From: Asias He <asias.hejun@gmail.com>
Date: Wed, 29 Jun 2011 08:47:20 +0000 (+0800)
Subject: kvm tools: Add helpers to return TCP {header, total, payload} length
X-Git-Tag: next-20110824~3^2~172
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cacbd4b499fd667dc8c1e4f51582c83d7034294d;p=karo-tx-linux.git

kvm tools: Add helpers to return TCP {header, total, payload} length

This patch adds three helpers uip_tcp_hdrlen(), uip_tcp_len(),
uip_tcp_payloadlen() to return TCP header length, TCP totoal
length, and tcp payload length.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

diff --git a/tools/kvm/include/kvm/uip.h b/tools/kvm/include/kvm/uip.h
index a772fdfa00aa..2ac48d7eb6f3 100644
--- a/tools/kvm/include/kvm/uip.h
+++ b/tools/kvm/include/kvm/uip.h
@@ -203,6 +203,25 @@ static inline u16 uip_udp_len(struct uip_udp *udp)
 	return ntohs(udp->len);
 }
 
+static inline u16 uip_tcp_hdrlen(struct uip_tcp *tcp)
+{
+	return (tcp->off >> 4) * 4;
+}
+
+static inline u16 uip_tcp_len(struct uip_tcp *tcp)
+{
+	struct uip_ip *ip;
+
+	ip = &tcp->ip;
+
+	return uip_ip_len(ip) - uip_ip_hdrlen(ip);
+}
+
+static inline u16 uip_tcp_payloadlen(struct uip_tcp *tcp)
+{
+	return uip_tcp_len(tcp) - uip_tcp_hdrlen(tcp);
+}
+
 static inline u16 uip_eth_hdrlen(struct uip_eth *eth)
 {
 	return sizeof(*eth);