Exemple #1
0
int sysnet_interface_set_mtu(VPNInterface *i, unsigned int mtu)
{
    int err;

    struct nl_cache *link_cache;
    struct nl_sock *sock;
    struct rtnl_link *link;
    struct rtnl_link *new_link;

    sock = nl_socket_alloc();
    nl_connect(sock, NETLINK_ROUTE);

    rtnl_link_alloc_cache(sock, AF_UNSPEC, &link_cache);
    link = rtnl_link_get_by_name(link_cache, i->name);
    new_link = rtnl_link_alloc();

    if (!link)
    {
        tox_trace(i->context->tox, "can't find link \"%s\"", i->name);
        return -1;
    }

    rtnl_link_set_mtu(new_link, mtu);

    if ((err = rtnl_link_change(sock, link, new_link, 0)) < 0) {
        tox_trace(i->context->tox, "unable to change link \"%s\" flags: %s", rtnl_link_get_name(link), nl_geterror(err));
    }

    rtnl_link_put(link);
    rtnl_link_put(new_link);
    nl_cache_free(link_cache);
    nl_socket_free(sock);

    return 0;
}
Exemple #2
0
TError TNlLink::AddVeth(const std::string &name,
                        const std::string &hw,
                        int mtu, int nsFd) {
    struct rtnl_link *veth, *peer;
    int ret;

    peer = rtnl_link_veth_alloc();
    if (!peer)
        return TError(EError::Unknown, "Unable to allocate veth");

    rtnl_link_set_name(peer, rtnl_link_get_name(Link));

    veth = rtnl_link_veth_get_peer(peer);
    rtnl_link_set_name(veth, name.c_str());

    if (nsFd >= 0)
        rtnl_link_set_ns_fd(veth, nsFd);

    if (mtu > 0) {
        rtnl_link_set_mtu(peer, mtu);
        rtnl_link_set_mtu(veth, mtu);
    }

    if (!hw.empty()) {
        TNlAddr addr;
        TError error = addr.Parse(AF_LLC, hw.c_str());
        if (error)
            return error;
        rtnl_link_set_addr(veth, addr.Addr);
    }

    rtnl_link_set_flags(peer, IFF_UP);

    Dump("add", veth);
    rtnl_link_put(veth);

    Dump("add", peer);
    ret = rtnl_link_add(GetSock(), peer, NLM_F_CREATE | NLM_F_EXCL);
    if (ret < 0) {
        rtnl_link_put(peer);
        return Error(ret, "Cannot add veth");
    }

    rtnl_link_put(peer);

    return Load();
}
Exemple #3
0
/*
 * Set the MTU on the specified device.
 */
int iface_set_interface_mtu(char *ifname, int mtu) {
    int ret = 0;
    struct nl_handle *handle = NULL;
    struct nl_cache *cache = NULL;
    struct rtnl_link *link = NULL;
    struct rtnl_link *request = NULL;

    if (ifname == NULL) {
        return -1;
    }

    if (mtu <= 0) {
        return -2;
    }

    if ((cache = _iface_get_link_cache(&handle)) == NULL) {
        return -3;
    }

    if ((link = rtnl_link_get_by_name(cache, ifname)) == NULL) {
        ret = -4;
        goto ifacemtu_error1;
    }

    request = rtnl_link_alloc();
    rtnl_link_set_mtu(request, mtu);

    if (rtnl_link_change(handle, link, request, 0)) {
        ret = -5;
        goto ifacemtu_error2;
    }

ifacemtu_error2:
    rtnl_link_put(link);
ifacemtu_error1:
    nl_close(handle);
    nl_handle_destroy(handle);

    return ret;
}