*/
#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <time.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
#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 */
+#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 ip *ip_hdr;
- struct ieee802_11_hdr *w_hdr;
+ char sys_call[30];
+ FILE *logfile;
+ struct info_struct my_info_struct;
/* 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) {
+ printf("setting to monitor mode\n");
+ if(strncmp(argv[1],"wlan",4)==0)
+ sprintf(sys_call,"iwpriv %s monitor 3",argv[1]);
+ if(strncmp(argv[1],"eth",3)==0)
+ sprintf(sys_call,"ifconfig %s promisc",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++;
+ my_info_struct.count=0;
+ my_info_struct.mmode=argv[2][0];
+ strcpy(my_info_struct.dev,argv[1]);
+ /* do loopp */
+ pcap_loop(pcap_handle,-1,pcap_process,(u_char *)&my_info_struct);
+ return 0;
+}
+
+
+/* pcap_process callback function */
+void pcap_process(u_char *info,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;
+ struct info_struct *my_info_struct;
+ int i;
+
+ my_info_struct=(struct info_struct *)info;
+ ++(my_info_struct->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",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("length(off wire): %d (dec.)\n",pcap_header->len);
/* is ieee802.11 ? -- we assume yes :) */
-
-
+ 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("frame_control: %x duration_id: %x\n",ntohs(w_hdr->frame_ctl),
+ ntohs(w_hdr->duration_id));
+ /* skip ieee802.11 header */
+ package=package+sizeof(struct ieee802_11_hdr);
+ }
+
+ /* 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("ip protocol: ");
ip_hdr=(struct ip *)(package+sizeof(struct ethhdr));
printf("version = %x ",ntohs(ip_hdr->ip_v));
- printf("header_length = %x ",ntohs(ip_hdr->ip_hl));
- // i=0;
- //printf("service = %x ",*(ip_hdr->ip_tos));
- //printf("total_length(dec.) = %hu \n",*(ip_hdr->ip_len));
+ 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 = ");
- for(i=0;i<4;i++)
- printf("%x%s",*(ip_hdr->ip_src+i),
- (i==3?"\n":"."));
-
-
+ 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");
}
+
+