int net_connect_complete(struct pollfd pfds[2])
{
unsigned int i;
assert(pfds[0].fd != -1 || pfds[1].fd != -1);
for (i = 0; i < 2; i++) {
int err;
socklen_t errlen = sizeof(err);
if (pfds[i].fd == -1)
continue;
if (getsockopt(pfds[i].fd, SOL_SOCKET, SO_ERROR, &err,
&errlen) != 0) {
net_connect_abort(pfds);
return -1;
}
if (err == 0) {
/* Don't hand them non-blocking fd! */
if (!set_nonblock(pfds[i].fd, false)) {
net_connect_abort(pfds);
return -1;
}
/* Close other one. */
if (pfds[!i].fd != -1)
close(pfds[!i].fd);
return pfds[i].fd;
}
}
/* Still going... */
errno = EINPROGRESS;
return -1;
}
int net_connect_complete(struct pollfd pfds[2])
{
unsigned int i;
assert(pfds[0].fd != -1 || pfds[1].fd != -1);
for (i = 0; i < 2; i++) {
int err;
socklen_t errlen = sizeof(err);
if (pfds[i].fd == -1)
continue;
if (pfds[i].revents & POLLHUP) {
/* Linux gives this if connecting to local
* non-listening port */
close(pfds[i].fd);
pfds[i].fd = -1;
if (pfds[!i].fd == -1) {
errno = ECONNREFUSED;
return -1;
}
continue;
}
if (!(pfds[i].revents & POLLOUT))
continue;
if (getsockopt(pfds[i].fd, SOL_SOCKET, SO_ERROR, &err,
&errlen) != 0) {
net_connect_abort(pfds);
return -1;
}
if (err == 0) {
/* Don't hand them non-blocking fd! */
if (!set_nonblock(pfds[i].fd, false)) {
net_connect_abort(pfds);
return -1;
}
/* Close other one. */
if (pfds[!i].fd != -1)
close(pfds[!i].fd);
return pfds[i].fd;
}
}
/* Still going... */
errno = EINPROGRESS;
return -1;
}
int net_connect(const struct addrinfo *addrinfo)
{
struct pollfd pfds[2];
int sockfd;
sockfd = net_connect_async(addrinfo, pfds);
/* Immediate connect or error is easy. */
if (sockfd >= 0 || errno != EINPROGRESS)
return sockfd;
while (poll(pfds, 2, -1) != -1) {
sockfd = net_connect_complete(pfds);
if (sockfd >= 0 || errno != EINPROGRESS)
return sockfd;
}
net_connect_abort(pfds);
return -1;
}