Fix if_loop so bpfwrite() can use it regardless of the state of
bd_hdrcmplt. As if_loop does not use link-level headers, its behavior when used by bpfwrite() should be the same regardless of the state of bd_hdrcmplt. Without this change, libpcap (and other BPF users that work like it) fail when writing to loopback interfaces. Differential Revision: https://reviews.freebsd.org/D2989 Reviewed by: gnn, melifaro Approved by: jmallett (mentor) MFC after: 3 days
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=285190
@ -229,7 +229,7 @@ looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
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if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
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/* BPF writes need to be handled specially. */
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if (dst->sa_family == AF_UNSPEC)
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if (dst->sa_family == AF_UNSPEC || dst->sa_family == pseudo_AF_HDRCMPLT)
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bcopy(dst->sa_data, &af, sizeof(af));
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else
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af = dst->sa_family;
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