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Implemented resolver to replace sock_srv_lookup()

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This commit is contained in:
Dmitry Podgorny
2015-10-14 18:48:55 +03:00
parent 714b2f9c03
commit b7e308d057
11 changed files with 910 additions and 699 deletions
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56
tests/res_query_dump.c Normal file
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@@ -0,0 +1,56 @@
/* Simple program to dump res_query(3) response. */
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#define STEP 8
int main(int argc, char **argv)
{
unsigned char buf[65536];
char fulldomain[2048];
char *service = "xmpp-client";
char *proto = "tcp";
char *domain = NULL;
int len;
int i;
int j;
if (argc < 2) {
fprintf(stderr, "%s: argument missed\n", argc > 0 ? argv[0] : "$0");
fprintf(stderr, "Usage: %s <domain>\n", argc > 0 ? argv[0] : "$0");
return 1;
}
domain = argv[1];
snprintf(fulldomain, sizeof(fulldomain), "_%s._%s.%s",
service, proto, domain);
errno = 0;
len = res_query(fulldomain, C_IN, T_SRV, buf, sizeof(buf));
if (len < 0) {
fprintf(stderr, "res_query(): Error occured (errno=%d)\n", errno);
}
if (len == 0) {
fprintf(stderr, "res_query(): Empty result\n");
}
if (len > 0) {
printf("/* res_query(\"%s\", C_IN, T_SRV, ...) */\n", fulldomain);
printf("static const unsigned char data[] = {\n");
for (i = 0; i < len; i += STEP) {
printf(" ");
for (j = i; j < len && j < i + STEP; ++j) {
printf(" 0x%02x,", buf[j]);
}
printf("\n");
}
printf("};\n");
}
return len <= 0;
}

139
tests/test_resolver.c Normal file
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@@ -0,0 +1,139 @@
/* test_resolver.c
* strophe XMPP client library -- tests for resolver
*
* Copyright (C) 2015 Dmitry Podgorny <pasis.ua@gmail.com>
*
* This software is provided AS-IS with no warranty, either express
* or implied.
*
* This program is dual licensed under the MIT and GPLv3 licenses.
*/
/* gcc -o test_resolver -I. -I./src tests/test_resolver.c -static -lstrophe */
#include <assert.h>
#include <stdio.h>
#include "resolver.h"
#include "test.h"
/* res_query("_xmpp-client._tcp.jabber.kiev.ua", C_IN, T_SRV, ...) */
static const unsigned char data1[] = {
0x95, 0xf3, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x0c, 0x5f, 0x78, 0x6d,
0x70, 0x70, 0x2d, 0x63, 0x6c, 0x69, 0x65, 0x6e,
0x74, 0x04, 0x5f, 0x74, 0x63, 0x70, 0x06, 0x6a,
0x61, 0x62, 0x62, 0x65, 0x72, 0x04, 0x6b, 0x69,
0x65, 0x76, 0x02, 0x75, 0x61, 0x00, 0x00, 0x21,
0x00, 0x01, 0xc0, 0x0c, 0x00, 0x21, 0x00, 0x01,
0x00, 0x00, 0x00, 0x3b, 0x00, 0x16, 0x00, 0x01,
0x00, 0x00, 0x14, 0x66, 0x06, 0x6a, 0x61, 0x62,
0x62, 0x65, 0x72, 0x04, 0x6b, 0x69, 0x65, 0x76,
0x02, 0x75, 0x61, 0x00,
};
/* res_query("_xmpp-client._tcp.jabber.org", C_IN, T_SRV, ...) */
static const unsigned char data2[] = {
0xf2, 0x98, 0x81, 0x80, 0x00, 0x01, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x0c, 0x5f, 0x78, 0x6d,
0x70, 0x70, 0x2d, 0x63, 0x6c, 0x69, 0x65, 0x6e,
0x74, 0x04, 0x5f, 0x74, 0x63, 0x70, 0x06, 0x6a,
0x61, 0x62, 0x62, 0x65, 0x72, 0x03, 0x6f, 0x72,
0x67, 0x00, 0x00, 0x21, 0x00, 0x01, 0xc0, 0x0c,
0x00, 0x21, 0x00, 0x01, 0x00, 0x00, 0x03, 0x83,
0x00, 0x1a, 0x00, 0x1e, 0x00, 0x1e, 0x14, 0x66,
0x07, 0x68, 0x65, 0x72, 0x6d, 0x65, 0x73, 0x32,
0x06, 0x6a, 0x61, 0x62, 0x62, 0x65, 0x72, 0x03,
0x6f, 0x72, 0x67, 0x00, 0xc0, 0x0c, 0x00, 0x21,
0x00, 0x01, 0x00, 0x00, 0x03, 0x83, 0x00, 0x1c,
0x00, 0x1f, 0x00, 0x1e, 0x14, 0x66, 0x09, 0x68,
0x65, 0x72, 0x6d, 0x65, 0x73, 0x32, 0x76, 0x36,
0x06, 0x6a, 0x61, 0x62, 0x62, 0x65, 0x72, 0x03,
0x6f, 0x72, 0x67, 0x00,
};
/* res_query("_xmpp-client._tcp.gmail.com", C_IN, T_SRV, ...) */
static const unsigned char data3[] = {
0xda, 0xa8, 0x81, 0x80, 0x00, 0x01, 0x00, 0x05,
0x00, 0x00, 0x00, 0x00, 0x0c, 0x5f, 0x78, 0x6d,
0x70, 0x70, 0x2d, 0x63, 0x6c, 0x69, 0x65, 0x6e,
0x74, 0x04, 0x5f, 0x74, 0x63, 0x70, 0x05, 0x67,
0x6d, 0x61, 0x69, 0x6c, 0x03, 0x63, 0x6f, 0x6d,
0x00, 0x00, 0x21, 0x00, 0x01, 0xc0, 0x0c, 0x00,
0x21, 0x00, 0x01, 0x00, 0x00, 0x02, 0x43, 0x00,
0x1e, 0x00, 0x14, 0x00, 0x00, 0x14, 0x66, 0x04,
0x61, 0x6c, 0x74, 0x31, 0x04, 0x78, 0x6d, 0x70,
0x70, 0x01, 0x6c, 0x06, 0x67, 0x6f, 0x6f, 0x67,
0x6c, 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0xc0,
0x0c, 0x00, 0x21, 0x00, 0x01, 0x00, 0x00, 0x02,
0x43, 0x00, 0x1e, 0x00, 0x14, 0x00, 0x00, 0x14,
0x66, 0x04, 0x61, 0x6c, 0x74, 0x34, 0x04, 0x78,
0x6d, 0x70, 0x70, 0x01, 0x6c, 0x06, 0x67, 0x6f,
0x6f, 0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f, 0x6d,
0x00, 0xc0, 0x0c, 0x00, 0x21, 0x00, 0x01, 0x00,
0x00, 0x02, 0x43, 0x00, 0x1e, 0x00, 0x14, 0x00,
0x00, 0x14, 0x66, 0x04, 0x61, 0x6c, 0x74, 0x32,
0x04, 0x78, 0x6d, 0x70, 0x70, 0x01, 0x6c, 0x06,
0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x03, 0x63,
0x6f, 0x6d, 0x00, 0xc0, 0x0c, 0x00, 0x21, 0x00,
0x01, 0x00, 0x00, 0x02, 0x43, 0x00, 0x19, 0x00,
0x05, 0x00, 0x00, 0x14, 0x66, 0x04, 0x78, 0x6d,
0x70, 0x70, 0x01, 0x6c, 0x06, 0x67, 0x6f, 0x6f,
0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00,
0xc0, 0x0c, 0x00, 0x21, 0x00, 0x01, 0x00, 0x00,
0x02, 0x43, 0x00, 0x1e, 0x00, 0x14, 0x00, 0x00,
0x14, 0x66, 0x04, 0x61, 0x6c, 0x74, 0x33, 0x04,
0x78, 0x6d, 0x70, 0x70, 0x01, 0x6c, 0x06, 0x67,
0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f,
0x6d, 0x00,
};
static const struct {
const unsigned char *data;
size_t len;
char *target;
unsigned short port;
} tests[] = {
{
.data = data1,
.len = sizeof(data1),
.target = "jabber.kiev.ua",
.port = 5222,
},
{
.data = data2,
.len = sizeof(data2),
.target = "hermes2.jabber.org",
.port = 5222,
},
{
.data = data3,
.len = sizeof(data3),
.target = "xmpp.l.google.com",
.port = 5222,
},
};
int main(int argc, char **argv)
{
char domain[2048];
unsigned short port;
size_t i;
int ret;
printf("resolver_srv_lookup_buf() tests.\n");
for (i = 0; i < ARRAY_SIZE(tests); ++i) {
printf("Test #%zu: ", i + 1);
memset(domain, 'x', sizeof(domain));
ret = resolver_srv_lookup_buf(tests[i].data, tests[i].len,
domain, sizeof(domain), &port);
assert(ret == 1);
COMPARE(tests[i].target, domain);
if (tests[i].port != port) {
printf("fail! got port=%u, but should be %u\n",
(unsigned)port, (unsigned)tests[i].port);
return 1;
}
printf("ok\n");
}
return 0;
}