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monitor: Add initial support for nested attribute decoding

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This commit is contained in:
Marcel Holtmann 2014-08-03 22:07:07 +02:00
parent dfcb1ddbc1
commit 81118dfc1f
1 changed files with 56 additions and 14 deletions
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70
monitor/nlmon.c
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@ -115,12 +115,42 @@ enum attr_type {
ATTR_STRING, ATTR_STRING,
ATTR_ADDRESS, ATTR_ADDRESS,
ATTR_BINARY, ATTR_BINARY,
ATTR_NESTED,
}; };
struct attr_entry { struct attr_entry {
uint16_t attr; uint16_t attr;
const char *str; const char *str;
enum attr_type type; enum attr_type type;
union {
const struct attr_entry *nested;
void (*func) (void);
};
};
static const struct attr_entry iftype_table[] = {
{ NL80211_IFTYPE_ADHOC, "Ad-hoc", ATTR_FLAG },
{ NL80211_IFTYPE_STATION, "Station", ATTR_FLAG },
{ NL80211_IFTYPE_AP, "AP", ATTR_FLAG },
{ NL80211_IFTYPE_AP_VLAN, "AP-VLAN", ATTR_FLAG },
{ NL80211_IFTYPE_WDS, "WDS", ATTR_FLAG },
{ NL80211_IFTYPE_MONITOR, "Monitor", ATTR_FLAG },
{ NL80211_IFTYPE_MESH_POINT, "Mesh-point", ATTR_FLAG },
{ NL80211_IFTYPE_P2P_CLIENT, "P2P-Client", ATTR_FLAG },
{ NL80211_IFTYPE_P2P_GO, "P2P-GO", ATTR_FLAG },
{ NL80211_IFTYPE_P2P_DEVICE, "P2P-Device", ATTR_FLAG },
{ }
};
static const struct attr_entry sta_flag_table[] = {
{ NL80211_STA_FLAG_AUTHORIZED, "Authorized", ATTR_FLAG },
{ NL80211_STA_FLAG_SHORT_PREAMBLE, "ShortPreamble",ATTR_FLAG },
{ NL80211_STA_FLAG_WME, "WME", ATTR_FLAG },
{ NL80211_STA_FLAG_MFP, "MFP", ATTR_FLAG },
{ NL80211_STA_FLAG_AUTHENTICATED, "Authenticated",ATTR_FLAG },
{ NL80211_STA_FLAG_TDLS_PEER, "TDLS-Peer", ATTR_FLAG },
{ NL80211_STA_FLAG_ASSOCIATED, "Associated", ATTR_FLAG },
{ }
}; };
static const struct attr_entry attr_table[] = { static const struct attr_entry attr_table[] = {
@ -157,7 +187,7 @@ static const struct attr_entry attr_table[] = {
{ NL80211_ATTR_STA_AID, { NL80211_ATTR_STA_AID,
"Station AID", ATTR_U16 }, "Station AID", ATTR_U16 },
{ NL80211_ATTR_STA_FLAGS, { NL80211_ATTR_STA_FLAGS,
"Station Flags" }, "Station Flags", ATTR_NESTED, { sta_flag_table } },
{ NL80211_ATTR_STA_LISTEN_INTERVAL, { NL80211_ATTR_STA_LISTEN_INTERVAL,
"Station Listen Interval", ATTR_U16 }, "Station Listen Interval", ATTR_U16 },
{ NL80211_ATTR_STA_SUPPORTED_RATES, { NL80211_ATTR_STA_SUPPORTED_RATES,
@ -187,7 +217,8 @@ static const struct attr_entry attr_table[] = {
{ NL80211_ATTR_HT_CAPABILITY, { NL80211_ATTR_HT_CAPABILITY,
"HT Capability" }, "HT Capability" },
{ NL80211_ATTR_SUPPORTED_IFTYPES, { NL80211_ATTR_SUPPORTED_IFTYPES,
"Supported Interface Types" }, "Supported Interface Types", ATTR_NESTED,
{ iftype_table } },
{ NL80211_ATTR_REG_ALPHA2, { NL80211_ATTR_REG_ALPHA2,
"Regulatory Alpha2", ATTR_STRING }, "Regulatory Alpha2", ATTR_STRING },
{ NL80211_ATTR_REG_RULES, { NL80211_ATTR_REG_RULES,
@ -365,7 +396,8 @@ static const struct attr_entry attr_table[] = {
{ NL80211_ATTR_INTERFACE_COMBINATIONS, { NL80211_ATTR_INTERFACE_COMBINATIONS,
"Interface Combinations" }, "Interface Combinations" },
{ NL80211_ATTR_SOFTWARE_IFTYPES, { NL80211_ATTR_SOFTWARE_IFTYPES,
"Software Interface Types" }, "Software Interface Types", ATTR_NESTED,
{ iftype_table } },
{ NL80211_ATTR_REKEY_DATA, { NL80211_ATTR_REKEY_DATA,
"Rekey Data" }, "Rekey Data" },
{ NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS, { NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
@ -550,7 +582,8 @@ 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_attributes(int indent, const void *buf, uint32_t len) static void print_attributes(int indent, const struct attr_entry *table,
const void *buf, uint32_t len)
{ {
const struct nlattr *nla; const struct nlattr *nla;
const char *str; const char *str;
@ -559,6 +592,7 @@ static void print_attributes(int indent, const void *buf, uint32_t len)
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;
const struct attr_entry *nested;
uint64_t val64; uint64_t val64;
uint32_t val32; uint32_t val32;
uint16_t val16; uint16_t val16;
@ -566,12 +600,16 @@ static void print_attributes(int indent, const void *buf, uint32_t len)
str = "Reserved"; str = "Reserved";
type = ATTR_UNSPEC; type = ATTR_UNSPEC;
nested = NULL;
for (i = 0; attr_table[i].str; i++) { if (table) {
if (nla_type == attr_table[i].attr) { for (i = 0; table[i].str; i++) {
str = attr_table[i].str; if (nla_type == table[i].attr) {
type = attr_table[i].type; str = table[i].str;
break; type = table[i].type;
nested = table[i].nested;
break;
}
} }
} }
@ -630,11 +668,15 @@ static void print_attributes(int indent, const void *buf, uint32_t len)
NLA_PAYLOAD(nla)); NLA_PAYLOAD(nla));
print_hexdump(NLA_DATA(nla), NLA_PAYLOAD(nla)); print_hexdump(NLA_DATA(nla), NLA_PAYLOAD(nla));
break; break;
case ATTR_NESTED:
printf("%*c%s: len %u\n", indent, ' ', str,
NLA_PAYLOAD(nla));
if (!nested)
printf("missing table\n");
print_attributes(indent + 4, nested,
NLA_DATA(nla), NLA_PAYLOAD(nla));
break;
} }
if (nla->nla_type & NLA_F_NESTED)
print_attributes(indent + 2, NLA_DATA(nla),
NLA_PAYLOAD(nla));
} }
} }
@ -805,7 +847,7 @@ static void print_message(const struct nlmsghdr *nlmsg)
nlmsg->nlmsg_flags, nlmsg->nlmsg_flags,
NLMSG_PAYLOAD(nlmsg, 0)); NLMSG_PAYLOAD(nlmsg, 0));
print_attributes(4, NLMSG_DATA(nlmsg) + GENL_HDRLEN, print_attributes(4, attr_table, NLMSG_DATA(nlmsg) + GENL_HDRLEN,
NLMSG_PAYLOAD(nlmsg, GENL_HDRLEN)); NLMSG_PAYLOAD(nlmsg, GENL_HDRLEN));
} }