#include <netinet/in.h>
#include <arpa/inet.h>
#include <pcap.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
/* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */
#include <netinet/if_ether.h> /* for ethhdr struct */
char pcap_error[PCAP_ERRBUF_SIZE];
pcap_t *pcap_handle;
+ int pcap_fd,foo_fd;
+ fd_set pcap_fd_set;
+ struct timeval fd_set_tv;
char sys_call[30];
FILE *logfile;
struct info_struct my_info_struct;
printf("%s: %s\n",argv[0],pcap_error);
return 1;
}
+
+ /* set non blocking */
+ if((pcap_setnonblock(pcap_handle,1,pcap_error))==-1) {
+ printf("%s: %s\n",argv[0],pcap_error);
+ return 1;
+ }
/* grab a package until user breaks */
my_info_struct.count=0;
my_info_struct.mmode=argv[2][0];
strcpy(my_info_struct.dev,argv[1]);
+
+ /* prepare for select */
+ pcap_fd=pcap_fileno(pcap_handle);
+
+ /* create file descriptor */
+ if((foo_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
+ printf("unable to create socket foo_fd\n");
+ return -1;
+ }
+
/* do loopp */
- pcap_loop(pcap_handle,-1,pcap_process,(u_char *)&my_info_struct);
+ while (1) {
+
+ /* set pcap_fd */
+ FD_ZERO(&pcap_fd_set);
+ FD_SET(pcap_fd,&pcap_fd_set);
+ fd_set_tv.tv_sec=0;
+ fd_set_tv.tv_usec=200000;
+
+ if((select(pcap_fd+1,&pcap_fd_set,NULL,NULL,&fd_set_tv)) && (FD_ISSET(pcap_fd,&pcap_fd_set))) pcap_dispatch(pcap_handle,-1,pcap_process,(u_char *)&my_info_struct);
+ else if((hop_channel(&my_info_struct,foo_fd))==-1) {
+ printf("channelhopping failed, aborting\n");
+ return -1;
+ }
+ }
return 0;
}
const u_char *package) {
/* local variables */
- struct ethhdr *e_hdr;
- struct ip *ip_hdr;
+ struct linux_wlan_ng_prism_hdr *prism_hdr;
struct ieee802_11_hdr *w_hdr;
+ struct ethhdr *e_hdr;
+ struct iphdr *ip_hdr;
struct info_struct *my_info_struct;
- int i;
-
+ int i,p_o,w_o,e_o,i_o;
+
my_info_struct=(struct info_struct *)info;
++(my_info_struct->count);
+
+ /* cache offsets */
+ p_o=((strncmp(my_info_struct->dev,"wlan",4)==0)?sizeof(struct linux_wlan_ng_prism_hdr):0);
+ w_o=((strncmp(my_info_struct->dev,"wlan",4)==0)?sizeof(struct ieee802_11_hdr):0);
+ e_o=sizeof(struct ethhdr);
+ i_o=sizeof(struct iphdr);
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.)",pcap_header->caplen);
+ printf("capture_length: %d (dec.)\t",pcap_header->caplen);
printf("length(off wire): %d (dec.)\n",pcap_header->len);
- /* is ieee802.11 ? -- we assume yes :) */
+ /* prism wlan ng headers */
if((my_info_struct->mmode-0x30==1) &&
(strncmp(my_info_struct->dev,"wlan",4)==0)) {
- printf("ieee802.11 header:\n");
- w_hdr=(struct ieee802_11_hdr *)package;
+ 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);
+ /* skip wlan_ng_prism header */
+ // package=package+p_o;
+
+ /* ieee802.11 header */
+ printf("ieee802.11 header: (%d bytes)\n",w_o);
+ w_hdr=(struct ieee802_11_hdr *)(package+p_o);
+
+ printf("debug:\n");
+ for(i=0;i<16;i++) {
+ printf("%x -> ",1<<i);
+ printf("%x\n",(ntohs(w_hdr->frame_ctl) & (1<<i)));
+ }
printf("frame_control: %x duration_id: %x\n",ntohs(w_hdr->frame_ctl),
ntohs(w_hdr->duration_id));
+ printf("version check ... %s\n",
+ ((ntohs(w_hdr->frame_ctl) & IEEE802_11_FCTL_VERS)==0x00)?
+ "ok":"unknown");
+ // printf("type:
/* skip ieee802.11 header */
- package=package+sizeof(struct ieee802_11_hdr);
+ // package=package+w_o;
}
/* ieee802.3 */
/* ethernet */
- e_hdr=(struct ethhdr *)package;
+ 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(" src_addr = ");
for(i=0;i<ETH_ALEN;i++)
printf("%x%s",*(e_hdr->h_source+i),((i==ETH_ALEN-1)?"\n":":"));
+
/* IP ? */
if(ntohs(e_hdr->h_proto)==ETH_P_IP) {
- printf("ip protocol: ");
- ip_hdr=(struct ip *)(package+sizeof(struct ethhdr));
- printf("version = %x ",ntohs(ip_hdr->ip_v));
- printf("header_length = %x \n",ntohs(ip_hdr->ip_hl));
- printf("service = %x ",ntohs(ip_hdr->ip_tos));
- printf("total_length(dec.) = %d \n",ntohs(ip_hdr->ip_len));
- printf("ip_addresses: source = ");
- printf("%s\tdestination = %s\n",inet_ntoa(ip_hdr->ip_src),
- inet_ntoa(ip_hdr->ip_dst));
- printf("ip_id = %x ",ntohs(ip_hdr->ip_id));
- printf("ip_offset = %x \n",ntohs(ip_hdr->ip_off));
- printf("time2live = %x ip_proto = %x\n",ntohs(ip_hdr->ip_ttl),
- ntohs(ip_hdr->ip_p));
- printf("chksum: %x\n",ntohs(ip_hdr->ip_sum));
+ printf("ip protocol: (%d bytes)\n",i_o);
+ ip_hdr=(struct iphdr *)(package+p_o+w_o+e_o);
+ printf("version = %x ",ntohs(ip_hdr->version));
+ printf("header_length = %x \n",ntohs(ip_hdr->ihl));
+ 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) {
+ printf("%d%s",
+ ip_hdr->saddr&0xff<<i,
+ (i==0?"\n":"."));
+ }
+ printf("destination_ip: ");
+ for(i=3;i>=0;--i) {
+ printf("%d%s",
+ ip_hdr->daddr&0xff<<i,
+ (i==0?"\n":"."));
+ }
+ // printf("ip_addresses: source = ");
+ // printf("%s\tdestination = %s\n",inet_ntoa(ip_hdr->saddr),
+ // inet_ntoa(ip_hdr->daddr));
+ printf("ip_id = %x ",ntohs(ip_hdr->id));
+ printf("ip_offset = %x \n",ntohs(ip_hdr->frag_off));
+ printf("time2live = %x ip_proto = %x\n",ntohs(ip_hdr->ttl),
+ ntohs(ip_hdr->protocol));
+ // printf("chksum: %x\n",ntohs(ip_hdr->ip_sum));
}
- printf("all_hex_dump:\n");
- for(i=
sizeof(struct ethhdr);i<pcap_header->caplen;i++)
+ printf("all ethernet dump: (hex)\n");
+ for(i=
p_o+w_o+e_o;i<pcap_header->caplen;i++)
printf("%x ",*(package+i));
printf("\n");
+ printf("all ethernet dump: (char)\n");
+ for(i=p_o+w_o+e_o;i<pcap_header->caplen;i++)
+ printf("%c ",*(package+i));
+ printf("\n");
}
-
+int hop_channel(struct info_struct *info,int foo_fd) {
+ if((info->mmode-0x30==1) && (strncmp(info->dev,"wlan",4)==0)) {
+
+ struct iwreq my_iwreq;
+
+ if (info->channel>=14) info->channel=1;
+
+ memset(&my_iwreq,0,sizeof(my_iwreq));
+ strcpy(my_iwreq.ifr_name,info->dev);
+ printf("debug: channel = %d\n",info->channel);
+ my_iwreq.u.freq.e=0;
+ my_iwreq.u.freq.m=info->channel;
+ if((ioctl(foo_fd,SIOCSIWFREQ,&my_iwreq))==-1) {
+ printf("unable to hop channels\n");
+ perror("ioctl");
+ return -1;
+ }
+ ++(info->channel);
+ }
+ return 0;
+}
projects / my-code / hdw-sniff.git / blobdiff