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ip/ipconfig: setup per local address default routes

--- a/sys/src/cmd/ip/ipconfig/ipv6.c

+++ b/sys/src/cmd/ip/ipconfig/ipv6.c

@@ -548,6 +548,7 @@

 recvrahost(uchar buf[], int pktlen)

 {

 	int m, n, optype;

+	uchar src[IPaddrlen];

 	Lladdropt *llao;

 	Mtuopt *mtuo;

 	Prefixopt *prfo;

@@ -616,6 +617,7 @@

 			conf.validlt = nhgetl(prfo->validlt);

 			conf.preflt =  nhgetl(prfo->preflt);

 			issueadd6(&conf);

+			

 			if(conf.routerlt == 0)

 				break;

 			if((prfo->lar & RFMASK) != 0)

@@ -622,7 +624,10 @@

 				ipmove(conf.gaddr, prfo->pref);

 			else

 				ipmove(conf.gaddr, ra->src);

-			adddefroute(conf.gaddr, conf.laddr, conf.v6pref, conf.mask);

+

+			memmove(src, conf.v6pref, 8);

+			memmove(src+8, conf.laddr+8, 8);

+			adddefroute(conf.gaddr, conf.laddr, src, conf.mask);

 			break;

 		}

 	}

--- a/sys/src/cmd/ip/ipconfig/main.c

+++ b/sys/src/cmd/ip/ipconfig/main.c

@@ -737,6 +737,10 @@

 			smask = IPnoaddr;

 	}

 	addroute(dst, mask, gaddr, laddr, src, smask);

+

+	/* also add a source specific route */

+	if(ipcmp(src, IPnoaddr) != 0 && ipcmp(src, v4prefix) != 0)

+		addroute(dst, mask, gaddr, laddr, src, IPallbits);

 }