From 0e50ececb00ef7a80203545d27edfaf4bc95d4b8 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard>
Date: Tue, 10 Sep 2002 01:55:28 +0000
Subject: [PATCH] pcap_next -> pcap_loop
---
hdw-sniff.c | 88 ++++++++++++++++++++++++++++++++++++-----------------
hdw-sniff.h | 6 +++-
2 files changed, 65 insertions(+), 29 deletions(-)
diff --git a/hdw-sniff.c b/hdw-sniff.c
index f6a8bc9..96ef4a2 100644
--- a/hdw-sniff.c
+++ b/hdw-sniff.c
@@ -8,7 +8,7 @@
#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 */
@@ -18,28 +18,42 @@
#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;
+ int count;
+ int *p_count;
/* 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 && (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) {
@@ -49,16 +63,32 @@ int main(int argc, char *argv[]) {
/* grab a package until user breaks */
count=0;
- while (count<MAX_PACKAGES) {
- count++;
+ p_count=&count;
+ pcap_dispatch(pcap_handle,-1,(pcap_handler)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");
- 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",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 :) */
/* ... */
@@ -87,15 +117,17 @@ int main(int argc, char *argv[]) {
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++)
+ 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");
}
+
+
diff --git a/hdw-sniff.h b/hdw-sniff.h
index 40a8c17..d7a3e89 100644
--- a/hdw-sniff.h
+++ b/hdw-sniff.h
@@ -1 +1,5 @@
-/* empty */
+/* the pcap_process callback function */
+void pcap_process(u_char *count,const struct pcap_pkthdr *pcap_header,
+ const u_char *package);
+
+
--
2.39.5