}
static unsigned int
-ip6t_error(struct sk_buff **pskb,
+ip6t_error(struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
return (struct ip6t_entry *)(base + offset);
}
+/* All zeroes == unconditional rule. */
+static inline int
+unconditional(const struct ip6t_ip6 *ipv6)
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof(*ipv6); i++)
+ if (((char *)ipv6)[i])
+ break;
+
+ return (i == sizeof(*ipv6));
+}
+
+#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
+ defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
+/* This cries for unification! */
+static const char *hooknames[] = {
+ [NF_INET_PRE_ROUTING] = "PREROUTING",
+ [NF_INET_LOCAL_IN] = "INPUT",
+ [NF_INET_FORWARD] = "FORWARD",
+ [NF_INET_LOCAL_OUT] = "OUTPUT",
+ [NF_INET_POST_ROUTING] = "POSTROUTING",
+};
+
+enum nf_ip_trace_comments {
+ NF_IP6_TRACE_COMMENT_RULE,
+ NF_IP6_TRACE_COMMENT_RETURN,
+ NF_IP6_TRACE_COMMENT_POLICY,
+};
+
+static const char *comments[] = {
+ [NF_IP6_TRACE_COMMENT_RULE] = "rule",
+ [NF_IP6_TRACE_COMMENT_RETURN] = "return",
+ [NF_IP6_TRACE_COMMENT_POLICY] = "policy",
+};
+
+static struct nf_loginfo trace_loginfo = {
+ .type = NF_LOG_TYPE_LOG,
+ .u = {
+ .log = {
+ .level = 4,
+ .logflags = NF_LOG_MASK,
+ },
+ },
+};
+
+static inline int
+get_chainname_rulenum(struct ip6t_entry *s, struct ip6t_entry *e,
+ char *hookname, char **chainname,
+ char **comment, unsigned int *rulenum)
+{
+ struct ip6t_standard_target *t = (void *)ip6t_get_target(s);
+
+ if (strcmp(t->target.u.kernel.target->name, IP6T_ERROR_TARGET) == 0) {
+ /* Head of user chain: ERROR target with chainname */
+ *chainname = t->target.data;
+ (*rulenum) = 0;
+ } else if (s == e) {
+ (*rulenum)++;
+
+ if (s->target_offset == sizeof(struct ip6t_entry)
+ && strcmp(t->target.u.kernel.target->name,
+ IP6T_STANDARD_TARGET) == 0
+ && t->verdict < 0
+ && unconditional(&s->ipv6)) {
+ /* Tail of chains: STANDARD target (return/policy) */
+ *comment = *chainname == hookname
+ ? (char *)comments[NF_IP6_TRACE_COMMENT_POLICY]
+ : (char *)comments[NF_IP6_TRACE_COMMENT_RETURN];
+ }
+ return 1;
+ } else
+ (*rulenum)++;
+
+ return 0;
+}
+
+static void trace_packet(struct sk_buff *skb,
+ unsigned int hook,
+ const struct net_device *in,
+ const struct net_device *out,
+ char *tablename,
+ struct xt_table_info *private,
+ struct ip6t_entry *e)
+{
+ void *table_base;
+ struct ip6t_entry *root;
+ char *hookname, *chainname, *comment;
+ unsigned int rulenum = 0;
+
+ table_base = (void *)private->entries[smp_processor_id()];
+ root = get_entry(table_base, private->hook_entry[hook]);
+
+ hookname = chainname = (char *)hooknames[hook];
+ comment = (char *)comments[NF_IP6_TRACE_COMMENT_RULE];
+
+ IP6T_ENTRY_ITERATE(root,
+ private->size - private->hook_entry[hook],
+ get_chainname_rulenum,
+ e, hookname, &chainname, &comment, &rulenum);
+
+ nf_log_packet(AF_INET6, hook, skb, in, out, &trace_loginfo,
+ "TRACE: %s:%s:%s:%u ",
+ tablename, chainname, comment, rulenum);
+}
+#endif
+
/* Returns one of the generic firewall policies, like NF_ACCEPT. */
unsigned int
-ip6t_do_table(struct sk_buff **pskb,
+ip6t_do_table(struct sk_buff *skb,
unsigned int hook,
const struct net_device *in,
const struct net_device *out,
do {
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
- if (ip6_packet_match(*pskb, indev, outdev, &e->ipv6,
+ if (ip6_packet_match(skb, indev, outdev, &e->ipv6,
&protoff, &offset, &hotdrop)) {
struct ip6t_entry_target *t;
if (IP6T_MATCH_ITERATE(e, do_match,
- *pskb, in, out,
+ skb, in, out,
offset, protoff, &hotdrop) != 0)
goto no_match;
ADD_COUNTER(e->counters,
- ntohs(ipv6_hdr(*pskb)->payload_len)
+ ntohs(ipv6_hdr(skb)->payload_len)
+ IPV6_HDR_LEN,
1);
t = ip6t_get_target(e);
IP_NF_ASSERT(t->u.kernel.target);
+
+#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
+ defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
+ /* The packet is traced: log it */
+ if (unlikely(skb->nf_trace))
+ trace_packet(skb, hook, in, out,
+ table->name, private, e);
+#endif
/* Standard target? */
if (!t->u.kernel.target->target) {
int v;
((struct ip6t_entry *)table_base)->comefrom
= 0xeeeeeeec;
#endif
- verdict = t->u.kernel.target->target(pskb,
+ verdict = t->u.kernel.target->target(skb,
in, out,
hook,
t->u.kernel.target,
#endif
}
-/* All zeroes == unconditional rule. */
-static inline int
-unconditional(const struct ip6t_ip6 *ipv6)
-{
- unsigned int i;
-
- for (i = 0; i < sizeof(*ipv6); i++)
- if (((char *)ipv6)[i])
- break;
-
- return (i == sizeof(*ipv6));
-}
-
/* Figures out from what hook each rule can be called: returns 0 if
there are loops. Puts hook bitmask in comefrom. */
static int
/* No recursion; use packet counter to save back ptrs (reset
to 0 as we leave), and comefrom to save source hook bitmask */
- for (hook = 0; hook < NF_IP6_NUMHOOKS; hook++) {
+ for (hook = 0; hook < NF_INET_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
struct ip6t_entry *e
= (struct ip6t_entry *)(entry0 + pos);
struct ip6t_standard_target *t
= (void *)ip6t_get_target(e);
- if (e->comefrom & (1 << NF_IP6_NUMHOOKS)) {
+ if (e->comefrom & (1 << NF_INET_NUMHOOKS)) {
printk("iptables: loop hook %u pos %u %08X.\n",
hook, pos, e->comefrom);
return 0;
}
e->comefrom
- |= ((1 << hook) | (1 << NF_IP6_NUMHOOKS));
+ |= ((1 << hook) | (1 << NF_INET_NUMHOOKS));
/* Unconditional return/END. */
if ((e->target_offset == sizeof(struct ip6t_entry)
/* Return: backtrack through the last
big jump. */
do {
- e->comefrom ^= (1<<NF_IP6_NUMHOOKS);
+ e->comefrom ^= (1<<NF_INET_NUMHOOKS);
#ifdef DEBUG_IP_FIREWALL_USER
if (e->comefrom
- & (1 << NF_IP6_NUMHOOKS)) {
+ & (1 << NF_INET_NUMHOOKS)) {
duprintf("Back unset "
"on hook %u "
"rule %u\n",
}
/* Check hooks & underflows */
- for (h = 0; h < NF_IP6_NUMHOOKS; h++) {
+ for (h = 0; h < NF_INET_NUMHOOKS; h++) {
if ((unsigned char *)e - base == hook_entries[h])
newinfo->hook_entry[h] = hook_entries[h];
if ((unsigned char *)e - base == underflows[h])
newinfo->number = number;
/* Init all hooks to impossible value. */
- for (i = 0; i < NF_IP6_NUMHOOKS; i++) {
+ for (i = 0; i < NF_INET_NUMHOOKS; i++) {
newinfo->hook_entry[i] = 0xFFFFFFFF;
newinfo->underflow[i] = 0xFFFFFFFF;
}
}
/* Check hooks all assigned */
- for (i = 0; i < NF_IP6_NUMHOOKS; i++) {
+ for (i = 0; i < NF_INET_NUMHOOKS; i++) {
/* Only hooks which are valid */
if (!(valid_hooks & (1 << i)))
continue;
}
/* The built-in targets: standard (NULL) and error. */
-static struct xt_target ip6t_standard_target = {
+static struct xt_target ip6t_standard_target __read_mostly = {
.name = IP6T_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = AF_INET6,
};
-static struct xt_target ip6t_error_target = {
+static struct xt_target ip6t_error_target __read_mostly = {
.name = IP6T_ERROR_TARGET,
.target = ip6t_error,
.targetsize = IP6T_FUNCTION_MAXNAMELEN,
.get_optmin = IP6T_BASE_CTL,
.get_optmax = IP6T_SO_GET_MAX+1,
.get = do_ip6t_get_ctl,
+ .owner = THIS_MODULE,
};
-static struct xt_match icmp6_matchstruct = {
+static struct xt_match icmp6_matchstruct __read_mostly = {
.name = "icmp6",
.match = &icmp6_match,
.matchsize = sizeof(struct ip6t_icmp),
if (ret < 0)
goto err5;
- printk("ip6_tables: (C) 2000-2006 Netfilter Core Team\n");
+ printk(KERN_INFO "ip6_tables: (C) 2000-2006 Netfilter Core Team\n");
return 0;
err5:
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff