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stream: Explicitly document MSG_NOTIFICATION case in recv() API

Change-Id: I4fa70ae3f704d2379982153b5630009c13a6f316
---
M src/stream_cli.c
M src/stream_srv.c
2 files changed, 3 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/libosmo-netif refs/changes/90/38890/1

diff --git a/src/stream_cli.c b/src/stream_cli.c
index 5d8a2c2..b0dac09 100644
--- a/src/stream_cli.c
+++ b/src/stream_cli.c
@@ -1159,7 +1159,7 @@
 	}
 
 	if (ret < 0) {
-		if (ret == -EAGAIN)
+		if (ret == -EAGAIN) /* Received MSG_NOTIFICATION from stream_sctp_recvmsg_wrapper() */
 			return ret;
 		if (errno == EPIPE || errno == ECONNRESET)
 			LOGSCLI(cli, LOGL_ERROR, "lost connection with srv\n");
diff --git a/src/stream_srv.c b/src/stream_srv.c
index dad6b7a..9b39bdc 100644
--- a/src/stream_srv.c
+++ b/src/stream_srv.c
@@ -1181,6 +1181,8 @@
 	}
 
 	if (ret < 0) {
+		if (ret == -EAGAIN) /* Received MSG_NOTIFICATION from stream_sctp_recvmsg_wrapper() */
+			return ret;
 		if (errno == EPIPE || errno == ECONNRESET)
 			LOGSSRV(conn, LOGL_ERROR, "lost connection with client\n");
 		return ret;

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