[v2,15/31] kvm tools: Add helpers to return TCP {header, total, payload} length

Commit Message

Asias He June 30, 2011, 8:41 a.m. UTC

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 <[e-mail]>
---
 tools/kvm/include/kvm/uip.h |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

Patch

diff --git a/tools/kvm/include/kvm/uip.h b/tools/kvm/include/kvm/uip.h
index a772fdf..2ac48d7 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);