As defined by https://tools.ietf.org/html/rfc4191, prompted by
http://marc.info/?l=openbsd-misc&m=146239072929264&w=2
"pref" is inspired by upstream tcpdump format.
Thoughts / ok?
Index: print-icmp6.c
===================================================================
RCS file: /cvs/src/usr.sbin/tcpdump/print-icmp6.c,v
retrieving revision 1.18
diff -u -p -p -u -r1.18 print-icmp6.c
--- print-icmp6.c 15 Mar 2016 05:03:11 -0000 1.18
+++ print-icmp6.c 6 May 2016 11:55:20 -0000
@@ -305,8 +305,24 @@ icmp6_print(const u_char *bp, u_int leng
printf("M");
if (p->nd_ra_flags_reserved & ND_RA_FLAG_OTHER)
printf("O");
- if (p->nd_ra_flags_reserved != 0)
- printf(" ");
+ if (p->nd_ra_flags_reserved &
+ (ND_RA_FLAG_MANAGED|ND_RA_FLAG_OTHER))
+ printf(", ");
+ switch (p->nd_ra_flags_reserved
+ & ND_RA_FLAG_RTPREF_MASK) {
+ case ND_RA_FLAG_RTPREF_HIGH:
+ printf("pref=high, ");
+ break;
+ case ND_RA_FLAG_RTPREF_MEDIUM:
+ printf("pref=medium, ");
+ break;
+ case ND_RA_FLAG_RTPREF_LOW:
+ printf("pref=low, ");
+ break;
+ case ND_RA_FLAG_RTPREF_RSV:
+ printf("pref=rsv, ");
+ break;
+ }
printf("router_ltime=%d, ",
ntohs(p->nd_ra_router_lifetime));
printf("reachable_time=%u, ",
(u_int32_t)ntohl(p->nd_ra_reachable));
--
jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
