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samples: net: dns_resolve: Clarify that DNS queries aren't immediate

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The sample in its default configuration waits for DNS server
configuration via IPv4 or IPv6 specific means. Until this
information is receives, DNS querying won't even start. Make
diagnostic messages explicit of this fact, because if user
doesn't have required services available in the network, the
sample will appear to just hang.

Jira: ZEP-2061

Change-Id: I56a5b7354a2d1239a35d8334ed95a15ebd19254f
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This commit is contained in:
Paul Sokolovsky 2017-04-27 15:47:03 +03:00 committed by Jukka Rissanen
parent e4d8900cc6
commit ddf23f3167
1 changed files with 4 additions and 1 deletions
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5
samples/net/dns_resolve/src/main.c
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@ -137,7 +137,7 @@ static void ipv4_addr_add_handler(struct net_mgmt_event_callback *cb,
static void setup_dhcpv4(struct net_if *iface)
{
NET_INFO("Running dhcpv4 client...");
NET_INFO("Getting IPv4 address via DHCP before issuing DNS query");
net_mgmt_init_event_callback(&mgmt4_cb, ipv4_addr_add_handler,
NET_EVENT_IPV4_ADDR_ADD);
@ -257,6 +257,9 @@ static void setup_ipv6(struct net_if *iface)
NET_INFO("IPv6 address: %s",
net_addr_ntop(AF_INET6, &addr, hr_addr, NET_IPV6_ADDR_LEN));
NET_INFO("Waiting for IPv6 default router notification "
"before issuing DNS query");
}
#else