From: Roger Shimizu <rosh@debian.org>

Date: Sun, 6 Sep 2020 14:34:36 +0900

Subject: Make sla-len config optional

Cherry-pick from Fedora:

https://src.fedoraproject.org/rpms/wide-dhcpv6/blob/master/f/wide-dhcpv6-0008-Make-sla-len-config-optional.patch

---

 prefixconf.c | 11 +++++++++++

 1 file changed, 11 insertions(+)

diff --git a/prefixconf.c b/prefixconf.c

index 15b5417..98d9b77 100644

--- a/prefixconf.c

+++ b/prefixconf.c

@@ -460,6 +460,17 @@ add_ifprefix(siteprefix, prefix, pconf)

 	ifpfx->paddr.sin6_len = sizeof(struct sockaddr_in6);

 #endif

 	ifpfx->paddr.sin6_addr = prefix->addr;

+

+	/*

+         * dave (bevhost) thinks this should fix it rather than

+         * generare the error below "invalid prefix length"

+         * this way the sla-len can be left out of the config file

+         * and calculated when the prefix is received

+         */

+	if (prefix->plen + pconf->ifid_len + pconf->sla_len > 128) {

+		pconf->sla_len = 128 - pconf->ifid_len - prefix->plen;

+	}

+

 	ifpfx->plen = prefix->plen + pconf->sla_len;

 	/*

 	 * XXX: our current implementation assumes ifid len is a multiple of 8