Kernel/iwd
3
0
Fork 0
mirror of https://git.kernel.org/pub/scm/network/wireless/iwd.git synced 2024-11-22 14:49:24 +01:00
Code Releases Activity

monitor: Support arbitrarily long bitfields

Browse Source 
Support arbitrarily long bitfields by providing field and mask values
as arrays with their length measured in bytes. Some of the IE fields
easily reach 80 bits or more, thus easily overrunning any integer sizes
used by the OS architecture.
This commit is contained in:
Patrik Flykt 2015-03-06 13:36:43 +02:00 committed by Denis Kenzior
parent 1637f3519a
commit 6d652fb743
1 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
monitor/nlmon.c
View File

@ -681,12 +681,16 @@ static const char *rsn_capabilities_bitfield[] = {
};
static void print_ie_bitfield(unsigned int level, const char *label,
uint64_t bits, const char *bitfield_table[])
const uint8_t *bytes, const uint8_t *mask, size_t len,
const char *bitfield_table[])
{
unsigned int i;
for (i = 0; bitfield_table[i]; i++) {
if (!(bits & 1 << i))
for (i = 0; i < len * 8; i++) {
uint8_t byte = i / 8;
uint8_t bit = i % 8;
if (!util_is_bit_set(bytes[byte] & mask[byte], bit))
continue;
print_attr(level, "%s: bit %2d: %s", label, i,
@ -699,7 +703,8 @@ static void print_ie_rsn(unsigned int level, const char *label,
{
const void *end = data + size;
uint16_t version, count, rsn_capa;
uint16_t version, count;
uint8_t bytemask[2];
int i;
const char *rsn_capabilities_replay_counter[] = {
"1 replay counter",
@ -760,22 +765,25 @@ static void print_ie_rsn(unsigned int level, const char *label,
if (end - data < 2)
goto end;
rsn_capa = l_get_le16(data);
data += 2;
print_ie_bitfield(level + 1, "RSN capabilities", rsn_capa & 0x0003,
rsn_capabilities_bitfield);
bytemask[0] = 0x03;
bytemask[1] = 0x00;
print_ie_bitfield(level + 1, "RSN capabilities", data, bytemask,
sizeof(bytemask), rsn_capabilities_bitfield);
count = (rsn_capa & 0x000c) >> 2;
count = (*((uint8_t *)data) & 0x0c) >> 2;
print_attr(level + 1, "RSN capabilities: bits 3 - 4: %s per PTKSA",
rsn_capabilities_replay_counter[count]);
count = (rsn_capa & 0x0030) >> 4;
count = (*((uint8_t *)data) & 0x30) >> 4;
print_attr(level + 1, "RSN capabilities: bits 5 - 6: %s per GTKSA",
rsn_capabilities_replay_counter[count]);
print_ie_bitfield(level + 1, "RSN capabilities", rsn_capa & 0xffc0,
rsn_capabilities_bitfield);
bytemask[0] = 0xc0;
bytemask[1] = 0xff;
print_ie_bitfield(level + 1, "RSN capabilities", data, bytemask,
sizeof(bytemask), rsn_capabilities_bitfield);
if (end - data < 2)
goto end;