static int
print_radiotap_field(netdissect_options *ndo,
- struct cpack_state *s, uint32_t bit, uint8_t *flags,
+ struct cpack_state *s, uint32_t bit, uint8_t *flagsp,
uint32_t presentflags)
{
- union {
- int8_t i8;
- uint8_t u8;
- int16_t i16;
- uint16_t u16;
- uint32_t u32;
- uint64_t u64;
- } u, u2, u3, u4, u5, u6;
- uint8_t mcs_nss[4];
u_int i;
int rc;
switch (bit) {
- case IEEE80211_RADIOTAP_FLAGS:
- rc = cpack_uint8(s, &u.u8);
- if (rc != 0)
- break;
- *flags = u.u8;
- break;
- case IEEE80211_RADIOTAP_RATE:
- rc = cpack_uint8(s, &u.u8);
- break;
- case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
- case IEEE80211_RADIOTAP_DB_ANTNOISE:
- case IEEE80211_RADIOTAP_ANTENNA:
- rc = cpack_uint8(s, &u.u8);
- break;
- case IEEE80211_RADIOTAP_DBM_ANTSIGNAL:
- case IEEE80211_RADIOTAP_DBM_ANTNOISE:
- rc = cpack_int8(s, &u.i8);
- break;
- case IEEE80211_RADIOTAP_CHANNEL:
- rc = cpack_uint16(s, &u.u16);
- if (rc != 0)
- break;
- rc = cpack_uint16(s, &u2.u16);
- break;
- case IEEE80211_RADIOTAP_FHSS:
- case IEEE80211_RADIOTAP_LOCK_QUALITY:
- case IEEE80211_RADIOTAP_TX_ATTENUATION:
- case IEEE80211_RADIOTAP_RX_FLAGS:
- rc = cpack_uint16(s, &u.u16);
- break;
- case IEEE80211_RADIOTAP_DB_TX_ATTENUATION:
- rc = cpack_uint8(s, &u.u8);
- break;
- case IEEE80211_RADIOTAP_DBM_TX_POWER:
- rc = cpack_int8(s, &u.i8);
- break;
- case IEEE80211_RADIOTAP_TSFT:
- rc = cpack_uint64(s, &u.u64);
- break;
- case IEEE80211_RADIOTAP_XCHANNEL:
- rc = cpack_uint32(s, &u.u32);
- if (rc != 0)
- break;
- rc = cpack_uint16(s, &u2.u16);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u3.u8);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u4.u8);
- break;
- case IEEE80211_RADIOTAP_MCS:
- rc = cpack_uint8(s, &u.u8);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u2.u8);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u3.u8);
- break;
- case IEEE80211_RADIOTAP_AMPDU_STATUS:
- rc = cpack_uint32(s, &u.u32);
- if (rc != 0)
- break;
- rc = cpack_uint16(s, &u2.u16);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u3.u8);
+
+ case IEEE80211_RADIOTAP_TSFT: {
+ uint64_t tsft;
+
+ rc = cpack_uint64(s, &tsft);
if (rc != 0)
- break;
- rc = cpack_uint8(s, &u4.u8);
+ goto trunc;
+ ND_PRINT((ndo, "%" PRIu64 "us tsft ", tsft));
break;
- case IEEE80211_RADIOTAP_VHT:
- rc = cpack_uint16(s, &u.u16);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u2.u8);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u3.u8);
- if (rc != 0)
- goto fail;
- for (i = 0; i < 4; i++) {
- rc = cpack_uint8(s, &mcs_nss[i]);
- if (rc != 0)
- goto fail;
}
- rc = cpack_uint8(s, &u4.u8);
- if (rc != 0)
- break;
- rc = cpack_uint8(s, &u5.u8);
+
+ case IEEE80211_RADIOTAP_FLAGS: {
+ uint8_t flagsval;
+
+ rc = cpack_uint8(s, &flagsval);
if (rc != 0)
- goto fail;
- rc = cpack_uint16(s, &u6.u16);
- fail:
+ goto trunc;
+ *flagsp = flagsval;
+ if (flagsval & IEEE80211_RADIOTAP_F_CFP)
+ ND_PRINT((ndo, "cfp "));
+ if (flagsval & IEEE80211_RADIOTAP_F_SHORTPRE)
+ ND_PRINT((ndo, "short preamble "));
+ if (flagsval & IEEE80211_RADIOTAP_F_WEP)
+ ND_PRINT((ndo, "wep "));
+ if (flagsval & IEEE80211_RADIOTAP_F_FRAG)
+ ND_PRINT((ndo, "fragmented "));
+ if (flagsval & IEEE80211_RADIOTAP_F_BADFCS)
+ ND_PRINT((ndo, "bad-fcs "));
break;
- default:
- /* this bit indicates a field whose
- * size we do not know, so we cannot
- * proceed. Just print the bit number.
- */
- ND_PRINT((ndo, "[bit %u] ", bit));
- return -1;
- }
+ }
- if (rc != 0) {
- ND_PRINT((ndo, "%s", tstr));
- return rc;
- }
+ case IEEE80211_RADIOTAP_RATE: {
+ uint8_t rate;
- switch (bit) {
- case IEEE80211_RADIOTAP_CHANNEL:
- /*
- * If CHANNEL and XCHANNEL are both present, skip
- * CHANNEL.
- */
- if (presentflags & (1 << IEEE80211_RADIOTAP_XCHANNEL))
- break;
- print_chaninfo(ndo, u.u16, u2.u16, presentflags);
- break;
- case IEEE80211_RADIOTAP_FHSS:
- ND_PRINT((ndo, "fhset %d fhpat %d ", u.u16 & 0xff, (u.u16 >> 8) & 0xff));
- break;
- case IEEE80211_RADIOTAP_RATE:
+ rc = cpack_uint8(s, &rate);
+ if (rc != 0)
+ goto trunc;
/*
* XXX On FreeBSD rate & 0x80 means we have an MCS. On
* Linux and AirPcap it does not. (What about
* setting. Such rates do exist, e.g. 11n
* MCS 7 at 20 MHz with a long guard interval.
*/
- if (u.u8 >= 0x80 && u.u8 <= 0x8f) {
+ if (rate >= 0x80 && rate <= 0x8f) {
/*
* XXX - we don't know the channel width
* or guard interval length, so we can't
* information from Flags, at least on
* FreeBSD?
*/
- ND_PRINT((ndo, "MCS %u ", u.u8 & 0x7f));
+ ND_PRINT((ndo, "MCS %u ", rate & 0x7f));
} else
- ND_PRINT((ndo, "%2.1f Mb/s ", .5 * u.u8));
+ ND_PRINT((ndo, "%2.1f Mb/s ", .5 * rate));
break;
- case IEEE80211_RADIOTAP_DBM_ANTSIGNAL:
- ND_PRINT((ndo, "%ddBm signal ", u.i8));
+ }
+
+ case IEEE80211_RADIOTAP_CHANNEL: {
+ uint16_t frequency;
+ uint16_t flags;
+
+ rc = cpack_uint16(s, &frequency);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint16(s, &flags);
+ if (rc != 0)
+ goto trunc;
+ /*
+ * If CHANNEL and XCHANNEL are both present, skip
+ * CHANNEL.
+ */
+ if (presentflags & (1 << IEEE80211_RADIOTAP_XCHANNEL))
+ break;
+ print_chaninfo(ndo, frequency, flags, presentflags);
break;
- case IEEE80211_RADIOTAP_DBM_ANTNOISE:
- ND_PRINT((ndo, "%ddBm noise ", u.i8));
+ }
+
+ case IEEE80211_RADIOTAP_FHSS: {
+ uint8_t hopset;
+ uint8_t hoppat;
+
+ rc = cpack_uint8(s, &hopset);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &hoppat);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "fhset %d fhpat %d ", hopset, hoppat));
break;
- case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
- ND_PRINT((ndo, "%ddB signal ", u.u8));
+ }
+
+ case IEEE80211_RADIOTAP_DBM_ANTSIGNAL: {
+ int8_t dbm_antsignal;
+
+ rc = cpack_int8(s, &dbm_antsignal);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%ddBm signal ", dbm_antsignal));
break;
- case IEEE80211_RADIOTAP_DB_ANTNOISE:
- ND_PRINT((ndo, "%ddB noise ", u.u8));
+ }
+
+ case IEEE80211_RADIOTAP_DBM_ANTNOISE: {
+ int8_t dbm_antnoise;
+
+ rc = cpack_int8(s, &dbm_antnoise);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%ddBm noise ", dbm_antnoise));
break;
- case IEEE80211_RADIOTAP_LOCK_QUALITY:
- ND_PRINT((ndo, "%u sq ", u.u16));
+ }
+
+ case IEEE80211_RADIOTAP_LOCK_QUALITY: {
+ uint16_t lock_quality;
+
+ rc = cpack_uint16(s, &lock_quality);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%u sq ", lock_quality));
break;
- case IEEE80211_RADIOTAP_TX_ATTENUATION:
- ND_PRINT((ndo, "%d tx power ", -(int)u.u16));
+ }
+
+ case IEEE80211_RADIOTAP_TX_ATTENUATION: {
+ uint16_t tx_attenuation;
+
+ rc = cpack_uint16(s, &tx_attenuation);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%d tx power ", -(int)tx_attenuation));
break;
- case IEEE80211_RADIOTAP_DB_TX_ATTENUATION:
- ND_PRINT((ndo, "%ddB tx power ", -(int)u.u8));
+ }
+
+ case IEEE80211_RADIOTAP_DB_TX_ATTENUATION: {
+ uint8_t db_tx_attenuation;
+
+ rc = cpack_uint8(s, &db_tx_attenuation);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%ddB tx attenuation ", -(int)db_tx_attenuation));
break;
- case IEEE80211_RADIOTAP_DBM_TX_POWER:
- ND_PRINT((ndo, "%ddBm tx power ", u.i8));
+ }
+
+ case IEEE80211_RADIOTAP_DBM_TX_POWER: {
+ int8_t dbm_tx_power;
+
+ rc = cpack_int8(s, &dbm_tx_power);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%ddBm tx power ", dbm_tx_power));
break;
- case IEEE80211_RADIOTAP_FLAGS:
- if (u.u8 & IEEE80211_RADIOTAP_F_CFP)
- ND_PRINT((ndo, "cfp "));
- if (u.u8 & IEEE80211_RADIOTAP_F_SHORTPRE)
- ND_PRINT((ndo, "short preamble "));
- if (u.u8 & IEEE80211_RADIOTAP_F_WEP)
- ND_PRINT((ndo, "wep "));
- if (u.u8 & IEEE80211_RADIOTAP_F_FRAG)
- ND_PRINT((ndo, "fragmented "));
- if (u.u8 & IEEE80211_RADIOTAP_F_BADFCS)
- ND_PRINT((ndo, "bad-fcs "));
+ }
+
+ case IEEE80211_RADIOTAP_ANTENNA: {
+ uint8_t antenna;
+
+ rc = cpack_uint8(s, &antenna);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "antenna %u ", antenna));
break;
- case IEEE80211_RADIOTAP_ANTENNA:
- ND_PRINT((ndo, "antenna %d ", u.u8));
+ }
+
+ case IEEE80211_RADIOTAP_DB_ANTSIGNAL: {
+ uint8_t db_antsignal;
+
+ rc = cpack_uint8(s, &db_antsignal);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%ddB signal ", db_antsignal));
break;
- case IEEE80211_RADIOTAP_TSFT:
- ND_PRINT((ndo, "%" PRIu64 "us tsft ", u.u64));
+ }
+
+ case IEEE80211_RADIOTAP_DB_ANTNOISE: {
+ uint8_t db_antnoise;
+
+ rc = cpack_uint8(s, &db_antnoise);
+ if (rc != 0)
+ goto trunc;
+ ND_PRINT((ndo, "%ddB noise ", db_antnoise));
break;
- case IEEE80211_RADIOTAP_RX_FLAGS:
+ }
+
+ case IEEE80211_RADIOTAP_RX_FLAGS: {
+ uint16_t rx_flags;
+
+ rc = cpack_uint16(s, &rx_flags);
+ if (rc != 0)
+ goto trunc;
/* Do nothing for now */
break;
- case IEEE80211_RADIOTAP_XCHANNEL:
- print_chaninfo(ndo, u2.u16, u.u32, presentflags);
+ }
+
+ case IEEE80211_RADIOTAP_XCHANNEL: {
+ uint32_t flags;
+ uint16_t frequency;
+ uint8_t channel;
+ uint8_t maxpower;
+
+ rc = cpack_uint32(s, &flags);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint16(s, &frequency);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &channel);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &maxpower);
+ if (rc != 0)
+ goto trunc;
+ print_chaninfo(ndo, frequency, flags, presentflags);
break;
+ }
+
case IEEE80211_RADIOTAP_MCS: {
+ uint8_t known;
+ uint8_t flags;
+ uint8_t mcs_index;
static const char *ht_bandwidth[4] = {
"20 MHz",
"40 MHz",
};
float htrate;
- if (u.u8 & IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN) {
+ rc = cpack_uint8(s, &known);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &flags);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &mcs_index);
+ if (rc != 0)
+ goto trunc;
+ if (known & IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN) {
/*
* We know the MCS index.
*/
- if (u3.u8 <= MAX_MCS_INDEX) {
+ if (mcs_index <= MAX_MCS_INDEX) {
/*
* And it's in-range.
*/
- if (u.u8 & (IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN|IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN)) {
+ if (known & (IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN|IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN)) {
/*
* And we know both the bandwidth and
* the guard interval, so we can look
*/
htrate =
ieee80211_float_htrates \
- [u3.u8] \
- [((u2.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK) == IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 ? 1 : 0)] \
- [((u2.u8 & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 1 : 0)];
+ [mcs_index] \
+ [((flags & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK) == IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 ? 1 : 0)] \
+ [((flags & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 1 : 0)];
} else {
/*
* We don't know both the bandwidth
* We have the rate.
* Print it.
*/
- ND_PRINT((ndo, "%.1f Mb/s MCS %u ", htrate, u3.u8));
+ ND_PRINT((ndo, "%.1f Mb/s MCS %u ", htrate, mcs_index));
} else {
/*
* We at least have the MCS index.
* Print it.
*/
- ND_PRINT((ndo, "MCS %u ", u3.u8));
+ ND_PRINT((ndo, "MCS %u ", mcs_index));
}
}
- if (u.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN) {
ND_PRINT((ndo, "%s ",
- ht_bandwidth[u2.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK]));
+ ht_bandwidth[flags & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK]));
}
- if (u.u8 & IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN) {
ND_PRINT((ndo, "%s GI ",
- (u2.u8 & IEEE80211_RADIOTAP_MCS_SHORT_GI) ?
+ (flags & IEEE80211_RADIOTAP_MCS_SHORT_GI) ?
"short" : "long"));
}
- if (u.u8 & IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN) {
ND_PRINT((ndo, "%s ",
- (u2.u8 & IEEE80211_RADIOTAP_MCS_HT_GREENFIELD) ?
+ (flags & IEEE80211_RADIOTAP_MCS_HT_GREENFIELD) ?
"greenfield" : "mixed"));
}
- if (u.u8 & IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN) {
ND_PRINT((ndo, "%s FEC ",
- (u2.u8 & IEEE80211_RADIOTAP_MCS_FEC_LDPC) ?
+ (flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC) ?
"LDPC" : "BCC"));
}
- if (u.u8 & IEEE80211_RADIOTAP_MCS_STBC_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_MCS_STBC_KNOWN) {
ND_PRINT((ndo, "RX-STBC%u ",
- (u2.u8 & IEEE80211_RADIOTAP_MCS_STBC_MASK) >> IEEE80211_RADIOTAP_MCS_STBC_SHIFT));
+ (flags & IEEE80211_RADIOTAP_MCS_STBC_MASK) >> IEEE80211_RADIOTAP_MCS_STBC_SHIFT));
}
-
break;
}
- case IEEE80211_RADIOTAP_AMPDU_STATUS:
+
+ case IEEE80211_RADIOTAP_AMPDU_STATUS: {
+ uint32_t reference_num;
+ uint16_t flags;
+ uint8_t delim_crc;
+ uint8_t reserved;
+
+ rc = cpack_uint32(s, &reference_num);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint16(s, &flags);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &delim_crc);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &reserved);
+ if (rc != 0)
+ goto trunc;
+ /* Do nothing for now */
break;
+ }
+
case IEEE80211_RADIOTAP_VHT: {
+ uint16_t known;
+ uint8_t flags;
+ uint8_t bandwidth;
+ uint8_t mcs_nss[4];
+ uint8_t coding;
+ uint8_t group_id;
+ uint16_t partial_aid;
static const char *vht_bandwidth[32] = {
"20 MHz",
"40 MHz",
"unknown (31)"
};
+ rc = cpack_uint16(s, &known);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &flags);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &bandwidth);
+ if (rc != 0)
+ goto trunc;
+ for (i = 0; i < 4; i++) {
+ rc = cpack_uint8(s, &mcs_nss[i]);
+ if (rc != 0)
+ goto trunc;
+ }
+ rc = cpack_uint8(s, &coding);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint8(s, &group_id);
+ if (rc != 0)
+ goto trunc;
+ rc = cpack_uint16(s, &partial_aid);
+ if (rc != 0)
+ goto trunc;
for (i = 0; i < 4; i++) {
u_int nss, mcs;
nss = mcs_nss[i] & IEEE80211_RADIOTAP_VHT_NSS_MASK;
ND_PRINT((ndo, "User %u MCS %u ", i, mcs));
ND_PRINT((ndo, "%s FEC ",
- (u4.u8 & (IEEE80211_RADIOTAP_CODING_LDPC_USERn << i)) ?
+ (coding & (IEEE80211_RADIOTAP_CODING_LDPC_USERn << i)) ?
"LDPC" : "BCC"));
}
- if (u.u16 & IEEE80211_RADIOTAP_VHT_BANDWIDTH_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_VHT_BANDWIDTH_KNOWN) {
ND_PRINT((ndo, "%s ",
- vht_bandwidth[u3.u8 & IEEE80211_RADIOTAP_VHT_BANDWIDTH_MASK]));
+ vht_bandwidth[bandwidth & IEEE80211_RADIOTAP_VHT_BANDWIDTH_MASK]));
}
- if (u.u16 & IEEE80211_RADIOTAP_VHT_GUARD_INTERVAL_KNOWN) {
+ if (known & IEEE80211_RADIOTAP_VHT_GUARD_INTERVAL_KNOWN) {
ND_PRINT((ndo, "%s GI ",
- (u2.u8 & IEEE80211_RADIOTAP_VHT_SHORT_GI) ?
+ (flags & IEEE80211_RADIOTAP_VHT_SHORT_GI) ?
"short" : "long"));
}
break;
}
+
+ default:
+ /* this bit indicates a field whose
+ * size we do not know, so we cannot
+ * proceed. Just print the bit number.
+ */
+ ND_PRINT((ndo, "[bit %u] ", bit));
+ return -1;
}
+
return 0;
+
+trunc:
+ ND_PRINT((ndo, "%s", tstr));
+ return rc;
}
projects / tcpdump / commitdiff
