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zebra: don't log errors on unsupported medias

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When using `SIOCGIFMEDIA` check for `EINVAL`, otherwise we might print
an error message on an unsupported interface.

FreeBSD source code reference:
https://github.com/freebsd/freebsd/blob/master/sys/net/if_media.c#L300

And:
8cb4b0c018/usr.sbin/rtsold/if.c (L211)

  /*
   * EINVAL simply means that the interface does not support
   * the SIOCGIFMEDIA ioctl. We regard it alive.
   */

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
This commit is contained in:
Rafael Zalamena 2018-12-05 17:22:56 -02:00
parent 86c57af534
commit c69f2c1fff
1 changed files with 2 additions and 1 deletions
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3
zebra/ioctl.c
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@ -415,7 +415,8 @@ void if_get_flags(struct interface *ifp)
strncpy(ifmr.ifm_name, ifp->name, IFNAMSIZ);
/* Seems not all interfaces implement this ioctl */
if (if_ioctl(SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
if (if_ioctl(SIOCGIFMEDIA, (caddr_t)&ifmr) == -1 &&
errno != EINVAL)
flog_err_sys(EC_LIB_SYSTEM_CALL,
"if_ioctl(SIOCGIFMEDIA) failed: %s",
safe_strerror(errno));