#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/skbuff.h>
+#include <linux/if_arp.h>
#include <linux/ip.h>
#include <linux/spinlock.h>
#include <linux/icmpv6.h>
MODULE_DESCRIPTION("IP6 tables LOG target module");
MODULE_LICENSE("GPL");
-static unsigned int nflog = 1;
-module_param(nflog, int, 0400);
-MODULE_PARM_DESC(nflog, "register as internal netfilter logging module");
-
struct in_device;
#include <net/route.h>
#include <linux/netfilter_ipv6/ip6t_LOG.h>
static DEFINE_SPINLOCK(log_lock);
/* One level of recursion won't kill us */
-static void dump_packet(const struct ip6t_log_info *info,
+static void dump_packet(const struct nf_loginfo *info,
const struct sk_buff *skb, unsigned int ip6hoff,
int recurse)
{
struct ipv6hdr _ip6h, *ih;
unsigned int ptr;
unsigned int hdrlen = 0;
+ unsigned int logflags;
+
+ if (info->type == NF_LOG_TYPE_LOG)
+ logflags = info->u.log.logflags;
+ else
+ logflags = NF_LOG_MASK;
ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h);
if (ih == NULL) {
return;
}
- /* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000" */
- printk("SRC=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", NIP6(ih->saddr));
- printk("DST=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", NIP6(ih->daddr));
+ /* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000 " */
+ printk("SRC=" NIP6_FMT " DST=" NIP6_FMT " ", NIP6(ih->saddr), NIP6(ih->daddr));
/* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
printk("LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
}
/* Max length: 48 "OPT (...) " */
- if (info->logflags & IP6T_LOG_IPOPT)
+ if (logflags & IP6T_LOG_IPOPT)
printk("OPT ( ");
switch (currenthdr) {
case IPPROTO_ROUTING:
case IPPROTO_HOPOPTS:
if (fragment) {
- if (info->logflags & IP6T_LOG_IPOPT)
+ if (logflags & IP6T_LOG_IPOPT)
printk(")");
return;
}
break;
/* Max Length */
case IPPROTO_AH:
- if (info->logflags & IP6T_LOG_IPOPT) {
+ if (logflags & IP6T_LOG_IPOPT) {
struct ip_auth_hdr _ahdr, *ah;
/* Max length: 3 "AH " */
hdrlen = (hp->hdrlen+2)<<2;
break;
case IPPROTO_ESP:
- if (info->logflags & IP6T_LOG_IPOPT) {
+ if (logflags & IP6T_LOG_IPOPT) {
struct ip_esp_hdr _esph, *eh;
/* Max length: 4 "ESP " */
printk("Unknown Ext Hdr %u", currenthdr);
return;
}
- if (info->logflags & IP6T_LOG_IPOPT)
+ if (logflags & IP6T_LOG_IPOPT)
printk(") ");
currenthdr = hp->nexthdr;
printk("SPT=%u DPT=%u ",
ntohs(th->source), ntohs(th->dest));
/* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
- if (info->logflags & IP6T_LOG_TCPSEQ)
+ if (logflags & IP6T_LOG_TCPSEQ)
printk("SEQ=%u ACK=%u ",
ntohl(th->seq), ntohl(th->ack_seq));
/* Max length: 13 "WINDOW=65535 " */
/* Max length: 11 "URGP=65535 " */
printk("URGP=%u ", ntohs(th->urg_ptr));
- if ((info->logflags & IP6T_LOG_TCPOPT)
+ if ((logflags & IP6T_LOG_TCPOPT)
&& th->doff * 4 > sizeof(struct tcphdr)) {
u_int8_t _opt[60 - sizeof(struct tcphdr)], *op;
unsigned int i;
}
/* Max length: 15 "UID=4294967295 " */
- if ((info->logflags & IP6T_LOG_UID) && recurse && skb->sk) {
+ if ((logflags & IP6T_LOG_UID) && recurse && skb->sk) {
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->sk->sk_socket && skb->sk->sk_socket->file)
printk("UID=%u ", skb->sk->sk_socket->file->f_uid);
}
}
+static struct nf_loginfo default_loginfo = {
+ .type = NF_LOG_TYPE_LOG,
+ .u = {
+ .log = {
+ .level = 0,
+ .logflags = NF_LOG_MASK,
+ },
+ },
+};
+
static void
-ip6t_log_packet(unsigned int hooknum,
+ip6t_log_packet(unsigned int pf,
+ unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
- const struct ip6t_log_info *loginfo,
- const char *level_string,
+ const struct nf_loginfo *loginfo,
const char *prefix)
{
- struct ipv6hdr *ipv6h = skb->nh.ipv6h;
+ if (!loginfo)
+ loginfo = &default_loginfo;
spin_lock_bh(&log_lock);
- printk(level_string);
- printk("%sIN=%s OUT=%s ",
- prefix == NULL ? loginfo->prefix : prefix,
+ printk("<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
+ prefix,
in ? in->name : "",
out ? out->name : "");
if (in && !out) {
+ unsigned int len;
/* MAC logging for input chain only. */
printk("MAC=");
- if (skb->dev && skb->dev->hard_header_len && skb->mac.raw != (void*)ipv6h) {
- if (skb->dev->type != ARPHRD_SIT){
- int i;
- unsigned char *p = skb->mac.raw;
- for (i = 0; i < skb->dev->hard_header_len; i++,p++)
- printk("%02x%c", *p,
- i==skb->dev->hard_header_len - 1
- ? ' ':':');
- } else {
- int i;
- unsigned char *p = skb->mac.raw;
- if ( p - (ETH_ALEN*2+2) > skb->head ){
- p -= (ETH_ALEN+2);
- for (i = 0; i < (ETH_ALEN); i++,p++)
- printk("%02x%s", *p,
- i == ETH_ALEN-1 ? "->" : ":");
- p -= (ETH_ALEN*2);
- for (i = 0; i < (ETH_ALEN); i++,p++)
- printk("%02x%c", *p,
- i == ETH_ALEN-1 ? ' ' : ':');
- }
-
- if ((skb->dev->addr_len == 4) &&
- skb->dev->hard_header_len > 20){
- printk("TUNNEL=");
- p = skb->mac.raw + 12;
- for (i = 0; i < 4; i++,p++)
- printk("%3d%s", *p,
- i == 3 ? "->" : ".");
- for (i = 0; i < 4; i++,p++)
- printk("%3d%c", *p,
- i == 3 ? ' ' : '.');
- }
+ if (skb->dev && (len = skb->dev->hard_header_len) &&
+ skb->mac.raw != skb->nh.raw) {
+ unsigned char *p = skb->mac.raw;
+ int i;
+
+ if (skb->dev->type == ARPHRD_SIT &&
+ (p -= ETH_HLEN) < skb->head)
+ p = NULL;
+
+ if (p != NULL) {
+ for (i = 0; i < len; i++)
+ printk("%02x%s", p[i],
+ i == len - 1 ? "" : ":");
+ }
+ printk(" ");
+
+ if (skb->dev->type == ARPHRD_SIT) {
+ struct iphdr *iph = (struct iphdr *)skb->mac.raw;
+ printk("TUNNEL=%u.%u.%u.%u->%u.%u.%u.%u ",
+ NIPQUAD(iph->saddr),
+ NIPQUAD(iph->daddr));
}
} else
printk(" ");
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 ip6t_log_info *loginfo = targinfo;
- char level_string[4] = "< >";
+ struct nf_loginfo li;
+
+ li.type = NF_LOG_TYPE_LOG;
+ li.u.log.level = loginfo->level;
+ li.u.log.logflags = loginfo->logflags;
- level_string[1] = '0' + (loginfo->level % 8);
- ip6t_log_packet(hooknum, *pskb, in, out, loginfo, level_string, NULL);
+ if (loginfo->logflags & IP6T_LOG_NFLOG)
+ nf_log_packet(PF_INET6, hooknum, *pskb, in, out, &li,
+ "%s", loginfo->prefix);
+ else
+ ip6t_log_packet(PF_INET6, hooknum, *pskb, in, out, &li,
+ loginfo->prefix);
return IP6T_CONTINUE;
}
-static void
-ip6t_logfn(unsigned int hooknum,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const char *prefix)
-{
- struct ip6t_log_info loginfo = {
- .level = 0,
- .logflags = IP6T_LOG_MASK,
- .prefix = ""
- };
-
- ip6t_log_packet(hooknum, skb, in, out, &loginfo, KERN_WARNING, prefix);
-}
static int ip6t_log_checkentry(const char *tablename,
- const struct ip6t_entry *e,
+ const void *entry,
+ const struct xt_target *target,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask)
{
const struct ip6t_log_info *loginfo = targinfo;
- if (targinfosize != IP6T_ALIGN(sizeof(struct ip6t_log_info))) {
- DEBUGP("LOG: targinfosize %u != %u\n",
- targinfosize, IP6T_ALIGN(sizeof(struct ip6t_log_info)));
- return 0;
- }
-
if (loginfo->level >= 8) {
DEBUGP("LOG: level %u >= 8\n", loginfo->level);
return 0;
}
-
if (loginfo->prefix[sizeof(loginfo->prefix)-1] != '\0') {
DEBUGP("LOG: prefix term %i\n",
loginfo->prefix[sizeof(loginfo->prefix)-1]);
return 0;
}
-
return 1;
}
static struct ip6t_target ip6t_log_reg = {
.name = "LOG",
.target = ip6t_log_target,
+ .targetsize = sizeof(struct ip6t_log_info),
.checkentry = ip6t_log_checkentry,
.me = THIS_MODULE,
};
-static int __init init(void)
+static struct nf_logger ip6t_logger = {
+ .name = "ip6t_LOG",
+ .logfn = &ip6t_log_packet,
+ .me = THIS_MODULE,
+};
+
+static int __init ip6t_log_init(void)
{
if (ip6t_register_target(&ip6t_log_reg))
return -EINVAL;
- if (nflog)
- nf_log_register(PF_INET6, &ip6t_logfn);
+ if (nf_log_register(PF_INET6, &ip6t_logger) < 0) {
+ printk(KERN_WARNING "ip6t_LOG: not logging via system console "
+ "since somebody else already registered for PF_INET6\n");
+ /* we cannot make module load fail here, since otherwise
+ * ip6tables userspace would abort */
+ }
return 0;
}
-static void __exit fini(void)
+static void __exit ip6t_log_fini(void)
{
- if (nflog)
- nf_log_unregister(PF_INET6, &ip6t_logfn);
+ nf_log_unregister_logger(&ip6t_logger);
ip6t_unregister_target(&ip6t_log_reg);
}
-module_init(init);
-module_exit(fini);
+module_init(ip6t_log_init);
+module_exit(ip6t_log_fini);
git://git.onelab.eu / linux-2.6.git / blobdiff