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-rw-r--r--noncore/net/wellenreiter/daemon/source/sniffer.cc18
1 files changed, 14 insertions, 4 deletions
diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.cc b/noncore/net/wellenreiter/daemon/source/sniffer.cc
index 65c8579..be64d67 100644
--- a/noncore/net/wellenreiter/daemon/source/sniffer.cc
+++ b/noncore/net/wellenreiter/daemon/source/sniffer.cc
@@ -3,59 +3,70 @@
3 * This works only with cisco wireless cards with an rfmon 3 * This works only with cisco wireless cards with an rfmon
4 * able driver and not with wifi stuff. 4 * able driver and not with wifi stuff.
5 * 5 *
6 * $Id$ 6 * $Id$
7 */ 7 */
8 8
9#include "config.hh" 9#include "config.hh"
10#include "cardmode.hh" 10#include "cardmode.hh"
11#include "sniffer.hh" 11#include "sniffer.hh"
12#include "ieee802_11.hh" 12#include "ieee802_11.hh"
13#include "extract.hh" 13#include "extract.hh"
14 14
15int main(void) 15int main(void)
16 { 16 {
17 if(card_into_monitormode (SNIFFER_DEVICE, CARD_TYPE_NG) < 0) 17 if(card_into_monitormode (SNIFFER_DEVICE, CARD_TYPE_NG) < 0)
18 return 0; 18 return 0;
19 start_sniffing (SNIFFER_DEVICE); 19 start_sniffing (SNIFFER_DEVICE);
20 20
21 return 1; 21 return 1;
22} 22}
23 23
24int start_sniffing (char * device) 24int start_sniffing (char * device)
25{ 25{
26 26
27 pcap_t *handletopcap; 27 pcap_t *handletopcap; /* The handle to the libpcap */
28 char errbuf[PCAP_ERRBUF_SIZE]; 28 char errbuf[PCAP_ERRBUF_SIZE]; /* The errorbuffer of libpacap */
29 struct pcap_pkthdr header; /* The packet header from pcap*/
30 const u_char *packet; /* The actual packet content*/
29 31
30 /* opening the pcap for sniffing */ 32 /* opening the pcap for sniffing */
31 handletopcap = pcap_open_live(device, BUFSIZ, 1, 1000, errbuf); 33 handletopcap = pcap_open_live(device, BUFSIZ, 1, 1000, errbuf);
32 34
33 #ifdef HAVE_PCAP_NONBLOCK 35 #ifdef HAVE_PCAP_NONBLOCK
34 pcap_setnonblock(handletopcap, 1, errstr); 36 pcap_setnonblock(handletopcap, 1, errstr);
35 #endif 37 #endif
36 /*start scanning */ 38 /*start scanning */
37 pcap_loop(handletopcap,-1,process_packets,NULL); 39 //pcap_loop(handletopcap,-1,process_packets,NULL);
40 /* Loope endless */
41 while(1)
42 {
43 /* Grab one single packet */
44 packet = pcap_next(handletopcap, &header);
45
46 /* process the packet */
47 process_packets(NULL,&header,*&packet);
48 }
38 49
39 printf("\nDone processing packets... wheew!\n"); 50 printf("\nDone processing packets... wheew!\n");
40 return 1; 51 return 1;
41} 52}
42 53
43void process_packets(u_char *useless,const struct pcap_pkthdr* pkthdr,const u_char* packet) 54void process_packets(u_char *useless,const struct pcap_pkthdr* pkthdr,const u_char* packet)
44{ 55{
45 u_int caplen = pkthdr->caplen; 56 u_int caplen = pkthdr->caplen;
46 u_int length = pkthdr->len; 57 u_int length = pkthdr->len;
47 u_int16_t fc; 58 u_int16_t fc;
48 u_int HEADER_LENGTH; 59 u_int HEADER_LENGTH;
49 60
50 /* pinfo holds all interresting information for us */ 61 /* pinfo holds all interresting information for us */
51 struct packetinfo pinfo; 62 struct packetinfo pinfo;
52 struct packetinfo *pinfoptr; 63 struct packetinfo *pinfoptr;
53 pinfoptr=&pinfo; 64 pinfoptr=&pinfo;
54 65
55 pinfoptr->isvalid = 0; 66 pinfoptr->isvalid = 0;
56 pinfoptr->pktlen = pkthdr->len; 67 pinfoptr->pktlen = pkthdr->len;
57 68
58 if (caplen < IEEE802_11_FC_LEN) 69 if (caplen < IEEE802_11_FC_LEN)
59 { 70 {
60 /* This is a garbage packet, because is does not long enough 71 /* This is a garbage packet, because is does not long enough
61 to hold a 802.11b header */ 72 to hold a 802.11b header */
@@ -77,49 +88,48 @@ void process_packets(u_char *useless,const struct pcap_pkthdr* pkthdr,const u_ch
77 } 88 }
78 89
79 /* Decode 802.11b header out of the packet */ 90 /* Decode 802.11b header out of the packet */
80 if (decode_80211b_hdr(packet,pinfoptr) == 0) 91 if (decode_80211b_hdr(packet,pinfoptr) == 0)
81 { 92 {
82 /* Justification of the ofset to further process the packet */ 93 /* Justification of the ofset to further process the packet */
83 length -= HEADER_LENGTH; 94 length -= HEADER_LENGTH;
84 caplen -= HEADER_LENGTH; 95 caplen -= HEADER_LENGTH;
85 packet += HEADER_LENGTH; 96 packet += HEADER_LENGTH;
86 } 97 }
87 else 98 else
88 { /* Something is wrong,could not be a correct packet */ 99 { /* Something is wrong,could not be a correct packet */
89 return; 100 return;
90 } 101 }
91 102
92 switch (FC_TYPE(fc)) 103 switch (FC_TYPE(fc))
93 { 104 {
94 /* Is it a managemnet frame? */ 105 /* Is it a managemnet frame? */
95 case T_MGMT: 106 case T_MGMT:
96 switch (FC_SUBTYPE(fc)) 107 switch (FC_SUBTYPE(fc))
97 { /* Is it a beacon frame? */ 108 { /* Is it a beacon frame? */
98 case ST_BEACON: 109 case ST_BEACON:
99 if (handle_beacon(fc, packet,pinfoptr) ==0) 110 if (handle_beacon(fc, packet,pinfoptr) ==0)
100 { 111 {
101 printf ("\n\tOn network : %s",pinfoptr->ssid);
102 if (!strcmp(pinfoptr->desthwaddr,"ff:ff:ff:ff:ff:ff") == 0) 112 if (!strcmp(pinfoptr->desthwaddr,"ff:ff:ff:ff:ff:ff") == 0)
103 { 113 {
104 /* Every beacon must have the broadcast as destination 114 /* Every beacon must have the broadcast as destination
105 so it must be a shitti packet */ 115 so it must be a shitti packet */
106 pinfoptr->isvalid = 0; 116 pinfoptr->isvalid = 0;
107 return; 117 return;
108 } 118 }
109 119
110 if (pinfoptr->cap_ESS == pinfoptr->cap_IBSS) 120 if (pinfoptr->cap_ESS == pinfoptr->cap_IBSS)
111 { 121 {
112 /* Only one of both are possible, so must be 122 /* Only one of both are possible, so must be
113 a noise packet, if this comes up */ 123 a noise packet, if this comes up */
114 pinfoptr->isvalid = 0; 124 pinfoptr->isvalid = 0;
115 return; 125 return;
116 } 126 }
117 if (pinfoptr->channel < 1 || pinfoptr->channel > 14) 127 if (pinfoptr->channel < 1 || pinfoptr->channel > 14)
118 { 128 {
119 /* Only channels between 1 and 14 are possible 129 /* Only channels between 1 and 14 are possible
120 others must be noise packets */ 130 others must be noise packets */
121 pinfoptr->isvalid = 0; 131 pinfoptr->isvalid = 0;
122 return; 132 return;
123 } 133 }
124 134
125 /* Here should be the infos to the gui issued */ 135 /* Here should be the infos to the gui issued */