openldap/servers/slapd/connection.c

1185 lines
26 KiB
C

/* $OpenLDAP$ */
/*
* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <limits.h>
#include <ac/socket.h>
#include <ac/errno.h>
#include <ac/signal.h>
#include <ac/string.h>
#include <ac/time.h>
#include "slap.h"
/* protected by connections_mutex */
static ldap_pvt_thread_mutex_t connections_mutex;
static Connection *connections = NULL;
static unsigned long conn_nextid = 0;
/* structure state (protected by connections_mutex) */
#define SLAP_C_UNINITIALIZED 0x00 /* MUST BE ZERO (0) */
#define SLAP_C_UNUSED 0x01
#define SLAP_C_USED 0x02
/* connection state (protected by c_mutex ) */
#define SLAP_C_INVALID 0x00 /* MUST BE ZERO (0) */
#define SLAP_C_INACTIVE 0x01 /* zero threads */
#define SLAP_C_ACTIVE 0x02 /* one or more threads */
#define SLAP_C_BINDING 0x03 /* binding */
#define SLAP_C_CLOSING 0x04 /* closing */
const char *
connection_state2str( int state )
{
switch( state ) {
case SLAP_C_INVALID: return "!";
case SLAP_C_INACTIVE: return "|";
case SLAP_C_ACTIVE: return "";
case SLAP_C_BINDING: return "B";
case SLAP_C_CLOSING: return "C";
}
return "?";
}
static Connection* connection_get( ber_socket_t s );
static int connection_input( Connection *c );
static void connection_close( Connection *c );
static int connection_op_activate( Connection *conn, Operation *op );
static int connection_resched( Connection *conn );
static void connection_abandon( Connection *conn );
static void connection_destroy( Connection *c );
struct co_arg {
Connection *co_conn;
Operation *co_op;
};
/*
* Initialize connection management infrastructure.
*/
int connections_init(void)
{
assert( connections == NULL );
if( connections != NULL) {
Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
0, 0, 0 );
return -1;
}
/* should check return of every call */
ldap_pvt_thread_mutex_init( &connections_mutex );
connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
if( connections == NULL ) {
Debug( LDAP_DEBUG_ANY,
"connections_init: allocation (%d*%ld) of connection array failed\n",
dtblsize, (long) sizeof(Connection), 0 );
return -1;
}
assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
/*
* per entry initialization of the Connection array initialization
* will be done by connection_init()
*/
return 0;
}
/*
* Destroy connection management infrastructure.
*/
int connections_destroy(void)
{
ber_socket_t i;
/* should check return of every call */
if( connections == NULL) {
Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
0, 0, 0 );
return -1;
}
for ( i = 0; i < dtblsize; i++ ) {
if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
ber_sockbuf_free( connections[i].c_sb );
ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
}
}
free( connections );
connections = NULL;
ldap_pvt_thread_mutex_destroy( &connections_mutex );
return 0;
}
/*
* shutdown all connections
*/
int connections_shutdown(void)
{
ber_socket_t i;
ldap_pvt_thread_mutex_lock( &connections_mutex );
for ( i = 0; i < dtblsize; i++ ) {
if( connections[i].c_struct_state != SLAP_C_USED ) {
continue;
}
ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
/* connections_mutex and c_mutex are locked */
connection_closing( &connections[i] );
connection_close( &connections[i] );
ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
}
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return 0;
}
/*
* Timeout idle connections.
*/
int connections_timeout_idle(time_t now)
{
int i = 0;
int connindex;
Connection* c;
ldap_pvt_thread_mutex_lock( &connections_mutex );
for( c = connection_first( &connindex );
c != NULL;
c = connection_next( c, &connindex ) )
{
if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
/* close it */
connection_closing( c );
connection_close( c );
i++;
}
}
connection_done( c );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return i;
}
static Connection* connection_get( ber_socket_t s )
{
/* connections_mutex should be locked by caller */
Connection *c;
Debug( LDAP_DEBUG_ARGS,
"connection_get(%ld)\n",
(long) s, 0, 0 );
assert( connections != NULL );
if(s == AC_SOCKET_INVALID) {
return NULL;
}
#ifndef HAVE_WINSOCK
c = &connections[s];
assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
#else
c = NULL;
{
ber_socket_t i, sd;
for(i=0; i<dtblsize; i++) {
ber_sockbuf_ctrl( connections[i].c_sb,
LBER_SB_OPT_GET_FD, &sd );
if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
assert( connections[i].c_conn_state == SLAP_C_INVALID );
assert( connections[i].c_sb == 0 );
break;
}
if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
assert( connections[i].c_conn_state == SLAP_C_INVALID );
assert( sd == AC_SOCKET_INVALID );
continue;
}
/* state can actually change from used -> unused by resched,
* so don't assert details here.
*/
if( sd == s ) {
c = &connections[i];
break;
}
}
}
#endif
if( c != NULL ) {
ber_socket_t sd;
ldap_pvt_thread_mutex_lock( &c->c_mutex );
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
if( c->c_struct_state != SLAP_C_USED ) {
/* connection must have been closed due to resched */
assert( c->c_conn_state == SLAP_C_INVALID );
assert( sd == AC_SOCKET_INVALID );
Debug( LDAP_DEBUG_TRACE,
"connection_get(%d): connection not used\n",
s, 0, 0 );
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
return NULL;
}
Debug( LDAP_DEBUG_TRACE,
"connection_get(%d): got connid=%ld\n",
s, c->c_connid, 0 );
c->c_n_get++;
assert( c->c_struct_state == SLAP_C_USED );
assert( c->c_conn_state != SLAP_C_INVALID );
assert( sd != AC_SOCKET_INVALID );
c->c_activitytime = slap_get_time();
}
return c;
}
static void connection_return( Connection *c )
{
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}
long connection_init(
ber_socket_t s,
const char* url,
const char* dnsname,
const char* peername,
const char* sockname,
int use_tls,
unsigned ssf,
char *authid )
{
unsigned long id;
Connection *c;
assert( connections != NULL );
assert( dnsname != NULL );
assert( peername != NULL );
assert( sockname != NULL );
#ifndef HAVE_TLS
assert( !use_tls );
#endif
if( s == AC_SOCKET_INVALID ) {
Debug( LDAP_DEBUG_ANY,
"connection_init(%ld): invalid.\n",
(long) s, 0, 0 );
return -1;
}
assert( s >= 0 );
#ifndef HAVE_WINSOCK
assert( s < dtblsize );
#endif
ldap_pvt_thread_mutex_lock( &connections_mutex );
#ifndef HAVE_WINSOCK
c = &connections[s];
#else
{
unsigned int i;
c = NULL;
for( i=0; i < dtblsize; i++) {
ber_socket_t sd;
if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
assert( connections[i].c_sb == 0 );
c = &connections[i];
break;
}
sd = AC_SOCKET_INVALID;
if (connections[i].c_sb != NULL)
ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
assert( sd == AC_SOCKET_INVALID );
c = &connections[i];
break;
}
assert( connections[i].c_struct_state == SLAP_C_USED );
assert( connections[i].c_conn_state != SLAP_C_INVALID );
assert( sd != AC_SOCKET_INVALID );
}
if( c == NULL ) {
Debug( LDAP_DEBUG_ANY,
"connection_init(%d): connection table full (%d/%d)\n",
s, i, dtblsize);
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return -1;
}
}
#endif
assert( c != NULL );
if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
c->c_authmech = NULL;
c->c_dn = NULL;
c->c_cdn = NULL;
c->c_listener_url = NULL;
c->c_peer_domain = NULL;
c->c_peer_name = NULL;
c->c_sock_name = NULL;
c->c_ops = NULL;
c->c_pending_ops = NULL;
c->c_sasl_bind_mech = NULL;
c->c_sasl_context = NULL;
c->c_sasl_extra = NULL;
c->c_sb = ber_sockbuf_alloc( );
c->c_currentber = NULL;
/* should check status of thread calls */
ldap_pvt_thread_mutex_init( &c->c_mutex );
ldap_pvt_thread_mutex_init( &c->c_write_mutex );
ldap_pvt_thread_cond_init( &c->c_write_cv );
c->c_struct_state = SLAP_C_UNUSED;
}
ldap_pvt_thread_mutex_lock( &c->c_mutex );
assert( c->c_struct_state == SLAP_C_UNUSED );
assert( c->c_authmech == NULL );
assert( c->c_dn == NULL );
assert( c->c_cdn == NULL );
assert( c->c_listener_url == NULL );
assert( c->c_peer_domain == NULL );
assert( c->c_peer_name == NULL );
assert( c->c_sock_name == NULL );
assert( c->c_ops == NULL );
assert( c->c_pending_ops == NULL );
assert( c->c_sasl_bind_mech == NULL );
assert( c->c_sasl_context == NULL );
assert( c->c_sasl_extra == NULL );
assert( c->c_currentber == NULL );
c->c_listener_url = ch_strdup( url );
c->c_peer_domain = ch_strdup( dnsname );
c->c_peer_name = ch_strdup( peername );
c->c_sock_name = ch_strdup( sockname );
c->c_n_ops_received = 0;
c->c_n_ops_executing = 0;
c->c_n_ops_pending = 0;
c->c_n_ops_completed = 0;
c->c_n_get = 0;
c->c_n_read = 0;
c->c_n_write = 0;
/* assume LDAPv3 until bind */
c->c_protocol = LDAP_VERSION3;
c->c_activitytime = c->c_starttime = slap_get_time();
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp, LBER_SBIOD_LEVEL_PROVIDER,
(void *)&s );
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
LBER_SBIOD_LEVEL_PROVIDER, NULL );
#ifdef LDAP_DEBUG
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug, INT_MAX, NULL );
#endif
if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK, c /* non-NULL */ ) < 0 ) {
Debug( LDAP_DEBUG_ANY,
"connection_init(%d, %s): set nonblocking failed\n",
s, c->c_peer_name, 0 );
}
id = c->c_connid = conn_nextid++;
c->c_conn_state = SLAP_C_INACTIVE;
c->c_struct_state = SLAP_C_USED;
#ifdef HAVE_TLS
if ( use_tls ) {
c->c_is_tls = 1;
c->c_needs_tls_accept = 1;
} else {
c->c_is_tls = 0;
c->c_needs_tls_accept = 0;
}
#endif
slap_sasl_open( c );
slap_sasl_external( c, ssf, authid );
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
backend_connection_init(c);
return id;
}
static void
connection_destroy( Connection *c )
{
/* note: connections_mutex should be locked by caller */
ber_socket_t sd;
assert( connections != NULL );
assert( c != NULL );
assert( c->c_struct_state != SLAP_C_UNUSED );
assert( c->c_conn_state != SLAP_C_INVALID );
assert( c->c_ops == NULL );
backend_connection_destroy(c);
c->c_protocol = 0;
c->c_connid = -1;
c->c_activitytime = c->c_starttime = 0;
if(c->c_authmech != NULL ) {
free(c->c_authmech);
c->c_authmech = NULL;
}
if(c->c_dn != NULL) {
free(c->c_dn);
c->c_dn = NULL;
}
if(c->c_cdn != NULL) {
free(c->c_cdn);
c->c_cdn = NULL;
}
if(c->c_listener_url != NULL) {
free(c->c_listener_url);
c->c_listener_url = NULL;
}
if(c->c_peer_domain != NULL) {
free(c->c_peer_domain);
c->c_peer_domain = NULL;
}
if(c->c_peer_name != NULL) {
#ifdef LDAP_PF_lOCAL
/*
* If peer was a domain socket, unlink. Mind you,
* they may be un-named. Should we leave this to
* the client?
*/
if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
char *path = c->c_peer_name + 5;
if (path != '\0') {
(void)unlink(path);
}
}
#endif /* LDAP_PF_LOCAL */
free(c->c_peer_name);
c->c_peer_name = NULL;
}
if(c->c_sock_name != NULL) {
free(c->c_sock_name);
c->c_sock_name = NULL;
}
c->c_sasl_bind_in_progress = 0;
if(c->c_sasl_bind_mech != NULL) {
free(c->c_sasl_bind_mech);
c->c_sasl_bind_mech = NULL;
}
slap_sasl_close( c );
if ( c->c_currentber != NULL ) {
ber_free( c->c_currentber, 1 );
c->c_currentber = NULL;
}
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
if ( sd != AC_SOCKET_INVALID ) {
slapd_remove( sd, 0 );
Statslog( LDAP_DEBUG_STATS,
"conn=%ld fd=%d closed\n",
c->c_connid, sd, 0, 0, 0 );
}
ber_sockbuf_free( c->c_sb );
c->c_sb = ber_sockbuf_alloc( );
c->c_conn_state = SLAP_C_INVALID;
c->c_struct_state = SLAP_C_UNUSED;
}
int connection_state_closing( Connection *c )
{
/* c_mutex must be locked by caller */
int state;
assert( c != NULL );
assert( c->c_struct_state == SLAP_C_USED );
state = c->c_conn_state;
assert( state != SLAP_C_INVALID );
return state == SLAP_C_CLOSING;
}
static void connection_abandon( Connection *c )
{
/* c_mutex must be locked by caller */
Operation *o;
for( o = c->c_ops; o != NULL; o = o->o_next ) {
ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
o->o_abandon = 1;
ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
}
/* remove pending operations */
for( o = slap_op_pop( &c->c_pending_ops );
o != NULL;
o = slap_op_pop( &c->c_pending_ops ) )
{
slap_op_free( o );
}
}
void connection_closing( Connection *c )
{
assert( connections != NULL );
assert( c != NULL );
assert( c->c_struct_state == SLAP_C_USED );
assert( c->c_conn_state != SLAP_C_INVALID );
/* c_mutex must be locked by caller */
if( c->c_conn_state != SLAP_C_CLOSING ) {
ber_socket_t sd;
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
Debug( LDAP_DEBUG_TRACE,
"connection_closing: readying conn=%ld sd=%d for close\n",
c->c_connid, sd, 0 );
/* update state to closing */
c->c_conn_state = SLAP_C_CLOSING;
/* don't listen on this port anymore */
slapd_clr_read( sd, 1 );
/* abandon active operations */
connection_abandon( c );
/* wake write blocked operations */
slapd_clr_write( sd, 1 );
ldap_pvt_thread_cond_signal( &c->c_write_cv );
}
}
static void connection_close( Connection *c )
{
ber_socket_t sd;
assert( connections != NULL );
assert( c != NULL );
assert( c->c_struct_state == SLAP_C_USED );
assert( c->c_conn_state == SLAP_C_CLOSING );
/* note: connections_mutex and c_mutex should be locked by caller */
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
if( c->c_ops != NULL ) {
Debug( LDAP_DEBUG_TRACE,
"connection_close: deferring conn=%ld sd=%d\n",
c->c_connid, sd, 0 );
return;
}
Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
c->c_connid, sd, 0 );
connection_destroy( c );
}
unsigned long connections_nextid(void)
{
unsigned long id;
assert( connections != NULL );
ldap_pvt_thread_mutex_lock( &connections_mutex );
id = conn_nextid;
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return id;
}
Connection* connection_first( ber_socket_t *index )
{
assert( connections != NULL );
assert( index != NULL );
ldap_pvt_thread_mutex_lock( &connections_mutex );
*index = 0;
return connection_next(NULL, index);
}
Connection* connection_next( Connection *c, ber_socket_t *index )
{
assert( connections != NULL );
assert( index != NULL );
assert( *index <= dtblsize );
if( c != NULL ) {
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}
c = NULL;
for(; *index < dtblsize; (*index)++) {
if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
assert( connections[*index].c_conn_state == SLAP_C_INVALID );
#ifndef HAVE_WINSOCK
continue;
#else
break;
#endif
}
if( connections[*index].c_struct_state == SLAP_C_USED ) {
assert( connections[*index].c_conn_state != SLAP_C_INVALID );
c = &connections[(*index)++];
break;
}
assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
assert( connections[*index].c_conn_state == SLAP_C_INVALID );
}
if( c != NULL ) {
ldap_pvt_thread_mutex_lock( &c->c_mutex );
}
return c;
}
void connection_done( Connection *c )
{
assert( connections != NULL );
if( c != NULL ) {
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}
ldap_pvt_thread_mutex_unlock( &connections_mutex );
}
/*
* connection_activity - handle the request operation op on connection
* conn. This routine figures out what kind of operation it is and
* calls the appropriate stub to handle it.
*/
static void *
connection_operation( void *arg_v )
{
int rc;
struct co_arg *arg = arg_v;
ber_tag_t tag = arg->co_op->o_tag;
Connection *conn = arg->co_conn;
ldap_pvt_thread_mutex_lock( &num_ops_mutex );
num_ops_initiated++;
ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
Debug( LDAP_DEBUG_ANY, "connection_operation: "
"error: SASL bind in progress (tag=%ld).\n",
(long) tag, 0, 0 );
send_ldap_result( conn, arg->co_op,
rc = LDAP_OPERATIONS_ERROR,
NULL, "SASL bind in progress", NULL, NULL );
goto operations_error;
}
switch ( tag ) {
case LDAP_REQ_BIND:
rc = do_bind( conn, arg->co_op );
break;
case LDAP_REQ_UNBIND:
rc = do_unbind( conn, arg->co_op );
break;
case LDAP_REQ_ADD:
rc = do_add( conn, arg->co_op );
break;
case LDAP_REQ_DELETE:
rc = do_delete( conn, arg->co_op );
break;
case LDAP_REQ_MODRDN:
rc = do_modrdn( conn, arg->co_op );
break;
case LDAP_REQ_MODIFY:
rc = do_modify( conn, arg->co_op );
break;
case LDAP_REQ_COMPARE:
rc = do_compare( conn, arg->co_op );
break;
case LDAP_REQ_SEARCH:
rc = do_search( conn, arg->co_op );
break;
case LDAP_REQ_ABANDON:
rc = do_abandon( conn, arg->co_op );
break;
case LDAP_REQ_EXTENDED:
rc = do_extended( conn, arg->co_op );
break;
default:
Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
tag, 0, 0 );
arg->co_op->o_tag = LBER_ERROR;
send_ldap_disconnect( conn, arg->co_op,
LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
rc = -1;
break;
}
if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
operations_error:
ldap_pvt_thread_mutex_lock( &num_ops_mutex );
num_ops_completed++;
ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
ldap_pvt_thread_mutex_lock( &conn->c_mutex );
conn->c_n_ops_executing--;
conn->c_n_ops_completed++;
slap_op_remove( &conn->c_ops, arg->co_op );
slap_op_free( arg->co_op );
arg->co_op = NULL;
arg->co_conn = NULL;
free( (char *) arg );
arg = NULL;
switch( tag ) {
case LBER_ERROR:
case LDAP_REQ_UNBIND:
/* c_mutex is locked */
connection_closing( conn );
break;
case LDAP_REQ_BIND:
conn->c_sasl_bind_in_progress =
rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
if( conn->c_conn_state == SLAP_C_BINDING) {
conn->c_conn_state = SLAP_C_ACTIVE;
}
}
connection_resched( conn );
ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
return NULL;
}
int connection_read(ber_socket_t s)
{
int rc = 0;
Connection *c;
assert( connections != NULL );
ldap_pvt_thread_mutex_lock( &connections_mutex );
/* get (locked) connection */
c = connection_get( s );
if( c == NULL ) {
Debug( LDAP_DEBUG_ANY,
"connection_read(%ld): no connection!\n",
(long) s, 0, 0 );
slapd_remove(s, 0);
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return -1;
}
c->c_n_read++;
if( c->c_conn_state == SLAP_C_CLOSING ) {
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): closing, ignoring input for id=%ld\n",
s, c->c_connid, 0 );
connection_return( c );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return 0;
}
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): checking for input on id=%ld\n",
s, c->c_connid, 0 );
#ifdef HAVE_TLS
if ( c->c_is_tls && c->c_needs_tls_accept ) {
rc = ldap_pvt_tls_accept( c->c_sb, NULL );
if ( rc < 0 ) {
struct timeval tv;
fd_set rfd;
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): TLS accept error error=%d id=%ld, closing\n",
s, rc, c->c_connid );
c->c_needs_tls_accept = 0;
/* connections_mutex and c_mutex are locked */
connection_closing( c );
/* Drain input before close, to allow SSL error codes
* to propagate to client. */
FD_ZERO(&rfd);
FD_SET(s, &rfd);
for (rc=1; rc>0;)
{
tv.tv_sec = 1;
tv.tv_usec = 0;
rc = select(s+1, &rfd, NULL, NULL, &tv);
if (rc == 1)
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
NULL);
}
connection_close( c );
} else if ( rc == 0 ) {
c->c_needs_tls_accept = 0;
#if 0
/* we need to let SASL know */
slap_sasl_external( c, ssf, authid );
#endif
}
connection_return( c );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return 0;
}
#endif
#define CONNECTION_INPUT_LOOP 1
#ifdef DATA_READY_LOOP
while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
#elif CONNECTION_INPUT_LOOP
while(!rc)
#endif
{
/* How do we do this without getting into a busy loop ? */
rc = connection_input( c );
}
if( rc < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): input error=%d id=%ld, closing.\n",
s, rc, c->c_connid );
/* connections_mutex and c_mutex are locked */
connection_closing( c );
connection_close( c );
}
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
slapd_set_read( s, 1 );
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
slapd_set_write( s, 1 );
connection_return( c );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return 0;
}
static int
connection_input(
Connection *conn
)
{
Operation *op;
ber_tag_t tag;
ber_len_t len;
ber_int_t msgid;
BerElement *ber;
if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
== NULL ) {
Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
return -1;
}
errno = 0;
tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
if ( tag != LDAP_TAG_MESSAGE ) {
int err = errno;
ber_socket_t sd;
ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
Debug( LDAP_DEBUG_TRACE,
"ber_get_next on fd %d failed errno=%d (%s)\n",
sd, err, sock_errstr(err) );
if ( err != EWOULDBLOCK && err != EAGAIN ) {
/* log, close and send error */
ber_free( conn->c_currentber, 1 );
conn->c_currentber = NULL;
return -2;
}
return 1;
}
ber = conn->c_currentber;
conn->c_currentber = NULL;
if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
/* log, close and send error */
Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
0 );
ber_free( ber, 1 );
return -1;
}
if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
/* log, close and send error */
Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
0 );
ber_free( ber, 1 );
return -1;
}
if(tag == LDAP_REQ_BIND) {
/* immediately abandon all exiting operations upon BIND */
connection_abandon( conn );
}
op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
if ( conn->c_conn_state == SLAP_C_BINDING
|| conn->c_conn_state == SLAP_C_CLOSING )
{
Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
conn->c_n_ops_pending++;
slap_op_add( &conn->c_pending_ops, op );
} else {
conn->c_n_ops_executing++;
connection_op_activate( conn, op );
}
#ifdef NO_THREADS
if ( conn->c_struct_state != SLAP_C_USED ) {
/* connection must have got closed underneath us */
return 1;
}
#endif
assert( conn->c_struct_state == SLAP_C_USED );
return 0;
}
static int
connection_resched( Connection *conn )
{
Operation *op;
if( conn->c_conn_state == SLAP_C_CLOSING ) {
ber_socket_t sd;
ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
Debug( LDAP_DEBUG_TRACE,
"connection_resched: attempting closing conn=%ld sd=%d\n",
conn->c_connid, sd, 0 );
ldap_pvt_thread_mutex_lock( &connections_mutex );
connection_close( conn );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return 0;
}
if( conn->c_conn_state != SLAP_C_ACTIVE ) {
/* other states need different handling */
return 0;
}
for( op = slap_op_pop( &conn->c_pending_ops );
op != NULL;
op = slap_op_pop( &conn->c_pending_ops ) )
{
/* pending operations should not be marked for abandonment */
assert(!op->o_abandon);
conn->c_n_ops_pending--;
conn->c_n_ops_executing++;
connection_op_activate( conn, op );
if ( conn->c_conn_state == SLAP_C_BINDING ) {
break;
}
}
return 0;
}
static int connection_op_activate( Connection *conn, Operation *op )
{
struct co_arg *arg;
char *tmpdn;
int status;
ber_tag_t tag = op->o_tag;
if(tag == LDAP_REQ_BIND) {
conn->c_conn_state = SLAP_C_BINDING;
}
if ( conn->c_dn != NULL ) {
tmpdn = ch_strdup( conn->c_dn );
} else {
tmpdn = NULL;
}
arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
arg->co_conn = conn;
arg->co_op = op;
arg->co_op->o_dn = ch_strdup( tmpdn != NULL ? tmpdn : "" );
arg->co_op->o_ndn = ch_strdup( arg->co_op->o_dn );
(void) dn_normalize( arg->co_op->o_ndn );
arg->co_op->o_protocol = conn->c_protocol;
arg->co_op->o_connid = conn->c_connid;
arg->co_op->o_authtype = conn->c_authtype;
arg->co_op->o_authmech = conn->c_authmech != NULL
? ch_strdup( conn->c_authmech ) : NULL;
slap_op_add( &conn->c_ops, arg->co_op );
if( tmpdn != NULL ) {
free( tmpdn );
}
status = ldap_pvt_thread_pool_submit( &connection_pool,
connection_operation, (void *) arg );
if ( status != 0 ) {
Debug( LDAP_DEBUG_ANY,
"ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );
/* should move op to pending list */
}
return status;
}
int connection_write(ber_socket_t s)
{
Connection *c;
assert( connections != NULL );
ldap_pvt_thread_mutex_lock( &connections_mutex );
c = connection_get( s );
slapd_clr_write( s, 0);
if( c == NULL ) {
Debug( LDAP_DEBUG_ANY,
"connection_write(%ld): no connection!\n",
(long) s, 0, 0 );
slapd_remove(s, 0);
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return -1;
}
c->c_n_write++;
Debug( LDAP_DEBUG_TRACE,
"connection_write(%d): waking output for id=%ld\n",
s, c->c_connid, 0 );
ldap_pvt_thread_cond_signal( &c->c_write_cv );
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
slapd_set_read( s, 1 );
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
slapd_set_write( s, 1 );
connection_return( c );
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return 0;
}