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;
}
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 */
sd_resolve_getaddrinfo(resolve, NULL, "redhat.com", "http", NULL, getaddrinfo_handler, NULL);
/* 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 the two queries are completed */
while (sd_resolve_query_is_done(q1) == 0 ||
sd_resolve_query_is_done(q2) == 0) {
r = sd_resolve_wait(resolve, (uint64_t) -1);
if (r < 0) {
log_error_errno(r, "sd_resolve_wait(): %m");
assert_not_reached("sd_resolve_wait() failed");
}
}
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_resolve_query_unref_ sd_resolve_query *q1 = NULL, *q2 = NULL, *q3 = NULL;
_cleanup_resolve_unref_ 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);
/* 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("sd_resolve_getaddrinfo(): %s\n", strerror(-r));
/* 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("sd_resolve_getnameinfo(): %s\n", strerror(-r));
/* Make a res_query() call */
r = sd_resolve_res_query(resolve, &q3, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV, res_handler, NULL);
if (r < 0)
log_error("sd_resolve_res_query(): %s\n", strerror(-r));
/* Wait until the three queries are completed */
while (sd_resolve_query_is_done(q1) == 0 ||
sd_resolve_query_is_done(q2) == 0 ||
sd_resolve_query_is_done(q3) == 0) {
r = sd_resolve_wait(resolve, (uint64_t) -1);
if (r < 0) {
log_error("sd_resolve_wait(): %s\n", strerror(-r));
assert_not_reached("sd_resolve_wait() failed");
}
}
return 0;
}
static int resolve_remote(Connection *c) {
static const struct addrinfo hints = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_ADDRCONFIG
};
union sockaddr_union sa = {};
const char *node, *service;
int r;
if (IN_SET(arg_remote_host[0], '/', '@')) {
int salen;
salen = sockaddr_un_set_path(&sa.un, arg_remote_host);
if (salen < 0) {
log_error_errno(salen, "Specified address doesn't fit in an AF_UNIX address, refusing: %m");
goto fail;
}
return connection_start(c, &sa.sa, salen);
}
service = strrchr(arg_remote_host, ':');
if (service) {
node = strndupa(arg_remote_host, service - arg_remote_host);
service++;
} else {
node = arg_remote_host;
service = "80";
}
log_debug("Looking up address info for %s:%s", node, service);
r = sd_resolve_getaddrinfo(c->context->resolve, &c->resolve_query, node, service, &hints, resolve_cb, c);
if (r < 0) {
log_error_errno(r, "Failed to resolve remote host: %m");
goto fail;
}
return 0;
fail:
connection_free(c);
return 0; /* ignore errors, continue serving */
}
int manager_connect(Manager *m) {
int r;
assert(m);
manager_disconnect(m);
m->event_retry = sd_event_source_unref(m->event_retry);
if (!ratelimit_test(&m->ratelimit)) {
log_debug("Slowing down attempts to contact servers.");
r = sd_event_add_time(m->event, &m->event_retry, clock_boottime_or_monotonic(), now(clock_boottime_or_monotonic()) + RETRY_USEC, 0, manager_retry_connect, m);
if (r < 0) {
log_error("Failed to create retry timer: %s", strerror(-r));
return r;
}
return 0;
}
/* If we already are operating on some address, switch to the
* next one. */
if (m->current_server_address && m->current_server_address->addresses_next)
manager_set_server_address(m, m->current_server_address->addresses_next);
else {
struct addrinfo hints = {
.ai_flags = AI_NUMERICSERV|AI_ADDRCONFIG,
.ai_socktype = SOCK_DGRAM,
};
/* Hmm, we are through all addresses, let's look for the next host instead */
if (m->current_server_name && m->current_server_name->names_next)
manager_set_server_name(m, m->current_server_name->names_next);
else {
ServerName *f;
/* Our current server name list is exhausted,
* let's find the next one to iterate. First
* we try the system list, then the link list.
* After having processed the link list we
* jump back to the system list. However, if
* both lists are empty, we change to the
* fallback list. */
if (!m->current_server_name || m->current_server_name->type == SERVER_LINK) {
f = m->system_servers;
if (!f)
f = m->link_servers;
} else {
f = m->link_servers;
if (!f)
f = m->system_servers;
}
if (!f)
f = m->fallback_servers;
if (!f) {
manager_set_server_name(m, NULL);
log_debug("No server found.");
return 0;
}
manager_set_server_name(m, f);
}
/* Tell the resolver to reread /etc/resolv.conf, in
* case it changed. */
res_init();
/* Flush out any previously resolved addresses */
server_name_flush_addresses(m->current_server_name);
log_debug("Resolving %s...", m->current_server_name->string);
r = sd_resolve_getaddrinfo(m->resolve, &m->resolve_query, m->current_server_name->string, "123", &hints, manager_resolve_handler, m);
if (r < 0) {
log_error("Failed to create resolver: %s", strerror(-r));
return r;
}
return 1;
}
r = manager_begin(m);
if (r < 0)
return r;
return 1;
}
void manager_disconnect(Manager *m) {
assert(m);
m->resolve_query = sd_resolve_query_unref(m->resolve_query);
m->event_timer = sd_event_source_unref(m->event_timer);
m->event_receive = sd_event_source_unref(m->event_receive);
m->server_socket = safe_close(m->server_socket);
m->event_clock_watch = sd_event_source_unref(m->event_clock_watch);
m->clock_watch_fd = safe_close(m->clock_watch_fd);
m->event_timeout = sd_event_source_unref(m->event_timeout);
sd_notifyf(false, "STATUS=Idle.");
}