git: 663441de575d - stable/12 - dhclient: support supersede statement for option 54
Kevin Bowling
kbowling at FreeBSD.org
Thu Aug 26 00:03:19 UTC 2021
The branch stable/12 has been updated by kbowling (ports committer):
URL: https://cgit.FreeBSD.org/src/commit/?id=663441de575dbdd38275d298ba220a4dc871f14b
commit 663441de575dbdd38275d298ba220a4dc871f14b
Author: Fabian Kurtz <fabian.kurtz at udo.edu>
AuthorDate: 2021-08-18 17:12:48 +0000
Commit: Kevin Bowling <kbowling at FreeBSD.org>
CommitDate: 2021-08-26 00:02:21 +0000
dhclient: support supersede statement for option 54
PR: 217978
Reported by: Franco Fichtner <franco at opnsense.org>
Reviewed by: markj
Obtained from: OPNsense
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31503
(cherry picked from commit 0a539a0f005e8acbe4974ede30aa928099c988b9)
---
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 4108405d99b0..628490874e69 100644
--- a/sbin/dhclient/dhclient.c
+++ b/sbin/dhclient/dhclient.c
@@ -923,6 +923,8 @@ void
state_bound(void *ipp)
{
struct interface_info *ip = ipp;
+ u_int8_t *dp = NULL;
+ int len;
ASSERT_STATE(state, S_BOUND);
@@ -930,10 +932,17 @@ 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;
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