X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/0837bd25607acd90944a4bfded58d582371ba112..4bec02c237e8e218bc7d4bcf7142e0450480138b:/methods/connect.cc diff --git a/methods/connect.cc b/methods/connect.cc index a7ef8c669..a5af1f1a6 100644 --- a/methods/connect.cc +++ b/methods/connect.cc @@ -1,10 +1,13 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: connect.cc,v 1.1 1999/05/29 03:25:03 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 + and is placed in the Public Domain, do with it what you will. + ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ @@ -15,6 +18,10 @@ #include #include #include +#include + +#include +#include // Internet stuff #include @@ -23,6 +30,7 @@ #include #include "rfc2553emu.h" +#include /*}}}*/ static string LastHost; @@ -30,6 +38,21 @@ static int LastPort = 0; 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 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. */ @@ -38,86 +61,149 @@ static bool DoConnect(struct addrinfo *Addr,string Host, { // 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"); + else if (errno == ETIMEDOUT) + Owner->SetFailReason("ConnectionTimedOut"); + bad_addr.insert(bad_addr.begin(), string(Name)); + return _error->Errno("connect",_("Could not connect to %s:%s (%s)."),Host.c_str(), + Service,Name); + } + return true; } /*}}}*/ -// Connect - Connect to a server /*{{{*/ +// 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_flags = AI_ADDRCONFIG; + Hints.ai_protocol = 0; - // 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()); + // 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) + { + 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 - %s)"), + Host.c_str(),ServStr,Res,gai_strerror(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; @@ -132,12 +218,28 @@ bool Connect(string Host,int Port,const char *Service,int &Fd, 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); } /*}}}*/