allow getaddrinfo flag AI_ADDRCONFIG to be disabled

[apt.git] / methods / connect.cc

diff --git a/methods/connect.cc b/methods/connect.cc
index 5612af6ec7f018ce61cde95824bf0c569c809598..b4cd17ca867a7725a9a0c27e9268c5926ee72a7c 100644 (file)
--- a/methods/connect.cc
+++ b/methods/connect.cc
@@ -45,7 +45,6 @@ static struct addrinfo *LastHostAddr = 0;
 static struct addrinfo *LastUsed = 0;
 
 static std::vector<SrvRec> SrvRecords;
-static int LastSrvRecord = 0;
 
 // Set of IP/hostnames that we timed out before or couldn't resolve
 static std::set<std::string> bad_addr;
@@ -134,11 +133,10 @@ static bool DoConnect(struct addrinfo *Addr,std::string Host,
    return true;
 }
                                                                        /*}}}*/
-
-// Connect to a given Hostname 
-bool ConnectToHostname(std::string Host,int Port,const char *Service,
-                            int DefPort,int &Fd,
-                            unsigned long TimeOut,pkgAcqMethod *Owner)
+// Connect to a given Hostname                                         /*{{{*/
+static bool ConnectToHostname(std::string const &Host, int const Port,
+      const char * const Service, int DefPort, int &Fd,
+      unsigned long const TimeOut, pkgAcqMethod * const Owner)
 {
    // Convert the port name/number
    char ServStr[300];
@@ -166,7 +164,12 @@ bool ConnectToHostname(std::string Host,int Port,const char *Service,
       struct addrinfo Hints;
       memset(&Hints,0,sizeof(Hints));
       Hints.ai_socktype = SOCK_STREAM;
-      Hints.ai_flags = AI_ADDRCONFIG;
+      Hints.ai_flags = 0;
+      // see getaddrinfo(3): only return address if system has such a address configured
+      // useful if system is ipv4 only, to not get ipv6, but that fails if the system has
+      // no address configured: e.g. offline and trying to connect to localhost.
+      if (_config->FindB("Acquire::Connect::AddrConfig", true) == true)
+        Hints.ai_flags |= AI_ADDRCONFIG;
       Hints.ai_protocol = 0;
       
       if(_config->FindB("Acquire::ForceIPv4", false) == true)
@@ -272,7 +275,7 @@ bool Connect(std::string Host,int Port,const char *Service,
    if(LastHost != Host || LastPort != Port)
    {
       SrvRecords.clear();
-      if (_config->FindB("Acquire::EnableSrvRecods", true) == true)
+      if (_config->FindB("Acquire::EnableSrvRecords", true) == true)
          GetSrvRecords(Host, DefPort, SrvRecords);
    }
    // we have no SrvRecords for this host, connect right away