195 lines
6.5 KiB
Cython
195 lines
6.5 KiB
Cython
cdef extern from "sys/types.h":
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ctypedef unsigned char u_int8_t
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ctypedef unsigned short int u_int16_t
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ctypedef unsigned int u_int32_t
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cdef extern from "netinet/ip.h":
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struct iphdr:
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u_int8_t tos
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u_int16_t tot_len
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u_int16_t id
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u_int16_t frag_off
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u_int8_t ttl
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u_int8_t protocol
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u_int16_t check
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u_int32_t saddr
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u_int32_t daddr
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# Dummy defines from netinet/in.h:
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cdef enum:
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IPPROTO_IP = 0 # Dummy protocol for TCP.
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IPPROTO_HOPOPTS = 0 # IPv6 Hop-by-Hop options.
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IPPROTO_ICMP = 1 # Internet Control Message Protocol.
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IPPROTO_IGMP = 2 # Internet Group Management Protocol. */
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IPPROTO_IPIP = 4 # IPIP tunnels (older KA9Q tunnels use 94).
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IPPROTO_TCP = 6 # Transmission Control Protocol.
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IPPROTO_EGP = 8 # Exterior Gateway Protocol.
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IPPROTO_PUP = 12 # PUP protocol.
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IPPROTO_UDP = 17 # User Datagram Protocol.
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IPPROTO_IDP = 22 # XNS IDP protocol.
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IPPROTO_TP = 29 # SO Transport Protocol Class 4.
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IPPROTO_IPV6 = 41 # IPv6 header.
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IPPROTO_ROUTING = 43 # IPv6 routing header.
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IPPROTO_FRAGMENT = 44 # IPv6 fragmentation header.
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IPPROTO_RSVP = 46 # Reservation Protocol.
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IPPROTO_GRE = 47 # General Routing Encapsulation.
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IPPROTO_ESP = 50 # encapsulating security payload.
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IPPROTO_AH = 51 # authentication header.
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IPPROTO_ICMPV6 = 58 # ICMPv6.
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IPPROTO_NONE = 59 # IPv6 no next header.
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IPPROTO_DSTOPTS = 60 # IPv6 destination options.
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IPPROTO_MTP = 92 # Multicast Transport Protocol.
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IPPROTO_ENCAP = 98 # Encapsulation Header.
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IPPROTO_PIM = 103 # Protocol Independent Multicast.
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IPPROTO_COMP = 108 # Compression Header Protocol.
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IPPROTO_SCTP = 132 # Stream Control Transmission Protocol.
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IPPROTO_RAW = 255 # Raw IP packets.
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IPPROTO_MAX
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cdef extern from "Python.h":
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object PyString_FromStringAndSize(char *s, Py_ssize_t len)
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cdef extern from "sys/time.h":
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ctypedef long time_t
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struct timeval:
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time_t tv_sec
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time_t tv_usec
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struct timezone:
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pass
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cdef extern from "netinet/in.h":
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u_int32_t ntohl (u_int32_t __netlong) nogil
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u_int16_t ntohs (u_int16_t __netshort) nogil
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u_int32_t htonl (u_int32_t __hostlong) nogil
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u_int16_t htons (u_int16_t __hostshort) nogil
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cdef extern from "libnfnetlink/linux_nfnetlink.h":
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struct nfgenmsg:
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u_int8_t nfgen_family
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u_int8_t version
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u_int16_t res_id
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cdef extern from "libnetfilter_queue/linux_nfnetlink_queue.h":
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enum nfqnl_config_mode:
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NFQNL_COPY_NONE
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NFQNL_COPY_META
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NFQNL_COPY_PACKET
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struct nfqnl_msg_packet_hdr:
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u_int32_t packet_id
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u_int16_t hw_protocol
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u_int8_t hook
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cdef extern from "libnetfilter_queue/libnetfilter_queue.h":
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struct nfq_handle:
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pass
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struct nfq_q_handle:
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pass
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struct nfq_data:
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pass
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struct nfqnl_msg_packet_hw:
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u_int8_t hw_addr[8]
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nfq_handle *nfq_open()
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int nfq_close(nfq_handle *h)
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int nfq_bind_pf(nfq_handle *h, u_int16_t pf)
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int nfq_unbind_pf(nfq_handle *h, u_int16_t pf)
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ctypedef int *nfq_callback(nfq_q_handle *gh, nfgenmsg *nfmsg,
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nfq_data *nfad, void *data)
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nfq_q_handle *nfq_create_queue(nfq_handle *h,
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u_int16_t num,
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nfq_callback *cb,
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void *data)
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int nfq_destroy_queue(nfq_q_handle *qh)
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int nfq_handle_packet(nfq_handle *h, char *buf, int len)
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int nfq_set_mode(nfq_q_handle *qh,
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u_int8_t mode, unsigned int len)
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q_set_queue_maxlen(nfq_q_handle *qh,
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u_int32_t queuelen)
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int nfq_set_verdict(nfq_q_handle *qh,
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u_int32_t id,
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u_int32_t verdict,
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u_int32_t data_len,
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unsigned char *buf) nogil
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int nfq_set_verdict_mark(nfq_q_handle *qh,
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u_int32_t id,
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u_int32_t verdict,
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u_int32_t mark,
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u_int32_t datalen,
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unsigned char *buf) nogil
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int nfq_set_queue_maxlen(nfq_q_handle *qh, u_int32_t queuelen)
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int nfq_fd(nfq_handle *h)
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nfqnl_msg_packet_hdr *nfq_get_msg_packet_hdr(nfq_data *nfad)
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int nfq_get_payload(nfq_data *nfad, char **data)
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int nfq_get_timestamp(nfq_data *nfad, timeval *tv)
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nfqnl_msg_packet_hw *nfq_get_packet_hw(nfq_data *nfad)
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# Dummy defines from linux/socket.h:
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cdef enum: # Protocol families, same as address families.
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PF_INET = 2
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PF_INET6 = 10
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cdef extern from "sys/socket.h":
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ssize_t recv(int __fd, void *__buf, size_t __n, int __flags) nogil
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# Dummy defines from linux/netfilter.h
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cdef enum:
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NF_DROP
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NF_ACCEPT
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NF_STOLEN
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NF_QUEUE
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NF_REPEAT
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NF_STOP
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NF_MAX_VERDICT = NF_STOP
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cdef class Packet:
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cdef nfq_q_handle *_qh
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cdef nfq_data *_nfa
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cdef nfqnl_msg_packet_hdr *_hdr
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cdef bint _verdict_is_set # True if verdict has been issued,
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# false otherwise
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cdef bint _mark_is_set # True if a mark has been given, false otherwise
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cdef u_int32_t _given_mark # Mark given to packet
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cdef bytes _given_payload # New payload of packet, or null
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# From NFQ packet header:
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cdef readonly u_int32_t id
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cdef readonly u_int16_t hw_protocol
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cdef readonly u_int8_t hook
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# Packet details:
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cdef Py_ssize_t payload_len
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cdef readonly char *payload
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cdef timeval timestamp
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# TODO: implement these
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#cdef u_int8_t hw_addr[8] # A eui64-formatted address?
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#cdef readonly u_int32_t nfmark
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#cdef readonly u_int32_t indev
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#cdef readonly u_int32_t physindev
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#cdef readonly u_int32_t outdev
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#cdef readonly u_int32_t physoutdev
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cdef set_nfq_data(self, nfq_q_handle *qh, nfq_data *nfa)
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cdef void verdict(self, u_int8_t verdict)
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cpdef Py_ssize_t get_payload_len(self)
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cpdef double get_timestamp(self)
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cpdef set_payload(self, bytes payload)
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cpdef set_mark(self, u_int32_t mark)
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cpdef accept(self)
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cpdef drop(self)
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cpdef repeat(self)
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cdef class NetfilterQueue:
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cdef object user_callback # User callback
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cdef nfq_handle *h # Handle to NFQueue library
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cdef nfq_q_handle *qh # A handle to the queue
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cdef u_int16_t af # Address family
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cdef packet_copy_size # Amount of packet metadata + data copied to buffer
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