ip address support added

[my-code/hdw-sniff.git] / hdw-sniff.c

diff --git a/hdw-sniff.c b/hdw-sniff.c
index 2757d6a..f6a8bc9 100644 (file)
--- a/hdw-sniff.c
+++ b/hdw-sniff.c
@@ -6,12 +6,96 @@
 
 #include <stdio.h>
 #include <pcap.h>
+
+/* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */
+#include <netinet/if_ether.h>
+#include <netinet/ip.h> /* ip */
+#include <netinet/in.h>        /* in_addr */
+
+/* IEEE 802.11 stuff -- will become one include later ... */
+#include "ieee80211.h" /* from hunz's aeolus, short hostap_wlan.h */
+#include "ieee802_11.h" /* from pcmcia-cs */
+
 #include "hdw-sniff.h" /* my functions */
 
+#define MAX_PACKAGES 3
+
 int main(int argc, char *argv[]) {
-       
-       int count;
 
+       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;
+       
        /* parse the arguments */
-       for(i=1;i<argc,++i) {
-                       
+       if(argc<2) {
+               printf("usage: %s <interface> <logfile>\n",argv[0]);
+               return 0;
+       }
+       if(argc!=3) {
+               printf("no logfile specified, writing to stdout ...\n");
+       }
+       
+       /* start pcap session */
+       pcap_handle=pcap_open_live(argv[1],BUFSIZ,1,-1,pcap_error);
+       if(pcap_handle==NULL) {
+               printf("%s: %s\n",argv[0],pcap_error);
+               return 1;
+       }
+       
+       /* grab a package until user breaks */
+       count=0;
+       while (count<MAX_PACKAGES) {
+       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);
+       }
+       
+       /* is ieee802.11 ? -- we assume yes :) */
+       /* ...                                  */
+
+
+       /* ieee802.3 */
+       /* ethernet */
+       e_hdr=(struct ethhdr *)package;
+       /* 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":":"));
+               /* 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("all_hex_dump:\n");
+       for(i=sizeof(struct ethhdr);i<pcap_header.caplen;i++)
+               printf("%x ",*(package+i));
+       printf("\n");
+       }
+       printf("\n");
+       printf("wake up early! :)\n");
+       printf("\n");
+}