From 14580e78e58afbab1143a57b00f9647cde6501bf Mon Sep 17 00:00:00 2001 From: Franco Fichtner Date: Fri, 24 Mar 2017 08:22:27 +0100 Subject: [PATCH] dhclient: support supersede statement for option 54 Submitted by: Fabian Kurtz --- sbin/dhclient/dhclient.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/sbin/dhclient/dhclient.c b/sbin/dhclient/dhclient.c index b68f63660bf..2b2f5993fc9 100644 --- a/sbin/dhclient/dhclient.c +++ b/sbin/dhclient/dhclient.c @@ -862,6 +862,8 @@ void state_bound(void *ipp) { struct interface_info *ip = ipp; + u_int8_t *dp = NULL; + int len; ASSERT_STATE(state, S_BOUND); @@ -869,10 +871,17 @@ state_bound(void *ipp) make_request(ip, ip->client->active); ip->client->xid = ip->client->packet.xid; - if (ip->client->active->options[DHO_DHCP_SERVER_IDENTIFIER].len == 4) { - memcpy(ip->client->destination.iabuf, ip->client->active-> - options[DHO_DHCP_SERVER_IDENTIFIER].data, 4); - ip->client->destination.len = 4; + if (ip->client->config->default_actions[DHO_DHCP_SERVER_IDENTIFIER] == + ACTION_SUPERSEDE) { + dp = ip->client->config->defaults[DHO_DHCP_SERVER_IDENTIFIER].data; + len = ip->client->config->defaults[DHO_DHCP_SERVER_IDENTIFIER].len; + } else { + dp = ip->client->active->options[DHO_DHCP_SERVER_IDENTIFIER].data; + len = ip->client->active->options[DHO_DHCP_SERVER_IDENTIFIER].len; + } + if (len == 4) { + memcpy(ip->client->destination.iabuf, dp, len); + ip->client->destination.len = len; } else ip->client->destination = iaddr_broadcast;