/*
* 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 __ppc__
#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, transport 0 is bound to 5555,
* transport 1 to 5557, .. transport n to 5555 + n*2. 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 __ppc__
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 __ppc__
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)
{
char buf[64];
int fd = -1;
#if ADB_HOST
const char *host = getenv("ADBHOST");
if (host) {
fd = socket_network_client(host, port, SOCK_STREAM);
}
#endif
if (fd < 0) {
fd = socket_loopback_client(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, port - 1);
register_socket_transport(fd, buf, port);
return 0;
}
return -1;
}
static void *client_socket_thread(void *x)
{
#if ADB_HOST
int port = 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 *x)
{
int serverfd, fd;
struct sockaddr addr;
socklen_t alen;
D("transport: server_socket_thread() starting\n");
serverfd = -1;
for(;;) {
if(serverfd == -1) {
serverfd = socket_inaddr_any_server(ADB_LOCAL_TRANSPORT_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", ADB_LOCAL_TRANSPORT_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",ADB_LOCAL_TRANSPORT_PORT);
}
}
D("transport: server_socket_thread() exiting\n");
return 0;
}
void local_init(void)
{
adb_thread_t thr;
void* (*func)(void *);
if(HOST) {
func = client_socket_thread;
} else {
func = server_socket_thread;
}
D("transport: local %s init\n", HOST ? "client" : "server");
if(adb_thread_create(&thr, func, 0)) {
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_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);
}
int init_socket_transport(atransport *t, int s, int port)
{
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;
#if ADB_HOST
if (HOST) {
adb_mutex_lock( &local_transports_lock );
{
int index = (port - ADB_LOCAL_TRANSPORT_PORT)/2;
if (!(port & 1) || index < 0 || index >= ADB_LOCAL_TRANSPORT_MAX) {
D("bad local transport port number: %d\n", port);
fail = -1;
}
else if (local_transports[index] != NULL) {
D("local transport for port %d already registered (%p)?\n",
port, local_transports[index]);
fail = -1;
}
else
local_transports[index] = t;
}
adb_mutex_unlock( &local_transports_lock );
}
#endif
return fail;
}