< SSL & ATM Options | Socket Options & IOCTLs Main | SIO_GET_ATM_ADDRESS etc Example >

Socket Options and Ioctls 7 part 5

What do we have in this chapter 7 part 5?

The IP_TOS and Type-of-Service Bit Program Example
The SIO_ADDRESS_LIST_QUERY Program Example

The IP_TOS and Type-of-Service Bit Program Example

Create a new empty Win32 console mode application and add the project/solution name.

Winsock 2 socket options and ioctls: The IP_TOS and Type-of-Service Bit program example

Add the following source code.

// Description:

// This sample sets the Type-of-Service bit and sends

// some datagrams. To really see the results of this

// option you need to capture the packets with Microsoft

// Network Monitor (netmon) to view the actual packets.

// Command line arguments

// Ip_tos ip

// ip IP Address

// Link to ws2_32.lib

#include <winsock2.h>

#include <ws2tcpip.h>

#include <stdio.h>

// Function: main

// Description:

// Load Winsock, create a datagram socket, set the IP_TOS

// option and send some packets.

int main(int argc, char **argv)

{

WSADATA wsd;

SOCKET s;

SOCKADDR_IN remote;

char *str="This is a test string from sender!";

int ret, iTos;

if(argc < 2)

{

printf("Usage: %s <IP_Address_to_send>\n", argv[0]);

printf("Example %s 74.125.45.100\n", argv[0]);

exit(1);

}

// Load Winsock

if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)

{

printf("WSAStartup() failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("WSAStartup() is pretty fine!\n");

// Create a socket

s = WSASocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, 0,WSA_FLAG_OVERLAPPED);

if (s == INVALID_SOCKET)

{

printf("WSASocket() failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("WSASocket() is OK!\n");

// Set the TOS bit

iTos = 1;

ret = setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&iTos, sizeof(iTos));

if (ret == SOCKET_ERROR)

{

printf("setsockopt(IP_TOS) failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("setsockopt(IP_TOS) should be OK!\n");

// Perform a sendto()

printf("Sending all my love....\n");

remote.sin_family = AF_INET;

remote.sin_addr.s_addr = inet_addr(argv[1]);

remote.sin_port = htons(5150);

ret = sendto(s, str, strlen(str), 0, (SOCKADDR *)&remote, sizeof(remote));

if (ret == SOCKET_ERROR)

{

printf("sendto() failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("sendto() is OK!\n");

printf("Wrote %d bytes...\n", ret);

// Cleanup

if(closesocket(s) == 0)

printf("closesocket() should be fine!\n");

else

printf("closesocket() failed with error code %d\n", WSAGetLastError());

if(WSACleanup() == 0)

printf("WSACleanup() is OK!\n");

else

printf("WSACleanup() failed with error code %d\n", WSAGetLastError());

return 0;

}

Build and run the project.

---------------------------------------------------------

Winsock 2 socket options and ioctls: The IP_TOS and Type-of-Service Bit program example, sample output

The SIO_ADDRESS_LIST_QUERY Program Example

Create a new empty Win32 console mode application and add the project/solution name.

Winsock 2 socket options and ioctls: The SIO_ADDRESS_LIST_QUERY program example

Add the following source code.

// Description:

// This sample shows how to use the SIO_ADDRESS_LIST_QUERY

// ioctl. This is a Windows 2000 command which lists the

// local interfaces availability.

// Link to ws2_32.lib

#include <winsock2.h>

#include <ws2tcpip.h>

#include <stdio.h>

// Function: main

// Description: Load Winsock, create a socket, and perform the interface query

int main(int argc, char **argv)

{

WSADATA wsd;

SOCKET s;

DWORD dwBytesRet=0;

char buf[1024];

int ret, i;

SOCKET_ADDRESS_LIST *slist;

SOCKADDR_IN *addr;

// Load Winsock

if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)

{

printf("WSAStartup() failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("WSAStartup() is OK!\n");

s = WSASocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, 0, WSA_FLAG_OVERLAPPED);

if (s == INVALID_SOCKET)

{

printf("WSASocket() failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("WSASocket() is OK!\n");

// Get the address list

ret = WSAIoctl(s, SIO_ADDRESS_LIST_QUERY, NULL, 0, buf, 1024, &dwBytesRet, NULL, NULL);

if (ret == SOCKET_ERROR)

{

printf("WSAIoctl(SIO_ADDRESS_LIST_QUERY) failed with error code %d\n", WSAGetLastError());

return -1;

}

else

printf("WSAIoctl(SIO_ADDRESS_LIST_QUERY) is OK!\n");

printf("Bytes returned: %d bytes\n", dwBytesRet);

// Print the results

slist = (SOCKET_ADDRESS_LIST *)buf;

printf(" Addr Count: %d\n", slist->iAddressCount);

for(i=0; i < slist->iAddressCount ;i++)

{

addr = (SOCKADDR_IN *) slist->Address[i].lpSockaddr;

printf(" Addr [%02d]: %s\n", i, inet_ntoa(addr->sin_addr));

printf("Addr Length [%02d]: %d bytes\n", i, slist->Address[i].iSockaddrLength);

}

// Cleanup

if(closesocket(s) == 0)

printf("closesocket() should be fine!\n");

else

printf("closesocket() failed with error code %d\n", WSAGetLastError());

if(WSACleanup() == 0)

printf("WSACleanup() is OK!\n");

else

printf("WSACleanup() failed with error code %d\n", WSAGetLastError());

return 0;

}

Build and run the project.

Winsock 2 socket options and ioctls: The SIO_ADDRESS_LIST_QUERY program example - a sample output

< SSL & ATM Options | Socket Options & IOCTLs Main | SIO_GET_ATM_ADDRESS etc Example >