nexmon – Rev 1

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#include <errno.h>
#include <string.h>

#include <netlink/genl/genl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>

#include "nl80211.h"
#include "iw.h"

static int set_power_save(struct nl80211_state *state,
                          struct nl_cb *cb,
                          struct nl_msg *msg,
                          int argc, char **argv,
                          enum id_input id)
{
        enum nl80211_ps_state ps_state;

        if (argc != 1) {
                printf("Invalid parameters!\n");
                return 2;
        }

        if (strcmp(argv[0], "on") == 0)
                ps_state = NL80211_PS_ENABLED;
        else if (strcmp(argv[0], "off") == 0)
                ps_state = NL80211_PS_DISABLED;
        else {
                printf("Invalid parameter: %s\n", argv[0]);
                return 2;
        }

        NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);

        return 0;

 nla_put_failure:
        return -ENOBUFS;
}

COMMAND(set, power_save, "<on|off>",
        NL80211_CMD_SET_POWER_SAVE, 0, CIB_NETDEV, set_power_save,
        "Set power save state to on or off.");

static int print_power_save_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *attrs[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        const char *s;

        nla_parse(attrs, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);

        if (!attrs[NL80211_ATTR_PS_STATE])
                return NL_SKIP;

        switch (nla_get_u32(attrs[NL80211_ATTR_PS_STATE])) {
        case NL80211_PS_ENABLED:
                s = "on";
                break;
        case NL80211_PS_DISABLED:
        default:
                s = "off";
                break;
        }

        printf("Power save: %s\n", s);

        return NL_SKIP;
}

static int get_power_save(struct nl80211_state *state,
                                   struct nl_cb *cb,
                                   struct nl_msg *msg,
                                   int argc, char **argv,
                                   enum id_input id)
{
        nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
                  print_power_save_handler, NULL);
        return 0;
}

COMMAND(get, power_save, "<param>",
        NL80211_CMD_GET_POWER_SAVE, 0, CIB_NETDEV, get_power_save,
        "Retrieve power save state.");