diff options
Diffstat (limited to 'sys/netipx/ipx_cksum.c')
| -rw-r--r-- | sys/netipx/ipx_cksum.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/sys/netipx/ipx_cksum.c b/sys/netipx/ipx_cksum.c deleted file mode 100644 index 6aa87fb..0000000 --- a/sys/netipx/ipx_cksum.c +++ /dev/null @@ -1,140 +0,0 @@ -/*- - * Copyright (c) 1982, 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. - * 4. 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. - * - * Copyright (c) 1995, Mike Mitchell - * - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. 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. - * - * @(#)ipx_cksum.c - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/mbuf.h> -#include <sys/libkern.h> - -#include <netipx/ipx.h> -#include <netipx/ipx_var.h> - - -#define SUMADV sum += *w++ - -u_short -ipx_cksum(struct mbuf *m, int len) -{ - u_int32_t sum = 0; - u_char *w; - u_char oldtc; - int mlen, words; - struct ipx *ipx; - union { - u_char b[2]; - u_short w; - } buf; - - ipx = mtod(m, struct ipx*); - oldtc = ipx->ipx_tc; - ipx->ipx_tc = 0; - w = (u_char *)&ipx->ipx_len; - len -= 2; - mlen = 2; - - for(;;) { - mlen = imin(m->m_len - mlen, len); - words = mlen / 2; - len -= mlen & ~1; - while (words >= 16) { - SUMADV; SUMADV; SUMADV; SUMADV; - SUMADV; SUMADV; SUMADV; SUMADV; - SUMADV; SUMADV; SUMADV; SUMADV; - SUMADV; SUMADV; SUMADV; SUMADV; - words -= 16; - } - while (words--) - SUMADV; - if (len == 0) - break; - mlen &= 1; - if (mlen) { - buf.b[0] = *w; - if (--len == 0) { - buf.b[1] = 0; - sum += buf.w; - break; - } - } - m = m->m_next; - if (m == NULL) - break; - w = mtod(m, u_char *); - if (mlen) { - buf.b[1] = *w; - sum += buf.w; - w++; - if (--len == 0) - break; - } - } - - ipx->ipx_tc = oldtc; - - sum = (sum & 0xffff) + (sum >> 16); - if (sum >= 0x10000) - sum++; - if (sum) - sum = ~sum; - return (sum); -} |
