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Document GNU libc lossage in listen_addr doc string

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Systems using GNU libc such as Linux are frequently configured in a
way getaddrinfo(NULL, ...) put the IPv4 wildcard "0.0.0.0" *before*
the IPv6 wildcard "::" in the result.  Because of that, listen_addr ""
listens only on all IPv4 addresses.  Workaround: listen_addr "::".

Document it in listen_addr's doc string.
This commit is contained in:
Markus Armbruster 2013-04-07 20:40:29 +02:00
parent c3e5fd2375
commit 1afe0a7993
1 changed files with 4 additions and 1 deletions
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5
include/econfig-spec.h
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@ -88,7 +88,10 @@ EMPCF_COMMENT("# \"\" listens on all, localhost just on the loopback interface.\
"# OpenBSD restriction: when the system has both IPv4 and IPv6\n" "# OpenBSD restriction: when the system has both IPv4 and IPv6\n"
"# addresses configured, \"\" listens on all IPv4 addresses, and \"::\"\n" "# addresses configured, \"\" listens on all IPv4 addresses, and \"::\"\n"
"# on all IPv6 addresses. There is no way to listen both on all IPv4\n" "# on all IPv6 addresses. There is no way to listen both on all IPv4\n"
"# and on all IPv6 interfaces.") "# and on all IPv6 interfaces.\n"
"# Systems using GNU libc such as Linux are frequently configured in a\n"
"# way that makes listen_addr "" listen only on all IPv4 addresses.\n"
"# You need to use \"::\" to listen on all IPv4 and IPv6 addresses.")
EMPCFBOTH("port", loginport, char *, NSC_STRING, KM_INTERNAL, EMPCFBOTH("port", loginport, char *, NSC_STRING, KM_INTERNAL,
"TCP port the server will bind") "TCP port the server will bind")
EMPCFBOTH("keep_journal", keep_journal, int, NSC_INT, KM_INTERNAL, EMPCFBOTH("keep_journal", keep_journal, int, NSC_INT, KM_INTERNAL,