mirror of
https://github.com/yarrick/iodine.git
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246 lines
6.7 KiB
C
246 lines
6.7 KiB
C
/*
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* Copyright (c) 2006 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 "test.h"
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static void dump_packet(char *, size_t);
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static char queryPacket[] =
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"\x05\x39\x01\x00\x00\x01\x00\x00\x00\x00\x00\x01\x32\x41\x4A\x42\x43"
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"\x55\x59\x54\x43\x50\x45\x42\x39\x47\x51\x39\x4C\x54\x45\x42\x55\x58"
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"\x47\x49\x44\x55\x4E\x42\x53\x53\x41\x36\x44\x46\x4F\x4E\x39\x43\x41"
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"\x5A\x44\x42\x32\x41\x41\x41\x41\x41\x36\x44\x42\x04\x6B\x72\x79\x6F"
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"\x02\x73\x65\x00\x00\x0A\x00\x01\x00\x00\x29\x10\x00\x00\x00\x80\x00"
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"\x00\x00";
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static char answerPacket[] =
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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 *msgData = "this is the message to be delivered";
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static char *topdomain = "kryo.se";
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static char *queryData = "HELLO this is the test data";
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static char *recData = "AHELLO this is the test data"; // The A flag is added
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START_TEST(test_encode_hostname)
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{
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char out[] = "\x06" "BADGER\x06" "BADGER\x04" "KRYO\x02" "SE\x00";
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char buf[256];
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int len;
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int ret;
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len = 256;
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memset(buf, 0, 256);
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ret = dns_encode_hostname("BADGER.BADGER.KRYO.SE", buf, len);
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fail_unless(strncmp(buf, out, ret) == 0, "Happy flow failed");
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}
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END_TEST
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START_TEST(test_encode_hostname_nodot)
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{
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char buf[256];
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int len;
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int ret;
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len = 256;
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memset(buf, 0, 256);
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ret = dns_encode_hostname( // More than 63 chars between dots
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"ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZ"
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, buf, len);
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fail_unless(ret == -1, NULL);
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}
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END_TEST
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START_TEST(test_encode_hostname_toolong)
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{
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char buf[256];
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int len;
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int ret;
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len = 256;
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memset(buf, 0, 256);
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ret = dns_encode_hostname( // More chars than fits into array
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ.ABCDEFGHIJKLMNOPQRSTUVWXYZ."
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ.ABCDEFGHIJKLMNOPQRSTUVWXYZ."
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ.ABCDEFGHIJKLMNOPQRSTUVWXYZ."
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ.ABCDEFGHIJKLMNOPQRSTUVWXYZ."
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ.ABCDEFGHIJKLMNOPQRSTUVWXYZ."
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ.ABCDEFGHIJKLMNOPQRSTUVWXYZ."
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, buf, len);
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fail_unless(ret == -1, NULL);
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fail_unless(strlen(buf) < len, NULL);
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}
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END_TEST
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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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char *host = "kryo.se";
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struct query q;
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char *d;
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int len;
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int pos;
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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(&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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encode_data(queryData, strlen(queryData), 100, d);
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pos = strlen(resolv);
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d += pos;
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if (*d != '.') {
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*d++ = '.';
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}
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strncpy(d, host, strlen(host)+1);
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ret = dns_encode(buf, len, &q, QR_QUERY, resolv, strlen(resolv));
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len = sizeof(queryPacket) - 1; // Skip extra null character
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if (strncmp(queryPacket, buf, sizeof(queryPacket)) || ret != len) {
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printf("\n");
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dump_packet(queryPacket, len);
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dump_packet(buf, ret);
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}
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fail_unless(strncmp(queryPacket, buf, sizeof(queryPacket)) == 0, "Did not compile expected packet");
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fail_unless(ret == len, va_str("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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int len;
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int ret;
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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(queryPacket) - 1;
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dns_decode(buf, sizeof(buf), &q, QR_QUERY, queryPacket, len);
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domain = strstr(q.name, topdomain);
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ret = decode_data(buf, sizeof(buf), q.name, domain);
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fail_unless(strncmp(buf, recData, ret) == 0, "Did not extract expected host: '%s'", buf);
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fail_unless(strlen(buf) == strlen(recData), va_str("Bad host length: %d, expected %d", strlen(q.name), strlen(recData)));
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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(answerPacket) - 1; // Skip extra null character
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fail_unless(strncmp(answerPacket, buf, sizeof(answerPacket)) == 0, "Did not compile expected packet");
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fail_unless(ret == len, va_str("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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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, NULL, QR_ANSWER, answerPacket, sizeof(answerPacket)-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), va_str("Bad data length: %d, expected %d", ret, strlen(msgData)));
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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_hostname);
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tcase_add_test(tc, test_encode_hostname_nodot);
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tcase_add_test(tc, test_encode_hostname_toolong);
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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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return tc;
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}
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