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Cope with duplicate dhcp-options with tags (last one wins).

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Simon Kelley
2013-04-02 21:35:41 +01:00
parent 49dc570a72
commit 96c727fda6
1 changed files with 8 additions and 1 deletions
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9
src/dhcp-common.c
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@@ -91,6 +91,7 @@ struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *con
{
struct dhcp_netid *tagif = run_tag_if(tags);
struct dhcp_opt *opt;
struct dhcp_opt *tmp;
/* flag options which are valid with the current tag set (sans context tags) */
for (opt = opts; opt; opt = opt->next)
@@ -135,7 +136,6 @@ struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *con
for (opt = opts; opt; opt = opt->next)
if (!(opt->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925 | DHOPT_TAGOK)) && !opt->netid)
{
struct dhcp_opt *tmp;
for (tmp = opts; tmp; tmp = tmp->next)
if (tmp->opt == opt->opt && (tmp->flags & DHOPT_TAGOK))
break;
@@ -145,6 +145,13 @@ struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *con
my_syslog(MS_DHCP | LOG_WARNING, _("Ignoring duplicate dhcp-option %d"), tmp->opt);
}
/* Finally, eliminate duplicate options later in the chain, and therefore earlier in the config file. */
for (opt = opts; opt; opt = opt->next)
if (opt->flags & DHOPT_TAGOK)
for (tmp = opt->next; tmp; tmp = tmp->next)
if (tmp->opt == opt->opt)
tmp->flags &= ~DHOPT_TAGOK;
return tagif;
}