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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:36:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:36:22 +0000 |
commit | b88bb292821fd7742604ec4e280acebd9a049f62 (patch) | |
tree | 625e4e19e6619f7481e5a8103f876520950769f6 /tests/libknot/test_edns.c | |
parent | Initial commit. (diff) | |
download | knot-upstream.tar.xz knot-upstream.zip |
Adding upstream version 3.0.5.upstream/3.0.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/libknot/test_edns.c')
-rw-r--r-- | tests/libknot/test_edns.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/tests/libknot/test_edns.c b/tests/libknot/test_edns.c new file mode 100644 index 0000000..d2b4fd8 --- /dev/null +++ b/tests/libknot/test_edns.c @@ -0,0 +1,502 @@ +/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <tap/basic.h> + +#include <assert.h> +#include "libknot/libknot.h" +#include "libknot/rrtype/opt.h" +#include "libknot/descriptor.h" +#include "libknot/wire.h" +#include "contrib/sockaddr.h" + +static const uint16_t E_MAX_PLD = 10000; +static const uint16_t E_MAX_PLD2 = 20000; +static const uint8_t E_VERSION = 1; +static const uint8_t E_VERSION2 = 2; +static const uint8_t E_RCODE = 0; +static const uint8_t E_RCODE2 = 200; + +static const char *E_NSID_STR = "FooBar"; +static const char *E_NSID_STR2 = "BarFoo"; +static const uint16_t E_NSID_LEN = 6; + +#define E_NSID_SIZE (4 + E_NSID_LEN) + +static const uint16_t E_OPT3_CODE = 15; +static const char *E_OPT3_FAKE_DATA = "Not used"; +static const char *E_OPT3_DATA = NULL; +static const uint16_t E_OPT3_LEN = 0; +static const uint16_t E_OPT3_FAKE_LEN = 8; + +#define E_OPT3_SIZE (4 + E_OPT3_LEN) + +static const uint16_t E_OPT4_CODE = 30; +static const char *E_OPT4_DATA = NULL; +static const uint16_t E_OPT4_LEN = 0; + +#define E_OPT4_SIZE (4 + E_OPT4_LEN) + +enum offsets { + /*! \brief Offset of Extended RCODE in wire order of TTL. */ + OFFSET_ERCODE = 0, + /*! \brief Offset of Version in wire order of TTL. */ + OFFSET_VER = 1, + /*! \brief Offset of Flags in wire order of TTL. */ + OFFSET_FLAGS = 2, + /*! \brief Offset of OPTION code in one OPTION in RDATA. */ + OFFSET_OPT_CODE = 0, + /*! \brief Offset of OPTION size in one OPTION in RDATA. */ + OFFSET_OPT_SIZE = 2, + /*! \brief Offset of OPTION data in one OPTION in RDATA. */ + OFFSET_OPT_DATA = 4 +}; + +static const uint16_t DO_FLAG = (uint16_t)1 << 15; + +static void check_ttl(knot_rrset_t *rrset, uint8_t ext_rcode, uint8_t ver, + uint16_t flags, char *msg) +{ + if (rrset == NULL) { + return; + } + + /* TTL should be stored in machine byte order. + We need network byte order to compare its parts. */ + uint8_t ttl_wire[4] = { 0, 0, 0, 0 }; + knot_wire_write_u32(ttl_wire, rrset->ttl); + + /* Convert Flags from EDNS parameters to wire format for comparison. */ + uint8_t flags_wire[2] = { 0, 0 }; + knot_wire_write_u16(flags_wire, flags); + + /* TTL = Ext RCODE + Version + Flags */ + bool check = (ttl_wire[OFFSET_ERCODE] == ext_rcode); + ok(check, "%s: extended RCODE", msg); + + check = (ttl_wire[OFFSET_VER] == ver); + ok(check, "%s: version", msg); + + check = (memcmp(flags_wire, ttl_wire + OFFSET_FLAGS, 2) == 0); + ok(check, "%s: flags", msg); +} + +static void check_option(knot_rdata_t *rdata, uint16_t opt_code, + uint16_t opt_len, uint8_t *opt_data, char *msg) +{ + assert(rdata != NULL); + + uint8_t *data = rdata->data; + uint16_t data_len = rdata->len; + + /* Check RDLENGTH according to given data length. */ + bool check = (data_len >= 4 + opt_len); + ok(check, "%s: RDLENGTH (%u)", msg, data_len); + + /* Find the desired option. */ + bool found = false; + int pos = 0; + while (pos <= data_len - 4) { + uint16_t code = knot_wire_read_u16(data + pos + OFFSET_OPT_CODE); + if (code == opt_code) { + found = true; + break; + } + uint16_t len = knot_wire_read_u16(data + pos + OFFSET_OPT_SIZE); + pos += 4 + len; + } + + /* Check that the option is present. */ + ok(found, "%s: find OPTION %u in OPT RR", msg, opt_code); + + /* Check that the first OPTION's size si the size of the option data. */ + uint16_t opt_size = knot_wire_read_u16(data + pos + OFFSET_OPT_SIZE); + check = (opt_size == opt_len); + ok(check, "%s: OPTION data size", msg); + + /* Check the actual NSID data. */ + check = (opt_data == 0 || memcmp(data + pos + OFFSET_OPT_DATA, opt_data, opt_len) == 0); + ok(check, "%s: OPTION data", msg); +} + +static void check_header(knot_rrset_t *opt_rr, uint16_t payload, uint8_t ver, + uint16_t flags, uint8_t ext_rcode, char *msg) +{ + assert(opt_rr != NULL); + bool check; + + /* Check values in OPT RR by hand. */ + /* CLASS == Max UDP payload */ + check = (opt_rr->rclass == payload); + ok(check, "%s: max payload", msg); + + /* The OPT RR should have exactly one RDATA. */ + check = (opt_rr->rrs.count == 1); + ok(check, "%s: RR count == 1", msg); + + knot_rdata_t *rdata = opt_rr->rrs.rdata; + check = (rdata != NULL); + ok(check, "%s: RDATA exists", msg); + + check_ttl(opt_rr, ext_rcode, ver, flags, msg); +} + +static void test_getters(knot_rrset_t *opt_rr) +{ + assert(opt_rr != NULL); + + /* These values should be set from the setters test: + * Max UDP payload: E_MAX_PLD2 + * Version: E_VERSION2 + * RCODE: E_RCODE2 + * Flags: E_FLAGS | KNOT_EDNS_FLAG_DO + * OPTIONs: 1) KNOT_EDNS_OPTION_NSID, E_NSID_LEN, E_NSID_STR + * 2) E_OPT3_CODE, 0, 0 + * 3) E_OPT4_CODE, 0, 0 + * 4) KNOT_EDNS_OPTION_NSID, E_NSID_LEN, E_NSID_STR2 + */ + + /* Payload */ + bool check = (knot_edns_get_payload(opt_rr) == E_MAX_PLD2); + ok(check, "OPT RR getters: payload"); + + /* Extended RCODE */ + check = (knot_edns_get_ext_rcode(opt_rr) == E_RCODE2); + ok(check, "OPT RR getters: extended RCODE"); + + /* Extended RCODE */ + check = (knot_edns_get_version(opt_rr) == E_VERSION2); + ok(check, "OPT RR getters: version"); + + /* DO bit */ + check = knot_edns_do(opt_rr); + ok(check, "OPT RR getters: DO bit check"); + + /* Wire size */ + size_t total_size = KNOT_EDNS_MIN_SIZE + + 2 * E_NSID_SIZE + E_OPT3_SIZE + E_OPT4_SIZE; + size_t actual_size = knot_edns_wire_size(opt_rr); + check = actual_size == total_size; + ok(check, "OPT RR getters: wire size (expected: %zu, actual: %zu)", + total_size, actual_size); + + /* NSID */ + uint8_t *nsid1 = knot_edns_get_option(opt_rr, KNOT_EDNS_OPTION_NSID, NULL); + check = nsid1 != NULL; + ok(check, "OPT RR getters: NSID check"); + check = memcmp(knot_edns_opt_get_data(nsid1), E_NSID_STR, knot_edns_opt_get_length(nsid1)) == 0; + ok(check, "OPT RR getters: NSID value check"); + + /* Another NSID */ + uint8_t *nsid2 = knot_edns_get_option(opt_rr, KNOT_EDNS_OPTION_NSID, nsid1); + check = nsid2 != NULL; + ok(check, "OPT RR getters: another NSID check"); + check = memcmp(knot_edns_opt_get_data(nsid2), E_NSID_STR2, knot_edns_opt_get_length(nsid2)) == 0; + ok(check, "OPT RR getters: another NSID value check"); + + /* Other OPTIONs */ + check = knot_edns_get_option(opt_rr, E_OPT3_CODE, NULL) != NULL; + ok(check, "OPT RR getters: empty option 1"); + + check = knot_edns_get_option(opt_rr, E_OPT4_CODE, NULL) != NULL; + ok(check, "OPT RR getters: empty option 2"); + + uint16_t code = knot_edns_opt_get_code((const uint8_t *)"\x00\x0a" "\x00\x00"); + ok(code == KNOT_EDNS_OPTION_COOKIE, "OPT RR getters: EDNS OPT code"); +} + +static void test_setters(knot_rrset_t *opt_rr) +{ + assert(opt_rr != NULL); + + /* Header-related setters. */ + knot_edns_set_payload(opt_rr, E_MAX_PLD2); + knot_edns_set_ext_rcode(opt_rr, E_RCODE2); + knot_edns_set_version(opt_rr, E_VERSION2); + knot_edns_set_do(opt_rr); + + check_header(opt_rr, E_MAX_PLD2, E_VERSION2, DO_FLAG, E_RCODE2, + "OPT RR setters"); + + /* OPTION(RDATA)-related setters. */ + + /* Proper option NSID. */ + int ret = knot_edns_add_option(opt_rr, KNOT_EDNS_OPTION_NSID, + E_NSID_LEN, (uint8_t *)E_NSID_STR, NULL); + is_int(KNOT_EOK, ret, "OPT RR setters: add option with data (ret = %s)", + knot_strerror(ret)); + + /* Wrong argument: no OPT RR. */ + ret = knot_edns_add_option(NULL, E_OPT3_CODE, E_OPT3_FAKE_LEN, + (uint8_t *)E_OPT3_FAKE_DATA, NULL); + is_int(KNOT_EINVAL, ret, "OPT RR setters: add option (rr == NULL) " + "(ret = %s)", knot_strerror(ret)); + + /* Wrong argument: option length != 0 && data == NULL. */ + ret = knot_edns_add_option(opt_rr, E_OPT3_CODE, E_OPT3_FAKE_LEN, NULL, + NULL); + is_int(KNOT_EINVAL, ret, "OPT RR setters: add option (data == NULL, " + "len != 0) (ret = %s)", knot_strerror(ret)); + + /* Empty OPTION (length 0, data != NULL). */ + ret = knot_edns_add_option(opt_rr, E_OPT3_CODE, E_OPT3_LEN, + (uint8_t *)E_OPT3_FAKE_DATA, NULL); + is_int(KNOT_EOK, ret, "OPT RR setters: add empty option 1 (ret = %s)", + knot_strerror(ret)); + + /* Empty OPTION (length 0, data == NULL). */ + ret = knot_edns_add_option(opt_rr, E_OPT4_CODE, E_OPT4_LEN, + (uint8_t *)E_OPT4_DATA, NULL); + is_int(KNOT_EOK, ret, "OPT RR setters: add empty option 2 (ret = %s)", + knot_strerror(ret)); + + /* Another option NSID. */ + ret = knot_edns_add_option(opt_rr, KNOT_EDNS_OPTION_NSID, + E_NSID_LEN, (uint8_t *)E_NSID_STR2, NULL); + is_int(KNOT_EOK, ret, "OPT RR setters: add option with data (ret = %s)", + knot_strerror(ret)); + + knot_rdata_t *rdata = opt_rr->rrs.rdata; + ok(rdata != NULL, "OPT RR setters: non-empty RDATA"); + + /* Check proper option NSID */ + check_option(rdata, KNOT_EDNS_OPTION_NSID, E_NSID_LEN, + (uint8_t *)E_NSID_STR, "OPT RR setters (proper option)"); + + /* Check empty option 1 */ + check_option(rdata, E_OPT3_CODE, E_OPT3_LEN, + (uint8_t *)E_OPT3_DATA, "OPT RR setters (empty option 1)"); + + /* Check empty option 2 */ + check_option(rdata, E_OPT4_CODE, E_OPT4_LEN, + (uint8_t *)E_OPT4_DATA, "OPT RR setters (empty option 2)"); +} + +static void test_alignment(void) +{ + int ret; + + ret = knot_edns_alignment_size(1, 1, 1); + ok(ret == -1, "no alignment"); + + ret = knot_edns_alignment_size(1, 1, 2); + ok(ret == -1, "no alignment"); + + ret = knot_edns_alignment_size(1, 1, 3); + ok(ret == (6 - (1 + 1 + KNOT_EDNS_OPTION_HDRLEN)), "%i-Byte alignment", ret); + + ret = knot_edns_alignment_size(1, 1, 4); + ok(ret == (8 - (1 + 1 + KNOT_EDNS_OPTION_HDRLEN)), "%i-Byte alignment", ret); + + ret = knot_edns_alignment_size(1, 1, 512); + ok(ret == (512 - (1 + 1 + KNOT_EDNS_OPTION_HDRLEN)), "%i-Byte alignment", ret); +} + +static void test_keepalive(void) +{ + typedef struct { + char *msg; + uint16_t opt_len; + char *opt; + uint16_t val; + } test_t; + + // OK tests. + + static const test_t TESTS[] = { + { "ok 0", 0, "", 0 }, + { "ok 1", 2, "\x00\x01", 1 }, + { "ok 258", 2, "\x01\x02", 258 }, + { "ok 65535", 2, "\xFF\xFF", 65535 }, + { NULL } + }; + + for (const test_t *t = TESTS; t->msg != NULL; t++) { + uint16_t len = knot_edns_keepalive_size(t->val); + ok(len == t->opt_len, "%s: %s, size", __func__, t->msg); + + uint8_t wire[8] = { 0 }; + int ret = knot_edns_keepalive_write(wire, sizeof(wire), t->val); + is_int(KNOT_EOK, ret, "%s: %s, write, return", __func__, t->msg); + ok(memcmp(wire, t->opt, t->opt_len) == 0, "%s: %s, write, value", + __func__, t->msg); + + uint16_t timeout = 0; + ret = knot_edns_keepalive_parse(&timeout, (uint8_t *)t->opt, t->opt_len); + is_int(KNOT_EOK, ret, "%s: %s, parse, return", __func__, t->msg); + ok(timeout == t->val, "%s: %s, parse, value", __func__, t->msg); + } + + // Error tests. + + uint8_t wire[8] = { 0 }; + ok(knot_edns_keepalive_write(NULL, 0, 0) == KNOT_EINVAL, + "%s: write, NULL", __func__); + ok(knot_edns_keepalive_write(wire, 1, 1) == KNOT_ESPACE, + "%s: write, no room", __func__); + + uint16_t timeout = 0; + ok(knot_edns_keepalive_parse(NULL, (const uint8_t *)"", 0) == KNOT_EINVAL, + "%s: parse, NULL", __func__); + ok(knot_edns_keepalive_parse(&timeout, NULL, 0) == KNOT_EINVAL, + "%s: parse, NULL", __func__); + ok(knot_edns_keepalive_parse(&timeout, (const uint8_t *)"\x01", 1) == KNOT_EMALF, + "%s: parse, malformed", __func__); +} + +static void test_chain(void) +{ + typedef struct { + char *msg; + uint16_t opt_len; + knot_dname_t *dname; + } test_t; + + // OK tests. + + static const test_t TESTS[] = { + { ".", 1, (knot_dname_t *)"" }, + { "a.", 3, (knot_dname_t *)"\x01" "a" }, + { NULL } + }; + + for (const test_t *t = TESTS; t->msg != NULL; t++) { + uint16_t len = knot_edns_chain_size(t->dname); + ok(len == t->opt_len, "%s: dname %s, size", __func__, t->msg); + + uint8_t wire[8] = { 0 }; + int ret = knot_edns_chain_write(wire, sizeof(wire), t->dname); + is_int(KNOT_EOK, ret, "%s: dname %s, write, return", __func__, t->msg); + ok(memcmp(wire, t->dname, t->opt_len) == 0, "%s: dname %s, write, value", + __func__, t->msg); + + knot_dname_t *dname = NULL; + ret = knot_edns_chain_parse(&dname, (uint8_t *)t->dname, t->opt_len, NULL); + is_int(KNOT_EOK, ret, "%s: dname %s, parse, return", __func__, t->msg); + ok(knot_dname_is_equal(dname, t->dname), "%s: dname %s, parse, value", + __func__, t->msg); + knot_dname_free(dname, NULL); + } + + // Error tests. + + ok(knot_edns_chain_size(NULL) == 0, "%s: size, NULL", __func__); + + uint8_t wire[8] = { 0 }; + ok(knot_edns_chain_write(NULL, 0, wire) == KNOT_EINVAL, + "%s: write, NULL", __func__); + ok(knot_edns_chain_write(wire, 0, NULL) == KNOT_EINVAL, + "%s: write, NULL", __func__); + ok(knot_edns_chain_write(wire, 0, (const knot_dname_t *)"") == KNOT_ESPACE, + "%s: write, no room", __func__); + + knot_dname_t *dname = NULL; + ok(knot_edns_chain_parse(NULL, wire, 0, NULL) == KNOT_EINVAL && dname == NULL, + "%s: parse, NULL", __func__); + ok(knot_edns_chain_parse(&dname, NULL, 0, NULL) == KNOT_EINVAL && dname == NULL, + "%s: parse, NULL", __func__); + ok(knot_edns_chain_parse(&dname, (const uint8_t *)"\x01", 1, NULL) == KNOT_EMALF && + dname == NULL, "%s: parse, malformed", __func__); +} + +static void check_cookie_parse(const char *opt, knot_edns_cookie_t *cc, + knot_edns_cookie_t *sc, int code, const char *msg) +{ + const uint8_t *data = NULL; + uint16_t data_len = 0; + if (opt != NULL) { + data = knot_edns_opt_get_data((uint8_t *)opt); + data_len = knot_edns_opt_get_length((uint8_t *)opt); + } + + int ret = knot_edns_cookie_parse(cc, sc, data, data_len); + is_int(code, ret, "cookie parse ret: %s", msg); +} + +static void ok_cookie_check(const char *opt, knot_edns_cookie_t *cc, + knot_edns_cookie_t *sc, uint16_t cc_len, uint16_t sc_len, + const char *msg) +{ + check_cookie_parse(opt, cc, sc, KNOT_EOK, msg); + + is_int(cc->len, cc_len, "cookie parse cc len: %s", msg); + is_int(sc->len, sc_len, "cookie parse cc len: %s", msg); + + uint16_t size = knot_edns_cookie_size(cc, sc); + is_int(size, cc_len + sc_len, "cookie len: %s", msg); + + uint8_t buf[64]; + int ret = knot_edns_cookie_write(buf, sizeof(buf), cc, sc); + is_int(KNOT_EOK, ret, "cookie write ret: %s", msg); +} + +static void test_cookie(void) +{ + const char *good[] = { + "\x00\x0a" "\x00\x08" "\x00\x01\x02\x03\x04\x05\x06\x07", /* Only client cookie. */ + "\x00\x0a" "\x00\x10" "\x00\x01\x02\x03\x04\x05\x06\x07" "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f", /* 8 octets long server cookie. */ + "\x00\x0a" "\x00\x28" "\x00\x01\x02\x03\x04\x05\x06\x07" "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20\x21\x22\x23\x24\x25\x26\x27" /* 32 octets long server cookie. */ + }; + + const char *bad[] = { + "\x00\x0a" "\x00\x00", /* Zero length cookie. */ + "\x00\x0a" "\x00\x01" "\x00", /* Short client cookie. */ + "\x00\x0a" "\x00\x07" "\x00\x01\x02\x03\x04\x05\x06", /* Short client cookie. */ + "\x00\x0a" "\x00\x09" "\x00\x01\x02\x03\x04\x05\x06\x07" "\x08", /* Short server cookie. */ + "\x00\x0a" "\x00\x0f" "\x00\x01\x02\x03\x04\x05\x06\x07" "\x08\x09\x0a\x0b\x0c\x0d\x0e", /* Short server cookie. */ + "\x00\x0a" "\x00\x29" "\x00\x01\x02\x03\x04\x05\x06\x07" "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20\x21\x22\x23\x24\x25\x26\x27\x28", /* Long server cookie. */ + }; + + knot_edns_cookie_t cc, sc; + + ok_cookie_check(good[0], &cc, &sc, 8, 0, "good cookie 0"); + ok_cookie_check(good[1], &cc, &sc, 8, 8, "good cookie 1"); + ok_cookie_check(good[2], &cc, &sc, 8, 32, "good cookie 2"); + + check_cookie_parse(NULL, &cc, &sc, KNOT_EINVAL, "no data"); + check_cookie_parse(good[0], NULL, &sc, KNOT_EINVAL, "no client cookie"); + check_cookie_parse(good[1], &cc, NULL, KNOT_EINVAL, "no server cookie"); + + check_cookie_parse(bad[0], &cc, &sc, KNOT_EMALF, "bad cookie 0"); + check_cookie_parse(bad[1], &cc, &sc, KNOT_EMALF, "bad cookie 1"); + check_cookie_parse(bad[2], &cc, &sc, KNOT_EMALF, "bad cookie 2"); + check_cookie_parse(bad[3], &cc, &sc, KNOT_EMALF, "bad cookie 3"); + check_cookie_parse(bad[4], &cc, &sc, KNOT_EMALF, "bad cookie 4"); + check_cookie_parse(bad[5], &cc, &sc, KNOT_EMALF, "bad cookie 5"); +} + +int main(int argc, char *argv[]) +{ + plan_lazy(); + + knot_rrset_t opt_rr; + int ret = knot_edns_init(&opt_rr, E_MAX_PLD, E_RCODE, E_VERSION, NULL); + is_int(KNOT_EOK, ret, "OPT RR: init"); + + /* Check initialized values (no NSID yet). */ + check_header(&opt_rr, E_MAX_PLD, E_VERSION, 0, E_RCODE, "OPT RR: check header"); + + test_setters(&opt_rr); + test_getters(&opt_rr); + test_alignment(); + test_keepalive(); + test_chain(); + test_cookie(); + + knot_rrset_clear(&opt_rr, NULL); + + return 0; +} |