+
+int parse_ip(char *ip_o) {
+ struct iphdr *ip_hdr;
+ int i;
+
+ printf("ip protocol:\n");
+ ip_hdr=(struct iphdr *)ip_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=0;i<=3;++i) {
+ printf("%d%s",
+ (ip_hdr->saddr&(0xff<<(8*i)))>>(8*i),
+ (i==3?"\n":"."));
+ }
+ printf("destination_ip: ");
+ for(i=0;i<=3;++i) {
+ printf("%d%s",
+ (ip_hdr->daddr&(0xff<<(8*i)))>>(8*i),
+ (i==3?"\n":"."));
+ }
+ 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));
+}