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0
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"""
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Socket addresses
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"""
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cimport libc
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cdef class sockaddr :
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"""
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A network-level socket address
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>>> sockaddr().family
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0
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>>> sockaddr().port
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Traceback (most recent call last):
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...
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NotImplementedError
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>>> sockaddr().getnameinfo()
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Traceback (most recent call last):
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...
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NotImplementedError
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"""
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# address family
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cdef readonly libc.sa_family_t family
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cdef void _init_family (self, libc.sa_family_t family=libc.AF_UNSPEC) :
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self.family = family
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cdef int _get_sockaddr (self, libc.sockaddr **sa_ptr, libc.socklen_t *sa_len) except -1 :
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"""
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Get the sockaddr pointer and sockaddr length for this address
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"""
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raise NotImplementedError()
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def getnameinfo (self) :
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"""
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Returns a (host, serv) tuple for this address à la getnameinfo
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"""
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cdef libc.sockaddr *sa
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cdef libc.socklen_t sa_len
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# XXX: take as args?
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cdef int flags = libc.NI_NUMERICHOST | libc.NI_NUMERICSERV
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# get our abstract sockaddr
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self._get_sockaddr(&sa, &sa_len)
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# get nice text format
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return libc.getnameinfo(sa, sa_len, flags)
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property addr :
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"""
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The ASCII literal network address
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"""
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def __get__ (self) :
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"""
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Default implmentation using getnameinfo()
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"""
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addr, port = self.getnameinfo()
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return addr
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property port :
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"""
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The integer port number
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"""
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def __get__ (self) :
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"""
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Default implementation using getnameinfo() and int()
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"""
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addr, port = self.getnameinfo()
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return int(port)
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cdef class sockaddr_in (sockaddr) :
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"""
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AF_INET struct sockaddr_in
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>>> sa = sockaddr_in("127.0.0.1", 80)
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>>> sa.addr
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'127.0.0.1'
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>>> sa.port
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80
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>>> str(sa)
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'127.0.0.1:80'
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>>> str(sockaddr_in())
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'0.0.0.0:0'
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"""
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# the struct sockaddr_in
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cdef libc.sockaddr_in sockaddr
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def __init__ (self, object addr=None, libc.in_port_t port=0) :
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"""
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Construct using given literal IPv4 address and TCP/UDP port
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addr - IPv4 address, defaults to INADDR_ANY (0.0.0.0)
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port - TCP/UDP port, defaults to 0 (ephemeral)
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"""
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# store our family
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# XXX: this should be a class attribute...
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self._init_family(libc.AF_INET)
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# constant af
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self.sockaddr.sin_family = self.family
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# set the sin_port
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self.sockaddr.sin_port = libc.htons(port)
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if addr :
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# set the sin_addr
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# this automatically converts the addr from str -> char *
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libc.inet_pton(self.family, addr, &self.sockaddr.sin_addr)
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else :
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# set as INADDR_ANY
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self.sockaddr.sin_addr.s_addr = libc.INADDR_ANY
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cdef int _get_sockaddr (self, libc.sockaddr **sa_ptr, libc.socklen_t *sa_len) except -1 :
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if sa_ptr :
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sa_ptr[0] = <libc.sockaddr *> &self.sockaddr
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if sa_len :
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sa_len[0] = sizeof(self.sockaddr)
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return 0
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property port :
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"""
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The integer port number
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"""
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def __get__ (self) :
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return libc.ntohs(self.sockaddr.sin_port)
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def __str__ (self) :
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"""
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Return the literal ASCII representation for this sockaddr as an '<addr>:<port> string
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"""
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# format
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return "%s:%s" % self.getnameinfo()
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cdef class sockaddr_in6 (sockaddr) :
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"""
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AF_INET6 struct sockaddr_in6
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>>> sa6 = sockaddr_in6("::1", 80)
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>>> sa6.addr
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'::1'
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>>> sa6.port
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80
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>>> str(sa6)
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'[::1]:80'
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>>> str(sockaddr_in6())
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'[::]:0'
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"""
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cdef libc.sockaddr_in6 sockaddr
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def __init__ (self, object addr=None, libc.in_port_t port=0) :
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"""
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Construct using given literal IPv6 address and TCP/UDP port
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addr - IPv6 address, defaults to in6addr_any (::)
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port - TCP/UDP port, defaults to 0 (ephemeral)
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"""
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# store our family
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# XXX: this should be a class attribute...
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self._init_family(libc.AF_INET6)
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# constant af
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self.sockaddr.sin6_family = self.family
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# set the sin_port
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self.sockaddr.sin6_port = libc.htons(port)
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if addr :
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# set the sin_addr
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# this automatically converts the addr from str -> char *
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libc.inet_pton(self.family, addr, &self.sockaddr.sin6_addr)
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else :
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# set as INADDR_ANY
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self.sockaddr.sin6_addr = libc.in6addr_any
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cdef int _get_sockaddr (self, libc.sockaddr **sa_ptr, libc.socklen_t *sa_len) except -1 :
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if sa_ptr :
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sa_ptr[0] = <libc.sockaddr *> &self.sockaddr
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198 |
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199 |
if sa_len :
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sa_len[0] = sizeof(self.sockaddr)
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return 0
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203 |
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204 |
property port :
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205 |
"""
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206 |
The integer port number
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"""
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208 |
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209 |
def __get__ (self) :
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return libc.ntohs(self.sockaddr.sin6_port)
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211 |
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212 |
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def __str__ (self) :
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214 |
"""
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215 |
Return the literal ASCII representation for this sockaddr as a '[<addr>]:<port> string
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216 |
"""
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217 |
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218 |
# format
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219 |
return "[%s]:%s" % self.getnameinfo()
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220 |
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