Add metric to RouteEntry.

.gitmodules

@@ -1,3 +1,4 @@
 [submodule "googletest"]
 	path = googletest
     url = https://github.com/smarr/googletest.git
+    ignore = dirty

examples/CMakeLists.txt

@@ -30,9 +30,11 @@ IF(libtins_FOUND)
         ${LIBTINS_CXX11_EXAMPLES}
         beacon_display
         portscan
+        route_table
     )
 
     ADD_EXECUTABLE(arpspoofing EXCLUDE_FROM_ALL arpspoofing.cpp)
+    ADD_EXECUTABLE(route_table EXCLUDE_FROM_ALL route_table.cpp)
     IF(HAVE_CXX11)
         ADD_EXECUTABLE(arpmonitor EXCLUDE_FROM_ALL arpmonitor.cpp)
         ADD_EXECUTABLE(dns_queries EXCLUDE_FROM_ALL dns_queries.cpp)

examples/route_table.cpp

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2015, 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 <iostream>
+#include <iomanip>
+#include <vector>
+#include <tins/tins.h>
+
+using namespace std;
+using namespace Tins;
+
+int main() {
+	vector<Utils::RouteEntry> entries = Utils::route_entries();
+	for (size_t i = 0; i < entries.size(); ++i) {
+		cout << "Entry " << setw(2) << i << ": " << endl
+			 << "Interface:   " << entries[i].interface << endl
+			 << "Destination: " << entries[i].destination << endl
+			 << "Gateway:     " << entries[i].gateway << endl
+			 << "Genmask:     " << entries[i].mask << endl
+			 << "Metric:      " << entries[i].metric << endl << endl;
+	}
+}

include/tins/utils.h

@@ -94,6 +94,11 @@ namespace Tins {
              * This route entry's subnet mask.
              */
             IPv4Address mask;
+
+            /**
+             * This route entry's metric.
+             */
+            int metric;
         };
         
         /** 
@@ -371,6 +376,7 @@ void Tins::Utils::route_entries(ForwardIterator output) {
             else
                 entry.mask = IPv4Address(uint32_t());
             entry.interface = iface_name;
+            entry.metric = 0;
             *output++ = entry;
         }
         next += rtm->rtm_msglen;
@@ -388,12 +394,14 @@ void Tins::Utils::route_entries(ForwardIterator output) {
     
     for (DWORD i = 0; i < table->dwNumEntries; i++) {
         MIB_IPFORWARDROW *row = &table->table[i];
-        if(row->dwForwardType == MIB_IPROUTE_TYPE_INDIRECT) {
+        if(row->dwForwardType == MIB_IPROUTE_TYPE_INDIRECT || 
+                row->dwForwardType == MIB_IPROUTE_TYPE_DIRECT) {
             RouteEntry entry;
             entry.interface = NetworkInterface::from_index(row->dwForwardIfIndex).name();
             entry.destination = IPv4Address(row->dwForwardDest);
             entry.mask = IPv4Address(row->dwForwardMask);
             entry.gateway = IPv4Address(row->dwForwardNextHop);
+            entry.metric = row->dwForwardMetric1;
             *output++ = entry;
         }
     }
@@ -403,12 +411,13 @@ template<class ForwardIterator>
 void Tins::Utils::route_entries(ForwardIterator output) {
     using namespace Tins::Internals;
     std::ifstream input("/proc/net/route");
-    std::string destination, mask, gw;
+    std::string destination, mask, metric, gw;
     uint32_t dummy;
     skip_line(input);
     RouteEntry entry;
     while(input >> entry.interface >> destination >> gw) {
-        for(unsigned i(0); i < 5; ++i)
+        for(unsigned i(0); i < 4; ++i)
+            input >> metric;
         input >> mask;
         from_hex(destination, dummy);
         entry.destination = IPv4Address(dummy);
@@ -416,6 +425,8 @@ void Tins::Utils::route_entries(ForwardIterator output) {
         entry.mask = IPv4Address(dummy);
         from_hex(gw, dummy);
         entry.gateway = IPv4Address(dummy);
+        from_hex(metric, dummy);
+        entry.metric = dummy;
         skip_line(input);
         *output = entry;
         ++output;

src/network_interface.cpp

@@ -180,7 +180,7 @@ NetworkInterface::NetworkInterface(IPv4Address ip) : iface_id(0) {
         Utils::route_entries(std::back_inserter(entries));
         for(entries_type::const_iterator it(entries.begin()); it != entries.end(); ++it) {
             if((ip_int & it->mask) == it->destination) {
-                if(!best_match || it->mask > best_match->mask) {
+                if(!best_match || it->mask > best_match->mask || it->metric < best_match->metric) {
                     best_match = &*it;
                 }
             }