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client1-other.c
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client1-other.c
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//
// client1.c
//
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>
#define NUM_THREADS 5
#define MAXPENDING 5
#define RCVBUFSIZE 32
int qsent=0;
int no_of_replies0=0;
int no_of_replies1=0;
int no_of_replies2=0;
int no_of_replies3=0;
int timestamp=0;
char my_ip[50];
char str[80];
int clients[4];
unsigned short serv1Port, serv2Port, serv3Port; /* Echo server port */
char *serv1IP, *serv2IP, *serv3IP,uid[50];
int eq_check=0;
int peer_num=0;
char PQ[500][7][100];
char PQ_rcv[7][100];
int pq_read_point=0;
int pq_write_point=0;
int pqts=0,pqip=1,pqport=2,pqfname=3,pqmsgtype=4,pqreqtype=5,pqservname=6;
int pq_mutex=0;
int sock1 ,sock2 ,sock3,sock[3];
char ips_in_front[10][50];
char ports_in_front[10][50];
int sock_saver[40];
int sock_saver_index=0;
int total_reqs=0;
//int fc=0;
int my_pos=0;
int client_count=0;
void *ThreadMain(void *arg); /* Main program of a thread */
/* Structure of arguments to pass to client thread */
struct ThreadArgs
{
int clntSock; /* Socket descriptor for client */
};
void ErrorHandler(char *errorMessage); /* Error handling function */
void Client_Request_Receiver(int clntSocket); /* TCP client handling function */
int CreateTCPServerSocket(unsigned short port); /* Create TCP server socket */
int AcceptTCPConnection(int servSock); /* Accept TCP connection request */
void *TCPserver(void *threadid)
{
long tid;
tid = (long)threadid;
printf("Starting Server..\n");
int servSock; /* Socket descriptor for server */
int clntSock; /* Socket descriptor for client */
unsigned short echoServPort; /* Server port */
pthread_t threadID; /* Thread ID from pthread_create() */
struct ThreadArgs *threadArgs; /* Pointer to argument structure for thread */
echoServPort = atoi(str); /* First arg: local port */
servSock = CreateTCPServerSocket(echoServPort);
for (;;) /* run forever */
{
clntSock = AcceptTCPConnection(servSock);
sock_saver[sock_saver_index++]=clntSock;
/* Create separate memory for client argument */
if ((threadArgs = (struct ThreadArgs *) malloc(sizeof(struct ThreadArgs))) == NULL)
ErrorHandler("malloc() failed");
threadArgs -> clntSock = clntSock;
/* Create client thread */
if (pthread_create(&threadID, NULL, ThreadMain, (void *) threadArgs) != 0)
ErrorHandler("pthread_create() failed");
// printf("with thread %ld\n", (long int) threadID);
}
/* NOT REACHED */
pthread_exit(NULL);
}
void *Client_Controller(void *threadid)
{
long tid;
tid = (long)threadid;
int bytes_recieved=0;/* Socket descriptor */
int servnum=0, filenum=0;
char recv_data[1024];
struct sockaddr_in ServAddr1, ServAddr2, ServAddr3; /* Echo server address */
char request[100]; /* String to send to echo server */
char findex[20][50];
int fileindex=0;
unsigned int StringLen; /* Length of string to echo */
int bytesRcvd, totalBytesRcvd;
if ((sock1 = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
ErrorHandler("socket() failed");
if ((sock2 = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
ErrorHandler("socket() failed");
if ((sock3 = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
ErrorHandler("socket() failed");
memset(&ServAddr1, 0, sizeof(ServAddr1));
ServAddr1.sin_family = AF_INET;
ServAddr1.sin_addr.s_addr = inet_addr(serv1IP); /* Server IP address */
ServAddr1.sin_port = htons(serv1Port); /* Server port */
memset(&ServAddr2, 0, sizeof(ServAddr2));
ServAddr2.sin_family = AF_INET;
ServAddr2.sin_addr.s_addr = inet_addr(serv2IP); /* Server IP address */
ServAddr2.sin_port = htons(serv2Port); /* Server port */
memset(&ServAddr3, 0, sizeof(ServAddr3));
ServAddr3.sin_family = AF_INET;
ServAddr3.sin_addr.s_addr = inet_addr(serv3IP); /* Server IP address */
ServAddr3.sin_port = htons(serv3Port); /* Server port */
/* Establish the connection to the echo server */
if (connect(sock1, (struct sockaddr *) &ServAddr1, sizeof(ServAddr1)) < 0)
ErrorHandler("connect() failed");
if (connect(sock2, (struct sockaddr *) &ServAddr2, sizeof(ServAddr2)) < 0)
ErrorHandler("connect() failed");
if (connect(sock3, (struct sockaddr *) &ServAddr3, sizeof(ServAddr3)) < 0)
ErrorHandler("connect() failed");
sock[1]=sock1;
sock[2]=sock2;
sock[3]=sock3;
char req;
while(1)
{
strcpy(request,"");
while(sock_saver_index<4); // waits for other clients to join..slick!
printf("No. of peer clients : %d\n",sock_saver_index);
total_reqs++;
printf("\nAction to perform : \n1.READ\n2.WRITE\n3.ENQUIRE\n4.EXIT\nACTION>>");
// scanf(" %s",request);
sleep(2);
if(total_reqs<20)
{
if((total_reqs%2)==0)
strcpy(request,"1");
else if((total_reqs%2)==1)
strcpy(request,"2");
}
else
{
strcpy(request,"4");
printf("Press ENTER to exit once all computations are complete.\n");
getchar();getchar();
}
if(request[0]!='4' && request[0]!='3' && eq_check==0)
{
printf("Error:File list not available.\nSending enquire request to obtain file list.\n");
strcpy(request,"3");
}
StringLen = sizeof(request); /* Determine input length */
if(request[0]=='1' || request[0]=='3' )
{
printf("\nServer to send the request to?(1/2/3) : ");
//scanf(" %d",&servnum);
if((total_reqs%3)==0)
servnum=1;
else if((total_reqs%3)==1)
servnum=2;
else if((total_reqs%3)==2)
servnum=3;
}
if(request[0]=='1' || request[0]=='2')
{
while(pq_mutex==1);
pq_mutex=1;
sprintf(PQ[pq_write_point][pqts],"%d",timestamp);
strcpy(PQ[pq_write_point][pqreqtype],request);
strcpy(PQ[pq_write_point][pqip],my_ip);
strcpy(PQ[pq_write_point][pqport],str);
strcpy(PQ[pq_write_point][pqmsgtype],"req");
if(request[0]=='2')
strcpy(PQ[pq_write_point][pqservname],"all");
else
sprintf(PQ[pq_write_point][pqservname],"%d",servnum);
/////
req=request[0];
if(eq_check!=0)
{
int i;
for(i=0;i<9;i++)
{
printf("%d : %s\n",i,findex[i]);
}
printf("File name on which the R/W has to be performed on : ");
strcpy(request,"");
//scanf(" %d",&filenum);
//if(fc>8)fc=0;
filenum=rand()%4;
strcpy(request,findex[filenum]);
strcpy(PQ[pq_write_point][pqfname],findex[filenum]);
int j;
for(j=0;j<7;j++)
{
printf("PQ @ write pt : %s\n",PQ[pq_write_point][j]);
}
/*
no_of_replies0=0;
no_of_replies1=0;
no_of_replies2=0;
no_of_replies3=0;
*/
for(i=0;i<sock_saver_index;i++)
{
timestamp++;
if (send(sock_saver[i], PQ[pq_write_point], sizeof(PQ[pq_write_point]), 0) != sizeof(PQ[pq_write_point]))
ErrorHandler("send()1 failed");
}
pq_write_point++;
StringLen = sizeof(request);
}
/////
pq_mutex=0;
}
printf("Sending String : %s\n",request);
//request_sender
if(request[0]=='4' )
{
printf("Sending EXIT messge to Servers\n");
timestamp++;
if (send(sock[1], request, StringLen, 0) != StringLen)
ErrorHandler("send2() sent a different number of bytes than expected");
timestamp++;
if (send(sock[2], request, StringLen, 0) != StringLen)
ErrorHandler("send3() sent a different number of bytes than expected");
timestamp++;
if (send(sock[3], request, StringLen, 0) != StringLen)
ErrorHandler("send1() sent a different number of bytes than expected");
}
else if(request[0]=='3' )
{
timestamp++;
if (send(sock[servnum], request, StringLen, 0) != StringLen)
ErrorHandler("send() sent a different number of bytes than expected");
}
if(request[0]=='3')
{
eq_check=1;
printf("Received: \n"); /* Setup to print the echoed string */
timestamp++;
if ((bytesRcvd = recv(sock[servnum], findex, sizeof(findex), 0)) <= 0)
ErrorHandler("recv()2 failed or connection closed prematurely");
totalBytesRcvd += bytesRcvd; /* Keep tally of total bytes */
int k=0;
for(k=0;k<9;k++)
printf ("%s\n", findex[k]);
}
if(request[0]=='4')
{
close(sock1);
close(sock2);
close(sock3);
printf("Sending EXIT messge to Peers\n");
int i;
for(i=0;i<sock_saver_index;i++)
{
timestamp++;
char end_send[7][100];
strcpy(end_send[6],request);
if (send(sock_saver[i], end_send, sizeof(end_send), 0) != sizeof(end_send))
ErrorHandler("send() sent a different number of bytes than expected");
//close(sock_saver[i]);
}
printf("\nTerminating Execution\n"); /* Print a final linefeed */
exit(0);
}
}//end of while
pthread_exit(NULL);
}
//the clienttcp
void *Peer_Handler(void *threadid)
{
long tid;
tid = (long)threadid;
int sock; /* Socket descriptor */
struct sockaddr_in echoServAddr; /* Echo server address */
unsigned short echoServPort; /* Echo server port */
char *servIP; /* Server IP address (dotted quad) */
char *echoString; /* String to send to echo server */
char echoBuffer[RCVBUFSIZE]; /* Buffer for echo string */
unsigned int echoStringLen; /* Length of string to echo */
int bytesRcvd, totalBytesRcvd; /* Bytes read in single recv() */
int clntSocket;
if(peer_num<my_pos){
servIP = ips_in_front[peer_num]; /* First arg: server IP address (dotted quad) */
echoServPort = atoi(ports_in_front[peer_num++]); /* Use given port, if any */
}
/* Create a reliable, stream socket using TCP */
if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
ErrorHandler("socket() failed");
/* Construct the server address structure */
memset(&echoServAddr, 0, sizeof(echoServAddr)); /* Zero out structure */
echoServAddr.sin_family = AF_INET; /* Internet address family */
echoServAddr.sin_addr.s_addr = inet_addr(servIP); /* Server IP address */
echoServAddr.sin_port = htons(echoServPort); /* Server port */
/* Establish the connection to the echo server */
if (connect(sock, (struct sockaddr *) &echoServAddr, sizeof(echoServAddr)) < 0)
ErrorHandler("connect() failed");
sock_saver[sock_saver_index++]=sock;
echoString = "hello";
echoStringLen = sizeof(echoString); /* Determine input length */
/* Send the string to the server */
// if (send(sock, echoString, echoStringLen, 0) != echoStringLen)
// ErrorHandler("send() sent a different number of bytes than expected");
/* Receive the same string back from the server */
totalBytesRcvd = 0;
printf("Received: "); /* Setup to print the echoed string */
while (1)
{
/* Receive up to the buffer size (minus 1 to leave space for
a null terminator) bytes from the sender */
int i;
for(i=0;i<6;i++)
strcpy(PQ_rcv[i],"");
int recvMsgSize;
if ((recvMsgSize = recv(sock, PQ_rcv, sizeof(PQ_rcv), 0)) < 0) //tupdate
ErrorHandler("recv()3 failed");
if(strncmp(PQ_rcv[6],"4",1)==0)
{
printf("Closing Sockets and terminating Execution\n");
close(sock1);
close(sock2);
close(sock3);
int i;
for(i=0;i<sock_saver_index;i++)
{
close(sock_saver[i]);
}
exit(0);
}
if(timestamp>atoi(PQ_rcv[pqts]))
{
timestamp++;
}
else
{
timestamp=atoi(PQ_rcv[pqts]);
timestamp++;
}
for(i=0;i<7;i++)
printf("Received message : %s\n",PQ_rcv[i]);
if(PQ_rcv[pqmsgtype][2]=='q')
{
printf("PH:ITS A REQ MSG!\n");
while(pq_mutex==1);
pq_mutex=1;
printf("PH-q:Mutex obtained\n");
int i;int index;
if(atoi(PQ_rcv[pqts])>timestamp)
{
if(sock==sock_saver[0])
no_of_replies0++;
else if(sock==sock_saver[1])
no_of_replies1++;
else if(sock==sock_saver[2])
no_of_replies2++;
else if(sock==sock_saver[3])
no_of_replies3++;
}
for(i=pq_read_point;i<=pq_write_point;i++)
{
index=i;
if(atoi(PQ_rcv[pqts])<atoi(PQ[i][pqts]))
{
index=i;break;
}
}
printf("Insert point : %d",index);
char temp[7][100];
char temp_send[7][100];
for(i=0;i<7;i++)
{
strcpy(temp_send[i],PQ_rcv[i]);
}
int j;
for(i=index;i<=pq_write_point;i++)
{
for(j=0;j<7;j++)
{
strcpy(temp[j],PQ[i][j]);
}
for(j=0;j<7;j++)
{
strcpy(PQ[i][j],PQ_rcv[j]);
}
for(j=0;j<7;j++)
{
strcpy(PQ_rcv[j],temp[j]);
}
}
for(j=0;j<7;j++)
{
printf("Inserted : %s\n",PQ[index][j]);
}
pq_write_point++;
strcpy(temp_send[pqmsgtype],"rep");
int recvMsgSize=sizeof(temp_send);
timestamp++;
if (send(sock, temp_send, recvMsgSize, 0) != recvMsgSize)
ErrorHandler("send()2 failed");
pq_mutex=0;
printf("PH-q:Mutex released\n");
}
else if(PQ_rcv[pqmsgtype][2]=='p')
{
printf("PH:ITS A REP MSG!\n");
if(atoi(PQ_rcv[pqts])>timestamp)
{
if(sock==sock_saver[0])
no_of_replies0++;
else if(sock==sock_saver[1])
no_of_replies1++;
else if(sock==sock_saver[2])
no_of_replies2++;
else if(sock==sock_saver[3])
no_of_replies3++;
}
}
else if(PQ_rcv[pqmsgtype][2]=='l')
{
printf("PH:ITS A REL MSG!\n");
while(pq_mutex==1);
pq_mutex=1;
printf("PH-l:Mutex obtained\n");
int i;int index;
if(atoi(PQ_rcv[pqts])>timestamp)
{
if(sock==sock_saver[0])
no_of_replies0++;
else if(sock==sock_saver[1])
no_of_replies1++;
else if(sock==sock_saver[2])
no_of_replies2++;
else if(sock==sock_saver[3])
no_of_replies3++;
}
for(i=pq_read_point;i<pq_write_point;i++)
{
int len=strlen(PQ_rcv[pqip]);
if(strncmp(PQ_rcv[pqip],PQ[i][pqip],len)==0)
{
printf("PH:same ip\n");
if(strncmp(PQ_rcv[pqport],PQ[i][pqport],4)==0)
{
printf("PH:same port\n");
int flen=strlen(PQ_rcv[pqfname]);
printf("File names::%c | %s\n",PQ_rcv[pqfname][4],PQ[i][pqfname]);
if(PQ_rcv[pqfname][4]==PQ[i][pqfname][4])
{
printf("PH:Got the file to rel\n");
index=i;break;
}
}
}
}
for(i=index;i<=pq_write_point;i++)
{
int j;
for(j=0;j<7;j++)
{
strcpy(PQ[i][j],PQ[i+1][j]);
}
}
pq_write_point--;
printf("pqwp: %d\n",pq_write_point);
pq_mutex=0;
printf("PH-l:Mutex released\n");
}
}
printf("\n"); /* Print a final linefeed */
close(sock);
exit(0);
pthread_exit(NULL);
}
void *Query_Sender(void *threadid)
{
while(1)
{
char fname[50];qsent=0;
while(no_of_replies0<0 && no_of_replies0<1 && no_of_replies0<2 && no_of_replies3<1); //rosh
no_of_replies0=0;
no_of_replies1=0;
no_of_replies2=0;
no_of_replies3=0;
qsent=1;
while(pq_write_point<1);
while(pq_mutex==1);
//printf(".");
pq_mutex=1;int flag=1;
char request[7][100];
char trequest[7][100];
strcpy(fname,"");
int i;int index;
for(i=pq_read_point;i<pq_write_point;i++)
{
int len=strlen(my_ip);
if(strncmp(my_ip,PQ[i][pqip],len)==0)
{
if(strncmp(str,PQ[i][pqport],4)==0)
{
index=i;
strcpy(fname,PQ[i][pqfname]);
int j;flag=0;
for(j=pq_read_point;j<index;j++)
{
if(strcmp(fname,PQ[j][pqfname])==0)
{
flag=1;
break;
}
}
}
}//first if
if(flag==0)
{
printf("Sending request from PQ\n");
int j;
for(j=0;j<7;j++)
{
strcpy(request[j],PQ[index][j]);
strcpy(trequest[j],PQ[index][j]);
}
printf("Printing request content:\n");
for(j=0;j<7;j++)
{
printf("%s\n",request[j]); // data goes missin?
}
char recv_data[200];
char req[100];
if(request[pqreqtype][0]=='2'){
printf("Sending Write request to servers\n");
int StringLen=32;
timestamp++;
if (send(sock[1], request[pqreqtype], StringLen, 0) != StringLen)
ErrorHandler("send2() sent a different number of bytes than expected");
timestamp++;
if (send(sock[2], request[pqreqtype], StringLen, 0) != StringLen)
ErrorHandler("send3() sent a different number of bytes than expected");
timestamp++;
if (send(sock[3], request[pqreqtype], StringLen, 0) != StringLen)
ErrorHandler("send1() sent a different number of bytes than expected");
strcpy(req,fname);
printf("Entering Write mode and sending file name :%s \n",req);
timestamp++;
if (send(sock[3], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
timestamp++;
if (send(sock[1], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
timestamp++;
if (send(sock[2], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
strcpy(req,"< ");
char temp[50];
//sprintf(temp,"%d",PQ[index][timestamp]);
strcpy(temp,PQ[index][pqts]);
int bytes_recieved;
strcpy(recv_data,"");
strcat(req,uid);
strcat(req," : ");
strcat(req,temp);
strcat(req," >");
printf("Request itoa : %s\n",req);
timestamp++;
if (send(sock[1], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
timestamp++;
if (send(sock[2], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
timestamp++;
if (send(sock[3], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
int l=0;
for(l=1;l<4;l++){
strcpy(req,"");
timestamp++;
bytes_recieved=recv(sock[l],req,sizeof(req),0);
req[bytes_recieved] = '\0';
printf("recv_data : %s\n",req);
}
}
else if(request[pqreqtype][0]=='1')
{
printf("Sending Read request to server\n");
int StringLen=32;
timestamp++;
if (send(sock[atoi(PQ[index][pqservname])], request[pqreqtype], StringLen, 0) != StringLen)
ErrorHandler("send() sent a different number of bytes than expected");
strcpy(req,fname);
printf("Entering Read mode : %s\n",req);
timestamp++;
printf("Sending to : %d\n",atoi(PQ[index][pqservname]));
if (send(sock[atoi(PQ[index][pqservname])], req, sizeof(req), 0) != sizeof(req))
ErrorHandler("send() sent a different number of bytes than expected");
strcpy(recv_data,"");
printf("File name SENT:%s\n",req);
timestamp++;
strcpy(req,"");
int bytes_recieved=recv(sock[atoi(PQ[index][pqservname])],req,sizeof(req),0);
recv_data[bytes_recieved] = '\0';
printf("########Value received : %s########\n\n",req);
}
//while(pq_mutex==1);
// pq_mutex=1;
printf("Time to release the request\n");
for(j=0;j<7;j++)
{
printf("Copying:REL: %s\n",request[j]);
// strcpy(request[j],PQ[index][j]);
}
for(j=0;j<7;j++)
{
printf("trequest: %s\n",trequest[j]);
// strcpy(request[j],PQ[index][j]);
}
for(i=index;i<=pq_write_point;i++)
{
int j;
for(j=0;j<7;j++)
{
strcpy(PQ[i][j],PQ[i+1][j]);
}
}
pq_write_point--;
printf("Values in PQ : %d\n",pq_write_point);
printf("Release request loaded\n");
strcpy(request[pqmsgtype],"rel");
int i;
printf("Sending Release msg to all peers : %d\n",sock_saver_index);
for(i=0;i<sock_saver_index;i++)
{
timestamp++;
if (send(sock_saver[i], request, sizeof(request), 0) != sizeof(request))
ErrorHandler("send() sent a different number of bytes than expected");
}
}//if flag==0
}//for
pq_mutex=0;
int tp;
for(tp=0;tp<2000;tp++);
flag=0;
}//while
pthread_exit(NULL);
}//func
int main (int argc, char *argv[])
{
pthread_t threads[NUM_THREADS];
int rc;
long t=0;
if (argc!=8) /* Test for correct number of arguments */
{
fprintf(stderr, "Usage: %s <UID> <Server1 IP> <Server1 Port> <Server2 IP> <Server2 Port> <Server3 IP> <Server3 Port>\n",
argv[0]);
exit(1);
}
strcpy(uid,argv[1]);
serv1IP = argv[2];
serv1Port = atoi(argv[3]);
serv2IP = argv[4];
serv2Port = atoi(argv[5]);
serv3IP = argv[6];
serv3Port = atoi(argv[7]);
///my ip
char Buf [ 200 ] ;
struct hostent * Host = (struct hostent * ) malloc ( sizeof ( struct hostent ));
gethostname ( Buf , 200 ) ;
printf ( "%s\n", Buf ) ;
Host = ( struct hostent * ) gethostbyname ( Buf ) ;
strcpy(my_ip,inet_ntoa(*((struct in_addr *)Host->h_addr)));
printf("My IP Address : %s\n", my_ip);
int iplen=strlen(my_ip);
////my ip
printf("Enter the TCP server port for client : ");
scanf("%s",str);
/////writing to cfg
FILE *fp;
printf("Writing to cfg.txt\n");
fp = fopen("cfg.txt","a"); /* open for writing */
fprintf(fp,"\n%s", my_ip);
fprintf(fp,"\n%s", str);
fclose(fp); /* close the file before ending program */
/////end of writing to cfg
///////getting ip/ports in front and my position
char buff[200];
char buff1[200];
FILE *fopen(), *fpr;
fpr = fopen("cfg.txt","r");
strcpy(buff,"");
int fcount=0;
fgets(buff, 200, fpr);
while(fgets(buff, 200, fpr))
{
strcpy(ips_in_front[fcount],buff);
printf("Reading IP : %s\n",ips_in_front[fcount]);
strcpy(buff,"");
fgets(buff1, 200, fpr);
strcpy(ports_in_front[fcount++],buff1);
printf("Reading Port : %s\n",ports_in_front[fcount-1]);
strcpy(buff1,"");
if(strncmp(ips_in_front[fcount-1],my_ip,iplen)==0 && strncmp(ports_in_front[fcount-1],str,4)==0)
{
printf("MATCH FOUND!\n");
my_pos=fcount-1;break;
}
}
fclose(fpr);
///////end of:getting ip/ports in front and my position
printf("CLIENT : %s\n",uid);
printf("main:Starting a server\n");
if(my_pos!=4)
{
rc = pthread_create(&threads[t], NULL, TCPserver, (void *)t);
if (rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);
}
else printf("Not Starting TCP server since this is the 5th process\n");
t++;
}
printf("my_pos : %d\n",my_pos);
int iter;
for(iter=0;iter<my_pos;iter++)
{
printf("main:Starting a client:\n");
rc = pthread_create(&threads[t], NULL, Peer_Handler, (void *)t);
if (rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);}
t++;
}
printf("main:starting client_controller\n");
rc = pthread_create(&threads[t], NULL, Client_Controller, (void *)t);
if (rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);}
t++;
printf("main:starting Query_Sender\n");
rc = pthread_create(&threads[t], NULL, Query_Sender, (void *)t);
if (rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);}
/* Last thing that main() should do */
pthread_exit(NULL);
}
void *ThreadMain(void *threadArgs)
{
int clntSock; /* Socket descriptor for client connection */
/* Guarantees that thread resources are deallocated upon return */
pthread_detach(pthread_self());
/* Extract socket file descriptor from argument */
clntSock = ((struct ThreadArgs *) threadArgs) -> clntSock;
free(threadArgs); /* Deallocate memory for argument */
Client_Request_Receiver(clntSock);
return (NULL);
}
void ErrorHandler(char *errorMessage)
{
perror(errorMessage);
exit(1);
}
int CreateTCPServerSocket(unsigned short port)
{
int sock; /* socket to create */
struct sockaddr_in echoServAddr; /* Local address */
/* Create socket for incoming connections */
if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
ErrorHandler("socket() failed");
/* Construct local address structure */
memset(&echoServAddr, 0, sizeof(echoServAddr)); /* Zero out structure */
echoServAddr.sin_family = AF_INET; /* Internet address family */
echoServAddr.sin_addr.s_addr = htonl(INADDR_ANY); /* Any incoming interface */
echoServAddr.sin_port = htons(port); /* Local port */
/* Bind to the local address */
if (bind(sock, (struct sockaddr *) &echoServAddr, sizeof(echoServAddr)) < 0)
ErrorHandler("bind() failed");
/* Mark the socket so it will listen for incoming connections */
if (listen(sock, MAXPENDING) < 0)
ErrorHandler("listen() failed");
return sock;
}
int AcceptTCPConnection(int servSock)
{
int clntSock; /* Socket descriptor for client */
struct sockaddr_in echoClntAddr; /* Client address */
unsigned int clntLen; /* Length of client address data structure */
/* Set the size of the in-out parameter */
clntLen = sizeof(echoClntAddr);
/* Wait for a client to connect */