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slirp: Allow non-local DNS address when restrict is off 

This can be used to set a DNS server to be used by the guest which is
different from the one configured on the host.

Buglink: https://bugs.launchpad.net/qemu/+bug/1010484
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Samuel Thibault 2019-09-29 20:08:20 +02:00
parent 860d9048c7
commit 120b721f5b
1 changed files with 2 additions and 2 deletions
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4
net/slirp.c
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@ -456,7 +456,7 @@ static int net_slirp_init(NetClientState *peer, const char *model,
error_setg(errp, "Failed to parse DNS");
return -1;
}
if ((dns.s_addr & mask.s_addr) != net.s_addr) {
if (restricted && (dns.s_addr & mask.s_addr) != net.s_addr) {
error_setg(errp, "DNS doesn't belong to network");
return -1;
}
@ -522,7 +522,7 @@ static int net_slirp_init(NetClientState *peer, const char *model,
error_setg(errp, "Failed to parse IPv6 DNS");
return -1;
}
if (!in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) {
if (restricted && !in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) {
error_setg(errp, "IPv6 DNS doesn't belong to network");
return -1;
}