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New method of communication

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Introduce a new communication method between Magisk and Magisk Manager.

Magisk used to hardcode classnames and send broadcast/start activities to
specific components. This new method makes no assumption of any class names,
so Magisk Manager can easily be fully obfuscated.

In addition, the new method connects Magisk and Magisk Manager with random
abstract Linux sockets instead of socket files in filesystems, bypassing
file system complexities (selinux, permissions and such)
This commit is contained in:
topjohnwu
2018-09-16 04:16:18 -04:00
parent 4cf8d41f6a
commit 906b4aad9e
21 changed files with 655 additions and 705 deletions
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native/jni/core/daemon.c
+5 -5
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@@ -111,9 +111,9 @@ void main_daemon() {
check_and_start_logger();
struct sockaddr_un sun;
fd = setup_socket(&sun, MAIN_DAEMON);
if (xbind(fd, (struct sockaddr*) &sun, sizeof(sun.sun_family) + strlen(sun.sun_path + 1) + 1))
socklen_t len = setup_sockaddr(&sun, MAIN_DAEMON);
fd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (xbind(fd, (struct sockaddr*) &sun, len))
exit(1);
xlisten(fd, 10);
LOGI("Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") daemon started\n");
@@ -148,8 +148,8 @@ void main_daemon() {
/* Connect the daemon, set sockfd, and return if new daemon is spawned */
int connect_daemon2(daemon_t d, int *sockfd) {
struct sockaddr_un sun;
*sockfd = setup_socket(&sun, d);
socklen_t len = sizeof(sun.sun_family) + strlen(sun.sun_path + 1) + 1;
socklen_t len = setup_sockaddr(&sun, d);
*sockfd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (connect(*sockfd, (struct sockaddr*) &sun, len)) {
if (getuid() != UID_ROOT || getgid() != UID_ROOT) {
fprintf(stderr, "No daemon is currently running!\n");