15   if (-1 == setsockopt(fd, level, opt, val, len)) perror_exit("setsockopt");  in xsetsockopt()
43   int fd = -1, one = 1;  in xconnbind()
45   // Try all the returned addresses. Report errors if last entry can't connect.  in xconnbind()
46   for (ai = ai_arg; ai; ai = ai->ai_next) {  in xconnbind()
47     fd = (ai->ai_next ? socket : xsocket)(ai->ai_family, ai->ai_socktype,  in xconnbind()
48       ai->ai_protocol);  in xconnbind()
50     if (!(dobind ? bind : connect)(fd, ai->ai_addr, ai->ai_addrlen)) break;  in xconnbind()
51     else if (!ai->ai_next) perror_exit_raw(dobind ? "bind" : "connect");  in xconnbind()
77   if (connect(fd, sa, len)) perror_exit("connect");  in xconnect()
80 int xpoll(struct pollfd *fds, int nfds, int timeout)  in xpoll()  argument
83   long long now, then = timeout>0 ? millitime() : 0;  in xpoll()
86     if (0<=(i = poll(fds, nfds, timeout)) || toys.signal) return i;  in xpoll()
90       timeout -= now-then;  in xpoll()
97 // half-connection shutdown. timeouts return if no data for X ms.
98 // Returns 0: both closed, 1 shutdown_timeout, 2 timeout
101               int timeout, int shutdown_timeout)  in pollinate()  argument
113     if (!xpoll(pollfds, pollcount, timeout)) return pollcount;  in pollinate()
125         // Close half-connection.  This is needed for things like  in pollinate()
127         // Note that in1 closing triggers timeout, in2 returns now.  in pollinate()
130           pollcount--;  in pollinate()
131           timeout = shutdown_timeout;  in pollinate()
143   if (sa->sa_family == AF_INET) addr = &((struct sockaddr_in *)sa)->sin_addr;  in ntop()
144   else addr = &((struct sockaddr_in6 *)sa)->sin6_addr;  in ntop()
146   inet_ntop(sa->sa_family, addr, libbuf, sizeof(libbuf));  in ntop()
154     dest->sa_family == AF_INET ? sizeof(struct sockaddr_in) :  in xsendto()
160 // xrecvfrom with timeout in milliseconds
161 int xrecvwait(int fd, char *buf, int len, union socksaddr *sa, int timeout)  in xrecvwait()  argument
165   if (timeout >= 0) {  in xrecvwait()
170     if (!xpoll(&pfd, 1, timeout)) return 0;  in xrecvwait()