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/* libnfqnetlink.h: Header file for the Netfilter Queue library.
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*
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* (C) 2005 by Harald Welte <laforge@gnumonks.org>
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*
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*
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* Changelog :
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* (2005/08/11) added parsing function (Eric Leblond <regit@inl.fr>)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*/
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#ifndef __LIBCTNETLINK_H
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#define __LIBCTNETLINK_H
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#include <sys/time.h>
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#include <libnfnetlink/libnfnetlink.h>
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#include <libnetfilter_queue/linux_nfnetlink_queue.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct nfq_handle;
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struct nfq_q_handle;
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struct nfq_data;
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extern int nfq_errno;
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extern struct nfnl_handle *nfq_nfnlh(struct nfq_handle *h);
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extern int nfq_fd(struct nfq_handle *h);
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typedef int nfq_callback(struct nfq_q_handle *gh, struct nfgenmsg *nfmsg,
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struct nfq_data *nfad, void *data);
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extern struct nfq_handle *nfq_open(void);
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extern struct nfq_handle *nfq_open_nfnl(struct nfnl_handle *nfnlh);
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extern int nfq_close(struct nfq_handle *h);
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extern int nfq_bind_pf(struct nfq_handle *h, uint16_t pf);
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extern int nfq_unbind_pf(struct nfq_handle *h, uint16_t pf);
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extern struct nfq_q_handle *nfq_create_queue(struct nfq_handle *h,
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uint16_t num,
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nfq_callback *cb,
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void *data);
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extern int nfq_destroy_queue(struct nfq_q_handle *qh);
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extern int nfq_handle_packet(struct nfq_handle *h, char *buf, int len);
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extern int nfq_set_mode(struct nfq_q_handle *qh,
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uint8_t mode, unsigned int len);
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int nfq_set_queue_maxlen(struct nfq_q_handle *qh,
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uint32_t queuelen);
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extern int nfq_set_queue_flags(struct nfq_q_handle *qh,
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uint32_t mask, uint32_t flags);
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extern int nfq_set_verdict(struct nfq_q_handle *qh,
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uint32_t id,
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uint32_t verdict,
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uint32_t data_len,
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const unsigned char *buf);
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extern int nfq_set_verdict2(struct nfq_q_handle *qh,
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uint32_t id,
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uint32_t verdict,
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uint32_t mark,
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uint32_t datalen,
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const unsigned char *buf);
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extern int nfq_set_verdict_batch(struct nfq_q_handle *qh,
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uint32_t id,
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uint32_t verdict);
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extern int nfq_set_verdict_batch2(struct nfq_q_handle *qh,
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uint32_t id,
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uint32_t verdict,
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uint32_t mark);
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extern __attribute__((deprecated))
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int nfq_set_verdict_mark(struct nfq_q_handle *qh,
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uint32_t id,
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uint32_t verdict,
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uint32_t mark,
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uint32_t datalen,
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const unsigned char *buf);
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/* message parsing function */
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extern struct nfqnl_msg_packet_hdr *
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nfq_get_msg_packet_hdr(struct nfq_data *nfad);
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extern uint32_t nfq_get_nfmark(struct nfq_data *nfad);
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extern int nfq_get_timestamp(struct nfq_data *nfad, struct timeval *tv);
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/* return 0 if not set */
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extern uint32_t nfq_get_indev(struct nfq_data *nfad);
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extern uint32_t nfq_get_physindev(struct nfq_data *nfad);
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extern uint32_t nfq_get_outdev(struct nfq_data *nfad);
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extern uint32_t nfq_get_physoutdev(struct nfq_data *nfad);
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extern uint32_t nfq_get_skbinfo(struct nfq_data *nfad);
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extern int nfq_get_uid(struct nfq_data *nfad, uint32_t *uid);
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extern int nfq_get_gid(struct nfq_data *nfad, uint32_t *gid);
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extern int nfq_get_secctx(struct nfq_data *nfad, unsigned char **secdata);
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extern int nfq_get_indev_name(struct nlif_handle *nlif_handle,
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struct nfq_data *nfad, char *name);
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extern int nfq_get_physindev_name(struct nlif_handle *nlif_handle,
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struct nfq_data *nfad, char *name);
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extern int nfq_get_outdev_name(struct nlif_handle *nlif_handle,
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struct nfq_data *nfad, char *name);
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extern int nfq_get_physoutdev_name(struct nlif_handle *nlif_handle,
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struct nfq_data *nfad, char *name);
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extern struct nfqnl_msg_packet_hw *nfq_get_packet_hw(struct nfq_data *nfad);
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/* return -1 if problem, length otherwise */
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extern int nfq_get_payload(struct nfq_data *nfad, unsigned char **data);
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enum {
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NFQ_XML_HW = (1 << 0),
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NFQ_XML_MARK = (1 << 1),
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NFQ_XML_DEV = (1 << 2),
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NFQ_XML_PHYSDEV = (1 << 3),
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NFQ_XML_PAYLOAD = (1 << 4),
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NFQ_XML_TIME = (1 << 5),
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NFQ_XML_UID = (1 << 6),
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NFQ_XML_GID = (1 << 7),
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NFQ_XML_SECCTX = (1 << 8),
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NFQ_XML_ALL = ~0U,
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};
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extern int nfq_snprintf_xml(char *buf, size_t len, struct nfq_data *tb, int flags);
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/*
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* New API based on libmnl
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*/
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void nfq_nlmsg_cfg_put_cmd(struct nlmsghdr *nlh, uint16_t pf, uint8_t cmd);
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void nfq_nlmsg_cfg_put_params(struct nlmsghdr *nlh, uint8_t mode, int range);
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void nfq_nlmsg_cfg_put_qmaxlen(struct nlmsghdr *nlh, uint32_t qmaxlen);
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void nfq_nlmsg_verdict_put(struct nlmsghdr *nlh, int id, int verdict);
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void nfq_nlmsg_verdict_put_mark(struct nlmsghdr *nlh, uint32_t mark);
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void nfq_nlmsg_verdict_put_pkt(struct nlmsghdr *nlh, const void *pkt, uint32_t pktlen);
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int nfq_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr **attr);
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struct nlmsghdr *nfq_nlmsg_put(char *buf, int type, uint32_t queue_num);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __LIBNFQNETLINK_H */
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