def sockaddr(host, port, network = 'ipv4'):
"""sockaddr(host, port, network = 'ipv4') -> tuple
Creates a sockaddr_in or sockaddr_in6 memory buffer for use in shellcode.
Arguments:
host (str): Either an IP address or a hostname to be looked up.
port (int): TCP/UDP port.
network (str): Either 'ipv4' or 'ipv6'.
Returns:
A tuple containing the sockaddr buffer and the address family.
"""
address_family = {'ipv4':socket.AF_INET,'ipv6':socket.AF_INET6}[network]
info = socket.getaddrinfo(host, None, address_family)
host = socket.inet_pton(address_family, info[0][4][0])
sockaddr = p16(address_family)
sockaddr += p16(socket.htons(port))
if network == 'ipv4':
sockaddr += host
sockaddr = sockaddr.ljust(16, '\x00')
else:
sockaddr += p32(0)
sockaddr += host
sockaddr += p32(0)
return (sockaddr, address_family)
def sockaddr(host, port, network='ipv4'):
"""sockaddr(host, port, network = 'ipv4') -> tuple
Creates a sockaddr_in or sockaddr_in6 memory buffer for use in shellcode.
Arguments:
host (str): Either an IP address or a hostname to be looked up.
port (int): TCP/UDP port.
network (str): Either 'ipv4' or 'ipv6'.
Returns:
A tuple containing the sockaddr buffer and the address family.
"""
address_family = {'ipv4': socket.AF_INET, 'ipv6': socket.AF_INET6}[network]
info = socket.getaddrinfo(host, None, address_family)
host = socket.inet_pton(address_family, info[0][4][0])
sockaddr = p16(address_family)
sockaddr += p16(socket.htons(port))
if network == 'ipv4':
sockaddr += host
sockaddr = sockaddr.ljust(16, '\x00')
else:
sockaddr += p32(0)
sockaddr += host
sockaddr += p32(0)
return (sockaddr, address_family)
def sockaddr(host, port, network='ipv4'):
"""sockaddr(host, port, network = 'ipv4') -> (data, length, family)
Creates a sockaddr_in or sockaddr_in6 memory buffer for use in shellcode.
Arguments:
host (str): Either an IP address or a hostname to be looked up.
port (int): TCP/UDP port.
network (str): Either 'ipv4' or 'ipv6'.
Returns:
A tuple containing the sockaddr buffer, length, and the address family.
"""
address_family = {'ipv4': socket.AF_INET, 'ipv6': socket.AF_INET6}[network]
for family, _, _, _, ip in socket.getaddrinfo(host, None, address_family):
ip = ip[0]
if family == address_family:
break
else:
log.error("Could not find %s address for %r" % (network, host))
info = socket.getaddrinfo(host, None, address_family)
host = socket.inet_pton(address_family, ip)
sockaddr = p16(address_family)
sockaddr += pack(
port, word_size=16,
endianness='big') #Port should be big endian = network byte order
length = 0
if network == 'ipv4':
sockaddr += host
length = 16 # Save ten bytes by skipping two 'push 0'
else:
sockaddr += p32(0xffffffff) # Save three bytes 'push -1' vs 'push 0'
sockaddr += host
length = len(sockaddr) + 4 # Save five bytes 'push 0'
return (sockaddr, length, address_family)
def sockaddr(host, port, network = 'ipv4'):
"""sockaddr(host, port, network = 'ipv4') -> (data, length, family)
Creates a sockaddr_in or sockaddr_in6 memory buffer for use in shellcode.
Arguments:
host (str): Either an IP address or a hostname to be looked up.
port (int): TCP/UDP port.
network (str): Either 'ipv4' or 'ipv6'.
Returns:
A tuple containing the sockaddr buffer, length, and the address family.
"""
address_family = {'ipv4':socket.AF_INET,'ipv6':socket.AF_INET6}[network]
for family, _, _, _, ip in socket.getaddrinfo(host, None, address_family):
ip = ip[0]
if family == address_family:
break
else:
log.error("Could not find %s address for %r" % (network, host))
info = socket.getaddrinfo(host, None, address_family)
host = socket.inet_pton(address_family, ip)
sockaddr = p16(address_family)
sockaddr += pack(port, word_size = 16, endianness = 'big') #Port should be big endian = network byte order
length = 0
if network == 'ipv4':
sockaddr += host
length = 16 # Save ten bytes by skipping two 'push 0'
else:
sockaddr += p32(0xffffffff) # Save three bytes 'push -1' vs 'push 0'
sockaddr += host
length = len(sockaddr) + 4 # Save five bytes 'push 0'
return (sockaddr, length, address_family)