dns: discover my ip address at runtime

1 files changed, 9 insertions, 1 deletions

diff --git a/sys/src/cmd/ndb/dblookup.c b/sys/src/cmd/ndb/dblookup.c
index fa7b92627..a704983c4 100644
--- a/sys/src/cmd/ndb/dblookup.c
+++ b/sys/src/cmd/ndb/dblookup.c
@@ -761,7 +761,8 @@ dnforceage(void)
 	unlock(&dblock);
 }
 
-extern uchar	ipaddr[IPaddrlen];	/* my ip address */
+extern char	mntpt[Maxpath];		/* net mountpoint */
+static uchar	ipaddr[IPaddrlen];	/* my ip address */
 
 /*
  *  get all my xxx
@@ -774,6 +775,10 @@ lookupinfo(char *attr)
 	char *a[2];
 	Ndbtuple *t;
 
+	if(ipcmp(ipaddr, IPnoaddr) == 0)
+		if(myipaddr(ipaddr, mntpt) < 0)
+			return nil;
+
 	snprint(buf, sizeof buf, "%I", ipaddr);
 	a[0] = attr;
 
@@ -843,6 +848,9 @@ myaddr(char *addr)
 	char buf[64];
 	Biobuf *bp;
 
+	if(ipcmp(ipaddr, IPnoaddr) == 0)
+		return -1;
+
 	snprint(buf, sizeof buf, "%I", ipaddr);
 	if (strcmp(addr, buf) == 0) {
 		dnslog("rejecting my ip %s as local dns server", addr);