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/*
* networkmanager.cpp
*
* Created on: Sep 5, 2011
* Author: niklas
*/
#include "networkmanager.h"
NetworkManager::NetworkManager() {
// TODO Auto-generated constructor stub
}
NetworkManager::~NetworkManager() {
// TODO Auto-generated destructor stub
}
/**
* This method adds /replaces the default route.
* This method adds /replaces the default route.
* To keep it modular, it is possible
* to specify an ip address family.
*
* @param ifName
* the interface name
*
* @param gateway
* the gateway address (e.g: 192.168.0.254)
* @param mss
* the mss.
* @param af
* specify the family type of the ip address.
* possible values are: AF_INET for an IPv4 address
* AF_INET6 for an IPv6 address
*
* @return
* return -1 if an error happened.
* return 0 if everything was ok.
*/
int NetworkManager::replaceDefaultRoute(QString ifname, QString gateway,
int mss, int af) {
struct nl_cache *cache;
struct nl_handle* rtsock;
struct nl_addr * gw;
struct rtnl_route * route;
int retval, iface_idx;
QByteArray ba_ifn = ifname.toAscii();
char * ifn = ba_ifn.data();
QByteArray ba_gw = gateway.toAscii();
char * gwaddr = ba_gw.data();
qDebug() << "---doRoute() gwaddr" << gwaddr;
if (!(gw = nl_addr_parse(gwaddr, af))) {
qDebug() << "Invalid router address given: %s\n", gwaddr;
return -1;
}
rtsock = nl_handle_alloc();
nl_connect(rtsock, NETLINK_ROUTE);
if ((cache = rtnl_link_alloc_cache(rtsock)) == NULL) {
qDebug() << "error with link cache alloc \n";
}
iface_idx = rtnl_link_name2i(cache, ifn);
route = rtnl_route_alloc();
rtnl_route_set_scope(route, RT_SCOPE_UNIVERSE);
rtnl_route_set_gateway(route, gw);
rtnl_route_set_oif(route, iface_idx);
if (mss > 0) {
rtnl_route_set_metric(route, RTAX_ADVMSS, mss);
}
retval = rtnl_route_add(rtsock, route, NLM_F_REPLACE);
qDebug() << "return value:" << retval << ":" << strerror(-retval);
rtnl_route_put(route);
nl_addr_put(gw);
nl_handle_destroy(rtsock);
return retval;
}
/**
* This method brings an interface up or down.
*
* @param ifname
* is a string which contains the interface name which is going down or up.
*
* @param up
* is a bool. true means. we bring the interface up.
* false meand. we bring the interface down.
* @return
* 0 if everything is ok
* else an error
*/
int NetworkManager::bringInterfaceUpDown(QString ifname, bool up) {
struct nl_cache *cache;
struct nl_handle* rtsock;
struct rtnl_link* request = NULL;
struct rtnl_link* old = NULL;
int retval;
QByteArray ba_ifn = ifname.toAscii();
char * ifn = ba_ifn.data();
if(!(request = rtnl_link_alloc())) {
qDebug() << "error. couldn't allocate a rtnl link";
return -1;
}
rtsock = nl_handle_alloc();
nl_connect(rtsock, NETLINK_ROUTE);
if(up) {
rtnl_link_set_flags(request,IFF_UP);
} else {
rtnl_link_unset_flags(request, IFF_UP);
}
if ((cache = rtnl_link_alloc_cache(rtsock)) == NULL) {
qDebug() << "error with link cache alloc ";
}
old = rtnl_link_get_by_name(cache,ifn);
if (old) {
qDebug() << "change link";
retval = rtnl_link_change(rtsock, old, request, 0);
} else {
qDebug() << "change failed";
retval = -1;
qDebug() << "return value:" << retval << ":" << strerror(-retval);
}
rtnl_link_put(old);
rtnl_link_put(request);
nl_handle_destroy(rtsock);
return retval;
}
/**
* This method adds or deletes a route.
* This method adds or deletes a route. According to the action,
* you can delete a route or add a route from/to the
* main routing table. In most cases, this method will be used for deleting
* or adding a default rout. To keep it modular, it is possible
* to specify an ip address family.
*
* @param ifName
* the interface name.
* @param destination
* the destination address (e.g: 0.0.0.0)
*
* @param gateway
* the gateway address (e.g: 192.168.0.254)
*
* @param af
* specify the family type of the ip address.
* possible values are: AF_INET for an IPv4 address
* AF_INET6 for an IPv6 address
*
* @param action
* possible values are: 0: perform add route
* 1: perform delete route
*
* @return
* return 1 if an error happened.
* return 0 if everything was ok.
*/
int NetworkManager::doRoute(QString ifName, QString destination, QString gateway, int af, int action) {return 0;}
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