Simple Access Control Lists.
Access control lists are composed of “allow” and “deny” halves to control access. Use “all” or “*” to match any address. To match a specific address use any address or address mask that IPAddr can understand.
Example:
list = %w[ deny all allow 192.168.1.1 allow ::ffff:192.168.1.2 allow 192.168.1.3 ] # From Socket#peeraddr, see also ACL#allow_socket? addr = ["AF_INET", 10, "lc630", "192.168.1.3"] acl = ACL.new p acl.allow_addr?(addr) # => true acl = ACL.new(list, ACL::DENY_ALLOW) p acl.allow_addr?(addr) # => true
Default to allow
Default to deny
The current version of ACL
# File lib/drb/acl.rb, line 179 def initialize(list=nil, order = DENY_ALLOW) @order = order @deny = ACLList.new @allow = ACLList.new install_list(list) if list end
Creates a new ACL from list with an evaluation order of DENY_ALLOW or ALLOW_DENY.
An ACL list is an Array of “allow” or “deny” and an address or address mask or “all” or “*” to match any address:
%w[ deny all allow 192.0.2.2 allow 192.0.2.128/26 ]
# File lib/drb/acl.rb, line 203
def allow_addr?(addr)
case @order
when DENY_ALLOW
return true if @allow.match(addr)
return false if @deny.match(addr)
return true
when ALLOW_DENY
return false if @deny.match(addr)
return true if @allow.match(addr)
return false
else
false
end
end Allow connections from addrinfo addr? It must be formatted like Socket#peeraddr:
["AF_INET", 10, "lc630", "192.0.2.1"]
# File lib/drb/acl.rb, line 191 def allow_socket?(soc) allow_addr?(soc.peeraddr) end
Allow connections from Socket soc?
# File lib/drb/acl.rb, line 223
def install_list(list)
i = 0
while i < list.size
permission, domain = list.slice(i,2)
case permission.downcase
when 'allow'
@allow.add(domain)
when 'deny'
@deny.add(domain)
else
raise "Invalid ACL entry #{list}"
end
i += 2
end
end
Ruby Core © 1993–2020 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.