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#include <dnswire/writer.h>
#include <dnswire/reader.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/wait.h>
#include "print_dnstap.c"
int main(int argc, const char* argv[])
{
if (argc < 2) {
return 1;
}
struct sockaddr_un path;
memset(&path, 0, sizeof(struct sockaddr_un));
path.sun_family = AF_UNIX;
strncpy(path.sun_path, argv[1], sizeof(path.sun_path) - 1);
int readfd = socket(AF_UNIX, SOCK_STREAM, 0);
if (readfd == -1
|| bind(readfd, (struct sockaddr*)&path, sizeof(struct sockaddr_un))
|| listen(readfd, 1)) {
close(readfd);
return 1;
}
fprintf(stderr, "bind & listen\n");
int fd, ret = 1;
alarm(5);
if ((fd = accept(readfd, 0, 0))) {
fprintf(stderr, "accept\n");
struct dnswire_reader reader;
if (dnswire_reader_init(&reader) != dnswire_ok) {
return 1;
}
dnswire_reader_allow_bidirectional(&reader, true);
// force small buffers to trigger buf resizing
reader.write_size = 4;
reader.write_inc = 4;
if (dnswire_reader_set_bufsize(&reader, 4) != dnswire_ok) {
return 1;
}
if (dnswire_reader_set_bufinc(&reader, 4) != dnswire_ok) {
return 1;
}
int done = 0;
while (!done) {
switch (dnswire_reader_read(&reader, fd)) {
case dnswire_have_dnstap:
print_dnstap(dnswire_reader_dnstap(reader));
fflush(stdout);
break;
case dnswire_again:
case dnswire_need_more:
break;
case dnswire_endofdata:
done = 1;
break;
default:
fprintf(stderr, "dnswire_reader_read() error\n");
shutdown(fd, SHUT_RDWR);
close(fd);
close(readfd);
return 1;
}
}
dnswire_reader_destroy(reader);
shutdown(fd, SHUT_RDWR);
close(fd);
}
close(readfd);
return ret;
}
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