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-rw-r--r--src/libknot/yparser/yptrafo.c1104
1 files changed, 1104 insertions, 0 deletions
diff --git a/src/libknot/yparser/yptrafo.c b/src/libknot/yparser/yptrafo.c
new file mode 100644
index 0000000..60b3717
--- /dev/null
+++ b/src/libknot/yparser/yptrafo.c
@@ -0,0 +1,1104 @@
+/* Copyright (C) 2023 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 <arpa/inet.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "libknot/yparser/yptrafo.h"
+#include "libknot/attribute.h"
+#include "libknot/consts.h"
+#include "libknot/dname.h"
+#include "contrib/base64.h"
+#include "contrib/ctype.h"
+#include "contrib/musl/inet_ntop.h"
+#include "contrib/sockaddr.h"
+#include "contrib/wire_ctx.h"
+
+enum {
+ UNIT_BYTE = 'B',
+ UNIT_KILO = 'K',
+ UNIT_MEGA = 'M',
+ UNIT_GIGA = 'G',
+ UNIT_SEC = 's',
+ UNIT_MIN = 'm',
+ UNIT_HOUR = 'h',
+ UNIT_DAY = 'd'
+};
+
+enum {
+ MULTI_BYTE = 1,
+ MULTI_KILO = 1024,
+ MULTI_MEGA = 1024 * 1024,
+ MULTI_GIGA = 1024 * 1024 * 1024,
+ MULTI_SEC = 1,
+ MULTI_MIN = 60,
+ MULTI_HOUR = 3600,
+ MULTI_DAY = 24 * 3600
+};
+
+static wire_ctx_t copy_in(
+ wire_ctx_t *in,
+ size_t in_len,
+ char *buf,
+ size_t buf_len)
+{
+ wire_ctx_t ctx = wire_ctx_init((uint8_t *)buf, buf_len);
+ wire_ctx_write(&ctx, in->position, in_len);
+ wire_ctx_skip(in, in_len);
+ // Write the terminator.
+ wire_ctx_write_u8(&ctx, '\0');
+ wire_ctx_skip(&ctx, -1);
+ return ctx;
+}
+
+_public_
+int yp_str_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ wire_ctx_write(out, in->position, YP_LEN);
+ wire_ctx_skip(in, YP_LEN);
+ // Write string terminator.
+ wire_ctx_write_u8(out, '\0');
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_str_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ size_t len = strlen((char *)in->position) + 1;
+
+ wire_ctx_write(out, in->position, len);
+ wire_ctx_skip(in, len);
+ // Set the terminator as a current position.
+ wire_ctx_skip(out, -1);
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_bool_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ if (strncasecmp((char *)in->position, "on", YP_LEN) == 0 ||
+ strncasecmp((char *)in->position, "true", YP_LEN) == 0) {
+ wire_ctx_write_u8(out, 1);
+ } else if (strncasecmp((char *)in->position, "off", YP_LEN) == 0 ||
+ strncasecmp((char *)in->position, "false", YP_LEN) == 0) {
+ wire_ctx_write_u8(out, 0);
+ } else {
+ return KNOT_EINVAL;
+ }
+
+ wire_ctx_skip(in, YP_LEN);
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_bool_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ const char *value;
+
+ switch (wire_ctx_read_u8(in)) {
+ case 0:
+ value = "off";
+ break;
+ case 1:
+ value = "on";
+ break;
+ default:
+ return KNOT_EINVAL;
+ }
+
+ int ret = snprintf((char *)out->position, wire_ctx_available(out), "%s",
+ value);
+ if (ret <= 0 || ret >= wire_ctx_available(out)) {
+ return KNOT_ESPACE;
+ }
+ wire_ctx_skip(out, ret);
+
+ YP_CHECK_RET;
+}
+
+static int remove_unit(
+ int64_t *number,
+ char unit,
+ yp_style_t style)
+{
+ int64_t multiplier = 1;
+
+ // Get the multiplier for the unit.
+ if (style & YP_SSIZE) {
+ switch (unit) {
+ case UNIT_BYTE:
+ multiplier = MULTI_BYTE;
+ break;
+ case UNIT_KILO:
+ multiplier = MULTI_KILO;
+ break;
+ case UNIT_MEGA:
+ multiplier = MULTI_MEGA;
+ break;
+ case UNIT_GIGA:
+ multiplier = MULTI_GIGA;
+ break;
+ default:
+ return KNOT_EINVAL;
+ }
+ } else if (style & YP_STIME) {
+ switch (unit) {
+ case UNIT_SEC:
+ multiplier = MULTI_SEC;
+ break;
+ case UNIT_MIN:
+ multiplier = MULTI_MIN;
+ break;
+ case UNIT_HOUR:
+ multiplier = MULTI_HOUR;
+ break;
+ case UNIT_DAY:
+ multiplier = MULTI_DAY;
+ break;
+ default:
+ return KNOT_EINVAL;
+ }
+ } else {
+ return KNOT_EINVAL;
+ }
+
+ // Check for possible number overflow.
+ if (INT64_MAX / multiplier < (*number >= 0 ? *number : -*number)) {
+ return KNOT_ERANGE;
+ }
+
+ *number *= multiplier;
+
+ return KNOT_EOK;
+}
+
+_public_
+int yp_int_to_bin(
+ YP_TXT_BIN_PARAMS,
+ int64_t min,
+ int64_t max,
+ yp_style_t style)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ // Copy input string to the buffer to limit strtoll overread.
+ char buf[32];
+ wire_ctx_t buf_ctx = copy_in(in, YP_LEN, buf, sizeof(buf));
+ if (buf_ctx.error != KNOT_EOK) {
+ return buf_ctx.error;
+ }
+
+ // Parse the number.
+ char *end;
+ errno = 0;
+ int64_t number = strtoll(buf, &end, 10);
+
+ // Check for number overflow.
+ if (errno == ERANGE && (number == LLONG_MAX || number == LLONG_MIN)) {
+ return KNOT_ERANGE;
+ }
+ // Check if the whole string is invalid.
+ if ((errno != 0 && number == 0) || end == buf) {
+ return KNOT_EINVAL;
+ }
+ // Check the rest of the string for a unit.
+ if (*end != '\0') {
+ // Check just for one-char rest.
+ if (*(end + 1) != '\0') {
+ return KNOT_EINVAL;
+ }
+
+ // Try to apply a unit on the number.
+ int ret = remove_unit(&number, *end, style);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ }
+
+ // Check for the result number overflow.
+ if (number < min || number > max) {
+ return KNOT_ERANGE;
+ }
+
+ // Write the result.
+ wire_ctx_write_u64(out, number);
+
+ YP_CHECK_RET;
+}
+
+static void add_unit(
+ int64_t *number,
+ char *unit,
+ yp_style_t style)
+{
+ int64_t multiplier = 1;
+ char basic_unit = '\0';
+ char new_unit = '\0';
+
+ // Get the multiplier for the unit.
+ if (style & YP_SSIZE) {
+ basic_unit = UNIT_BYTE;
+
+ if (*number < MULTI_KILO) {
+ multiplier = MULTI_BYTE;
+ new_unit = UNIT_BYTE;
+ } else if (*number < MULTI_MEGA) {
+ multiplier = MULTI_KILO;
+ new_unit = UNIT_KILO;
+ } else if (*number < MULTI_GIGA) {
+ multiplier = MULTI_MEGA;
+ new_unit = UNIT_MEGA;
+ } else {
+ multiplier = MULTI_GIGA;
+ new_unit = UNIT_GIGA;
+ }
+ } else if (style & YP_STIME) {
+ basic_unit = UNIT_SEC;
+
+ if (*number < MULTI_MIN) {
+ multiplier = MULTI_SEC;
+ new_unit = UNIT_SEC;
+ } else if (*number < MULTI_HOUR) {
+ multiplier = MULTI_MIN;
+ new_unit = UNIT_MIN;
+ } else if (*number < MULTI_DAY) {
+ multiplier = MULTI_HOUR;
+ new_unit = UNIT_HOUR;
+ } else {
+ multiplier = MULTI_DAY;
+ new_unit = UNIT_DAY;
+ }
+ }
+
+ // Check for unit application without any remainder.
+ if ((*number % multiplier) == 0) {
+ *number /= multiplier;
+ *unit = new_unit;
+ } else {
+ *unit = basic_unit;
+ }
+}
+
+_public_
+int yp_int_to_txt(
+ YP_BIN_TXT_PARAMS,
+ yp_style_t style)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ char unit[2] = { '\0' };
+ int64_t number = wire_ctx_read_u64(in);
+ add_unit(&number, unit, style);
+
+ int ret = snprintf((char *)out->position, wire_ctx_available(out),
+ "%"PRId64"%s", number, unit);
+ if (ret <= 0 || ret >= wire_ctx_available(out)) {
+ return KNOT_ESPACE;
+ }
+ wire_ctx_skip(out, ret);
+
+ YP_CHECK_RET;
+}
+
+static uint8_t sock_type_guess(
+ const uint8_t *str,
+ size_t len)
+{
+ size_t dots = 0;
+ size_t semicolons = 0;
+ size_t digits = 0;
+
+ // Analyze the string.
+ for (size_t i = 0; i < len; i++) {
+ if (str[i] == '.') dots++;
+ else if (str[i] == ':') semicolons++;
+ else if (is_digit(str[i])) digits++;
+ }
+
+ // Guess socket type.
+ if (semicolons >= 1) {
+ return 6;
+ } else if (semicolons == 0 && dots == 3 && digits >= 3) {
+ return 4;
+ } else {
+ return 0;
+ }
+}
+
+_public_
+int yp_addr_noport_to_bin(
+ YP_TXT_BIN_PARAMS,
+ bool allow_unix)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ struct in_addr addr4;
+ struct in6_addr addr6;
+
+ uint8_t type = sock_type_guess(in->position, YP_LEN);
+
+ // Copy address to the buffer to limit inet_pton overread.
+ char buf[INET6_ADDRSTRLEN];
+ if (type == 4 || type == 6) {
+ wire_ctx_t buf_ctx = copy_in(in, YP_LEN, buf, sizeof(buf));
+ if (buf_ctx.error != KNOT_EOK) {
+ return buf_ctx.error;
+ }
+ }
+
+ // Write address type.
+ wire_ctx_write_u8(out, type);
+
+ // Write address as such.
+ if (type == 4 && inet_pton(AF_INET, buf, &addr4) == 1) {
+ wire_ctx_write(out, (uint8_t *)&(addr4.s_addr),
+ sizeof(addr4.s_addr));
+ } else if (type == 6 && inet_pton(AF_INET6, buf, &addr6) == 1) {
+ wire_ctx_write(out, (uint8_t *)&(addr6.s6_addr),
+ sizeof(addr6.s6_addr));
+ } else if (type == 0 && allow_unix) {
+ int ret = yp_str_to_bin(in, out, stop);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ } else {
+ return KNOT_EINVAL;
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_addr_noport_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ struct in_addr addr4;
+ struct in6_addr addr6;
+
+ int ret;
+
+ switch (wire_ctx_read_u8(in)) {
+ case 0:
+ ret = yp_str_to_txt(in, out);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ break;
+ case 4:
+ wire_ctx_read(in, &(addr4.s_addr), sizeof(addr4.s_addr));
+ if (knot_inet_ntop(AF_INET, &addr4, (char *)out->position,
+ wire_ctx_available(out)) == NULL) {
+ return KNOT_EINVAL;
+ }
+ wire_ctx_skip(out, strlen((char *)out->position));
+ break;
+ case 6:
+ wire_ctx_read(in, &(addr6.s6_addr), sizeof(addr6.s6_addr));
+ if (knot_inet_ntop(AF_INET6, &addr6, (char *)out->position,
+ wire_ctx_available(out)) == NULL) {
+ return KNOT_EINVAL;
+ }
+ wire_ctx_skip(out, strlen((char *)out->position));
+ break;
+ default:
+ return KNOT_EINVAL;
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_addr_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ // Check for address@port separator.
+ const uint8_t *pos = (uint8_t *)strrchr((char *)in->position, '@');
+ // Ignore out-of-bounds result.
+ if (pos >= stop) {
+ pos = NULL;
+ }
+
+ // Store address type position.
+ uint8_t *type = out->position;
+
+ // Write the address without a port.
+ int ret = yp_addr_noport_to_bin(in, out, pos, true);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+
+ if (pos != NULL) {
+ if (*type == 0) {
+ // Rewrite string terminator.
+ wire_ctx_skip(out, -1);
+ // Append the rest (separator and port) as a string.
+ ret = yp_str_to_bin(in, out, stop);
+ } else {
+ // Skip the separator.
+ wire_ctx_skip(in, sizeof(uint8_t));
+
+ // Write the port as a number.
+ ret = yp_int_to_bin(in, out, stop, 0, UINT16_MAX, YP_SNONE);
+ }
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ } else if (*type == 4 || *type == 6) {
+ wire_ctx_write_u64(out, (uint64_t)-1);
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_addr_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ // Store address type position.
+ uint8_t *type = in->position;
+
+ // Write address.
+ int ret = yp_addr_noport_to_txt(in, out);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+
+ // Write port.
+ if (*type == 4 || *type == 6) {
+ int64_t port = wire_ctx_read_u64(in);
+
+ if (port >= 0) {
+ // Write separator.
+ wire_ctx_write_u8(out, '@');
+
+ // Write port.
+ wire_ctx_skip(in, -sizeof(uint64_t));
+ ret = yp_int_to_txt(in, out, YP_SNONE);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ }
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_addr_range_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ // Format: 0 - single address, 1 - address prefix, 2 - address range.
+ uint8_t format = 0;
+
+ const bool unix_path = (in->position[0] == '/');
+ const uint8_t *pos = NULL;
+
+ if (!unix_path) {
+ // Check for the "addr/mask" format.
+ pos = (uint8_t *)strchr((char *)in->position, '/');
+ if (pos >= stop) {
+ pos = NULL;
+ }
+
+ if (pos != NULL) {
+ format = 1;
+ } else {
+ // Check for the "addr1-addr2" format.
+ pos = (uint8_t *)strchr((char *)in->position, '-');
+ if (pos >= stop) {
+ pos = NULL;
+ }
+ if (pos != NULL) {
+ format = 2;
+ }
+ }
+ }
+
+ // Store address1 type position.
+ uint8_t *type1 = out->position;
+
+ // Write the first address.
+ int ret = yp_addr_noport_to_bin(in, out, pos, unix_path);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+
+ wire_ctx_write_u8(out, format);
+
+ switch (format) {
+ case 1:
+ // Skip the separator.
+ wire_ctx_skip(in, sizeof(uint8_t));
+
+ // Write the prefix length.
+ ret = yp_int_to_bin(in, out, stop, 0, (*type1 == 4) ? 32 : 128,
+ YP_SNONE);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ break;
+ case 2:
+ // Skip the separator.
+ wire_ctx_skip(in, sizeof(uint8_t));
+
+ // Store address2 type position.
+ uint8_t *type2 = out->position;
+
+ // Write the second address.
+ ret = yp_addr_noport_to_bin(in, out, stop, false);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+
+ // Check for address mismatch.
+ if (*type1 != *type2) {
+ return KNOT_EINVAL;
+ }
+ break;
+ default:
+ break;
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_addr_range_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ // Write the first address.
+ int ret = yp_addr_noport_to_txt(in, out);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+
+ uint8_t format = wire_ctx_read_u8(in);
+
+ switch (format) {
+ case 1:
+ // Write the separator.
+ wire_ctx_write_u8(out, '/');
+
+ // Write the prefix length.
+ ret = yp_int_to_txt(in, out, YP_SNONE);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ break;
+ case 2:
+ // Write the separator.
+ wire_ctx_write_u8(out, '-');
+
+ // Write the second address.
+ ret = yp_addr_noport_to_txt(in, out);
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+ break;
+ default:
+ break;
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_option_to_bin(
+ YP_TXT_BIN_PARAMS,
+ const knot_lookup_t *opts)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ while (opts->name != NULL) {
+ if (YP_LEN == strlen(opts->name) &&
+ strncasecmp((char *)in->position, opts->name, YP_LEN) == 0) {
+ wire_ctx_write_u8(out, opts->id);
+ wire_ctx_skip(in, YP_LEN);
+ YP_CHECK_RET;
+ }
+ opts++;
+ }
+
+ return KNOT_EINVAL;
+}
+
+_public_
+int yp_option_to_txt(
+ YP_BIN_TXT_PARAMS,
+ const knot_lookup_t *opts)
+{
+ uint8_t id = wire_ctx_read_u8(in);
+
+ while (opts->name != NULL) {
+ if (id == opts->id) {
+ int ret = snprintf((char *)out->position,
+ wire_ctx_available(out), "%s",
+ opts->name);
+ if (ret <= 0 || ret >= wire_ctx_available(out)) {
+ return KNOT_ESPACE;
+ }
+ wire_ctx_skip(out, ret);
+ YP_CHECK_RET;
+ }
+ opts++;
+ }
+
+ return KNOT_EINVAL;
+}
+
+_public_
+int yp_dname_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ // Copy dname string to the buffer to limit dname_from_str overread.
+ knot_dname_txt_storage_t buf;
+ wire_ctx_t buf_ctx = copy_in(in, YP_LEN, buf, sizeof(buf));
+ if (buf_ctx.error != KNOT_EOK) {
+ return buf_ctx.error;
+ }
+
+ // Convert the dname.
+ if (knot_dname_from_str(out->position, buf, wire_ctx_available(out)) == NULL) {
+ return KNOT_EINVAL;
+ }
+
+ // Check the result and count the length.
+ int ret = knot_dname_wire_check(out->position,
+ out->position + wire_ctx_available(out),
+ NULL);
+ if (ret <= 0) {
+ return KNOT_EINVAL;
+ }
+
+ // Convert the result to lower case.
+ knot_dname_to_lower(out->position);
+
+ wire_ctx_skip(out, ret);
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_dname_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ if (knot_dname_to_str((char *)out->position, in->position,
+ wire_ctx_available(out)) == NULL) {
+ return KNOT_EINVAL;
+ }
+
+ wire_ctx_skip(out, strlen((char *)out->position));
+
+ YP_CHECK_RET;
+}
+
+static int hex_to_num(char hex) {
+ if (hex >= '0' && hex <= '9') return hex - '0';
+ if (hex >= 'a' && hex <= 'f') return hex - 'a' + 10;
+ if (hex >= 'A' && hex <= 'F') return hex - 'A' + 10;
+ return -1;
+}
+
+_public_
+int yp_hex_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ // Check for hex notation (leading "0x").
+ if (wire_ctx_available(in) >= 2 &&
+ in->position[0] == '0' && in->position[1] == 'x') {
+ wire_ctx_skip(in, 2);
+
+ if (YP_LEN % 2 != 0) {
+ return KNOT_EINVAL;
+ }
+
+ // Write data length.
+ wire_ctx_write_u16(out, YP_LEN / 2);
+
+ // Decode hex string.
+ while (YP_LEN > 0) {
+ uint8_t buf[2] = { 0 };
+ wire_ctx_read(in, buf, sizeof(buf));
+
+ if (!is_xdigit(buf[0]) ||
+ !is_xdigit(buf[1])) {
+ return KNOT_EINVAL;
+ }
+
+ wire_ctx_write_u8(out, 16 * hex_to_num(buf[0]) +
+ hex_to_num(buf[1]));
+ }
+ } else {
+ // Write data length.
+ wire_ctx_write_u16(out, YP_LEN);
+
+ // Write textual string (without terminator).
+ wire_ctx_write(out, in->position, YP_LEN);
+ wire_ctx_skip(in, YP_LEN);
+ }
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_hex_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ size_t len = wire_ctx_read_u16(in);
+
+ bool printable = true;
+
+ // Check for printable string.
+ for (size_t i = 0; i < len; i++) {
+ if (!is_print(in->position[i])) {
+ printable = false;
+ break;
+ }
+ }
+
+ if (printable) {
+ wire_ctx_write(out, in->position, len);
+ wire_ctx_skip(in, len);
+ } else {
+ const char *prefix = "0x";
+ const char *hex = "0123456789ABCDEF";
+
+ // Write hex prefix.
+ wire_ctx_write(out, (uint8_t *)prefix, strlen(prefix));
+
+ // Encode data to hex.
+ for (size_t i = 0; i < len; i++) {
+ uint8_t bin = wire_ctx_read_u8(in);
+ wire_ctx_write_u8(out, hex[bin / 16]);
+ wire_ctx_write_u8(out, hex[bin % 16]);
+ }
+ }
+
+ // Write the terminator.
+ wire_ctx_write_u8(out, '\0');
+ wire_ctx_skip(out, -1);
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_base64_to_bin(
+ YP_TXT_BIN_PARAMS)
+{
+ YP_CHECK_PARAMS_BIN;
+
+ // Reserve some space for data length.
+ wire_ctx_skip(out, sizeof(uint16_t));
+
+ int ret = knot_base64_decode(in->position, YP_LEN, out->position,
+ wire_ctx_available(out));
+ if (ret < 0) {
+ return ret;
+ }
+ wire_ctx_skip(in, YP_LEN);
+
+ // Write the data length.
+ wire_ctx_skip(out, -sizeof(uint16_t));
+ wire_ctx_write_u16(out, ret);
+ wire_ctx_skip(out, ret);
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_base64_to_txt(
+ YP_BIN_TXT_PARAMS)
+{
+ YP_CHECK_PARAMS_TXT;
+
+ // Read the data length.
+ uint16_t len = wire_ctx_read_u16(in);
+
+ int ret = knot_base64_encode(in->position, len, out->position,
+ wire_ctx_available(out));
+ if (ret < 0) {
+ return ret;
+ }
+ wire_ctx_skip(out, ret);
+
+ // Write the terminator.
+ wire_ctx_write_u8(out, '\0');
+ wire_ctx_skip(out, -1);
+
+ YP_CHECK_RET;
+}
+
+_public_
+int yp_item_to_bin(
+ const yp_item_t *item,
+ const char *txt,
+ size_t txt_len,
+ uint8_t *bin,
+ size_t *bin_len)
+{
+ if (item == NULL || txt == NULL || bin == NULL || bin_len == NULL) {
+ return KNOT_EINVAL;
+ }
+
+ wire_ctx_t in = wire_ctx_init_const((const uint8_t *)txt, txt_len);
+ wire_ctx_t out = wire_ctx_init(bin, *bin_len);
+
+ int ret;
+ size_t ref_len;
+
+ switch (item->type) {
+ case YP_TINT:
+ ret = yp_int_to_bin(&in, &out, NULL, item->var.i.min,
+ item->var.i.max, item->var.i.unit);
+ break;
+ case YP_TBOOL:
+ ret = yp_bool_to_bin(&in, &out, NULL);
+ break;
+ case YP_TOPT:
+ ret = yp_option_to_bin(&in, &out, NULL, item->var.o.opts);
+ break;
+ case YP_TSTR:
+ ret = yp_str_to_bin(&in, &out, NULL);
+ break;
+ case YP_TADDR:
+ ret = yp_addr_to_bin(&in, &out, NULL);
+ break;
+ case YP_TNET:
+ ret = yp_addr_range_to_bin(&in, &out, NULL);
+ break;
+ case YP_TDNAME:
+ ret = yp_dname_to_bin(&in, &out, NULL);
+ break;
+ case YP_THEX:
+ ret = yp_hex_to_bin(&in, &out, NULL);
+ break;
+ case YP_TB64:
+ ret = yp_base64_to_bin(&in, &out, NULL);
+ break;
+ case YP_TDATA:
+ ret = item->var.d.to_bin(&in, &out, NULL);
+ break;
+ case YP_TREF:
+ ref_len = wire_ctx_available(&out);
+ ret = yp_item_to_bin(item->var.r.ref->var.g.id,
+ (char *)in.position, wire_ctx_available(&in),
+ out.position, &ref_len);
+ wire_ctx_skip(&out, ref_len);
+ break;
+ default:
+ ret = KNOT_EOK;
+ }
+
+ if (ret != KNOT_EOK) {
+ return ret;
+ } else if (in.error != KNOT_EOK) {
+ return in.error;
+ } else if (out.error != KNOT_EOK) {
+ return out.error;
+ }
+
+ *bin_len = wire_ctx_offset(&out);
+
+ return KNOT_EOK;
+}
+
+_public_
+int yp_item_to_txt(
+ const yp_item_t *item,
+ const uint8_t *bin,
+ size_t bin_len,
+ char *txt,
+ size_t *txt_len,
+ yp_style_t style)
+{
+ if (item == NULL || bin == NULL || txt == NULL || txt_len == NULL) {
+ return KNOT_EINVAL;
+ }
+
+ wire_ctx_t in = wire_ctx_init_const(bin, bin_len);
+ wire_ctx_t out = wire_ctx_init((uint8_t *)txt, *txt_len);
+
+ // Write leading quote.
+ if (!(style & YP_SNOQUOTE)) {
+ wire_ctx_write_u8(&out, '"');
+ }
+
+ int ret;
+ size_t ref_len;
+
+ switch (item->type) {
+ case YP_TINT:
+ ret = yp_int_to_txt(&in, &out, item->var.i.unit & style);
+ break;
+ case YP_TBOOL:
+ ret = yp_bool_to_txt(&in, &out);
+ break;
+ case YP_TOPT:
+ ret = yp_option_to_txt(&in, &out, item->var.o.opts);
+ break;
+ case YP_TSTR:
+ ret = yp_str_to_txt(&in, &out);
+ break;
+ case YP_TADDR:
+ ret = yp_addr_to_txt(&in, &out);
+ break;
+ case YP_TNET:
+ ret = yp_addr_range_to_txt(&in, &out);
+ break;
+ case YP_TDNAME:
+ ret = yp_dname_to_txt(&in, &out);
+ break;
+ case YP_THEX:
+ ret = yp_hex_to_txt(&in, &out);
+ break;
+ case YP_TB64:
+ ret = yp_base64_to_txt(&in, &out);
+ break;
+ case YP_TDATA:
+ ret = item->var.d.to_txt(&in, &out);
+ break;
+ case YP_TREF:
+ ref_len = wire_ctx_available(&out);
+ ret = yp_item_to_txt(item->var.r.ref->var.g.id,
+ in.position, wire_ctx_available(&in),
+ (char *)out.position,
+ &ref_len, style | YP_SNOQUOTE);
+ wire_ctx_skip(&out, ref_len);
+ break;
+ default:
+ ret = KNOT_EOK;
+ }
+
+ // Write trailing quote.
+ if (!(style & YP_SNOQUOTE)) {
+ wire_ctx_write_u8(&out, '"');
+ }
+
+ // Write string terminator.
+ wire_ctx_write_u8(&out, '\0');
+ wire_ctx_skip(&out, -1);
+
+ if (ret != KNOT_EOK) {
+ return ret;
+ } else if (in.error != KNOT_EOK) {
+ return in.error;
+ } else if (out.error != KNOT_EOK) {
+ return out.error;
+ }
+
+ *txt_len = wire_ctx_offset(&out);
+
+ return KNOT_EOK;
+}
+
+_public_
+struct sockaddr_storage yp_addr_noport(
+ const uint8_t *data)
+{
+ struct sockaddr_storage ss = { AF_UNSPEC };
+
+ // Read address type.
+ uint8_t type = *data;
+ data += sizeof(type);
+
+ // Set address.
+ switch (type) {
+ case 0:
+ sockaddr_set(&ss, AF_UNIX, (char *)data, 0);
+ break;
+ case 4:
+ sockaddr_set_raw(&ss, AF_INET, data,
+ sizeof(((struct in_addr *)NULL)->s_addr));
+ break;
+ case 6:
+ sockaddr_set_raw(&ss, AF_INET6, data,
+ sizeof(((struct in6_addr *)NULL)->s6_addr));
+ break;
+ }
+
+ return ss;
+}
+
+_public_
+struct sockaddr_storage yp_addr(
+ const uint8_t *data,
+ bool *no_port)
+{
+ struct sockaddr_storage ss = yp_addr_noport(data);
+
+ size_t addr_len;
+
+ // Get binary address length.
+ switch (ss.ss_family) {
+ case AF_INET:
+ addr_len = sizeof(((struct in_addr *)NULL)->s_addr);
+ break;
+ case AF_INET6:
+ addr_len = sizeof(((struct in6_addr *)NULL)->s6_addr);
+ break;
+ default:
+ addr_len = 0;
+ *no_port = true;
+ }
+
+ if (addr_len > 0) {
+ int64_t port = knot_wire_read_u64(data + sizeof(uint8_t) + addr_len);
+ if (port >= 0) {
+ sockaddr_port_set(&ss, port);
+ *no_port = false;
+ } else {
+ *no_port = true;
+ }
+ }
+
+ return ss;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 01:18:41 +0000