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net: do not set V4MAPPED on FreeBSD
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V4MAPPED is not supported on recent FreeBSD versions, at least on 10.1.
Thus, do not set this flag in net.connect on FreeBSD.

Fixes #8540 and #9204.

Reviewed-By: Colin Ihrig <[email protected]>
PR-URL: #18204
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Julien Gilli committed Apr 28, 2015
1 parent a58b174 commit 0e392f3
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Showing 2 changed files with 15 additions and 4 deletions.
5 changes: 3 additions & 2 deletions doc/api/dns.markdown
Original file line number Diff line number Diff line change
Expand Up @@ -259,8 +259,9 @@ The following flags can be passed as hints to `dns.lookup`.
of addresses supported by the current system. For example, IPv4 addresses
are only returned if the current system has at least one IPv4 address
configured. Loopback addresses are not considered.
- `dns.V4MAPPED`: If the IPv6 family was specified, but no IPv6 addresses
were found, then return IPv4 mapped IPv6 addresses.
- `dns.V4MAPPED`: If the IPv6 family was specified, but no IPv6 addresses were
found, then return IPv4 mapped IPv6 addresses. Note that it is not supported
on some operating systems (e.g FreeBSD 10.1).

## Implementation considerations

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14 changes: 12 additions & 2 deletions lib/net.js
Original file line number Diff line number Diff line change
Expand Up @@ -917,8 +917,18 @@ Socket.prototype.connect = function(options, cb) {
throw new RangeError('port should be >= 0 and < 65536: ' +
options.port);

if (dnsopts.family !== 4 && dnsopts.family !== 6)
dnsopts.hints = dns.ADDRCONFIG | dns.V4MAPPED;
if (dnsopts.family !== 4 && dnsopts.family !== 6) {
dnsopts.hints = dns.ADDRCONFIG;
// The AI_V4MAPPED hint is not supported on FreeBSD, and getaddrinfo
// returns EAI_BADFLAGS. However, it seems to be supported on most other
// systems. See
// http://lists.freebsd.org/pipermail/freebsd-bugs/2008-February/028260.html
// and
// https://svnweb.freebsd.org/base/head/lib/libc/net/getaddrinfo.c?r1=172052&r2=175955
// for more information on the lack of support for FreeBSD.
if (process.platform !== 'freebsd')
dnsopts.hints |= dns.V4MAPPED;
}

debug('connect: find host ' + host);
debug('connect: dns options ' + dnsopts);
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