net: dns: Convert resolver to use socket service API

Instead of using net_context API directly, the DNS resolver is
changed to use the socket service API. This allows DNS access
for offloaded sockets and can lower overall memory consumption.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>

tests/net/lib/dns_addremove/prj.conf

@@ -17,3 +17,4 @@ CONFIG_NET_ARP=n
 CONFIG_PRINTK=y
 CONFIG_ZTEST=y
 CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_NET_SOCKETS_POLL_MAX=5

tests/net/lib/dns_addremove/testcase.yaml

@@ -5,6 +5,9 @@ common:
   depends_on: netif
   min_ram: 16
   timeout: 600
+  platform_exclude:
+    - native_posix
+    - native_posix/native/64
 tests:
   net.dns.addremove:
     min_ram: 21

tests/net/lib/dns_cache/testcase.yaml

@@ -6,6 +6,9 @@ common:
   depends_on: netif
   integration_platforms:
     - native_sim
+  platform_exclude:
+    - native_posix
+    - native_posix/native/64
 tests:
   net.dns.cache:
     build_only: false

tests/net/lib/dns_packet/testcase.yaml

@@ -1,5 +1,8 @@
 tests:
   net.dns:
+    platform_exclude:
+      - native_posix
+      - native_posix/native/64
     min_ram: 16
     tags:
       - dns

tests/net/lib/dns_resolve/prj.conf

@@ -29,3 +29,5 @@ CONFIG_PRINTK=y
 CONFIG_ZTEST=y
 
 CONFIG_MAIN_STACK_SIZE=1344
+CONFIG_NET_SOCKETS_POLL_MAX=9
+CONFIG_POSIX_MAX_FDS=5

tests/net/lib/dns_resolve/src/main.c

@@ -348,7 +348,7 @@ ZTEST(dns_resolve, test_dns_query_server_count)
 			continue;
 		}
 
-		if (!ctx->servers[i].net_ctx) {
+		if (ctx->servers[i].sock < 0) {
 			continue;
 		}
 
@@ -369,7 +369,7 @@ ZTEST(dns_resolve, test_dns_query_ipv4_server_count)
 			continue;
 		}
 
-		if (!ctx->servers[i].net_ctx) {
+		if (ctx->servers[i].sock < 0) {
 			continue;
 		}
 
@@ -399,7 +399,7 @@ ZTEST(dns_resolve, test_dns_query_ipv6_server_count)
 			continue;
 		}
 
-		if (!ctx->servers[i].net_ctx) {
+		if (ctx->servers[i].sock < 0) {
 			continue;
 		}
 

tests/net/lib/dns_resolve/testcase.yaml

@@ -5,6 +5,9 @@ common:
   depends_on: netif
   timeout: 600
   min_ram: 21
+  platform_exclude:
+    - native_posix
+    - native_posix/native/64
 tests:
   net.dns.resolve:
     extra_configs:

tests/net/lib/dns_sd/testcase.yaml

@@ -3,6 +3,9 @@ common:
     - dns
     - net
   depends_on: netif
+  platform_exclude:
+    - native_posix
+    - native_posix/native/64
 tests:
   net.dns.sd:
     min_ram: 21

tests/net/socket/getaddrinfo/testcase.yaml

@@ -6,6 +6,9 @@ common:
     - socket
     - getaddrinfo
     - userspace
+  platform_exclude:
+    - native_posix
+    - native_posix/native/64
 tests:
   net.socket.get_addr_info:
     min_ram: 21

tests/net/socket/poll/src/main.c

@@ -85,7 +85,6 @@ ZTEST(net_socket_poll, test_poll)
 		     tstamp);
 	zassert_equal(res, 0, "");
 
-
 	/* Send pkt for s_sock and poll with timeout of 10 */
 	len = zsock_send(c_sock, BUF_AND_SIZE(TEST_STR_SMALL), 0);
 	zassert_equal(len, STRLEN(TEST_STR_SMALL), "invalid send len");
@@ -151,9 +150,6 @@ ZTEST(net_socket_poll, test_poll)
 	zassert_equal(res, 1, "");
 	zassert_equal(pollout[0].revents, ZSOCK_POLLOUT, "");
 
-	/* Let the network stack run */
-	k_msleep(10);
-
 	res = zsock_close(c_sock_tcp);
 	zassert_equal(res, 0, "close failed");
 

tests/net/socket/poll/testcase.yaml

@@ -3,7 +3,10 @@ common:
   # FIXME: This test fails very frequently on mps2/an385 due to the system
   #        timer stability issues, so keep it disabled until the root cause
   #        is fixed (GitHub issue zephyrproject-rtos/zephyr#48608).
-  platform_exclude: mps2/an385
+  platform_exclude:
+    - mps2/an385
+    - native_posix/native/64
+    - native_posix
 tests:
   net.socket.poll:
     min_ram: 21

tests/net/socket/reuseaddr_reuseport/src/main.c

@@ -14,6 +14,7 @@ LOG_MODULE_REGISTER(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);
 
 #include <zephyr/net/socket.h>
 #include <zephyr/net/net_ip.h>
+#include <zephyr/net/net_if.h>
 
 #include "../../socket_helpers.h"
 

tests/net/socket/socketpair/prj.conf

@@ -7,6 +7,7 @@ CONFIG_NET_IPV4=y
 CONFIG_NET_SOCKETS=y
 CONFIG_NET_SOCKETPAIR=y
 CONFIG_NET_SOCKETPAIR_BUFFER_SIZE=64
+CONFIG_POSIX_MAX_FDS=10
 
 # Network driver config
 CONFIG_TEST_RANDOM_GENERATOR=y

tests/net/socket/socketpair/testcase.yaml

@@ -5,19 +5,22 @@ common:
     - userspace
   depends_on: netif
   min_ram: 21
+  platform_exclude:
+    - native_posix/native/64
+    - native_posix
+    # See #61246 for info about these next two excludes
+    - vmu_rt1170/mimxrt1176/cm7
+    - mimxrt1160_evk/mimxrt1166/cm7
 tests:
-  net.socket.socketpair:
-    platform_exclude: vmu_rt1170/mimxrt1176/cm7 mimxrt1160_evk/mimxrt1166/cm7 # See #61246
+  net.socket.socketpair: {}
   net.socket.socketpair.newlib:
     filter: CONFIG_FULL_LIBC_SUPPORTED
     extra_configs:
       - CONFIG_REQUIRES_FULL_LIBC=y
-    platform_exclude: vmu_rt1170/mimxrt1176/cm7 mimxrt1160_evk/mimxrt1166/cm7 # See #61246
   net.socket.socketpair.picolibc:
     filter: CONFIG_PICOLIBC_SUPPORTED
     extra_configs:
       - CONFIG_PICOLIBC=y
-    platform_exclude: vmu_rt1170/mimxrt1176/cm7 mimxrt1160_evk/mimxrt1166/cm7 # See #61246
   net.socket.socketpair.high_mem:
     min_ram: 64
     extra_configs:
@@ -25,4 +28,3 @@ tests:
       # fail due to insufficient memory. So, use high buffer sizes.
       - CONFIG_NET_SOCKETPAIR_BUFFER_SIZE=4096
       - CONFIG_HEAP_MEM_POOL_SIZE=32768
-    platform_exclude: vmu_rt1170/mimxrt1176/cm7 mimxrt1160_evk/mimxrt1166/cm7 # See #61246

tests/net/socket/tcp/src/main.c

@@ -9,6 +9,7 @@ LOG_MODULE_REGISTER(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);
 
 #include <zephyr/ztest_assert.h>
 #include <zephyr/posix/fcntl.h>
+#include <zephyr/net/net_context.h>
 #include <zephyr/net/socket.h>
 #include <zephyr/net/loopback.h>