mirror of
https://github.com/yarrick/iodine.git
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253 lines
7.1 KiB
C
253 lines
7.1 KiB
C
/*
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* Copyright (c) 2006-2009 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <check.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/stat.h>
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#include <arpa/nameser.h>
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#include "common.h"
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#include "dns.h"
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#include "encoding.h"
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#include "base32.h"
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#include "test.h"
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static void dump_packet(char *, size_t);
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static char query_packet[] =
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"\x05\x39\x01\x00\x00\x01\x00\x00\x00\x00\x00\x01\x2D\x41\x6A\x62\x63"
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"\x75\x79\x74\x63\x70\x65\x62\x30\x67\x71\x30\x6C\x74\x65\x62\x75\x78"
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"\x67\x69\x64\x75\x6E\x62\x73\x73\x61\x33\x64\x66\x6F\x6E\x30\x63\x61"
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"\x7A\x64\x62\x6F\x72\x71\x71\x04\x6B\x72\x79\x6F\x02\x73\x65\x00\x00"
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"\x0A\x00\x01\x00\x00\x29\x10\x00\x00\x00\x80\x00\x00\x00";
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static char answer_packet[] =
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"\x05\x39\x84\x00\x00\x01\x00\x01\x00\x00\x00\x00\x05\x73\x69\x6C\x6C"
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"\x79\x04\x68\x6F\x73\x74\x02\x6F\x66\x06\x69\x6F\x64\x69\x6E\x65\x04"
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"\x63\x6F\x64\x65\x04\x6B\x72\x79\x6F\x02\x73\x65\x00\x00\x0A\x00\x01"
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"\xC0\x0C\x00\x0A\x00\x01\x00\x00\x00\x00\x00\x23\x74\x68\x69\x73\x20"
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"\x69\x73\x20\x74\x68\x65\x20\x6D\x65\x73\x73\x61\x67\x65\x20\x74\x6F"
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"\x20\x62\x65\x20\x64\x65\x6C\x69\x76\x65\x72\x65\x64";
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static char answer_packet_high_trans_id[] =
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"\x85\x39\x84\x00\x00\x01\x00\x01\x00\x00\x00\x00\x05\x73\x69\x6C\x6C"
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"\x79\x04\x68\x6F\x73\x74\x02\x6F\x66\x06\x69\x6F\x64\x69\x6E\x65\x04"
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"\x63\x6F\x64\x65\x04\x6B\x72\x79\x6F\x02\x73\x65\x00\x00\x0A\x00\x01"
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"\xC0\x0C\x00\x0A\x00\x01\x00\x00\x00\x00\x00\x23\x74\x68\x69\x73\x20"
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"\x69\x73\x20\x74\x68\x65\x20\x6D\x65\x73\x73\x61\x67\x65\x20\x74\x6F"
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"\x20\x62\x65\x20\x64\x65\x6C\x69\x76\x65\x72\x65\x64";
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static char *msgData = "this is the message to be delivered";
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static char *topdomain = "kryo.se";
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static char *innerData = "HELLO this is the test data";
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START_TEST(test_encode_query)
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{
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char buf[512];
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char resolv[512];
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struct query q;
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struct encoder *enc;
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char *d;
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size_t len;
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size_t enclen;
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int ret;
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enclen = sizeof(resolv);
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memset(&buf, 0, sizeof(buf));
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memset(&resolv, 0, sizeof(resolv));
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memset(&q, 0, sizeof(struct query));
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q.type = T_NULL;
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q.id = 1337;
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d = resolv;
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enc = get_base32_encoder();
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*d++ = 'A';
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enc->encode(d, &enclen, innerData, strlen(innerData));
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d = resolv + strlen(resolv);
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if (*d != '.') {
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*d++ = '.';
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}
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strcpy(d, topdomain);
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len = sizeof(buf);
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ret = dns_encode(buf, len, &q, QR_QUERY, resolv, strlen(resolv));
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len = sizeof(query_packet) - 1; /* Skip extra null character */
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if (strncmp(query_packet, buf, sizeof(query_packet)) || ret != len) {
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printf("\n");
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dump_packet(query_packet, len);
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dump_packet(buf, ret);
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}
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fail_unless(strncmp(query_packet, buf, sizeof(query_packet)) == 0, "Did not compile expected packet");
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fail_unless(ret == len, "Bad packet length: %d, expected %d", ret, len);
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}
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END_TEST
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START_TEST(test_decode_query)
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{
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char buf[512];
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char *domain;
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struct query q;
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struct encoder *enc;
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size_t len;
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memset(&q, 0, sizeof(struct query));
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memset(&buf, 0, sizeof(buf));
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q.id = 0;
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len = sizeof(query_packet) - 1;
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enc = get_base32_encoder();
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dns_decode(buf, sizeof(buf), &q, QR_QUERY, query_packet, len);
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domain = strstr(q.name, topdomain);
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len = sizeof(buf);
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unpack_data(buf, len, &(q.name[1]), (int) (domain - q.name) - 1, enc);
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fail_unless(strncmp(buf, innerData, strlen(innerData)) == 0, "Did not extract expected host: '%s'", buf);
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fail_unless(strlen(buf) == strlen(innerData), "Bad host length: %d, expected %d: '%s'", strlen(buf), strlen(innerData), buf);
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}
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END_TEST
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START_TEST(test_encode_response)
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{
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char buf[512];
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char *host = "silly.host.of.iodine.code.kryo.se";
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struct query q;
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int len;
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int ret;
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len = sizeof(buf);
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memset(&buf, 0, sizeof(buf));
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memset(&q, 0, sizeof(struct query));
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strncpy(q.name, host, strlen(host));
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q.type = T_NULL;
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q.id = 1337;
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ret = dns_encode(buf, len, &q, QR_ANSWER, msgData, strlen(msgData));
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len = sizeof(answer_packet) - 1; /* Skip extra null character */
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fail_unless(strncmp(answer_packet, buf, sizeof(answer_packet)) == 0, "Did not compile expected packet");
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fail_unless(ret == len, "Bad packet length: %d, expected %d", ret, len);
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}
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END_TEST
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START_TEST(test_decode_response)
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{
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char buf[512];
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struct query q;
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int len;
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int ret;
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len = sizeof(buf);
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memset(&buf, 0, sizeof(buf));
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ret = dns_decode(buf, len, &q, QR_ANSWER, answer_packet, sizeof(answer_packet)-1);
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fail_unless(strncmp(msgData, buf, sizeof(msgData)) == 0, "Did not extract expected data");
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fail_unless(ret == strlen(msgData), "Bad data length: %d, expected %d", ret, strlen(msgData));
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fail_unless(q.id == 0x0539);
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}
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END_TEST
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START_TEST(test_decode_response_with_high_trans_id)
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{
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char buf[512];
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struct query q;
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int len;
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int ret;
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len = sizeof(buf);
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memset(&buf, 0, sizeof(buf));
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ret = dns_decode(buf, len, &q, QR_ANSWER, answer_packet_high_trans_id, sizeof(answer_packet_high_trans_id)-1);
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fail_unless(strncmp(msgData, buf, sizeof(msgData)) == 0, "Did not extract expected data");
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fail_unless(ret == strlen(msgData), "Bad data length: %d, expected %d", ret, strlen(msgData));
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fail_unless(q.id == 0x8539, "q.id was %08X instead of %08X!", q.id, 0x8539);
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}
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END_TEST
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START_TEST(test_get_id_short_packet)
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{
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char buf[5];
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int len;
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unsigned short id;
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len = sizeof(buf);
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memset(&buf, 5, sizeof(buf));
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id = dns_get_id(buf, len);
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fail_unless(id == 0);
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}
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END_TEST
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START_TEST(test_get_id_low)
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{
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unsigned short id;
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id = dns_get_id(answer_packet, sizeof(answer_packet));
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fail_unless(id == 1337);
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}
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END_TEST
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START_TEST(test_get_id_high)
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{
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unsigned short id;
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id = dns_get_id(answer_packet_high_trans_id, sizeof(answer_packet_high_trans_id));
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fail_unless(id == 0x8539);
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}
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END_TEST
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static void
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dump_packet(char *buf, size_t len)
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{
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int pos;
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for (pos = 0; pos < len; pos++) {
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printf("\\x%02X", (unsigned char) buf[pos]);
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}
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printf("\n");
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for (pos = 0; pos < len; pos++) {
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if (isalnum((unsigned char) buf[pos])) {
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printf(" %c ", (unsigned char) buf[pos]);
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} else {
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printf(" ");
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}
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}
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printf("\n");
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}
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TCase *
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test_dns_create_tests()
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{
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TCase *tc;
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tc = tcase_create("Dns");
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tcase_add_test(tc, test_encode_query);
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tcase_add_test(tc, test_decode_query);
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tcase_add_test(tc, test_encode_response);
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tcase_add_test(tc, test_decode_response);
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tcase_add_test(tc, test_decode_response_with_high_trans_id);
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tcase_add_test(tc, test_get_id_short_packet);
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tcase_add_test(tc, test_get_id_low);
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tcase_add_test(tc, test_get_id_high);
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return tc;
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}
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