1 files changed, 107 insertions, 0 deletions
diff --git a/src/libsystemd/sd-resolve/test-resolve.c b/src/libsystemd/sd-resolve/test-resolve.c
new file mode 100644
index 0000000..b973dfd
--- /dev/null
+++ b/src/libsystemd/sd-resolve/test-resolve.c
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <stdio.h>
+
+#include "sd-resolve.h"
+
+#include "alloc-util.h"
+#include "macro.h"
+#include "socket-util.h"
+#include "string-util.h"
+#include "time-util.h"
+
+#define TEST_TIMEOUT_USEC (20*USEC_PER_SEC)
+
+static int getaddrinfo_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {
+        const struct addrinfo *i;
+
+        assert_se(q);
+
+        if (ret != 0) {
+                log_error("getaddrinfo error: %s %i", gai_strerror(ret), ret);
+                return 0;
+        }
+
+        for (i = ai; i; i = i->ai_next) {
+                _cleanup_free_ char *addr = NULL;
+
+                assert_se(sockaddr_pretty(i->ai_addr, i->ai_addrlen, false, true, &addr) == 0);
+                puts(addr);
+        }
+
+        printf("canonical name: %s\n", strna(ai->ai_canonname));
+
+        return 0;
+}
+
+static int getnameinfo_handler(sd_resolve_query *q, int ret, const char *host, const char *serv, void *userdata) {
+        assert_se(q);
+
+        if (ret != 0) {
+                log_error("getnameinfo error: %s %i", gai_strerror(ret), ret);
+                return 0;
+        }
+
+        printf("Host: %s — Serv: %s\n", strna(host), strna(serv));
+        return 0;
+}
+
+int main(int argc, char *argv[]) {
+        _cleanup_(sd_resolve_query_unrefp) sd_resolve_query *q1 = NULL, *q2 = NULL;
+        _cleanup_(sd_resolve_unrefp) sd_resolve *resolve = NULL;
+        int r;
+
+        struct addrinfo hints = {
+                .ai_family = AF_UNSPEC,
+                .ai_socktype = SOCK_STREAM,
+                .ai_flags = AI_CANONNAME
+        };
+
+        struct sockaddr_in sa = {
+                .sin_family = AF_INET,
+                .sin_port = htobe16(80)
+        };
+
+        assert_se(sd_resolve_default(&resolve) >= 0);
+
+        /* Test a floating resolver query */
+        r = sd_resolve_getaddrinfo(resolve, NULL, "redhat.com", "http", NULL, getaddrinfo_handler, NULL);
+        if (r < 0)
+                log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
+
+        /* Make a name -> address query */
+        r = sd_resolve_getaddrinfo(resolve, &q1, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints, getaddrinfo_handler, NULL);
+        if (r < 0)
+                log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
+
+        /* Make an address -> name query */
+        sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
+        r = sd_resolve_getnameinfo(resolve, &q2, (struct sockaddr*) &sa, sizeof(sa), 0, SD_RESOLVE_GET_BOTH, getnameinfo_handler, NULL);
+        if (r < 0)
+                log_error_errno(r, "sd_resolve_getnameinfo(): %m");
+
+        /* Wait until all queries are completed */
+        for (;;) {
+                r = sd_resolve_wait(resolve, TEST_TIMEOUT_USEC);
+                if (r == 0)
+                        break;
+                if (r == -ETIMEDOUT) {
+                        /* Let's catch timeouts here, so that we can run safely in a CI that has no reliable DNS. Note
+                         * that we invoke exit() directly here, as the stuck NSS call will not allow us to exit
+                         * cleanly. */
+
+                        log_notice_errno(r, "sd_resolve_wait() timed out, but that's OK");
+                        exit(EXIT_SUCCESS);
+                }
+                if (r < 0) {
+                        log_error_errno(r, "sd_resolve_wait(): %m");
+                        assert_not_reached("sd_resolve_wait() failed");
+                }
+        }
+
+        return 0;
+}