facing problem in binding

[ManiRon]

I am trying to create a sockey program using client server concept but i face problem while binding data in server side . Below is the code

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include"winsock2.h"
#include"winsock.h"

int MainWindow::serTransmit()
{
int server_fd;
struct sockaddr_in address;
char buffer[1024] = {0};
qDebug("PRINT1");
if ((server_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) == 0)
{
perror("socket failed");
exit(EXIT_FAILURE);
}
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;;
address.sin_port = htons( PORT );
qDebug("PRINT2");
if (bind(server_fd, (sockaddr *)&address, sizeof(sockaddr_in)))
{
perror("bind failed");
exit(EXIT_FAILURE);
}
ui->lineEdit->setText(buffer);
printf("%s\n",buffer );
return 0;
}

Kindly suggest if i have done any mistake and solution for this

[jsulm]

@ManiRon Why don't you use http://doc.qt.io/qt-5/qtnetwork-index.html ? Then your question would be related to Qt.
And you don't even mention what problem you face...

[ManiRon]

@jsulm my problem is when i try to bind data it returns an error saying the bind failed: invalid argument

[jsulm]

@ManiRon Are you aware that your question is completely unrelated to Qt?
You're using low level socket API not Qt.
Please post at least the whole compiler error.

[ManiRon]

@jsulm yes sir this is what the error say invalid argument in bind

[jsulm]

@ManiRon Please copy paste the compiler error

[ManiRon]

@jsulm

[jsulm]

@ManiRon So, it's not a compiler error but a runtime error.
You should zero your address first like

bzero((char *) &address, sizeof(address));

As shown here http://www.cs.rpi.edu/~moorthy/Courses/os98/Pgms/socket.html

[ManiRon]

@jsulm said in facing problem in binding:

bzero((char *) &address, sizeof(address));

I used memset(&address, 0, sizeof(sockaddr_in)); this and set it to zero but still the problem exists

[jsulm]

@ManiRon Are you sure you want to use SOCK_DGRAM (UDP) and not SOCK_STREAM (TCP)?
If I remember correctly you don't need bind() for UDP.

[ManiRon]

@jsulm

I have to check

[ManiRon]

@jsulm

actually socket creation itself is a problem
server_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)

here server_fd is -1