conf: Use configuration file path from Makefile instead of hardcoded paths

Currently, the path to the configuration files is hardcoded to
$PREFIX/etc/netsniff-ng.

If we want to keep the configuration files outside of prefix (e.g.
during development), we need to pass the complete path as specified in
$ETCDIRE (and $ETCDIR respectively, which could e.g. be overriden on the
command line during build install) as a preprocessor define.

This way, we can e.g. install the configuration files to /etc while
installing the binaries in /usr/local with:

  $ make PREFIX=/usr/local ETCDIR=/etc
  $ make PREFIX=/usr/local ETCDIR=/etc install

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 3 insertions, 3 deletions

diff --git a/dissector_eth.c b/dissector_eth.c
index 3beff72..4a696c5 100644
--- a/dissector_eth.c
+++ b/dissector_eth.c
@@ -119,15 +119,15 @@ static void dissector_init_ports(enum ports which)
 
 	switch (which) {
 	case PORTS_UDP:
-		file = PREFIX_STRING "/etc/netsniff-ng/udp.conf";
+		file = ETCDIRE_STRING "/udp.conf";
 		table = &eth_ports_udp;
 		break;
 	case PORTS_TCP:
-		file = PREFIX_STRING "/etc/netsniff-ng/tcp.conf";
+		file = ETCDIRE_STRING "/tcp.conf";
 		table = &eth_ports_tcp;
 		break;
 	case PORTS_ETHER:
-		file = PREFIX_STRING "/etc/netsniff-ng/ether.conf";
+		file = ETCDIRE_STRING "/ether.conf";
 		table = &eth_ether_types;
 		break;
 	default: