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| author | Matthias Andree <matthias.andree@gmx.de> | 2013-02-03 15:54:58 +0100 |
|---|---|---|
| committer | Matthias Andree <matthias.andree@gmx.de> | 2013-02-03 15:54:58 +0100 |
| commit | ab5425702f3448cd56e1bb0c3a751c6c34c55d5f (patch) | |
| tree | e11f69190c3b9dd27e6e7059ef4fe1faa3a7369a | |
| parent | 03a31a4771efd7e48256ac0d7d2442f5e6bc381f (diff) | |
| download | fetchmail-ab5425702f3448cd56e1bb0c3a751c6c34c55d5f.tar.gz fetchmail-ab5425702f3448cd56e1bb0c3a751c6c34c55d5f.tar.bz2 fetchmail-ab5425702f3448cd56e1bb0c3a751c6c34c55d5f.zip | |
Work around systems returning obsolete EAI_NODATA.
Older systems that provide the older RFC-2553 implementation of
getaddrinfo, rather than the current RFC-3493, and systems that do not
provide this getaddrinfo() interface at all and thus use the replacement
functions from libesmtp/getaddrinfo.?, might return EAI_NODATA when a
host is registered in DNS as MX or similar, but without A or AAAA
records. Handle this situation when checking for multidrop aliases and
treat EAI_NODATA the same as EAI_NONAME, i. e. name cannot be resolved.
The proper fix, however, is to upgrade the operating system.
| -rw-r--r-- | NEWS | 14 | ||||
| -rw-r--r-- | checkalias.c | 9 |
2 files changed, 23 insertions, 0 deletions
@@ -56,6 +56,20 @@ removed from a 6.4.0 or newer release.) -------------------------------------------------------------------------------- +fetchmail-6.3.25 (not yet released): + +# WORKAROUNDS +* Older systems that provide the older RFC-2553 implementation of getaddrinfo, + rather than the current RFC-3493, and systems that do not provide this + getaddrinfo() interface at all and thus use the replacement functions from + libesmtp/getaddrinfo.?, might return EAI_NODATA when a host is registered in + DNS as MX or similar, but without A or AAAA records. Handle this situation + when checking for multidrop aliases and treat EAI_NODATA the same as + EAI_NONAME, i. e. name cannot be resolved. + + The proper fix, however, is to upgrade the operating system. + + fetchmail-6.3.24 (released 2012-12-23, 26108 LoC): # NOTE THAT THE RELEASE OF FUTURE FETCHMAIL 6.3.X VERSIONS IS UNCLEAR. diff --git a/checkalias.c b/checkalias.c index 2e50ea09..1e1d1633 100644 --- a/checkalias.c +++ b/checkalias.c @@ -194,6 +194,15 @@ int is_host_alias(const char *name, struct query *ctl, struct addrinfo **res) switch (e) { case EAI_NONAME: /* specified host is unknown */ +#ifdef EAI_NODATA + /* EAI_NODATA was in the older RFC-2553, but that got + * obsoleted by RFC-3493 - there, EAI_NODATA is no longer + * valid, and modern operating systems no longer issue this + * error code. libesmtp/getaddrinfo.?, however, still does. + * (This was reported to Brian Stafford 2013-02-03.) + */ + case EAI_NODATA: /* specified host is unknown */ +#endif break; default: |