diff options
Diffstat (limited to 'inet/inet6_opt.c')
| -rw-r--r-- | inet/inet6_opt.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/inet/inet6_opt.c b/inet/inet6_opt.c index 17d3fee213..83063d2259 100644 --- a/inet/inet6_opt.c +++ b/inet/inet6_opt.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2006, 2007 Free Software Foundation, Inc. +/* Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2006. @@ -39,7 +39,11 @@ inet6_opt_init (void *extbuf, socklen_t extlen) /* Fill in the length in units of 8 octets. */ struct ip6_hbh *extp = (struct ip6_hbh *) extbuf; - extp->ip6h_len = extlen / 8; + + /* RFC 2460 requires that the header extension length is the + length of the option header in 8-byte units, not including + the first 8 bytes. Hence we have to subtract one. */ + extp->ip6h_len = extlen / 8 - 1; } return sizeof (struct ip6_hbh); |