error in send data to server - c++

Question

Why when run the program and send data to server return this errorrecv failed: Transport endpoint is not connected or don't show server accepted just show the message of send data function in client
server.cpp:
int main() {
char packet[30];
char buffer[20] = "I got your message";
int conn_sock, comm_sock, n, m;
struct sockaddr_in server_addr, client_addr;
if ((conn_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Couldn't create socket");
exit(1);
}
cout << "Already create socket!!!\n" << endl;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(0);
server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
memset(&server_addr, 0, sizeof(server_addr));
if (bind(conn_sock, (struct sockaddr *) &server_addr, sizeof(server_addr))
== -1) {
perror("couldn't bind");
exit(1);
}
if (listen(conn_sock, 10) == -1) {
perror("couldn't listen");
exit(1);
}
cout << "Listening For Connection...\r" << endl;
socklen_t len = sizeof(server_addr);
if (getsockname(conn_sock, (struct sockaddr *) &server_addr, &len) == -1)
perror("getsockname");
else
printf("port number %d\n", ntohs(server_addr.sin_port));
while (1) {
memset(&client_addr, 0, sizeof(client_addr));
if ((comm_sock = accept(conn_sock, (struct sockaddr *) &client_addr,
(socklen_t *) &client_addr)) == -1) {
perror("couldn't accept\n");
continue;
}
cout << "accepted" << endl;
bzero(packet, 10);
m = recv(conn_sock, packet, 10, 0);
if (m < 0) {
perror("recv failed");
exit(1);
}
cout<<"recieved"<<endl;
/* Write a response to the client */
n = send(conn_sock, buffer, sizeof(buffer), 0);
if (n < 0) {
perror("ERROR send to client");
exit(1);
}
close(n);
close(m);
close(comm_sock);
}
close(conn_sock);
return 0;
}
cilent.cpp:
#define MYPORT 51833
namespace personalization {
bool client::conn() {
//create socket if it is not already created
if (sock == -1) {
//Create socket
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
perror("Could not create socket");
}
cout << "Socket created" << endl;
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(MYPORT);
server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
if (connect(sock , (struct sockaddr *)&server_addr , sizeof(server_addr)) < 0)
{
perror("connect failed. Error");
return false;
}
cout<<"Connected\n";
return true;
close(sock);
}
bool client::send_data() {
//Send some data
if( send(sock , packet , sizeof( packet ) , 0) < 0)
{
perror("Send failed");
return false;
}
cout<<"Data send\n";
return true;
close(sock);
}
bool client::rec_data() {
char buffer[20];
string reply;
//Receive a echo from the server
if (recv(sock, buffer, sizeof(buffer), 0) < 0) {
perror("receive failed");
return false;
}
reply = buffer;
return true;
close(sock);
}
client::client() {
// TODO Auto-generated constructor stub
sock=-1;
}
output is:
server:Already create socket!!!
Listening For Connection...
port number 51833
client: Socket created
Connected
Data send
receive failed: Connection reset by peer
or:
server:Already create socket!!!
Listening For Connection...
port number 51833
client:Socket created
Connected
Data send
srver:accepted
recv failed: Transport endpoint is not connected

Answer 1

In the server's recv and send calls, you need to pass the socket returned from accept.
So instead of
m = recv(conn_sock, packet, 10, 0);
do
m = recv(comm_sock, packet, 10, 0);
Same goes for the send call.
Also, don't call close on n and m, that is to say remove these two lines of code:
close(n);
close(m);
EDIT: Sorry, while I'm at it, this is probably not what you intended in the client's send_data and rec_data:
return true;
close(sock);