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/* Author: pavel.odintsov@gmail.com */
/* License: GPLv2 */
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# include <stdio.h>
# include <stdlib.h>
# include <errno.h>
# include <string.h>
# include <unistd.h>
# include <signal.h>
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# include <time.h>
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# include <math.h>
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# include <sys/socket.h>
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# include <sys/resource.h>
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# include <sys/stat.h>
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# include <arpa/inet.h>
# include <netinet/ip.h>
# include <netinet/tcp.h>
# include <netinet/udp.h>
# include <netinet/ip_icmp.h>
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# include <netinet/if_ether.h>
# include <netinet/in.h>
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# include <netdb.h>
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# include "libpatricia/patricia.h"
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# include "fastnetmon_types.h"
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// Plugins
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# include "sflow_plugin/sflow_collector.h"
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# include "netflow_plugin/netflow_collector.h"
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# include "pcap_plugin/pcap_collector.h"
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# include "netmap_plugin/netmap_collector.h"
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// Our structires
// #include "fast_priority_queue.h"
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# ifdef PF_RING
# include "pfring_plugin/pfring_collector.h"
# endif
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// Yes, maybe it's not an good idea but with this we can guarantee working code in example plugin
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# include "example_plugin/example_collector.h"
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# include <algorithm>
# include <iostream>
# include <map>
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# include <fstream>
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# include <vector>
# include <utility>
# include <sstream>
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# include <boost/thread.hpp>
# include <boost/thread/mutex.hpp>
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# include <boost/regex.hpp>
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// log4cpp logging facility
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# include "log4cpp/Category.hh"
# include "log4cpp/Appender.hh"
# include "log4cpp/FileAppender.hh"
# include "log4cpp/OstreamAppender.hh"
# include "log4cpp/Layout.hh"
# include "log4cpp/BasicLayout.hh"
# include "log4cpp/PatternLayout.hh"
# include "log4cpp/Priority.hh"
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// Boost libs
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# include <boost/algorithm/string.hpp>
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# ifdef GEOIP
# include "GeoIP.h"
# endif
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# ifdef REDIS
# include <hiredis/hiredis.h>
# endif
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std : : string global_config_path = " /etc/fastnetmon.conf " ;
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boost : : regex regular_expression_cidr_pattern ( " ^ \\ d+ \\ . \\ d+ \\ . \\ d+ \\ . \\ d+ \\ / \\ d+$ " ) ;
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time_t last_call_of_traffic_recalculation ;
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// Variable with all data from main screen
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std : : string screen_data_stats = " " ;
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// Global map with parsed config file
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std : : map < std : : string , std : : string > configuration_map ;
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/* Configuration block, we must move it to configuration file */
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# ifdef REDIS
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unsigned int redis_port = 6379 ;
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std : : string redis_host = " 127.0.0.1 " ;
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// because it's additional and very specific feature we should disable it by default
bool redis_enabled = false ;
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# endif
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bool enable_ban_for_pps = false ;
bool enable_ban_for_bandwidth = false ;
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bool enable_ban_for_flows_per_second = false ;
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bool enable_conection_tracking = true ;
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bool enable_data_collection_from_mirror = true ;
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bool enable_netmap_collection = false ;
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bool enable_sflow_collection = false ;
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bool enable_netflow_collection = false ;
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bool enable_pcap_collection = false ;
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// Time consumed by reaclculation for all IPs
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struct timeval speed_calculation_time ;
// Time consumed by drawing stats for all IPs
struct timeval drawing_thread_execution_time ;
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// Total number of hosts in our networks
// We need this as global variable because it's very important value for configuring data structures
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unsigned int total_number_of_hosts_in_our_networks = 0 ;
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# ifdef GEOIP
GeoIP * geo_ip = NULL ;
# endif
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patricia_tree_t * lookup_tree , * whitelist_tree ;
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bool DEBUG = 0 ;
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// flag about dumping all packets to log
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bool DEBUG_DUMP_ALL_PACKETS = false ;
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// Period for update screen for console version of tool
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unsigned int check_period = 3 ;
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// Standard ban time in seconds for all attacks but you can tune this value
int standard_ban_time = 1800 ;
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// We calc average pps/bps for this time
double average_calculation_amount = 15 ;
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// Show average or absolute value of speed
bool print_average_traffic_counts = true ;
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// Key used for sorting clients in output. Allowed sort params: packets/bytes
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std : : string sort_parameter = " packets " ;
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// Path to notify script
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std : : string notify_script_path = " /usr/local/bin/notify_about_attack.sh " ;
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// Number of lines in programm output
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unsigned int max_ips_in_list = 7 ;
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// We must ban IP if it exceeed this limit in PPS
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unsigned int ban_threshold_pps = 20000 ;
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// We must ban IP of it exceed this limit for number of flows in any direction
unsigned int ban_threshold_flows = 3500 ;
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// We must ban client if it exceed 1GBps
unsigned int ban_threshold_mbps = 1000 ;
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// Number of lines for sending ben attack details to email
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unsigned int ban_details_records_count = 500 ;
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// log file
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log4cpp : : Category & logger = log4cpp : : Category : : getRoot ( ) ;
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std : : string log_file_path = " /var/log/fastnetmon.log " ;
std : : string attack_details_folder = " /var/log/fastnetmon_attacks " ;
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/* Configuration block ends */
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/* Our data structs */
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// Enum with availible sort by field
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enum sort_type { PACKETS , BYTES , FLOWS } ;
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enum direction {
INCOMING = 0 ,
OUTGOING ,
INTERNAL ,
OTHER
} ;
typedef struct {
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uint64_t bytes ;
uint64_t packets ;
uint64_t flows ;
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} total_counter_element ;
// We count total number of incoming/outgoing/internal and other traffic type packets/bytes
// And initilize by 0 all fields
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total_counter_element total_counters [ 4 ] ;
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total_counter_element total_speed_counters [ 4 ] ;
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// Total amount of non parsed packets
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uint64_t total_unparsed_packets = 0 ;
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uint64_t incoming_total_flows_speed = 0 ;
uint64_t outgoing_total_flows_speed = 0 ;
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typedef std : : pair < uint32_t , uint32_t > subnet ;
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// main data structure for storing traffic and speed data for all our IPs
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class map_element {
public :
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map_element ( ) : in_bytes ( 0 ) , out_bytes ( 0 ) , in_packets ( 0 ) , out_packets ( 0 ) , tcp_in_packets ( 0 ) , tcp_out_packets ( 0 ) , tcp_in_bytes ( 0 ) , tcp_out_bytes ( 0 ) ,
udp_in_packets ( 0 ) , udp_out_packets ( 0 ) , udp_in_bytes ( 0 ) , udp_out_bytes ( 0 ) , in_flows ( 0 ) , out_flows ( 0 ) ,
icmp_in_packets ( 0 ) , icmp_out_packets ( 0 ) , icmp_in_bytes ( 0 ) , icmp_out_bytes ( 0 )
{ }
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uint64_t in_bytes ;
uint64_t out_bytes ;
uint64_t in_packets ;
uint64_t out_packets ;
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// Additional data for correct attack protocol detection
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uint64_t tcp_in_packets ;
uint64_t tcp_out_packets ;
uint64_t tcp_in_bytes ;
uint64_t tcp_out_bytes ;
uint64_t udp_in_packets ;
uint64_t udp_out_packets ;
uint64_t udp_in_bytes ;
uint64_t udp_out_bytes ;
uint64_t icmp_in_packets ;
uint64_t icmp_out_packets ;
uint64_t icmp_in_bytes ;
uint64_t icmp_out_bytes ;
uint64_t in_flows ;
uint64_t out_flows ;
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} ;
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// structure with attack details
class attack_details : public map_element {
public :
attack_details ( ) :
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attack_protocol ( 0 ) , attack_power ( 0 ) , max_attack_power ( 0 ) , average_in_bytes ( 0 ) , average_out_bytes ( 0 ) , average_in_packets ( 0 ) , average_out_packets ( 0 ) , average_in_flows ( 0 ) , average_out_flows ( 0 ) , ban_time ( standard_ban_time ) , attack_direction ( OTHER ) {
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}
direction attack_direction ;
// first attackpower detected
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uint64_t attack_power ;
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// max attack power
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uint64_t max_attack_power ;
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unsigned int attack_protocol ;
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// Average counters
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uint64_t average_in_bytes ;
uint64_t average_out_bytes ;
uint64_t average_in_packets ;
uint64_t average_out_packets ;
uint64_t average_in_flows ;
uint64_t average_out_flows ;
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// time when we but this user
time_t ban_timestamp ;
int ban_time ; // seconds of the ban
} ;
typedef attack_details banlist_item ;
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// struct for save per direction and per protocol details for flow
typedef struct {
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uint64_t bytes ;
uint64_t packets ;
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// will be used for Garbage Collection
time_t last_update_time ;
} conntrack_key_struct ;
typedef uint64_t packed_session ;
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// Main mega structure for storing conntracks
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// We should use class instead struct for correct std::map allocation
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typedef std : : map < packed_session , conntrack_key_struct > contrack_map_type ;
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class conntrack_main_struct {
public :
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contrack_map_type in_tcp ;
contrack_map_type in_udp ;
contrack_map_type in_icmp ;
contrack_map_type in_other ;
contrack_map_type out_tcp ;
contrack_map_type out_udp ;
contrack_map_type out_icmp ;
contrack_map_type out_other ;
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} ;
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typedef std : : map < uint32_t , map_element > map_for_counters ;
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typedef std : : vector < map_element > vector_of_counters ;
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typedef std : : map < unsigned long int , vector_of_counters > map_of_vector_counters ;
map_of_vector_counters SubnetVectorMap ;
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// Flow tracking structures
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typedef std : : vector < conntrack_main_struct > vector_of_flow_counters ;
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typedef std : : map < unsigned long int , vector_of_flow_counters > map_of_vector_counters_for_flow ;
map_of_vector_counters_for_flow SubnetVectorMapFlow ;
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class packed_conntrack_hash {
public :
packed_conntrack_hash ( ) : opposite_ip ( 0 ) , src_port ( 0 ) , dst_port ( 0 ) { }
// src or dst IP
uint32_t opposite_ip ;
uint16_t src_port ;
uint16_t dst_port ;
} ;
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// data structure for storing data in Vector
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typedef std : : pair < uint32_t , map_element > pair_of_map_elements ;
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/* End of our data structs */
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boost : : mutex data_counters_mutex ;
boost : : mutex speed_counters_mutex ;
boost : : mutex total_counters_mutex ;
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boost : : mutex ban_list_details_mutex ;
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boost : : mutex ban_list_mutex ;
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boost : : mutex flow_counter ;
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# ifdef REDIS
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redisContext * redis_context = NULL ;
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# endif
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// map for flows
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std : : map < uint64_t , int > FlowCounter ;
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// Struct for string speed per IP
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map_for_counters SpeedCounter ;
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// Struct for storing average speed per IP for specified interval
map_for_counters SpeedCounterAverage ;
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# ifdef GEOIP
map_for_counters GeoIpCounter ;
# endif
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// In ddos info we store attack power and direction
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std : : map < uint32_t , banlist_item > ban_list ;
std : : map < uint32_t , std : : vector < simple_packet > > ban_list_details ;
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std : : vector < subnet > our_networks ;
std : : vector < subnet > whitelist_networks ;
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// Ban enable/disable flag
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bool we_do_real_ban = true ;
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bool process_incoming_traffic = true ;
bool process_outgoing_traffic = true ;
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// Prototypes
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# ifdef HWFILTER_LOCKING
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void block_all_traffic_with_82599_hardware_filtering ( std : : string client_ip_as_string ) ;
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# endif
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bool we_should_ban_this_ip ( map_element * current_average_speed_element ) ;
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std : : string get_net_address_from_network_as_string ( std : : string network_cidr_format ) ;
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unsigned int get_max_used_protocol ( uint64_t tcp , uint64_t udp , uint64_t icmp ) ;
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std : : string get_printable_protocol_name ( unsigned int protocol ) ;
void print_attack_details_to_file ( std : : string details , std : : string client_ip_as_string , attack_details current_attack ) ;
bool folder_exists ( std : : string path ) ;
std : : string print_time_t_in_fastnetmon_format ( time_t current_time ) ;
std : : string print_ban_thresholds ( ) ;
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bool load_configuration_file ( ) ;
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std : : string print_flow_tracking_for_ip ( conntrack_main_struct & conntrack_element , std : : string client_ip ) ;
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void convert_integer_to_conntrack_hash_struct ( packed_session * packed_connection_data , packed_conntrack_hash * unpacked_data ) ;
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uint64_t convert_conntrack_hash_struct_to_integer ( packed_conntrack_hash * struct_value ) ;
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int timeval_subtract ( struct timeval * result , struct timeval * x , struct timeval * y ) ;
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bool is_cidr_subnet ( const char * subnet ) ;
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uint64_t MurmurHash64A ( const void * key , int len , uint64_t seed ) ;
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void cleanup_ban_list ( ) ;
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std : : string print_tcp_flags ( uint8_t flag_value ) ;
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int extract_bit_value ( uint8_t num , int bit ) ;
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std : : string get_attack_description ( uint32_t client_ip , attack_details & current_attack ) ;
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uint64_t convert_speed_to_mbps ( uint64_t speed_in_bps ) ;
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void send_attack_details ( uint32_t client_ip , attack_details current_attack_details ) ;
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std : : string convert_timeval_to_date ( struct timeval tv ) ;
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void free_up_all_resources ( ) ;
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unsigned int get_cidr_mask_from_network_as_string ( std : : string network_cidr_format ) ;
std : : string print_ddos_attack_details ( ) ;
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void execute_ip_ban ( uint32_t client_ip , map_element new_speed_element , map_element current_speed_element , std : : string flow_attack_details ) ;
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direction get_packet_direction ( uint32_t src_ip , uint32_t dst_ip , unsigned long & subnet ) ;
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void recalculate_speed ( ) ;
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std : : string print_channel_speed ( std : : string traffic_type , direction packet_direction ) ;
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void process_packet ( simple_packet & current_packet ) ;
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void copy_networks_from_string_form_to_binary ( std : : vector < std : : string > networks_list_as_string , std : : vector < subnet > & our_networks ) ;
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bool file_exists ( std : : string path ) ;
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void traffic_draw_programm ( ) ;
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void ulog_main_loop ( ) ;
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void signal_handler ( int signal_number ) ;
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uint32_t convert_cidr_to_binary_netmask ( unsigned int cidr ) ;
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/* Class for custom comparison fields by different fields */
class TrafficComparatorClass {
private :
sort_type sort_field ;
direction sort_direction ;
public :
TrafficComparatorClass ( direction sort_direction , sort_type sort_field ) {
this - > sort_field = sort_field ;
this - > sort_direction = sort_direction ;
}
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bool operator ( ) ( pair_of_map_elements a , pair_of_map_elements b ) {
if ( sort_field = = FLOWS ) {
if ( sort_direction = = INCOMING ) {
return a . second . in_flows > b . second . in_flows ;
} else if ( sort_direction = = OUTGOING ) {
return a . second . out_flows > b . second . out_flows ;
} else {
return false ;
}
} else if ( sort_field = = PACKETS ) {
if ( sort_direction = = INCOMING ) {
return a . second . in_packets > b . second . in_packets ;
} else if ( sort_direction = = OUTGOING ) {
return a . second . out_packets > b . second . out_packets ;
} else {
return false ;
}
} else if ( sort_field = = BYTES ) {
if ( sort_direction = = INCOMING ) {
return a . second . in_bytes > b . second . in_bytes ;
} else if ( sort_direction = = OUTGOING ) {
return a . second . out_bytes > b . second . out_bytes ;
} else {
return false ;
}
} else {
return false ;
}
}
} ;
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std : : string get_direction_name ( direction direction_value ) {
std : : string direction_name ;
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switch ( direction_value ) {
case INCOMING : direction_name = " incoming " ; break ;
case OUTGOING : direction_name = " outgoing " ; break ;
case INTERNAL : direction_name = " internal " ; break ;
case OTHER : direction_name = " other " ; break ;
default : direction_name = " unknown " ; break ;
}
return direction_name ;
}
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uint32_t convert_ip_as_string_to_uint ( std : : string ip ) {
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struct in_addr ip_addr ;
inet_aton ( ip . c_str ( ) , & ip_addr ) ;
// in network byte order
return ip_addr . s_addr ;
}
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std : : string convert_ip_as_uint_to_string ( uint32_t ip_as_integer ) {
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struct in_addr ip_addr ;
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ip_addr . s_addr = ip_as_integer ;
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return ( std : : string ) inet_ntoa ( ip_addr ) ;
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}
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// convert integer to string
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std : : string convert_int_to_string ( int value ) {
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std : : stringstream out ;
out < < value ;
return out . str ( ) ;
}
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// exec command in shell
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std : : vector < std : : string > exec ( std : : string cmd ) {
std : : vector < std : : string > output_list ;
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FILE * pipe = popen ( cmd . c_str ( ) , " r " ) ;
if ( ! pipe ) return output_list ;
char buffer [ 256 ] ;
while ( ! feof ( pipe ) ) {
if ( fgets ( buffer , 256 , pipe ) ! = NULL ) {
size_t newbuflen = strlen ( buffer ) ;
// remove newline at the end
if ( buffer [ newbuflen - 1 ] = = ' \n ' ) {
buffer [ newbuflen - 1 ] = ' \0 ' ;
}
output_list . push_back ( buffer ) ;
}
}
pclose ( pipe ) ;
return output_list ;
}
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// exec command and pass data to it stdin
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bool exec_with_stdin_params ( std : : string cmd , std : : string params ) {
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FILE * pipe = popen ( cmd . c_str ( ) , " w " ) ;
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if ( ! pipe ) {
logger < < log4cpp : : Priority : : ERROR < < " Can't execute programm " < < cmd < < " error code: " < < errno < < " error text: " < < strerror ( errno ) ;
return false ;
}
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if ( fputs ( params . c_str ( ) , pipe ) ) {
fclose ( pipe ) ;
return true ;
} else {
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logger < < log4cpp : : Priority : : ERROR < < " Can't pass data to stdin of programm " < < cmd ;
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fclose ( pipe ) ;
return false ;
}
}
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# ifdef GEOIP
bool geoip_init ( ) {
// load GeoIP ASN database to memory
geo_ip = GeoIP_open ( " /root/fastnetmon/GeoIPASNum.dat " , GEOIP_MEMORY_CACHE ) ;
if ( geo_ip = = NULL ) {
return false ;
} else {
return true ;
}
}
# endif
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# ifdef REDIS
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bool redis_init_connection ( ) {
struct timeval timeout = { 1 , 500000 } ; // 1.5 seconds
redis_context = redisConnectWithTimeout ( redis_host . c_str ( ) , redis_port , timeout ) ;
if ( redis_context - > err ) {
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logger < < log4cpp : : Priority : : INFO < < " Connection error: " < < redis_context - > errstr ;
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return false ;
}
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// We should check connection with ping because redis do not check connection
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redisReply * reply = ( redisReply * ) redisCommand ( redis_context , " PING " ) ;
if ( reply ) {
freeReplyObject ( reply ) ;
} else {
return false ;
}
return true ;
}
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void update_traffic_in_redis ( uint32_t ip , unsigned int traffic_bytes , direction my_direction ) {
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std : : string ip_as_string = convert_ip_as_uint_to_string ( ip ) ;
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redisReply * reply ;
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if ( ! redis_context ) {
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logger < < log4cpp : : Priority : : INFO < < " Please initialize Redis handle " ;
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return ;
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}
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std : : string key_name = ip_as_string + " _ " + get_direction_name ( my_direction ) ;
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reply = ( redisReply * ) redisCommand ( redis_context , " INCRBY %s %s " , key_name . c_str ( ) , convert_int_to_string ( traffic_bytes ) . c_str ( ) ) ;
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// If we store data correctly ...
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if ( ! reply ) {
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logger . error ( " Can't increment traffic in redis error_code: %d error_string: %s " , redis_context - > err , redis_context - > errstr ) ;
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// Handle redis server restart corectly
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if ( redis_context - > err = = 1 or redis_context - > err = = 3 ) {
// Connection refused
redis_init_connection ( ) ;
}
} else {
freeReplyObject ( reply ) ;
}
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}
# endif
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std : : string draw_table ( map_for_counters & my_map_packets , direction data_direction , bool do_redis_update , sort_type sort_item ) {
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std : : vector < pair_of_map_elements > vector_for_sort ;
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std : : stringstream output_buffer ;
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// Preallocate memory for sort vector
vector_for_sort . reserve ( my_map_packets . size ( ) ) ;
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for ( map_for_counters : : iterator ii = my_map_packets . begin ( ) ; ii ! = my_map_packets . end ( ) ; + + ii ) {
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// store all elements into vector for sorting
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vector_for_sort . push_back ( std : : make_pair ( ( * ii ) . first , ( * ii ) . second ) ) ;
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}
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if ( data_direction = = INCOMING or data_direction = = OUTGOING ) {
std : : sort ( vector_for_sort . begin ( ) , vector_for_sort . end ( ) , TrafficComparatorClass ( data_direction , sort_item ) ) ;
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} else {
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logger < < log4cpp : : Priority : : ERROR < < " Unexpected bahaviour on sort function " ;
return " Internal error " ;
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}
unsigned int element_number = 0 ;
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// TODO: fix this code because iteraton over over millions of IPs is very CPU intensive
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for ( std : : vector < pair_of_map_elements > : : iterator ii = vector_for_sort . begin ( ) ; ii ! = vector_for_sort . end ( ) ; + + ii ) {
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uint32_t client_ip = ( * ii ) . first ;
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std : : string client_ip_as_string = convert_ip_as_uint_to_string ( ( * ii ) . first ) ;
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uint64_t pps = 0 ;
uint64_t bps = 0 ;
uint64_t flows = 0 ;
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uint64_t pps_average = 0 ;
uint64_t bps_average = 0 ;
uint64_t flows_average = 0 ;
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// TODO: replace map by vector iteration
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map_element * current_average_speed_element = & SpeedCounterAverage [ client_ip ] ;
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map_element * current_speed_element = & SpeedCounter [ client_ip ] ;
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// Create polymorphic pps, byte and flow counters
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if ( data_direction = = INCOMING ) {
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pps = current_speed_element - > in_packets ;
bps = current_speed_element - > in_bytes ;
flows = current_speed_element - > in_flows ;
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pps_average = current_average_speed_element - > in_packets ;
bps_average = current_average_speed_element - > in_bytes ;
flows_average = current_average_speed_element - > in_flows ;
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} else if ( data_direction = = OUTGOING ) {
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pps = current_speed_element - > out_packets ;
bps = current_speed_element - > out_bytes ;
flows = current_speed_element - > out_flows ;
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pps_average = current_average_speed_element - > out_packets ;
bps_average = current_average_speed_element - > out_bytes ;
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flows_average = current_average_speed_element - > out_flows ;
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}
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uint64_t mbps = convert_speed_to_mbps ( bps ) ;
uint64_t mbps_average = convert_speed_to_mbps ( bps_average ) ;
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// Print first max_ips_in_list elements in list, we will show top 20 "huge" channel loaders
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if ( element_number < max_ips_in_list ) {
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std : : string is_banned = ban_list . count ( client_ip ) > 0 ? " *banned* " : " " ;
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// We use setw for alignment
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output_buffer < < client_ip_as_string < < " \t \t " ;
if ( print_average_traffic_counts ) {
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output_buffer < < std : : setw ( 6 ) < < pps_average < < " pps " ;
output_buffer < < std : : setw ( 6 ) < < mbps_average < < " mbps " ;
output_buffer < < std : : setw ( 6 ) < < flows_average < < " flows " ;
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} else {
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output_buffer < < std : : setw ( 6 ) < < pps < < " pps " ;
output_buffer < < std : : setw ( 6 ) < < mbps < < " mbps " ;
output_buffer < < std : : setw ( 6 ) < < flows < < " flows " ;
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}
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output_buffer < < is_banned < < std : : endl ;
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}
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# ifdef REDIS
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if ( redis_enabled & & do_redis_update ) {
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update_traffic_in_redis ( ( * ii ) . first , ( * ii ) . second . in_packets , INCOMING ) ;
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update_traffic_in_redis ( ( * ii ) . first , ( * ii ) . second . out_packets , OUTGOING ) ;
}
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# endif
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element_number + + ;
}
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return output_buffer . str ( ) ;
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}
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// check file existence
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bool file_exists ( std : : string path ) {
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FILE * check_file = fopen ( path . c_str ( ) , " r " ) ;
if ( check_file ) {
fclose ( check_file ) ;
return true ;
} else {
return false ;
}
}
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// read whole file to vector
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std : : vector < std : : string > read_file_to_vector ( std : : string file_name ) {
std : : vector < std : : string > data ;
std : : string line ;
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std : : ifstream reading_file ;
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reading_file . open ( file_name . c_str ( ) , std : : ifstream : : in ) ;
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if ( reading_file . is_open ( ) ) {
while ( getline ( reading_file , line ) ) {
data . push_back ( line ) ;
}
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} else {
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logger < < log4cpp : : Priority : : ERROR < < " Can't open file: " < < file_name ;
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}
return data ;
}
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// Load configuration
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bool load_configuration_file ( ) {
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std : : ifstream config_file ( global_config_path . c_str ( ) ) ;
std : : string line ;
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if ( ! config_file . is_open ( ) ) {
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logger < < log4cpp : : Priority : : ERROR < < " Can't open config file " ;
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return false ;
}
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while ( getline ( config_file , line ) ) {
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std : : vector < std : : string > parsed_config ;
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boost : : split ( parsed_config , line , boost : : is_any_of ( " = " ) , boost : : token_compress_on ) ;
if ( parsed_config . size ( ) = = 2 ) {
configuration_map [ parsed_config [ 0 ] ] = parsed_config [ 1 ] ;
} else {
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logger < < log4cpp : : Priority : : ERROR < < " Can't parse config line: ' " < < line < < " ' " ;
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}
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}
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if ( configuration_map . count ( " enable_connection_tracking " ) ) {
if ( configuration_map [ " enable_connection_tracking " ] = = " on " ) {
enable_conection_tracking = true ;
} else {
enable_conection_tracking = false ;
}
}
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if ( configuration_map . count ( " ban_time " ) ! = 0 ) {
standard_ban_time = convert_string_to_integer ( configuration_map [ " ban_time " ] ) ;
}
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if ( configuration_map . count ( " average_calculation_time " ) ! = 0 ) {
average_calculation_amount = convert_string_to_integer ( configuration_map [ " average_calculation_time " ] ) ;
}
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if ( configuration_map . count ( " threshold_pps " ) ! = 0 ) {
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ban_threshold_pps = convert_string_to_integer ( configuration_map [ " threshold_pps " ] ) ;
}
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if ( configuration_map . count ( " threshold_mbps " ) ! = 0 ) {
ban_threshold_mbps = convert_string_to_integer ( configuration_map [ " threshold_mbps " ] ) ;
}
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if ( configuration_map . count ( " threshold_flows " ) ! = 0 ) {
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ban_threshold_flows = convert_string_to_integer ( configuration_map [ " threshold_flows " ] ) ;
}
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if ( configuration_map . count ( " enable_ban " ) ! = 0 ) {
if ( configuration_map [ " enable_ban " ] = = " on " ) {
we_do_real_ban = true ;
} else {
we_do_real_ban = false ;
}
}
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if ( configuration_map . count ( " sflow " ) ! = 0 ) {
if ( configuration_map [ " sflow " ] = = " on " ) {
enable_sflow_collection = true ;
} else {
enable_sflow_collection = false ;
}
}
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if ( configuration_map . count ( " netflow " ) ! = 0 ) {
if ( configuration_map [ " netflow " ] = = " on " ) {
enable_netflow_collection = true ;
} else {
enable_netflow_collection = false ;
}
}
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if ( configuration_map . count ( " process_incoming_traffic " ) ! = 0 ) {
process_incoming_traffic = configuration_map [ " process_incoming_traffic " ] = = " on " ? true : false ;
}
if ( configuration_map . count ( " process_outgoing_traffic " ) ! = 0 ) {
process_outgoing_traffic = configuration_map [ " process_outgoing_traffic " ] = = " on " ? true : false ;
}
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if ( configuration_map . count ( " mirror " ) ! = 0 ) {
if ( configuration_map [ " mirror " ] = = " on " ) {
enable_data_collection_from_mirror = true ;
} else {
enable_data_collection_from_mirror = false ;
}
}
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if ( configuration_map . count ( " mirror_netmap " ) ! = 0 ) {
if ( configuration_map [ " mirror_netmap " ] = = " on " ) {
enable_netmap_collection = true ;
} else {
enable_netmap_collection = false ;
}
}
if ( enable_netmap_collection & & enable_data_collection_from_mirror ) {
logger < < log4cpp : : Priority : : ERROR < < " You have enabled pfring and netmap data collection from mirror which strictly prohibited, please select one " ;
exit ( 1 ) ;
}
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if ( configuration_map . count ( " pcap " ) ! = 0 ) {
if ( configuration_map [ " pcap " ] = = " on " ) {
enable_pcap_collection = true ;
} else {
enable_pcap_collection = false ;
}
}
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if ( configuration_map . count ( " ban_for_pps " ) ! = 0 ) {
if ( configuration_map [ " ban_for_pps " ] = = " on " ) {
enable_ban_for_pps = true ;
} else {
enable_ban_for_pps = false ;
}
}
if ( configuration_map . count ( " ban_for_bandwidth " ) ! = 0 ) {
if ( configuration_map [ " ban_for_bandwidth " ] = = " on " ) {
enable_ban_for_bandwidth = true ;
} else {
enable_ban_for_bandwidth = false ;
}
}
if ( configuration_map . count ( " ban_for_flows " ) ! = 0 ) {
if ( configuration_map [ " ban_for_flows " ] = = " on " ) {
enable_ban_for_flows_per_second = true ;
} else {
enable_ban_for_flows_per_second = false ;
}
}
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# ifdef REDIS
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if ( configuration_map . count ( " redis_port " ) ! = 0 ) {
redis_port = convert_string_to_integer ( configuration_map [ " redis_port " ] ) ;
}
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if ( configuration_map . count ( " redis_host " ) ! = 0 ) {
redis_host = configuration_map [ " redis_host " ] ;
}
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if ( configuration_map . count ( " redis_enabled " ) ! = 0 ) {
if ( configuration_map [ " redis_enabled " ] = = " yes " ) {
redis_enabled = true ;
} else {
redis_enabled = false ;
}
}
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# endif
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if ( configuration_map . count ( " ban_details_records_count " ) ! = 0 ) {
ban_details_records_count = convert_string_to_integer ( configuration_map [ " ban_details_records_count " ] ) ;
}
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if ( configuration_map . count ( " check_period " ) ! = 0 ) {
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check_period = convert_string_to_integer ( configuration_map [ " check_period " ] ) ;
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}
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if ( configuration_map . count ( " sort_parameter " ) ! = 0 ) {
sort_parameter = configuration_map [ " sort_parameter " ] ;
}
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if ( configuration_map . count ( " max_ips_in_list " ) ! = 0 ) {
max_ips_in_list = convert_string_to_integer ( configuration_map [ " max_ips_in_list " ] ) ;
}
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if ( configuration_map . count ( " notify_script_path " ) ! = 0 ) {
notify_script_path = configuration_map [ " notify_script_path " ] ;
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}
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return true ;
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}
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/* Enable core dumps for simplify debug tasks */
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void enable_core_dumps ( ) {
struct rlimit rlim ;
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int result = getrlimit ( RLIMIT_CORE , & rlim ) ;
if ( result ) {
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logger < < log4cpp : : Priority : : ERROR < < " Can't get current rlimit for RLIMIT_CORE " ;
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return ;
} else {
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rlim . rlim_cur = rlim . rlim_max ;
setrlimit ( RLIMIT_CORE , & rlim ) ;
}
}
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void subnet_vectors_allocator ( prefix_t * prefix , void * data ) {
// Network byte order
uint32_t subnet_as_integer = prefix - > add . sin . s_addr ;
u_short bitlen = prefix - > bitlen ;
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double base = 2 ;
int network_size_in_ips = pow ( base , 32 - bitlen ) ;
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//logger<< log4cpp::Priority::INFO<<"Subnet: "<<prefix->add.sin.s_addr<<" network size: "<<network_size_in_ips;
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logger < < log4cpp : : Priority : : INFO < < " I will allocate " < < network_size_in_ips < < " records for subnet " < < subnet_as_integer < < " cidr mask: " < < bitlen ;
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// Initialize map element
SubnetVectorMap [ subnet_as_integer ] = vector_of_counters ( network_size_in_ips ) ;
// Zeroify all vector elements
map_element zero_map_element ;
memset ( & zero_map_element , 0 , sizeof ( zero_map_element ) ) ;
std : : fill ( SubnetVectorMap [ subnet_as_integer ] . begin ( ) , SubnetVectorMap [ subnet_as_integer ] . end ( ) , zero_map_element ) ;
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// Initilize map element
SubnetVectorMapFlow [ subnet_as_integer ] = vector_of_flow_counters ( network_size_in_ips ) ;
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// On creating it initilizes by zeros
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conntrack_main_struct zero_conntrack_main_struct ;
std : : fill ( SubnetVectorMapFlow [ subnet_as_integer ] . begin ( ) , SubnetVectorMapFlow [ subnet_as_integer ] . end ( ) , zero_conntrack_main_struct ) ;
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}
void zeroify_all_counters ( ) {
map_element zero_map_element ;
memset ( & zero_map_element , 0 , sizeof ( zero_map_element ) ) ;
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for ( map_of_vector_counters : : iterator itr = SubnetVectorMap . begin ( ) ; itr ! = SubnetVectorMap . end ( ) ; + + itr ) {
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//logger<< log4cpp::Priority::INFO<<"Zeroify "<<itr->first;
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std : : fill ( itr - > second . begin ( ) , itr - > second . end ( ) , zero_map_element ) ;
}
}
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void zeroify_all_flow_counters ( ) {
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// On creating it initilizes by zeros
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conntrack_main_struct zero_conntrack_main_struct ;
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// Iterate over map
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for ( map_of_vector_counters_for_flow : : iterator itr = SubnetVectorMapFlow . begin ( ) ; itr ! = SubnetVectorMapFlow . end ( ) ; + + itr ) {
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// Iterate over vector
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for ( vector_of_flow_counters : : iterator vector_iterator = itr - > second . begin ( ) ; vector_iterator ! = itr - > second . end ( ) ; + + vector_iterator ) {
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// TODO: rewrite this monkey code
vector_iterator - > in_tcp . clear ( ) ;
vector_iterator - > in_udp . clear ( ) ;
vector_iterator - > in_icmp . clear ( ) ;
vector_iterator - > in_other . clear ( ) ;
vector_iterator - > out_tcp . clear ( ) ;
vector_iterator - > out_udp . clear ( ) ;
vector_iterator - > out_icmp . clear ( ) ;
vector_iterator - > out_other . clear ( ) ;
}
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}
}
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bool load_our_networks_list ( ) {
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if ( file_exists ( " /etc/networks_whitelist " ) ) {
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std : : vector < std : : string > network_list_from_config = read_file_to_vector ( " /etc/networks_whitelist " ) ;
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for ( std : : vector < std : : string > : : iterator ii = network_list_from_config . begin ( ) ; ii ! = network_list_from_config . end ( ) ; + + ii ) {
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if ( ii - > length ( ) > 0 & & is_cidr_subnet ( ii - > c_str ( ) ) ) {
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make_and_lookup ( whitelist_tree , const_cast < char * > ( ii - > c_str ( ) ) ) ;
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} else {
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logger < < log4cpp : : Priority : : ERROR < < " Can't parse line from whitelist: " < < * ii ;
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}
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}
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logger < < log4cpp : : Priority : : INFO < < " We loaded " < < network_list_from_config . size ( ) < < " networks from whitelist file " ;
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}
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std : : vector < std : : string > networks_list_as_string ;
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// We can bould "our subnets" automatically here
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if ( file_exists ( " /proc/vz/version " ) ) {
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logger < < log4cpp : : Priority : : INFO < < " We found OpenVZ " ;
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// Add /32 CIDR mask for every IP here
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std : : vector < std : : string > openvz_ips = read_file_to_vector ( " /proc/vz/veip " ) ;
for ( std : : vector < std : : string > : : iterator ii = openvz_ips . begin ( ) ; ii ! = openvz_ips . end ( ) ; + + ii ) {
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// skip IPv6 addresses
if ( strstr ( ii - > c_str ( ) , " : " ) ! = NULL ) {
continue ;
}
// skip header
if ( strstr ( ii - > c_str ( ) , " Version " ) ! = NULL ) {
continue ;
}
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std : : vector < std : : string > subnet_as_string ;
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split ( subnet_as_string , * ii , boost : : is_any_of ( " " ) , boost : : token_compress_on ) ;
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std : : string openvz_subnet = subnet_as_string [ 1 ] + " /32 " ;
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networks_list_as_string . push_back ( openvz_subnet ) ;
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}
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logger < < log4cpp : : Priority : : INFO < < " We loaded " < < networks_list_as_string . size ( ) < < " networks from /proc/vz/version " ;
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}
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if ( file_exists ( " /etc/networks_list " ) ) {
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std : : vector < std : : string > network_list_from_config = read_file_to_vector ( " /etc/networks_list " ) ;
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networks_list_as_string . insert ( networks_list_as_string . end ( ) , network_list_from_config . begin ( ) , network_list_from_config . end ( ) ) ;
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logger < < log4cpp : : Priority : : INFO < < " We loaded " < < network_list_from_config . size ( ) < < " networks from networks file " ;
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}
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// Some consistency checks
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assert ( convert_ip_as_string_to_uint ( " 255.255.255.0 " ) = = convert_cidr_to_binary_netmask ( 24 ) ) ;
assert ( convert_ip_as_string_to_uint ( " 255.255.255.255 " ) = = convert_cidr_to_binary_netmask ( 32 ) ) ;
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for ( std : : vector < std : : string > : : iterator ii = networks_list_as_string . begin ( ) ; ii ! = networks_list_as_string . end ( ) ; + + ii ) {
if ( ii - > length ( ) = = 0 ) {
// Skip blank lines in subnet list file silently
continue ;
}
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if ( ! is_cidr_subnet ( ii - > c_str ( ) ) ) {
logger < < log4cpp : : Priority : : ERROR < < " Can't parse line from subnet list: ' " < < * ii < < " ' " ;
continue ;
}
std : : string network_address_in_cidr_form = * ii ;
unsigned int cidr_mask = get_cidr_mask_from_network_as_string ( network_address_in_cidr_form ) ;
std : : string network_address = get_net_address_from_network_as_string ( network_address_in_cidr_form ) ;
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double base = 2 ;
total_number_of_hosts_in_our_networks + = pow ( base , 32 - cidr_mask ) ;
// Make sure it's "subnet address" and not an host address
uint32_t subnet_address_as_uint = convert_ip_as_string_to_uint ( network_address ) ;
uint32_t subnet_address_netmask_binary = convert_cidr_to_binary_netmask ( cidr_mask ) ;
uint32_t generated_subnet_address = subnet_address_as_uint & subnet_address_netmask_binary ;
if ( subnet_address_as_uint ! = generated_subnet_address ) {
std : : string new_network_address_as_string
= convert_ip_as_uint_to_string ( generated_subnet_address ) + " / " + convert_int_to_string ( cidr_mask ) ;
logger < < log4cpp : : Priority : : WARN < < " We will use " < < new_network_address_as_string
< < " instead of " < < network_address_in_cidr_form < < " because it's host address " ;
network_address_in_cidr_form = new_network_address_as_string ;
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}
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make_and_lookup ( lookup_tree , const_cast < char * > ( network_address_in_cidr_form . c_str ( ) ) ) ;
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}
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/* Preallocate data structures */
patricia_process ( lookup_tree , ( void_fn_t ) subnet_vectors_allocator ) ;
logger < < log4cpp : : Priority : : INFO < < " We start total zerofication of counters " ;
zeroify_all_counters ( ) ;
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logger < < log4cpp : : Priority : : INFO < < " We finished zerofication " ;
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logger < < log4cpp : : Priority : : INFO < < " We loaded " < < networks_list_as_string . size ( ) < < " subnets to our in-memory list of networks " ;
logger < < log4cpp : : Priority : : INFO < < " Total number of monitored hosts (total size of all networks): "
< < total_number_of_hosts_in_our_networks ;
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return true ;
}
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// extract 24 from 192.168.1.1/24
2015-01-27 20:29:51 +01:00
unsigned int get_cidr_mask_from_network_as_string ( std : : string network_cidr_format ) {
std : : vector < std : : string > subnet_as_string ;
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split ( subnet_as_string , network_cidr_format , boost : : is_any_of ( " / " ) , boost : : token_compress_on ) ;
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2014-12-16 11:56:08 +01:00
if ( subnet_as_string . size ( ) ! = 2 ) {
return 0 ;
}
return convert_string_to_integer ( subnet_as_string [ 1 ] ) ;
2014-06-30 10:49:55 +02:00
}
2015-02-18 20:31:55 +01:00
// extract 192.168.1.1 from 192.168.1.1/24
std : : string get_net_address_from_network_as_string ( std : : string network_cidr_format ) {
std : : vector < std : : string > subnet_as_string ;
split ( subnet_as_string , network_cidr_format , boost : : is_any_of ( " / " ) , boost : : token_compress_on ) ;
if ( subnet_as_string . size ( ) ! = 2 ) {
return 0 ;
}
return subnet_as_string [ 0 ] ;
}
2015-01-27 20:29:51 +01:00
void copy_networks_from_string_form_to_binary ( std : : vector < std : : string > networks_list_as_string , std : : vector < subnet > & our_networks ) {
for ( std : : vector < std : : string > : : iterator ii = networks_list_as_string . begin ( ) ; ii ! = networks_list_as_string . end ( ) ; + + ii ) {
std : : vector < std : : string > subnet_as_string ;
2013-10-18 12:16:55 +02:00
split ( subnet_as_string , * ii , boost : : is_any_of ( " / " ) , boost : : token_compress_on ) ;
2014-07-04 10:02:44 +02:00
unsigned int cidr = convert_string_to_integer ( subnet_as_string [ 1 ] ) ;
2013-10-18 12:16:55 +02:00
uint32_t subnet_as_int = convert_ip_as_string_to_uint ( subnet_as_string [ 0 ] ) ;
uint32_t netmask_as_int = convert_cidr_to_binary_netmask ( cidr ) ;
subnet current_subnet = std : : make_pair ( subnet_as_int , netmask_as_int ) ;
2013-11-15 03:13:41 +01:00
our_networks . push_back ( current_subnet ) ;
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}
}
2013-10-18 12:16:55 +02:00
2014-07-04 10:02:44 +02:00
uint32_t convert_cidr_to_binary_netmask ( unsigned int cidr ) {
2013-10-18 12:16:55 +02:00
uint32_t binary_netmask = 0xFFFFFFFF ;
binary_netmask = binary_netmask < < ( 32 - cidr ) ;
// htonl from host byte order to network
// ntohl from network byte order to host
2014-11-15 01:10:04 +01:00
// We need network byte order at output
2013-10-18 12:16:55 +02:00
return htonl ( binary_netmask ) ;
}
2015-01-27 20:29:51 +01:00
std : : string get_printable_protocol_name ( unsigned int protocol ) {
std : : string proto_name ;
2014-12-05 16:01:17 +01:00
switch ( protocol ) {
2013-10-18 15:28:00 +02:00
case IPPROTO_TCP :
proto_name = " tcp " ;
break ;
case IPPROTO_UDP :
proto_name = " udp " ;
break ;
case IPPROTO_ICMP :
proto_name = " icmp " ;
break ;
default :
proto_name = " unknown " ;
break ;
2014-12-05 16:01:17 +01:00
}
return proto_name ;
}
2015-01-27 20:29:51 +01:00
std : : string print_simple_packet ( simple_packet packet ) {
2014-12-05 16:01:17 +01:00
std : : stringstream buffer ;
2014-10-23 10:51:01 +02:00
buffer < < convert_timeval_to_date ( packet . ts ) < < " " ;
2013-10-18 15:28:00 +02:00
2013-10-19 16:01:24 +02:00
buffer
2013-10-19 15:41:21 +02:00
< < convert_ip_as_uint_to_string ( packet . src_ip ) < < " : " < < packet . source_port
< < " > "
< < convert_ip_as_uint_to_string ( packet . dst_ip ) < < " : " < < packet . destination_port
2014-12-05 16:01:17 +01:00
< < " protocol: " < < get_printable_protocol_name ( packet . protocol ) ;
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// Print flags only for TCP
if ( packet . protocol = = IPPROTO_TCP ) {
buffer < < " flags: " < < print_tcp_flags ( packet . flags ) ;
}
2015-02-03 15:02:54 +01:00
buffer < < " " ;
buffer < < " packets: " < < packet . number_of_packets < < " " ;
buffer < < " size: " < < packet . length < < " bytes " ;
buffer < < " sample ratio: " < < packet . sample_ratio < < " " ;
buffer < < " \n " ;
2014-11-15 01:10:04 +01:00
2013-10-19 16:01:24 +02:00
return buffer . str ( ) ;
2013-10-18 15:28:00 +02:00
}
2014-11-15 01:10:04 +01:00
/* Process simple unified packet */
2014-06-21 16:11:53 +02:00
void process_packet ( simple_packet & current_packet ) {
2014-06-20 17:18:27 +02:00
// Packets dump is very useful for bug hunting
if ( DEBUG_DUMP_ALL_PACKETS ) {
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logger < < log4cpp : : Priority : : INFO < < " Dump: " < < print_simple_packet ( current_packet ) ;
2014-06-20 17:18:27 +02:00
}
2013-10-18 15:28:00 +02:00
2014-10-23 16:08:58 +02:00
// Subnet for found IPs
unsigned long subnet = 0 ;
direction packet_direction = get_packet_direction ( current_packet . src_ip , current_packet . dst_ip , subnet ) ;
2015-01-28 08:49:12 +01:00
// Skip processing of specific traffic direction
if ( ( packet_direction = = INCOMING & & ! process_incoming_traffic ) or ( packet_direction = = OUTGOING & & ! process_outgoing_traffic ) ) {
return ;
}
2014-10-23 16:08:58 +02:00
uint32_t subnet_in_host_byte_order = 0 ;
// We operate in host bytes order and need to convert subnet
if ( subnet ! = 0 ) {
subnet_in_host_byte_order = ntohl ( subnet ) ;
}
// Try to find map key for this subnet
map_of_vector_counters : : iterator itr ;
if ( packet_direction = = OUTGOING or packet_direction = = INCOMING ) {
itr = SubnetVectorMap . find ( subnet ) ;
if ( itr = = SubnetVectorMap . end ( ) ) {
2014-12-19 09:43:22 +01:00
logger < < log4cpp : : Priority : : ERROR < < " Can't find vector address in subnet map " ;
2014-10-23 16:08:58 +02:00
return ;
}
}
2013-10-21 21:45:33 +02:00
2014-11-13 14:13:28 +01:00
map_of_vector_counters_for_flow : : iterator itr_flow ;
2014-12-02 11:50:05 +01:00
if ( enable_conection_tracking ) {
if ( packet_direction = = OUTGOING or packet_direction = = INCOMING ) {
itr_flow = SubnetVectorMapFlow . find ( subnet ) ;
2014-11-13 14:13:28 +01:00
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if ( itr_flow = = SubnetVectorMapFlow . end ( ) ) {
2014-12-19 09:43:22 +01:00
logger < < log4cpp : : Priority : : ERROR < < " Can't find vector address in subnet flow map " ;
2014-12-02 11:50:05 +01:00
return ;
}
2014-11-13 14:13:28 +01:00
}
}
2015-01-26 09:09:03 +01:00
/* Because we support mirroring, sflow and netflow we should support different cases:
- One packet passed for processing ( mirror )
- Multiple packets ( " flows " ) passed for processing ( netflow )
- One sampled packed passed for processing ( netflow )
- Another combinations of this three options
*/
uint32_t sampled_number_of_packets = current_packet . number_of_packets * current_packet . sample_ratio ;
uint32_t sampled_number_of_bytes = current_packet . length * current_packet . sample_ratio ;
2014-12-02 10:30:20 +01:00
2014-12-18 16:30:10 +01:00
__sync_fetch_and_add ( & total_counters [ packet_direction ] . packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & total_counters [ packet_direction ] . bytes , sampled_number_of_bytes ) ;
2014-12-19 16:50:00 +01:00
// Incerementi main and per protocol packet counters
if ( packet_direction = = OUTGOING ) {
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int64_t shift_in_vector = ( int64_t ) ntohl ( current_packet . src_ip ) - ( int64_t ) subnet_in_host_byte_order ;
2015-01-22 17:24:36 +01:00
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if ( shift_in_vector < 0 or shift_in_vector > = itr - > second . size ( ) ) {
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logger < < log4cpp : : Priority : : ERROR < < " We tried to access to element with index " < < shift_in_vector
2015-01-23 16:27:49 +01:00
< < " which located outside allocated vector with size " < < itr - > second . size ( ) ;
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logger < < log4cpp : : Priority : : ERROR < < " We expect issues with this packet in OUTGOING direction: " < < print_simple_packet ( current_packet ) ;
2015-01-23 10:54:41 +01:00
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return ;
}
2014-12-19 16:50:00 +01:00
map_element * current_element = & itr - > second [ shift_in_vector ] ;
2014-06-26 20:27:55 +02:00
2014-12-19 16:55:43 +01:00
// Main packet/bytes counter
2014-12-19 16:50:00 +01:00
__sync_fetch_and_add ( & current_element - > out_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > out_bytes , sampled_number_of_bytes ) ;
2014-10-23 16:08:58 +02:00
2014-12-19 16:50:00 +01:00
conntrack_main_struct * current_element_flow = NULL ;
if ( enable_conection_tracking ) {
current_element_flow = & itr_flow - > second [ shift_in_vector ] ;
}
2014-06-28 12:12:56 +02:00
2014-12-19 16:50:00 +01:00
// Collect data when ban client
2015-03-15 18:58:40 +01:00
if ( ! ban_list_details . empty ( ) & & ban_list_details . count ( current_packet . src_ip ) > 0 & &
2014-12-19 16:50:00 +01:00
ban_list_details [ current_packet . src_ip ] . size ( ) < ban_details_records_count ) {
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2014-12-19 16:50:00 +01:00
ban_list_details_mutex . lock ( ) ;
ban_list_details [ current_packet . src_ip ] . push_back ( current_packet ) ;
ban_list_details_mutex . unlock ( ) ;
}
2014-12-02 11:50:05 +01:00
2014-12-19 16:50:00 +01:00
uint64_t connection_tracking_hash = 0 ;
2013-10-18 15:28:00 +02:00
2014-12-19 16:50:00 +01:00
if ( enable_conection_tracking ) {
packed_conntrack_hash flow_tracking_structure ;
flow_tracking_structure . opposite_ip = current_packet . dst_ip ;
flow_tracking_structure . src_port = current_packet . source_port ;
flow_tracking_structure . dst_port = current_packet . destination_port ;
2014-11-13 16:01:15 +01:00
2014-12-19 16:50:00 +01:00
// convert this struct to 64 bit integer
connection_tracking_hash = convert_conntrack_hash_struct_to_integer ( & flow_tracking_structure ) ;
}
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if ( current_packet . protocol = = IPPROTO_TCP ) {
__sync_fetch_and_add ( & current_element - > tcp_out_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > tcp_out_bytes , sampled_number_of_bytes ) ;
2014-12-18 16:30:10 +01:00
2014-12-19 16:50:00 +01:00
if ( enable_conection_tracking ) {
flow_counter . lock ( ) ;
conntrack_key_struct * conntrack_key_struct_ptr = & current_element_flow - > out_tcp [ connection_tracking_hash ] ;
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conntrack_key_struct_ptr - > packets + = sampled_number_of_packets ;
conntrack_key_struct_ptr - > bytes + = sampled_number_of_bytes ;
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flow_counter . unlock ( ) ;
}
} else if ( current_packet . protocol = = IPPROTO_UDP ) {
__sync_fetch_and_add ( & current_element - > udp_out_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > udp_out_bytes , sampled_number_of_bytes ) ;
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if ( enable_conection_tracking ) {
flow_counter . lock ( ) ;
conntrack_key_struct * conntrack_key_struct_ptr = & current_element_flow - > out_udp [ connection_tracking_hash ] ;
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conntrack_key_struct_ptr - > packets + = sampled_number_of_packets ;
conntrack_key_struct_ptr - > bytes + = sampled_number_of_bytes ;
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flow_counter . unlock ( ) ;
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}
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} else if ( current_packet . protocol = = IPPROTO_ICMP ) {
__sync_fetch_and_add ( & current_element - > icmp_out_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > icmp_out_bytes , sampled_number_of_bytes ) ;
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// no flow tracking for icmp
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} else {
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}
} else if ( packet_direction = = INCOMING ) {
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int64_t shift_in_vector = ( int64_t ) ntohl ( current_packet . dst_ip ) - ( int64_t ) subnet_in_host_byte_order ;
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if ( shift_in_vector < 0 or shift_in_vector > = itr - > second . size ( ) ) {
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logger < < log4cpp : : Priority : : ERROR < < " We tried to access to element with index " < < shift_in_vector
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< < " which located outside allocated vector with size " < < itr - > second . size ( ) ;
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logger < < log4cpp : : Priority : : INFO < < " We expect issues with this packet in INCOMING direction: " < < print_simple_packet ( current_packet ) ;
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return ;
}
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map_element * current_element = & itr - > second [ shift_in_vector ] ;
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// Main packet/bytes counter
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__sync_fetch_and_add ( & current_element - > in_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > in_bytes , sampled_number_of_bytes ) ;
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conntrack_main_struct * current_element_flow = NULL ;
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if ( enable_conection_tracking ) {
current_element_flow = & itr_flow - > second [ shift_in_vector ] ;
}
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uint64_t connection_tracking_hash = 0 ;
if ( enable_conection_tracking ) {
packed_conntrack_hash flow_tracking_structure ;
flow_tracking_structure . opposite_ip = current_packet . src_ip ;
flow_tracking_structure . src_port = current_packet . source_port ;
flow_tracking_structure . dst_port = current_packet . destination_port ;
// convert this struct to 64 bit integer
connection_tracking_hash = convert_conntrack_hash_struct_to_integer ( & flow_tracking_structure ) ;
}
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// Collect attack details
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if ( ! ban_list_details . empty ( ) & & ban_list_details . count ( current_packet . dst_ip ) > 0 & &
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ban_list_details [ current_packet . dst_ip ] . size ( ) < ban_details_records_count ) {
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ban_list_details_mutex . lock ( ) ;
ban_list_details [ current_packet . dst_ip ] . push_back ( current_packet ) ;
ban_list_details_mutex . unlock ( ) ;
}
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if ( current_packet . protocol = = IPPROTO_TCP ) {
__sync_fetch_and_add ( & current_element - > tcp_in_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > tcp_in_bytes , sampled_number_of_bytes ) ;
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if ( enable_conection_tracking ) {
flow_counter . lock ( ) ;
conntrack_key_struct * conntrack_key_struct_ptr = & current_element_flow - > in_tcp [ connection_tracking_hash ] ;
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conntrack_key_struct_ptr - > packets + = sampled_number_of_packets ;
conntrack_key_struct_ptr - > bytes + = sampled_number_of_bytes ;
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flow_counter . unlock ( ) ;
}
} else if ( current_packet . protocol = = IPPROTO_UDP ) {
__sync_fetch_and_add ( & current_element - > udp_in_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > udp_in_bytes , sampled_number_of_bytes ) ;
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if ( enable_conection_tracking ) {
flow_counter . lock ( ) ;
conntrack_key_struct * conntrack_key_struct_ptr = & current_element_flow - > in_udp [ connection_tracking_hash ] ;
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conntrack_key_struct_ptr - > packets + = sampled_number_of_packets ;
conntrack_key_struct_ptr - > bytes + = sampled_number_of_bytes ;
flow_counter . unlock ( ) ;
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}
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} else if ( current_packet . protocol = = IPPROTO_ICMP ) {
__sync_fetch_and_add ( & current_element - > icmp_in_packets , sampled_number_of_packets ) ;
__sync_fetch_and_add ( & current_element - > icmp_in_bytes , sampled_number_of_bytes ) ;
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// no flow tarcking for icmp
} else {
// TBD
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}
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} else if ( packet_direction = = INTERNAL ) {
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}
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}
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# ifdef GEOIP
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unsigned int get_asn_for_ip ( uint32_t ip ) {
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char * asn_raw = GeoIP_org_by_name ( geo_ip , convert_ip_as_uint_to_string ( remote_ip ) . c_str ( ) ) ;
uint32_t asn_number = 0 ;
if ( asn_raw = = NULL ) {
asn_number = 0 ;
} else {
// split string: AS1299 TeliaSonera International Carrier
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std : : vector < std : : string > asn_as_string ;
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split ( asn_as_string , asn_raw , boost : : is_any_of ( " " ) , boost : : token_compress_on ) ;
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// free up original string
free ( asn_raw ) ;
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// extract raw number
asn_number = convert_string_to_integer ( asn_as_string [ 0 ] . substr ( 2 ) ) ;
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}
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return asn_number ;
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}
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# endif
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// void* void* data
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// It's not an calculation thread, it's vizualization thread :)
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void calculation_thread ( ) {
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// we need wait one second for calculating speed by recalculate_speed
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//#include <sys/prctl.h>
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//prctl(PR_SET_NAME , "fastnetmon calc thread", 0, 0, 0);
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// Sleep for a half second for shift against calculatiuon thread
boost : : this_thread : : sleep ( boost : : posix_time : : milliseconds ( 500 ) ) ;
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while ( 1 ) {
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// Availible only from boost 1.54: boost::this_thread::sleep_for( boost::chrono::seconds(check_period) );
boost : : this_thread : : sleep ( boost : : posix_time : : seconds ( check_period ) ) ;
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traffic_draw_programm ( ) ;
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}
}
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void recalculate_speed_thread_handler ( ) {
while ( 1 ) {
// recalculate data every one second
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// Availible only from boost 1.54: boost::this_thread::sleep_for( boost::chrono::seconds(1) );
boost : : this_thread : : sleep ( boost : : posix_time : : seconds ( 1 ) ) ;
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recalculate_speed ( ) ;
}
}
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/* Calculate speed for all connnections */
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void recalculate_speed ( ) {
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//logger<< log4cpp::Priority::INFO<<"We run recalculate_speed";
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struct timeval start_calc_time ;
gettimeofday ( & start_calc_time , NULL ) ;
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double speed_calc_period = 1 ;
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time_t start_time ;
time ( & start_time ) ;
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// If we got 1+ seconds lag we should use new "delta" or skip this step
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double time_difference = difftime ( start_time , last_call_of_traffic_recalculation ) ;
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if ( time_difference < 1 ) {
// It could occur on programm start
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logger < < log4cpp : : Priority : : INFO < < " We skip one iteration of speed_calc because it runs so early! " ;
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return ;
} else if ( int ( time_difference ) = = 1 ) {
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// All fine, we run on time
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} else {
logger < < log4cpp : : Priority : : INFO < < " Time from last run of speed_recalc is soooo big, we got ugly lags: " < < time_difference ;
speed_calc_period = time_difference ;
}
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map_element zero_map_element ;
memset ( & zero_map_element , 0 , sizeof ( zero_map_element ) ) ;
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uint64_t incoming_total_flows = 0 ;
uint64_t outgoing_total_flows = 0 ;
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for ( map_of_vector_counters : : iterator itr = SubnetVectorMap . begin ( ) ; itr ! = SubnetVectorMap . end ( ) ; + + itr ) {
for ( vector_of_counters : : iterator vector_itr = itr - > second . begin ( ) ; vector_itr ! = itr - > second . end ( ) ; + + vector_itr ) {
int current_index = vector_itr - itr - > second . begin ( ) ;
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// New element
map_element new_speed_element ;
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// convert to host order for math operations
uint32_t subnet_ip = ntohl ( itr - > first ) ;
uint32_t client_ip_in_host_bytes_order = subnet_ip + current_index ;
// covnert to our standard network byte order
uint32_t client_ip = htonl ( client_ip_in_host_bytes_order ) ;
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new_speed_element . in_packets = uint64_t ( ( double ) vector_itr - > in_packets / speed_calc_period ) ;
new_speed_element . out_packets = uint64_t ( ( double ) vector_itr - > out_packets / speed_calc_period ) ;
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new_speed_element . in_bytes = uint64_t ( ( double ) vector_itr - > in_bytes / speed_calc_period ) ;
new_speed_element . out_bytes = uint64_t ( ( double ) vector_itr - > out_bytes / speed_calc_period ) ;
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// By protocol counters
// TCP
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new_speed_element . tcp_in_packets = uint64_t ( ( double ) vector_itr - > tcp_in_packets / speed_calc_period ) ;
new_speed_element . tcp_out_packets = uint64_t ( ( double ) vector_itr - > tcp_out_packets / speed_calc_period ) ;
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new_speed_element . tcp_in_bytes = uint64_t ( ( double ) vector_itr - > tcp_in_bytes / speed_calc_period ) ;
new_speed_element . tcp_out_bytes = uint64_t ( ( double ) vector_itr - > tcp_out_bytes / speed_calc_period ) ;
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// UDP
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new_speed_element . udp_in_packets = uint64_t ( ( double ) vector_itr - > udp_in_packets / speed_calc_period ) ;
new_speed_element . udp_out_packets = uint64_t ( ( double ) vector_itr - > udp_out_packets / speed_calc_period ) ;
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new_speed_element . udp_in_bytes = uint64_t ( ( double ) vector_itr - > udp_in_bytes / speed_calc_period ) ;
new_speed_element . udp_out_bytes = uint64_t ( ( double ) vector_itr - > udp_out_bytes / speed_calc_period ) ;
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// ICMP
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new_speed_element . icmp_in_packets = uint64_t ( ( double ) vector_itr - > icmp_in_packets / speed_calc_period ) ;
new_speed_element . icmp_out_packets = uint64_t ( ( double ) vector_itr - > icmp_out_packets / speed_calc_period ) ;
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new_speed_element . icmp_in_bytes = uint64_t ( ( double ) vector_itr - > icmp_in_bytes / speed_calc_period ) ;
new_speed_element . icmp_out_bytes = uint64_t ( ( double ) vector_itr - > icmp_out_bytes / speed_calc_period ) ;
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conntrack_main_struct * flow_counter_ptr = & SubnetVectorMapFlow [ itr - > first ] [ current_index ] ;
// todo: optimize this operations!
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uint64_t total_out_flows =
( uint64_t ) flow_counter_ptr - > out_tcp . size ( ) +
( uint64_t ) flow_counter_ptr - > out_udp . size ( ) +
( uint64_t ) flow_counter_ptr - > out_icmp . size ( ) +
( uint64_t ) flow_counter_ptr - > out_other . size ( ) ;
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uint64_t total_in_flows =
( uint64_t ) flow_counter_ptr - > in_tcp . size ( ) +
( uint64_t ) flow_counter_ptr - > in_udp . size ( ) +
( uint64_t ) flow_counter_ptr - > in_icmp . size ( ) +
( uint64_t ) flow_counter_ptr - > in_other . size ( ) ;
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new_speed_element . out_flows = uint64_t ( ( double ) total_out_flows / speed_calc_period ) ;
new_speed_element . in_flows = uint64_t ( ( double ) total_in_flows / speed_calc_period ) ;
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// Increment global counter
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incoming_total_flows + = new_speed_element . in_flows ;
outgoing_total_flows + = new_speed_element . out_flows ;
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2014-12-02 15:46:46 +01:00
/* Moving average recalculation */
// http://en.wikipedia.org/wiki/Moving_average#Application_to_measuring_computer_performance
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//double speed_calc_period = 1;
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double exp_power = - speed_calc_period / average_calculation_amount ;
double exp_value = exp ( exp_power ) ;
map_element * current_average_speed_element = & SpeedCounterAverage [ client_ip ] ;
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current_average_speed_element - > in_bytes = uint64_t ( new_speed_element . in_bytes + exp_value *
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( ( double ) current_average_speed_element - > in_bytes - ( double ) new_speed_element . in_bytes ) ) ;
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current_average_speed_element - > out_bytes = uint64_t ( new_speed_element . out_bytes + exp_value *
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( ( double ) current_average_speed_element - > out_bytes - ( double ) new_speed_element . out_bytes ) ) ;
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current_average_speed_element - > in_packets = uint64_t ( new_speed_element . in_packets + exp_value *
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( ( double ) current_average_speed_element - > in_packets - ( double ) new_speed_element . in_packets ) ) ;
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current_average_speed_element - > out_packets = uint64_t ( new_speed_element . out_packets + exp_value *
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( ( double ) current_average_speed_element - > out_packets - ( double ) new_speed_element . out_packets ) ) ;
2014-12-02 16:15:26 +01:00
2014-12-16 15:20:04 +01:00
current_average_speed_element - > out_flows = uint64_t ( new_speed_element . out_flows + exp_value *
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( ( double ) current_average_speed_element - > out_flows - ( double ) new_speed_element . out_flows ) ) ;
2014-12-16 15:20:04 +01:00
current_average_speed_element - > in_flows = uint64_t ( new_speed_element . in_flows + exp_value *
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( ( double ) current_average_speed_element - > in_flows - ( double ) new_speed_element . in_flows ) ) ;
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2014-12-02 16:34:49 +01:00
/* Moving average recalculation end */
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2015-03-13 16:25:13 +01:00
if ( we_should_ban_this_ip ( current_average_speed_element ) ) {
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std : : string flow_attack_details = " " ;
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if ( enable_conection_tracking ) {
flow_attack_details = print_flow_tracking_for_ip ( * flow_counter_ptr , convert_ip_as_uint_to_string ( client_ip ) ) ;
}
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// TODO: we should pass type of ddos ban source (pps, flowd, bandwidth)!
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execute_ip_ban ( client_ip , new_speed_element , * current_average_speed_element , flow_attack_details ) ;
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}
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speed_counters_mutex . lock ( ) ;
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//map_element* current_speed_element = &SpeedCounter[client_ip];
//*current_speed_element = new_speed_element;
SpeedCounter [ client_ip ] = new_speed_element ;
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speed_counters_mutex . unlock ( ) ;
data_counters_mutex . lock ( ) ;
* vector_itr = zero_map_element ;
data_counters_mutex . unlock ( ) ;
}
}
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// Calculate global flow speed
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incoming_total_flows_speed = uint64_t ( ( double ) incoming_total_flows / ( double ) speed_calc_period ) ;
outgoing_total_flows_speed = uint64_t ( ( double ) outgoing_total_flows / ( double ) speed_calc_period ) ;
2014-11-14 11:45:14 +01:00
2014-12-02 11:50:05 +01:00
if ( enable_conection_tracking ) {
// Clean Flow Counter
flow_counter . lock ( ) ;
zeroify_all_flow_counters ( ) ;
flow_counter . unlock ( ) ;
}
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for ( unsigned int index = 0 ; index < 4 ; index + + ) {
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total_speed_counters [ index ] . bytes = uint64_t ( ( double ) total_counters [ index ] . bytes / ( double ) speed_calc_period ) ;
total_speed_counters [ index ] . packets = uint64_t ( ( double ) total_counters [ index ] . packets / ( double ) speed_calc_period ) ;
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// nullify data counters after speed calculation
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//total_counters_mutex.lock();
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total_counters [ index ] . bytes = 0 ;
total_counters [ index ] . packets = 0 ;
2014-12-18 16:30:10 +01:00
//total_counters_mutex.unlock();
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}
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// Set time of previous startup
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time ( & last_call_of_traffic_recalculation ) ;
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struct timeval finish_calc_time ;
gettimeofday ( & finish_calc_time , NULL ) ;
timeval_subtract ( & speed_calculation_time , & finish_calc_time , & start_calc_time ) ;
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}
2014-06-09 14:47:11 +02:00
2015-01-27 20:29:51 +01:00
void print_screen_contents_into_file ( std : : string screen_data_stats_param ) {
std : : ofstream screen_data_file ;
screen_data_file . open ( " /tmp/fastnetmon.dat " , std : : ios : : trunc ) ;
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if ( screen_data_file . is_open ( ) ) {
screen_data_file < < screen_data_stats_param ;
screen_data_file . close ( ) ;
} else {
logger < < log4cpp : : Priority : : ERROR < < " Can't print programm screen into file " ;
}
}
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void traffic_draw_programm ( ) {
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std : : stringstream output_buffer ;
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//logger<<log4cpp::Priority::INFO<<"Draw table call";
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struct timeval start_calc_time ;
gettimeofday ( & start_calc_time , NULL ) ;
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sort_type sorter ;
if ( sort_parameter = = " packets " ) {
sorter = PACKETS ;
} else if ( sort_parameter = = " bytes " ) {
sorter = BYTES ;
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} else if ( sort_parameter = = " flows " ) {
sorter = FLOWS ;
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} else {
logger < < log4cpp : : Priority : : INFO < < " Unexpected sorter type: " < < sort_parameter ;
sorter = PACKETS ;
}
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output_buffer < < " FastNetMon v1.0 FastVPS Eesti OU (c) VPS and dedicated: http://FastVPS.host " < < " \n "
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< < " IPs ordered by: " < < sort_parameter < < " \n " ;
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output_buffer < < print_channel_speed ( " Incoming traffic " , INCOMING ) < < std : : endl ;
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output_buffer < < draw_table ( SpeedCounter , INCOMING , true , sorter ) ;
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output_buffer < < std : : endl ;
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output_buffer < < print_channel_speed ( " Outgoing traffic " , OUTGOING ) < < std : : endl ;
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output_buffer < < draw_table ( SpeedCounter , OUTGOING , false , sorter ) ;
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output_buffer < < std : : endl ;
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output_buffer < < print_channel_speed ( " Internal traffic " , INTERNAL ) < < std : : endl ;
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output_buffer < < std : : endl ;
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output_buffer < < print_channel_speed ( " Other traffic " , OTHER ) < < std : : endl ;
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output_buffer < < std : : endl ;
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if ( enable_pcap_collection ) {
output_buffer < < get_pcap_stats ( ) < < " \n " ;
}
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// Application statistics
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output_buffer < < " Screen updated in: \t \t " < < drawing_thread_execution_time . tv_sec < < " sec " < < drawing_thread_execution_time . tv_usec < < " microseconds \n " ;
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output_buffer < < " Traffic calculated in: \t \t " < < speed_calculation_time . tv_sec < < " sec " < < speed_calculation_time . tv_usec < < " microseconds \n " ;
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output_buffer < < " Total amount of not processed packets: " < < total_unparsed_packets < < " \n " ;
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# ifdef PF_RING
if ( enable_data_collection_from_mirror ) {
output_buffer < < get_pf_ring_stats ( ) ;
}
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# endif
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// Print thresholds
output_buffer < < " \n \n " < < print_ban_thresholds ( ) ;
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if ( ! ban_list . empty ( ) ) {
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output_buffer < < std : : endl < < " Ban list: " < < std : : endl ;
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output_buffer < < print_ddos_attack_details ( ) ;
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}
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screen_data_stats = output_buffer . str ( ) ;
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// Print screen contents into file
print_screen_contents_into_file ( screen_data_stats ) ;
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struct timeval end_calc_time ;
gettimeofday ( & end_calc_time , NULL ) ;
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timeval_subtract ( & drawing_thread_execution_time , & end_calc_time , & start_calc_time ) ;
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}
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// pretty print channel speed in pps and MBit
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std : : string print_channel_speed ( std : : string traffic_type , direction packet_direction ) {
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uint64_t speed_in_pps = total_speed_counters [ packet_direction ] . packets ;
uint64_t speed_in_bps = total_speed_counters [ packet_direction ] . bytes ;
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unsigned int number_of_tabs = 1 ;
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// We need this for correct alignment of blocks
if ( traffic_type = = " Other traffic " ) {
number_of_tabs = 2 ;
}
std : : stringstream stream ;
stream < < traffic_type ;
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for ( unsigned int i = 0 ; i < number_of_tabs ; i + + ) {
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stream < < " \t " ;
}
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uint64_t speed_in_mbps = convert_speed_to_mbps ( speed_in_bps ) ;
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stream < < std : : setw ( 6 ) < < speed_in_pps < < " pps " < < std : : setw ( 6 ) < < speed_in_mbps < < " mbps " ;
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if ( traffic_type = = " Incoming traffic " or traffic_type = = " Outgoing traffic " ) {
if ( packet_direction = = INCOMING ) {
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stream < < " " < < std : : setw ( 6 ) < < incoming_total_flows_speed < < " flows " ;
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} else if ( packet_direction = = OUTGOING ) {
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stream < < " " < < std : : setw ( 6 ) < < outgoing_total_flows_speed < < " flows " ;
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}
}
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return stream . str ( ) ;
}
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uint64_t convert_speed_to_mbps ( uint64_t speed_in_bps ) {
return uint64_t ( ( double ) speed_in_bps / 1024 / 1024 * 8 ) ;
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}
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void init_logging ( ) {
log4cpp : : PatternLayout * layout = new log4cpp : : PatternLayout ( ) ;
layout - > setConversionPattern ( " %d [%p] %m%n " ) ;
log4cpp : : Appender * appender = new log4cpp : : FileAppender ( " default " , log_file_path ) ;
appender - > setLayout ( layout ) ;
logger . setPriority ( log4cpp : : Priority : : INFO ) ;
logger . addAppender ( appender ) ;
logger . info ( " Logger initialized! " ) ;
}
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bool folder_exists ( std : : string path ) {
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if ( access ( path . c_str ( ) , 0 ) = = 0 ) {
struct stat status ;
stat ( path . c_str ( ) , & status ) ;
if ( status . st_mode & S_IFDIR ) {
return true ;
}
}
return false ;
}
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int main ( int argc , char * * argv ) {
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lookup_tree = New_Patricia ( 32 ) ;
whitelist_tree = New_Patricia ( 32 ) ;
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// nullify total counters
for ( int index = 0 ; index < 4 ; index + + ) {
total_counters [ index ] . bytes = 0 ;
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total_counters [ index ] . packets = 0 ;
total_speed_counters [ index ] . bytes = 0 ;
total_speed_counters [ index ] . packets = 0 ;
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}
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// enable core dumps
enable_core_dumps ( ) ;
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init_logging ( ) ;
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/* Create folder for attack details */
if ( ! folder_exists ( attack_details_folder ) ) {
int mkdir_result = mkdir ( attack_details_folder . c_str ( ) , S_IRWXU ) ;
if ( mkdir_result ! = 0 ) {
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logger < < log4cpp : : Priority : : ERROR < < " Can't create folder for attack details: " < < attack_details_folder ;
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exit ( 1 ) ;
}
}
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if ( getenv ( " DUMP_ALL_PACKETS " ) ! = NULL ) {
DEBUG_DUMP_ALL_PACKETS = true ;
}
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if ( sizeof ( packed_conntrack_hash ) ! = sizeof ( uint64_t ) or sizeof ( packed_conntrack_hash ) ! = 8 ) {
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logger < < log4cpp : : Priority : : INFO < < " Assertion about size of packed_conntrack_hash, it's " < < sizeof ( packed_conntrack_hash ) < < " instead 8 " ;
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exit ( 1 ) ;
}
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logger < < log4cpp : : Priority : : INFO < < " Read configuration file " ;
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bool load_config_result = load_configuration_file ( ) ;
if ( ! load_config_result ) {
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fprintf ( stderr , " Can't open config file %s, please create it! \n " , global_config_path . c_str ( ) ) ;
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exit ( 1 ) ;
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}
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load_our_networks_list ( ) ;
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// Setup CTRL+C handler
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signal ( SIGINT , signal_handler ) ;
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# ifdef REDIS
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// Init redis connection
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if ( redis_enabled ) {
if ( ! redis_init_connection ( ) ) {
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logger < < log4cpp : : Priority : : ERROR < < " Can't establish connection to the redis " ;
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exit ( 1 ) ;
}
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}
# endif
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# ifdef GEOIP
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// Init GeoIP
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if ( ! geoip_init ( ) ) {
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logger < < log4cpp : : Priority : : ERROR < < " Can't load geoip tables " ;
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exit ( 1 ) ;
}
# endif
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// Init previous run date
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time ( & last_call_of_traffic_recalculation ) ;
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// Run screen draw thread
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boost : : thread calc_thread ( calculation_thread ) ;
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// start thread for recalculating speed in realtime
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boost : : thread recalculate_speed_thread ( recalculate_speed_thread_handler ) ;
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// Run banlist cleaner thread
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boost : : thread cleanup_ban_list_thread ( cleanup_ban_list ) ;
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# ifdef PF_RING
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// pf_ring processing
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boost : : thread pfring_process_collector_thread ;
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if ( enable_data_collection_from_mirror ) {
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pfring_process_collector_thread = boost : : thread ( start_pfring_collection , process_packet ) ;
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}
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# endif
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// netmap processing
boost : : thread netmap_process_collector_thread ;
if ( enable_netmap_collection ) {
netmap_process_collector_thread = boost : : thread ( start_netmap_collection , process_packet ) ;
}
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boost : : thread sflow_process_collector_thread ;
if ( enable_sflow_collection ) {
sflow_process_collector_thread = boost : : thread ( start_sflow_collection , process_packet ) ;
}
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boost : : thread netflow_process_collector_thread ;
if ( enable_netflow_collection ) {
netflow_process_collector_thread = boost : : thread ( start_netflow_collection , process_packet ) ;
}
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boost : : thread pcap_process_collector_thread ;
if ( enable_pcap_collection ) {
pcap_process_collector_thread = boost : : thread ( start_pcap_collection , process_packet ) ;
}
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if ( enable_sflow_collection ) {
sflow_process_collector_thread . join ( ) ;
}
if ( enable_data_collection_from_mirror ) {
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# ifdef PF_RING
pfring_process_collector_thread . join ( ) ;
# endif
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}
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if ( enable_netmap_collection ) {
netmap_process_collector_thread . join ( ) ;
}
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recalculate_speed_thread . join ( ) ;
calc_thread . join ( ) ;
free_up_all_resources ( ) ;
return 0 ;
}
void free_up_all_resources ( ) {
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# ifdef GEOIP
// Free up geoip handle
GeoIP_delete ( geo_ip ) ;
# endif
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Destroy_Patricia ( lookup_tree , ( void_fn_t ) 0 ) ;
Destroy_Patricia ( whitelist_tree , ( void_fn_t ) 0 ) ;
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}
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// For correct programm shutdown by CTRL+C
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void signal_handler ( int signal_number ) {
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if ( enable_pcap_collection ) {
stop_pcap_collection ( ) ;
}
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# ifdef PF_RING
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stop_pfring_collection ( ) ;
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# endif
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# ifdef REDIS
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if ( redis_enabled ) {
redisFree ( redis_context ) ;
}
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# endif
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exit ( 1 ) ;
}
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/* Get traffic type: check it belongs to our IPs */
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direction get_packet_direction ( uint32_t src_ip , uint32_t dst_ip , unsigned long & subnet ) {
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direction packet_direction ;
bool our_ip_is_destination = false ;
bool our_ip_is_source = false ;
prefix_t prefix_for_check_adreess ;
prefix_for_check_adreess . family = AF_INET ;
prefix_for_check_adreess . bitlen = 32 ;
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patricia_node_t * found_patrica_node = NULL ;
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prefix_for_check_adreess . add . sin . s_addr = dst_ip ;
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unsigned long destination_subnet = 0 ;
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found_patrica_node = patricia_search_best2 ( lookup_tree , & prefix_for_check_adreess , 1 ) ;
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if ( found_patrica_node ) {
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our_ip_is_destination = true ;
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destination_subnet = found_patrica_node - > prefix - > add . sin . s_addr ;
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}
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found_patrica_node = NULL ;
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prefix_for_check_adreess . add . sin . s_addr = src_ip ;
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unsigned long source_subnet = 0 ;
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found_patrica_node = patricia_search_best2 ( lookup_tree , & prefix_for_check_adreess , 1 ) ;
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if ( found_patrica_node ) {
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our_ip_is_source = true ;
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source_subnet = found_patrica_node - > prefix - > add . sin . s_addr ;
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}
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subnet = 0 ;
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if ( our_ip_is_source & & our_ip_is_destination ) {
packet_direction = INTERNAL ;
} else if ( our_ip_is_source ) {
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subnet = source_subnet ;
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packet_direction = OUTGOING ;
} else if ( our_ip_is_destination ) {
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subnet = destination_subnet ;
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packet_direction = INCOMING ;
} else {
packet_direction = OTHER ;
}
return packet_direction ;
}
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unsigned int detect_attack_protocol ( map_element & speed_element , direction attack_direction ) {
if ( attack_direction = = INCOMING ) {
return get_max_used_protocol ( speed_element . tcp_in_packets , speed_element . udp_in_packets , speed_element . icmp_in_packets ) ;
} else {
// OUTGOING
return get_max_used_protocol ( speed_element . tcp_out_packets , speed_element . udp_out_packets , speed_element . icmp_out_packets ) ;
}
}
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# define my_max_on_defines(a, b) (a > b ? a : b)
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unsigned int get_max_used_protocol ( uint64_t tcp , uint64_t udp , uint64_t icmp ) {
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unsigned int max = my_max_on_defines ( my_max_on_defines ( udp , tcp ) , icmp ) ;
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if ( max = = tcp ) {
return IPPROTO_TCP ;
} else if ( max = = udp ) {
return IPPROTO_UDP ;
} else if ( max = = icmp ) {
return IPPROTO_ICMP ;
}
return 0 ;
}
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void execute_ip_ban ( uint32_t client_ip , map_element speed_element , map_element average_speed_element , std : : string flow_attack_details ) {
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struct attack_details current_attack ;
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uint64_t pps = 0 ;
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uint64_t in_pps = average_speed_element . in_packets ;
uint64_t out_pps = average_speed_element . out_packets ;
uint64_t in_bps = average_speed_element . in_bytes ;
uint64_t out_bps = average_speed_element . out_bytes ;
uint64_t in_flows = average_speed_element . in_flows ;
uint64_t out_flows = average_speed_element . out_flows ;
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direction data_direction ;
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if ( ! we_do_real_ban ) {
logger < < log4cpp : : Priority : : INFO < < " We do not ban: " < < convert_ip_as_uint_to_string ( client_ip ) < < " because ban disabled completely " ;
return ;
}
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// Detect attack direction with simple heuristic
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if ( abs ( int ( ( int ) in_pps - ( int ) out_pps ) ) < 1000 ) {
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// If difference between pps speed is so small we should do additional investigation using bandwidth speed
if ( in_bps > out_bps ) {
data_direction = INCOMING ;
pps = in_pps ;
} else {
data_direction = OUTGOING ;
pps = out_pps ;
}
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} else {
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if ( in_pps > out_pps ) {
data_direction = INCOMING ;
pps = in_pps ;
} else {
data_direction = OUTGOING ;
pps = out_pps ;
}
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}
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current_attack . attack_protocol = detect_attack_protocol ( speed_element , data_direction ) ;
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if ( ban_list . count ( client_ip ) > 0 ) {
if ( ban_list [ client_ip ] . attack_direction ! = data_direction ) {
logger < < log4cpp : : Priority : : INFO < < " We expected very strange situation: attack direction for "
< < convert_ip_as_uint_to_string ( client_ip ) < < " was changed " ;
return ;
}
// update attack power
if ( pps > ban_list [ client_ip ] . max_attack_power ) {
ban_list [ client_ip ] . max_attack_power = pps ;
}
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return ;
}
prefix_t prefix_for_check_adreess ;
prefix_for_check_adreess . add . sin . s_addr = client_ip ;
prefix_for_check_adreess . family = AF_INET ;
prefix_for_check_adreess . bitlen = 32 ;
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bool in_white_list = ( patricia_search_best2 ( whitelist_tree , & prefix_for_check_adreess , 1 ) ! = NULL ) ;
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if ( in_white_list ) {
return ;
}
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std : : string data_direction_as_string = get_direction_name ( data_direction ) ;
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logger . info ( " We run execute_ip_ban code with following params in_pps: %d out_pps: %d in_bps: %d out_bps: %d and we decide it's %s attack " ,
in_pps , out_pps , in_bps , out_bps , data_direction_as_string . c_str ( ) ) ;
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std : : string client_ip_as_string = convert_ip_as_uint_to_string ( client_ip ) ;
std : : string pps_as_string = convert_int_to_string ( pps ) ;
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// Store ban time
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time ( & current_attack . ban_timestamp ) ;
// set ban time in seconds
current_attack . ban_time = standard_ban_time ;
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// Pass main information about attack
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current_attack . attack_direction = data_direction ;
current_attack . attack_power = pps ;
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current_attack . max_attack_power = pps ;
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current_attack . in_packets = in_pps ;
current_attack . out_packets = out_pps ;
current_attack . in_bytes = in_bps ;
current_attack . out_bytes = out_bps ;
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// pass flow information
current_attack . in_flows = in_flows ;
current_attack . out_flows = out_flows ;
current_attack . tcp_in_packets = speed_element . tcp_in_packets ;
current_attack . udp_in_packets = speed_element . udp_in_packets ;
current_attack . icmp_in_packets = speed_element . icmp_in_packets ;
current_attack . tcp_out_packets = speed_element . tcp_out_packets ;
current_attack . udp_out_packets = speed_element . udp_out_packets ;
current_attack . icmp_out_packets = speed_element . icmp_out_packets ;
current_attack . tcp_out_bytes = speed_element . tcp_out_bytes ;
current_attack . udp_out_bytes = speed_element . udp_out_bytes ;
current_attack . icmp_out_bytes = speed_element . icmp_out_bytes ;
current_attack . tcp_in_bytes = speed_element . tcp_in_bytes ;
current_attack . udp_in_bytes = speed_element . udp_in_bytes ;
current_attack . icmp_in_bytes = speed_element . icmp_in_bytes ;
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// Add average counters
map_element * current_average_speed_element = & SpeedCounterAverage [ client_ip ] ;
current_attack . average_in_packets = current_average_speed_element - > in_packets ;
current_attack . average_in_bytes = current_average_speed_element - > in_bytes ;
current_attack . average_in_flows = current_average_speed_element - > in_flows ;
current_attack . average_out_packets = current_average_speed_element - > out_packets ;
current_attack . average_out_bytes = current_average_speed_element - > out_bytes ;
current_attack . average_out_flows = current_average_speed_element - > out_flows ;
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ban_list_mutex . lock ( ) ;
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ban_list [ client_ip ] = current_attack ;
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ban_list_mutex . unlock ( ) ;
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ban_list_details_mutex . lock ( ) ;
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ban_list_details [ client_ip ] = std : : vector < simple_packet > ( ) ;
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ban_list_details_mutex . unlock ( ) ;
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logger < < log4cpp : : Priority : : INFO < < " Attack with direction: " < < data_direction_as_string
< < " IP: " < < client_ip_as_string < < " Power: " < < pps_as_string ;
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# ifdef HWFILTER_LOCKING
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logger < < log4cpp : : Priority : : INFO < < " We will block traffic to/from this IP with hardware filters " ;
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block_all_traffic_with_82599_hardware_filtering ( client_ip_as_string ) ;
# endif
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std : : string full_attack_description = get_attack_description ( client_ip , current_attack ) + flow_attack_details ;
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print_attack_details_to_file ( full_attack_description , client_ip_as_string , current_attack ) ;
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if ( file_exists ( notify_script_path ) ) {
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std : : string script_call_params = notify_script_path + " " + client_ip_as_string + " " + data_direction_as_string + " " + pps_as_string + " attack_details " ;
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logger < < log4cpp : : Priority : : INFO < < " Call script for ban client: " < < client_ip_as_string ;
// We should execute external script in separate thread because any lag in this code will be very distructive
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boost : : thread exec_thread ( exec_with_stdin_params , script_call_params , full_attack_description ) ;
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exec_thread . detach ( ) ;
logger < < log4cpp : : Priority : : INFO < < " Script for ban client is finished: " < < client_ip_as_string ;
}
}
# ifdef HWFILTER_LOCKING
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void block_all_traffic_with_82599_hardware_filtering ( std : : string client_ip_as_string ) {
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/* 6 - tcp, 17 - udp, 0 - other (non tcp and non udp) */
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std : : vector < int > banned_protocols ;
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banned_protocols . push_back ( 17 ) ;
banned_protocols . push_back ( 6 ) ;
banned_protocols . push_back ( 0 ) ;
int rule_number = 10 ;
// Iterate over incoming and outgoing direction
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for ( int rule_direction = 0 ; rule_direction < 2 ; rule_direction + + ) {
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for ( std : : vector < int > : : iterator banned_protocol = banned_protocols . begin ( ) ;
banned_protocol ! = banned_protocols . end ( ) ; + + banned_protocol ) {
/* On 82599 NIC we can ban traffic using hardware filtering rules */
// Difference between fie tuple and perfect filters:
// http://www.ntop.org/products/pf_ring/hardware-packet-filtering/
hw_filtering_rule rule ;
intel_82599_five_tuple_filter_hw_rule * ft_rule ;
ft_rule = & rule . rule_family . five_tuple_rule ;
memset ( & rule , 0 , sizeof ( rule ) ) ;
rule . rule_family_type = intel_82599_five_tuple_rule ;
rule . rule_id = rule_number + + ;
ft_rule - > queue_id = - 1 ; // drop traffic
ft_rule - > proto = * banned_protocol ;
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std : : string hw_filter_rule_direction = " " ;
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if ( rule_direction = = 0 ) {
hw_filter_rule_direction = " outgoing " ;
ft_rule - > s_addr = ntohl ( inet_addr ( client_ip_as_string . c_str ( ) ) ) ;
} else {
hw_filter_rule_direction = " incoming " ;
ft_rule - > d_addr = ntohl ( inet_addr ( client_ip_as_string . c_str ( ) ) ) ;
}
if ( pfring_add_hw_rule ( pf_ring_descr , & rule ) ! = 0 ) {
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logger < < log4cpp : : Priority : : ERROR < < " Can't add hardware filtering rule for protocol: " < < * banned_protocol < < " in direction: " < < hw_filter_rule_direction ;
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}
rule_number + + ;
}
}
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}
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# endif
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/* Thread for cleaning up ban list */
void cleanup_ban_list ( ) {
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// Every X seconds we will run ban list cleaner thread
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int iteration_sleep_time = 600 ;
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// If we use very small ban time we should call ban_cleanup thread more often
if ( iteration_sleep_time > standard_ban_time ) {
iteration_sleep_time = int ( standard_ban_time / 2 ) ;
}
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logger < < log4cpp : : Priority : : INFO < < " Run banlist cleanup thread " ;
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while ( true ) {
// Sleep for ten minutes
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boost : : this_thread : : sleep ( boost : : posix_time : : seconds ( iteration_sleep_time ) ) ;
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time_t current_time ;
time ( & current_time ) ;
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std : : map < uint32_t , banlist_item > : : iterator itr = ban_list . begin ( ) ;
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while ( itr ! = ban_list . end ( ) ) {
uint32_t client_ip = ( * itr ) . first ;
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double time_difference = difftime ( current_time , ( ( * itr ) . second ) . ban_timestamp ) ;
int ban_time = ( ( * itr ) . second ) . ban_time ;
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if ( time_difference > ban_time ) {
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// Cleanup all data related with this attack
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std : : string data_direction_as_string = get_direction_name ( ( * itr ) . second . attack_direction ) ;
std : : string client_ip_as_string = convert_ip_as_uint_to_string ( client_ip ) ;
std : : string pps_as_string = convert_int_to_string ( ( * itr ) . second . attack_power ) ;
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logger < < log4cpp : : Priority : : INFO < < " We will unban banned IP: " < < client_ip_as_string < <
" because it ban time " < < ban_time < < " seconds is ended " ;
ban_list_mutex . lock ( ) ;
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std : : map < uint32_t , banlist_item > : : iterator itr_to_erase = itr ;
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+ + itr ;
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ban_list . erase ( itr_to_erase ) ;
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ban_list_mutex . unlock ( ) ;
if ( file_exists ( notify_script_path ) ) {
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std : : string script_call_params = notify_script_path + " " + client_ip_as_string + " " +
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data_direction_as_string + " " + pps_as_string + " unban " ;
logger < < log4cpp : : Priority : : INFO < < " Call script for unban client: " < < client_ip_as_string ;
// We should execute external script in separate thread because any lag in this code will be very distructive
boost : : thread exec_thread ( exec , script_call_params ) ;
exec_thread . detach ( ) ;
logger < < log4cpp : : Priority : : INFO < < " Script for unban client is finished: " < < client_ip_as_string ;
}
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} else {
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+ + itr ;
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}
}
}
}
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std : : string print_time_t_in_fastnetmon_format ( time_t current_time ) {
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struct tm * timeinfo ;
char buffer [ 80 ] ;
timeinfo = localtime ( & current_time ) ;
strftime ( buffer , sizeof ( buffer ) , " %d_%m_%y_%H:%M:%S " , timeinfo ) ;
return std : : string ( buffer ) ;
}
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std : : string print_ddos_attack_details ( ) {
std : : stringstream output_buffer ;
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for ( std : : map < uint32_t , banlist_item > : : iterator ii = ban_list . begin ( ) ; ii ! = ban_list . end ( ) ; + + ii ) {
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uint32_t client_ip = ( * ii ) . first ;
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std : : string client_ip_as_string = convert_ip_as_uint_to_string ( client_ip ) ;
std : : string max_pps_as_string = convert_int_to_string ( ( ( * ii ) . second ) . max_attack_power ) ;
std : : string attack_direction = get_direction_name ( ( ( * ii ) . second ) . attack_direction ) ;
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output_buffer < < client_ip_as_string < < " / " < < max_pps_as_string < < " pps " < < attack_direction < < " at " < < print_time_t_in_fastnetmon_format ( ii - > second . ban_timestamp ) < < std : : endl ;
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send_attack_details ( client_ip , ( * ii ) . second ) ;
}
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return output_buffer . str ( ) ;
}
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std : : string get_attack_description ( uint32_t client_ip , attack_details & current_attack ) {
std : : stringstream attack_description ;
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attack_description
< < " IP: " < < convert_ip_as_uint_to_string ( client_ip ) < < " \n "
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< < " Initial attack power: " < < current_attack . attack_power < < " packets per second \n "
< < " Peak attack power: " < < current_attack . max_attack_power < < " packets per second \n "
< < " Attack direction: " < < get_direction_name ( current_attack . attack_direction ) < < " \n "
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< < " Attack protocol: " < < get_printable_protocol_name ( current_attack . attack_protocol ) < < " \n "
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< < " Total incoming traffic: " < < convert_speed_to_mbps ( current_attack . in_bytes ) < < " mbps \n "
< < " Total outgoing traffic: " < < convert_speed_to_mbps ( current_attack . out_bytes ) < < " mbps \n "
< < " Total incoming pps: " < < current_attack . in_packets < < " packets per second \n "
< < " Total outgoing pps: " < < current_attack . out_packets < < " packets per second \n "
< < " Total incoming flows: " < < current_attack . in_flows < < " flows per second \n "
< < " Total outgoing flows: " < < current_attack . out_flows < < " flows per second \n " ;
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// Add average counters
attack_description
< < " Average incoming traffic: " < < convert_speed_to_mbps ( current_attack . average_in_bytes ) < < " mbps \n "
< < " Average outgoing traffic: " < < convert_speed_to_mbps ( current_attack . average_out_bytes ) < < " mbps \n "
< < " Average incoming pps: " < < current_attack . average_in_packets < < " packets per second \n "
< < " Average outgoing pps: " < < current_attack . average_out_packets < < " packets per second \n "
< < " Average incoming flows: " < < current_attack . average_in_flows < < " flows per second \n "
< < " Average outgoing flows: " < < current_attack . average_out_flows < < " flows per second \n " ;
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attack_description
< < " Incoming tcp traffic: " < < convert_speed_to_mbps ( current_attack . tcp_in_bytes ) < < " mbps \n "
< < " Outgoing tcp traffic: " < < convert_speed_to_mbps ( current_attack . tcp_out_bytes ) < < " mbps \n "
< < " Incoming tcp pps: " < < current_attack . tcp_in_packets < < " packets per second \n "
< < " Outgoing tcp pps: " < < current_attack . tcp_out_packets < < " packets per second \n "
< < " Incoming udp traffic: " < < convert_speed_to_mbps ( current_attack . udp_in_bytes ) < < " mbps \n "
< < " Outgoing udp traffic: " < < convert_speed_to_mbps ( current_attack . udp_out_bytes ) < < " mbps \n "
< < " Incoming udp pps: " < < current_attack . udp_in_packets < < " packets per second \n "
< < " Outgoing udp pps: " < < current_attack . udp_out_packets < < " packets per second \n "
< < " Incoming icmp traffic: " < < convert_speed_to_mbps ( current_attack . icmp_in_bytes ) < < " mbps \n "
< < " Outgoing icmp traffic: " < < convert_speed_to_mbps ( current_attack . icmp_out_bytes ) < < " mbps \n "
< < " Incoming icmp pps: " < < current_attack . icmp_in_packets < < " packets per second \n "
< < " Outgoing icmp pps: " < < current_attack . icmp_out_packets < < " packets per second \n " ;
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return attack_description . str ( ) ;
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}
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std : : string get_protocol_name_by_number ( unsigned int proto_number ) {
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struct protoent * proto_ent = getprotobynumber ( proto_number ) ;
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std : : string proto_name = proto_ent - > p_name ;
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return proto_name ;
}
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void send_attack_details ( uint32_t client_ip , attack_details current_attack_details ) {
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std : : string pps_as_string = convert_int_to_string ( current_attack_details . attack_power ) ;
std : : string attack_direction = get_direction_name ( current_attack_details . attack_direction ) ;
std : : string client_ip_as_string = convert_ip_as_uint_to_string ( client_ip ) ;
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// Very strange code but it work in 95% cases
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if ( ban_list_details . count ( client_ip ) > 0 & & ban_list_details [ client_ip ] . size ( ) = = ban_details_records_count ) {
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std : : stringstream attack_details ;
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attack_details < < get_attack_description ( client_ip , current_attack_details ) < < " \n \n " ;
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std : : map < unsigned int , unsigned int > protocol_counter ;
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for ( std : : vector < simple_packet > : : iterator iii = ban_list_details [ client_ip ] . begin ( ) ; iii ! = ban_list_details [ client_ip ] . end ( ) ; + + iii ) {
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attack_details < < print_simple_packet ( * iii ) ;
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protocol_counter [ iii - > protocol ] + + ;
}
std : : map < unsigned int , unsigned int > : : iterator max_proto = std : : max_element ( protocol_counter . begin ( ) , protocol_counter . end ( ) , protocol_counter . value_comp ( ) ) ;
attack_details < < " \n " < < " We got more packets ( "
< < max_proto - > second
< < " from "
< < ban_details_records_count
< < " ) for protocol: " < < get_protocol_name_by_number ( max_proto - > first ) < < " \n " ;
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logger < < log4cpp : : Priority : : INFO < < " Attack with direction: " < < attack_direction < <
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" IP: " < < client_ip_as_string < < " Power: " < < pps_as_string < < " traffic sample collected " ;
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print_attack_details_to_file ( attack_details . str ( ) , client_ip_as_string , current_attack_details ) ;
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// Pass attack details to script
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if ( file_exists ( notify_script_path ) ) {
logger < < log4cpp : : Priority : : INFO < < " Call script for notify about attack details for: " < < client_ip_as_string ;
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std : : string script_params = notify_script_path + " " + client_ip_as_string + " " + attack_direction + " " + pps_as_string + " ban " ;
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// We should execute external script in separate thread because any lag in this code will be very distructive
boost : : thread exec_with_params_thread ( exec_with_stdin_params , script_params , attack_details . str ( ) ) ;
exec_with_params_thread . detach ( ) ;
logger < < log4cpp : : Priority : : INFO < < " Script for notify about attack details is finished: " < < client_ip_as_string ;
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}
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// Remove key and prevent collection new data about this attack
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ban_list_details . erase ( client_ip ) ;
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}
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}
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std : : string convert_timeval_to_date ( struct timeval tv ) {
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time_t nowtime = tv . tv_sec ;
struct tm * nowtm = localtime ( & nowtime ) ;
char tmbuf [ 64 ] ;
char buf [ 64 ] ;
strftime ( tmbuf , sizeof ( tmbuf ) , " %Y-%m-%d %H:%M:%S " , nowtm ) ;
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snprintf ( buf , sizeof ( buf ) , " %s.%06ld " , tmbuf , tv . tv_usec ) ;
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return std : : string ( buf ) ;
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}
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// http://stackoverflow.com/questions/14528233/bit-masking-in-c-how-to-get-first-bit-of-a-byte
int extract_bit_value ( uint8_t num , int bit ) {
if ( bit > 0 & & bit < = 8 ) {
return ( ( num > > ( bit - 1 ) ) & 1 ) ;
} else {
return 0 ;
}
}
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std : : string print_tcp_flags ( uint8_t flag_value ) {
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if ( flag_value = = 0 ) {
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return " - " ;
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}
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// cod from pfring.h
// (tcp->fin * TH_FIN_MULTIPLIER) + (tcp->syn * TH_SYN_MULTIPLIER) +
// (tcp->rst * TH_RST_MULTIPLIER) + (tcp->psh * TH_PUSH_MULTIPLIER) +
// (tcp->ack * TH_ACK_MULTIPLIER) + (tcp->urg * TH_URG_MULTIPLIER);
/*
// Required for decoding tcp flags
# define TH_FIN_MULTIPLIER 0x01
# define TH_SYN_MULTIPLIER 0x02
# define TH_RST_MULTIPLIER 0x04
# define TH_PUSH_MULTIPLIER 0x08
# define TH_ACK_MULTIPLIER 0x10
# define TH_URG_MULTIPLIER 0x20
*/
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std : : vector < std : : string > all_flags ;
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if ( extract_bit_value ( flag_value , 1 ) ) {
all_flags . push_back ( " fin " ) ;
}
if ( extract_bit_value ( flag_value , 2 ) ) {
all_flags . push_back ( " syn " ) ;
}
if ( extract_bit_value ( flag_value , 3 ) ) {
all_flags . push_back ( " rst " ) ;
}
if ( extract_bit_value ( flag_value , 4 ) ) {
all_flags . push_back ( " psh " ) ;
}
if ( extract_bit_value ( flag_value , 5 ) ) {
all_flags . push_back ( " ack " ) ;
}
if ( extract_bit_value ( flag_value , 6 ) ) {
all_flags . push_back ( " urg " ) ;
}
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std : : ostringstream flags_as_string ;
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if ( all_flags . empty ( ) ) {
return " - " ;
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}
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// concatenate all vector elements with comma
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std : : copy ( all_flags . begin ( ) , all_flags . end ( ) - 1 , std : : ostream_iterator < std : : string > ( flags_as_string , " , " ) ) ;
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// add last element
flags_as_string < < all_flags . back ( ) ;
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return flags_as_string . str ( ) ;
}
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# define BIG_CONSTANT(x) (x##LLU)
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/*
// calculate hash
unsigned int seed = 11 ;
uint64_t hash = MurmurHash64A ( & current_packet , sizeof ( current_packet ) , seed ) ;
*/
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// https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash2.cpp
// 64-bit hash for 64-bit platforms
uint64_t MurmurHash64A ( const void * key , int len , uint64_t seed ) {
const uint64_t m = BIG_CONSTANT ( 0xc6a4a7935bd1e995 ) ;
const int r = 47 ;
uint64_t h = seed ^ ( len * m ) ;
const uint64_t * data = ( const uint64_t * ) key ;
const uint64_t * end = data + ( len / 8 ) ;
while ( data ! = end ) {
uint64_t k = * data + + ;
k * = m ;
k ^ = k > > r ;
k * = m ;
h ^ = k ;
h * = m ;
}
const unsigned char * data2 = ( const unsigned char * ) data ;
switch ( len & 7 ) {
case 7 : h ^ = uint64_t ( data2 [ 6 ] ) < < 48 ;
case 6 : h ^ = uint64_t ( data2 [ 5 ] ) < < 40 ;
case 5 : h ^ = uint64_t ( data2 [ 4 ] ) < < 32 ;
case 4 : h ^ = uint64_t ( data2 [ 3 ] ) < < 24 ;
case 3 : h ^ = uint64_t ( data2 [ 2 ] ) < < 16 ;
case 2 : h ^ = uint64_t ( data2 [ 1 ] ) < < 8 ;
case 1 : h ^ = uint64_t ( data2 [ 0 ] ) ;
h * = m ;
} ;
h ^ = h > > r ;
h * = m ;
h ^ = h > > r ;
return h ;
}
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bool is_cidr_subnet ( const char * subnet ) {
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boost : : cmatch what ;
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if ( regex_match ( subnet , what , regular_expression_cidr_pattern ) ) {
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return true ;
} else {
return false ;
}
}
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// http://www.gnu.org/software/libc/manual/html_node/Elapsed-Time.html
int timeval_subtract ( struct timeval * result , struct timeval * x , struct timeval * y ) {
/* Perform the carry for the later subtraction by updating y. */
if ( x - > tv_usec < y - > tv_usec ) {
int nsec = ( y - > tv_usec - x - > tv_usec ) / 1000000 + 1 ;
y - > tv_usec - = 1000000 * nsec ;
y - > tv_sec + = nsec ;
}
if ( x - > tv_usec - y - > tv_usec > 1000000 ) {
int nsec = ( x - > tv_usec - y - > tv_usec ) / 1000000 ;
y - > tv_usec + = 1000000 * nsec ;
y - > tv_sec - = nsec ;
}
/* Compute the time remaining to wait. tv_usec is certainly positive. */
result - > tv_sec = x - > tv_sec - y - > tv_sec ;
result - > tv_usec = x - > tv_usec - y - > tv_usec ;
/* Return 1 if result is negative. */
return x - > tv_sec < y - > tv_sec ;
}
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uint64_t convert_conntrack_hash_struct_to_integer ( packed_conntrack_hash * struct_value ) {
uint64_t unpacked_data = 0 ;
memcpy ( & unpacked_data , struct_value , sizeof ( uint64_t ) ) ;
return unpacked_data ;
}
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void convert_integer_to_conntrack_hash_struct ( packed_session * packed_connection_data , packed_conntrack_hash * unpacked_data ) {
memcpy ( unpacked_data , packed_connection_data , sizeof ( uint64_t ) ) ;
}
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std : : string print_flow_tracking_for_specified_protocol ( contrack_map_type & protocol_map , std : : string client_ip , direction flow_direction ) {
std : : stringstream buffer ;
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// We shoud iterate over all fields
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int printed_records = 0 ;
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for ( contrack_map_type : : iterator itr = protocol_map . begin ( ) ; itr ! = protocol_map . end ( ) ; + + itr ) {
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// We should limit number of records in flow dump because syn flood attacks produce thounsands of lines
if ( printed_records > ban_details_records_count ) {
buffer < < " Flows are cropped due very long list \n " ;
break ;
}
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uint64_t packed_connection_data = itr - > first ;
packed_conntrack_hash unpacked_key_struct ;
convert_integer_to_conntrack_hash_struct ( & packed_connection_data , & unpacked_key_struct ) ;
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std : : string opposite_ip_as_string = convert_ip_as_uint_to_string ( unpacked_key_struct . opposite_ip ) ;
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if ( flow_direction = = INCOMING ) {
buffer < < client_ip < < " : " < < unpacked_key_struct . dst_port < < " < " < < opposite_ip_as_string < < " : " < < unpacked_key_struct . src_port < < " " ;
} else if ( flow_direction = = OUTGOING ) {
buffer < < client_ip < < " : " < < unpacked_key_struct . src_port < < " > " < < opposite_ip_as_string < < " : " < < unpacked_key_struct . dst_port < < " " ;
}
buffer < < itr - > second . bytes < < " bytes " < < itr - > second . packets < < " packets " ;
buffer < < " \n " ;
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printed_records + + ;
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}
return buffer . str ( ) ;
}
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/*
Attack types :
- syn flood : one local port , multiple remote hosts ( and maybe multiple remote ports ) and small packet size
*/
/* Iterate over all flow tracking table */
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bool process_flow_tracking_table ( conntrack_main_struct & conntrack_element , std : : string client_ip ) {
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std : : map < uint32_t , unsigned int > uniq_remote_hosts_which_generate_requests_to_us ;
std : : map < unsigned int , unsigned int > uniq_local_ports_which_target_of_connectiuons_from_inside ;
/* Process incoming TCP connections */
for ( contrack_map_type : : iterator itr = conntrack_element . in_tcp . begin ( ) ; itr ! = conntrack_element . in_tcp . end ( ) ; + + itr ) {
uint64_t packed_connection_data = itr - > first ;
packed_conntrack_hash unpacked_key_struct ;
convert_integer_to_conntrack_hash_struct ( & packed_connection_data , & unpacked_key_struct ) ;
uniq_remote_hosts_which_generate_requests_to_us [ unpacked_key_struct . opposite_ip ] + + ;
uniq_local_ports_which_target_of_connectiuons_from_inside [ unpacked_key_struct . dst_port ] + + ;
// we can calc average packet size
// string opposite_ip_as_string = convert_ip_as_uint_to_string(unpacked_key_struct.opposite_ip);
// unpacked_key_struct.src_port
// unpacked_key_struct.dst_port
// itr->second.packets
// itr->second.bytes
}
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return true ;
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}
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std : : string print_flow_tracking_for_ip ( conntrack_main_struct & conntrack_element , std : : string client_ip ) {
std : : stringstream buffer ;
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std : : string in_tcp = print_flow_tracking_for_specified_protocol ( conntrack_element . in_tcp , client_ip , INCOMING ) ;
std : : string in_udp = print_flow_tracking_for_specified_protocol ( conntrack_element . in_udp , client_ip , INCOMING ) ;
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bool we_have_incoming_flows = in_tcp . length ( ) > 0 or in_udp . length ( ) > 0 ;
if ( we_have_incoming_flows ) {
buffer < < " Incoming \n \n " ;
if ( in_tcp . length ( ) > 0 ) {
buffer < < " TCP \n " < < in_tcp < < " \n " ;
}
if ( in_udp . length ( ) > 0 ) {
buffer < < " UDP \n " < < in_udp < < " \n " ;
}
}
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std : : string out_tcp = print_flow_tracking_for_specified_protocol ( conntrack_element . out_tcp , client_ip , OUTGOING ) ;
std : : string out_udp = print_flow_tracking_for_specified_protocol ( conntrack_element . out_udp , client_ip , OUTGOING ) ;
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bool we_have_outgoing_flows = out_tcp . length ( ) > 0 or out_udp . length ( ) > 0 ;
// print delimiter if we have flows in both directions
if ( we_have_incoming_flows & & we_have_outgoing_flows ) {
buffer < < " \n " ;
}
if ( we_have_outgoing_flows ) {
buffer < < " Outgoing \n \n " ;
if ( out_tcp . length ( ) > 0 ) {
buffer < < " TCP \n " < < out_tcp < < " \n " ;
}
if ( out_udp . length ( ) > 0 ) {
buffer < < " UDP \n " < < out_udp < < " \n " ;
}
}
return buffer . str ( ) ;
}
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std : : string print_ban_thresholds ( ) {
std : : stringstream output_buffer ;
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output_buffer < < " Configuration params: \n " ;
if ( we_do_real_ban ) {
output_buffer < < " We call ban script: yes \n " ;
} else {
output_buffer < < " We call ban script: no \n " ;
}
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output_buffer < < " Packets per second: " ;
if ( enable_ban_for_pps ) {
output_buffer < < ban_threshold_pps ;
} else {
output_buffer < < " disabled " ;
}
output_buffer < < " \n " ;
output_buffer < < " Mbps per second: " ;
if ( enable_ban_for_bandwidth ) {
output_buffer < < ban_threshold_mbps ;
} else {
output_buffer < < " disabled " ;
}
output_buffer < < " \n " ;
output_buffer < < " Flows per second: " ;
if ( enable_ban_for_flows_per_second ) {
output_buffer < < ban_threshold_flows ;
} else {
output_buffer < < " disabled " ;
}
output_buffer < < " \n " ;
return output_buffer . str ( ) ;
}
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void print_attack_details_to_file ( std : : string details , std : : string client_ip_as_string , attack_details current_attack ) {
std : : ofstream my_attack_details_file ;
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std : : string ban_timestamp_as_string = print_time_t_in_fastnetmon_format ( current_attack . ban_timestamp ) ;
std : : string attack_dump_path = attack_details_folder + " / " + client_ip_as_string + " _ " + ban_timestamp_as_string ;
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my_attack_details_file . open ( attack_dump_path . c_str ( ) , std : : ios : : app ) ;
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if ( my_attack_details_file . is_open ( ) ) {
my_attack_details_file < < details < < " \n \n " ;
my_attack_details_file . close ( ) ;
} else {
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logger < < log4cpp : : Priority : : ERROR < < " Can't print attack details to file " ;
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}
}
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// Return true when we should ban this IP
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bool we_should_ban_this_ip ( map_element * average_speed_element ) {
uint64_t in_pps_average = average_speed_element - > in_packets ;
uint64_t out_pps_average = average_speed_element - > out_packets ;
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uint64_t in_bps_average = average_speed_element - > in_bytes ;
uint64_t out_bps_average = average_speed_element - > out_bytes ;
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uint64_t in_flows_average = average_speed_element - > in_flows ;
uint64_t out_flows_average = average_speed_element - > out_flows ;
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// we detect overspeed by packets
bool attack_detected_by_pps = false ;
bool attack_detected_by_bandwidth = false ;
bool attack_detected_by_flow = false ;
if ( enable_ban_for_pps & & ( in_pps_average > ban_threshold_pps or out_pps_average > ban_threshold_pps ) ) {
attack_detected_by_pps = true ;
}
// we detect overspeed by bandwidth
if ( enable_ban_for_bandwidth & & ( convert_speed_to_mbps ( in_bps_average ) > ban_threshold_mbps or convert_speed_to_mbps ( out_bps_average ) > ban_threshold_mbps ) ) {
attack_detected_by_bandwidth = true ;
}
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if ( enable_ban_for_flows_per_second & & ( in_flows_average > ban_threshold_flows or out_flows_average > ban_threshold_flows ) ) {
attack_detected_by_flow = true ;
}
return attack_detected_by_pps or attack_detected_by_bandwidth or attack_detected_by_flow ;
}