From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 13 May 2014 20:17:20 +0000 (+0100)
Subject: site: Explicitly track name resolution status
X-Git-Tag: debian/0.3.2_beta1~6
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/secnet/commitdiff_plain/5c19b79c7c817a28a1582970b2685c98e05b2de5?hp=5c19b79c7c817a28a1582970b2685c98e05b2de5

site: Explicitly track name resolution status

Introduce a new variable st->resolving which tracks whether we have an
outstanding name resolution request.  This makes it safe to (try to)
start name resolution (via the new function ensure_resolving) multiple
times etc.

No resulting functional change from just this patch.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

---
Changes in v2:
  * Do slightly complicated dance with st->resolving, which is needed
    because of the reentrancy hazard posted by resolver->request.  In
    v1 of the series there was a bug here which could cause the site
    state machine to lock up.
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