diff options
Diffstat (limited to 'adb/services.cpp')
| -rw-r--r-- | adb/services.cpp | 727 |
1 files changed, 727 insertions, 0 deletions
diff --git a/adb/services.cpp b/adb/services.cpp new file mode 100644 index 0000000..e6c84a4 --- /dev/null +++ b/adb/services.cpp @@ -0,0 +1,727 @@ +/* + * 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_SERVICES + +#include "sysdeps.h" + +#include <errno.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#ifndef _WIN32 +#include <netdb.h> +#include <netinet/in.h> +#include <sys/ioctl.h> +#include <unistd.h> +#endif + +#include <base/stringprintf.h> + +#if !ADB_HOST +#include "base/file.h" +#include "cutils/android_reboot.h" +#include "cutils/properties.h" +#endif + +#include "adb.h" +#include "adb_io.h" +#include "file_sync_service.h" +#include "remount_service.h" +#include "transport.h" + +struct stinfo { + void (*func)(int fd, void *cookie); + int fd; + void *cookie; +}; + + +void *service_bootstrap_func(void *x) +{ + stinfo* sti = reinterpret_cast<stinfo*>(x); + sti->func(sti->fd, sti->cookie); + free(sti); + return 0; +} + +#if !ADB_HOST + +void restart_root_service(int fd, void *cookie) +{ + char buf[100]; + char value[PROPERTY_VALUE_MAX]; + + if (getuid() == 0) { + snprintf(buf, sizeof(buf), "adbd is already running as root\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); + } else { + property_get("ro.debuggable", value, ""); + if (strcmp(value, "1") != 0) { + snprintf(buf, sizeof(buf), "adbd cannot run as root in production builds\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); + return; + } + + property_set("service.adb.root", "1"); + snprintf(buf, sizeof(buf), "restarting adbd as root\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); + } +} + +void restart_unroot_service(int fd, void *cookie) +{ + char buf[100]; + + if (getuid() != 0) { + snprintf(buf, sizeof(buf), "adbd not running as root\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); + } else { + property_set("service.adb.root", "0"); + snprintf(buf, sizeof(buf), "restarting adbd as non root\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); + } +} + +void restart_tcp_service(int fd, void *cookie) +{ + char buf[100]; + char value[PROPERTY_VALUE_MAX]; + int port = (int) (uintptr_t) cookie; + + if (port <= 0) { + snprintf(buf, sizeof(buf), "invalid port\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); + return; + } + + snprintf(value, sizeof(value), "%d", port); + property_set("service.adb.tcp.port", value); + snprintf(buf, sizeof(buf), "restarting in TCP mode port: %d\n", port); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); +} + +void restart_usb_service(int fd, void *cookie) +{ + char buf[100]; + + property_set("service.adb.tcp.port", "0"); + snprintf(buf, sizeof(buf), "restarting in USB mode\n"); + WriteFdExactly(fd, buf, strlen(buf)); + adb_close(fd); +} + +static bool reboot_service_impl(int fd, const char* arg) { + const char* reboot_arg = arg; + bool auto_reboot = false; + + if (strcmp(reboot_arg, "sideload-auto-reboot") == 0) { + auto_reboot = true; + reboot_arg = "sideload"; + } + + char buf[100]; + // It reboots into sideload mode by setting "--sideload" or "--sideload_auto_reboot" + // in the command file. + if (strcmp(reboot_arg, "sideload") == 0) { + if (getuid() != 0) { + snprintf(buf, sizeof(buf), "'adb root' is required for 'adb reboot sideload'.\n"); + WriteStringFully(fd, buf); + return false; + } + + const char* const recovery_dir = "/cache/recovery"; + const char* const command_file = "/cache/recovery/command"; + // Ensure /cache/recovery exists. + if (adb_mkdir(recovery_dir, 0770) == -1 && errno != EEXIST) { + D("Failed to create directory '%s': %s\n", recovery_dir, strerror(errno)); + return false; + } + + bool write_status = android::base::WriteStringToFile( + auto_reboot ? "--sideload_auto_reboot" : "--sideload", command_file); + if (!write_status) { + return false; + } + + reboot_arg = "recovery"; + } + + sync(); + + char property_val[PROPERTY_VALUE_MAX]; + int ret = snprintf(property_val, sizeof(property_val), "reboot,%s", reboot_arg); + if (ret >= static_cast<int>(sizeof(property_val))) { + snprintf(buf, sizeof(buf), "reboot string too long. length=%d\n", ret); + WriteStringFully(fd, buf); + return false; + } + + ret = property_set(ANDROID_RB_PROPERTY, property_val); + if (ret < 0) { + snprintf(buf, sizeof(buf), "reboot failed: %d\n", ret); + WriteStringFully(fd, buf); + return false; + } + + return true; +} + +void reboot_service(int fd, void* arg) +{ + if (reboot_service_impl(fd, static_cast<const char*>(arg))) { + // Don't return early. Give the reboot command time to take effect + // to avoid messing up scripts which do "adb reboot && adb wait-for-device" + while (true) { + pause(); + } + } + + free(arg); + adb_close(fd); +} + +void reverse_service(int fd, void* arg) +{ + const char* command = reinterpret_cast<const char*>(arg); + + if (handle_forward_request(command, kTransportAny, NULL, fd) < 0) { + sendfailmsg(fd, "not a reverse forwarding command"); + } + free(arg); + adb_close(fd); +} + +#endif + +static int create_service_thread(void (*func)(int, void *), void *cookie) +{ + int s[2]; + if (adb_socketpair(s)) { + printf("cannot create service socket pair\n"); + return -1; + } + D("socketpair: (%d,%d)", s[0], s[1]); + + stinfo* sti = reinterpret_cast<stinfo*>(malloc(sizeof(stinfo))); + if (sti == nullptr) { + fatal("cannot allocate stinfo"); + } + sti->func = func; + sti->cookie = cookie; + sti->fd = s[1]; + + adb_thread_t t; + if (adb_thread_create(&t, service_bootstrap_func, sti)) { + free(sti); + adb_close(s[0]); + adb_close(s[1]); + printf("cannot create service thread\n"); + return -1; + } + + D("service thread started, %d:%d\n",s[0], s[1]); + return s[0]; +} + +#if !ADB_HOST + +static void init_subproc_child() +{ + setsid(); + + // Set OOM score adjustment to prevent killing + int fd = adb_open("/proc/self/oom_score_adj", O_WRONLY | O_CLOEXEC); + if (fd >= 0) { + adb_write(fd, "0", 1); + adb_close(fd); + } else { + D("adb: unable to update oom_score_adj\n"); + } +} + +static int create_subproc_pty(const char *cmd, const char *arg0, const char *arg1, pid_t *pid) +{ + D("create_subproc_pty(cmd=%s, arg0=%s, arg1=%s)\n", cmd, arg0, arg1); +#if defined(_WIN32) + fprintf(stderr, "error: create_subproc_pty not implemented on Win32 (%s %s %s)\n", cmd, arg0, arg1); + return -1; +#else + int ptm; + + ptm = unix_open("/dev/ptmx", O_RDWR | O_CLOEXEC); // | O_NOCTTY); + if(ptm < 0){ + printf("[ cannot open /dev/ptmx - %s ]\n",strerror(errno)); + return -1; + } + + char devname[64]; + if(grantpt(ptm) || unlockpt(ptm) || ptsname_r(ptm, devname, sizeof(devname)) != 0) { + printf("[ trouble with /dev/ptmx - %s ]\n", strerror(errno)); + adb_close(ptm); + return -1; + } + + *pid = fork(); + if(*pid < 0) { + printf("- fork failed: %s -\n", strerror(errno)); + adb_close(ptm); + return -1; + } + + if (*pid == 0) { + init_subproc_child(); + + int pts = unix_open(devname, O_RDWR | O_CLOEXEC); + if (pts < 0) { + fprintf(stderr, "child failed to open pseudo-term slave: %s\n", devname); + exit(-1); + } + + dup2(pts, STDIN_FILENO); + dup2(pts, STDOUT_FILENO); + dup2(pts, STDERR_FILENO); + + adb_close(pts); + adb_close(ptm); + + execl(cmd, cmd, arg0, arg1, NULL); + fprintf(stderr, "- exec '%s' failed: %s (%d) -\n", + cmd, strerror(errno), errno); + exit(-1); + } else { + return ptm; + } +#endif /* !defined(_WIN32) */ +} + +static int create_subproc_raw(const char *cmd, const char *arg0, const char *arg1, pid_t *pid) +{ + D("create_subproc_raw(cmd=%s, arg0=%s, arg1=%s)\n", cmd, arg0, arg1); +#if defined(_WIN32) + fprintf(stderr, "error: create_subproc_raw not implemented on Win32 (%s %s %s)\n", cmd, arg0, arg1); + return -1; +#else + + // 0 is parent socket, 1 is child socket + int sv[2]; + if (adb_socketpair(sv) < 0) { + printf("[ cannot create socket pair - %s ]\n", strerror(errno)); + return -1; + } + D("socketpair: (%d,%d)", sv[0], sv[1]); + + *pid = fork(); + if (*pid < 0) { + printf("- fork failed: %s -\n", strerror(errno)); + adb_close(sv[0]); + adb_close(sv[1]); + return -1; + } + + if (*pid == 0) { + adb_close(sv[0]); + init_subproc_child(); + + dup2(sv[1], STDIN_FILENO); + dup2(sv[1], STDOUT_FILENO); + dup2(sv[1], STDERR_FILENO); + + adb_close(sv[1]); + + execl(cmd, cmd, arg0, arg1, NULL); + fprintf(stderr, "- exec '%s' failed: %s (%d) -\n", + cmd, strerror(errno), errno); + exit(-1); + } else { + adb_close(sv[1]); + return sv[0]; + } +#endif /* !defined(_WIN32) */ +} +#endif /* !ABD_HOST */ + +#if ADB_HOST +#define SHELL_COMMAND "/bin/sh" +#else +#define SHELL_COMMAND "/system/bin/sh" +#endif + +#if !ADB_HOST +static void subproc_waiter_service(int fd, void *cookie) +{ + pid_t pid = (pid_t) (uintptr_t) cookie; + + D("entered. fd=%d of pid=%d\n", fd, pid); + while (true) { + int status; + pid_t p = waitpid(pid, &status, 0); + if (p == pid) { + D("fd=%d, post waitpid(pid=%d) status=%04x\n", fd, p, status); + if (WIFSIGNALED(status)) { + D("*** Killed by signal %d\n", WTERMSIG(status)); + break; + } else if (!WIFEXITED(status)) { + D("*** Didn't exit!!. status %d\n", status); + break; + } else if (WEXITSTATUS(status) >= 0) { + D("*** Exit code %d\n", WEXITSTATUS(status)); + break; + } + } + } + D("shell exited fd=%d of pid=%d err=%d\n", fd, pid, errno); + if (SHELL_EXIT_NOTIFY_FD >=0) { + int res; + res = WriteFdExactly(SHELL_EXIT_NOTIFY_FD, &fd, sizeof(fd)) ? 0 : -1; + D("notified shell exit via fd=%d for pid=%d res=%d errno=%d\n", + SHELL_EXIT_NOTIFY_FD, pid, res, errno); + } +} + +static int create_subproc_thread(const char *name, const subproc_mode mode) +{ + adb_thread_t t; + int ret_fd; + pid_t pid = -1; + + const char *arg0, *arg1; + if (name == 0 || *name == 0) { + arg0 = "-"; arg1 = 0; + } else { + arg0 = "-c"; arg1 = name; + } + + switch (mode) { + case SUBPROC_PTY: + ret_fd = create_subproc_pty(SHELL_COMMAND, arg0, arg1, &pid); + break; + case SUBPROC_RAW: + ret_fd = create_subproc_raw(SHELL_COMMAND, arg0, arg1, &pid); + break; + default: + fprintf(stderr, "invalid subproc_mode %d\n", mode); + return -1; + } + D("create_subproc ret_fd=%d pid=%d\n", ret_fd, pid); + + stinfo* sti = reinterpret_cast<stinfo*>(malloc(sizeof(stinfo))); + if(sti == 0) fatal("cannot allocate stinfo"); + sti->func = subproc_waiter_service; + sti->cookie = (void*) (uintptr_t) pid; + sti->fd = ret_fd; + + if (adb_thread_create(&t, service_bootstrap_func, sti)) { + free(sti); + adb_close(ret_fd); + fprintf(stderr, "cannot create service thread\n"); + return -1; + } + + D("service thread started, fd=%d pid=%d\n", ret_fd, pid); + return ret_fd; +} +#endif + +int service_to_fd(const char *name) +{ + int ret = -1; + + if(!strncmp(name, "tcp:", 4)) { + int port = atoi(name + 4); + name = strchr(name + 4, ':'); + if(name == 0) { + ret = socket_loopback_client(port, SOCK_STREAM); + if (ret >= 0) + disable_tcp_nagle(ret); + } else { +#if ADB_HOST + ret = socket_network_client(name + 1, port, SOCK_STREAM); +#else + return -1; +#endif + } +#ifndef HAVE_WINSOCK /* winsock doesn't implement unix domain sockets */ + } else if(!strncmp(name, "local:", 6)) { + ret = socket_local_client(name + 6, + ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM); + } else if(!strncmp(name, "localreserved:", 14)) { + ret = socket_local_client(name + 14, + ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM); + } else if(!strncmp(name, "localabstract:", 14)) { + ret = socket_local_client(name + 14, + ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM); + } else if(!strncmp(name, "localfilesystem:", 16)) { + ret = socket_local_client(name + 16, + ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM); +#endif +#if !ADB_HOST + } else if(!strncmp("dev:", name, 4)) { + ret = unix_open(name + 4, O_RDWR | O_CLOEXEC); + } else if(!strncmp(name, "framebuffer:", 12)) { + ret = create_service_thread(framebuffer_service, 0); + } else if (!strncmp(name, "jdwp:", 5)) { + ret = create_jdwp_connection_fd(atoi(name+5)); + } else if(!HOST && !strncmp(name, "shell:", 6)) { + ret = create_subproc_thread(name + 6, SUBPROC_PTY); + } else if(!HOST && !strncmp(name, "exec:", 5)) { + ret = create_subproc_thread(name + 5, SUBPROC_RAW); + } else if(!strncmp(name, "sync:", 5)) { + ret = create_service_thread(file_sync_service, NULL); + } else if(!strncmp(name, "remount:", 8)) { + ret = create_service_thread(remount_service, NULL); + } else if(!strncmp(name, "reboot:", 7)) { + void* arg = strdup(name + 7); + if (arg == NULL) return -1; + ret = create_service_thread(reboot_service, arg); + } else if(!strncmp(name, "root:", 5)) { + ret = create_service_thread(restart_root_service, NULL); + } else if(!strncmp(name, "unroot:", 7)) { + ret = create_service_thread(restart_unroot_service, NULL); + } else if(!strncmp(name, "backup:", 7)) { + ret = create_subproc_thread(android::base::StringPrintf("/system/bin/bu backup %s", + (name + 7)).c_str(), SUBPROC_RAW); + } else if(!strncmp(name, "restore:", 8)) { + ret = create_subproc_thread("/system/bin/bu restore", SUBPROC_RAW); + } else if(!strncmp(name, "tcpip:", 6)) { + int port; + if (sscanf(name + 6, "%d", &port) != 1) { + port = 0; + } + ret = create_service_thread(restart_tcp_service, (void *) (uintptr_t) port); + } else if(!strncmp(name, "usb:", 4)) { + ret = create_service_thread(restart_usb_service, NULL); + } else if (!strncmp(name, "reverse:", 8)) { + char* cookie = strdup(name + 8); + if (cookie == NULL) { + ret = -1; + } else { + ret = create_service_thread(reverse_service, cookie); + if (ret < 0) { + free(cookie); + } + } + } else if(!strncmp(name, "disable-verity:", 15)) { + ret = create_service_thread(set_verity_enabled_state_service, (void*)0); + } else if(!strncmp(name, "enable-verity:", 15)) { + ret = create_service_thread(set_verity_enabled_state_service, (void*)1); +#endif + } + if (ret >= 0) { + close_on_exec(ret); + } + return ret; +} + +#if ADB_HOST +struct state_info { + transport_type transport; + char* serial; + int state; +}; + +static void wait_for_state(int fd, void* cookie) +{ + state_info* sinfo = reinterpret_cast<state_info*>(cookie); + + D("wait_for_state %d\n", sinfo->state); + + std::string error_msg = "unknown error"; + atransport* t = acquire_one_transport(sinfo->state, sinfo->transport, sinfo->serial, &error_msg); + if (t != 0) { + WriteFdExactly(fd, "OKAY", 4); + } else { + sendfailmsg(fd, error_msg.c_str()); + } + + if (sinfo->serial) + free(sinfo->serial); + free(sinfo); + adb_close(fd); + D("wait_for_state is done\n"); +} + +static void 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; + } + // zero terminate the host at the point we found the colon + hostbuf[portstr - host] = 0; + if (sscanf(portstr + 1, "%d", &port) != 1) { + snprintf(buffer, buffer_size, "bad port number %s", portstr); + return; + } + } 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; + } + + D("client: connected on remote on fd %d\n", fd); + close_on_exec(fd); + disable_tcp_nagle(fd); + + ret = register_socket_transport(fd, serial, port, 0); + if (ret < 0) { + adb_close(fd); + snprintf(buffer, buffer_size, "already connected to %s", serial); + } else { + snprintf(buffer, buffer_size, "connected to %s", serial); + } +} + +void connect_emulator(char* port_spec, char* buffer, int buffer_size) +{ + char* port_separator = strchr(port_spec, ','); + if (!port_separator) { + snprintf(buffer, buffer_size, + "unable to parse '%s' as <console port>,<adb port>", + port_spec); + return; + } + + // Zero-terminate console port and make port_separator point to 2nd port. + *port_separator++ = 0; + int console_port = strtol(port_spec, NULL, 0); + int adb_port = strtol(port_separator, NULL, 0); + if (!(console_port > 0 && adb_port > 0)) { + *(port_separator - 1) = ','; + snprintf(buffer, buffer_size, + "Invalid port numbers: Expected positive numbers, got '%s'", + port_spec); + return; + } + + /* Check if the emulator is already known. + * Note: There's a small but harmless race condition here: An emulator not + * present just yet could be registered by another invocation right + * after doing this check here. However, local_connect protects + * against double-registration too. From here, a better error message + * can be produced. In the case of the race condition, the very specific + * error message won't be shown, but the data doesn't get corrupted. */ + atransport* known_emulator = find_emulator_transport_by_adb_port(adb_port); + if (known_emulator != NULL) { + snprintf(buffer, buffer_size, + "Emulator on port %d already registered.", adb_port); + return; + } + + /* Check if more emulators can be registered. Similar unproblematic + * race condition as above. */ + int candidate_slot = get_available_local_transport_index(); + if (candidate_slot < 0) { + snprintf(buffer, buffer_size, "Cannot accept more emulators."); + return; + } + + /* Preconditions met, try to connect to the emulator. */ + if (!local_connect_arbitrary_ports(console_port, adb_port)) { + snprintf(buffer, buffer_size, + "Connected to emulator on ports %d,%d", console_port, adb_port); + } else { + snprintf(buffer, buffer_size, + "Could not connect to emulator on ports %d,%d", + console_port, adb_port); + } +} + +static void connect_service(int fd, void* cookie) +{ + char buf[4096]; + char resp[4096]; + char *host = reinterpret_cast<char*>(cookie); + + if (!strncmp(host, "emu:", 4)) { + connect_emulator(host + 4, buf, sizeof(buf)); + } else { + connect_device(host, buf, sizeof(buf)); + } + + // Send response for emulator and device + snprintf(resp, sizeof(resp), "%04x%s",(unsigned)strlen(buf), buf); + WriteFdExactly(fd, resp, strlen(resp)); + adb_close(fd); +} +#endif + +#if ADB_HOST +asocket* host_service_to_socket(const char* name, const char *serial) +{ + if (!strcmp(name,"track-devices")) { + return create_device_tracker(); + } else if (!strncmp(name, "wait-for-", strlen("wait-for-"))) { + auto sinfo = reinterpret_cast<state_info*>(malloc(sizeof(state_info))); + if (sinfo == nullptr) { + fprintf(stderr, "couldn't allocate state_info: %s", strerror(errno)); + return NULL; + } + + if (serial) + sinfo->serial = strdup(serial); + else + sinfo->serial = NULL; + + name += strlen("wait-for-"); + + if (!strncmp(name, "local", strlen("local"))) { + sinfo->transport = kTransportLocal; + sinfo->state = CS_DEVICE; + } else if (!strncmp(name, "usb", strlen("usb"))) { + sinfo->transport = kTransportUsb; + sinfo->state = CS_DEVICE; + } else if (!strncmp(name, "any", strlen("any"))) { + sinfo->transport = kTransportAny; + sinfo->state = CS_DEVICE; + } else { + free(sinfo); + return NULL; + } + + int fd = create_service_thread(wait_for_state, sinfo); + return create_local_socket(fd); + } else if (!strncmp(name, "connect:", 8)) { + const char *host = name + 8; + int fd = create_service_thread(connect_service, (void *)host); + return create_local_socket(fd); + } + return NULL; +} +#endif /* ADB_HOST */ |