improved ip stuff

diff --git a/hdw-sniff.c b/hdw-sniff.c
index 94830b7..46892b5 100644 (file)
--- 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;
 }