Patchwork [3/8] net: introduce proto_ports_offset()

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Submitter Changli Gao
Date Aug. 18, 2010, 5:03 a.m.
Message ID <1282107824-3507-1-git-send-email-xiaosuo@gmail.com>
Download mbox | patch
Permalink /patch/61991/
State Accepted
Delegated to: David Miller
Headers show

Comments

Changli Gao - Aug. 18, 2010, 5:03 a.m.
Introduce proto_ports_offset() for getting the position of the ports or
SPI in the message of a protocol.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
---
 include/linux/in.h |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
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David Miller - Aug. 20, 2010, 12:16 a.m.
From: Changli Gao <xiaosuo@gmail.com>
Date: Wed, 18 Aug 2010 13:03:44 +0800

> Introduce proto_ports_offset() for getting the position of the ports or
> SPI in the message of a protocol.
> 
> Signed-off-by: Changli Gao <xiaosuo@gmail.com>

Applied.
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Patch

diff --git a/include/linux/in.h b/include/linux/in.h
index 41d88a4..beeb6de 100644
--- a/include/linux/in.h
+++ b/include/linux/in.h
@@ -250,6 +250,25 @@  struct sockaddr_in {
 
 #ifdef __KERNEL__
 
+#include <linux/errno.h>
+
+static inline int proto_ports_offset(int proto)
+{
+	switch (proto) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+	case IPPROTO_DCCP:
+	case IPPROTO_ESP:	/* SPI */
+	case IPPROTO_SCTP:
+	case IPPROTO_UDPLITE:
+		return 0;
+	case IPPROTO_AH:	/* SPI */
+		return 4;
+	default:
+		return -EINVAL;
+	}
+}
+
 static inline bool ipv4_is_loopback(__be32 addr)
 {
 	return (addr & htonl(0xff000000)) == htonl(0x7f000000);