d898109ed6
Changes:
- don't install hping suid root by default, add "hping-suid" option.
- add bunch on patches from Pavel Kankovsky <peak at argo.troja.mff.cuni.cz>
namely: add --flood and --tcp-mss options (self-explanatory), some checksum
and interface binding fixes and warning fixes
2.0.0rc3:
=======
FIX: Fix for interface guessing with aliases on BSD
Thanks <michel.gravey(@)orange.fr> and <cognet(@)freebsd.org>
FIX: fixed cksum.c. Bad outgoing packet checksum with some packet.
Thanks to Brett Eldridge <beldridg@pobox.com>.
ADD: scan mode (--scan)
ADD: A rc4-based PRNG to use with --rand-source and --rand-dest
FIX: Fix -I option for BSD/Apple
ADD: Add support for BSDI and MacOSX (thanks
Dennis Opacki <dopacki@adotout.com> and Jan-Hinrich Fessel
<Jan-Hinrich.Fessel@T-Mobile.de>)
ADD: A few useful ICMP options
ADD: Add support for :
WLAN (Fabian Melzow <biop0b@web.de>)
ATM (Debian bug #193436, thanks to Domenico Andreoli)
Token Ring (jim.r.halfpenny@britishairways.com)
ADD: MacOSX patches (Hans-Joachim Knobloch <knobloch@secorvo.de>)
FIX: --rand-source patches from Quentin Garnier <hping@quatriemek.com>
. ensure randomness
. do not stop on errors when using a E or D class address (BSD only?)
78 lines
2.2 KiB
Text
78 lines
2.2 KiB
Text
$NetBSD: patch-af,v 1.1 2006/03/30 13:51:29 salo Exp $
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--- ars.c.orig 2003-07-28 11:00:54.000000000 +0200
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+++ ars.c 2005-11-05 21:35:00.000000000 +0100
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@@ -372,7 +372,7 @@
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}
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if (nbytes == 1) {
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oddbyte = 0;
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- *((u_int16_t *) &oddbyte) = *(u_int8_t *) buf;
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+ *((u_int8_t *) &oddbyte) = *((u_int8_t *) buf);
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sum += oddbyte;
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}
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sum = (sum >> 16) + (sum & 0xffff);
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@@ -381,6 +381,13 @@
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}
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/* Multiple buffers checksum facility */
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+/*
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+ * Important facts about the checksum (sum = ~cksum, Ai are bytes):
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+ * 1. sum(A0...A2i-1,A2i...A2n-1) = sum(A0...A2i-1) + sum(A2i...B2n-1),
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+ * 2. sum(A0...A2i,A2i+1...A2n-1) = sum(A0...A2i,0) + sum(0,A2i+1...A2n-1)
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+ * 3. sum(A0...A2n-1,A2n) = sum(A0...A2n-1,A2n,0) (ex definitiones)
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+ * 4. sum(0,A0...Ak) = swap_bytes(sum(A0...Ak))
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+ */
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u_int16_t ars_multi_cksum(struct mc_context *c, int op, void *vbuf,
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size_t nbytes)
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{
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@@ -394,38 +401,27 @@
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c->old = 0;
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return -ARS_OK;
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} else if (op == ARS_MC_UPDATE) {
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- if (c->oddbyte_flag) {
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- u_int8_t *x = (u_int8_t*)&oddbyte;
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- oddbyte = 0;
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- *((u_int16_t *) &oddbyte) = c->oddbyte << 8;
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- *((u_int16_t *) &oddbyte) |= *(u_int8_t *) buf;
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- oddbyte = (x[0] << 8) | x[1]; /* fix endianess */
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- c->old += oddbyte;
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- nbytes--;
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- c->oddbyte_flag = 0;
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- /* We need to stay aligned -- bad slowdown, fix? */
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- tmp = alloca(nbytes);
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- memcpy(tmp, vbuf+1, nbytes);
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- buf = tmp;
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- }
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- sum = c->old;
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+ sum = 0;
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while (nbytes > 1) {
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sum += *buf++;
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nbytes -= 2;
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}
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- c->old = sum;
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if (nbytes == 1) {
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- c->oddbyte = *(u_int8_t*) buf;
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- c->oddbyte_flag++;
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+ oddbyte = 0;
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+ *((u_int8_t *) &oddbyte) = *((u_int8_t *) buf);
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+ sum += oddbyte;
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}
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+ if (c->oddbyte_flag) {
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+ /* reverse checksum endianness */
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+ sum = (sum >> 16) + (sum & 0xffff);
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+ sum += (sum >> 16);
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+ sum = ((sum & 0xff00) >> 8) | ((sum & 0xff) << 8);
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+ }
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+ c->old += sum;
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+ c->oddbyte_flag ^= (nbytes == 1 ? 1 : 0);
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return -ARS_OK;
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} else if (op == ARS_MC_FINAL) {
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sum = c->old;
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- if (c->oddbyte_flag == 1) {
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- oddbyte = 0;
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- *((u_int16_t *) &oddbyte) = c->oddbyte;
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- sum += oddbyte;
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- }
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sum = (sum >> 16) + (sum & 0xffff);
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sum += (sum >> 16);
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return (u_int16_t) ~sum;
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