// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: connect.cc,v 1.2 1999/07/10 05:39:29 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];
- Name[0] = 0;
- getnameinfo(Addr->ai_addr,Addr->ai_addrlen,
- Name,sizeof(Name),0,0,NI_NUMERICHOST);
- Owner->Status("Connecting to %s (%s)",Host.c_str(),Name);
+ char Service[NI_MAXSERV];
+ 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);
+
+ // 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).",Host.c_str(),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), "
- "connection timed out",Host.c_str(),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)
- return _error->Error("Could not connect to %s (%s).",Host.c_str(),Name);
-
+ {
+ errno = Err;
+ if(errno == ECONNREFUSED)
+ Owner->SetFailReason("ConnectionRefused");
+ return _error->Errno("connect",_("Could not connect to %s:%s (%s)."),Host.c_str(),
+ Service,Name);
+ }
+
return true;
}
/*}}}*/
// Connect - Connect to a server /*{{{*/
// ---------------------------------------------------------------------
/* Performs a connection to the server */
-bool Connect(string Host,int Port,const char *Service,int &Fd,
+bool Connect(string Host,int Port,const char *Service,int DefPort,int &Fd,
unsigned long TimeOut,pkgAcqMethod *Owner)
{
if (_error->PendingError() == true)
return false;
+
+ // Convert the port name/number
+ char ServStr[300];
+ if (Port != 0)
+ snprintf(ServStr,sizeof(ServStr),"%u",Port);
+ else
+ snprintf(ServStr,sizeof(ServStr),"%s",Service);
/* We used a cached address record.. Yes this is against the spec but
the way we have setup our rotating dns suggests that this is more
sensible */
if (LastHost != Host || LastPort != Port)
{
- Owner->Status("Connecting to %s",Host.c_str());
-
- // Lookup the host
- char S[300];
- if (Port != 0)
- snprintf(S,sizeof(S),"%u",Port);
- else
- snprintf(S,sizeof(S),"%s",Service);
+ Owner->Status(_("Connecting to %s"),Host.c_str());
// Free the old address structure
if (LastHostAddr != 0)
{
freeaddrinfo(LastHostAddr);
LastHostAddr = 0;
+ LastUsed = 0;
}
// We only understand SOCK_STREAM sockets.
struct addrinfo Hints;
memset(&Hints,0,sizeof(Hints));
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
- int Res;
- if ((Res = getaddrinfo(Host.c_str(),S,&Hints,&LastHostAddr)) != 0 ||
- LastHostAddr == 0)
+ while (1)
{
- if (Res == EAI_SERVICE)
- return _error->Error("Could not resolve service '%s'",S);
-
- if (Res == EAI_NONAME)
- return _error->Error("Could not resolve '%s'",Host.c_str());
-
- return _error->Error("Something wicked happend resolving '%s/%s'",
- Host.c_str(),S);
+ int Res;
+ if ((Res = getaddrinfo(Host.c_str(),ServStr,&Hints,&LastHostAddr)) != 0 ||
+ LastHostAddr == 0)
+ {
+ if (Res == EAI_NONAME || Res == EAI_SERVICE)
+ {
+ if (DefPort != 0)
+ {
+ snprintf(ServStr,sizeof(ServStr),"%u",DefPort);
+ DefPort = 0;
+ continue;
+ }
+ bad_addr.insert(bad_addr.begin(), Host);
+ Owner->SetFailReason("ResolveFailure");
+ return _error->Error(_("Could not resolve '%s'"),Host.c_str());
+ }
+
+ 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;
}
LastHost = Host;
LastPort = Port;
- LastUsed = 0;
}
- // Get the printable IP address
+ // When we have an IP rotation stay with the last IP.
struct addrinfo *CurHost = LastHostAddr;
if (LastUsed != 0)
CurHost = LastUsed;
close(Fd);
Fd = -1;
- CurHost = CurHost->ai_next;
- LastUsed = 0;
+ // Ignore UNIX domain sockets
+ do
+ {
+ CurHost = CurHost->ai_next;
+ }
+ while (CurHost != 0 && CurHost->ai_family == AF_UNIX);
+
+ /* 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();
- }
-
- return false;
+ }
+
+ if (_error->PendingError() == true)
+ return false;
+ return _error->Error(_("Unable to connect to %s %s:"),Host.c_str(),ServStr);
}
/*}}}*/
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