diff options
Diffstat (limited to 'net/ipv4/netfilter')
51 files changed, 743 insertions, 1291 deletions
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index ef0b5aa..a55b8ff 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -278,17 +278,6 @@ config IP_NF_MATCH_ECN To compile it as a module, choose M here. If unsure, say N. -config IP_NF_MATCH_DSCP - tristate "DSCP match support" - depends on IP_NF_IPTABLES - help - This option adds a `DSCP' match, which allows you to match against - the IPv4 header DSCP field (DSCP codepoint). - - The DSCP codepoint can have any value between 0x0 and 0x4f. - - To compile it as a module, choose M here. If unsure, say N. - config IP_NF_MATCH_AH tristate "AH match support" depends on IP_NF_IPTABLES @@ -568,17 +557,6 @@ config IP_NF_TARGET_ECN To compile it as a module, choose M here. If unsure, say N. -config IP_NF_TARGET_DSCP - tristate "DSCP target support" - depends on IP_NF_MANGLE - help - This option adds a `DSCP' match, which allows you to match against - the IPv4 header DSCP field (DSCP codepoint). - - The DSCP codepoint can have any value between 0x0 and 0x4f. - - To compile it as a module, choose M here. If unsure, say N. - config IP_NF_TARGET_TTL tristate 'TTL target support' depends on IP_NF_MANGLE diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile index 3ded4a3..09aaed1 100644 --- a/net/ipv4/netfilter/Makefile +++ b/net/ipv4/netfilter/Makefile @@ -59,7 +59,6 @@ obj-$(CONFIG_IP_NF_MATCH_OWNER) += ipt_owner.o obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o -obj-$(CONFIG_IP_NF_MATCH_DSCP) += ipt_dscp.o obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o @@ -68,7 +67,6 @@ obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o -obj-$(CONFIG_IP_NF_TARGET_DSCP) += ipt_DSCP.o obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index 8d1d7a6..85f0d73 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -56,8 +56,6 @@ do { \ #define ARP_NF_ASSERT(x) #endif -#include <linux/netfilter_ipv4/listhelp.h> - static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap, char *hdr_addr, int len) { @@ -208,8 +206,7 @@ static unsigned int arpt_error(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { if (net_ratelimit()) printk("arp_tables: error: '%s'\n", (char *)targinfo); @@ -226,8 +223,7 @@ unsigned int arpt_do_table(struct sk_buff **pskb, unsigned int hook, const struct net_device *in, const struct net_device *out, - struct arpt_table *table, - void *userdata) + struct arpt_table *table) { static const char nulldevname[IFNAMSIZ]; unsigned int verdict = NF_DROP; @@ -302,8 +298,7 @@ unsigned int arpt_do_table(struct sk_buff **pskb, in, out, hook, t->u.kernel.target, - t->data, - userdata); + t->data); /* Target might have changed stuff. */ arp = (*pskb)->nh.arph; @@ -490,12 +485,10 @@ static inline int check_entry(struct arpt_entry *e, const char *name, unsigned i if (t->u.kernel.target == &arpt_standard_target) { if (!standard_check(t, size)) { ret = -EINVAL; - goto out; + goto err; } } else if (t->u.kernel.target->checkentry && !t->u.kernel.target->checkentry(name, e, target, t->data, - t->u.target_size - - sizeof(*t), e->comefrom)) { duprintf("arp_tables: check failed for `%s'.\n", t->u.kernel.target->name); @@ -562,8 +555,7 @@ static inline int cleanup_entry(struct arpt_entry *e, unsigned int *i) t = arpt_get_target(e); if (t->u.kernel.target->destroy) - t->u.kernel.target->destroy(t->u.kernel.target, t->data, - t->u.target_size - sizeof(*t)); + t->u.kernel.target->destroy(t->u.kernel.target, t->data); module_put(t->u.kernel.target->me); return 0; } diff --git a/net/ipv4/netfilter/arpt_mangle.c b/net/ipv4/netfilter/arpt_mangle.c index a58325c..d12b1df 100644 --- a/net/ipv4/netfilter/arpt_mangle.c +++ b/net/ipv4/netfilter/arpt_mangle.c @@ -11,7 +11,7 @@ static unsigned int target(struct sk_buff **pskb, const struct net_device *in, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, void *userinfo) + const void *targinfo) { const struct arpt_mangle *mangle = targinfo; struct arphdr *arp; @@ -67,7 +67,7 @@ target(struct sk_buff **pskb, static int checkentry(const char *tablename, const void *e, const struct xt_target *target, - void *targinfo, unsigned int targinfosize, unsigned int hook_mask) + void *targinfo, unsigned int hook_mask) { const struct arpt_mangle *mangle = targinfo; diff --git a/net/ipv4/netfilter/arptable_filter.c b/net/ipv4/netfilter/arptable_filter.c index d7c472f..7edea2a 100644 --- a/net/ipv4/netfilter/arptable_filter.c +++ b/net/ipv4/netfilter/arptable_filter.c @@ -155,7 +155,7 @@ static unsigned int arpt_hook(unsigned int hook, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return arpt_do_table(pskb, hook, in, out, &packet_filter, NULL); + return arpt_do_table(pskb, hook, in, out, &packet_filter); } static struct nf_hook_ops arpt_ops[] = { diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c index aa45917..c432b31 100644 --- a/net/ipv4/netfilter/ip_conntrack_core.c +++ b/net/ipv4/netfilter/ip_conntrack_core.c @@ -47,7 +47,6 @@ #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> #include <linux/netfilter_ipv4/ip_conntrack_helper.h> #include <linux/netfilter_ipv4/ip_conntrack_core.h> -#include <linux/netfilter_ipv4/listhelp.h> #define IP_CONNTRACK_VERSION "2.4" @@ -64,17 +63,17 @@ atomic_t ip_conntrack_count = ATOMIC_INIT(0); void (*ip_conntrack_destroyed)(struct ip_conntrack *conntrack) = NULL; LIST_HEAD(ip_conntrack_expect_list); -struct ip_conntrack_protocol *ip_ct_protos[MAX_IP_CT_PROTO]; +struct ip_conntrack_protocol *ip_ct_protos[MAX_IP_CT_PROTO] __read_mostly; static LIST_HEAD(helpers); -unsigned int ip_conntrack_htable_size = 0; -int ip_conntrack_max; -struct list_head *ip_conntrack_hash; +unsigned int ip_conntrack_htable_size __read_mostly = 0; +int ip_conntrack_max __read_mostly; +struct list_head *ip_conntrack_hash __read_mostly; static kmem_cache_t *ip_conntrack_cachep __read_mostly; static kmem_cache_t *ip_conntrack_expect_cachep __read_mostly; struct ip_conntrack ip_conntrack_untracked; -unsigned int ip_ct_log_invalid; +unsigned int ip_ct_log_invalid __read_mostly; static LIST_HEAD(unconfirmed); -static int ip_conntrack_vmalloc; +static int ip_conntrack_vmalloc __read_mostly; static unsigned int ip_conntrack_next_id; static unsigned int ip_conntrack_expect_next_id; @@ -294,15 +293,10 @@ void ip_ct_remove_expectations(struct ip_conntrack *ct) static void clean_from_lists(struct ip_conntrack *ct) { - unsigned int ho, hr; - DEBUGP("clean_from_lists(%p)\n", ct); ASSERT_WRITE_LOCK(&ip_conntrack_lock); - - ho = hash_conntrack(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple); - hr = hash_conntrack(&ct->tuplehash[IP_CT_DIR_REPLY].tuple); - LIST_DELETE(&ip_conntrack_hash[ho], &ct->tuplehash[IP_CT_DIR_ORIGINAL]); - LIST_DELETE(&ip_conntrack_hash[hr], &ct->tuplehash[IP_CT_DIR_REPLY]); + list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list); + list_del(&ct->tuplehash[IP_CT_DIR_REPLY].list); /* Destroy all pending expectations */ ip_ct_remove_expectations(ct); @@ -313,6 +307,7 @@ destroy_conntrack(struct nf_conntrack *nfct) { struct ip_conntrack *ct = (struct ip_conntrack *)nfct; struct ip_conntrack_protocol *proto; + struct ip_conntrack_helper *helper; DEBUGP("destroy_conntrack(%p)\n", ct); IP_NF_ASSERT(atomic_read(&nfct->use) == 0); @@ -321,6 +316,10 @@ destroy_conntrack(struct nf_conntrack *nfct) ip_conntrack_event(IPCT_DESTROY, ct); set_bit(IPS_DYING_BIT, &ct->status); + helper = ct->helper; + if (helper && helper->destroy) + helper->destroy(ct); + /* To make sure we don't get any weird locking issues here: * destroy_conntrack() MUST NOT be called with a write lock * to ip_conntrack_lock!!! -HW */ @@ -367,16 +366,6 @@ static void death_by_timeout(unsigned long ul_conntrack) ip_conntrack_put(ct); } -static inline int -conntrack_tuple_cmp(const struct ip_conntrack_tuple_hash *i, - const struct ip_conntrack_tuple *tuple, - const struct ip_conntrack *ignored_conntrack) -{ - ASSERT_READ_LOCK(&ip_conntrack_lock); - return tuplehash_to_ctrack(i) != ignored_conntrack - && ip_ct_tuple_equal(tuple, &i->tuple); -} - struct ip_conntrack_tuple_hash * __ip_conntrack_find(const struct ip_conntrack_tuple *tuple, const struct ip_conntrack *ignored_conntrack) @@ -386,7 +375,8 @@ __ip_conntrack_find(const struct ip_conntrack_tuple *tuple, ASSERT_READ_LOCK(&ip_conntrack_lock); list_for_each_entry(h, &ip_conntrack_hash[hash], list) { - if (conntrack_tuple_cmp(h, tuple, ignored_conntrack)) { + if (tuplehash_to_ctrack(h) != ignored_conntrack && + ip_ct_tuple_equal(tuple, &h->tuple)) { CONNTRACK_STAT_INC(found); return h; } @@ -417,10 +407,10 @@ static void __ip_conntrack_hash_insert(struct ip_conntrack *ct, unsigned int repl_hash) { ct->id = ++ip_conntrack_next_id; - list_prepend(&ip_conntrack_hash[hash], - &ct->tuplehash[IP_CT_DIR_ORIGINAL].list); - list_prepend(&ip_conntrack_hash[repl_hash], - &ct->tuplehash[IP_CT_DIR_REPLY].list); + list_add(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list, + &ip_conntrack_hash[hash]); + list_add(&ct->tuplehash[IP_CT_DIR_REPLY].list, + &ip_conntrack_hash[repl_hash]); } void ip_conntrack_hash_insert(struct ip_conntrack *ct) @@ -440,6 +430,7 @@ int __ip_conntrack_confirm(struct sk_buff **pskb) { unsigned int hash, repl_hash; + struct ip_conntrack_tuple_hash *h; struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; @@ -470,43 +461,43 @@ __ip_conntrack_confirm(struct sk_buff **pskb) /* See if there's one in the list already, including reverse: NAT could have grabbed it without realizing, since we're not in the hash. If there is, we lost race. */ - if (!LIST_FIND(&ip_conntrack_hash[hash], - conntrack_tuple_cmp, - struct ip_conntrack_tuple_hash *, - &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, NULL) - && !LIST_FIND(&ip_conntrack_hash[repl_hash], - conntrack_tuple_cmp, - struct ip_conntrack_tuple_hash *, - &ct->tuplehash[IP_CT_DIR_REPLY].tuple, NULL)) { - /* Remove from unconfirmed list */ - list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list); + list_for_each_entry(h, &ip_conntrack_hash[hash], list) + if (ip_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, + &h->tuple)) + goto out; + list_for_each_entry(h, &ip_conntrack_hash[repl_hash], list) + if (ip_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple, + &h->tuple)) + goto out; - __ip_conntrack_hash_insert(ct, hash, repl_hash); - /* Timer relative to confirmation time, not original - setting time, otherwise we'd get timer wrap in - weird delay cases. */ - ct->timeout.expires += jiffies; - add_timer(&ct->timeout); - atomic_inc(&ct->ct_general.use); - set_bit(IPS_CONFIRMED_BIT, &ct->status); - CONNTRACK_STAT_INC(insert); - write_unlock_bh(&ip_conntrack_lock); - if (ct->helper) - ip_conntrack_event_cache(IPCT_HELPER, *pskb); + /* Remove from unconfirmed list */ + list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list); + + __ip_conntrack_hash_insert(ct, hash, repl_hash); + /* Timer relative to confirmation time, not original + setting time, otherwise we'd get timer wrap in + weird delay cases. */ + ct->timeout.expires += jiffies; + add_timer(&ct->timeout); + atomic_inc(&ct->ct_general.use); + set_bit(IPS_CONFIRMED_BIT, &ct->status); + CONNTRACK_STAT_INC(insert); + write_unlock_bh(&ip_conntrack_lock); + if (ct->helper) + ip_conntrack_event_cache(IPCT_HELPER, *pskb); #ifdef CONFIG_IP_NF_NAT_NEEDED - if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) || - test_bit(IPS_DST_NAT_DONE_BIT, &ct->status)) - ip_conntrack_event_cache(IPCT_NATINFO, *pskb); + if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) || + test_bit(IPS_DST_NAT_DONE_BIT, &ct->status)) + ip_conntrack_event_cache(IPCT_NATINFO, *pskb); #endif - ip_conntrack_event_cache(master_ct(ct) ? - IPCT_RELATED : IPCT_NEW, *pskb); + ip_conntrack_event_cache(master_ct(ct) ? + IPCT_RELATED : IPCT_NEW, *pskb); - return NF_ACCEPT; - } + return NF_ACCEPT; +out: CONNTRACK_STAT_INC(insert_failed); write_unlock_bh(&ip_conntrack_lock); - return NF_DROP; } @@ -527,23 +518,21 @@ ip_conntrack_tuple_taken(const struct ip_conntrack_tuple *tuple, /* There's a small race here where we may free a just-assured connection. Too bad: we're in trouble anyway. */ -static inline int unreplied(const struct ip_conntrack_tuple_hash *i) -{ - return !(test_bit(IPS_ASSURED_BIT, &tuplehash_to_ctrack(i)->status)); -} - static int early_drop(struct list_head *chain) { /* Traverse backwards: gives us oldest, which is roughly LRU */ struct ip_conntrack_tuple_hash *h; - struct ip_conntrack *ct = NULL; + struct ip_conntrack *ct = NULL, *tmp; int dropped = 0; read_lock_bh(&ip_conntrack_lock); - h = LIST_FIND_B(chain, unreplied, struct ip_conntrack_tuple_hash *); - if (h) { - ct = tuplehash_to_ctrack(h); - atomic_inc(&ct->ct_general.use); + list_for_each_entry_reverse(h, chain, list) { + tmp = tuplehash_to_ctrack(h); + if (!test_bit(IPS_ASSURED_BIT, &tmp->status)) { + ct = tmp; + atomic_inc(&ct->ct_general.use); + break; + } } read_unlock_bh(&ip_conntrack_lock); @@ -559,18 +548,16 @@ static int early_drop(struct list_head *chain) return dropped; } -static inline int helper_cmp(const struct ip_conntrack_helper *i, - const struct ip_conntrack_tuple *rtuple) -{ - return ip_ct_tuple_mask_cmp(rtuple, &i->tuple, &i->mask); -} - static struct ip_conntrack_helper * __ip_conntrack_helper_find( const struct ip_conntrack_tuple *tuple) { - return LIST_FIND(&helpers, helper_cmp, - struct ip_conntrack_helper *, - tuple); + struct ip_conntrack_helper *h; + + list_for_each_entry(h, &helpers, list) { + if (ip_ct_tuple_mask_cmp(tuple, &h->tuple, &h->mask)) + return h; + } + return NULL; } struct ip_conntrack_helper * @@ -640,11 +627,15 @@ struct ip_conntrack *ip_conntrack_alloc(struct ip_conntrack_tuple *orig, ip_conntrack_hash_rnd_initted = 1; } + /* We don't want any race condition at early drop stage */ + atomic_inc(&ip_conntrack_count); + if (ip_conntrack_max - && atomic_read(&ip_conntrack_count) >= ip_conntrack_max) { + && atomic_read(&ip_conntrack_count) > ip_conntrack_max) { unsigned int hash = hash_conntrack(orig); /* Try dropping from this hash chain. */ if (!early_drop(&ip_conntrack_hash[hash])) { + atomic_dec(&ip_conntrack_count); if (net_ratelimit()) printk(KERN_WARNING "ip_conntrack: table full, dropping" @@ -656,6 +647,7 @@ struct ip_conntrack *ip_conntrack_alloc(struct ip_conntrack_tuple *orig, conntrack = kmem_cache_alloc(ip_conntrack_cachep, GFP_ATOMIC); if (!conntrack) { DEBUGP("Can't allocate conntrack.\n"); + atomic_dec(&ip_conntrack_count); return ERR_PTR(-ENOMEM); } @@ -669,8 +661,6 @@ struct ip_conntrack *ip_conntrack_alloc(struct ip_conntrack_tuple *orig, conntrack->timeout.data = (unsigned long)conntrack; conntrack->timeout.function = death_by_timeout; - atomic_inc(&ip_conntrack_count); - return conntrack; } @@ -1062,7 +1052,7 @@ int ip_conntrack_helper_register(struct ip_conntrack_helper *me) { BUG_ON(me->timeout == 0); write_lock_bh(&ip_conntrack_lock); - list_prepend(&helpers, me); + list_add(&me->list, &helpers); write_unlock_bh(&ip_conntrack_lock); return 0; @@ -1081,24 +1071,24 @@ __ip_conntrack_helper_find_byname(const char *name) return NULL; } -static inline int unhelp(struct ip_conntrack_tuple_hash *i, - const struct ip_conntrack_helper *me) +static inline void unhelp(struct ip_conntrack_tuple_hash *i, + const struct ip_conntrack_helper *me) { if (tuplehash_to_ctrack(i)->helper == me) { ip_conntrack_event(IPCT_HELPER, tuplehash_to_ctrack(i)); tuplehash_to_ctrack(i)->helper = NULL; } - return 0; } void ip_conntrack_helper_unregister(struct ip_conntrack_helper *me) { unsigned int i; + struct ip_conntrack_tuple_hash *h; struct ip_conntrack_expect *exp, *tmp; /* Need write lock here, to delete helper. */ write_lock_bh(&ip_conntrack_lock); - LIST_DELETE(&helpers, me); + list_del(&me->list); /* Get rid of expectations */ list_for_each_entry_safe(exp, tmp, &ip_conntrack_expect_list, list) { @@ -1108,10 +1098,12 @@ void ip_conntrack_helper_unregister(struct ip_conntrack_helper *me) } } /* Get rid of expecteds, set helpers to NULL. */ - LIST_FIND_W(&unconfirmed, unhelp, struct ip_conntrack_tuple_hash*, me); - for (i = 0; i < ip_conntrack_htable_size; i++) - LIST_FIND_W(&ip_conntrack_hash[i], unhelp, - struct ip_conntrack_tuple_hash *, me); + list_for_each_entry(h, &unconfirmed, list) + unhelp(h, me); + for (i = 0; i < ip_conntrack_htable_size; i++) { + list_for_each_entry(h, &ip_conntrack_hash[i], list) + unhelp(h, me); + } write_unlock_bh(&ip_conntrack_lock); /* Someone could be still looking at the helper in a bh. */ @@ -1237,46 +1229,43 @@ static void ip_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb) nf_conntrack_get(nskb->nfct); } -static inline int -do_iter(const struct ip_conntrack_tuple_hash *i, - int (*iter)(struct ip_conntrack *i, void *data), - void *data) -{ - return iter(tuplehash_to_ctrack(i), data); -} - /* Bring out ya dead! */ -static struct ip_conntrack_tuple_hash * +static struct ip_conntrack * get_next_corpse(int (*iter)(struct ip_conntrack *i, void *data), void *data, unsigned int *bucket) { - struct ip_conntrack_tuple_hash *h = NULL; + struct ip_conntrack_tuple_hash *h; + struct ip_conntrack *ct; write_lock_bh(&ip_conntrack_lock); for (; *bucket < ip_conntrack_htable_size; (*bucket)++) { - h = LIST_FIND_W(&ip_conntrack_hash[*bucket], do_iter, - struct ip_conntrack_tuple_hash *, iter, data); - if (h) - break; + list_for_each_entry(h, &ip_conntrack_hash[*bucket], list) { + ct = tuplehash_to_ctrack(h); + if (iter(ct, data)) + goto found; + } + } + list_for_each_entry(h, &unconfirmed, list) { + ct = tuplehash_to_ctrack(h); + if (iter(ct, data)) + goto found; } - if (!h) - h = LIST_FIND_W(&unconfirmed, do_iter, - struct ip_conntrack_tuple_hash *, iter, data); - if (h) - atomic_inc(&tuplehash_to_ctrack(h)->ct_general.use); write_unlock_bh(&ip_conntrack_lock); + return NULL; - return h; +found: + atomic_inc(&ct->ct_general.use); + write_unlock_bh(&ip_conntrack_lock); + return ct; } void ip_ct_iterate_cleanup(int (*iter)(struct ip_conntrack *i, void *), void *data) { - struct ip_conntrack_tuple_hash *h; + struct ip_conntrack *ct; unsigned int bucket = 0; - while ((h = get_next_corpse(iter, data, &bucket)) != NULL) { - struct ip_conntrack *ct = tuplehash_to_ctrack(h); + while ((ct = get_next_corpse(iter, data, &bucket)) != NULL) { /* Time to push up daises... */ if (del_timer(&ct->timeout)) death_by_timeout((unsigned long)ct); diff --git a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c index b020a33..fb0aee6 100644 --- a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c +++ b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c @@ -20,11 +20,11 @@ * - We can only support one single call within each session * * TODO: - * - testing of incoming PPTP calls + * - testing of incoming PPTP calls * - * Changes: + * Changes: * 2002-02-05 - Version 1.3 - * - Call ip_conntrack_unexpect_related() from + * - Call ip_conntrack_unexpect_related() from * pptp_destroy_siblings() to destroy expectations in case * CALL_DISCONNECT_NOTIFY or tcp fin packet was seen * (Philip Craig <philipc@snapgear.com>) @@ -80,7 +80,7 @@ int struct PptpControlHeader *ctlh, union pptp_ctrl_union *pptpReq); -int +void (*ip_nat_pptp_hook_exp_gre)(struct ip_conntrack_expect *expect_orig, struct ip_conntrack_expect *expect_reply); @@ -141,7 +141,7 @@ static void pptp_expectfn(struct ip_conntrack *ct, invert_tuplepr(&inv_t, &exp->tuple); DEBUGP("trying to unexpect other dir: "); DUMP_TUPLE(&inv_t); - + exp_other = ip_conntrack_expect_find(&inv_t); if (exp_other) { /* delete other expectation. */ @@ -194,15 +194,16 @@ static void pptp_destroy_siblings(struct ip_conntrack *ct) { struct ip_conntrack_tuple t; - /* Since ct->sibling_list has literally rusted away in 2.6.11, + ip_ct_gre_keymap_destroy(ct); + /* Since ct->sibling_list has literally rusted away in 2.6.11, * we now need another way to find out about our sibling * contrack and expects... -HW */ /* try original (pns->pac) tuple */ memcpy(&t, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, sizeof(t)); t.dst.protonum = IPPROTO_GRE; - t.src.u.gre.key = htons(ct->help.ct_pptp_info.pns_call_id); - t.dst.u.gre.key = htons(ct->help.ct_pptp_info.pac_call_id); + t.src.u.gre.key = ct->help.ct_pptp_info.pns_call_id; + t.dst.u.gre.key = ct->help.ct_pptp_info.pac_call_id; if (!destroy_sibling_or_exp(&t)) DEBUGP("failed to timeout original pns->pac ct/exp\n"); @@ -210,8 +211,8 @@ static void pptp_destroy_siblings(struct ip_conntrack *ct) /* try reply (pac->pns) tuple */ memcpy(&t, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, sizeof(t)); t.dst.protonum = IPPROTO_GRE; - t.src.u.gre.key = htons(ct->help.ct_pptp_info.pac_call_id); - t.dst.u.gre.key = htons(ct->help.ct_pptp_info.pns_call_id); + t.src.u.gre.key = ct->help.ct_pptp_info.pac_call_id; + t.dst.u.gre.key = ct->help.ct_pptp_info.pns_call_id; if (!destroy_sibling_or_exp(&t)) DEBUGP("failed to timeout reply pac->pns ct/exp\n"); @@ -219,94 +220,63 @@ static void pptp_destroy_siblings(struct ip_conntrack *ct) /* expect GRE connections (PNS->PAC and PAC->PNS direction) */ static inline int -exp_gre(struct ip_conntrack *master, - u_int32_t seq, +exp_gre(struct ip_conntrack *ct, __be16 callid, __be16 peer_callid) { - struct ip_conntrack_tuple inv_tuple; - struct ip_conntrack_tuple exp_tuples[] = { - /* tuple in original direction, PNS->PAC */ - { .src = { .ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip, - .u = { .gre = { .key = peer_callid } } - }, - .dst = { .ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip, - .u = { .gre = { .key = callid } }, - .protonum = IPPROTO_GRE - }, - }, - /* tuple in reply direction, PAC->PNS */ - { .src = { .ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip, - .u = { .gre = { .key = callid } } - }, - .dst = { .ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip, - .u = { .gre = { .key = peer_callid } }, - .protonum = IPPROTO_GRE - }, - } - }; struct ip_conntrack_expect *exp_orig, *exp_reply; int ret = 1; - exp_orig = ip_conntrack_expect_alloc(master); + exp_orig = ip_conntrack_expect_alloc(ct); if (exp_orig == NULL) goto out; - exp_reply = ip_conntrack_expect_alloc(master); + exp_reply = ip_conntrack_expect_alloc(ct); if (exp_reply == NULL) goto out_put_orig; - memcpy(&exp_orig->tuple, &exp_tuples[0], sizeof(exp_orig->tuple)); + /* original direction, PNS->PAC */ + exp_orig->tuple.src.ip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip; + exp_orig->tuple.src.u.gre.key = peer_callid; + exp_orig->tuple.dst.ip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip; + exp_orig->tuple.dst.u.gre.key = callid; + exp_orig->tuple.dst.protonum = IPPROTO_GRE; exp_orig->mask.src.ip = 0xffffffff; exp_orig->mask.src.u.all = 0; - exp_orig->mask.dst.u.all = 0; exp_orig->mask.dst.u.gre.key = htons(0xffff); exp_orig->mask.dst.ip = 0xffffffff; exp_orig->mask.dst.protonum = 0xff; - - exp_orig->master = master; + + exp_orig->master = ct; exp_orig->expectfn = pptp_expectfn; exp_orig->flags = 0; /* both expectations are identical apart from tuple */ memcpy(exp_reply, exp_orig, sizeof(*exp_reply)); - memcpy(&exp_reply->tuple, &exp_tuples[1], sizeof(exp_reply->tuple)); - if (ip_nat_pptp_hook_exp_gre) - ret = ip_nat_pptp_hook_exp_gre(exp_orig, exp_reply); - else { - - DEBUGP("calling expect_related PNS->PAC"); - DUMP_TUPLE(&exp_orig->tuple); - - if (ip_conntrack_expect_related(exp_orig) != 0) { - DEBUGP("cannot expect_related()\n"); - goto out_put_both; - } + /* reply direction, PAC->PNS */ + exp_reply->tuple.src.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip; + exp_reply->tuple.src.u.gre.key = callid; + exp_reply->tuple.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip; + exp_reply->tuple.dst.u.gre.key = peer_callid; + exp_reply->tuple.dst.protonum = IPPROTO_GRE; - DEBUGP("calling expect_related PAC->PNS"); - DUMP_TUPLE(&exp_reply->tuple); - - if (ip_conntrack_expect_related(exp_reply) != 0) { - DEBUGP("cannot expect_related()\n"); - goto out_unexpect_orig; - } - - /* Add GRE keymap entries */ - if (ip_ct_gre_keymap_add(master, &exp_reply->tuple, 0) != 0) { - DEBUGP("cannot keymap_add() exp\n"); - goto out_unexpect_both; - } - - invert_tuplepr(&inv_tuple, &exp_reply->tuple); - if (ip_ct_gre_keymap_add(master, &inv_tuple, 1) != 0) { - ip_ct_gre_keymap_destroy(master); - DEBUGP("cannot keymap_add() exp_inv\n"); - goto out_unexpect_both; - } - ret = 0; + if (ip_nat_pptp_hook_exp_gre) + ip_nat_pptp_hook_exp_gre(exp_orig, exp_reply); + if (ip_conntrack_expect_related(exp_orig) != 0) + goto out_put_both; + if (ip_conntrack_expect_related(exp_reply) != 0) + goto out_unexpect_orig; + + /* Add GRE keymap entries */ + if (ip_ct_gre_keymap_add(ct, &exp_orig->tuple, 0) != 0) + goto out_unexpect_both; + if (ip_ct_gre_keymap_add(ct, &exp_reply->tuple, 1) != 0) { + ip_ct_gre_keymap_destroy(ct); + goto out_unexpect_both; } + ret = 0; out_put_both: ip_conntrack_expect_put(exp_reply); @@ -322,73 +292,36 @@ out_unexpect_orig: goto out_put_both; } -static inline int +static inline int pptp_inbound_pkt(struct sk_buff **pskb, - struct tcphdr *tcph, - unsigned int nexthdr_off, - unsigned int datalen, + struct PptpControlHeader *ctlh, + union pptp_ctrl_union *pptpReq, + unsigned int reqlen, struct ip_conntrack *ct, enum ip_conntrack_info ctinfo) { - struct PptpControlHeader _ctlh, *ctlh; - unsigned int reqlen; - union pptp_ctrl_union _pptpReq, *pptpReq; struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info; u_int16_t msg; - __be16 *cid, *pcid; - u_int32_t seq; - - ctlh = skb_header_pointer(*pskb, nexthdr_off, sizeof(_ctlh), &_ctlh); - if (!ctlh) { - DEBUGP("error during skb_header_pointer\n"); - return NF_ACCEPT; - } - nexthdr_off += sizeof(_ctlh); - datalen -= sizeof(_ctlh); - - reqlen = datalen; - if (reqlen > sizeof(*pptpReq)) - reqlen = sizeof(*pptpReq); - pptpReq = skb_header_pointer(*pskb, nexthdr_off, reqlen, &_pptpReq); - if (!pptpReq) { - DEBUGP("error during skb_header_pointer\n"); - return NF_ACCEPT; - } + __be16 cid = 0, pcid = 0; msg = ntohs(ctlh->messageType); DEBUGP("inbound control message %s\n", pptp_msg_name[msg]); switch (msg) { case PPTP_START_SESSION_REPLY: - if (reqlen < sizeof(_pptpReq.srep)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* server confirms new control session */ - if (info->sstate < PPTP_SESSION_REQUESTED) { - DEBUGP("%s without START_SESS_REQUEST\n", - pptp_msg_name[msg]); - break; - } + if (info->sstate < PPTP_SESSION_REQUESTED) + goto invalid; if (pptpReq->srep.resultCode == PPTP_START_OK) info->sstate = PPTP_SESSION_CONFIRMED; - else + else info->sstate = PPTP_SESSION_ERROR; break; case PPTP_STOP_SESSION_REPLY: - if (reqlen < sizeof(_pptpReq.strep)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* server confirms end of control session */ - if (info->sstate > PPTP_SESSION_STOPREQ) { - DEBUGP("%s without STOP_SESS_REQUEST\n", - pptp_msg_name[msg]); - break; - } + if (info->sstate > PPTP_SESSION_STOPREQ) + goto invalid; if (pptpReq->strep.resultCode == PPTP_STOP_OK) info->sstate = PPTP_SESSION_NONE; else @@ -396,116 +329,64 @@ pptp_inbound_pkt(struct sk_buff **pskb, break; case PPTP_OUT_CALL_REPLY: - if (reqlen < sizeof(_pptpReq.ocack)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* server accepted call, we now expect GRE frames */ - if (info->sstate != PPTP_SESSION_CONFIRMED) { - DEBUGP("%s but no session\n", pptp_msg_name[msg]); - break; - } + if (info->sstate != PPTP_SESSION_CONFIRMED) + goto invalid; if (info->cstate != PPTP_CALL_OUT_REQ && - info->cstate != PPTP_CALL_OUT_CONF) { - DEBUGP("%s without OUTCALL_REQ\n", pptp_msg_name[msg]); - break; - } - if (pptpReq->ocack.resultCode != PPTP_OUTCALL_CONNECT) { + info->cstate != PPTP_CALL_OUT_CONF) + goto invalid; + + cid = pptpReq->ocack.callID; + pcid = pptpReq->ocack.peersCallID; + if (info->pns_call_id != pcid) + goto invalid; + DEBUGP("%s, CID=%X, PCID=%X\n", pptp_msg_name[msg], + ntohs(cid), ntohs(pcid)); + + if (pptpReq->ocack.resultCode == PPTP_OUTCALL_CONNECT) { + info->cstate = PPTP_CALL_OUT_CONF; + info->pac_call_id = cid; + exp_gre(ct, cid, pcid); + } else info->cstate = PPTP_CALL_NONE; - break; - } - - cid = &pptpReq->ocack.callID; - pcid = &pptpReq->ocack.peersCallID; - - info->pac_call_id = ntohs(*cid); - - if (htons(info->pns_call_id) != *pcid) { - DEBUGP("%s for unknown callid %u\n", - pptp_msg_name[msg], ntohs(*pcid)); - break; - } - - DEBUGP("%s, CID=%X, PCID=%X\n", pptp_msg_name[msg], - ntohs(*cid), ntohs(*pcid)); - - info->cstate = PPTP_CALL_OUT_CONF; - - seq = ntohl(tcph->seq) + sizeof(struct pptp_pkt_hdr) - + sizeof(struct PptpControlHeader) - + ((void *)pcid - (void *)pptpReq); - - if (exp_gre(ct, seq, *cid, *pcid) != 0) - printk("ip_conntrack_pptp: error during exp_gre\n"); break; case PPTP_IN_CALL_REQUEST: - if (reqlen < sizeof(_pptpReq.icack)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* server tells us about incoming call request */ - if (info->sstate != PPTP_SESSION_CONFIRMED) { - DEBUGP("%s but no session\n", pptp_msg_name[msg]); - break; - } - pcid = &pptpReq->icack.peersCallID; - DEBUGP("%s, PCID=%X\n", pptp_msg_name[msg], ntohs(*pcid)); + if (info->sstate != PPTP_SESSION_CONFIRMED) + goto invalid; + + cid = pptpReq->icreq.callID; + DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(cid)); info->cstate = PPTP_CALL_IN_REQ; - info->pac_call_id = ntohs(*pcid); + info->pac_call_id = cid; break; case PPTP_IN_CALL_CONNECT: - if (reqlen < sizeof(_pptpReq.iccon)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* server tells us about incoming call established */ - if (info->sstate != PPTP_SESSION_CONFIRMED) { - DEBUGP("%s but no session\n", pptp_msg_name[msg]); - break; - } - if (info->cstate != PPTP_CALL_IN_REP - && info->cstate != PPTP_CALL_IN_CONF) { - DEBUGP("%s but never sent IN_CALL_REPLY\n", - pptp_msg_name[msg]); - break; - } + if (info->sstate != PPTP_SESSION_CONFIRMED) + goto invalid; + if (info->cstate != PPTP_CALL_IN_REP && + info->cstate != PPTP_CALL_IN_CONF) + goto invalid; - pcid = &pptpReq->iccon.peersCallID; - cid = &info->pac_call_id; + pcid = pptpReq->iccon.peersCallID; + cid = info->pac_call_id; - if (info->pns_call_id != ntohs(*pcid)) { - DEBUGP("%s for unknown CallID %u\n", - pptp_msg_name[msg], ntohs(*pcid)); - break; - } + if (info->pns_call_id != pcid) + goto invalid; - DEBUGP("%s, PCID=%X\n", pptp_msg_name[msg], ntohs(*pcid)); + DEBUGP("%s, PCID=%X\n", pptp_msg_name[msg], ntohs(pcid)); info->cstate = PPTP_CALL_IN_CONF; /* we expect a GRE connection from PAC to PNS */ - seq = ntohl(tcph->seq) + sizeof(struct pptp_pkt_hdr) - + sizeof(struct PptpControlHeader) - + ((void *)pcid - (void *)pptpReq); - - if (exp_gre(ct, seq, *cid, *pcid) != 0) - printk("ip_conntrack_pptp: error during exp_gre\n"); - + exp_gre(ct, cid, pcid); break; case PPTP_CALL_DISCONNECT_NOTIFY: - if (reqlen < sizeof(_pptpReq.disc)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* server confirms disconnect */ - cid = &pptpReq->disc.callID; - DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(*cid)); + cid = pptpReq->disc.callID; + DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(cid)); info->cstate = PPTP_CALL_NONE; /* untrack this call id, unexpect GRE packets */ @@ -513,54 +394,39 @@ pptp_inbound_pkt(struct sk_buff **pskb, break; case PPTP_WAN_ERROR_NOTIFY: - break; - case PPTP_ECHO_REQUEST: case PPTP_ECHO_REPLY: /* I don't have to explain these ;) */ break; default: - DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX) - ? pptp_msg_name[msg]:pptp_msg_name[0], msg); - break; + goto invalid; } - if (ip_nat_pptp_hook_inbound) return ip_nat_pptp_hook_inbound(pskb, ct, ctinfo, ctlh, pptpReq); - return NF_ACCEPT; +invalid: + DEBUGP("invalid %s: type=%d cid=%u pcid=%u " + "cstate=%d sstate=%d pns_cid=%u pac_cid=%u\n", + msg <= PPTP_MSG_MAX ? pptp_msg_name[msg] : pptp_msg_name[0], + msg, ntohs(cid), ntohs(pcid), info->cstate, info->sstate, + ntohs(info->pns_call_id), ntohs(info->pac_call_id)); + return NF_ACCEPT; } static inline int pptp_outbound_pkt(struct sk_buff **pskb, - struct tcphdr *tcph, - unsigned int nexthdr_off, - unsigned int datalen, + struct PptpControlHeader *ctlh, + union pptp_ctrl_union *pptpReq, + unsigned int reqlen, struct ip_conntrack *ct, enum ip_conntrack_info ctinfo) { - struct PptpControlHeader _ctlh, *ctlh; - unsigned int reqlen; - union pptp_ctrl_union _pptpReq, *pptpReq; struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info; u_int16_t msg; - __be16 *cid, *pcid; - - ctlh = skb_header_pointer(*pskb, nexthdr_off, sizeof(_ctlh), &_ctlh); - if (!ctlh) - return NF_ACCEPT; - nexthdr_off += sizeof(_ctlh); - datalen -= sizeof(_ctlh); - - reqlen = datalen; - if (reqlen > sizeof(*pptpReq)) - reqlen = sizeof(*pptpReq); - pptpReq = skb_header_pointer(*pskb, nexthdr_off, reqlen, &_pptpReq); - if (!pptpReq) - return NF_ACCEPT; + __be16 cid = 0, pcid = 0; msg = ntohs(ctlh->messageType); DEBUGP("outbound control message %s\n", pptp_msg_name[msg]); @@ -568,10 +434,8 @@ pptp_outbound_pkt(struct sk_buff **pskb, switch (msg) { case PPTP_START_SESSION_REQUEST: /* client requests for new control session */ - if (info->sstate != PPTP_SESSION_NONE) { - DEBUGP("%s but we already have one", - pptp_msg_name[msg]); - } + if (info->sstate != PPTP_SESSION_NONE) + goto invalid; info->sstate = PPTP_SESSION_REQUESTED; break; case PPTP_STOP_SESSION_REQUEST: @@ -580,123 +444,115 @@ pptp_outbound_pkt(struct sk_buff **pskb, break; case PPTP_OUT_CALL_REQUEST: - if (reqlen < sizeof(_pptpReq.ocreq)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - /* FIXME: break; */ - } - /* client initiating connection to server */ - if (info->sstate != PPTP_SESSION_CONFIRMED) { - DEBUGP("%s but no session\n", - pptp_msg_name[msg]); - break; - } + if (info->sstate != PPTP_SESSION_CONFIRMED) + goto invalid; info->cstate = PPTP_CALL_OUT_REQ; /* track PNS call id */ - cid = &pptpReq->ocreq.callID; - DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(*cid)); - info->pns_call_id = ntohs(*cid); + cid = pptpReq->ocreq.callID; + DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(cid)); + info->pns_call_id = cid; break; case PPTP_IN_CALL_REPLY: - if (reqlen < sizeof(_pptpReq.icack)) { - DEBUGP("%s: short packet\n", pptp_msg_name[msg]); - break; - } - /* client answers incoming call */ - if (info->cstate != PPTP_CALL_IN_REQ - && info->cstate != PPTP_CALL_IN_REP) { - DEBUGP("%s without incall_req\n", - pptp_msg_name[msg]); - break; - } - if (pptpReq->icack.resultCode != PPTP_INCALL_ACCEPT) { + if (info->cstate != PPTP_CALL_IN_REQ && + info->cstate != PPTP_CALL_IN_REP) + goto invalid; + + cid = pptpReq->icack.callID; + pcid = pptpReq->icack.peersCallID; + if (info->pac_call_id != pcid) + goto invalid; + DEBUGP("%s, CID=%X PCID=%X\n", pptp_msg_name[msg], + ntohs(cid), ntohs(pcid)); + + if (pptpReq->icack.resultCode == PPTP_INCALL_ACCEPT) { + /* part two of the three-way handshake */ + info->cstate = PPTP_CALL_IN_REP; + info->pns_call_id = cid; + } else info->cstate = PPTP_CALL_NONE; - break; - } - pcid = &pptpReq->icack.peersCallID; - if (info->pac_call_id != ntohs(*pcid)) { - DEBUGP("%s for unknown call %u\n", - pptp_msg_name[msg], ntohs(*pcid)); - break; - } - DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(*pcid)); - /* part two of the three-way handshake */ - info->cstate = PPTP_CALL_IN_REP; - info->pns_call_id = ntohs(pptpReq->icack.callID); break; case PPTP_CALL_CLEAR_REQUEST: /* client requests hangup of call */ - if (info->sstate != PPTP_SESSION_CONFIRMED) { - DEBUGP("CLEAR_CALL but no session\n"); - break; - } + if (info->sstate != PPTP_SESSION_CONFIRMED) + goto invalid; /* FUTURE: iterate over all calls and check if * call ID is valid. We don't do this without newnat, * because we only know about last call */ info->cstate = PPTP_CALL_CLEAR_REQ; break; case PPTP_SET_LINK_INFO: - break; case PPTP_ECHO_REQUEST: case PPTP_ECHO_REPLY: /* I don't have to explain these ;) */ break; default: - DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)? - pptp_msg_name[msg]:pptp_msg_name[0], msg); - /* unknown: no need to create GRE masq table entry */ - break; + goto invalid; } - + if (ip_nat_pptp_hook_outbound) return ip_nat_pptp_hook_outbound(pskb, ct, ctinfo, ctlh, pptpReq); + return NF_ACCEPT; +invalid: + DEBUGP("invalid %s: type=%d cid=%u pcid=%u " + "cstate=%d sstate=%d pns_cid=%u pac_cid=%u\n", + msg <= PPTP_MSG_MAX ? pptp_msg_name[msg] : pptp_msg_name[0], + msg, ntohs(cid), ntohs(pcid), info->cstate, info->sstate, + ntohs(info->pns_call_id), ntohs(info->pac_call_id)); return NF_ACCEPT; } +static const unsigned int pptp_msg_size[] = { + [PPTP_START_SESSION_REQUEST] = sizeof(struct PptpStartSessionRequest), + [PPTP_START_SESSION_REPLY] = sizeof(struct PptpStartSessionReply), + [PPTP_STOP_SESSION_REQUEST] = sizeof(struct PptpStopSessionRequest), + [PPTP_STOP_SESSION_REPLY] = sizeof(struct PptpStopSessionReply), + [PPTP_OUT_CALL_REQUEST] = sizeof(struct PptpOutCallRequest), + [PPTP_OUT_CALL_REPLY] = sizeof(struct PptpOutCallReply), + [PPTP_IN_CALL_REQUEST] = sizeof(struct PptpInCallRequest), + [PPTP_IN_CALL_REPLY] = sizeof(struct PptpInCallReply), + [PPTP_IN_CALL_CONNECT] = sizeof(struct PptpInCallConnected), + [PPTP_CALL_CLEAR_REQUEST] = sizeof(struct PptpClearCallRequest), + [PPTP_CALL_DISCONNECT_NOTIFY] = sizeof(struct PptpCallDisconnectNotify), + [PPTP_WAN_ERROR_NOTIFY] = sizeof(struct PptpWanErrorNotify), + [PPTP_SET_LINK_INFO] = sizeof(struct PptpSetLinkInfo), +}; /* track caller id inside control connection, call expect_related */ -static int +static int conntrack_pptp_help(struct sk_buff **pskb, struct ip_conntrack *ct, enum ip_conntrack_info ctinfo) { - struct pptp_pkt_hdr _pptph, *pptph; - struct tcphdr _tcph, *tcph; - u_int32_t tcplen = (*pskb)->len - (*pskb)->nh.iph->ihl * 4; - u_int32_t datalen; int dir = CTINFO2DIR(ctinfo); struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info; - unsigned int nexthdr_off; - + struct tcphdr _tcph, *tcph; + struct pptp_pkt_hdr _pptph, *pptph; + struct PptpControlHeader _ctlh, *ctlh; + union pptp_ctrl_union _pptpReq, *pptpReq; + unsigned int tcplen = (*pskb)->len - (*pskb)->nh.iph->ihl * 4; + unsigned int datalen, reqlen, nexthdr_off; int oldsstate, oldcstate; int ret; + u_int16_t msg; /* don't do any tracking before tcp handshake complete */ - if (ctinfo != IP_CT_ESTABLISHED + if (ctinfo != IP_CT_ESTABLISHED && ctinfo != IP_CT_ESTABLISHED+IP_CT_IS_REPLY) { DEBUGP("ctinfo = %u, skipping\n", ctinfo); return NF_ACCEPT; } - + nexthdr_off = (*pskb)->nh.iph->ihl*4; tcph = skb_header_pointer(*pskb, nexthdr_off, sizeof(_tcph), &_tcph); BUG_ON(!tcph); nexthdr_off += tcph->doff * 4; datalen = tcplen - tcph->doff * 4; - if (tcph->fin || tcph->rst) { - DEBUGP("RST/FIN received, timeouting GRE\n"); - /* can't do this after real newnat */ - info->cstate = PPTP_CALL_NONE; - - /* untrack this call id, unexpect GRE packets */ - pptp_destroy_siblings(ct); - } - pptph = skb_header_pointer(*pskb, nexthdr_off, sizeof(_pptph), &_pptph); if (!pptph) { DEBUGP("no full PPTP header, can't track\n"); @@ -712,6 +568,23 @@ conntrack_pptp_help(struct sk_buff **pskb, return NF_ACCEPT; } + ctlh = skb_header_pointer(*pskb, nexthdr_off, sizeof(_ctlh), &_ctlh); + if (!ctlh) + return NF_ACCEPT; + nexthdr_off += sizeof(_ctlh); + datalen -= sizeof(_ctlh); + + reqlen = datalen; + msg = ntohs(ctlh->messageType); + if (msg > 0 && msg <= PPTP_MSG_MAX && reqlen < pptp_msg_size[msg]) + return NF_ACCEPT; + if (reqlen > sizeof(*pptpReq)) + reqlen = sizeof(*pptpReq); + + pptpReq = skb_header_pointer(*pskb, nexthdr_off, reqlen, &_pptpReq); + if (!pptpReq) + return NF_ACCEPT; + oldsstate = info->sstate; oldcstate = info->cstate; @@ -721,11 +594,11 @@ conntrack_pptp_help(struct sk_buff **pskb, * established from PNS->PAC. However, RFC makes no guarantee */ if (dir == IP_CT_DIR_ORIGINAL) /* client -> server (PNS -> PAC) */ - ret = pptp_outbound_pkt(pskb, tcph, nexthdr_off, datalen, ct, + ret = pptp_outbound_pkt(pskb, ctlh, pptpReq, reqlen, ct, ctinfo); else /* server -> client (PAC -> PNS) */ - ret = pptp_inbound_pkt(pskb, tcph, nexthdr_off, datalen, ct, + ret = pptp_inbound_pkt(pskb, ctlh, pptpReq, reqlen, ct, ctinfo); DEBUGP("sstate: %d->%d, cstate: %d->%d\n", oldsstate, info->sstate, oldcstate, info->cstate); @@ -735,30 +608,31 @@ conntrack_pptp_help(struct sk_buff **pskb, } /* control protocol helper */ -static struct ip_conntrack_helper pptp = { +static struct ip_conntrack_helper pptp = { .list = { NULL, NULL }, - .name = "pptp", + .name = "pptp", .me = THIS_MODULE, .max_expected = 2, .timeout = 5 * 60, - .tuple = { .src = { .ip = 0, - .u = { .tcp = { .port = - __constant_htons(PPTP_CONTROL_PORT) } } - }, - .dst = { .ip = 0, + .tuple = { .src = { .ip = 0, + .u = { .tcp = { .port = + __constant_htons(PPTP_CONTROL_PORT) } } + }, + .dst = { .ip = 0, .u = { .all = 0 }, .protonum = IPPROTO_TCP - } + } }, - .mask = { .src = { .ip = 0, - .u = { .tcp = { .port = __constant_htons(0xffff) } } - }, - .dst = { .ip = 0, + .mask = { .src = { .ip = 0, + .u = { .tcp = { .port = __constant_htons(0xffff) } } + }, + .dst = { .ip = 0, .u = { .all = 0 }, - .protonum = 0xff - } + .protonum = 0xff + } }, - .help = conntrack_pptp_help + .help = conntrack_pptp_help, + .destroy = pptp_destroy_siblings, }; extern void ip_ct_proto_gre_fini(void); @@ -768,7 +642,7 @@ extern int __init ip_ct_proto_gre_init(void); static int __init ip_conntrack_helper_pptp_init(void) { int retcode; - + retcode = ip_ct_proto_gre_init(); if (retcode < 0) return retcode; diff --git a/net/ipv4/netfilter/ip_conntrack_netbios_ns.c b/net/ipv4/netfilter/ip_conntrack_netbios_ns.c index a566a81..3d0b438 100644 --- a/net/ipv4/netfilter/ip_conntrack_netbios_ns.c +++ b/net/ipv4/netfilter/ip_conntrack_netbios_ns.c @@ -21,6 +21,7 @@ #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/inetdevice.h> +#include <linux/if_addr.h> #include <linux/in.h> #include <linux/ip.h> #include <net/route.h> diff --git a/net/ipv4/netfilter/ip_conntrack_netlink.c b/net/ipv4/netfilter/ip_conntrack_netlink.c index 0d4cc92..52eddea 100644 --- a/net/ipv4/netfilter/ip_conntrack_netlink.c +++ b/net/ipv4/netfilter/ip_conntrack_netlink.c @@ -329,11 +329,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, /* dump everything */ events = ~0UL; group = NFNLGRP_CONNTRACK_NEW; - } else if (events & (IPCT_STATUS | - IPCT_PROTOINFO | - IPCT_HELPER | - IPCT_HELPINFO | - IPCT_NATINFO)) { + } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { type = IPCTNL_MSG_CT_NEW; group = NFNLGRP_CONNTRACK_UPDATE; } else @@ -385,6 +381,10 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) goto nfattr_failure; + if (events & IPCT_MARK + && ctnetlink_dump_mark(skb, ct) < 0) + goto nfattr_failure; + nlh->nlmsg_len = skb->tail - b; nfnetlink_send(skb, 0, group, 0); return NOTIFY_DONE; @@ -436,6 +436,11 @@ restart: cb->args[1] = (unsigned long)ct; goto out; } +#ifdef CONFIG_NF_CT_ACCT + if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == + IPCTNL_MSG_CT_GET_CTRZERO) + memset(&ct->counters, 0, sizeof(ct->counters)); +#endif } if (cb->args[1]) { cb->args[1] = 0; @@ -451,46 +456,6 @@ out: return skb->len; } -#ifdef CONFIG_IP_NF_CT_ACCT -static int -ctnetlink_dump_table_w(struct sk_buff *skb, struct netlink_callback *cb) -{ - struct ip_conntrack *ct = NULL; - struct ip_conntrack_tuple_hash *h; - struct list_head *i; - u_int32_t *id = (u_int32_t *) &cb->args[1]; - - DEBUGP("entered %s, last bucket=%u id=%u\n", __FUNCTION__, - cb->args[0], *id); - - write_lock_bh(&ip_conntrack_lock); - for (; cb->args[0] < ip_conntrack_htable_size; cb->args[0]++, *id = 0) { - list_for_each_prev(i, &ip_conntrack_hash[cb->args[0]]) { - h = (struct ip_conntrack_tuple_hash *) i; - if (DIRECTION(h) != IP_CT_DIR_ORIGINAL) - continue; - ct = tuplehash_to_ctrack(h); - if (ct->id <= *id) - continue; - if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, - cb->nlh->nlmsg_seq, - IPCTNL_MSG_CT_NEW, - 1, ct) < 0) - goto out; - *id = ct->id; - - memset(&ct->counters, 0, sizeof(ct->counters)); - } - } -out: - write_unlock_bh(&ip_conntrack_lock); - - DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id); - - return skb->len; -} -#endif - static const size_t cta_min_ip[CTA_IP_MAX] = { [CTA_IP_V4_SRC-1] = sizeof(u_int32_t), [CTA_IP_V4_DST-1] = sizeof(u_int32_t), @@ -775,22 +740,14 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, if (msg->nfgen_family != AF_INET) return -EAFNOSUPPORT; - if (NFNL_MSG_TYPE(nlh->nlmsg_type) == - IPCTNL_MSG_CT_GET_CTRZERO) { -#ifdef CONFIG_IP_NF_CT_ACCT - if ((*errp = netlink_dump_start(ctnl, skb, nlh, - ctnetlink_dump_table_w, - ctnetlink_done)) != 0) - return -EINVAL; -#else +#ifndef CONFIG_IP_NF_CT_ACCT + if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO) return -ENOTSUPP; #endif - } else { - if ((*errp = netlink_dump_start(ctnl, skb, nlh, - ctnetlink_dump_table, - ctnetlink_done)) != 0) + if ((*errp = netlink_dump_start(ctnl, skb, nlh, + ctnetlink_dump_table, + ctnetlink_done)) != 0) return -EINVAL; - } rlen = NLMSG_ALIGN(nlh->nlmsg_len); if (rlen > skb->len) @@ -1253,6 +1210,9 @@ static int ctnetlink_expect_event(struct notifier_block *this, } else return NOTIFY_DONE; + if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) + return NOTIFY_DONE; + skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); if (!skb) return NOTIFY_DONE; diff --git a/net/ipv4/netfilter/ip_conntrack_proto_generic.c b/net/ipv4/netfilter/ip_conntrack_proto_generic.c index f891308..36f2b5e 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_generic.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_generic.c @@ -12,7 +12,7 @@ #include <linux/netfilter.h> #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> -unsigned int ip_ct_generic_timeout = 600*HZ; +unsigned int ip_ct_generic_timeout __read_mostly = 600*HZ; static int generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, diff --git a/net/ipv4/netfilter/ip_conntrack_proto_gre.c b/net/ipv4/netfilter/ip_conntrack_proto_gre.c index 4ee016c..5fe026f 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_gre.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_gre.c @@ -1,15 +1,15 @@ /* - * ip_conntrack_proto_gre.c - Version 3.0 + * ip_conntrack_proto_gre.c - Version 3.0 * * Connection tracking protocol helper module for GRE. * * GRE is a generic encapsulation protocol, which is generally not very * suited for NAT, as it has no protocol-specific part as port numbers. * - * It has an optional key field, which may help us distinguishing two + * It has an optional key field, which may help us distinguishing two * connections between the same two hosts. * - * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 + * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 * * PPTP is built on top of a modified version of GRE, and has a mandatory * field called "CallID", which serves us for the same purpose as the key @@ -37,7 +37,6 @@ static DEFINE_RWLOCK(ip_ct_gre_lock); #define ASSERT_READ_LOCK(x) #define ASSERT_WRITE_LOCK(x) -#include <linux/netfilter_ipv4/listhelp.h> #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> #include <linux/netfilter_ipv4/ip_conntrack_helper.h> #include <linux/netfilter_ipv4/ip_conntrack_core.h> @@ -62,7 +61,7 @@ MODULE_DESCRIPTION("netfilter connection tracking protocol helper for GRE"); #define DEBUGP(x, args...) #define DUMP_TUPLE_GRE(x) #endif - + /* GRE KEYMAP HANDLING FUNCTIONS */ static LIST_HEAD(gre_keymap_list); @@ -82,12 +81,14 @@ static __be16 gre_keymap_lookup(struct ip_conntrack_tuple *t) __be16 key = 0; read_lock_bh(&ip_ct_gre_lock); - km = LIST_FIND(&gre_keymap_list, gre_key_cmpfn, - struct ip_ct_gre_keymap *, t); - if (km) - key = km->tuple.src.u.gre.key; + list_for_each_entry(km, &gre_keymap_list, list) { + if (gre_key_cmpfn(km, t)) { + key = km->tuple.src.u.gre.key; + break; + } + } read_unlock_bh(&ip_ct_gre_lock); - + DEBUGP("lookup src key 0x%x up key for ", key); DUMP_TUPLE_GRE(t); @@ -99,28 +100,25 @@ int ip_ct_gre_keymap_add(struct ip_conntrack *ct, struct ip_conntrack_tuple *t, int reply) { - struct ip_ct_gre_keymap **exist_km, *km, *old; + struct ip_ct_gre_keymap **exist_km, *km; if (!ct->helper || strcmp(ct->helper->name, "pptp")) { DEBUGP("refusing to add GRE keymap to non-pptp session\n"); return -1; } - if (!reply) + if (!reply) exist_km = &ct->help.ct_pptp_info.keymap_orig; else exist_km = &ct->help.ct_pptp_info.keymap_reply; if (*exist_km) { /* check whether it's a retransmission */ - old = LIST_FIND(&gre_keymap_list, gre_key_cmpfn, - struct ip_ct_gre_keymap *, t); - if (old == *exist_km) { - DEBUGP("retransmission\n"); - return 0; + list_for_each_entry(km, &gre_keymap_list, list) { + if (gre_key_cmpfn(km, t) && km == *exist_km) + return 0; } - - DEBUGP("trying to override keymap_%s for ct %p\n", + DEBUGP("trying to override keymap_%s for ct %p\n", reply? "reply":"orig", ct); return -EEXIST; } @@ -136,7 +134,7 @@ ip_ct_gre_keymap_add(struct ip_conntrack *ct, DUMP_TUPLE_GRE(&km->tuple); write_lock_bh(&ip_ct_gre_lock); - list_append(&gre_keymap_list, km); + list_add_tail(&km->list, &gre_keymap_list); write_unlock_bh(&ip_ct_gre_lock); return 0; @@ -154,7 +152,7 @@ void ip_ct_gre_keymap_destroy(struct ip_conntrack *ct) write_lock_bh(&ip_ct_gre_lock); if (ct->help.ct_pptp_info.keymap_orig) { - DEBUGP("removing %p from list\n", + DEBUGP("removing %p from list\n", ct->help.ct_pptp_info.keymap_orig); list_del(&ct->help.ct_pptp_info.keymap_orig->list); kfree(ct->help.ct_pptp_info.keymap_orig); @@ -222,7 +220,7 @@ static int gre_pkt_to_tuple(const struct sk_buff *skb, static int gre_print_tuple(struct seq_file *s, const struct ip_conntrack_tuple *tuple) { - return seq_printf(s, "srckey=0x%x dstkey=0x%x ", + return seq_printf(s, "srckey=0x%x dstkey=0x%x ", ntohs(tuple->src.u.gre.key), ntohs(tuple->dst.u.gre.key)); } @@ -252,14 +250,14 @@ static int gre_packet(struct ip_conntrack *ct, } else ip_ct_refresh_acct(ct, conntrackinfo, skb, ct->proto.gre.timeout); - + return NF_ACCEPT; } /* Called when a new connection for this protocol found. */ static int gre_new(struct ip_conntrack *ct, const struct sk_buff *skb) -{ +{ DEBUGP(": "); DUMP_TUPLE_GRE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple); @@ -285,9 +283,9 @@ static void gre_destroy(struct ip_conntrack *ct) } /* protocol helper struct */ -static struct ip_conntrack_protocol gre = { +static struct ip_conntrack_protocol gre = { .proto = IPPROTO_GRE, - .name = "gre", + .name = "gre", .pkt_to_tuple = gre_pkt_to_tuple, .invert_tuple = gre_invert_tuple, .print_tuple = gre_print_tuple, @@ -325,7 +323,7 @@ void ip_ct_proto_gre_fini(void) } write_unlock_bh(&ip_ct_gre_lock); - ip_conntrack_protocol_unregister(&gre); + ip_conntrack_protocol_unregister(&gre); } EXPORT_SYMBOL(ip_ct_gre_keymap_add); diff --git a/net/ipv4/netfilter/ip_conntrack_proto_icmp.c b/net/ipv4/netfilter/ip_conntrack_proto_icmp.c index 23f1c50..09c40eb 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_icmp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_icmp.c @@ -21,7 +21,7 @@ #include <linux/netfilter_ipv4/ip_conntrack_core.h> #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> -unsigned int ip_ct_icmp_timeout = 30*HZ; +unsigned int ip_ct_icmp_timeout __read_mostly = 30*HZ; #if 0 #define DEBUGP printk diff --git a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c index 2d3612c..b908a48 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c @@ -58,13 +58,13 @@ static const char *sctp_conntrack_names[] = { #define HOURS * 60 MINS #define DAYS * 24 HOURS -static unsigned int ip_ct_sctp_timeout_closed = 10 SECS; -static unsigned int ip_ct_sctp_timeout_cookie_wait = 3 SECS; -static unsigned int ip_ct_sctp_timeout_cookie_echoed = 3 SECS; -static unsigned int ip_ct_sctp_timeout_established = 5 DAYS; -static unsigned int ip_ct_sctp_timeout_shutdown_sent = 300 SECS / 1000; -static unsigned int ip_ct_sctp_timeout_shutdown_recd = 300 SECS / 1000; -static unsigned int ip_ct_sctp_timeout_shutdown_ack_sent = 3 SECS; +static unsigned int ip_ct_sctp_timeout_closed __read_mostly = 10 SECS; +static unsigned int ip_ct_sctp_timeout_cookie_wait __read_mostly = 3 SECS; +static unsigned int ip_ct_sctp_timeout_cookie_echoed __read_mostly = 3 SECS; +static unsigned int ip_ct_sctp_timeout_established __read_mostly = 5 DAYS; +static unsigned int ip_ct_sctp_timeout_shutdown_sent __read_mostly = 300 SECS / 1000; +static unsigned int ip_ct_sctp_timeout_shutdown_recd __read_mostly = 300 SECS / 1000; +static unsigned int ip_ct_sctp_timeout_shutdown_ack_sent __read_mostly = 3 SECS; static const unsigned int * sctp_timeouts[] = { NULL, /* SCTP_CONNTRACK_NONE */ diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c index fb920e7..03ae9a0 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c @@ -48,19 +48,19 @@ static DEFINE_RWLOCK(tcp_lock); /* "Be conservative in what you do, be liberal in what you accept from others." If it's non-zero, we mark only out of window RST segments as INVALID. */ -int ip_ct_tcp_be_liberal = 0; +int ip_ct_tcp_be_liberal __read_mostly = 0; /* When connection is picked up from the middle, how many packets are required to pass in each direction when we assume we are in sync - if any side uses window scaling, we lost the game. If it is set to zero, we disable picking up already established connections. */ -int ip_ct_tcp_loose = 3; +int ip_ct_tcp_loose __read_mostly = 3; /* Max number of the retransmitted packets without receiving an (acceptable) ACK from the destination. If this number is reached, a shorter timer will be started. */ -int ip_ct_tcp_max_retrans = 3; +int ip_ct_tcp_max_retrans __read_mostly = 3; /* FIXME: Examine ipfilter's timeouts and conntrack transitions more closely. They're more complex. --RR */ @@ -83,19 +83,19 @@ static const char *tcp_conntrack_names[] = { #define HOURS * 60 MINS #define DAYS * 24 HOURS -unsigned int ip_ct_tcp_timeout_syn_sent = 2 MINS; -unsigned int ip_ct_tcp_timeout_syn_recv = 60 SECS; -unsigned int ip_ct_tcp_timeout_established = 5 DAYS; -unsigned int ip_ct_tcp_timeout_fin_wait = 2 MINS; -unsigned int ip_ct_tcp_timeout_close_wait = 60 SECS; -unsigned int ip_ct_tcp_timeout_last_ack = 30 SECS; -unsigned int ip_ct_tcp_timeout_time_wait = 2 MINS; -unsigned int ip_ct_tcp_timeout_close = 10 SECS; +unsigned int ip_ct_tcp_timeout_syn_sent __read_mostly = 2 MINS; +unsigned int ip_ct_tcp_timeout_syn_recv __read_mostly = 60 SECS; +unsigned int ip_ct_tcp_timeout_established __read_mostly = 5 DAYS; +unsigned int ip_ct_tcp_timeout_fin_wait __read_mostly = 2 MINS; +unsigned int ip_ct_tcp_timeout_close_wait __read_mostly = 60 SECS; +unsigned int ip_ct_tcp_timeout_last_ack __read_mostly = 30 SECS; +unsigned int ip_ct_tcp_timeout_time_wait __read_mostly = 2 MINS; +unsigned int ip_ct_tcp_timeout_close __read_mostly = 10 SECS; /* RFC1122 says the R2 limit should be at least 100 seconds. Linux uses 15 packets as limit, which corresponds to ~13-30min depending on RTO. */ -unsigned int ip_ct_tcp_timeout_max_retrans = 5 MINS; +unsigned int ip_ct_tcp_timeout_max_retrans __read_mostly = 5 MINS; static const unsigned int * tcp_timeouts[] = { NULL, /* TCP_CONNTRACK_NONE */ @@ -731,13 +731,15 @@ static int tcp_in_window(struct ip_ct_tcp *state, if (state->last_dir == dir && state->last_seq == seq && state->last_ack == ack - && state->last_end == end) + && state->last_end == end + && state->last_win == win) state->retrans++; else { state->last_dir = dir; state->last_seq = seq; state->last_ack = ack; state->last_end = end; + state->last_win = win; state->retrans = 0; } } @@ -865,8 +867,7 @@ static int tcp_error(struct sk_buff *skb, /* Checksum invalid? Ignore. * We skip checking packets on the outgoing path - * because the semantic of CHECKSUM_HW is different there - * and moreover root might send raw packets. + * because it is assumed to be correct. */ /* FIXME: Source route IP option packets --RR */ if (ip_conntrack_checksum && hooknum == NF_IP_PRE_ROUTING && diff --git a/net/ipv4/netfilter/ip_conntrack_proto_udp.c b/net/ipv4/netfilter/ip_conntrack_proto_udp.c index 9b2c16b..d0e8a16 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_udp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_udp.c @@ -18,8 +18,8 @@ #include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> -unsigned int ip_ct_udp_timeout = 30*HZ; -unsigned int ip_ct_udp_timeout_stream = 180*HZ; +unsigned int ip_ct_udp_timeout __read_mostly = 30*HZ; +unsigned int ip_ct_udp_timeout_stream __read_mostly = 180*HZ; static int udp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, @@ -117,8 +117,7 @@ static int udp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo, /* Checksum invalid? Ignore. * We skip checking packets on the outgoing path - * because the semantic of CHECKSUM_HW is different there - * and moreover root might send raw packets. + * because the checksum is assumed to be correct. * FIXME: Source route IP option packets --RR */ if (ip_conntrack_checksum && hooknum == NF_IP_PRE_ROUTING && nf_ip_checksum(skb, hooknum, iph->ihl * 4, IPPROTO_UDP)) { diff --git a/net/ipv4/netfilter/ip_conntrack_sip.c b/net/ipv4/netfilter/ip_conntrack_sip.c index 4f222d6..2893e9c 100644 --- a/net/ipv4/netfilter/ip_conntrack_sip.c +++ b/net/ipv4/netfilter/ip_conntrack_sip.c @@ -8,7 +8,6 @@ * published by the Free Software Foundation. */ -#include <linux/config.h> #include <linux/module.h> #include <linux/ctype.h> #include <linux/skbuff.h> diff --git a/net/ipv4/netfilter/ip_conntrack_standalone.c b/net/ipv4/netfilter/ip_conntrack_standalone.c index 7a9fa04..0213575 100644 --- a/net/ipv4/netfilter/ip_conntrack_standalone.c +++ b/net/ipv4/netfilter/ip_conntrack_standalone.c @@ -35,7 +35,6 @@ #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> #include <linux/netfilter_ipv4/ip_conntrack_core.h> #include <linux/netfilter_ipv4/ip_conntrack_helper.h> -#include <linux/netfilter_ipv4/listhelp.h> #if 0 #define DEBUGP printk @@ -534,7 +533,7 @@ static struct nf_hook_ops ip_conntrack_ops[] = { /* Sysctl support */ -int ip_conntrack_checksum = 1; +int ip_conntrack_checksum __read_mostly = 1; #ifdef CONFIG_SYSCTL @@ -563,7 +562,7 @@ extern unsigned int ip_ct_udp_timeout_stream; /* From ip_conntrack_proto_icmp.c */ extern unsigned int ip_ct_icmp_timeout; -/* From ip_conntrack_proto_icmp.c */ +/* From ip_conntrack_proto_generic.c */ extern unsigned int ip_ct_generic_timeout; /* Log invalid packets of a given protocol */ diff --git a/net/ipv4/netfilter/ip_nat_core.c b/net/ipv4/netfilter/ip_nat_core.c index 1741d55..71f3e09 100644 --- a/net/ipv4/netfilter/ip_nat_core.c +++ b/net/ipv4/netfilter/ip_nat_core.c @@ -22,9 +22,6 @@ #include <linux/udp.h> #include <linux/jhash.h> -#define ASSERT_READ_LOCK(x) -#define ASSERT_WRITE_LOCK(x) - #include <linux/netfilter_ipv4/ip_conntrack.h> #include <linux/netfilter_ipv4/ip_conntrack_core.h> #include <linux/netfilter_ipv4/ip_conntrack_protocol.h> @@ -33,7 +30,6 @@ #include <linux/netfilter_ipv4/ip_nat_core.h> #include <linux/netfilter_ipv4/ip_nat_helper.h> #include <linux/netfilter_ipv4/ip_conntrack_helper.h> -#include <linux/netfilter_ipv4/listhelp.h> #if 0 #define DEBUGP printk @@ -101,18 +97,6 @@ static void ip_nat_cleanup_conntrack(struct ip_conntrack *conn) write_unlock_bh(&ip_nat_lock); } -/* We do checksum mangling, so if they were wrong before they're still - * wrong. Also works for incomplete packets (eg. ICMP dest - * unreachables.) */ -u_int16_t -ip_nat_cheat_check(u_int32_t oldvalinv, u_int32_t newval, u_int16_t oldcheck) -{ - u_int32_t diffs[] = { oldvalinv, newval }; - return csum_fold(csum_partial((char *)diffs, sizeof(diffs), - oldcheck^0xFFFF)); -} -EXPORT_SYMBOL(ip_nat_cheat_check); - /* Is this tuple already taken? (not by us) */ int ip_nat_used_tuple(const struct ip_conntrack_tuple *tuple, @@ -378,12 +362,12 @@ manip_pkt(u_int16_t proto, iph = (void *)(*pskb)->data + iphdroff; if (maniptype == IP_NAT_MANIP_SRC) { - iph->check = ip_nat_cheat_check(~iph->saddr, target->src.ip, - iph->check); + iph->check = nf_csum_update(~iph->saddr, target->src.ip, + iph->check); iph->saddr = target->src.ip; } else { - iph->check = ip_nat_cheat_check(~iph->daddr, target->dst.ip, - iph->check); + iph->check = nf_csum_update(~iph->daddr, target->dst.ip, + iph->check); iph->daddr = target->dst.ip; } return 1; @@ -423,10 +407,10 @@ unsigned int ip_nat_packet(struct ip_conntrack *ct, EXPORT_SYMBOL_GPL(ip_nat_packet); /* Dir is direction ICMP is coming from (opposite to packet it contains) */ -int ip_nat_icmp_reply_translation(struct sk_buff **pskb, - struct ip_conntrack *ct, - enum ip_nat_manip_type manip, - enum ip_conntrack_dir dir) +int ip_nat_icmp_reply_translation(struct ip_conntrack *ct, + enum ip_conntrack_info ctinfo, + unsigned int hooknum, + struct sk_buff **pskb) { struct { struct icmphdr icmp; @@ -434,7 +418,9 @@ int ip_nat_icmp_reply_translation(struct sk_buff **pskb, } *inside; struct ip_conntrack_tuple inner, target; int hdrlen = (*pskb)->nh.iph->ihl * 4; + enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); unsigned long statusbit; + enum ip_nat_manip_type manip = HOOK2MANIP(hooknum); if (!skb_make_writable(pskb, hdrlen + sizeof(*inside))) return 0; @@ -443,12 +429,8 @@ int ip_nat_icmp_reply_translation(struct sk_buff **pskb, /* We're actually going to mangle it beyond trivial checksum adjustment, so make sure the current checksum is correct. */ - if ((*pskb)->ip_summed != CHECKSUM_UNNECESSARY) { - hdrlen = (*pskb)->nh.iph->ihl * 4; - if ((u16)csum_fold(skb_checksum(*pskb, hdrlen, - (*pskb)->len - hdrlen, 0))) - return 0; - } + if (nf_ip_checksum(*pskb, hooknum, hdrlen, 0)) + return 0; /* Must be RELATED */ IP_NF_ASSERT((*pskb)->nfctinfo == IP_CT_RELATED || @@ -487,12 +469,14 @@ int ip_nat_icmp_reply_translation(struct sk_buff **pskb, !manip)) return 0; - /* Reloading "inside" here since manip_pkt inner. */ - inside = (void *)(*pskb)->data + (*pskb)->nh.iph->ihl*4; - inside->icmp.checksum = 0; - inside->icmp.checksum = csum_fold(skb_checksum(*pskb, hdrlen, - (*pskb)->len - hdrlen, - 0)); + if ((*pskb)->ip_summed != CHECKSUM_PARTIAL) { + /* Reloading "inside" here since manip_pkt inner. */ + inside = (void *)(*pskb)->data + (*pskb)->nh.iph->ihl*4; + inside->icmp.checksum = 0; + inside->icmp.checksum = csum_fold(skb_checksum(*pskb, hdrlen, + (*pskb)->len - hdrlen, + 0)); + } /* Change outer to look the reply to an incoming packet * (proto 0 means don't invert per-proto part). */ diff --git a/net/ipv4/netfilter/ip_nat_helper.c b/net/ipv4/netfilter/ip_nat_helper.c index cbcaa45..7f6a759 100644 --- a/net/ipv4/netfilter/ip_nat_helper.c +++ b/net/ipv4/netfilter/ip_nat_helper.c @@ -27,16 +27,12 @@ #include <net/tcp.h> #include <net/udp.h> -#define ASSERT_READ_LOCK(x) -#define ASSERT_WRITE_LOCK(x) - #include <linux/netfilter_ipv4/ip_conntrack.h> #include <linux/netfilter_ipv4/ip_conntrack_helper.h> #include <linux/netfilter_ipv4/ip_nat.h> #include <linux/netfilter_ipv4/ip_nat_protocol.h> #include <linux/netfilter_ipv4/ip_nat_core.h> #include <linux/netfilter_ipv4/ip_nat_helper.h> -#include <linux/netfilter_ipv4/listhelp.h> #if 0 #define DEBUGP printk @@ -165,7 +161,7 @@ ip_nat_mangle_tcp_packet(struct sk_buff **pskb, { struct iphdr *iph; struct tcphdr *tcph; - int datalen; + int oldlen, datalen; if (!skb_make_writable(pskb, (*pskb)->len)) return 0; @@ -180,13 +176,22 @@ ip_nat_mangle_tcp_packet(struct sk_buff **pskb, iph = (*pskb)->nh.iph; tcph = (void *)iph + iph->ihl*4; + oldlen = (*pskb)->len - iph->ihl*4; mangle_contents(*pskb, iph->ihl*4 + tcph->doff*4, match_offset, match_len, rep_buffer, rep_len); datalen = (*pskb)->len - iph->ihl*4; - tcph->check = 0; - tcph->check = tcp_v4_check(tcph, datalen, iph->saddr, iph->daddr, - csum_partial((char *)tcph, datalen, 0)); + if ((*pskb)->ip_summed != CHECKSUM_PARTIAL) { + tcph->check = 0; + tcph->check = tcp_v4_check(tcph, datalen, + iph->saddr, iph->daddr, + csum_partial((char *)tcph, + datalen, 0)); + } else + tcph->check = nf_proto_csum_update(*pskb, + htons(oldlen) ^ 0xFFFF, + htons(datalen), + tcph->check, 1); if (rep_len != match_len) { set_bit(IPS_SEQ_ADJUST_BIT, &ct->status); @@ -221,6 +226,7 @@ ip_nat_mangle_udp_packet(struct sk_buff **pskb, { struct iphdr *iph; struct udphdr *udph; + int datalen, oldlen; /* UDP helpers might accidentally mangle the wrong packet */ iph = (*pskb)->nh.iph; @@ -238,22 +244,32 @@ ip_nat_mangle_udp_packet(struct sk_buff **pskb, iph = (*pskb)->nh.iph; udph = (void *)iph + iph->ihl*4; + + oldlen = (*pskb)->len - iph->ihl*4; mangle_contents(*pskb, iph->ihl*4 + sizeof(*udph), match_offset, match_len, rep_buffer, rep_len); /* update the length of the UDP packet */ - udph->len = htons((*pskb)->len - iph->ihl*4); + datalen = (*pskb)->len - iph->ihl*4; + udph->len = htons(datalen); /* fix udp checksum if udp checksum was previously calculated */ - if (udph->check) { - int datalen = (*pskb)->len - iph->ihl * 4; + if (!udph->check && (*pskb)->ip_summed != CHECKSUM_PARTIAL) + return 1; + + if ((*pskb)->ip_summed != CHECKSUM_PARTIAL) { udph->check = 0; udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, datalen, IPPROTO_UDP, csum_partial((char *)udph, datalen, 0)); - } - + if (!udph->check) + udph->check = -1; + } else + udph->check = nf_proto_csum_update(*pskb, + htons(oldlen) ^ 0xFFFF, + htons(datalen), + udph->check, 1); return 1; } EXPORT_SYMBOL(ip_nat_mangle_udp_packet); @@ -293,11 +309,14 @@ sack_adjust(struct sk_buff *skb, ntohl(sack->start_seq), new_start_seq, ntohl(sack->end_seq), new_end_seq); - tcph->check = - ip_nat_cheat_check(~sack->start_seq, new_start_seq, - ip_nat_cheat_check(~sack->end_seq, - new_end_seq, - tcph->check)); + tcph->check = nf_proto_csum_update(skb, + ~sack->start_seq, + new_start_seq, + tcph->check, 0); + tcph->check = nf_proto_csum_update(skb, + ~sack->end_seq, + new_end_seq, + tcph->check, 0); sack->start_seq = new_start_seq; sack->end_seq = new_end_seq; sackoff += sizeof(*sack); @@ -381,10 +400,10 @@ ip_nat_seq_adjust(struct sk_buff **pskb, newack = ntohl(tcph->ack_seq) - other_way->offset_before; newack = htonl(newack); - tcph->check = ip_nat_cheat_check(~tcph->seq, newseq, - ip_nat_cheat_check(~tcph->ack_seq, - newack, - tcph->check)); + tcph->check = nf_proto_csum_update(*pskb, ~tcph->seq, newseq, + tcph->check, 0); + tcph->check = nf_proto_csum_update(*pskb, ~tcph->ack_seq, newack, + tcph->check, 0); DEBUGP("Adjusting sequence number from %u->%u, ack from %u->%u\n", ntohl(tcph->seq), ntohl(newseq), ntohl(tcph->ack_seq), diff --git a/net/ipv4/netfilter/ip_nat_helper_pptp.c b/net/ipv4/netfilter/ip_nat_helper_pptp.c index 1d14996..2ff5788 100644 --- a/net/ipv4/netfilter/ip_nat_helper_pptp.c +++ b/net/ipv4/netfilter/ip_nat_helper_pptp.c @@ -32,7 +32,7 @@ * 2005-06-10 - Version 3.0 * - kernel >= 2.6.11 version, * funded by Oxcoda NetBox Blue (http://www.netboxblue.com/) - * + * */ #include <linux/module.h> @@ -85,19 +85,17 @@ static void pptp_nat_expected(struct ip_conntrack *ct, DEBUGP("we are PNS->PAC\n"); /* therefore, build tuple for PAC->PNS */ t.src.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip; - t.src.u.gre.key = htons(master->help.ct_pptp_info.pac_call_id); + t.src.u.gre.key = master->help.ct_pptp_info.pac_call_id; t.dst.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip; - t.dst.u.gre.key = htons(master->help.ct_pptp_info.pns_call_id); + t.dst.u.gre.key = master->help.ct_pptp_info.pns_call_id; t.dst.protonum = IPPROTO_GRE; } else { DEBUGP("we are PAC->PNS\n"); /* build tuple for PNS->PAC */ t.src.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip; - t.src.u.gre.key = - htons(master->nat.help.nat_pptp_info.pns_call_id); + t.src.u.gre.key = master->nat.help.nat_pptp_info.pns_call_id; t.dst.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip; - t.dst.u.gre.key = - htons(master->nat.help.nat_pptp_info.pac_call_id); + t.dst.u.gre.key = master->nat.help.nat_pptp_info.pac_call_id; t.dst.protonum = IPPROTO_GRE; } @@ -149,51 +147,52 @@ pptp_outbound_pkt(struct sk_buff **pskb, { struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info; struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info; - u_int16_t msg, new_callid; + u_int16_t msg; + __be16 new_callid; unsigned int cid_off; - new_callid = htons(ct_pptp_info->pns_call_id); - + new_callid = ct_pptp_info->pns_call_id; + switch (msg = ntohs(ctlh->messageType)) { - case PPTP_OUT_CALL_REQUEST: - cid_off = offsetof(union pptp_ctrl_union, ocreq.callID); - /* FIXME: ideally we would want to reserve a call ID - * here. current netfilter NAT core is not able to do - * this :( For now we use TCP source port. This breaks - * multiple calls within one control session */ - - /* save original call ID in nat_info */ - nat_pptp_info->pns_call_id = ct_pptp_info->pns_call_id; - - /* don't use tcph->source since we are at a DSTmanip - * hook (e.g. PREROUTING) and pkt is not mangled yet */ - new_callid = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.tcp.port; - - /* save new call ID in ct info */ - ct_pptp_info->pns_call_id = ntohs(new_callid); - break; - case PPTP_IN_CALL_REPLY: - cid_off = offsetof(union pptp_ctrl_union, icreq.callID); - break; - case PPTP_CALL_CLEAR_REQUEST: - cid_off = offsetof(union pptp_ctrl_union, clrreq.callID); - break; - default: - DEBUGP("unknown outbound packet 0x%04x:%s\n", msg, - (msg <= PPTP_MSG_MAX)? - pptp_msg_name[msg]:pptp_msg_name[0]); - /* fall through */ - - case PPTP_SET_LINK_INFO: - /* only need to NAT in case PAC is behind NAT box */ - case PPTP_START_SESSION_REQUEST: - case PPTP_START_SESSION_REPLY: - case PPTP_STOP_SESSION_REQUEST: - case PPTP_STOP_SESSION_REPLY: - case PPTP_ECHO_REQUEST: - case PPTP_ECHO_REPLY: - /* no need to alter packet */ - return NF_ACCEPT; + case PPTP_OUT_CALL_REQUEST: + cid_off = offsetof(union pptp_ctrl_union, ocreq.callID); + /* FIXME: ideally we would want to reserve a call ID + * here. current netfilter NAT core is not able to do + * this :( For now we use TCP source port. This breaks + * multiple calls within one control session */ + + /* save original call ID in nat_info */ + nat_pptp_info->pns_call_id = ct_pptp_info->pns_call_id; + + /* don't use tcph->source since we are at a DSTmanip + * hook (e.g. PREROUTING) and pkt is not mangled yet */ + new_callid = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.tcp.port; + + /* save new call ID in ct info */ + ct_pptp_info->pns_call_id = new_callid; + break; + case PPTP_IN_CALL_REPLY: + cid_off = offsetof(union pptp_ctrl_union, icack.callID); + break; + case PPTP_CALL_CLEAR_REQUEST: + cid_off = offsetof(union pptp_ctrl_union, clrreq.callID); + break; + default: + DEBUGP("unknown outbound packet 0x%04x:%s\n", msg, + (msg <= PPTP_MSG_MAX)? + pptp_msg_name[msg]:pptp_msg_name[0]); + /* fall through */ + + case PPTP_SET_LINK_INFO: + /* only need to NAT in case PAC is behind NAT box */ + case PPTP_START_SESSION_REQUEST: + case PPTP_START_SESSION_REPLY: + case PPTP_STOP_SESSION_REQUEST: + case PPTP_STOP_SESSION_REPLY: + case PPTP_ECHO_REQUEST: + case PPTP_ECHO_REPLY: + /* no need to alter packet */ + return NF_ACCEPT; } /* only OUT_CALL_REQUEST, IN_CALL_REPLY, CALL_CLEAR_REQUEST pass @@ -212,80 +211,28 @@ pptp_outbound_pkt(struct sk_buff **pskb, return NF_ACCEPT; } -static int +static void pptp_exp_gre(struct ip_conntrack_expect *expect_orig, struct ip_conntrack_expect *expect_reply) { - struct ip_ct_pptp_master *ct_pptp_info = - &expect_orig->master->help.ct_pptp_info; - struct ip_nat_pptp *nat_pptp_info = - &expect_orig->master->nat.help.nat_pptp_info; - struct ip_conntrack *ct = expect_orig->master; - - struct ip_conntrack_tuple inv_t; - struct ip_conntrack_tuple *orig_t, *reply_t; + struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info; + struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info; /* save original PAC call ID in nat_info */ nat_pptp_info->pac_call_id = ct_pptp_info->pac_call_id; - /* alter expectation */ - orig_t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple; - reply_t = &ct->tuplehash[IP_CT_DIR_REPLY].tuple; - /* alter expectation for PNS->PAC direction */ - invert_tuplepr(&inv_t, &expect_orig->tuple); - expect_orig->saved_proto.gre.key = htons(ct_pptp_info->pns_call_id); - expect_orig->tuple.src.u.gre.key = htons(nat_pptp_info->pns_call_id); - expect_orig->tuple.dst.u.gre.key = htons(ct_pptp_info->pac_call_id); + expect_orig->saved_proto.gre.key = ct_pptp_info->pns_call_id; + expect_orig->tuple.src.u.gre.key = nat_pptp_info->pns_call_id; + expect_orig->tuple.dst.u.gre.key = ct_pptp_info->pac_call_id; expect_orig->dir = IP_CT_DIR_ORIGINAL; - inv_t.src.ip = reply_t->src.ip; - inv_t.dst.ip = reply_t->dst.ip; - inv_t.src.u.gre.key = htons(nat_pptp_info->pac_call_id); - inv_t.dst.u.gre.key = htons(ct_pptp_info->pns_call_id); - - if (!ip_conntrack_expect_related(expect_orig)) { - DEBUGP("successfully registered expect\n"); - } else { - DEBUGP("can't expect_related(expect_orig)\n"); - return 1; - } /* alter expectation for PAC->PNS direction */ - invert_tuplepr(&inv_t, &expect_reply->tuple); - expect_reply->saved_proto.gre.key = htons(nat_pptp_info->pns_call_id); - expect_reply->tuple.src.u.gre.key = htons(nat_pptp_info->pac_call_id); - expect_reply->tuple.dst.u.gre.key = htons(ct_pptp_info->pns_call_id); + expect_reply->saved_proto.gre.key = nat_pptp_info->pns_call_id; + expect_reply->tuple.src.u.gre.key = nat_pptp_info->pac_call_id; + expect_reply->tuple.dst.u.gre.key = ct_pptp_info->pns_call_id; expect_reply->dir = IP_CT_DIR_REPLY; - inv_t.src.ip = orig_t->src.ip; - inv_t.dst.ip = orig_t->dst.ip; - inv_t.src.u.gre.key = htons(nat_pptp_info->pns_call_id); - inv_t.dst.u.gre.key = htons(ct_pptp_info->pac_call_id); - - if (!ip_conntrack_expect_related(expect_reply)) { - DEBUGP("successfully registered expect\n"); - } else { - DEBUGP("can't expect_related(expect_reply)\n"); - ip_conntrack_unexpect_related(expect_orig); - return 1; - } - - if (ip_ct_gre_keymap_add(ct, &expect_reply->tuple, 0) < 0) { - DEBUGP("can't register original keymap\n"); - ip_conntrack_unexpect_related(expect_orig); - ip_conntrack_unexpect_related(expect_reply); - return 1; - } - - if (ip_ct_gre_keymap_add(ct, &inv_t, 1) < 0) { - DEBUGP("can't register reply keymap\n"); - ip_conntrack_unexpect_related(expect_orig); - ip_conntrack_unexpect_related(expect_reply); - ip_ct_gre_keymap_destroy(ct); - return 1; - } - - return 0; } /* inbound packets == from PAC to PNS */ @@ -297,15 +244,15 @@ pptp_inbound_pkt(struct sk_buff **pskb, union pptp_ctrl_union *pptpReq) { struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info; - u_int16_t msg, new_cid = 0, new_pcid; - unsigned int pcid_off, cid_off = 0; + u_int16_t msg; + __be16 new_pcid; + unsigned int pcid_off; - new_pcid = htons(nat_pptp_info->pns_call_id); + new_pcid = nat_pptp_info->pns_call_id; switch (msg = ntohs(ctlh->messageType)) { case PPTP_OUT_CALL_REPLY: pcid_off = offsetof(union pptp_ctrl_union, ocack.peersCallID); - cid_off = offsetof(union pptp_ctrl_union, ocack.callID); break; case PPTP_IN_CALL_CONNECT: pcid_off = offsetof(union pptp_ctrl_union, iccon.peersCallID); @@ -324,7 +271,7 @@ pptp_inbound_pkt(struct sk_buff **pskb, break; default: - DEBUGP("unknown inbound packet %s\n", (msg <= PPTP_MSG_MAX)? + DEBUGP("unknown inbound packet %s\n", (msg <= PPTP_MSG_MAX)? pptp_msg_name[msg]:pptp_msg_name[0]); /* fall through */ @@ -351,17 +298,6 @@ pptp_inbound_pkt(struct sk_buff **pskb, sizeof(new_pcid), (char *)&new_pcid, sizeof(new_pcid)) == 0) return NF_DROP; - - if (new_cid) { - DEBUGP("altering call id from 0x%04x to 0x%04x\n", - ntohs(REQ_CID(pptpReq, cid_off)), ntohs(new_cid)); - if (ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, - cid_off + sizeof(struct pptp_pkt_hdr) + - sizeof(struct PptpControlHeader), - sizeof(new_cid), (char *)&new_cid, - sizeof(new_cid)) == 0) - return NF_DROP; - } return NF_ACCEPT; } diff --git a/net/ipv4/netfilter/ip_nat_proto_gre.c b/net/ipv4/netfilter/ip_nat_proto_gre.c index 38acfdf..bf91f93 100644 --- a/net/ipv4/netfilter/ip_nat_proto_gre.c +++ b/net/ipv4/netfilter/ip_nat_proto_gre.c @@ -6,10 +6,10 @@ * GRE is a generic encapsulation protocol, which is generally not very * suited for NAT, as it has no protocol-specific part as port numbers. * - * It has an optional key field, which may help us distinguishing two + * It has an optional key field, which may help us distinguishing two * connections between the same two hosts. * - * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 + * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 * * PPTP is built on top of a modified version of GRE, and has a mandatory * field called "CallID", which serves us for the same purpose as the key @@ -60,14 +60,14 @@ gre_in_range(const struct ip_conntrack_tuple *tuple, } /* generate unique tuple ... */ -static int +static int gre_unique_tuple(struct ip_conntrack_tuple *tuple, const struct ip_nat_range *range, enum ip_nat_manip_type maniptype, const struct ip_conntrack *conntrack) { static u_int16_t key; - u_int16_t *keyptr; + __be16 *keyptr; unsigned int min, i, range_size; if (maniptype == IP_NAT_MANIP_SRC) @@ -84,7 +84,7 @@ gre_unique_tuple(struct ip_conntrack_tuple *tuple, range_size = ntohs(range->max.gre.key) - min + 1; } - DEBUGP("min = %u, range_size = %u\n", min, range_size); + DEBUGP("min = %u, range_size = %u\n", min, range_size); for (i = 0; i < range_size; i++, key++) { *keyptr = htons(min + key % range_size); @@ -117,7 +117,7 @@ gre_manip_pkt(struct sk_buff **pskb, greh = (void *)(*pskb)->data + hdroff; pgreh = (struct gre_hdr_pptp *) greh; - /* we only have destination manip of a packet, since 'source key' + /* we only have destination manip of a packet, since 'source key' * is not present in the packet itself */ if (maniptype == IP_NAT_MANIP_DST) { /* key manipulation is always dest */ @@ -129,15 +129,16 @@ gre_manip_pkt(struct sk_buff **pskb, } if (greh->csum) { /* FIXME: Never tested this code... */ - *(gre_csum(greh)) = - ip_nat_cheat_check(~*(gre_key(greh)), + *(gre_csum(greh)) = + nf_proto_csum_update(*pskb, + ~*(gre_key(greh)), tuple->dst.u.gre.key, - *(gre_csum(greh))); + *(gre_csum(greh)), 0); } *(gre_key(greh)) = tuple->dst.u.gre.key; break; case GRE_VERSION_PPTP: - DEBUGP("call_id -> 0x%04x\n", + DEBUGP("call_id -> 0x%04x\n", ntohs(tuple->dst.u.gre.key)); pgreh->call_id = tuple->dst.u.gre.key; break; @@ -151,8 +152,8 @@ gre_manip_pkt(struct sk_buff **pskb, } /* nat helper struct */ -static struct ip_nat_protocol gre = { - .name = "GRE", +static struct ip_nat_protocol gre = { + .name = "GRE", .protonum = IPPROTO_GRE, .manip_pkt = gre_manip_pkt, .in_range = gre_in_range, @@ -163,7 +164,7 @@ static struct ip_nat_protocol gre = { .nfattr_to_range = ip_nat_port_nfattr_to_range, #endif }; - + int __init ip_nat_proto_gre_init(void) { return ip_nat_protocol_register(&gre); diff --git a/net/ipv4/netfilter/ip_nat_proto_icmp.c b/net/ipv4/netfilter/ip_nat_proto_icmp.c index 31a3f4c..ec50cc2 100644 --- a/net/ipv4/netfilter/ip_nat_proto_icmp.c +++ b/net/ipv4/netfilter/ip_nat_proto_icmp.c @@ -66,10 +66,10 @@ icmp_manip_pkt(struct sk_buff **pskb, return 0; hdr = (struct icmphdr *)((*pskb)->data + hdroff); - - hdr->checksum = ip_nat_cheat_check(hdr->un.echo.id ^ 0xFFFF, - tuple->src.u.icmp.id, - hdr->checksum); + hdr->checksum = nf_proto_csum_update(*pskb, + hdr->un.echo.id ^ 0xFFFF, + tuple->src.u.icmp.id, + hdr->checksum, 0); hdr->un.echo.id = tuple->src.u.icmp.id; return 1; } diff --git a/net/ipv4/netfilter/ip_nat_proto_tcp.c b/net/ipv4/netfilter/ip_nat_proto_tcp.c index a3d1407..72a6307 100644 --- a/net/ipv4/netfilter/ip_nat_proto_tcp.c +++ b/net/ipv4/netfilter/ip_nat_proto_tcp.c @@ -129,10 +129,9 @@ tcp_manip_pkt(struct sk_buff **pskb, if (hdrsize < sizeof(*hdr)) return 1; - hdr->check = ip_nat_cheat_check(~oldip, newip, - ip_nat_cheat_check(oldport ^ 0xFFFF, - newport, - hdr->check)); + hdr->check = nf_proto_csum_update(*pskb, ~oldip, newip, hdr->check, 1); + hdr->check = nf_proto_csum_update(*pskb, oldport ^ 0xFFFF, newport, + hdr->check, 0); return 1; } diff --git a/net/ipv4/netfilter/ip_nat_proto_udp.c b/net/ipv4/netfilter/ip_nat_proto_udp.c index ec6053f..5da196a 100644 --- a/net/ipv4/netfilter/ip_nat_proto_udp.c +++ b/net/ipv4/netfilter/ip_nat_proto_udp.c @@ -113,11 +113,16 @@ udp_manip_pkt(struct sk_buff **pskb, newport = tuple->dst.u.udp.port; portptr = &hdr->dest; } - if (hdr->check) /* 0 is a special case meaning no checksum */ - hdr->check = ip_nat_cheat_check(~oldip, newip, - ip_nat_cheat_check(*portptr ^ 0xFFFF, - newport, - hdr->check)); + + if (hdr->check || (*pskb)->ip_summed == CHECKSUM_PARTIAL) { + hdr->check = nf_proto_csum_update(*pskb, ~oldip, newip, + hdr->check, 1); + hdr->check = nf_proto_csum_update(*pskb, + *portptr ^ 0xFFFF, newport, + hdr->check, 0); + if (!hdr->check) + hdr->check = -1; + } *portptr = newport; return 1; } diff --git a/net/ipv4/netfilter/ip_nat_rule.c b/net/ipv4/netfilter/ip_nat_rule.c index 1aba926..7b70383 100644 --- a/net/ipv4/netfilter/ip_nat_rule.c +++ b/net/ipv4/netfilter/ip_nat_rule.c @@ -19,14 +19,10 @@ #include <net/route.h> #include <linux/bitops.h> -#define ASSERT_READ_LOCK(x) -#define ASSERT_WRITE_LOCK(x) - #include <linux/netfilter_ipv4/ip_tables.h> #include <linux/netfilter_ipv4/ip_nat.h> #include <linux/netfilter_ipv4/ip_nat_core.h> #include <linux/netfilter_ipv4/ip_nat_rule.h> -#include <linux/netfilter_ipv4/listhelp.h> #if 0 #define DEBUGP printk @@ -104,8 +100,7 @@ static unsigned int ipt_snat_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct ipt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; @@ -147,8 +142,7 @@ static unsigned int ipt_dnat_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct ipt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; @@ -174,7 +168,6 @@ static int ipt_snat_checkentry(const char *tablename, const void *entry, const struct ipt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { struct ip_nat_multi_range_compat *mr = targinfo; @@ -191,7 +184,6 @@ static int ipt_dnat_checkentry(const char *tablename, const void *entry, const struct ipt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { struct ip_nat_multi_range_compat *mr = targinfo; @@ -255,7 +247,7 @@ int ip_nat_rule_find(struct sk_buff **pskb, { int ret; - ret = ipt_do_table(pskb, hooknum, in, out, &nat_table, NULL); + ret = ipt_do_table(pskb, hooknum, in, out, &nat_table); if (ret == NF_ACCEPT) { if (!ip_nat_initialized(ct, HOOK2MANIP(hooknum))) diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c index 17de077..9c577db 100644 --- a/net/ipv4/netfilter/ip_nat_standalone.c +++ b/net/ipv4/netfilter/ip_nat_standalone.c @@ -30,9 +30,6 @@ #include <net/checksum.h> #include <linux/spinlock.h> -#define ASSERT_READ_LOCK(x) -#define ASSERT_WRITE_LOCK(x) - #include <linux/netfilter_ipv4/ip_nat.h> #include <linux/netfilter_ipv4/ip_nat_rule.h> #include <linux/netfilter_ipv4/ip_nat_protocol.h> @@ -40,7 +37,6 @@ #include <linux/netfilter_ipv4/ip_nat_helper.h> #include <linux/netfilter_ipv4/ip_tables.h> #include <linux/netfilter_ipv4/ip_conntrack_core.h> -#include <linux/netfilter_ipv4/listhelp.h> #if 0 #define DEBUGP printk @@ -110,11 +106,6 @@ ip_nat_fn(unsigned int hooknum, IP_NF_ASSERT(!((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET))); - /* If we had a hardware checksum before, it's now invalid */ - if ((*pskb)->ip_summed == CHECKSUM_HW) - if (skb_checksum_help(*pskb, (out == NULL))) - return NF_DROP; - ct = ip_conntrack_get(*pskb, &ctinfo); /* Can't track? It's not due to stress, or conntrack would have dropped it. Hence it's the user's responsibilty to @@ -145,8 +136,8 @@ ip_nat_fn(unsigned int hooknum, case IP_CT_RELATED: case IP_CT_RELATED+IP_CT_IS_REPLY: if ((*pskb)->nh.iph->protocol == IPPROTO_ICMP) { - if (!ip_nat_icmp_reply_translation(pskb, ct, maniptype, - CTINFO2DIR(ctinfo))) + if (!ip_nat_icmp_reply_translation(ct, ctinfo, + hooknum, pskb)) return NF_DROP; else return NF_ACCEPT; diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c index 198ac36..7edad79 100644 --- a/net/ipv4/netfilter/ip_queue.c +++ b/net/ipv4/netfilter/ip_queue.c @@ -52,15 +52,15 @@ struct ipq_queue_entry { typedef int (*ipq_cmpfn)(struct ipq_queue_entry *, unsigned long); -static unsigned char copy_mode = IPQ_COPY_NONE; -static unsigned int queue_maxlen = IPQ_QMAX_DEFAULT; +static unsigned char copy_mode __read_mostly = IPQ_COPY_NONE; +static unsigned int queue_maxlen __read_mostly = IPQ_QMAX_DEFAULT; static DEFINE_RWLOCK(queue_lock); -static int peer_pid; -static unsigned int copy_range; +static int peer_pid __read_mostly; +static unsigned int copy_range __read_mostly; static unsigned int queue_total; static unsigned int queue_dropped = 0; static unsigned int queue_user_dropped = 0; -static struct sock *ipqnl; +static struct sock *ipqnl __read_mostly; static LIST_HEAD(queue_list); static DEFINE_MUTEX(ipqnl_mutex); @@ -208,9 +208,9 @@ ipq_build_packet_message(struct ipq_queue_entry *entry, int *errp) break; case IPQ_COPY_PACKET: - if (entry->skb->ip_summed == CHECKSUM_HW && - (*errp = skb_checksum_help(entry->skb, - entry->info->outdev == NULL))) { + if ((entry->skb->ip_summed == CHECKSUM_PARTIAL || + entry->skb->ip_summed == CHECKSUM_COMPLETE) && + (*errp = skb_checksum_help(entry->skb))) { read_unlock_bh(&queue_lock); return NULL; } diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c index 048514f..800067d 100644 --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -180,8 +180,7 @@ ipt_error(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { if (net_ratelimit()) printk("ip_tables: error: `%s'\n", (char *)targinfo); @@ -217,8 +216,7 @@ ipt_do_table(struct sk_buff **pskb, unsigned int hook, const struct net_device *in, const struct net_device *out, - struct ipt_table *table, - void *userdata) + struct ipt_table *table) { static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long)))); u_int16_t offset; @@ -308,8 +306,7 @@ ipt_do_table(struct sk_buff **pskb, in, out, hook, t->u.kernel.target, - t->data, - userdata); + t->data); #ifdef CONFIG_NETFILTER_DEBUG if (((struct ipt_entry *)table_base)->comefrom @@ -467,8 +464,7 @@ cleanup_match(struct ipt_entry_match *m, unsigned int *i) return 1; if (m->u.kernel.match->destroy) - m->u.kernel.match->destroy(m->u.kernel.match, m->data, - m->u.match_size - sizeof(*m)); + m->u.kernel.match->destroy(m->u.kernel.match, m->data); module_put(m->u.kernel.match->me); return 0; } @@ -521,7 +517,6 @@ check_match(struct ipt_entry_match *m, if (m->u.kernel.match->checkentry && !m->u.kernel.match->checkentry(name, ip, match, m->data, - m->u.match_size - sizeof(*m), hookmask)) { duprintf("ip_tables: check failed for `%s'.\n", m->u.kernel.match->name); @@ -578,12 +573,10 @@ check_entry(struct ipt_entry *e, const char *name, unsigned int size, if (t->u.kernel.target == &ipt_standard_target) { if (!standard_check(t, size)) { ret = -EINVAL; - goto cleanup_matches; + goto err; } } else if (t->u.kernel.target->checkentry && !t->u.kernel.target->checkentry(name, e, target, t->data, - t->u.target_size - - sizeof(*t), e->comefrom)) { duprintf("ip_tables: check failed for `%s'.\n", t->u.kernel.target->name); @@ -655,8 +648,7 @@ cleanup_entry(struct ipt_entry *e, unsigned int *i) IPT_MATCH_ITERATE(e, cleanup_match, NULL); t = ipt_get_target(e); if (t->u.kernel.target->destroy) - t->u.kernel.target->destroy(t->u.kernel.target, t->data, - t->u.target_size - sizeof(*t)); + t->u.kernel.target->destroy(t->u.kernel.target, t->data); module_put(t->u.kernel.target->me); return 0; } @@ -950,73 +942,28 @@ static short compat_calc_jump(u_int16_t offset) return delta; } -struct compat_ipt_standard_target +static void compat_standard_from_user(void *dst, void *src) { - struct compat_xt_entry_target target; - compat_int_t verdict; -}; - -struct compat_ipt_standard -{ - struct compat_ipt_entry entry; - struct compat_ipt_standard_target target; -}; + int v = *(compat_int_t *)src; -#define IPT_ST_LEN XT_ALIGN(sizeof(struct ipt_standard_target)) -#define IPT_ST_COMPAT_LEN COMPAT_XT_ALIGN(sizeof(struct compat_ipt_standard_target)) -#define IPT_ST_OFFSET (IPT_ST_LEN - IPT_ST_COMPAT_LEN) + if (v > 0) + v += compat_calc_jump(v); + memcpy(dst, &v, sizeof(v)); +} -static int compat_ipt_standard_fn(void *target, - void **dstptr, int *size, int convert) +static int compat_standard_to_user(void __user *dst, void *src) { - struct compat_ipt_standard_target compat_st, *pcompat_st; - struct ipt_standard_target st, *pst; - int ret; + compat_int_t cv = *(int *)src; - ret = 0; - switch (convert) { - case COMPAT_TO_USER: - pst = target; - memcpy(&compat_st.target, &pst->target, - sizeof(compat_st.target)); - compat_st.verdict = pst->verdict; - if (compat_st.verdict > 0) - compat_st.verdict -= - compat_calc_jump(compat_st.verdict); - compat_st.target.u.user.target_size = IPT_ST_COMPAT_LEN; - if (copy_to_user(*dstptr, &compat_st, IPT_ST_COMPAT_LEN)) - ret = -EFAULT; - *size -= IPT_ST_OFFSET; - *dstptr += IPT_ST_COMPAT_LEN; - break; - case COMPAT_FROM_USER: - pcompat_st = target; - memcpy(&st.target, &pcompat_st->target, IPT_ST_COMPAT_LEN); - st.verdict = pcompat_st->verdict; - if (st.verdict > 0) - st.verdict += compat_calc_jump(st.verdict); - st.target.u.user.target_size = IPT_ST_LEN; - memcpy(*dstptr, &st, IPT_ST_LEN); - *size += IPT_ST_OFFSET; - *dstptr += IPT_ST_LEN; - break; - case COMPAT_CALC_SIZE: - *size += IPT_ST_OFFSET; - break; - default: - ret = -ENOPROTOOPT; - break; - } - return ret; + if (cv > 0) + cv -= compat_calc_jump(cv); + return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0; } static inline int compat_calc_match(struct ipt_entry_match *m, int * size) { - if (m->u.kernel.match->compat) - m->u.kernel.match->compat(m, NULL, size, COMPAT_CALC_SIZE); - else - xt_compat_match(m, NULL, size, COMPAT_CALC_SIZE); + *size += xt_compat_match_offset(m->u.kernel.match); return 0; } @@ -1031,10 +978,7 @@ static int compat_calc_entry(struct ipt_entry *e, struct xt_table_info *info, entry_offset = (void *)e - base; IPT_MATCH_ITERATE(e, compat_calc_match, &off); t = ipt_get_target(e); - if (t->u.kernel.target->compat) - t->u.kernel.target->compat(t, NULL, &off, COMPAT_CALC_SIZE); - else - xt_compat_target(t, NULL, &off, COMPAT_CALC_SIZE); + off += xt_compat_target_offset(t->u.kernel.target); newinfo->size -= off; ret = compat_add_offset(entry_offset, off); if (ret) @@ -1420,17 +1364,13 @@ struct compat_ipt_replace { }; static inline int compat_copy_match_to_user(struct ipt_entry_match *m, - void __user **dstptr, compat_uint_t *size) + void * __user *dstptr, compat_uint_t *size) { - if (m->u.kernel.match->compat) - return m->u.kernel.match->compat(m, dstptr, size, - COMPAT_TO_USER); - else - return xt_compat_match(m, dstptr, size, COMPAT_TO_USER); + return xt_compat_match_to_user(m, dstptr, size); } static int compat_copy_entry_to_user(struct ipt_entry *e, - void __user **dstptr, compat_uint_t *size) + void * __user *dstptr, compat_uint_t *size) { struct ipt_entry_target __user *t; struct compat_ipt_entry __user *ce; @@ -1450,11 +1390,7 @@ static int compat_copy_entry_to_user(struct ipt_entry *e, if (ret) goto out; t = ipt_get_target(e); - if (t->u.kernel.target->compat) - ret = t->u.kernel.target->compat(t, dstptr, size, - COMPAT_TO_USER); - else - ret = xt_compat_target(t, dstptr, size, COMPAT_TO_USER); + ret = xt_compat_target_to_user(t, dstptr, size); if (ret) goto out; ret = -EFAULT; @@ -1486,11 +1422,7 @@ compat_check_calc_match(struct ipt_entry_match *m, return match ? PTR_ERR(match) : -ENOENT; } m->u.kernel.match = match; - - if (m->u.kernel.match->compat) - m->u.kernel.match->compat(m, NULL, size, COMPAT_CALC_SIZE); - else - xt_compat_match(m, NULL, size, COMPAT_CALC_SIZE); + *size += xt_compat_match_offset(match); (*i)++; return 0; @@ -1537,7 +1469,7 @@ check_compat_entry_size_and_hooks(struct ipt_entry *e, ret = IPT_MATCH_ITERATE(e, compat_check_calc_match, name, &e->ip, e->comefrom, &off, &j); if (ret != 0) - goto out; + goto cleanup_matches; t = ipt_get_target(e); target = try_then_request_module(xt_find_target(AF_INET, @@ -1547,14 +1479,11 @@ check_compat_entry_size_and_hooks(struct ipt_entry *e, if (IS_ERR(target) || !target) { duprintf("check_entry: `%s' not found\n", t->u.user.name); ret = target ? PTR_ERR(target) : -ENOENT; - goto out; + goto cleanup_matches; } t->u.kernel.target = target; - if (t->u.kernel.target->compat) - t->u.kernel.target->compat(t, NULL, &off, COMPAT_CALC_SIZE); - else - xt_compat_target(t, NULL, &off, COMPAT_CALC_SIZE); + off += xt_compat_target_offset(target); *size += off; ret = compat_add_offset(entry_offset, off); if (ret) @@ -1574,14 +1503,17 @@ check_compat_entry_size_and_hooks(struct ipt_entry *e, (*i)++; return 0; + out: + module_put(t->u.kernel.target->me); +cleanup_matches: IPT_MATCH_ITERATE(e, cleanup_match, &j); return ret; } static inline int compat_copy_match_from_user(struct ipt_entry_match *m, void **dstptr, compat_uint_t *size, const char *name, - const struct ipt_ip *ip, unsigned int hookmask) + const struct ipt_ip *ip, unsigned int hookmask, int *i) { struct ipt_entry_match *dm; struct ipt_match *match; @@ -1589,26 +1521,28 @@ static inline int compat_copy_match_from_user(struct ipt_entry_match *m, dm = (struct ipt_entry_match *)*dstptr; match = m->u.kernel.match; - if (match->compat) - match->compat(m, dstptr, size, COMPAT_FROM_USER); - else - xt_compat_match(m, dstptr, size, COMPAT_FROM_USER); + xt_compat_match_from_user(m, dstptr, size); ret = xt_check_match(match, AF_INET, dm->u.match_size - sizeof(*dm), name, hookmask, ip->proto, ip->invflags & IPT_INV_PROTO); if (ret) - return ret; + goto err; if (m->u.kernel.match->checkentry && !m->u.kernel.match->checkentry(name, ip, match, dm->data, - dm->u.match_size - sizeof(*dm), hookmask)) { duprintf("ip_tables: check failed for `%s'.\n", m->u.kernel.match->name); - return -EINVAL; + ret = -EINVAL; + goto err; } + (*i)++; return 0; + +err: + module_put(m->u.kernel.match->me); + return ret; } static int compat_copy_entry_from_user(struct ipt_entry *e, void **dstptr, @@ -1619,25 +1553,23 @@ static int compat_copy_entry_from_user(struct ipt_entry *e, void **dstptr, struct ipt_target *target; struct ipt_entry *de; unsigned int origsize; - int ret, h; + int ret, h, j; ret = 0; origsize = *size; de = (struct ipt_entry *)*dstptr; memcpy(de, e, sizeof(struct ipt_entry)); + j = 0; *dstptr += sizeof(struct compat_ipt_entry); ret = IPT_MATCH_ITERATE(e, compat_copy_match_from_user, dstptr, size, - name, &de->ip, de->comefrom); + name, &de->ip, de->comefrom, &j); if (ret) - goto out; + goto cleanup_matches; de->target_offset = e->target_offset - (origsize - *size); t = ipt_get_target(e); target = t->u.kernel.target; - if (target->compat) - target->compat(t, dstptr, size, COMPAT_FROM_USER); - else - xt_compat_target(t, dstptr, size, COMPAT_FROM_USER); + xt_compat_target_from_user(t, dstptr, size); de->next_offset = e->next_offset - (origsize - *size); for (h = 0; h < NF_IP_NUMHOOKS; h++) { @@ -1653,22 +1585,26 @@ static int compat_copy_entry_from_user(struct ipt_entry *e, void **dstptr, name, e->comefrom, e->ip.proto, e->ip.invflags & IPT_INV_PROTO); if (ret) - goto out; + goto err; ret = -EINVAL; if (t->u.kernel.target == &ipt_standard_target) { if (!standard_check(t, *size)) - goto out; + goto err; } else if (t->u.kernel.target->checkentry && !t->u.kernel.target->checkentry(name, de, target, - t->data, t->u.target_size - sizeof(*t), - de->comefrom)) { + t->data, de->comefrom)) { duprintf("ip_tables: compat: check failed for `%s'.\n", t->u.kernel.target->name); - goto out; + goto err; } ret = 0; -out: + return ret; + +err: + module_put(t->u.kernel.target->me); +cleanup_matches: + IPT_MATCH_ITERATE(e, cleanup_match, &j); return ret; } @@ -1989,6 +1925,8 @@ compat_get_entries(struct compat_ipt_get_entries __user *uptr, int *len) return ret; } +static int do_ipt_get_ctl(struct sock *, int, void __user *, int *); + static int compat_do_ipt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) { @@ -2002,8 +1940,7 @@ compat_do_ipt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) ret = compat_get_entries(user, len); break; default: - duprintf("compat_do_ipt_get_ctl: unknown request %i\n", cmd); - ret = -EINVAL; + ret = do_ipt_get_ctl(sk, cmd, user, len); } return ret; } @@ -2185,7 +2122,6 @@ icmp_checkentry(const char *tablename, const void *info, const struct xt_match *match, void *matchinfo, - unsigned int matchsize, unsigned int hook_mask) { const struct ipt_icmp *icmpinfo = matchinfo; @@ -2200,7 +2136,9 @@ static struct ipt_target ipt_standard_target = { .targetsize = sizeof(int), .family = AF_INET, #ifdef CONFIG_COMPAT - .compat = &compat_ipt_standard_fn, + .compatsize = sizeof(compat_int_t), + .compat_from_user = compat_standard_from_user, + .compat_to_user = compat_standard_to_user, #endif }; diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c index d994c5f..4158966 100644 --- a/net/ipv4/netfilter/ipt_CLUSTERIP.c +++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c @@ -302,8 +302,7 @@ target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { const struct ipt_clusterip_tgt_info *cipinfo = targinfo; enum ip_conntrack_info ctinfo; @@ -373,7 +372,6 @@ checkentry(const char *tablename, const void *e_void, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { struct ipt_clusterip_tgt_info *cipinfo = targinfo; @@ -450,8 +448,7 @@ checkentry(const char *tablename, } /* drop reference count of cluster config when rule is deleted */ -static void destroy(const struct xt_target *target, void *targinfo, - unsigned int targinfosize) +static void destroy(const struct xt_target *target, void *targinfo) { struct ipt_clusterip_tgt_info *cipinfo = targinfo; diff --git a/net/ipv4/netfilter/ipt_DSCP.c b/net/ipv4/netfilter/ipt_DSCP.c deleted file mode 100644 index c8e9712..0000000 --- a/net/ipv4/netfilter/ipt_DSCP.c +++ /dev/null @@ -1,96 +0,0 @@ -/* iptables module for setting the IPv4 DSCP field, Version 1.8 - * - * (C) 2002 by Harald Welte <laforge@netfilter.org> - * based on ipt_FTOS.c (C) 2000 by Matthew G. Marsh <mgm@paktronix.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * See RFC2474 for a description of the DSCP field within the IP Header. - * - * ipt_DSCP.c,v 1.8 2002/08/06 18:41:57 laforge Exp -*/ - -#include <linux/module.h> -#include <linux/skbuff.h> -#include <linux/ip.h> -#include <net/checksum.h> - -#include <linux/netfilter_ipv4/ip_tables.h> -#include <linux/netfilter_ipv4/ipt_DSCP.h> - -MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); -MODULE_DESCRIPTION("iptables DSCP modification module"); -MODULE_LICENSE("GPL"); - -static unsigned int -target(struct sk_buff **pskb, - const struct net_device *in, - const struct net_device *out, - unsigned int hooknum, - const struct xt_target *target, - const void *targinfo, - void *userinfo) -{ - const struct ipt_DSCP_info *dinfo = targinfo; - u_int8_t sh_dscp = ((dinfo->dscp << IPT_DSCP_SHIFT) & IPT_DSCP_MASK); - - - if (((*pskb)->nh.iph->tos & IPT_DSCP_MASK) != sh_dscp) { - u_int16_t diffs[2]; - - if (!skb_make_writable(pskb, sizeof(struct iphdr))) - return NF_DROP; - - diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF; - (*pskb)->nh.iph->tos = ((*pskb)->nh.iph->tos & ~IPT_DSCP_MASK) - | sh_dscp; - diffs[1] = htons((*pskb)->nh.iph->tos); - (*pskb)->nh.iph->check - = csum_fold(csum_partial((char *)diffs, - sizeof(diffs), - (*pskb)->nh.iph->check - ^ 0xFFFF)); - } - return IPT_CONTINUE; -} - -static int -checkentry(const char *tablename, - const void *e_void, - const struct xt_target *target, - void *targinfo, - unsigned int targinfosize, - unsigned int hook_mask) -{ - const u_int8_t dscp = ((struct ipt_DSCP_info *)targinfo)->dscp; - - if ((dscp > IPT_DSCP_MAX)) { - printk(KERN_WARNING "DSCP: dscp %x out of range\n", dscp); - return 0; - } - return 1; -} - -static struct ipt_target ipt_dscp_reg = { - .name = "DSCP", - .target = target, - .targetsize = sizeof(struct ipt_DSCP_info), - .table = "mangle", - .checkentry = checkentry, - .me = THIS_MODULE, -}; - -static int __init ipt_dscp_init(void) -{ - return ipt_register_target(&ipt_dscp_reg); -} - -static void __exit ipt_dscp_fini(void) -{ - ipt_unregister_target(&ipt_dscp_reg); -} - -module_init(ipt_dscp_init); -module_exit(ipt_dscp_fini); diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c index 4adf5c9..23f9c7e 100644 --- a/net/ipv4/netfilter/ipt_ECN.c +++ b/net/ipv4/netfilter/ipt_ECN.c @@ -27,32 +27,28 @@ MODULE_DESCRIPTION("iptables ECN modification module"); static inline int set_ect_ip(struct sk_buff **pskb, const struct ipt_ECN_info *einfo) { - if (((*pskb)->nh.iph->tos & IPT_ECN_IP_MASK) - != (einfo->ip_ect & IPT_ECN_IP_MASK)) { - u_int16_t diffs[2]; + struct iphdr *iph = (*pskb)->nh.iph; + u_int16_t oldtos; + if ((iph->tos & IPT_ECN_IP_MASK) != (einfo->ip_ect & IPT_ECN_IP_MASK)) { if (!skb_make_writable(pskb, sizeof(struct iphdr))) return 0; - - diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF; - (*pskb)->nh.iph->tos &= ~IPT_ECN_IP_MASK; - (*pskb)->nh.iph->tos |= (einfo->ip_ect & IPT_ECN_IP_MASK); - diffs[1] = htons((*pskb)->nh.iph->tos); - (*pskb)->nh.iph->check - = csum_fold(csum_partial((char *)diffs, - sizeof(diffs), - (*pskb)->nh.iph->check - ^0xFFFF)); + iph = (*pskb)->nh.iph; + oldtos = iph->tos; + iph->tos &= ~IPT_ECN_IP_MASK; + iph->tos |= (einfo->ip_ect & IPT_ECN_IP_MASK); + iph->check = nf_csum_update(oldtos ^ 0xFFFF, iph->tos, + iph->check); } return 1; } /* Return 0 if there was an error. */ static inline int -set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward) +set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo) { struct tcphdr _tcph, *tcph; - u_int16_t diffs[2]; + u_int16_t oldval; /* Not enought header? */ tcph = skb_header_pointer(*pskb, (*pskb)->nh.iph->ihl*4, @@ -70,22 +66,16 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward) return 0; tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4; - if ((*pskb)->ip_summed == CHECKSUM_HW && - skb_checksum_help(*pskb, inward)) - return 0; - - diffs[0] = ((u_int16_t *)tcph)[6]; + oldval = ((u_int16_t *)tcph)[6]; if (einfo->operation & IPT_ECN_OP_SET_ECE) tcph->ece = einfo->proto.tcp.ece; if (einfo->operation & IPT_ECN_OP_SET_CWR) tcph->cwr = einfo->proto.tcp.cwr; - diffs[1] = ((u_int16_t *)tcph)[6]; - diffs[0] = diffs[0] ^ 0xFFFF; - if ((*pskb)->ip_summed != CHECKSUM_UNNECESSARY) - tcph->check = csum_fold(csum_partial((char *)diffs, - sizeof(diffs), - tcph->check^0xFFFF)); + tcph->check = nf_proto_csum_update((*pskb), + oldval ^ 0xFFFF, + ((u_int16_t *)tcph)[6], + tcph->check, 0); return 1; } @@ -95,8 +85,7 @@ target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { const struct ipt_ECN_info *einfo = targinfo; @@ -106,7 +95,7 @@ target(struct sk_buff **pskb, if (einfo->operation & (IPT_ECN_OP_SET_ECE | IPT_ECN_OP_SET_CWR) && (*pskb)->nh.iph->protocol == IPPROTO_TCP) - if (!set_ect_tcp(pskb, einfo, (out == NULL))) + if (!set_ect_tcp(pskb, einfo)) return NF_DROP; return IPT_CONTINUE; @@ -117,7 +106,6 @@ checkentry(const char *tablename, const void *e_void, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ipt_ECN_info *einfo = (struct ipt_ECN_info *)targinfo; diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c index b98f7b0..7dc820d 100644 --- a/net/ipv4/netfilter/ipt_LOG.c +++ b/net/ipv4/netfilter/ipt_LOG.c @@ -416,8 +416,7 @@ ipt_log_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { const struct ipt_log_info *loginfo = targinfo; struct nf_loginfo li; @@ -440,7 +439,6 @@ static int ipt_log_checkentry(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ipt_log_info *loginfo = targinfo; diff --git a/net/ipv4/netfilter/ipt_MASQUERADE.c b/net/ipv4/netfilter/ipt_MASQUERADE.c index ebd94f2..bc65168 100644 --- a/net/ipv4/netfilter/ipt_MASQUERADE.c +++ b/net/ipv4/netfilter/ipt_MASQUERADE.c @@ -42,7 +42,6 @@ masquerade_check(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ip_nat_multi_range_compat *mr = targinfo; @@ -64,8 +63,7 @@ masquerade_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; diff --git a/net/ipv4/netfilter/ipt_NETMAP.c b/net/ipv4/netfilter/ipt_NETMAP.c index 736c4b5..beb2914 100644 --- a/net/ipv4/netfilter/ipt_NETMAP.c +++ b/net/ipv4/netfilter/ipt_NETMAP.c @@ -33,7 +33,6 @@ check(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ip_nat_multi_range_compat *mr = targinfo; @@ -55,8 +54,7 @@ target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; diff --git a/net/ipv4/netfilter/ipt_REDIRECT.c b/net/ipv4/netfilter/ipt_REDIRECT.c index f290463..f03d436 100644 --- a/net/ipv4/netfilter/ipt_REDIRECT.c +++ b/net/ipv4/netfilter/ipt_REDIRECT.c @@ -36,7 +36,6 @@ redirect_check(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ip_nat_multi_range_compat *mr = targinfo; @@ -58,8 +57,7 @@ redirect_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c index 269bc20..b81821e 100644 --- a/net/ipv4/netfilter/ipt_REJECT.c +++ b/net/ipv4/netfilter/ipt_REJECT.c @@ -90,6 +90,7 @@ static inline struct rtable *route_reverse(struct sk_buff *skb, fl.proto = IPPROTO_TCP; fl.fl_ip_sport = tcph->dest; fl.fl_ip_dport = tcph->source; + security_skb_classify_flow(skb, &fl); xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0); @@ -184,6 +185,7 @@ static void send_reset(struct sk_buff *oldskb, int hook) tcph->urg_ptr = 0; /* Adjust TCP checksum */ + nskb->ip_summed = CHECKSUM_NONE; tcph->check = 0; tcph->check = tcp_v4_check(tcph, sizeof(struct tcphdr), nskb->nh.iph->saddr, @@ -226,8 +228,7 @@ static unsigned int reject(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { const struct ipt_reject_info *reject = targinfo; @@ -275,7 +276,6 @@ static int check(const char *tablename, const void *e_void, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ipt_reject_info *rejinfo = targinfo; diff --git a/net/ipv4/netfilter/ipt_SAME.c b/net/ipv4/netfilter/ipt_SAME.c index 7169b09..efbcb11 100644 --- a/net/ipv4/netfilter/ipt_SAME.c +++ b/net/ipv4/netfilter/ipt_SAME.c @@ -52,7 +52,6 @@ same_check(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { unsigned int count, countess, rangeip, index = 0; @@ -116,8 +115,7 @@ same_check(const char *tablename, } static void -same_destroy(const struct xt_target *target, void *targinfo, - unsigned int targinfosize) +same_destroy(const struct xt_target *target, void *targinfo) { struct ipt_same_info *mr = targinfo; @@ -133,8 +131,7 @@ same_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { struct ip_conntrack *ct; enum ip_conntrack_info ctinfo; diff --git a/net/ipv4/netfilter/ipt_TCPMSS.c b/net/ipv4/netfilter/ipt_TCPMSS.c index ef2fe5b..4246c43 100644 --- a/net/ipv4/netfilter/ipt_TCPMSS.c +++ b/net/ipv4/netfilter/ipt_TCPMSS.c @@ -21,26 +21,14 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>"); MODULE_DESCRIPTION("iptables TCP MSS modification module"); -#if 0 -#define DEBUGP printk -#else -#define DEBUGP(format, args...) -#endif - -static u_int16_t -cheat_check(u_int32_t oldvalinv, u_int32_t newval, u_int16_t oldcheck) -{ - u_int32_t diffs[] = { oldvalinv, newval }; - return csum_fold(csum_partial((char *)diffs, sizeof(diffs), - oldcheck^0xFFFF)); -} - static inline unsigned int optlen(const u_int8_t *opt, unsigned int offset) { /* Beware zero-length options: make finite progress */ - if (opt[offset] <= TCPOPT_NOP || opt[offset+1] == 0) return 1; - else return opt[offset+1]; + if (opt[offset] <= TCPOPT_NOP || opt[offset+1] == 0) + return 1; + else + return opt[offset+1]; } static unsigned int @@ -49,8 +37,7 @@ ipt_tcpmss_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { const struct ipt_tcpmss_info *tcpmssinfo = targinfo; struct tcphdr *tcph; @@ -62,13 +49,8 @@ ipt_tcpmss_target(struct sk_buff **pskb, if (!skb_make_writable(pskb, (*pskb)->len)) return NF_DROP; - if ((*pskb)->ip_summed == CHECKSUM_HW && - skb_checksum_help(*pskb, out == NULL)) - return NF_DROP; - iph = (*pskb)->nh.iph; tcplen = (*pskb)->len - iph->ihl*4; - tcph = (void *)iph + iph->ihl*4; /* Since it passed flags test in tcp match, we know it is is @@ -84,54 +66,41 @@ ipt_tcpmss_target(struct sk_buff **pskb, return NF_DROP; } - if(tcpmssinfo->mss == IPT_TCPMSS_CLAMP_PMTU) { - if(!(*pskb)->dst) { + if (tcpmssinfo->mss == IPT_TCPMSS_CLAMP_PMTU) { + if (dst_mtu((*pskb)->dst) <= sizeof(struct iphdr) + + sizeof(struct tcphdr)) { if (net_ratelimit()) - printk(KERN_ERR - "ipt_tcpmss_target: no dst?! can't determine path-MTU\n"); + printk(KERN_ERR "ipt_tcpmss_target: " + "unknown or invalid path-MTU (%d)\n", + dst_mtu((*pskb)->dst)); return NF_DROP; /* or IPT_CONTINUE ?? */ } - if(dst_mtu((*pskb)->dst) <= (sizeof(struct iphdr) + sizeof(struct tcphdr))) { - if (net_ratelimit()) - printk(KERN_ERR - "ipt_tcpmss_target: unknown or invalid path-MTU (%d)\n", dst_mtu((*pskb)->dst)); - return NF_DROP; /* or IPT_CONTINUE ?? */ - } - - newmss = dst_mtu((*pskb)->dst) - sizeof(struct iphdr) - sizeof(struct tcphdr); + newmss = dst_mtu((*pskb)->dst) - sizeof(struct iphdr) - + sizeof(struct tcphdr); } else newmss = tcpmssinfo->mss; opt = (u_int8_t *)tcph; - for (i = sizeof(struct tcphdr); i < tcph->doff*4; i += optlen(opt, i)){ - if ((opt[i] == TCPOPT_MSS) && - ((tcph->doff*4 - i) >= TCPOLEN_MSS) && - (opt[i+1] == TCPOLEN_MSS)) { + for (i = sizeof(struct tcphdr); i < tcph->doff*4; i += optlen(opt, i)) { + if (opt[i] == TCPOPT_MSS && tcph->doff*4 - i >= TCPOLEN_MSS && + opt[i+1] == TCPOLEN_MSS) { u_int16_t oldmss; oldmss = (opt[i+2] << 8) | opt[i+3]; - if((tcpmssinfo->mss == IPT_TCPMSS_CLAMP_PMTU) && - (oldmss <= newmss)) - return IPT_CONTINUE; + if (tcpmssinfo->mss == IPT_TCPMSS_CLAMP_PMTU && + oldmss <= newmss) + return IPT_CONTINUE; opt[i+2] = (newmss & 0xff00) >> 8; opt[i+3] = (newmss & 0x00ff); - tcph->check = cheat_check(htons(oldmss)^0xFFFF, - htons(newmss), - tcph->check); - - DEBUGP(KERN_INFO "ipt_tcpmss_target: %u.%u.%u.%u:%hu" - "->%u.%u.%u.%u:%hu changed TCP MSS option" - " (from %u to %u)\n", - NIPQUAD((*pskb)->nh.iph->saddr), - ntohs(tcph->source), - NIPQUAD((*pskb)->nh.iph->daddr), - ntohs(tcph->dest), - oldmss, newmss); - goto retmodified; + tcph->check = nf_proto_csum_update(*pskb, + htons(oldmss)^0xFFFF, + htons(newmss), + tcph->check, 0); + return IPT_CONTINUE; } } @@ -143,13 +112,8 @@ ipt_tcpmss_target(struct sk_buff **pskb, newskb = skb_copy_expand(*pskb, skb_headroom(*pskb), TCPOLEN_MSS, GFP_ATOMIC); - if (!newskb) { - if (net_ratelimit()) - printk(KERN_ERR "ipt_tcpmss_target:" - " unable to allocate larger skb\n"); + if (!newskb) return NF_DROP; - } - kfree_skb(*pskb); *pskb = newskb; iph = (*pskb)->nh.iph; @@ -161,36 +125,29 @@ ipt_tcpmss_target(struct sk_buff **pskb, opt = (u_int8_t *)tcph + sizeof(struct tcphdr); memmove(opt + TCPOLEN_MSS, opt, tcplen - sizeof(struct tcphdr)); - tcph->check = cheat_check(htons(tcplen) ^ 0xFFFF, - htons(tcplen + TCPOLEN_MSS), tcph->check); - tcplen += TCPOLEN_MSS; - + tcph->check = nf_proto_csum_update(*pskb, + htons(tcplen) ^ 0xFFFF, + htons(tcplen + TCPOLEN_MSS), + tcph->check, 1); opt[0] = TCPOPT_MSS; opt[1] = TCPOLEN_MSS; opt[2] = (newmss & 0xff00) >> 8; opt[3] = (newmss & 0x00ff); - tcph->check = cheat_check(~0, *((u_int32_t *)opt), tcph->check); + tcph->check = nf_proto_csum_update(*pskb, ~0, *((u_int32_t *)opt), + tcph->check, 0); oldval = ((u_int16_t *)tcph)[6]; tcph->doff += TCPOLEN_MSS/4; - tcph->check = cheat_check(oldval ^ 0xFFFF, - ((u_int16_t *)tcph)[6], tcph->check); + tcph->check = nf_proto_csum_update(*pskb, + oldval ^ 0xFFFF, + ((u_int16_t *)tcph)[6], + tcph->check, 0); newtotlen = htons(ntohs(iph->tot_len) + TCPOLEN_MSS); - iph->check = cheat_check(iph->tot_len ^ 0xFFFF, - newtotlen, iph->check); + iph->check = nf_csum_update(iph->tot_len ^ 0xFFFF, + newtotlen, iph->check); iph->tot_len = newtotlen; - - DEBUGP(KERN_INFO "ipt_tcpmss_target: %u.%u.%u.%u:%hu" - "->%u.%u.%u.%u:%hu added TCP MSS option (%u)\n", - NIPQUAD((*pskb)->nh.iph->saddr), - ntohs(tcph->source), - NIPQUAD((*pskb)->nh.iph->daddr), - ntohs(tcph->dest), - newmss); - - retmodified: return IPT_CONTINUE; } @@ -200,9 +157,9 @@ static inline int find_syn_match(const struct ipt_entry_match *m) { const struct ipt_tcp *tcpinfo = (const struct ipt_tcp *)m->data; - if (strcmp(m->u.kernel.match->name, "tcp") == 0 - && (tcpinfo->flg_cmp & TH_SYN) - && !(tcpinfo->invflags & IPT_TCP_INV_FLAGS)) + if (strcmp(m->u.kernel.match->name, "tcp") == 0 && + tcpinfo->flg_cmp & TH_SYN && + !(tcpinfo->invflags & IPT_TCP_INV_FLAGS)) return 1; return 0; @@ -214,17 +171,17 @@ ipt_tcpmss_checkentry(const char *tablename, const void *e_void, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const struct ipt_tcpmss_info *tcpmssinfo = targinfo; const struct ipt_entry *e = e_void; - if((tcpmssinfo->mss == IPT_TCPMSS_CLAMP_PMTU) && - ((hook_mask & ~((1 << NF_IP_FORWARD) - | (1 << NF_IP_LOCAL_OUT) - | (1 << NF_IP_POST_ROUTING))) != 0)) { - printk("TCPMSS: path-MTU clamping only supported in FORWARD, OUTPUT and POSTROUTING hooks\n"); + if (tcpmssinfo->mss == IPT_TCPMSS_CLAMP_PMTU && + (hook_mask & ~((1 << NF_IP_FORWARD) | + (1 << NF_IP_LOCAL_OUT) | + (1 << NF_IP_POST_ROUTING))) != 0) { + printk("TCPMSS: path-MTU clamping only supported in " + "FORWARD, OUTPUT and POSTROUTING hooks\n"); return 0; } diff --git a/net/ipv4/netfilter/ipt_TOS.c b/net/ipv4/netfilter/ipt_TOS.c index 1c7a5ca..471a4c4 100644 --- a/net/ipv4/netfilter/ipt_TOS.c +++ b/net/ipv4/netfilter/ipt_TOS.c @@ -26,27 +26,20 @@ target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, - void *userinfo) + const void *targinfo) { const struct ipt_tos_target_info *tosinfo = targinfo; + struct iphdr *iph = (*pskb)->nh.iph; + u_int16_t oldtos; - if (((*pskb)->nh.iph->tos & IPTOS_TOS_MASK) != tosinfo->tos) { - u_int16_t diffs[2]; - + if ((iph->tos & IPTOS_TOS_MASK) != tosinfo->tos) { if (!skb_make_writable(pskb, sizeof(struct iphdr))) return NF_DROP; - - diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF; - (*pskb)->nh.iph->tos - = ((*pskb)->nh.iph->tos & IPTOS_PREC_MASK) - | tosinfo->tos; - diffs[1] = htons((*pskb)->nh.iph->tos); - (*pskb)->nh.iph->check - = csum_fold(csum_partial((char *)diffs, - sizeof(diffs), - (*pskb)->nh.iph->check - ^0xFFFF)); + iph = (*pskb)->nh.iph; + oldtos = iph->tos; + iph->tos = (iph->tos & IPTOS_PREC_MASK) | tosinfo->tos; + iph->check = nf_csum_update(oldtos ^ 0xFFFF, iph->tos, + iph->check); } return IPT_CONTINUE; } @@ -56,7 +49,6 @@ checkentry(const char *tablename, const void *e_void, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { const u_int8_t tos = ((struct ipt_tos_target_info *)targinfo)->tos; diff --git a/net/ipv4/netfilter/ipt_TTL.c b/net/ipv4/netfilter/ipt_TTL.c index f48892a..96e79cc 100644 --- a/net/ipv4/netfilter/ipt_TTL.c +++ b/net/ipv4/netfilter/ipt_TTL.c @@ -23,11 +23,10 @@ static unsigned int ipt_ttl_target(struct sk_buff **pskb, const struct net_device *in, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, void *userinfo) + const void *targinfo) { struct iphdr *iph; const struct ipt_TTL_info *info = targinfo; - u_int16_t diffs[2]; int new_ttl; if (!skb_make_writable(pskb, (*pskb)->len)) @@ -55,12 +54,10 @@ ipt_ttl_target(struct sk_buff **pskb, } if (new_ttl != iph->ttl) { - diffs[0] = htons(((unsigned)iph->ttl) << 8) ^ 0xFFFF; + iph->check = nf_csum_update(ntohs((iph->ttl << 8)) ^ 0xFFFF, + ntohs(new_ttl << 8), + iph->check); iph->ttl = new_ttl; - diffs[1] = htons(((unsigned)iph->ttl) << 8); - iph->check = csum_fold(csum_partial((char *)diffs, - sizeof(diffs), - iph->check^0xFFFF)); } return IPT_CONTINUE; @@ -70,7 +67,6 @@ static int ipt_ttl_checkentry(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hook_mask) { struct ipt_TTL_info *info = targinfo; diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c index d46fd67..2b104ea 100644 --- a/net/ipv4/netfilter/ipt_ULOG.c +++ b/net/ipv4/netfilter/ipt_ULOG.c @@ -308,7 +308,7 @@ static unsigned int ipt_ulog_target(struct sk_buff **pskb, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, - const void *targinfo, void *userinfo) + const void *targinfo) { struct ipt_ulog_info *loginfo = (struct ipt_ulog_info *) targinfo; @@ -346,7 +346,6 @@ static int ipt_ulog_checkentry(const char *tablename, const void *e, const struct xt_target *target, void *targinfo, - unsigned int targinfosize, unsigned int hookmask) { struct ipt_ulog_info *loginfo = (struct ipt_ulog_info *) targinfo; diff --git a/net/ipv4/netfilter/ipt_ah.c b/net/ipv4/netfilter/ipt_ah.c index 2927135..1798f86 100644 --- a/net/ipv4/netfilter/ipt_ah.c +++ b/net/ipv4/netfilter/ipt_ah.c @@ -74,7 +74,6 @@ checkentry(const char *tablename, const void *ip_void, const struct xt_match *match, void *matchinfo, - unsigned int matchinfosize, unsigned int hook_mask) { const struct ipt_ah *ahinfo = matchinfo; diff --git a/net/ipv4/netfilter/ipt_dscp.c b/net/ipv4/netfilter/ipt_dscp.c deleted file mode 100644 index 4717759..0000000 --- a/net/ipv4/netfilter/ipt_dscp.c +++ /dev/null @@ -1,54 +0,0 @@ -/* IP tables module for matching the value of the IPv4 DSCP field - * - * ipt_dscp.c,v 1.3 2002/08/05 19:00:21 laforge Exp - * - * (C) 2002 by Harald Welte <laforge@netfilter.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/module.h> -#include <linux/skbuff.h> - -#include <linux/netfilter_ipv4/ipt_dscp.h> -#include <linux/netfilter_ipv4/ip_tables.h> - -MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); -MODULE_DESCRIPTION("iptables DSCP matching module"); -MODULE_LICENSE("GPL"); - -static int match(const struct sk_buff *skb, - const struct net_device *in, const struct net_device *out, - const struct xt_match *match, const void *matchinfo, - int offset, unsigned int protoff, int *hotdrop) -{ - const struct ipt_dscp_info *info = matchinfo; - const struct iphdr *iph = skb->nh.iph; - - u_int8_t sh_dscp = ((info->dscp << IPT_DSCP_SHIFT) & IPT_DSCP_MASK); - - return ((iph->tos&IPT_DSCP_MASK) == sh_dscp) ^ info->invert; -} - -static struct ipt_match dscp_match = { - .name = "dscp", - .match = match, - .matchsize = sizeof(struct ipt_dscp_info), - .me = THIS_MODULE, -}; - -static int __init ipt_dscp_init(void) -{ - return ipt_register_match(&dscp_match); -} - -static void __exit ipt_dscp_fini(void) -{ - ipt_unregister_match(&dscp_match); - -} - -module_init(ipt_dscp_init); -module_exit(ipt_dscp_fini); diff --git a/net/ipv4/netfilter/ipt_ecn.c b/net/ipv4/netfilter/ipt_ecn.c index b282504..dafbdec 100644 --- a/net/ipv4/netfilter/ipt_ecn.c +++ b/net/ipv4/netfilter/ipt_ecn.c @@ -88,8 +88,7 @@ static int match(const struct sk_buff *skb, static int checkentry(const char *tablename, const void *ip_void, const struct xt_match *match, - void *matchinfo, unsigned int matchsize, - unsigned int hook_mask) + void *matchinfo, unsigned int hook_mask) { const struct ipt_ecn_info *info = matchinfo; const struct ipt_ip *ip = ip_void; diff --git a/net/ipv4/netfilter/ipt_hashlimit.c b/net/ipv4/netfilter/ipt_hashlimit.c index 3bd2368..4f73a61 100644 --- a/net/ipv4/netfilter/ipt_hashlimit.c +++ b/net/ipv4/netfilter/ipt_hashlimit.c @@ -478,7 +478,6 @@ hashlimit_checkentry(const char *tablename, const void *inf, const struct xt_match *match, void *matchinfo, - unsigned int matchsize, unsigned int hook_mask) { struct ipt_hashlimit_info *r = matchinfo; @@ -529,18 +528,46 @@ hashlimit_checkentry(const char *tablename, } static void -hashlimit_destroy(const struct xt_match *match, void *matchinfo, - unsigned int matchsize) +hashlimit_destroy(const struct xt_match *match, void *matchinfo) { struct ipt_hashlimit_info *r = matchinfo; htable_put(r->hinfo); } +#ifdef CONFIG_COMPAT +struct compat_ipt_hashlimit_info { + char name[IFNAMSIZ]; + struct hashlimit_cfg cfg; + compat_uptr_t hinfo; + compat_uptr_t master; +}; + +static void compat_from_user(void *dst, void *src) +{ + int off = offsetof(struct compat_ipt_hashlimit_info, hinfo); + + memcpy(dst, src, off); + memset(dst + off, 0, sizeof(struct compat_ipt_hashlimit_info) - off); +} + +static int compat_to_user(void __user *dst, void *src) +{ + int off = offsetof(struct compat_ipt_hashlimit_info, hinfo); + + return copy_to_user(dst, src, off) ? -EFAULT : 0; +} +#endif + static struct ipt_match ipt_hashlimit = { .name = "hashlimit", .match = hashlimit_match, .matchsize = sizeof(struct ipt_hashlimit_info), +#ifdef CONFIG_COMPAT + .compatsize = sizeof(struct compat_ipt_hashlimit_info), + .compat_from_user = compat_from_user, + .compat_to_user = compat_to_user, +#endif .checkentry = hashlimit_checkentry, .destroy = hashlimit_destroy, .me = THIS_MODULE diff --git a/net/ipv4/netfilter/ipt_owner.c b/net/ipv4/netfilter/ipt_owner.c index 5ac6ac0..78c336f1 100644 --- a/net/ipv4/netfilter/ipt_owner.c +++ b/net/ipv4/netfilter/ipt_owner.c @@ -56,7 +56,6 @@ checkentry(const char *tablename, const void *ip, const struct xt_match *match, void *matchinfo, - unsigned int matchsize, unsigned int hook_mask) { const struct ipt_owner_info *info = matchinfo; diff --git a/net/ipv4/netfilter/ipt_recent.c b/net/ipv4/netfilter/ipt_recent.c index 61a2139..32ae8d7 100644 --- a/net/ipv4/netfilter/ipt_recent.c +++ b/net/ipv4/netfilter/ipt_recent.c @@ -35,14 +35,20 @@ static unsigned int ip_list_tot = 100; static unsigned int ip_pkt_list_tot = 20; static unsigned int ip_list_hash_size = 0; static unsigned int ip_list_perms = 0644; +static unsigned int ip_list_uid = 0; +static unsigned int ip_list_gid = 0; module_param(ip_list_tot, uint, 0400); module_param(ip_pkt_list_tot, uint, 0400); module_param(ip_list_hash_size, uint, 0400); module_param(ip_list_perms, uint, 0400); +module_param(ip_list_uid, uint, 0400); +module_param(ip_list_gid, uint, 0400); MODULE_PARM_DESC(ip_list_tot, "number of IPs to remember per list"); MODULE_PARM_DESC(ip_pkt_list_tot, "number of packets per IP to remember (max. 255)"); MODULE_PARM_DESC(ip_list_hash_size, "size of hash table used to look up IPs"); MODULE_PARM_DESC(ip_list_perms, "permissions on /proc/net/ipt_recent/* files"); +MODULE_PARM_DESC(ip_list_uid,"owner of /proc/net/ipt_recent/* files"); +MODULE_PARM_DESC(ip_list_gid,"owning group of /proc/net/ipt_recent/* files"); struct recent_entry { @@ -232,7 +238,7 @@ out: static int ipt_recent_checkentry(const char *tablename, const void *ip, const struct xt_match *match, void *matchinfo, - unsigned int matchsize, unsigned int hook_mask) + unsigned int hook_mask) { const struct ipt_recent_info *info = matchinfo; struct recent_table *t; @@ -274,6 +280,8 @@ ipt_recent_checkentry(const char *tablename, const void *ip, goto out; } t->proc->proc_fops = &recent_fops; + t->proc->uid = ip_list_uid; + t->proc->gid = ip_list_gid; t->proc->data = t; #endif spin_lock_bh(&recent_lock); @@ -286,8 +294,7 @@ out: } static void -ipt_recent_destroy(const struct xt_match *match, void *matchinfo, - unsigned int matchsize) +ipt_recent_destroy(const struct xt_match *match, void *matchinfo) { const struct ipt_recent_info *info = matchinfo; struct recent_table *t; diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c index 7f41748..e2e7dd8 100644 --- a/net/ipv4/netfilter/iptable_filter.c +++ b/net/ipv4/netfilter/iptable_filter.c @@ -90,7 +90,7 @@ ipt_hook(unsigned int hook, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(pskb, hook, in, out, &packet_filter, NULL); + return ipt_do_table(pskb, hook, in, out, &packet_filter); } static unsigned int @@ -108,7 +108,7 @@ ipt_local_out_hook(unsigned int hook, return NF_ACCEPT; } - return ipt_do_table(pskb, hook, in, out, &packet_filter, NULL); + return ipt_do_table(pskb, hook, in, out, &packet_filter); } static struct nf_hook_ops ipt_ops[] = { diff --git a/net/ipv4/netfilter/iptable_mangle.c b/net/ipv4/netfilter/iptable_mangle.c index 4e7998b..79336cb 100644 --- a/net/ipv4/netfilter/iptable_mangle.c +++ b/net/ipv4/netfilter/iptable_mangle.c @@ -119,7 +119,7 @@ ipt_route_hook(unsigned int hook, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(pskb, hook, in, out, &packet_mangler, NULL); + return ipt_do_table(pskb, hook, in, out, &packet_mangler); } static unsigned int @@ -148,7 +148,7 @@ ipt_local_hook(unsigned int hook, daddr = (*pskb)->nh.iph->daddr; tos = (*pskb)->nh.iph->tos; - ret = ipt_do_table(pskb, hook, in, out, &packet_mangler, NULL); + ret = ipt_do_table(pskb, hook, in, out, &packet_mangler); /* Reroute for ANY change. */ if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE && ((*pskb)->nh.iph->saddr != saddr diff --git a/net/ipv4/netfilter/iptable_raw.c b/net/ipv4/netfilter/iptable_raw.c index 7912cce..bcbeb4a 100644 --- a/net/ipv4/netfilter/iptable_raw.c +++ b/net/ipv4/netfilter/iptable_raw.c @@ -95,7 +95,7 @@ ipt_hook(unsigned int hook, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(pskb, hook, in, out, &packet_raw, NULL); + return ipt_do_table(pskb, hook, in, out, &packet_raw); } /* 'raw' is the very first table. */ diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c index 663a73e..790f00d 100644 --- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c +++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c @@ -25,7 +25,7 @@ #include <net/netfilter/nf_conntrack_protocol.h> #include <net/netfilter/nf_conntrack_core.h> -unsigned long nf_ct_icmp_timeout = 30*HZ; +unsigned long nf_ct_icmp_timeout __read_mostly = 30*HZ; #if 0 #define DEBUGP printk |