Programming

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <netinet/in.h>
#include <sys/wait.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#define MAX 100
#define IPSIZE 20

void *get_in_addr(struct sockaddr *sa)
{
    if (sa->sa_family == AF_INET) {
    return &(((struct sockaddr_in *) sa)->sin_addr);
    }
    return &(((struct sockaddr_in6 *) sa)->sin6_addr);
}

char buff[100];
char buf[100];
char *cont;

int main()
{
    int sockfd, new_fd, numbytes;
    struct addrinfo hints, *servinfo, *p;
    struct sockaddr_storage their_addr;
    int yes = 1, len = 16, i = 0;
    char names[20];
    char line[75];
    char opr[2];
    char s[INET6_ADDRSTRLEN];
    char **lines_array;
    int rv, line_counter = 0;;
    FILE *fp;
    struct sockaddr *name;
    socklen_t size;
    memset(&hints, 0, sizeof hints);
    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;

    fp = fopen("ipadd.ini", "r");
    while (fgets(line, sizeof(line), fp) != NULL) {
    line_counter++;
    }
    lines_array = (char **) malloc((line_counter) * IPSIZE);
    if (fp == NULL) {
    printf("cannot open file");
    return 1;
    } else {
    rewind(fp);
    while (fgets(line, sizeof(line), fp) != NULL) {
        lines_array[i++] = strdup(line);
    }
    }
    printf("Line counter %d", line_counter);
    /* for (i = 0; i <line_counter; i++) 
       {
       printf("\n%s", lines_array[i]);
       }

       free(lines_array); */
    int su = 0;

    while (su == 0) {
    i = 0;

    while (i < line_counter) {
        if ((rv =
         getaddrinfo(lines_array[i], "3456", &hints,
                 &servinfo)) == -1) {
        fprintf(stderr, "getaddrinfo:%s", gai_strerror(rv));
        continue;
        }

        for (p = servinfo; p != NULL; p = p->ai_next) {

        if ((sockfd =
             socket(p->ai_family, p->ai_socktype,
                p->ai_protocol)) == -1) {
            perror("\n client:socket");
            continue;
        }
        printf(" socket %d\n", sockfd);

        if (connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
            close(sockfd);
            perror("\nclient:connect");
            continue;
        }

        break;
        }


        if (p == NULL) {
        fprintf(stderr, "client:failed");
        continue;
        }

        strcpy(names, lines_array[i++]);

        inet_ntop(p->ai_family,
              get_in_addr((struct sockaddr *) p->ai_addr), s,
              sizeof s);
        int count = 2;
        if (recv(sockfd, buf, sizeof buf, 0) == -1)
        perror("ee");
        len = 0;

        printf("message from server:%s", buf);

        if ((send(sockfd, names, sizeof names, 0)) == -1)
        perror("err");


        if ((recv(sockfd, buf, sizeof buf, 0)) == -1)
        perror("p");
        printf("\n The no of lines in file is %s", buf); 
        len = count = atoi(buf);
        printf("\ncount %d", count);//till this it works good
//-----------------------------------------------------------------------------
        while (count != 0) {
        
        if ((recv(sockfd, buff, sizeof buff, 0)) == -1)
            perror("k");
        printf("\n%s", buff);// Here is the problem:prints blank
        count--;       //The server sends the information         
                               //successfully but the client receives it  
                               //correctly sometimes,but not always. 
        }

//-------------------------------------------------------------------------------------------        
        if (len > 0)
        return 2;
    }
    i = 0;


    }

    return 0;
}