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authorJonathan McCrohan <jmccrohan@gmail.com>2016-01-30 17:08:40 +0000
committerJonathan McCrohan <jmccrohan@gmail.com>2016-01-30 17:08:40 +0000
commit0b0aac6ce21bcb38d7e03dc2b3ff419861476a24 (patch)
treecaa65d08ef64dfd060a749ccc690efd7bcc2a7b3 /iw_nl80211.c
parentd7ca0c3e555ef0b5250873ddce48ccf2326b017a (diff)
downloadwavemon-0b0aac6ce21bcb38d7e03dc2b3ff419861476a24.tar.gz
Imported Upstream version 0.8.0upstream/0.8.0
Diffstat (limited to 'iw_nl80211.c')
-rw-r--r--iw_nl80211.c730
1 files changed, 730 insertions, 0 deletions
diff --git a/iw_nl80211.c b/iw_nl80211.c
new file mode 100644
index 0000000..5b9c562
--- /dev/null
+++ b/iw_nl80211.c
@@ -0,0 +1,730 @@
+/*
+ * FIXME:
+ * PROTOTYPE: add nl80211 calls to iw_if. Mostly copied/stolen from iw
+ */
+#include "wavemon.h"
+#include <net/if.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "iw_nl80211.h"
+
+/**
+ * handle_cmd: process @cmd
+ * Returns 0 if ok, -errno < 0 on failure
+ * stolen/modified from iw:iw.c
+ */
+int handle_cmd(struct cmd *cmd)
+{
+ struct nl_cb *cb;
+ struct nl_msg *msg;
+ static int nl80211_id = -1;
+ int ret;
+ uint32_t ifindex, idx;
+
+ /*
+ * Initialization of static components:
+ * - per-cmd socket
+ * - global nl80211 ID
+ * - per-cmd interface index (in case conf_ifname() changes)
+ */
+ if (!cmd->sk) {
+ cmd->sk = nl_socket_alloc();
+ if (!cmd->sk)
+ err_sys("failed to allocate netlink socket");
+
+ /* NB: not setting sk buffer size, using default 32Kb */
+ if (genl_connect(cmd->sk))
+ err_sys("failed to connect to GeNetlink");
+ }
+
+ if (nl80211_id < 0) {
+ nl80211_id = genl_ctrl_resolve(cmd->sk, "nl80211");
+ if (nl80211_id < 0)
+ err_sys("nl80211 not found");
+ }
+
+ ifindex = if_nametoindex(conf_ifname());
+ if (ifindex == 0 && errno)
+ err_sys("failed to look up interface %s", conf_ifname());
+
+ /*
+ * Message Preparation
+ */
+ msg = nlmsg_alloc();
+ if (!msg)
+ err_sys("failed to allocate netlink message");
+
+ cb = nl_cb_alloc(IW_NL_CB_DEBUG ? NL_CB_DEBUG : NL_CB_DEFAULT);
+ if (!cb)
+ err_sys("failed to allocate netlink callback");
+
+ genlmsg_put(msg, 0, 0, nl80211_id, 0, cmd->flags, cmd->cmd, 0);
+
+ /* netdev identifier: interface index */
+ NLA_PUT(msg, NL80211_ATTR_IFINDEX, sizeof(ifindex), &ifindex);
+
+ /* Additional attributes */
+ if (cmd->msg_args) {
+ for (idx = 0; idx < cmd->msg_args_len; idx++)
+ NLA_PUT(msg, cmd->msg_args[idx].type,
+ cmd->msg_args[idx].len,
+ cmd->msg_args[idx].data);
+ }
+
+ ret = nl_send_auto_complete(cmd->sk, msg);
+ if (ret < 0)
+ err_sys("failed to send netlink message");
+
+ /*-------------------------------------------------------------------------
+ * Receive loop
+ *-------------------------------------------------------------------------*/
+ nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &ret);
+ nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &ret);
+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &ret);
+ if (cmd->handler)
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cmd->handler, cmd->handler_arg);
+
+ while (ret > 0)
+ nl_recvmsgs(cmd->sk, cb);
+
+ nl_cb_put(cb);
+ nlmsg_free(msg);
+ goto out;
+
+nla_put_failure:
+ err_quit("failed to add attribute to netlink message");
+out:
+ return ret;
+}
+
+/*
+ * STATION COMMANDS
+ */
+/* stolen from iw:station.c */
+void parse_bitrate(struct nlattr *bitrate_attr, char *buf, int buflen)
+{
+ int rate = 0;
+ char *pos = buf;
+ struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
+ static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
+ [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
+ [NL80211_RATE_INFO_BITRATE32] = { .type = NLA_U32 },
+ [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
+ [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
+ [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
+ };
+
+ if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
+ bitrate_attr, rate_policy)) {
+ snprintf(buf, buflen, "failed to parse nested rate attributes!");
+ return;
+ }
+
+ if (rinfo[NL80211_RATE_INFO_BITRATE32])
+ rate = nla_get_u32(rinfo[NL80211_RATE_INFO_BITRATE32]);
+ else if (rinfo[NL80211_RATE_INFO_BITRATE])
+ rate = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
+ if (rate > 0)
+ pos += snprintf(pos, buflen - (pos - buf),
+ "%d.%d MBit/s", rate / 10, rate % 10);
+
+ if (rinfo[NL80211_RATE_INFO_MCS])
+ pos += snprintf(pos, buflen - (pos - buf),
+ " MCS %d", nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]));
+ if (rinfo[NL80211_RATE_INFO_VHT_MCS])
+ pos += snprintf(pos, buflen - (pos - buf),
+ " VHT-MCS %d", nla_get_u8(rinfo[NL80211_RATE_INFO_VHT_MCS]));
+ if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
+ pos += snprintf(pos, buflen - (pos - buf), " 40MHz");
+ if (rinfo[NL80211_RATE_INFO_80_MHZ_WIDTH])
+ pos += snprintf(pos, buflen - (pos - buf), " 80MHz");
+ if (rinfo[NL80211_RATE_INFO_80P80_MHZ_WIDTH])
+ pos += snprintf(pos, buflen - (pos - buf), " 80P80MHz");
+ if (rinfo[NL80211_RATE_INFO_160_MHZ_WIDTH])
+ pos += snprintf(pos, buflen - (pos - buf), " 160MHz");
+ if (rinfo[NL80211_RATE_INFO_SHORT_GI])
+ pos += snprintf(pos, buflen - (pos - buf), " short GI");
+ if (rinfo[NL80211_RATE_INFO_VHT_NSS])
+ pos += snprintf(pos, buflen - (pos - buf),
+ " VHT-NSS %d", nla_get_u8(rinfo[NL80211_RATE_INFO_VHT_NSS]));
+}
+
+/*
+ * INTERFACE COMMANDS
+ */
+void print_ssid_escaped(char *buf, const size_t buflen,
+ const uint8_t *data, const size_t datalen)
+{
+ int i, l;
+
+ memset(buf, '\0', buflen);
+ /* Treat zeroed-out SSIDs separately */
+ for (i = 0; i < datalen && data[i] == '\0'; i++)
+ ;
+ if (i == datalen)
+ return;
+
+ for (i = l= 0; i < datalen; i++) {
+ if (l + 4 >= buflen)
+ return;
+ else if (isprint(data[i]) && data[i] != ' ' && data[i] != '\\')
+ l += sprintf(buf + l, "%c", data[i]);
+ else if (data[i] == ' ' && i != 0 && i != datalen -1)
+ l += sprintf(buf + l, " ");
+ else
+ l += sprintf(buf + l, "\\x%.2x", data[i]);
+ }
+}
+
+/* stolen from iw:interface.c */
+static int iface_handler(struct nl_msg *msg, void *arg)
+{
+ struct iw_nl80211_ifstat *ifs = (struct iw_nl80211_ifstat *)arg;
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
+
+ assert(ifs != NULL);
+
+ nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (tb_msg[NL80211_ATTR_WIPHY])
+ ifs->phy = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY]);
+
+ if (tb_msg[NL80211_ATTR_IFINDEX])
+ ifs->ifindex = nla_get_u32(tb_msg[NL80211_ATTR_IFINDEX]);
+
+ if (tb_msg[NL80211_ATTR_WDEV])
+ ifs->wdev = nla_get_u64(tb_msg[NL80211_ATTR_WDEV]);
+ if (tb_msg[NL80211_ATTR_SSID])
+ print_ssid_escaped(ifs->ssid, sizeof(ifs->ssid),
+ nla_data(tb_msg[NL80211_ATTR_SSID]),
+ nla_len(tb_msg[NL80211_ATTR_SSID]));
+
+ if (tb_msg[NL80211_ATTR_IFTYPE])
+ ifs->iftype = nla_get_u32(tb_msg[NL80211_ATTR_IFTYPE]);
+
+ ifs->chan_width = -1;
+ ifs->chan_type = -1;
+ if (tb_msg[NL80211_ATTR_WIPHY_FREQ]) {
+ ifs->freq = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_FREQ]);
+
+ if (tb_msg[NL80211_ATTR_CHANNEL_WIDTH]) {
+ ifs->chan_width = nla_get_u32(tb_msg[NL80211_ATTR_CHANNEL_WIDTH]);
+
+ if (tb_msg[NL80211_ATTR_CENTER_FREQ1])
+ ifs->freq_ctr1 = nla_get_u32(tb_msg[NL80211_ATTR_CENTER_FREQ1]);
+ if (tb_msg[NL80211_ATTR_CENTER_FREQ2])
+ ifs->freq_ctr2 = nla_get_u32(tb_msg[NL80211_ATTR_CENTER_FREQ2]);
+
+ }
+ if (tb_msg[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
+ ifs->chan_type = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
+ }
+
+ return NL_SKIP;
+}
+
+/**
+ * survey_handler - channel survey data
+ * This handler will be called multiple times, for each channel.
+ * stolen from iw:survey.c
+ */
+static int survey_handler(struct nl_msg *msg, void *arg)
+{
+ struct iw_nl80211_survey *sd = (struct iw_nl80211_survey *)arg;
+ struct nlattr *tb[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
+
+ static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
+ [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
+ [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
+ [NL80211_SURVEY_INFO_IN_USE] = { .type = NLA_FLAG },
+ [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
+ [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
+ [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
+ [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
+ [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
+ [NL80211_SURVEY_INFO_TIME_SCAN] = { .type = NLA_U64 },
+ };
+
+ nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!tb[NL80211_ATTR_SURVEY_INFO])
+ return NL_SKIP;
+
+ if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
+ tb[NL80211_ATTR_SURVEY_INFO], survey_policy))
+ return NL_SKIP;
+
+ /* The frequency is needed to match up with the associated station */
+ if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
+ return NL_SKIP;
+
+ /* We are only interested in the data of the operating channel */
+ if (!sinfo[NL80211_SURVEY_INFO_IN_USE])
+ return NL_SKIP;
+
+ sd->freq = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
+
+ if (sinfo[NL80211_SURVEY_INFO_NOISE])
+ sd->noise = (int8_t)nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
+
+ if (sinfo[NL80211_SURVEY_INFO_TIME])
+ sd->time.active = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
+
+ if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
+ sd->time.busy = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
+
+ if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
+ sd->time.ext_busy = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
+
+ if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
+ sd->time.rx = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
+
+ if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
+ sd->time.tx = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
+
+ if (sinfo[NL80211_SURVEY_INFO_TIME_SCAN])
+ sd->time.scan = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_SCAN]);
+
+ return NL_SKIP;
+}
+
+/* Regulatory domain, stolen from iw:reg.c */
+static int reg_handler(struct nl_msg *msg, void *arg)
+{
+ struct iw_nl80211_reg *ir = (struct iw_nl80211_reg *)arg;
+ struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ char *alpha2;
+
+ ir->region = -1;
+
+ nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!tb_msg[NL80211_ATTR_REG_ALPHA2])
+ return NL_SKIP;
+
+ if (!tb_msg[NL80211_ATTR_REG_RULES])
+ return NL_SKIP;
+
+ if (tb_msg[NL80211_ATTR_DFS_REGION])
+ ir->region = nla_get_u8(tb_msg[NL80211_ATTR_DFS_REGION]);
+ else
+ ir->region = NL80211_DFS_UNSET;
+
+ alpha2 = nla_data(tb_msg[NL80211_ATTR_REG_ALPHA2]);
+ ir->country[0] = alpha2[0];
+ ir->country[1] = alpha2[1];
+
+ return NL_SKIP;
+}
+
+static int link_handler(struct nl_msg *msg, void *arg)
+{
+ struct iw_nl80211_linkstat *ls = arg;
+ struct nlattr *tb[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct nlattr *bss[NL80211_BSS_MAX + 1];
+ static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
+ [NL80211_BSS_TSF] = { .type = NLA_U64 },
+ [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
+ [NL80211_BSS_BSSID] = { },
+ [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
+ [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
+ [NL80211_BSS_INFORMATION_ELEMENTS] = { },
+ [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
+ [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
+ [NL80211_BSS_STATUS] = { .type = NLA_U32 },
+ };
+
+ nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!tb[NL80211_ATTR_BSS])
+ return NL_SKIP;
+
+ if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy))
+ return NL_SKIP;
+
+ if (!bss[NL80211_BSS_BSSID])
+ return NL_SKIP;
+
+ if (!bss[NL80211_BSS_STATUS])
+ return NL_SKIP;
+
+ if (bss[NL80211_BSS_SIGNAL_UNSPEC])
+ ls->bss_signal_qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
+
+ if (bss[NL80211_BSS_SIGNAL_MBM]) {
+ int s = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
+ ls->bss_signal = s / 100;
+ }
+
+ ls->status = nla_get_u32(bss[NL80211_BSS_STATUS]);
+ switch (ls->status) {
+ case NL80211_BSS_STATUS_ASSOCIATED: /* apparently no longer used */
+ case NL80211_BSS_STATUS_AUTHENTICATED:
+ case NL80211_BSS_STATUS_IBSS_JOINED:
+ memcpy(&ls->bssid, nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
+ }
+
+ return NL_SKIP;
+}
+
+static int link_sta_handler(struct nl_msg *msg, void *arg)
+{
+ struct iw_nl80211_linkstat *ls = arg;
+ struct nlattr *tb[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
+ struct nlattr *binfo[NL80211_STA_BSS_PARAM_MAX + 1];
+ struct nl80211_sta_flag_update *sta_flags;
+ static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
+ [NL80211_STA_INFO_CONNECTED_TIME] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
+ [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
+ [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
+ [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
+ [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
+ [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
+ [NL80211_STA_INFO_BEACON_RX] = { .type = NLA_U64 },
+ [NL80211_STA_INFO_BEACON_LOSS] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_BEACON_SIGNAL_AVG] = { .type = NLA_U8 },
+ [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
+ [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
+ [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
+ [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
+ [NL80211_STA_INFO_STA_FLAGS] =
+ { .minlen = sizeof(struct nl80211_sta_flag_update) },
+ [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32},
+ [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32},
+ [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32},
+ [NL80211_STA_INFO_CHAIN_SIGNAL] = { .type = NLA_NESTED },
+ [NL80211_STA_INFO_CHAIN_SIGNAL_AVG] = { .type = NLA_NESTED },
+ };
+ static struct nla_policy bss_policy[NL80211_STA_BSS_PARAM_MAX + 1] = {
+ [NL80211_STA_BSS_PARAM_CTS_PROT] = { .type = NLA_FLAG },
+ [NL80211_STA_BSS_PARAM_SHORT_PREAMBLE] = { .type = NLA_FLAG },
+ [NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME] = { .type = NLA_FLAG },
+ [NL80211_STA_BSS_PARAM_DTIM_PERIOD] = { .type = NLA_U8 },
+ [NL80211_STA_BSS_PARAM_BEACON_INTERVAL] = { .type = NLA_U16 },
+ };
+
+ nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!tb[NL80211_ATTR_STA_INFO])
+ return NL_SKIP;
+
+ if (nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
+ tb[NL80211_ATTR_STA_INFO],
+ stats_policy))
+ return NL_SKIP;
+
+ if (sinfo[NL80211_STA_INFO_TX_RETRIES])
+ ls->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
+ if (sinfo[NL80211_STA_INFO_TX_FAILED])
+ ls->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
+
+
+ if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]) {
+ ls->expected_thru = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
+ /* convert in Mbps but scale by 1000 to save kbps units */
+ ls->expected_thru = ls->expected_thru * 1000 / 1024;
+ }
+ if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
+ ls->inactive_time = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
+ if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
+ ls->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
+
+ if (sinfo[NL80211_STA_INFO_RX_BYTES])
+ ls->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
+ if (sinfo[NL80211_STA_INFO_RX_PACKETS])
+ ls->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
+ if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
+ ls->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
+
+ if (sinfo[NL80211_STA_INFO_TX_BYTES])
+ ls->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
+ if (sinfo[NL80211_STA_INFO_TX_PACKETS])
+ ls->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
+
+ if (sinfo[NL80211_STA_INFO_SIGNAL])
+ ls->signal = (int8_t)nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
+ if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
+ ls->signal_avg = (int8_t)nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
+
+
+ if (sinfo[NL80211_STA_INFO_BEACON_SIGNAL_AVG])
+ ls->beacon_avg_sig = nla_get_u8(sinfo[NL80211_STA_INFO_BEACON_SIGNAL_AVG]);
+ if (sinfo[NL80211_STA_INFO_BEACON_RX])
+ ls->beacons = nla_get_u64(sinfo[NL80211_STA_INFO_BEACON_RX]);
+ if (sinfo[NL80211_STA_INFO_BEACON_LOSS])
+ ls->beacon_loss = nla_get_u32(sinfo[NL80211_STA_INFO_BEACON_LOSS]);
+
+ if (sinfo[NL80211_STA_INFO_TX_BITRATE])
+ parse_bitrate(sinfo[NL80211_STA_INFO_TX_BITRATE], ls->tx_bitrate, sizeof(ls->tx_bitrate));
+
+ if (sinfo[NL80211_STA_INFO_RX_BITRATE])
+ parse_bitrate(sinfo[NL80211_STA_INFO_RX_BITRATE], ls->rx_bitrate, sizeof(ls->rx_bitrate));
+
+ if (sinfo[NL80211_STA_INFO_STA_FLAGS]) {
+ sta_flags = (struct nl80211_sta_flag_update *)
+ nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
+
+ if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
+ sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
+ ls->long_preamble = true;
+
+ if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
+ sta_flags->set & BIT(NL80211_STA_FLAG_WME))
+ ls->wme = true;
+
+ if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
+ sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
+ ls->mfp = true;
+
+ if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
+ sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
+ ls->tdls = true;
+ }
+
+ /* BSS Flags */
+ if (sinfo[NL80211_STA_INFO_BSS_PARAM]) {
+ if (nla_parse_nested(binfo, NL80211_STA_BSS_PARAM_MAX,
+ sinfo[NL80211_STA_INFO_BSS_PARAM],
+ bss_policy) == 0) {
+ if (binfo[NL80211_STA_BSS_PARAM_CTS_PROT]) {
+ ls->cts_protection = true;
+ }
+ if (binfo[NL80211_STA_BSS_PARAM_SHORT_PREAMBLE])
+ ls->long_preamble = false;
+ if (binfo[NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME])
+ ls->short_slot_time = true;
+
+ ls->beacon_int = nla_get_u16(binfo[NL80211_STA_BSS_PARAM_BEACON_INTERVAL]);
+ ls->dtim_period = nla_get_u8(binfo[NL80211_STA_BSS_PARAM_DTIM_PERIOD]);
+ }
+ }
+
+ return NL_SKIP;
+}
+
+/*
+ * COMMAND HANDLERS
+ */
+void iw_nl80211_get_linkstat(struct iw_nl80211_linkstat *ls)
+{
+ static struct cmd cmd_linkstat = {
+ .cmd = NL80211_CMD_GET_SCAN,
+ .flags = NLM_F_DUMP,
+ .handler = link_handler
+ };
+ static struct cmd cmd_getstation = {
+ .cmd = NL80211_CMD_GET_STATION,
+ .flags = 0,
+ .handler = link_sta_handler
+ };
+
+ struct msg_attribute station_addr = {
+ .type = NL80211_ATTR_MAC,
+ .len = sizeof(ls->bssid),
+ .data = &ls->bssid
+ };
+
+ cmd_linkstat.handler_arg = ls;
+ memset(ls, 0, sizeof(*ls));
+ handle_cmd(&cmd_linkstat);
+
+ /* If not associated to another station, the bssid is zeroed out */
+ if (ether_addr_is_zero(&ls->bssid))
+ return;
+ /*
+ * Details of the associated station
+ */
+ cmd_getstation.handler_arg = ls;
+ cmd_getstation.msg_args = &station_addr;
+ cmd_getstation.msg_args_len = 1;
+
+ handle_cmd(&cmd_getstation);
+
+ /* Channel survey data */
+ iw_nl80211_get_survey(&ls->survey);
+}
+
+void iw_nl80211_getreg(struct iw_nl80211_reg *ir)
+{
+ static struct cmd cmd_reg = {
+ .cmd = NL80211_CMD_GET_REG,
+ .flags = 0,
+ .handler = reg_handler
+ };
+
+ cmd_reg.handler_arg = ir;
+ memset(ir, 0, sizeof(*ir));
+ handle_cmd(&cmd_reg);
+}
+
+void iw_nl80211_getifstat(struct iw_nl80211_ifstat *ifs)
+{
+ static struct cmd cmd_ifstat = {
+ .cmd = NL80211_CMD_GET_INTERFACE,
+ .flags = 0,
+ .handler = iface_handler
+ };
+
+ cmd_ifstat.handler_arg = ifs;
+ memset(ifs, 0, sizeof(*ifs));
+ handle_cmd(&cmd_ifstat);
+}
+
+void iw_nl80211_get_survey(struct iw_nl80211_survey *sd)
+{
+ static struct cmd cmd_survey = {
+ .cmd = NL80211_CMD_GET_SURVEY,
+ .flags = NLM_F_DUMP,
+ .handler = survey_handler
+ };
+
+ cmd_survey.handler_arg = sd;
+ memset(sd, 0, sizeof(*sd));
+ handle_cmd(&cmd_survey);
+}
+
+/*
+ * Multicast Handling
+ */
+/**
+ * struct handler_args - arguments to resolve multicast group
+ * @group: group name to resolve
+ * @id: ID it resolves into
+ */
+struct handler_args {
+ const char *group;
+ int id;
+};
+
+/* stolen from iw:genl.c */
+static int family_handler(struct nl_msg *msg, void *arg)
+{
+ struct handler_args *grp = arg;
+ struct nlattr *tb[CTRL_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct nlattr *mcgrp;
+ int rem_mcgrp;
+
+ nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!tb[CTRL_ATTR_MCAST_GROUPS])
+ return NL_SKIP;
+
+ nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], rem_mcgrp) {
+ struct nlattr *tb_mcgrp[CTRL_ATTR_MCAST_GRP_MAX + 1];
+
+ nla_parse(tb_mcgrp, CTRL_ATTR_MCAST_GRP_MAX,
+ nla_data(mcgrp), nla_len(mcgrp), NULL);
+
+ if (!tb_mcgrp[CTRL_ATTR_MCAST_GRP_NAME] ||
+ !tb_mcgrp[CTRL_ATTR_MCAST_GRP_ID])
+ continue;
+ if (strncmp(nla_data(tb_mcgrp[CTRL_ATTR_MCAST_GRP_NAME]),
+ grp->group, nla_len(tb_mcgrp[CTRL_ATTR_MCAST_GRP_NAME])))
+ continue;
+ grp->id = nla_get_u32(tb_mcgrp[CTRL_ATTR_MCAST_GRP_ID]);
+ break;
+ }
+
+ return NL_SKIP;
+}
+
+/* stolen from iw:genl.c */
+int nl_get_multicast_id(struct nl_sock *sock, const char *family, const char *group)
+{
+ struct nl_msg *msg;
+ struct nl_cb *cb;
+ int ret, ctrlid;
+ struct handler_args grp = {
+ .group = group,
+ .id = -ENOENT,
+ };
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -ENOMEM;
+
+ cb = nl_cb_alloc(NL_CB_DEFAULT);
+ if (!cb) {
+ ret = -ENOMEM;
+ goto out_fail_cb;
+ }
+
+ ctrlid = genl_ctrl_resolve(sock, "nlctrl");
+
+ genlmsg_put(msg, 0, 0, ctrlid, 0,
+ 0, CTRL_CMD_GETFAMILY, 0);
+
+ ret = -ENOBUFS;
+ NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
+
+ ret = nl_send_auto_complete(sock, msg);
+ if (ret < 0)
+ goto out;
+
+ ret = 1;
+
+ nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &ret);
+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &ret);
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, family_handler, &grp);
+
+ while (ret > 0)
+ nl_recvmsgs(sock, cb);
+
+ if (ret == 0)
+ ret = grp.id;
+nla_put_failure:
+out:
+ nl_cb_put(cb);
+out_fail_cb:
+ nlmsg_free(msg);
+ return ret;
+}
+
+/**
+ * Allocate a GeNetlink socket ready to listen for nl80211 multicast group @grp
+ * @grp: identifier of an nl80211 multicast group (e.g. "scan")
+ */
+struct nl_sock *alloc_nl_mcast_sk(const char *grp)
+{
+ int mcid, ret;
+ struct nl_sock *sk = nl_socket_alloc();
+
+ if (!sk)
+ err_sys("failed to allocate netlink multicast socket");
+
+ if (genl_connect(sk))
+ err_sys("failed to connect multicast socket to GeNetlink");
+
+ mcid = nl_get_multicast_id(sk, "nl80211", grp);
+ if (mcid < 0)
+ err_quit("failed to resolve nl80211 '%s' multicast group", grp);
+
+ ret = nl_socket_add_membership(sk, mcid);
+ if (ret)
+ err_sys("failed to join nl80211 multicast group %s", grp);
+
+ return sk;
+}