bind socket fails with errno 88 [duplicate] - c++

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Bind return error 88
(1 answer)
Closed 5 years ago.
I was searching for an answer for my issue though nothing relevant came up.
I'm writing a very simple code for running a server on a virtual machine (VBOX) running ubuntu 14.04.
I turned off my firewall and my anti-virus program (read that it might be related)
I rechecked (and looked for different ports) that the port is not in use but keep on receiving return value of -1 to the bind() function with errno 88 (socket operation on non-socket).
I'm running the server on port 7777.
Also tried running this code on my host
Can someone suggest what I am doing wrong?
p.s also checked the code with valgrind for memory leaks but it looks fine.
the code is as follows:
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <iostream>
#include <fstream>
#include <strings.h>
#include <stdlib.h>
#include <string>
#include <pthread.h>
#include <errno.h>
using namespace std;
#define NUM_OF_THREADS 3
static int connFd;
void *task1(void *);
/*
*
*/
int main(int argc, char** argv) {
int pid, portNo, listenFd;
socklen_t len; // store the size of the address
bool loop = false;
struct sockaddr_in svrAdd, clntAdd;
pthread_t threadArr[NUM_OF_THREADS];
if (argc < 2){
cerr << "ERROR: ./server <port>" << endl;
return 0;
}
portNo = atoi(argv[1]); // TODO verify the port is between 1024 and 65535
//Create the socket
if (listenFd = socket(AF_INET, SOCK_STREAM, 0) < 0){
cerr << "ERROR: cannot open socket." << endl;
return 0;
}
bzero((char*)&svrAdd, sizeof(svrAdd));
svrAdd.sin_family = AF_INET;
svrAdd.sin_addr.s_addr = INADDR_ANY;
svrAdd.sin_port = htons(portNo);
cout << "port number is : " << portNo << endl;
//bind socket
int bound = bind(listenFd, (struct sockaddr *)&svrAdd, sizeof(svrAdd));
if ( bound < 0 ){
cerr << "ERROR: cannot bind, error number: " << errno << endl;
return 0;
}
listen(listenFd, 5);
len = sizeof(clntAdd);
int noTread = 0;
while(noTread < 3){
cout << "Listening..." << endl;
if (connFd = accept(listenFd, (struct sockaddr*)&clntAdd, &len)<0){
cerr << "ERROR: cannot accept connection" << endl;
return 0;
}
else{
cout << "Connection successful" << endl;
}
pthread_create(&threadArr[noTread], NULL, task1, NULL);
noTread++;
}
for (int i=0; i < 3; i++){
pthread_join(threadArr[i], NULL);
}
/*int sockfd, newsockfd, portno, clilen, n;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
if (argc < 2){
fprintf(stderr, "ERROR, no port provided");
exit(1);
}
if(sockfd = socket(AF_INET, SOCK_STREAM, 0) < 0){
error("ERROR opening socket");
}
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(portno);
serv_addr.sin_addr.s_addr - INADDR_ANY;
if(bind(sockfd, (struct sockaddr*)&))*/
return 0;
}
void *task1(void *dummyPt){
cout << "Thread number: " << pthread_self() << endl;
char test[300];
bzero(test, 301);
bool loop = false;
while (!false){
bzero(test, 301);
read(connFd, test, 300);
string tester(test);
cout << "\n\t\t TESTER = " << tester << endl;
if(tester == "exit"){
break;
}
}
cout << "\n Closing thread and conn" << endl;
close(connFd);
}
The output of the execution:
ERROR: cannot bind, error number: 88
port number is : 7777
RUN SUCCESSFUL (total time: 162ms)
Please help,
Thanks.

Answer 1

if (listenFd = socket(AF_INET, SOCK_STREAM, 0) < 0){
Precedence problem. The result of this condition is to assign zero or 1 to listenFd. Try this:
if ((listenFd = socket(AF_INET, SOCK_STREAM, 0)) < 0){