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hping2

    1: /*
    2:  * $smu-mark$
    3:  * $name: memunlock.c$
    4:  * $other_author: Mika <mika@qualys.com>
    5:  * $other_copyright: Copyright (C) 1999 Mika <mika@qualys.com>
    6:  * $license: This software is under GPL version 2 of license$
    7:  * $date: Fri Nov  5 11:55:48 MET 1999$
    8:  * $rev: 2$
    9:  */
   10: 
   11: #include <stdio.h>
   12: #include <string.h>
   13: #include <sys/types.h>
   14: #include <netinet/in.h>
   15: #include <sys/socket.h>
   16: #include <arpa/inet.h>
   17:                      
   18: #include "hping2.h"
   19: #include "globals.h"
   20: 
   21: unsigned char ip_opt_build(char* ip_opt)
   22: {
   23: 	unsigned char optlen = 0;
   24: 	unsigned long ip;
   25: 
   26:     memset(ip_opt, 1, sizeof(ip_opt));
   27: 
   28:     if (opt_lsrr)
   29:     {
   30:         if (lsr_length<=39)
   31:         {
   32:             memcpy(ip_opt, &lsr, lsr_length);
   33:             optlen += lsr_length;
   34:         }
   35:         else
   36:         {
   37:             printf("Warning: loose source route is too long, discarding it");
   38:             opt_lsrr=0;
   39:         }
   40:     }
   41: 
   42:     if (opt_ssrr)
   43:     {
   44:         if (ssr_length+optlen<=39)
   45:         {
   46:             memcpy(ip_opt + optlen, &ssr, ssr_length);
   47:             optlen += ssr_length;
   48:         }
   49:         else
   50:         {
   51:             printf("Warning: strict source route is too long, discarding it");
   52:             opt_ssrr=0;
   53:         }
   54:     }
   55: 
   56: 	if (opt_rroute)
   57: 	{
   58:         if (optlen<=33)
   59:         {
   60:     		ip_opt[optlen]=IPOPT_RR;
   61:      		ip_opt[optlen+1]=39-optlen;
   62:     		ip_opt[optlen+2]=8;
   63:     		ip=inet_addr("1.2.3.4");
   64:     		memcpy(ip_opt+optlen+3,&ip,4);
   65:             optlen=39;
   66:         }
   67:         else
   68:         {
   69:             printf("Warning: no room for record route, discarding option\n");
   70:             opt_rroute=0;
   71:         }
   72: 	}
   73: 
   74:     if (optlen)
   75:     {
   76:         optlen = (optlen + 3) & ~3;
   77:         ip_opt[optlen-1] = 0;
   78:         return optlen;
   79:     }
   80:     else
   81:         return 0;
   82: }
   83: