[cygwin] fix mod_proxy and mod_fastcgi ioctl use

cygwin does not support ioctl on sockets, returning EOPTNOTSUPP
(would be better if cygwin used Windows ioctlsocket() instead)

Windows uses signed (socklen_t), so add some casts to quiet warnings

Windows path handling is convoluted, so disable one tests in mod_fastcgi
since trailing spaces are removed from URL for _WIN32 and __CYGWIN__ in
response.c

src/http-header-glue.c

@@ -143,7 +143,7 @@ int http_response_redirect_to_directory(server *srv, connection *con) {
 		our_addr_len = sizeof(our_addr);
 
 		if (-1 == getsockname(con->fd, (struct sockaddr *)&our_addr, &our_addr_len)
-		    || our_addr_len > sizeof(our_addr)) {
+		    || our_addr_len > (socklen_t)sizeof(our_addr)) {
 			con->http_status = 500;
 
 			log_error_write(srv, __FILE__, __LINE__, "ss",

src/mod_fastcgi.c

@@ -2009,7 +2009,7 @@ static int fcgi_create_env(server *srv, handler_ctx *hctx, int request_id) {
 	our_addr_len = sizeof(our_addr);
 
 	if (-1 == getsockname(con->fd, (struct sockaddr *)&our_addr, &our_addr_len)
-	    || our_addr_len > sizeof(our_addr)) {
+	    || our_addr_len > (socklen_t)sizeof(our_addr)) {
 		s = inet_ntop_cache_get_ip(srv, &(srv_sock->addr));
 	} else {
 		s = inet_ntop_cache_get_ip(srv, &(our_addr));
@@ -2496,7 +2496,7 @@ static int fastcgi_get_packet(server *srv, handler_ctx *hctx, fastcgi_response_p
 static int fcgi_demux_response(server *srv, handler_ctx *hctx) {
 	int fin = 0;
 	int toread, ret;
-	ssize_t r;
+	ssize_t r = 0;
 
 	plugin_data *p    = hctx->plugin_data;
 	connection *con   = hctx->remote_conn;
@@ -2507,6 +2507,7 @@ static int fcgi_demux_response(server *srv, handler_ctx *hctx) {
 	/*
 	 * check how much we have to read
 	 */
+      #if !defined(_WIN32) && !defined(__CYGWIN__)
 	if (ioctl(hctx->fd, FIONREAD, &toread)) {
 		if (errno == EAGAIN) {
 			fdevent_event_add(srv->ev, &(hctx->fde_ndx), hctx->fd, FDEVENT_IN);
@@ -2517,6 +2518,9 @@ static int fcgi_demux_response(server *srv, handler_ctx *hctx) {
 				fcgi_fd);
 		return -1;
 	}
+      #else
+	toread = 4096;
+      #endif
 
 	if (toread > 0) {
 		char *mem;
@@ -2547,7 +2551,8 @@ static int fcgi_demux_response(server *srv, handler_ctx *hctx) {
 					fcgi_fd, strerror(errno));
 			return -1;
 		}
-	} else {
+	}
+	if (0 == r) {
 		log_error_write(srv, __FILE__, __LINE__, "ssdsb",
 				"unexpected end-of-file (perhaps the fastcgi process died):",
 				"pid:", proc->pid,

src/mod_proxy.c

@@ -628,6 +628,7 @@ static int proxy_demux_response(server *srv, handler_ctx *hctx) {
 	int proxy_fd       = hctx->fd;
 
 	/* check how much we have to read */
+      #if !defined(_WIN32) && !defined(__CYGWIN__)
 	if (ioctl(hctx->fd, FIONREAD, &b)) {
 		if (errno == EAGAIN) {
 			fdevent_event_add(srv->ev, &(hctx->fde_ndx), hctx->fd, FDEVENT_IN);
@@ -638,6 +639,9 @@ static int proxy_demux_response(server *srv, handler_ctx *hctx) {
 				proxy_fd);
 		return -1;
 	}
+      #else
+	b = 4096;
+      #endif
 
 
 	if (p->conf.debug) {
@@ -675,6 +679,10 @@ static int proxy_demux_response(server *srv, handler_ctx *hctx) {
 			return -1;
 		}
 
+	      #if defined(_WIN32) || defined(__CYGWIN__)
+		if (0 == r) return 1; /* fin */
+	      #endif
+
 		/* this should be catched by the b > 0 above */
 		force_assert(r);
 

src/mod_scgi.c

@@ -1618,7 +1618,7 @@ static int scgi_create_env(server *srv, handler_ctx *hctx) {
 	our_addr_len = sizeof(our_addr);
 
 	if (-1 == getsockname(con->fd, (struct sockaddr *)&our_addr, &our_addr_len)
-	    || our_addr_len > sizeof(our_addr)) {
+	    || our_addr_len > (socklen_t)sizeof(our_addr)) {
 		s = inet_ntop_cache_get_ip(srv, &(srv_sock->addr));
 	} else {
 		s = inet_ntop_cache_get_ip(srv, &(our_addr));

tests/mod-fastcgi.t

@@ -129,12 +129,16 @@ EOF
 	$t->{RESPONSE} = [ { 'HTTP-Protocol' => 'HTTP/1.0', 'HTTP-Status' => 200 } ];
 	ok($tf->handle_http($t) == 0, 'PATHINFO');
 
+    if ($^O ne "cygwin") {
 	$t->{REQUEST}  = ( <<EOF
 GET /cgi.php%20%20%20 HTTP/1.0
 EOF
  );
 	$t->{RESPONSE} = [ { 'HTTP-Protocol' => 'HTTP/1.0', 'HTTP-Status' => 404 } ];
 	ok($tf->handle_http($t) == 0, 'No source retrieval');
+    } else {
+	ok(1, 'No source retrieval; skipped on cygwin; see response.c');
+    }
 
 	$t->{REQUEST}  = ( <<EOF
 GET /www/abc/def HTTP/1.0