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Add a long comment about Solaris 11 BPF.

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I was surprised when I found that Solaris 11 scanning works now. I
thought that it would require a change in the defines around
pcap_selectable_fd_valid, because it's valid for Solaris 10 and earlier
but not for Solaris 11. Why it started working was the
pcap_selectable_fd_one_to_one test added in r28319. As a side effect of
that function overrides pcap_selectable_fd_valid for all Solaris
releases, it makes changes in pcap_selectable_fd_valid unnecessary.
However it is indirect in the way it does it, so I'm adding a comment
explaining the situation and a hope that there is an easy change to make
pcap_selectable_fd_valid correct on its own.
This commit is contained in:
david
2012-04-03 23:06:07 +00:00
parent 0e36867ba8
commit 664dff4644
1 changed files with 7 additions and 0 deletions
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7
libnetutil/netutil.cc
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@@ -857,6 +857,13 @@ void set_ttl(int sd, int ttl) {
#endif
}
/* This should additionally be true for Solaris version 11 (but not 10 or
earlier), but I haven't found a preprocessor symbol that allows easily
testing that. Solaris 10 used DLPI for packet capture, but what OS X,
FreeBSD, and Solaris 11 have in common is that they use BPF. We can get away
with not having Solaris 11 here because the pcap_selectable_fd_one_to_one
test is true for all Solaris and overrides this function everywhere it is
used. */
#if defined(WIN32) || defined(MACOSX) || (defined(FREEBSD) && (__FreeBSD_version < 500000))
/* Returns whether the system supports pcap_get_selectable_fd() properly */
int pcap_selectable_fd_valid() {