X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fhdw-sniff.git;a=blobdiff_plain;f=hdw-sniff.c;h=174e00f7d20b7e46092051154a5674fb98f80245;hp=2757d6a02b775d5fd36bd5100cbc0a17b7dcfbfc;hb=da0b8f90085c39c74cc7243a3ca1aa96eb5e5153;hpb=65006c10b34ca9dee50c9cfb0acba1229e1f2296

diff --git a/hdw-sniff.c b/hdw-sniff.c
index 2757d6a..174e00f 100644
--- a/hdw-sniff.c
+++ b/hdw-sniff.c
@@ -6,12 +6,89 @@
 
 #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 */
 
 int main(int argc, char *argv[]) {
-	
-	int count;
 
+	int i;
+	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;
+	
 	/* 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 */
+	while (1) {
+	printf("\n");
+
+	printf("----| new package |----| hdw - sniff |----\n");
+	if((package=pcap_next(pcap_handle,&pcap_header))!=NULL) {
+		printf("package received at: %s",
+			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);
+	}
+	
+	/* 802.11 or 802.3 -- not quite sure about 'D' & '\0' */
+	if(*package=='D') {
+		printf("ieee802.11: ");
+	}
+	else if(*package=='\0') {
+		printf("ethernet: ");
+		/* reading ethernet header */
+		e_hdr=(struct ethhdr *)package;
+		/* what types ? */
+		printf("types = ");
+		// for(i=0;i<2;i++)
+		printf("%x %x\n",
+			/* i==0?"0x":" ", */
+			*(e_hdr->h_proto)
+			/* i==1?"\n":"" */
+		);
+		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":":"));
+		printf("rest:\n");
+		for(i=sizeof(struct ethhdr);i<pcap_header.caplen;i++)
+			printf("%x ",*(package+i));
+		printf("\n");
+	}
+	else {
+		printf("unknown: ");
+		/* print the whole package in hex */
+		for(i=0;i<=pcap_header.caplen;i++) printf("%x ",*(package+i));
+		printf("\n");
+		printf("%c <- identifier for unknown!\n",*package);
+	}
+	}
+	printf("just beacon frames, ha? - wake up early! :)");
+}