| /* |
| * 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*/ |
