2 * Copyright (C) 2007 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
23 #include <sys/types.h>
25 #define TRACE_TAG TRACE_TRANSPORT
29 #define H4(x) (((x) & 0xFF000000) >> 24) | (((x) & 0x00FF0000) >> 8) | (((x) & 0x0000FF00) << 8) | (((x) & 0x000000FF) << 24)
30 static inline void fix_endians(apacket *p)
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);
40 #define fix_endians(p) do {} while (0)
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.
48 #define SDB_LOCAL_TRANSPORT_MAX 16
50 SDB_MUTEX_DEFINE( local_transports_lock );
52 static atransport* local_transports[ SDB_LOCAL_TRANSPORT_MAX ];
55 static int remote_read(apacket *p, atransport *t)
57 if(readx(t->sfd, &p->msg, sizeof(amessage))){
58 D("remote local: read terminated (message)\n");
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);
69 D("bad header: terminated (data)\n");
73 if(readx(t->sfd, p->data, p->msg.data_length)){
74 D("remote local: terminated (data)\n");
79 D("bad data: terminated (data)\n");
86 static int remote_write(apacket *p, atransport *t)
88 int length = p->msg.data_length;
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);
96 if(writex(t->sfd, &p->msg, sizeof(amessage) + length)) {
97 D("remote local: write terminated\n");
105 int local_connect(int port) {
106 return local_connect_arbitrary_ports(port-1, port);
109 int local_connect_arbitrary_ports(int console_port, int sdb_port)
115 const char *host = getenv("SDBHOST");
117 fd = socket_network_client(host, sdb_port, SOCK_STREAM);
121 fd = socket_loopback_client(sdb_port, SOCK_STREAM);
125 D("client: connected on remote on fd %d\n", fd);
127 disable_tcp_nagle(fd);
128 snprintf(buf, sizeof buf, "%s%d", LOCAL_CLIENT_PREFIX, console_port);
129 register_socket_transport(fd, buf, sdb_port, 1);
136 static void *client_socket_thread(void *x)
140 int port = DEFAULT_SDB_LOCAL_TRANSPORT_PORT;
141 int count = SDB_LOCAL_TRANSPORT_MAX;
143 D("transport: client_socket_thread() starting\n");
145 /* try to connect to any number of running emulator instances */
146 /* this is only done when SDB starts up. later, each new emulator */
147 /* will send a message to SDB to indicate that is is starting up */
148 for ( ; count > 0; count--, port += 10 ) {
149 (void) local_connect(port);
152 // sdb_sleep_ms(1000);
158 static void *server_socket_thread(void * arg)
161 struct sockaddr addr;
165 D("transport: server_socket_thread() starting\n");
169 serverfd = socket_inaddr_any_server(port, SOCK_STREAM);
171 D("server: cannot bind socket yet\n");
175 close_on_exec(serverfd);
179 D("server: trying to get new connection from %d\n", port);
180 fd = sdb_socket_accept(serverfd, &addr, &alen);
182 D("server: new connection on fd %d\n", fd);
184 disable_tcp_nagle(fd);
185 register_socket_transport(fd, "host", port, 1);
188 D("transport: server_socket_thread() exiting\n");
192 void local_init(int port)
195 void* (*func)(void *);
198 func = client_socket_thread;
200 func = server_socket_thread;
203 D("transport: local %s init\n", HOST ? "client" : "server");
205 if(sdb_thread_create(&thr, func, (void *)port)) {
206 fatal_errno("cannot create local socket %s thread",
207 HOST ? "client" : "server");
211 static void remote_kick(atransport *t)
221 sdb_mutex_lock( &local_transports_lock );
222 for (nn = 0; nn < SDB_LOCAL_TRANSPORT_MAX; nn++) {
223 if (local_transports[nn] == t) {
224 local_transports[nn] = NULL;
228 sdb_mutex_unlock( &local_transports_lock );
233 static void remote_close(atransport *t)
240 /* Only call this function if you already hold local_transports_lock. */
241 atransport* find_emulator_transport_by_sdb_port_locked(int sdb_port)
244 for (i = 0; i < SDB_LOCAL_TRANSPORT_MAX; i++) {
245 if (local_transports[i] && local_transports[i]->sdb_port == sdb_port) {
246 return local_transports[i];
252 atransport* find_emulator_transport_by_sdb_port(int sdb_port)
254 sdb_mutex_lock( &local_transports_lock );
255 atransport* result = find_emulator_transport_by_sdb_port_locked(sdb_port);
256 sdb_mutex_unlock( &local_transports_lock );
260 /* Only call this function if you already hold local_transports_lock. */
261 int get_available_local_transport_index_locked()
264 for (i = 0; i < SDB_LOCAL_TRANSPORT_MAX; i++) {
265 if (local_transports[i] == NULL) {
272 int get_available_local_transport_index()
274 sdb_mutex_lock( &local_transports_lock );
275 int result = get_available_local_transport_index_locked();
276 sdb_mutex_unlock( &local_transports_lock );
281 int init_socket_transport(atransport *t, int s, int sdb_port, int local)
285 t->kick = remote_kick;
286 t->close = remote_close;
287 t->read_from_remote = remote_read;
288 t->write_to_remote = remote_write;
291 t->connection_state = CS_OFFLINE;
292 t->type = kTransportLocal;
297 sdb_mutex_lock( &local_transports_lock );
299 t->sdb_port = sdb_port;
300 atransport* existing_transport =
301 find_emulator_transport_by_sdb_port_locked(sdb_port);
302 int index = get_available_local_transport_index_locked();
303 if (existing_transport != NULL) {
304 D("local transport for port %d already registered (%p)?\n",
305 sdb_port, existing_transport);
307 } else if (index < 0) {
308 // Too many emulators.
309 D("cannot register more emulators. Maximum is %d\n",
310 SDB_LOCAL_TRANSPORT_MAX);
313 local_transports[index] = t;
316 sdb_mutex_unlock( &local_transports_lock );