diff options
| author |   jca <jca@openbsd.org> | 2016-05-07 19:36:45 +0000 |
|---|---|---|
| committer | jca <jca@openbsd.org> | 2016-05-07 19:36:45 +0000 |
| commit | 62675c530f8c62f03187ae088ae4762106ae6ac0 (patch) | |
| tree | 508a9c46b92042cf624866ef969f3ecd673e5aed /usr.sbin/tcpdump/print-icmp6.c | |
| parent | Replace .Po/.Pc with .Pq, and drop extra .Li; suggested by jmc@ (diff) | |
| download | wireguard-openbsd-62675c530f8c62f03187ae088ae4762106ae6ac0.tar.xz wireguard-openbsd-62675c530f8c62f03187ae088ae4762106ae6ac0.zip | |
Print RA Route Information prefix, preference and lifetime.
ok mpi@
Diffstat (limited to 'usr.sbin/tcpdump/print-icmp6.c')
| -rw-r--r-- | usr.sbin/tcpdump/print-icmp6.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/usr.sbin/tcpdump/print-icmp6.c b/usr.sbin/tcpdump/print-icmp6.c index aaea4d4d308..4e8caed0294 100644 --- a/usr.sbin/tcpdump/print-icmp6.c +++ b/usr.sbin/tcpdump/print-icmp6.c @@ -1,4 +1,4 @@ -/* $OpenBSD: print-icmp6.c,v 1.19 2016/05/06 17:16:24 jca Exp $ */ +/* $OpenBSD: print-icmp6.c,v 1.20 2016/05/07 19:36:45 jca Exp $ */ /* * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 @@ -526,7 +526,10 @@ icmp6_opt_print(const u_char *bp, int resid) const struct icmp6_opts_redirect *opr; const struct nd_opt_mtu *opm; const struct nd_opt_rdnss *oprd; + const struct nd_opt_route_info *opri; const u_char *ep; + const struct in6_addr *in6p; + struct in6_addr in6; int i, opts_len; #if 0 const struct ip6_hdr *ip; @@ -642,7 +645,43 @@ icmp6_opt_print(const u_char *bp, int resid) resid - (op->nd_opt_len << 3)); break; case ND_OPT_ROUTE_INFO: - printf("(route-info: opt_len=%d)", op->nd_opt_len); + opri = (struct nd_opt_route_info *)op; + TCHECK(opri->nd_opt_rti_lifetime); + printf("(route-info: "); + memset(&in6, 0, sizeof(in6)); + in6p = (const struct in6_addr *)(opri + 1); + switch (op->nd_opt_len) { + case 1: + break; + case 2: + TCHECK2(*in6p, 8); + memcpy(&in6, opri + 1, 8); + break; + case 3: + TCHECK(*in6p); + memcpy(&in6, opri + 1, sizeof(in6)); + break; + default: + goto trunc; + } + printf("%s/%u, ", ip6addr_string(&in6), + opri->nd_opt_rti_prefixlen); + switch (opri->nd_opt_rti_flags & 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("lifetime=%us)", + (u_int32_t)ntohl(opri->nd_opt_rti_lifetime)); icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), resid - (op->nd_opt_len << 3)); break; |