--- /dev/null
+/*
+ * Copyright (c) 2003-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2010 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef WIN32
+#include <winsock2.h>
+#include <windows.h>
+#include <ws2tcpip.h>
+#endif
+
+#include "event2/event-config.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef _EVENT_HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#include <sys/queue.h>
+#ifndef WIN32
+#include <sys/socket.h>
+#include <signal.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#endif
+#ifdef _EVENT_HAVE_NETINET_IN6_H
+#include <netinet/in6.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "event2/dns.h"
+#include "event2/dns_compat.h"
+#include "event2/dns_struct.h"
+#include "event2/event.h"
+#include "event2/event_compat.h"
+#include "event2/event_struct.h"
+#include "event2/util.h"
+#include "event2/listener.h"
+#include "event2/bufferevent.h"
+#include "log-internal.h"
+#include "regress.h"
+#include "regress_testutils.h"
+
+static int dns_ok = 0;
+static int dns_got_cancel = 0;
+static int dns_err = 0;
+
+
+static void
+dns_gethostbyname_cb(int result, char type, int count, int ttl,
+ void *addresses, void *arg)
+{
+ dns_ok = dns_err = 0;
+
+ if (result == DNS_ERR_TIMEOUT) {
+ printf("[Timed out] ");
+ dns_err = result;
+ goto out;
+ }
+
+ if (result != DNS_ERR_NONE) {
+ printf("[Error code %d] ", result);
+ goto out;
+ }
+
+ TT_BLATHER(("type: %d, count: %d, ttl: %d: ", type, count, ttl));
+
+ switch (type) {
+ case DNS_IPv6_AAAA: {
+#if defined(_EVENT_HAVE_STRUCT_IN6_ADDR) && defined(_EVENT_HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
+ struct in6_addr *in6_addrs = addresses;
+ char buf[INET6_ADDRSTRLEN+1];
+ int i;
+ /* a resolution that's not valid does not help */
+ if (ttl < 0)
+ goto out;
+ for (i = 0; i < count; ++i) {
+ const char *b = inet_ntop(AF_INET6, &in6_addrs[i], buf,sizeof(buf));
+ if (b)
+ TT_BLATHER(("%s ", b));
+ else
+ TT_BLATHER(("%s ", strerror(errno)));
+ }
+#endif
+ break;
+ }
+ case DNS_IPv4_A: {
+ struct in_addr *in_addrs = addresses;
+ int i;
+ /* a resolution that's not valid does not help */
+ if (ttl < 0)
+ goto out;
+ for (i = 0; i < count; ++i)
+ TT_BLATHER(("%s ", inet_ntoa(in_addrs[i])));
+ break;
+ }
+ case DNS_PTR:
+ /* may get at most one PTR */
+ if (count != 1)
+ goto out;
+
+ TT_BLATHER(("%s ", *(char **)addresses));
+ break;
+ default:
+ goto out;
+ }
+
+ dns_ok = type;
+
+out:
+ if (arg == NULL)
+ event_loopexit(NULL);
+ else
+ event_base_loopexit((struct event_base *)arg, NULL);
+}
+
+static void
+dns_gethostbyname(void)
+{
+ dns_ok = 0;
+ evdns_resolve_ipv4("www.monkey.org", 0, dns_gethostbyname_cb, NULL);
+ event_dispatch();
+
+ tt_int_op(dns_ok, ==, DNS_IPv4_A);
+ test_ok = dns_ok;
+end:
+ ;
+}
+
+static void
+dns_gethostbyname6(void)
+{
+ dns_ok = 0;
+ evdns_resolve_ipv6("www.ietf.org", 0, dns_gethostbyname_cb, NULL);
+ event_dispatch();
+
+ if (!dns_ok && dns_err == DNS_ERR_TIMEOUT) {
+ tt_skip();
+ }
+
+ tt_int_op(dns_ok, ==, DNS_IPv6_AAAA);
+ test_ok = 1;
+end:
+ ;
+}
+
+static void
+dns_gethostbyaddr(void)
+{
+ struct in_addr in;
+ in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
+ dns_ok = 0;
+ evdns_resolve_reverse(&in, 0, dns_gethostbyname_cb, NULL);
+ event_dispatch();
+
+ tt_int_op(dns_ok, ==, DNS_PTR);
+ test_ok = dns_ok;
+end:
+ ;
+}
+
+static void
+dns_resolve_reverse(void *ptr)
+{
+ struct in_addr in;
+ struct event_base *base = event_base_new();
+ struct evdns_base *dns = evdns_base_new(base, 1/* init name servers */);
+ struct evdns_request *req = NULL;
+
+ tt_assert(base);
+ tt_assert(dns);
+ in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
+ dns_ok = 0;
+
+ req = evdns_base_resolve_reverse(
+ dns, &in, 0, dns_gethostbyname_cb, base);
+ tt_assert(req);
+
+ event_base_dispatch(base);
+
+ tt_int_op(dns_ok, ==, DNS_PTR);
+
+end:
+ if (dns)
+ evdns_base_free(dns, 0);
+ if (base)
+ event_base_free(base);
+}
+
+static int n_server_responses = 0;
+
+static void
+dns_server_request_cb(struct evdns_server_request *req, void *data)
+{
+ int i, r;
+ const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa";
+ const char TEST_IN6[] =
+ "f.e.f.e." "0.0.0.0." "0.0.0.0." "1.1.1.1."
+ "a.a.a.a." "0.0.0.0." "0.0.0.0." "0.f.f.f.ip6.arpa";
+
+ for (i = 0; i < req->nquestions; ++i) {
+ const int qtype = req->questions[i]->type;
+ const int qclass = req->questions[i]->dns_question_class;
+ const char *qname = req->questions[i]->name;
+
+ struct in_addr ans;
+ ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
+ if (qtype == EVDNS_TYPE_A &&
+ qclass == EVDNS_CLASS_INET &&
+ !evutil_ascii_strcasecmp(qname, "zz.example.com")) {
+ r = evdns_server_request_add_a_reply(req, qname,
+ 1, &ans.s_addr, 12345);
+ if (r<0)
+ dns_ok = 0;
+ } else if (qtype == EVDNS_TYPE_AAAA &&
+ qclass == EVDNS_CLASS_INET &&
+ !evutil_ascii_strcasecmp(qname, "zz.example.com")) {
+ char addr6[17] = "abcdefghijklmnop";
+ r = evdns_server_request_add_aaaa_reply(req,
+ qname, 1, addr6, 123);
+ if (r<0)
+ dns_ok = 0;
+ } else if (qtype == EVDNS_TYPE_PTR &&
+ qclass == EVDNS_CLASS_INET &&
+ !evutil_ascii_strcasecmp(qname, TEST_ARPA)) {
+ r = evdns_server_request_add_ptr_reply(req, NULL,
+ qname, "ZZ.EXAMPLE.COM", 54321);
+ if (r<0)
+ dns_ok = 0;
+ } else if (qtype == EVDNS_TYPE_PTR &&
+ qclass == EVDNS_CLASS_INET &&
+ !evutil_ascii_strcasecmp(qname, TEST_IN6)){
+ r = evdns_server_request_add_ptr_reply(req, NULL,
+ qname,
+ "ZZ-INET6.EXAMPLE.COM", 54322);
+ if (r<0)
+ dns_ok = 0;
+ } else if (qtype == EVDNS_TYPE_A &&
+ qclass == EVDNS_CLASS_INET &&
+ !evutil_ascii_strcasecmp(qname, "drop.example.com")) {
+ if (evdns_server_request_drop(req)<0)
+ dns_ok = 0;
+ return;
+ } else {
+ printf("Unexpected question %d %d \"%s\" ",
+ qtype, qclass, qname);
+ dns_ok = 0;
+ }
+ }
+ r = evdns_server_request_respond(req, 0);
+ if (r<0) {
+ printf("Couldn't send reply. ");
+ dns_ok = 0;
+ }
+}
+
+static void
+dns_server_gethostbyname_cb(int result, char type, int count, int ttl,
+ void *addresses, void *arg)
+{
+ if (result == DNS_ERR_CANCEL) {
+ if (arg != (void*)(char*)90909) {
+ printf("Unexpected cancelation");
+ dns_ok = 0;
+ }
+ dns_got_cancel = 1;
+ goto out;
+ }
+ if (result != DNS_ERR_NONE) {
+ printf("Unexpected result %d. ", result);
+ dns_ok = 0;
+ goto out;
+ }
+ if (count != 1) {
+ printf("Unexpected answer count %d. ", count);
+ dns_ok = 0;
+ goto out;
+ }
+ switch (type) {
+ case DNS_IPv4_A: {
+ struct in_addr *in_addrs = addresses;
+ if (in_addrs[0].s_addr != htonl(0xc0a80b0bUL) || ttl != 12345) {
+ printf("Bad IPv4 response \"%s\" %d. ",
+ inet_ntoa(in_addrs[0]), ttl);
+ dns_ok = 0;
+ goto out;
+ }
+ break;
+ }
+ case DNS_IPv6_AAAA: {
+#if defined (_EVENT_HAVE_STRUCT_IN6_ADDR) && defined(_EVENT_HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
+ struct in6_addr *in6_addrs = addresses;
+ char buf[INET6_ADDRSTRLEN+1];
+ if (memcmp(&in6_addrs[0].s6_addr, "abcdefghijklmnop", 16)
+ || ttl != 123) {
+ const char *b = inet_ntop(AF_INET6, &in6_addrs[0],buf,sizeof(buf));
+ printf("Bad IPv6 response \"%s\" %d. ", b, ttl);
+ dns_ok = 0;
+ goto out;
+ }
+#endif
+ break;
+ }
+ case DNS_PTR: {
+ char **addrs = addresses;
+ if (arg != (void*)6) {
+ if (strcmp(addrs[0], "ZZ.EXAMPLE.COM") ||
+ ttl != 54321) {
+ printf("Bad PTR response \"%s\" %d. ",
+ addrs[0], ttl);
+ dns_ok = 0;
+ goto out;
+ }
+ } else {
+ if (strcmp(addrs[0], "ZZ-INET6.EXAMPLE.COM") ||
+ ttl != 54322) {
+ printf("Bad ipv6 PTR response \"%s\" %d. ",
+ addrs[0], ttl);
+ dns_ok = 0;
+ goto out;
+ }
+ }
+ break;
+ }
+ default:
+ printf("Bad response type %d. ", type);
+ dns_ok = 0;
+ }
+ out:
+ if (++n_server_responses == 3) {
+ event_loopexit(NULL);
+ }
+}
+
+static void
+dns_server(void)
+{
+ evutil_socket_t sock=-1;
+ struct sockaddr_in my_addr;
+ struct sockaddr_storage ss;
+ ev_socklen_t slen;
+ struct evdns_server_port *port=NULL;
+ struct in_addr resolve_addr;
+ struct in6_addr resolve_addr6;
+ struct evdns_base *base=NULL;
+ struct evdns_request *req=NULL;
+
+ dns_ok = 1;
+
+ base = evdns_base_new(NULL, 0);
+
+ /* Now configure a nameserver port. */
+ sock = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock<0) {
+ tt_abort_perror("socket");
+ }
+
+ evutil_make_socket_nonblocking(sock);
+
+ memset(&my_addr, 0, sizeof(my_addr));
+ my_addr.sin_family = AF_INET;
+ my_addr.sin_port = 0; /* kernel picks */
+ my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
+ if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
+ tt_abort_perror("bind");
+ }
+ slen = sizeof(ss);
+ if (getsockname(sock, (struct sockaddr*)&ss, &slen) < 0) {
+ tt_abort_perror("getsockname");
+ }
+
+ port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);
+
+ /* Add ourself as the only nameserver, and make sure we really are
+ * the only nameserver. */
+ evdns_base_nameserver_sockaddr_add(base, (struct sockaddr*)&ss, slen, 0);
+ tt_int_op(evdns_base_count_nameservers(base), ==, 1);
+
+ /* Send some queries. */
+ evdns_base_resolve_ipv4(base, "zz.example.com", DNS_QUERY_NO_SEARCH,
+ dns_server_gethostbyname_cb, NULL);
+ evdns_base_resolve_ipv6(base, "zz.example.com", DNS_QUERY_NO_SEARCH,
+ dns_server_gethostbyname_cb, NULL);
+ resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
+ evdns_base_resolve_reverse(base, &resolve_addr, 0,
+ dns_server_gethostbyname_cb, NULL);
+ memcpy(resolve_addr6.s6_addr,
+ "\xff\xf0\x00\x00\x00\x00\xaa\xaa"
+ "\x11\x11\x00\x00\x00\x00\xef\xef", 16);
+ evdns_base_resolve_reverse_ipv6(base, &resolve_addr6, 0,
+ dns_server_gethostbyname_cb, (void*)6);
+
+ req = evdns_base_resolve_ipv4(base,
+ "drop.example.com", DNS_QUERY_NO_SEARCH,
+ dns_server_gethostbyname_cb, (void*)(char*)90909);
+
+ evdns_cancel_request(base, req);
+
+ event_dispatch();
+
+ tt_assert(dns_got_cancel);
+ test_ok = dns_ok;
+
+end:
+ if (port)
+ evdns_close_server_port(port);
+ if (sock >= 0)
+ evutil_closesocket(sock);
+ if (base)
+ evdns_base_free(base, 0);
+}
+
+static int n_replies_left;
+static struct event_base *exit_base;
+
+struct generic_dns_callback_result {
+ int result;
+ char type;
+ int count;
+ int ttl;
+ size_t addrs_len;
+ void *addrs;
+ char addrs_buf[256];
+};
+
+static void
+generic_dns_callback(int result, char type, int count, int ttl, void *addresses,
+ void *arg)
+{
+ size_t len;
+ struct generic_dns_callback_result *res = arg;
+ res->result = result;
+ res->type = type;
+ res->count = count;
+ res->ttl = ttl;
+
+ if (type == DNS_IPv4_A)
+ len = count * 4;
+ else if (type == DNS_IPv6_AAAA)
+ len = count * 16;
+ else if (type == DNS_PTR)
+ len = strlen(addresses)+1;
+ else {
+ res->addrs_len = len = 0;
+ res->addrs = NULL;
+ }
+ if (len) {
+ res->addrs_len = len;
+ if (len > 256)
+ len = 256;
+ memcpy(res->addrs_buf, addresses, len);
+ res->addrs = res->addrs_buf;
+ }
+
+ if (--n_replies_left == 0)
+ event_base_loopexit(exit_base, NULL);
+}
+
+static struct regress_dns_server_table search_table[] = {
+ { "host.a.example.com", "err", "3", 0 },
+ { "host.b.example.com", "err", "3", 0 },
+ { "host.c.example.com", "A", "11.22.33.44", 0 },
+ { "host2.a.example.com", "err", "3", 0 },
+ { "host2.b.example.com", "A", "200.100.0.100", 0 },
+ { "host2.c.example.com", "err", "3", 0 },
+
+ { "host", "err", "3", 0 },
+ { "host2", "err", "3", 0 },
+ { "*", "err", "3", 0 },
+ { NULL, NULL, NULL, 0 }
+};
+
+static void
+dns_search_test(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct event_base *base = data->base;
+ struct evdns_base *dns = NULL;
+ ev_uint16_t portnum = 0;
+ char buf[64];
+
+ struct generic_dns_callback_result r1, r2, r3, r4, r5;
+
+ tt_assert(regress_dnsserver(base, &portnum, search_table));
+ evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
+
+ dns = evdns_base_new(base, 0);
+ tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
+
+ evdns_base_search_add(dns, "a.example.com");
+ evdns_base_search_add(dns, "b.example.com");
+ evdns_base_search_add(dns, "c.example.com");
+
+ n_replies_left = 5;
+ exit_base = base;
+
+ evdns_base_resolve_ipv4(dns, "host", 0, generic_dns_callback, &r1);
+ evdns_base_resolve_ipv4(dns, "host2", 0, generic_dns_callback, &r2);
+ evdns_base_resolve_ipv4(dns, "host", DNS_NO_SEARCH, generic_dns_callback, &r3);
+ evdns_base_resolve_ipv4(dns, "host2", DNS_NO_SEARCH, generic_dns_callback, &r4);
+ evdns_base_resolve_ipv4(dns, "host3", 0, generic_dns_callback, &r5);
+
+ event_base_dispatch(base);
+
+ tt_int_op(r1.type, ==, DNS_IPv4_A);
+ tt_int_op(r1.count, ==, 1);
+ tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0x0b16212c));
+ tt_int_op(r2.type, ==, DNS_IPv4_A);
+ tt_int_op(r2.count, ==, 1);
+ tt_int_op(((ev_uint32_t*)r2.addrs)[0], ==, htonl(0xc8640064));
+ tt_int_op(r3.result, ==, DNS_ERR_NOTEXIST);
+ tt_int_op(r4.result, ==, DNS_ERR_NOTEXIST);
+ tt_int_op(r5.result, ==, DNS_ERR_NOTEXIST);
+
+end:
+ if (dns)
+ evdns_base_free(dns, 0);
+
+ regress_clean_dnsserver();
+}
+
+static int request_count = 0;
+static struct evdns_request *current_req = NULL;
+
+static void
+search_cancel_server_cb(struct evdns_server_request *req, void *data)
+{
+ const char *question;
+
+ if (req->nquestions != 1)
+ TT_DIE(("Only handling one question at a time; got %d",
+ req->nquestions));
+
+ question = req->questions[0]->name;
+
+ TT_BLATHER(("got question, %s", question));
+
+ tt_assert(request_count > 0);
+ tt_assert(!evdns_server_request_respond(req, 3));
+
+ if (!--request_count)
+ evdns_cancel_request(NULL, current_req);
+
+end:
+ ;
+}
+
+static void
+dns_search_cancel_test(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct event_base *base = data->base;
+ struct evdns_base *dns = NULL;
+ struct evdns_server_port *port = NULL;
+ ev_uint16_t portnum = 0;
+ struct generic_dns_callback_result r1;
+ char buf[64];
+
+ port = regress_get_dnsserver(base, &portnum, NULL,
+ search_cancel_server_cb, NULL);
+ tt_assert(port);
+ evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
+
+ dns = evdns_base_new(base, 0);
+ tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
+
+ evdns_base_search_add(dns, "a.example.com");
+ evdns_base_search_add(dns, "b.example.com");
+ evdns_base_search_add(dns, "c.example.com");
+ evdns_base_search_add(dns, "d.example.com");
+
+ exit_base = base;
+ request_count = 3;
+ n_replies_left = 1;
+
+ current_req = evdns_base_resolve_ipv4(dns, "host", 0,
+ generic_dns_callback, &r1);
+ event_base_dispatch(base);
+
+ tt_int_op(r1.result, ==, DNS_ERR_CANCEL);
+
+end:
+ if (port)
+ evdns_close_server_port(port);
+ if (dns)
+ evdns_base_free(dns, 0);
+}
+
+static void
+fail_server_cb(struct evdns_server_request *req, void *data)
+{
+ const char *question;
+ int *count = data;
+ struct in_addr in;
+
+ /* Drop the first N requests that we get. */
+ if (*count > 0) {
+ --*count;
+ tt_want(! evdns_server_request_drop(req));
+ return;
+ }
+
+ if (req->nquestions != 1)
+ TT_DIE(("Only handling one question at a time; got %d",
+ req->nquestions));
+
+ question = req->questions[0]->name;
+
+ if (!evutil_ascii_strcasecmp(question, "google.com")) {
+ /* Detect a probe, and get out of the loop. */
+ event_base_loopexit(exit_base, NULL);
+ }
+
+ evutil_inet_pton(AF_INET, "16.32.64.128", &in);
+ evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
+ 100);
+ tt_assert(! evdns_server_request_respond(req, 0))
+ return;
+end:
+ tt_want(! evdns_server_request_drop(req));
+}
+
+static void
+dns_retry_test(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct event_base *base = data->base;
+ struct evdns_server_port *port = NULL;
+ struct evdns_base *dns = NULL;
+ int drop_count = 2;
+ ev_uint16_t portnum = 0;
+ char buf[64];
+
+ struct generic_dns_callback_result r1;
+
+ port = regress_get_dnsserver(base, &portnum, NULL,
+ fail_server_cb, &drop_count);
+ tt_assert(port);
+ evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
+
+ dns = evdns_base_new(base, 0);
+ tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
+ tt_assert(! evdns_base_set_option(dns, "timeout", "0.3"));
+ tt_assert(! evdns_base_set_option(dns, "max-timeouts:", "10"));
+ tt_assert(! evdns_base_set_option(dns, "initial-probe-timeout", "0.5"));
+
+ evdns_base_resolve_ipv4(dns, "host.example.com", 0,
+ generic_dns_callback, &r1);
+
+ n_replies_left = 1;
+ exit_base = base;
+
+ event_base_dispatch(base);
+
+ tt_int_op(drop_count, ==, 0);
+
+ tt_int_op(r1.type, ==, DNS_IPv4_A);
+ tt_int_op(r1.count, ==, 1);
+ tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0x10204080));
+
+ /* Now try again, but this time have the server get treated as
+ * failed, so we can send it a test probe. */
+ drop_count = 4;
+ tt_assert(! evdns_base_set_option(dns, "max-timeouts:", "3"));
+ tt_assert(! evdns_base_set_option(dns, "attempts:", "4"));
+ memset(&r1, 0, sizeof(r1));
+
+ evdns_base_resolve_ipv4(dns, "host.example.com", 0,
+ generic_dns_callback, &r1);
+
+ n_replies_left = 2;
+
+ /* This will run until it answers the "google.com" probe request. */
+ event_base_dispatch(base);
+
+ /* We'll treat the server as failed here. */
+ tt_int_op(r1.result, ==, DNS_ERR_TIMEOUT);
+
+ /* It should work this time. */
+ tt_int_op(drop_count, ==, 0);
+ evdns_base_resolve_ipv4(dns, "host.example.com", 0,
+ generic_dns_callback, &r1);
+
+ event_base_dispatch(base);
+ tt_int_op(r1.result, ==, DNS_ERR_NONE);
+ tt_int_op(r1.type, ==, DNS_IPv4_A);
+ tt_int_op(r1.count, ==, 1);
+ tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0x10204080));
+
+end:
+ if (dns)
+ evdns_base_free(dns, 0);
+ if (port)
+ evdns_close_server_port(port);
+}
+
+static struct regress_dns_server_table internal_error_table[] = {
+ /* Error 4 (NOTIMPL) makes us reissue the request to another server
+ if we can.
+
+ XXXX we should reissue under a much wider set of circumstances!
+ */
+ { "foof.example.com", "err", "4", 0 },
+ { NULL, NULL, NULL, 0 }
+};
+
+static struct regress_dns_server_table reissue_table[] = {
+ { "foof.example.com", "A", "240.15.240.15", 0 },
+ { NULL, NULL, NULL, 0 }
+};
+
+static void
+dns_reissue_test(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct event_base *base = data->base;
+ struct evdns_server_port *port1 = NULL, *port2 = NULL;
+ struct evdns_base *dns = NULL;
+ struct generic_dns_callback_result r1;
+ ev_uint16_t portnum1 = 0, portnum2=0;
+ char buf1[64], buf2[64];
+
+ port1 = regress_get_dnsserver(base, &portnum1, NULL,
+ regress_dns_server_cb, internal_error_table);
+ tt_assert(port1);
+ port2 = regress_get_dnsserver(base, &portnum2, NULL,
+ regress_dns_server_cb, reissue_table);
+ tt_assert(port2);
+ evutil_snprintf(buf1, sizeof(buf1), "127.0.0.1:%d", (int)portnum1);
+ evutil_snprintf(buf2, sizeof(buf2), "127.0.0.1:%d", (int)portnum2);
+
+ dns = evdns_base_new(base, 0);
+ tt_assert(!evdns_base_nameserver_ip_add(dns, buf1));
+ tt_assert(! evdns_base_set_option(dns, "timeout:", "0.3"));
+ tt_assert(! evdns_base_set_option(dns, "max-timeouts:", "2"));
+ tt_assert(! evdns_base_set_option(dns, "attempts:", "5"));
+
+ memset(&r1, 0, sizeof(r1));
+ evdns_base_resolve_ipv4(dns, "foof.example.com", 0,
+ generic_dns_callback, &r1);
+
+ /* Add this after, so that we are sure to get a reissue. */
+ tt_assert(!evdns_base_nameserver_ip_add(dns, buf2));
+
+ n_replies_left = 1;
+ exit_base = base;
+
+ event_base_dispatch(base);
+ tt_int_op(r1.result, ==, DNS_ERR_NONE);
+ tt_int_op(r1.type, ==, DNS_IPv4_A);
+ tt_int_op(r1.count, ==, 1);
+ tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0xf00ff00f));
+
+ /* Make sure we dropped at least once. */
+ tt_int_op(internal_error_table[0].seen, >, 0);
+
+end:
+ if (dns)
+ evdns_base_free(dns, 0);
+ if (port1)
+ evdns_close_server_port(port1);
+ if (port2)
+ evdns_close_server_port(port2);
+}
+
+#if 0
+static void
+dumb_bytes_fn(char *p, size_t n)
+{
+ unsigned i;
+ /* This gets us 6 bits of entropy per transaction ID, which means we
+ * will have probably have collisions and need to pick again. */
+ for (i=0;i<n;++i)
+ p[i] = (char)(rand() & 7);
+}
+#endif
+
+static void
+dns_inflight_test(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct event_base *base = data->base;
+ struct evdns_base *dns = NULL;
+ ev_uint16_t portnum = 0;
+ char buf[64];
+
+ struct generic_dns_callback_result r[20];
+ int i;
+
+ tt_assert(regress_dnsserver(base, &portnum, reissue_table));
+ evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
+
+ dns = evdns_base_new(base, 0);
+ tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
+ tt_assert(! evdns_base_set_option(dns, "max-inflight:", "3"));
+ tt_assert(! evdns_base_set_option(dns, "randomize-case:", "0"));
+
+ for (i=0;i<20;++i)
+ evdns_base_resolve_ipv4(dns, "foof.example.com", 0, generic_dns_callback, &r[i]);
+
+ n_replies_left = 20;
+ exit_base = base;
+
+ event_base_dispatch(base);
+
+ for (i=0;i<20;++i) {
+ tt_int_op(r[i].type, ==, DNS_IPv4_A);
+ tt_int_op(r[i].count, ==, 1);
+ tt_int_op(((ev_uint32_t*)r[i].addrs)[0], ==, htonl(0xf00ff00f));
+ }
+
+end:
+ if (dns)
+ evdns_base_free(dns, 0);
+ regress_clean_dnsserver();
+}
+
+/* === Test for bufferevent_socket_connect_hostname */
+
+static int total_connected_or_failed = 0;
+static struct event_base *be_connect_hostname_base = NULL;
+
+/* Implements a DNS server for the connect_hostname test and the
+ * getaddrinfo_async test */
+static void
+be_getaddrinfo_server_cb(struct evdns_server_request *req, void *data)
+{
+ int i;
+ int *n_got_p=data;
+ int added_any=0;
+ ++*n_got_p;
+
+ for (i=0;i<req->nquestions;++i) {
+ const int qtype = req->questions[i]->type;
+ const int qclass = req->questions[i]->dns_question_class;
+ const char *qname = req->questions[i]->name;
+ struct in_addr ans;
+ struct in6_addr ans6;
+ memset(&ans6, 0, sizeof(ans6));
+
+ if (qtype == EVDNS_TYPE_A &&
+ qclass == EVDNS_CLASS_INET &&
+ !evutil_ascii_strcasecmp(qname, "nobodaddy.example.com")) {
+ ans.s_addr = htonl(0x7f000001);
+ evdns_server_request_add_a_reply(req, qname,
+ 1, &ans.s_addr, 2000);
+ added_any = 1;
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "nosuchplace.example.com")) {
+ /* ok, just say notfound. */
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "both.example.com")) {
+ if (qtype == EVDNS_TYPE_A) {
+ ans.s_addr = htonl(0x50502020);
+ evdns_server_request_add_a_reply(req, qname,
+ 1, &ans.s_addr, 2000);
+ added_any = 1;
+ } else if (qtype == EVDNS_TYPE_AAAA) {
+ ans6.s6_addr[0] = 0x80;
+ ans6.s6_addr[1] = 0xff;
+ ans6.s6_addr[14] = 0xbb;
+ ans6.s6_addr[15] = 0xbb;
+ evdns_server_request_add_aaaa_reply(req, qname,
+ 1, &ans6.s6_addr, 2000);
+ added_any = 1;
+ }
+ evdns_server_request_add_cname_reply(req, qname,
+ "both-canonical.example.com", 1000);
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v4only.example.com") ||
+ !evutil_ascii_strcasecmp(qname, "v4assert.example.com")) {
+ if (qtype == EVDNS_TYPE_A) {
+ ans.s_addr = htonl(0x12345678);
+ evdns_server_request_add_a_reply(req, qname,
+ 1, &ans.s_addr, 2000);
+ added_any = 1;
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v4assert.example.com")) {
+ TT_FAIL(("Got an AAAA request for v4assert"));
+ }
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v6only.example.com") ||
+ !evutil_ascii_strcasecmp(qname, "v6assert.example.com")) {
+ if (qtype == EVDNS_TYPE_AAAA) {
+ ans6.s6_addr[0] = 0x0b;
+ ans6.s6_addr[1] = 0x0b;
+ ans6.s6_addr[14] = 0xf0;
+ ans6.s6_addr[15] = 0x0d;
+ evdns_server_request_add_aaaa_reply(req, qname,
+ 1, &ans6.s6_addr, 2000);
+ added_any = 1;
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v6assert.example.com")) {
+ TT_FAIL(("Got a A request for v6assert"));
+ }
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v6timeout.example.com")) {
+ if (qtype == EVDNS_TYPE_A) {
+ ans.s_addr = htonl(0xabcdef01);
+ evdns_server_request_add_a_reply(req, qname,
+ 1, &ans.s_addr, 2000);
+ added_any = 1;
+ } else if (qtype == EVDNS_TYPE_AAAA) {
+ /* Let the v6 request time out.*/
+ evdns_server_request_drop(req);
+ return;
+ }
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v4timeout.example.com")) {
+ if (qtype == EVDNS_TYPE_AAAA) {
+ ans6.s6_addr[0] = 0x0a;
+ ans6.s6_addr[1] = 0x0a;
+ ans6.s6_addr[14] = 0xff;
+ ans6.s6_addr[15] = 0x01;
+ evdns_server_request_add_aaaa_reply(req, qname,
+ 1, &ans6.s6_addr, 2000);
+ added_any = 1;
+ } else if (qtype == EVDNS_TYPE_A) {
+ /* Let the v4 request time out.*/
+ evdns_server_request_drop(req);
+ return;
+ }
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "v6timeout-nonexist.example.com")) {
+ if (qtype == EVDNS_TYPE_A) {
+ /* Fall through, give an nexist. */
+ } else if (qtype == EVDNS_TYPE_AAAA) {
+ /* Let the v6 request time out.*/
+ evdns_server_request_drop(req);
+ return;
+ }
+ } else if (!evutil_ascii_strcasecmp(qname,
+ "all-timeout.example.com")) {
+ /* drop all requests */
+ evdns_server_request_drop(req);
+ return;
+ } else {
+ TT_GRIPE(("Got weird request for %s",qname));
+ }
+ }
+ if (added_any)
+ evdns_server_request_respond(req, 0);
+ else
+ evdns_server_request_respond(req, 3);
+}
+
+/* Implements a listener for connect_hostname test. */
+static void
+nil_accept_cb(struct evconnlistener *l, evutil_socket_t fd, struct sockaddr *s,
+ int socklen, void *arg)
+{
+ int *p = arg;
+ (*p)++;
+ /* don't do anything with the socket; let it close when we exit() */
+}
+
+struct be_conn_hostname_result {
+ int dnserr;
+ int what;
+};
+
+/* Bufferevent event callback for the connect_hostname test: remembers what
+ * event we got. */
+static void
+be_connect_hostname_event_cb(struct bufferevent *bev, short what, void *ctx)
+{
+ struct be_conn_hostname_result *got = ctx;
+ if (!got->what) {
+ TT_BLATHER(("Got a bufferevent event %d", what));
+ got->what = what;
+
+ if ((what & BEV_EVENT_CONNECTED) || (what & BEV_EVENT_ERROR)) {
+ int r;
+ ++total_connected_or_failed;
+ TT_BLATHER(("Got %d connections or errors.", total_connected_or_failed));
+ if ((r = bufferevent_socket_get_dns_error(bev))) {
+ got->dnserr = r;
+ TT_BLATHER(("DNS error %d: %s", r,
+ evutil_gai_strerror(r)));
+ }
+ if (total_connected_or_failed >= 5)
+ event_base_loopexit(be_connect_hostname_base,
+ NULL);
+ }
+ } else {
+ TT_FAIL(("Two events on one bufferevent. %d,%d",
+ got->what, (int)what));
+ }
+}
+
+static void
+test_bufferevent_connect_hostname(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct evconnlistener *listener = NULL;
+ struct bufferevent *be1=NULL, *be2=NULL, *be3=NULL, *be4=NULL, *be5=NULL;
+ struct be_conn_hostname_result be1_outcome={0,0}, be2_outcome={0,0},
+ be3_outcome={0,0}, be4_outcome={0,0}, be5_outcome={0,0};
+ int expect_err5;
+ struct evdns_base *dns=NULL;
+ struct evdns_server_port *port=NULL;
+ evutil_socket_t server_fd=-1;
+ struct sockaddr_in sin;
+ int listener_port=-1;
+ ev_uint16_t dns_port=0;
+ int n_accept=0, n_dns=0;
+ char buf[128];
+
+ be_connect_hostname_base = data->base;
+
+ /* Bind an address and figure out what port it's on. */
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */
+ sin.sin_port = 0;
+ listener = evconnlistener_new_bind(data->base, nil_accept_cb,
+ &n_accept,
+ LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_EXEC,
+ -1, (struct sockaddr *)&sin, sizeof(sin));
+ listener_port = regress_get_socket_port(
+ evconnlistener_get_fd(listener));
+
+ port = regress_get_dnsserver(data->base, &dns_port, NULL,
+ be_getaddrinfo_server_cb, &n_dns);
+ tt_assert(port);
+ tt_int_op(dns_port, >=, 0);
+
+ /* Start an evdns_base that uses the server as its resolver. */
+ dns = evdns_base_new(data->base, 0);
+ evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)dns_port);
+ evdns_base_nameserver_ip_add(dns, buf);
+
+ /* Now, finally, at long last, launch the bufferevents. One should do
+ * a failing lookup IP, one should do a successful lookup by IP,
+ * and one should do a successful lookup by hostname. */
+ be1 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
+ be2 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
+ be3 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
+ be4 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
+ be5 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
+
+ bufferevent_setcb(be1, NULL, NULL, be_connect_hostname_event_cb,
+ &be1_outcome);
+ bufferevent_setcb(be2, NULL, NULL, be_connect_hostname_event_cb,
+ &be2_outcome);
+ bufferevent_setcb(be3, NULL, NULL, be_connect_hostname_event_cb,
+ &be3_outcome);
+ bufferevent_setcb(be4, NULL, NULL, be_connect_hostname_event_cb,
+ &be4_outcome);
+ bufferevent_setcb(be5, NULL, NULL, be_connect_hostname_event_cb,
+ &be5_outcome);
+
+ /* Launch an async resolve that will fail. */
+ tt_assert(!bufferevent_socket_connect_hostname(be1, dns, AF_INET,
+ "nosuchplace.example.com", listener_port));
+ /* Connect to the IP without resolving. */
+ tt_assert(!bufferevent_socket_connect_hostname(be2, dns, AF_INET,
+ "127.0.0.1", listener_port));
+ /* Launch an async resolve that will succeed. */
+ tt_assert(!bufferevent_socket_connect_hostname(be3, dns, AF_INET,
+ "nobodaddy.example.com", listener_port));
+ /* Use the blocking resolver. This one will fail if your resolver
+ * can't resolve localhost to 127.0.0.1 */
+ tt_assert(!bufferevent_socket_connect_hostname(be4, NULL, AF_INET,
+ "localhost", listener_port));
+ /* Use the blocking resolver with a nonexistent hostname. */
+ tt_assert(!bufferevent_socket_connect_hostname(be5, NULL, AF_INET,
+ "nonesuch.nowhere.example.com", 80));
+ {
+ /* The blocking resolver will use the system nameserver, which
+ * might tell us anything. (Yes, some twits even pretend that
+ * example.com is real.) Let's see what answer to expect. */
+ struct evutil_addrinfo hints, *ai = NULL;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = IPPROTO_TCP;
+ expect_err5 = evutil_getaddrinfo(
+ "nonesuch.nowhere.example.com", "80", &hints, &ai);
+ }
+
+ event_base_dispatch(data->base);
+
+ tt_int_op(be1_outcome.what, ==, BEV_EVENT_ERROR);
+ tt_int_op(be1_outcome.dnserr, ==, EVUTIL_EAI_NONAME);
+ tt_int_op(be2_outcome.what, ==, BEV_EVENT_CONNECTED);
+ tt_int_op(be2_outcome.dnserr, ==, 0);
+ tt_int_op(be3_outcome.what, ==, BEV_EVENT_CONNECTED);
+ tt_int_op(be3_outcome.dnserr, ==, 0);
+ tt_int_op(be4_outcome.what, ==, BEV_EVENT_CONNECTED);
+ tt_int_op(be4_outcome.dnserr, ==, 0);
+ if (expect_err5) {
+ tt_int_op(be5_outcome.what, ==, BEV_EVENT_ERROR);
+ tt_int_op(be5_outcome.dnserr, ==, expect_err5);
+ }
+
+ tt_int_op(n_accept, ==, 3);
+ tt_int_op(n_dns, ==, 2);
+
+end:
+ if (listener)
+ evconnlistener_free(listener);
+ if (server_fd>=0)
+ evutil_closesocket(server_fd);
+ if (port)
+ evdns_close_server_port(port);
+ if (dns)
+ evdns_base_free(dns, 0);
+ if (be1)
+ bufferevent_free(be1);
+ if (be2)
+ bufferevent_free(be2);
+ if (be3)
+ bufferevent_free(be3);
+ if (be4)
+ bufferevent_free(be4);
+ if (be5)
+ bufferevent_free(be5);
+}
+
+
+struct gai_outcome {
+ int err;
+ struct evutil_addrinfo *ai;
+};
+
+static int n_gai_results_pending = 0;
+static struct event_base *exit_base_on_no_pending_results = NULL;
+
+static void
+gai_cb(int err, struct evutil_addrinfo *res, void *ptr)
+{
+ struct gai_outcome *go = ptr;
+ go->err = err;
+ go->ai = res;
+ if (--n_gai_results_pending <= 0 && exit_base_on_no_pending_results)
+ event_base_loopexit(exit_base_on_no_pending_results, NULL);
+ if (n_gai_results_pending < 900)
+ TT_BLATHER(("Got an answer; expecting %d more.",
+ n_gai_results_pending));
+}
+
+static void
+cancel_gai_cb(evutil_socket_t fd, short what, void *ptr)
+{
+ struct evdns_getaddrinfo_request *r = ptr;
+ evdns_getaddrinfo_cancel(r);
+}
+
+static void
+test_getaddrinfo_async(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct evutil_addrinfo hints, *a;
+ struct gai_outcome local_outcome;
+ struct gai_outcome a_out[12];
+ int i;
+ struct evdns_getaddrinfo_request *r;
+ char buf[128];
+ struct evdns_server_port *port = NULL;
+ ev_uint16_t dns_port = 0;
+ int n_dns_questions = 0;
+
+ struct evdns_base *dns_base = evdns_base_new(data->base, 0);
+
+ /* for localhost */
+ evdns_base_load_hosts(dns_base, NULL);
+
+ memset(a_out, 0, sizeof(a_out));
+
+ n_gai_results_pending = 10000; /* don't think about exiting yet. */
+
+ /* 1. Try some cases that will never hit the asynchronous resolver. */
+ /* 1a. Simple case with a symbolic service name */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ r = evdns_getaddrinfo(dns_base, "1.2.3.4", "http",
+ &hints, gai_cb, &local_outcome);
+ tt_assert(! r);
+ if (!local_outcome.err) {
+ tt_ptr_op(local_outcome.ai,!=,NULL);
+ test_ai_eq(local_outcome.ai, "1.2.3.4:80", SOCK_STREAM, IPPROTO_TCP);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+ } else {
+ TT_BLATHER(("Apparently we have no getservbyname."));
+ }
+
+ /* 1b. EVUTIL_AI_NUMERICHOST is set */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_flags = EVUTIL_AI_NUMERICHOST;
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ r = evdns_getaddrinfo(dns_base, "www.google.com", "80",
+ &hints, gai_cb, &local_outcome);
+ tt_int_op(r,==,0);
+ tt_int_op(local_outcome.err,==,EVUTIL_EAI_NONAME);
+ tt_ptr_op(local_outcome.ai,==,NULL);
+
+ /* 1c. We give a numeric address (ipv6) */
+ memset(&hints, 0, sizeof(hints));
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_protocol = IPPROTO_TCP;
+ r = evdns_getaddrinfo(dns_base, "f::f", "8008",
+ &hints, gai_cb, &local_outcome);
+ tt_assert(!r);
+ tt_int_op(local_outcome.err,==,0);
+ tt_assert(local_outcome.ai);
+ tt_ptr_op(local_outcome.ai->ai_next,==,NULL);
+ test_ai_eq(local_outcome.ai, "[f::f]:8008", SOCK_STREAM, IPPROTO_TCP);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+
+ /* 1d. We give a numeric address (ipv4) */
+ memset(&hints, 0, sizeof(hints));
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ hints.ai_family = PF_UNSPEC;
+ r = evdns_getaddrinfo(dns_base, "5.6.7.8", NULL,
+ &hints, gai_cb, &local_outcome);
+ tt_assert(!r);
+ tt_int_op(local_outcome.err,==,0);
+ tt_assert(local_outcome.ai);
+ a = ai_find_by_protocol(local_outcome.ai, IPPROTO_TCP);
+ tt_assert(a);
+ test_ai_eq(a, "5.6.7.8", SOCK_STREAM, IPPROTO_TCP);
+ a = ai_find_by_protocol(local_outcome.ai, IPPROTO_UDP);
+ tt_assert(a);
+ test_ai_eq(a, "5.6.7.8", SOCK_DGRAM, IPPROTO_UDP);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+
+ /* 1e. nodename is NULL (bind) */
+ memset(&hints, 0, sizeof(hints));
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_flags = EVUTIL_AI_PASSIVE;
+ r = evdns_getaddrinfo(dns_base, NULL, "9090",
+ &hints, gai_cb, &local_outcome);
+ tt_assert(!r);
+ tt_int_op(local_outcome.err,==,0);
+ tt_assert(local_outcome.ai);
+ /* we should get a v4 address of 0.0.0.0... */
+ a = ai_find_by_family(local_outcome.ai, PF_INET);
+ tt_assert(a);
+ test_ai_eq(a, "0.0.0.0:9090", SOCK_DGRAM, IPPROTO_UDP);
+ /* ... and a v6 address of ::0 */
+ a = ai_find_by_family(local_outcome.ai, PF_INET6);
+ tt_assert(a);
+ test_ai_eq(a, "[::]:9090", SOCK_DGRAM, IPPROTO_UDP);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+
+ /* 1f. nodename is NULL (connect) */
+ memset(&hints, 0, sizeof(hints));
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ r = evdns_getaddrinfo(dns_base, NULL, "2",
+ &hints, gai_cb, &local_outcome);
+ tt_assert(!r);
+ tt_int_op(local_outcome.err,==,0);
+ tt_assert(local_outcome.ai);
+ /* we should get a v4 address of 127.0.0.1 .... */
+ a = ai_find_by_family(local_outcome.ai, PF_INET);
+ tt_assert(a);
+ test_ai_eq(a, "127.0.0.1:2", SOCK_STREAM, IPPROTO_TCP);
+ /* ... and a v6 address of ::1 */
+ a = ai_find_by_family(local_outcome.ai, PF_INET6);
+ tt_assert(a);
+ test_ai_eq(a, "[::1]:2", SOCK_STREAM, IPPROTO_TCP);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+
+ /* 1g. We find localhost immediately. (pf_unspec) */
+ memset(&hints, 0, sizeof(hints));
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ r = evdns_getaddrinfo(dns_base, "LOCALHOST", "80",
+ &hints, gai_cb, &local_outcome);
+ tt_assert(!r);
+ tt_int_op(local_outcome.err,==,0);
+ tt_assert(local_outcome.ai);
+ /* we should get a v4 address of 127.0.0.1 .... */
+ a = ai_find_by_family(local_outcome.ai, PF_INET);
+ tt_assert(a);
+ test_ai_eq(a, "127.0.0.1:80", SOCK_STREAM, IPPROTO_TCP);
+ /* ... and a v6 address of ::1 */
+ a = ai_find_by_family(local_outcome.ai, PF_INET6);
+ tt_assert(a);
+ test_ai_eq(a, "[::1]:80", SOCK_STREAM, IPPROTO_TCP);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+
+ /* 1g. We find localhost immediately. (pf_inet6) */
+ memset(&hints, 0, sizeof(hints));
+ memset(&local_outcome, 0, sizeof(local_outcome));
+ hints.ai_family = PF_INET6;
+ hints.ai_socktype = SOCK_STREAM;
+ r = evdns_getaddrinfo(dns_base, "LOCALHOST", "9999",
+ &hints, gai_cb, &local_outcome);
+ tt_assert(! r);
+ tt_int_op(local_outcome.err,==,0);
+ tt_assert(local_outcome.ai);
+ a = local_outcome.ai;
+ test_ai_eq(a, "[::1]:9999", SOCK_STREAM, IPPROTO_TCP);
+ tt_ptr_op(a->ai_next, ==, NULL);
+ evutil_freeaddrinfo(local_outcome.ai);
+ local_outcome.ai = NULL;
+
+ /* 2. Okay, now we can actually test the asynchronous resolver. */
+ /* Start a dummy local dns server... */
+ port = regress_get_dnsserver(data->base, &dns_port, NULL,
+ be_getaddrinfo_server_cb, &n_dns_questions);
+ tt_assert(port);
+ tt_int_op(dns_port, >=, 0);
+ /* ... and tell the evdns_base about it. */
+ evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", dns_port);
+ evdns_base_nameserver_ip_add(dns_base, buf);
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = EVUTIL_AI_CANONNAME;
+ /* 0: Request for both.example.com should return both addresses. */
+ r = evdns_getaddrinfo(dns_base, "both.example.com", "8000",
+ &hints, gai_cb, &a_out[0]);
+ tt_assert(r);
+
+ /* 1: Request for v4only.example.com should return one address. */
+ r = evdns_getaddrinfo(dns_base, "v4only.example.com", "8001",
+ &hints, gai_cb, &a_out[1]);
+ tt_assert(r);
+
+ /* 2: Request for v6only.example.com should return one address. */
+ hints.ai_flags = 0;
+ r = evdns_getaddrinfo(dns_base, "v6only.example.com", "8002",
+ &hints, gai_cb, &a_out[2]);
+ tt_assert(r);
+
+ /* 3: PF_INET request for v4assert.example.com should not generate a
+ * v6 request. The server will fail the test if it does. */
+ hints.ai_family = PF_INET;
+ r = evdns_getaddrinfo(dns_base, "v4assert.example.com", "8003",
+ &hints, gai_cb, &a_out[3]);
+ tt_assert(r);
+
+ /* 4: PF_INET6 request for v6assert.example.com should not generate a
+ * v4 request. The server will fail the test if it does. */
+ hints.ai_family = PF_INET6;
+ r = evdns_getaddrinfo(dns_base, "v6assert.example.com", "8004",
+ &hints, gai_cb, &a_out[4]);
+ tt_assert(r);
+
+ /* 5: PF_INET request for nosuchplace.example.com should give NEXIST. */
+ hints.ai_family = PF_INET;
+ r = evdns_getaddrinfo(dns_base, "nosuchplace.example.com", "8005",
+ &hints, gai_cb, &a_out[5]);
+ tt_assert(r);
+
+ /* 6: PF_UNSPEC request for nosuchplace.example.com should give NEXIST.
+ */
+ hints.ai_family = PF_UNSPEC;
+ r = evdns_getaddrinfo(dns_base, "nosuchplace.example.com", "8006",
+ &hints, gai_cb, &a_out[6]);
+ tt_assert(r);
+
+ /* 7: PF_UNSPEC request for v6timeout.example.com should give an ipv4
+ * address only. */
+ hints.ai_family = PF_UNSPEC;
+ r = evdns_getaddrinfo(dns_base, "v6timeout.example.com", "8007",
+ &hints, gai_cb, &a_out[7]);
+ tt_assert(r);
+
+ /* 8: PF_UNSPEC request for v6timeout-nonexist.example.com should give
+ * a NEXIST */
+ hints.ai_family = PF_UNSPEC;
+ r = evdns_getaddrinfo(dns_base, "v6timeout-nonexist.example.com",
+ "8008", &hints, gai_cb, &a_out[8]);
+ tt_assert(r);
+
+ /* 9: AI_ADDRCONFIG should at least not crash. Can't test it more
+ * without knowing what kind of internet we have. */
+ hints.ai_flags |= EVUTIL_AI_ADDRCONFIG;
+ r = evdns_getaddrinfo(dns_base, "both.example.com",
+ "8009", &hints, gai_cb, &a_out[9]);
+ tt_assert(r);
+
+ /* 10: PF_UNSPEC for v4timeout.example.com should give an ipv6 address
+ * only. */
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_flags = 0;
+ r = evdns_getaddrinfo(dns_base, "v4timeout.example.com", "8010",
+ &hints, gai_cb, &a_out[10]);
+ tt_assert(r);
+
+ /* 11: timeout.example.com: cancel it after 100 msec. */
+ r = evdns_getaddrinfo(dns_base, "all-timeout.example.com", "8011",
+ &hints, gai_cb, &a_out[11]);
+ tt_assert(r);
+ {
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 100*1000; /* 100 msec */
+ event_base_once(data->base, -1, EV_TIMEOUT, cancel_gai_cb,
+ r, &tv);
+ }
+
+ /* XXXXX There are more tests we could do, including:
+
+ - A test to elicit NODATA.
+
+ */
+
+ n_gai_results_pending = 12;
+ exit_base_on_no_pending_results = data->base;
+
+ event_base_dispatch(data->base);
+
+ /* 0: both.example.com */
+ tt_int_op(a_out[0].err, ==, 0);
+ tt_assert(a_out[0].ai);
+ tt_assert(a_out[0].ai->ai_next);
+ tt_assert(!a_out[0].ai->ai_next->ai_next);
+ a = ai_find_by_family(a_out[0].ai, PF_INET);
+ tt_assert(a);
+ test_ai_eq(a, "80.80.32.32:8000", SOCK_STREAM, IPPROTO_TCP);
+ a = ai_find_by_family(a_out[0].ai, PF_INET6);
+ tt_assert(a);
+ test_ai_eq(a, "[80ff::bbbb]:8000", SOCK_STREAM, IPPROTO_TCP);
+ tt_assert(a_out[0].ai->ai_canonname);
+ tt_str_op(a_out[0].ai->ai_canonname, ==, "both-canonical.example.com");
+
+ /* 1: v4only.example.com */
+ tt_int_op(a_out[1].err, ==, 0);
+ tt_assert(a_out[1].ai);
+ tt_assert(! a_out[1].ai->ai_next);
+ test_ai_eq(a_out[1].ai, "18.52.86.120:8001", SOCK_STREAM, IPPROTO_TCP);
+ tt_assert(a_out[1].ai->ai_canonname == NULL);
+
+
+ /* 2: v6only.example.com */
+ tt_int_op(a_out[2].err, ==, 0);
+ tt_assert(a_out[2].ai);
+ tt_assert(! a_out[2].ai->ai_next);
+ test_ai_eq(a_out[2].ai, "[b0b::f00d]:8002", SOCK_STREAM, IPPROTO_TCP);
+
+ /* 3: v4assert.example.com */
+ tt_int_op(a_out[3].err, ==, 0);
+ tt_assert(a_out[3].ai);
+ tt_assert(! a_out[3].ai->ai_next);
+ test_ai_eq(a_out[3].ai, "18.52.86.120:8003", SOCK_STREAM, IPPROTO_TCP);
+
+ /* 4: v6assert.example.com */
+ tt_int_op(a_out[4].err, ==, 0);
+ tt_assert(a_out[4].ai);
+ tt_assert(! a_out[4].ai->ai_next);
+ test_ai_eq(a_out[4].ai, "[b0b::f00d]:8004", SOCK_STREAM, IPPROTO_TCP);
+
+ /* 5: nosuchplace.example.com (inet) */
+ tt_int_op(a_out[5].err, ==, EVUTIL_EAI_NONAME);
+ tt_assert(! a_out[5].ai);
+
+ /* 6: nosuchplace.example.com (unspec) */
+ tt_int_op(a_out[6].err, ==, EVUTIL_EAI_NONAME);
+ tt_assert(! a_out[6].ai);
+
+ /* 7: v6timeout.example.com */
+ tt_int_op(a_out[7].err, ==, 0);
+ tt_assert(a_out[7].ai);
+ tt_assert(! a_out[7].ai->ai_next);
+ test_ai_eq(a_out[7].ai, "171.205.239.1:8007", SOCK_STREAM, IPPROTO_TCP);
+
+ /* 8: v6timeout-nonexist.example.com */
+ tt_int_op(a_out[8].err, ==, EVUTIL_EAI_NONAME);
+ tt_assert(! a_out[8].ai);
+
+ /* 9: both (ADDRCONFIG) */
+ tt_int_op(a_out[9].err, ==, 0);
+ tt_assert(a_out[9].ai);
+ a = ai_find_by_family(a_out[9].ai, PF_INET);
+ if (a)
+ test_ai_eq(a, "80.80.32.32:8009", SOCK_STREAM, IPPROTO_TCP);
+ else
+ tt_assert(ai_find_by_family(a_out[9].ai, PF_INET6));
+ a = ai_find_by_family(a_out[9].ai, PF_INET6);
+ if (a)
+ test_ai_eq(a, "[80ff::bbbb]:8009", SOCK_STREAM, IPPROTO_TCP);
+ else
+ tt_assert(ai_find_by_family(a_out[9].ai, PF_INET));
+
+ /* 10: v4timeout.example.com */
+ tt_int_op(a_out[10].err, ==, 0);
+ tt_assert(a_out[10].ai);
+ tt_assert(! a_out[10].ai->ai_next);
+ test_ai_eq(a_out[10].ai, "[a0a::ff01]:8010", SOCK_STREAM, IPPROTO_TCP);
+
+ /* 11: cancelled request. */
+ tt_int_op(a_out[11].err, ==, EVUTIL_EAI_CANCEL);
+ tt_assert(a_out[11].ai == NULL);
+
+end:
+ if (local_outcome.ai)
+ evutil_freeaddrinfo(local_outcome.ai);
+ for (i=0;i<10;++i) {
+ if (a_out[i].ai)
+ evutil_freeaddrinfo(a_out[i].ai);
+ }
+ if (port)
+ evdns_close_server_port(port);
+ if (dns_base)
+ evdns_base_free(dns_base, 0);
+}
+
+struct gaic_request_status {
+ int magic;
+ struct event_base *base;
+ struct evdns_base *dns_base;
+ struct evdns_getaddrinfo_request *request;
+ struct event cancel_event;
+ int canceled;
+};
+
+#define GAIC_MAGIC 0x1234abcd
+
+static int pending = 0;
+
+static void
+gaic_cancel_request_cb(evutil_socket_t fd, short what, void *arg)
+{
+ struct gaic_request_status *status = arg;
+
+ tt_assert(status->magic == GAIC_MAGIC);
+ status->canceled = 1;
+ evdns_getaddrinfo_cancel(status->request);
+ return;
+end:
+ event_base_loopexit(status->base, NULL);
+}
+
+static void
+gaic_server_cb(struct evdns_server_request *req, void *arg)
+{
+ ev_uint32_t answer = 0x7f000001;
+ tt_assert(req->nquestions);
+ evdns_server_request_add_a_reply(req, req->questions[0]->name, 1,
+ &answer, 100);
+ evdns_server_request_respond(req, 0);
+ return;
+end:
+ evdns_server_request_respond(req, DNS_ERR_REFUSED);
+}
+
+
+static void
+gaic_getaddrinfo_cb(int result, struct evutil_addrinfo *res, void *arg)
+{
+ struct gaic_request_status *status = arg;
+ struct event_base *base = status->base;
+ tt_assert(status->magic == GAIC_MAGIC);
+
+ if (result == EVUTIL_EAI_CANCEL) {
+ tt_assert(status->canceled);
+ }
+ event_del(&status->cancel_event);
+
+ memset(status, 0xf0, sizeof(*status));
+ free(status);
+
+end:
+ if (--pending <= 0)
+ event_base_loopexit(base, NULL);
+}
+
+static void
+gaic_launch(struct event_base *base, struct evdns_base *dns_base)
+{
+ struct gaic_request_status *status = calloc(1,sizeof(*status));
+ struct timeval tv = { 0, 10000 };
+ status->magic = GAIC_MAGIC;
+ status->base = base;
+ status->dns_base = dns_base;
+ event_assign(&status->cancel_event, base, -1, 0, gaic_cancel_request_cb,
+ status);
+ status->request = evdns_getaddrinfo(dns_base,
+ "foobar.bazquux.example.com", "80", NULL, gaic_getaddrinfo_cb,
+ status);
+ event_add(&status->cancel_event, &tv);
+ ++pending;
+}
+
+static void
+test_getaddrinfo_async_cancel_stress(void *arg)
+{
+ struct basic_test_data *data = arg;
+ struct event_base *base = data->base;
+ struct evdns_base *dns_base = NULL;
+ struct evdns_server_port *server = NULL;
+ evutil_socket_t fd = -1;
+ struct sockaddr_in sin;
+ struct sockaddr_storage ss;
+ ev_socklen_t slen;
+ int i;
+
+ base = event_base_new();
+ dns_base = evdns_base_new(base, 0);
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_port = 0;
+ sin.sin_addr.s_addr = htonl(0x7f000001);
+ if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ tt_abort_perror("socket");
+ }
+ evutil_make_socket_nonblocking(fd);
+ if (bind(fd, (struct sockaddr*)&sin, sizeof(sin))<0) {
+ tt_abort_perror("bind");
+ }
+ server = evdns_add_server_port_with_base(base, fd, 0, gaic_server_cb,
+ base);
+
+ memset(&ss, 0, sizeof(ss));
+ slen = sizeof(ss);
+ if (getsockname(fd, (struct sockaddr*)&ss, &slen)<0) {
+ tt_abort_perror("getsockname");
+ }
+ evdns_base_nameserver_sockaddr_add(dns_base,
+ (struct sockaddr*)&ss, slen, 0);
+
+ for (i = 0; i < 1000; ++i) {
+ gaic_launch(base, dns_base);
+ }
+
+ event_base_dispatch(base);
+
+end:
+ if (dns_base)
+ evdns_base_free(dns_base, 1);
+ if (server)
+ evdns_close_server_port(server);
+ if (fd >= 0)
+ evutil_closesocket(fd);
+}
+
+
+#define DNS_LEGACY(name, flags) \
+ { #name, run_legacy_test_fn, flags|TT_LEGACY, &legacy_setup, \
+ dns_##name }
+
+struct testcase_t dns_testcases[] = {
+ DNS_LEGACY(server, TT_FORK|TT_NEED_BASE),
+ DNS_LEGACY(gethostbyname, TT_FORK|TT_NEED_BASE|TT_NEED_DNS),
+ DNS_LEGACY(gethostbyname6, TT_FORK|TT_NEED_BASE|TT_NEED_DNS),
+ DNS_LEGACY(gethostbyaddr, TT_FORK|TT_NEED_BASE|TT_NEED_DNS),
+ { "resolve_reverse", dns_resolve_reverse, TT_FORK, NULL, NULL },
+ { "search", dns_search_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ { "search_cancel", dns_search_cancel_test,
+ TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ { "retry", dns_retry_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ { "reissue", dns_reissue_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ { "inflight", dns_inflight_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ { "bufferevent_connect_hostname", test_bufferevent_connect_hostname,
+ TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+
+ { "getaddrinfo_async", test_getaddrinfo_async,
+ TT_FORK|TT_NEED_BASE, &basic_setup, (char*)"" },
+ { "getaddrinfo_cancel_stress", test_getaddrinfo_async_cancel_stress,
+ TT_FORK|TT_NEED_BASE, &basic_setup, (char*)"" },
+
+ END_OF_TESTCASES
+};
+
projects / netatalk.git / blobdiff