Move frequency (channel) utils into their own file

src/CMakeLists.txt

@@ -73,6 +73,7 @@ set(SOURCES
     dot11/dot11_probe.cpp
     dot11/dot11_control.cpp
     utils/checksum_utils.cpp
+    utils/frequency_utils.cpp
 )
 
 SET(PCAP_DEPENDENT_SOURCES

src/radiotap.cpp

@@ -44,11 +44,11 @@
     #include <net/ethernet.h>
 #endif
 #include "dot11/dot11_base.h"
-#include "utils.h"
 #include "packet_sender.h"
 #include "exceptions.h"
 #include "memory_helpers.h"
 #include "utils/checksum_utils.h"
+#include "utils/frequency_utils.h"
 
 using std::memcpy;
 

src/utils.cpp

@@ -524,14 +524,6 @@ set<string> network_interfaces() {
     return output;
 }
 #endif // _WIN32
-
-uint16_t channel_to_mhz(uint16_t channel) {
-    return 2407 + (channel * 5);
-}
-
-uint16_t mhz_to_channel(uint16_t mhz) {
-    return (mhz - 2407) / 5;
-}
     
 string to_string(PDU::PDUType pduType) {
 #define ENUM_TEXT(p) case(PDU::p): return #p;

src/utils/frequency_utils.cpp

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017, Matias Fontanini
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following disclaimer
+ *   in the documentation and/or other materials provided with the
+ *   distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "utils/frequency_utils.h"
+
+namespace Tins {
+namespace Utils {
+
+uint16_t channel_to_mhz(uint16_t channel) {
+    return 2407 + (channel * 5);
+}
+
+uint16_t mhz_to_channel(uint16_t mhz) {
+    return (mhz - 2407) / 5;
+}
+
+} // Utils
+} // Tins