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#include "common/printing.h"
#include "common/jsonconfig.h"
#include "common/strutil.h"
#include "detection/dns/dns.h"
#include "modules/dns/dns.h"
bool ffPrintDNS(FFDNSOptions* options) {
FF_LIST_AUTO_DESTROY result = ffListCreate();
const char* error = ffDetectDNS(options, &result);
if (error) {
ffPrintError(FF_DNS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "%s", error);
return false;
}
if (result.length == 0) {
ffPrintError(FF_DNS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "NO DNS servers detected");
return false;
}
FF_STRBUF_AUTO_DESTROY buf = ffStrbufCreate();
FF_LIST_FOR_EACH (FFstrbuf, item, result) {
if (!ffStrbufContainC(item, '.')) {
continue; // IPv4
}
if (buf.length) {
ffStrbufAppendC(&buf, ' ');
}
ffStrbufAppend(&buf, item);
}
FF_LIST_FOR_EACH (FFstrbuf, item, result) {
if (!ffStrbufContainC(item, ':')) {
continue; // IPv6
}
if (buf.length) {
ffStrbufAppendC(&buf, ' ');
}
ffStrbufAppend(&buf, item);
}
if (options->moduleArgs.outputFormat.length == 0) {
ffPrintLogoAndKey(FF_DNS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
ffStrbufPutTo(&buf, stdout);
} else {
FF_PRINT_FORMAT_CHECKED(FF_DNS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, ((FFformatarg[]) {
FF_ARG(buf, "result"),
}));
}
FF_LIST_FOR_EACH (FFstrbuf, item, result) {
ffStrbufDestroy(item);
}
return true;
}
void ffParseDNSJsonObject(FFDNSOptions* options, yyjson_val* module) {
yyjson_val *key, *val;
size_t idx, max;
yyjson_obj_foreach (module, idx, max, key, val) {
if (ffJsonConfigParseModuleArgs(key, val, &options->moduleArgs)) {
continue;
}
if (unsafe_yyjson_equals_str(key, "showType")) {
int value;
const char* error = ffJsonConfigParseEnum(val, &value, (FFKeyValuePair[]) {
{ "both", FF_DNS_TYPE_BOTH },
{ "ipv4", FF_DNS_TYPE_IPV4_BIT },
{ "ipv6", FF_DNS_TYPE_IPV6_BIT },
{},
});
if (error) {
ffPrintError(FF_DNS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s value: %s", unsafe_yyjson_get_str(key), error);
} else {
options->showType = (FFDNSShowType) value;
}
continue;
}
ffPrintError(FF_DNS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Unknown JSON key %s", unsafe_yyjson_get_str(key));
}
}
void ffGenerateDNSJsonConfig(FFDNSOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
ffJsonConfigGenerateModuleArgsConfig(doc, module, &options->moduleArgs);
switch ((uint8_t) options->showType) {
case FF_DNS_TYPE_IPV4_BIT:
yyjson_mut_obj_add_str(doc, module, "showType", "ipv4");
break;
case FF_DNS_TYPE_IPV6_BIT:
yyjson_mut_obj_add_str(doc, module, "showType", "ipv6");
break;
case FF_DNS_TYPE_BOTH:
yyjson_mut_obj_add_str(doc, module, "showType", "both");
break;
}
}
bool ffGenerateDNSJsonResult(FFDNSOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
FF_LIST_AUTO_DESTROY result = ffListCreate();
const char* error = ffDetectDNS(options, &result);
if (error) {
yyjson_mut_obj_add_str(doc, module, "error", error);
return false;
}
yyjson_mut_val* arr = yyjson_mut_obj_add_arr(doc, module, "result");
FF_LIST_FOR_EACH (FFstrbuf, item, result) {
yyjson_mut_arr_add_strbuf(doc, arr, item);
}
FF_LIST_FOR_EACH (FFstrbuf, item, result) {
ffStrbufDestroy(item);
}
return true;
}
void ffInitDNSOptions(FFDNSOptions* options) {
ffOptionInitModuleArg(&options->moduleArgs, "");
options->showType = FF_DNS_TYPE_BOTH;
}
void ffDestroyDNSOptions(FFDNSOptions* options) {
ffOptionDestroyModuleArg(&options->moduleArgs);
}
FFModuleBaseInfo ffDNSModuleInfo = {
.name = FF_DNS_MODULE_NAME,
.description = "Print configured DNS servers",
.initOptions = (void*) ffInitDNSOptions,
.destroyOptions = (void*) ffDestroyDNSOptions,
.parseJsonObject = (void*) ffParseDNSJsonObject,
.printModule = (void*) ffPrintDNS,
.generateJsonResult = (void*) ffGenerateDNSJsonResult,
.generateJsonConfig = (void*) ffGenerateDNSJsonConfig,
.formatArgs = FF_FORMAT_ARG_LIST(((FFModuleFormatArg[]) {
{ "DNS result", "result" },
}))
};
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