| Subject: | [Infoblox] DHCP Bug in parsing options with encapsulated values |
Ramesh Damodaran (of Infoblox) writes, on Support #8404:
The parse_option_buffer() function in options.c fails
to add options with encapsulated values to the dhcp
namespace. Option 82, relay-agent-information, is one
such option that send encapsulated values. The sub-options
within the encapsulated value are correctly added to
the appropriate option universe but the main option is
not added to the dhcp universe. In the case of option 82
the sub-options are added to the agent option universe.
This bug prevents classes with match statements such
as 'if (exists relay-agent-information)' from correctly
identifying clients that sent requests with the
relay-agent-information option included. In all cases
the clients are treated as if they did not send the
relay-agent-information option.
My proposed fix is to add an else clause that calls
save_option_buffer() to the if statement starting on
line 194 in common/options.c. Here's a diff with the
proposed fix:
--- options.c 2015-06-19 14:25:41.837564075 -0700
+++ options.c.fixed 2015-06-19 14:26:19.700626162 -0700
@@ -256,6 +256,10 @@
}
}
}
+ else {
+ save_option_buffer(universe, options, bp, bp->data + offset, len, code, 1);
+ }
+
option_dereference(&option, MDL);
offset += len;
}
I've tested this and classes that failed to match relay-agent-information options now work.