I've finally gotten around to remembering my networking stuff. With my internet barely working, I decided to get it up and running on my linux box using manpages first - a simple program that broadcasts and recieves packets. I got it working:
panda@industry:~/sockettest$ ./test --listen &
[1] 2751
panda@industry:~/sockettest$ ./test --broadcast
Sending: My name is Mike and I like rootbeer.
Recieved: My name is Mike and I like rootbeer.
Sending: My name is Mike and I like rootbeer.
Recieved: My name is Mike and I like rootbeer.
^C
panda@industry:~/sockettest$ fg %1
./test --listen
^C
panda@industry:~/sockettest$ _
After this, I ported the program to windows using WinSock2 by looking at the headers. I was pleased to find the program compiled with very few changes, but the program now refuses to work on windows - it runs, but socket() returns -1. What's weird is that checking strerror( errno ) returns "No error". I'm running Windows XP SP2, w/ firewall enabled, although adding the program to the exceptions list dosn't help. I'm running it from the command console:
C:\eclipse\workspace\test.1>Debug\test.1 --listen
socket() failed: No error
TCP/IP is installed and functioning normally, I assume UDP is packaged with that network-wise... even if it isn't, all these combinations (some TCP ones included) also return -1: int udp_socket = socket( PF_INET , SOCK_DGRAM , 0 ); int udp_socket = socket( PF_INET , SOCK_DGRAM , IPPROTO_UDP ); int tcp_socket = socket( PF_INET , SOCK_STREAM , 0 ); int tcp_socket = socket( PF_INET , SOCK_STREAM , IPPROTO_TCP ); Relevant source:
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <string>
using namespace std;
#include <unistd.h>
#include <errno.h>
//Linux headers:
//#include <sys/socket.h>
//#include <netinet/in.h>
//#include <arpa/inet.h>
//Windows headers:
#include <winsock2.h>
int main ( int argc , char ** argv )
{
//*snip* - argument reading code
int udp_socket = socket( PF_INET , SOCK_DGRAM , 0 );
if ( udp_socket == -1 )
{
cerr << "socket() failed: " << strerror( errno ) << endl;
return -1;
}
//*snip* - program never reaches past here on Windows
}
I'm compiling the program using MinGW's GCC: g++ -O0 -g3 -Wall -c -fmessage-length=0 -omain.o ../main.cc g++ -o test.1.exe main.o -lws2_32 0 errors or warnings. Anyone know what I'm doing wrong?
[Edited by - MaulingMonkey on June 8, 2005 5:50:44 PM]
