X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=e49ec34ce7a03383a89e570730dcf44fa3a86bd1;hb=3cd7e5c91cc95ead863814a848096315c9a326c1;hp=2757d6a02b775d5fd36bd5100cbc0a17b7dcfbfc;hpb=65006c10b34ca9dee50c9cfb0acba1229e1f2296;p=my-code%2Fhdw-sniff.git

diff --git a/hdw-sniff.c b/hdw-sniff.c
index 2757d6a..e49ec34 100644
--- a/hdw-sniff.c
+++ b/hdw-sniff.c
@@ -6,12 +6,84 @@
 
 #include <stdio.h>
 #include <pcap.h>
+
+/* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */
+#include <netinet/if_ether.h>
+
+/* 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 :) */
+	
+	
+	/* ethernet */
+	e_hdr=(struct ethhdr *)package;
+	/* what types ? */
+	printf("types = ");
+	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(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:4));
+		printf("header length = %x\n",ntohs(ip_hdr->ip_hl:4));
+	}
+	printf("rest:\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");
+}