#include <pcap.h>
/* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */
-#include <netinet/if_ether.h>
+#include <netinet/if_ether.h> /* for ethhdr struct */
+#include <netinet/ip.h> /* ip */
+#include <netinet/in.h> /* in_addr , inet_ntoa */
/* IEEE 802.11 stuff -- will become one include later ... */
#include "ieee80211.h" /* from hunz's aeolus, short hostap_wlan.h */
#include "hdw-sniff.h" /* my functions */
-#define MAX_PACKAGES 3
-
int main(int argc, char *argv[]) {
- int i,count;
char pcap_error[PCAP_ERRBUF_SIZE];
pcap_t *pcap_handle;
- const u_char *package;
- struct pcap_pkthdr pcap_header;
- struct ethhdr *e_hdr;
- struct ieee802_11_hdr *w_hdr;
+ char sys_call[30];
+ FILE *logfile;
+ int count;
+ int *p_count;
/* parse the arguments */
- if(argc<2) {
- printf("usage: %s <interface> <logfile>\n",argv[0]);
+ if(argc<3) {
+ printf("usage: %s <interface> <monitor mode> <logfile>\n",
+ argv[0]);
return 0;
}
- if(argc!=3) {
+ if(argc!=4) {
printf("no logfile specified, writing to stdout ...\n");
+ }
+ else {
+ if((logfile=fopen(argv[3],"w"))!=NULL) {
+ printf("writing to logfile %s ...\n",argv[3]);
+ }
+ else {
+ printf("can't open logfile!\n");
+ }
}
-
+
+ /* setting up device and set monitor mode */
+ if(atoi(argv[2])==1 && (strncmp(argv[1],"wlan",4)==0)) {
+ printf("setting to monitor mode 3\n");
+ sprintf(sys_call,"iwpriv %s monitor 3",argv[1]);
+ system(sys_call);
+ }
+ printf("setting up interface\n");
+ sprintf(sys_call,"ifconfig %s up",argv[1]);
+ system(sys_call);
+
/* start pcap session */
pcap_handle=pcap_open_live(argv[1],BUFSIZ,1,-1,pcap_error);
if(pcap_handle==NULL) {
/* grab a package until user breaks */
count=0;
- while (count<MAX_PACKAGES) {
- count++;
+ p_count=&count;
+ pcap_loop(pcap_handle,-1,pcap_process,(u_char *)p_count);
+}
+
+
+/* pcap_process callback function */
+void pcap_process(u_char *count,const struct pcap_pkthdr *pcap_header,
+ const u_char *package) {
+
+ /* local variables */
+ struct ethhdr *e_hdr;
+ struct ip *ip_hdr;
+ struct ieee802_11_hdr *w_hdr;
+ int i;
+ int *p_count;
+
+ p_count=(int *)count;
+ ++(*p_count);
+
printf("\n");
- if((package=pcap_next(pcap_handle,&pcap_header))!=NULL) {
- printf("---> package %d ---- %s",count,
- ctime((const time_t*)&pcap_header.ts.tv_sec));
- printf("pcap header: ");
- printf("capture length=%d ",pcap_header.caplen);
- printf("length(off wire)=%d\n",pcap_header.len);
- }
+ printf("---> package %d ---- %s",*p_count,
+ ctime((const time_t*)&(pcap_header->ts.tv_sec)));
+ printf("pcap header: ");
+ printf("capture length=%d ",pcap_header->caplen);
+ printf("length(off wire)=%d\n",pcap_header->len);
/* is ieee802.11 ? -- we assume yes :) */
-
-
+ if(atoi(argv[2])==1 && (strncmp(argv[1],"wlan",4)==0)) {
+ printf("debug: ieee802.11\n");
+ }
+
+
+ /* ieee802.3 */
/* ethernet */
e_hdr=(struct ethhdr *)package;
/* what types ? */
- printf("types = ");
+ printf("type = ");
printf("%x ",ntohs(e_hdr->h_proto));
printf("dest_addr = ");
for(i=0;i<ETH_ALEN;i++)
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: ");
- // printf("
+ 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("rest:\n");
- for(i=sizeof(struct ethhdr);i<pcap_header.caplen;i++)
+ printf("all_hex_dump:\n");
+ for(i=sizeof(struct ethhdr);i<pcap_header->caplen;i++)
printf("%x ",*(package+i));
printf("\n");
- }
- printf("\n");
- printf("just beacon frames, ha? - wake up early! :)\n");
- printf("\n");
}
+
+