Print ctrl_iface sendto() failures into debug log

This makes it easier to debug issues with control interface operations
failing.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

diff --git a/wpa_supplicant/ctrl_iface_unix.c b/wpa_supplicant/ctrl_iface_unix.c
index e35d2c3..49489d6 100644 (file)
--- a/wpa_supplicant/ctrl_iface_unix.c
+++ b/wpa_supplicant/ctrl_iface_unix.c
@@ -182,15 +182,27 @@ static void wpa_supplicant_ctrl_iface_receive(int sock, void *eloop_ctx,
        }
 
        if (reply) {
-               sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
-                      fromlen);
+               if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
+                          fromlen) < 0) {
+                       wpa_dbg(wpa_s, MSG_DEBUG,
+                               "ctrl_iface sendto failed: %s",
+                               strerror(errno));
+               }
                os_free(reply);
        } else if (reply_len == 1) {
-               sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
-                      fromlen);
+               if (sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
+                          fromlen) < 0) {
+                       wpa_dbg(wpa_s, MSG_DEBUG,
+                               "ctrl_iface sendto failed: %s",
+                               strerror(errno));
+               }
        } else if (reply_len == 2) {
-               sendto(sock, "OK\n", 3, 0, (struct sockaddr *) &from,
-                      fromlen);
+               if (sendto(sock, "OK\n", 3, 0, (struct sockaddr *) &from,
+                          fromlen) < 0) {
+                       wpa_dbg(wpa_s, MSG_DEBUG,
+                               "ctrl_iface sendto failed: %s",
+                               strerror(errno));
+               }
        }
 
        if (new_attached)
@@ -656,18 +668,30 @@ void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
                        /* handle ATTACH signal of first monitor interface */
                        if (!wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst,
                                                              &from, fromlen)) {
-                               sendto(priv->sock, "OK\n", 3, 0,
-                                      (struct sockaddr *) &from, fromlen);
+                               if (sendto(priv->sock, "OK\n", 3, 0,
+                                          (struct sockaddr *) &from, fromlen) <
+                                   0) {
+                                       wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
+                                                  strerror(errno));
+                               }
                                /* OK to continue */
                                return;
                        } else {
-                               sendto(priv->sock, "FAIL\n", 5, 0,
-                                      (struct sockaddr *) &from, fromlen);
+                               if (sendto(priv->sock, "FAIL\n", 5, 0,
+                                          (struct sockaddr *) &from, fromlen) <
+                                   0) {
+                                       wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
+                                                  strerror(errno));
+                               }
                        }
                } else {
                        /* return FAIL for all other signals */
-                       sendto(priv->sock, "FAIL\n", 5, 0,
-                              (struct sockaddr *) &from, fromlen);
+                       if (sendto(priv->sock, "FAIL\n", 5, 0,
+                                  (struct sockaddr *) &from, fromlen) < 0) {
+                               wpa_printf(MSG_DEBUG,
+                                          "ctrl_iface sendto failed: %s",
+                                          strerror(errno));
+                       }
                }
        }
 }
@@ -714,14 +738,24 @@ static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
        }
 
        if (reply) {
-               sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
-                      fromlen);
+               if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
+                          fromlen) < 0) {
+                       wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
+                               strerror(errno));
+               }
                os_free(reply);
        } else if (reply_len == 1) {
-               sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
-                      fromlen);
+               if (sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
+                          fromlen) < 0) {
+                       wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
+                                  strerror(errno));
+               }
        } else if (reply_len == 2) {
-               sendto(sock, "OK\n", 3, 0, (struct sockaddr *) &from, fromlen);
+               if (sendto(sock, "OK\n", 3, 0, (struct sockaddr *) &from,
+                          fromlen) < 0) {
+                       wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
+                               strerror(errno));
+               }
        }
 }