C++ (Cpp) unl_genl_request_singleの例

コード例 #1

int mac80211_get_coverageclass(char *interface) {
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct nl_msg *msg;
	struct genlmsghdr *gnlh;
	int phy;
	unsigned char coverage=0;

	phy = mac80211_get_phyidx_by_vifname(interface);
	if (phy == -1) return 0;

	msg = unl_genl_msg(&unl, NL80211_CMD_GET_WIPHY, false);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, phy);
	if (unl_genl_request_single(&unl, msg, &msg) < 0)
		return 0;
	if (!msg) return 0;
	gnlh=nlmsg_data(nlmsg_hdr(msg));
	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);
	if (tb[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
		coverage = nla_get_u8(tb[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
		/* See handle_distance() for an explanation where the '450' comes from */
		// printf("\tCoverage class: %d (up to %dm)\n", coverage, 450 * coverage);
	}
	// printf ("%d\n", coverage);
	nlmsg_free(msg);
	return coverage;
nla_put_failure:
	nlmsg_free(msg);
	return 0;
}

コード例 #2

static int unl_genl_multicast_id(struct unl *unl, const char *name)
{
	struct nlattr *tb[CTRL_ATTR_MCAST_GRP_MAX + 1];
	struct nlattr *groups, *group;
	struct nl_msg *msg;
	int ctrlid;
	int ret = -1;
	int rem;

	msg = nlmsg_alloc();
	if (!msg)
		return -1;

	ctrlid = genl_ctrl_resolve(unl->sock, "nlctrl");
	genlmsg_put(msg, 0, 0, ctrlid, 0, 0, CTRL_CMD_GETFAMILY, 0);
	NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, unl->family_name);
	unl_genl_request_single(unl, msg, &msg);
	if (!msg)
		goto nla_put_failure;

	groups = unl_find_attr(unl, msg, CTRL_ATTR_MCAST_GROUPS);
	if (!groups)
		goto fail;

	nla_for_each_nested(group, groups, rem) {
		const char *gn;

		nla_parse(tb, CTRL_ATTR_MCAST_GRP_MAX, nla_data(group),
			  nla_len(group), NULL);

		if (!tb[CTRL_ATTR_MCAST_GRP_NAME] ||
		    !tb[CTRL_ATTR_MCAST_GRP_ID])
			continue;

		gn = nla_data(tb[CTRL_ATTR_MCAST_GRP_NAME]);
		if (strcmp(gn, name) != 0)
			continue;

		ret = nla_get_u32(tb[CTRL_ATTR_MCAST_GRP_ID]);
		break;
	}

fail:
	nlmsg_free(msg);
nla_put_failure:
	return ret;
}

コード例 #3

int unl_nl80211_wdev_to_phy(struct unl *unl, int wdev)
{
	struct nl_msg *msg;
	struct nlattr *attr;
	int ret = -1;

	msg = unl_genl_msg(unl, NL80211_CMD_GET_INTERFACE, false);
	if (!msg)
		return -1;

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev);
	if (unl_genl_request_single(unl, msg, &msg) < 0)
		return -1;

	attr = unl_find_attr(unl, msg, NL80211_ATTR_WIPHY);
	if (!attr)
		goto out;

	ret = nla_get_u32(attr);
out:
nla_put_failure:
	nlmsg_free(msg);
	return ret;
}