Annotation of embedaddon/hping2/sendip_handler.c, revision 1.1.1.1
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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