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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+// $Id: connect.cc,v 1.1 1999/05/29 03:25:03 jgg Exp $
+/* ######################################################################
+
+ Connect - Replacement connect call
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include "connect.h"
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+
+// Internet stuff
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "rfc2553emu.h"
+ /*}}}*/
+
+static string LastHost;
+static int LastPort = 0;
+static struct addrinfo *LastHostAddr = 0;
+static struct addrinfo *LastUsed = 0;
+
+// DoConnect - Attempt a connect operation /*{{{*/
+// ---------------------------------------------------------------------
+/* This helper function attempts a connection to a single address. */
+static bool DoConnect(struct addrinfo *Addr,string Host,
+ unsigned long TimeOut,int &Fd,pkgAcqMethod *Owner)
+{
+ // 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);
+
+ // 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");
+
+ 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);
+
+ /* 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);
+
+ // 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");
+
+ if (Err != 0)
+ return _error->Error("Could not connect to %s (%s).",Host.c_str(),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,
+ unsigned long TimeOut,pkgAcqMethod *Owner)
+{
+ if (_error->PendingError() == true)
+ return false;
+
+ /* 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);
+
+ // Free the old address structure
+ if (LastHostAddr != 0)
+ {
+ freeaddrinfo(LastHostAddr);
+ LastHostAddr = 0;
+ }
+
+ // We only understand SOCK_STREAM sockets.
+ struct addrinfo Hints;
+ memset(&Hints,0,sizeof(Hints));
+ Hints.ai_socktype = SOCK_STREAM;
+
+ // Resolve both the host and service simultaneously
+ if (getaddrinfo(Host.c_str(),S,&Hints,&LastHostAddr) != 0 ||
+ LastHostAddr == 0)
+ return _error->Error("Could not resolve '%s'",Host.c_str());
+
+ LastHost = Host;
+ LastPort = Port;
+ LastUsed = 0;
+ }
+
+ // Get the printable IP address
+ struct addrinfo *CurHost = LastHostAddr;
+ if (LastUsed != 0)
+ CurHost = LastUsed;
+
+ while (CurHost != 0)
+ {
+ if (DoConnect(CurHost,Host,TimeOut,Fd,Owner) == true)
+ {
+ LastUsed = CurHost;
+ return true;
+ }
+ close(Fd);
+ Fd = -1;
+
+ CurHost = CurHost->ai_next;
+ LastUsed = 0;
+ if (CurHost != 0)
+ _error->Discard();
+ }
+
+ return false;
+}
+ /*}}}*/