PLEASE HELP ME IN UNDERSTANDING THE CODE BASICALLY WHAT IS HAPPENING IN THE CODE ABOUT VARIABLES LIBRARIES DEFINE FUNCTIONS AND EVERYTHING IN THE CODE STEP BY STEP

#include #include #include #include #include #include #include #include #include #define MAX 80 #define PORT 5500 #define SA struct sockaddr

void func(int connfd) { char buff[MAX]; int n; for (;;) { bzero(buff, MAX); read(connfd, buff, sizeof(buff)); printf("From client: %s\t To client : ", buff); bzero(buff, MAX); n = 0; while ((buff[n++] = getchar()) != ' ') ; write(connfd, buff, sizeof(buff)); if (strncmp("exit", buff, 4) == 0) { printf("Server Exit... "); break; } } } int main() { int sockfd, connfd, len; struct sockaddr_in servaddr, cli; // socket create and verification sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd == -1) { printf("socket creation failed... "); exit(0); } else printf("Socket successfully created.. "); bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(PORT); if ((bind(sockfd, (SA*)&servaddr, sizeof(servaddr))) != 0) { printf("socket bind failed... "); exit(0); } else printf("Socket successfully binded.. "); if ((listen(sockfd, 5)) != 0) { printf("Listen failed... "); exit(0); } else printf("Server listening.. "); len = sizeof(cli); connfd = accept(sockfd, (SA*)&cli, &len); if (connfd < 0) { printf("server accept failed... "); exit(0); } else printf("server accept the client... "); func(connfd); close(sockfd); }