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client.c
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client.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#define PORT_EDGE "23023" //aws TCP port
#define HOST "localhost"
char data_sepr[100][100];
// read the file and seperately store the string and number and then return the number of file
int read_file(char* file_name){
char buf[1024];
FILE *fp;
int len;
char dot[] = ",";
int num_of_line;
if((fp = fopen(file_name,"r")) == NULL){
perror("fail to read");
exit (1) ;
}
char *result = NULL;
int ct = 0;
while(fgets(buf,1024,fp) != NULL){
num_of_line ++;
len = strlen(buf);
buf[len-1] = '\0';
result = strtok(buf, dot);
while( result != NULL ) {
strcpy(data_sepr[ct],result);
ct ++;
result = strtok( NULL, dot);
}
}
return num_of_line;
}
int main(int argc, char *argv[])
{
int num_of_line;
int sockfd;
int rv_c;
struct addrinfo hints_c, *servinfo_c, *p_c;
//The following code are from Beej's tutorial
memset(&hints_c, 0, sizeof hints_c);
hints_c.ai_family = AF_UNSPEC;
hints_c.ai_socktype = SOCK_STREAM;
rv_c = getaddrinfo(HOST, PORT_EDGE, &hints_c, &servinfo_c);
if (rv_c != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv_c));
return 1;
}
// loop through all the results and connect to the first we can
for(p_c = servinfo_c; p_c != NULL; p_c = p_c->ai_next) {
sockfd = socket(p_c->ai_family, p_c->ai_socktype,p_c->ai_protocol);
if (sockfd == -1) {
perror("client: socket");
continue;
}
if (connect(sockfd, p_c->ai_addr, p_c->ai_addrlen) == -1) {
perror("client: connect");
close(sockfd);
continue;
}
break;
}
if (p_c == NULL) {
fprintf(stderr, "client: failed to connect\n");
return 2;
}
freeaddrinfo(servinfo_c); // all done with this structure
// end of the referred code from Beej's tutorial
printf("The client is up and running. \n");
num_of_line = read_file(argv[1]);
// send number of lines and seperate data to edge server
send(sockfd, (char *)& num_of_line, sizeof num_of_line, 0);
send(sockfd, (char *)& data_sepr, sizeof data_sepr, 0);
printf("The client has successfully finished sending %d lines to the edge server.\n",num_of_line);
char res_sequence[num_of_line][100];
// receive the calculation result from edge server.
recv(sockfd, (char *)&res_sequence, sizeof res_sequence, 0);
printf("The client has successfully finished receiving all computation results from the edge server.\n");
printf("The final computation results are:\n");
//output the result
int count;
for (count = 0; count < num_of_line; count++){
printf("%s\n",res_sequence[count]);
}
}