X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/45e7fd7235544cf7420a38cbfe425dca6c89e83b..67336957bf4ba9077e903c3d9fe3d098cac1602b:/usr/src/sys/net/if.c

diff --git a/usr/src/sys/net/if.c b/usr/src/sys/net/if.c
index a265280d30..2ead25f07d 100644
--- a/usr/src/sys/net/if.c
+++ b/usr/src/sys/net/if.c
@@ -2,19 +2,9 @@
  * Copyright (c) 1980, 1986 Regents of the University of California.
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * %sccs.include.redist.c%
  *
- *	@(#)if.c	7.6.1.1 (Berkeley) %G%
+ *	@(#)if.c	7.13 (Berkeley) %G%
  */
 
 #include "param.h"
@@ -23,7 +13,6 @@
 #include "socket.h"
 #include "socketvar.h"
 #include "protosw.h"
-#include "dir.h"
 #include "user.h"
 #include "kernel.h"
 #include "ioctl.h"
@@ -31,6 +20,8 @@
 
 #include "if.h"
 #include "af.h"
+#include "if_dl.h"
+#include "if_types.h"
 
 #include "ether.h"
 
@@ -68,6 +59,8 @@ ifubareset(uban)
 }
 #endif
 
+int if_index = 0;
+struct ifaddr **ifnet_addrs;
 /*
  * Attach an interface to the
  * list of "active" interfaces.
@@ -75,13 +68,72 @@ ifubareset(uban)
 if_attach(ifp)
 	struct ifnet *ifp;
 {
+	unsigned socksize, ifasize;
+	int namelen, unitlen;
+	char workbuf[16];
 	register struct ifnet **p = &ifnet;
+	register struct sockaddr_dl *sdl;
+	register struct ifaddr *ifa;
+	static int if_indexlim = 8;
+	extern link_rtrequest(), ether_output();
 
 	while (*p)
 		p = &((*p)->if_next);
 	*p = ifp;
+	ifp->if_index = ++if_index;
+	if (ifnet_addrs == 0 || if_index >= if_indexlim) {
+		unsigned n = (if_indexlim <<= 1) * sizeof(ifa);
+		struct ifaddr **q = (struct ifaddr **)
+					malloc(n, M_IFADDR, M_WAITOK);
+		if (ifnet_addrs) {
+			bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
+			free((caddr_t)ifnet_addrs, M_IFADDR);
+		}
+		ifnet_addrs = q;
+	}
+	/* XXX -- Temporary fix before changing 10 ethernet drivers */
+	if (ifp->if_output == ether_output) {
+		ifp->if_type = IFT_ETHER;
+		ifp->if_addrlen = 6;
+		ifp->if_hdrlen = 14;
+	}
+	/*
+	 * create a Link Level name for this device
+	 */
+	sprint_d(workbuf, ifp->if_unit);
+	namelen = strlen(ifp->if_name);
+	unitlen = strlen(workbuf);
+#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
+	socksize = _offsetof(struct sockaddr_dl, sdl_data[0]) +
+			       unitlen + namelen + ifp->if_addrlen;
+#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
+	socksize = ROUNDUP(socksize);
+	if (socksize < sizeof(*sdl))
+		socksize = sizeof(*sdl);
+	ifasize = sizeof(*ifa) + 2 * socksize;
+	ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
+	if (ifa == 0)
+		return;
+	ifnet_addrs[if_index - 1] = ifa;
+	bzero((caddr_t)ifa, ifasize);
+	sdl = (struct sockaddr_dl *)(ifa + 1);
+	ifa->ifa_addr = (struct sockaddr *)sdl;
+	ifa->ifa_ifp = ifp;
+	sdl->sdl_len = socksize;
+	sdl->sdl_family = AF_LINK;
+	bcopy(ifp->if_name, sdl->sdl_data, namelen);
+	bcopy((caddr_t)workbuf, namelen + (caddr_t)sdl->sdl_data, unitlen);
+	sdl->sdl_nlen = (namelen += unitlen);
+	sdl->sdl_index = ifp->if_index;
+	sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
+	ifa->ifa_netmask = (struct sockaddr *)sdl;
+	sdl->sdl_len = socksize - ifp->if_addrlen;
+	while (namelen != 0)
+		sdl->sdl_data[--namelen] = 0xff;
+	ifa->ifa_next = ifp->if_addrlist;
+	ifa->ifa_rtrequest = link_rtrequest;
+	ifp->if_addrlist = ifa;
 }
-
 /*
  * Locate an interface based on a complete address.
  */
@@ -101,8 +153,8 @@ ifa_ifwithaddr(addr)
 			continue;
 		if (equal(addr, ifa->ifa_addr))
 			return (ifa);
-		if ((ifp->if_flags & IFF_BROADCAST) &&
-		    equal(&ifa->ifa_broadaddr, addr))
+		if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
+		    equal(ifa->ifa_broadaddr, addr))
 			return (ifa);
 	}
 	return ((struct ifaddr *)0);
@@ -139,14 +191,19 @@ ifa_ifwithnet(addr)
 {
 	register struct ifnet *ifp;
 	register struct ifaddr *ifa;
-	register char *cp, *cp2, *cp3;
-	register char *cplim;
 	u_int af = addr->sa_family;
 
 	if (af >= AF_MAX)
 		return (0);
+	if (af == AF_LINK) {
+	    register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
+	    if (sdl->sdl_index && sdl->sdl_index <= if_index)
+		return (ifnet_addrs[sdl->sdl_index - 1]);
+	}
 	for (ifp = ifnet; ifp; ifp = ifp->if_next)
 	    for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+		register char *cp, *cp2, *cp3;
+		register char *cplim;
 		if (ifa->ifa_addr->sa_family != af || ifa->ifa_netmask == 0)
 			continue;
 		cp = addr->sa_data;
@@ -162,7 +219,6 @@ ifa_ifwithnet(addr)
 	return ((struct ifaddr *)0);
 }
 
-#ifdef notdef
 /*
  * Find an interface using a specific address family
  */
@@ -179,7 +235,69 @@ ifa_ifwithaf(af)
 			return (ifa);
 	return ((struct ifaddr *)0);
 }
-#endif
+
+/*
+ * Find an interface address specific to an interface best matching
+ * a given address.
+ */
+struct ifaddr *
+ifaof_ifpforaddr(addr, ifp)
+	struct sockaddr *addr;
+	register struct ifnet *ifp;
+{
+	register struct ifaddr *ifa;
+	register char *cp, *cp2, *cp3;
+	register char *cplim;
+	struct ifaddr *ifa_maybe = 0;
+	u_int af = addr->sa_family;
+
+	if (af >= AF_MAX)
+		return (0);
+	for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+		if (ifa->ifa_addr->sa_family != af)
+			continue;
+		ifa_maybe = ifa;
+		if (ifa->ifa_netmask == 0) {
+			if (equal(addr, ifa->ifa_addr) ||
+			    (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
+				return (ifa);
+			continue;
+		}
+		cp = addr->sa_data;
+		cp2 = ifa->ifa_addr->sa_data;
+		cp3 = ifa->ifa_netmask->sa_data;
+		cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
+		for (; cp3 < cplim; cp3++)
+			if ((*cp++ ^ *cp2++) & *cp3)
+				break;
+		if (cp3 == cplim)
+			return (ifa);
+	}
+	return (ifa_maybe);
+}
+#include "route.h"
+/*
+ * Default action when installing a route with a Link Level gateway.
+ * Lookup an appropriate real ifa to point to.
+ * This should be moved to /sys/net/link.c eventually.
+ */
+link_rtrequest(cmd, rt, sa)
+register struct rtentry *rt;
+struct sockaddr *sa;
+{
+	register struct ifaddr *ifa;
+	struct sockaddr *dst;
+	struct ifnet *ifp, *oldifnet = ifnet;
+
+	if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
+	    ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
+		return;
+	if (ifa = ifaof_ifpforaddr(dst, ifp)) {
+		rt->rt_ifa = ifa;
+		if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
+			ifa->ifa_rtrequest(cmd, rt, sa);
+	}
+}
 
 /*
  * Mark an interface down and notify protocols of
@@ -285,6 +403,7 @@ ifioctl(so, cmd, data)
 {
 	register struct ifnet *ifp;
 	register struct ifreq *ifr;
+	int error;
 
 	switch (cmd) {
 
@@ -295,8 +414,8 @@ ifioctl(so, cmd, data)
 #if defined(INET) && NETHER > 0
 	case SIOCSARP:
 	case SIOCDARP:
-		if (!suser())
-			return (u.u_error);
+		if (error = suser(u.u_cred, &u.u_acflag))
+			return (error);
 		/* FALL THROUGH */
 	case SIOCGARP:
 	case OSIOCGARP:
@@ -318,8 +437,8 @@ ifioctl(so, cmd, data)
 		break;
 
 	case SIOCSIFFLAGS:
-		if (!suser())
-			return (u.u_error);
+		if (error = suser(u.u_cred, &u.u_acflag))
+			return (error);
 		if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
 			int s = splimp();
 			if_down(ifp);
@@ -332,8 +451,8 @@ ifioctl(so, cmd, data)
 		break;
 
 	case SIOCSIFMETRIC:
-		if (!suser())
-			return (u.u_error);
+		if (error = suser(u.u_cred, &u.u_acflag))
+			return (error);
 		ifp->if_metric = ifr->ifr_metric;
 		break;
 
@@ -345,7 +464,7 @@ ifioctl(so, cmd, data)
 			cmd, data, ifp));
 #else
 	    {
-		int error, ocmd = cmd;
+		int ocmd = cmd;
 
 		switch (cmd) {
 
@@ -468,3 +587,22 @@ ifconf(cmd, data)
 	ifc->ifc_len -= space;
 	return (error);
 }
+
+static sprint_d(cp, n)
+register char *cp;
+u_short n;
+{
+	register int q, m;
+	do {
+	    if (n >= 10000) m = 10000;
+		else if (n >= 1000) m = 1000;
+		else if (n >= 100) m = 100;
+		else if (n >= 10) m = 10;
+		else m = 1;
+	    q = n / m;
+	    n -= m * q;
+	    if (q > 9) q = 10; /* For crays with more than 100K interfaces */
+	    *cp++ = "0123456789Z"[q];
+	} while (n > 0);
+	*cp++ = 0;
+}