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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
commit | 19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch) | |
tree | d59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/libsystemd/sd-resolve/test-resolve.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 241.upstream/241upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libsystemd/sd-resolve/test-resolve.c')
-rw-r--r-- | src/libsystemd/sd-resolve/test-resolve.c | 109 |
1 files changed, 109 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..8de7adc --- /dev/null +++ b/src/libsystemd/sd-resolve/test-resolve.c @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <arpa/inet.h> +#include <errno.h> +#include <netinet/in.h> +#include <resolv.h> +#include <stdio.h> +#include <string.h> +#include <sys/socket.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 = 0; + + struct addrinfo hints = { + .ai_family = PF_UNSPEC, + .ai_socktype = SOCK_STREAM, + .ai_flags = AI_CANONNAME + }; + + struct sockaddr_in sa = { + .sin_family = AF_INET, + .sin_port = htons(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; +} |