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1275 |
phoenix |
/*
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* This is a module which is used for queueing IPv4 packets and
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* communicating with userspace via netlink.
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*
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* (C) 2000 James Morris, this code is GPL.
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*/
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#ifndef _IP_QUEUE_H
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#define _IP_QUEUE_H
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#ifdef __KERNEL__
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#ifdef DEBUG_IPQ
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#define QDEBUG(x...) printk(KERN_DEBUG ## x)
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#else
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#define QDEBUG(x...)
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#endif /* DEBUG_IPQ */
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#else
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#include <net/if.h>
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#endif /* ! __KERNEL__ */
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/* Messages sent from kernel */
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typedef struct ipq_packet_msg {
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unsigned long packet_id; /* ID of queued packet */
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unsigned long mark; /* Netfilter mark value */
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long timestamp_sec; /* Packet arrival time (seconds) */
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long timestamp_usec; /* Packet arrvial time (+useconds) */
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unsigned int hook; /* Netfilter hook we rode in on */
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char indev_name[IFNAMSIZ]; /* Name of incoming interface */
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char outdev_name[IFNAMSIZ]; /* Name of outgoing interface */
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unsigned short hw_protocol; /* Hardware protocol (network order) */
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unsigned short hw_type; /* Hardware type */
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unsigned char hw_addrlen; /* Hardware address length */
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unsigned char hw_addr[8]; /* Hardware address */
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size_t data_len; /* Length of packet data */
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unsigned char payload[0]; /* Optional packet data */
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} ipq_packet_msg_t;
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/* Messages sent from userspace */
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typedef struct ipq_mode_msg {
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unsigned char value; /* Requested mode */
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size_t range; /* Optional range of packet requested */
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} ipq_mode_msg_t;
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typedef struct ipq_verdict_msg {
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unsigned int value; /* Verdict to hand to netfilter */
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unsigned long id; /* Packet ID for this verdict */
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size_t data_len; /* Length of replacement data */
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unsigned char payload[0]; /* Optional replacement packet */
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} ipq_verdict_msg_t;
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typedef struct ipq_peer_msg {
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union {
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ipq_verdict_msg_t verdict;
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ipq_mode_msg_t mode;
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} msg;
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} ipq_peer_msg_t;
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/* Packet delivery modes */
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enum {
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IPQ_COPY_NONE, /* Initial mode, packets are dropped */
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IPQ_COPY_META, /* Copy metadata */
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IPQ_COPY_PACKET /* Copy metadata + packet (range) */
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};
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#define IPQ_COPY_MAX IPQ_COPY_PACKET
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/* Types of messages */
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#define IPQM_BASE 0x10 /* standard netlink messages below this */
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#define IPQM_MODE (IPQM_BASE + 1) /* Mode request from peer */
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#define IPQM_VERDICT (IPQM_BASE + 2) /* Verdict from peer */
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#define IPQM_PACKET (IPQM_BASE + 3) /* Packet from kernel */
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#define IPQM_MAX (IPQM_BASE + 4)
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#endif /*_IP_QUEUE_H*/
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