Add a comment to describe why we deny the ability to assign prefixes

to the requesting interface [ac7063e671].

diff --git a/if-options.c b/if-options.c
index a2345c9d3ba32bbfcac673d0fb6052be884b0abe..dc39f0a7467a6c3f4f1806b6f7ad038dc6db4be7 100644 (file)
--- a/if-options.c
+++ b/if-options.c
@@ -1322,6 +1322,13 @@ parse_option(struct dhcpcd_ctx *ctx, const char *ifname, struct if_options *ifo,
                        np = strchr(p, '/');
                        if (np)
                                *np++ = '\0';
+                       /*
+                        * RFC3633 12.1
+                        * the requesting router MUST NOT assign any delegated
+                        * prefixes or subnets from the delegated prefix(es) to
+                        * the link through which it received the DHCP message
+                        * from the delegating router.
+                        */
                        if (strcmp(ifname, p) == 0) {
                                syslog(LOG_ERR,
                                    "%s: cannot assign IA_PD to itself",