diff options
| author |   claudio <claudio@openbsd.org> | 2010-10-07 12:34:15 +0000 |
|---|---|---|
| committer | claudio <claudio@openbsd.org> | 2010-10-07 12:34:15 +0000 |
| commit | 1d407297424dca6adacddd08a9c4f9ab99c401e6 (patch) | |
| tree | 48df214b8b79355711b2619e37c79e716c02565c /sys/netmpls | |
| parent | nroff doesn't like long argument lists that work fine with mandoc. (diff) | |
| download | wireguard-openbsd-1d407297424dca6adacddd08a9c4f9ab99c401e6.tar.xz wireguard-openbsd-1d407297424dca6adacddd08a9c4f9ab99c401e6.zip | |
Handle IMPLNULL labels (#3) directly in the kernel like we do with the
explicit NULL labels. IMPLNULL labels should never ever be seen on the
wire but we're realists. michele@ agrees
Diffstat (limited to 'sys/netmpls')
| -rw-r--r-- | sys/netmpls/mpls_input.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/sys/netmpls/mpls_input.c b/sys/netmpls/mpls_input.c index 1c6df4a288c..9f162321d27 100644 --- a/sys/netmpls/mpls_input.c +++ b/sys/netmpls/mpls_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mpls_input.c,v 1.29 2010/09/13 10:02:49 claudio Exp $ */ +/* $OpenBSD: mpls_input.c,v 1.30 2010/10/07 12:34:15 claudio Exp $ */ /* * Copyright (c) 2008 Claudio Jeker <claudio@openbsd.org> @@ -161,6 +161,7 @@ mpls_input(struct mbuf *m) * to be at the beginning of the stack. */ if (hasbos) { +do_v4: if (mpls_ip_adjttl(m, ttl)) goto done; s = splnet(); @@ -168,10 +169,11 @@ mpls_input(struct mbuf *m) schednetisr(NETISR_IP); splx(s); goto done; - } else - continue; + } + continue; case MPLS_LABEL_IPV6NULL: if (hasbos) { +do_v6: if (mpls_ip6_adjttl(m, ttl)) goto done; s = splnet(); @@ -179,13 +181,26 @@ mpls_input(struct mbuf *m) schednetisr(NETISR_IPV6); splx(s); goto done; - } else - continue; + } + continue; + case MPLS_LABEL_IMPLNULL: + if (hasbos) { + switch (*mtod(m, u_char *) >> 4) { + case IPVERSION: + goto do_v4; + case IPV6_VERSION >> 4: + goto do_v6; + default: + m_freem(m); + goto done; + } + } + /* FALLTHROUGH */ default: + /* Other cases are not handled for now */ m_freem(m); goto done; } - /* Other cases are not handled for now */ } rt = rtalloc1(smplstosa(smpls), RT_REPORT, 0); |