mirror of
http://galexander.org/git/simplesshd.git
synced 2024-12-29 09:28:07 +00:00
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <jni.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
const char *conf_path = "", *conf_shell = "", *conf_home = "";
|
|
|
|
/* NB - this will leak memory like crazy if called often.... */
|
|
const char *
|
|
conf_path_file(const char *fn)
|
|
{
|
|
char *ret = malloc(strlen(conf_path)+strlen(fn)+20);
|
|
sprintf(ret, "%s/%s", conf_path, fn);
|
|
return ret;
|
|
}
|
|
|
|
/* XXX - do i need a function to generate host keys? DROPBEAR_DELAY_HOSTKEY */
|
|
/* XXX - a C-callable interface to get property strings from the java side (paths, etc) */
|
|
|
|
static JNIEnv *env;
|
|
static jclass cl_string;
|
|
static jclass cl_simplesshdservice;
|
|
static jfieldID fid_sss_sshd_pid;
|
|
|
|
extern int dropbear_main(int argc, char **argv);
|
|
|
|
static int
|
|
jni_init(JNIEnv *env_)
|
|
{
|
|
env = env_;
|
|
#define CLASS(var, id) \
|
|
cl_##var = (*env)->FindClass(env, id); \
|
|
if (!cl_##var) return 0;
|
|
#define METHOD(var, mycl, id, sig) \
|
|
mid_##var = (*env)->GetMethodID(env, cl_##mycl, id, sig); \
|
|
if (!mid_##var) return 0;
|
|
#define FIELD(var, mycl, id, sig) \
|
|
fid_##var = (*env)->GetFieldID(env, cl_##mycl, id, sig); \
|
|
if (!fid_##var) return 0;
|
|
#define STFIELD(var, mycl, id, sig) \
|
|
fid_##var = (*env)->GetStaticFieldID(env, cl_##mycl, id, sig); \
|
|
if (!fid_##var) return 0;
|
|
|
|
CLASS(string, "java/lang/String")
|
|
CLASS(simplesshdservice, "org/galexander/sshd/SimpleSSHDService")
|
|
|
|
STFIELD(sss_sshd_pid, simplesshdservice, "sshd_pid", "I")
|
|
|
|
return 1;
|
|
}
|
|
|
|
static const char *
|
|
from_java_string(jobject s)
|
|
{
|
|
const char *ret, *t;
|
|
t = (*env)->GetStringUTFChars(env, s, NULL);
|
|
if (!t) {
|
|
return "";
|
|
}
|
|
ret = strdup(t);
|
|
(*env)->ReleaseStringUTFChars(env, s, t);
|
|
return ret;
|
|
}
|
|
|
|
JNIEXPORT void JNICALL
|
|
Java_org_galexander_sshd_SimpleSSHDService_start_1sshd(JNIEnv *env_,
|
|
jobject this,
|
|
jint port, jobject jpath, jobject jshell, jobject jhome)
|
|
{
|
|
pid_t pid;
|
|
|
|
if (!jni_init(env_)) {
|
|
return;
|
|
}
|
|
conf_path = from_java_string(jpath);
|
|
conf_shell = from_java_string(jshell);
|
|
conf_home = from_java_string(jhome);
|
|
|
|
pid = fork();
|
|
if (pid == 0) {
|
|
char *argv[10] = { "sshd", NULL };
|
|
int argc = 1;
|
|
const char *logfn;
|
|
int logfd;
|
|
int retval;
|
|
|
|
logfn = conf_path_file("dropbear.err");
|
|
unlink(logfn);
|
|
logfd = open(logfn, O_CREAT|O_WRONLY, 0666);
|
|
if (logfd != -1) {
|
|
/* replace stderr, so the output is preserved... */
|
|
dup2(logfd, 2);
|
|
}
|
|
if (port) {
|
|
argv[argc++] = "-p";
|
|
argv[argc] = malloc(20);
|
|
sprintf(argv[argc], "%d", (int)port);
|
|
argc++;
|
|
}
|
|
fprintf(stderr, "starting dropbear\n");
|
|
retval = dropbear_main(1, argv);
|
|
fprintf(stderr, "dropbear finished (%d)\n", retval);
|
|
} else {
|
|
(*env)->SetStaticIntField(env, cl_simplesshdservice,
|
|
fid_sss_sshd_pid, pid);
|
|
}
|
|
}
|
|
|
|
JNIEXPORT void JNICALL
|
|
Java_org_galexander_sshd_SimpleSSHDService_stop_1sshd(JNIEnv *env_, jobject this)
|
|
{
|
|
pid_t pid;
|
|
if (!jni_init(env_)) {
|
|
return;
|
|
}
|
|
pid = (*env)->GetStaticIntField(env, cl_simplesshdservice, fid_sss_sshd_pid);
|
|
kill(pid, SIGKILL);
|
|
(*env)->SetStaticIntField(env, cl_simplesshdservice, fid_sss_sshd_pid, 0);
|
|
}
|
|
|
|
JNIEXPORT int JNICALL
|
|
Java_org_galexander_sshd_SimpleSSHDService_waitpid(JNIEnv *env_, jclass cl,
|
|
jint pid)
|
|
{
|
|
int status;
|
|
waitpid(pid, &status, 0);
|
|
if (WIFEXITED(status)) {
|
|
return WEXITSTATUS(status);
|
|
}
|
|
return 0;
|
|
}
|