X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/eaa204a9808eb2392f4a03d703b585ba3aa3b018..258b9e512c4001e806c5c0966acecd3d742ec6e9:/methods/connect.cc?ds=sidebyside

diff --git a/methods/connect.cc b/methods/connect.cc
index 145001fb3..b4cd17ca8 100644
--- a/methods/connect.cc
+++ b/methods/connect.cc
@@ -11,14 +11,22 @@
    ##################################################################### */
 									/*}}}*/
 // Include Files							/*{{{*/
-#include "connect.h"
+#include <config.h>
+
 #include <apt-pkg/error.h>
 #include <apt-pkg/fileutl.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/acquire-method.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/srvrec.h>
 
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
 #include <sstream>
+#include <string.h>
+#include<set>
+#include<string>
 
 // Internet stuff
 #include <netinet/in.h>
@@ -26,15 +34,21 @@
 #include <arpa/inet.h>
 #include <netdb.h>
 
+#include "connect.h"
 #include "rfc2553emu.h"
 #include <apti18n.h>
 									/*}}}*/
 
-static string LastHost;
+static std::string LastHost;
 static int LastPort = 0;
 static struct addrinfo *LastHostAddr = 0;
 static struct addrinfo *LastUsed = 0;
 
+static std::vector<SrvRec> SrvRecords;
+
+// Set of IP/hostnames that we timed out before or couldn't resolve
+static std::set<std::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 
@@ -50,7 +64,7 @@ void RotateDNS()
 // DoConnect - Attempt a connect operation				/*{{{*/
 // ---------------------------------------------------------------------
 /* This helper function attempts a connection to a single address. */
-static bool DoConnect(struct addrinfo *Addr,string Host,
+static bool DoConnect(struct addrinfo *Addr,std::string Host,
 		      unsigned long TimeOut,int &Fd,pkgAcqMethod *Owner)
 {
    // Show a status indicator
@@ -64,6 +78,10 @@ static bool DoConnect(struct addrinfo *Addr,string Host,
 	       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(std::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)
@@ -88,6 +106,7 @@ static bool DoConnect(struct addrinfo *Addr,string Host,
    /* This implements a timeout for connect by opening the connection
       nonblocking */
    if (WaitFd(Fd,true,TimeOut) == false) {
+      bad_addr.insert(bad_addr.begin(), std::string(Name));
       Owner->SetFailReason("Timeout");
       return _error->Error(_("Could not connect to %s:%s (%s), "
 			   "connection timed out"),Host.c_str(),Service,Name);
@@ -104,6 +123,9 @@ static bool DoConnect(struct addrinfo *Addr,string Host,
       errno = Err;
       if(errno == ECONNREFUSED)
          Owner->SetFailReason("ConnectionRefused");
+      else if (errno == ETIMEDOUT)
+	 Owner->SetFailReason("ConnectionTimedOut");
+      bad_addr.insert(bad_addr.begin(), std::string(Name));
       return _error->Errno("connect",_("Could not connect to %s:%s (%s)."),Host.c_str(),
 			   Service,Name);
    }
@@ -111,21 +133,17 @@ static bool DoConnect(struct addrinfo *Addr,string Host,
    return true;
 }
 									/*}}}*/
-// Connect - Connect to a server					/*{{{*/
-// ---------------------------------------------------------------------
-/* Performs a connection to the server */
-bool Connect(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)
 {
-   if (_error->PendingError() == true)
-      return false;
-
    // Convert the port name/number
    char ServStr[300];
    if (Port != 0)
-      snprintf(ServStr,sizeof(ServStr),"%u",Port);
+      snprintf(ServStr,sizeof(ServStr),"%i", Port);
    else
-      snprintf(ServStr,sizeof(ServStr),"%s",Service);
+      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
@@ -146,8 +164,25 @@ bool Connect(string Host,int Port,const char *Service,int DefPort,int &Fd,
       struct addrinfo Hints;
       memset(&Hints,0,sizeof(Hints));
       Hints.ai_socktype = SOCK_STREAM;
+      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)
+         Hints.ai_family = AF_INET;
+      else if(_config->FindB("Acquire::ForceIPv6", false) == true)
+         Hints.ai_family = AF_INET6;
+      else
+         Hints.ai_family = AF_UNSPEC;
+
+      // 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)
       {
@@ -159,10 +194,11 @@ bool Connect(string Host,int Port,const char *Service,int DefPort,int &Fd,
 	    {
 	       if (DefPort != 0)
 	       {
-		  snprintf(ServStr,sizeof(ServStr),"%u",DefPort);
+		  snprintf(ServStr, sizeof(ServStr), "%i", DefPort);
 		  DefPort = 0;
 		  continue;
 	       }
+	       bad_addr.insert(bad_addr.begin(), Host);
 	       Owner->SetFailReason("ResolveFailure");
 	       return _error->Error(_("Could not resolve '%s'"),Host.c_str());
 	    }
@@ -173,8 +209,11 @@ bool Connect(string Host,int Port,const char *Service,int DefPort,int &Fd,
 	       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);
+	    if (Res == EAI_SYSTEM)
+	       return _error->Errno("getaddrinfo", _("System error resolving '%s:%s'"),
+                                      Host.c_str(),ServStr);
+	    return _error->Error(_("Something wicked happened resolving '%s:%s' (%i - %s)"),
+				 Host.c_str(),ServStr,Res,gai_strerror(Res));
 	 }
 	 break;
       }
@@ -220,6 +259,40 @@ bool Connect(string Host,int Port,const char *Service,int DefPort,int &Fd,
 
    if (_error->PendingError() == true)
       return false;   
-   return _error->Error(_("Unable to connect to %s %s:"),Host.c_str(),ServStr);
+   return _error->Error(_("Unable to connect to %s:%s:"),Host.c_str(),ServStr);
 }
 									/*}}}*/
+// Connect - Connect to a server					/*{{{*/
+// ---------------------------------------------------------------------
+/* Performs a connection to the server (including SRV record lookup) */
+bool Connect(std::string Host,int Port,const char *Service,
+                            int DefPort,int &Fd,
+                            unsigned long TimeOut,pkgAcqMethod *Owner)
+{
+   if (_error->PendingError() == true)
+      return false;
+
+   if(LastHost != Host || LastPort != Port)
+   {
+      SrvRecords.clear();
+      if (_config->FindB("Acquire::EnableSrvRecords", true) == true)
+         GetSrvRecords(Host, DefPort, SrvRecords);
+   }
+   // we have no SrvRecords for this host, connect right away
+   if(SrvRecords.size() == 0)
+      return ConnectToHostname(Host, Port, Service, DefPort, Fd, 
+                                    TimeOut, Owner);
+
+   // try to connect in the priority order of the srv records
+   while(SrvRecords.size() > 0)
+   {
+      Host = PopFromSrvRecs(SrvRecords).target;
+      if(ConnectToHostname(Host, Port, Service, DefPort, Fd, TimeOut, Owner))
+         return true;
+
+      // we couldn't connect to this one, use the next
+      SrvRecords.erase(SrvRecords.begin());
+   }
+
+   return false;
+}