Annotation of embedaddon/hping2/sendip_handler.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $smu-mark$
! 3: * $name: sendip_handler.c$
! 4: * $author: Salvatore Sanfilippo <antirez@invece.org>$
! 5: * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
! 6: * $license: This software is under GPL version 2 of license$
! 7: * $date: Fri Nov 5 11:55:49 MET 1999$
! 8: * $rev: 3$
! 9: */
! 10:
! 11: #include <stdio.h>
! 12:
! 13: #include "hping2.h"
! 14: #include "globals.h"
! 15:
! 16: void send_ip_handler(char *packet, unsigned int size)
! 17: {
! 18: ip_optlen = ip_opt_build(ip_opt);
! 19:
! 20: if (!opt_fragment && (size+ip_optlen+20 >= h_if_mtu))
! 21: {
! 22: /* auto-activate fragmentation */
! 23: virtual_mtu = h_if_mtu-20;
! 24: virtual_mtu = virtual_mtu - (virtual_mtu % 8);
! 25: opt_fragment = TRUE;
! 26: opt_mf = opt_df = FALSE; /* deactivate incompatible options */
! 27: if (opt_verbose || opt_debug)
! 28: printf("auto-activate fragmentation, fragments size: %d\n", virtual_mtu);
! 29: }
! 30:
! 31: if (!opt_fragment)
! 32: {
! 33: unsigned short fragment_flag = 0;
! 34:
! 35: if (opt_mf) fragment_flag |= MF; /* more fragments */
! 36: if (opt_df) fragment_flag |= DF; /* dont fragment */
! 37: send_ip((char*)&local.sin_addr,
! 38: (char*)&remote.sin_addr,
! 39: packet, size, fragment_flag, ip_frag_offset,
! 40: ip_opt, ip_optlen);
! 41: }
! 42: else
! 43: {
! 44: unsigned int remainder = size;
! 45: int frag_offset = 0;
! 46:
! 47: while(1) {
! 48: if (remainder <= virtual_mtu)
! 49: break;
! 50:
! 51: send_ip((char*)&local.sin_addr,
! 52: (char*)&remote.sin_addr,
! 53: packet+frag_offset,
! 54: virtual_mtu, MF, frag_offset,
! 55: ip_opt, ip_optlen);
! 56:
! 57: remainder-=virtual_mtu;
! 58: frag_offset+=virtual_mtu;
! 59: }
! 60:
! 61: send_ip((char*)&local.sin_addr,
! 62: (char*)&remote.sin_addr,
! 63: packet+frag_offset,
! 64: remainder, NF, frag_offset,
! 65: ip_opt, ip_optlen);
! 66: }
! 67: }
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