diff options
| -rw-r--r-- | net/ipv6/netfilter/Kconfig | 5 | ||||
| -rw-r--r-- | net/ipv6/netfilter/Makefile | 3 | ||||
| -rw-r--r-- | net/ipv6/netfilter/nf_log_ipv6.c | 427 | ||||
| -rw-r--r-- | net/netfilter/nf_log_syslog.c | 358 |
4 files changed, 360 insertions, 433 deletions
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig index 262bb51a2d99..f22233e44ee9 100644 --- a/net/ipv6/netfilter/Kconfig +++ b/net/ipv6/netfilter/Kconfig @@ -69,7 +69,10 @@ config NF_REJECT_IPV6 config NF_LOG_IPV6 tristate "IPv6 packet logging" default m if NETFILTER_ADVANCED=n - select NF_LOG_COMMON + select NF_LOG_SYSLOG + help + This is a backwards-compat option for the user's convenience + (e.g. when running oldconfig). It selects CONFIG_NF_LOG_SYSLOG. config IP6_NF_IPTABLES tristate "IP6 tables support (required for filtering)" diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile index 731a74c60dca..b85383606df7 100644 --- a/net/ipv6/netfilter/Makefile +++ b/net/ipv6/netfilter/Makefile @@ -18,9 +18,6 @@ obj-$(CONFIG_NF_DEFRAG_IPV6) += nf_defrag_ipv6.o obj-$(CONFIG_NF_SOCKET_IPV6) += nf_socket_ipv6.o obj-$(CONFIG_NF_TPROXY_IPV6) += nf_tproxy_ipv6.o -# logging -obj-$(CONFIG_NF_LOG_IPV6) += nf_log_ipv6.o - # reject obj-$(CONFIG_NF_REJECT_IPV6) += nf_reject_ipv6.o diff --git a/net/ipv6/netfilter/nf_log_ipv6.c b/net/ipv6/netfilter/nf_log_ipv6.c deleted file mode 100644 index 8210ff34ed9b..000000000000 --- a/net/ipv6/netfilter/nf_log_ipv6.c +++ /dev/null @@ -1,427 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* (C) 1999-2001 Paul `Rusty' Russell - * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/spinlock.h> -#include <linux/skbuff.h> -#include <linux/if_arp.h> -#include <linux/ip.h> -#include <net/ipv6.h> -#include <net/icmp.h> -#include <net/udp.h> -#include <net/tcp.h> -#include <net/route.h> - -#include <linux/netfilter.h> -#include <linux/netfilter_ipv6.h> -#include <linux/netfilter/xt_LOG.h> -#include <net/netfilter/nf_log.h> - -static const struct nf_loginfo default_loginfo = { - .type = NF_LOG_TYPE_LOG, - .u = { - .log = { - .level = LOGLEVEL_NOTICE, - .logflags = NF_LOG_DEFAULT_MASK, - }, - }, -}; - -/* One level of recursion won't kill us */ -static void dump_ipv6_packet(struct net *net, struct nf_log_buf *m, - const struct nf_loginfo *info, - const struct sk_buff *skb, unsigned int ip6hoff, - int recurse) -{ - u_int8_t currenthdr; - int fragment; - struct ipv6hdr _ip6h; - const struct ipv6hdr *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_DEFAULT_MASK; - - ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h); - if (ih == NULL) { - nf_log_buf_add(m, "TRUNCATED"); - return; - } - - /* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000 " */ - nf_log_buf_add(m, "SRC=%pI6 DST=%pI6 ", &ih->saddr, &ih->daddr); - - /* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */ - nf_log_buf_add(m, "LEN=%zu TC=%u HOPLIMIT=%u FLOWLBL=%u ", - ntohs(ih->payload_len) + sizeof(struct ipv6hdr), - (ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20, - ih->hop_limit, - (ntohl(*(__be32 *)ih) & 0x000fffff)); - - fragment = 0; - ptr = ip6hoff + sizeof(struct ipv6hdr); - currenthdr = ih->nexthdr; - while (currenthdr != NEXTHDR_NONE && nf_ip6_ext_hdr(currenthdr)) { - struct ipv6_opt_hdr _hdr; - const struct ipv6_opt_hdr *hp; - - hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr); - if (hp == NULL) { - nf_log_buf_add(m, "TRUNCATED"); - return; - } - - /* Max length: 48 "OPT (...) " */ - if (logflags & NF_LOG_IPOPT) - nf_log_buf_add(m, "OPT ( "); - - switch (currenthdr) { - case IPPROTO_FRAGMENT: { - struct frag_hdr _fhdr; - const struct frag_hdr *fh; - - nf_log_buf_add(m, "FRAG:"); - fh = skb_header_pointer(skb, ptr, sizeof(_fhdr), - &_fhdr); - if (fh == NULL) { - nf_log_buf_add(m, "TRUNCATED "); - return; - } - - /* Max length: 6 "65535 " */ - nf_log_buf_add(m, "%u ", ntohs(fh->frag_off) & 0xFFF8); - - /* Max length: 11 "INCOMPLETE " */ - if (fh->frag_off & htons(0x0001)) - nf_log_buf_add(m, "INCOMPLETE "); - - nf_log_buf_add(m, "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 (logflags & NF_LOG_IPOPT) - nf_log_buf_add(m, ")"); - return; - } - hdrlen = ipv6_optlen(hp); - break; - /* Max Length */ - case IPPROTO_AH: - if (logflags & NF_LOG_IPOPT) { - struct ip_auth_hdr _ahdr; - const struct ip_auth_hdr *ah; - - /* Max length: 3 "AH " */ - nf_log_buf_add(m, "AH "); - - if (fragment) { - nf_log_buf_add(m, ")"); - return; - } - - ah = skb_header_pointer(skb, ptr, sizeof(_ahdr), - &_ahdr); - if (ah == NULL) { - /* - * Max length: 26 "INCOMPLETE [65535 - * bytes] )" - */ - nf_log_buf_add(m, "INCOMPLETE [%u bytes] )", - skb->len - ptr); - return; - } - - /* Length: 15 "SPI=0xF1234567 */ - nf_log_buf_add(m, "SPI=0x%x ", ntohl(ah->spi)); - - } - - hdrlen = ipv6_authlen(hp); - break; - case IPPROTO_ESP: - if (logflags & NF_LOG_IPOPT) { - struct ip_esp_hdr _esph; - const struct ip_esp_hdr *eh; - - /* Max length: 4 "ESP " */ - nf_log_buf_add(m, "ESP "); - - if (fragment) { - nf_log_buf_add(m, ")"); - return; - } - - /* - * Max length: 26 "INCOMPLETE [65535 bytes] )" - */ - eh = skb_header_pointer(skb, ptr, sizeof(_esph), - &_esph); - if (eh == NULL) { - nf_log_buf_add(m, "INCOMPLETE [%u bytes] )", - skb->len - ptr); - return; - } - - /* Length: 16 "SPI=0xF1234567 )" */ - nf_log_buf_add(m, "SPI=0x%x )", - ntohl(eh->spi)); - } - return; - default: - /* Max length: 20 "Unknown Ext Hdr 255" */ - nf_log_buf_add(m, "Unknown Ext Hdr %u", currenthdr); - return; - } - if (logflags & NF_LOG_IPOPT) - nf_log_buf_add(m, ") "); - - currenthdr = hp->nexthdr; - ptr += hdrlen; - } - - switch (currenthdr) { - case IPPROTO_TCP: - if (nf_log_dump_tcp_header(m, skb, currenthdr, fragment, - ptr, logflags)) - return; - break; - case IPPROTO_UDP: - case IPPROTO_UDPLITE: - if (nf_log_dump_udp_header(m, skb, currenthdr, fragment, ptr)) - return; - break; - case IPPROTO_ICMPV6: { - struct icmp6hdr _icmp6h; - const struct icmp6hdr *ic; - - /* Max length: 13 "PROTO=ICMPv6 " */ - nf_log_buf_add(m, "PROTO=ICMPv6 "); - - if (fragment) - break; - - /* Max length: 25 "INCOMPLETE [65535 bytes] " */ - ic = skb_header_pointer(skb, ptr, sizeof(_icmp6h), &_icmp6h); - if (ic == NULL) { - nf_log_buf_add(m, "INCOMPLETE [%u bytes] ", - skb->len - ptr); - return; - } - - /* Max length: 18 "TYPE=255 CODE=255 " */ - nf_log_buf_add(m, "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 " */ - nf_log_buf_add(m, "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 " */ - nf_log_buf_add(m, "POINTER=%08x ", - ntohl(ic->icmp6_pointer)); - fallthrough; - case ICMPV6_DEST_UNREACH: - case ICMPV6_PKT_TOOBIG: - case ICMPV6_TIME_EXCEED: - /* Max length: 3+maxlen */ - if (recurse) { - nf_log_buf_add(m, "["); - dump_ipv6_packet(net, m, info, skb, - ptr + sizeof(_icmp6h), 0); - nf_log_buf_add(m, "] "); - } - - /* Max length: 10 "MTU=65535 " */ - if (ic->icmp6_type == ICMPV6_PKT_TOOBIG) { - nf_log_buf_add(m, "MTU=%u ", - ntohl(ic->icmp6_mtu)); - } - } - break; - } - /* Max length: 10 "PROTO=255 " */ - default: - nf_log_buf_add(m, "PROTO=%u ", currenthdr); - } - - /* Max length: 15 "UID=4294967295 " */ - if ((logflags & NF_LOG_UID) && recurse) - nf_log_dump_sk_uid_gid(net, m, skb->sk); - - /* Max length: 16 "MARK=0xFFFFFFFF " */ - if (recurse && skb->mark) - nf_log_buf_add(m, "MARK=0x%x ", skb->mark); -} - -static void dump_ipv6_mac_header(struct nf_log_buf *m, - const struct nf_loginfo *info, - const struct sk_buff *skb) -{ - struct net_device *dev = skb->dev; - unsigned int logflags = 0; - - if (info->type == NF_LOG_TYPE_LOG) - logflags = info->u.log.logflags; - - if (!(logflags & NF_LOG_MACDECODE)) - goto fallback; - - switch (dev->type) { - case ARPHRD_ETHER: - nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ", - eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest); - nf_log_dump_vlan(m, skb); - nf_log_buf_add(m, "MACPROTO=%04x ", - ntohs(eth_hdr(skb)->h_proto)); - return; - default: - break; - } - -fallback: - nf_log_buf_add(m, "MAC="); - if (dev->hard_header_len && - skb->mac_header != skb->network_header) { - const unsigned char *p = skb_mac_header(skb); - unsigned int len = dev->hard_header_len; - unsigned int i; - - if (dev->type == ARPHRD_SIT) { - p -= ETH_HLEN; - - if (p < skb->head) - p = NULL; - } - - if (p != NULL) { - nf_log_buf_add(m, "%02x", *p++); - for (i = 1; i < len; i++) - nf_log_buf_add(m, ":%02x", *p++); - } - nf_log_buf_add(m, " "); - - if (dev->type == ARPHRD_SIT) { - const struct iphdr *iph = - (struct iphdr *)skb_mac_header(skb); - nf_log_buf_add(m, "TUNNEL=%pI4->%pI4 ", &iph->saddr, - &iph->daddr); - } - } else { - nf_log_buf_add(m, " "); - } -} - -static void nf_log_ip6_packet(struct net *net, u_int8_t pf, - unsigned int hooknum, const struct sk_buff *skb, - const struct net_device *in, - const struct net_device *out, - const struct nf_loginfo *loginfo, - const char *prefix) -{ - struct nf_log_buf *m; - - /* FIXME: Disabled from containers until syslog ns is supported */ - if (!net_eq(net, &init_net) && !sysctl_nf_log_all_netns) - return; - - m = nf_log_buf_open(); - - if (!loginfo) - loginfo = &default_loginfo; - - nf_log_dump_packet_common(m, pf, hooknum, skb, in, out, - loginfo, prefix); - - if (in != NULL) - dump_ipv6_mac_header(m, loginfo, skb); - - dump_ipv6_packet(net, m, loginfo, skb, skb_network_offset(skb), 1); - - nf_log_buf_close(m); -} - -static struct nf_logger nf_ip6_logger __read_mostly = { - .name = "nf_log_ipv6", - .type = NF_LOG_TYPE_LOG, - .logfn = nf_log_ip6_packet, - .me = THIS_MODULE, -}; - -static int __net_init nf_log_ipv6_net_init(struct net *net) -{ - return nf_log_set(net, NFPROTO_IPV6, &nf_ip6_logger); -} - -static void __net_exit nf_log_ipv6_net_exit(struct net *net) -{ - nf_log_unset(net, &nf_ip6_logger); -} - -static struct pernet_operations nf_log_ipv6_net_ops = { - .init = nf_log_ipv6_net_init, - .exit = nf_log_ipv6_net_exit, -}; - -static int __init nf_log_ipv6_init(void) -{ - int ret; - - ret = register_pernet_subsys(&nf_log_ipv6_net_ops); - if (ret < 0) - return ret; - - ret = nf_log_register(NFPROTO_IPV6, &nf_ip6_logger); - if (ret < 0) { - pr_err("failed to register logger\n"); - goto err1; - } - - return 0; - -err1: - unregister_pernet_subsys(&nf_log_ipv6_net_ops); - return ret; -} - -static void __exit nf_log_ipv6_exit(void) -{ - unregister_pernet_subsys(&nf_log_ipv6_net_ops); - nf_log_unregister(&nf_ip6_logger); -} - -module_init(nf_log_ipv6_init); -module_exit(nf_log_ipv6_exit); - -MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); -MODULE_DESCRIPTION("Netfilter IPv6 packet logging"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_NF_LOGGER(AF_INET6, 0); diff --git a/net/netfilter/nf_log_syslog.c b/net/netfilter/nf_log_syslog.c index c01769c6d641..9ba71bc2ef84 100644 --- a/net/netfilter/nf_log_syslog.c +++ b/net/netfilter/nf_log_syslog.c @@ -18,6 +18,7 @@ #include <net/route.h> #include <linux/netfilter.h> +#include <linux/netfilter_ipv6.h> #include <linux/netfilter/xt_LOG.h> #include <net/netfilter/nf_log.h> @@ -355,6 +356,249 @@ dump_ipv4_packet(struct net *net, struct nf_log_buf *m, /* maxlen = 230+ 91 + 230 + 252 = 803 */ } +static noinline_for_stack void +dump_ipv6_packet(struct net *net, struct nf_log_buf *m, + const struct nf_loginfo *info, + const struct sk_buff *skb, unsigned int ip6hoff, + int recurse) +{ + const struct ipv6hdr *ih; + unsigned int hdrlen = 0; + unsigned int logflags; + struct ipv6hdr _ip6h; + unsigned int ptr; + u8 currenthdr; + int fragment; + + if (info->type == NF_LOG_TYPE_LOG) + logflags = info->u.log.logflags; + else + logflags = NF_LOG_DEFAULT_MASK; + + ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h); + if (!ih) { + nf_log_buf_add(m, "TRUNCATED"); + return; + } + + /* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000 " */ + nf_log_buf_add(m, "SRC=%pI6 DST=%pI6 ", &ih->saddr, &ih->daddr); + + /* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */ + nf_log_buf_add(m, "LEN=%zu TC=%u HOPLIMIT=%u FLOWLBL=%u ", + ntohs(ih->payload_len) + sizeof(struct ipv6hdr), + (ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20, + ih->hop_limit, + (ntohl(*(__be32 *)ih) & 0x000fffff)); + + fragment = 0; + ptr = ip6hoff + sizeof(struct ipv6hdr); + currenthdr = ih->nexthdr; + while (currenthdr != NEXTHDR_NONE && nf_ip6_ext_hdr(currenthdr)) { + struct ipv6_opt_hdr _hdr; + const struct ipv6_opt_hdr *hp; + + hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr); + if (!hp) { + nf_log_buf_add(m, "TRUNCATED"); + return; + } + + /* Max length: 48 "OPT (...) " */ + if (logflags & NF_LOG_IPOPT) + nf_log_buf_add(m, "OPT ( "); + + switch (currenthdr) { + case IPPROTO_FRAGMENT: { + struct frag_hdr _fhdr; + const struct frag_hdr *fh; + + nf_log_buf_add(m, "FRAG:"); + fh = skb_header_pointer(skb, ptr, sizeof(_fhdr), + &_fhdr); + if (!fh) { + nf_log_buf_add(m, "TRUNCATED "); + return; + } + + /* Max length: 6 "65535 " */ + nf_log_buf_add(m, "%u ", ntohs(fh->frag_off) & 0xFFF8); + + /* Max length: 11 "INCOMPLETE " */ + if (fh->frag_off & htons(0x0001)) + nf_log_buf_add(m, "INCOMPLETE "); + + nf_log_buf_add(m, "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 (logflags & NF_LOG_IPOPT) + nf_log_buf_add(m, ")"); + return; + } + hdrlen = ipv6_optlen(hp); + break; + /* Max Length */ + case IPPROTO_AH: + if (logflags & NF_LOG_IPOPT) { + struct ip_auth_hdr _ahdr; + const struct ip_auth_hdr *ah; + + /* Max length: 3 "AH " */ + nf_log_buf_add(m, "AH "); + + if (fragment) { + nf_log_buf_add(m, ")"); + return; + } + + ah = skb_header_pointer(skb, ptr, sizeof(_ahdr), + &_ahdr); + if (!ah) { + /* Max length: 26 "INCOMPLETE [65535 bytes] )" */ + nf_log_buf_add(m, "INCOMPLETE [%u bytes] )", + skb->len - ptr); + return; + } + + /* Length: 15 "SPI=0xF1234567 */ + nf_log_buf_add(m, "SPI=0x%x ", ntohl(ah->spi)); + } + + hdrlen = ipv6_authlen(hp); + break; + case IPPROTO_ESP: + if (logflags & NF_LOG_IPOPT) { + struct ip_esp_hdr _esph; + const struct ip_esp_hdr *eh; + + /* Max length: 4 "ESP " */ + nf_log_buf_add(m, "ESP "); + + if (fragment) { + nf_log_buf_add(m, ")"); + return; + } + + /* Max length: 26 "INCOMPLETE [65535 bytes] )" */ + eh = skb_header_pointer(skb, ptr, sizeof(_esph), + &_esph); + if (!eh) { + nf_log_buf_add(m, "INCOMPLETE [%u bytes] )", + skb->len - ptr); + return; + } + + /* Length: 16 "SPI=0xF1234567 )" */ + nf_log_buf_add(m, "SPI=0x%x )", + ntohl(eh->spi)); + } + return; + default: + /* Max length: 20 "Unknown Ext Hdr 255" */ + nf_log_buf_add(m, "Unknown Ext Hdr %u", currenthdr); + return; + } + if (logflags & NF_LOG_IPOPT) + nf_log_buf_add(m, ") "); + + currenthdr = hp->nexthdr; + ptr += hdrlen; + } + + switch (currenthdr) { + case IPPROTO_TCP: + if (nf_log_dump_tcp_header(m, skb, currenthdr, fragment, + ptr, logflags)) + return; + break; + case IPPROTO_UDP: + case IPPROTO_UDPLITE: + if (nf_log_dump_udp_header(m, skb, currenthdr, fragment, ptr)) + return; + break; + case IPPROTO_ICMPV6: { + struct icmp6hdr _icmp6h; + const struct icmp6hdr *ic; + + /* Max length: 13 "PROTO=ICMPv6 " */ + nf_log_buf_add(m, "PROTO=ICMPv6 "); + + if (fragment) + break; + + /* Max length: 25 "INCOMPLETE [65535 bytes] " */ + ic = skb_header_pointer(skb, ptr, sizeof(_icmp6h), &_icmp6h); + if (!ic) { + nf_log_buf_add(m, "INCOMPLETE [%u bytes] ", + skb->len - ptr); + return; + } + + /* Max length: 18 "TYPE=255 CODE=255 " */ + nf_log_buf_add(m, "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 " */ + nf_log_buf_add(m, "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 " */ + nf_log_buf_add(m, "POINTER=%08x ", + ntohl(ic->icmp6_pointer)); + fallthrough; + case ICMPV6_DEST_UNREACH: + case ICMPV6_PKT_TOOBIG: + case ICMPV6_TIME_EXCEED: + /* Max length: 3+maxlen */ + if (recurse) { + nf_log_buf_add(m, "["); + dump_ipv6_packet(net, m, info, skb, + ptr + sizeof(_icmp6h), 0); + nf_log_buf_add(m, "] "); + } + + /* Max length: 10 "MTU=65535 " */ + if (ic->icmp6_type == ICMPV6_PKT_TOOBIG) { + nf_log_buf_add(m, "MTU=%u ", + ntohl(ic->icmp6_mtu)); + } + } + break; + } + /* Max length: 10 "PROTO=255 " */ + default: + nf_log_buf_add(m, "PROTO=%u ", currenthdr); + } + + /* Max length: 15 "UID=4294967295 " */ + if ((logflags & NF_LOG_UID) && recurse) + nf_log_dump_sk_uid_gid(net, m, skb->sk); + + /* Max length: 16 "MARK=0xFFFFFFFF " */ + if (recurse && skb->mark) + nf_log_buf_add(m, "MARK=0x%x ", skb->mark); +} + static void dump_ipv4_mac_header(struct nf_log_buf *m, const struct nf_loginfo *info, const struct sk_buff *skb) @@ -430,6 +674,100 @@ static struct nf_logger nf_ip_logger __read_mostly = { .me = THIS_MODULE, }; +static void dump_ipv6_mac_header(struct nf_log_buf *m, + const struct nf_loginfo *info, + const struct sk_buff *skb) +{ + struct net_device *dev = skb->dev; + unsigned int logflags = 0; + + if (info->type == NF_LOG_TYPE_LOG) + logflags = info->u.log.logflags; + + if (!(logflags & NF_LOG_MACDECODE)) + goto fallback; + + switch (dev->type) { + case ARPHRD_ETHER: + nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ", + eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest); + nf_log_dump_vlan(m, skb); + nf_log_buf_add(m, "MACPROTO=%04x ", + ntohs(eth_hdr(skb)->h_proto)); + return; + default: + break; + } + +fallback: + nf_log_buf_add(m, "MAC="); + if (dev->hard_header_len && + skb->mac_header != skb->network_header) { + const unsigned char *p = skb_mac_header(skb); + unsigned int len = dev->hard_header_len; + unsigned int i; + + if (dev->type == ARPHRD_SIT) { + p -= ETH_HLEN; + + if (p < skb->head) + p = NULL; + } + + if (p) { + nf_log_buf_add(m, "%02x", *p++); + for (i = 1; i < len; i++) + nf_log_buf_add(m, ":%02x", *p++); + } + nf_log_buf_add(m, " "); + + if (dev->type == ARPHRD_SIT) { + const struct iphdr *iph = + (struct iphdr *)skb_mac_header(skb); + nf_log_buf_add(m, "TUNNEL=%pI4->%pI4 ", &iph->saddr, + &iph->daddr); + } + } else { + nf_log_buf_add(m, " "); + } +} + +static void nf_log_ip6_packet(struct net *net, u_int8_t pf, + unsigned int hooknum, const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *loginfo, + const char *prefix) +{ + struct nf_log_buf *m; + + /* FIXME: Disabled from containers until syslog ns is supported */ + if (!net_eq(net, &init_net) && !sysctl_nf_log_all_netns) + return; + + m = nf_log_buf_open(); + + if (!loginfo) + loginfo = &default_loginfo; + + nf_log_dump_packet_common(m, pf, hooknum, skb, in, out, + loginfo, prefix); + + if (in) + dump_ipv6_mac_header(m, loginfo, skb); + + dump_ipv6_packet(net, m, loginfo, skb, skb_network_offset(skb), 1); + + nf_log_buf_close(m); +} + +static struct nf_logger nf_ip6_logger __read_mostly = { + .name = "nf_log_ipv6", + .type = NF_LOG_TYPE_LOG, + .logfn = nf_log_ip6_packet, + .me = THIS_MODULE, +}; + static int __net_init nf_log_syslog_net_init(struct net *net) { int ret = nf_log_set(net, NFPROTO_IPV4, &nf_ip_logger); @@ -440,8 +778,15 @@ static int __net_init nf_log_syslog_net_init(struct net *net) ret = nf_log_set(net, NFPROTO_ARP, &nf_arp_logger); if (ret) goto err1; -err1: + + ret = nf_log_set(net, NFPROTO_IPV6, &nf_ip6_logger); + if (ret) + goto err2; + return 0; +err2: nf_log_unset(net, &nf_arp_logger); +err1: + nf_log_unset(net, &nf_ip_logger); return ret; } @@ -472,9 +817,15 @@ static int __init nf_log_syslog_init(void) if (ret < 0) goto err2; + ret = nf_log_register(NFPROTO_IPV6, &nf_ip6_logger); + if (ret < 0) + goto err3; + return 0; -err2: +err3: nf_log_unregister(&nf_arp_logger); +err2: + nf_log_unregister(&nf_ip_logger); err1: pr_err("failed to register logger\n"); unregister_pernet_subsys(&nf_log_syslog_net_ops); @@ -486,6 +837,7 @@ static void __exit nf_log_syslog_exit(void) unregister_pernet_subsys(&nf_log_syslog_net_ops); nf_log_unregister(&nf_ip_logger); nf_log_unregister(&nf_arp_logger); + nf_log_unregister(&nf_ip6_logger); } module_init(nf_log_syslog_init); @@ -496,5 +848,7 @@ MODULE_DESCRIPTION("Netfilter syslog packet logging"); MODULE_LICENSE("GPL"); MODULE_ALIAS("nf_log_arp"); MODULE_ALIAS("nf_log_ipv4"); +MODULE_ALIAS("nf_log_ipv6"); MODULE_ALIAS_NF_LOGGER(AF_INET, 0); MODULE_ALIAS_NF_LOGGER(3, 0); +MODULE_ALIAS_NF_LOGGER(AF_INET6, 0); |