summaryrefslogtreecommitdiff
path: root/net/decnet/dn_rules.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/decnet/dn_rules.c')
-rw-r--r--net/decnet/dn_rules.c253
1 files changed, 0 insertions, 253 deletions
diff --git a/net/decnet/dn_rules.c b/net/decnet/dn_rules.c
deleted file mode 100644
index ee73057529cf..000000000000
--- a/net/decnet/dn_rules.c
+++ /dev/null
@@ -1,253 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Routing Forwarding Information Base (Rules)
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- * Mostly copied from Alexey Kuznetsov's ipv4/fib_rules.c
- *
- *
- * Changes:
- * Steve Whitehouse <steve@chygwyn.com>
- * Updated for Thomas Graf's generic rules
- *
- */
-#include <linux/net.h>
-#include <linux/init.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <linux/netdevice.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/rcupdate.h>
-#include <linux/export.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-static struct fib_rules_ops *dn_fib_rules_ops;
-
-struct dn_fib_rule
-{
- struct fib_rule common;
- unsigned char dst_len;
- unsigned char src_len;
- __le16 src;
- __le16 srcmask;
- __le16 dst;
- __le16 dstmask;
- __le16 srcmap;
- u8 flags;
-};
-
-
-int dn_fib_lookup(struct flowidn *flp, struct dn_fib_res *res)
-{
- struct fib_lookup_arg arg = {
- .result = res,
- };
- int err;
-
- err = fib_rules_lookup(dn_fib_rules_ops,
- flowidn_to_flowi(flp), 0, &arg);
- res->r = arg.rule;
-
- return err;
-}
-
-static int dn_fib_rule_action(struct fib_rule *rule, struct flowi *flp,
- int flags, struct fib_lookup_arg *arg)
-{
- struct flowidn *fld = &flp->u.dn;
- int err = -EAGAIN;
- struct dn_fib_table *tbl;
-
- switch(rule->action) {
- case FR_ACT_TO_TBL:
- break;
-
- case FR_ACT_UNREACHABLE:
- err = -ENETUNREACH;
- goto errout;
-
- case FR_ACT_PROHIBIT:
- err = -EACCES;
- goto errout;
-
- case FR_ACT_BLACKHOLE:
- default:
- err = -EINVAL;
- goto errout;
- }
-
- tbl = dn_fib_get_table(rule->table, 0);
- if (tbl == NULL)
- goto errout;
-
- err = tbl->lookup(tbl, fld, (struct dn_fib_res *)arg->result);
- if (err > 0)
- err = -EAGAIN;
-errout:
- return err;
-}
-
-static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
-{
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
- struct flowidn *fld = &fl->u.dn;
- __le16 daddr = fld->daddr;
- __le16 saddr = fld->saddr;
-
- if (((saddr ^ r->src) & r->srcmask) ||
- ((daddr ^ r->dst) & r->dstmask))
- return 0;
-
- return 1;
-}
-
-static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
- struct fib_rule_hdr *frh,
- struct nlattr **tb,
- struct netlink_ext_ack *extack)
-{
- int err = -EINVAL;
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
- if (frh->tos) {
- NL_SET_ERR_MSG(extack, "Invalid tos value");
- goto errout;
- }
-
- if (rule->table == RT_TABLE_UNSPEC) {
- if (rule->action == FR_ACT_TO_TBL) {
- struct dn_fib_table *table;
-
- table = dn_fib_empty_table();
- if (table == NULL) {
- err = -ENOBUFS;
- goto errout;
- }
-
- rule->table = table->n;
- }
- }
-
- if (frh->src_len)
- r->src = nla_get_le16(tb[FRA_SRC]);
-
- if (frh->dst_len)
- r->dst = nla_get_le16(tb[FRA_DST]);
-
- r->src_len = frh->src_len;
- r->srcmask = dnet_make_mask(r->src_len);
- r->dst_len = frh->dst_len;
- r->dstmask = dnet_make_mask(r->dst_len);
- err = 0;
-errout:
- return err;
-}
-
-static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
- struct nlattr **tb)
-{
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
- if (frh->src_len && (r->src_len != frh->src_len))
- return 0;
-
- if (frh->dst_len && (r->dst_len != frh->dst_len))
- return 0;
-
- if (frh->src_len && (r->src != nla_get_le16(tb[FRA_SRC])))
- return 0;
-
- if (frh->dst_len && (r->dst != nla_get_le16(tb[FRA_DST])))
- return 0;
-
- return 1;
-}
-
-unsigned int dnet_addr_type(__le16 addr)
-{
- struct flowidn fld = { .daddr = addr };
- struct dn_fib_res res;
- unsigned int ret = RTN_UNICAST;
- struct dn_fib_table *tb = dn_fib_get_table(RT_TABLE_LOCAL, 0);
-
- res.r = NULL;
-
- if (tb) {
- if (!tb->lookup(tb, &fld, &res)) {
- ret = res.type;
- dn_fib_res_put(&res);
- }
- }
- return ret;
-}
-
-static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
- struct fib_rule_hdr *frh)
-{
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
- frh->dst_len = r->dst_len;
- frh->src_len = r->src_len;
- frh->tos = 0;
-
- if ((r->dst_len &&
- nla_put_le16(skb, FRA_DST, r->dst)) ||
- (r->src_len &&
- nla_put_le16(skb, FRA_SRC, r->src)))
- goto nla_put_failure;
- return 0;
-
-nla_put_failure:
- return -ENOBUFS;
-}
-
-static void dn_fib_rule_flush_cache(struct fib_rules_ops *ops)
-{
- dn_rt_cache_flush(-1);
-}
-
-static const struct fib_rules_ops __net_initconst dn_fib_rules_ops_template = {
- .family = AF_DECnet,
- .rule_size = sizeof(struct dn_fib_rule),
- .addr_size = sizeof(u16),
- .action = dn_fib_rule_action,
- .match = dn_fib_rule_match,
- .configure = dn_fib_rule_configure,
- .compare = dn_fib_rule_compare,
- .fill = dn_fib_rule_fill,
- .flush_cache = dn_fib_rule_flush_cache,
- .nlgroup = RTNLGRP_DECnet_RULE,
- .owner = THIS_MODULE,
- .fro_net = &init_net,
-};
-
-void __init dn_fib_rules_init(void)
-{
- dn_fib_rules_ops =
- fib_rules_register(&dn_fib_rules_ops_template, &init_net);
- BUG_ON(IS_ERR(dn_fib_rules_ops));
- BUG_ON(fib_default_rule_add(dn_fib_rules_ops, 0x7fff,
- RT_TABLE_MAIN, 0));
-}
-
-void __exit dn_fib_rules_cleanup(void)
-{
- rtnl_lock();
- fib_rules_unregister(dn_fib_rules_ops);
- rtnl_unlock();
- rcu_barrier();
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 05:01:44 +0000