210 lines
5.9 KiB
Cython
210 lines
5.9 KiB
Cython
cdef extern from "sys/types.h":
|
|
ctypedef unsigned char u_int8_t
|
|
ctypedef unsigned short int u_int16_t
|
|
ctypedef unsigned int u_int32_t
|
|
|
|
cdef extern from "<errno.h>":
|
|
int errno
|
|
|
|
# dummy defines from asm-generic/errno.h:
|
|
cdef enum:
|
|
EAGAIN = 11 # Try again
|
|
EWOULDBLOCK = EAGAIN
|
|
ENOBUFS = 105 # No buffer space available
|
|
|
|
# cython define
|
|
cdef extern from "netinet/ip.h":
|
|
struct iphdr:
|
|
u_int8_t tos
|
|
u_int16_t tot_len
|
|
u_int16_t id
|
|
u_int16_t frag_off
|
|
u_int8_t ttl
|
|
u_int8_t protocol
|
|
u_int16_t check
|
|
u_int32_t saddr
|
|
u_int32_t daddr
|
|
|
|
# cython define
|
|
cdef extern from "netinet/tcp.h":
|
|
struct tcphdr:
|
|
u_int16_t th_sport
|
|
u_int16_t th_dport
|
|
u_int32_t th_seq
|
|
u_int32_t th_ack
|
|
|
|
u_int8_t th_x2
|
|
u_int8_t th_off
|
|
|
|
u_int8_t th_flags
|
|
|
|
u_int16_t th_win
|
|
u_int16_t th_sum
|
|
u_int16_t th_urp
|
|
|
|
# cython define
|
|
cdef extern from "netinet/udp.h":
|
|
struct udphdr:
|
|
u_int16_t uh_sport
|
|
u_int16_t uh_dport
|
|
u_int16_t uh_ulen
|
|
u_int16_t uh_sum
|
|
|
|
cdef struct icmphdr:
|
|
u_int8_t type
|
|
|
|
# from netinet/in.h:
|
|
cdef enum:
|
|
IPPROTO_IP = 0 # Dummy protocol for TCP.
|
|
IPPROTO_ICMP = 1 # Internet Control Message Protocol.
|
|
IPPROTO_TCP = 6 # Transmission Control Protocol.
|
|
IPPROTO_UDP = 17 # User Datagram Protocol.
|
|
|
|
cdef extern from "Python.h":
|
|
object PyBytes_FromStringAndSize(char *s, Py_ssize_t len)
|
|
object PyString_FromStringAndSize(char *s, Py_ssize_t len)
|
|
|
|
cdef extern from "sys/time.h":
|
|
ctypedef long time_t
|
|
struct timeval:
|
|
time_t tv_sec
|
|
time_t tv_usec
|
|
struct timezone:
|
|
pass
|
|
|
|
cdef extern from "netinet/in.h":
|
|
u_int32_t ntohl (u_int32_t __netlong) nogil
|
|
u_int16_t ntohs (u_int16_t __netshort) nogil
|
|
u_int32_t htonl (u_int32_t __hostlong) nogil
|
|
u_int16_t htons (u_int16_t __hostshort) nogil
|
|
|
|
cdef extern from "libnfnetlink/linux_nfnetlink.h":
|
|
struct nfgenmsg:
|
|
u_int8_t nfgen_family
|
|
u_int8_t version
|
|
u_int16_t res_id
|
|
|
|
cdef extern from "libnfnetlink/libnfnetlink.h":
|
|
struct nfnl_handle:
|
|
pass
|
|
unsigned int nfnl_rcvbufsiz(nfnl_handle *h, unsigned int size)
|
|
|
|
cdef extern from "libnetfilter_queue/linux_nfnetlink_queue.h":
|
|
enum nfqnl_config_mode:
|
|
NFQNL_COPY_NONE
|
|
NFQNL_COPY_META
|
|
NFQNL_COPY_PACKET
|
|
struct nfqnl_msg_packet_hdr:
|
|
u_int32_t packet_id
|
|
u_int16_t hw_protocol
|
|
u_int8_t hook
|
|
|
|
cdef extern from "libnetfilter_queue/libnetfilter_queue.h":
|
|
struct nfq_handle:
|
|
pass
|
|
struct nfq_q_handle:
|
|
pass
|
|
struct nfq_data:
|
|
pass
|
|
struct nfqnl_msg_packet_hw:
|
|
u_int8_t hw_addr[8]
|
|
|
|
nfq_handle *nfq_open()
|
|
int nfq_close(nfq_handle *h)
|
|
|
|
int nfq_bind_pf(nfq_handle *h, u_int16_t pf)
|
|
int nfq_unbind_pf(nfq_handle *h, u_int16_t pf)
|
|
ctypedef int *nfq_callback(nfq_q_handle *gh, nfgenmsg *nfmsg,
|
|
nfq_data *nfad, void *data)
|
|
nfq_q_handle *nfq_create_queue(nfq_handle *h,
|
|
u_int16_t num,
|
|
nfq_callback *cb,
|
|
void *data)
|
|
int nfq_destroy_queue(nfq_q_handle *qh)
|
|
|
|
int nfq_handle_packet(nfq_handle *h, char *buf, int len)
|
|
|
|
int nfq_set_mode(nfq_q_handle *qh,
|
|
u_int8_t mode, unsigned int len)
|
|
|
|
q_set_queue_maxlen(nfq_q_handle *qh,
|
|
u_int32_t queuelen)
|
|
|
|
int nfq_set_verdict(nfq_q_handle *qh,
|
|
u_int32_t id,
|
|
u_int32_t verdict,
|
|
u_int32_t data_len,
|
|
unsigned char *buf) nogil
|
|
|
|
int nfq_set_verdict2(nfq_q_handle *qh,
|
|
u_int32_t id,
|
|
u_int32_t verdict,
|
|
u_int32_t mark,
|
|
u_int32_t datalen,
|
|
unsigned char *buf) nogil
|
|
int nfq_set_queue_maxlen(nfq_q_handle *qh, u_int32_t queuelen)
|
|
|
|
int nfq_fd(nfq_handle *h)
|
|
nfqnl_msg_packet_hdr *nfq_get_msg_packet_hdr(nfq_data *nfad) nogil
|
|
int nfq_get_payload(nfq_data *nfad, unsigned char **data) nogil
|
|
int nfq_get_timestamp(nfq_data *nfad, timeval *tv) nogil
|
|
nfqnl_msg_packet_hw *nfq_get_packet_hw(nfq_data *nfad)
|
|
int nfq_get_nfmark (nfq_data *nfad) nogil
|
|
u_int8_t nfq_get_indev(nfq_data *nfad)
|
|
u_int8_t nfq_get_outdev(nfq_data *nfad)
|
|
nfnl_handle *nfq_nfnlh(nfq_handle *h)
|
|
|
|
# Dummy defines from linux/socket.h:
|
|
cdef enum: # Protocol families, same as address families.
|
|
PF_INET = 2
|
|
PF_INET6 = 10
|
|
|
|
cdef extern from "sys/socket.h":
|
|
ssize_t recv(int __fd, void *__buf, size_t __n, int __flags) nogil
|
|
int MSG_DONTWAIT
|
|
|
|
# Dummy defines from linux/netfilter.h
|
|
cdef enum:
|
|
NF_DROP
|
|
NF_ACCEPT
|
|
NF_STOLEN
|
|
NF_QUEUE
|
|
NF_REPEAT
|
|
NF_STOP
|
|
NF_MAX_VERDICT = NF_STOP
|
|
|
|
|
|
cdef class CPacket:
|
|
cdef nfq_q_handle *_qh
|
|
cdef nfq_data *_nfa
|
|
cdef nfqnl_msg_packet_hdr *_hdr
|
|
cdef nfqnl_msg_packet_hw *_hw
|
|
|
|
# protocol headers
|
|
cdef iphdr *ip_header
|
|
cdef tcphdr *tcp_header
|
|
cdef udphdr *udp_header
|
|
cdef icmphdr *icmp_header
|
|
|
|
# cdef u_int16_t __queue_num
|
|
# cdef bint threaded
|
|
|
|
cdef bint _verdict_is_set
|
|
cdef u_int32_t _mark
|
|
|
|
# Packet details:
|
|
cdef Py_ssize_t data_len
|
|
cdef readonly unsigned char *data
|
|
cdef timeval timestamp
|
|
cdef u_int8_t hw_addr[8]
|
|
|
|
cdef void parse(self, nfq_q_handle *qh, nfq_data *nfa) nogil
|
|
cdef void _parse(self) nogil
|
|
cdef void verdict(self, u_int32_t verdict)
|
|
|
|
cdef class NetfilterQueue:
|
|
cdef object user_callback # User callback
|
|
cdef nfq_handle *h # Handle to NFQueue library
|
|
cdef nfq_q_handle *qh # A handle to the queue
|
|
cdef u_int16_t af # Address family
|
|
cdef packet_copy_size # Amount of packet metadata + data copied to buffer |