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/*
* Copyright (c) 2022 The Android Open Source Project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include "pmsr.h"
#include <errno.h>
#include <stdio.h>
static int parse_pmsr_request_ftm(struct nlattr *req,
struct pmsr_request_ftm *out)
{
struct nlattr *tb[NL80211_PMSR_FTM_REQ_ATTR_MAX + 1];
nla_parse_nested(tb, NL80211_PMSR_FTM_REQ_ATTR_MAX, req, NULL);
if (tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE])
out->preamble =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]);
if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD])
out->burst_period =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD]);
out->asap = !!tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP];
if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP])
out->num_bursts_exp =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP]);
if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION])
out->burst_duration =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION]);
if (tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST])
out->ftms_per_burst =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST]);
if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES])
out->ftmr_retries =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES]);
out->request_lci = !!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI];
out->request_civicloc =
!!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC];
out->trigger_based =
!!tb[NL80211_PMSR_FTM_REQ_ATTR_TRIGGER_BASED];
out->non_trigger_based =
!!tb[NL80211_PMSR_FTM_REQ_ATTR_NON_TRIGGER_BASED];
out->lmr_feedback =
!!tb[NL80211_PMSR_FTM_REQ_ATTR_LMR_FEEDBACK];
if (tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR])
out->bss_color =
nla_get_u8(tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR]);
return 0;
}
int parse_pmsr_channel(struct nlattr *req,
struct pmsr_channel *out)
{
struct nlattr *nla;
int rem;
if (!req)
return -EINVAL;
nla_for_each_attr(nla, req, nla_len(req), rem) {
switch (nla_type(nla)) {
case NL80211_ATTR_WIPHY_FREQ:
out->center_freq = nla_get_u32(nla);
break;
case NL80211_ATTR_WIPHY_FREQ_OFFSET:
out->freq_offset = nla_get_u32(nla);
break;
case NL80211_ATTR_WIPHY_CHANNEL_TYPE:
out->channel_type = nla_get_u32(nla);
break;
case NL80211_ATTR_CHANNEL_WIDTH:
out->width = nla_get_u32(nla);
break;
case NL80211_ATTR_CENTER_FREQ1:
out->center_freq1 = nla_get_u32(nla);
break;
case NL80211_ATTR_CENTER_FREQ2:
out->center_freq2 = nla_get_u32(nla);
break;
default:
printf("%s: unknown attributes\n", __func__);
}
}
return 0;
}
static int parse_pmsr_request_peer(struct nlattr *req,
struct pmsr_request_peer *out)
{
struct nlattr *tb[NL80211_PMSR_PEER_ATTR_MAX + 1];
struct nlattr *tb_req[NL80211_PMSR_REQ_ATTR_MAX + 1];
struct nlattr *nla;
int err, rem;
if (!req)
return EINVAL;
err = nla_parse_nested(tb, NL80211_PMSR_PEER_ATTR_MAX,
req, NULL);
if (err) {
printf("%s: Failed to parse PMSR peer\n", __func__);
return err;
}
if (!tb[NL80211_PMSR_PEER_ATTR_ADDR]) {
printf("%s: Failed to parse PMSR peer. Missing peer address\n", __func__);
return -EINVAL;
}
memcpy(out->addr, nla_data(tb[NL80211_PMSR_PEER_ATTR_ADDR]), ETH_ALEN);
err = parse_pmsr_channel(tb[NL80211_PMSR_PEER_ATTR_CHAN],
&out->channel);
if (err)
return err;
err = nla_parse_nested(tb_req, NL80211_PMSR_REQ_ATTR_MAX,
tb[NL80211_PMSR_PEER_ATTR_REQ], NULL);
if (err)
return err;
if (tb_req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF])
out->report_ap_tsf = true;
if (!tb_req[NL80211_PMSR_REQ_ATTR_DATA]) {
printf("%s: missing NL80211_PMSR_REQ_ATTR_DATA\n", __func__);
return -EINVAL;
}
nla_for_each_nested(nla, tb_req[NL80211_PMSR_REQ_ATTR_DATA], rem) {
switch (nla_type(nla)) {
case NL80211_PMSR_TYPE_FTM:
err = parse_pmsr_request_ftm(nla, &out->ftm);
if (err)
return err;
break;
default:
printf("%s: unsupported measurement type\n", __func__);
return -EINVAL;
}
}
return 0;
}
int parse_pmsr_request(struct nlattr *req,
struct pmsr_request *out)
{
struct nlattr *nla;
struct pmsr_request_peer *peer, *tmp;
int rem;
int err = 0;
if (!req)
return -EINVAL;
INIT_LIST_HEAD(&out->peers);
out->n_peers = 0;
req = nla_find(nla_data(req), nla_len(req), NL80211_ATTR_PEER_MEASUREMENTS);
nla_for_each_nested(nla, req, rem) {
switch (nla_type(nla)) {
case NL80211_ATTR_TIMEOUT:
out->timeout = nla_get_u32(nla);
break;
case NL80211_ATTR_MAC:
memcpy(out->mac_addr, nla_data(nla), ETH_ALEN);
break;
case NL80211_ATTR_MAC_MASK:
memcpy(out->mac_addr_mask, nla_data(nla), ETH_ALEN);
break;
case NL80211_PMSR_ATTR_PEERS:
peer = calloc(1, sizeof(struct pmsr_request_peer));
list_add(&peer->list, &out->peers);
err = parse_pmsr_request_peer(nla, peer);
if (err)
goto out_err;
out->n_peers++;
break;
}
}
out_err:
if (err)
list_for_each_entry_safe(peer, tmp, &out->peers, list) {
list_del(&peer->list);
free(peer);
}
return err;
}
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