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monitor: Add support for nested array attributes

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This commit is contained in:
Marcel Holtmann 2014-08-06 04:46:01 +02:00
parent d5989e62ed
commit 19bdbc3c2d
1 changed files with 62 additions and 3 deletions
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65
monitor/nlmon.c
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@ -117,6 +117,7 @@ enum attr_type {
ATTR_ADDRESS, ATTR_ADDRESS,
ATTR_BINARY, ATTR_BINARY,
ATTR_NESTED, ATTR_NESTED,
ATTR_ARRAY,
}; };
struct attr_entry { struct attr_entry {
@ -125,6 +126,7 @@ struct attr_entry {
enum attr_type type; enum attr_type type;
union { union {
const struct attr_entry *nested; const struct attr_entry *nested;
enum attr_type array_type;
void (*func) (void); void (*func) (void);
}; };
}; };
@ -259,9 +261,11 @@ static const struct attr_entry attr_table[] = {
{ NL80211_ATTR_MAX_NUM_SCAN_SSIDS, { NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
"Max Number Scan SSIDs", ATTR_U8 }, "Max Number Scan SSIDs", ATTR_U8 },
{ NL80211_ATTR_SCAN_FREQUENCIES, { NL80211_ATTR_SCAN_FREQUENCIES,
"Scan Frequencies" }, "Scan Frequencies", ATTR_ARRAY,
{ .array_type = ATTR_U32 } },
{ NL80211_ATTR_SCAN_SSIDS, { NL80211_ATTR_SCAN_SSIDS,
"Scan SSIDs" }, "Scan SSIDs", ATTR_ARRAY,
{ .array_type = ATTR_BINARY } },
{ NL80211_ATTR_GENERATION, { NL80211_ATTR_GENERATION,
"Generation", ATTR_U32 }, "Generation", ATTR_U32 },
{ NL80211_ATTR_BSS, { NL80211_ATTR_BSS,
@ -271,7 +275,8 @@ static const struct attr_entry attr_table[] = {
{ NL80211_ATTR_REG_TYPE, { NL80211_ATTR_REG_TYPE,
"Regulatory Type" }, "Regulatory Type" },
{ NL80211_ATTR_SUPPORTED_COMMANDS, { NL80211_ATTR_SUPPORTED_COMMANDS,
"Supported Commands" }, "Supported Commands", ATTR_ARRAY,
{ .array_type = ATTR_U32 } },
{ NL80211_ATTR_FRAME, { NL80211_ATTR_FRAME,
"Frame", ATTR_BINARY }, "Frame", ATTR_BINARY },
{ NL80211_ATTR_SSID, { NL80211_ATTR_SSID,
@ -599,6 +604,49 @@ static const struct attr_entry attr_table[] = {
#define NLA_DATA(nla) ((void*)(((char*)(nla)) + NLA_LENGTH(0))) #define NLA_DATA(nla) ((void*)(((char*)(nla)) + NLA_LENGTH(0)))
#define NLA_PAYLOAD(nla) ((int)((nla)->nla_len - NLA_LENGTH(0))) #define NLA_PAYLOAD(nla) ((int)((nla)->nla_len - NLA_LENGTH(0)))
static void print_value(int indent, const char *label, enum attr_type type,
const void *buf, uint32_t len)
{
uint16_t val_u16;
uint32_t val_u32;
switch (type) {
case ATTR_U16:
val_u16 = *((uint16_t *) buf);
printf("%*c%s: %u (0x%04x)\n", indent, ' ',
label, val_u16, val_u16);
if (len != 2)
printf("malformed packet\n");
break;
case ATTR_U32:
val_u32 = *((uint32_t *) buf);
printf("%*c%s: %u (0x%08x)\n", indent, ' ',
label, val_u32, val_u32);
if (len != 4)
printf("malformed packet\n");
break;
default:
printf("%*c%s: len %u\n", indent, ' ', label, len);
print_hexdump(buf, len);
break;
}
}
static void print_array(int indent, enum attr_type type,
const void *buf, uint32_t len)
{
const struct nlattr *nla;
for (nla = buf ; NLA_OK(nla, len); nla = NLA_NEXT(nla, len)) {
uint16_t nla_type = nla->nla_type & NLA_TYPE_MASK;
char str[8];
snprintf(str, sizeof(str), "%u", nla_type);
print_value(indent, str, type,
NLA_DATA(nla), NLA_PAYLOAD(nla));
}
}
static void print_attributes(int indent, const struct attr_entry *table, static void print_attributes(int indent, const struct attr_entry *table,
const void *buf, uint32_t len) const void *buf, uint32_t len)
{ {
@ -609,6 +657,7 @@ static void print_attributes(int indent, const struct attr_entry *table,
for (nla = buf ; NLA_OK(nla, len); nla = NLA_NEXT(nla, len)) { for (nla = buf ; NLA_OK(nla, len); nla = NLA_NEXT(nla, len)) {
uint16_t nla_type = nla->nla_type & NLA_TYPE_MASK; uint16_t nla_type = nla->nla_type & NLA_TYPE_MASK;
enum attr_type type; enum attr_type type;
enum attr_type array_type;
const struct attr_entry *nested; const struct attr_entry *nested;
uint64_t val64; uint64_t val64;
uint32_t val32; uint32_t val32;
@ -620,6 +669,7 @@ static void print_attributes(int indent, const struct attr_entry *table,
str = "Reserved"; str = "Reserved";
type = ATTR_UNSPEC; type = ATTR_UNSPEC;
array_type = ATTR_UNSPEC;
nested = NULL; nested = NULL;
if (table) { if (table) {
@ -628,6 +678,7 @@ static void print_attributes(int indent, const struct attr_entry *table,
str = table[i].str; str = table[i].str;
type = table[i].type; type = table[i].type;
nested = table[i].nested; nested = table[i].nested;
array_type = table[i].array_type;
break; break;
} }
} }
@ -705,6 +756,14 @@ static void print_attributes(int indent, const struct attr_entry *table,
print_attributes(indent + 4, nested, print_attributes(indent + 4, nested,
NLA_DATA(nla), NLA_PAYLOAD(nla)); NLA_DATA(nla), NLA_PAYLOAD(nla));
break; break;
case ATTR_ARRAY:
printf("%*c%s: len %u\n", indent, ' ', str,
NLA_PAYLOAD(nla));
if (array_type == ATTR_UNSPEC)
printf("missing type\n");
print_array(indent + 4, array_type,
NLA_DATA(nla), NLA_PAYLOAD(nla));
break;
} }
} }
} }