Deleted Added
full compact
alias_irc.c (145932) alias_irc.c (147623)
1/*-
2 * Copyright (c) 2001 Charles Mott <cm@linktel.net>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2001 Charles Mott <cm@linktel.net>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/netinet/libalias/alias_irc.c 145932 2005-05-05 21:55:17Z glebius $");
28__FBSDID("$FreeBSD: head/sys/netinet/libalias/alias_irc.c 147623 2005-06-27 07:36:02Z glebius $");
29
30/* Alias_irc.c intercepts packages contain IRC CTCP commands, and
31 changes DCC commands to export a port on the aliasing host instead
32 of an aliased host.
33
34 For this routine to work, the DCC command must fit entirely into a
35 single TCP packet. This will usually happen, but is not
36 guaranteed.

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369 &new_len,
370 &pip->ip_len,
371 1);
372 pip->ip_len = new_len;
373 }
374
375 /* Compute TCP checksum for revised packet */
376 tc->th_sum = 0;
29
30/* Alias_irc.c intercepts packages contain IRC CTCP commands, and
31 changes DCC commands to export a port on the aliasing host instead
32 of an aliased host.
33
34 For this routine to work, the DCC command must fit entirely into a
35 single TCP packet. This will usually happen, but is not
36 guaranteed.

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369 &new_len,
370 &pip->ip_len,
371 1);
372 pip->ip_len = new_len;
373 }
374
375 /* Compute TCP checksum for revised packet */
376 tc->th_sum = 0;
377#ifdef _KERNEL
378 tc->th_x2 = 1;
379#else
377 tc->th_sum = TcpChecksum(pip);
380 tc->th_sum = TcpChecksum(pip);
381#endif
378 return;
379 }
380}
381
382/* Notes:
383 [Note 1]
384 The initial search will most often fail; it could be replaced with a 32-bit specific search.
385 Such a search would be done for 32-bit unsigned value V:

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382 return;
383 }
384}
385
386/* Notes:
387 [Note 1]
388 The initial search will most often fail; it could be replaced with a 32-bit specific search.
389 Such a search would be done for 32-bit unsigned value V:

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