Edit File: ip_queue.h
/* * This is a module which is used for queueing IPv4 packets and * communicating with userspace via netlink. * * (C) 2000 James Morris, this code is GPL. */ #ifndef _IP_QUEUE_H #define _IP_QUEUE_H #include <net/if.h> /* Messages sent from kernel */ typedef struct ipq_packet_msg { unsigned long packet_id; /* ID of queued packet */ unsigned long mark; /* Netfilter mark value */ long timestamp_sec; /* Packet arrival time (seconds) */ long timestamp_usec; /* Packet arrvial time (+useconds) */ unsigned int hook; /* Netfilter hook we rode in on */ char indev_name[IFNAMSIZ]; /* Name of incoming interface */ char outdev_name[IFNAMSIZ]; /* Name of outgoing interface */ __be16 hw_protocol; /* Hardware protocol (network order) */ unsigned short hw_type; /* Hardware type */ unsigned char hw_addrlen; /* Hardware address length */ unsigned char hw_addr[8]; /* Hardware address */ size_t data_len; /* Length of packet data */ unsigned char payload[0]; /* Optional packet data */ } ipq_packet_msg_t; /* Messages sent from userspace */ typedef struct ipq_mode_msg { unsigned char value; /* Requested mode */ size_t range; /* Optional range of packet requested */ } ipq_mode_msg_t; typedef struct ipq_verdict_msg { unsigned int value; /* Verdict to hand to netfilter */ unsigned long id; /* Packet ID for this verdict */ size_t data_len; /* Length of replacement data */ unsigned char payload[0]; /* Optional replacement packet */ } ipq_verdict_msg_t; typedef struct ipq_peer_msg { union { ipq_verdict_msg_t verdict; ipq_mode_msg_t mode; } msg; } ipq_peer_msg_t; /* Packet delivery modes */ enum { IPQ_COPY_NONE, /* Initial mode, packets are dropped */ IPQ_COPY_META, /* Copy metadata */ IPQ_COPY_PACKET /* Copy metadata + packet (range) */ }; #define IPQ_COPY_MAX IPQ_COPY_PACKET /* Types of messages */ #define IPQM_BASE 0x10 /* standard netlink messages below this */ #define IPQM_MODE (IPQM_BASE + 1) /* Mode request from peer */ #define IPQM_VERDICT (IPQM_BASE + 2) /* Verdict from peer */ #define IPQM_PACKET (IPQM_BASE + 3) /* Packet from kernel */ #define IPQM_MAX (IPQM_BASE + 4) #endif /*_IP_QUEUE_H*/
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