Programming Forums > Application Development > C++

layer · Apr 25th, 2005, 6:00 PM

Hey guys... I'm just learning the basics of WinSock... And was in need of some help

Heres my code:

#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
#include <winsock.h>

using namespace std;

int main(){
    cout << "SweetTalk will now start up..." << endl;
    WORD sockversion;
    WSADATA wsadata;
    int ret;
    sockversion = MAKEWORD(1, 1);	
    WSAStartup(sockversion, &wsadata);
    SOCKET listenS;
    listenS = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (listenS == INVALID_SOCKET) 
    {
                WSACleanup();
                cout << "SweetTalk now needs to exit due to technical difficulties." << endl << "Press any key to quit" << endl;
                getch();
                return EXIT_SUCCESS;
    }
    SOCKADDR_IN info;
    info.sin_family = AF_INET;
    info.sin_addr.s_addr = INADDR_ANY;
    info.sin_port = htons(8888);
    ret = bind(listenS,(LPSOCKADDR)&info,sizeof(struct sockaddr));
    if (ret == SOCKET_ERROR)
    {
            WSACleanup();
            cout << "SweetTalk now needs to exit due to technical difficulties." << endl << "Press any key to quit" << endl;
            getch();
            return EXIT_SUCCESS;
    }
    
    ret = listen(listenS, 5);
    if (ret == SOCKET_ERROR)
    {
            WSACleanup();
            cout << "SweetTalk now needs to exit due to technical difficulties." << endl << "Press any key to quit" << endl;
            getch();
            return EXIT_SUCCESS;
    }
    
            
    
    SOCKET client;
    client = accept(listenS, NULL, NULL);
    
    if (client == INVALID_SOCKET)
    {
            WSACleanup();
            cout << "SweetTalk now needs to exit due to an invalid client." << endl << "Press any key to quit" << endl;
            getch();
            return EXIT_SUCCESS;
    }
    
    closesocket(client);
    closesocket(listenS);
    
    WSACleanup();
    getch();
    return 0;
}

Now I get these errors...:

Quote:

Compiler: Default compiler
Executing g++.exe...
g++.exe "C:\Documents and Settings\MYNAME\Desktop\WinSock\main.cpp" -o "C:\Documents and Settings\MYNAME\Desktop\WinSock\main.exe" -I"C:\Dev-Cpp\lib\gcc\mingw32\3.4.2\include" -I"C:\Dev-Cpp\include\c++\3.4.2\backward" -I"C:\Dev-Cpp\include\c++\3.4.2\mingw32" -I"C:\Dev-Cpp\include\c++\3.4.2" -I"C:\Dev-Cpp\include" -L"C:\Dev-Cpp\lib"
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x16f):main.cpp: undefined reference to `WSAStartup@8'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x18e):main.cpp: undefined reference to `socket@12'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x1a5):main.cpp: undefined reference to `WSACleanup@0'

C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x21c):main.cpp: undefined reference to `htons@4'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x246):main.cpp: undefined reference to `bind@12'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x25d):main.cpp: undefined reference to `WSACleanup@0'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x2cb):main.cpp: undefined reference to `listen@8'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x2e2):main.cpp: undefined reference to `WSACleanup@0'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x358):main.cpp: undefined reference to `accept@12'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x36f):main.cpp: undefined reference to `WSACleanup@0'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x3d2):main.cpp: undefined reference to `closesocket@4'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x3e3):main.cpp: undefined reference to `closesocket@4'
C:\DOCUME~1\MYNAME~1\LOCALS~1\Temp/ccU9baaa.o(.text+0x3eb):main.cpp: undefined reference to `WSACleanup@0'
collect2: ld returned 1 exit status

Execution terminated

Now, that's all the errors I get... I've done some googling, but everything I find doesn't pinpoint my EXACT problem... Which is a problem

If anyone would help me out, I'd really, really, really appreciate it!

And then if you could go check out my GetSystemTimes problem too, that'd be neat!

EDIT: Replaced my name with "MYNAME"... :p

Eggbert · Apr 25th, 2005, 6:19 PM

Are you linking with wsock32.lib?

layer · Apr 25th, 2005, 6:47 PM

I'm linking... Yes, but with wsock32.lib, no... How would I got about doing that, do I do I go "Tools>Compiler Options" and then type in whatever I got to type into the linker command line options... Or, do I go "Execute>Paremeters" and type in whatever I got to type in... Or does it matter?
But the question is, what do I type in?

EDIT: I'm using Dev-Cpp

layer · Apr 25th, 2005, 6:54 PM

Haha! Got it, Eggbert you're the best!

With a little searching on google, I found the answer here: http://forums.devshed.com/archive/t-116433 on the 3 post down! Thanks again for the help

layer · Apr 25th, 2005, 8:58 PM

Sorry... Need some help again

First, I'll start with the code:

(Toggle Plain Text)

#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
#include <winsock.h>

using namespace std;

int main(){
    system("title SweetTalk");
    char buffer[30];
    int ip;
    cout << "SweetTalk will now start up..." << endl;
    cout << "What is the IP address you would like to connect to?: " << endl;
    cin.getline(buffer,30);
    ip = atof(buffer);
    WORD sockversion;
    WSADATA wsadata;
    int ret;
    sockversion = MAKEWORD(1, 1);	
    WSAStartup(sockversion, &wsadata);
    LPHOSTENT host;
    in_addr eHost;
    eHost.s_addr = inet_addr(ip);
    host = gethostbyaddr((const char*)&eHost, sizeof(struct in_addr), AF_INET);
    if (!host)
    {
              cout << "You specified a wrong addrress, SweetTalk will now exit!" << endl;
              cout << "Press any key to exit" << endl;
              getch();
              WSACleanup();
              return EXIT_SUCCESS;
    }
    SOCKET socketB;
    socketB = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (socketB == INVALID_SOCKET)
    {
                cout << "Failed to create socket, press any key to exit" << endl;
                WSACleanup();
                getch();
                return EXIT_SUCCESS;
    }
    SOCKADDR_IN sInfo;
    sInfo.sin_family = AF_INET;
    sInfo.sin_addr = *((LPIN_ADDR)*host->h_addr_list);
    sInfo.sin_port = htons(80);
    ret = connect(socketB, (LPSOCKADDR)&sInfo, sizeof(struct sockaddr));
    if (ret == SOCKET_ERROR)
    {
            cout << "Failed to connect, press any key to exit!" << endl;
            WSACleanup();
            getch();
    }
    
    closesocket(socketB);
    WSACleanup();
    return 0;
}

Now, when trying to compile that, with the "-lwinsock32" in the compiler options under Dev-Cpp using the MingW compiler, I get the following errors (only 3

):

Quote:

Compiler: Default compiler
Executing g++.exe...
g++.exe "C:\Documents and Settings\MYNAME\Desktop\WinSock\mainb.cpp" -o "C:\Documents and Settings\MYNAME\Desktop\WinSock\mainb.exe" -I"C:\Dev-Cpp\lib\gcc\mingw32\3.4.2\include" -I"C:\Dev-Cpp\include\c++\3.4.2\backward" -I"C:\Dev-Cpp\include\c++\3.4.2\mingw32" -I"C:\Dev-Cpp\include\c++\3.4.2" -I"C:\Dev-Cpp\include" -L"C:\Dev-Cpp\lib" -lwsock32
C:\Documents and Settings\MYNAME\Desktop\WinSock\mainb.cpp: In function `int main()':
C:\Documents and Settings\MYNAME\Desktop\WinSock\mainb.cpp:16: warning: converting to `int' from `double'
C:\Documents and Settings\MYNAME\Desktop\WinSock\mainb.cpp:24: error: invalid conversion from `int' to `const char*'
C:\Documents and Settings\MYNAME\Desktop\WinSock\mainb.cpp:24: error: initializing argument 1 of `long unsigned int inet_addr(const char*)'

Execution terminated

Any ideas on how to fix these conversion things...? Never was so good when I got the conversion errors please

Thanks agaiN!

Eggbert · Apr 25th, 2005, 9:17 PM

>ip = atof(buffer);
atof returns a double, but ip is declared as int.

>eHost.s_addr = inet_addr(ip);
inet_addr expects a string, not an integer.

One possible solution is to remove ip from the equation completely:

(Toggle Plain Text)

cin.getline(buffer,30);
//...
eHost.s_addr = inet_addr(buffer);

layer · Apr 25th, 2005, 9:41 PM

Geez man, thanks again! Works like a charm!

Here's the working code (soon, I will have my first instant messenger together

) And notice how there is no errors at the bottom

Thanks Eggbert!

(Toggle Plain Text)

#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
#include <winsock.h>

using namespace std;

int main(){
    system("title SweetTalk");
    char buffer[30];
    cout << "SweetTalk will now start up..." << endl;
    cout << "What is the IP address you would like to connect to?: " << endl;
    cin.getline(buffer,30);
    WORD sockversion;
    WSADATA wsadata;
    int ret;
    sockversion = MAKEWORD(1, 1);	
    WSAStartup(sockversion, &wsadata);
    LPHOSTENT host;
    in_addr eHost;
    eHost.s_addr = inet_addr(buffer);
    host = gethostbyaddr((const char*)&eHost, sizeof(struct in_addr), AF_INET);
    if (!host)
    {
              cout << "You specified a wrong addrress, SweetTalk will now exit!" << endl;
              cout << "Press any key to exit" << endl;
              getch();
              WSACleanup();
              return EXIT_SUCCESS;
    }
    SOCKET socketB;
    socketB = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (socketB == INVALID_SOCKET)
    {
                cout << "Failed to create socket, press any key to exit" << endl;
                WSACleanup();
                getch();
                return EXIT_SUCCESS;
    }
    SOCKADDR_IN sInfo;
    sInfo.sin_family = AF_INET;
    sInfo.sin_addr = *((LPIN_ADDR)*host->h_addr_list);
    sInfo.sin_port = htons(80);
    ret = connect(socketB, (LPSOCKADDR)&sInfo, sizeof(struct sockaddr));
    if (ret == SOCKET_ERROR)
    {
            cout << "Failed to connect, press any key to exit!" << endl;
            WSACleanup();
            getch();
    }
    
    closesocket(socketB);
    WSACleanup();
    return 0;
}

Apr 25th, 2005, 9:17 PM	#6
Eggbert Professional Programmer Join Date: Nov 2004 Posts: 250 Rep Power: 5	>ip = atof(buffer); atof returns a double, but ip is declared as int. >eHost.s_addr = inet_addr(ip); inet_addr expects a string, not an integer. One possible solution is to remove ip from the equation completely: (Toggle Plain Text) cin.getline(buffer,30); //... eHost.s_addr = inet_addr(buffer); cin.getline(buffer,30); //... eHost.s_addr = inet_addr(buffer);

Apr 25th, 2005, 9:41 PM	#7
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	Geez man, thanks again! Works like a charm! Here's the working code (soon, I will have my first instant messenger together ) And notice how there is no errors at the bottom Thanks Eggbert! (Toggle Plain Text) #include <cstdlib> #include <iostream> #include <conio.h> #include <windows.h> #include <winsock.h> using namespace std; int main(){ system("title SweetTalk"); char buffer[30]; cout << "SweetTalk will now start up..." << endl; cout << "What is the IP address you would like to connect to?: " << endl; cin.getline(buffer,30); WORD sockversion; WSADATA wsadata; int ret; sockversion = MAKEWORD(1, 1); WSAStartup(sockversion, &wsadata); LPHOSTENT host; in_addr eHost; eHost.s_addr = inet_addr(buffer); host = gethostbyaddr((const char)&eHost, sizeof(struct in_addr), AF_INET); if (!host) { cout << "You specified a wrong addrress, SweetTalk will now exit!" << endl; cout << "Press any key to exit" << endl; getch(); WSACleanup(); return EXIT_SUCCESS; } SOCKET socketB; socketB = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (socketB == INVALID_SOCKET) { cout << "Failed to create socket, press any key to exit" << endl; WSACleanup(); getch(); return EXIT_SUCCESS; } SOCKADDR_IN sInfo; sInfo.sin_family = AF_INET; sInfo.sin_addr = ((LPIN_ADDR)host->h_addr_list); sInfo.sin_port = htons(80); ret = connect(socketB, (LPSOCKADDR)&sInfo, sizeof(struct sockaddr)); if (ret == SOCKET_ERROR) { cout << "Failed to connect, press any key to exit!" << endl; WSACleanup(); getch(); } closesocket(socketB); WSACleanup(); return 0; } #include <cstdlib> #include <iostream> #include <conio.h> #include <windows.h> #include <winsock.h> using namespace std; int main(){ system("title SweetTalk"); char buffer[30]; cout << "SweetTalk will now start up..." << endl; cout << "What is the IP address you would like to connect to?: " << endl; cin.getline(buffer,30); WORD sockversion; WSADATA wsadata; int ret; sockversion = MAKEWORD(1, 1); WSAStartup(sockversion, &wsadata); LPHOSTENT host; in_addr eHost; eHost.s_addr = inet_addr(buffer); host = gethostbyaddr((const char)&eHost, sizeof(struct in_addr), AF_INET); if (!host) { cout << "You specified a wrong addrress, SweetTalk will now exit!" << endl; cout << "Press any key to exit" << endl; getch(); WSACleanup(); return EXIT_SUCCESS; } SOCKET socketB; socketB = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (socketB == INVALID_SOCKET) { cout << "Failed to create socket, press any key to exit" << endl; WSACleanup(); getch(); return EXIT_SUCCESS; } SOCKADDR_IN sInfo; sInfo.sin_family = AF_INET; sInfo.sin_addr = ((LPIN_ADDR)host->h_addr_list); sInfo.sin_port = htons(80); ret = connect(socketB, (LPSOCKADDR)&sInfo, sizeof(struct sockaddr)); if (ret == SOCKET_ERROR) { cout << "Failed to connect, press any key to exit!" << endl; WSACleanup(); getch(); } closesocket(socketB); WSACleanup(); return 0; }

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Apr 25th, 2005, 6:19 PM	#2
Eggbert Professional Programmer Join Date: Nov 2004 Posts: 250 Rep Power: 5	Are you linking with wsock32.lib?

Apr 25th, 2005, 6:47 PM	#3
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	I'm linking... Yes, but with wsock32.lib, no... How would I got about doing that, do I do I go "Tools>Compiler Options" and then type in whatever I got to type into the linker command line options... Or, do I go "Execute>Paremeters" and type in whatever I got to type in... Or does it matter? But the question is, what do I type in? EDIT: I'm using Dev-Cpp

Apr 25th, 2005, 6:54 PM	#4
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	Haha! Got it, Eggbert you're the best! With a little searching on google, I found the answer here: http://forums.devshed.com/archive/t-116433 on the 3 post down! Thanks again for the help

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Programming Forums > Application Development > C++

WinSock going good, but undefined references...?