C++ (Cpp) send_nlmsg Examples

Example #1

File: linux_unicast_route.cpp Project: hugosantos/mrd6

bool linux_unicast_router::lookup_prefix(const in6_addr &addr, lookup_result &reply) const {
    /* Not fully inited yet */
    if (rt_bcast_sock.fd() < 0)
        return false;

    netlink_msg *msg = (netlink_msg *)buffer;

    msg->build(RTM_GETROUTE);
    msg->addattr(RTA_DST, &addr, sizeof(in6_addr));
    msg->r.rtm_dst_len = 128;

    reply.dev = -1;

    if (send_nlmsg(msg, msg)) {
        if (msg->r.rtm_family != AF_INET6)
            return false;

        rtattr *tb[RTA_MAX + 1];
        memset(tb, 0, sizeof(tb));

        msg->parse_rtatable(tb, RTA_MAX, RTM_RTA(NLMSG_DATA(&msg->n)),
                            msg->length() - NLMSG_LENGTH(sizeof(rtmsg)));

        parse_prefix_rec(tb, msg->r.rtm_dst_len,
                         msg->r.rtm_protocol, reply);

        return true;
    }

    return false;
}

Example #2

File: meshd-nl80211.c Project: champtar/authsae

static int set_mesh_conf(struct netlink_config_s *nlcfg,
                         struct mesh_node *mesh, uint32_t changed)
{

    struct nl_msg *msg;
    uint8_t cmd = NL80211_CMD_SET_MESH_CONFIG;
    int ret = 0;
    char *pret;

    sae_debug(MESHD_DEBUG, "%s(%p, %d)\n", __FUNCTION__, nlcfg, changed);
    msg = nlmsg_alloc();
    if (!msg)
        return -ENOMEM;

    pret = genlmsg_put(msg, 0, NL_AUTO_SEQ,
            genl_family_get_id(nlcfg->nl80211), 0, 0, cmd, 0);

    if (pret == NULL)
        goto nla_put_failure;

    struct nlattr *container = nla_nest_start(msg,
            NL80211_ATTR_MESH_CONFIG);

    if (!container)
        goto nla_put_failure;

    if (changed & MESH_CONF_CHANGED_HT)
        NLA_PUT_U32(msg, NL80211_MESHCONF_HT_OPMODE, mesh->conf->ht_prot_mode);
    nla_nest_end(msg, container);

    NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, nlcfg->ifindex);

    ret = send_nlmsg(nlcfg->nl_sock, msg);
    sae_debug(MESHD_DEBUG, "set meshconf (seq num=%d)\n",
            nlmsg_hdr(msg)->nlmsg_seq);
    if (ret < 0)
        sae_debug(MESHD_DEBUG, "set meshconf failed: %d (%s)\n", ret,
                strerror(-ret));
    return ret;
nla_put_failure:
    nlmsg_free(msg);
    return -ENOBUFS;
}

Example #3

File: meshd-nl80211.c Project: champtar/authsae

static int tx_frame(struct netlink_config_s *nlcfg, struct mesh_node *mesh,
                    unsigned char *frame, int len)
{
    struct nl_msg *msg;
    uint8_t cmd = NL80211_CMD_FRAME;
    int ret = 0;
    char *pret;

    sae_debug(MESHD_DEBUG, "%s(%p, %p, %d)\n", __FUNCTION__, nlcfg, frame, len);
    msg = nlmsg_alloc();
    if (!msg)
        return -ENOMEM;

    if (!frame || !len)
        return -EINVAL;

    pret = genlmsg_put(msg, 0, NL_AUTO_SEQ,
            genl_family_get_id(nlcfg->nl80211), 0, 0, cmd, 0);

    if (pret == NULL)
        goto nla_put_failure;

    NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, nlcfg->ifindex);
    NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, mesh->freq);
    NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);

    ret = send_nlmsg(nlcfg->nl_sock, msg);
    sae_debug(MESHD_DEBUG, "tx frame (seq num=%d)\n",
            nlmsg_hdr(msg)->nlmsg_seq);
    if (ret < 0)
        sae_debug(MESHD_DEBUG, "tx frame failed: %d (%s)\n", ret,
                strerror(-ret));
    else
        sae_hexdump(MESHD_DEBUG, "tx frame", frame, len);
    return ret;
nla_put_failure:
    nlmsg_free(msg);
    return -ENOBUFS;
}