patch-2.4.0-test3 linux/include/net/inet_ecn.h

• Lines: 73
• Date: Sun Jul 9 22:30:40 2000
• Orig file: v2.4.0-test2/linux/include/net/inet_ecn.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/include/net/inet_ecn.h linux/include/net/inet_ecn.h
@@ -0,0 +1,72 @@
+#ifndef _INET_ECN_H_
+#define _INET_ECN_H_
+
+#include <linux/config.h>
+
+#ifdef CONFIG_INET_ECN
+
+static inline int INET_ECN_is_ce(__u8 dsfield)
+{
+	return (dsfield&3) == 3;
+}
+
+static inline int INET_ECN_is_not_ce(__u8 dsfield)
+{
+	return (dsfield&3) == 2;
+}
+
+static inline int INET_ECN_is_capable(__u8 dsfield)
+{
+	return (dsfield&2);
+}
+
+static inline __u8 INET_ECN_encapsulate(__u8 outer, __u8 inner)
+{
+	outer &= ~3;
+	if (INET_ECN_is_capable(inner))
+		outer |= (inner & 3);
+	return outer;
+}
+
+#define	INET_ECN_xmit(sk) do { (sk)->protinfo.af_inet.tos |= 2; } while (0)
+#define	INET_ECN_dontxmit(sk) do { (sk)->protinfo.af_inet.tos &= ~3; } while (0)
+
+#define IP6_ECN_flow_init(label) do {	\
+      (label) &= ~htonl(3<<20);		\
+    } while (0)
+
+#define	IP6_ECN_flow_xmit(sk, label) do {			\
+	if (INET_ECN_is_capable((sk)->protinfo.af_inet.tos))	\
+		(label) |= __constant_htons(2 << 4);		\
+    } while (0)
+
+
+#else
+#define INET_ECN_is_ce(x...)		(0)
+#define INET_ECN_is_not_ce(x...)	(0)
+#define INET_ECN_is_capable(x...)	(0)
+#define INET_ECN_encapsulate(x, y)	(x)
+#define IP6_ECN_flow_init(x...)		do { } while (0)
+#define	IP6_ECN_flow_xmit(x...)		do { } while (0)
+#define	INET_ECN_xmit(x...)		do { } while (0)
+#define	INET_ECN_dontxmit(x...)		do { } while (0)
+#endif
+
+static inline void IP_ECN_set_ce(struct iphdr *iph)
+{
+	u32 check = iph->check;
+	check += __constant_htons(0xFFFE);
+	iph->check = check + (check>=0xFFFF);
+	iph->tos |= 1;
+}
+
+struct ipv6hdr;
+
+static inline void IP6_ECN_set_ce(struct ipv6hdr *iph)
+{
+	*(u32*)iph |= htonl(1<<20);
+}
+
+#define ip6_get_dsfield(iph) ((ntohs(*(u16*)(iph)) >> 4) & 0xFF)
+
+#endif