755 lines
27 KiB
C++
755 lines
27 KiB
C++
/*
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* Copyright (c) 2013-2016 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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*/
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/**
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* @file
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* Wind River CGCS Platform Process Monitor Service Messaging
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*/
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#include <sys/stat.h>
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#include <linux/un.h>
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#include "pmon.h"
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#include "nodeMacro.h"
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#include "pmonAlarm.h" /* for ... this module's alarm utilities / defs */
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#include "hostwMsg.h"
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#include "jsonUtil.h"
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/* Where to send events */
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string mtcAgent_ip = "" ;
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static int pulse_log_threshold ;
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/**
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* Messaging Socket Control Struct - The allocated struct
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*/
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static pmon_socket_type pmon_sock;
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pmon_socket_type * pmon_getSock_ptr ( void )
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{
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return ( &pmon_sock );
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}
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msgSock_type * get_mtclogd_sockPtr ( void )
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{
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return (&pmon_sock.mtclogd);
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}
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/*********************************************************************/
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/* Setup pmon broadcast transmit port/socket */
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/*********************************************************************/
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int event_port_init ( const char * iface , int port )
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{
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int rc = PASS ;
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/* Load the event port number */
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pmon_sock.event_port = port ;
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mtcAgent_ip = getipbyname ( CONTROLLER );
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ilog ("ControllerIP: %s\n", mtcAgent_ip.c_str());
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pmon_sock.event_sock = new msgClassTx(mtcAgent_ip.c_str(), port, IPPROTO_UDP, iface);
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if (pmon_sock.event_sock->return_status!=PASS)
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{
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elog ("Failed to setup pmond to mtce transmit event port %d\n", port );
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return (pmon_sock.event_sock->return_status) ;
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}
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return rc;
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}
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/* Setup the Unix Domain Transmit Pulse Socket */
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int pulse_port_init ( void )
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{
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int rc = PASS ;
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int port = daemon_get_cfg_ptr()->pmon_pulse_port;
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pmon_sock.pulse_sock = new msgClassTx(LOOPBACK_IP, port, IPPROTO_UDP);
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if (pmon_sock.pulse_sock->return_status!=PASS) return (pmon_sock.pulse_sock->return_status) ;
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snprintf (&pmon_sock.pulse.hdr[0], MSG_HEADER_SIZE, "%s", get_pmond_pulse_header());
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pmon_sock.msg_len = ((sizeof(mtc_message_type))-(BUF_SIZE));
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return (rc);
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}
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/* Setup the Unix Host Watchdog Socket */
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int hostwd_port_init ( void )
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{
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memset(&pmon_sock.hostwd_addr, 0, sizeof(pmon_sock.hostwd_addr));
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pmon_sock.hostwd_sock = socket(AF_UNIX, SOCK_DGRAM, 0);
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if (pmon_sock.hostwd_sock <= 0)
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{
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wlog("Could not connect to create hostwd socket - will retry\n");
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pmon_sock.hostwd_sock = 0 ;
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return (FAIL_SOCKET_CREATE);
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}
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/* Set up the socket address */
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memset (&pmon_sock.hostwd_addr, 0, sizeof(pmon_sock.hostwd_addr));
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pmon_sock.hostwd_addr.sun_family = AF_UNIX;
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/* Unix abstract namespace takes a string that starts with a NULL
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* as the identifier. Thus, we need a pointer to byte[1] of the
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* sockaddr_un.sun_path (a char array)
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*/
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strncpy( &(pmon_sock.hostwd_addr.sun_path[1]),
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HOSTW_UNIX_SOCKNAME,
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UNIX_PATH_MAX-1);
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int len = sizeof(pmon_sock.hostwd_addr);
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int connected = connect( pmon_sock.hostwd_sock, (sockaddr*) &pmon_sock.hostwd_addr,
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len);
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if (connected == -1)
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{
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wlog("Could not connect to hostwd port - will retry\n");
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if ( pmon_sock.hostwd_sock )
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close(pmon_sock.hostwd_sock);
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pmon_sock.hostwd_sock = 0;
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return (FAIL_CONNECT);
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}
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ilog ("connected to host watchdog\n");
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return (PASS);
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}
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/* Build a message for host watchdog, and send it */
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int pmon_send_hostwd ( void )
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{
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if (pmon_sock.hostwd_sock)
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{
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mtc_message_type msg;
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int bytes;
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int i;
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memset(&msg, 0, sizeof(msg));
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memcpy (&msg.hdr, get_cmd_req_msg_header(), MSG_HEADER_SIZE);
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msg.ver = MTC_CMD_VERSION;
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msg.rev = MTC_CMD_REVISION;
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msg.cmd = MTC_CMD_NONE; /* All good - take no action */
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for (i = 0; i < get_ctrl_ptr()->processes; i++)
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{
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process_config_type * pProcess = get_process_config_ptr (i);
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if (pProcess->quorum && pProcess->quorum_unrecoverable)
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{
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ilog ("%s unrecoverable ; reporting this to host watchdog\n", pProcess->process);
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snprintf ( (char*) &(msg.buf),
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BUF_SIZE - 1,
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"PMON detected %s failure",
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pProcess->process);
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msg.cmd = MTC_EVENT_PMON_CRIT; /* things are bad */
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}
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}
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bytes = sendto( pmon_sock.hostwd_sock,
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(char*)&msg,
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sizeof(msg),
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0, /* flags */
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(struct sockaddr *) &pmon_sock.hostwd_addr,
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sizeof(pmon_sock.hostwd_addr) );
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if (bytes == sizeof(msg))
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{
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return (PASS);
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}
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else
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{
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elog("Error sending message to host watchdog -- error %d (%s)\n",
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errno, strerror(errno));
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if ( pmon_sock.hostwd_sock )
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{
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close(pmon_sock.hostwd_sock);
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pmon_sock.hostwd_sock = 0;
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}
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return (FAIL);
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}
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}
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return (FAIL);
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}
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/****************************/
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/* Initialization Utilities */
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/****************************/
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/* Init the messaging socket control structure
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* The following messaging interfaces use this structure and
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* are initialized separately
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*
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* pulse_port_init - port that pmon I'm alive messages are transmitted on
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* event_port_init - port that pmon sends events to mtce on
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* amon_port_init - aggrigated active process monitor receive port
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*
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* */
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void pmon_msg_init ( void )
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{
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memset(&pmon_sock, 0, sizeof(pmon_sock));
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pulse_log_threshold = 0 ;
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}
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void pmon_msg_fini ( void )
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{
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/* Close the pmond pulse socket */
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if ( pmon_sock.cmd_sock )
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delete (pmon_sock.cmd_sock );
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if ( pmon_sock.event_sock )
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delete (pmon_sock.event_sock);
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if (pmon_sock.pulse_sock)
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delete pmon_sock.pulse_sock;
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if ( pmon_sock.amon_sock )
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close (pmon_sock.amon_sock);
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if ( pmon_sock.hostwd_sock )
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close (pmon_sock.hostwd_sock);
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}
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/* Initialize the command receive port
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* Its a LO interface only */
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int pmon_inbox_init ( void )
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{
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pmon_sock.cmd_sock = new msgClassRx(LOOPBACK_IP,daemon_get_cfg_ptr()->pmon_cmd_port,IPPROTO_UDP);
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if ( pmon_sock.cmd_sock )
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{
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pmon_sock.cmd_port = daemon_get_cfg_ptr()->pmon_cmd_port ;
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pmon_sock.cmd_sock->sock_ok(true);
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return (PASS);
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}
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return (FAIL);
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}
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int pmon_send_pulse ( void )
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{
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#define LOG_THROTTLE 1000
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int bytes = pmon_sock.pulse_sock->write((char*)&pmon_sock.pulse, pmon_sock.msg_len);
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if ( bytes <= 0 )
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{
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/* Force reconnect attempt on next go around */
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elog ("Cannot sendto hbsClient (bytes=%d) (%d:%s)\n",
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bytes , errno, strerror(errno));
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}
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else
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{
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ilog_throttled ( pulse_log_threshold, LOG_THROTTLE, "sent health pulse - %d bytes (throttled:%d)\n", bytes, LOG_THROTTLE );
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dlog3 ( "Pulse: %s (%d:%d)\n", &pmon_sock.pulse.hdr[0],
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pmon_sock.pulse_sock->get_dst_addr()->getSockLen(), bytes );
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}
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return (PASS) ;
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}
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int pmon_send_event ( unsigned int event_cmd , process_config_type * ptr )
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{
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mtc_message_type event ;
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int rc = PASS ;
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/* Don't report events while we are in reset mode */
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if ( daemon_is_file_present ( NODE_RESET_FILE ) )
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return ( PASS );
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pmon_ctrl_type * ctrl_ptr = get_ctrl_ptr () ;
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memset (&event, 0 , sizeof(mtc_message_type));
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snprintf ( &event.hdr[0], MSG_HEADER_SIZE, "%s", get_mtce_event_header());
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event.cmd = event_cmd ;
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event.ver = MTC_CMD_FEATURE_VER__KEYVALUE_IN_BUF ;
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event.num = 1 ;
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event.parm[0] = ctrl_ptr->nodetype ; /* default to node type */
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string event_info = "{\"" ;
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event_info.append(MTC_JSON_INV_NAME);
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event_info.append("\":\"");
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event_info.append(ctrl_ptr->my_hostname);
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event_info.append("\",\"");
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event_info.append(MTC_JSON_SERVICE);
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event_info.append("\":\"");
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event_info.append(MTC_SERVICE_PMOND_NAME );
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if ( ( ptr != NULL ) && ( ptr->process ) )
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{
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event_info.append("\",\"");
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event_info.append(MTC_JSON_PROCESS);
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event_info.append("\":\"");
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event_info.append(ptr->process);
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}
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event_info.append( "\"}");
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size_t len = event_info.length()+1 ;
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snprintf ( &event.buf[0], len, "%s", event_info.data());
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int bytes = ((sizeof(mtc_message_type))-(BUF_SIZE-len));
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/* override with subfunction case */
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if (( ptr != NULL ) &&
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( ctrl_ptr->subfunction != 0 ) &&
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( ctrl_ptr->subfunction != ctrl_ptr->function ))
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{
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if ( ptr->subfunction != NULL )
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{
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string temp = ptr->subfunction ;
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event.parm[0]= get_host_function_mask (temp) ;
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if ( ( event_cmd == MTC_EVENT_PMON_MINOR) ||
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( event_cmd == MTC_EVENT_PMON_MAJOR) ||
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( event_cmd == MTC_EVENT_PMON_LOG) ||
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( event_cmd == MTC_EVENT_PMON_CRIT ) )
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{
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mlog ("%s process failed\n", ptr->process );
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}
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else if (( event_cmd == MTC_EVENT_PMON_CLEAR ) && ( ptr->was_failed == true ))
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{
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ilog ("%s process recovered\n", ptr->process );
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ptr->was_failed = false ;
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}
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}
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}
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/* Send the event */
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if ((rc = pmon_sock.event_sock->write((char*)&event.hdr[0], bytes)) != bytes )
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{
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elog ("event message send failed (%d) (%d) (%d:%m) (%s:%d)\n",
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bytes, rc, errno,
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pmon_sock.event_sock->get_dst_addr()->toString(),
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pmon_sock.event_sock->get_dst_addr()->getPort());
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}
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else
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{
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string severity = get_event_str ( event.cmd );
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if ( ptr )
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{
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/* Only log the clear event for a specified process.
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* Avoid logging the periodic degrade clear event. */
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ilog ("%s %s sent", ctrl_ptr->my_hostname,
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get_mtcNodeCommand_str(event_cmd));
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}
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rc = PASS ;
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}
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print_mtc_message ( ctrl_ptr->my_hostname, MTC_CMD_TX, event, get_iface_name_str(MGMNT_INTERFACE), rc );
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return rc ;
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}
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/**************************************************************************
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*
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* ********** A C T I V E M O N I T O R I N G **********
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*
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*************************************************************************/
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int amon_port_init ( int port )
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{
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int val = 1 ;
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int rc = FAIL ;
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if ( port )
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{
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pmon_sock.amon_port = port ;
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pmon_sock.amon_sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if ( 0 >= pmon_sock.amon_sock )
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return (-errno);
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if ( setsockopt ( pmon_sock.amon_sock , SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int)) == -1 )
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{
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wlog ( "amon: failed to set active monitor socket as re-useable (%d:%s)\n",
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errno, strerror(errno));
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}
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/* Set socket to be non-blocking. */
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rc = ioctl(pmon_sock.amon_sock, FIONBIO, (char *)&val);
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if ( 0 > rc )
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{
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elog ("Failed to set amon socket non-blocking\n");
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}
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/* Setup with localhost ip */
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memset(&pmon_sock.amon_addr, 0, sizeof(struct sockaddr_in));
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pmon_sock.amon_addr.sin_family = AF_INET ;
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// pmon_sock.amon_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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pmon_sock.amon_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
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pmon_sock.amon_addr.sin_port = htons(pmon_sock.amon_port) ;
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/* bind socket to the receive addr */
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if ( bind ( pmon_sock.amon_sock, (const struct sockaddr *)&pmon_sock.amon_addr, sizeof(struct sockaddr_in)) == -1 )
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{
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elog ( "failed to bind to rx socket with port %d (%d:%s)\n", port, errno, strerror(errno) );
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close (pmon_sock.amon_sock);
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pmon_sock.amon_sock = 0 ;
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return (-errno);
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}
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else
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{
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rc = PASS ;
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}
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}
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else
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{
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elog ("No port specified\n");
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}
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return (rc) ;
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}
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int open_process_socket ( process_config_type * ptr )
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{
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int rc = FAIL ;
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/* Prop the port numnber into the message struct */
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if ( ptr->port )
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ptr->msg.tx_port = ptr->port ;
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if ( ptr->msg.tx_port )
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{
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/* if the sock is already open then close it first */
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if ( ptr->msg.tx_sock )
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{
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wlog ("%s open on already open socket %d, closing first\n",
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ptr->process, ptr->msg.tx_sock );
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close (ptr->msg.tx_sock);
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}
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ptr->msg.tx_sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if ( 0 >= ptr->msg.tx_sock )
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return (-errno);
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/* Setup with localhost ip */
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memset(&ptr->msg.tx_addr, 0, sizeof(struct sockaddr_in));
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ptr->msg.tx_addr.sin_family = AF_INET ;
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ptr->msg.tx_addr.sin_addr.s_addr = inet_addr(LOOPBACK_IP);
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ptr->msg.tx_addr.sin_port = htons(ptr->msg.tx_port) ;
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rc = PASS ;
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}
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else
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{
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elog ("%s has no port specified\n", ptr->process );
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}
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return (rc) ;
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}
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void close_process_socket ( process_config_type * ptr )
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{
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if ( ptr->msg.tx_sock )
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close ( ptr->msg.tx_sock );
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}
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int amon_service_inbox ( int processes )
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{
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#define MAX_T 100
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int count = 0 ;
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int bytes = 0 ;
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char buf[AMON_MAX_LEN] ;
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socklen_t len = sizeof(struct sockaddr_in) ;
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do
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{
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char str[AMON_MAX_LEN] ;
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unsigned int magic = 0 ;
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int seq = 0 ;
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memset ( buf,0,sizeof(buf));
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memset ( str,0,sizeof(str));
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bytes = recvfrom( pmon_sock.amon_sock, buf, AMON_MAX_LEN, 0, (struct sockaddr *)&pmon_sock.amon_addr, &len);
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if ( bytes > 0 )
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{
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sscanf ( buf, "%99s %8x %d", str, &magic, &seq );
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if ( AMON_MAGIC_NUM == (magic ^ -1) )
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{
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if ( str[0] != '\0' )
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{
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bool found = false ;
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for ( int i = 0 ; i < processes ; i++ )
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{
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process_config_type * ptr = get_process_config_ptr (i);
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if ( ptr != NULL )
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{
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if ( ! strcmp ( str, ptr->process ) )
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{
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found = true ;
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alog ( "%s %x %d (found)\n", ptr->process, magic, seq );
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if ( ptr->waiting == true )
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{
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ptr->rx_sequence = seq ;
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}
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else
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{
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wlog_throttled ( count , MAX_T, "%s unexpected monitor pulse\n", ptr->process );
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}
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break ;
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}
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}
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}
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if ( !found )
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{
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wlog_throttled (count, MAX_T, "Unexpected message (%s)\n", buf );
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}
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}
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else
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{
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wlog ("Null string !\n");
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}
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}
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else
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{
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wlog_throttled ( count, MAX_T, "message with invalid magic number (%x)\n", magic );
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}
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}
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else if (( 0 > bytes ) && ( errno != EINTR ) && ( errno != EAGAIN ))
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{
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wlog_throttled ( count , MAX_T, "receive error (%d:%s)\n", errno, strerror(errno));
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}
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} while ( bytes > 0 ) ;
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/* Put the messages in he structs */
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return (PASS);
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}
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int amon_send_request ( process_config_type * ptr )
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{
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int rc ;
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ptr->rx_sequence = 0 ;
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memset ( ptr->msg.tx_buf, 0, sizeof(ptr->msg.tx_buf));
|
|
sprintf ( ptr->msg.tx_buf, "%s %x %u", ptr->process, AMON_MAGIC_NUM, ++ptr->tx_sequence ) ;
|
|
|
|
rc = sendto ( ptr->msg.tx_sock,
|
|
ptr->msg.tx_buf ,
|
|
strlen ( ptr->msg.tx_buf), 0,
|
|
(struct sockaddr *) &ptr->msg.tx_addr,
|
|
sizeof(struct sockaddr_in));
|
|
if ( 0 >= rc )
|
|
{
|
|
elog ("%s sendto error (%d:%s) (%s) (%s)\n",
|
|
ptr->process,
|
|
errno , strerror(errno),
|
|
ptr->msg.tx_buf,
|
|
inet_ntoa(ptr->msg.tx_addr.sin_addr));
|
|
}
|
|
else
|
|
{
|
|
mlog3 ("%s\n", &ptr->msg.tx_buf[0] );
|
|
rc = PASS ;
|
|
}
|
|
return (rc);
|
|
}
|
|
|
|
|
|
#define MAX_COMMANDS (4)
|
|
|
|
/******************************************************************
|
|
*
|
|
* Handle pmon command request messages
|
|
*
|
|
* Supports a max MAX_COMMANDS number of queued messages per call
|
|
* Checks for valid command string and content before action
|
|
*
|
|
* message format : json string { key:value , key:value }
|
|
*
|
|
* supported requests:
|
|
*
|
|
* { "command":"restart", "process":"<process name>" }
|
|
*
|
|
*****************************************************************/
|
|
void pmon_service_inbox ( void )
|
|
{
|
|
int bytes = 0 ;
|
|
int retries = 0 ;
|
|
do
|
|
{
|
|
/* Receive command messages */
|
|
char cmd_buf[MAX_COMMAND_LEN] ;
|
|
|
|
memset ( &cmd_buf, 0, sizeof(cmd_buf));
|
|
|
|
bytes = pmon_sock.cmd_sock->read((char*)&cmd_buf, MAX_COMMAND_LEN );
|
|
if ( bytes > 0 )
|
|
{
|
|
if ( bytes <= MAX_COMMAND_LEN )
|
|
{
|
|
bool string_is_terminated = false ;
|
|
for ( int i = 0 ; i < MAX_COMMAND_LEN ; i++ )
|
|
{
|
|
if ( cmd_buf[i] == '\0' )
|
|
{
|
|
string_is_terminated = true ;
|
|
break ;
|
|
}
|
|
}
|
|
if ( string_is_terminated )
|
|
{
|
|
string command ;
|
|
string process ;
|
|
|
|
mlog1 ("rx <- %s\n", cmd_buf );
|
|
int rc1 = jsonUtil_get_key_val ( &cmd_buf[0], "command", command );
|
|
int rc2 = jsonUtil_get_key_val ( &cmd_buf[0], "process", process );
|
|
mlog ("cmd:%s process:%s\n", command.c_str(), process.c_str());
|
|
if ( rc1 || rc2 )
|
|
{
|
|
ilog ("failed to parse command request.\n");
|
|
ilog ("... expecting: command:<command>, process:<process>\n");
|
|
wlog ("... received : %s\n", cmd_buf );
|
|
}
|
|
else
|
|
{
|
|
if ( (!command.compare("none")) || (!process.compare("none")))
|
|
{
|
|
wlog ("one or more invalid command request key:value pairs\n");
|
|
wlog ("... command:%s process:%s\n",
|
|
command.c_str(),
|
|
process.c_str());
|
|
}
|
|
/* handle start command
|
|
* - get the pointer to the specified process
|
|
* - if its in the stopped state then take it out of that state
|
|
* - inject it into the respawn phase of the passive monitor FSM
|
|
*/
|
|
else if ( !command.compare("start"))
|
|
{
|
|
process_config_type * ptr = get_process_config_ptr ( process );
|
|
ilog ("%s process 'start' request\n", process.c_str());
|
|
if ( ptr != NULL )
|
|
{
|
|
if ( strcmp ( ptr->mode, "status" ) == 0 )
|
|
{
|
|
wlog ("%s process-start rejected\n", process.c_str());
|
|
wlog ("%s ... status monitoring mode 'start' not supported\n", process.c_str());
|
|
}
|
|
else if ( ptr->stopped == true )
|
|
{
|
|
mtcTimer_reset ( ptr->pt_ptr );
|
|
ptr->failed = true ; // so get_events will ignore it till process respawn is complete
|
|
ptr->stopped = false ; // take the process out of the stopped state
|
|
ptr->ignore = false ; // have the fsm stop ignoriing the process ; start respawn
|
|
passiveStageChange ( ptr, PMON_STAGE__RESPAWN );
|
|
}
|
|
else
|
|
{
|
|
wlog ("%s process is not in the stopped state ; start request ignored\n", ptr->process );
|
|
}
|
|
}
|
|
}
|
|
/* handle stop command
|
|
* - get the pointer to the specified process
|
|
* - unregister the process to avoid a kernel notification
|
|
* - kill the process
|
|
* - put it in the ignored state
|
|
* - put it in the stopped state
|
|
* - reinitialize its active monitoring states and stats
|
|
* - start the auto recovery timer
|
|
*/
|
|
else if ( !command.compare("stop"))
|
|
{
|
|
process_config_type * ptr = get_process_config_ptr ( process );
|
|
ilog ("%s process 'stop' request\n", process.c_str());
|
|
if ( ptr != NULL )
|
|
{
|
|
if ( strcmp ( ptr->mode, "status" ) == 0 )
|
|
{
|
|
wlog ("%s process-stop rejected\n", process.c_str());
|
|
wlog ("%s ... status monitoring mode 'stop' not supported\n", process.c_str());
|
|
}
|
|
else if ( ptr->stopped == true )
|
|
{
|
|
wlog ("%s process is already stopped ; stop request ignored\n", ptr->process );
|
|
}
|
|
else
|
|
{
|
|
int auto_recovery_timeout = MTC_MINS_30 ;
|
|
unregister_process ( ptr );
|
|
kill_running_process ( ptr->pid );
|
|
ptr->stopped = true ;
|
|
ptr->ignore = true ;
|
|
passiveStageChange ( ptr, PMON_STAGE__IGNORE ) ; /* as a backup */
|
|
if ( !strcmp ( ptr->mode, "active" ) )
|
|
{
|
|
activeStageChange ( ptr , ACTIVE_STAGE__IDLE );
|
|
}
|
|
|
|
mtcTimer_reset ( ptr->pt_ptr );
|
|
/* Start a recovery timer */
|
|
mtcTimer_start ( ptr->pt_ptr, pmon_timer_handler, auto_recovery_timeout );
|
|
ilog ("%s process 'stopped' by request ; auto restart in %d seconds\n",
|
|
ptr->process,
|
|
auto_recovery_timeout);
|
|
}
|
|
}
|
|
}
|
|
/* handle restart command */
|
|
else if ( !command.compare("restart"))
|
|
{
|
|
/* handle this 'pmond' process restart request */
|
|
if ( !process.compare("pmond") )
|
|
{
|
|
ilog ("%s self-restart ; by request\n", process.c_str());
|
|
/* process is auto restarted by systemd in centos or inittab in WRL */
|
|
daemon_exit ();
|
|
}
|
|
else
|
|
{
|
|
process_config_type * ptr = get_process_config_ptr ( process );
|
|
dlog ("%s process 'restart' request\n", process.c_str());
|
|
if ( ptr != NULL )
|
|
{
|
|
if ( strcmp ( ptr->mode, "status" ) == 0 )
|
|
{
|
|
wlog ("%s process-restart rejected\n", process.c_str());
|
|
wlog ("%s ... status monitoring mode restart not supported\n", process.c_str());
|
|
}
|
|
else if ( ptr->restart == false )
|
|
{
|
|
ilog ("%s process-restart ; by request\n", process.c_str());
|
|
ptr->restart = true ;
|
|
if ( ptr->stopped )
|
|
{
|
|
ptr->stopped = false ;
|
|
ptr->ignore = false ;
|
|
}
|
|
passiveStageChange ( ptr, PMON_STAGE__MANAGE );
|
|
}
|
|
else
|
|
{
|
|
ilog ("%s process-restart ; in progress\n",
|
|
process.c_str());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
wlog ("%s process-restart ; cannot execute, process not found\n",
|
|
process.c_str());
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
wlog ("unsupported command:%s for process:%s\n",
|
|
command.c_str(), process.c_str());
|
|
}
|
|
} /* end else */
|
|
}
|
|
else
|
|
{
|
|
wlog ("badly formed command request (%d) (not null terminated)\n", bytes );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
; /* message to big ; do not log to protect against DOS attack */
|
|
}
|
|
}
|
|
else if ( bytes < 0 )
|
|
{
|
|
if ( errno == EAGAIN )
|
|
{
|
|
return ;
|
|
}
|
|
else
|
|
{
|
|
wlog ("commnd socket read error (%d:%d:%m)\n", bytes, errno );
|
|
}
|
|
}
|
|
retries++ ;
|
|
} while ( ( bytes != 0 ) && ( retries < MAX_COMMANDS ) ) ;
|
|
}
|
|
|