mirror of
https://github.com/optim-enterprises-bv/nDPId.git
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33560d64d2
* CI: build against libnDPI with `-DNDPI_NO_PKGCONFIG=ON` and `-DSTATIC_LIBNDPI_INSTALLDIR=/usr` * CI: `ENABLE_DBUS=ON` for most builds Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
669 lines
25 KiB
C
669 lines
25 KiB
C
#include <dbus-1.0/dbus/dbus.h>
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#include <signal.h>
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#include <stdint.h>
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#include <syslog.h>
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#include "nDPIsrvd.h"
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#include "utstring.h"
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#include "utils.h"
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#define SLEEP_TIME_IN_S (3)
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struct flow_user_data
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{
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nDPIsrvd_ull detected_risks;
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};
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enum dbus_level
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{
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DBUS_LOW = 0,
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DBUS_NORMAL,
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DBUS_CRITICAL
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};
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static char const * const flow_severities[] = {"Low", "Medium", "High", "Severe", "Critical", "Emergency"};
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static char const * const flow_breeds[] = {
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"Safe", "Acceptable", "Fun", "Unsafe", "Potentially Dangerous", "Tracker\\/Ads", "Dangerous", "Unrated", "???"};
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static char const * const flow_categories[] = {"Unspecified",
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"Media",
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"VPN",
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"Email",
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"DataTransfer",
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"Web",
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"SocialNetwork",
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"Download",
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"Game",
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"Chat",
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"VoIP",
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"Database",
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"RemoteAccess",
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"Cloud",
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"Network",
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"Collaborative",
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"RPC",
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"Streaming",
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"System",
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"SoftwareUpdate",
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"Music",
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"Video",
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"Shopping",
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"Productivity",
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"FileSharing",
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"ConnCheck",
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"IoT-Scada",
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"VirtAssistant",
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"Cybersecurity",
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"AdultContent",
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"Mining",
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"Malware",
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"Advertisement",
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"Banned_Site",
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"Site_Unavailable",
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"Allowed_Site",
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"Antimalware",
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"Crypto_Currency"};
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static uint8_t desired_flow_severities[nDPIsrvd_ARRAY_LENGTH(flow_severities)] = {};
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static uint8_t desired_flow_breeds[nDPIsrvd_ARRAY_LENGTH(flow_breeds)] = {};
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static uint8_t desired_flow_categories[nDPIsrvd_ARRAY_LENGTH(flow_categories)] = {};
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static unsigned int id = 0;
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static char const * const application = "nDPIsrvd.notifyd";
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static int main_thread_shutdown = 0;
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static char * pidfile = NULL;
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static char * serv_optarg = NULL;
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#ifdef ENABLE_MEMORY_PROFILING
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void nDPIsrvd_memprof_log_alloc(size_t alloc_size)
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{
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(void)alloc_size;
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}
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void nDPIsrvd_memprof_log_free(size_t free_size)
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{
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(void)free_size;
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}
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void nDPIsrvd_memprof_log(char const * const format, ...)
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{
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va_list ap;
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va_start(ap, format);
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fprintf(stderr, "%s", "nDPIsrvd MemoryProfiler: ");
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vfprintf(stderr, format, ap);
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fprintf(stderr, "%s\n", "");
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va_end(ap);
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}
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#endif
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static void send_to_dbus(char const * const icon,
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char const * const urgency,
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enum dbus_level level,
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char const * const summary,
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char const * const body,
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int timeout)
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{
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DBusConnection * connection = dbus_bus_get(DBUS_BUS_SESSION, 0);
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DBusMessage * message = dbus_message_new_method_call("org.freedesktop.Notifications",
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"/org/freedesktop/Notifications",
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"org.freedesktop.Notifications",
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"Notify");
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DBusMessageIter iter[4];
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dbus_message_iter_init_append(message, iter);
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dbus_message_iter_append_basic(iter, 's', &application);
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dbus_message_iter_append_basic(iter, 'u', &id);
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dbus_message_iter_append_basic(iter, 's', &icon);
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dbus_message_iter_append_basic(iter, 's', &summary);
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dbus_message_iter_append_basic(iter, 's', &body);
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dbus_message_iter_open_container(iter, 'a', "s", iter + 1);
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dbus_message_iter_close_container(iter, iter + 1);
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dbus_message_iter_open_container(iter, 'a', "{sv}", iter + 1);
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dbus_message_iter_open_container(iter + 1, 'e', 0, iter + 2);
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dbus_message_iter_append_basic(iter + 2, 's', &urgency);
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dbus_message_iter_open_container(iter + 2, 'v', "y", iter + 3);
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dbus_message_iter_append_basic(iter + 3, 'y', &level);
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dbus_message_iter_close_container(iter + 2, iter + 3);
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dbus_message_iter_close_container(iter + 1, iter + 2);
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dbus_message_iter_close_container(iter, iter + 1);
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dbus_message_iter_append_basic(iter, 'i', &timeout);
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dbus_connection_send(connection, message, 0);
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dbus_connection_flush(connection);
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dbus_message_unref(message);
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dbus_connection_unref(connection);
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id++;
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}
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static void notify(enum dbus_level level, char const * const summary, int timeout, char const * const body)
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{
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send_to_dbus("dialog-information", "urgency", level, summary, body, timeout);
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}
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__attribute__((format(printf, 4, 5))) static void notifyf(
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enum dbus_level level, char const * const summary, int timeout, char const * const body_fmt, ...)
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{
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va_list ap;
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char buf[BUFSIZ];
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va_start(ap, body_fmt);
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if (vsnprintf(buf, sizeof(buf), body_fmt, ap) > 0)
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{
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notify(level, summary, timeout, buf);
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}
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va_end(ap);
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}
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static ssize_t get_value_index(char const * const possible_values[],
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size_t possible_values_size,
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char const * const needle,
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size_t needle_len)
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{
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size_t i;
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for (i = 0; i < possible_values_size; ++i)
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{
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if (strncmp(needle, possible_values[i], needle_len) == 0)
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{
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break;
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}
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}
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if (i == possible_values_size)
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{
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return -1;
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}
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return i;
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}
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static void check_value(char const * const possible_values[],
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size_t possible_values_size,
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char const * const needle,
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size_t needle_len)
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{
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if (get_value_index(possible_values, possible_values_size, needle, needle_len) == -1)
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{
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syslog(LOG_DAEMON | LOG_ERR, "BUG: Unknown value: %.*s", (int)needle_len, needle);
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notifyf(DBUS_CRITICAL, "BUG", 5000, "Unknown value: %.*s", (int)needle_len, needle);
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}
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}
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static enum nDPIsrvd_callback_return notifyd_json_callback(struct nDPIsrvd_socket * const sock,
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struct nDPIsrvd_instance * const instance,
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struct nDPIsrvd_thread_data * const thread_data,
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struct nDPIsrvd_flow * const flow)
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{
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(void)instance;
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(void)thread_data;
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struct nDPIsrvd_json_token const * const flow_event_name = TOKEN_GET_SZ(sock, "flow_event_name");
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struct flow_user_data * flow_user_data = NULL;
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if (flow != NULL)
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{
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flow_user_data = (struct flow_user_data *)flow->flow_user_data;
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}
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if (TOKEN_VALUE_EQUALS_SZ(sock, flow_event_name, "detected") != 0 ||
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TOKEN_VALUE_EQUALS_SZ(sock, flow_event_name, "detection-update") != 0 ||
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TOKEN_VALUE_EQUALS_SZ(sock, flow_event_name, "update") != 0)
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{
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struct nDPIsrvd_json_token const * const flow_risks = TOKEN_GET_SZ(sock, "ndpi", "flow_risk");
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struct nDPIsrvd_json_token const * current = NULL;
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int next_child_index = -1, desired_severity_found = 0;
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UT_string risks;
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utstring_init(&risks);
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if (flow_risks != NULL)
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{
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while ((current = nDPIsrvd_get_next_token(sock, flow_risks, &next_child_index)) != NULL)
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{
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nDPIsrvd_ull numeric_risk_value = (nDPIsrvd_ull)-1;
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size_t flow_risk_key_len = 0;
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char const * const flow_risk_key = TOKEN_GET_KEY(sock, current, &flow_risk_key_len);
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if (flow_risk_key == NULL || flow_risk_key_len == 0)
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{
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continue;
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}
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if (str_value_to_ull(flow_risk_key, &numeric_risk_value) == CONVERSION_OK && flow_user_data != NULL &&
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(flow_user_data->detected_risks & (1ull << numeric_risk_value)) == 0)
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{
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flow_user_data->detected_risks |= (1ull << (numeric_risk_value - 1));
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char flow_risk_sz[flow_risk_key_len + 1];
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snprintf(flow_risk_sz, sizeof(flow_risk_sz), "%llu", numeric_risk_value);
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size_t flow_risk_len = 0;
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size_t flow_severity_len = 0;
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char const * const flow_risk_str =
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TOKEN_GET_VALUE(sock,
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TOKEN_GET_SZ(sock, "ndpi", "flow_risk", flow_risk_sz, "risk"),
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&flow_risk_len);
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char const * const flow_severity_str =
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TOKEN_GET_VALUE(sock,
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TOKEN_GET_SZ(sock, "ndpi", "flow_risk", flow_risk_sz, "severity"),
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&flow_severity_len);
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if (flow_risk_str == NULL || flow_risk_len == 0 || flow_severity_str == NULL ||
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flow_severity_len == 0)
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{
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continue;
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}
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ssize_t severity_index = get_value_index(flow_severities,
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nDPIsrvd_ARRAY_LENGTH(flow_severities),
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flow_severity_str,
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flow_severity_len);
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if (severity_index != -1 && desired_flow_severities[severity_index] != 0)
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{
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desired_severity_found = 1;
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}
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utstring_printf(&risks,
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"Risk: '%.*s'\n"
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"Severity: '%.*s'\n",
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(int)flow_risk_len,
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flow_risk_str,
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(int)flow_severity_len,
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flow_severity_str);
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check_value(flow_severities,
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nDPIsrvd_ARRAY_LENGTH(flow_severities),
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flow_severity_str,
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flow_severity_len);
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}
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}
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}
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{
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size_t flow_srcip_len = 0;
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size_t flow_dstip_len = 0;
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size_t flow_breed_len = 0;
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size_t flow_category_len = 0;
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size_t flow_hostname_len = 0;
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char const * const flow_srcip = TOKEN_GET_VALUE(sock, TOKEN_GET_SZ(sock, "src_ip"), &flow_srcip_len);
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char const * const flow_dstip = TOKEN_GET_VALUE(sock, TOKEN_GET_SZ(sock, "dst_ip"), &flow_dstip_len);
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char const * const flow_breed_str =
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TOKEN_GET_VALUE(sock, TOKEN_GET_SZ(sock, "ndpi", "breed"), &flow_breed_len);
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char const * const flow_category_str =
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TOKEN_GET_VALUE(sock, TOKEN_GET_SZ(sock, "ndpi", "category"), &flow_category_len);
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char const * const flow_hostname =
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TOKEN_GET_VALUE(sock, TOKEN_GET_SZ(sock, "ndpi", "hostname"), &flow_hostname_len);
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if (flow_breed_str != NULL && flow_breed_len != 0 && flow_category_str != NULL && flow_category_len != 0)
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{
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ssize_t breed_index =
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get_value_index(flow_breeds, nDPIsrvd_ARRAY_LENGTH(flow_breeds), flow_breed_str, flow_breed_len);
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ssize_t category_index = get_value_index(flow_categories,
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nDPIsrvd_ARRAY_LENGTH(flow_categories),
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flow_category_str,
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flow_category_len);
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if ((breed_index != -1 && desired_flow_breeds[breed_index] != 0) ||
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(category_index != -1 && desired_flow_categories[category_index] != 0) ||
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desired_severity_found != 0)
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{
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notifyf(DBUS_CRITICAL,
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"Flow Notification",
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5000,
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"%.*s -> %.*s (%.*s)\nBreed: '%.*s', Category: '%.*s'\n%s",
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(int)flow_srcip_len,
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flow_srcip,
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(int)flow_dstip_len,
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flow_dstip,
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(flow_hostname_len > 0 ? (int)flow_hostname_len : 1),
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(flow_hostname_len > 0 ? flow_hostname : "-"),
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(int)flow_breed_len,
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flow_breed_str,
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(int)flow_category_len,
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flow_category_str,
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(utstring_len(&risks) > 0 ? utstring_body(&risks) : "No flow risks detected\n"));
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}
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check_value(flow_breeds, nDPIsrvd_ARRAY_LENGTH(flow_breeds), flow_breed_str, flow_breed_len);
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check_value(flow_categories,
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nDPIsrvd_ARRAY_LENGTH(flow_categories),
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flow_category_str,
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flow_category_len);
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}
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else if (desired_severity_found != 0)
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{
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notifyf(DBUS_CRITICAL,
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"Risky Flow",
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5000,
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"%.*s -> %.*s (%.*s)\n%s",
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(int)flow_srcip_len,
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flow_srcip,
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(int)flow_dstip_len,
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flow_dstip,
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(flow_hostname_len > 0 ? (int)flow_hostname_len : 1),
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(flow_hostname_len > 0 ? flow_hostname : "-"),
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utstring_body(&risks));
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}
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}
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utstring_done(&risks);
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}
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return CALLBACK_OK;
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}
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static void print_usage(char const * const arg0)
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{
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static char const usage[] =
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"Usage: %s "
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"[-s host] [-C category...] [-B breed...] [-S severity...]\n\n"
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"\t-s\tDestination where nDPIsrvd is listening on.\n"
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"\t-C\tDesired nDPI category which fires a notificiation.\n"
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"\t \tCan be specified multiple times.\n"
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"\t-B\tDesired nDPI breed which fires a notification.\n"
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"\t \tCan be specified multiple times.\n"
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"\t-S\tDesired nDPI risk severity which fires a notification.\n"
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"\t \tCan be specified multiple times.\n"
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"\n"
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"Possible values for `-C': %s\n"
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"Possible values for `-B': %s\n"
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"Possible values for `-S': %s\n"
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"\n";
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UT_string flow_categories_str, flow_breeds_str, flow_severities_str;
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utstring_init(&flow_categories_str);
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utstring_init(&flow_breeds_str);
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utstring_init(&flow_severities_str);
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for (size_t i = 0; i < nDPIsrvd_ARRAY_LENGTH(flow_categories); ++i)
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{
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utstring_printf(&flow_categories_str, "%s, ", flow_categories[i]);
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}
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flow_categories_str.d[flow_categories_str.i - 2] = '\0';
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for (size_t i = 0; i < nDPIsrvd_ARRAY_LENGTH(flow_breeds); ++i)
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{
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utstring_printf(&flow_breeds_str, "%s, ", flow_breeds[i]);
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}
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flow_breeds_str.d[flow_breeds_str.i - 2] = '\0';
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for (size_t i = 0; i < nDPIsrvd_ARRAY_LENGTH(flow_severities); ++i)
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{
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utstring_printf(&flow_severities_str, "%s, ", flow_severities[i]);
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}
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flow_severities_str.d[flow_severities_str.i - 2] = '\0';
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fprintf(stderr,
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usage,
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arg0,
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utstring_body(&flow_categories_str),
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utstring_body(&flow_breeds_str),
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utstring_body(&flow_severities_str));
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utstring_done(&flow_severities_str);
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utstring_done(&flow_breeds_str);
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utstring_done(&flow_categories_str);
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}
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static int set_defaults(void)
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{
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char const * const default_severities[] = {"High", "Severe", "Critical", "Emergency"};
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char const * const default_breeds[] = {"Unsafe", "Potentially Dangerous", "Dangerous", "Unrated"};
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char const * const default_categories[] = {"Mining", "Malware", "Banned_Site", "Crypto_Currency"};
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for (size_t i = 0; i < nDPIsrvd_ARRAY_LENGTH(default_severities); ++i)
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{
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ssize_t index = get_value_index(flow_severities,
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nDPIsrvd_ARRAY_LENGTH(flow_severities),
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default_severities[i],
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strlen(default_severities[i]));
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if (index == -1)
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{
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return 1;
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}
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desired_flow_severities[index] = 1;
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}
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for (size_t i = 0; i < nDPIsrvd_ARRAY_LENGTH(default_breeds); ++i)
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{
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ssize_t index = get_value_index(flow_breeds,
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nDPIsrvd_ARRAY_LENGTH(flow_breeds),
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default_breeds[i],
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strlen(default_breeds[i]));
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if (index == -1)
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{
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return 1;
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}
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desired_flow_breeds[index] = 1;
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}
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for (size_t i = 0; i < nDPIsrvd_ARRAY_LENGTH(default_categories); ++i)
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{
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ssize_t index = get_value_index(flow_categories,
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nDPIsrvd_ARRAY_LENGTH(flow_categories),
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default_categories[i],
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strlen(default_categories[i]));
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if (index == -1)
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{
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return 1;
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}
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desired_flow_categories[index] = 1;
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}
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return 0;
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}
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static int parse_options(int argc, char ** argv, struct nDPIsrvd_socket * const sock)
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{
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int opt, force_defaults = 1;
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while ((opt = getopt(argc, argv, "hdp:s:C:B:S:")) != -1)
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{
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switch (opt)
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{
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case 'd':
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daemonize_enable();
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break;
|
|
case 'p':
|
|
free(pidfile);
|
|
pidfile = strdup(optarg);
|
|
break;
|
|
case 's':
|
|
free(serv_optarg);
|
|
serv_optarg = strdup(optarg);
|
|
break;
|
|
case 'C':
|
|
{
|
|
ssize_t index =
|
|
get_value_index(flow_categories, nDPIsrvd_ARRAY_LENGTH(flow_categories), optarg, strlen(optarg));
|
|
if (index == -1)
|
|
{
|
|
fprintf(stderr, "Invalid argument for `-C': %s\n", optarg);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
desired_flow_categories[index] = 1;
|
|
}
|
|
force_defaults = 0;
|
|
break;
|
|
}
|
|
case 'B':
|
|
{
|
|
ssize_t index =
|
|
get_value_index(flow_breeds, nDPIsrvd_ARRAY_LENGTH(flow_breeds), optarg, strlen(optarg));
|
|
if (index == -1)
|
|
{
|
|
fprintf(stderr, "Invalid argument for `-B': %s\n", optarg);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
desired_flow_breeds[index] = 1;
|
|
}
|
|
force_defaults = 0;
|
|
break;
|
|
}
|
|
case 'S':
|
|
{
|
|
ssize_t index =
|
|
get_value_index(flow_severities, nDPIsrvd_ARRAY_LENGTH(flow_severities), optarg, strlen(optarg));
|
|
if (index == -1)
|
|
{
|
|
fprintf(stderr, "Invalid argument for `-S': %s\n", optarg);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
desired_flow_severities[index] = 1;
|
|
}
|
|
force_defaults = 0;
|
|
break;
|
|
}
|
|
default:
|
|
print_usage(argv[0]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (force_defaults != 0 && set_defaults() != 0)
|
|
{
|
|
fprintf(stderr, "%s\n", "BUG: Could not set default values.");
|
|
syslog(LOG_DAEMON | LOG_ERR, "%s\n", "BUG: Could not set default values.");
|
|
return 1;
|
|
}
|
|
|
|
if (serv_optarg == NULL)
|
|
{
|
|
serv_optarg = strdup(DISTRIBUTOR_UNIX_SOCKET);
|
|
}
|
|
|
|
if (nDPIsrvd_setup_address(&sock->address, serv_optarg) != 0)
|
|
{
|
|
syslog(LOG_DAEMON | LOG_ERR, "Could not parse address `%s'", serv_optarg);
|
|
return 1;
|
|
}
|
|
|
|
if (optind < argc)
|
|
{
|
|
syslog(LOG_DAEMON | LOG_ERR, "%s", "Unexpected argument after options");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sighandler(int signum)
|
|
{
|
|
switch (signum)
|
|
{
|
|
case SIGINT:
|
|
notify(DBUS_LOW, "nDPIsrvd-notifyd", 3000, "Received SIGINT, shutdown.");
|
|
break;
|
|
case SIGTERM:
|
|
notify(DBUS_LOW, "nDPIsrvd-notifyd", 3000, "Received SIGTERM, shutdown.");
|
|
break;
|
|
default:
|
|
notify(DBUS_LOW, "nDPIsrvd-notifyd", 3000, "Received unknown signal, shutdown.");
|
|
break;
|
|
}
|
|
|
|
main_thread_shutdown++;
|
|
}
|
|
|
|
int main(int argc, char ** argv)
|
|
{
|
|
signal(SIGINT, sighandler);
|
|
signal(SIGTERM, sighandler);
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
openlog("nDPIsrvd-notifyd", LOG_CONS, LOG_DAEMON);
|
|
|
|
struct nDPIsrvd_socket * sock =
|
|
nDPIsrvd_socket_init(0, 0, 0, sizeof(struct flow_user_data), notifyd_json_callback, NULL, NULL);
|
|
if (sock == NULL)
|
|
{
|
|
syslog(LOG_DAEMON | LOG_ERR, "%s", "nDPIsrvd socket memory allocation failed!");
|
|
return 1;
|
|
}
|
|
|
|
if (parse_options(argc, argv, sock) != 0)
|
|
{
|
|
goto failure;
|
|
}
|
|
|
|
if (daemonize_with_pidfile(pidfile) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int previous_connect_succeeded = 1;
|
|
do
|
|
{
|
|
if (nDPIsrvd_connect(sock) != CONNECT_OK)
|
|
{
|
|
if (main_thread_shutdown != 0)
|
|
{
|
|
break;
|
|
}
|
|
if (previous_connect_succeeded != 0)
|
|
{
|
|
notifyf(DBUS_CRITICAL, "nDPIsrvd-notifyd", 3000, "nDPIsrvd socket connect to %s failed!", serv_optarg);
|
|
syslog(LOG_DAEMON | LOG_ERR, "nDPIsrvd socket connect to %s failed!", serv_optarg);
|
|
previous_connect_succeeded = 0;
|
|
}
|
|
nDPIsrvd_socket_close(sock);
|
|
sleep(SLEEP_TIME_IN_S);
|
|
continue;
|
|
}
|
|
previous_connect_succeeded = 1;
|
|
|
|
if (nDPIsrvd_set_read_timeout(sock, 3, 0) != 0)
|
|
{
|
|
syslog(LOG_DAEMON | LOG_ERR, "nDPIsrvd set read timeout failed: %s", strerror(errno));
|
|
goto failure;
|
|
}
|
|
|
|
notifyf(DBUS_NORMAL, "nDPIsrvd-notifyd", 3000, "Connected to '%s'", serv_optarg);
|
|
syslog(LOG_DAEMON | LOG_NOTICE, "%s", "Initialization succeeded.");
|
|
|
|
while (main_thread_shutdown == 0)
|
|
{
|
|
enum nDPIsrvd_read_return read_ret = nDPIsrvd_read(sock);
|
|
if (errno == EINTR)
|
|
{
|
|
continue;
|
|
}
|
|
if (read_ret == READ_TIMEOUT)
|
|
{
|
|
continue;
|
|
}
|
|
if (read_ret != READ_OK)
|
|
{
|
|
notifyf(DBUS_CRITICAL, "nDPIsrvd-notifyd", 3000, "nDPIsrvd socket read from %s failed!", serv_optarg);
|
|
syslog(LOG_DAEMON | LOG_ERR, "nDPIsrvd socket read from %s failed!", serv_optarg);
|
|
break;
|
|
}
|
|
|
|
enum nDPIsrvd_parse_return parse_ret = nDPIsrvd_parse_all(sock);
|
|
if (parse_ret != PARSE_NEED_MORE_DATA)
|
|
{
|
|
syslog(LOG_DAEMON | LOG_ERR,
|
|
"Could not parse JSON message %s: %.*s\n",
|
|
nDPIsrvd_enum_to_string(parse_ret),
|
|
nDPIsrvd_json_buffer_length(sock),
|
|
nDPIsrvd_json_buffer_string(sock));
|
|
break;
|
|
}
|
|
}
|
|
|
|
nDPIsrvd_socket_close(sock);
|
|
notifyf(DBUS_NORMAL, "nDPIsrvd-notifyd", 3000, "Disconnected from '%s'.", serv_optarg);
|
|
if (main_thread_shutdown == 0)
|
|
{
|
|
sleep(SLEEP_TIME_IN_S);
|
|
}
|
|
} while (main_thread_shutdown == 0);
|
|
|
|
failure:
|
|
nDPIsrvd_socket_free(&sock);
|
|
daemonize_shutdown(pidfile);
|
|
closelog();
|
|
|
|
return 0;
|
|
}
|