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nl80211util: add nl80211_parse_supported_frequencies

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A helper function to parse supported and disabled frequencies.
This commit is contained in:
James Prestwood 2022-08-03 14:36:34 -07:00 committed by Denis Kenzior
parent 27d8cf4ccc
commit 907a2fd7b9
2 changed files with 48 additions and 0 deletions
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44
src/nl80211util.c
View File

@ -32,6 +32,7 @@
#include "src/nl80211util.h"
#include "src/band.h"
#include "src/util.h"
typedef bool (*attr_handler)(const void *data, uint16_t len, void *o);
@ -484,3 +485,46 @@ int nl80211_parse_chandef(struct l_genl_msg *msg, struct band_chandef *out)
memcpy(out, &t, sizeof(t));
return 0;
}
int nl80211_parse_supported_frequencies(struct l_genl_attr *band_freqs,
struct scan_freq_set *supported_list,
struct scan_freq_set *disabled_list)
{
uint16_t type, len;
const void *data;
struct l_genl_attr attr;
struct l_genl_attr nested;
if (!l_genl_attr_recurse(band_freqs, &nested))
return -EBADMSG;
while (l_genl_attr_next(&nested, NULL, NULL, NULL)) {
uint32_t freq = 0;
bool disabled = false;
if (!l_genl_attr_recurse(&nested, &attr))
continue;
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case NL80211_FREQUENCY_ATTR_FREQ:
freq = *((uint32_t *) data);
break;
case NL80211_FREQUENCY_ATTR_DISABLED:
disabled = true;
break;
}
}
if (!freq)
continue;
if (supported_list)
scan_freq_set_add(supported_list, freq);
if (disabled && disabled_list)
scan_freq_set_add(disabled_list, freq);
}
return 0;
}

4
src/nl80211util.h
View File

@ -23,6 +23,7 @@
#include <ell/ell.h>
struct band_chandef;
struct scan_freq_set;
int nl80211_parse_attrs(struct l_genl_msg *msg, int tag, ...);
@ -55,3 +56,6 @@ struct l_genl_msg *nl80211_build_cmd_frame(uint32_t ifindex,
size_t iov_len);
int nl80211_parse_chandef(struct l_genl_msg *msg, struct band_chandef *out);
int nl80211_parse_supported_frequencies(struct l_genl_attr *band_freqs,
struct scan_freq_set *supported,
struct scan_freq_set *disabled);