fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
175 lines
4.0 KiB
C
175 lines
4.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2005 Paolo Pisati <piso@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef _KERNEL
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#include <sys/libkern.h>
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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#else
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <errno.h>
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#endif
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#ifdef _KERNEL
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#include <netinet/libalias/alias_local.h>
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#include <netinet/libalias/alias_mod.h>
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#else
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#include "alias_local.h"
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#include "alias_mod.h"
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#endif
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/* Protocol and userland module handlers chains. */
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static TAILQ_HEAD(handler_chain, proto_handler) handler_chain =
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TAILQ_HEAD_INITIALIZER(handler_chain);
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static int
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attach_handler(struct proto_handler *p)
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{
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struct proto_handler *b;
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TAILQ_FOREACH(b, &handler_chain, link) {
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if ((b->pri == p->pri) &&
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(b->dir == p->dir) &&
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(b->proto == p->proto))
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return (EEXIST);
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if (b->pri > p->pri) {
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TAILQ_INSERT_BEFORE(b, p, link);
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return (0);
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}
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}
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TAILQ_INSERT_TAIL(&handler_chain, p, link);
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return (0);
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}
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int
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LibAliasAttachHandlers(struct proto_handler *p)
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{
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int error;
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while (p->dir != NODIR) {
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error = attach_handler(p);
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if (error)
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return (error);
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p++;
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}
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return (0);
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}
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/* XXXGL: should be void, but no good reason to break ABI */
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int
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LibAliasDetachHandlers(struct proto_handler *p)
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{
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while (p->dir != NODIR) {
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TAILQ_REMOVE(&handler_chain, p, link);
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p++;
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}
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return (0);
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}
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int
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find_handler(int8_t dir, int8_t proto, struct libalias *la, struct ip *ip,
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struct alias_data *ad)
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{
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struct proto_handler *p;
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TAILQ_FOREACH(p, &handler_chain, link)
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if ((p->dir & dir) && (p->proto & proto) &&
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p->fingerprint(la, ad) == 0)
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return (p->protohandler(la, ip, ad));
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return (ENOENT);
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}
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struct proto_handler *
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first_handler(void)
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{
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return (TAILQ_FIRST(&handler_chain));
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}
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#ifndef _KERNEL
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/* Dll manipulation code - this code is not thread safe... */
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SLIST_HEAD(dll_chain, dll) dll_chain = SLIST_HEAD_INITIALIZER(dll_chain);
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int
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attach_dll(struct dll *p)
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{
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struct dll *b;
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SLIST_FOREACH(b, &dll_chain, next) {
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if (!strncmp(b->name, p->name, DLL_LEN))
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return (EEXIST); /* Dll name conflict. */
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}
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SLIST_INSERT_HEAD(&dll_chain, p, next);
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return (0);
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}
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void *
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detach_dll(char *p)
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{
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struct dll *b, *b_tmp;
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void *error;
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b = NULL;
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error = NULL;
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SLIST_FOREACH_SAFE(b, &dll_chain, next, b_tmp)
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if (!strncmp(b->name, p, DLL_LEN)) {
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SLIST_REMOVE(&dll_chain, b, dll, next);
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error = b;
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break;
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}
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return (error);
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}
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struct dll *
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walk_dll_chain(void)
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{
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struct dll *t;
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t = SLIST_FIRST(&dll_chain);
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if (t == NULL)
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return (NULL);
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SLIST_REMOVE_HEAD(&dll_chain, next);
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return (t);
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}
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#endif /* !_KERNEL */
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