C++: variable 'ns3::Ipv4RoutingTableEntry route' has initializer but incomplete type
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28-04-2021 - |
質問
I am having trouble deciphering these error messages from g++
../upenn-cis553/ls-routing-protocol/ls-routing-protocol.cc:533:29: error: variable ‘ns3::Ipv4RoutingTableEntry route’ has initializer but incomplete type
../upenn-cis553/ls-routing-protocol/ls-routing-protocol.cc:533:64: error: invalid use of incomplete type ‘struct ns3::Ipv4RoutingTableEntry’
Here is my ls-routing-protocol.h file:
#include "ns3/ipv4.h"
#include "ns3/ipv4-routing-protocol.h"
#include "ns3/ipv4-static-routing.h"
#include "ns3/object.h"
#include "ns3/packet.h"
#include "ns3/node.h"
#include "ns3/socket.h"
#include "ns3/timer.h"
#include "ns3/ping-request.h"
#include "ns3/penn-routing-protocol.h"
#include "ns3/ls-message.h"
#include <vector>
#include <map>
...
private:
...
Ptr<Ipv4StaticRouting> m_staticRouting;
...
And here the relevant snippet from the ls-routing-protocol.cc file:
#include "ns3/ls-routing-protocol.h"
#include "ns3/socket-factory.h"
#include "ns3/udp-socket-factory.h"
#include "ns3/simulator.h"
#include "ns3/log.h"
#include "ns3/random-variable.h"
#include "ns3/inet-socket-address.h"
#include "ns3/ipv4-header.h"
#include "ns3/ipv4-route.h"
#include "ns3/uinteger.h"
#include "ns3/test-result.h"
#include <sys/time.h>
using namespace ns3;
void
LSRoutingProtocol::AuditRoutes ()
{
int i;
int n = m_staticRouting->GetNRoutes();
for (i=0; i < n; i++)
{
Ipv4RoutingTableEntry route = m_staticRouting->GetRoute(i); // ERROR
...
}
...
}
As some of you may tell, I am working with ns-3. I have looked up my error in many places, and most of the advice has been to properly declare a few structs. However, we are not directly using structs in this code (or at least not that I know of). I am starting to think that it's an issue with our use of smart pointers, but I'm not really sure.
Also, in case it is of any help: documentation for ipv4_static_routing.h
解決
You need to #include <ipv4-routing-table-entry.h>
. This is the first thing that you see when you look at the documentation of ns3::Ipv4RoutingTableEntry
class.