| OZ++ Sample: InterfaceAddrChangeRequest |
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* InterfaceAddrChangeRequest.cpp
*
*****************************************************************************/
#include <oz++/CommonObject.h>
#include <oz++/Locale.h>
#include <oz++/Exception.h>
#include <oz++/netlink/SocketNetlink.h>
#include <oz++/netlink/SockAddrNetlink.h>
#include <oz++/netlink/InterfaceAddrAttribute.h>
#include <oz++/netlink/NetlinkMsgHeader.h>
#include <oz++/netlink/InterfaceAddrMsg.h>
#include <oz++/netlink/InterfaceAddrAttribute.h>
#include <oz++/netlink/NetlinkRouteAttributeRequest.h>
#include <oz++/netlink/NetlinkReply.h>
#include <oz++/netlink/NetlinkMsgError.h>
//#include <net/if.h>
// Simple program to register a new IPv4 ip address through Netlink++ library
// Note:
// This program should be run as the root user.
namespace OZ {
class InterfaceAddrChangeRequest :public CommonObject {
private:
//Use the following class to be able to register your own route attributes.
NetlinkRouteAttributeRequest<ifaddrmsg> request;
//The following is a communication channel to the kernel.
SocketNetlink socketNetlink;
NetlinkReply<ifaddrmsg> reply;
public:
//Constructor
InterfaceAddrChangeRequest(const char* address)
{
NetlinkMsgHeader header(request.head());
header.type(RTM_NEWADDR);
header.flags(NLM_F_ACK|NLM_F_REQUEST|NLM_F_CREATE|NLM_F_REPLACE);
header.pid(0);
InterfaceAddrMsg body(request.body());
body.family(AF_INET);
body.prefixlen(24);
body.flags(IFA_F_PERMANENT);
body.scope(RT_SCOPE_UNIVERSE);
body.index(2);
header.length( NLMSG_LENGTH(body.size()) );
struct in_addr inaddr;
if (address == NULL || inet_pton(AF_INET, address, (void*)&inaddr) <= 0) {
throw IException("Invaid ipaddress %s", address);
}
// Add the ipaddress of inaddr to the request as an IFA_LOCAL route attribute.
bool r = request.addAttribute(IFA_LOCAL, (void*)&inaddr, sizeof(inaddr));
if (r == false) {
throw IException("Failed to add an attribiute for IFA_LOCAL");
}
}
int bind()
{
SockAddrNetlink addr;
addr.setFamily(AF_NETLINK);
addr.setGroups(0);
return socketNetlink.bind(addr);
}
int send()
{
RouteAttributeRequest<ifaddrmsg>& req = request.request();
size_t length = request.length();
return socketNetlink.send((const char*)&req, length, 0);
}
void recv()
{
while (true) {
bzero(&reply, sizeof(reply));
int n = socketNetlink.recv((char*)&reply, sizeof(reply), 0);
if (n < 0){
break;;
}
NetlinkMsgHeader replyMsgHeader(reply.head);
if (replyMsgHeader.isError()) {
NetlinkMsgError ack(replyMsgHeader.errorMsg());
ack.display();
break;
}
fflush(stdout);
} //while
}
};
}
//
int main(int argc, char* argv[])
{
Locale locale;
if (argc != 2) {
printf("Usage: %s IPv4address(*.*.*.*) \n", argv[0]);
return 0;
}
try {
const char* address = argv[1];
InterfaceAddrChangeRequest changeRequest(address);
changeRequest.bind();
changeRequest.send();
changeRequest.recv();
} catch (Exception& ex) {
ex.display();
}
return 0;
}