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author | glebius <glebius@FreeBSD.org> | 2012-09-14 11:51:49 +0000 |
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committer | glebius <glebius@FreeBSD.org> | 2012-09-14 11:51:49 +0000 |
commit | 0ccf4838d7a8b4da2c3beaac7ea1fd977aa0ed11 (patch) | |
tree | ec60da6e90cde2e87aa91ac9450c84ce3446233a /sys/netpfil/pf/in4_cksum.c | |
parent | f99fc207edf21e7c05c1147864077ce3fe1f3e2c (diff) | |
download | FreeBSD-src-0ccf4838d7a8b4da2c3beaac7ea1fd977aa0ed11.zip FreeBSD-src-0ccf4838d7a8b4da2c3beaac7ea1fd977aa0ed11.tar.gz |
o Create directory sys/netpfil, where all packet filters should
reside, and move there ipfw(4) and pf(4).
o Move most modified parts of pf out of contrib.
Actual movements:
sys/contrib/pf/net/*.c -> sys/netpfil/pf/
sys/contrib/pf/net/*.h -> sys/net/
contrib/pf/pfctl/*.c -> sbin/pfctl
contrib/pf/pfctl/*.h -> sbin/pfctl
contrib/pf/pfctl/pfctl.8 -> sbin/pfctl
contrib/pf/pfctl/*.4 -> share/man/man4
contrib/pf/pfctl/*.5 -> share/man/man5
sys/netinet/ipfw -> sys/netpfil/ipfw
The arguable movement is pf/net/*.h -> sys/net. There are
future plans to refactor pf includes, so I decided not to
break things twice.
Not modified bits of pf left in contrib: authpf, ftp-proxy,
tftp-proxy, pflogd.
The ipfw(4) movement is planned to be merged to stable/9,
to make head and stable match.
Discussed with: bz, luigi
Diffstat (limited to 'sys/netpfil/pf/in4_cksum.c')
-rw-r--r-- | sys/netpfil/pf/in4_cksum.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/sys/netpfil/pf/in4_cksum.c b/sys/netpfil/pf/in4_cksum.c new file mode 100644 index 0000000..bf25baf --- /dev/null +++ b/sys/netpfil/pf/in4_cksum.c @@ -0,0 +1,120 @@ +/* $FreeBSD$ */ +/* $OpenBSD: in4_cksum.c,v 1.7 2003/06/02 23:28:13 millert Exp $ */ +/* $KAME: in4_cksum.c,v 1.10 2001/11/30 10:06:15 itojun Exp $ */ +/* $NetBSD: in_cksum.c,v 1.13 1996/10/13 02:03:03 christos Exp $ */ + +/* + * Copyright (C) 1999 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Copyright (c) 1988, 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)in_cksum.c 8.1 (Berkeley) 6/10/93 + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/mbuf.h> + +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netinet/ip_var.h> + +#include <machine/in_cksum.h> + +#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x) +#define REDUCE {l_util.l = sum; sum = l_util.s[0] + l_util.s[1]; (void)ADDCARRY(sum);} + +int in4_cksum(struct mbuf *, u_int8_t, int, int); + +int +in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len) +{ + union { + struct ipovly ipov; + u_int16_t w[10]; + } u; + union { + u_int16_t s[2]; + u_int32_t l; + } l_util; + + u_int16_t *w; + int psum; + int sum = 0; + + if (nxt != 0) { + /* pseudo header */ + if (off < sizeof(struct ipovly)) + panic("in4_cksum: offset too short"); + if (m->m_len < sizeof(struct ip)) + panic("in4_cksum: bad mbuf chain"); + bzero(&u.ipov, sizeof(u.ipov)); + u.ipov.ih_len = htons(len); + u.ipov.ih_pr = nxt; + u.ipov.ih_src = mtod(m, struct ip *)->ip_src; + u.ipov.ih_dst = mtod(m, struct ip *)->ip_dst; + w = u.w; + /* assumes sizeof(ipov) == 20 */ + sum += w[0]; sum += w[1]; sum += w[2]; sum += w[3]; sum += w[4]; + sum += w[5]; sum += w[6]; sum += w[7]; sum += w[8]; sum += w[9]; + } + + psum = in_cksum_skip(m, len + off, off); + psum = ~psum & 0xffff; + sum += psum; + REDUCE; + return (~sum & 0xffff); +} |