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[master] Ignore empty host name option when parsing v4 packets

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Merges in rt43786
This commit is contained in:
Thomas Markwalder
2017-11-27 13:50:02 -05:00
parent 83f1dd956c
commit 2d542e1ecf
2 changed files with 16 additions and 0 deletions
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10
common/options.c
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@@ -202,6 +202,16 @@ int parse_option_buffer (options, buffer, length, universe)
universe, NULL);
}
if (universe == &dhcp_universe && code == DHO_HOST_NAME &&
len == 0) {
/* non-compliant clients can send it
* we'll just drop it and go on */
log_debug ("Ignoring empty DHO_HOST_NAME option");
option_dereference(&option, MDL);
offset += len;
continue;
}
op = lookup_option(universe, options, code);
if (op == NULL) {
/* If we don't have an option create one */