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");
sdb_sleep_ms(1000);
continue;
}
close_on_exec(serverfd);
}
alen = sizeof(addr);
D("server: trying to get new connection from %d\n", port);
fd = sdb_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, NULL);
}
}
D("transport: server_socket_thread() exiting\n");
return 0;
}
int local_connect_arbitrary_ports(int console_port, int adb_port, std::string* error) {
int fd = -1;
#if ADB_HOST
if (find_emulator_transport_by_adb_port(adb_port) != nullptr) {
return -1;
}
const char *host = getenv("ADBHOST");
if (host) {
fd = network_connect(host, adb_port, SOCK_STREAM, 0, error);
}
#endif
if (fd < 0) {
fd = network_loopback_client(adb_port, SOCK_STREAM, error);
}
if (fd >= 0) {
D("client: connected on remote on fd %d", fd);
close_on_exec(fd);
disable_tcp_nagle(fd);
std::string serial = android::base::StringPrintf("emulator-%d", console_port);
if (register_socket_transport(fd, serial.c_str(), adb_port, 1) == 0) {
return 0;
}
adb_close(fd);
}
return -1;
}
int local_connect_arbitrary_ports(int console_port, int sdb_port, const char *device_name)
{
char buf[64];
int fd = -1;
#if SDB_HOST
const char *host = getenv("SDBHOST");
if (host) {
fd = socket_network_client(host, sdb_port, SOCK_STREAM);
}
#endif
if (fd < 0) {
fd = socket_loopback_client(sdb_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, sdb_port, 1, device_name);
return 0;
}
return -1;
}
static void connect_device(const std::string& address, std::string* response) {
if (address.empty()) {
*response = "empty address";
return;
}
std::string serial;
std::string host;
int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
if (!parse_host_and_port(address, &serial, &host, &port, response)) {
return;
}
std::string error;
int fd = network_connect(host.c_str(), port, SOCK_STREAM, 10, &error);
if (fd == -1) {
*response = android::base::StringPrintf("unable to connect to %s: %s",
serial.c_str(), error.c_str());
return;
}
D("client: connected %s remote on fd %d", serial.c_str(), fd);
close_on_exec(fd);
disable_tcp_nagle(fd);
int ret = register_socket_transport(fd, serial.c_str(), port, 0);
if (ret < 0) {
adb_close(fd);
*response = android::base::StringPrintf("already connected to %s", serial.c_str());
} else {
*response = android::base::StringPrintf("connected to %s", serial.c_str());
}
}
static void server_socket_thread(void* arg) {
int serverfd, fd;
sockaddr_storage ss;
sockaddr *addrp = reinterpret_cast<sockaddr*>(&ss);
socklen_t alen;
int port = (int) (uintptr_t) arg;
adb_thread_setname("server socket");
D("transport: server_socket_thread() starting");
serverfd = -1;
for(;;) {
if(serverfd == -1) {
std::string error;
serverfd = network_inaddr_any_server(port, SOCK_STREAM, &error);
if(serverfd < 0) {
D("server: cannot bind socket yet: %s", error.c_str());
adb_sleep_ms(1000);
continue;
}
close_on_exec(serverfd);
}
alen = sizeof(ss);
D("server: trying to get new connection from %d", port);
fd = adb_socket_accept(serverfd, addrp, &alen);
if(fd >= 0) {
D("server: new connection on fd %d", fd);
close_on_exec(fd);
disable_tcp_nagle(fd);
register_socket_transport(fd, "host", port, 1);
}
}
D("transport: server_socket_thread() exiting");
}
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, "emulator-%d", console_port);
register_socket_transport(fd, buf, adb_port, 1);
return 0;
}
return -1;
}
static void server_socket_thread(void* arg) {
int serverfd, fd;
int port = (int) (uintptr_t) arg;
adb_thread_setname("server socket");
D("transport: server_socket_thread() starting");
serverfd = -1;
for(;;) {
if(serverfd == -1) {
std::string error;
serverfd = network_inaddr_any_server(port, SOCK_STREAM, &error);
if(serverfd < 0) {
D("server: cannot bind socket yet: %s", error.c_str());
std::this_thread::sleep_for(1s);
continue;
}
close_on_exec(serverfd);
}
D("server: trying to get new connection from %d", port);
fd = adb_socket_accept(serverfd, nullptr, nullptr);
if(fd >= 0) {
D("server: new connection on fd %d", fd);
close_on_exec(fd);
disable_tcp_nagle(fd);
std::string serial = android::base::StringPrintf("host-%d", fd);
if (register_socket_transport(fd, serial.c_str(), port, 1) != 0) {
adb_close(fd);
}
}
}
D("transport: server_socket_thread() exiting");
}
static int connect_device(char* host, char* buffer, int buffer_size)
{
int port, fd;
char* portstr = strchr(host, ':');
char hostbuf[100];
char serial[100];
int ret;
strncpy(hostbuf, host, sizeof(hostbuf) - 1);
if (portstr) {
if (portstr - host >= (ptrdiff_t)sizeof(hostbuf)) {
snprintf(buffer, buffer_size, "bad host name %s", host);
return 0;
}
// zero terminate the host at the point we found the colon
hostbuf[portstr - host] = 0;
if (sscanf(portstr + 1, "%d", &port) == 0) {
snprintf(buffer, buffer_size, "bad port number %s", portstr);
return 0;
}
} else {
port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
}
snprintf(serial, sizeof(serial), "%s:%d", hostbuf, port);
fd = socket_network_client_timeout(hostbuf, port, SOCK_STREAM, 10);
if (fd < 0) {
snprintf(buffer, buffer_size, "unable to connect to %s:%d", host, port);
return 0;
}
D("client: connected on remote on fd %d\n", fd);
close_on_exec(fd);
disable_tcp_nagle(fd);
enable_keepalive(fd);
ret = register_socket_transport(fd, serial, port, 0);
if (ret < 0) {
adb_close(fd);
snprintf(buffer, buffer_size, "already connected to %s", serial);
return 0;
} else {
snprintf(buffer, buffer_size, "connected to %s", serial);
}
return 1;
}
static void connect_device(const std::string& host, std::string* response) {
if (host.empty()) {
*response = "empty host name";
return;
}
std::vector<std::string> pieces = android::base::Split(host, ":");
const std::string& hostname = pieces[0];
int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
if (pieces.size() > 1) {
if (sscanf(pieces[1].c_str(), "%d", &port) != 1) {
*response = android::base::StringPrintf("bad port number %s", pieces[1].c_str());
return;
}
}
// This may look like we're putting 'host' back together,
// but we're actually inserting the default port if necessary.
std::string serial = android::base::StringPrintf("%s:%d", hostname.c_str(), port);
int fd = socket_network_client_timeout(hostname.c_str(), port, SOCK_STREAM, 10);
if (fd < 0) {
*response = android::base::StringPrintf("unable to connect to %s:%d",
hostname.c_str(), port);
return;
}
D("client: connected on remote on fd %d\n", fd);
close_on_exec(fd);
disable_tcp_nagle(fd);
int ret = register_socket_transport(fd, serial.c_str(), port, 0);
if (ret < 0) {
adb_close(fd);
*response = android::base::StringPrintf("already connected to %s", serial.c_str());
} else {
*response = android::base::StringPrintf("connected to %s", serial.c_str());
}
}
/* 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) (uintptr_t) 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. */
D("adb service is not available. Falling back to TCP socket.\n");
adb_thread_create(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;
}
