struct sockaddr_in6 sin6;
} sa;
socklen_t len;
+ fd_set fds;
+ struct timeval tv;
static const struct addrinfo pref = {
- 0, /* ai_flags */
- AF_UNSPEC, /* ai_family */
- SOCK_DGRAM, /* ai_socktype */
- IPPROTO_UDP, /* ai_protocol */
- 0,
- 0,
- 0,
- 0
+ .ai_flags = 0,
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_DGRAM,
+ .ai_protocol = IPPROTO_UDP,
};
set_progname(argv);
if(!(ai = get_address(&a, &pref, &name)))
exit(1);
fd = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+ nonblock(fd);
if(bind(fd, ai->ai_addr, ai->ai_addrlen) < 0)
fatal(errno, "error binding to %s", name);
while(getppid() != 1) {
+ /* Wait for something to happen. We don't just block forever in recvfrom()
+ * as otherwise we'd never die if the parent terminated uncontrolledly. */
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+ select(fd + 1, &fds, 0, 0, &tv);
len = sizeof sa;
n = recvfrom(fd, buffer, sizeof buffer, 0, &sa.sa, &len);
if(n < 0) {