patch-2.1.8 linux/net/ipv6/protocol.c

• Lines: 113
• Date: Sun Nov 3 11:04:46 1996
• Orig file: v2.1.7/linux/net/ipv6/protocol.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.7/linux/net/ipv6/protocol.c linux/net/ipv6/protocol.c
@@ -0,0 +1,112 @@
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/sched.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+
+struct inet6_protocol *inet6_protocol_base = NULL;
+struct inet6_protocol *inet6_protos[MAX_INET_PROTOS] = 
+{
+	NULL
+};
+
+
+struct inet6_protocol *inet6_get_protocol(unsigned char prot)
+{
+	unsigned char hash;
+	struct inet6_protocol *p;
+
+	hash = prot & (MAX_INET_PROTOS - 1);
+	for (p = inet6_protos[hash] ; p != NULL; p=p->next) 
+	{
+		if (p->protocol == prot) 
+			return((struct inet6_protocol *) p);
+	}
+	return(NULL);
+}
+
+void inet6_add_protocol(struct inet6_protocol *prot)
+{
+	unsigned char hash;
+	struct inet6_protocol *p2;
+
+	hash = prot->protocol & (MAX_INET_PROTOS - 1);
+	prot ->next = inet6_protos[hash];
+	inet6_protos[hash] = prot;
+	prot->copy = 0;
+
+	/*
+	 *	Set the copy bit if we need to. 
+	 */
+	 
+	p2 = (struct inet6_protocol *) prot->next;
+	while(p2 != NULL) 
+	{
+		if (p2->protocol == prot->protocol) 
+		{
+			prot->copy = 1;
+			break;
+		}
+		p2 = (struct inet6_protocol *) p2->next;
+	}
+}
+
+/*
+ *	Remove a protocol from the hash tables.
+ */
+ 
+int inet6_del_protocol(struct inet6_protocol *prot)
+{
+	struct inet6_protocol *p;
+	struct inet6_protocol *lp = NULL;
+	unsigned char hash;
+
+	hash = prot->protocol & (MAX_INET_PROTOS - 1);
+	if (prot == inet6_protos[hash]) 
+	{
+		inet6_protos[hash] = (struct inet6_protocol *) inet6_protos[hash]->next;
+		return(0);
+	}
+
+	p = (struct inet6_protocol *) inet6_protos[hash];
+	while(p != NULL) 
+	{
+		/*
+		 * We have to worry if the protocol being deleted is
+		 * the last one on the list, then we may need to reset
+		 * someone's copied bit.
+		 */
+		if (p->next != NULL && p->next == prot) 
+		{
+			/*
+			 * if we are the last one with this protocol and
+			 * there is a previous one, reset its copy bit.
+			 */
+			if (p->copy == 0 && lp != NULL) 
+				lp->copy = 0;
+			p->next = prot->next;
+			return(0);
+		}
+		if (p->next != NULL && p->next->protocol == prot->protocol) 
+			lp = p;
+
+		p = (struct inet6_protocol *) p->next;
+	}
+	return(-1);
+}
+
+/*
+ * Local variables:
+ *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strength-reduce -pipe -m486 -DCPU=486 -DMODULE -DMODVERSIONS -include /usr/src/linux/include/linux/modversions.h  -c -o protocol.o protocol.c"
+ * End:
+ */