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Devin Teske
19b0b1f648
derive_mac keeps a per-parent branch index in a global named from the parent interface so the N nibble can increment when the same PHY is presented more than once. That name must be a POSIX identifier; a vlan-style parent (em0.20) is not. Encode the ifname first (alnum unchanged, every other byte as _HH) so the lookup stays a symbol-table hit and em0.20 does not collide with em0_20. Same change in jib (9.2) and jng (9.4). In jng, also address netgraph by node name. ngctl(8) treats `.' and `:' as control characters, so ng_ether(4) names its node after the sanitized ifname (vtnet0.20 becomes vtnet0_20). Sanitize the parent ifname where it enters and use that for every ngctl call; ifconfig(8) and derive_mac keep the real name. Previously jng failed outright on such parents where jib did not. PR: 291143 Reported by: Victor <[email protected]> MFC after: 1 week Reviewed by: jlduran Differential Revision: https://reviews.freebsd.org/D59326