400 lines
9.6 KiB
C
400 lines
9.6 KiB
C
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/*
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Copyright (c) 2010-2012 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License v1.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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http://www.eclipse.org/legal/epl-v10.html
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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#include <arpa/inet.h>
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <mosquitto_broker.h>
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#include <memory_mosq.h>
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#include <persist.h>
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static uint32_t db_version;
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static int _db_client_chunk_restore(struct mosquitto_db *db, FILE *db_fd)
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{
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uint16_t i16temp, slen, last_mid;
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char *client_id = NULL;
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int rc = 0;
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time_t disconnect_t;
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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slen = ntohs(i16temp);
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if(!slen){
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fprintf(stderr, "Error: Corrupt persistent database.");
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fclose(db_fd);
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return 1;
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}
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client_id = calloc(slen+1, sizeof(char));
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if(!client_id){
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fclose(db_fd);
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fprintf(stderr, "Error: Out of memory.");
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return 1;
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}
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read_e(db_fd, client_id, slen);
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printf("\tClient ID: %s\n", client_id);
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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last_mid = ntohs(i16temp);
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printf("\tLast MID: %d\n", last_mid);
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if(db_version == 2){
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disconnect_t = time(NULL);
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}else{
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read_e(db_fd, &disconnect_t, sizeof(time_t));
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printf("\tDisconnect time: %ld\n", disconnect_t);
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}
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free(client_id);
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return rc;
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error:
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fprintf(stderr, "Error: %s.", strerror(errno));
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if(db_fd >= 0) fclose(db_fd);
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if(client_id) free(client_id);
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return 1;
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}
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static int _db_client_msg_chunk_restore(struct mosquitto_db *db, FILE *db_fd)
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{
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dbid_t i64temp, store_id;
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uint16_t i16temp, slen, mid;
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uint8_t qos, retain, direction, state, dup;
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char *client_id = NULL;
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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slen = ntohs(i16temp);
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if(!slen){
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fprintf(stderr, "Error: Corrupt persistent database.");
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fclose(db_fd);
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return 1;
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}
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client_id = calloc(slen+1, sizeof(char));
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if(!client_id){
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fclose(db_fd);
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fprintf(stderr, "Error: Out of memory.");
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return 1;
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}
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read_e(db_fd, client_id, slen);
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printf("\tClient ID: %s\n", client_id);
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read_e(db_fd, &i64temp, sizeof(dbid_t));
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store_id = i64temp;
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printf("\tStore ID: %ld\n", (long )store_id);
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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mid = ntohs(i16temp);
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printf("\tMID: %d\n", mid);
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read_e(db_fd, &qos, sizeof(uint8_t));
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printf("\tQoS: %d\n", qos);
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read_e(db_fd, &retain, sizeof(uint8_t));
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printf("\tRetain: %d\n", retain);
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read_e(db_fd, &direction, sizeof(uint8_t));
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printf("\tDirection: %d\n", direction);
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read_e(db_fd, &state, sizeof(uint8_t));
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printf("\tState: %d\n", state);
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read_e(db_fd, &dup, sizeof(uint8_t));
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printf("\tDup: %d\n", dup);
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free(client_id);
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return 0;
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error:
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fprintf(stderr, "Error: %s.", strerror(errno));
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if(db_fd >= 0) fclose(db_fd);
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if(client_id) free(client_id);
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return 1;
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}
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static int _db_msg_store_chunk_restore(struct mosquitto_db *db, FILE *db_fd)
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{
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dbid_t i64temp, store_id;
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uint32_t i32temp, payloadlen;
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uint16_t i16temp, slen, source_mid, mid;
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uint8_t qos, retain, *payload = NULL;
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char *source_id = NULL;
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char *topic = NULL;
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int rc = 0;
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bool binary;
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int i;
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read_e(db_fd, &i64temp, sizeof(dbid_t));
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store_id = i64temp;
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printf("\tStore ID: %ld\n", (long)store_id);
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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slen = ntohs(i16temp);
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if(slen){
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source_id = calloc(slen+1, sizeof(char));
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if(!source_id){
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fclose(db_fd);
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fprintf(stderr, "Error: Out of memory.");
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return 1;
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}
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if(fread(source_id, 1, slen, db_fd) != slen){
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fprintf(stderr, "Error: %s.", strerror(errno));
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fclose(db_fd);
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free(source_id);
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return 1;
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}
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printf("\tSource ID: %s\n", source_id);
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free(source_id);
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}
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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source_mid = ntohs(i16temp);
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printf("\tSource MID: %d\n", source_mid);
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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mid = ntohs(i16temp);
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printf("\tMID: %d\n", mid);
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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slen = ntohs(i16temp);
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if(slen){
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topic = calloc(slen+1, sizeof(char));
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if(!topic){
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fclose(db_fd);
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free(source_id);
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fprintf(stderr, "Error: Out of memory.");
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return 1;
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}
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if(fread(topic, 1, slen, db_fd) != slen){
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fprintf(stderr, "Error: %s.", strerror(errno));
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fclose(db_fd);
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free(source_id);
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free(topic);
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return 1;
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}
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printf("\tTopic: %s\n", topic);
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free(topic);
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}else{
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fprintf(stderr, "Error: Invalid msg_store chunk when restoring persistent database.");
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fclose(db_fd);
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free(source_id);
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return 1;
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}
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read_e(db_fd, &qos, sizeof(uint8_t));
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printf("\tQoS: %d\n", qos);
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read_e(db_fd, &retain, sizeof(uint8_t));
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printf("\tRetain: %d\n", retain);
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read_e(db_fd, &i32temp, sizeof(uint32_t));
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payloadlen = ntohl(i32temp);
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printf("\tPayload Length: %d\n", payloadlen);
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if(payloadlen){
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payload = malloc(payloadlen+1);
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if(!payload){
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fclose(db_fd);
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free(source_id);
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free(topic);
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fprintf(stderr, "Error: Out of memory.");
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return 1;
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}
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memset(payload, 0, payloadlen+1);
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if(fread(payload, 1, payloadlen, db_fd) != payloadlen){
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fprintf(stderr, "Error: %s.", strerror(errno));
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fclose(db_fd);
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free(source_id);
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free(topic);
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free(payload);
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return 1;
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}
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binary = false;
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for(i=0; i<payloadlen; i++){
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if(payload[i] == 0) binary = true;
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}
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if(binary == false && payloadlen<256){
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printf("\tPayload: %s\n", payload);
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}
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free(payload);
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}
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return rc;
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error:
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fprintf(stderr, "Error: %s.", strerror(errno));
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if(db_fd >= 0) fclose(db_fd);
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if(source_id) free(source_id);
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if(topic) free(topic);
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return 1;
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}
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static int _db_retain_chunk_restore(struct mosquitto_db *db, FILE *db_fd)
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{
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dbid_t i64temp, store_id;
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if(fread(&i64temp, sizeof(dbid_t), 1, db_fd) != 1){
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fprintf(stderr, "Error: %s.", strerror(errno));
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fclose(db_fd);
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return 1;
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}
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store_id = i64temp;
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printf("\tStore ID: %ld\n", (long int)store_id);
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return 0;
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}
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static int _db_sub_chunk_restore(struct mosquitto_db *db, FILE *db_fd)
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{
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uint16_t i16temp, slen;
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uint8_t qos;
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char *client_id;
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char *topic;
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int rc = 0;
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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slen = ntohs(i16temp);
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client_id = calloc(slen+1, sizeof(char));
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if(!client_id){
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fclose(db_fd);
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fprintf(stderr, "Error: Out of memory.");
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return 1;
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}
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read_e(db_fd, client_id, slen);
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printf("\tClient ID: %s\n", client_id);
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read_e(db_fd, &i16temp, sizeof(uint16_t));
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slen = ntohs(i16temp);
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topic = calloc(slen+1, sizeof(char));
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if(!topic){
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fclose(db_fd);
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fprintf(stderr, "Error: Out of memory.");
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free(client_id);
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return 1;
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}
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read_e(db_fd, topic, slen);
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printf("\tTopic: %s\n", topic);
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read_e(db_fd, &qos, sizeof(uint8_t));
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printf("\tQoS: %d\n", qos);
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free(client_id);
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free(topic);
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return rc;
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error:
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fprintf(stderr, "Error: %s.", strerror(errno));
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if(db_fd >= 0) fclose(db_fd);
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return 1;
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}
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int main(int argc, char *argv[])
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{
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FILE *fd;
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char header[15];
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int rc = 0;
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uint32_t crc;
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dbid_t i64temp;
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uint32_t i32temp, length;
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uint16_t i16temp, chunk;
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uint8_t i8temp;
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ssize_t rlen;
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struct mosquitto_db db;
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if(argc != 2){
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fprintf(stderr, "Usage: db_dump <mosquitto db filename>\n");
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return 1;
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}
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memset(&db, 0, sizeof(struct mosquitto_db));
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fd = fopen(argv[1], "rb");
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if(!fd) return 0;
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read_e(fd, &header, 15);
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if(!memcmp(header, magic, 15)){
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printf("Mosquitto DB dump\n");
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// Restore DB as normal
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read_e(fd, &crc, sizeof(uint32_t));
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printf("CRC: %d\n", crc);
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read_e(fd, &i32temp, sizeof(uint32_t));
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db_version = ntohl(i32temp);
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printf("DB version: %d\n", db_version);
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while(rlen = fread(&i16temp, sizeof(uint16_t), 1, fd), rlen == 1){
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chunk = ntohs(i16temp);
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read_e(fd, &i32temp, sizeof(uint32_t));
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length = ntohl(i32temp);
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switch(chunk){
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case DB_CHUNK_CFG:
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printf("DB_CHUNK_CFG:\n");
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printf("\tLength: %d\n", length);
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read_e(fd, &i8temp, sizeof(uint8_t)); // shutdown
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printf("\tShutdown: %d\n", i8temp);
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read_e(fd, &i8temp, sizeof(uint8_t)); // sizeof(dbid_t)
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printf("\tDB ID size: %d\n", i8temp);
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if(i8temp != sizeof(dbid_t)){
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fprintf(stderr, "Error: Incompatible database configuration (dbid size is %d bytes, expected %ld)",
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i8temp, sizeof(dbid_t));
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fclose(fd);
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return 1;
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}
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read_e(fd, &i64temp, sizeof(dbid_t));
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printf("\tLast DB ID: %ld\n", (long)i64temp);
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break;
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case DB_CHUNK_MSG_STORE:
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printf("DB_CHUNK_MSG_STORE:\n");
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printf("\tLength: %d\n", length);
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if(_db_msg_store_chunk_restore(&db, fd)) return 1;
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break;
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case DB_CHUNK_CLIENT_MSG:
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printf("DB_CHUNK_CLIENT_MSG:\n");
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printf("\tLength: %d\n", length);
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if(_db_client_msg_chunk_restore(&db, fd)) return 1;
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break;
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case DB_CHUNK_RETAIN:
|
||
|
|
printf("DB_CHUNK_RETAIN:\n");
|
||
|
|
printf("\tLength: %d\n", length);
|
||
|
|
if(_db_retain_chunk_restore(&db, fd)) return 1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case DB_CHUNK_SUB:
|
||
|
|
printf("DB_CHUNK_SUB:\n");
|
||
|
|
printf("\tLength: %d\n", length);
|
||
|
|
if(_db_sub_chunk_restore(&db, fd)) return 1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case DB_CHUNK_CLIENT:
|
||
|
|
printf("DB_CHUNK_CLIENT:\n");
|
||
|
|
printf("\tLength: %d\n", length);
|
||
|
|
if(_db_client_chunk_restore(&db, fd)) return 1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
fprintf(stderr, "Warning: Unsupported chunk \"%d\" in persistent database file. Ignoring.", chunk);
|
||
|
|
fseek(fd, length, SEEK_CUR);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if(rlen < 0) goto error;
|
||
|
|
}else{
|
||
|
|
fprintf(stderr, "Error: Unrecognised file format.");
|
||
|
|
rc = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
fclose(fd);
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
error:
|
||
|
|
fprintf(stderr, "Error: %s.", strerror(errno));
|
||
|
|
if(fd >= 0) fclose(fd);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|