123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441 |
- /*
- * Copyright (C) 2007 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <errno.h>
- #include "sysdeps.h"
- #include <sys/types.h>
- #define TRACE_TAG TRACE_TRANSPORT
- #include "adb.h"
- #ifdef HAVE_BIG_ENDIAN
- #define H4(x) (((x) & 0xFF000000) >> 24) | (((x) & 0x00FF0000) >> 8) | (((x) & 0x0000FF00) << 8) | (((x) & 0x000000FF) << 24)
- static inline void fix_endians(apacket *p)
- {
- p->msg.command = H4(p->msg.command);
- p->msg.arg0 = H4(p->msg.arg0);
- p->msg.arg1 = H4(p->msg.arg1);
- p->msg.data_length = H4(p->msg.data_length);
- p->msg.data_check = H4(p->msg.data_check);
- p->msg.magic = H4(p->msg.magic);
- }
- #else
- #define fix_endians(p) do {} while (0)
- #endif
- #if ADB_HOST
- /* we keep a list of opened transports. The atransport struct knows to which
- * local transport it is connected. The list is used to detect when we're
- * trying to connect twice to a given local transport.
- */
- #define ADB_LOCAL_TRANSPORT_MAX 16
- ADB_MUTEX_DEFINE( local_transports_lock );
- static atransport* local_transports[ ADB_LOCAL_TRANSPORT_MAX ];
- #endif /* ADB_HOST */
- static int remote_read(apacket *p, atransport *t)
- {
- if(readx(t->sfd, &p->msg, sizeof(amessage))){
- D("remote local: read terminated (message)\n");
- return -1;
- }
- fix_endians(p);
- #if 0 && defined HAVE_BIG_ENDIAN
- D("read remote packet: %04x arg0=%0x arg1=%0x data_length=%0x data_check=%0x magic=%0x\n",
- p->msg.command, p->msg.arg0, p->msg.arg1, p->msg.data_length, p->msg.data_check, p->msg.magic);
- #endif
- if(check_header(p)) {
- D("bad header: terminated (data)\n");
- return -1;
- }
- if(readx(t->sfd, p->data, p->msg.data_length)){
- D("remote local: terminated (data)\n");
- return -1;
- }
- if(check_data(p)) {
- D("bad data: terminated (data)\n");
- return -1;
- }
- return 0;
- }
- static int remote_write(apacket *p, atransport *t)
- {
- int length = p->msg.data_length;
- fix_endians(p);
- #if 0 && defined HAVE_BIG_ENDIAN
- D("write remote packet: %04x arg0=%0x arg1=%0x data_length=%0x data_check=%0x magic=%0x\n",
- p->msg.command, p->msg.arg0, p->msg.arg1, p->msg.data_length, p->msg.data_check, p->msg.magic);
- #endif
- if(writex(t->sfd, &p->msg, sizeof(amessage) + length)) {
- D("remote local: write terminated\n");
- return -1;
- }
- return 0;
- }
- int local_connect(int port) {
- return local_connect_arbitrary_ports(port-1, port);
- }
- int local_connect_arbitrary_ports(int console_port, int adb_port)
- {
- char buf[64];
- int fd = -1;
- #if ADB_HOST
- const char *host = getenv("ADBHOST");
- if (host) {
- fd = socket_network_client(host, adb_port, SOCK_STREAM);
- }
- #endif
- if (fd < 0) {
- fd = socket_loopback_client(adb_port, SOCK_STREAM);
- }
- if (fd >= 0) {
- D("client: connected on remote on fd %d\n", fd);
- close_on_exec(fd);
- disable_tcp_nagle(fd);
- snprintf(buf, sizeof buf, "%s%d", LOCAL_CLIENT_PREFIX, console_port);
- register_socket_transport(fd, buf, adb_port, 1);
- return 0;
- }
- return -1;
- }
- static void *client_socket_thread(void *x)
- {
- #if ADB_HOST
- int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
- int count = ADB_LOCAL_TRANSPORT_MAX;
- D("transport: client_socket_thread() starting\n");
- /* try to connect to any number of running emulator instances */
- /* this is only done when ADB starts up. later, each new emulator */
- /* will send a message to ADB to indicate that is is starting up */
- for ( ; count > 0; count--, port += 2 ) {
- (void) local_connect(port);
- }
- #endif
- return 0;
- }
- static void *server_socket_thread(void * arg)
- {
- int serverfd, fd;
- struct sockaddr addr;
- socklen_t alen;
- int port = (int)arg;
- D("transport: server_socket_thread() starting\n");
- serverfd = -1;
- for(;;) {
- if(serverfd == -1) {
- serverfd = socket_inaddr_any_server(port, SOCK_STREAM);
- if(serverfd < 0) {
- D("server: cannot bind socket yet\n");
- adb_sleep_ms(1000);
- continue;
- }
- close_on_exec(serverfd);
- }
- alen = sizeof(addr);
- D("server: trying to get new connection from %d\n", port);
- fd = adb_socket_accept(serverfd, &addr, &alen);
- if(fd >= 0) {
- D("server: new connection on fd %d\n", fd);
- close_on_exec(fd);
- disable_tcp_nagle(fd);
- register_socket_transport(fd, "host", port, 1);
- }
- }
- D("transport: server_socket_thread() exiting\n");
- return 0;
- }
- /* This is relevant only for ADB daemon running inside the emulator. */
- #if !ADB_HOST
- /*
- * Redefine open and write for qemu_pipe.h that contains inlined references
- * to those routines. We will redifine them back after qemu_pipe.h inclusion.
- */
- #undef open
- #undef write
- #define open adb_open
- #define write adb_write
- #include <qemu/qemu_pipe.h>
- #undef open
- #undef write
- #define open ___xxx_open
- #define write ___xxx_write
- /* A worker thread that monitors host connections, and registers a transport for
- * every new host connection. This thread replaces server_socket_thread on
- * condition that adbd daemon runs inside the emulator, and emulator uses QEMUD
- * pipe to communicate with adbd daemon inside the guest. This is done in order
- * to provide more robust communication channel between ADB host and guest. The
- * main issue with server_socket_thread approach is that it runs on top of TCP,
- * and thus is sensitive to network disruptions. For instance, the
- * ConnectionManager may decide to reset all network connections, in which case
- * the connection between ADB host and guest will be lost. To make ADB traffic
- * independent from the network, we use here 'adb' QEMUD service to transfer data
- * between the host, and the guest. See external/qemu/android/adb-*.* that
- * implements the emulator's side of the protocol. Another advantage of using
- * QEMUD approach is that ADB will be up much sooner, since it doesn't depend
- * anymore on network being set up.
- * The guest side of the protocol contains the following phases:
- * - Connect with adb QEMUD service. In this phase a handle to 'adb' QEMUD service
- * is opened, and it becomes clear whether or not emulator supports that
- * protocol.
- * - Wait for the ADB host to create connection with the guest. This is done by
- * sending an 'accept' request to the adb QEMUD service, and waiting on
- * response.
- * - When new ADB host connection is accepted, the connection with adb QEMUD
- * service is registered as the transport, and a 'start' request is sent to the
- * adb QEMUD service, indicating that the guest is ready to receive messages.
- * Note that the guest will ignore messages sent down from the emulator before
- * the transport registration is completed. That's why we need to send the
- * 'start' request after the transport is registered.
- */
- static void *qemu_socket_thread(void * arg)
- {
- /* 'accept' request to the adb QEMUD service. */
- static const char _accept_req[] = "accept";
- /* 'start' request to the adb QEMUD service. */
- static const char _start_req[] = "start";
- /* 'ok' reply from the adb QEMUD service. */
- static const char _ok_resp[] = "ok";
- const int port = (int)arg;
- int res, fd;
- char tmp[256];
- char con_name[32];
- D("transport: qemu_socket_thread() starting\n");
- /* adb QEMUD service connection request. */
- snprintf(con_name, sizeof(con_name), "qemud:adb:%d", port);
- /* Connect to the adb QEMUD service. */
- fd = qemu_pipe_open(con_name);
- if (fd < 0) {
- /* This could be an older version of the emulator, that doesn't
- * implement adb QEMUD service. Fall back to the old TCP way. */
- adb_thread_t thr;
- D("adb service is not available. Falling back to TCP socket.\n");
- adb_thread_create(&thr, server_socket_thread, arg);
- return 0;
- }
- for(;;) {
- /*
- * Wait till the host creates a new connection.
- */
- /* Send the 'accept' request. */
- res = adb_write(fd, _accept_req, strlen(_accept_req));
- if ((size_t)res == strlen(_accept_req)) {
- /* Wait for the response. In the response we expect 'ok' on success,
- * or 'ko' on failure. */
- res = adb_read(fd, tmp, sizeof(tmp));
- if (res != 2 || memcmp(tmp, _ok_resp, 2)) {
- D("Accepting ADB host connection has failed.\n");
- adb_close(fd);
- } else {
- /* Host is connected. Register the transport, and start the
- * exchange. */
- register_socket_transport(fd, "host", port, 1);
- adb_write(fd, _start_req, strlen(_start_req));
- }
- /* Prepare for accepting of the next ADB host connection. */
- fd = qemu_pipe_open(con_name);
- if (fd < 0) {
- D("adb service become unavailable.\n");
- return 0;
- }
- } else {
- D("Unable to send the '%s' request to ADB service.\n", _accept_req);
- return 0;
- }
- }
- D("transport: qemu_socket_thread() exiting\n");
- return 0;
- }
- #endif // !ADB_HOST
- void local_init(int port)
- {
- adb_thread_t thr;
- void* (*func)(void *);
- if(HOST) {
- func = client_socket_thread;
- } else {
- #if ADB_HOST
- func = server_socket_thread;
- #else
- /* For the adbd daemon in the system image we need to distinguish
- * between the device, and the emulator. */
- char is_qemu[PROPERTY_VALUE_MAX];
- property_get("ro.kernel.qemu", is_qemu, "");
- if (!strcmp(is_qemu, "1")) {
- /* Running inside the emulator: use QEMUD pipe as the transport. */
- func = qemu_socket_thread;
- } else {
- /* Running inside the device: use TCP socket as the transport. */
- func = server_socket_thread;
- }
- #endif // !ADB_HOST
- }
- D("transport: local %s init\n", HOST ? "client" : "server");
- if(adb_thread_create(&thr, func, (void *)port)) {
- fatal_errno("cannot create local socket %s thread",
- HOST ? "client" : "server");
- }
- }
- static void remote_kick(atransport *t)
- {
- int fd = t->sfd;
- t->sfd = -1;
- adb_shutdown(fd);
- adb_close(fd);
- #if ADB_HOST
- if(HOST) {
- int nn;
- adb_mutex_lock( &local_transports_lock );
- for (nn = 0; nn < ADB_LOCAL_TRANSPORT_MAX; nn++) {
- if (local_transports[nn] == t) {
- local_transports[nn] = NULL;
- break;
- }
- }
- adb_mutex_unlock( &local_transports_lock );
- }
- #endif
- }
- static void remote_close(atransport *t)
- {
- adb_close(t->fd);
- }
- #if ADB_HOST
- /* Only call this function if you already hold local_transports_lock. */
- atransport* find_emulator_transport_by_adb_port_locked(int adb_port)
- {
- int i;
- for (i = 0; i < ADB_LOCAL_TRANSPORT_MAX; i++) {
- if (local_transports[i] && local_transports[i]->adb_port == adb_port) {
- return local_transports[i];
- }
- }
- return NULL;
- }
- atransport* find_emulator_transport_by_adb_port(int adb_port)
- {
- adb_mutex_lock( &local_transports_lock );
- atransport* result = find_emulator_transport_by_adb_port_locked(adb_port);
- adb_mutex_unlock( &local_transports_lock );
- return result;
- }
- /* Only call this function if you already hold local_transports_lock. */
- int get_available_local_transport_index_locked()
- {
- int i;
- for (i = 0; i < ADB_LOCAL_TRANSPORT_MAX; i++) {
- if (local_transports[i] == NULL) {
- return i;
- }
- }
- return -1;
- }
- int get_available_local_transport_index()
- {
- adb_mutex_lock( &local_transports_lock );
- int result = get_available_local_transport_index_locked();
- adb_mutex_unlock( &local_transports_lock );
- return result;
- }
- #endif
- int init_socket_transport(atransport *t, int s, int adb_port, int local)
- {
- int fail = 0;
- t->kick = remote_kick;
- t->close = remote_close;
- t->read_from_remote = remote_read;
- t->write_to_remote = remote_write;
- t->sfd = s;
- t->sync_token = 1;
- t->connection_state = CS_OFFLINE;
- t->type = kTransportLocal;
- t->adb_port = 0;
- #if ADB_HOST
- if (HOST && local) {
- adb_mutex_lock( &local_transports_lock );
- {
- t->adb_port = adb_port;
- atransport* existing_transport =
- find_emulator_transport_by_adb_port_locked(adb_port);
- int index = get_available_local_transport_index_locked();
- if (existing_transport != NULL) {
- D("local transport for port %d already registered (%p)?\n",
- adb_port, existing_transport);
- fail = -1;
- } else if (index < 0) {
- // Too many emulators.
- D("cannot register more emulators. Maximum is %d\n",
- ADB_LOCAL_TRANSPORT_MAX);
- fail = -1;
- } else {
- local_transports[index] = t;
- }
- }
- adb_mutex_unlock( &local_transports_lock );
- }
- #endif
- return fail;
- }
|