source/ihost/ihost.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * 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 <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <syslog.h>
#include <netinet/in.h>
#include "ukcprog.h"
#include <netdb.h>
#include <string.h>
#include "statgrab.h"
#include <time.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <syslog.h>

#define VERSION_NO "0.8"
#define RECONFIGURE_RETURN_CODE 2
#define UDP_MAX_PACKET_SIZE 8192
#define PID_FILE "/var/tmp/.ihost.pid"

#define logmessage(level, ...) do { cur_level = level; errf(__VA_ARGS__); } while (0)

typedef struct{
        int fm_port;
        char *fm_host;

        char *my_ip;    
        char *my_fqdn;
        char *server_fqdn;
        int server_udp_port;
        int server_tcp_port;
        char *last_modified;
        char *files_list;
        char *key;
        int udp_update_time;
        int tcp_update_time;

}ihost_state_t;

static int log_level;
static int cur_level;
static int syslog_logging;

void log_errors(const char *message){
        if(log_level>=cur_level){
                if (syslog_logging==1){
                        syslog(cur_level, "%s\n", message);
                }else{
                        fprintf(stderr, "%s\n", message);
                }
        }       
}

char* sock_comm(FILE *f_r, FILE *f_w, char *sendString){
        char *reply;
        logmessage(LOG_DEBUG, "Sending %s",sendString);
        fprintf(f_w, "%s\n", sendString);
        fflush(f_w);
        reply=fpgetline(f_r);
        if (reply!=NULL) logmessage(LOG_DEBUG, "Received %s", reply);
        /* Returns pointer to static buffer */
        return reply;
}       

int ihost_configure(ihost_state_t *ihost_state){
        struct sockaddr_in addr;
        struct in_addr haddr;
        struct sockaddr ip;
        int ip_len;
        int sd;
        FILE *fm_fd_r, *fm_fd_w;
        char *reply;
        char *reply_ptr;

        /* Check to see if anything needs to be free'd */
        if (ihost_state->my_fqdn!=NULL) free(ihost_state->my_fqdn);
        if (ihost_state->server_fqdn!=NULL) free(ihost_state->server_fqdn);
        if (ihost_state->last_modified!=NULL) free(ihost_state->last_modified);
        if (ihost_state->files_list!=NULL) free(ihost_state->files_list);

        logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->fm_host, ihost_state->fm_port);
        if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
                logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
                return -1;
        }

        if (get_host_addr(ihost_state->fm_host, &haddr) != 0){
                logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->fm_host);
                return -1;
        }

        memset(&addr, 0, sizeof addr);
        addr.sin_family = AF_INET;
        memcpy(&addr.sin_addr, &haddr, sizeof haddr);
        addr.sin_port =  htons(ihost_state->fm_port);

        if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
                logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->fm_host, ihost_state->fm_port);
                return -1;
        }

        /* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
        if ((fm_fd_r=fdopen(sd,"r")) == NULL){
                logmessage(LOG_ERR, "Failed to open read stream (%m)");
                return -1;
        }

        if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
                logmessage(LOG_ERR, "Failed to open write stream (%m)");
                return -1;
        }
        ip_len=sizeof ip;
        memset(&ip, 0, ip_len);
        if((getsockname(sd, &ip, &ip_len)) != 0){
                logmessage(LOG_ERR, "Failed to get IP address (%m)");
                return -1;
        }
        if (ip.sa_family!=AF_INET){
                logmessage(LOG_ERR, "sa family is wrong type");
                return -1;
        }
        
        if((ihost_state->my_ip=strdup(inet_ntoa(((struct sockaddr_in *)&ip)->sin_addr)))==NULL){
                logmessage(LOG_ERR, "Failed to get IP (%m)");
                return -1;
        }       
        
        reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG");
        if ((reply==NULL) || (strncasecmp(reply, "OK", 2) != 0) ) {
                logmessage(LOG_ERR, "Server error on STARTCONFIG");     
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED");
        if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0)){
                logmessage(LOG_ERR, "Server error on LASTMODIFIED (%m)");
                return -1;
        }
        if((ihost_state->last_modified=strdup(reply)) == NULL){
                logmessage(LOG_ERR, "strdup failed (%m)");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST");
        if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0)){
                logmessage(LOG_ERR, "Server error on FILELIST (%m)");
                return -1;
        }
        if((ihost_state->files_list=strdup(reply)) == NULL){
                logmessage(LOG_ERR, "strdup failed (%m)");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN");
        if((reply== NULL) || (strncasecmp(reply, "ERROR", 5)==0)){
                logmessage(LOG_ERR, "Server error on FQDN (%m)");
                return -1;
        }
        if((ihost_state->my_fqdn=strdup(reply)) == NULL){
                logmessage(LOG_ERR, "strdup failed (%m)");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime");
        if(reply== NULL){
                logmessage(LOG_ERR, "Server error (%m)");
                return -1;
        }
        if (strncasecmp(reply, "ERROR", 5) != 0){
                ihost_state->udp_update_time=atoi(reply);
        }
        
        reply=sock_comm(fm_fd_r, fm_fd_w, "TCPUpdateTime");
        if(reply== NULL){
                logmessage(LOG_ERR, "Server error on TCPUpdateTime (%m)");
                return -1;
        }
        if (strncasecmp(reply, "ERROR", 5) != 0){
                ihost_state->tcp_update_time=atoi(reply);
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG");
        if(reply== NULL){
                logmessage(LOG_ERR, "Server error on ENDCONFIG (%m)");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER");
        if((reply== NULL) || (strncasecmp(reply, "ERROR", 5)==0)){
                logmessage(LOG_ERR, "Server error FILTER failed (%m)");
                return -1;
        }
        reply_ptr=strchr(reply,';');
        if (reply_ptr==NULL){
                logmessage(LOG_ERR, "Incorrect data returned");
                return -1;
        }
        *reply_ptr='\0';
        if((ihost_state->server_fqdn=strdup(reply)) == NULL){
                logmessage(LOG_ERR, "strdup failed (%m)");
                return -1;
        }
        reply=reply_ptr + 1;
        reply_ptr=strchr(reply,';');
        if (reply_ptr==NULL){
                logmessage(LOG_ERR, "Incorrect data returned 2");
                return -1;
        }
        *reply_ptr='\0';
        ihost_state->server_udp_port=atoi(reply);
        reply=reply_ptr+1;
        ihost_state->server_tcp_port=atoi(reply);
        if ((ihost_state->server_tcp_port==0) || (ihost_state->server_udp_port==0)){
                logmessage(LOG_ERR, "Incorrect data returned 3 ");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "END");
        if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0 )){
                logmessage(LOG_ERR, "Server error on END (%m)");
                return -1;
        }

        if(fclose(fm_fd_r) !=0){
                logmessage(LOG_ERR, "Failed to close read FD (%m)");
                return -1;
        }
        if(fclose(fm_fd_w) !=0){
                logmessage(LOG_ERR, "Failed to close write FD (%m)");
                return -1;
        }

        return 0;
}

int heartbeat(ihost_state_t *ihost_state){
        struct sockaddr_in addr;
        struct in_addr haddr;
        int sd;
        FILE *fm_fd_r, *fm_fd_w;
        char *reply;
        int exitcode=0;

        logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->server_fqdn, ihost_state->server_tcp_port);
        if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
                logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
                return -1;
        }

        if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
                logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
                return -1;
        }

        memset(&addr, 0, sizeof addr);
        addr.sin_family = AF_INET;
        memcpy(&addr.sin_addr, &haddr, sizeof haddr);
        addr.sin_port =  htons(ihost_state->server_tcp_port);

        if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
                logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->server_fqdn, ihost_state->server_tcp_port);
                return -1;
        }

        /* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
        if ((fm_fd_r=fdopen(sd,"r")) == NULL){
                logmessage(LOG_ERR, "Failed to open stream (%m)");
                return -1;
        }

        if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
                logmessage(LOG_ERR, "Failed to open stream (%m)");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "HEARTBEAT");
        if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
                logmessage(LOG_ERR, "Server error on HEARTBEAT");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "CONFIG");
        if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
                logmessage(LOG_ERR, "Server error on CONFIG");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->files_list);
        if ((reply==NULL) || (strncasecmp(reply, "OK", 2) != 0) ) {
                logmessage(LOG_ERR, "Server error on fileslist");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->last_modified);
        if (reply==NULL) {
                logmessage(LOG_ERR, "Server error NULL recieved on lastmodified");
                return -1;
        }
        if (strncasecmp(reply, "ERROR", 5) == 0){
        /* Means the config has changed */
                logmessage(LOG_INFO, "Recieved ERROR from server for a reconfigure required");
                exitcode=RECONFIGURE_RETURN_CODE;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "KEY");
        if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
                logmessage(LOG_ERR, "Server error on KEY");
                return -1;
        }
        if (ihost_state->key!=NULL) free(ihost_state->key);
 
        if((ihost_state->key=strdup(reply)) == NULL){
                logmessage(LOG_ERR, "strdup failed (%m)");
                return -1;
        }

        reply=sock_comm(fm_fd_r, fm_fd_w, "ENDHEARTBEAT");
        if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0 )){
                logmessage(LOG_ERR, "Server error on ENDHEARTBEAT (%m)");
                return -1;
        }

        fflush(fm_fd_r);
        fflush(fm_fd_w);

        if(fclose(fm_fd_r) !=0){
                logmessage(LOG_ERR, "Failed to close read FD (%m)");
                return -1;
        }
        if(fclose(fm_fd_w) !=0){
                logmessage(LOG_ERR, "Failed to close write FD (%m)");
                return -1;
        }

        return exitcode;                
}

char *stat_grab(ihost_state_t *ihost_state, int counter){
#define NUM_STATS 9
        char *stats[NUM_STATS];
        char *xml_data=NULL;
        char *xml_data_p;
        int xml_size=0;
        int x=0;

        logmessage(LOG_DEBUG,"get_cpu_stats");  
        stats[0]=get_cpu_stats();
        logmessage(LOG_DEBUG,"get_disk_stats"); 
        stats[1]=get_disk_stats();
        logmessage(LOG_DEBUG,"get_load_stats"); 
        stats[2]=get_load_stats();      
        logmessage(LOG_DEBUG,"get_memory_stats");               
        stats[3]=get_memory_stats();
        logmessage(LOG_DEBUG,"get_os_info");    
        stats[4]=get_os_info();
        logmessage(LOG_DEBUG,"get_page_stats"); 
        stats[5]=get_page_stats();
        logmessage(LOG_DEBUG,"get_process_stats");      
        stats[6]=get_process_stats();
        logmessage(LOG_DEBUG,"get_swap_stats"); 
        stats[7]=get_swap_stats();
        logmessage(LOG_DEBUG,"get_user_stats"); 
        stats[8]=get_user_stats();
        

        for(x=0;x<NUM_STATS;x++){
                if(stats[x]==NULL){
                        logmessage(LOG_ERR,"Function returned NULL");
                        return NULL;
                }
                xml_size+=strlen(stats[x]);
        }

        xml_data=malloc(xml_size+1);
        xml_data=strcpy(xml_data, stats[0]);
        free(stats[0]);
        for(x=1;x<NUM_STATS;x++){
                strcat(xml_data, stats[x]);
                free(stats[x]);
        }

        xml_data_p=xml_data;
        xml_data=strf("<packet seq_no=\"%d\" machine_name=\"%s\" date=\"%ld\" type=\"data\" ip=\"%s\" key=\"%s\">%s</packet>", counter, ihost_state->my_fqdn, time(NULL), ihost_state->my_ip, ihost_state->key, xml_data);
        free(xml_data_p); 

        logmessage(LOG_DEBUG,"Generated XML Data of : %s", xml_data);   
        return xml_data;
}

int send_stats(ihost_state_t *ihost_state, char *data_stream){
        struct sockaddr_in addr;
        struct in_addr haddr;

        int sd;
        size_t len;

        len=strlen(data_stream);
        if(len>UDP_MAX_PACKET_SIZE){
                logmessage(LOG_ERR, "Too big to send to server. Please reconfigure client and server and recompile");
                exit(1);
        }
        logmessage(LOG_DEBUG,"Resolving IP of server"); 
        if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
                logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
                return -1;
        }
        logmessage(LOG_DEBUG,"Creating UDP socket to %s on %d",ihost_state->server_fqdn, ihost_state->server_udp_port);
        if((sd=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0){
                logmessage(LOG_ERR, "failed to create UDP socket (%m)");
                return -1;
        }

        memset(&addr, 0, sizeof(addr));
        addr.sin_family=AF_INET;
        memcpy((char *)&addr.sin_addr, &haddr, sizeof haddr);
        addr.sin_port =  htons(ihost_state->server_udp_port);

        logmessage(LOG_INFO,"Sending packet : %s", data_stream);
        if((sendto(sd, data_stream, len, 0, (struct sockaddr *) &addr, sizeof(addr))) != len){
                logmessage(LOG_ERR, "Send the wrong number of bytes (%m)");
                return -1;
        }

        close(sd);

        return 0;       
}

void usage(char *progname){
        fprintf(stderr, "Usage %s [options] server port\n", progname);
        fprintf(stderr, "Options\n");
        fprintf(stderr, "  -v           Verbose, the more v flags the more verbose, eg -vv\n");
        fprintf(stderr, "  -d           Daemon mode, self backgrounding\n");
        fprintf(stderr, "  -s           Send errors to syslog\n");
        fprintf(stderr, "  -V           Print version number\n");
        fprintf(stderr, "  -h           Prints this help page\n");      
        exit(1);        
}

int main(int argc, char **argv){
        ihost_state_t ihost_state;
        int heartbeat_exit;
        int counter=0;
        long udp_time=0, tcp_time=0, stat_grab_time=0, cur_time=0;
        int sleep_delay=0;
        char *xml_stats;
        pid_t pid;
        int cmdopt;
        extern int optind;
        int verbose=0, daemon=0;
        extern int syslog_logging;
        extern int log_level;
        extern int cur_level;
        FILE *f;

        log_level=1;
        cur_level=1;
        syslog_logging=0;

        errf_set_ofunc(log_errors);
        /* NULL'ify so i can tell if i need to free it or not */
        ihost_state.fm_host=NULL;
        ihost_state.my_fqdn=NULL;
        ihost_state.server_fqdn=NULL;
        ihost_state.last_modified=NULL;
        ihost_state.files_list=NULL;
        ihost_state.key=NULL;

        errf_set_progname(argv[0]);
        

        while((cmdopt=getopt(argc, argv, "vdshV")) != -1){
                switch(cmdopt){
                        case 'v':
                                verbose++;
                                break;
                        
                        case 'd':
                                /* Force syslog logging since stderr will be closed in this case */
                                syslog_logging=1;
                                daemon=1;
                                break;
                        
                        case 's':
                                syslog_logging=1;
                                break;
        
                        case 'h':
                                usage(argv[0]);
                                break;

                        case 'V':
                                errf("%s version %s",argv[0], VERSION_NO);
                                break;

                        default:
                                usage(argv[0]);
                                exit(1);
                }
        }

        if(argc!=optind+2){
                usage(argv[0]);
                exit(1);
        }
        ihost_state.fm_host=argv[optind];
        ihost_state.fm_port=atoi(argv[optind+1]);
        if(ihost_state.fm_port==0){
                errf("Invalid port number");
                usage(argv[0]);
        }

        if(daemon==1){
                pid=fork();
                if(pid==-1){
                        errf("Fork failed, can't background. Exiting");
                        exit(1);
                }else if(pid!=0){
                        /* Parent process */
                        return 0;
                }
                /* We should now be in the background*/
                if(setsid()==-1){
                        errf("setsid failed (%m)");
                        exit(1);
                }
                fclose(stdin);
                fclose(stdout);
                fclose(stderr);
        }

        if(syslog_logging==1){
                   openlog(errf_get_progname(),0,LOG_ERR);
                   setlogmask(LOG_UPTO(LOG_DEBUG));
        }
                
        switch(verbose){
                case 0:
                        /* Critical errors + */
                        log_level=LOG_ERR;
                        break;
                case 1:
                        /* Recoverable errors */
                        log_level=LOG_WARNING;
                        break;
                case 2: 
                        /* Print stuff like the XML packets */
                        log_level=LOG_INFO;
                        break;
                default:
                        /* Must have lots of v's */
                        /* Print out everything its doing */
                        log_level=LOG_DEBUG;
                        break;
        }

        logmessage(LOG_DEBUG,"Writing PID FILE");
        pid=getpid();
        if((f=fopen(PID_FILE,"w")) == NULL){
                logmessage(LOG_WARNING, "Failed to write PID file");
        }else{
                if((fprintf(f,"%d",(int)pid)) > 0 ){
                        logmessage(LOG_WARNING, "Failed to write PID file");
                }
                if((fclose(f))!=0){
                        logmessage(LOG_ERR, "failed to close PID file");
                        exit(1);
                }
        }

        if(ihost_configure(&ihost_state)!=0){
                logmessage(LOG_ERR,"configure failed");
                /* Ok, ideally we prob should have 2 copies of the structure and carry on if this
                happens.. But we dont :) (at the moment) */
                exit(1);
        }

        for(;;){
                cur_time=time(NULL);
                if(cur_time>=tcp_time){
                        logmessage(LOG_DEBUG,"Sending heartbeat");
                        heartbeat_exit=heartbeat(&ihost_state);
                        if(heartbeat_exit==RECONFIGURE_RETURN_CODE){
                                logmessage(LOG_INFO,"heartbeat needs to be reconfigured");
                                ihost_configure(&ihost_state);
                                udp_time=0;
                        }
                        if(heartbeat_exit==-1){
                                logmessage(LOG_ERR,"Heartbeat failed");
                                exit(1);
                        }
                        tcp_time=time(NULL)+ihost_state.tcp_update_time;
                        logmessage(LOG_DEBUG,"next tcp time should be %d", tcp_time);
                }

                if(cur_time>=udp_time){
                        logmessage(LOG_DEBUG,"Sending udp data");
                        /* Work out how long it takes to get the stats for next time round
                           so the sleep time can be adjusted accordingly */
                        stat_grab_time=time(NULL);
                        if((xml_stats=stat_grab(&ihost_state, counter++)) == NULL){
                                logmessage(LOG_ERR,"Failed to get stats (%m)");
                                exit(1);
                        }
                        stat_grab_time=time(NULL)-stat_grab_time;
                        send_stats(&ihost_state, xml_stats);
                        free(xml_stats);
                        udp_time=time(NULL)+ihost_state.udp_update_time-stat_grab_time;
                        logmessage(LOG_DEBUG,"next udp time should be %d", udp_time);
                }

                if(tcp_time<udp_time){
                        sleep_delay=tcp_time-time(NULL);
                }else{
                        sleep_delay=udp_time-time(NULL);
                }
                logmessage(LOG_DEBUG,"Sleeping for %d", sleep_delay);
                if(sleep_delay>0) sleep(sleep_delay);
        }
        return 0;
}

Revision:	1.23
Committed:	Tue May 21 16:47:12 2002 UTC (22 years, 7 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+1 -0 lines
Log Message:	Added URL to GPL headers.
#	User	Rev	Content
1	tdb	1.11	/*
2			* i-scream central monitoring system
3	tdb	1.23	* http://www.i-scream.org.uk
4	tdb	1.11	* Copyright (C) 2000-2002 i-scream
5			*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21	pajs	1.1	#include <stdio.h>
22			#include <stdlib.h>
23	pajs	1.18	#include <sys/types.h>
24	pajs	1.1	#include <unistd.h>
25			#include <syslog.h>
26			#include <netinet/in.h>
27	pajs	1.9	#include "ukcprog.h"
28	pajs	1.1	#include <netdb.h>
29	pajs	1.12	#include <string.h>
30	pajs	1.9	#include "statgrab.h"
31	pajs	1.12	#include <time.h>
32	pajs	1.14	#include <sys/socket.h>
33	pajs	1.16	#include <arpa/inet.h>
34	pajs	1.18	#include <syslog.h>
35	pajs	1.1
36	pajs	1.22	#define VERSION_NO "0.8"
37	pajs	1.4	#define RECONFIGURE_RETURN_CODE 2
38	pajs	1.9	#define UDP_MAX_PACKET_SIZE 8192
39	pajs	1.19	#define PID_FILE "/var/tmp/.ihost.pid"
40	pajs	1.4
41	pajs	1.18	#define logmessage(level, ...) do { cur_level = level; errf(__VA_ARGS__); } while (0)
42
43	pajs	1.1	typedef struct{
44			int fm_port;
45			char *fm_host;
46	pajs	1.16
47			char *my_ip;
48	pajs	1.1	char *my_fqdn;
49			char *server_fqdn;
50			int server_udp_port;
51			int server_tcp_port;
52	pajs	1.4	char *last_modified;
53	pajs	1.1	char *files_list;
54			char *key;
55			int udp_update_time;
56			int tcp_update_time;
57
58			}ihost_state_t;
59
60	pajs	1.18	static int log_level;
61			static int cur_level;
62			static int syslog_logging;
63
64			void log_errors(const char *message){
65			if(log_level>=cur_level){
66			if (syslog_logging==1){
67			syslog(cur_level, "%s\n", message);
68			}else{
69			fprintf(stderr, "%s\n", message);
70			}
71			}
72			}
73
74	pajs	1.7	char* sock_comm(FILE f_r, FILE f_w, char *sendString){
75	pajs	1.1	char *reply;
76	pajs	1.21	logmessage(LOG_DEBUG, "Sending %s",sendString);
77	pajs	1.7	fprintf(f_w, "%s\n", sendString);
78	pajs	1.2	fflush(f_w);
79			reply=fpgetline(f_r);
80	pajs	1.21	if (reply!=NULL) logmessage(LOG_DEBUG, "Received %s", reply);
81	pajs	1.1	/* Returns pointer to static buffer */
82			return reply;
83			}
84
85			int ihost_configure(ihost_state_t *ihost_state){
86			struct sockaddr_in addr;
87			struct in_addr haddr;
88	pajs	1.16	struct sockaddr ip;
89			int ip_len;
90	pajs	1.1	int sd;
91	pajs	1.2	FILE fm_fd_r, fm_fd_w;
92	pajs	1.1	char *reply;
93	pajs	1.2	char *reply_ptr;
94	pajs	1.1
95	pajs	1.5	/* Check to see if anything needs to be free'd */
96			if (ihost_state->my_fqdn!=NULL) free(ihost_state->my_fqdn);
97			if (ihost_state->server_fqdn!=NULL) free(ihost_state->server_fqdn);
98			if (ihost_state->last_modified!=NULL) free(ihost_state->last_modified);
99			if (ihost_state->files_list!=NULL) free(ihost_state->files_list);
100
101	pajs	1.18	logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->fm_host, ihost_state->fm_port);
102	pajs	1.1	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
103	pajs	1.18	logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
104	pajs	1.1	return -1;
105			}
106
107			if (get_host_addr(ihost_state->fm_host, &haddr) != 0){
108	pajs	1.18	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->fm_host);
109	pajs	1.1	return -1;
110			}
111
112	pajs	1.9	memset(&addr, 0, sizeof addr);
113	pajs	1.1	addr.sin_family = AF_INET;
114	pajs	1.9	memcpy(&addr.sin_addr, &haddr, sizeof haddr);
115	pajs	1.1	addr.sin_port = htons(ihost_state->fm_port);
116
117			if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
118	pajs	1.18	logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->fm_host, ihost_state->fm_port);
119	pajs	1.1	return -1;
120			}
121
122	pajs	1.2	/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
123			if ((fm_fd_r=fdopen(sd,"r")) == NULL){
124	pajs	1.18	logmessage(LOG_ERR, "Failed to open read stream (%m)");
125	pajs	1.2	return -1;
126			}
127
128			if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
129	pajs	1.18	logmessage(LOG_ERR, "Failed to open write stream (%m)");
130	pajs	1.1	return -1;
131			}
132	pajs	1.16	ip_len=sizeof ip;
133			memset(&ip, 0, ip_len);
134			if((getsockname(sd, &ip, &ip_len)) != 0){
135	pajs	1.18	logmessage(LOG_ERR, "Failed to get IP address (%m)");
136	pajs	1.16	return -1;
137			}
138			if (ip.sa_family!=AF_INET){
139	pajs	1.18	logmessage(LOG_ERR, "sa family is wrong type");
140	pajs	1.16	return -1;
141			}
142
143	pajs	1.22	if((ihost_state->my_ip=strdup(inet_ntoa(((struct sockaddr_in *)&ip)->sin_addr)))==NULL){
144	pajs	1.18	logmessage(LOG_ERR, "Failed to get IP (%m)");
145	pajs	1.16	return -1;
146			}
147	pajs	1.18
148	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG");
149	pajs	1.1	if ((reply==NULL) \|\| (strncasecmp(reply, "OK", 2) != 0) ) {
150	pajs	1.18	logmessage(LOG_ERR, "Server error on STARTCONFIG");
151	pajs	1.1	return -1;
152			}
153
154	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED");
155	pajs	1.2	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0)){
156	pajs	1.18	logmessage(LOG_ERR, "Server error on LASTMODIFIED (%m)");
157	pajs	1.1	return -1;
158			}
159	pajs	1.7	if((ihost_state->last_modified=strdup(reply)) == NULL){
160	pajs	1.18	logmessage(LOG_ERR, "strdup failed (%m)");
161	pajs	1.4	return -1;
162			}
163	pajs	1.18
164	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST");
165	pajs	1.2	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0)){
166	pajs	1.18	logmessage(LOG_ERR, "Server error on FILELIST (%m)");
167	pajs	1.1	return -1;
168			}
169	pajs	1.7	if((ihost_state->files_list=strdup(reply)) == NULL){
170	pajs	1.18	logmessage(LOG_ERR, "strdup failed (%m)");
171	pajs	1.6	return -1;
172			}
173	pajs	1.1
174	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN");
175	pajs	1.2	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5)==0)){
176	pajs	1.18	logmessage(LOG_ERR, "Server error on FQDN (%m)");
177	pajs	1.1	return -1;
178			}
179			if((ihost_state->my_fqdn=strdup(reply)) == NULL){
180	pajs	1.18	logmessage(LOG_ERR, "strdup failed (%m)");
181	pajs	1.1	return -1;
182			}
183
184	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime");
185	pajs	1.1	if(reply== NULL){
186	pajs	1.18	logmessage(LOG_ERR, "Server error (%m)");
187	pajs	1.1	return -1;
188			}
189			if (strncasecmp(reply, "ERROR", 5) != 0){
190			ihost_state->udp_update_time=atoi(reply);
191			}
192	pajs	1.18
193	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "TCPUpdateTime");
194	pajs	1.1	if(reply== NULL){
195	pajs	1.18	logmessage(LOG_ERR, "Server error on TCPUpdateTime (%m)");
196	pajs	1.1	return -1;
197			}
198			if (strncasecmp(reply, "ERROR", 5) != 0){
199			ihost_state->tcp_update_time=atoi(reply);
200			}
201
202	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG");
203	pajs	1.1	if(reply== NULL){
204	pajs	1.18	logmessage(LOG_ERR, "Server error on ENDCONFIG (%m)");
205	pajs	1.1	return -1;
206			}
207
208	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER");
209	pajs	1.2	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5)==0)){
210	pajs	1.18	logmessage(LOG_ERR, "Server error FILTER failed (%m)");
211	pajs	1.2	return -1;
212			}
213			reply_ptr=strchr(reply,';');
214			if (reply_ptr==NULL){
215	pajs	1.18	logmessage(LOG_ERR, "Incorrect data returned");
216	pajs	1.2	return -1;
217			}
218			*reply_ptr='\0';
219			if((ihost_state->server_fqdn=strdup(reply)) == NULL){
220	pajs	1.18	logmessage(LOG_ERR, "strdup failed (%m)");
221	pajs	1.2	return -1;
222			}
223	pajs	1.8	reply=reply_ptr + 1;
224	pajs	1.2	reply_ptr=strchr(reply,';');
225			if (reply_ptr==NULL){
226	pajs	1.18	logmessage(LOG_ERR, "Incorrect data returned 2");
227	pajs	1.2	return -1;
228			}
229			*reply_ptr='\0';
230			ihost_state->server_udp_port=atoi(reply);
231	pajs	1.8	reply=reply_ptr+1;
232	pajs	1.2	ihost_state->server_tcp_port=atoi(reply);
233			if ((ihost_state->server_tcp_port==0) \|\| (ihost_state->server_udp_port==0)){
234	pajs	1.18	logmessage(LOG_ERR, "Incorrect data returned 3 ");
235	pajs	1.2	return -1;
236			}
237
238	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "END");
239	pajs	1.2	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0 )){
240	pajs	1.18	logmessage(LOG_ERR, "Server error on END (%m)");
241	pajs	1.2	return -1;
242			}
243	pajs	1.1
244	pajs	1.2	if(fclose(fm_fd_r) !=0){
245	pajs	1.18	logmessage(LOG_ERR, "Failed to close read FD (%m)");
246	pajs	1.2	return -1;
247			}
248			if(fclose(fm_fd_w) !=0){
249	pajs	1.18	logmessage(LOG_ERR, "Failed to close write FD (%m)");
250	pajs	1.2	return -1;
251			}
252	pajs	1.1
253			return 0;
254			}
255	pajs	1.4
256			int heartbeat(ihost_state_t *ihost_state){
257			struct sockaddr_in addr;
258			struct in_addr haddr;
259			int sd;
260			FILE fm_fd_r, fm_fd_w;
261			char *reply;
262			int exitcode=0;
263
264	pajs	1.18	logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->server_fqdn, ihost_state->server_tcp_port);
265	pajs	1.4	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
266	pajs	1.18	logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
267	pajs	1.4	return -1;
268			}
269
270			if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
271	pajs	1.18	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
272	pajs	1.4	return -1;
273			}
274
275	pajs	1.9	memset(&addr, 0, sizeof addr);
276	pajs	1.4	addr.sin_family = AF_INET;
277	pajs	1.9	memcpy(&addr.sin_addr, &haddr, sizeof haddr);
278	pajs	1.4	addr.sin_port = htons(ihost_state->server_tcp_port);
279
280			if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
281	pajs	1.18	logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->server_fqdn, ihost_state->server_tcp_port);
282	pajs	1.4	return -1;
283			}
284
285			/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
286			if ((fm_fd_r=fdopen(sd,"r")) == NULL){
287	pajs	1.18	logmessage(LOG_ERR, "Failed to open stream (%m)");
288	pajs	1.4	return -1;
289			}
290
291			if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
292	pajs	1.18	logmessage(LOG_ERR, "Failed to open stream (%m)");
293	pajs	1.4	return -1;
294			}
295
296	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "HEARTBEAT");
297	pajs	1.6	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
298	pajs	1.18	logmessage(LOG_ERR, "Server error on HEARTBEAT");
299	pajs	1.4	return -1;
300			}
301	pajs	1.9
302	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "CONFIG");
303	pajs	1.6	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
304	pajs	1.18	logmessage(LOG_ERR, "Server error on CONFIG");
305	pajs	1.4	return -1;
306			}
307
308			reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->files_list);
309			if ((reply==NULL) \|\| (strncasecmp(reply, "OK", 2) != 0) ) {
310	pajs	1.18	logmessage(LOG_ERR, "Server error on fileslist");
311	pajs	1.4	return -1;
312			}
313
314			reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->last_modified);
315			if (reply==NULL) {
316	pajs	1.18	logmessage(LOG_ERR, "Server error NULL recieved on lastmodified");
317	pajs	1.4	return -1;
318			}
319	pajs	1.6	if (strncasecmp(reply, "ERROR", 5) == 0){
320	pajs	1.4	/* Means the config has changed */
321	pajs	1.18	logmessage(LOG_INFO, "Recieved ERROR from server for a reconfigure required");
322	pajs	1.4	exitcode=RECONFIGURE_RETURN_CODE;
323			}
324	pajs	1.18
325	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "KEY");
326	pajs	1.6	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
327	pajs	1.18	logmessage(LOG_ERR, "Server error on KEY");
328	pajs	1.4	return -1;
329			}
330	pajs	1.5	if (ihost_state->key!=NULL) free(ihost_state->key);
331
332	pajs	1.7	if((ihost_state->key=strdup(reply)) == NULL){
333	pajs	1.18	logmessage(LOG_ERR, "strdup failed (%m)");
334	pajs	1.4	return -1;
335			}
336
337	pajs	1.7	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDHEARTBEAT");
338	pajs	1.4	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0 )){
339	pajs	1.18	logmessage(LOG_ERR, "Server error on ENDHEARTBEAT (%m)");
340	pajs	1.4	return -1;
341			}
342
343	pajs	1.10	fflush(fm_fd_r);
344			fflush(fm_fd_w);
345
346	pajs	1.6	if(fclose(fm_fd_r) !=0){
347	pajs	1.18	logmessage(LOG_ERR, "Failed to close read FD (%m)");
348	pajs	1.6	return -1;
349			}
350			if(fclose(fm_fd_w) !=0){
351	pajs	1.18	logmessage(LOG_ERR, "Failed to close write FD (%m)");
352	pajs	1.6	return -1;
353			}
354
355	pajs	1.4	return exitcode;
356			}
357
358	pajs	1.9	char stat_grab(ihost_state_t ihost_state, int counter){
359			#define NUM_STATS 9
360			char *stats[NUM_STATS];
361			char *xml_data=NULL;
362			char *xml_data_p;
363	pajs	1.20	int xml_size=0;
364	pajs	1.9	int x=0;
365	pajs	1.18
366			logmessage(LOG_DEBUG,"get_cpu_stats");
367	pajs	1.9	stats[0]=get_cpu_stats();
368	pajs	1.18	logmessage(LOG_DEBUG,"get_disk_stats");
369	pajs	1.9	stats[1]=get_disk_stats();
370	pajs	1.18	logmessage(LOG_DEBUG,"get_load_stats");
371	pajs	1.9	stats[2]=get_load_stats();
372	pajs	1.18	logmessage(LOG_DEBUG,"get_memory_stats");
373	pajs	1.9	stats[3]=get_memory_stats();
374	pajs	1.18	logmessage(LOG_DEBUG,"get_os_info");
375	pajs	1.9	stats[4]=get_os_info();
376	pajs	1.18	logmessage(LOG_DEBUG,"get_page_stats");
377	pajs	1.9	stats[5]=get_page_stats();
378	pajs	1.18	logmessage(LOG_DEBUG,"get_process_stats");
379	pajs	1.9	stats[6]=get_process_stats();
380	pajs	1.18	logmessage(LOG_DEBUG,"get_swap_stats");
381	pajs	1.9	stats[7]=get_swap_stats();
382	pajs	1.18	logmessage(LOG_DEBUG,"get_user_stats");
383	pajs	1.9	stats[8]=get_user_stats();
384	pajs	1.20
385	pajs	1.9
386	pajs	1.20	for(x=0;x<NUM_STATS;x++){
387	pajs	1.9	if(stats[x]==NULL){
388	pajs	1.18	logmessage(LOG_ERR,"Function returned NULL");
389	pajs	1.9	return NULL;
390			}
391	pajs	1.20	xml_size+=strlen(stats[x]);
392			}
393
394	pajs	1.22	xml_data=malloc(xml_size+1);
395	pajs	1.20	xml_data=strcpy(xml_data, stats[0]);
396	pajs	1.22	free(stats[0]);
397	pajs	1.20	for(x=1;x<NUM_STATS;x++){
398			strcat(xml_data, stats[x]);
399	pajs	1.22	free(stats[x]);
400	pajs	1.9	}
401	pajs	1.20
402	pajs	1.9	xml_data_p=xml_data;
403	pajs	1.16	xml_data=strf("<packet seq_no=\"%d\" machine_name=\"%s\" date=\"%ld\" type=\"data\" ip=\"%s\" key=\"%s\">%s</packet>", counter, ihost_state->my_fqdn, time(NULL), ihost_state->my_ip, ihost_state->key, xml_data);
404	pajs	1.9	free(xml_data_p);
405	pajs	1.18
406			logmessage(LOG_DEBUG,"Generated XML Data of : %s", xml_data);
407	pajs	1.9	return xml_data;
408			}
409
410			int send_stats(ihost_state_t ihost_state, char data_stream){
411			struct sockaddr_in addr;
412			struct in_addr haddr;
413
414			int sd;
415			size_t len;
416
417			len=strlen(data_stream);
418			if(len>UDP_MAX_PACKET_SIZE){
419	pajs	1.18	logmessage(LOG_ERR, "Too big to send to server. Please reconfigure client and server and recompile");
420	pajs	1.9	exit(1);
421			}
422	pajs	1.18	logmessage(LOG_DEBUG,"Resolving IP of server");
423	pajs	1.9	if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
424	pajs	1.18	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
425	pajs	1.9	return -1;
426			}
427	pajs	1.22	logmessage(LOG_DEBUG,"Creating UDP socket to %s on %d",ihost_state->server_fqdn, ihost_state->server_udp_port);
428	pajs	1.9	if((sd=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0){
429	pajs	1.18	logmessage(LOG_ERR, "failed to create UDP socket (%m)");
430	pajs	1.9	return -1;
431			}
432
433			memset(&addr, 0, sizeof(addr));
434			addr.sin_family=AF_INET;
435			memcpy((char *)&addr.sin_addr, &haddr, sizeof haddr);
436			addr.sin_port = htons(ihost_state->server_udp_port);
437
438	pajs	1.18	logmessage(LOG_INFO,"Sending packet : %s", data_stream);
439	pajs	1.9	if((sendto(sd, data_stream, len, 0, (struct sockaddr *) &addr, sizeof(addr))) != len){
440	pajs	1.18	logmessage(LOG_ERR, "Send the wrong number of bytes (%m)");
441	pajs	1.9	return -1;
442			}
443
444	pajs	1.10	close(sd);
445
446	pajs	1.9	return 0;
447			}
448	pajs	1.1
449	pajs	1.17	void usage(char *progname){
450			fprintf(stderr, "Usage %s [options] server port\n", progname);
451			fprintf(stderr, "Options\n");
452			fprintf(stderr, " -v Verbose, the more v flags the more verbose, eg -vv\n");
453			fprintf(stderr, " -d Daemon mode, self backgrounding\n");
454			fprintf(stderr, " -s Send errors to syslog\n");
455			fprintf(stderr, " -V Print version number\n");
456			fprintf(stderr, " -h Prints this help page\n");
457			exit(1);
458			}
459
460	pajs	1.3	int main(int argc, char **argv){
461	pajs	1.2	ihost_state_t ihost_state;
462	pajs	1.6	int heartbeat_exit;
463			int counter=0;
464	pajs	1.10	long udp_time=0, tcp_time=0, stat_grab_time=0, cur_time=0;
465	pajs	1.9	int sleep_delay=0;
466			char *xml_stats;
467	pajs	1.18	pid_t pid;
468	pajs	1.17	int cmdopt;
469			extern int optind;
470	pajs	1.18	int verbose=0, daemon=0;
471			extern int syslog_logging;
472			extern int log_level;
473			extern int cur_level;
474	pajs	1.19	FILE *f;
475	pajs	1.18
476			log_level=1;
477			cur_level=1;
478			syslog_logging=0;
479
480			errf_set_ofunc(log_errors);
481	pajs	1.5	/* NULL'ify so i can tell if i need to free it or not */
482			ihost_state.fm_host=NULL;
483			ihost_state.my_fqdn=NULL;
484			ihost_state.server_fqdn=NULL;
485			ihost_state.last_modified=NULL;
486			ihost_state.files_list=NULL;
487			ihost_state.key=NULL;
488
489	pajs	1.3	errf_set_progname(argv[0]);
490	pajs	1.18
491	pajs	1.17
492			while((cmdopt=getopt(argc, argv, "vdshV")) != -1){
493			switch(cmdopt){
494			case 'v':
495			verbose++;
496			break;
497
498			case 'd':
499	pajs	1.18	/* Force syslog logging since stderr will be closed in this case */
500			syslog_logging=1;
501	pajs	1.17	daemon=1;
502			break;
503
504			case 's':
505	pajs	1.18	syslog_logging=1;
506	pajs	1.17	break;
507
508			case 'h':
509			usage(argv[0]);
510			break;
511	pajs	1.18
512	pajs	1.17	case 'V':
513	pajs	1.22	errf("%s version %s",argv[0], VERSION_NO);
514	pajs	1.17	break;
515	pajs	1.18
516	pajs	1.17	default:
517			usage(argv[0]);
518			exit(1);
519			}
520			}
521
522			if(argc!=optind+2){
523			usage(argv[0]);
524	pajs	1.3	exit(1);
525			}
526	pajs	1.17	ihost_state.fm_host=argv[optind];
527			ihost_state.fm_port=atoi(argv[optind+1]);
528			if(ihost_state.fm_port==0){
529			errf("Invalid port number");
530			usage(argv[0]);
531			}
532	pajs	1.18
533			if(daemon==1){
534			pid=fork();
535			if(pid==-1){
536			errf("Fork failed, can't background. Exiting");
537			exit(1);
538			}else if(pid!=0){
539			/* Parent process */
540			return 0;
541			}
542			/* We should now be in the background*/
543			if(setsid()==-1){
544			errf("setsid failed (%m)");
545			exit(1);
546			}
547			fclose(stdin);
548			fclose(stdout);
549			fclose(stderr);
550			}
551
552			if(syslog_logging==1){
553			openlog(errf_get_progname(),0,LOG_ERR);
554			setlogmask(LOG_UPTO(LOG_DEBUG));
555			}
556
557			switch(verbose){
558			case 0:
559			/* Critical errors + */
560			log_level=LOG_ERR;
561			break;
562			case 1:
563			/* Recoverable errors */
564			log_level=LOG_WARNING;
565			break;
566			case 2:
567			/* Print stuff like the XML packets */
568			log_level=LOG_INFO;
569			break;
570			default:
571			/* Must have lots of v's */
572			/* Print out everything its doing */
573			log_level=LOG_DEBUG;
574			break;
575	pajs	1.19	}
576
577			logmessage(LOG_DEBUG,"Writing PID FILE");
578			pid=getpid();
579			if((f=fopen(PID_FILE,"w")) == NULL){
580			logmessage(LOG_WARNING, "Failed to write PID file");
581			}else{
582	pajs	1.22	if((fprintf(f,"%d",(int)pid)) > 0 ){
583	pajs	1.19	logmessage(LOG_WARNING, "Failed to write PID file");
584			}
585			if((fclose(f))!=0){
586			logmessage(LOG_ERR, "failed to close PID file");
587			exit(1);
588			}
589	pajs	1.18	}
590	pajs	1.2
591			if(ihost_configure(&ihost_state)!=0){
592	pajs	1.18	logmessage(LOG_ERR,"configure failed");
593	pajs	1.6	/* Ok, ideally we prob should have 2 copies of the structure and carry on if this
594			happens.. But we dont :) (at the moment) */
595			exit(1);
596	pajs	1.2	}
597	pajs	1.5
598	pajs	1.9	for(;;){
599			cur_time=time(NULL);
600			if(cur_time>=tcp_time){
601	pajs	1.18	logmessage(LOG_DEBUG,"Sending heartbeat");
602	pajs	1.9	heartbeat_exit=heartbeat(&ihost_state);
603			if(heartbeat_exit==RECONFIGURE_RETURN_CODE){
604	pajs	1.18	logmessage(LOG_INFO,"heartbeat needs to be reconfigured");
605	pajs	1.9	ihost_configure(&ihost_state);
606			udp_time=0;
607			}
608			if(heartbeat_exit==-1){
609	pajs	1.18	logmessage(LOG_ERR,"Heartbeat failed");
610	pajs	1.9	exit(1);
611			}
612			tcp_time=time(NULL)+ihost_state.tcp_update_time;
613	pajs	1.18	logmessage(LOG_DEBUG,"next tcp time should be %d", tcp_time);
614	pajs	1.9	}
615	pajs	1.10
616	pajs	1.9	if(cur_time>=udp_time){
617	pajs	1.18	logmessage(LOG_DEBUG,"Sending udp data");
618	pajs	1.22	/* Work out how long it takes to get the stats for next time round
619			so the sleep time can be adjusted accordingly */
620	pajs	1.10	stat_grab_time=time(NULL);
621	pajs	1.13	if((xml_stats=stat_grab(&ihost_state, counter++)) == NULL){
622	pajs	1.18	logmessage(LOG_ERR,"Failed to get stats (%m)");
623	pajs	1.9	exit(1);
624			}
625	pajs	1.10	stat_grab_time=time(NULL)-stat_grab_time;
626			send_stats(&ihost_state, xml_stats);
627			free(xml_stats);
628			udp_time=time(NULL)+ihost_state.udp_update_time-stat_grab_time;
629	pajs	1.18	logmessage(LOG_DEBUG,"next udp time should be %d", udp_time);
630	pajs	1.9	}
631	pajs	1.10
632			if(tcp_time<udp_time){
633			sleep_delay=tcp_time-time(NULL);
634	pajs	1.9	}else{
635	pajs	1.10	sleep_delay=udp_time-time(NULL);
636	pajs	1.6	}
637	pajs	1.18	logmessage(LOG_DEBUG,"Sleeping for %d", sleep_delay);
638	pajs	1.10	if(sleep_delay>0) sleep(sleep_delay);
639	pajs	1.6	}
640	pajs	1.1	return 0;
641			}
642