Merge pull request #6 from ates/pfring

PF_RING support

README.md

@@ -60,6 +60,17 @@ epcap includes a small example program called sniff.
         The Packet is a binary holding the captured data.
 
 
+## PF_RING
+
+        In case you want to compile epcap with PF_RING support,
+        just specify the path to the libpfring and modified libpcap libraries
+        via shell variable PFRING.
+
+            PFRING=/home/user/pfring make
+
+        As a result epcap binary will be linked with the following flags: -static -lpfring -lpthread
+
+
 ## SCREENSHOT
 
     =INFO REPORT==== 6-Jan-2010::20:35:18 ===

rebar.config

@@ -2,10 +2,12 @@
     {"EXE_LDFLAGS", "-lpcap $ERL_LDFLAGS"},
     {"linux", "EXE_CFLAGS", "$EXE_CFLAGS -DEPCAP_RLIMIT_NOFILES=1"},
     {"solaris", "EXE_CFLAGS", "$EXE_CFLAGS -DEPCAP_RLIMIT_NOFILES=1"}
-    ]}.
+]}.
+
 {port_specs, [
     {"priv/epcap", ["c_src/epcap.c", "c_src/epcap_priv.c"]}
-    ]}.
+]}.
+
 {deps, [
     {pkt, ".*", {git, "https://github.com/msantos/pkt.git", "master"}}
-    ]}.
+]}.

rebar.config.script

@@ -0,0 +1,17 @@
+case os:getenv("PFRING") of
+    false ->
+        CONFIG;
+    Value ->
+        case filelib:is_dir(Value) of
+            true ->
+                case lists:keysearch(port_env, 1, CONFIG) of
+                    {value, {port_env, Flags}} ->
+                        {"EXE_LDFLAGS", LDFLAGS} = hd(Flags),
+                        NewFlags = LDFLAGS ++ " -static -L " ++ Value ++ " -lpfring -lpthread",
+                        NewLDFLAGS = lists:keyreplace("EXE_LDFLAGS", 1, Flags, {"EXE_LDFLAGS", NewFlags}),
+                        lists:keyreplace(port_env, 1, CONFIG, {port_env, NewLDFLAGS});
+                    _ -> CONFIG
+                end;
+            _ -> CONFIG
+        end
+end.