/* $OpenBSD: print-802_11.c,v 1.40 2017/09/01 14:04:49 stsp Exp $ */ /* * Copyright (c) 2005 Reyk Floeter * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "addrtoname.h" #include "interface.h" const char *ieee80211_ctl_subtype_name[] = { "reserved#0", "reserved#1", "reserved#2", "reserved#3", "reserved#4", "reserved#5", "reserved#6", "wrapper", "block ack request", "block ack", "ps poll", "rts", "cts", "ack", "cf-end", "cf-end-ack", }; const char *ieee80211_mgt_subtype_name[] = { "association request", "association response", "reassociation request", "reassociation response", "probe request", "probe response", "reserved#6", "reserved#7", "beacon", "atim", "disassociation", "authentication", "deauthentication", "action", "action noack", "reserved#15" }; const char *ieee80211_data_subtype_name[] = { "data", "data cf ack", "data cf poll", "data cf poll ack", "no-data", "no-data cf poll", "no-data cf ack", "no-data cf poll ack", "QoS data", "QoS data cf ack", "QoS data cf poll", "QoS data cf poll ack", "QoS no-data", "QoS no-data cf poll", "QoS no-data cf ack", "QoS no-data cf poll ack" }; int ieee80211_hdr(struct ieee80211_frame *); int ieee80211_data(struct ieee80211_frame *, u_int); void ieee80211_print_element(u_int8_t *, u_int); void ieee80211_print_essid(u_int8_t *, u_int); void ieee80211_print_country(u_int8_t *, u_int); void ieee80211_print_htcaps(u_int8_t *, u_int); void ieee80211_print_htop(u_int8_t *, u_int); void ieee80211_print_rsncipher(u_int8_t []); void ieee80211_print_akm(u_int8_t []); void ieee80211_print_rsn(u_int8_t *, u_int); int ieee80211_print_beacon(struct ieee80211_frame *, u_int); int ieee80211_print_assocreq(struct ieee80211_frame *, u_int); int ieee80211_print_elements(uint8_t *); int ieee80211_frame(struct ieee80211_frame *, u_int); int ieee80211_print(struct ieee80211_frame *, u_int); u_int ieee80211_any2ieee(u_int, u_int); void ieee80211_reason(u_int16_t); #define TCARR(a) TCHECK2(*a, sizeof(a)) int ieee80211_encap = 0; int ieee80211_hdr(struct ieee80211_frame *wh) { struct ieee80211_frame_addr4 *w4; switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { case IEEE80211_FC1_DIR_NODS: TCARR(wh->i_addr2); printf("%s", etheraddr_string(wh->i_addr2)); TCARR(wh->i_addr1); printf(" > %s", etheraddr_string(wh->i_addr1)); TCARR(wh->i_addr3); printf(", bssid %s", etheraddr_string(wh->i_addr3)); break; case IEEE80211_FC1_DIR_TODS: TCARR(wh->i_addr2); printf("%s", etheraddr_string(wh->i_addr2)); TCARR(wh->i_addr3); printf(" > %s", etheraddr_string(wh->i_addr3)); TCARR(wh->i_addr1); printf(", bssid %s, > DS", etheraddr_string(wh->i_addr1)); break; case IEEE80211_FC1_DIR_FROMDS: TCARR(wh->i_addr3); printf("%s", etheraddr_string(wh->i_addr3)); TCARR(wh->i_addr1); printf(" > %s", etheraddr_string(wh->i_addr1)); TCARR(wh->i_addr2); printf(", bssid %s, DS >", etheraddr_string(wh->i_addr2)); break; case IEEE80211_FC1_DIR_DSTODS: w4 = (struct ieee80211_frame_addr4 *) wh; TCARR(w4->i_addr4); printf("%s", etheraddr_string(w4->i_addr4)); TCARR(w4->i_addr3); printf(" > %s", etheraddr_string(w4->i_addr3)); TCARR(w4->i_addr2); printf(", bssid %s", etheraddr_string(w4->i_addr2)); TCARR(w4->i_addr1); printf(" > %s, DS > DS", etheraddr_string(w4->i_addr1)); break; } if (vflag) { u_int16_t seq; TCARR(wh->i_seq); bcopy(wh->i_seq, &seq, sizeof(u_int16_t)); printf(" (seq %u): ", letoh16(seq)); } else printf(": "); return (0); trunc: /* Truncated elements in frame */ return (1); } int ieee80211_data(struct ieee80211_frame *wh, u_int len) { u_int8_t *t = (u_int8_t *)wh; u_int datalen; int data = !(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_NODATA); int hasqos = ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_QOS)) == (IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS)); u_char *esrc = NULL, *edst = NULL; if (hasqos) { struct ieee80211_qosframe *wq; wq = (struct ieee80211_qosframe *) wh; TCHECK(*wq); t += sizeof(*wq); datalen = len - sizeof(*wq); } else { TCHECK(*wh); t += sizeof(*wh); datalen = len - sizeof(*wh); } switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { case IEEE80211_FC1_DIR_TODS: esrc = wh->i_addr2; edst = wh->i_addr3; break; case IEEE80211_FC1_DIR_FROMDS: esrc = wh->i_addr3; edst = wh->i_addr1; break; case IEEE80211_FC1_DIR_NODS: esrc = wh->i_addr2; edst = wh->i_addr1; break; case IEEE80211_FC1_DIR_DSTODS: if (hasqos) { struct ieee80211_qosframe_addr4 *w4; w4 = (struct ieee80211_qosframe_addr4 *) wh; TCHECK(*w4); t = (u_int8_t *) (w4 + 1); datalen = len - sizeof(*w4); esrc = w4->i_addr4; edst = w4->i_addr3; } else { struct ieee80211_frame_addr4 *w4; w4 = (struct ieee80211_frame_addr4 *) wh; TCHECK(*w4); t = (u_int8_t *) (w4 + 1); datalen = len - sizeof(*w4); esrc = w4->i_addr4; edst = w4->i_addr3; } break; } if (data && esrc) llc_print(t, datalen, datalen, esrc, edst); else if (eflag && esrc) printf("%s > %s", etheraddr_string(esrc), etheraddr_string(edst)); return (0); trunc: /* Truncated elements in frame */ return (1); } /* Caller checks len */ void ieee80211_print_element(u_int8_t *data, u_int len) { u_int8_t *p; int i; printf(" 0x"); for (i = 0, p = data; i < len; i++, p++) printf("%02x", *p); } /* Caller checks len */ void ieee80211_print_essid(u_int8_t *essid, u_int len) { u_int8_t *p; int i; if (len > IEEE80211_NWID_LEN) len = IEEE80211_NWID_LEN; /* determine printable or not */ for (i = 0, p = essid; i < len; i++, p++) { if (*p < ' ' || *p > 0x7e) break; } if (i == len) { printf(" ("); for (i = 0, p = essid; i < len; i++, p++) putchar(*p); putchar(')'); } else ieee80211_print_element(essid, len); } /* Caller checks len */ void ieee80211_print_country(u_int8_t *data, u_int len) { u_int8_t first_chan, nchan, maxpower; if (len < 6) return; /* country string */ printf((isprint(data[0]) ? " '%c" : " '\\%03o"), data[0]); printf((isprint(data[1]) ? "%c" : "\\%03o"), data[1]); printf((isprint(data[2]) ? "%c'" : "\\%03o'"), data[2]); len -= 3; data += 3; /* channels and corresponding TX power limits */ while (len >= 3) { /* no pretty-printing for nonsensical zero values, * nor for operating extension IDs (values >= 201) */ if (data[0] == 0 || data[1] == 0 || data[0] >= 201 || data[1] >= 201) { printf(", %d %d %d", data[0], data[1], data[2]); len -= 3; data += 3; continue; } first_chan = data[0]; nchan = data[1]; maxpower = data[2]; printf(", channel%s %d", nchan == 1 ? "" : "s", first_chan); if (nchan > 1) printf("-%d", first_chan + nchan - 1); printf(" limit %ddB", maxpower); len -= 3; data += 3; } } /* Caller checks len */ void ieee80211_print_htcaps(u_int8_t *data, u_int len) { uint16_t htcaps, rxrate; int smps, rxstbc; uint8_t ampdu, txmcs; int i; uint8_t *rxmcs; if (len < 2) { ieee80211_print_element(data, len); return; } htcaps = (data[0]) | (data[1] << 8); printf("=<"); /* channel width */ if (htcaps & IEEE80211_HTCAP_CBW20_40) printf("20/40MHz"); else printf("20MHz"); /* LDPC coding */ if (htcaps & IEEE80211_HTCAP_LDPC) printf(",LDPC"); /* spatial multiplexing power save mode */ smps = (htcaps & IEEE80211_HTCAP_SMPS_MASK) >> IEEE80211_HTCAP_SMPS_SHIFT; if (smps == 0) printf(",SMPS static"); else if (smps == 1) printf(",SMPS dynamic"); /* 11n greenfield mode */ if (htcaps & IEEE80211_HTCAP_GF) printf(",greenfield"); /* short guard interval */ if (htcaps & IEEE80211_HTCAP_SGI20) printf(",SGI@20MHz"); if (htcaps & IEEE80211_HTCAP_SGI40) printf(",SGI@40MHz"); /* space-time block coding */ if (htcaps & IEEE80211_HTCAP_TXSTBC) printf(",TXSTBC"); rxstbc = (htcaps & IEEE80211_HTCAP_RXSTBC_MASK) >> IEEE80211_HTCAP_RXSTBC_SHIFT; if (rxstbc > 0 && rxstbc < 4) printf(",RXSTBC %d stream", rxstbc); /* delayed block-ack */ if (htcaps & IEEE80211_HTCAP_DELAYEDBA) printf(",delayed BA"); /* max A-MSDU length */ if (htcaps & IEEE80211_HTCAP_AMSDU7935) printf(",A-MSDU 7935"); else printf(",A-MSDU 3839"); /* DSSS/CCK in 40MHz mode */ if (htcaps & IEEE80211_HTCAP_DSSSCCK40) printf(",DSSS/CCK@40MHz"); /* 40MHz intolerant */ if (htcaps & IEEE80211_HTCAP_40INTOLERANT) printf(",40MHz intolerant"); /* L-SIG TXOP protection */ if (htcaps & IEEE80211_HTCAP_LSIGTXOPPROT) printf(",L-SIG TXOP prot"); if (len < 3) { printf(">"); return; } /* A-MPDU parameters. */ ampdu = data[2]; /* A-MPDU length exponent */ if ((ampdu & IEEE80211_AMPDU_PARAM_LE) >= 0 && (ampdu & IEEE80211_AMPDU_PARAM_LE) <= 3) printf(",A-MPDU max %d", (1 << (13 + (ampdu & IEEE80211_AMPDU_PARAM_LE))) - 1); /* A-MPDU start spacing */ if (ampdu & IEEE80211_AMPDU_PARAM_SS) { float ss; switch ((ampdu & IEEE80211_AMPDU_PARAM_SS) >> 2) { case 1: ss = 0.25; break; case 2: ss = 0.5; break; case 3: ss = 1; break; case 4: ss = 2; break; case 5: ss = 4; break; case 6: ss = 8; break; case 7: ss = 16; break; default: ss = 0; break; } if (ss != 0) printf(",A-MPDU spacing %.2fus", ss); } if (len < 21) { printf(">"); return; } /* Supported MCS set. */ printf(",RxMCS 0x"); rxmcs = &data[3]; for (i = 0; i < 10; i++) printf("%02x", rxmcs[i]); /* Max MCS Rx rate (a value of 0 means "not specified"). */ rxrate = ((data[13] | (data[14]) << 8) & IEEE80211_MCS_RX_RATE_HIGH); if (rxrate) printf(",RxMaxrate %huMb/s", rxrate); /* Tx MCS Set */ txmcs = data[15]; if (txmcs & IEEE80211_TX_MCS_SET_DEFINED) { if (txmcs & IEEE80211_TX_RX_MCS_NOT_EQUAL) { /* Number of spatial Tx streams. */ printf(",%d Tx streams", 1 + ((txmcs & IEEE80211_TX_SPATIAL_STREAMS) >> 2)); /* Transmit unequal modulation supported. */ if (txmcs & IEEE80211_TX_UNEQUAL_MODULATION) printf(",UEQM"); } } printf(">"); } /* Caller checks len */ void ieee80211_print_htop(u_int8_t *data, u_int len) { u_int8_t primary_chan; u_int8_t htopinfo[5]; u_int8_t basic_mcs[16]; int sco, htprot, i; if (len < sizeof(primary_chan) + sizeof(htopinfo) + sizeof(basic_mcs)) { ieee80211_print_element(data, len); return; } htopinfo[0] = data[1]; printf("=<"); /* primary channel and secondary channel offset */ primary_chan = data[0]; sco = ((htopinfo[0] & IEEE80211_HTOP0_SCO_MASK) >> IEEE80211_HTOP0_SCO_SHIFT); if (sco == 0) /* no secondary channel */ printf("20MHz chan %d", primary_chan); else if (sco == 1) { /* secondary channel above */ if (primary_chan >= 1 && primary_chan <= 13) /* 2GHz */ printf("40MHz chan %d:%d", primary_chan, primary_chan + 1); else if (primary_chan >= 34) /* 5GHz */ printf("40MHz chan %d:%d", primary_chan, primary_chan + 4); else printf("[invalid 40MHz chan %d+]", primary_chan); } else if (sco == 3) { /* secondary channel below */ if (primary_chan >= 2 && primary_chan <= 14) /* 2GHz */ printf("40MHz chan %d:%d", primary_chan, primary_chan - 1); else if (primary_chan >= 40) /* 5GHz */ printf("40MHz chan %d:%d", primary_chan, primary_chan - 4); else printf("[invalid 40MHz chan %d-]", primary_chan); } else printf("chan %d [invalid secondary channel offset %d]", primary_chan, sco); /* STA channel width */ if ((htopinfo[0] & IEEE80211_HTOP0_CHW) == 0) printf(",STA chanw 20MHz"); /* reduced interframe space (RIFS) permitted */ if (htopinfo[0] & IEEE80211_HTOP0_RIFS) printf(",RIFS"); htopinfo[1] = data[2]; /* protection requirements for HT transmissions */ htprot = ((htopinfo[1] & IEEE80211_HTOP1_PROT_MASK) >> IEEE80211_HTOP1_PROT_SHIFT); switch (htprot) { case IEEE80211_HTPROT_NONE: printf(",htprot none"); break; case IEEE80211_HTPROT_NONMEMBER: printf(",htprot non-member"); break; case IEEE80211_HTPROT_20MHZ: printf(",htprot 20MHz"); break; case IEEE80211_HTPROT_NONHT_MIXED: printf(",htprot non-HT-mixed"); break; default: printf(",htprot %d", htprot); break; } /* non-greenfield STA present */ if (htopinfo[1] & IEEE80211_HTOP1_NONGF_STA) printf(",non-greenfield STA"); /* non-HT STA present */ if (htopinfo[1] & IEEE80211_HTOP1_OBSS_NONHT_STA) printf(",non-HT STA"); htopinfo[3] = data[4]; /* dual-beacon */ if (htopinfo[3] & IEEE80211_HTOP2_DUALBEACON) printf(",dualbeacon"); /* dual CTS protection */ if (htopinfo[3] & IEEE80211_HTOP2_DUALCTSPROT) printf(",dualctsprot"); htopinfo[4] = data[5]; /* space-time block coding (STBC) beacon */ if ((htopinfo[4] << 8) & IEEE80211_HTOP2_STBCBEACON) printf(",STBC beacon"); /* L-SIG (non-HT signal field) TX opportunity (TXOP) protection */ if ((htopinfo[4] << 8) & IEEE80211_HTOP2_LSIGTXOP) printf(",lsigtxprot"); /* phased-coexistence operation (PCO) active */ if ((htopinfo[4] << 8) & IEEE80211_HTOP2_PCOACTIVE) { /* PCO phase */ if ((htopinfo[4] << 8) & IEEE80211_HTOP2_PCOPHASE40) printf(",pco40MHz"); else printf(",pco20MHz"); } /* basic MCS set */ memcpy(basic_mcs, &data[6], sizeof(basic_mcs)); printf(",basic MCS set 0x"); for (i = 0; i < sizeof(basic_mcs) / sizeof(basic_mcs[0]); i++) printf("%x", basic_mcs[i]); printf(">"); } void ieee80211_print_rsncipher(uint8_t selector[4]) { if (memcmp(selector, MICROSOFT_OUI, 3) != 0 && memcmp(selector, IEEE80211_OUI, 3) != 0) { printf("0x%x%x%x%x", selector[0], selector[1], selector[2], selector[3]); return; } /* See 802.11-2012 Table 8-99 */ switch (selector[3]) { case 0: /* use group data cipher suite */ printf("usegroup"); break; case 1: /* WEP-40 */ printf("wep40"); break; case 2: /* TKIP */ printf("tkip"); break; case 4: /* CCMP (RSNA default) */ printf("ccmp"); break; case 5: /* WEP-104 */ printf("wep104"); break; case 6: /* BIP */ printf("bip"); break; default: printf("%d", selector[3]); break; } } void ieee80211_print_akm(uint8_t selector[4]) { if (memcmp(selector, MICROSOFT_OUI, 3) != 0 && memcmp(selector, IEEE80211_OUI, 3) != 0) { printf("0x%x%x%x%x", selector[0], selector[1], selector[2], selector[3]); return; } switch (selector[3]) { case 1: printf("802.1x"); break; case 2: printf("PSK"); break; case 5: printf("SHA256-802.1x"); break; case 6: printf("SHA256-PSK"); break; default: printf("%d", selector[3]); break; } } /* Caller checks len */ void ieee80211_print_rsn(u_int8_t *data, u_int len) { uint16_t version, nciphers, nakms, rsncap, npmk; int i, j; uint8_t selector[4]; if (len < 2) { ieee80211_print_element(data, len); return; } version = (data[0]) | (data[1] << 8); printf("="); return; } data += 2; printf(",groupcipher "); for (i = 0; i < 4; i++) selector[i] = data[i]; ieee80211_print_rsncipher(selector); if (len < 8) { printf(">"); return; } data += 4; nciphers = (data[0]) | ((data[1]) << 8); data += 2; if (len < 8 + (nciphers * 4)) { printf(">"); return; } printf(",cipher%s ", nciphers > 1 ? "s" : ""); for (i = 0; i < nciphers; i++) { for (j = 0; j < 4; j++) selector[j] = data[i + j]; ieee80211_print_rsncipher(selector); if (i < nciphers - 1) printf(" "); data += 4; } if (len < 8 + (nciphers * 4) + 2) { printf(">"); return; } nakms = (data[0]) | ((data[1]) << 8); data += 2; if (len < 8 + (nciphers * 4) + 2 + (nakms * 4)) { printf(">"); return; } printf(",akm%s ", nakms > 1 ? "s" : ""); for (i = 0; i < nciphers; i++) { for (j = 0; j < 4; j++) selector[j] = data[i + j]; ieee80211_print_akm(selector); if (i < nciphers - 1) printf(" "); data += 4; } if (len < 8 + (nciphers * 4) + 2 + (nakms * 4) + 2) { printf(">"); return; } rsncap = (data[0]) | ((data[1]) << 8); printf(",rsncap 0x%x", rsncap); data += 2; if (len < 8 + (nciphers * 4) + 2 + (nakms * 4) + 2 + 2) { printf(">"); return; } npmk = (data[0]) | ((data[1]) << 8); data += 2; if (len < 8 + (nciphers * 4) + 2 + (nakms * 4) + 2 + 2 + (npmk * IEEE80211_PMKID_LEN)) { printf(">"); return; } if (npmk >= 1) printf(",pmkid%s ", npmk > 1 ? "s" : ""); for (i = 0; i < npmk; i++) { printf("0x"); for (j = 0; j < IEEE80211_PMKID_LEN; j++) printf("%x", data[i + j]); if (i < npmk - 1) printf(" "); data += IEEE80211_PMKID_LEN; } if (len < 8 + (nciphers * 4) + 2 + (nakms * 4) + 2 + 2 + (npmk * IEEE80211_PMKID_LEN) + 4) { printf(">"); return; } printf(",integrity-groupcipher "); for (i = 0; i < 4; i++) selector[i] = data[i]; ieee80211_print_rsncipher(selector); printf(">"); } int ieee80211_print_beacon(struct ieee80211_frame *wh, u_int len) { uint64_t tstamp; uint16_t bintval, capinfo; uint8_t *frm; if (len < sizeof(tstamp) + sizeof(bintval) + sizeof(capinfo)) return 1; /* truncated */ frm = (u_int8_t *)&wh[1]; bcopy(frm, &tstamp, sizeof(u_int64_t)); frm += 8; if (vflag > 1) printf(", timestamp %llu", letoh64(tstamp)); bcopy(frm, &bintval, sizeof(u_int16_t)); frm += 2; if (vflag > 1) printf(", interval %u", letoh16(bintval)); bcopy(frm, &capinfo, sizeof(u_int16_t)); frm += 2; if (vflag) printb(", caps", letoh16(capinfo), IEEE80211_CAPINFO_BITS); return ieee80211_print_elements(frm); } int ieee80211_print_assocreq(struct ieee80211_frame *wh, u_int len) { uint8_t subtype; uint16_t capinfo, lintval; uint8_t *frm; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if (len < sizeof(capinfo) + sizeof(lintval) + (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ ? IEEE80211_ADDR_LEN : 0)) return 1; /* truncated */ frm = (u_int8_t *)&wh[1]; bcopy(frm, &capinfo, sizeof(u_int16_t)); frm += 2; if (vflag) printb(", caps", letoh16(capinfo), IEEE80211_CAPINFO_BITS); bcopy(frm, &lintval, sizeof(u_int16_t)); frm += 2; if (vflag > 1) printf(", listen interval %u", letoh16(lintval)); if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { if (vflag) printf(", AP %s", etheraddr_string(frm)); frm += IEEE80211_ADDR_LEN; } return ieee80211_print_elements(frm); } int ieee80211_print_elements(uint8_t *frm) { int i; while (TTEST2(*frm, 2)) { u_int len = frm[1]; u_int8_t *data = frm + 2; if (!TTEST2(*data, len)) break; #define ELEM_CHECK(l) if (len != l) goto trunc switch (*frm) { case IEEE80211_ELEMID_SSID: printf(", ssid"); ieee80211_print_essid(data, len); break; case IEEE80211_ELEMID_RATES: printf(", rates"); if (!vflag) break; for (i = len; i > 0; i--, data++) printf(" %uM%s", (data[0] & IEEE80211_RATE_VAL) / 2, (data[0] & IEEE80211_RATE_BASIC ? "*" : "")); break; case IEEE80211_ELEMID_FHPARMS: ELEM_CHECK(5); printf(", fh (dwell %u, chan %u, index %u)", (data[1] << 8) | data[0], (data[2] - 1) * 80 + data[3], /* FH_CHAN */ data[4]); break; case IEEE80211_ELEMID_DSPARMS: ELEM_CHECK(1); printf(", ds"); if (vflag) printf(" (chan %u)", data[0]); break; case IEEE80211_ELEMID_CFPARMS: printf(", cf"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_TIM: printf(", tim"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_IBSSPARMS: printf(", ibss"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_COUNTRY: printf(", country"); if (vflag) ieee80211_print_country(data, len); break; case IEEE80211_ELEMID_CHALLENGE: printf(", challenge"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_CSA: ELEM_CHECK(3); printf(", csa (chan %u count %u%s)", data[1], data[2], (data[0] == 1) ? " noTX" : ""); break; case IEEE80211_ELEMID_ERP: printf(", erp"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_RSN: printf(", rsn"); if (vflag) ieee80211_print_rsn(data, len); break; case IEEE80211_ELEMID_XRATES: printf(", xrates"); if (!vflag) break; for (i = len; i > 0; i--, data++) printf(" %uM", (data[0] & IEEE80211_RATE_VAL) / 2); break; case IEEE80211_ELEMID_TPC_REPORT: printf(", tpcreport"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_TPC_REQUEST: printf(", tpcrequest"); if (vflag) ieee80211_print_element(data, len); break; case IEEE80211_ELEMID_HTCAPS: printf(", htcaps"); if (vflag) ieee80211_print_htcaps(data, len); break; case IEEE80211_ELEMID_HTOP: printf(", htop"); if (vflag) ieee80211_print_htop(data, len); break; case IEEE80211_ELEMID_POWER_CONSTRAINT: ELEM_CHECK(1); printf(", power constraint %udB", data[0]); break; case IEEE80211_ELEMID_QBSS_LOAD: ELEM_CHECK(5); printf(", %u stations, %d%% utilization, " "admission capacity %uus/s", (data[0] | data[1] << 8), (data[2] * 100) / 255, (data[3] | data[4] << 8) / 32); break; case IEEE80211_ELEMID_VENDOR: printf(", vendor"); if (vflag) ieee80211_print_element(data, len); break; default: printf(", %u:%u", (u_int) *frm, len); if (vflag) ieee80211_print_element(data, len); break; } frm += len + 2; if (frm >= snapend) break; } #undef ELEM_CHECK return (0); trunc: /* Truncated elements in frame */ return (1); } int ieee80211_frame(struct ieee80211_frame *wh, u_int len) { u_int8_t subtype, type, *frm; TCARR(wh->i_fc); type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; frm = (u_int8_t *)&wh[1]; if (vflag) printb(" flags", wh->i_fc[1], IEEE80211_FC1_BITS); switch (type) { case IEEE80211_FC0_TYPE_DATA: printf(": %s: ", ieee80211_data_subtype_name[ subtype >> IEEE80211_FC0_SUBTYPE_SHIFT]); ieee80211_data(wh, len); break; case IEEE80211_FC0_TYPE_MGT: printf(": %s", ieee80211_mgt_subtype_name[ subtype >> IEEE80211_FC0_SUBTYPE_SHIFT]); switch (subtype) { case IEEE80211_FC0_SUBTYPE_BEACON: case IEEE80211_FC0_SUBTYPE_PROBE_RESP: if (ieee80211_print_beacon(wh, len) != 0) goto trunc; break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: if (ieee80211_print_assocreq(wh, len) != 0) goto trunc; break; case IEEE80211_FC0_SUBTYPE_AUTH: TCHECK2(*frm, 2); /* Auth Algorithm */ switch (IEEE80211_AUTH_ALGORITHM(frm)) { case IEEE80211_AUTH_ALG_OPEN: TCHECK2(*frm, 4); /* Auth Transaction */ switch (IEEE80211_AUTH_TRANSACTION(frm)) { case IEEE80211_AUTH_OPEN_REQUEST: printf(" request"); break; case IEEE80211_AUTH_OPEN_RESPONSE: printf(" response"); break; } break; case IEEE80211_AUTH_ALG_SHARED: TCHECK2(*frm, 4); /* Auth Transaction */ switch (IEEE80211_AUTH_TRANSACTION(frm)) { case IEEE80211_AUTH_SHARED_REQUEST: printf(" request"); break; case IEEE80211_AUTH_SHARED_CHALLENGE: printf(" challenge"); break; case IEEE80211_AUTH_SHARED_RESPONSE: printf(" response"); break; case IEEE80211_AUTH_SHARED_PASS: printf(" pass"); break; } break; case IEEE80211_AUTH_ALG_LEAP: printf(" (leap)"); break; } break; case IEEE80211_FC0_SUBTYPE_DEAUTH: case IEEE80211_FC0_SUBTYPE_DISASSOC: TCHECK2(*frm, 2); /* Reason Code */ ieee80211_reason(frm[0] | (frm[1] << 8)); break; } break; case IEEE80211_FC0_TYPE_CTL: { u_int8_t *t = (u_int8_t *) wh; printf(": %s", ieee80211_ctl_subtype_name[ subtype >> IEEE80211_FC0_SUBTYPE_SHIFT]); if (!vflag) break; /* See 802.11 2012 "8.3.1 Control frames". */ t += 2; /* skip Frame Control */ switch (subtype) { case IEEE80211_FC0_SUBTYPE_RTS: case IEEE80211_FC0_SUBTYPE_BAR: case IEEE80211_FC0_SUBTYPE_BA: TCHECK2(*t, 2); /* Duration */ printf(", duration %dus", (t[0] | t[1] << 8)); t += 2; TCHECK2(*t, 6); /* RA */ printf(", ra %s", etheraddr_string(t)); t += 6; TCHECK2(*t, 6); /* TA */ printf(", ta %s", etheraddr_string(t)); if (subtype == IEEE80211_FC0_SUBTYPE_BAR || subtype == IEEE80211_FC0_SUBTYPE_BA) { u_int16_t ctrl; t += 6; TCHECK2(*t, 2); /* BAR/BA control */ ctrl = t[0] | (t[1] << 8); if (ctrl & IEEE80211_BA_ACK_POLICY) printf(", no ack"); else printf(", normal ack"); if ((ctrl & IEEE80211_BA_MULTI_TID) == 0 && (ctrl & IEEE80211_BA_COMPRESSED) == 0) printf(", basic variant"); else if ((ctrl & IEEE80211_BA_MULTI_TID) && (ctrl & IEEE80211_BA_COMPRESSED)) printf(", multi-tid variant"); else if (ctrl & IEEE80211_BA_COMPRESSED) printf(", compressed variant"); } break; case IEEE80211_FC0_SUBTYPE_CTS: case IEEE80211_FC0_SUBTYPE_ACK: TCHECK2(*t, 2); /* Duration */ printf(", duration %dus", (t[0] | t[1] << 8)); t += 2; TCHECK2(*t, 6); /* RA */ printf(", ra %s", etheraddr_string(t)); break; case IEEE80211_FC0_SUBTYPE_PS_POLL: TCHECK2(*t, 2); /* AID */ printf(", aid 0x%x", (t[0] | t[1] << 8)); t += 2; TCHECK2(*t, 6); /* BSSID(RA) */ printf(", ra %s", etheraddr_string(t)); t += 6; TCHECK2(*t, 6); /* TA */ printf(", ta %s", etheraddr_string(t)); break; } break; } default: printf(": type#%d", type); break; } return (0); trunc: /* Truncated 802.11 frame */ return (1); } u_int ieee80211_any2ieee(u_int freq, u_int flags) { if (flags & IEEE80211_CHAN_2GHZ) { if (freq == 2484) return 14; if (freq < 2484) return (freq - 2407) / 5; else return 15 + ((freq - 2512) / 20); } else if (flags & IEEE80211_CHAN_5GHZ) { return (freq - 5000) / 5; } else { /* Assume channel is already an IEEE number */ return (freq); } } int ieee80211_print(struct ieee80211_frame *wh, u_int len) { if (eflag) if (ieee80211_hdr(wh)) return (1); printf("802.11"); return (ieee80211_frame(wh, len)); } void ieee802_11_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) { struct ieee80211_frame *wh = (struct ieee80211_frame*)p; if (!ieee80211_encap) ts_print(&h->ts); packetp = p; snapend = p + h->caplen; if (ieee80211_print(wh, (u_int)h->len) != 0) printf("[|802.11]"); if (!ieee80211_encap) { if (xflag) default_print(p, (u_int)h->len); putchar('\n'); } } void ieee802_11_radio_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) { struct ieee80211_radiotap_header *rh = (struct ieee80211_radiotap_header*)p; struct ieee80211_frame *wh; u_int8_t *t; u_int32_t present; u_int len, rh_len; u_int16_t tmp; if (!ieee80211_encap) ts_print(&h->ts); packetp = p; snapend = p + h->caplen; TCHECK(*rh); len = h->len; rh_len = letoh16(rh->it_len); if (rh->it_version != 0) { printf("[?radiotap + 802.11 v:%u]", rh->it_version); goto out; } wh = (struct ieee80211_frame *)(p + rh_len); if (len <= rh_len || ieee80211_print(wh, len - rh_len)) printf("[|802.11]"); t = (u_int8_t*)p + sizeof(struct ieee80211_radiotap_header); if ((present = letoh32(rh->it_present)) == 0) goto out; printf(", it_version); #define RADIOTAP(_x) \ (present & (1 << IEEE80211_RADIOTAP_##_x)) if (RADIOTAP(TSFT)) { u_int64_t tsf; TCHECK2(*t, 8); bcopy(t, &tsf, sizeof(u_int64_t)); if (vflag > 1) printf(", tsf %llu", letoh64(tsf)); t += 8; } if (RADIOTAP(FLAGS)) { u_int8_t flags = *(u_int8_t*)t; TCHECK2(*t, 1); if (flags & IEEE80211_RADIOTAP_F_CFP) printf(", CFP"); if (flags & IEEE80211_RADIOTAP_F_SHORTPRE) printf(", SHORTPRE"); if (flags & IEEE80211_RADIOTAP_F_WEP) printf(", WEP"); if (flags & IEEE80211_RADIOTAP_F_FRAG) printf(", FRAG"); t += 1; } if (RADIOTAP(RATE)) { TCHECK2(*t, 1); if (vflag) { uint8_t rate = *(u_int8_t*)t; if (rate & 0x80) printf(", MCS %u", rate & 0x7f); else printf(", %uMbit/s", rate / 2); } t += 1; } if (RADIOTAP(CHANNEL)) { u_int16_t freq, flags; TCHECK2(*t, 2); bcopy(t, &freq, sizeof(u_int16_t)); freq = letoh16(freq); t += 2; TCHECK2(*t, 2); bcopy(t, &flags, sizeof(u_int16_t)); flags = letoh16(flags); t += 2; printf(", chan %u", ieee80211_any2ieee(freq, flags)); if (flags & IEEE80211_CHAN_HT) printf(", 11n"); else if (flags & IEEE80211_CHAN_DYN && flags & IEEE80211_CHAN_2GHZ) printf(", 11g"); else if (flags & IEEE80211_CHAN_CCK && flags & IEEE80211_CHAN_2GHZ) printf(", 11b"); else if (flags & IEEE80211_CHAN_OFDM && flags & IEEE80211_CHAN_2GHZ) printf(", 11G"); else if (flags & IEEE80211_CHAN_OFDM && flags & IEEE80211_CHAN_5GHZ) printf(", 11a"); if (flags & IEEE80211_CHAN_XR) printf(", XR"); } if (RADIOTAP(FHSS)) { TCHECK2(*t, 2); printf(", fhss %u/%u", *(u_int8_t*)t, *(u_int8_t*)t + 1); t += 2; } if (RADIOTAP(DBM_ANTSIGNAL)) { TCHECK(*t); printf(", sig %ddBm", *(int8_t*)t); t += 1; } if (RADIOTAP(DBM_ANTNOISE)) { TCHECK(*t); printf(", noise %ddBm", *(int8_t*)t); t += 1; } if (RADIOTAP(LOCK_QUALITY)) { TCHECK2(*t, 2); if (vflag) { bcopy(t, &tmp, sizeof(u_int16_t)); printf(", quality %u", letoh16(tmp)); } t += 2; } if (RADIOTAP(TX_ATTENUATION)) { TCHECK2(*t, 2); if (vflag) { bcopy(t, &tmp, sizeof(u_int16_t)); printf(", txatt %u", letoh16(tmp)); } t += 2; } if (RADIOTAP(DB_TX_ATTENUATION)) { TCHECK2(*t, 2); if (vflag) { bcopy(t, &tmp, sizeof(u_int16_t)); printf(", txatt %udB", letoh16(tmp)); } t += 2; } if (RADIOTAP(DBM_TX_POWER)) { TCHECK(*t); printf(", txpower %ddBm", *(int8_t*)t); t += 1; } if (RADIOTAP(ANTENNA)) { TCHECK(*t); if (vflag) printf(", antenna %u", *(u_int8_t*)t); t += 1; } if (RADIOTAP(DB_ANTSIGNAL)) { TCHECK(*t); printf(", signal %udB", *(u_int8_t*)t); t += 1; } if (RADIOTAP(DB_ANTNOISE)) { TCHECK(*t); printf(", noise %udB", *(u_int8_t*)t); t += 1; } if (RADIOTAP(FCS)) { TCHECK2(*t, 4); if (vflag) { u_int32_t fcs; bcopy(t, &fcs, sizeof(u_int32_t)); printf(", fcs %08x", letoh32(fcs)); } t += 4; } if (RADIOTAP(RSSI)) { u_int8_t rssi, max_rssi; TCHECK(*t); rssi = *(u_int8_t*)t; t += 1; TCHECK(*t); max_rssi = *(u_int8_t*)t; t += 1; printf(", rssi %u/%u", rssi, max_rssi); } #undef RADIOTAP putchar('>'); goto out; trunc: /* Truncated frame */ printf("[|radiotap + 802.11]"); out: if (!ieee80211_encap) { if (xflag) default_print(p, h->len); putchar('\n'); } } void ieee80211_reason(u_int16_t reason) { if (!vflag) return; switch (reason) { case IEEE80211_REASON_UNSPECIFIED: printf(", unspecified failure"); break; case IEEE80211_REASON_AUTH_EXPIRE: printf(", authentication expired"); break; case IEEE80211_REASON_AUTH_LEAVE: printf(", deauth - station left"); break; case IEEE80211_REASON_ASSOC_EXPIRE: printf(", association expired"); break; case IEEE80211_REASON_ASSOC_TOOMANY: printf(", too many associated stations"); break; case IEEE80211_REASON_NOT_AUTHED: printf(", not authenticated"); break; case IEEE80211_REASON_NOT_ASSOCED: printf(", not associated"); break; case IEEE80211_REASON_ASSOC_LEAVE: printf(", disassociated - station left"); break; case IEEE80211_REASON_ASSOC_NOT_AUTHED: printf(", association but not authenticated"); break; case IEEE80211_REASON_RSN_REQUIRED: printf(", rsn required"); break; case IEEE80211_REASON_RSN_INCONSISTENT: printf(", rsn inconsistent"); break; case IEEE80211_REASON_IE_INVALID: printf(", ie invalid"); break; case IEEE80211_REASON_MIC_FAILURE: printf(", mic failure"); break; default: printf(", unknown reason %u", reason); } }