author | Tero Marttila <terom@fixme.fi> |
Fri, 25 Sep 2009 21:34:04 +0300 | |
changeset 49 | e2f79e68418a |
parent 24 | f18b5787c46c |
permissions | -rw-r--r-- |
24
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1 |
""" |
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2 |
This C(ython) extension module provides an interface to the libsctp library and associated socket API. |
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|
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4 |
>>> from __future__ import absolute_import; |
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5 |
>>> from qmsk.net.socket.af_inet import sockaddr_in |
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>>> from qmsk.net.socket.constants import * |
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7 |
>>> s = sctp_socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP) |
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>>> s.sctp_bindx([sockaddr_in('127.0.0.1', 1337), sockaddr_in('127.0.0.2')], 0x01) |
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>>> |
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|
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11 |
""" |
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|
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13 |
from qmsk.net.socket.address cimport sockaddr |
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|
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cimport qmsk.net.socket.platform as platform |
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cimport qmsk.net.libc as libc |
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|
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from qmsk.net.py cimport raise_errno |
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|
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cdef size_t addrsoup_len (object addrs) except -1 : |
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21 |
""" |
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22 |
Calculate the length of the addr_buf required to store the given addrsoup |
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23 |
""" |
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cdef sockaddr addr |
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cdef size_t addr_size = 0 |
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|
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# whoever decided that sctp_bindx takes an array of mixed sockaddr_in/sockaddr_in6's should be shot |
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for addr in addrs : |
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addr_size += addr._get_sockaddr_len() |
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|
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return addr_size |
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|
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cdef addrsoup_store (object addrs, char *addr_buf) : |
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""" |
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Store the sockaddr_*'s for the given addresses into the given buffer, which should be addrsoup_len() bytes long |
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""" |
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cdef sockaddr addr |
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cdef char *addr_ptr = addr_buf |
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|
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# fill it |
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cdef platform.sockaddr *sa |
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cdef platform.socklen_t sa_len |
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|
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for addr in addrs : |
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# get address's sockaddr info |
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addr._get_sockaddr(&sa, &sa_len) |
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# copy to buffer |
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libc.memcpy(addr_ptr, sa, sa_len) |
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|
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# move to next |
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addr_ptr += sa_len |
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|
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cdef class sctp_socket (socket.socket) : |
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def __init__ (self, int family = platform.AF_INET, int socktype = platform.SOCK_SEQPACKET, int protocol = IPPROTO_SCTP, int fd = -1) : |
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""" |
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Same behaviour as socket.__init__, but different defaults. |
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""" |
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|
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socket.socket.__init__(self, family, socktype, protocol, fd) |
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def sctp_bindx (self, object addrs, int flags) : |
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""" |
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Bind this IPPROTO_SCTP socket to the given set of local addresses. |
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|
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This may be called multiple times on a socket, even after bind(), to change the set of local addresses. |
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This may affect ongoing associations, or only new associations. |
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|
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addresses the list of sockaddr's |
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flags one of SCTP_BINDX_ADD/REM_ADDR |
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|
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""" |
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|
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# ensure that addrs stays the same... ? |
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addrs = tuple(addrs) |
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|
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# alloc buffer to hold all the sockaddr_*'s |
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cdef char *addr_buf = <char *> libc.alloca(addrsoup_len(addrs)) |
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|
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# store |
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addrsoup_store(addrs, addr_buf) |
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|
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# then call |
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if sctp_bindx(self.fd, <platform.sockaddr *> addr_buf, len(addrs), flags) : |
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raise_errno('sctp_bindx') |
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|
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def sctp_connectx (self, int sd, object addrs) : |
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""" |
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Establish an association with the given set of remote sockaddr's. |
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|
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addresses the list of sockaddr's |
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|
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""" |
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|
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# ensure that addrs stays the same... ? |
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addrs = tuple(addrs) |
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|
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# alloc buffer to hold all the sockaddr_*'s |
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102 |
cdef char *addr_buf = <char *> libc.alloca(addrsoup_len(addrs)) |
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parents:
diff
changeset
|
103 |
|
f18b5787c46c
reorganize socket, adding af_inet/af_inet6 modules, and moving sctp in
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
104 |
# store |
f18b5787c46c
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Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
105 |
addrsoup_store(addrs, addr_buf) |
f18b5787c46c
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Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
106 |
|
f18b5787c46c
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Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
107 |
# then call |
f18b5787c46c
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Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
108 |
if sctp_connectx(self.fd, <platform.sockaddr *> addr_buf, len(addrs)) : |
f18b5787c46c
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parents:
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|
109 |
raise_errno('sctp_connectx') |
f18b5787c46c
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parents:
diff
changeset
|
110 |
|
f18b5787c46c
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Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
111 |