Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 509 insertions, 0 deletions

diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
new file mode 100644
index 00000000000..bfc3d0185d1
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -0,0 +1,509 @@
+/*
+ * This is a module which is used for logging packets.
+ */
+
+/* (C) 2001 Jan Rekorajski <baggins@pld.org.pl>
+ * (C) 2002-2004 Netfilter Core Team <coreteam@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/moduleparam.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/spinlock.h>
+#include <linux/icmpv6.h>
+#include <net/udp.h>
+#include <net/tcp.h>
+#include <net/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+MODULE_AUTHOR("Jan Rekorajski <baggins@pld.org.pl>");
+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>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+/* Use lock to serialize, so printks don't overlap */
+static DEFINE_SPINLOCK(log_lock);
+
+/* One level of recursion won't kill us */
+static void dump_packet(const struct ip6t_log_info *info,
+			const struct sk_buff *skb, unsigned int ip6hoff,
+			int recurse)
+{
+	u_int8_t currenthdr;
+	int fragment;
+	struct ipv6hdr _ip6h, *ih;
+	unsigned int ptr;
+	unsigned int hdrlen = 0;
+
+	ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h);
+	if (ih == NULL) {
+		printk("TRUNCATED");
+		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: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
+	printk("LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
+	       ntohs(ih->payload_len) + sizeof(struct ipv6hdr),
+	       (ntohl(*(u_int32_t *)ih) & 0x0ff00000) >> 20,
+	       ih->hop_limit,
+	       (ntohl(*(u_int32_t *)ih) & 0x000fffff));
+
+	fragment = 0;
+	ptr = ip6hoff + sizeof(struct ipv6hdr);
+	currenthdr = ih->nexthdr;
+	while (currenthdr != NEXTHDR_NONE && ip6t_ext_hdr(currenthdr)) {
+		struct ipv6_opt_hdr _hdr, *hp;
+
+		hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
+		if (hp == NULL) {
+			printk("TRUNCATED");
+			return;
+		}
+
+		/* Max length: 48 "OPT (...) " */
+		if (info->logflags & IP6T_LOG_IPOPT)
+			printk("OPT ( ");
+
+		switch (currenthdr) {
+		case IPPROTO_FRAGMENT: {
+			struct frag_hdr _fhdr, *fh;
+
+			printk("FRAG:");
+			fh = skb_header_pointer(skb, ptr, sizeof(_fhdr),
+						&_fhdr);
+			if (fh == NULL) {
+				printk("TRUNCATED ");
+				return;
+			}
+
+			/* Max length: 6 "65535 " */
+			printk("%u ", ntohs(fh->frag_off) & 0xFFF8);
+
+			/* Max length: 11 "INCOMPLETE " */
+			if (fh->frag_off & htons(0x0001))
+				printk("INCOMPLETE ");
+
+			printk("ID:%08x ", ntohl(fh->identification));
+
+			if (ntohs(fh->frag_off) & 0xFFF8)
+				fragment = 1;
+
+			hdrlen = 8;
+
+			break;
+		}
+		case IPPROTO_DSTOPTS:
+		case IPPROTO_ROUTING:
+		case IPPROTO_HOPOPTS:
+			if (fragment) {
+				if (info->logflags & IP6T_LOG_IPOPT)
+					printk(")");
+				return;
+			}
+			hdrlen = ipv6_optlen(hp);
+			break;
+		/* Max Length */
+		case IPPROTO_AH:
+			if (info->logflags & IP6T_LOG_IPOPT) {
+				struct ip_auth_hdr _ahdr, *ah;
+
+				/* Max length: 3 "AH " */
+				printk("AH ");
+
+				if (fragment) {
+					printk(")");
+					return;
+				}
+
+				ah = skb_header_pointer(skb, ptr, sizeof(_ahdr),
+							&_ahdr);
+				if (ah == NULL) {
+					/*
+					 * Max length: 26 "INCOMPLETE [65535 	
+					 *  bytes] )"
+					 */
+					printk("INCOMPLETE [%u bytes] )",
+					       skb->len - ptr);
+					return;
+				}
+
+				/* Length: 15 "SPI=0xF1234567 */
+				printk("SPI=0x%x ", ntohl(ah->spi));
+
+			}
+
+			hdrlen = (hp->hdrlen+2)<<2;
+			break;
+		case IPPROTO_ESP:
+			if (info->logflags & IP6T_LOG_IPOPT) {
+				struct ip_esp_hdr _esph, *eh;
+
+				/* Max length: 4 "ESP " */
+				printk("ESP ");
+
+				if (fragment) {
+					printk(")");
+					return;
+				}
+
+				/*
+				 * Max length: 26 "INCOMPLETE [65535 bytes] )"
+				 */
+				eh = skb_header_pointer(skb, ptr, sizeof(_esph),
+							&_esph);
+				if (eh == NULL) {
+					printk("INCOMPLETE [%u bytes] )",
+					       skb->len - ptr);
+					return;
+				}
+
+				/* Length: 16 "SPI=0xF1234567 )" */
+				printk("SPI=0x%x )", ntohl(eh->spi) );
+
+			}
+			return;
+		default:
+			/* Max length: 20 "Unknown Ext Hdr 255" */
+			printk("Unknown Ext Hdr %u", currenthdr);
+			return;
+		}
+		if (info->logflags & IP6T_LOG_IPOPT)
+			printk(") ");
+
+		currenthdr = hp->nexthdr;
+		ptr += hdrlen;
+	}
+
+	switch (currenthdr) {
+	case IPPROTO_TCP: {
+		struct tcphdr _tcph, *th;
+
+		/* Max length: 10 "PROTO=TCP " */
+		printk("PROTO=TCP ");
+
+		if (fragment)
+			break;
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		th = skb_header_pointer(skb, ptr, sizeof(_tcph), &_tcph);
+		if (th == NULL) {
+			printk("INCOMPLETE [%u bytes] ", skb->len - ptr);
+			return;
+		}
+
+		/* Max length: 20 "SPT=65535 DPT=65535 " */
+		printk("SPT=%u DPT=%u ",
+		       ntohs(th->source), ntohs(th->dest));
+		/* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
+		if (info->logflags & IP6T_LOG_TCPSEQ)
+			printk("SEQ=%u ACK=%u ",
+			       ntohl(th->seq), ntohl(th->ack_seq));
+		/* Max length: 13 "WINDOW=65535 " */
+		printk("WINDOW=%u ", ntohs(th->window));
+		/* Max length: 9 "RES=0x3C " */
+		printk("RES=0x%02x ", (u_int8_t)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22));
+		/* Max length: 32 "CWR ECE URG ACK PSH RST SYN FIN " */
+		if (th->cwr)
+			printk("CWR ");
+		if (th->ece)
+			printk("ECE ");
+		if (th->urg)
+			printk("URG ");
+		if (th->ack)
+			printk("ACK ");
+		if (th->psh)
+			printk("PSH ");
+		if (th->rst)
+			printk("RST ");
+		if (th->syn)
+			printk("SYN ");
+		if (th->fin)
+			printk("FIN ");
+		/* Max length: 11 "URGP=65535 " */
+		printk("URGP=%u ", ntohs(th->urg_ptr));
+
+		if ((info->logflags & IP6T_LOG_TCPOPT)
+		    && th->doff * 4 > sizeof(struct tcphdr)) {
+			u_int8_t _opt[60 - sizeof(struct tcphdr)], *op;
+			unsigned int i;
+			unsigned int optsize = th->doff * 4
+					       - sizeof(struct tcphdr);
+
+			op = skb_header_pointer(skb,
+						ptr + sizeof(struct tcphdr),
+						optsize, _opt);
+			if (op == NULL) {
+				printk("OPT (TRUNCATED)");
+				return;
+			}
+
+			/* Max length: 127 "OPT (" 15*4*2chars ") " */
+			printk("OPT (");
+			for (i =0; i < optsize; i++)
+				printk("%02X", op[i]);
+			printk(") ");
+		}
+		break;
+	}
+	case IPPROTO_UDP: {
+		struct udphdr _udph, *uh;
+
+		/* Max length: 10 "PROTO=UDP " */
+		printk("PROTO=UDP ");
+
+		if (fragment)
+			break;
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		uh = skb_header_pointer(skb, ptr, sizeof(_udph), &_udph);
+		if (uh == NULL) {
+			printk("INCOMPLETE [%u bytes] ", skb->len - ptr);
+			return;
+		}
+
+		/* Max length: 20 "SPT=65535 DPT=65535 " */
+		printk("SPT=%u DPT=%u LEN=%u ",
+		       ntohs(uh->source), ntohs(uh->dest),
+		       ntohs(uh->len));
+		break;
+	}
+	case IPPROTO_ICMPV6: {
+		struct icmp6hdr _icmp6h, *ic;
+
+		/* Max length: 13 "PROTO=ICMPv6 " */
+		printk("PROTO=ICMPv6 ");
+
+		if (fragment)
+			break;
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		ic = skb_header_pointer(skb, ptr, sizeof(_icmp6h), &_icmp6h);
+		if (ic == NULL) {
+			printk("INCOMPLETE [%u bytes] ", skb->len - ptr);
+			return;
+		}
+
+		/* Max length: 18 "TYPE=255 CODE=255 " */
+		printk("TYPE=%u CODE=%u ", ic->icmp6_type, ic->icmp6_code);
+
+		switch (ic->icmp6_type) {
+		case ICMPV6_ECHO_REQUEST:
+		case ICMPV6_ECHO_REPLY:
+			/* Max length: 19 "ID=65535 SEQ=65535 " */
+			printk("ID=%u SEQ=%u ",
+				ntohs(ic->icmp6_identifier),
+				ntohs(ic->icmp6_sequence));
+			break;
+		case ICMPV6_MGM_QUERY:
+		case ICMPV6_MGM_REPORT:
+		case ICMPV6_MGM_REDUCTION:
+			break;
+
+		case ICMPV6_PARAMPROB:
+			/* Max length: 17 "POINTER=ffffffff " */
+			printk("POINTER=%08x ", ntohl(ic->icmp6_pointer));
+			/* Fall through */
+		case ICMPV6_DEST_UNREACH:
+		case ICMPV6_PKT_TOOBIG:
+		case ICMPV6_TIME_EXCEED:
+			/* Max length: 3+maxlen */
+			if (recurse) {
+				printk("[");
+				dump_packet(info, skb, ptr + sizeof(_icmp6h),
+					    0);
+				printk("] ");
+			}
+
+			/* Max length: 10 "MTU=65535 " */
+			if (ic->icmp6_type == ICMPV6_PKT_TOOBIG)
+				printk("MTU=%u ", ntohl(ic->icmp6_mtu));
+		}
+		break;
+	}
+	/* Max length: 10 "PROTO=255 " */
+	default:
+		printk("PROTO=%u ", currenthdr);
+	}
+
+	/* Max length: 15 "UID=4294967295 " */
+	if ((info->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);
+		read_unlock_bh(&skb->sk->sk_callback_lock);
+	}
+}
+
+static void
+ip6t_log_packet(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 char *prefix)
+{
+	struct ipv6hdr *ipv6h = skb->nh.ipv6h;
+
+	spin_lock_bh(&log_lock);
+	printk(level_string);
+	printk("%sIN=%s OUT=%s ",
+		prefix == NULL ? loginfo->prefix : prefix,
+		in ? in->name : "",
+		out ? out->name : "");
+	if (in && !out) {
+		/* 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 ? ' ' : '.');
+			  }
+			}
+		} else
+			printk(" ");
+	}
+
+	dump_packet(loginfo, skb, (u8*)skb->nh.ipv6h - skb->data, 1);
+	printk("\n");
+	spin_unlock_bh(&log_lock);
+}
+
+static unsigned int
+ip6t_log_target(struct sk_buff **pskb,
+		const struct net_device *in,
+		const struct net_device *out,
+		unsigned int hooknum,
+		const void *targinfo,
+		void *userinfo)
+{
+	const struct ip6t_log_info *loginfo = targinfo;
+	char level_string[4] = "< >";
+
+	level_string[1] = '0' + (loginfo->level % 8);
+	ip6t_log_packet(hooknum, *pskb, in, out, loginfo, level_string, NULL);
+
+	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,
+			       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, 
+	.checkentry	= ip6t_log_checkentry, 
+	.me 		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	if (ip6t_register_target(&ip6t_log_reg))
+		return -EINVAL;
+	if (nflog)
+		nf_log_register(PF_INET6, &ip6t_logfn);
+
+	return 0;
+}
+
+static void __exit fini(void)
+{
+	if (nflog)
+		nf_log_unregister(PF_INET6, &ip6t_logfn);
+	ip6t_unregister_target(&ip6t_log_reg);
+}
+
+module_init(init);
+module_exit(fini);