# HG changeset patch
# User Roy Marples <roy@marples.name>
# Date 1590652933 -3600
# Node ID b7d18124ad21fca12748eb5aece9a71a785981a8
# Parent  f0c6e0c1d52ac83212fed8de38072f4a2bddf268
DHCP6: Revert part of prior - only allow vendorclassid to disable

Not set.
dhcpcd owns the IANA_PEN defined.
Either use it as is, or get your own.
This restores the prior behaviour but still allows the option
as a whole to be disabled by vendorclassid being disabled.

diff -r f0c6e0c1d52a -r b7d18124ad21 src/dhcp6.c
--- a/src/dhcp6.c	Wed May 27 23:34:16 2020 +0100
+++ b/src/dhcp6.c	Thu May 28 09:02:13 2020 +0100
@@ -274,7 +274,9 @@
 			vlen += sizeof(uint16_t) + vivco->len;
 		len += vlen;
 	} else if (ifo->vendorclassid[0] != '\0') {
-		vlen = (size_t)ifo->vendorclassid[0];
+		/* dhcpcd owns DHCPCD_IANA_PEN.
+		 * If you need your own string, get your own IANA PEN. */
+		vlen = strlen(ifp->ctx->vendor);
 		len += sizeof(uint16_t) + vlen;
 	} else
 		return 0;
@@ -312,7 +314,7 @@
 			hvlen = htons((uint16_t)vlen);
 			memcpy(p, &hvlen, sizeof(hvlen));
 			p += sizeof(hvlen);
-			memcpy(p, ifo->vendorclassid + 1, (size_t)vlen);
+			memcpy(p, ifp->ctx->vendor, vlen);
 		}
 	}