[PATCH 1/4] wpa_supplicant: fix p2p_group_add when CTRL UDP used

[Janusz Dziedzic]

While p2p_group_add ctrl_interface name could be derived
from main interface (simple p2p_group_add command), we
failed to bind the same udp port. Fix this problem and
also setup correct ctrl_interface name (port decrement).

Signed-off-by: Janusz Dziedzic <janusz.dziedzic at tieto.com>
---
 wpa_supplicant/ctrl_iface_udp.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/wpa_supplicant/ctrl_iface_udp.c b/wpa_supplicant/ctrl_iface_udp.c
index 503052a..5d50b48 100644
--- a/wpa_supplicant/ctrl_iface_udp.c
+++ b/wpa_supplicant/ctrl_iface_udp.c
@@ -378,6 +378,7 @@ struct ctrl_iface_priv *
 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
 {
 	struct ctrl_iface_priv *priv;
+	char port_str[40];
 	int port = WPA_CTRL_IFACE_PORT;
 	char *pos;
 #ifdef CONFIG_CTRL_IFACE_UDP_IPV6
@@ -439,13 +440,21 @@ try_again:
 #endif /* CONFIG_CTRL_IFACE_UDP_IPV6 */
 	if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 		port--;
-		if ((WPA_CTRL_IFACE_PORT - port) < WPA_CTRL_IFACE_PORT_LIMIT &&
-		    !pos)
+		if ((WPA_CTRL_IFACE_PORT - port) < WPA_CTRL_IFACE_PORT_LIMIT)
 			goto try_again;
 		wpa_printf(MSG_ERROR, "bind(AF_INET): %s", strerror(errno));
 		goto fail;
 	}
 
+	/* Setup correct ctrl_interface */
+	os_snprintf(port_str, sizeof(port_str), "udp:%d", port);
+	os_free(wpa_s->conf->ctrl_interface);
+	wpa_s->conf->ctrl_interface = os_strdup(port_str);
+	if (!wpa_s->conf->ctrl_interface) {
+		wpa_msg(wpa_s, MSG_DEBUG, "failed to malloc ctrl_inteface");
+		goto fail;
+	}
+
 #ifdef CONFIG_CTRL_IFACE_UDP_REMOTE
 	wpa_msg(wpa_s, MSG_DEBUG, "ctrl_iface_init UDP port: %d", port);
 #endif /* CONFIG_CTRL_IFACE_UDP_REMOTE */
-- 
1.9.1