/usr/share/selinux/ubuntu/include/support/ipc_patterns.spt is in selinux-policy-ubuntu-dev 0.2.20091117-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# unix domain socket patterns
#
define(`stream_connect_pattern',`
allow $1 $2:dir search_dir_perms;
allow $1 $3:sock_file write_sock_file_perms;
allow $1 $4:unix_stream_socket connectto;
')
define(`dgram_send_pattern',`
allow $1 $2:dir search_dir_perms;
allow $1 $3:sock_file write_sock_file_perms;
allow $1 $4:unix_dgram_socket sendto;
')
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