How can i add Scanner Port - c

Question

i have code create with c and socket of display to adress conecting in my server , now i need to do some code for scanner port in one of there adresses, the input is start port and end port and the server scan ports who connecting in one of adress local
Please i neeeeeeeeeeeed Help
someone who help me
#include <netdb.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#define MAX 80
#define PORT 8080
#define SA struct sockaddr
// Driver function
int main()
{
int sockfd, connfd, len ,start , end;
struct sockaddr_in servaddr, cli;
struct sockaddr_in addr_remote;
char ips[2][20];
char hostname[30];
// socket create and verification
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd == -1) {
printf("socket creation failed...\n");
exit(0);
}
else
printf("Socket successfully created..\n");
bzero(&servaddr, sizeof(servaddr));
// assign IP, PORT
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(PORT);
// Binding newly created socket to given IP and verification
if ((bind(sockfd, (SA*)&servaddr, sizeof(servaddr))) != 0) {
printf("socket bind failed...\n");
exit(0);
}
else
printf("Socket successfully binded..\n");
// Now server is ready to listen and verification
if ((listen(sockfd, 5)) != 0) {
printf("Listen failed...\n");
exit(0);
}
else
printf("Server listening..\n");
len = sizeof(cli);
// Accept the data packet from client and verification
for(int i=0;i<2;i++){
connfd = accept(sockfd, (SA*)&addr_remote, &len);
if (connfd < 0) {
printf("server acccept failed...\n");
exit(0);
}
else
printf("server acccept the client...\n");
strcpy(ips[i], inet_ntoa(addr_remote.sin_addr));
}
// Display Ip
for(int i=0;i<2;i++){
printf("%s \n",ips[i]);}
// Scan PORT
//Get the hostname to scan
printf("Enter hostname or IP : ");
gets(hostname);
//Get start port number
printf("Enter start port number : ");
//To Handle the Input
int data;
data = scanf("%d",&start);
//Get end port number
printf("Enter end port number : ");
int data2 = scanf("%d" , &end);
// After Display close the socket
close(sockfd);
}