#include <arpa/inet.h>
#include <pcap.h>
#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "hdw-sniff.h" /* my functions */
+/* global variables */
+int file_fd=0;
+
int main(int argc, char *argv[]) {
char pcap_error[PCAP_ERRBUF_SIZE];
fd_set pcap_fd_set;
struct timeval fd_set_tv;
char sys_call[30];
- FILE *logfile;
struct info_struct my_info_struct;
/* parse the arguments */
printf("no logfile specified, writing to stdout ...\n");
}
else {
- if((logfile=fopen(argv[3],"w"))!=NULL) {
+ if((file_fd=open(argv[3],O_RDWR | O_CREAT))!=0) {
printf("writing to logfile %s ...\n",argv[3]);
}
else {
const u_char *package) {
/* local variables */
+ char tmp_buf[20],crypted_snap[11];
struct linux_wlan_ng_prism_hdr *prism_hdr;
struct ieee802_11_hdr *w_hdr;
+ struct snaphdr *snap_hdr;
struct ethhdr *e_hdr;
struct iphdr *ip_hdr;
struct info_struct *my_info_struct;
e_o=sizeof(struct ethhdr);
i_o=sizeof(struct iphdr);
+ /* new package */
printf("\n");
printf("---> package %d ---- %s",my_info_struct->count,
ctime((const time_t*)&(pcap_header->ts.tv_sec)));
- printf("pcap header:\n");
- printf("capture_length: %d (dec.)\t",pcap_header->caplen);
- printf("length(off wire): %d (dec.)\n",pcap_header->len);
+
+ /* pcap header */
+ printf("pcap header: ");
+ printf("capture_length(dec): %d\t",pcap_header->caplen);
+ printf("off_wire_length(dec): %d\n",pcap_header->len);
/* wireless stuff */
/* prism wlan ng headers */
(strncmp(my_info_struct->dev,"wlan",4)==0)) {
printf("prism header: (%d bytes)\n",p_o);
prism_hdr=(struct linux_wlan_ng_prism_hdr *)package;
- printf("message code/length: %d/%d\n",ntohs(prism_hdr->msgcode),
- ntohs(prism_hdr->msglen));
- printf("device: %s\n",prism_hdr->devname);
+ printf("| message code/length: %d/%d |\t",prism_hdr->msgcode,
+ prism_hdr->msglen);
+ printf("device: %s |\n",prism_hdr->devname);
/* ieee802.11 header */
printf("ieee802.11 header: (%d bytes)\n",w_o);
w_hdr=(struct ieee802_11_hdr *)(package+p_o);
printf("%s%d%s",(i==0?"|":""),
(((w_hdr->frame_ctl) & (1<<i))>0?1:0),
(i==15?"|\n":"|"));
- printf("fc: | v | t | s-t |t|f|m|r|p|m|w|o|\n");
+ printf(" | v | t | s-t |t|f|m|r|p|m|w|o|\n");
+ /* frame type */
+ /* management */
+ if(!(w_hdr->frame_ctl & 0x0c)) {
+ if((w_hdr->frame_ctl & IEEE802_11_STYPE_ASSOC_REQ)>0)
+ strcpy(tmp_buf,"association request");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_ASSOC_RESP)>0)
+ strcpy(tmp_buf,"association response");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_REASSOC_REQ)>0)
+ strcpy(tmp_buf,"reassociation request");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_REASSOC_RESP)>0)
+ strcpy(tmp_buf,"reassociation response");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_PROBE_REQ)>0)
+ strcpy(tmp_buf,"probe request");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_PROBE_RESP)>0)
+ strcpy(tmp_buf,"probe response");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_BEACON)>0)
+ strcpy(tmp_buf,"beacon");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_ATIM)>0)
+ strcpy(tmp_buf,"announcement traffic indication message");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_DISASSOC)>0)
+ strcpy(tmp_buf,"disassociation");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_AUTH)>0)
+ strcpy(tmp_buf,"authentification");
+ else if((w_hdr->frame_ctl & IEEE802_11_STYPE_DEAUTH)>0)
+ strcpy(tmp_buf,"deauthentification");
+ else strcpy(tmp_buf,"impossible situation \%) - go mail the author.");
+ }
+ else strcpy(tmp_buf,"control & data frame type not supported yet");
+ /* print out frame type */
+ printf("=> %s\n",tmp_buf);
- printf("ion_id: %x\n",ntohs(w_hdr->duration_id));
+ printf("duration/id: 0x%x\n",w_hdr->duration_id);
printf("version check ... %s\n",
- ((ntohs(w_hdr->frame_ctl) & IEEE802_11_FCTL_VERS)==0x00)?
+ ((w_hdr->frame_ctl & IEEE802_11_FCTL_VERS)==0x00)?
"ok":"unknown");
}
/* ieee802.3 */
+ /* we need smaller w_hdr for non distributed frames */
+ if((w_hdr->frame_ctl & (1<<8)) & (w_hdr->frame_ctl & (1<<9))) {
+ printf("=> distributed packet !!!!11\n");
+ } else w_o-=(sizeof(struct snaphdr)-sizeof(unsigned short));
+
/* ethernet */
- printf("ethernet: (%d bytes)\n",e_o);
- e_hdr=(struct ethhdr *)(package+p_o+w_o);
- /* what types ? */
- printf("type = ");
- printf("%x ",ntohs(e_hdr->h_proto));
- printf("dest_addr = ");
- for(i=0;i<ETH_ALEN;i++)
- printf("%x%s",*(e_hdr->h_dest+i),((i==ETH_ALEN-1)?" ":":"));
- printf(" src_addr = ");
- for(i=0;i<ETH_ALEN;i++)
- printf("%x%s",*(e_hdr->h_source+i),((i==ETH_ALEN-1)?"\n":":"));
+ if((strncmp(my_info_struct->dev,"eth",3)==0) |
+ ((w_hdr->frame_ctl & IEEE802_11_FTYPE_DATA)>0)) {
+
+ if(!(w_hdr->frame_ctl & IEEE802_11_FTYPE_DATA)) {
+ printf("ethernet: (%d bytes)\n",e_o);
+ e_hdr=(struct ethhdr *)(package+p_o+w_o);
+ /* what types ? */
+ printf("type = ");
+ printf("%x ",ntohs(e_hdr->h_proto));
+ printf("dest_addr = ");
+ for(i=0;i<ETH_ALEN;i++)
+ printf("%x%s",*(e_hdr->h_dest+i),((i==ETH_ALEN-1)?" ":":"));
+ printf(" src_addr = ");
+ for(i=0;i<ETH_ALEN;i++) printf("%x%s",*(e_hdr->h_source+i),
+ ((i==ETH_ALEN-1)?"\n":":"));
+ }
+ else {
+ snap_hdr=(struct snaphdr *)(package+p_o+w_o);
+ if((snap_hdr->snap[0]==0xaa) &
+ (snap_hdr->snap[1]==0xaa) &
+ (snap_hdr->snap[2]==0x03) &
+ (snap_hdr->snap[3]==0x00) &
+ (snap_hdr->snap[4]==0x00) &
+ (snap_hdr->snap[5]==0x00)) {
+ printf("- no encryption!\n");
+ if(snap_hdr->proto==ntohs(ETH_P_IP)) {
+ /* we want ip header to get parsed */
+ e_hdr->h_proto=htons(ETH_P_IP);
+ e_o=sizeof(struct snaphdr);
+ }
+ }
+ else {
+ printf("- crypted packet!\n");
+ /* print crypted snap - write into file */
+ printf("snap: (iv + crypted aa aa 03 00 00 00) ");
+ for(i=0;i<10;i++) {
+ printf("%x ",*(snap_hdr->snap+i));
+ crypted_snap[i]=*(snap_hdr->snap+i);
+ // if(file_fd>0)
+ // write(file_fd,snap_hdr->snap+i-4,1);
+ }
+ printf("\n");
+ crypted_snap[10]='\n';
+ if(file_fd>0) {
+ printf("debug: saved to file\n");
+ write(file_fd,crypted_snap,11);
+ }
+ /* dont look at ipheader */
+ e_hdr->h_proto=htons(0);
+ }
+ }
/* IP ? */
if(ntohs(e_hdr->h_proto)==ETH_P_IP) {
printf("service = %x ",ntohs(ip_hdr->tos));
printf("total_length(dec.) = %d \n",ntohs(ip_hdr->tot_len));
printf("source_ip: ");
- for(i=3;i>=0;--i) {
+ for(i=0;i<=3;++i) {
printf("%d%s",
- ip_hdr->saddr&0xff<<i,
- (i==0?"\n":"."));
+ (ip_hdr->saddr&(0xff<<(8*i)))>>(8*i),
+ (i==3?"\n":"."));
}
printf("destination_ip: ");
- for(i=3;i>=0;--i) {
+ for(i=0;i<=3;++i) {
printf("%d%s",
- ip_hdr->daddr&0xff<<i,
- (i==0?"\n":"."));
+ (ip_hdr->daddr&(0xff<<(8*i)))>>(8*i),
+ (i==3?"\n":"."));
}
printf("ip_id = %x ",ntohs(ip_hdr->id));
printf("ip_offset = %x \n",ntohs(ip_hdr->frag_off));
ntohs(ip_hdr->protocol));
// printf("chksum: %x\n",ntohs(ip_hdr->ip_sum));
}
+ }
+
+ /* check what we have ... */
printf("all dump: (hex)\n");
for(i=p_o+w_o;i<pcap_header->caplen;i++)
printf("%x ",*(package+i));