make /etc/network parsing configurable. -200 bytes when off.

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);