Skip to content
Snippets Groups Projects
Commit 53a222bf authored by Saleh Ahmed Khan's avatar Saleh Ahmed Khan
Browse files

Workig test client/server (debugged previous using sample code)

parent 55dee9f4
Branches
No related tags found
No related merge requests found
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
/*
* Client program based on sample code
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
void main(int argc, char *argv[]) {
int sockfd = 0 /*listenfd*/, connfd = 0, n = 0;
char recvBuff[1025];
int main(int argc, char* argv[])
{
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
sockfd = socket(AF_INET, SOCK_STREAM, 0); //create socket
char buffer[256];
if (argc < 3)
{
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}
portno = atoi(argv[2]);
/* Translate host name into peer's IP address ;
* This is name translation service by the operating system
*/
server = gethostbyname(argv[1]);
memset(&serv_addr, '0', sizeof(serv_addr)); //initialise server address
memset(recvBuff, '0', sizeof(recvBuff)); //initialise RECEIVE buffer
bcopy((char *)server->h_addr,(char *)&serv_addr.sin_addr.s_addr,server->h_length);
serv_addr.sin_family = AF_INET; //Type of address – internet IP
serv_addr.sin_port = htons(atoi(argv[2])); // port no
if (server == NULL)
{
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
/* Building data structures for socket */
bzero((char *) &serv_addr, sizeof(serv_addr));
if (connect(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
printf("Error connecting to server\n");
} else {
printf("%s server\n", (char*)&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(portno);
/* Create TCP socket -- active open
* Preliminary steps: Setup: creation of active open socket
*/
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
perror("ERROR opening socket");
exit(0);
}
if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
{
perror("ERROR connecting");
exit(0);
}
/* Do processing
*/
printf("Please enter the message: ");
bzero(buffer,256);
while ((n = read(connfd, recvBuff, sizeof(recvBuff)-1)) > 0) {
printf("%s\n\n", recvBuff);
fgets(buffer,255,stdin);
n = write(sockfd,buffer,strlen(buffer));
if (n < 0)
{
perror("ERROR writing to socket");
exit(0);
}
bzero(buffer,256);
n = read(sockfd,buffer,255);
if (n < 0)
{
perror("ERROR reading from socket");
exit(0);
}
printf("%s\n",buffer);
return 0;
}
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
/*
* Server program based on sample code
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
void main(int argc, char *argv[]) {
int listenfd = 0, connfd = 0;
char sendBuff[1025];
struct sockaddr_in serv_addr;
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
socklen_t clilen;
int n;
listenfd = socket(AF_INET, SOCK_STREAM, 0); //create socket
if (listenfd < 0) {
printf("Error creating socket\n");
if (argc < 2)
{
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
}
memset(&serv_addr, '0', sizeof(serv_addr)); //initialise server address
memset(sendBuff, '0', sizeof(sendBuff)); //initialise send buffer
serv_addr.sin_family = AF_INET; //Type of address – internet IP
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); //Listen on ANY IP Addr
// serv_addr.sin_port = htons(5000); //Listen on port 5000
serv_addr.sin_port = htons(atoi(argv[1]));
if (bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
printf("Error binding\n");
/* Create TCP socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
perror("ERROR opening socket");
exit(1);
}
listen(listenfd, 10); // maximum number of client connections to queue
connfd = accept(listenfd, (struct sockaddr*)NULL, NULL);
if (connfd < 0) {
printf("Error accepting\n");
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
/* Create address we're going to listen on (given port number)
- converted to network byte order & any IP address for
this machine */
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno); // store in machine-neutral format
/* Bind address to the socket */
if (bind(sockfd, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0)
{
perror("ERROR on binding");
exit(1);
}
snprintf(sendBuff, sizeof(sendBuff), "Hello World!");
write(connfd, sendBuff, strlen(sendBuff));
close(connfd);
/* Listen on socket - means we're ready to accept connections -
incoming connection requests will be queued */
listen(sockfd,5);
clilen = sizeof(cli_addr);
/* Accept a connection - block until a connection is ready to
be accepted. Get back a new file descriptor to communicate on. */
newsockfd = accept( sockfd, (struct sockaddr *) &cli_addr,
&clilen);
if (newsockfd < 0)
{
perror("ERROR on accept");
exit(1);
}
bzero(buffer,256);
/* Read characters from the connection,
then process */
n = read(newsockfd,buffer,255);
if (n < 0)
{
perror("ERROR reading from socket");
exit(1);
}
printf("Here is the message: %s\n",buffer);
n = write(newsockfd,"I got your message",18);
if (n < 0)
{
perror("ERROR writing to socket");
exit(1);
}
/* close socket */
close(sockfd);
return 0;
}
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment