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Start adding ability to listen on multiple sockets and to dynamically

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change the set listened on.  There's still some debugging to do but
nothing that worked before is broken.  Also begin to accept unique
prefixes (e.g. g for get) for commands and attributes on the control
port.  Note that relay-related code in comms seems broken now, but is
without this checkin.
This commit is contained in:
ehouse 2007-12-01 15:00:30 +00:00
parent a560c9f8a8
commit 25c4368231
10 changed files with 459 additions and 87 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
xwords4/relay/Makefile
View file

@ -26,6 +26,7 @@ SRC = xwrelay.cpp \
configs.cpp \
crefmgr.cpp \
permid.cpp \
lstnrmgr.cpp \
# STATIC ?= -static

9
xwords4/relay/configs.cpp
View file

@ -63,6 +63,13 @@ RelayConfigs::RelayConfigs( const char* cfile )
parse( cfile );
} /* RelayConfigs::RelayConfigs */
void
RelayConfigs::GetPorts( std::vector<int>::const_iterator* iter, std::vector<int>::const_iterator* end)
{
*iter = m_ports.begin();
*end = m_ports.end();
}
void
RelayConfigs::parse( const char* fname )
{
@ -99,7 +106,7 @@ RelayConfigs::parse( const char* fname )
} else if ( 0 == strcmp( line, "CTLPORT" ) ) {
m_ctrlport = atoi( value );
} else if ( 0 == strcmp( line, "PORT" ) ) {
m_port = atoi( value );
m_ports.push_back( atoi( value ) );
} else if ( 0 == strcmp( line, "NTHREADS" ) ) {
m_nWorkerThreads = atoi( value );
} else if ( 0 == strcmp( line, "SERVERNAME" ) ) {

11
xwords4/relay/configs.h
View file

@ -22,8 +22,11 @@
#define _CONFIGS_H_
#include <string>
#include <vector>
#include "xwrelay_priv.h"
using namespace std;
class RelayConfigs {
public:
@ -32,7 +35,7 @@ class RelayConfigs {
~RelayConfigs() {}
int GetPort() { return m_port; }
void GetPorts( vector<int>::const_iterator* iter, vector<int>::const_iterator* end);
int GetCtrlPort() { return m_ctrlport; }
int GetNWorkerThreads() { return m_nWorkerThreads; }
time_t GetAllConnectedInterval() { return m_allConnInterval; }
@ -49,11 +52,11 @@ class RelayConfigs {
time_t m_allConnInterval;
time_t m_heartbeatInterval;
int m_ctrlport;
int m_port;
vector<int> m_ports;
int m_logLevel;
int m_nWorkerThreads;
std::string m_serverName;
std::string m_idFileName;
string m_serverName;
string m_idFileName;
static RelayConfigs* instance;
};

1
xwords4/relay/cref.h
View file

@ -127,7 +127,6 @@ class CookieRef {
} heart;
struct {
time_t now;
vector<int>* victims;
} htime;
struct {
int socket;

154
xwords4/relay/ctrl.cpp
View file

@ -44,6 +44,7 @@
#include "mlock.h"
#include "xwrelay_priv.h"
#include "configs.h"
#include "lstnrmgr.h"
/* this is *only* for testing. Don't abuse!!!! */
extern pthread_rwlock_t gCookieMapRWLock;
@ -74,6 +75,32 @@ static bool cmd_rev( int socket, const char** args );
static bool cmd_uptime( int socket, const char** args );
static bool cmd_crash( int socket, const char** args );
static int
match( string* cmd, char * const* first, int incr, int count )
{
int cmdlen = cmd->length();
int nFound = 0;
const char* cmdFound = NULL;
int which = -1;
int i;
for ( i = 0; i < count; ++i ) {
logf( XW_LOGINFO, "comparing %s,%s", *first, cmd );
if ( 0 == strncmp( cmd->c_str(), *first, cmdlen ) ) {
++nFound;
which = i;
cmdFound = *first;
}
first = (char* const*)(((char*)first) + incr);
}
if ( nFound == 1 ) {
cmd->assign(cmdFound);
} else {
which = -1;
}
return which;
}
static void
print_to_sock( int sock, bool addCR, const char* what, ... )
{
@ -197,42 +224,88 @@ cmd_kill_eject( int socket, const char** args )
static bool
cmd_get( int socket, const char** args )
{
if ( 0 == strcmp( args[1], "help" ) ) {
print_to_sock( socket, true,
"* %s -- lists all attributes (unimplemented)\n"
"* %s loglevel",
args[0], args[0] );
} else {
const char* attr = args[1];
if ( (NULL != attr) && (0 == strcmp( attr, "loglevel" )) ) {
bool needsHelp = true;
string attr(args[1]);
char* const attrs[] = { "help", "listeners", "loglevel" };
int index = match( &attr, attrs, sizeof(attrs[0]),
sizeof(attrs)/sizeof(attrs[0]));
switch( index ) {
case 0:
break;
case 1: {
char buf[128];
int len = 0;
ListenersIter iter(&g_listeners, false);
for ( ; ; ) {
int listener = iter.next();
if ( listener == -1 ) {
break;
}
len += snprintf( &buf[len], sizeof(buf)-len, "%d,", listener );
}
print_to_sock( socket, true, "%s", buf );
needsHelp = false;
}
break;
case 2: {
RelayConfigs* rc = RelayConfigs::GetConfigs();
if ( NULL != rc ) {
print_to_sock( socket, true, "loglevel=%d\n",
rc->GetLogLevel() );
needsHelp = false;
} else {
logf( XW_LOGERROR, "RelayConfigs::GetConfigs() => NULL" );
}
}
break;
default:
print_to_sock( socket, true, "unknown or ambiguous attribute: %s", attr.c_str() );
}
if ( needsHelp ) {
/* includes help */
print_to_sock( socket, false,
"* %s -- lists all attributes (unimplemented)\n"
"* %s listener\n"
"* %s loglevel\n"
, args[0], args[0], args[0] );
}
return false;
}
} /* cmd_get */
static bool
cmd_set( int socket, const char** args )
{
if ( 0 == strcmp( args[1], "help" ) ) {
print_to_sock( socket, true, "* %s loglevel <n>", args[0] );
} else {
bool needsHelp = true;
if ( 0 == strcmp( args[1], "loglevel" ) ) {
const char* attr = args[1];
const char* val = args[2];
if ( (NULL != attr)
&& (0 == strcmp( attr, "loglevel" ))
&& (NULL != val) ) {
if ( (NULL != attr) && (NULL != val) ) {
RelayConfigs* rc = RelayConfigs::GetConfigs();
if ( rc != NULL ) {
rc->SetLogLevel( atoi(val) );
needsHelp = false;
}
}
} else if ( 0 == strcmp( args[1], "listeners" ) ) {
istringstream str( args[2] );
vector<int> sv;
while ( !str.eof() ) {
int sock;
char comma;
str >> sock >> comma;
logf( XW_LOGERROR, "%s: read %d", __func__, sock );
sv.push_back( sock );
}
g_listeners.SetAll( &sv );
}
if ( needsHelp ) {
print_to_sock( socket, true, "* %s loglevel <n>", args[0] );
}
return false;
}
@ -428,72 +501,53 @@ print_prompt( int socket )
print_to_sock( socket, false, "=> " );
}
static bool
dispatch_command( int sock, const char** args )
{
bool result = false;
const char* cmd = args[0];
const FuncRec* fp = gFuncs;
const FuncRec* last = fp + (sizeof(gFuncs) / sizeof(gFuncs[0]));
while ( fp < last ) {
if ( 0 == strcmp( cmd, fp->name ) ) {
result = (*fp->func)( sock, args );
break;
}
++fp;
}
if ( fp == last ) {
print_to_sock( sock, 1, "unknown command: \"%s\"", cmd );
result = cmd_help( sock, args );
}
return result;
}
static void*
ctrl_thread_main( void* arg )
{
int socket = (int)arg;
int sock = (int)arg;
{
MutexLock ml( &g_ctrlSocksMutex );
g_ctrlSocks.push_back( socket );
g_ctrlSocks.push_back( sock );
}
for ( ; ; ) {
string arg0, arg1, arg2, arg3;
print_prompt( socket );
string cmd, arg1, arg2, arg3;
print_prompt( sock );
char buf[512];
ssize_t nGot = recv( socket, buf, sizeof(buf)-1, 0 );
ssize_t nGot = recv( sock, buf, sizeof(buf)-1, 0 );
if ( nGot <= 1 ) { /* break when just \n comes in */
break;
} else if ( nGot > 2 ) {
/* if nGot is 2, reuse prev string */
buf[nGot] = '\0';
istringstream cmd( buf );
cmd >> arg0 >> arg1 >> arg2 >> arg3;
istringstream s( buf );
s >> cmd >> arg1 >> arg2 >> arg3;
}
int index = match( &cmd, (char*const*)&gFuncs[0].name, sizeof(gFuncs[0]),
sizeof(gFuncs)/sizeof(gFuncs[0]) );
const char* args[] = {
arg0.c_str(),
cmd.c_str(),
arg1.c_str(),
arg2.c_str(),
arg3.c_str()
};
if ( dispatch_command( socket, args ) ) {
if ( index == -1 ) {
print_to_sock( sock, 1, "unknown or ambiguous command: \"%s\"", cmd.c_str() );
(void)cmd_help( sock, args );
} else if ( (*gFuncs[index].func)( sock, args ) ) {
break;
}
}
close ( socket );
close ( sock );
MutexLock ml( &g_ctrlSocksMutex );
vector<int>::iterator iter = g_ctrlSocks.begin();
while ( iter != g_ctrlSocks.end() ) {
if ( *iter == socket ) {
if ( *iter == sock ) {
g_ctrlSocks.erase(iter);
break;
}

203
xwords4/relay/lstnrmgr.cpp Normal file
View file

@ -0,0 +1,203 @@
/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
/*
* Copyright 2007 by Eric House (xwords@eehouse.org). All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <assert.h>
#include "lstnrmgr.h"
#include "mlock.h"
bool
ListenerMgr::AddListener( int port )
{
logf( XW_LOGINFO, "%s(%d)", __func__, port );
MutexLock ml( &m_mutex );
return addOne( port );
}
void
ListenerMgr::SetAll( const vector<int>* ivp )
{
logf( XW_LOGINFO, "%s", __func__ );
MutexLock ml( &m_mutex );
vector<int> have;
map<int,int>::iterator iter2 = m_socks_to_ports.begin();
while ( iter2 != m_socks_to_ports.end() ) {
have.push_back(iter2->second);
++iter2;
}
std::sort(have.begin(), have.end());
vector<int> want = *ivp;
std::sort(want.begin(), want.end());
/* Now go through both lists in order, removing and adding as
appropriate. */
size_t iWant = 0;
size_t iHave = 0;
while ( (iHave < have.size()) || (iWant < want.size()) ) {
assert( iHave <= have.size() && iWant <= want.size() );
while( (iWant < want.size())
&& ((iHave == have.size() || want[iWant] < have[iHave])) ) {
addOne( want[iWant] );
++iWant;
}
while ( (iHave < have.size())
&& (iWant == want.size() || (have[iHave] < want[iWant])) ) {
removePort( have[iHave] );
++iHave;
}
while ( (iHave < have.size()) && (iWant < want.size())
&& (have[iHave] == want[iWant]) ) {
/* keep both */
++iWant; ++iHave;
}
}
} /* SetAll */
/* void */
/* ListenerMgr::RemoveListener( int listener ) */
/* { */
/* MutexLock ml( &m_mutex ); */
/* removeFD( listener ); */
/* } */
void
ListenerMgr::RemoveAll()
{
MutexLock ml( &m_mutex );
for ( ; ; ) {
map<int,int>::const_iterator iter = m_socks_to_ports.begin();
if ( iter == m_socks_to_ports.end() ) {
break;
}
removeSocket( iter->first );
}
}
void
ListenerMgr::AddToFDSet( fd_set* rfds )
{
MutexLock ml( &m_mutex );
map<int,int>::const_iterator iter = m_socks_to_ports.begin();
while ( iter != m_socks_to_ports.end() ) {
FD_SET( iter->first, rfds );
++iter;
}
}
int
ListenerMgr::GetHighest()
{
int highest = 0;
MutexLock ml( &m_mutex );
map<int,int>::const_iterator iter = m_socks_to_ports.begin();
while ( iter != m_socks_to_ports.end() ) {
if ( iter->first > highest ) {
highest = iter->first;
}
++iter;
}
return highest;
}
bool
ListenerMgr::PortInUse( int port )
{
MutexLock ml( &m_mutex );
return portInUse( port );
}
void
ListenerMgr::removeSocket( int sock )
{
/* Assumption: we have the mutex! */
logf( XW_LOGINFO, "%s(%d)", __func__, sock );
map<int,int>::iterator iter = m_socks_to_ports.find( sock );
assert( iter != m_socks_to_ports.end() );
m_socks_to_ports.erase(iter);
close(sock);
}
void
ListenerMgr::removePort( int port )
{
/* Assumption: we have the mutex! */
logf( XW_LOGINFO, "%s(%d)", __func__, port );
map<int,int>::iterator iter = m_socks_to_ports.begin();
while ( iter != m_socks_to_ports.end() ) {
if ( iter->second == port ) {
int sock = iter->first;
close(sock);
m_socks_to_ports.erase(iter);
break;
}
++iter;
}
assert( iter != m_socks_to_ports.end() ); /* we must have found it! */
}
bool
ListenerMgr::addOne( int port )
{
logf( XW_LOGINFO, "%s(%d)", __func__, port );
/* Assumption: we have the mutex! */
assert( !portInUse(port) );
bool success = false;
int sock = make_socket( INADDR_ANY, port );
success = sock != -1;
if ( success ) {
m_socks_to_ports.insert( pair<int,int>(sock, port) );
}
return success;
}
bool
ListenerMgr::portInUse( int port )
{
/* Assumption: we have the mutex! */
bool found = false;
map<int,int>::const_iterator iter = m_socks_to_ports.begin();
while ( iter != m_socks_to_ports.end() ) {
if ( iter->second == port ) {
found = true;
break;
}
++iter;
}
return found;
}
int
ListenersIter::next()
{
int result = -1;
if ( m_iter != m_lm->m_socks_to_ports.end() ) {
result = m_fds? m_iter->first : m_iter->second;
++m_iter;
}
/* logf( XW_LOGINFO, "%s=>%d", __func__, result ); */
return result;
}

73
xwords4/relay/lstnrmgr.h Normal file
View file

@ -0,0 +1,73 @@
/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
/*
* Copyright 2007 by Eric House (xwords@eehouse.org). All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _LSTNRMGR_H_
#define _LSTNRMGR_H_
#include <string>
#include <vector>
#include <map>
#include "xwrelay_priv.h"
using namespace std;
class ListenerMgr {
public:
void RemoveAll();
/* void RemoveListener( int listener ); */
bool AddListener( int port );
void SetAll( const vector<int>* iv ); /* replace current set with this new one */
void AddToFDSet( fd_set* rfds );
int GetHighest();
bool PortInUse( int port );
private:
void removeSocket( int sock );
void removePort( int port );
bool addOne( int listener );
bool portInUse( int port );
map<int,int> m_socks_to_ports;
pthread_mutex_t m_mutex;
friend class ListenersIter;
};
class ListenersIter {
public:
ListenersIter(ListenerMgr* lm, bool fds) {
m_fds = fds;
m_lm = lm;
pthread_mutex_lock( &m_lm->m_mutex );
m_iter = lm->m_socks_to_ports.begin();
}
~ListenersIter() {
pthread_mutex_unlock( &m_lm->m_mutex );
}
int next();
private:
bool m_fds;
map<int,int>::const_iterator m_iter;
ListenerMgr* m_lm;
};
#endif

4
xwords4/relay/xwrelay.conf
View file

@ -15,6 +15,10 @@ ALLCONN=300
NTHREADS=5
# What port do we listen on for incomming connections?
PORT=10997
PORT=10998
PORT=10999
# intentional duplicate for testing
PORT=10999
# And the control port is?

61
xwords4/relay/xwrelay.cpp
View file

@ -71,6 +71,7 @@
#include "configs.h"
#include "timermgr.h"
#include "permid.h"
#include "lstnrmgr.h"
#define LOG_FILE_PATH "./xwrelay.log"
@ -395,7 +396,7 @@ processMessage( unsigned char* buf, int bufLen, int socket )
return success; /* caller defines non-0 as failure */
} /* processMessage */
static int
int
make_socket( unsigned long addr, unsigned short port )
{
int sock = socket( AF_INET, SOCK_STREAM, 0 );
@ -440,7 +441,8 @@ usage( char* arg0 )
fprintf( stderr,
"\t-? (print this help)\\\n"
"\t-c <cport> (localhost port for control console)\\\n"
"\t-d (don't become daemon)\\\n"
"\t-D (don't become daemon)\\\n"
"\t-F (don't fork and wait to respawn child)\\\n"
"\t-f <conffile> (config file)\\\n"
"\t-h (print this help)\\\n"
"\t-i <idfile> (file where next global id stored)\\\n"
@ -452,7 +454,7 @@ usage( char* arg0 )
}
/* sockets that need to be closable from interrupt handler */
int g_listener;
ListenerMgr g_listeners;
int g_control;
void
@ -473,7 +475,7 @@ shutdown()
stop_ctrl_threads();
close( g_listener );
g_listeners.RemoveAll();
close( g_control );
exit( 0 );
@ -519,6 +521,7 @@ int main( int argc, char** argv )
const char* serverName = NULL;
const char* idFileName = NULL;
bool doDaemon = true;
bool doFork = true;
/* Verify sizes here... */
assert( sizeof(CookieID) == 2 );
@ -529,7 +532,7 @@ int main( int argc, char** argv )
first. */
for ( ; ; ) {
int opt = getopt(argc, argv, "h?c:p:n:i:f:t:d" );
int opt = getopt(argc, argv, "h?c:p:n:i:f:t:DF" );
if ( opt == -1 ) {
break;
@ -542,9 +545,12 @@ int main( int argc, char** argv )
case 'c':
ctrlport = atoi( optarg );
break;
case 'd':
case 'D':
doDaemon = false;
break;
case 'F':
doFork = false;
break;
case 'f':
conffile = optarg;
break;
@ -575,9 +581,6 @@ int main( int argc, char** argv )
RelayConfigs::InitConfigs( conffile );
RelayConfigs* cfg = RelayConfigs::GetConfigs();
if ( port == 0 ) {
port = cfg->GetPort();
}
if ( ctrlport == 0 ) {
ctrlport = cfg->GetCtrlPort();
}
@ -621,7 +624,7 @@ int main( int argc, char** argv )
#ifdef SPAWN_SELF
/* loop forever, relaunching children as they die. */
for ( ; ; ) {
while ( doFork ) {
pid_t pid = fork();
if ( pid == 0 ) { /* child */
break;
@ -639,10 +642,21 @@ int main( int argc, char** argv )
prctl( PR_SET_PDEATHSIG, SIGUSR1 );
(void)signal( SIGUSR1, parentDied );
g_listener = make_socket( INADDR_ANY, port );
if ( g_listener == -1 ) {
exit( 1 );
if ( port != 0 ) {
g_listeners.AddListener( port );
}
vector<int>::const_iterator iter, end;
cfg->GetPorts( &iter, &end );
while ( iter != end ) {
int port = *iter;
if ( !g_listeners.PortInUse( port ) ) {
g_listeners.AddListener( port );
} else {
logf( XW_LOGERROR, "port %d was in use", port );
}
++iter;
}
g_control = make_socket( INADDR_LOOPBACK, ctrlport );
if ( g_control == -1 ) {
exit( 1 );
@ -661,10 +675,10 @@ int main( int argc, char** argv )
fd_set rfds;
for ( ; ; ) {
FD_ZERO(&rfds);
FD_SET( g_listener, &rfds );
g_listeners.AddToFDSet( &rfds );
FD_SET( g_control, &rfds );
int highest = g_listener;
if ( g_control > g_listener ) {
int highest = g_listeners.GetHighest();
if ( g_control > highest ) {
highest = g_control;
}
++highest;
@ -675,10 +689,18 @@ int main( int argc, char** argv )
logf( XW_LOGINFO, "errno: %s (%d)", strerror(errno), errno );
}
} else {
if ( FD_ISSET( g_listener, &rfds ) ) {
logf( XW_LOGINFO, "creating ListenersIter" );
ListenersIter iter(&g_listeners, true);
while ( retval > 0 ) {
int listener = iter.next();
if ( listener < 0 ) {
break;
}
if ( FD_ISSET( listener, &rfds ) ) {
struct sockaddr_in newaddr;
socklen_t siz = sizeof(newaddr);
int newSock = accept( g_listener, (sockaddr*)&newaddr, &siz );
int newSock = accept( listener, (sockaddr*)&newaddr, &siz );
logf( XW_LOGINFO, "accepting connection from %s",
inet_ntoa(newaddr.sin_addr) );
@ -686,6 +708,7 @@ int main( int argc, char** argv )
tPool->AddSocket( newSock );
--retval;
}
}
if ( FD_ISSET( g_control, &rfds ) ) {
run_ctrl_thread( g_control );
--retval;
@ -694,7 +717,7 @@ int main( int argc, char** argv )
}
}
close( g_listener );
g_listeners.RemoveAll();
close( g_control );
delete cfg;

5
xwords4/relay/xwrelay_priv.h
View file

@ -4,6 +4,7 @@
#define _XWRELAY_PRIV_H_
#include <time.h>
#include "lstnrmgr.h"
typedef unsigned char HostID;
@ -22,4 +23,8 @@ int send_with_length_unsafe( int socket, unsigned char* buf, int bufLen );
time_t now();
int make_socket( unsigned long addr, unsigned short port );
extern class ListenerMgr g_listeners;
#endif