From 5d22fc9815671e8b67257c06bbe0c21f0e3536ef Mon Sep 17 00:00:00 2001 From: "/C=DE/ST=Berlin/L=Berlin/O=Netfilter Project/OU=Development/CN=laforge/emailAddress=laforge@netfilter.org" Date: Fri, 11 Nov 2005 14:17:18 +0000 Subject: - include copy of 'linux/nfnetlink.h' as 'libnfnetlink/linux_nfnetlink.h' - remove checks for kernel source, since we don't need that anymore - bump version number to 0.0.11 --- include/libnfnetlink/Makefile.am | 2 +- include/libnfnetlink/libnfnetlink.h | 2 +- include/libnfnetlink/linux_nfnetlink.h | 173 +++++++++++++++++++++++++++++++++ 3 files changed, 175 insertions(+), 2 deletions(-) create mode 100644 include/libnfnetlink/linux_nfnetlink.h (limited to 'include') diff --git a/include/libnfnetlink/Makefile.am b/include/libnfnetlink/Makefile.am index ad946f0..81e14c8 100644 --- a/include/libnfnetlink/Makefile.am +++ b/include/libnfnetlink/Makefile.am @@ -1,3 +1,3 @@ -pkginclude_HEADERS = libnfnetlink.h +pkginclude_HEADERS = libnfnetlink.h linux_nfnetlink.h diff --git a/include/libnfnetlink/libnfnetlink.h b/include/libnfnetlink/libnfnetlink.h index d789418..8b321ac 100644 --- a/include/libnfnetlink/libnfnetlink.h +++ b/include/libnfnetlink/libnfnetlink.h @@ -16,7 +16,7 @@ #include #include /* for sa_family_t */ #include -#include +#include #define NLMSG_TAIL(nlh) \ (((void *) (nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)) diff --git a/include/libnfnetlink/linux_nfnetlink.h b/include/libnfnetlink/linux_nfnetlink.h new file mode 100644 index 0000000..f08e870 --- /dev/null +++ b/include/libnfnetlink/linux_nfnetlink.h @@ -0,0 +1,173 @@ +#ifndef _NFNETLINK_H +#define _NFNETLINK_H +#include + +#ifndef __KERNEL__ +/* nfnetlink groups: Up to 32 maximum - backwards compatibility for userspace */ +#define NF_NETLINK_CONNTRACK_NEW 0x00000001 +#define NF_NETLINK_CONNTRACK_UPDATE 0x00000002 +#define NF_NETLINK_CONNTRACK_DESTROY 0x00000004 +#define NF_NETLINK_CONNTRACK_EXP_NEW 0x00000008 +#define NF_NETLINK_CONNTRACK_EXP_UPDATE 0x00000010 +#define NF_NETLINK_CONNTRACK_EXP_DESTROY 0x00000020 +#endif + +enum nfnetlink_groups { + NFNLGRP_NONE, +#define NFNLGRP_NONE NFNLGRP_NONE + NFNLGRP_CONNTRACK_NEW, +#define NFNLGRP_CONNTRACK_NEW NFNLGRP_CONNTRACK_NEW + NFNLGRP_CONNTRACK_UPDATE, +#define NFNLGRP_CONNTRACK_UPDATE NFNLGRP_CONNTRACK_UPDATE + NFNLGRP_CONNTRACK_DESTROY, +#define NFNLGRP_CONNTRACK_DESTROY NFNLGRP_CONNTRACK_DESTROY + NFNLGRP_CONNTRACK_EXP_NEW, +#define NFNLGRP_CONNTRACK_EXP_NEW NFNLGRP_CONNTRACK_EXP_NEW + NFNLGRP_CONNTRACK_EXP_UPDATE, +#define NFNLGRP_CONNTRACK_EXP_UPDATE NFNLGRP_CONNTRACK_EXP_UPDATE + NFNLGRP_CONNTRACK_EXP_DESTROY, +#define NFNLGRP_CONNTRACK_EXP_DESTROY NFNLGRP_CONNTRACK_EXP_DESTROY + __NFNLGRP_MAX, +}; +#define NFNLGRP_MAX (__NFNLGRP_MAX - 1) + +/* Generic structure for encapsulation optional netfilter information. + * It is reminiscent of sockaddr, but with sa_family replaced + * with attribute type. + * ! This should someday be put somewhere generic as now rtnetlink and + * ! nfnetlink use the same attributes methods. - J. Schulist. + */ + +struct nfattr +{ + u_int16_t nfa_len; + u_int16_t nfa_type; /* we use 15 bits for the type, and the highest + * bit to indicate whether the payload is nested */ +} __attribute__ ((packed)); + +/* FIXME: Apart from NFNL_NFA_NESTED shamelessly copy and pasted from + * rtnetlink.h, it's time to put this in a generic file */ + +#define NFNL_NFA_NEST 0x8000 +#define NFA_TYPE(attr) ((attr)->nfa_type & 0x7fff) + +#define NFA_ALIGNTO 4 +#define NFA_ALIGN(len) (((len) + NFA_ALIGNTO - 1) & ~(NFA_ALIGNTO - 1)) +#define NFA_OK(nfa,len) ((len) > 0 && (nfa)->nfa_len >= sizeof(struct nfattr) \ + && (nfa)->nfa_len <= (len)) +#define NFA_NEXT(nfa,attrlen) ((attrlen) -= NFA_ALIGN((nfa)->nfa_len), \ + (struct nfattr *)(((char *)(nfa)) + NFA_ALIGN((nfa)->nfa_len))) +#define NFA_LENGTH(len) (NFA_ALIGN(sizeof(struct nfattr)) + (len)) +#define NFA_SPACE(len) NFA_ALIGN(NFA_LENGTH(len)) +#define NFA_DATA(nfa) ((void *)(((char *)(nfa)) + NFA_LENGTH(0))) +#define NFA_PAYLOAD(nfa) ((int)((nfa)->nfa_len) - NFA_LENGTH(0)) +#define NFA_NEST(skb, type) \ +({ struct nfattr *__start = (struct nfattr *) (skb)->tail; \ + NFA_PUT(skb, (NFNL_NFA_NEST | type), 0, NULL); \ + __start; }) +#define NFA_NEST_END(skb, start) \ +({ (start)->nfa_len = ((skb)->tail - (unsigned char *) (start)); \ + (skb)->len; }) +#define NFA_NEST_CANCEL(skb, start) \ +({ if (start) \ + skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ + -1; }) + +/* General form of address family dependent message. + */ +struct nfgenmsg { + u_int8_t nfgen_family; /* AF_xxx */ + u_int8_t version; /* nfnetlink version */ + u_int16_t res_id; /* resource id */ +} __attribute__ ((packed)); + +#define NFNETLINK_V0 0 + +#define NFM_NFA(n) ((struct nfattr *)(((char *)(n)) \ + + NLMSG_ALIGN(sizeof(struct nfgenmsg)))) +#define NFM_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct nfgenmsg)) + +/* netfilter netlink message types are split in two pieces: + * 8 bit subsystem, 8bit operation. + */ + +#define NFNL_SUBSYS_ID(x) ((x & 0xff00) >> 8) +#define NFNL_MSG_TYPE(x) (x & 0x00ff) + +/* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS() + * won't work anymore */ +#define NFNL_SUBSYS_NONE 0 +#define NFNL_SUBSYS_CTNETLINK 1 +#define NFNL_SUBSYS_CTNETLINK_EXP 2 +#define NFNL_SUBSYS_QUEUE 3 +#define NFNL_SUBSYS_ULOG 4 +#define NFNL_SUBSYS_COUNT 5 + +#ifdef __KERNEL__ + +#include +#include + +struct nfnl_callback +{ + int (*call)(struct sock *nl, struct sk_buff *skb, + struct nlmsghdr *nlh, struct nfattr *cda[], int *errp); + kernel_cap_t cap_required; /* capabilities required for this msg */ + u_int16_t attr_count; /* number of nfattr's */ +}; + +struct nfnetlink_subsystem +{ + const char *name; + __u8 subsys_id; /* nfnetlink subsystem ID */ + __u8 cb_count; /* number of callbacks */ + struct nfnl_callback *cb; /* callback for individual types */ +}; + +extern void __nfa_fill(struct sk_buff *skb, int attrtype, + int attrlen, const void *data); +#define NFA_PUT(skb, attrtype, attrlen, data) \ +({ if (skb_tailroom(skb) < (int)NFA_SPACE(attrlen)) goto nfattr_failure; \ + __nfa_fill(skb, attrtype, attrlen, data); }) + +extern struct semaphore nfnl_sem; + +#define nfnl_shlock() down(&nfnl_sem) +#define nfnl_shlock_nowait() down_trylock(&nfnl_sem) + +#define nfnl_shunlock() do { up(&nfnl_sem); \ + if(nfnl && nfnl->sk_receive_queue.qlen) \ + nfnl->sk_data_ready(nfnl, 0); \ + } while(0) + +extern void nfnl_lock(void); +extern void nfnl_unlock(void); + +extern int nfnetlink_subsys_register(struct nfnetlink_subsystem *n); +extern int nfnetlink_subsys_unregister(struct nfnetlink_subsystem *n); + +extern int nfattr_parse(struct nfattr *tb[], int maxattr, + struct nfattr *nfa, int len); + +#define nfattr_parse_nested(tb, max, nfa) \ + nfattr_parse((tb), (max), NFA_DATA((nfa)), NFA_PAYLOAD((nfa))) + +#define nfattr_bad_size(tb, max, cta_min) \ +({ int __i, __res = 0; \ + for (__i=0; __i