mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-19 05:07:56 +00:00
51ed6162dd
fdpoll will now run a callback when about to sleep / woke up. A new Java interface to indicate server started / sleeping / waking up. An android implementation may allow the CPU to sleep. If there's a java exception the server will try to shutdown. Calling servald stop is currently undefined.
567 lines
19 KiB
C
567 lines
19 KiB
C
/*
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Serval DNA command-line functions
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Copyright (C) 2010-2013 Serval Project Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "serval.h"
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#include "conf.h"
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#include "mdp_client.h"
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#include "cli.h"
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#include "keyring.h"
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#include "dataformats.h"
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#include "commandline.h"
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#include "server.h"
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DEFINE_CMD(commandline_usage,CLIFLAG_PERMISSIVE_CONFIG,
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"Display command usage.",
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"help|-h|--help","...");
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static int commandline_usage(const struct cli_parsed *parsed, struct cli_context *UNUSED(context))
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{
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printf("Serval DNA version %s\nUsage:\n", version_servald);
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return cli_usage_parsed(parsed, XPRINTF_STDIO(stdout));
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}
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DEFINE_CMD(version_message,CLIFLAG_PERMISSIVE_CONFIG,
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"Display copyright information.",
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"version|copyright");
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static int version_message(const struct cli_parsed *UNUSED(parsed), struct cli_context *UNUSED(context))
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{
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printf("Serval DNA version %s\n%s\n", version_servald, copyright_servald);
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printf("\
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License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.\n\
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This is free software: you are free to change and redistribute it.\n\
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There is NO WARRANTY, to the extent permitted by law.\n\
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");
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return 0;
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}
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/* Data structures for accumulating output of a single JNI call.
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*/
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#ifdef HAVE_JNI_H
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#define OUTV_BUFFER_ALLOCSIZE (8192)
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jclass IJniResults = NULL;
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jmethodID startResultSet, setColumnName, putString, putBlob, putLong, putDouble, totalRowCount;
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static int outv_growbuf(struct cli_context *context, size_t needed)
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{
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assert(context->outv_current <= context->outv_limit);
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size_t remaining = (size_t)(context->outv_limit - context->outv_current);
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if (remaining < needed) {
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size_t cursize = context->outv_current - context->outv_buffer;
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size_t newsize = cursize + needed;
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// Round up to nearest multiple of OUTV_BUFFER_ALLOCSIZE.
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newsize = newsize + OUTV_BUFFER_ALLOCSIZE - ((newsize - 1) % OUTV_BUFFER_ALLOCSIZE + 1);
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assert(newsize > cursize);
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assert((size_t)(newsize - cursize) >= needed);
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context->outv_buffer = realloc(context->outv_buffer, newsize);
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if (context->outv_buffer == NULL)
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return WHYF("Out of memory allocating %lu bytes", (unsigned long) newsize);
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context->outv_current = context->outv_buffer + cursize;
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context->outv_limit = context->outv_buffer + newsize;
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}
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return 0;
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}
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static int put_blob(struct cli_context *context, jbyte *value, jsize length){
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jbyteArray arr = NULL;
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if (context->jni_exception)
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return -1;
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arr = (*context->jni_env)->NewByteArray(context->jni_env, length);
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if (arr == NULL || (*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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return WHY("Exception thrown from NewByteArray()");
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}
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if (value && length>0){
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(*context->jni_env)->SetByteArrayRegion(context->jni_env, arr, 0, length, value);
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if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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return WHYF("Exception thrown from SetByteArrayRegion()");
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}
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}
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(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, putBlob, arr);
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if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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return WHY("Exception thrown from CallVoidMethod(putBlob)");
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}
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if (arr)
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(*context->jni_env)->DeleteLocalRef(context->jni_env, arr);
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return 0;
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}
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static int outv_end_field(struct cli_context *context)
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{
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jsize length = context->outv_current - context->outv_buffer;
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context->outv_current = context->outv_buffer;
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return put_blob(context, (jbyte *)context->outv_buffer, length);
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}
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int Throw(JNIEnv *env, const char *class, const char *msg)
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{
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jclass exceptionClass = NULL;
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if ((exceptionClass = (*env)->FindClass(env, class)) == NULL)
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return -1; // exception
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(*env)->ThrowNew(env, exceptionClass, msg);
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return -1;
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}
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int initJniTypes(JNIEnv *env)
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{
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if (IJniResults)
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return 0;
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IJniResults = (*env)->FindClass(env, "org/servalproject/servaldna/IJniResults");
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if (IJniResults==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate class org.servalproject.servaldna.IJniResults");
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// make sure the interface class cannot be garbage collected between invocations in the same process
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IJniResults = (jclass)(*env)->NewGlobalRef(env, IJniResults);
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if (IJniResults==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to create global ref to class org.servalproject.servaldna.IJniResults");
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startResultSet = (*env)->GetMethodID(env, IJniResults, "startResultSet", "(I)V");
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if (startResultSet==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method startResultSet");
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setColumnName = (*env)->GetMethodID(env, IJniResults, "setColumnName", "(ILjava/lang/String;)V");
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if (setColumnName==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method setColumnName");
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putString = (*env)->GetMethodID(env, IJniResults, "putString", "(Ljava/lang/String;)V");
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if (putString==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method putString");
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putBlob = (*env)->GetMethodID(env, IJniResults, "putBlob", "([B)V");
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if (putBlob==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method putBlob");
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putLong = (*env)->GetMethodID(env, IJniResults, "putLong", "(J)V");
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if (putLong==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method putLong");
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putDouble = (*env)->GetMethodID(env, IJniResults, "putDouble", "(D)V");
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if (putDouble==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method putDouble");
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totalRowCount = (*env)->GetMethodID(env, IJniResults, "totalRowCount", "(I)V");
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if (totalRowCount==NULL)
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return Throw(env, "java/lang/IllegalStateException", "Unable to locate method totalRowCount");
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return 0;
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}
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/* JNI entry point to command line. See org.servalproject.servald.ServalD class for the Java side.
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JNI method descriptor: "(Ljava/util/List;[Ljava/lang/String;)I"
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*/
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JNIEXPORT jint JNICALL Java_org_servalproject_servaldna_ServalDCommand_rawCommand(JNIEnv *env, jobject UNUSED(this), jobject outv, jobjectArray args)
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{
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struct cli_context context;
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bzero(&context, sizeof(context));
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int r;
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// find jni results methods
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if ((r=initJniTypes(env))!=0)
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return r;
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unsigned char status = 0; // to match what the shell gets: 0..255
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// Construct argv, argc from this method's arguments.
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jsize len = (*env)->GetArrayLength(env, args);
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const char **argv = alloca(sizeof(char*) * (len + 1));
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if (argv == NULL)
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return Throw(env, "java/lang/OutOfMemoryError", "alloca() returned NULL");
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bzero(argv, sizeof(char*) * (len + 1));
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jsize i;
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int argc = len;
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// From now on, in case of an exception we have to free some resources before
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// returning.
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static const char *EMPTY="";
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for (i = 0; !context.jni_exception && i < len; ++i) {
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const jstring arg = (jstring)(*env)->GetObjectArrayElement(env, args, i);
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if ((*env)->ExceptionCheck(env)){
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context.jni_exception = 1;
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}else if (arg == NULL) {
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argv[i] = EMPTY;
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} else {
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argv[i] = (*env)->GetStringUTFChars(env, arg, NULL);
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if (argv[i] == NULL)
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context.jni_exception = 1;
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}
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}
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if (!context.jni_exception) {
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// Set up the output buffer.
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context.jniResults = outv;
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context.outv_current = context.outv_buffer;
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// Execute the command.
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context.jni_env = env;
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status = parseCommandLine(&context, NULL, argc, argv);
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}
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// free any temporary output buffer
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if (context.outv_buffer)
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free(context.outv_buffer);
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// Release argv Java string buffers.
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for (i = 0; i < len; ++i) {
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if (argv[i] && argv[i]!=EMPTY) {
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const jstring arg = (jstring)(*env)->GetObjectArrayElement(env, args, i);
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if (arg)
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(*env)->ReleaseStringUTFChars(env, arg, argv[i]);
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}
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}
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// Deal with Java exceptions: NewStringUTF out of memory in outv_end_field().
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if (context.jni_exception || (context.outv_current != context.outv_buffer && outv_end_field(&context) == -1))
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return -1;
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return (jint) status;
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}
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#endif /* HAVE_JNI_H */
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/* The argc and argv arguments must be passed verbatim from main(argc, argv), so argv[0] is path to
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executable.
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*/
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int parseCommandLine(struct cli_context *context, const char *argv0, int argc, const char *const *args)
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{
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fd_clearstats();
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IN();
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struct cli_parsed parsed;
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int result = cli_parse(argc, args, __start_commands, __stop_commands, &parsed);
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switch (result) {
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case 0:
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// Do not run the command if the configuration does not load ok.
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if (((parsed.commands[parsed.cmdi].flags & CLIFLAG_PERMISSIVE_CONFIG) ? cf_reload_permissive() : cf_reload()) != -1)
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result = cli_invoke(&parsed, context);
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else {
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strbuf b = strbuf_alloca(160);
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strbuf_append_argv(b, argc, args);
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result = WHYF("configuration defective, not running command: %s", strbuf_str(b));
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}
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break;
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case 1:
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case 2:
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// Load configuration so that log messages can get out.
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cf_reload_permissive();
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NOWHENCE(HINTF("Run \"%s help\" for more information.", argv0 ? argv0 : "servald"));
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result =-1;
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break;
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default:
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// Load configuration so that log error messages can get out.
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cf_reload_permissive();
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break;
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}
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cli_cleanup();
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OUT();
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if (config.debug.timing)
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fd_showstats();
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return result;
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}
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/* Write a buffer of data to output. If in a JNI call, then this appends the data to the
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current output field, including any embedded nul characters. Returns a non-negative integer on
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success, EOF on error.
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*/
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int cli_write(struct cli_context *UNUSED(context), const unsigned char *buf, size_t len)
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{
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#ifdef HAVE_JNI_H
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if (context && context->jni_env) {
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size_t avail = context->outv_limit - context->outv_current;
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if (avail < len) {
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memcpy(context->outv_current, buf, avail);
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context->outv_current = context->outv_limit;
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if (outv_growbuf(context, len) == -1)
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return EOF;
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len -= avail;
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buf += avail;
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}
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memcpy(context->outv_current, buf, len);
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context->outv_current += len;
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return 0;
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}
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#endif
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return fwrite(buf, len, 1, stdout);
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}
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/* Write a null-terminated string to output. If in a JNI call, then this appends the string to the
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current output field. The terminating null is not included. Returns a non-negative integer on
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success, EOF on error.
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*/
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int cli_puts(struct cli_context *UNUSED(context), const char *str)
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{
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#ifdef HAVE_JNI_H
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if (context && context->jni_env)
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return cli_write(context, (const unsigned char *) str, strlen(str));
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else
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#endif
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return fputs(str, stdout);
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}
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/* Write a formatted string to output. If in a JNI call, then this appends the string to the
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current output field, excluding the terminating null.
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*/
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void cli_printf(struct cli_context *UNUSED(context), const char *fmt, ...)
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{
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va_list ap;
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#ifdef HAVE_JNI_H
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if (context && context->jni_env) {
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assert(context->outv_current <= context->outv_limit);
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size_t avail = context->outv_limit - context->outv_current;
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va_start(ap, fmt);
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int count = vsnprintf(context->outv_current, avail, fmt, ap);
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va_end(ap);
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if (count < 0) {
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WHYF("vsnprintf(%p,%zu,%s,...) failed", context->outv_current, avail, alloca_str_toprint(fmt));
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return;
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} else if ((size_t)count < avail) {
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context->outv_current += count;
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return;
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}
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if (outv_growbuf(context, count) == -1)
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return;
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avail = context->outv_limit - context->outv_current;
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va_start(ap, fmt);
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count = vsprintf(context->outv_current, fmt, ap);
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va_end(ap);
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if (count < 0) {
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WHYF("vsprintf(%p,%s,...) failed", context->outv_current, alloca_str_toprint(fmt));
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return;
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}
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assert((size_t)count < avail);
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context->outv_current += (size_t)count;
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} else
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#endif
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{
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va_start(ap, fmt);
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if (vfprintf(stdout, fmt, ap) < 0)
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WHYF("vfprintf(stdout,%s,...) failed", alloca_str_toprint(fmt));
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va_end(ap);
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}
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}
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void cli_columns(struct cli_context *context, int columns, const char *names[])
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{
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#ifdef HAVE_JNI_H
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if (context && context->jni_env) {
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if (context->jni_exception)
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return;
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(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, startResultSet, columns);
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if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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WHY("Exception thrown from CallVoidMethod(startResultSet)");
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return;
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}
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int i;
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for (i=0;i<columns;i++){
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jstring str = (jstring)(*context->jni_env)->NewStringUTF(context->jni_env, names[i]);
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if (str == NULL) {
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context->jni_exception = 1;
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WHY("Exception thrown from NewStringUTF()");
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return;
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}
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(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, setColumnName, i, str);
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(*context->jni_env)->DeleteLocalRef(context->jni_env, str);
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if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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WHY("Exception thrown from CallVoidMethod(setColumnName)");
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return;
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}
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}
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return;
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}
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#endif
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cli_printf(context, "%d", columns);
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cli_delim(context, "\n");
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int i;
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for (i=0;i<columns;i++){
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cli_puts(context, names[i]);
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if (i+1==columns)
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cli_delim(context, "\n");
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else
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cli_delim(context, ":");
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}
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}
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void cli_field_name(struct cli_context *context, const char *name, const char *delim)
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{
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#ifdef HAVE_JNI_H
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if (context && context->jni_env) {
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if (context->jni_exception)
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return;
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jstring str = (jstring)(*context->jni_env)->NewStringUTF(context->jni_env, name);
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if (str == NULL) {
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context->jni_exception = 1;
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WHY("Exception thrown from NewStringUTF()");
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return;
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}
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(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, setColumnName, -1, str);
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(*context->jni_env)->DeleteLocalRef(context->jni_env, str);
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if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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WHY("Exception thrown from CallVoidMethod(setColumnName)");
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return;
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}
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return;
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}
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#endif
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cli_puts(context, name);
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cli_delim(context, delim);
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}
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void cli_put_long(struct cli_context *context, int64_t value, const char *delim){
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#ifdef HAVE_JNI_H
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if (context && context->jni_env) {
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if (context->jni_exception)
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return;
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(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, putLong, value);
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if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
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context->jni_exception = 1;
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WHY("Exception thrown from CallVoidMethod(putLong)");
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}
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return;
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}
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#endif
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cli_printf(context, "%" PRId64, value);
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cli_delim(context, delim);
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}
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void cli_put_string(struct cli_context *context, const char *value, const char *delim){
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#ifdef HAVE_JNI_H
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if (context && context->jni_env) {
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if (context->jni_exception)
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return;
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jstring str = NULL;
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if (value){
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str = (jstring)(*context->jni_env)->NewStringUTF(context->jni_env, value);
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if (str == NULL) {
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|
context->jni_exception = 1;
|
|
WHY("Exception thrown from NewStringUTF()");
|
|
return;
|
|
}
|
|
}
|
|
(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, putString, str);
|
|
(*context->jni_env)->DeleteLocalRef(context->jni_env, str);
|
|
if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
|
|
context->jni_exception = 1;
|
|
WHY("Exception thrown from CallVoidMethod(putLong)");
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
if (value)
|
|
cli_puts(context, value);
|
|
cli_delim(context, delim);
|
|
}
|
|
|
|
void cli_put_hexvalue(struct cli_context *context, const unsigned char *value, int length, const char *delim){
|
|
#ifdef HAVE_JNI_H
|
|
if (context && context->jni_env) {
|
|
put_blob(context, (jbyte*)value, length);
|
|
return;
|
|
}
|
|
#endif
|
|
if (value)
|
|
cli_puts(context, alloca_tohex(value, length));
|
|
cli_delim(context, delim);
|
|
}
|
|
|
|
void cli_row_count(struct cli_context *UNUSED(context), int UNUSED(rows)){
|
|
#ifdef HAVE_JNI_H
|
|
if (context && context->jni_env) {
|
|
if (context->jni_exception)
|
|
return;
|
|
(*context->jni_env)->CallVoidMethod(context->jni_env, context->jniResults, totalRowCount, rows);
|
|
if ((*context->jni_env)->ExceptionCheck(context->jni_env)) {
|
|
context->jni_exception = 1;
|
|
WHY("Exception thrown from CallVoidMethod()");
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Delimit the current output field. This closes the current field, so that the next cli_ output
|
|
function will start appending to a new field. Returns 0 on success, -1 on error. If not in a
|
|
JNI call, then this simply writes a newline to standard output (or the value of the
|
|
SERVALD_OUTPUT_DELIMITER env var if set).
|
|
*/
|
|
int cli_delim(struct cli_context *UNUSED(context), const char *opt)
|
|
{
|
|
#ifdef HAVE_JNI_H
|
|
if (context && context->jni_env)
|
|
return outv_end_field(context);
|
|
#endif
|
|
const char *delim = getenv("SERVALD_OUTPUT_DELIMITER");
|
|
if (delim == NULL)
|
|
delim = opt ? opt : "\n";
|
|
fputs(delim, stdout);
|
|
return 0;
|
|
}
|
|
|
|
/* Flush the output fields if they are being written to standard output.
|
|
*/
|
|
void cli_flush(struct cli_context *UNUSED(context))
|
|
{
|
|
#ifdef HAVE_JNI_H
|
|
if (context && context->jni_env)
|
|
return;
|
|
#endif
|
|
fflush(stdout);
|
|
}
|
|
|
|
DEFINE_CMD(app_echo,CLIFLAG_PERMISSIVE_CONFIG,
|
|
"Output the supplied string.",
|
|
"echo","[-e]","[--]","...");
|
|
static int app_echo(const struct cli_parsed *parsed, struct cli_context *context)
|
|
{
|
|
if (config.debug.verbose)
|
|
DEBUG_cli_parsed(parsed);
|
|
int escapes = !cli_arg(parsed, "-e", NULL, NULL, NULL);
|
|
unsigned i;
|
|
for (i = parsed->varargi; i < parsed->argc; ++i) {
|
|
const char *arg = parsed->args[i];
|
|
if (config.debug.verbose)
|
|
DEBUGF("echo:argv[%d]=\"%s\"", i, arg);
|
|
if (escapes) {
|
|
unsigned char buf[strlen(arg)];
|
|
size_t len = strn_fromprint(buf, sizeof buf, arg, 0, '\0', NULL);
|
|
cli_write(context, buf, len);
|
|
} else
|
|
cli_puts(context, arg);
|
|
cli_delim(context, NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_CMD(app_log,CLIFLAG_PERMISSIVE_CONFIG,
|
|
"Log the supplied message at given level.",
|
|
"log","error|warn|hint|info|debug","<message>");
|
|
static int app_log(const struct cli_parsed *parsed, struct cli_context *UNUSED(context))
|
|
{
|
|
if (config.debug.verbose)
|
|
DEBUG_cli_parsed(parsed);
|
|
assert(parsed->argc == 3);
|
|
const char *lvl = parsed->args[1];
|
|
const char *msg = parsed->args[2];
|
|
int level = string_to_log_level(lvl);
|
|
if (level == LOG_LEVEL_INVALID)
|
|
return WHYF("invalid log level: %s", lvl);
|
|
logMessage(level, __NOWHERE__, "%s", msg);
|
|
return 0;
|
|
}
|
|
|