/*
- * Copyright (c) 2001
+ * Copyright (c) 2001
* Fortress Technologies, Inc. All rights reserved.
*
*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-802_11.c,v 1.3 2001-06-14 09:50:02 guy Exp $ (LBL)";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-802_11.c,v 1.31.2.10 2005-11-13 20:23:09 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
+#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <pcap.h>
#include "extract.h"
+#include "cpack.h"
+
#include "ieee802_11.h"
+#include "ieee802_11_radio.h"
+
+#define PRINT_SSID(p) \
+ switch (p.ssid_status) { \
+ case TRUNCATED: \
+ return 0; \
+ case PRESENT: \
+ printf(" ("); \
+ fn_print(p.ssid.ssid, NULL); \
+ printf(")"); \
+ break; \
+ case NOT_PRESENT: \
+ break; \
+ }
+
+#define PRINT_RATE(_sep, _r, _suf) \
+ printf("%s%2.1f%s", _sep, (.5 * ((_r) & 0x7f)), _suf)
+#define PRINT_RATES(p) \
+ switch (p.rates_status) { \
+ case TRUNCATED: \
+ return 0; \
+ case PRESENT: \
+ do { \
+ int z; \
+ const char *sep = " ["; \
+ for (z = 0; z < p.rates.length ; z++) { \
+ PRINT_RATE(sep, p.rates.rate[z], \
+ (p.rates.rate[z] & 0x80 ? "*" : "")); \
+ sep = " "; \
+ } \
+ if (p.rates.length != 0) \
+ printf(" Mbit]"); \
+ } while (0); \
+ break; \
+ case NOT_PRESENT: \
+ break; \
+ }
-#define RATEStoBUF(p,buf) { int z=0; for (z=0 ; z < p.rates.length ; z++) \
- sprintf(buf,"%s %2.1f",buf, (.5 * (p.rates.rate[z] & 0x7f))); }
+#define PRINT_DS_CHANNEL(p) \
+ switch (p.ds_status) { \
+ case TRUNCATED: \
+ return 0; \
+ case PRESENT: \
+ printf(" CH: %u", p.ds.channel); \
+ break; \
+ case NOT_PRESENT: \
+ break; \
+ } \
+ printf("%s", \
+ CAPABILITY_PRIVACY(p.capability_info) ? ", PRIVACY" : "" );
static const char *auth_alg_text[]={"Open System","Shared Key","EAP"};
-static const char *subtype_text[]={
- "Assoc Request",
- "Assoc Response",
- "ReAssoc Request",
- "ReAssoc Response",
- "Probe Request",
- "Probe Response",
- "RESERVED",
- "RESERVED",
- "Beacon",
- "ATIM",
- "Disassociation",
- "Authentication",
- "DeAuthentication",
- "RESERVED",
- "RESERVED"
+#define NUM_AUTH_ALGS (sizeof auth_alg_text / sizeof auth_alg_text[0])
+
+static const char *status_text[] = {
+ "Succesful", /* 0 */
+ "Unspecified failure", /* 1 */
+ "Reserved", /* 2 */
+ "Reserved", /* 3 */
+ "Reserved", /* 4 */
+ "Reserved", /* 5 */
+ "Reserved", /* 6 */
+ "Reserved", /* 7 */
+ "Reserved", /* 8 */
+ "Reserved", /* 9 */
+ "Cannot Support all requested capabilities in the Capability Information field", /* 10 */
+ "Reassociation denied due to inability to confirm that association exists", /* 11 */
+ "Association denied due to reason outside the scope of the standard", /* 12 */
+ "Responding station does not support the specified authentication algorithm ", /* 13 */
+ "Received an Authentication frame with authentication transaction " \
+ "sequence number out of expected sequence", /* 14 */
+ "Authentication rejected because of challenge failure", /* 15 */
+ "Authentication rejected due to timeout waiting for next frame in sequence", /* 16 */
+ "Association denied because AP is unable to handle additional associated stations", /* 17 */
+ "Association denied due to requesting station not supporting all of the " \
+ "data rates in BSSBasicRateSet parameter", /* 18 */
};
+#define NUM_STATUSES (sizeof status_text / sizeof status_text[0])
+
+static const char *reason_text[] = {
+ "Reserved", /* 0 */
+ "Unspecified reason", /* 1 */
+ "Previous authentication no longer valid", /* 2 */
+ "Deauthenticated because sending station is leaving (or has left) IBSS or ESS", /* 3 */
+ "Disassociated due to inactivity", /* 4 */
+ "Disassociated because AP is unable to handle all currently associated stations", /* 5 */
+ "Class 2 frame received from nonauthenticated station", /* 6 */
+ "Class 3 frame received from nonassociated station", /* 7 */
+ "Disassociated because sending station is leaving (or has left) BSS", /* 8 */
+ "Station requesting (re)association is not authenticated with responding station", /* 9 */
+};
+#define NUM_REASONS (sizeof reason_text / sizeof reason_text[0])
-static const char *status_text[]={"Succesful", /* 0 */
- "Unspecified failure", /* 1 */
- "Reserved", /* 2 */
- "Reserved", /* 3 */
- "Reserved", /* 4 */
- "Reserved", /* 5 */
- "Reserved", /* 6 */
- "Reserved", /* 7 */
- "Reserved", /* 8 */
- "Reserved", /* 9 */
- "Cannot Support all requested capabilities in the Capability Information field", /* 10 */
- "Reassociation denied due to inability to confirm that association exists", /* 11 */
- "Association denied due to reason outside the scope of the standard", /* 12 */
- "Responding station does not support the specified authentication algorithm ", /* 13 */
- "Received an Authentication frame with authentication transaction " \
- "sequence number out of expected sequence", /* 14 */
- "Authentication rejected because of challenge failure", /* 15 */
- "Authentication rejected due to timeout waiting for next frame in sequence", /* 16 */
- "Association denied because AP is unable to handle additional associated stations", /* 17 */
- "Association denied due to requesting station not supporting all of the " \
- "data rates in BSSBasicRateSet parameter", /* 18 */
- NULL };
-
-static const char *reason_text[]= { "Reserved", /* 0 */
- "Unspecified reason", /* 1 */
- "Previous authentication no longer valid", /* 2 */
- "Deauthenticated because sending station is leaving (or has left) IBSS or ESS", /* 3 */
- "Disassociated due to inactivity", /* 4 */
- "Disassociated because AP is unable to handle all currently associated stations", /* 5 */
- "Class 2 frame receivedfrom nonauthenticated station", /* 6 */
- "Class 3 frame received from nonassociated station", /* 7 */
- "Disassociated because sending station is leaving (or has left) BSS", /* 8 */
- "Station requesting (re)association is not authenticated with responding station", /* 9 */
- NULL };
-
-static int wep_print(const u_char *p,u_int length)
+static int
+wep_print(const u_char *p)
{
u_int32_t iv;
- if (!TTEST2(*p, 4))
+ if (!TTEST2(*p, IEEE802_11_IV_LEN + IEEE802_11_KID_LEN))
return 0;
iv = EXTRACT_LE_32BITS(p);
return 1;
}
+static void
+parse_elements(struct mgmt_body_t *pbody, const u_char *p, int offset)
+{
+ /*
+ * We haven't seen any elements yet.
+ */
+ pbody->challenge_status = NOT_PRESENT;
+ pbody->ssid_status = NOT_PRESENT;
+ pbody->rates_status = NOT_PRESENT;
+ pbody->ds_status = NOT_PRESENT;
+ pbody->cf_status = NOT_PRESENT;
+ pbody->tim_status = NOT_PRESENT;
-static int parse_elements(struct mgmt_body_t *pbody,const u_char *p,int offset)
-{
for (;;) {
- if (!TTEST2(*(p+offset), 1))
- return 0;
- if (*(p+offset) == 0xff)
+ if (!TTEST2(*(p + offset), 1))
+ return;
+ switch (*(p + offset)) {
+ case E_SSID:
+ /* Present, possibly truncated */
+ pbody->ssid_status = TRUNCATED;
+ if (!TTEST2(*(p + offset), 2))
+ return;
+ memcpy(&pbody->ssid, p + offset, 2);
+ offset += 2;
+ if (pbody->ssid.length != 0) {
+ if (pbody->ssid.length >
+ sizeof(pbody->ssid.ssid) - 1)
+ return;
+ if (!TTEST2(*(p + offset), pbody->ssid.length))
+ return;
+ memcpy(&pbody->ssid.ssid, p + offset,
+ pbody->ssid.length);
+ offset += pbody->ssid.length;
+ }
+ pbody->ssid.ssid[pbody->ssid.length] = '\0';
+ /* Present and not truncated */
+ pbody->ssid_status = PRESENT;
break;
- switch (*(p+offset))
- {
- case E_SSID:
- if (!TTEST2(*(p+offset), 2))
- return 0;
- memcpy(&(pbody->ssid),p+offset,2); offset += 2;
- if (pbody->ssid.length > 0)
- {
- if (!TTEST2(*(p+offset), pbody->ssid.length))
- return 0;
- memcpy(&(pbody->ssid.ssid),p+offset,pbody->ssid.length); offset += pbody->ssid.length;
- pbody->ssid.ssid[pbody->ssid.length]='\0';
- }
- break;
- case E_CHALLENGE:
- if (!TTEST2(*(p+offset), 2))
- return 0;
- memcpy(&(pbody->challenge),p+offset,2); offset += 2;
- if (pbody->challenge.length > 0)
- {
- if (!TTEST2(*(p+offset), pbody->challenge.length))
- return 0;
- memcpy(&(pbody->challenge.text),p+offset,pbody->challenge.length); offset += pbody->challenge.length;
- pbody->challenge.text[pbody->challenge.length]='\0';
- }
- break;
- case E_RATES:
- if (!TTEST2(*(p+offset), 2))
- return 0;
- memcpy(&(pbody->rates),p+offset,2); offset += 2;
- if (pbody->rates.length > 0) {
- if (!TTEST2(*(p+offset), pbody->rates.length))
- return 0;
- memcpy(&(pbody->rates.rate),p+offset,pbody->rates.length); offset += pbody->rates.length;
- }
- break;
- case E_DS:
- if (!TTEST2(*(p+offset), 3))
- return 0;
- memcpy(&(pbody->ds),p+offset,3); offset +=3;
- break;
- case E_CF:
- if (!TTEST2(*(p+offset), 8))
- return 0;
- memcpy(&(pbody->cf),p+offset,8); offset +=8;
- break;
- case E_TIM:
- if (!TTEST2(*(p+offset), 2))
- return 0;
- memcpy(&(pbody->tim),p+offset,2); offset +=2;
- if (!TTEST2(*(p+offset), 3))
- return 0;
- memcpy(&(pbody->tim.count),p+offset,3); offset +=3;
-
- if ((pbody->tim.length -3) > 0)
- {
- if (!TTEST2(*(p+offset), pbody->tim.length -3))
- return 0;
- memcpy((pbody->tim.bitmap),p+(pbody->tim.length -3),(pbody->tim.length -3));
- offset += pbody->tim.length -3;
- }
-
+ case E_CHALLENGE:
+ /* Present, possibly truncated */
+ pbody->challenge_status = TRUNCATED;
+ if (!TTEST2(*(p + offset), 2))
+ return;
+ memcpy(&pbody->challenge, p + offset, 2);
+ offset += 2;
+ if (pbody->challenge.length != 0) {
+ if (pbody->challenge.length >
+ sizeof(pbody->challenge.text) - 1)
+ return;
+ if (!TTEST2(*(p + offset), pbody->challenge.length))
+ return;
+ memcpy(&pbody->challenge.text, p + offset,
+ pbody->challenge.length);
+ offset += pbody->challenge.length;
+ }
+ pbody->challenge.text[pbody->challenge.length] = '\0';
+ /* Present and not truncated */
+ pbody->challenge_status = PRESENT;
+ break;
+ case E_RATES:
+ /* Present, possibly truncated */
+ pbody->rates_status = TRUNCATED;
+ if (!TTEST2(*(p + offset), 2))
+ return;
+ memcpy(&(pbody->rates), p + offset, 2);
+ offset += 2;
+ if (pbody->rates.length != 0) {
+ if (pbody->rates.length > sizeof pbody->rates.rate)
+ return;
+ if (!TTEST2(*(p + offset), pbody->rates.length))
+ return;
+ memcpy(&pbody->rates.rate, p + offset,
+ pbody->rates.length);
+ offset += pbody->rates.length;
+ }
+ /* Present and not truncated */
+ pbody->rates_status = PRESENT;
+ break;
+ case E_DS:
+ /* Present, possibly truncated */
+ pbody->ds_status = TRUNCATED;
+ if (!TTEST2(*(p + offset), 3))
+ return;
+ memcpy(&pbody->ds, p + offset, 3);
+ offset += 3;
+ /* Present and not truncated */
+ pbody->ds_status = PRESENT;
+ break;
+ case E_CF:
+ /* Present, possibly truncated */
+ pbody->cf_status = TRUNCATED;
+ if (!TTEST2(*(p + offset), 8))
+ return;
+ memcpy(&pbody->cf, p + offset, 8);
+ offset += 8;
+ /* Present and not truncated */
+ pbody->cf_status = PRESENT;
+ break;
+ case E_TIM:
+ /* Present, possibly truncated */
+ pbody->tim_status = TRUNCATED;
+ if (!TTEST2(*(p + offset), 2))
+ return;
+ memcpy(&pbody->tim, p + offset, 2);
+ offset += 2;
+ if (!TTEST2(*(p + offset), 3))
+ return;
+ memcpy(&pbody->tim.count, p + offset, 3);
+ offset += 3;
+
+ if (pbody->tim.length <= 3)
break;
- default:
+ if (pbody->rates.length > sizeof pbody->tim.bitmap)
+ return;
+ if (!TTEST2(*(p + offset), pbody->tim.length - 3))
+ return;
+ memcpy(pbody->tim.bitmap, p + (pbody->tim.length - 3),
+ (pbody->tim.length - 3));
+ offset += pbody->tim.length - 3;
+ /* Present and not truncated */
+ pbody->tim_status = PRESENT;
+ break;
+ default:
#if 0
- printf("(1) unhandled element_id (%d) ", *(p+offset) );
+ printf("(1) unhandled element_id (%d) ",
+ *(p + offset) );
#endif
- offset+= *(p+offset+1) + 2;
- break;
+ if (!TTEST2(*(p + offset), 2))
+ return;
+ if (!TTEST2(*(p + offset + 2), *(p + offset + 1)))
+ return;
+ offset += *(p + offset + 1) + 2;
+ break;
}
}
- return 1;
}
/*********************************************************************************
* Print Handle functions for the management frame types
*********************************************************************************/
-static int handle_beacon(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_beacon(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
- char buf[128];
+ int offset = 0;
- memset(buf,0,128);
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
- if (!TTEST2(*p, 12))
+ if (!TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
+ IEEE802_11_CAPINFO_LEN))
return 0;
- memcpy(&pbody.timestamp,p,8);
- offset += 8;
+ memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
+ offset += IEEE802_11_TSTAMP_LEN;
pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
+ offset += IEEE802_11_BCNINT_LEN;
pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
+ offset += IEEE802_11_CAPINFO_LEN;
- if (!parse_elements(&pbody,p,offset))
- return 0;
+ parse_elements(&pbody, p, offset);
- RATEStoBUF(pbody,buf);
+ PRINT_SSID(pbody);
+ PRINT_RATES(pbody);
+ printf(" %s",
+ CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS");
+ PRINT_DS_CHANNEL(pbody);
- printf("%s (%s) [%s Mbit] %s CH: %x %s",
- subtype_text[FC_SUBTYPE(fc)],
- pbody.ssid.ssid,buf,CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS" ,pbody.ds.channel,
- CAPABILITY_PRIVACY(pbody.capability_info) ? ", PRIVACY" : "" );
-
return 1;
}
-static int handle_assoc_request(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_assoc_request(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
- char buf[128];
+ int offset = 0;
- memset(buf,0,128);
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
- if (!TTEST2(*p, 4))
+ if (!TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN))
return 0;
pbody.capability_info = EXTRACT_LE_16BITS(p);
- offset += 2;
+ offset += IEEE802_11_CAPINFO_LEN;
pbody.listen_interval = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
-
- if (!parse_elements(&pbody,p,offset))
- return 0;
+ offset += IEEE802_11_LISTENINT_LEN;
- RATEStoBUF(pbody,buf);
+ parse_elements(&pbody, p, offset);
- printf("%s (%s) [%s Mbit] ", subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid,buf);
+ PRINT_SSID(pbody);
+ PRINT_RATES(pbody);
return 1;
}
-static int handle_assoc_response(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_assoc_response(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
+ int offset = 0;
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
- if (!TTEST2(*p, 6))
+ if (!TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN +
+ IEEE802_11_AID_LEN))
return 0;
pbody.capability_info = EXTRACT_LE_16BITS(p);
- offset += 2;
+ offset += IEEE802_11_CAPINFO_LEN;
pbody.status_code = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
+ offset += IEEE802_11_STATUS_LEN;
pbody.aid = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
+ offset += IEEE802_11_AID_LEN;
- if (!parse_elements(&pbody,p,offset))
- return 0;
+ parse_elements(&pbody, p, offset);
- printf("%s AID(%x) :%s: %s ",subtype_text[FC_SUBTYPE(fc)],
- ((u_int16_t)( pbody.aid << 2 )) >> 2 ,
- CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "" ,
- (pbody.status_code < 19 ? status_text[pbody.status_code] : "n/a") );
+ printf(" AID(%x) :%s: %s", ((u_int16_t)(pbody.aid << 2 )) >> 2 ,
+ CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "",
+ (pbody.status_code < NUM_STATUSES
+ ? status_text[pbody.status_code]
+ : "n/a"));
return 1;
}
-
-static int handle_reassoc_request(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_reassoc_request(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
+ int offset = 0;
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
- if (!TTEST2(*p, 10))
+ if (!TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN +
+ IEEE802_11_AP_LEN))
return 0;
pbody.capability_info = EXTRACT_LE_16BITS(p);
- offset += 2;
+ offset += IEEE802_11_CAPINFO_LEN;
pbody.listen_interval = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
- memcpy(&pbody.ap,p+offset,6);
- offset += 6;
+ offset += IEEE802_11_LISTENINT_LEN;
+ memcpy(&pbody.ap, p+offset, IEEE802_11_AP_LEN);
+ offset += IEEE802_11_AP_LEN;
- if (!parse_elements(&pbody,p,offset))
- return 0;
+ parse_elements(&pbody, p, offset);
+
+ PRINT_SSID(pbody);
+ printf(" AP : %s", etheraddr_string( pbody.ap ));
- printf("%s (%s) AP : %s",subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid, etheraddr_string( pbody.ap ));
-
return 1;
}
-static int handle_reassoc_response(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_reassoc_response(const u_char *p)
{
/* Same as a Association Reponse */
- return handle_assoc_response(fc,pmh,p);
+ return handle_assoc_response(p);
}
-static int handle_probe_request(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_probe_request(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
- char buf[128];
+ int offset = 0;
- memset(buf,0,128);
+ memset(&pbody, 0, sizeof(pbody));
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ parse_elements(&pbody, p, offset);
- if (!parse_elements(&pbody,p,offset))
- return 0;
-
- RATEStoBUF(pbody,buf);
-
- printf("%s (%s) [%s Mbit] ",subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid,buf);
+ PRINT_SSID(pbody);
+ PRINT_RATES(pbody);
return 1;
}
-static int handle_probe_response(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_probe_response(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
- char buf[128];
+ int offset = 0;
- memset(buf,0,128);
+ memset(&pbody, 0, sizeof(pbody));
- memset(&pbody,0,sizeof(struct mgmt_body_t));
-
- if (!TTEST2(*p, 12))
+ if (!TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
+ IEEE802_11_CAPINFO_LEN))
return 0;
- memcpy(&pbody.timestamp,p,8);
- offset += 8;
+
+ memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
+ offset += IEEE802_11_TSTAMP_LEN;
pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
+ offset += IEEE802_11_BCNINT_LEN;
pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
- offset += 2;
-
- if (!parse_elements(&pbody,p,offset))
- return 0;
+ offset += IEEE802_11_CAPINFO_LEN;
- printf("%s (%s) CH: %x %s",subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid,pbody.ds.channel,
- CAPABILITY_PRIVACY(pbody.capability_info) ? ",PRIVACY " : "" );
+ parse_elements(&pbody, p, offset);
+
+ PRINT_SSID(pbody);
+ PRINT_RATES(pbody);
+ PRINT_DS_CHANNEL(pbody);
return 1;
}
-static int handle_atim(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_atim(void)
{
/* the frame body for ATIM is null. */
- printf("ATIM");
return 1;
}
-static int handle_disassoc(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_disassoc(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
- if (!TTEST2(*p, 2))
+ if (!TTEST2(*p, IEEE802_11_REASON_LEN))
return 0;
pbody.reason_code = EXTRACT_LE_16BITS(p);
- offset += 2;
- printf("%s: %s ", subtype_text[FC_SUBTYPE(fc)],
- pbody.reason_code < 10 ? reason_text[pbody.reason_code] : "Reserved" );
+ printf(": %s",
+ (pbody.reason_code < NUM_REASONS)
+ ? reason_text[pbody.reason_code]
+ : "Reserved" );
return 1;
}
-static int handle_auth(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_auth(const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
+ int offset = 0;
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
if (!TTEST2(*p, 6))
return 0;
pbody.auth_alg = EXTRACT_LE_16BITS(p);
offset += 2;
- pbody.auth_trans_seq_num = EXTRACT_LE_16BITS(p+offset);
+ pbody.auth_trans_seq_num = EXTRACT_LE_16BITS(p + offset);
offset += 2;
- pbody.status_code = EXTRACT_LE_16BITS(p+offset);
+ pbody.status_code = EXTRACT_LE_16BITS(p + offset);
offset += 2;
- if (!parse_elements(&pbody,p,offset))
- return 0;
-
- if (( pbody.auth_alg == 1) &&
- ( ( pbody.auth_trans_seq_num == 2) || (pbody.auth_trans_seq_num == 3) ))
- {
- printf("%s (%s)-%x [Challenge Text] %s",
- subtype_text[FC_SUBTYPE(fc)],
- pbody.auth_alg < 4 ? auth_alg_text[pbody.auth_alg] : "Reserved" ,
- pbody.auth_trans_seq_num,
- ((pbody.auth_trans_seq_num % 2) ?
- (pbody.status_code < 19 ? status_text[pbody.status_code] : "n/a") : "" )
- );
- }
- else
- {
- printf("%s (%s)-%x: %s",
- subtype_text[FC_SUBTYPE(fc)],
- pbody.auth_alg < 4 ? auth_alg_text[pbody.auth_alg] : "Reserved" ,
- pbody.auth_trans_seq_num,
- ( (pbody.auth_trans_seq_num % 2) ?
- (pbody.status_code < 19 ? status_text[pbody.status_code] : "n/a") : "")
- );
+ parse_elements(&pbody, p, offset);
+
+ if ((pbody.auth_alg == 1) &&
+ ((pbody.auth_trans_seq_num == 2) ||
+ (pbody.auth_trans_seq_num == 3))) {
+ printf(" (%s)-%x [Challenge Text] %s",
+ (pbody.auth_alg < NUM_AUTH_ALGS)
+ ? auth_alg_text[pbody.auth_alg]
+ : "Reserved",
+ pbody.auth_trans_seq_num,
+ ((pbody.auth_trans_seq_num % 2)
+ ? ((pbody.status_code < NUM_STATUSES)
+ ? status_text[pbody.status_code]
+ : "n/a") : ""));
+ return 1;
}
+ printf(" (%s)-%x: %s",
+ (pbody.auth_alg < NUM_AUTH_ALGS)
+ ? auth_alg_text[pbody.auth_alg]
+ : "Reserved",
+ pbody.auth_trans_seq_num,
+ (pbody.auth_trans_seq_num % 2)
+ ? ((pbody.status_code < NUM_STATUSES)
+ ? status_text[pbody.status_code]
+ : "n/a")
+ : "");
return 1;
}
-static int handle_deauth(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p)
+static int
+handle_deauth(const struct mgmt_header_t *pmh, const u_char *p)
{
struct mgmt_body_t pbody;
- int offset=0;
+ int offset = 0;
+ const char *reason = NULL;
- memset(&pbody,0,sizeof(struct mgmt_body_t));
+ memset(&pbody, 0, sizeof(pbody));
- if (!TTEST2(*p, 2))
+ if (!TTEST2(*p, IEEE802_11_REASON_LEN))
return 0;
pbody.reason_code = EXTRACT_LE_16BITS(p);
- offset += 2;
-
- if (eflag)
- {
- printf("%s: %s",
- subtype_text[FC_SUBTYPE(fc)],
- pbody.reason_code < 10 ? reason_text[pbody.reason_code] : "Reserved" );
- }
- else
- {
- printf("%s (%s): %s",
- subtype_text[FC_SUBTYPE(fc)],
- etheraddr_string(pmh->sa),
- pbody.reason_code < 10 ? reason_text[pbody.reason_code] : "Reserved" );
+ offset += IEEE802_11_REASON_LEN;
+
+ reason = (pbody.reason_code < NUM_REASONS)
+ ? reason_text[pbody.reason_code]
+ : "Reserved";
+
+ if (eflag) {
+ printf(": %s", reason);
+ } else {
+ printf(" (%s): %s", etheraddr_string(pmh->sa), reason);
}
-
return 1;
}
*********************************************************************************/
-static int mgmt_body_print(u_int16_t fc, const struct mgmt_header_t *pmh,
- const u_char *p, u_int length)
+static int
+mgmt_body_print(u_int16_t fc, const struct mgmt_header_t *pmh,
+ const u_char *p)
{
- switch (FC_SUBTYPE(fc))
- {
- case ST_ASSOC_REQUEST:
- return (handle_assoc_request(fc,pmh,p));
- case ST_ASSOC_RESPONSE:
- return (handle_assoc_response(fc,pmh,p));
- case ST_REASSOC_REQUEST:
- return (handle_reassoc_request(fc,pmh,p));
- case ST_REASSOC_RESPONSE:
- return (handle_reassoc_response(fc,pmh,p));
- case ST_PROBE_REQUEST:
- return (handle_probe_request(fc,pmh,p));
- case ST_PROBE_RESPONSE:
- return (handle_probe_response(fc,pmh,p));
- case ST_BEACON:
- return (handle_beacon(fc,pmh,p));
- case ST_ATIM:
- return (handle_atim(fc,pmh,p));
- case ST_DISASSOC:
- return (handle_disassoc(fc,pmh,p));
- case ST_AUTH:
- if (!TTEST2(*p, 3))
- return 0;
- if ((p[0] == 0 ) && (p[1] == 0) && (p[2] == 0))
- {
- printf("Authentication (Shared-Key)-3 ");
- return (wep_print(p,length));
- }
- else
- return (handle_auth(fc,pmh,p));
- case ST_DEAUTH:
- return (handle_deauth(fc,pmh,p));
- break;
- default:
- printf("Unhandled Managment subtype(%x)",
- FC_SUBTYPE(fc));
- return 1;
+ switch (FC_SUBTYPE(fc)) {
+ case ST_ASSOC_REQUEST:
+ printf("Assoc Request");
+ return handle_assoc_request(p);
+ case ST_ASSOC_RESPONSE:
+ printf("Assoc Response");
+ return handle_assoc_response(p);
+ case ST_REASSOC_REQUEST:
+ printf("ReAssoc Request");
+ return handle_reassoc_request(p);
+ case ST_REASSOC_RESPONSE:
+ printf("ReAssoc Response");
+ return handle_reassoc_response(p);
+ case ST_PROBE_REQUEST:
+ printf("Probe Request");
+ return handle_probe_request(p);
+ case ST_PROBE_RESPONSE:
+ printf("Probe Response");
+ return handle_probe_response(p);
+ case ST_BEACON:
+ printf("Beacon");
+ return handle_beacon(p);
+ case ST_ATIM:
+ printf("ATIM");
+ return handle_atim();
+ case ST_DISASSOC:
+ printf("Disassociation");
+ return handle_disassoc(p);
+ case ST_AUTH:
+ printf("Authentication");
+ if (!TTEST2(*p, 3))
+ return 0;
+ if ((p[0] == 0 ) && (p[1] == 0) && (p[2] == 0)) {
+ printf("Authentication (Shared-Key)-3 ");
+ return wep_print(p);
+ }
+ return handle_auth(p);
+ case ST_DEAUTH:
+ printf("DeAuthentication");
+ return handle_deauth(pmh, p);
+ break;
+ default:
+ printf("Unhandled Management subtype(%x)",
+ FC_SUBTYPE(fc));
+ return 1;
}
}
* Handles printing all the control frame types
*********************************************************************************/
-static int ctrl_body_print(u_int16_t fc,const u_char *p, u_int length)
+static int
+ctrl_body_print(u_int16_t fc, const u_char *p)
{
- switch (FC_SUBTYPE(fc))
- {
- case CTRL_PS_POLL:
- if (!TTEST2(*p, CTRL_PS_POLL_LEN))
- return 0;
- printf("Power Save-Poll AID(%x)",
- EXTRACT_LE_16BITS(&(((struct ctrl_ps_poll_t *)p)->aid)));
- break;
- case CTRL_RTS:
- if (!TTEST2(*p, CTRL_RTS_LEN))
- return 0;
- if (eflag)
- printf("Request-To-Send");
- else
- printf("Request-To-Send TA:%s ", etheraddr_string( ((struct ctrl_rts_t *)p)->ta));
- break;
- case CTRL_CTS:
- if (!TTEST2(*p, CTRL_CTS_LEN))
- return 0;
- if (eflag)
- printf("Clear-To-Send");
- else
- printf("Clear-To-Send RA:%s ", etheraddr_string( ((struct ctrl_cts_t *)p)->ra));
- break;
- case CTRL_ACK:
- if (!TTEST2(*p, CTRL_ACK_LEN))
- return 0;
- if (eflag)
- printf("Acknowledgment");
- else
- printf("Acknowledgment RA:%s ", etheraddr_string( ((struct ctrl_ack_t *)p)->ra));
- break;
- case CTRL_CF_END:
- if (!TTEST2(*p, CTRL_END_LEN))
- return 0;
- if (eflag)
- printf("CF-End");
- else
- printf("CF-End RA:%s ", etheraddr_string( ((struct ctrl_end_t *)p)->ra));
- break;
- case CTRL_END_ACK:
- if (!TTEST2(*p, CTRL_END_ACK_LEN))
- return 0;
- if (eflag)
- printf("CF-End+CF-Ack");
- else
- printf("CF-End+CF-Ack RA:%s ", etheraddr_string( ((struct ctrl_end_ack_t *)p)->ra));
- break;
- default:
- printf("(B) Unknown Ctrl Subtype");
+ switch (FC_SUBTYPE(fc)) {
+ case CTRL_PS_POLL:
+ printf("Power Save-Poll");
+ if (!TTEST2(*p, CTRL_PS_POLL_HDRLEN))
+ return 0;
+ printf(" AID(%x)",
+ EXTRACT_LE_16BITS(&(((const struct ctrl_ps_poll_t *)p)->aid)));
+ break;
+ case CTRL_RTS:
+ printf("Request-To-Send");
+ if (!TTEST2(*p, CTRL_RTS_HDRLEN))
+ return 0;
+ if (!eflag)
+ printf(" TA:%s ",
+ etheraddr_string(((const struct ctrl_rts_t *)p)->ta));
+ break;
+ case CTRL_CTS:
+ printf("Clear-To-Send");
+ if (!TTEST2(*p, CTRL_CTS_HDRLEN))
+ return 0;
+ if (!eflag)
+ printf(" RA:%s ",
+ etheraddr_string(((const struct ctrl_cts_t *)p)->ra));
+ break;
+ case CTRL_ACK:
+ printf("Acknowledgment");
+ if (!TTEST2(*p, CTRL_ACK_HDRLEN))
+ return 0;
+ if (!eflag)
+ printf(" RA:%s ",
+ etheraddr_string(((const struct ctrl_ack_t *)p)->ra));
+ break;
+ case CTRL_CF_END:
+ printf("CF-End");
+ if (!TTEST2(*p, CTRL_END_HDRLEN))
+ return 0;
+ if (!eflag)
+ printf(" RA:%s ",
+ etheraddr_string(((const struct ctrl_end_t *)p)->ra));
+ break;
+ case CTRL_END_ACK:
+ printf("CF-End+CF-Ack");
+ if (!TTEST2(*p, CTRL_END_ACK_HDRLEN))
+ return 0;
+ if (!eflag)
+ printf(" RA:%s ",
+ etheraddr_string(((const struct ctrl_end_ack_t *)p)->ra));
+ break;
+ default:
+ printf("Unknown Ctrl Subtype");
}
return 1;
}
-
-
-/*********************************************************************************
+/*
* Print Header funcs
- *********************************************************************************/
+ */
-/*********************************************************************************
+/*
* Data Frame - Address field contents
*
* To Ds | From DS | Addr 1 | Addr 2 | Addr 3 | Addr 4
* 0 | 1 | DA | BSSID | SA | n/a
* 1 | 0 | BSSID | SA | DA | n/a
* 1 | 1 | RA | TA | DA | SA
- *********************************************************************************/
-
-#define ADDR1 p+4
-#define ADDR2 p+10
-#define ADDR3 p+16
-#define ADDR4 p+24
+ */
-static void data_header_print(u_int16_t fc,const u_char *p, u_int length)
+static void
+data_header_print(u_int16_t fc, const u_char *p, const u_int8_t **srcp,
+ const u_int8_t **dstp)
{
- if (!FC_TO_DS(fc))
- {
- if (!FC_FROM_DS(fc))
- printf("DA:%s SA:%s BSSID:%s ", etheraddr_string( ADDR1),
- etheraddr_string( ADDR2), etheraddr_string( ADDR3));
- else
- printf("DA:%s BSSID:%s SA:%s ", etheraddr_string( ADDR1),
- etheraddr_string( ADDR2), etheraddr_string( ADDR3));
+ switch (FC_SUBTYPE(fc)) {
+ case DATA_DATA:
+ case DATA_NODATA:
+ break;
+ case DATA_DATA_CF_ACK:
+ case DATA_NODATA_CF_ACK:
+ printf("CF Ack ");
+ break;
+ case DATA_DATA_CF_POLL:
+ case DATA_NODATA_CF_POLL:
+ printf("CF Poll ");
+ break;
+ case DATA_DATA_CF_ACK_POLL:
+ case DATA_NODATA_CF_ACK_POLL:
+ printf("CF Ack/Poll ");
+ break;
}
- else
- {
- if (!FC_FROM_DS(fc))
- printf("BSSID:%s SA:%s DA:%s ", etheraddr_string( ADDR1),
- etheraddr_string( ADDR2), etheraddr_string( ADDR3));
- else
- printf("RA:%s TA:%s DA:%s SA:%s ", etheraddr_string( ADDR1),
- etheraddr_string( ADDR2), etheraddr_string( ADDR3),
- etheraddr_string( ADDR4));
+
+#define ADDR1 (p + 4)
+#define ADDR2 (p + 10)
+#define ADDR3 (p + 16)
+#define ADDR4 (p + 24)
+
+ if (!FC_TO_DS(fc) && !FC_FROM_DS(fc)) {
+ if (srcp != NULL)
+ *srcp = ADDR2;
+ if (dstp != NULL)
+ *dstp = ADDR1;
+ if (!eflag)
+ return;
+ printf("DA:%s SA:%s BSSID:%s ",
+ etheraddr_string(ADDR1), etheraddr_string(ADDR2),
+ etheraddr_string(ADDR3));
+ } else if (!FC_TO_DS(fc) && FC_FROM_DS(fc)) {
+ if (srcp != NULL)
+ *srcp = ADDR3;
+ if (dstp != NULL)
+ *dstp = ADDR1;
+ if (!eflag)
+ return;
+ printf("DA:%s BSSID:%s SA:%s ",
+ etheraddr_string(ADDR1), etheraddr_string(ADDR2),
+ etheraddr_string(ADDR3));
+ } else if (FC_TO_DS(fc) && !FC_FROM_DS(fc)) {
+ if (srcp != NULL)
+ *srcp = ADDR2;
+ if (dstp != NULL)
+ *dstp = ADDR3;
+ if (!eflag)
+ return;
+ printf("BSSID:%s SA:%s DA:%s ",
+ etheraddr_string(ADDR1), etheraddr_string(ADDR2),
+ etheraddr_string(ADDR3));
+ } else if (FC_TO_DS(fc) && FC_FROM_DS(fc)) {
+ if (srcp != NULL)
+ *srcp = ADDR4;
+ if (dstp != NULL)
+ *dstp = ADDR3;
+ if (!eflag)
+ return;
+ printf("RA:%s TA:%s DA:%s SA:%s ",
+ etheraddr_string(ADDR1), etheraddr_string(ADDR2),
+ etheraddr_string(ADDR3), etheraddr_string(ADDR4));
}
-
-}
+#undef ADDR1
+#undef ADDR2
+#undef ADDR3
+#undef ADDR4
+}
-static void mgmt_header_print(const u_char *p, u_int length)
+static void
+mgmt_header_print(const u_char *p, const u_int8_t **srcp,
+ const u_int8_t **dstp)
{
- const struct mgmt_header_t *hp=(const struct mgmt_header_t *) p;
+ const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p;
+
+ if (srcp != NULL)
+ *srcp = hp->sa;
+ if (dstp != NULL)
+ *dstp = hp->da;
+ if (!eflag)
+ return;
+
+ printf("BSSID:%s DA:%s SA:%s ",
+ etheraddr_string((hp)->bssid), etheraddr_string((hp)->da),
+ etheraddr_string((hp)->sa));
+}
- printf("BSSID:%s DA:%s SA:%s ", etheraddr_string( (hp)->bssid),
- etheraddr_string( (hp)->da),
- etheraddr_string( (hp)->sa));
+static void
+ctrl_header_print(u_int16_t fc, const u_char *p, const u_int8_t **srcp,
+ const u_int8_t **dstp)
+{
+ if (srcp != NULL)
+ *srcp = NULL;
+ if (dstp != NULL)
+ *dstp = NULL;
+ if (!eflag)
+ return;
+
+ switch (FC_SUBTYPE(fc)) {
+ case CTRL_PS_POLL:
+ printf("BSSID:%s TA:%s ",
+ etheraddr_string(((const struct ctrl_ps_poll_t *)p)->bssid),
+ etheraddr_string(((const struct ctrl_ps_poll_t *)p)->ta));
+ break;
+ case CTRL_RTS:
+ printf("RA:%s TA:%s ",
+ etheraddr_string(((const struct ctrl_rts_t *)p)->ra),
+ etheraddr_string(((const struct ctrl_rts_t *)p)->ta));
+ break;
+ case CTRL_CTS:
+ printf("RA:%s ",
+ etheraddr_string(((const struct ctrl_cts_t *)p)->ra));
+ break;
+ case CTRL_ACK:
+ printf("RA:%s ",
+ etheraddr_string(((const struct ctrl_ack_t *)p)->ra));
+ break;
+ case CTRL_CF_END:
+ printf("RA:%s BSSID:%s ",
+ etheraddr_string(((const struct ctrl_end_t *)p)->ra),
+ etheraddr_string(((const struct ctrl_end_t *)p)->bssid));
+ break;
+ case CTRL_END_ACK:
+ printf("RA:%s BSSID:%s ",
+ etheraddr_string(((const struct ctrl_end_ack_t *)p)->ra),
+ etheraddr_string(((const struct ctrl_end_ack_t *)p)->bssid));
+ break;
+ default:
+ printf("(H) Unknown Ctrl Subtype");
+ break;
+ }
}
-static void ctrl_header_print(u_int16_t fc,const u_char *p, u_int length)
+static int
+extract_header_length(u_int16_t fc)
{
- switch (FC_SUBTYPE(fc))
- {
+ switch (FC_TYPE(fc)) {
+ case T_MGMT:
+ return MGMT_HDRLEN;
+ case T_CTRL:
+ switch (FC_SUBTYPE(fc)) {
case CTRL_PS_POLL:
- printf("BSSID:%s TA:%s ", etheraddr_string( ((struct ctrl_ps_poll_t *)p)->bssid),
- etheraddr_string( ((struct ctrl_ps_poll_t *)p)->ta));
- break;
+ return CTRL_PS_POLL_HDRLEN;
case CTRL_RTS:
- printf("RA:%s TA:%s ", etheraddr_string( ((struct ctrl_rts_t *)p)->ra),
- etheraddr_string( ((struct ctrl_rts_t *)p)->ta));
- break;
+ return CTRL_RTS_HDRLEN;
case CTRL_CTS:
- printf("RA:%s ", etheraddr_string( ((struct ctrl_cts_t *)p)->ra));
- break;
+ return CTRL_CTS_HDRLEN;
case CTRL_ACK:
- printf("RA:%s ", etheraddr_string( ((struct ctrl_ack_t *)p)->ra));
- break;
+ return CTRL_ACK_HDRLEN;
case CTRL_CF_END:
- printf("RA:%s BSSID:%s ", etheraddr_string( ((struct ctrl_end_t *)p)->ra),
- etheraddr_string( ((struct ctrl_end_t *)p)->bssid));
- break;
+ return CTRL_END_HDRLEN;
case CTRL_END_ACK:
- printf("RA:%s BSSID:%s ", etheraddr_string( ((struct ctrl_end_ack_t *)p)->ra),
- etheraddr_string( ((struct ctrl_end_ack_t *)p)->bssid));
- break;
+ return CTRL_END_ACK_HDRLEN;
default:
- printf("(H) Unknown Ctrl Subtype");
+ return 0;
+ }
+ case T_DATA:
+ return (FC_TO_DS(fc) && FC_FROM_DS(fc)) ? 30 : 24;
+ default:
+ printf("unknown IEEE802.11 frame type (%d)", FC_TYPE(fc));
+ return 0;
}
}
-static int GetHeaderLength(u_int16_t fc)
-{
- int iLength=0;
-
- switch (FC_TYPE(fc))
- {
- case T_MGMT:
- iLength=MGMT_HEADER_LEN;
- break;
- case T_CTRL:
- switch (FC_SUBTYPE(fc))
- {
- case CTRL_PS_POLL:
- iLength=CTRL_PS_POLL_LEN;
- break;
- case CTRL_RTS:
- iLength=CTRL_RTS_LEN;
- break;
- case CTRL_CTS:
- iLength=CTRL_CTS_LEN;
- break;
- case CTRL_ACK:
- iLength=CTRL_ACK_LEN;
- break;
- case CTRL_CF_END:
- iLength=CTRL_END_LEN;
- break;
- case CTRL_END_ACK:
- iLength=CTRL_END_ACK_LEN;
- break;
- default:
- iLength=0;
- break;
- }
- break;
- case T_DATA:
- if (FC_TO_DS(fc) && FC_FROM_DS(fc))
- iLength=30;
- else
- iLength=24;
- break;
- default:
- printf("unknown IEEE802.11 frame type (%d)",
- FC_TYPE(fc));
- break;
- }
-
- return iLength;
-}
-
/*
- * Print the 802.11 MAC header
+ * Print the 802.11 MAC header if eflag is set, and set "*srcp" and "*dstp"
+ * to point to the source and destination MAC addresses in any case if
+ * "srcp" and "dstp" aren't null.
*/
static inline void
-ieee_802_11_print(u_int16_t fc, const u_char *p, u_int length)
+ieee_802_11_hdr_print(u_int16_t fc, const u_char *p, const u_int8_t **srcp,
+ const u_int8_t **dstp)
{
- switch (FC_TYPE(fc)) {
+ if (vflag) {
+ if (FC_MORE_DATA(fc))
+ printf("More Data ");
+ if (FC_MORE_FLAG(fc))
+ printf("More Fragments ");
+ if (FC_POWER_MGMT(fc))
+ printf("Pwr Mgmt ");
+ if (FC_RETRY(fc))
+ printf("Retry ");
+ if (FC_ORDER(fc))
+ printf("Strictly Ordered ");
+ if (FC_WEP(fc))
+ printf("WEP Encrypted ");
+ if (FC_TYPE(fc) != T_CTRL || FC_SUBTYPE(fc) != CTRL_PS_POLL)
+ printf("%dus ",
+ EXTRACT_LE_16BITS(
+ &((const struct mgmt_header_t *)p)->duration));
+ }
+ switch (FC_TYPE(fc)) {
case T_MGMT:
- mgmt_header_print(p,length);
+ mgmt_header_print(p, srcp, dstp);
break;
-
case T_CTRL:
- ctrl_header_print(fc,p,length);
+ ctrl_header_print(fc, p, srcp, dstp);
break;
-
case T_DATA:
- data_header_print(fc,p,length);
+ data_header_print(fc, p, srcp, dstp);
break;
-
default:
printf("(header) unknown IEEE802.11 frame type (%d)",
FC_TYPE(fc));
+ *srcp = NULL;
+ *dstp = NULL;
break;
}
}
-/*
- * This is the top level routine of the printer. 'p' is the points
- * to the ether header of the packet, 'h->tv' is the timestamp,
- * 'h->length' is the length of the packet off the wire, and 'h->caplen'
- * is the number of bytes actually captured.
- */
-void
-ieee802_11_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+static u_int
+ieee802_11_print(const u_char *p, u_int length, u_int caplen)
{
- u_int caplen = h->caplen;
- u_int length = h->len;
u_int16_t fc;
- u_int HEADER_LENGTH;
+ u_int hdrlen;
+ const u_int8_t *src, *dst;
u_short extracted_ethertype;
- ts_print(&h->ts);
-
if (caplen < IEEE802_11_FC_LEN) {
printf("[|802.11]");
- goto out;
+ return caplen;
}
- fc=EXTRACT_LE_16BITS(p);
+ fc = EXTRACT_LE_16BITS(p);
+ hdrlen = extract_header_length(fc);
- if (eflag)
- ieee_802_11_print(fc,p,length);
+ if (caplen < hdrlen) {
+ printf("[|802.11]");
+ return hdrlen;
+ }
+
+ ieee_802_11_hdr_print(fc, p, &src, &dst);
/*
- * Some printers want to get back at the ethernet addresses,
- * and/or check that they're not walking off the end of the packet.
- * Rather than pass them all the way down, we set these globals.
+ * Go past the 802.11 header.
*/
- packetp = p;
- snapend = p + caplen;
-
- HEADER_LENGTH=GetHeaderLength(fc);
-
- length -= HEADER_LENGTH;
- caplen -= HEADER_LENGTH;
- p += HEADER_LENGTH;
+ length -= hdrlen;
+ caplen -= hdrlen;
+ p += hdrlen;
switch (FC_TYPE(fc)) {
-
case T_MGMT:
- if (!mgmt_body_print(fc,(const struct mgmt_header_t *)packetp,p,length)) {
+ if (!mgmt_body_print(fc,
+ (const struct mgmt_header_t *)(p - hdrlen), p)) {
printf("[|802.11]");
- goto out;
+ return hdrlen;
}
break;
-
case T_CTRL:
- if (!ctrl_body_print(fc,p - HEADER_LENGTH,length + HEADER_LENGTH)) {
+ if (!ctrl_body_print(fc, p - hdrlen)) {
printf("[|802.11]");
- goto out;
+ return hdrlen;
}
break;
-
case T_DATA:
/* There may be a problem w/ AP not having this bit set */
- if (FC_WEP(fc)) {
- if (!wep_print(p,length)) {
+ if (FC_WEP(fc)) {
+ if (!wep_print(p)) {
printf("[|802.11]");
- goto out;
- }
- } else {
- if (llc_print(p, length, caplen, packetp+10,
- packetp+4, &extracted_ethertype) == 0) {
- /*
- * Some kinds of LLC packet we cannot
- * handle intelligently
- */
- if (!eflag)
- ieee_802_11_print(fc, p - HEADER_LENGTH,
- length + HEADER_LENGTH);
- if (extracted_ethertype) {
- printf("(LLC %s) ",
- etherproto_string(htons(extracted_ethertype)));
- }
- if (!xflag && !qflag)
- default_print(p, caplen);
+ return hdrlen;
}
+ } else if (llc_print(p, length, caplen, dst, src,
+ &extracted_ethertype) == 0) {
+ /*
+ * Some kinds of LLC packet we cannot
+ * handle intelligently
+ */
+ if (!eflag)
+ ieee_802_11_hdr_print(fc, p - hdrlen, NULL,
+ NULL);
+ if (extracted_ethertype)
+ printf("(LLC %s) ",
+ etherproto_string(
+ htons(extracted_ethertype)));
+ if (!suppress_default_print)
+ default_print(p, caplen);
}
break;
+ default:
+ printf("unknown 802.11 frame type (%d)", FC_TYPE(fc));
+ break;
+ }
+ return hdrlen;
+}
+
+/*
+ * This is the top level routine of the printer. 'p' points
+ * to the 802.11 header of the packet, 'h->ts' is the timestamp,
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'
+ * is the number of bytes actually captured.
+ */
+u_int
+ieee802_11_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+ return ieee802_11_print(p, h->len, h->caplen);
+}
+
+static int
+print_radiotap_field(struct cpack_state *s, u_int32_t bit)
+{
+ union {
+ int8_t i8;
+ u_int8_t u8;
+ int16_t i16;
+ u_int16_t u16;
+ u_int32_t u32;
+ u_int64_t u64;
+ } u, u2;
+ int rc;
+
+ switch (bit) {
+ case IEEE80211_RADIOTAP_FLAGS:
+ case IEEE80211_RADIOTAP_RATE:
+ 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:
+ 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;
default:
- printf("(body) unhandled IEEE802.11 frame type (%d)",
- FC_TYPE(fc));
+ /* this bit indicates a field whose
+ * size we do not know, so we cannot
+ * proceed.
+ */
+ printf("[0x%08x] ", bit);
+ return -1;
+ }
+
+ if (rc != 0) {
+ printf("[|802.11]");
+ return rc;
+ }
+
+ switch (bit) {
+ case IEEE80211_RADIOTAP_CHANNEL:
+ printf("%u MHz ", u.u16);
+ if (u2.u16 != 0)
+ printf("(0x%04x) ", u2.u16);
+ break;
+ case IEEE80211_RADIOTAP_FHSS:
+ printf("fhset %d fhpat %d ", u.u16 & 0xff, (u.u16 >> 8) & 0xff);
+ break;
+ case IEEE80211_RADIOTAP_RATE:
+ PRINT_RATE("", u.u8, " Mb/s ");
+ break;
+ case IEEE80211_RADIOTAP_DBM_ANTSIGNAL:
+ printf("%ddB signal ", u.i8);
break;
+ case IEEE80211_RADIOTAP_DBM_ANTNOISE:
+ printf("%ddB noise ", u.i8);
+ break;
+ case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
+ printf("%ddB signal ", u.u8);
+ break;
+ case IEEE80211_RADIOTAP_DB_ANTNOISE:
+ printf("%ddB noise ", u.u8);
+ break;
+ case IEEE80211_RADIOTAP_LOCK_QUALITY:
+ printf("%u sq ", u.u16);
+ break;
+ case IEEE80211_RADIOTAP_TX_ATTENUATION:
+ printf("%d tx power ", -(int)u.u16);
+ break;
+ case IEEE80211_RADIOTAP_DB_TX_ATTENUATION:
+ printf("%ddB tx power ", -(int)u.u8);
+ break;
+ case IEEE80211_RADIOTAP_DBM_TX_POWER:
+ printf("%ddBm tx power ", u.i8);
+ break;
+ case IEEE80211_RADIOTAP_FLAGS:
+ if (u.u8 & IEEE80211_RADIOTAP_F_CFP)
+ printf("cfp ");
+ if (u.u8 & IEEE80211_RADIOTAP_F_SHORTPRE)
+ printf("short preamble ");
+ if (u.u8 & IEEE80211_RADIOTAP_F_WEP)
+ printf("wep ");
+ if (u.u8 & IEEE80211_RADIOTAP_F_FRAG)
+ printf("fragmented ");
+ break;
+ case IEEE80211_RADIOTAP_ANTENNA:
+ printf("antenna %d ", u.u8);
+ break;
+ case IEEE80211_RADIOTAP_TSFT:
+ printf("%" PRIu64 "us tsft ", u.u64);
+ break;
+ }
+ return 0;
+}
+
+static u_int
+ieee802_11_radio_print(const u_char *p, u_int length, u_int caplen)
+{
+#define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x)))
+#define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x)))
+#define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x)))
+#define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x)))
+#define BITNO_2(x) (((x) & 2) ? 1 : 0)
+#define BIT(n) (1 << n)
+#define IS_EXTENDED(__p) \
+ (EXTRACT_LE_32BITS(__p) & BIT(IEEE80211_RADIOTAP_EXT)) != 0
+
+ struct cpack_state cpacker;
+ struct ieee80211_radiotap_header *hdr;
+ u_int32_t present, next_present;
+ u_int32_t *presentp, *last_presentp;
+ enum ieee80211_radiotap_type bit;
+ int bit0;
+ const u_char *iter;
+ u_int len;
+
+ if (caplen < sizeof(*hdr)) {
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ hdr = (struct ieee80211_radiotap_header *)p;
+
+ len = EXTRACT_LE_16BITS(&hdr->it_len);
+
+ if (caplen < len) {
+ printf("[|802.11]");
+ return caplen;
+ }
+ for (last_presentp = &hdr->it_present;
+ IS_EXTENDED(last_presentp) &&
+ (u_char*)(last_presentp + 1) <= p + len;
+ last_presentp++);
+
+ /* are there more bitmap extensions than bytes in header? */
+ if (IS_EXTENDED(last_presentp)) {
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ iter = (u_char*)(last_presentp + 1);
+
+ if (cpack_init(&cpacker, (u_int8_t*)iter, len - (iter - p)) != 0) {
+ /* XXX */
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ for (bit0 = 0, presentp = &hdr->it_present; presentp <= last_presentp;
+ presentp++, bit0 += 32) {
+ for (present = EXTRACT_LE_32BITS(presentp); present;
+ present = next_present) {
+ /* clear the least significant bit that is set */
+ next_present = present & (present - 1);
+
+ /* extract the least significant bit that is set */
+ bit = (enum ieee80211_radiotap_type)
+ (bit0 + BITNO_32(present ^ next_present));
+
+ if (print_radiotap_field(&cpacker, bit) != 0)
+ goto out;
+ }
+ }
+out:
+ return len + ieee802_11_print(p + len, length - len, caplen - len);
+#undef BITNO_32
+#undef BITNO_16
+#undef BITNO_8
+#undef BITNO_4
+#undef BITNO_2
+#undef BIT
+}
+
+static u_int
+ieee802_11_avs_radio_print(const u_char *p, u_int length, u_int caplen)
+{
+ u_int32_t caphdr_len;
+
+ caphdr_len = EXTRACT_32BITS(p + 4);
+ if (caphdr_len < 8) {
+ /*
+ * Yow! The capture header length is claimed not
+ * to be large enough to include even the version
+ * cookie or capture header length!
+ */
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ if (caplen < caphdr_len) {
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ return caphdr_len + ieee802_11_print(p + caphdr_len,
+ length - caphdr_len, caplen - caphdr_len);
+}
+
+#define PRISM_HDR_LEN 144
+
+#define WLANCAP_MAGIC_COOKIE_V1 0x80211001
+
+/*
+ * For DLT_PRISM_HEADER; like DLT_IEEE802_11, but with an extra header,
+ * containing information such as radio information, which we
+ * currently ignore.
+ *
+ * If, however, the packet begins with WLANCAP_MAGIC_COOKIE_V1, it's
+ * really DLT_IEEE802_11_RADIO (currently, on Linux, there's no
+ * ARPHRD_ type for DLT_IEEE802_11_RADIO, as there is a
+ * ARPHRD_IEEE80211_PRISM for DLT_PRISM_HEADER, so
+ * ARPHRD_IEEE80211_PRISM is used for DLT_IEEE802_11_RADIO, and
+ * the first 4 bytes of the header are used to indicate which it is).
+ */
+u_int
+prism_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+ u_int caplen = h->caplen;
+ u_int length = h->len;
+
+ if (caplen < 4) {
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ if (EXTRACT_32BITS(p) == WLANCAP_MAGIC_COOKIE_V1)
+ return ieee802_11_avs_radio_print(p, length, caplen);
+
+ if (caplen < PRISM_HDR_LEN) {
+ printf("[|802.11]");
+ return caplen;
+ }
+
+ return PRISM_HDR_LEN + ieee802_11_print(p + PRISM_HDR_LEN,
+ length - PRISM_HDR_LEN, caplen - PRISM_HDR_LEN);
+}
+
+/*
+ * For DLT_IEEE802_11_RADIO; like DLT_IEEE802_11, but with an extra
+ * header, containing information such as radio information, which we
+ * currently ignore.
+ */
+u_int
+ieee802_11_radio_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+ u_int caplen = h->caplen;
+ u_int length = h->len;
+
+ if (caplen < 8) {
+ printf("[|802.11]");
+ return caplen;
}
- if (xflag)
- default_print(p, caplen);
- out:
- putchar('\n');
+ return ieee802_11_radio_print(p, length, caplen);
}
projects / tcpdump / blobdiff