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#include <unistd.h>
#include <sys/un.h>
#include "config.h"
#include "fstrm_logger.hh"
#ifdef RECURSOR
#include "logger.hh"
#include "logging.hh"
#else
#include "dolog.hh"
#endif
#define DNSTAP_CONTENT_TYPE "protobuf:dnstap.Dnstap"
#ifdef HAVE_FSTRM
FrameStreamLogger::FrameStreamLogger(const int family, const std::string& address, bool connect,
const std::unordered_map<string,unsigned>& options): d_family(family), d_address(address)
{
fstrm_res res;
try {
d_fwopt = fstrm_writer_options_init();
if (!d_fwopt) {
throw std::runtime_error("FrameStreamLogger: fstrm_writer_options_init failed.");
}
res = fstrm_writer_options_add_content_type(d_fwopt, DNSTAP_CONTENT_TYPE, sizeof(DNSTAP_CONTENT_TYPE) - 1);
if (res != fstrm_res_success) {
throw std::runtime_error("FrameStreamLogger: fstrm_writer_options_add_content_type failed: " + std::to_string(res));
}
if (d_family == AF_UNIX) {
struct sockaddr_un local;
if (makeUNsockaddr(d_address, &local)) {
throw std::runtime_error("FrameStreamLogger: Unable to use '" + d_address + "', it is not a valid UNIX socket path.");
}
d_uwopt = fstrm_unix_writer_options_init();
if (!d_uwopt) {
throw std::runtime_error("FrameStreamLogger: fstrm_unix_writer_options_init failed.");
}
// void return, no error checking.
fstrm_unix_writer_options_set_socket_path(d_uwopt, d_address.c_str());
d_writer = fstrm_unix_writer_init(d_uwopt, d_fwopt);
if (!d_writer) {
throw std::runtime_error("FrameStreamLogger: fstrm_unix_writer_init() failed.");
}
#ifdef HAVE_FSTRM_TCP_WRITER_INIT
} else if (family == AF_INET) {
d_twopt = fstrm_tcp_writer_options_init();
if (!d_twopt) {
throw std::runtime_error("FrameStreamLogger: fstrm_tcp_writer_options_init failed.");
}
try {
ComboAddress ca(d_address);
// void return, no error checking.
fstrm_tcp_writer_options_set_socket_address(d_twopt, ca.toString().c_str());
fstrm_tcp_writer_options_set_socket_port(d_twopt, std::to_string(ca.getPort()).c_str());
} catch (PDNSException &e) {
throw std::runtime_error("FrameStreamLogger: Unable to use '" + d_address + "': " + e.reason);
}
d_writer = fstrm_tcp_writer_init(d_twopt, d_fwopt);
if (!d_writer) {
throw std::runtime_error("FrameStreamLogger: fstrm_tcp_writer_init() failed.");
}
#endif
} else {
throw std::runtime_error("FrameStreamLogger: family " + std::to_string(family) + " not supported");
}
d_iothropt = fstrm_iothr_options_init();
if (!d_iothropt) {
throw std::runtime_error("FrameStreamLogger: fstrm_iothr_options_init() failed.");
}
res = fstrm_iothr_options_set_queue_model(d_iothropt, FSTRM_IOTHR_QUEUE_MODEL_MPSC);
if (res != fstrm_res_success) {
throw std::runtime_error("FrameStreamLogger: fstrm_iothr_options_set_queue_model failed: " + std::to_string(res));
}
const struct {
const std::string name;
fstrm_res (*function)(struct fstrm_iothr_options *, const unsigned int);
} list[] = {
{ "bufferHint", fstrm_iothr_options_set_buffer_hint },
{ "flushTimeout", fstrm_iothr_options_set_flush_timeout },
{ "inputQueueSize", fstrm_iothr_options_set_input_queue_size },
{ "outputQueueSize", fstrm_iothr_options_set_output_queue_size },
{ "queueNotifyThreshold", fstrm_iothr_options_set_queue_notify_threshold },
{ "setReopenInterval", fstrm_iothr_options_set_reopen_interval }
};
for (const auto& i : list) {
if (options.find(i.name) != options.end() && options.at(i.name)) {
fstrm_res r = i.function(d_iothropt, options.at(i.name));
if (r != fstrm_res_success) {
throw std::runtime_error("FrameStreamLogger: setting " + string(i.name) + " failed: " + std::to_string(r));
}
}
}
if (connect) {
d_iothr = fstrm_iothr_init(d_iothropt, &d_writer);
if (!d_iothr) {
throw std::runtime_error("FrameStreamLogger: fstrm_iothr_init() failed.");
}
d_ioqueue = fstrm_iothr_get_input_queue(d_iothr);
if (!d_ioqueue) {
throw std::runtime_error("FrameStreamLogger: fstrm_iothr_get_input_queue() failed.");
}
}
} catch (std::runtime_error &e) {
this->cleanup();
throw;
}
}
void FrameStreamLogger::cleanup()
{
if (d_iothr != nullptr) {
fstrm_iothr_destroy(&d_iothr);
d_iothr = nullptr;
}
if (d_iothropt != nullptr) {
fstrm_iothr_options_destroy(&d_iothropt);
d_iothropt = nullptr;
}
if (d_writer != nullptr) {
fstrm_writer_destroy(&d_writer);
d_writer = nullptr;
}
if (d_uwopt != nullptr) {
fstrm_unix_writer_options_destroy(&d_uwopt);
d_uwopt = nullptr;
}
#ifdef HAVE_FSTRM_TCP_WRITER_INIT
if (d_twopt != nullptr) {
fstrm_tcp_writer_options_destroy(&d_twopt);
d_twopt = nullptr;
}
#endif
if (d_fwopt != nullptr) {
fstrm_writer_options_destroy(&d_fwopt);
d_fwopt = nullptr;
}
}
FrameStreamLogger::~FrameStreamLogger()
{
this->cleanup();
}
RemoteLoggerInterface::Result FrameStreamLogger::queueData(const std::string& data)
{
if (!d_ioqueue || !d_iothr) {
++d_permanentFailures;
return Result::OtherError;
}
uint8_t *frame = (uint8_t*)malloc(data.length());
if (!frame) {
++d_queueFullDrops; // XXX separate count?
return Result::TooLarge;
}
memcpy(frame, data.c_str(), data.length());
fstrm_res res;
res = fstrm_iothr_submit(d_iothr, d_ioqueue, frame, data.length(), fstrm_free_wrapper, nullptr);
if (res == fstrm_res_success) {
// Frame successfully queued.
++d_framesSent;
return Result::Queued;
} else if (res == fstrm_res_again) {
free(frame);
++d_queueFullDrops;
return Result::PipeFull;
} else {
// Permanent failure.
free(frame);
++d_permanentFailures;
return Result::OtherError;
}
}
#endif /* HAVE_FSTRM */
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