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[svn] Turn on opt.ipv4_only if we're compiling with IPv6, and AI_ADDRINFO is not

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available, and AF_INET6 sockets can't be created.
This commit is contained in:
hniksic 2003-11-13 08:41:17 -08:00
parent fea4fb28cb
commit a0bae929ea
2 changed files with 29 additions and 0 deletions
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6
src/ChangeLog
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@ -1,3 +1,9 @@
2003-11-13 Hrvoje Niksic <hniksic@xemacs.org>
* init.c (defaults): Turn on opt.ipv4_only if we're compiling with
IPv6, and AI_ADDRINFO is not available, and AF_INET6 sockets can't
be created.
2003-11-13 Hrvoje Niksic <hniksic@xemacs.org> 2003-11-13 Hrvoje Niksic <hniksic@xemacs.org>
* host.c (lookup_host): Document the fact that the addresses are * host.c (lookup_host): Document the fact that the addresses are

23
src/init.c
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@ -304,6 +304,29 @@ defaults (void)
opt.restrict_files_os = restrict_windows; opt.restrict_files_os = restrict_windows;
#endif #endif
opt.restrict_files_ctrl = 1; opt.restrict_files_ctrl = 1;
#ifdef ENABLE_IPV6
# ifndef HAVE_GETADDRINFO_AI_ADDRCONFIG
/* If IPv6 is enabled, but AI_ADDRCONFIG is missing, check whether
we can create AF_INET6 sockets. If we can't, turn on the
--inet4-only setting. This is necessary because on some systems
(e.g. RHL 9) getaddrinfo resolves AAAA records, but socket()
can't even create an AF_INET6 socket, let alone connect to IPv6
hosts. To avoid "address family not supported" error messages,
we set ipv4_only.
We do it as early as here, so that the user can revert the
settingn using --no-inet4-only, in case he wants to see the error
messages, for whatever reason. */
{
int sock = socket (AF_INET6, SOCK_STREAM, 0);
if (sock < 0)
opt.ipv4_only = 1;
else
close (sock);
}
# endif /* not HAVE_GETADDRINFO_AI_ADDRCONFIG */
#endif /* ENABLE_IPV6 */
} }
/* Return the user's home directory (strdup-ed), or NULL if none is /* Return the user's home directory (strdup-ed), or NULL if none is