// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: ftp.cc,v 1.20 2000/06/18 04:19:39 jgg Exp $
+// $Id: ftp.cc,v 1.29 2002/04/24 05:35:13 jgg Exp $
/* ######################################################################
- HTTP Aquire Method - This is the FTP aquire method for APT.
+ FTP Aquire Method - This is the FTP aquire method for APT.
This is a very simple implementation that does not try to optimize
at all. Commands are sent syncronously with the FTP server (as the
#include <apt-pkg/fileutl.h>
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/error.h>
-#include <apt-pkg/md5.h>
+#include <apt-pkg/hashes.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdio.h>
#include <errno.h>
#include <stdarg.h>
+#include <iostream>
// Internet stuff
#include <netinet/in.h>
#include "ftp.h"
/*}}}*/
+using namespace std;
+
+/* This table is for the EPRT and EPSV commands, it maps the OS address
+ family to the IETF address families */
+struct AFMap
+{
+ unsigned long Family;
+ unsigned long IETFFamily;
+};
+
+#ifndef AF_INET6
+struct AFMap AFMap[] = {{AF_INET,1},{}};
+#else
+struct AFMap AFMap[] = {{AF_INET,1},{AF_INET6,2},{}};
+#endif
+
unsigned long TimeOut = 120;
URI Proxy;
string FtpMethod::FailFile;
DataListenFd(-1), ServerName(Srv)
{
Debug = _config->FindB("Debug::Acquire::Ftp",false);
- memset(&PasvAddr,0,sizeof(PasvAddr));
+ PasvAddr = 0;
}
/*}}}*/
// FTPConn::~FTPConn - Destructor /*{{{*/
DataFd = -1;
close(DataListenFd);
DataListenFd = -1;
- memset(&PasvAddr,0,sizeof(PasvAddr));
+
+ if (PasvAddr != 0)
+ freeaddrinfo(PasvAddr);
+ PasvAddr = 0;
}
/*}}}*/
// FTPConn::Open - Open a new connection /*{{{*/
return true;
Close();
-
+
// Determine the proxy setting
if (getenv("ftp_proxy") == 0)
{
else
Proxy = getenv("ftp_proxy");
+ // Parse no_proxy, a , separated list of domains
+ if (getenv("no_proxy") != 0)
+ {
+ if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
+ Proxy = "";
+ }
+
// Determine what host and port to use based on the proxy settings
int Port = 0;
string Host;
Host = Proxy.Host;
}
- // Connect to the remote server
+ /* Connect to the remote server. Since FTP is connection oriented we
+ want to make sure we get a new server every time we reconnect */
+ RotateDNS();
if (Connect(Host,Port,"ftp",21,ServerFd,TimeOut,Owner) == false)
return false;
- socklen_t Len = sizeof(Peer);
- if (getpeername(ServerFd,(sockaddr *)&Peer,&Len) != 0)
+
+ // Login must be before getpeername otherwise dante won't work.
+ Owner->Status("Logging in");
+ bool Res = Login();
+
+ // Get the remote server's address
+ PeerAddrLen = sizeof(PeerAddr);
+ if (getpeername(ServerFd,(sockaddr *)&PeerAddr,&PeerAddrLen) != 0)
return _error->Errno("getpeername","Unable to determine the peer name");
- Owner->Status("Logging in");
- return Login();
+ // Get the local machine's address
+ ServerAddrLen = sizeof(ServerAddr);
+ if (getsockname(ServerFd,(sockaddr *)&ServerAddr,&ServerAddrLen) != 0)
+ return _error->Errno("getsockname","Unable to determine the local name");
+
+ return Res;
}
/*}}}*/
// FTPConn::Login - Login to the remote server /*{{{*/
// Setup the variables needed for authentication
string User = "anonymous";
- string Pass = "apt_get_ftp_2.0@debian.linux.user";
+ string Pass = "apt_get_ftp_2.1@debian.linux.user";
// Fill in the user/pass
if (ServerName.User.empty() == false)
if (_config->Exists("Acquire::FTP::Passive::" + ServerName.Host) == true)
TryPassive = _config->FindB("Acquire::FTP::Passive::" + ServerName.Host,true);
else
- TryPassive = _config->FindB("Acquire::FTP::Passive",true);
+ TryPassive = _config->FindB("Acquire::FTP::Passive",true);
}
else
{
}
}
+ // Force the use of extended commands
+ if (_config->Exists("Acquire::FTP::ForceExtended::" + ServerName.Host) == true)
+ ForceExtended = _config->FindB("Acquire::FTP::ForceExtended::" + ServerName.Host,true);
+ else
+ ForceExtended = _config->FindB("Acquire::FTP::ForceExtended",false);
+
// Binary mode
if (WriteMsg(Tag,Msg,"TYPE I") == false)
return false;
// Suck it back
int Res = read(ServerFd,Buffer + Len,sizeof(Buffer) - Len);
+ if (Res == 0)
+ _error->Error("Server closed the connection");
if (Res <= 0)
{
_error->Errno("read","Read error");
// ---------------------------------------------------------------------
/* Try to enter passive mode, the return code does not indicate if passive
mode could or could not be established, only if there was a fatal error.
- Borrowed mostly from lftp. We have to enter passive mode every time
- we make a data connection :| */
+ We have to enter passive mode every time we make a data connection :| */
bool FTPConn::GoPasv()
{
+ /* The PASV command only works on IPv4 sockets, even though it could
+ in theory suppory IPv6 via an all zeros reply */
+ if (((struct sockaddr *)&PeerAddr)->sa_family != AF_INET ||
+ ForceExtended == true)
+ return ExtGoPasv();
+
+ if (PasvAddr != 0)
+ freeaddrinfo(PasvAddr);
+ PasvAddr = 0;
+
// Try to enable pasv mode
unsigned int Tag;
string Msg;
// Unsupported function
string::size_type Pos = Msg.find('(');
if (Tag >= 400 || Pos == string::npos)
- {
- memset(&PasvAddr,0,sizeof(PasvAddr));
return true;
- }
// Scan it
unsigned a0,a1,a2,a3,p0,p1;
if (sscanf(Msg.c_str() + Pos,"(%u,%u,%u,%u,%u,%u)",&a0,&a1,&a2,&a3,&p0,&p1) != 6)
+ return true;
+
+ /* Some evil servers return 0 to mean their addr. We can actually speak
+ to these servers natively using IPv6 */
+ if (a0 == 0 && a1 == 0 && a2 == 0 && a3 == 0)
{
- memset(&PasvAddr,0,sizeof(PasvAddr));
+ // Get the IP in text form
+ char Name[NI_MAXHOST];
+ char Service[NI_MAXSERV];
+ getnameinfo((struct sockaddr *)&PeerAddr,PeerAddrLen,
+ Name,sizeof(Name),Service,sizeof(Service),
+ NI_NUMERICHOST|NI_NUMERICSERV);
+
+ struct addrinfo Hints;
+ memset(&Hints,0,sizeof(Hints));
+ Hints.ai_socktype = SOCK_STREAM;
+ Hints.ai_family = ((struct sockaddr *)&PeerAddr)->sa_family;
+ Hints.ai_flags |= AI_NUMERICHOST;
+
+ // Get a new passive address.
+ char Port[100];
+ snprintf(Port,sizeof(Port),"%u",(p0 << 8) + p1);
+ if (getaddrinfo(Name,Port,&Hints,&PasvAddr) != 0)
+ return true;
return true;
}
- // lftp used this horrid byte order manipulation.. Ik.
- PasvAddr.sin_family = AF_INET;
- unsigned char *a;
- unsigned char *p;
- a = (unsigned char *)&PasvAddr.sin_addr;
- p = (unsigned char *)&PasvAddr.sin_port;
+ struct addrinfo Hints;
+ memset(&Hints,0,sizeof(Hints));
+ Hints.ai_socktype = SOCK_STREAM;
+ Hints.ai_family = AF_INET;
+ Hints.ai_flags |= AI_NUMERICHOST;
- // Some evil servers return 0 to mean their addr
- if (a0 == 0 && a1 == 0 && a2 == 0 && a3 == 0)
+ // Get a new passive address.
+ char Port[100];
+ snprintf(Port,sizeof(Port),"%u",(p0 << 8) + p1);
+ char Name[100];
+ snprintf(Name,sizeof(Name),"%u.%u.%u.%u",a0,a1,a2,a3);
+ if (getaddrinfo(Name,Port,&Hints,&PasvAddr) != 0)
+ return true;
+ return true;
+}
+ /*}}}*/
+// FTPConn::ExtGoPasv - Enter Extended Passive mode /*{{{*/
+// ---------------------------------------------------------------------
+/* Try to enter extended passive mode. See GoPasv above and RFC 2428 */
+bool FTPConn::ExtGoPasv()
+{
+ if (PasvAddr != 0)
+ freeaddrinfo(PasvAddr);
+ PasvAddr = 0;
+
+ // Try to enable pasv mode
+ unsigned int Tag;
+ string Msg;
+ if (WriteMsg(Tag,Msg,"EPSV") == false)
+ return false;
+
+ // Unsupported function
+ string::size_type Pos = Msg.find('(');
+ if (Tag >= 400 || Pos == string::npos)
+ return true;
+
+ // Scan it
+ string::const_iterator List[4];
+ unsigned Count = 0;
+ Pos++;
+ for (string::const_iterator I = Msg.begin() + Pos; I < Msg.end(); I++)
+ {
+ if (*I != Msg[Pos])
+ continue;
+ if (Count >= 4)
+ return true;
+ List[Count++] = I;
+ }
+ if (Count != 4)
+ return true;
+
+ // Break it up ..
+ unsigned long Proto = 0;
+ unsigned long Port = 0;
+ string IP;
+ IP = string(List[1]+1,List[2]);
+ Port = atoi(string(List[2]+1,List[3]).c_str());
+ if (IP.empty() == false)
+ Proto = atoi(string(List[0]+1,List[1]).c_str());
+
+ if (Port == 0)
+ return false;
+
+ // String version of the port
+ char PStr[100];
+ snprintf(PStr,sizeof(PStr),"%lu",Port);
+
+ // Get the IP in text form
+ struct addrinfo Hints;
+ memset(&Hints,0,sizeof(Hints));
+ Hints.ai_socktype = SOCK_STREAM;
+ Hints.ai_flags |= AI_NUMERICHOST;
+
+ /* The RFC defined case, connect to the old IP/protocol using the
+ new port. */
+ if (IP.empty() == true)
{
- PasvAddr.sin_addr = Peer.sin_addr;
+ // Get the IP in text form
+ char Name[NI_MAXHOST];
+ char Service[NI_MAXSERV];
+ getnameinfo((struct sockaddr *)&PeerAddr,PeerAddrLen,
+ Name,sizeof(Name),Service,sizeof(Service),
+ NI_NUMERICHOST|NI_NUMERICSERV);
+ IP = Name;
+ Hints.ai_family = ((struct sockaddr *)&PeerAddr)->sa_family;
}
else
{
- a[0] = a0;
- a[1] = a1;
- a[2] = a2;
- a[3] = a3;
+ // Get the family..
+ Hints.ai_family = 0;
+ for (unsigned J = 0; AFMap[J].Family != 0; J++)
+ if (AFMap[J].IETFFamily == Proto)
+ Hints.ai_family = AFMap[J].Family;
+ if (Hints.ai_family == 0)
+ return true;
}
- p[0] = p0;
- p[1] = p1;
+ // Get a new passive address.
+ int Res;
+ if ((Res = getaddrinfo(IP.c_str(),PStr,&Hints,&PasvAddr)) != 0)
+ return true;
return true;
}
return false;
// Oops, didn't work out, don't bother trying again.
- if (PasvAddr.sin_port == 0)
+ if (PasvAddr == 0)
TryPassive = false;
}
// Passive mode?
- if (PasvAddr.sin_port != 0)
+ if (PasvAddr != 0)
{
// Get a socket
- if ((DataFd = socket(AF_INET,SOCK_STREAM,0)) < 0)
+ if ((DataFd = socket(PasvAddr->ai_family,PasvAddr->ai_socktype,
+ PasvAddr->ai_protocol)) < 0)
return _error->Errno("socket","Could not create a socket");
// Connect to the server
SetNonBlock(DataFd,true);
- if (connect(DataFd,(sockaddr *)&PasvAddr,sizeof(PasvAddr)) < 0 &&
+ if (connect(DataFd,PasvAddr->ai_addr,PasvAddr->ai_addrlen) < 0 &&
errno != EINPROGRESS)
return _error->Errno("socket","Could not create a socket");
if (getsockopt(DataFd,SOL_SOCKET,SO_ERROR,&Err,&Len) != 0)
return _error->Errno("getsockopt","Failed");
if (Err != 0)
- return _error->Error("Could not connect.");
-
+ return _error->Error("Could not connect passive socket.");
+
return true;
}
close(DataListenFd);
DataListenFd = -1;
- // Get a socket
- if ((DataListenFd = socket(AF_INET,SOCK_STREAM,0)) < 0)
+ // Get the information for a listening socket.
+ struct addrinfo *BindAddr = 0;
+ struct addrinfo Hints;
+ memset(&Hints,0,sizeof(Hints));
+ Hints.ai_socktype = SOCK_STREAM;
+ Hints.ai_flags |= AI_PASSIVE;
+ Hints.ai_family = ((struct sockaddr *)&ServerAddr)->sa_family;
+ int Res;
+ if ((Res = getaddrinfo(0,"0",&Hints,&BindAddr)) != 0)
+ return _error->Error("getaddrinfo was unable to get a listening socket");
+
+ // Construct the socket
+ if ((DataListenFd = socket(BindAddr->ai_family,BindAddr->ai_socktype,
+ BindAddr->ai_protocol)) < 0)
+ {
+ freeaddrinfo(BindAddr);
return _error->Errno("socket","Could not create a socket");
+ }
// Bind and listen
- sockaddr_in Addr;
- memset(&Addr,0,sizeof(Addr));
- if (bind(DataListenFd,(sockaddr *)&Addr,sizeof(Addr)) < 0)
+ if (bind(DataListenFd,BindAddr->ai_addr,BindAddr->ai_addrlen) < 0)
+ {
+ freeaddrinfo(BindAddr);
return _error->Errno("bind","Could not bind a socket");
+ }
+ freeaddrinfo(BindAddr);
if (listen(DataListenFd,1) < 0)
return _error->Errno("listen","Could not listen on the socket");
SetNonBlock(DataListenFd,true);
// Determine the name to send to the remote
- sockaddr_in Addr2;
- socklen_t Jnk = sizeof(Addr);
- if (getsockname(DataListenFd,(sockaddr *)&Addr,&Jnk) < 0)
- return _error->Errno("getsockname","Could not determine the socket's name");
- Jnk = sizeof(Addr2);
- if (getsockname(ServerFd,(sockaddr *)&Addr2,&Jnk) < 0)
+ struct sockaddr_storage Addr;
+ socklen_t AddrLen = sizeof(Addr);
+ if (getsockname(DataListenFd,(sockaddr *)&Addr,&AddrLen) < 0)
return _error->Errno("getsockname","Could not determine the socket's name");
-
- // This bit ripped from qftp
- unsigned long badr = ntohl(*(unsigned long *)&Addr2.sin_addr);
- unsigned long bp = ntohs(Addr.sin_port);
- // Send the port command
+ // Reverse the address. We need the server address and the data port.
+ char Name[NI_MAXHOST];
+ char Service[NI_MAXSERV];
+ char Service2[NI_MAXSERV];
+ getnameinfo((struct sockaddr *)&Addr,AddrLen,
+ Name,sizeof(Name),Service,sizeof(Service),
+ NI_NUMERICHOST|NI_NUMERICSERV);
+ getnameinfo((struct sockaddr *)&ServerAddr,ServerAddrLen,
+ Name,sizeof(Name),Service2,sizeof(Service2),
+ NI_NUMERICHOST|NI_NUMERICSERV);
+
+ // Send off an IPv4 address in the old port format
+ if (((struct sockaddr *)&Addr)->sa_family == AF_INET &&
+ ForceExtended == false)
+ {
+ // Convert the dots in the quad into commas
+ for (char *I = Name; *I != 0; I++)
+ if (*I == '.')
+ *I = ',';
+ unsigned long Port = atoi(Service);
+
+ // Send the port command
+ unsigned int Tag;
+ string Msg;
+ if (WriteMsg(Tag,Msg,"PORT %s,%d,%d",
+ Name,
+ (int)(Port >> 8) & 0xff, (int)(Port & 0xff)) == false)
+ return false;
+ if (Tag >= 400)
+ return _error->Error("Unable to send PORT command");
+ return true;
+ }
+
+ // Construct an EPRT command
+ unsigned Proto = 0;
+ for (unsigned J = 0; AFMap[J].Family != 0; J++)
+ if (AFMap[J].Family == ((struct sockaddr *)&Addr)->sa_family)
+ Proto = AFMap[J].IETFFamily;
+ if (Proto == 0)
+ return _error->Error("Unkonwn address family %u (AF_*)",
+ ((struct sockaddr *)&Addr)->sa_family);
+
+ // Send the EPRT command
unsigned int Tag;
string Msg;
- if (WriteMsg(Tag,Msg,"PORT %d,%d,%d,%d,%d,%d",
- (int) (badr >> 24) & 0xff, (int) (badr >> 16) & 0xff,
- (int) (badr >> 8) & 0xff, (int) badr & 0xff,
- (int) (bp >> 8) & 0xff, (int) bp & 0xff) == false)
+ if (WriteMsg(Tag,Msg,"EPRT |%u|%s|%s|",Proto,Name,Service) == false)
return false;
if (Tag >= 400)
- return _error->Error("Unable to send port command");
-
+ return _error->Error("EPRT failed, server said: %s",Msg.c_str());
return true;
}
/*}}}*/
bool FTPConn::Finalize()
{
// Passive mode? Do nothing
- if (PasvAddr.sin_port != 0)
+ if (PasvAddr != 0)
return true;
// Close any old socket..
/* This opens a data connection, sends REST and RETR and then
transfers the file over. */
bool FTPConn::Get(const char *Path,FileFd &To,unsigned long Resume,
- MD5Summation &MD5,bool &Missing)
+ Hashes &Hash,bool &Missing)
{
Missing = false;
if (CreateDataFd() == false)
if (Resume != 0)
{
- if (MD5.AddFD(To.Fd(),Resume) == false)
+ if (Hash.AddFD(To.Fd(),Resume) == false)
{
_error->Errno("read","Problem hashing file");
return false;
break;
}
- MD5.Add(Buffer,Res);
+ Hash.Add(Buffer,Res);
if (To.Write(Buffer,Res) == false)
{
Close();
}
// Open the file
- MD5Summation MD5;
+ Hashes Hash;
{
FileFd Fd(Itm->DestFile,FileFd::WriteAny);
if (_error->PendingError() == true)
FailFd = Fd.Fd();
bool Missing;
- if (Server->Get(File,Fd,Res.ResumePoint,MD5,Missing) == false)
+ if (Server->Get(File,Fd,Res.ResumePoint,Hash,Missing) == false)
{
Fd.Close();
}
Res.LastModified = FailTime;
- Res.MD5Sum = MD5.Result();
+ Res.TakeHashes(Hash);
// Timestamp
struct utimbuf UBuf;
if (getenv("ftp_proxy") != 0)
{
URI Proxy = string(getenv("ftp_proxy"));
+
+ // Run the HTTP method
if (Proxy.Access == "http")
{
// Copy over the environment setting
char S[300];
snprintf(S,sizeof(S),"http_proxy=%s",getenv("ftp_proxy"));
putenv(S);
+ putenv("no_proxy=");
// Run the http method
- string Path = flNotFile(argv[0]) + "/http";
+ string Path = flNotFile(argv[0]) + "http";
execl(Path.c_str(),Path.c_str(),0);
cerr << "Unable to invoke " << Path << endl;
exit(100);
projects / apt.git / blobdiff