X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/f1b2fa5b8a62e80603e6c83b87eaf0b06db3818e..39674d5f4e66e750df77c36159b66e1554511bb5:/usr/src/sys/net/if.c

diff --git a/usr/src/sys/net/if.c b/usr/src/sys/net/if.c
index 1cd6adb347..ee6ef4f778 100644
--- a/usr/src/sys/net/if.c
+++ b/usr/src/sys/net/if.c
@@ -1,51 +1,155 @@
-/*	if.c	4.4	81/11/29	*/
+/*	if.c	4.14	82/04/24	*/
 
 #include "../h/param.h"
 #include "../h/systm.h"
+#include "../h/socket.h"
+#include "../h/protosw.h"
 #include "../net/in.h"
 #include "../net/in_systm.h"
 #include "../net/if.h"
+#include "../net/af.h"
 
+int	ifqmaxlen = IFQ_MAXLEN;
+
+/*
+ * Network interface utility routines.
+ *
+ * Routines with if_ifwith* names take sockaddr *'s as
+ * parameters.  Other routines take value parameters,
+ * e.g. if_ifwithnet takes the network number.
+ */
+
+ifinit()
+{
+	register struct ifnet *ifp;
+
+	for (ifp = ifnet; ifp; ifp = ifp->if_next)
+		if (ifp->if_init) {
+			(*ifp->if_init)(ifp->if_unit);
+			if (ifp->if_snd.ifq_maxlen == 0)
+				ifp->if_snd.ifq_maxlen = ifqmaxlen;
+		}
+}
+
+/*
+ * Call each interface on a Unibus reset.
+ */
+ifubareset(uban)
+	int uban;
+{
+	register struct ifnet *ifp;
+
+	for (ifp = ifnet; ifp; ifp = ifp->if_next)
+		if (ifp->if_ubareset)
+			(*ifp->if_ubareset)(uban);
+}
+
+/*
+ * Attach an interface to the
+ * list of "active" interfaces.
+ */
+if_attach(ifp)
+	struct ifnet *ifp;
+{
+	register struct ifnet **p = &ifnet;
+
+COUNT(IF_ATTACH);
+	while (*p)
+		p = &((*p)->if_next);
+	*p = ifp;
+}
+
+/*
+ * Locate an interface based on a complete address.
+ */
 /*ARGSUSED*/
 struct ifnet *
-if_ifwithaddr(in)
-	struct in_addr in;
+if_ifwithaddr(addr)
+	struct sockaddr *addr;
 {
 	register struct ifnet *ifp;
 
 COUNT(IF_IFWITHADDR);
-	for (ifp = ifnet; ifp; ifp = ifp->if_next)
-		if (ifp->if_addr.s_addr == in.s_addr)
+#define	equal(a1, a2) \
+	(bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 14) == 0)
+	for (ifp = ifnet; ifp; ifp = ifp->if_next) {
+		if (ifp->if_addr.sa_family != addr->sa_family)
+			continue;
+		if (equal(&ifp->if_addr, addr))
+			break;
+		if ((ifp->if_flags & IFF_BROADCAST) &&
+		    equal(&ifp->if_broadaddr, addr))
 			break;
+	}
 	return (ifp);
 }
 
-/*ARGSUSED*/
+/*
+ * Find an interface on a specific network.  If many, choice
+ * is first found.
+ */
 struct ifnet *
-if_ifonnetof(in)
-	struct in_addr in;
+if_ifwithnet(addr)
+	register struct sockaddr *addr;
+{
+	register struct ifnet *ifp;
+	register int af = addr->sa_family;
+	register int (*netmatch)() = afswitch[af].af_netmatch;
+
+	for (ifp = ifnet; ifp; ifp = ifp->if_next) {
+		if (af != ifp->if_addr.sa_family)
+			continue;
+		if ((*netmatch)(addr, &ifp->if_addr))
+			break;
+	}
+	return (ifp);
+}
+
+/*
+ * As above, but parameter is network number.
+ */
+struct ifnet *
+if_ifonnetof(net)
+	register int net;
 {
 	register struct ifnet *ifp;
-	int net;
 
-COUNT(IF_IFONNETOF);
-	net = in.s_net;			/* XXX */
 	for (ifp = ifnet; ifp; ifp = ifp->if_next)
 		if (ifp->if_net == net)
 			break;
 	return (ifp);
 }
 
-/*ARGSUSED*/
+/*
+ * Find an interface using a specific address family
+ */
 struct ifnet *
-if_gatewayfor(addr)
-	struct in_addr addr;
+if_ifwithaf(af)
+	register int af;
 {
+	register struct ifnet *ifp;
 
-COUNT(IF_GATEWAYFOR);
-	return (0);
+	for (ifp = ifnet; ifp; ifp = ifp->if_next)
+		if (ifp->if_addr.sa_family == af)
+			break;
+	return (ifp);
+}
+
+/*
+ * Mark an interface down and notify protocols of
+ * the transition.
+ */
+if_down(ifp)
+	register struct ifnet *ifp;
+{
+	ifp->if_flags &= ~IFF_UP;
+	pfctlinput(PRC_IFDOWN, (caddr_t)&ifp->if_addr);
 }
 
+/*
+ * Formulate an Internet address from network + host.  Used in
+ * building addresses stored in the ifnet structure.
+ */
 struct in_addr
 if_makeaddr(net, host)
 	int net, host;
@@ -53,11 +157,32 @@ if_makeaddr(net, host)
 	u_long addr;
 
 	if (net < 128)
-		addr = (host << 8) | net;
+		addr = (net << 24) | host;
 	else if (net < 65536)
-		addr = (host << 16) | net;
+		addr = (net << 16) | host;
 	else
-		addr = (host << 24) | net;
+		addr = (net << 8) | host;
+#ifdef vax
 	addr = htonl(addr);
+#endif
 	return (*(struct in_addr *)&addr);
 }
+
+/*
+ * Initialize an interface's routing
+ * table entry according to the network.
+ * INTERNET SPECIFIC.
+ */
+if_rtinit(ifp, flags)
+	register struct ifnet *ifp;
+	int flags;
+{
+	struct sockaddr_in sin;
+
+	if (ifp->if_flags & IFF_ROUTE)
+		return;
+	bzero((caddr_t)&sin, sizeof (sin));
+	sin.sin_family = AF_INET;
+	sin.sin_addr = if_makeaddr(ifp->if_net, 0);
+	rtinit(&sin, &ifp->if_addr, flags);
+}