// -*- mode: C++; tab-width: 4; -*-
// vi:ts=8 sw=4 noexpandtab autoindent
/*
* NetTcpEndPoint
*
* Copyright 1995, 1996, 2011 Perforce Software. All rights reserved.
*
* This file is part of Perforce - the FAST SCM System.
* - previously part of nettcp.cc
*/
# define NEED_ERRNO
# define NEED_SIGNAL
# ifdef OS_NT
# define NEED_FILE
# endif
# define NEED_FCNTL
# define NEED_IOCTL
# define NEED_TYPES
# define NEED_SOCKET_IO
# ifdef OS_MPEIX
# define _SOCKET_SOURCE /* for sys/types.h */
# endif
# include "netportipv6.h" // must be included before stdhdrs.h
# include <stdhdrs.h>
# if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_DARWIN)
# include <sys/un.h>
# endif // OS_LINUX || OS_MACOSX
#include <ctype.h>
# include <error.h>
# include <strbuf.h>
# include "netaddrinfo.h"
# include <bitarray.h>
# include <debug.h>
# include <tunable.h>
# include <keepalive.h>
# include <msgrpc.h>
# include "netportparser.h"
# include "netconnect.h"
# include "netutils.h"
# include "nettcpendpoint.h"
# include "nettcptransport.h"
# include "netselect.h"
# include "netport.h"
# include "netdebug.h"
# include "netsupport.h"
static int one = 1;
/*
* For 2012.1, default hints flags to nothing.
* For 2012.2, perhaps default them to AI_ADDRCONFIG.
*
* AI_ADDRCONFIG suppresses unnecessary AAAA DNS lookups
* from hosts that have no IPv6 connectivity,
* thus preventing long IPv6 stalls for such hosts.
* See RFC 2553 "Basic Socket Interface Extensions for IPv6".
*
* However, AI_ADDRCONFIG also prevents "localhost" (*and* "::1")
* lookups from returning IPv6 addresses if there are no interfaces
* with routable IPv6 addresses; this prevents IPv6 testing in 2012.1
* until we provide IPv6 infrastructure internally.
* In order to support internal testing of IPv6 in 2012.1
* we don't turn this flag on.
*
* In 2012.1 clients must explicitly request an IPv6 connection
* via one of the IPv6 transport prefixes; presumably they won't
* do that at all, as IPv6 support is for internal testing only in 2012.1.
* Therefore, the lack of AI_ADDRCONFIG should not be a problem in 2012.1.
*
* In 2012.2 we could consider changing the default and tcp/ssl transports
* to IPv4+IPv6 and use the system-defined preference (by default, prefer
* IPv6), rather than using our own prefer-v4 or prefer-v6 transport
* prefixes.
* See RFC 3484 "Default Address Selection for Internet Protocol version 6 (IPv6)".
* At the same time we should turn on AI_ADDRCONFIG to prevent stalls when
* trying to connect via IPv6 if the host can't use IPv6. As a convenience,
* we could consider not adding AI_ADDRCONFIG if the requested hostname is
* either "localhost" or "::1" (there's no real need to check for the myriad
* of localhost aliases or of the different ways to write "::1").
*/
static const int kBaseHintsFlags = 0;
/*
* NetTcp utility routines
*/
void
NetTcpEndPoint::SetupSocket( int fd, int ai_family, AddrType type, Error *e )
{
# if defined(F_SETFD) && !defined(OS_NT)
// attempt to set close on exec flag, ignore failures
fcntl(fd, F_SETFD, 1);
# endif
// Set buffer size.
// Turn on misc options:
// REUSEADDR - allows listens while dead connections exist
// REUSEPORT - allows listens while live connections exist (BSD)
// KEEPALIVE - detects dead PCs
// Do these separately: although SO_XXX look like bit flags, they're not.
// AIX just plain chokes sometimes on these, so we don't check.
// Well, we now check, but don't report an error unless DT_NET debugging is enabled.
//
// Don't set SO_REUSEADDR on Windows since it doesn't do what it's
// supposed to. Instead of allowing you to reuse a port within the
// TIME_WAIT period, it allows a process to bind to a port that's
// actively being used by another process. Yuk. The good news
// is that SO_REUSEADDR is not required to rebind within the
// TIME_WAIT period on Windows.
//
int sz;
TYPE_SOCKLEN rsz = sizeof( sz );
const int MinBufSz = p4tunable.Get( P4TUNE_NET_TCPSIZE );
# ifdef SO_SNDBUF
// never reduce the buffer size, so don't set it if we can't get the old value
if( !getsockopt( fd, SOL_SOCKET, SO_SNDBUF, reinterpret_cast<SOCKOPT_T *>(&sz), &rsz ) )
{
if( sz < MinBufSz )
{
sz = MinBufSz;
do_setsockopt( "NetTcpEndPoint", fd, SOL_SOCKET, SO_SNDBUF, reinterpret_cast<SOCKOPT_T *>(&sz), rsz );
}
}
# endif
# ifdef SO_RCVBUF
// never reduce the buffer size, so don't set it if we can't get the old value
if( !getsockopt( fd, SOL_SOCKET, SO_RCVBUF, reinterpret_cast<SOCKOPT_T *>(&sz), &rsz ) )
{
if( sz < MinBufSz )
{
sz = MinBufSz;
do_setsockopt( "NetTcpEndPoint", fd, SOL_SOCKET, SO_RCVBUF, reinterpret_cast<SOCKOPT_T *>(&sz), rsz );
}
}
# endif
# if defined( SO_REUSEADDR ) && !defined( OS_NT )
if( (type == AT_LISTEN) || (type == AT_CHECK) )
{
do_setsockopt( "NetTcpEndPoint", fd, SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<SOCKOPT_T *>(&one), rsz );
}
# endif
# ifdef SO_REUSEPORT
const int reuseport = p4tunable.Get( P4TUNE_NET_REUSEPORT );
if( ((type == AT_LISTEN) || (type == AT_CHECK)) && reuseport )
{
do_setsockopt( "NetTcpEndPoint", fd, SOL_SOCKET, SO_REUSEPORT, reinterpret_cast<SOCKOPT_T *>(&one), rsz );
}
# endif
# if defined(IPV6_V6ONLY) && !defined(OS_MINGW) && (!defined(_MSC_VER) || (_MSC_VER >= 1400))
/*
* We allow the IPV6_V6ONLY sockopt on Windows only when building on VS 2005 or above,
* but we support only VS 2008 and later.
*
* RFC 3493 says that by default IPv6 sockets accept IPv4 connection requests.
* However, on Windows Vista and later the default is that they don't accept
* IPv4 connections. Rather than #ifdef the defaults for all the platforms
* (and track them when they change their defaults), we don't rely on the default
* and always set this option appropriately.
*
* Note that it makes no sense to try to configure an IPv4 socket either to be
* IPV6-only or to be IPV6-and-IPV4, so we set it only on IPv6 sockets.
* Most dual-stack implementations seem to allow its use on IPv4 sockets,
* but it seems silly, so we don't do it.
*
* However, only dual-stack implementations provide this call, so we are #ifdef'ed
* on IPV6_V6ONLY.
*/
// don't try to set IPV6_V6ONLY on a v4 socket
if( (type == AT_LISTEN) && (ai_family == AF_INET6) )
{
const int val = GetPortParser().MustIPv6();
TRANSPORT_PRINTF( DEBUG_CONNECT, "NetTcpEndPoint setsockopt(IPV6_V6ONLY, %d)", val )
// this will fail harmlessly on Windows XP (but only if it passes the #ifdef test)
do_setsockopt( "NetTcpEndPoint", fd, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const SOCKOPT_T *>(&val), sizeof(val) );
}
# endif
MoreSocketSetup( fd, type, e ); // for subclasses to add extra behavior
}
// subclasses can do more setup here, if desired
void
NetTcpEndPoint::MoreSocketSetup( int fd, AddrType type, Error *e )
{
}
int
NetTcpEndPoint::CreateSocket(
AddrType type,
const NetAddrInfo &ai,
int af_target,
bool useAlternate,
Error *e )
{
int fd = -1;
// iterate through the address list and use the first of the correct address family
for( const addrinfo *aip = ai.begin(); aip != ai.end(); aip = aip->ai_next )
{
if( useAlternate && (af_target == AF_UNSPEC) && (aip == ai.begin()) )
{
/*
* If we are to use an alternate address then try the first
* address that isn't the same family as the first entry.
* For RFC 3484 we try addresses in returned order,
* but only the first address (if any) of each family.
* If useAlternate was true then we must already have
* tried the first entry, so skip it now.
*/
af_target = (aip->ai_family == AF_INET) ? AF_INET6 : AF_INET;
continue;
}
// don't discard any responses if no preference was given
if( (AF_UNSPEC != af_target) && (aip->ai_family != af_target) )
continue;
if( DEBUG_CONNECT )
{
StrBuf addr;
NetUtils::GetAddress( aip->ai_family, aip->ai_addr, RAF_PORT, addr );
TRANSPORT_PRINTF( DEBUG_CONNECT, "NetTcpEndPoint try socket(%d, %d, %d, %s)",
aip->ai_family, aip->ai_socktype, aip->ai_protocol, addr.Text() );
}
fd = ::socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
if( fd == -1 )
{
// odd ... probably either EACCES or ENFILE
e->Net( "socket", "create" );
if( DEBUG_CONNECT )
{
StrBuf errnum;
Error::StrNetError( errnum );
TRANSPORT_PRINTF( DEBUG_CONNECT, "NetTcpEndPoint socket(%d, %d, %d) failed, error = %s",
aip->ai_family, aip->ai_socktype, aip->ai_protocol, errnum.Text() );
}
//continue; // uncomment to try all addresses in this family
}
else
{
SetupSocket( fd, aip->ai_family, type, e );
int result; // the result of the connect or bind
const char *op4; // the name of the IPv4 operation ["connect" or "connect (IPv6)"]
const char *op6; // the name of the IPv6 operation ["bind" or "bind (IPv6)"]
switch( type )
{
case AT_CONNECT:
result = connect( fd, aip->ai_addr, aip->ai_addrlen );
op4 = "connect";
op6 = "connect (IPv6)";
break;
case AT_CHECK:
case AT_LISTEN:
result = bind( fd, aip->ai_addr, aip->ai_addrlen );
op4 = "bind";
op6 = "bind (IPv6)";
break;
}
// did the connect/bind fail?
if( result == -1 )
{
// preserve/restore the listen error across the GetAddress call
int err = Error::GetNetError();
StrBuf addrBuf;
NetUtils::GetAddress( aip->ai_family, aip->ai_addr, RAF_PORT, addrBuf );
Error::SetNetError(err); // restore the "last" error
// use different error ids/args for IPv4 and IPv6 so the correct address arg is output
if( aip->ai_family == AF_INET6 )
e->Net2( op6, addrBuf.Text() );
else
e->Net( op4, addrBuf.Text() );
NET_CLOSE_SOCKET( fd );
return -1;
}
}
break;
}
return fd;
}
/**
* return true if we resolved the address, false otherwise
*/
bool
NetTcpEndPoint::GetAddrInfo( AddrType type, NetAddrInfo &ai, Error *e )
{
StrBuf port = ai.Port();
StrBuf host = ai.Host();
StrBuf hostPort = "[";
hostPort.Append( &host );
hostPort.Append( "]:" );
hostPort.Append( &port );
e->Clear();
if( port.IsNumeric() )
{
int portAsInt = port.Atoi();
if( portAsInt < 0 || portAsInt >= 65536 )
{
e->Set( MsgRpc::TcpPortInvalid ) << port;
return false;
}
}
NetPortParser &pp = GetPortParser();
int ai_family = pp.MustIPv4() ? AF_INET : (pp.MustIPv6() ? AF_INET6 : AF_UNSPEC);
int ai_flags = kBaseHintsFlags | AI_ALL | (pp.WantIPv6() ? 0 : AI_ADDRCONFIG );
ai.SetHintsFamily( ai_family );
// set AI_PASSIVE to get IPv4 addresses mapped in IPv6 if host isn't specified
if( type != AT_CONNECT )
{
ai_flags |= AI_PASSIVE;
if( pp.MayIPv4() && pp.MayIPv6() )
{
ai_flags |= AI_V4MAPPED;
}
}
if( DEBUG_CONNECT )
{
p4debug.printf( "NetTcpEndPoint::GetAddrInfo(port=%s, family=%d, flags=0x%x)\n",
hostPort.Text(), ai_family, ai_flags );
}
ai.SetHintsFlags( ai_flags );
bool result = ai.GetInfo(e); // resolve the host and service/port names (IPv4 and/or IPv6)
if( !result )
{
if( ai.GetStatus() == EAI_BADFLAGS )
{
/*
* Apparently our OS doesn't support AI_ALL or AI_V4MAPPED.
* Maybe it's a single-stack server:
* FreeBSD 7.0 or older
* Windows XP or older
* ...
* We'll try again without those flags.
*/
ai_flags = kBaseHintsFlags | (pp.WantIPv6() ? 0 : AI_ADDRCONFIG )
| ( (type == AT_CONNECT) ? 0 : AI_PASSIVE );
ai.SetHintsFlags( ai_flags );
TRANSPORT_PRINTF( DEBUG_CONNECT,
"NetTcpEndPoint::GetAddrInfo(port=%s, family=%d, flags=0x%x) [retry]",
hostPort.Text(), ai_family, ai_flags );
e->Clear();
result = ai.GetInfo(e);
}
}
if( !result )
{
// job062842 -- allow local operation without a routable address
if( (ai.GetStatus() == EAI_NONAME) && (ai_flags & AI_ADDRCONFIG) )
{
/*
* Perhaps we don't have a routable address and are trying
* to run locally. Try again without AI_ADDRCONFIG.
*/
ai_flags &= ~AI_ADDRCONFIG;
ai.SetHintsFlags( ai_flags );
TRANSPORT_PRINTF( DEBUG_CONNECT,
"NetTcpEndPoint::GetAddrInfo(port=%s, family=%d, flags=0x%x) [retry-2]",
hostPort.Text(), ai_family, ai_flags );
e->Clear();
result = ai.GetInfo(e);
}
}
return result;
}
int
NetTcpEndPoint::BindOrConnect( AddrType type, struct Error *e )
{
int fd = -1;
// first setup an addrinfo from the parsed P4PORT {transport, host, port} tuple
NetPortParser &pp = GetPortParser();
StrBuf host = pp.Host();
StrBuf port = pp.Port();
// ListenCheck is passed "host" or "host:port"
if( type == AT_CHECK )
{
/*
* We're called with AT_CHECK only from ListenCheck(),
* which just wants to ensure that we can bind to the
* provided address.
*/
// NetPortParser assumes "host:port" or just "port"
if( host.Length() == 0 )
host.Set( pp.HostPort() );
/*
* Don't bind to a specific port; we care about the host address
* for this check, not the port, and another service might be
* running on the licensed port. We don't want to get an
* EADDRINUSE error just because the port is in use.
*/
port.Set( "" );
}
else
{
// check that the address specifies a port
// only if we're not checking the license
if( !pp.IsValid(e) )
return -1;
}
NetAddrInfo ai( host, port );
if( !GetAddrInfo(type, ai, e) )
{
// give up if we didn't succeed in resolving the address
return -1;
}
// now create a socket of the appropriate address family
/*
* In 2012.1 we interpret "tcp:" and "ssl:" to mean IPv4
* so that we don't break existing licenses and protects tables.
*
* Note that if the server specifies "tcp6:" or "ssl6:"
* then they are explicitly rejecting IPv4. Because "tcp:" and "ssl:"
* means IPv4 then the user must use "tcp46:" or "tcp64:" (or the ssl
* equivalents) to specify "either IPv4 or IPv6". The first of "4"
* or "6" is the preferred transport.
*
* IPv6 will also work for IPv4 connections (transport only until
* 2012.2), except for servers on single-stack OSes: Windows XP or
* FreeBSD 7.0 or earlier.
* Using "tcp64:" or "ssl64:" on those servers won't provide
* IPv4-mapped-in-IPv6.
*/
bool rfc3484 = pp.MustRfc3484();
int af_target = rfc3484 ? AF_UNSPEC
: (pp.PreferIPv6() ? AF_INET6 : AF_INET);
/*
* RFC 3484 specifies a precedence for deciding the order of returned
* addresses to be used for connect/bind. If we're following RFC 3484
* then we won't also apply our coarse IPv4-first or IPv6-first ordering.
* If we aren't following RFC 3484 then we'll still use the intra-family
* order provided by getaddrinfo.
*
* In 2012.1, NetPortParser.MustRfc3484() will always return false,
* but in 2013.1 and later it will return the value of "-v net.rfc3484"
* if the transport didn't specify an IPv4 or IPv6 preference (via
* transport prefix or numeric address).
*/
fd = CreateSocket( type, ai, af_target, false, e );
if( fd == -1 )
{
// didn't get a socket the first time; try again
if( rfc3484 )
{
// try the first address of the other family
fd = CreateSocket( type, ai, af_target, true, e );
}
else
{
/*
* If we tried and failed to get a socket of our preferred family,
* try to get a socket of an acceptable alternate family.
* The "else" clause handles IPv6-only hosts, as well as
* connect attempts to hosts that are reachable only via IPv6,
* when the preferred transport is IPv4 (currently IPv4-only is
* the default).
*/
if( (af_target == AF_INET6) && pp.MayIPv4() ) // "tcp64:" or "ssl64:"
fd = CreateSocket( type, ai, AF_INET, false, e );
else if( (af_target == AF_INET) && pp.MayIPv6() ) // "tcp46:" or "ssl46:"
fd = CreateSocket( type, ai, AF_INET6, false, e );
}
}
if( fd == -1 )
{
// failed to get a socket and/or bind/connect
return -1;
}
// finally, setup the socket options and return it
e->Clear(); // because the first CreateSocket() might have set an error
return fd;
}
/*
* NetTcpEndPoint
*/
NetTcpEndPoint::NetTcpEndPoint( Error *e )
{
s = -1;
/*
* Initialize as "false" so client side of connection:
* !isFromClient == isToServer
* Will be set to true if "listen" is invoked.
*/
isAccepted = false;
int err = NetUtils::InitNetwork();
if( err )
{
StrNum errnum( err );
e->Net( "Network initialization failure", errnum.Text() );
}
}
NetTcpEndPoint::~NetTcpEndPoint()
{
Unlisten();
NetUtils::CleanupNetwork();
}
void
NetTcpEndPoint::Listen( Error *e )
{
const int backlog = p4tunable.Get( P4TUNE_NET_BACKLOG );
isAccepted = true;
if( ( s = BindOrConnect( AT_LISTEN, e ) ) < 0 )
{
e->Set( MsgRpc::TcpListen ) << GetPortParser().HostPort();
return;
}
// Now listen
if( listen( s, backlog ) < 0 )
{
e->Net( "listen", GetPortParser().String().Text() );
StrBuf listenAddress;
GetListenAddress( s, RAF_PORT, listenAddress );
NET_CLOSE_SOCKET( s );
e->Set( MsgRpc::TcpListen ) << listenAddress;
}
# ifdef SIGPIPE
signal( SIGPIPE, SIG_IGN );
# endif
if( DEBUG_CONNECT )
{
StrBuf listenAddress;
GetListenAddress( s, RAF_PORT, listenAddress );
TRANSPORT_PRINTF( DEBUG_CONNECT, "NetTcpEndPoint %s listening",
listenAddress.Text() );
}
}
/**
* Return the first addrinfo pointer of the desired family;
* return NULL if none.
*/
const addrinfo *
NetTcpEndPoint::GetMatchingAddrInfo(
const NetAddrInfo &ai,
int af_target,
bool useAlternate)
{
// iterate through the address list and use the first of the correct address family
for( const addrinfo *aip = ai.begin(); aip != ai.end(); aip = aip->ai_next )
{
if( useAlternate && (af_target == AF_UNSPEC) && (aip == ai.begin()) )
{
/*
* If we are to use an alternate address then try the first
* address that isn't the same family as the first entry.
* For RFC 3484 we try addresses in returned order,
* but only the first address (if any) of each family.
* If useAlternate was true then we must already have
* tried the first entry, so skip it now.
*/
af_target = (aip->ai_family == AF_INET) ? AF_INET6 : AF_INET;
continue;
}
if( (AF_UNSPEC == af_target) || (aip->ai_family == af_target) )
return aip;
}
return NULL;
}
/**
* "requestedPort" is the P4PORT (or the command-line "-p") string.
* The "this" NetTcpEndPoint object was constructed using the
* address[:port] in the license file.
*/
int
NetTcpEndPoint::CheaterCheck( const char *requestedPort )
{
Error e;
NetPortParser &ppLicensed = GetPortParser();
StrBuf ppLicHost = ppLicensed.Host();
StrBuf ppLicPort = ppLicensed.Port();
NetPortParser ppRequested( requestedPort );
if( !ppRequested.IsValid( &e ) )
return 1;
// no host? then we were created with just a host, not a port
if( ppLicHost.Length() == 0 )
{
ppLicHost.Set( ppLicensed.Port() );
ppLicPort.Set( "" );
}
// We already called BindOrConnect() once from ListenCheck() and there
// wasn't an error then, so there shouldn't be one now.
NetAddrInfo ai( ppLicHost, ppLicPort );
// see the comments in BindOrConnect about RFC 3484 compliance
bool rfc3484 = ppLicensed.MustRfc3484();
int af_target = rfc3484 ? AF_UNSPEC
: (ppLicensed.PreferIPv6() ? AF_INET6 : AF_INET);
if( !GetAddrInfo(AT_CHECK, ai, &e) )
{
return 1;
}
// get the addrinfo that we would use if we were to listen
const addrinfo *aip = GetMatchingAddrInfo( ai, af_target, false );
if( aip == NULL )
{
if( rfc3484 )
{
// try the first address of the other family
// pointless, really, but matches the BindOrConnect logic
aip = GetMatchingAddrInfo( ai, AF_UNSPEC, true );
}
else
{
if( (af_target == AF_INET6) && ppLicensed.MayIPv4() )
aip = GetMatchingAddrInfo( ai, AF_INET, false );
else if( (af_target == AF_INET) && ppLicensed.MayIPv6() )
aip = GetMatchingAddrInfo( ai, AF_INET6, false );
}
}
if( aip == NULL )
{
// no acceptable address
return 1;
}
// Are they trying to start the server on a port other than
// the licensed one ???
int myPort = NetUtils::GetInPort( aip->ai_addr );
if( myPort == -1 )
{
// bad address family -- shouldn't happen
return 1;
}
// If the license file has an ip address but no port number we
// must still allow this.
unsigned short requestedPortNum = ppRequested.PortNum();
if( (myPort == 0) || (myPort == requestedPortNum) )
{
return 0;
}
return 1;
}
/*
* Check whether a hostname or IP is loopback
* - return true if any addresses for the host is local
* 1) p4portstr is a P4PORT string
* 2) empty strings, and those with a transport of "rsh:" or "jsh:" are local
* 3) empty host portion is also local
* 4) numeric strings (IPv4 or IPv6, optionally surrounded with [...])
* are parsed and checked by NetUtils::IsLocalAddress()
* 5) otherwise we resolve the name to a set of addresses;
* if any of them are local, return true
* - there is a lot of code here that's duplicated from BindOrConnect()
* and CreateSocket(), so I'll look at refactoring this later.
* [static]
*/
bool
NetTcpEndPoint::IsLocalHost( const char *p4portstr, AddrType type )
{
// empty host string means localhost
if( *p4portstr == '\0' )
return true;
NetPortParser pp(p4portstr);
// "rsh:" and "jsh:" are always local
if( pp.MustRSH() || pp.MustJSH() )
return true;
// empty host portion means localhost
if( pp.Host().Length() == 0 )
return true;
// don't bother trying to resolve a numeric address
// note: dns names may start with a digit (see RFC 1123)
char ch = pp.Host().Text()[0];
if( ch == ':' )
return NetUtils::IsLocalAddress( pp.Host().Text() );
char lastch = pp.Host().Text()[pp.Host().Length()-1];
if( (ch == '[') && (lastch == ']') )
{
if( pp.Host().Text()[1] == ':' )
return NetUtils::IsLocalAddress( pp.Host().Text() );
}
// ok, let's try resolving the name
NetAddrInfo ai( pp.Host(), pp.Port() );
Error e;
bool useAlternate = false;
int af_target = AF_UNSPEC;
int ai_family = pp.MustIPv4() ? AF_INET : (pp.MustIPv6() ? AF_INET6 : AF_UNSPEC);
int ai_flags = kBaseHintsFlags | AI_ALL | (pp.WantIPv6() ? 0 : AI_ADDRCONFIG );
ai.SetHintsFamily( ai_family );
// set AI_PASSIVE to get IPv4 addresses mapped in IPv6 if host isn't specified
if( type != AT_CONNECT )
{
ai_flags |= AI_PASSIVE;
if( pp.MayIPv4() && pp.MayIPv6() )
{
ai_flags |= AI_V4MAPPED;
}
}
if( DEBUG_CONNECT )
{
p4debug.printf( "NetTcpEndPoint::IsLocalHost(port=%s, family=%d, flags=0x%x)\n",
pp.Host().Text(), ai_family, ai_flags );
}
ai.SetHintsFlags( ai_flags );
// This will init WinSock, if required, and clean it up too.
NetTcpEndPoint endpoint( &e );
bool result = ai.GetInfo(&e); // resolve the host and service/port names (IPv4 and/or IPv6)
if( !result )
{
if( ai.GetStatus() == EAI_BADFLAGS )
{
/*
* Apparently our OS doesn't support AI_ALL or AI_V4MAPPED.
* Maybe it's a single-stack server:
* FreeBSD 7.0 or older
* Windows XP or older
* ...
* We'll try again without those flags.
*/
ai_flags = kBaseHintsFlags | (pp.WantIPv6() ? 0 : AI_ADDRCONFIG )
| ( (type == AT_CONNECT) ? 0 : AI_PASSIVE );
ai.SetHintsFlags( ai_flags );
if( DEBUG_CONNECT )
{
p4debug.printf(
"NetTcpEndPoint::IsLocalHost(port=%s, family=%d, flags=0x%x) [retry]\n",
pp.Host().Text(), ai_family, ai_flags );
}
e.Clear();
result = ai.GetInfo(&e);
}
}
if( !result )
{
// job062842 -- allow local operation without a routable address
if( (ai.GetStatus() == EAI_NONAME) && (ai_flags & AI_ADDRCONFIG) )
{
/*
* Perhaps we don't have a routable address and are trying
* to run locally. Try again without AI_ADDRCONFIG.
*/
ai_flags &= ~AI_ADDRCONFIG;
ai.SetHintsFlags( ai_flags );
if( DEBUG_CONNECT )
{
p4debug.printf(
"NetTcpEndPoint::IsLocalHost(port=%s, family=%d, flags=0x%x) [retry-2]\n",
pp.Host().Text(), ai_family, ai_flags );
}
e.Clear();
result = ai.GetInfo(&e);
}
}
if( result )
{
// iterate through the address list and use the first of the correct address family
for( const addrinfo *aip = ai.begin(); aip != ai.end(); aip = aip->ai_next )
{
if( useAlternate && (af_target == AF_UNSPEC) && (aip == ai.begin()) )
{
/*
* If we are to use an alternate address then try the first
* address that isn't the same family as the first entry.
* For RFC 3484 we try addresses in returned order,
* but only the first address (if any) of each family.
* If useAlternate was true then we must already have
* tried the first entry, so skip it now.
*/
af_target = (aip->ai_family == AF_INET) ? AF_INET6 : AF_INET;
continue;
}
// don't discard any responses if no preference was given
if( (AF_UNSPEC != af_target) && (aip->ai_family != af_target) )
continue;
StrBuf printableAddress;
printableAddress.Clear();
printableAddress.Alloc( P4_INET6_ADDRSTRLEN );
printableAddress.SetLength(0);
printableAddress.Terminate();
const char *buf = printableAddress.Text();
NetUtils::GetAddress( aip->ai_family, aip->ai_addr, 0, printableAddress );
result = NetUtils::IsLocalAddress(buf);
if( DEBUG_CONNECT )
{
p4debug.printf(
"NetTcpEndPoint::IsLocalAddress(%s) = %s\n",
buf, (result ? "true" : "false") );
}
if( result )
return true;
}
}
return false;
}
void
NetTcpEndPoint::ListenCheck( Error *e )
{
int fd = BindOrConnect( AT_CHECK, e );
if( fd >= 0 )
{
close( fd );
}
}
void
NetTcpEndPoint::GetListenAddress( int s, int raf_flags, StrBuf &listenAddress )
{
struct sockaddr_storage addr;
struct sockaddr *saddrp = reinterpret_cast<struct sockaddr *>(&addr);
TYPE_SOCKLEN addrlen = sizeof addr;
if( getsockname( s, saddrp, &addrlen ) < 0 || addrlen > sizeof addr )
{
listenAddress.Set( "unknown" );
}
else
{
NetUtils::GetAddress( addr.ss_family, saddrp, raf_flags, listenAddress );
}
}
StrPtr *
NetTcpEndPoint::GetHost()
{
ipAddr = GetPortParser().Host();
return &ipAddr;
}
/*
* job063713 -- ensure that IPv6 literal addresses are in our
* standard form, per RFC 3986 : surrounded with brackets
* - matches the behavior of NetUtils::GetAddress()
*/
StrBuf
NetTcpEndPoint::GetPrintableHost()
{
StrPtr host = GetPortParser().Host();
if( (host[0] != '[') && NetUtils::IsIpV6Address(host.Text()) )
{
StrBuf tmp = "[";
tmp.Append( host.Text() );
tmp.Append( "]" );
return tmp;
}
return host;
}
void
NetTcpEndPoint::Unlisten()
{
NET_CLOSE_SOCKET( s );
}
NetTransport *
NetTcpEndPoint::Accept( KeepAlive *keep, Error *e )
{
TYPE_SOCKLEN lpeer;
struct sockaddr_storage peer;
int t, rd, wr;
NetTcpSelector *selector = NULL;
TRANSPORT_PRINTF( DEBUG_CONNECT, "NetTcpEndpoint accept on %d", s );
lpeer = sizeof peer;
if( keep )
selector = new NetTcpSelector( s );
rd = wr = 0;
// Loop accepting, as it gets interrupted (by SIGCHILD) on
// some platforms (MachTen, but not FreeBSD).
for( ;; )
{
if( keep )
{
if( !keep->IsAlive() )
{
e->Set( MsgRpc::Break );
delete selector;
return 0;
}
rd = 1;
int sr;
if( ( sr = selector->Select( rd, wr, 500 ) ) == 0 )
continue;
if( sr == -1 )
{
e->Sys( "select", "accept" );
delete selector;
return 0;
}
}
if( ( t = accept( s, reinterpret_cast<struct sockaddr *>(&peer), &lpeer ) ) < 0 )
{
if( errno != EINTR )
{
e->Net( "accept", "socket" );
e->Set( MsgRpc::TcpAccept );;
delete selector;
return 0;
}
}
else break;
}
# ifdef F_SETFD
// close on exec
// so p4web's launched processes don't get our socket
fcntl( t, F_SETFD, 1 );
# endif
delete selector;
NetTcpTransport *transport = new NetTcpTransport( t, true );
if( transport )
transport->SetPortParser(GetPortParser());
return transport;
}
NetTransport *
NetTcpEndPoint::Connect( Error *e )
{
int t;
// Set up addresses
if( ( t = BindOrConnect( AT_CONNECT, e ) ) < 0 )
{
e->Set( MsgRpc::TcpConnect ) << GetPortParser().HostPort();
return 0;
}
TRANSPORT_PRINTF( DEBUG_CONNECT, "NetTcpEndpoint connect on %d", t );
# ifdef SIGPIPE
signal( SIGPIPE, SIG_IGN );
# endif
NetTcpTransport *transport = new NetTcpTransport( t, false );
if( transport )
transport->SetPortParser(GetPortParser());
return transport;
}
# if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_DARWIN)
// returns -1 or error or a valid socket fd on success
socketfd_t
NetTcpEndPoint::OpenUnixSocket( const StrBuf &sockName, Error &e )
{
//NET_ENTER();
struct sockaddr_un sockAddr;
socketfd_t sock = -1;
int count = 1;
StrBuf buf;
//TRANSPORT_PRINTF( DEBUG_CONNECT, "OpenUnixSocket socket filename is: \"%s\"",
// sockName.Text() );
// Verify that we have gotten the filename for the socket
if ( sockName.Length() == 0 )
{
e.Set(MsgRpc::UnixDomainOpen) << "open" << "invalid filename";
//NET_DUMP_ERROR( e );
return -1;
}
sock = socket( PF_UNIX, SOCK_STREAM, 0 );
if( sock < 0 )
{
StrBuf buf;
Error::StrError(buf);
e.Set(MsgRpc::UnixDomainOpen) << "socket" << buf;
//NET_DUMP_ERROR( e );
return -1;
}
memset( &sockAddr, 0, sizeof(struct sockaddr_un) );
sockAddr.sun_family = AF_UNIX;
memcpy( sockAddr.sun_path,
sockName.Text(),
sockName.Length() );
sockAddr.sun_path[ sockName.Length() ] = '\0';
//TRANSPORT_PRINTF( DEBUG_CONNECT, "OpenUnixSocket socket filename is: \"%s\"",
// sockName.Text() );
while( connect( sock,
(struct sockaddr *) &sockAddr,
sizeof(struct sockaddr_un) ) != 0 && (count++ < 10))
{
if( errno == ECONNREFUSED || errno == ENOENT )
{
sleep(1);
continue;
}
Error::StrError(buf);
e.Set(MsgRpc::UnixDomainOpen) << "connect" << buf;
//NET_DUMP_ERROR( e );
return -1;
}
if( count >= 10 )
{
Error::StrError(buf);
e.Set(MsgRpc::UnixDomainOpen) << "connect" << buf;
//NET_DUMP_ERROR( e );
return -1;
}
return sock;
}
# endif // OS_LINUX || OS_MACOSX || OS_DARWIN