// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: connect.cc,v 1.6 2000/05/28 04:34:44 jgg Exp $
+// $Id: connect.cc,v 1.10.2.1 2004/01/16 18:58:50 mdz Exp $
/* ######################################################################
Connect - Replacement connect call
-
+
+ This was originally authored by Jason Gunthorpe <jgg@debian.org>
+ and is placed in the Public Domain, do with it what you will.
+
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
+#include <sstream>
+
+#include<set>
+#include<string>
// Internet stuff
#include <netinet/in.h>
#include <netdb.h>
#include "rfc2553emu.h"
+#include <apti18n.h>
/*}}}*/
static string LastHost;
static struct addrinfo *LastHostAddr = 0;
static struct addrinfo *LastUsed = 0;
+// Set of IP/hostnames that we timed out before or couldn't resolve
+static std::set<string> bad_addr;
+
+// RotateDNS - Select a new server from a DNS rotation /*{{{*/
+// ---------------------------------------------------------------------
+/* This is called during certain errors in order to recover by selecting a
+ new server */
+void RotateDNS()
+{
+ if (LastUsed != 0 && LastUsed->ai_next != 0)
+ LastUsed = LastUsed->ai_next;
+ else
+ LastUsed = LastHostAddr;
+}
+ /*}}}*/
// DoConnect - Attempt a connect operation /*{{{*/
// ---------------------------------------------------------------------
/* This helper function attempts a connection to a single address. */
// Show a status indicator
char Name[NI_MAXHOST];
char Service[NI_MAXSERV];
- Name[0] = 0;
+
+ Name[0] = 0;
Service[0] = 0;
getnameinfo(Addr->ai_addr,Addr->ai_addrlen,
Name,sizeof(Name),Service,sizeof(Service),
NI_NUMERICHOST|NI_NUMERICSERV);
- Owner->Status("Connecting to %s (%s)",Host.c_str(),Name);
-
+ Owner->Status(_("Connecting to %s (%s)"),Host.c_str(),Name);
+
+ // if that addr did timeout before, we do not try it again
+ if(bad_addr.find(string(Name)) != bad_addr.end())
+ return false;
+
+ /* If this is an IP rotation store the IP we are using.. If something goes
+ wrong this will get tacked onto the end of the error message */
+ if (LastHostAddr->ai_next != 0)
+ {
+ std::stringstream ss;
+ ioprintf(ss, _("[IP: %s %s]"),Name,Service);
+ Owner->SetIP(ss.str());
+ }
+
// Get a socket
if ((Fd = socket(Addr->ai_family,Addr->ai_socktype,
Addr->ai_protocol)) < 0)
- return _error->Errno("socket","Could not create a socket");
+ return _error->Errno("socket",_("Could not create a socket for %s (f=%u t=%u p=%u)"),
+ Name,Addr->ai_family,Addr->ai_socktype,Addr->ai_protocol);
SetNonBlock(Fd,true);
if (connect(Fd,Addr->ai_addr,Addr->ai_addrlen) < 0 &&
errno != EINPROGRESS)
- return _error->Errno("connect","Cannot initiate the connection "
- "to %s:%s (%s).",Host.c_str(),Service,Name);
+ return _error->Errno("connect",_("Cannot initiate the connection "
+ "to %s:%s (%s)."),Host.c_str(),Service,Name);
/* This implements a timeout for connect by opening the connection
nonblocking */
- if (WaitFd(Fd,true,TimeOut) == false)
- return _error->Error("Could not connect to %s:%s (%s), "
- "connection timed out",Host.c_str(),Service,Name);
-
+ if (WaitFd(Fd,true,TimeOut) == false) {
+ bad_addr.insert(bad_addr.begin(), string(Name));
+ Owner->SetFailReason("Timeout");
+ return _error->Error(_("Could not connect to %s:%s (%s), "
+ "connection timed out"),Host.c_str(),Service,Name);
+ }
+
// Check the socket for an error condition
unsigned int Err;
unsigned int Len = sizeof(Err);
if (getsockopt(Fd,SOL_SOCKET,SO_ERROR,&Err,&Len) != 0)
- return _error->Errno("getsockopt","Failed");
+ return _error->Errno("getsockopt",_("Failed"));
if (Err != 0)
{
errno = Err;
- return _error->Errno("connect","Could not connect to %s:%s (%s).",Host.c_str(),
+ if(errno == ECONNREFUSED)
+ Owner->SetFailReason("ConnectionRefused");
+ return _error->Errno("connect",_("Could not connect to %s:%s (%s)."),Host.c_str(),
Service,Name);
}
sensible */
if (LastHost != Host || LastPort != Port)
{
- Owner->Status("Connecting to %s",Host.c_str());
+ Owner->Status(_("Connecting to %s"),Host.c_str());
// Free the old address structure
if (LastHostAddr != 0)
Hints.ai_socktype = SOCK_STREAM;
Hints.ai_protocol = 0;
+ // if we couldn't resolve the host before, we don't try now
+ if(bad_addr.find(Host) != bad_addr.end())
+ return _error->Error(_("Could not resolve '%s'"),Host.c_str());
+
// Resolve both the host and service simultaneously
while (1)
{
DefPort = 0;
continue;
}
- return _error->Error("Could not resolve '%s'",Host.c_str());
+ bad_addr.insert(bad_addr.begin(), Host);
+ Owner->SetFailReason("ResolveFailure");
+ return _error->Error(_("Could not resolve '%s'"),Host.c_str());
}
- return _error->Error("Something wicked happend resolving '%s:%s'",
- Host.c_str(),ServStr);
+ if (Res == EAI_AGAIN)
+ {
+ Owner->SetFailReason("TmpResolveFailure");
+ return _error->Error(_("Temporary failure resolving '%s'"),
+ Host.c_str());
+ }
+ return _error->Error(_("Something wicked happened resolving '%s:%s' (%i)"),
+ Host.c_str(),ServStr,Res);
}
break;
}
CurHost = CurHost->ai_next;
}
while (CurHost != 0 && CurHost->ai_family == AF_UNIX);
-
- LastUsed = 0;
+
+ /* If we reached the end of the search list then wrap around to the
+ start */
+ if (CurHost == 0 && LastUsed != 0)
+ CurHost = LastHostAddr;
+
+ // Reached the end of the search cycle
+ if (CurHost == LastUsed)
+ break;
+
if (CurHost != 0)
_error->Discard();
- }
+ }
if (_error->PendingError() == true)
- return false;
- return _error->Error("Unable to connect to %s:",Host.c_str(),ServStr);
+ return false;
+ return _error->Error(_("Unable to connect to %s %s:"),Host.c_str(),ServStr);
}
/*}}}*/
HCoop / ntk / apt.git / blobdiff