allow cs to lookup mac/ip/ip6 addresses for us.

Notes:
Tue Aug 21 15:39:40 EDT 2007 geoff
    Under consideration.


Reference: /n/sources/patch/applied/snoopy-ndb
Date: Thu Aug 16 17:50:02 CES 2007
Signed-off-by: quanstro@quanstro.net
Reviewed-by: geoff

--- /sys/src/cmd/ip/snoopy/main.c	Thu Aug 16 17:45:43 2007
+++ /sys/src/cmd/ip/snoopy/main.c	Thu Aug 16 17:50:30 2007
@@ -4,6 +4,7 @@
 #include <bio.h>
 #include <fcall.h>
 #include <libsec.h>
+#include <ndb.h>
 #include "dat.h"
 #include "protos.h"
 #include "y.tab.h"
@@ -735,6 +736,7 @@
 compile_cmp(char *proto, Filter *f, Field *fld)
 {
 	uchar x[IPaddrlen];
+	char *v;
 
 	if(f->op != '=')
 		sysfatal("internal error: compile_cmp %s: not a cmp", proto);
@@ -748,13 +750,28 @@
 				f->ulv = atoi(f->r->s);
 				break;
 			case Fether:
-				parseether(f->a, f->r->s);
+				v = csgetvalue(nil, "sys", (char*)f->r->s, "ether", 0);
+				if(v){
+					parseether(f->a, v);
+					free(v);
+				} else
+					parseether(f->a, f->r->s);
 				break;
 			case Fv4ip:
-				f->ulv = parseip(x, f->r->s);
+				v = csgetvalue(nil, "sys", (char*)f->r->s, "ip", 0);
+				if(v){
+					f->ulv = parseip(x, v);
+					free(v);
+				}else
+					f->ulv = parseip(x, f->r->s);
 				break;
 			case Fv6ip:
-				parseip(f->a, f->r->s);
+				v = csgetvalue(nil, "sys", (char*)f->r->s, "ip6", 0);
+				if(v){
+					parseip(f->a, v);
+					free(v);
+				}else
+					parseip(f->a, f->r->s);
 				break;
 			case Fba:
 				parseba(f->a, f->r->s);