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authorpeterbell10 <peterbell10@live.co.uk>2017-06-15 11:03:49 +0200
committerLukas Pioch <lukas@zgow.de>2017-06-15 11:03:49 +0200
commit035ecdc9e285ad2fd9ccf51e4ed2ac01b53dc3d1 (patch)
treeb6caede9a35093d3e59c57c8c8c7295dc1c8fbaf /src/OSSupport/IPLookup.cpp
parentAdded missing 1.12 packet changes (diff)
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Diffstat (limited to '')
-rw-r--r--src/OSSupport/IPLookup.cpp91
1 files changed, 38 insertions, 53 deletions
diff --git a/src/OSSupport/IPLookup.cpp b/src/OSSupport/IPLookup.cpp
index 2722d4722..7b543793d 100644
--- a/src/OSSupport/IPLookup.cpp
+++ b/src/OSSupport/IPLookup.cpp
@@ -5,8 +5,9 @@
#include "Globals.h"
#include "IPLookup.h"
-#include <event2/dns.h>
+#include <event2/util.h>
#include "NetworkSingleton.h"
+#include "GetAddressInfoError.h"
@@ -15,8 +16,9 @@
////////////////////////////////////////////////////////////////////////////////
// cIPLookup:
-cIPLookup::cIPLookup(cNetwork::cResolveNameCallbacksPtr a_Callbacks):
- m_Callbacks(a_Callbacks)
+cIPLookup::cIPLookup(const AString & a_IP, cNetwork::cResolveNameCallbacksPtr a_Callbacks):
+ m_Callbacks(a_Callbacks),
+ m_IP(a_IP)
{
ASSERT(a_Callbacks != nullptr);
}
@@ -25,68 +27,58 @@ cIPLookup::cIPLookup(cNetwork::cResolveNameCallbacksPtr a_Callbacks):
-bool cIPLookup::Lookup(const AString & a_IP)
+void cIPLookup::Lookup(const AString & a_IP, cNetwork::cResolveNameCallbacksPtr a_Callbacks)
{
- // Parse the IP address string into a sockaddr structure:
- m_IP = a_IP;
- sockaddr_storage sa;
- int salen = static_cast<int>(sizeof(sa));
- memset(&sa, 0, sizeof(sa));
- if (evutil_parse_sockaddr_port(a_IP.c_str(), reinterpret_cast<sockaddr *>(&sa), &salen) != 0)
- {
- LOGD("Failed to parse IP address \"%s\".", a_IP.c_str());
- return false;
- }
+ cIPLookupPtr Lookup{ new cIPLookup(a_IP, std::move(a_Callbacks)) }; // Cannot use std::make_shared here, constructor is not accessible
- // Call the proper resolver based on the address family:
- // Note that there's no need to store the evdns_request handle returned, LibEvent frees it on its own.
- switch (sa.ss_family)
+ // Note the Lookup object is owned solely by this lambda which is destroyed after it runs
+ cNetworkSingleton::Get().GetLookupThread().ScheduleLookup([=]()
{
- case AF_INET:
- {
- sockaddr_in * sa4 = reinterpret_cast<sockaddr_in *>(&sa);
- evdns_base_resolve_reverse(cNetworkSingleton::Get().GetDNSBase(), &(sa4->sin_addr), 0, Callback, this);
- break;
- }
- case AF_INET6:
- {
- sockaddr_in6 * sa6 = reinterpret_cast<sockaddr_in6 *>(&sa);
- evdns_base_resolve_reverse_ipv6(cNetworkSingleton::Get().GetDNSBase(), &(sa6->sin6_addr), 0, Callback, this);
- break;
- }
- default:
+ sockaddr_storage sa;
+ int salen = sizeof(sa);
+ memset(&sa, 0, sizeof(sa));
+
+ int ErrCode = evutil_parse_sockaddr_port(Lookup->m_IP.c_str(), reinterpret_cast<sockaddr *>(&sa), &salen);
+
+ if (ErrCode != 0)
{
- LOGWARNING("%s: Unknown address family: %d", __FUNCTION__, sa.ss_family);
- ASSERT(!"Unknown address family");
- return false;
+ LOGD("Failed to parse IP address \"%s\".", Lookup->m_IP.c_str());
+ Lookup->Callback(ErrCode, nullptr);
+ return;
}
- } // switch (address family)
- return true;
+
+ char Hostname[NI_MAXHOST];
+ char ServInfo[NI_MAXSERV];
+
+ ErrCode = getnameinfo(
+ reinterpret_cast<sockaddr *>(&sa),
+ static_cast<socklen_t>(salen),
+ Hostname, sizeof(Hostname),
+ ServInfo, sizeof(ServInfo),
+ 0
+ );
+ Lookup->Callback(ErrCode, Hostname);
+ });
}
-void cIPLookup::Callback(int a_Result, char a_Type, int a_Count, int a_Ttl, void * a_Addresses, void * a_Self)
+void cIPLookup::Callback(int a_Result, const char * a_Address)
{
- // Get the Self class:
- cIPLookup * Self = reinterpret_cast<cIPLookup *>(a_Self);
- ASSERT(Self != nullptr);
-
// Call the proper callback based on the event received:
- if ((a_Result != 0) || (a_Addresses == nullptr))
+ if ((a_Result != 0) || (a_Address == nullptr))
{
// An error has occurred, notify the error callback:
- Self->m_Callbacks->OnError(a_Result, evutil_socket_error_to_string(a_Result));
+ m_Callbacks->OnError(a_Result, ErrorString(a_Result));
}
else
{
// Call the success handler:
- Self->m_Callbacks->OnNameResolved(*(reinterpret_cast<char **>(a_Addresses)), Self->m_IP);
- Self->m_Callbacks->OnFinished();
+ m_Callbacks->OnNameResolved(a_Address, m_IP);
+ m_Callbacks->OnFinished();
}
- cNetworkSingleton::Get().RemoveIPLookup(Self);
}
@@ -101,14 +93,7 @@ bool cNetwork::IPToHostName(
cNetwork::cResolveNameCallbacksPtr a_Callbacks
)
{
- auto res = std::make_shared<cIPLookup>(a_Callbacks);
- cNetworkSingleton::Get().AddIPLookup(res);
- if (!res->Lookup(a_IP))
- {
- // Lookup failed early on, remove the object completely:
- cNetworkSingleton::Get().RemoveIPLookup(res.get());
- return false;
- }
+ cIPLookup::Lookup(a_IP, std::move(a_Callbacks));
return true;
}