Comment the below code please.

Server:

int main(int argc, char *argv[]){

int sockfd, newsockfd, portnum, clilen; char buffer[256], hostname[256]; pid_t p_id; struct sockaddr_in serv_addr, cli_addr; int n, pid;

if(argc < 2){ fprintf(stderr, "ERROR, NO PORT PROVIDED! "); exit(1); } sockfd = socket(AF_INET, SOCK_STREAM, 0);//socket is made

if(sockfd < 0){ fprintf(stderr,"ERROR opening socket!!"); exit(1); } bzero((char *) &serv_addr, sizeof(serv_addr)); portnum = atoi(argv[1]);//port num

serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); serv_addr.sin_port = htons(portnum);

if(bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0){ fprintf(stderr,"ERROR on binding"); exit(1); }

if( listen(sockfd, 5) < 0){ printf("ERROR ON LISTEN"); exit(1); }

// accept clilen = sizeof(cli_addr); do{

newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen); if(newsockfd<0){ fprintf(stderr,"ERROR on accept "); exit(1); }

pid=fork(); if(pid==0){ bzero(buffer, 256); n= read(newsockfd, buffer, 255);

if(n<0){//message from client fprintf(stderr,"ERROR Reading from socket "); exit(1); }

strcpy(hostname, buffer); printf("Here is the hostname : %s ", hostname);

//variables used for acsessing webserver? int sockwb, wbport, x; struct sockaddr_in webser_addr; struct hostent *wbhost; char webbuf[510];//sending to webserver

wbport =80;//port used to access web server

sockwb = socket(AF_INET, SOCK_STREAM, 0); if(sockwb <0){ printf("error opeing websocket "); exit(1); } wbhost= gethostbyname(hostname); printf("%s", wbhost->h_name); if(sockwb == -1){ printf("NO SUCH web HOST "); exit(1); } bzero((char*) &webser_addr, sizeof(webser_addr)); webser_addr.sin_family = AF_INET;

bcopy((char *)wbhost->h_addr, (char *)&webser_addr.sin_addr.s_addr, wbhost->h_length);

webser_addr.sin_port = htons(wbport); if(connect(sockwb,(struct sockaddr *)&webser_addr,sizeof(webser_addr)) < 0){ printf("error on web connecting "); exit(1); } bzero(webbuf,510); strcpy(webbuf, "GET http://"); strcat(webbuf, hostname); strcat(webbuf, " HTTP/1.1");

printf("%s ", webbuf); x=write(sockwb,webbuf,strlen(webbuf)); if(x<0){ printf("error writing to web sock"); exit(1); } bzero(webbuf,510); x=read(sockwb,webbuf,510); if(n<0){ printf("error reading from web socket"); exit(1); }

n = write(newsockfd, webbuf,255 );//write back to client

if (n<0){ fprintf(stderr,"ERROR WRITING to socket"); exit(1); }

printf("%s ", webbuf); }//end of if pid==0

printf("closing client"); close(newsockfd);//closing client socket

}while(1); return 0; }

Client:

int main(int argc, char *argv[]){

int sockfd, portnum, n; struct sockaddr_in serv_addr; struct hostent *server;

char buffer[256]; if(argc < 3){ fprintf(stderr, "usage %s hostname port ", argv[0]); exit(1); } portnum = atoi(argv[2]); sockfd= socket(AF_INET, SOCK_STREAM, 0);

if(sockfd <0){ perror("ERROR opening Socket"); exit(1); } server= gethostbyname(argv[1]); if(sockfd == NULL){ fprintf(stderr,"ERROR, no such host "); exit(1); } bzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length); serv_addr.sin_port = htons(portnum);

if(connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) <0){ fprintf(stderr,"ERROR, on connecting"); exit(1); } printf("Please enter the Host name: "); bzero(buffer,256); fgets(buffer,255,stdin); n=write(sockfd,buffer,strlen(buffer)); if(n<0){ printf("Error writing to socket"); exit(1); }

bzero(buffer,256); n=read(sockfd,buffer,255); if(n<0){ printf("ERROR reading from socket"); exit(1); } printf("%s ", buffer);

return 0; }