From a61cb92f2d1d9a7862813f37e3e3229e27ad21de Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Tue, 19 Jun 2007 11:24:47 +0000
Subject: [PATCH] make /etc/network parsing configurable. -200 bytes when off.

---
 libbb/Config.in     | 8 ++++++++
 libbb/inet_common.c | 9 +++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/libbb/Config.in b/libbb/Config.in
index 0a3769df2..5f4e416dd 100644
--- a/libbb/Config.in
+++ b/libbb/Config.in
@@ -26,6 +26,14 @@ config MD5_SIZE_VS_SPEED
 	  2                   3.0                5088
 	  3 (smallest)        5.1                4912
 
+config FEATURE_ETC_NETWORKS
+	bool "Support for /etc/networks"
+	default n
+	help
+	  Enable support for network names in /etc/networks. This is
+	  a rarely used feature which allows you to use names
+	  instead of IP/mask pairs in route command.
+
 config FEATURE_EDITING
 	bool "Command line editing"
 	default n
diff --git a/libbb/inet_common.c b/libbb/inet_common.c
index 8449201ab..ec3c3f9bb 100644
--- a/libbb/inet_common.c
+++ b/libbb/inet_common.c
@@ -14,7 +14,9 @@
 int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
 {
 	struct hostent *hp;
+#if ENABLE_FEATURE_ETC_NETWORKS
 	struct netent *np;
+#endif
 
 	/* Grmpf. -FvK */
 	s_in->sin_family = AF_INET;
@@ -43,6 +45,7 @@ int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
 			return 0;
 		}
 	}
+#if ENABLE_FEATURE_ETC_NETWORKS
 	/* Try the NETWORKS database to see if this is a known network. */
 #ifdef DEBUG
 	bb_error_msg("getnetbyname(%s)", name);
@@ -52,6 +55,7 @@ int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
 		s_in->sin_addr.s_addr = htonl(np->n_net);
 		return 1;
 	}
+#endif
 	if (hostfirst) {
 		/* Don't try again */
 		return -1;
@@ -140,10 +144,7 @@ char *INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t netmask)
 		ent = gethostbyaddr((char *) &ad, 4, AF_INET);
 		if (ent)
 			name = xstrdup(ent->h_name);
-	} else {
-		/* Hmmm... this is very rare to have named nets,
-		 * and this getnetbyaddr() call is the only one in bbox.
-		 * Maybe get rid of or make configurable? */
+	} else if (ENABLE_FEATURE_ETC_NETWORKS) {
 		struct netent *np;
 #ifdef DEBUG
 		bb_error_msg("getnetbyaddr (%08x)", (unsigned)host_ad);