/*
* 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.
*/
#define TRACE_TAG TRACE_ADB
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include "sysdeps.h"
#include "adb.h"
#include <private/android_filesystem_config.h>
#include <linux/capability.h>
#include <linux/prctl.h>
#if ADB_TRACE
ADB_MUTEX_DEFINE( D_lock );
#endif
int HOST = 0;
static const char *adb_device_banner = "sideload";
char ADB_SIDELOAD_FILENAME[255];
void fatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "error: ");
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
exit(-1);
}
void fatal_errno(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "error: %s: ", strerror(errno));
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
exit(-1);
}
int adb_trace_mask;
/* read a comma/space/colum/semi-column separated list of tags
* from the ADB_TRACE environment variable and build the trace
* mask from it. note that '1' and 'all' are special cases to
* enable all tracing
*/
void adb_trace_init(void)
{
const char* p = getenv("ADB_TRACE");
const char* q;
static const struct {
const char* tag;
int flag;
} tags[] = {
{ "1", 0 },
{ "all", 0 },
{ "adb", TRACE_ADB },
{ "sockets", TRACE_SOCKETS },
{ "packets", TRACE_PACKETS },
{ "rwx", TRACE_RWX },
{ "usb", TRACE_USB },
{ "sync", TRACE_SYNC },
{ "sysdeps", TRACE_SYSDEPS },
{ "transport", TRACE_TRANSPORT },
{ "jdwp", TRACE_JDWP },
{ "services", TRACE_SERVICES },
{ NULL, 0 }
};
if (p == NULL)
return;
/* use a comma/column/semi-colum/space separated list */
while (*p) {
int len, tagn;
q = strpbrk(p, " ,:;");
if (q == NULL) {
q = p + strlen(p);
}
len = q - p;
for (tagn = 0; tags[tagn].tag != NULL; tagn++)
{
int taglen = strlen(tags[tagn].tag);
if (len == taglen && !memcmp(tags[tagn].tag, p, len) )
{
int flag = tags[tagn].flag;
if (flag == 0) {
adb_trace_mask = ~0;
return;
}
adb_trace_mask |= (1 << flag);
break;
}
}
p = q;
if (*p)
p++;
}
}
apacket *get_apacket(void)
{
apacket *p = malloc(sizeof(apacket));
if(p == 0) fatal("failed to allocate an apacket");
memset(p, 0, sizeof(apacket) - MAX_PAYLOAD);
return p;
}
void put_apacket(apacket *p)
{
free(p);
}
void handle_online(void)
{
D("adb: online\n");
}
void handle_offline(atransport *t)
{
D("adb: offline\n");
//Close the associated usb
run_transport_disconnects(t);
}
#if TRACE_PACKETS
#define DUMPMAX 32
void print_packet(const char *label, apacket *p)
{
char *tag;
char *x;
unsigned count;
switch(p->msg.command){
case A_SYNC: tag = "SYNC"; break;
case A_CNXN: tag = "CNXN" ; break;
case A_OPEN: tag = "OPEN"; break;
case A_OKAY: tag = "OKAY"; break;
case A_CLSE: tag = "CLSE"; break;
case A_WRTE: tag = "WRTE"; break;
default: tag = "????"; break;
}
fprintf(stderr, "%s: %s %08x %08x %04x \"",
label, tag, p->msg.arg0, p->msg.arg1, p->msg.data_length);
count = p->msg.data_length;
x = (char*) p->data;
if(count > DUMPMAX) {
count = DUMPMAX;
tag = "\n";
} else {
tag = "\"\n";
}
while(count-- > 0){
if((*x >= ' ') && (*x < 127)) {
fputc(*x, stderr);
} else {
fputc('.', stderr);
}
x++;
}
fprintf(stderr, tag);
}
#endif
static void send_ready(unsigned local, unsigned remote, atransport *t)
{
D("Calling send_ready \n");
apacket *p = get_apacket();
p->msg.command = A_OKAY;
p->msg.arg0 = local;
p->msg.arg1 = remote;
send_packet(p, t);
}
static void send_close(unsigned local, unsigned remote, atransport *t)
{
D("Calling send_close \n");
apacket *p = get_apacket();
p->msg.command = A_CLSE;
p->msg.arg0 = local;
p->msg.arg1 = remote;
send_packet(p, t);
}
static void send_connect(atransport *t)
{
D("Calling send_connect \n");
apacket *cp = get_apacket();
cp->msg.command = A_CNXN;
cp->msg.arg0 = A_VERSION;
cp->msg.arg1 = MAX_PAYLOAD;
snprintf((char*) cp->data, sizeof cp->data, "%s::",
HOST ? "host" : adb_device_banner);
cp->msg.data_length = strlen((char*) cp->data) + 1;
send_packet(cp, t);
}
void parse_banner(char *banner, atransport *t)
{
char *type, *product, *end;
D("parse_banner: %s\n", banner);
type = banner;
product = strchr(type, ':');
if(product) {
*product++ = 0;
} else {
product = "";
}
/* remove trailing ':' */
end = strchr(product, ':');
if(end) *end = 0;
/* save product name in device structure */
if (t->product == NULL) {
t->product = strdup(product);
} else if (strcmp(product, t->product) != 0) {
free(t->product);
t->product = strdup(product);
}
if(!strcmp(type, "bootloader")){
D("setting connection_state to CS_BOOTLOADER\n");
t->connection_state = CS_BOOTLOADER;
update_transports();
return;
}
if(!strcmp(type, "device")) {
D("setting connection_state to CS_DEVICE\n");
t->connection_state = CS_DEVICE;
update_transports();
return;
}
if(!strcmp(type, "recovery")) {
D("setting connection_state to CS_RECOVERY\n");
t->connection_state = CS_RECOVERY;
update_transports();
return;
}
if(!strcmp(type, "sideload")) {
D("setting connection_state to CS_SIDELOAD\n");
t->connection_state = CS_SIDELOAD;
update_transports();
return;
}
t->connection_state = CS_HOST;
}
void handle_packet(apacket *p, atransport *t)
{
asocket *s;
D("handle_packet() %c%c%c%c\n", ((char*) (&(p->msg.command)))[0],
((char*) (&(p->msg.command)))[1],
((char*) (&(p->msg.command)))[2],
((char*) (&(p->msg.command)))[3]);
print_packet("recv", p);
switch(p->msg.command){
case A_SYNC:
if(p->msg.arg0){
send_packet(p, t);
if(HOST) send_connect(t);
} else {
t->connection_state = CS_OFFLINE;
handle_offline(t);
send_packet(p, t);
}
return;
case A_CNXN: /* CONNECT(version, maxdata, "system-id-string") */
/* XXX verify version, etc */
if(t->connection_state != CS_OFFLINE) {
t->connection_state = CS_OFFLINE;
handle_offline(t);
}
parse_banner((char*) p->data, t);
handle_online();
if(!HOST) send_connect(t);
break;
case A_OPEN: /* OPEN(local-id, 0, "destination") */
if(t->connection_state != CS_OFFLINE) {
char *name = (char*) p->data;
name[p->msg.data_length > 0 ? p->msg.data_length - 1 : 0] = 0;
s = create_local_service_socket(name);
if(s == 0) {
send_close(0, p->msg.arg0, t);
} else {
s->peer = create_remote_socket(p->msg.arg0, t);
s->peer->peer = s;
send_ready(s->id, s->peer->id, t);
s->ready(s);
}
}
break;
case A_OKAY: /* READY(local-id, remote-id, "") */
if(t->connection_state != CS_OFFLINE) {
if((s = find_local_socket(p->msg.arg1))) {
if(s->peer == 0) {
s->peer = create_remote_socket(p->msg.arg0, t);
s->peer->peer = s;
}
s->ready(s);
}
}
break;
case A_CLSE: /* CLOSE(local-id, remote-id, "") */
if(t->connection_state != CS_OFFLINE) {
if((s = find_local_socket(p->msg.arg1))) {
s->close(s);
}
}
break;
case A_WRTE:
if(t->connection_state != CS_OFFLINE) {
if((s = find_local_socket(p->msg.arg1))) {
unsigned rid = p->msg.arg0;
p->len = p->msg.data_length;
if(s->enqueue(s, p) == 0) {
D("Enqueue the socket\n");
send_ready(s->id, rid, t);
}
return;
}
}
break;
default:
printf("handle_packet: what is %08x?!\n", p->msg.command);
}
put_apacket(p);
}
static void adb_cleanup(void)
{
usb_cleanup();
}
int adb_main(const char* path)
{
strcpy(ADB_SIDELOAD_FILENAME, path);
atexit(adb_cleanup);
#if defined(HAVE_FORKEXEC)
// No SIGCHLD. Let the service subproc handle its children.
signal(SIGPIPE, SIG_IGN);
#endif
init_transport_registration();
// The minimal version of adbd only uses USB.
if (access("/dev/android_adb", F_OK) == 0) {
// listen on USB
usb_init();
}
/* Remove this so that perms work properly
if (setgid(AID_SHELL) != 0) {
fprintf(stderr, "failed to setgid to shell\n");
exit(1);
}
if (setuid(AID_SHELL) != 0) {
fprintf(stderr, "failed to setuid to shell\n");
exit(1);
}
fprintf(stderr, "userid is %d\n", getuid());
*/
D("Event loop starting\n");
fdevent_loop();
usb_cleanup();
return 0;
}
