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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#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 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!=NULL) free(ihost_state->my_ip);  
        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;
        ihost_state.my_ip=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);
                                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 (%m)");
        }else{
                if((fprintf(f,"%d",(int)pid)) <= 0 ){
                        logmessage(LOG_WARNING, "Failed to write PID file (%m)");
                }
                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:	1.26
Committed:	Wed May 29 19:41:59 2002 UTC (21 years, 11 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.25:	+5 -2 lines
Log Message:	This ihost now uses autoconf and automake to make a "normal" installation and distribution ;) It's now far easier to compile. To build from CVS :- aclocal autoheader autoconf automake -a -c Then for compiling (end users will only need to do this) :- ./configure make make install To build a distribution :- make dist
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org.uk
4	* 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	#ifdef HAVE_CONFIG_H
22	#include "config.h"
23	#endif
24
25	#include <stdio.h>
26	#include <stdlib.h>
27	#include <sys/types.h>
28	#include <unistd.h>
29	#include <syslog.h>
30	#include <netinet/in.h>
31	#include "ukcprog.h"
32	#include <netdb.h>
33	#include <string.h>
34	#include "statgrab.h"
35	#include <time.h>
36	#include <sys/socket.h>
37	#include <arpa/inet.h>
38	#include <syslog.h>
39
40	#define RECONFIGURE_RETURN_CODE 2
41	#define UDP_MAX_PACKET_SIZE 8192
42	#define PID_FILE "/var/tmp/.ihost.pid"
43
44	#define logmessage(level, ...) do { cur_level = level; errf(__VA_ARGS__); } while (0)
45
46	typedef struct{
47	int fm_port;
48	char *fm_host;
49
50	char *my_ip;
51	char *my_fqdn;
52	char *server_fqdn;
53	int server_udp_port;
54	int server_tcp_port;
55	char *last_modified;
56	char *files_list;
57	char *key;
58	int udp_update_time;
59	int tcp_update_time;
60
61	}ihost_state_t;
62
63	static int log_level;
64	static int cur_level;
65	static int syslog_logging;
66
67	void log_errors(const char *message){
68	if(log_level>=cur_level){
69	if (syslog_logging==1){
70	syslog(cur_level, "%s\n", message);
71	}else{
72	fprintf(stderr, "%s\n", message);
73	}
74	}
75	}
76
77	char* sock_comm(FILE f_r, FILE f_w, char *sendString){
78	char *reply;
79	logmessage(LOG_DEBUG, "Sending %s",sendString);
80	fprintf(f_w, "%s\n", sendString);
81	fflush(f_w);
82	reply=fpgetline(f_r);
83	if (reply!=NULL) logmessage(LOG_DEBUG, "Received %s", reply);
84	/* Returns pointer to static buffer */
85	return reply;
86	}
87
88	int ihost_configure(ihost_state_t *ihost_state){
89	struct sockaddr_in addr;
90	struct in_addr haddr;
91	struct sockaddr ip;
92	int ip_len;
93	int sd;
94	FILE fm_fd_r, fm_fd_w;
95	char *reply;
96	char *reply_ptr;
97
98	/* Check to see if anything needs to be free'd */
99	if (ihost_state->my_fqdn!=NULL) free(ihost_state->my_fqdn);
100	if (ihost_state->server_fqdn!=NULL) free(ihost_state->server_fqdn);
101	if (ihost_state->last_modified!=NULL) free(ihost_state->last_modified);
102	if (ihost_state->files_list!=NULL) free(ihost_state->files_list);
103
104	logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->fm_host, ihost_state->fm_port);
105	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
106	logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
107	return -1;
108	}
109
110	if (get_host_addr(ihost_state->fm_host, &haddr) != 0){
111	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->fm_host);
112	return -1;
113	}
114
115	memset(&addr, 0, sizeof addr);
116	addr.sin_family = AF_INET;
117	memcpy(&addr.sin_addr, &haddr, sizeof haddr);
118	addr.sin_port = htons(ihost_state->fm_port);
119
120	if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
121	logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->fm_host, ihost_state->fm_port);
122	return -1;
123	}
124
125	/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
126	if ((fm_fd_r=fdopen(sd,"r")) == NULL){
127	logmessage(LOG_ERR, "Failed to open read stream (%m)");
128	return -1;
129	}
130
131	if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
132	logmessage(LOG_ERR, "Failed to open write stream (%m)");
133	return -1;
134	}
135	ip_len=sizeof ip;
136	memset(&ip, 0, ip_len);
137	if((getsockname(sd, &ip, &ip_len)) != 0){
138	logmessage(LOG_ERR, "Failed to get IP address (%m)");
139	return -1;
140	}
141	if (ip.sa_family!=AF_INET){
142	logmessage(LOG_ERR, "sa family is wrong type");
143	return -1;
144	}
145
146	if(ihost_state->my_ip!=NULL) free(ihost_state->my_ip);
147	if((ihost_state->my_ip=strdup(inet_ntoa(((struct sockaddr_in *)&ip)->sin_addr)))==NULL){
148	logmessage(LOG_ERR, "Failed to get IP (%m)");
149	return -1;
150	}
151
152	reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG");
153	if ((reply==NULL) \|\| (strncasecmp(reply, "OK", 2) != 0) ) {
154	logmessage(LOG_ERR, "Server error on STARTCONFIG");
155	return -1;
156	}
157
158	reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED");
159	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0)){
160	logmessage(LOG_ERR, "Server error on LASTMODIFIED (%m)");
161	return -1;
162	}
163	if((ihost_state->last_modified=strdup(reply)) == NULL){
164	logmessage(LOG_ERR, "strdup failed (%m)");
165	return -1;
166	}
167
168	reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST");
169	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0)){
170	logmessage(LOG_ERR, "Server error on FILELIST (%m)");
171	return -1;
172	}
173	if((ihost_state->files_list=strdup(reply)) == NULL){
174	logmessage(LOG_ERR, "strdup failed (%m)");
175	return -1;
176	}
177
178	reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN");
179	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5)==0)){
180	logmessage(LOG_ERR, "Server error on FQDN (%m)");
181	return -1;
182	}
183	if((ihost_state->my_fqdn=strdup(reply)) == NULL){
184	logmessage(LOG_ERR, "strdup failed (%m)");
185	return -1;
186	}
187
188	reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime");
189	if(reply== NULL){
190	logmessage(LOG_ERR, "Server error (%m)");
191	return -1;
192	}
193	if (strncasecmp(reply, "ERROR", 5) != 0){
194	ihost_state->udp_update_time=atoi(reply);
195	}
196
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	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG");
207	if(reply== NULL){
208	logmessage(LOG_ERR, "Server error on ENDCONFIG (%m)");
209	return -1;
210	}
211
212	reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER");
213	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5)==0)){
214	logmessage(LOG_ERR, "Server error FILTER failed (%m)");
215	return -1;
216	}
217	reply_ptr=strchr(reply,';');
218	if (reply_ptr==NULL){
219	logmessage(LOG_ERR, "Incorrect data returned");
220	return -1;
221	}
222	*reply_ptr='\0';
223	if((ihost_state->server_fqdn=strdup(reply)) == NULL){
224	logmessage(LOG_ERR, "strdup failed (%m)");
225	return -1;
226	}
227	reply=reply_ptr + 1;
228	reply_ptr=strchr(reply,';');
229	if (reply_ptr==NULL){
230	logmessage(LOG_ERR, "Incorrect data returned 2");
231	return -1;
232	}
233	*reply_ptr='\0';
234	ihost_state->server_udp_port=atoi(reply);
235	reply=reply_ptr+1;
236	ihost_state->server_tcp_port=atoi(reply);
237	if ((ihost_state->server_tcp_port==0) \|\| (ihost_state->server_udp_port==0)){
238	logmessage(LOG_ERR, "Incorrect data returned 3 ");
239	return -1;
240	}
241
242	reply=sock_comm(fm_fd_r, fm_fd_w, "END");
243	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0 )){
244	logmessage(LOG_ERR, "Server error on END (%m)");
245	return -1;
246	}
247
248	if(fclose(fm_fd_r) !=0){
249	logmessage(LOG_ERR, "Failed to close read FD (%m)");
250	return -1;
251	}
252	if(fclose(fm_fd_w) !=0){
253	logmessage(LOG_ERR, "Failed to close write FD (%m)");
254	return -1;
255	}
256
257	return 0;
258	}
259
260	int heartbeat(ihost_state_t *ihost_state){
261	struct sockaddr_in addr;
262	struct in_addr haddr;
263	int sd;
264	FILE fm_fd_r, fm_fd_w;
265	char *reply;
266	int exitcode=0;
267
268	logmessage(LOG_DEBUG, "Setting up configure socket to %s on port %d", ihost_state->server_fqdn, ihost_state->server_tcp_port);
269	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
270	logmessage(LOG_ERR, "Can't create AF_INET socket (%m)");
271	return -1;
272	}
273
274	if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
275	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
276	return -1;
277	}
278
279	memset(&addr, 0, sizeof addr);
280	addr.sin_family = AF_INET;
281	memcpy(&addr.sin_addr, &haddr, sizeof haddr);
282	addr.sin_port = htons(ihost_state->server_tcp_port);
283
284	if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
285	logmessage(LOG_ERR, "Failed to connect to %s on port %d (%m)", ihost_state->server_fqdn, ihost_state->server_tcp_port);
286	return -1;
287	}
288
289	/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
290	if ((fm_fd_r=fdopen(sd,"r")) == NULL){
291	logmessage(LOG_ERR, "Failed to open stream (%m)");
292	return -1;
293	}
294
295	if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
296	logmessage(LOG_ERR, "Failed to open stream (%m)");
297	return -1;
298	}
299
300	reply=sock_comm(fm_fd_r, fm_fd_w, "HEARTBEAT");
301	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
302	logmessage(LOG_ERR, "Server error on HEARTBEAT");
303	return -1;
304	}
305
306	reply=sock_comm(fm_fd_r, fm_fd_w, "CONFIG");
307	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
308	logmessage(LOG_ERR, "Server error on CONFIG");
309	return -1;
310	}
311
312	reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->files_list);
313	if ((reply==NULL) \|\| (strncasecmp(reply, "OK", 2) != 0) ) {
314	logmessage(LOG_ERR, "Server error on fileslist");
315	return -1;
316	}
317
318	reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->last_modified);
319	if (reply==NULL) {
320	logmessage(LOG_ERR, "Server error NULL recieved on lastmodified");
321	return -1;
322	}
323	if (strncasecmp(reply, "ERROR", 5) == 0){
324	/* Means the config has changed */
325	logmessage(LOG_INFO, "Recieved ERROR from server for a reconfigure required");
326	exitcode=RECONFIGURE_RETURN_CODE;
327	}
328
329	reply=sock_comm(fm_fd_r, fm_fd_w, "KEY");
330	if ((reply==NULL) \|\| (strncasecmp(reply, "ERROR", 5) == 0) ) {
331	logmessage(LOG_ERR, "Server error on KEY");
332	return -1;
333	}
334	if (ihost_state->key!=NULL) free(ihost_state->key);
335
336	if((ihost_state->key=strdup(reply)) == NULL){
337	logmessage(LOG_ERR, "strdup failed (%m)");
338	return -1;
339	}
340
341	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDHEARTBEAT");
342	if((reply== NULL) \|\| (strncasecmp(reply, "ERROR", 5) ==0 )){
343	logmessage(LOG_ERR, "Server error on ENDHEARTBEAT (%m)");
344	return -1;
345	}
346
347	fflush(fm_fd_r);
348	fflush(fm_fd_w);
349
350	if(fclose(fm_fd_r) !=0){
351	logmessage(LOG_ERR, "Failed to close read FD (%m)");
352	return -1;
353	}
354	if(fclose(fm_fd_w) !=0){
355	logmessage(LOG_ERR, "Failed to close write FD (%m)");
356	return -1;
357	}
358
359	return exitcode;
360	}
361
362	char stat_grab(ihost_state_t ihost_state, int counter){
363	#define NUM_STATS 9
364	char *stats[NUM_STATS];
365	char *xml_data=NULL;
366	char *xml_data_p;
367	int xml_size=0;
368	int x=0;
369
370	logmessage(LOG_DEBUG,"get_cpu_stats");
371	stats[0]=get_cpu_stats();
372	logmessage(LOG_DEBUG,"get_disk_stats");
373	stats[1]=get_disk_stats();
374	logmessage(LOG_DEBUG,"get_load_stats");
375	stats[2]=get_load_stats();
376	logmessage(LOG_DEBUG,"get_memory_stats");
377	stats[3]=get_memory_stats();
378	logmessage(LOG_DEBUG,"get_os_info");
379	stats[4]=get_os_info();
380	logmessage(LOG_DEBUG,"get_page_stats");
381	stats[5]=get_page_stats();
382	logmessage(LOG_DEBUG,"get_process_stats");
383	stats[6]=get_process_stats();
384	logmessage(LOG_DEBUG,"get_swap_stats");
385	stats[7]=get_swap_stats();
386	logmessage(LOG_DEBUG,"get_user_stats");
387	stats[8]=get_user_stats();
388
389
390	for(x=0;x<NUM_STATS;x++){
391	if(stats[x]==NULL){
392	logmessage(LOG_ERR,"Function returned NULL");
393	return NULL;
394	}
395	xml_size+=strlen(stats[x]);
396	}
397
398	xml_data=malloc(xml_size+1);
399	xml_data=strcpy(xml_data, stats[0]);
400	free(stats[0]);
401	for(x=1;x<NUM_STATS;x++){
402	strcat(xml_data, stats[x]);
403	free(stats[x]);
404	}
405
406	xml_data_p=xml_data;
407	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);
408	free(xml_data_p);
409
410	logmessage(LOG_DEBUG,"Generated XML Data of : %s", xml_data);
411	return xml_data;
412	}
413
414	int send_stats(ihost_state_t ihost_state, char data_stream){
415	struct sockaddr_in addr;
416	struct in_addr haddr;
417
418	int sd;
419	size_t len;
420
421	len=strlen(data_stream);
422	if(len>UDP_MAX_PACKET_SIZE){
423	logmessage(LOG_ERR, "Too big to send to server. Please reconfigure client and server and recompile");
424	exit(1);
425	}
426	logmessage(LOG_DEBUG,"Resolving IP of server");
427	if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
428	logmessage(LOG_ERR, "Failed to resolve address %s (%m)", ihost_state->server_fqdn);
429	return -1;
430	}
431	logmessage(LOG_DEBUG,"Creating UDP socket to %s on %d",ihost_state->server_fqdn, ihost_state->server_udp_port);
432	if((sd=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0){
433	logmessage(LOG_ERR, "failed to create UDP socket (%m)");
434	return -1;
435	}
436
437	memset(&addr, 0, sizeof(addr));
438	addr.sin_family=AF_INET;
439	memcpy((char *)&addr.sin_addr, &haddr, sizeof haddr);
440	addr.sin_port = htons(ihost_state->server_udp_port);
441
442	logmessage(LOG_INFO,"Sending packet : %s", data_stream);
443	if((sendto(sd, data_stream, len, 0, (struct sockaddr *) &addr, sizeof(addr))) != len){
444	logmessage(LOG_ERR, "Send the wrong number of bytes (%m)");
445	return -1;
446	}
447
448	close(sd);
449
450	return 0;
451	}
452
453	void usage(char *progname){
454	fprintf(stderr, "Usage %s [options] server port\n", progname);
455	fprintf(stderr, "Options\n");
456	fprintf(stderr, " -v Verbose, the more v flags the more verbose, eg -vv\n");
457	fprintf(stderr, " -d Daemon mode, self backgrounding\n");
458	fprintf(stderr, " -s Send errors to syslog\n");
459	fprintf(stderr, " -V Print version number\n");
460	fprintf(stderr, " -h Prints this help page\n");
461	exit(1);
462	}
463
464	int main(int argc, char **argv){
465	ihost_state_t ihost_state;
466	int heartbeat_exit;
467	int counter=0;
468	long udp_time=0, tcp_time=0, stat_grab_time=0, cur_time=0;
469	int sleep_delay=0;
470	char *xml_stats;
471	pid_t pid;
472	int cmdopt;
473	extern int optind;
474	int verbose=0, daemon=0;
475	extern int syslog_logging;
476	extern int log_level;
477	extern int cur_level;
478	FILE *f;
479
480	log_level=1;
481	cur_level=1;
482	syslog_logging=0;
483
484	errf_set_ofunc(log_errors);
485	/* NULL'ify so i can tell if i need to free it or not */
486	ihost_state.fm_host=NULL;
487	ihost_state.my_fqdn=NULL;
488	ihost_state.server_fqdn=NULL;
489	ihost_state.last_modified=NULL;
490	ihost_state.files_list=NULL;
491	ihost_state.key=NULL;
492	ihost_state.my_ip=NULL;
493
494	errf_set_progname(argv[0]);
495
496
497	while((cmdopt=getopt(argc, argv, "vdshV")) != -1){
498	switch(cmdopt){
499	case 'v':
500	verbose++;
501	break;
502
503	case 'd':
504	/* Force syslog logging since stderr will be closed in this case */
505	syslog_logging=1;
506	daemon=1;
507	break;
508
509	case 's':
510	syslog_logging=1;
511	break;
512
513	case 'h':
514	usage(argv[0]);
515	break;
516
517	case 'V':
518	errf("%s version %s",argv[0], VERSION);
519	break;
520
521	default:
522	usage(argv[0]);
523	exit(1);
524	}
525	}
526
527	if(argc!=optind+2){
528	usage(argv[0]);
529	exit(1);
530	}
531	ihost_state.fm_host=argv[optind];
532	ihost_state.fm_port=atoi(argv[optind+1]);
533	if(ihost_state.fm_port==0){
534	errf("Invalid port number");
535	usage(argv[0]);
536	}
537
538	if(daemon==1){
539	pid=fork();
540	if(pid==-1){
541	errf("Fork failed, can't background. Exiting");
542	exit(1);
543	}else if(pid!=0){
544	/* Parent process */
545	return 0;
546	}
547	/* We should now be in the background*/
548	if(setsid()==-1){
549	errf("setsid failed (%m)");
550	exit(1);
551	}
552	fclose(stdin);
553	fclose(stdout);
554	fclose(stderr);
555	}
556
557	if(syslog_logging==1){
558	openlog(errf_get_progname(),0,LOG_ERR);
559	setlogmask(LOG_UPTO(LOG_DEBUG));
560	}
561
562	switch(verbose){
563	case 0:
564	/* Critical errors + */
565	log_level=LOG_ERR;
566	break;
567	case 1:
568	/* Recoverable errors */
569	log_level=LOG_WARNING;
570	break;
571	case 2:
572	/* Print stuff like the XML packets */
573	log_level=LOG_INFO;
574	break;
575	default:
576	/* Must have lots of v's */
577	/* Print out everything its doing */
578	log_level=LOG_DEBUG;
579	break;
580	}
581
582	logmessage(LOG_DEBUG,"Writing PID FILE");
583	pid=getpid();
584	if((f=fopen(PID_FILE,"w")) == NULL){
585	logmessage(LOG_WARNING, "Failed to write PID file (%m)");
586	}else{
587	if((fprintf(f,"%d",(int)pid)) <= 0 ){
588	logmessage(LOG_WARNING, "Failed to write PID file (%m)");
589	}
590	if((fclose(f))!=0){
591	logmessage(LOG_ERR, "failed to close PID file");
592	exit(1);
593	}
594	}
595
596	if(ihost_configure(&ihost_state)!=0){
597	logmessage(LOG_ERR,"configure failed");
598	/* Ok, ideally we prob should have 2 copies of the structure and carry on if this
599	happens.. But we dont :) (at the moment) */
600	exit(1);
601	}
602
603	for(;;){
604	cur_time=time(NULL);
605	if(cur_time>=tcp_time){
606	logmessage(LOG_DEBUG,"Sending heartbeat");
607	heartbeat_exit=heartbeat(&ihost_state);
608	if(heartbeat_exit==RECONFIGURE_RETURN_CODE){
609	logmessage(LOG_INFO,"heartbeat needs to be reconfigured");
610	ihost_configure(&ihost_state);
611	udp_time=0;
612	}
613	if(heartbeat_exit==-1){
614	logmessage(LOG_ERR,"Heartbeat failed");
615	exit(1);
616	}
617	tcp_time=time(NULL)+ihost_state.tcp_update_time;
618	logmessage(LOG_DEBUG,"next tcp time should be %d", tcp_time);
619	}
620
621	if(cur_time>=udp_time){
622	logmessage(LOG_DEBUG,"Sending udp data");
623	/* Work out how long it takes to get the stats for next time round
624	so the sleep time can be adjusted accordingly */
625	stat_grab_time=time(NULL);
626	if((xml_stats=stat_grab(&ihost_state, counter++)) == NULL){
627	logmessage(LOG_ERR,"Failed to get stats (%m)");
628	exit(1);
629	}
630	stat_grab_time=time(NULL)-stat_grab_time;
631	send_stats(&ihost_state, xml_stats);
632	free(xml_stats);
633	udp_time=time(NULL)+ihost_state.udp_update_time-stat_grab_time;
634	logmessage(LOG_DEBUG,"next udp time should be %d", udp_time);
635	}
636
637	if(tcp_time<udp_time){
638	sleep_delay=tcp_time-time(NULL);
639	}else{
640	sleep_delay=udp_time-time(NULL);
641	}
642	logmessage(LOG_DEBUG,"Sleeping for %d", sleep_delay);
643	if(sleep_delay>0) sleep(sleep_delay);
644	}
645	return 0;
646	}
647