[PATCH 6/9] wpa_supplicant: monitor support for global ctrl UDP iface

[Janusz Dziedzic]

Add monitor support (ATTACH/DETACH) for global ctrl iface
and UDP.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic at tieto.com>
---
 wpa_supplicant/ctrl_iface_udp.c | 94 ++++++++++++++++++++++++++++++++---------
 1 file changed, 74 insertions(+), 20 deletions(-)

diff --git a/wpa_supplicant/ctrl_iface_udp.c b/wpa_supplicant/ctrl_iface_udp.c
index 8c5c038..b83d359 100644
--- a/wpa_supplicant/ctrl_iface_udp.c
+++ b/wpa_supplicant/ctrl_iface_udp.c
@@ -45,7 +45,16 @@ struct ctrl_iface_priv {
 };
 
 
-static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
+struct ctrl_iface_global_priv {
+	int sock;
+	struct wpa_ctrl_dst *ctrl_dst;
+	u8 cookie[COOKIE_LEN];
+};
+
+
+static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s,
+					   const char *ifname, int sock,
+					   struct wpa_ctrl_dst **head,
 					   int level, const char *buf,
 					   size_t len);
 
@@ -299,9 +308,27 @@ static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level,
 					     const char *txt, size_t len)
 {
 	struct wpa_supplicant *wpa_s = ctx;
-	if (wpa_s == NULL || wpa_s->ctrl_iface == NULL)
+
+	if (wpa_s == NULL)
+		return;
+
+	if (type != WPA_MSG_NO_GLOBAL && wpa_s->global->ctrl_iface) {
+		struct ctrl_iface_global_priv *priv = wpa_s->global->ctrl_iface;
+		if (priv->ctrl_dst) {
+			wpa_supplicant_ctrl_iface_send(
+					wpa_s,
+					type != WPA_MSG_PER_INTERFACE ?
+					NULL : wpa_s->ifname,
+					priv->sock, &priv->ctrl_dst, level, txt, len);
+		}
+	}
+
+	if (type == WPA_MSG_ONLY_GLOBAL || wpa_s->ctrl_iface == NULL)
 		return;
-	wpa_supplicant_ctrl_iface_send(wpa_s->ctrl_iface, level, txt, len);
+
+	wpa_supplicant_ctrl_iface_send(wpa_s, NULL, wpa_s->ctrl_iface->sock,
+				       &wpa_s->ctrl_iface->ctrl_dst,
+				       level, txt, len);
 }
 
 
@@ -408,23 +435,29 @@ void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
 }
 
 
-static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
+static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s,
+					   const char *ifname, int sock,
+					   struct wpa_ctrl_dst **head,
 					   int level, const char *buf,
 					   size_t len)
 {
 	struct wpa_ctrl_dst *dst, *next;
 	char host[NI_MAXHOST] = {0};
 	char service[NI_MAXSERV] = {0};
-	char levelstr[10];
+	char levelstr[64];
 	int idx;
 	char *sbuf;
 	int llen;
 
-	dst = priv->ctrl_dst;
-	if (priv->sock < 0 || dst == NULL)
+	dst = *head;
+	if (sock < 0 || dst == NULL)
 		return;
 
-	os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
+	if (ifname)
+		os_snprintf(levelstr, sizeof(levelstr), "IFACE=%s <%d>",
+			    ifname, level);
+	else
+		os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
 
 	llen = os_strlen(levelstr);
 	sbuf = os_malloc(llen + len);
@@ -446,7 +479,7 @@ static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
 			wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor send %s:%s",
 				   host, service);
 
-			if (sendto(priv->sock, sbuf, llen + len, 0,
+			if (sendto(sock, sbuf, llen + len, 0,
 				   (struct sockaddr *) &dst->addr,
 				   dst->addrlen) < 0) {
 				wpa_printf(MSG_ERROR,
@@ -455,7 +488,7 @@ static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
 				dst->errors++;
 				if (dst->errors > 10) {
 					wpa_supplicant_ctrl_iface_detach(
-						&priv->ctrl_dst, &dst->addr,
+						head, &dst->addr,
 						dst->addrlen);
 				}
 			} else
@@ -478,12 +511,6 @@ void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
 
 /* Global ctrl_iface */
 
-struct ctrl_iface_global_priv {
-	int sock;
-	u8 cookie[COOKIE_LEN];
-};
-
-
 static char *
 wpa_supplicant_global_get_cookie(struct ctrl_iface_global_priv *priv,
 				 size_t *reply_len)
@@ -513,7 +540,7 @@ static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
 	int res;
 	struct sockaddr_in from;
 	socklen_t fromlen = sizeof(from);
-	char *reply;
+	char *reply = NULL;
 	size_t reply_len;
 	u8 cookie[COOKIE_LEN];
 
@@ -554,17 +581,32 @@ static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
 	while (*pos == ' ')
 		pos++;
 
-	reply = wpa_supplicant_global_ctrl_iface_process(global, pos,
-							 &reply_len);
+	if (os_strcmp(pos, "ATTACH") == 0) {
+		if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, (struct sockaddr_storage *) &from, fromlen))
+			reply_len = 1;
+		else
+			reply_len = 2;
+	} else if (os_strcmp(pos, "DETACH") == 0) {
+		if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, (struct sockaddr_storage *)&from, fromlen))
+			reply_len = 1;
+		else
+			reply_len = 2;
+	} else {
+		reply = wpa_supplicant_global_ctrl_iface_process(global, pos,
+								 &reply_len);
+	}
 
  done:
 	if (reply) {
 		sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
 		       fromlen);
 		os_free(reply);
-	} else if (reply_len) {
+	} else if (reply_len == 1) {
 		sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
 		       fromlen);
+	} else if (reply_len == 2) {
+		sendto(sock, "OK\n", 3, 0, (struct sockaddr *) &from,
+		       fromlen);
 	}
 }
 
@@ -635,6 +677,8 @@ try_again:
 				 wpa_supplicant_global_ctrl_iface_receive,
 				 global, priv);
 
+	wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
+
 	return priv;
 
 fail:
@@ -648,9 +692,19 @@ fail:
 void
 wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
 {
+	struct wpa_ctrl_dst *dst, *prev;
+
 	if (priv->sock >= 0) {
 		eloop_unregister_read_sock(priv->sock);
 		close(priv->sock);
 	}
+
+	dst = priv->ctrl_dst;
+	while (dst) {
+		prev = dst;
+		dst = dst->next;
+		os_free(prev);
+	}
+
 	os_free(priv);
 }
-- 
1.9.1