netdev - [PATCH net-next 05/10] sctp: introduce sctp_chunk_stream

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Message-Id: <0dd42e7d58493629797cdf69528090c8e5852b27.1506536044.git.marcelo.leitner@gmail.com>
Date:   Thu, 28 Sep 2017 17:25:18 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     netdev@...r.kernel.org
Cc:     linux-sctp@...r.kernel.org, Neil Horman <nhorman@...driver.com>,
        Vlad Yasevich <vyasevich@...il.com>,
        Xin Long <lucien.xin@...il.com>,
        David Laight <David.Laight@...LAB.COM>
Subject: [PATCH net-next 05/10] sctp: introduce sctp_chunk_stream_no

Add a helper to fetch the stream number from a given chunk.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
---
 include/net/sctp/structs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 9b2b30b3ba4dfd10c24c3e06ed80779180a06baf..c48f7999fe9b80c5b5e41910a3608059b94140a7 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -642,6 +642,11 @@ void sctp_init_addrs(struct sctp_chunk *, union sctp_addr *,
 		     union sctp_addr *);
 const union sctp_addr *sctp_source(const struct sctp_chunk *chunk);
 
+static inline __u16 sctp_chunk_stream_no(struct sctp_chunk *ch)
+{
+	return ntohs(ch->subh.data_hdr->stream);
+}
+
 enum {
 	SCTP_ADDR_NEW,		/* new address added to assoc/ep */
 	SCTP_ADDR_SRC,		/* address can be used as source */
-- 
2.13.5