osmux: Log sendto() error

Change-Id: I195ebe0fdb05195a7f3b1390630e83084b5dea3a
---
M src/common/osmux.c
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/common/osmux.c b/src/common/osmux.c
index d1d8355..e443d1d 100644
--- a/src/common/osmux.c
+++ b/src/common/osmux.c
@@ -78,6 +78,7 @@
 	struct osmux_handle *handle = data;
 	struct gsm_bts *bts = handle->bts;
 	socklen_t dest_len;
+	ssize_t rc;
 
 	switch (handle->rem_addr.u.sa.sa_family) {
 	case AF_INET6:
@@ -88,8 +89,14 @@
 		dest_len = sizeof(handle->rem_addr.u.sin);
 		break;
 	}
-	sendto(bts->osmux.fd.fd, batch_msg->data, batch_msg->len, 0,
+	rc = sendto(bts->osmux.fd.fd, batch_msg->data, batch_msg->len, 0,
 		(struct sockaddr *)&handle->rem_addr.u.sa, dest_len);
+	if (rc < 0) {
+		char errbuf[129];
+		strerror_r(errno, errbuf, sizeof(errbuf));
+		LOGP(DOSMUX, LOGL_ERROR, "osmux sendto(%s) failed: %s\n",
+			 osmo_sockaddr_to_str(&handle->rem_addr), errbuf);
+	}
 	msgb_free(batch_msg);
 }
 

