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Support asynchronous connect() in Unix networking. Now a port

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forwarding to a nonexistent host shouldn't hold up the rest of the
program.

[originally from svn r2514]
This commit is contained in:
Simon Tatham 2003-01-09 18:14:24 +00:00
parent 4d86f5979d
commit f928707849
1 changed files with 16 additions and 13 deletions
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29
unix/uxnet.c
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@ -490,6 +490,11 @@ Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
a.sin_port = htons((short) port);
}
{
int i = 1;
ioctl(s, FIONBIO, &i);
}
if ((
#ifdef IPV6
connect(s, ((addr->family == AF_INET6) ?
@ -499,13 +504,7 @@ Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
connect(s, (struct sockaddr *) &a, sizeof(a))
#endif
) < 0) {
/*
* FIXME: We are prepared to receive EWOULDBLOCK here,
* because we might want the connection to be made
* asynchronously; but how do we actually arrange this in
* Unix? I forget.
*/
if ( errno != EWOULDBLOCK ) {
if ( errno != EINPROGRESS ) {
ret->error = error_string(errno);
return (Socket) ret;
}
@ -782,11 +781,6 @@ int select_result(int fd, int event)
noise_ultralight(event);
switch (event) {
#ifdef FIXME_NONBLOCKING_CONNECTIONS
case FIXME: /* connected */
s->connected = s->writable = 1;
break;
#endif
case 4: /* exceptional */
if (!s->oobinline) {
/*
@ -883,7 +877,14 @@ int select_result(int fd, int event)
}
break;
case 2: /* writable */
{
if (!s->connected) {
/*
* select() reports a socket as _writable_ when an
* asynchronous connection is completed.
*/
s->connected = s->writable = 1;
break;
} else {
int bufsize_before, bufsize_after;
s->writable = 1;
bufsize_before = s->sending_oob + bufchain_size(&s->output_data);
@ -988,6 +989,8 @@ static void sk_tcp_set_frozen(Socket sock, int is_frozen)
static void set_rwx(Actual_Socket s, int *rwx)
{
int val = 0;
if (!s->connected)
val |= 2; /* write == connect */
if (s->connected && !s->frozen)
val |= 1 | 4; /* read, except */
if (bufchain_size(&s->output_data))