diff options
| -rw-r--r-- | zebra/ChangeLog | 9 | ||||
| -rw-r--r-- | zebra/ioctl.c | 37 |
2 files changed, 31 insertions, 15 deletions
diff --git a/zebra/ChangeLog b/zebra/ChangeLog index 6483f2c7..341c42a4 100644 --- a/zebra/ChangeLog +++ b/zebra/ChangeLog @@ -1,3 +1,12 @@ +2008-07-01 Paul Jakma <paul.jakma@sun.com> + + * ioctl.c: (if_get_flags) Deal more gracefully with failure + of the BSD link-state SIOCGIFMEDIA ioctl, as some interfaces + apparently don't implement it (e.g. tun). + Also, make BSD link-state checking be conditional on the + 'link-detect' interface configuration flag, as it should be. + Fixes bug #465. + 2008-06-02 Denis Ovsienko * connected.c: (connected_up_ipv4, connected_down_ipv4, diff --git a/zebra/ioctl.c b/zebra/ioctl.c index d536771a..5cf9e7b0 100644 --- a/zebra/ioctl.c +++ b/zebra/ioctl.c @@ -362,22 +362,29 @@ if_get_flags (struct interface *ifp) return; } #ifdef HAVE_BSD_LINK_DETECT /* Detect BSD link-state at start-up */ - (void) memset(&ifmr, 0, sizeof(ifmr)); - strncpy (&ifmr.ifm_name, ifp->name, IFNAMSIZ); - if (if_ioctl(SIOCGIFMEDIA, (caddr_t) &ifmr) < 0) - { - zlog_err("if_ioctl(SIOCGIFMEDIA) failed: %s", safe_strerror(errno)); - return; - } - if (ifmr.ifm_status & IFM_AVALID) /* Link state is valid */ + + /* Per-default, IFF_RUNNING is held high, unless link-detect says + * otherwise - we abuse IFF_RUNNING inside zebra as a link-state flag, + * following practice on Linux and Solaris kernels + */ + SET_FLAG(ifreq.ifr_flags, IFF_RUNNING); + + if (CHECK_FLAG (ifp->status, ZEBRA_INTERFACE_LINKDETECTION)) { - if (ifmr.ifm_status & IFM_ACTIVE) - SET_FLAG(ifreq.ifr_flags, IFF_RUNNING); - else - UNSET_FLAG(ifreq.ifr_flags, IFF_RUNNING); - } - else /* Force always up */ - SET_FLAG(ifreq.ifr_flags, IFF_RUNNING); + (void) memset(&ifmr, 0, sizeof(ifmr)); + strncpy (&ifmr.ifm_name, ifp->name, IFNAMSIZ); + + /* Seems not all interfaces implement this ioctl */ + if (if_ioctl(SIOCGIFMEDIA, (caddr_t) &ifmr) < 0) + zlog_err("if_ioctl(SIOCGIFMEDIA) failed: %s", safe_strerror(errno)); + else if (ifmr.ifm_status & IFM_AVALID) /* Link state is valid */ + { + if (ifmr.ifm_status & IFM_ACTIVE) + SET_FLAG(ifreq.ifr_flags, IFF_RUNNING); + else + UNSET_FLAG(ifreq.ifr_flags, IFF_RUNNING); + } + } #endif /* HAVE_BSD_LINK_DETECT */ if_flags_update (ifp, (ifreq.ifr_flags & 0x0000ffff)); |