source/ihost/ihost.c

/* 
 * i-scream central monitoring system
 * 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 <netinet/in.h>
#include <arpa/inet.h>
#include <syslog.h>

#define versionNo 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;
        fprintf(f_w, "%s\n", sendString);
        fflush(f_w);
        reply=fpgetline(f_r);
        /* 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=inet_ntoa(((struct sockaddr_in *)&ip)->sin_addr))==NULL){
                logmessage(LOG_ERR, "Failed to get IP (%m)");
                return -1;
        }       
        
        logmessage(LOG_DEBUG, "Sending STARTCONIG");
        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;
        }

        logmessage(LOG_DEBUG, "Sending LASTMODIFIED");
        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;
        }

        logmessage(LOG_DEBUG, "Sending FILELIST");
        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;
        }

        logmessage(LOG_DEBUG, "Sending FQDN");
        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;
        }

        logmessage(LOG_DEBUG, "Sending FQDN");
        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);
        }
        
        logmessage(LOG_DEBUG, "Sending TCPUpdateTime");
        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);
        }

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

        logmessage(LOG_DEBUG, "Sending FILTER");
        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;
        }

        logmessage(LOG_DEBUG, "Sending END");
        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;
        }

        logmessage(LOG_DEBUG, "Sending HEARTBEAT");
        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;
        }

        logmessage(LOG_DEBUG, "Sending CONFIG");
        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;
        }

        logmessage(LOG_DEBUG, "Sending %s", ihost_state->files_list);
        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;
        }

        logmessage(LOG_DEBUG, "Sending %s", ihost_state->last_modified);
        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;
        }

        logmessage(LOG_DEBUG,"Sending KEY");
        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;
        }

        logmessage(LOG_DEBUG,"Sending ENDHEARTBEAT");
        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);
        xml_data=strcpy(xml_data, stats[0]);
        
        for(x=1;x<NUM_STATS;x++){
                strcat(xml_data, 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 connection 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 %f",argv[0], versionNo);
                                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)) != sizeof(pid)){
                        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");

                        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:	1.20
Committed:	Tue May 21 14:36:23 2002 UTC (22 years ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.19:	+12 -15 lines
Log Message:	Slightly more efficent
#	Content
1	/*
2	* i-scream central monitoring system
3	* Copyright (C) 2000-2002 i-scream
4	*
5	* This program is free software; you can redistribute it and/or
6	* modify it under the terms of the GNU General Public License
7	* as published by the Free Software Foundation; either version 2
8	* of the License, or (at your option) any later version.
9	*
10	* This program is distributed in the hope that it will be useful,
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	* GNU General Public License for more details.
14	*
15	* You should have received a copy of the GNU General Public License
16	* along with this program; if not, write to the Free Software
17	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18	*/
19
20	#include <stdio.h>
21	#include <stdlib.h>
22	#include <sys/types.h>
23	#include <unistd.h>
24	#include <syslog.h>
25	#include <netinet/in.h>
26	#include "ukcprog.h"
27	#include <netdb.h>
28	#include <string.h>
29	#include "statgrab.h"
30	#include <time.h>
31	#include <sys/socket.h>
32	#include <netinet/in.h>
33	#include <arpa/inet.h>
34	#include <syslog.h>
35
36	#define versionNo 0.8
37	#define RECONFIGURE_RETURN_CODE 2
38	#define UDP_MAX_PACKET_SIZE 8192
39	#define PID_FILE "/var/tmp/.ihost.pid"
40
41	#define logmessage(level, ...) do { cur_level = level; errf(__VA_ARGS__); } while (0)
42
43	typedef struct{
44	int fm_port;
45	char *fm_host;
46
47	char *my_ip;
48	char *my_fqdn;
49	char *server_fqdn;
50	int server_udp_port;
51	int server_tcp_port;
52	char *last_modified;
53	char *files_list;
54	char *key;
55	int udp_update_time;
56	int tcp_update_time;
57
58	}ihost_state_t;
59
60	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	char* sock_comm(FILE f_r, FILE f_w, char *sendString){
75	char *reply;
76	fprintf(f_w, "%s\n", sendString);
77	fflush(f_w);
78	reply=fpgetline(f_r);
79	/* Returns pointer to static buffer */
80	return reply;
81	}
82
83	int ihost_configure(ihost_state_t *ihost_state){
84	struct sockaddr_in addr;
85	struct in_addr haddr;
86	struct sockaddr ip;
87	int ip_len;
88	int sd;
89	FILE fm_fd_r, fm_fd_w;
90	char *reply;
91	char *reply_ptr;
92
93	/* Check to see if anything needs to be free'd */
94	if (ihost_state->my_fqdn!=NULL) free(ihost_state->my_fqdn);
95	if (ihost_state->server_fqdn!=NULL) free(ihost_state->server_fqdn);
96	if (ihost_state->last_modified!=NULL) free(ihost_state->last_modified);
97	if (ihost_state->files_list!=NULL) free(ihost_state->files_list);
98
99	logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->fm_host, ihost_state->fm_port);
100	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
101	logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
102	return -1;
103	}
104
105	if (get_host_addr(ihost_state->fm_host, &haddr) != 0){
106	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->fm_host);
107	return -1;
108	}
109
110	memset(&addr, 0, sizeof addr);
111	addr.sin_family = AF_INET;
112	memcpy(&addr.sin_addr, &haddr, sizeof haddr);
113	addr.sin_port = htons(ihost_state->fm_port);
114
115	if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
116	logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->fm_host, ihost_state->fm_port);
117	return -1;
118	}
119
120	/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
121	if ((fm_fd_r=fdopen(sd,"r")) == NULL){
122	logmessage(LOG_ERR, "Failed to open read stream (%m)");
123	return -1;
124	}
125
126	if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
127	logmessage(LOG_ERR, "Failed to open write stream (%m)");
128	return -1;
129	}
130	ip_len=sizeof ip;
131	memset(&ip, 0, ip_len);
132	if((getsockname(sd, &ip, &ip_len)) != 0){
133	logmessage(LOG_ERR, "Failed to get IP address (%m)");
134	return -1;
135	}
136	if (ip.sa_family!=AF_INET){
137	logmessage(LOG_ERR, "sa family is wrong type");
138	return -1;
139	}
140
141	if((ihost_state->my_ip=inet_ntoa(((struct sockaddr_in *)&ip)->sin_addr))==NULL){
142	logmessage(LOG_ERR, "Failed to get IP (%m)");
143	return -1;
144	}
145
146	logmessage(LOG_DEBUG, "Sending STARTCONIG");
147	reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG");
148	if ((reply==NULL) \|\| (strncasecmp(reply, "OK", 2) != 0) ) {
149	logmessage(LOG_ERR, "Server error on STARTCONFIG");
150	return -1;
151	}
152
153	logmessage(LOG_DEBUG, "Sending LASTMODIFIED");
154	reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED");
155	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0)){
156	logmessage(LOG_ERR, "Server error on LASTMODIFIED (%m)");
157	return -1;
158	}
159	if((ihost_state->last_modified=strdup(reply)) == NULL){
160	logmessage(LOG_ERR, "strdup failed (%m)");
161	return -1;
162	}
163
164	logmessage(LOG_DEBUG, "Sending FILELIST");
165	reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST");
166	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0)){
167	logmessage(LOG_ERR, "Server error on FILELIST (%m)");
168	return -1;
169	}
170	if((ihost_state->files_list=strdup(reply)) == NULL){
171	logmessage(LOG_ERR, "strdup failed (%m)");
172	return -1;
173	}
174
175	logmessage(LOG_DEBUG, "Sending FQDN");
176	reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN");
177	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5)==0)){
178	logmessage(LOG_ERR, "Server error on FQDN (%m)");
179	return -1;
180	}
181	if((ihost_state->my_fqdn=strdup(reply)) == NULL){
182	logmessage(LOG_ERR, "strdup failed (%m)");
183	return -1;
184	}
185
186	logmessage(LOG_DEBUG, "Sending FQDN");
187	reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime");
188	if(reply== NULL){
189	logmessage(LOG_ERR, "Server error (%m)");
190	return -1;
191	}
192	if (strncasecmp(reply, "ERROR", 5) != 0){
193	ihost_state->udp_update_time=atoi(reply);
194	}
195
196	logmessage(LOG_DEBUG, "Sending TCPUpdateTime");
197	reply=sock_comm(fm_fd_r, fm_fd_w, "TCPUpdateTime");
198	if(reply== NULL){
199	logmessage(LOG_ERR, "Server error on TCPUpdateTime (%m)");
200	return -1;
201	}
202	if (strncasecmp(reply, "ERROR", 5) != 0){
203	ihost_state->tcp_update_time=atoi(reply);
204	}
205
206	logmessage(LOG_DEBUG, "Sending ENDCONFIG");
207	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG");
208	if(reply== NULL){
209	logmessage(LOG_ERR, "Server error on ENDCONFIG (%m)");
210	return -1;
211	}
212
213	logmessage(LOG_DEBUG, "Sending FILTER");
214	reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER");
215	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5)==0)){
216	logmessage(LOG_ERR, "Server error FILTER failed (%m)");
217	return -1;
218	}
219	reply_ptr=strchr(reply,';');
220	if (reply_ptr==NULL){
221	logmessage(LOG_ERR, "Incorrect data returned");
222	return -1;
223	}
224	*reply_ptr='\0';
225	if((ihost_state->server_fqdn=strdup(reply)) == NULL){
226	logmessage(LOG_ERR, "strdup failed (%m)");
227	return -1;
228	}
229	reply=reply_ptr + 1;
230	reply_ptr=strchr(reply,';');
231	if (reply_ptr==NULL){
232	logmessage(LOG_ERR, "Incorrect data returned 2");
233	return -1;
234	}
235	*reply_ptr='\0';
236	ihost_state->server_udp_port=atoi(reply);
237	reply=reply_ptr+1;
238	ihost_state->server_tcp_port=atoi(reply);
239	if ((ihost_state->server_tcp_port==0) \|\| (ihost_state->server_udp_port==0)){
240	logmessage(LOG_ERR, "Incorrect data returned 3 ");
241	return -1;
242	}
243
244	logmessage(LOG_DEBUG, "Sending END");
245	reply=sock_comm(fm_fd_r, fm_fd_w, "END");
246	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0 )){
247	logmessage(LOG_ERR, "Server error on END (%m)");
248	return -1;
249	}
250
251	if(fclose(fm_fd_r) !=0){
252	logmessage(LOG_ERR, "Failed to close read FD (%m)");
253	return -1;
254	}
255	if(fclose(fm_fd_w) !=0){
256	logmessage(LOG_ERR, "Failed to close write FD (%m)");
257	return -1;
258	}
259
260	return 0;
261	}
262
263	int heartbeat(ihost_state_t *ihost_state){
264	struct sockaddr_in addr;
265	struct in_addr haddr;
266	int sd;
267	FILE fm_fd_r, fm_fd_w;
268	char *reply;
269	int exitcode=0;
270
271	logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->server_fqdn, ihost_state->server_tcp_port);
272	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
273	logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
274	return -1;
275	}
276
277	if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
278	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
279	return -1;
280	}
281
282	memset(&addr, 0, sizeof addr);
283	addr.sin_family = AF_INET;
284	memcpy(&addr.sin_addr, &haddr, sizeof haddr);
285	addr.sin_port = htons(ihost_state->server_tcp_port);
286
287	if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
288	logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->server_fqdn, ihost_state->server_tcp_port);
289	return -1;
290	}
291
292	/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
293	if ((fm_fd_r=fdopen(sd,"r")) == NULL){
294	logmessage(LOG_ERR, "Failed to open stream (%m)");
295	return -1;
296	}
297
298	if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
299	logmessage(LOG_ERR, "Failed to open stream (%m)");
300	return -1;
301	}
302
303	logmessage(LOG_DEBUG, "Sending HEARTBEAT");
304	reply=sock_comm(fm_fd_r, fm_fd_w, "HEARTBEAT");
305	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
306	logmessage(LOG_ERR, "Server error on HEARTBEAT");
307	return -1;
308	}
309
310	logmessage(LOG_DEBUG, "Sending CONFIG");
311	reply=sock_comm(fm_fd_r, fm_fd_w, "CONFIG");
312	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
313	logmessage(LOG_ERR, "Server error on CONFIG");
314	return -1;
315	}
316
317	logmessage(LOG_DEBUG, "Sending %s", ihost_state->files_list);
318	reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->files_list);
319	if ((reply==NULL) \|\| (strncasecmp(reply, "OK", 2) != 0) ) {
320	logmessage(LOG_ERR, "Server error on fileslist");
321	return -1;
322	}
323
324	logmessage(LOG_DEBUG, "Sending %s", ihost_state->last_modified);
325	reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->last_modified);
326	if (reply==NULL) {
327	logmessage(LOG_ERR, "Server error NULL recieved on lastmodified");
328	return -1;
329	}
330	if (strncasecmp(reply, "ERROR", 5) == 0){
331	/* Means the config has changed */
332	logmessage(LOG_INFO, "Recieved ERROR from server for a reconfigure required");
333	exitcode=RECONFIGURE_RETURN_CODE;
334	}
335
336	logmessage(LOG_DEBUG,"Sending KEY");
337	reply=sock_comm(fm_fd_r, fm_fd_w, "KEY");
338	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
339	logmessage(LOG_ERR, "Server error on KEY");
340	return -1;
341	}
342	if (ihost_state->key!=NULL) free(ihost_state->key);
343
344	if((ihost_state->key=strdup(reply)) == NULL){
345	logmessage(LOG_ERR, "strdup failed (%m)");
346	return -1;
347	}
348
349	logmessage(LOG_DEBUG,"Sending ENDHEARTBEAT");
350	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDHEARTBEAT");
351	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0 )){
352	logmessage(LOG_ERR, "Server error on ENDHEARTBEAT (%m)");
353	return -1;
354	}
355
356	fflush(fm_fd_r);
357	fflush(fm_fd_w);
358
359	if(fclose(fm_fd_r) !=0){
360	logmessage(LOG_ERR, "Failed to close read FD (%m)");
361	return -1;
362	}
363	if(fclose(fm_fd_w) !=0){
364	logmessage(LOG_ERR, "Failed to close write FD (%m)");
365	return -1;
366	}
367
368	return exitcode;
369	}
370
371	char stat_grab(ihost_state_t ihost_state, int counter){
372	#define NUM_STATS 9
373	char *stats[NUM_STATS];
374	char *xml_data=NULL;
375	char *xml_data_p;
376	int xml_size=0;
377	int x=0;
378
379	logmessage(LOG_DEBUG,"get_cpu_stats");
380	stats[0]=get_cpu_stats();
381	logmessage(LOG_DEBUG,"get_disk_stats");
382	stats[1]=get_disk_stats();
383	logmessage(LOG_DEBUG,"get_load_stats");
384	stats[2]=get_load_stats();
385	logmessage(LOG_DEBUG,"get_memory_stats");
386	stats[3]=get_memory_stats();
387	logmessage(LOG_DEBUG,"get_os_info");
388	stats[4]=get_os_info();
389	logmessage(LOG_DEBUG,"get_page_stats");
390	stats[5]=get_page_stats();
391	logmessage(LOG_DEBUG,"get_process_stats");
392	stats[6]=get_process_stats();
393	logmessage(LOG_DEBUG,"get_swap_stats");
394	stats[7]=get_swap_stats();
395	logmessage(LOG_DEBUG,"get_user_stats");
396	stats[8]=get_user_stats();
397
398
399	for(x=0;x<NUM_STATS;x++){
400	if(stats[x]==NULL){
401	logmessage(LOG_ERR,"Function returned NULL");
402	return NULL;
403	}
404	xml_size+=strlen(stats[x]);
405	}
406
407	xml_data=malloc(xml_size);
408	xml_data=strcpy(xml_data, stats[0]);
409
410	for(x=1;x<NUM_STATS;x++){
411	strcat(xml_data, stats[x]);
412	}
413
414	xml_data_p=xml_data;
415	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);
416	free(xml_data_p);
417
418	logmessage(LOG_DEBUG,"Generated XML Data of : %s", xml_data);
419	return xml_data;
420	}
421
422	int send_stats(ihost_state_t ihost_state, char data_stream){
423	struct sockaddr_in addr;
424	struct in_addr haddr;
425
426	int sd;
427	size_t len;
428
429	len=strlen(data_stream);
430	if(len>UDP_MAX_PACKET_SIZE){
431	logmessage(LOG_ERR, "Too big to send to server. Please reconfigure client and server and recompile");
432	exit(1);
433	}
434	logmessage(LOG_DEBUG,"Resolving IP of server");
435	if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
436	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
437	return -1;
438	}
439	logmessage(LOG_DEBUG,"Creating UDP connection to %s on %d",ihost_state->server_fqdn, ihost_state->server_udp_port);
440	if((sd=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0){
441	logmessage(LOG_ERR, "failed to create UDP socket (%m)");
442	return -1;
443	}
444
445	memset(&addr, 0, sizeof(addr));
446	addr.sin_family=AF_INET;
447	memcpy((char *)&addr.sin_addr, &haddr, sizeof haddr);
448	addr.sin_port = htons(ihost_state->server_udp_port);
449
450	logmessage(LOG_INFO,"Sending packet : %s", data_stream);
451	if((sendto(sd, data_stream, len, 0, (struct sockaddr *) &addr, sizeof(addr))) != len){
452	logmessage(LOG_ERR, "Send the wrong number of bytes (%m)");
453	return -1;
454	}
455
456	close(sd);
457
458	return 0;
459	}
460
461	void usage(char *progname){
462	fprintf(stderr, "Usage %s [options] server port\n", progname);
463	fprintf(stderr, "Options\n");
464	fprintf(stderr, " -v Verbose, the more v flags the more verbose, eg -vv\n");
465	fprintf(stderr, " -d Daemon mode, self backgrounding\n");
466	fprintf(stderr, " -s Send errors to syslog\n");
467	fprintf(stderr, " -V Print version number\n");
468	fprintf(stderr, " -h Prints this help page\n");
469	exit(1);
470	}
471
472	int main(int argc, char **argv){
473	ihost_state_t ihost_state;
474	int heartbeat_exit;
475	int counter=0;
476	long udp_time=0, tcp_time=0, stat_grab_time=0, cur_time=0;
477	int sleep_delay=0;
478	char *xml_stats;
479	pid_t pid;
480	int cmdopt;
481	extern int optind;
482	int verbose=0, daemon=0;
483	extern int syslog_logging;
484	extern int log_level;
485	extern int cur_level;
486	FILE *f;
487
488	log_level=1;
489	cur_level=1;
490	syslog_logging=0;
491
492	errf_set_ofunc(log_errors);
493	/* NULL'ify so i can tell if i need to free it or not */
494	ihost_state.fm_host=NULL;
495	ihost_state.my_fqdn=NULL;
496	ihost_state.server_fqdn=NULL;
497	ihost_state.last_modified=NULL;
498	ihost_state.files_list=NULL;
499	ihost_state.key=NULL;
500
501	errf_set_progname(argv[0]);
502
503
504	while((cmdopt=getopt(argc, argv, "vdshV")) != -1){
505	switch(cmdopt){
506	case 'v':
507	verbose++;
508	break;
509
510	case 'd':
511	/* Force syslog logging since stderr will be closed in this case */
512	syslog_logging=1;
513	daemon=1;
514	break;
515
516	case 's':
517	syslog_logging=1;
518	break;
519
520	case 'h':
521	usage(argv[0]);
522	break;
523
524	case 'V':
525	errf("%s version %f",argv[0], versionNo);
526	break;
527
528	default:
529	usage(argv[0]);
530	exit(1);
531	}
532	}
533
534	if(argc!=optind+2){
535	usage(argv[0]);
536	exit(1);
537	}
538	ihost_state.fm_host=argv[optind];
539	ihost_state.fm_port=atoi(argv[optind+1]);
540	if(ihost_state.fm_port==0){
541	errf("Invalid port number");
542	usage(argv[0]);
543	}
544
545	if(daemon==1){
546	pid=fork();
547	if(pid==-1){
548	errf("Fork failed, can't background. Exiting");
549	exit(1);
550	}else if(pid!=0){
551	/* Parent process */
552	return 0;
553	}
554	/* We should now be in the background*/
555	if(setsid()==-1){
556	errf("setsid failed (%m)");
557	exit(1);
558	}
559	fclose(stdin);
560	fclose(stdout);
561	fclose(stderr);
562	}
563
564	if(syslog_logging==1){
565	openlog(errf_get_progname(),0,LOG_ERR);
566	setlogmask(LOG_UPTO(LOG_DEBUG));
567	}
568
569	switch(verbose){
570	case 0:
571	/* Critical errors + */
572	log_level=LOG_ERR;
573	break;
574	case 1:
575	/* Recoverable errors */
576	log_level=LOG_WARNING;
577	break;
578	case 2:
579	/* Print stuff like the XML packets */
580	log_level=LOG_INFO;
581	break;
582	default:
583	/* Must have lots of v's */
584	/* Print out everything its doing */
585	log_level=LOG_DEBUG;
586	break;
587	}
588
589	logmessage(LOG_DEBUG,"Writing PID FILE");
590	pid=getpid();
591	if((f=fopen(PID_FILE,"w")) == NULL){
592	logmessage(LOG_WARNING, "Failed to write PID file");
593	}else{
594	if((fprintf(f,"%d",(int)pid)) != sizeof(pid)){
595	logmessage(LOG_WARNING, "Failed to write PID file");
596	}
597	if((fclose(f))!=0){
598	logmessage(LOG_ERR, "failed to close PID file");
599	exit(1);
600	}
601	}
602
603	if(ihost_configure(&ihost_state)!=0){
604	logmessage(LOG_ERR,"configure failed");
605	/* Ok, ideally we prob should have 2 copies of the structure and carry on if this
606	happens.. But we dont :) (at the moment) */
607	exit(1);
608	}
609
610	for(;;){
611	cur_time=time(NULL);
612	if(cur_time>=tcp_time){
613	logmessage(LOG_DEBUG,"Sending heartbeat");
614	heartbeat_exit=heartbeat(&ihost_state);
615	if(heartbeat_exit==RECONFIGURE_RETURN_CODE){
616	logmessage(LOG_INFO,"heartbeat needs to be reconfigured");
617	ihost_configure(&ihost_state);
618	udp_time=0;
619	}
620	if(heartbeat_exit==-1){
621	logmessage(LOG_ERR,"Heartbeat failed");
622	exit(1);
623	}
624	tcp_time=time(NULL)+ihost_state.tcp_update_time;
625	logmessage(LOG_DEBUG,"next tcp time should be %d", tcp_time);
626	}
627
628	if(cur_time>=udp_time){
629	logmessage(LOG_DEBUG,"Sending udp data");
630
631	stat_grab_time=time(NULL);
632	if((xml_stats=stat_grab(&ihost_state, counter++)) == NULL){
633	logmessage(LOG_ERR,"Failed to get stats (%m)");
634	exit(1);
635	}
636	stat_grab_time=time(NULL)-stat_grab_time;
637	send_stats(&ihost_state, xml_stats);
638	free(xml_stats);
639	udp_time=time(NULL)+ihost_state.udp_update_time-stat_grab_time;
640	logmessage(LOG_DEBUG,"next udp time should be %d", udp_time);
641	}
642
643	if(tcp_time<udp_time){
644	sleep_delay=tcp_time-time(NULL);
645	}else{
646	sleep_delay=udp_time-time(NULL);
647	}
648	logmessage(LOG_DEBUG,"Sleeping for %d", sleep_delay);
649	if(sleep_delay>0) sleep(sleep_delay);
650	}
651	return 0;
652	}
653