data_check);
37 p->msg.magic = H4(p->msg.magic);
38 }
39 #else
40 #define fix_endians(p) do {} while (0)
41 #endif
42
43 #if ADB_HOST
44 /* we keep a list of opened transports. The atransport struct knows to which
45 * local transport it is connected. The list is used to detect when we're
46 * trying to connect twice to a given local transport.
47 */
48 #define ADB_LOCAL_TRANSPORT_MAX 16
49
50 ADB_MUTEX_DEFINE( local_transports_lock );
51
52 static atransport* local_transports[ ADB_LOCAL_TRANSPORT_MAX ];
53 #endif /* ADB_HOST */
54
remote_read(apacket * p,atransport * t)55 static int remote_read(apacket *p, atransport *t)
56 {
57 if(readx(t->sfd, &p->msg, sizeof(amessage))){
58 D("remote local: read terminated (message)\n");
59 return -1;
60 }
61
62 fix_endians(p);
63
64 #if 0 && defined __ppc__
65 D("read remote packet: %04x arg0=%0x arg1=%0x data_length=%0x data_check=%0x magic=%0x\n",
66 p->msg.command, p->msg.arg0, p->msg.arg1, p->msg.data_length, p->msg.data_check, p->msg.magic);
67 #endif
68 if(check_header(p)) {
69 D("bad header: terminated (data)\n");
70 return -1;
71 }
72
73 if(readx(t->sfd, p->data, p->msg.data_length)){
74 D("remote local: terminated (data)\n");
75 return -1;
76 }
77
78 if(check_data(p)) {
79 D("bad data: terminated (data)\n");
80 return -1;
81 }
82
83 return 0;
84 }
85
remote_write(apacket * p,atransport * t)86 static int remote_write(apacket *p, atransport *t)
87 {
88 int length = p->msg.data_length;
89
90 fix_endians(p);
91
92 #if 0 && defined __ppc__
93 D("write remote packet: %04x arg0=%0x arg1=%0x data_length=%0x data_check=%0x magic=%0x\n",
94 p->msg.command, p->msg.arg0, p->msg.arg1, p->msg.data_length, p->msg.data_check, p->msg.magic);
95 #endif
96 if(writex(t->sfd, &p->msg, sizeof(amessage) + length)) {
97 D("remote local: write terminated\n");
98 return -1;
99 }
100
101 return 0;
102 }
103
104
local_connect(int port)105 int local_connect(int port) {
106 return local_connect_arbitrary_ports(port-1, port);
107 }
108
local_connect_arbitrary_ports(int console_port,int adb_port)109 int local_connect_arbitrary_ports(int console_port, int adb_port)
110 {
111 char buf[64];
112 int fd = -1;
113
114 #if ADB_HOST
115 const char *host = getenv("ADBHOST");
116 if (host) {
117 fd = socket_network_client(host, adb_port, SOCK_STREAM);
118 }
119 #endif
120 if (fd < 0) {
121 fd = socket_loopback_client(adb_port, SOCK_STREAM);
122 }
123
124 if (fd >= 0) {
125 D("client: connected on remote on fd %d\n", fd);
126 close_on_exec(fd);
127 disable_tcp_nagle(fd);
128 snprintf(buf, sizeof buf, "%s%d", LOCAL_CLIENT_PREFIX, console_port);
129 register_socket_transport(fd, buf, adb_port, 1);
130 return 0;
131 }
132 return -1;
133 }
134
135
client_socket_thread(void * x)136 static void *client_socket_thread(void *x)
137 {
138 #if ADB_HOST
139 int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
140 int count = ADB_LOCAL_TRANSPORT_MAX;
141
142 D("transport: client_socket_thread() starting\n");
143
144 /* try to connect to any number of running emulator instances */
145 /* this is only done when ADB starts up. later, each new emulator */
146 /* will send a message to ADB to indicate that is is starting up */
147 for ( ; count > 0; count--, port += 2 ) {
148 (void) local_connect(port);
149 }
150 #endif
151 return 0;
152 }
153
server_socket_thread(void * arg)154 static void *server_socket_thread(void * arg)
155 {
156 int serverfd, fd;
157 struct sockaddr addr;
158 socklen_t alen;
159 int port = (int)arg;
160
161 D("transport: server_socket_thread() starting\n");
162 serverfd = -1;
163 for(;;) {
164 if(serverfd == -1) {
165 serverfd = socket_inaddr_any_server(port, SOCK_STREAM);
166 if(serverfd < 0) {
167 D("server: cannot bind socket yet\n");
168 adb_sleep_ms(1000);
169 continue;
170 }
171 close_on_exec(serverfd);
172 }
173
174 alen = sizeof(addr);
175 D("server: trying to get new connection from %d\n", port);
176 fd = adb_socket_accept(serverfd, &addr, &alen);
177 if(fd >= 0) {
178 D("server: new connection on fd %d\n", fd);
179 close_on_exec(fd);
180 disable_tcp_nagle(fd);
181 register_socket_transport(fd, "host", port, 1);
182 }
183 }
184 D("transport: server_socket_thread() exiting\n");
185 return 0;
186 }
187
local_init(int port)188 void local_init(int port)
189 {
190 adb_thread_t thr;
191 void* (*func)(void *);
192
193 if(HOST) {
194 func = client_socket_thread;
195 } else {
196 func = server_socket_thread;
197 }
198
199 D("transport: local %s init\n", HOST ? "client" : "server");
200
201 if(adb_thread_create(&thr, func, (void *)port)) {
202 fatal_errno("cannot create local socket %s thread",
203 HOST ? "client" : "server");
204 }
205 }
206
remote_kick(atransport * t)207 static void remote_kick(atransport *t)
208 {
209 int fd = t->sfd;
210 t->sfd = -1;
211 adb_shutdown(fd);
212 adb_close(fd);
213
214 #if ADB_HOST
215 if(HOST) {
216 int nn;
217 adb_mutex_lock( &local_transports_lock );
218 for (nn = 0; nn < ADB_LOCAL_TRANSPORT_MAX; nn++) {
219 if (local_transports[nn] == t) {
220 local_transports[nn] = NULL;
221 break;
222 }
223 }
224 adb_mutex_unlock( &local_transports_lock );
225 }
226 #endif
227 }
228
remote_close(atransport * t)229 static void remote_close(atransport *t)
230 {
231 adb_close(t->fd);
232 }
233
234
235 #if ADB_HOST
236 /* Only call this function if you already hold local_transports_lock. */
find_emulator_transport_by_adb_port_locked(int adb_port)237 atransport* find_emulator_transport_by_adb_port_locked(int adb_port)
238 {
239 int i;
240 for (i = 0; i < ADB_LOCAL_TRANSPORT_MAX; i++) {
241 if (local_transports[i] && local_transports[i]->adb_port == adb_port) {
242 return local_transports[i];
243 }
244 }
245 return NULL;
246 }
247
find_emulator_transport_by_adb_port(int adb_port)248 atransport* find_emulator_transport_by_adb_port(int adb_port)
249 {
250 adb_mutex_lock( &local_transports_lock );
251 atransport* result = find_emulator_transport_by_adb_port_locked(adb_port);
252 adb_mutex_unlock( &local_transports_lock );
253 return result;
254 }
255
256 /* Only call this function if you already hold local_transports_lock. */
get_available_local_transport_index_locked()257 int get_available_local_transport_index_locked()
258 {
259 int i;
260 for (i = 0; i < ADB_LOCAL_TRANSPORT_MAX; i++) {
261 if (local_transports[i] == NULL) {
262 return i;
263 }
264 }
265 return -1;
266 }
267
get_available_local_transport_index()268 int get_available_local_transport_index()
269 {
270 adb_mutex_lock( &local_transports_lock );
271 int result = get_available_local_transport_index_locked();
272 adb_mutex_unlock( &local_transports_lock );
273 return result;
274 }
275 #endif
276
init_socket_transport(atransport * t,int s,int adb_port,int local)277 int init_socket_transport(atransport *t, int s, int adb_port, int local)
278 {
279 int fail = 0;
280
281 t->kick = remote_kick;
282 t->close = remote_close;
283 t->read_from_remote = remote_read;
284 t->write_to_remote = remote_write;
285 t->sfd = s;
286 t->sync_token = 1;
287 t->connection_state = CS_OFFLINE;
288 t->type = kTransportLocal;
289 t->adb_port = 0;
290
291 #if ADB_HOST
292 if (HOST && local) {
293 adb_mutex_lock( &local_transports_lock );
294 {
295 t->adb_port = adb_port;
296 atransport* existing_transport =
297 find_emulator_transport_by_adb_port_locked(adb_port);
298 int index = get_available_local_transport_index_locked();
299 if (existing_transport != NULL) {
300 D("local transport for port %d already registered (%p)?\n",
301 adb_port, existing_transport);
302 fail = -1;
303 } else if (index < 0) {
304 // Too many emulators.
305 D("cannot register more emulators. Maximum is %d\n",
306 ADB_LOCAL_TRANSPORT_MAX);
307 fail = -1;
308 } else {
309 local_transports[index] = t;
310 }
311 }
312 adb_mutex_unlock( &local_transports_lock );
313 }
314 #endif
315 return fail;
316 }
317