Implement SIOCGIFALIAS.
It is lightweight way to check if an IPv4 address exists. Submitted by: Roy Marples Reviewed by: gnn, melifaro MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D26636
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@ -84,6 +84,7 @@
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#define SIOCGIFDESCR _IOWR('i', 42, struct ifreq) /* get ifnet descr */
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#define SIOCGIFDESCR _IOWR('i', 42, struct ifreq) /* get ifnet descr */
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#define SIOCAIFADDR _IOW('i', 43, struct ifaliasreq)/* add/chg IF alias */
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#define SIOCAIFADDR _IOW('i', 43, struct ifaliasreq)/* add/chg IF alias */
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#define SIOCGIFDATA _IOW('i', 44, struct ifreq) /* get if_data */
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#define SIOCGIFDATA _IOW('i', 44, struct ifreq) /* get if_data */
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#define SIOCGIFALIAS _IOWR('i', 45, struct ifaliasreq)/* get IF alias */
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#define SIOCADDMULTI _IOW('i', 49, struct ifreq) /* add m'cast addr */
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#define SIOCADDMULTI _IOW('i', 49, struct ifreq) /* add m'cast addr */
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#define SIOCDELMULTI _IOW('i', 50, struct ifreq) /* del m'cast addr */
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#define SIOCDELMULTI _IOW('i', 50, struct ifreq) /* del m'cast addr */
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