From: hackbard <hackbard>
Date: Tue, 12 Nov 2002 18:54:00 +0000 (+0000)
Subject: improved ip stuff
X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fhdw-sniff.git;a=commitdiff_plain;h=a694777e91e8f0c54a9236a281653b191132e3dc

improved ip stuff
---

diff --git a/hdw-sniff.c b/hdw-sniff.c
index 94830b7..46892b5 100644
--- a/hdw-sniff.c
+++ b/hdw-sniff.c
@@ -123,18 +123,18 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header,
 	struct linux_wlan_ng_prism_hdr *prism_hdr;
 	struct ieee802_11_hdr *w_hdr;
 	struct ethhdr *e_hdr;
-	struct ip *ip_hdr;
+	struct iphdr *ip_hdr;
 	struct info_struct *my_info_struct;
 	int i,p_o,w_o,e_o,i_o;
 	
-	/* cache offsets */
-	p_o=sizeof(struct linux_wlan_ng_prism_hdr);
-	w_o=sizeof(struct ieee802_11_hdr);
-	e_o=sizeof(struct ethhdr);
-	i_o=sizeof(struct ip);
-
 	my_info_struct=(struct info_struct *)info;
 	++(my_info_struct->count);
+	
+	/* cache offsets */
+	p_o=((strncmp(my_info_struct->dev,"wlan",4)==0)?sizeof(struct linux_wlan_ng_prism_hdr):0);
+	w_o=((strncmp(my_info_struct->dev,"wlan",4)==0)?sizeof(struct ieee802_11_hdr):0);
+	e_o=sizeof(struct ethhdr);
+	i_o=sizeof(struct iphdr);
 
 	printf("\n");
 	printf("---> package %d ---- %s",my_info_struct->count,
@@ -175,7 +175,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header,
 
 	/* ieee802.3 */
 	/* ethernet */
-	printf("ethernet:\n");
+	printf("ethernet: (%d bytes)\n",e_o);
 	e_hdr=(struct ethhdr *)(package+p_o+w_o);
 	/* what types ? */
 	printf("type = ");
@@ -186,22 +186,35 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header,
 	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+p_o+w_o+e_o);
-		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("ip protocol: (%d bytes)\n",i_o);
+		ip_hdr=(struct iphdr *)(package+p_o+w_o+e_o);
+		printf("version = %x ",ntohs(ip_hdr->version));
+		printf("header_length = %x \n",ntohs(ip_hdr->ihl));
+		printf("service = %x ",ntohs(ip_hdr->tos));
+		printf("total_length(dec.) = %d \n",ntohs(ip_hdr->tot_len));
+		printf("source_ip: ");
+		for(i=3;i>=0;--i) {
+			printf("%d%s",
+			ip_hdr->saddr&0xff<<i,
+			(i==0?"\n":"."));
+		}
+		printf("destination_ip: ");
+		for(i=3;i>=0;--i) {
+			printf("%d%s",
+			ip_hdr->daddr&0xff<<i,
+			(i==0?"\n":"."));
+		}
+		// printf("ip_addresses: source = ");
+		// printf("%s\tdestination = %s\n",inet_ntoa(ip_hdr->saddr),
+		//				inet_ntoa(ip_hdr->daddr));
+		printf("ip_id = %x ",ntohs(ip_hdr->id));
+		printf("ip_offset = %x \n",ntohs(ip_hdr->frag_off));
+		printf("time2live = %x ip_proto = %x\n",ntohs(ip_hdr->ttl),
+						ntohs(ip_hdr->protocol));
+		// printf("chksum: %x\n",ntohs(ip_hdr->ip_sum));
 	}
 	printf("all ethernet dump:\n");
 	for(i=p_o+w_o+e_o;i<pcap_header->caplen;i++)
@@ -210,14 +223,14 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header,
 }
 
 int hop_channel(struct info_struct *info,int foo_fd) {
+	if((info->mmode-0x30==1) && (strncmp(info->dev,"wlan",4)==0)) {
+
 	struct iwreq my_iwreq;
 
 	if (info->channel>=14) info->channel=1;
 
 	memset(&my_iwreq,0,sizeof(my_iwreq));
 	strcpy(my_iwreq.ifr_name,info->dev);
-	printf("debug: device = %s\n",my_iwreq.ifr_name);
-	printf("debug: %d\n",foo_fd);
 	printf("debug: channel = %d\n",info->channel);
 	my_iwreq.u.freq.e=0;
 	my_iwreq.u.freq.m=info->channel;
@@ -226,7 +239,7 @@ int hop_channel(struct info_struct *info,int foo_fd) {
 		perror("ioctl");
 		return -1;
 	}
-	printf("debug: hopped to channel %d\n",info->channel);
 	++(info->channel);
+	}
 	return 0;
 }