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Diffstat (limited to 'net/ipv4/ip_masq_mod.c')
-rw-r--r--net/ipv4/ip_masq_mod.c322
1 files changed, 0 insertions, 322 deletions
diff --git a/net/ipv4/ip_masq_mod.c b/net/ipv4/ip_masq_mod.c
deleted file mode 100644
index 654ab9ff7..000000000
--- a/net/ipv4/ip_masq_mod.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- * IP_MASQ_MOD masq modules support
- *
- *
- * Author: Juan Jose Ciarlante, <jjciarla@raiz.uncu.edu.ar>
- *
- * $Id: ip_masq_mod.c,v 1.5 1998/08/29 23:51:09 davem Exp $
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- * Cyrus Durgin: fixed kerneld stuff for kmod.
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <net/ip_masq.h>
-#include <net/ip_masq_mod.h>
-
-#include <linux/ip_masq.h>
-#ifdef CONFIG_KMOD
-#include <linux/kmod.h>
-#endif
-
-EXPORT_SYMBOL(register_ip_masq_mod);
-EXPORT_SYMBOL(unregister_ip_masq_mod);
-EXPORT_SYMBOL(ip_masq_mod_lkp_link);
-EXPORT_SYMBOL(ip_masq_mod_lkp_unlink);
-
-static spinlock_t masq_mod_lock = SPIN_LOCK_UNLOCKED;
-
-/*
- * Base pointer for registered modules
- */
-struct ip_masq_mod * ip_masq_mod_reg_base = NULL;
-
-/*
- * Base pointer for lookup (subset of above, a module could be
- * registered, but it could have no active rule); will avoid
- * unnecessary lookups.
- */
-struct ip_masq_mod * ip_masq_mod_lkp_base = NULL;
-
-int ip_masq_mod_register_proc(struct ip_masq_mod *mmod)
-{
-#ifdef CONFIG_PROC_FS
- int ret;
-
- struct proc_dir_entry *ent = mmod->mmod_proc_ent;
-
- if (!ent)
- return 0;
- if (!ent->name) {
- ent->name = mmod->mmod_name;
- ent->namelen = strlen (mmod->mmod_name);
- }
- ret = ip_masq_proc_register(ent);
- if (ret) mmod->mmod_proc_ent = NULL;
-
- return ret;
-#else
- return 0;
-#endif
-}
-
-void ip_masq_mod_unregister_proc(struct ip_masq_mod *mmod)
-{
-#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *ent = mmod->mmod_proc_ent;
- if (!ent)
- return;
- ip_masq_proc_unregister(ent);
-#endif
-}
-
-/*
- * Link/unlink object for lookups
- */
-
-int ip_masq_mod_lkp_unlink(struct ip_masq_mod *mmod)
-{
- struct ip_masq_mod **mmod_p;
-
- write_lock_bh(&masq_mod_lock);
-
- for (mmod_p = &ip_masq_mod_lkp_base; *mmod_p ; mmod_p = &(*mmod_p)->next)
- if (mmod == (*mmod_p)) {
- *mmod_p = mmod->next;
- mmod->next = NULL;
- write_unlock_bh(&masq_mod_lock);
- return 0;
- }
-
- write_unlock_bh(&masq_mod_lock);
- return -EINVAL;
-}
-
-int ip_masq_mod_lkp_link(struct ip_masq_mod *mmod)
-{
- write_lock_bh(&masq_mod_lock);
-
- mmod->next = ip_masq_mod_lkp_base;
- ip_masq_mod_lkp_base=mmod;
-
- write_unlock_bh(&masq_mod_lock);
- return 0;
-}
-
-int register_ip_masq_mod(struct ip_masq_mod *mmod)
-{
- if (!mmod) {
- IP_MASQ_ERR("register_ip_masq_mod(): NULL arg\n");
- return -EINVAL;
- }
- if (!mmod->mmod_name) {
- IP_MASQ_ERR("register_ip_masq_mod(): NULL mmod_name\n");
- return -EINVAL;
- }
- ip_masq_mod_register_proc(mmod);
-
- mmod->next_reg = ip_masq_mod_reg_base;
- ip_masq_mod_reg_base=mmod;
-
- return 0;
-}
-
-int unregister_ip_masq_mod(struct ip_masq_mod *mmod)
-{
- struct ip_masq_mod **mmod_p;
-
- if (!mmod) {
- IP_MASQ_ERR( "unregister_ip_masq_mod(): NULL arg\n");
- return -EINVAL;
- }
-
- /*
- * Only allow unregistration if it is not referenced
- */
- if (atomic_read(&mmod->refcnt)) {
- IP_MASQ_ERR( "unregister_ip_masq_mod(): is in use by %d guys. failed\n",
- atomic_read(&mmod->refcnt));
- return -EINVAL;
- }
-
- /*
- * Must be already unlinked from lookup list
- */
- if (mmod->next) {
- IP_MASQ_WARNING("MASQ: unregistering \"%s\" while in lookup list.fixed.",
- mmod->mmod_name);
- ip_masq_mod_lkp_unlink(mmod);
- }
-
- for (mmod_p = &ip_masq_mod_reg_base; *mmod_p ; mmod_p = &(*mmod_p)->next_reg)
- if (mmod == (*mmod_p)) {
- ip_masq_mod_unregister_proc(mmod);
- *mmod_p = mmod->next_reg;
- return 0;
- }
-
- IP_MASQ_ERR("unregister_ip_masq_mod(%s): not linked \n", mmod->mmod_name);
- return -EINVAL;
-}
-
-int ip_masq_mod_in_rule(const struct sk_buff *skb, const struct iphdr *iph)
-{
- struct ip_masq_mod *mmod;
- int ret = IP_MASQ_MOD_NOP;
-
- for (mmod=ip_masq_mod_lkp_base;mmod;mmod=mmod->next) {
- if (!mmod->mmod_in_rule) continue;
- switch (ret=mmod->mmod_in_rule(skb, iph)) {
- case IP_MASQ_MOD_NOP:
- continue;
- case IP_MASQ_MOD_ACCEPT:
- case IP_MASQ_MOD_REJECT:
- goto out;
- }
- }
-out:
- return ret;
-}
-
-int ip_masq_mod_out_rule(const struct sk_buff *skb, const struct iphdr *iph)
-{
- struct ip_masq_mod *mmod;
- int ret = IP_MASQ_MOD_NOP;
-
- for (mmod=ip_masq_mod_lkp_base;mmod;mmod=mmod->next) {
- if (!mmod->mmod_out_rule) continue;
- switch (ret=mmod->mmod_out_rule(skb, iph)) {
- case IP_MASQ_MOD_NOP:
- continue;
- case IP_MASQ_MOD_ACCEPT:
- case IP_MASQ_MOD_REJECT:
- goto out;
- }
- }
-out:
- return ret;
-}
-
-struct ip_masq * ip_masq_mod_in_create(const struct sk_buff *skb, const struct iphdr *iph, __u32 maddr)
-{
- struct ip_masq_mod *mmod;
- struct ip_masq *ms = NULL;
-
- for (mmod=ip_masq_mod_lkp_base;mmod;mmod=mmod->next) {
- if (!mmod->mmod_in_create) continue;
- if ((ms=mmod->mmod_in_create(skb, iph, maddr))) {
- goto out;
- }
- }
-out:
- return ms;
-}
-
-struct ip_masq * ip_masq_mod_out_create(const struct sk_buff *skb, const struct iphdr *iph, __u32 maddr)
-{
- struct ip_masq_mod *mmod;
- struct ip_masq *ms = NULL;
-
- for (mmod=ip_masq_mod_lkp_base;mmod;mmod=mmod->next) {
- if (!mmod->mmod_out_create) continue;
- if ((ms=mmod->mmod_out_create(skb, iph, maddr))) {
- goto out;
- }
- }
-out:
- return ms;
-}
-
-int ip_masq_mod_in_update(const struct sk_buff *skb, const struct iphdr *iph, struct ip_masq *ms)
-{
- struct ip_masq_mod *mmod;
- int ret = IP_MASQ_MOD_NOP;
-
- for (mmod=ip_masq_mod_lkp_base;mmod;mmod=mmod->next) {
- if (!mmod->mmod_in_update) continue;
- switch (ret=mmod->mmod_in_update(skb, iph, ms)) {
- case IP_MASQ_MOD_NOP:
- continue;
- case IP_MASQ_MOD_ACCEPT:
- case IP_MASQ_MOD_REJECT:
- goto out;
- }
- }
-out:
- return ret;
-}
-
-int ip_masq_mod_out_update(const struct sk_buff *skb, const struct iphdr *iph, struct ip_masq *ms)
-{
- struct ip_masq_mod *mmod;
- int ret = IP_MASQ_MOD_NOP;
-
- for (mmod=ip_masq_mod_lkp_base;mmod;mmod=mmod->next) {
- if (!mmod->mmod_out_update) continue;
- switch (ret=mmod->mmod_out_update(skb, iph, ms)) {
- case IP_MASQ_MOD_NOP:
- continue;
- case IP_MASQ_MOD_ACCEPT:
- case IP_MASQ_MOD_REJECT:
- goto out;
- }
- }
-out:
- return ret;
-}
-
-struct ip_masq_mod * ip_masq_mod_getbyname(const char *mmod_name)
-{
- struct ip_masq_mod * mmod;
-
- IP_MASQ_DEBUG(1, "searching mmod_name \"%s\"\n", mmod_name);
-
- for (mmod=ip_masq_mod_reg_base; mmod ; mmod=mmod->next_reg) {
- if (mmod->mmod_ctl && *(mmod_name)
- && (strcmp(mmod_name, mmod->mmod_name)==0)) {
- /* HIT */
- return mmod;
- }
- }
- return NULL;
-}
-
-/*
- * Module control entry
- */
-int ip_masq_mod_ctl(int optname, struct ip_masq_ctl *mctl, int optlen)
-{
- struct ip_masq_mod * mmod;
-#ifdef CONFIG_KMOD
- char kmod_name[IP_MASQ_TNAME_MAX+8];
-#endif
- /* tappo */
- mctl->m_tname[IP_MASQ_TNAME_MAX-1] = 0;
-
- mmod = ip_masq_mod_getbyname(mctl->m_tname);
- if (mmod)
- return mmod->mmod_ctl(optname, mctl, optlen);
-#ifdef CONFIG_KMOD
- sprintf(kmod_name,"ip_masq_%s", mctl->m_tname);
-
- IP_MASQ_DEBUG(1, "About to request \"%s\" module\n", kmod_name);
-
- /*
- * Let sleep for a while ...
- */
- request_module(kmod_name);
- mmod = ip_masq_mod_getbyname(mctl->m_tname);
- if (mmod)
- return mmod->mmod_ctl(optname, mctl, optlen);
-#endif
- return ESRCH;
-}
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