X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=a20168852e88cf74a790536fc802a3bf8ef18844;hb=7bcd9bb684c81b49e4562d5151a25c37d3daa2e0;hp=2757d6a02b775d5fd36bd5100cbc0a17b7dcfbfc;hpb=65006c10b34ca9dee50c9cfb0acba1229e1f2296;p=my-code%2Fhdw-sniff.git

diff --git a/hdw-sniff.c b/hdw-sniff.c
index 2757d6a..a201688 100644
--- a/hdw-sniff.c
+++ b/hdw-sniff.c
@@ -6,12 +6,129 @@
 
 #include <stdio.h>
 #include <pcap.h>
+
+/* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */
+#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 "ieee802_11.h" /* from pcmcia-cs */
+
 #include "hdw-sniff.h" /* my functions */
 
 int main(int argc, char *argv[]) {
-	
-	int count;
 
+	char pcap_error[PCAP_ERRBUF_SIZE];
+	pcap_t *pcap_handle;
+	char sys_call[30];
+	FILE *logfile;
+	int count;
+	int *p_count;
+	
 	/* parse the arguments */
-	for(i=1;i<argc,++i) {
+	if(argc<3) {
+		printf("usage: %s <interface> <monitor mode> <logfile>\n",
+			argv[0]);
+		return 0;
+	}
+	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) {
+		printf("%s: %s\n",argv[0],pcap_error);
+		return 1;
+	}
+	
+	/* grab a package until user breaks */
+	count=0;
+	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");
+	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("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("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("all_hex_dump:\n");
+	for(i=sizeof(struct ethhdr);i<pcap_header->caplen;i++)
+		printf("%x ",*(package+i));
+	printf("\n");
+}
+
+