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- /*
- This file is part of GNUnet
- Copyright (C) 2014, 2015, 2016 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet 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
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file my/my_result_helper.c
- * @brief functions to extract result values
- * @author Christophe Genevey
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #include "gnunet_my_lib.h"
- /**
- * extract data from a Mysql database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] result mysql result
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid
- */
- static int
- pre_extract_varsize_blob (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = NULL;
- results[0].buffer_length = 0;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * extract data from a Mysql database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid
- */
- static int
- post_extract_varsize_blob (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- void *buf;
- size_t size;
- if (*results->is_null)
- return GNUNET_SYSERR;
- size = (size_t) rs->mysql_bind_output_length;
- if (rs->mysql_bind_output_length != size)
- return GNUNET_SYSERR; /* 'unsigned long' does not fit in size_t!? */
- buf = GNUNET_malloc (size);
- results[0].buffer = buf;
- results[0].buffer_length = size;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- if (0 !=
- mysql_stmt_fetch_column (stmt,
- results,
- column,
- 0))
- {
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- *(void **) rs->dst = buf;
- *rs->result_size = size;
- return GNUNET_OK;
- }
- /**
- * extract data from a Mysql database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- */
- static void
- cleanup_varsize_blob (void *cls,
- struct GNUNET_MY_ResultSpec *rs)
- {
- void **ptr = (void **) rs->dst;
- if (NULL != *ptr)
- {
- GNUNET_free (*ptr);
- *ptr = NULL;
- }
- }
- /**
- * Variable-size result expected
- *
- * @param[out] dst where to store the result, allocated
- * @param[out] ptr_size where to store the size of @a dst
- * @return array entru for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_variable_size (void **dst,
- size_t *ptr_size)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_varsize_blob,
- .post_conv = &post_extract_varsize_blob,
- .cleaner = &cleanup_varsize_blob,
- .dst = (void *) (dst),
- .result_size = ptr_size,
- .num_fields = 1
- };
- return res;
- }
- /**
- * Extract data from a Mysql database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid(non-existing field or NULL)
- */
- static int
- pre_extract_fixed_blob (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = rs->dst;
- results[0].buffer_length = rs->dst_size;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Check size of extracted fixed size data from a Mysql database @a
- * result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid(non-existing field or NULL)
- */
- static int
- post_extract_fixed_blob (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- if (*results->is_null)
- return GNUNET_SYSERR;
- if (rs->dst_size != rs->mysql_bind_output_length)
- return GNUNET_SYSERR;
- return GNUNET_OK;
- }
- /**
- * Fixed-size result expected.
- *
- * @param name name of the field in the table
- * @param[out] dst where to store the result
- * @param ptr_size number of bytes in @a dst
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_fixed_size (void *ptr,
- size_t ptr_size)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_fixed_blob,
- .post_conv = &post_extract_fixed_blob,
- .cleaner = NULL,
- .dst = (void *) (ptr),
- .dst_size = ptr_size,
- .num_fields = 1
- };
- return res;
- }
- /**
- * Extract data from a Mysql database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- pre_extract_rsa_public_key (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = NULL;
- results[0].buffer_length = 0;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Check size of extracted fixed size data from a Mysql database @a
- * result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- post_extract_rsa_public_key (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- struct GNUNET_CRYPTO_RsaPublicKey **pk = rs->dst;
- void *buf;
- size_t size;
- if (*results->is_null)
- return GNUNET_SYSERR;
- size = (size_t) rs->mysql_bind_output_length;
- if (rs->mysql_bind_output_length != size)
- return GNUNET_SYSERR; /* 'unsigned long' does not fit in size_t!? */
- buf = GNUNET_malloc (size);
- results[0].buffer = buf;
- results[0].buffer_length = size;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- if (0 !=
- mysql_stmt_fetch_column (stmt,
- results,
- column,
- 0))
- {
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- *pk = GNUNET_CRYPTO_rsa_public_key_decode (buf,
- size);
- GNUNET_free (buf);
- if (NULL == *pk)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "Results contains bogus public key value (fail to decode)\n");
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
- /**
- * Function called to clean up memory allocated
- * by a #GNUNET_MY_ResultConverter.
- *
- * @param cls closure
- * @param rs result data to clean up
- */
- static void
- clean_rsa_public_key (void *cls,
- struct GNUNET_MY_ResultSpec *rs)
- {
- struct GNUNET_CRYPTO_RsaPublicKey **pk = rs->dst;
- if (NULL != *pk)
- {
- GNUNET_CRYPTO_rsa_public_key_free (*pk);
- *pk = NULL;
- }
- }
- /**
- * RSA public key expected
- *
- * @param name name of the field in the table
- * @param[out] rsa where to store the result
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_rsa_public_key (struct GNUNET_CRYPTO_RsaPublicKey **rsa)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_rsa_public_key,
- .post_conv = &post_extract_rsa_public_key,
- .cleaner = &clean_rsa_public_key,
- .dst = (void *) rsa,
- .dst_size = 0,
- .num_fields = 1
- };
- return res;
- }
- /**
- * Extract data from a Mysql database @a result at row @a row.
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- pre_extract_rsa_signature (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = 0;
- results[0].buffer_length = 0;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Extract data from a Mysql database @a result at row @a row.
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- post_extract_rsa_signature (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- struct GNUNET_CRYPTO_RsaSignature **sig = rs->dst;
- void *buf;
- size_t size;
- if (*results->is_null)
- return GNUNET_SYSERR;
- size = (size_t) rs->mysql_bind_output_length;
- if (rs->mysql_bind_output_length != size)
- return GNUNET_SYSERR; /* 'unsigned long' does not fit in size_t!? */
- buf = GNUNET_malloc (size);
- results[0].buffer = buf;
- results[0].buffer_length = size;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- if (0 !=
- mysql_stmt_fetch_column (stmt,
- results,
- column,
- 0))
- {
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- *sig = GNUNET_CRYPTO_rsa_signature_decode (buf,
- size);
- GNUNET_free (buf);
- if (NULL == *sig)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "Resuls contains bogus signature value (fails to decode)\n");
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
- /**
- * Function called to clean up memory allocated
- * by a #GNUNET_MY_ResultConverter.
- *
- * @param cls closure
- * @param rd result data to clean up
- */
- static void
- clean_rsa_signature (void *cls,
- struct GNUNET_MY_ResultSpec *rs)
- {
- struct GNUNET_CRYPTO_RsaSignature **sig = rs->dst;
- if (NULL != *sig)
- {
- GNUNET_CRYPTO_rsa_signature_free (*sig);
- *sig = NULL;
- }
- }
- /**
- * RSA signature expected.
- *
- * @param[out] sig where to store the result;
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_rsa_signature (struct GNUNET_CRYPTO_RsaSignature **sig)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_rsa_signature,
- .post_conv = &post_extract_rsa_signature,
- .cleaner = &clean_rsa_signature,
- .dst = (void *) sig,
- .dst_size = 0,
- .num_fields = 1
- };
- return res;
- }
- /**
- * Extract data from a Mysql database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non existing field or NULL)
- */
- static int
- pre_extract_string (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = NULL;
- results[0].buffer_length = 0;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Check size of extracted fixed size data from a Mysql database @a
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non existing field or NULL)
- */
- static int
- post_extract_string (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- size_t size = (size_t) rs->mysql_bind_output_length;
- char *buf;
- if (rs->mysql_bind_output_length != size)
- return GNUNET_SYSERR;
- if (*results->is_null)
- {
- *(void **) rs->dst = NULL;
- return GNUNET_OK;
- }
- buf = GNUNET_malloc (size);
- results[0].buffer = buf;
- results[0].buffer_length = size;
- results[0].buffer_type = MYSQL_TYPE_BLOB;
- if (0 !=
- mysql_stmt_fetch_column (stmt,
- results,
- column,
- 0))
- {
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- buf[size] = '\0';
- *(void **) rs->dst = buf;
- return GNUNET_OK;
- }
- /**
- * 0- terminated string exprected.
- *
- * @param[out] dst where to store the result, allocated
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_string (char **dst)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_string,
- .post_conv = &post_extract_string,
- .cleaner = NULL,
- .dst = (void *) dst,
- .dst_size = 0,
- .num_fields = 1
- };
- return res;
- }
- /**
- * Absolute time expected
- *
- * @param name name of the field in the table
- * @param[out] at where to store the result
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_absolute_time (struct GNUNET_TIME_Absolute *at)
- {
- return GNUNET_MY_result_spec_uint64 (&at->abs_value_us);
- }
- /**
- * Absolute time in network byte order expected
- *
- * @param[out] at where to store the result
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_absolute_time_nbo (struct GNUNET_TIME_AbsoluteNBO *at)
- {
- struct GNUNET_MY_ResultSpec res =
- GNUNET_MY_result_spec_auto_from_type (&at->abs_value_us__);
- return res;
- }
- /**
- * Extract data from a Postgres database @a result at row @a row.
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_YES if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- pre_extract_uint16 (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = rs->dst;
- results[0].buffer_length = rs->dst_size;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_SHORT;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Check size of extracted fixed size data from a Mysql database.
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_YES if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- post_extract_uint16 (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- if (rs->dst_size != rs->mysql_bind_output_length)
- return GNUNET_SYSERR;
- if (*results->is_null)
- return GNUNET_SYSERR;
- return GNUNET_OK;
- }
- /**
- * uint16_t expected
- *
- * @param[out] u16 where to store the result
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_uint16 (uint16_t *u16)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_uint16,
- .post_conv = &post_extract_uint16,
- .cleaner = NULL,
- .dst = (void *) u16,
- .dst_size = sizeof(*u16),
- .num_fields = 1
- };
- return res;
- }
- /**
- * Extract data from a MYSQL database @a result at row @a row
- *
- * @param cls closure
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- pre_extract_uint32 (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- results[0].buffer = rs->dst;
- results[0].buffer_length = rs->dst_size;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_LONG;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Extract data from a MYSQL database @a result at row @a row
- *
- * @param cls closure
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- post_extract_uint32 (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- if (rs->dst_size != rs->mysql_bind_output_length)
- return GNUNET_SYSERR;
- if (*results->is_null)
- return GNUNET_SYSERR;
- return GNUNET_OK;
- }
- /**
- * uint32_t expected
- *
- * @param[out] u32 where to store the result
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_uint32 (uint32_t *u32)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_uint32,
- .post_conv = &post_extract_uint32,
- .cleaner = NULL,
- .dst = (void *) u32,
- .dst_size = sizeof(*u32),
- .num_fields = 1
- };
- return res;
- }
- /**
- * Extract data from a MYSQL database @a result at row @a row
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- pre_extract_uint64 (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- if (sizeof(uint64_t) != rs->dst_size)
- return GNUNET_SYSERR;
- results[0].buffer = rs->dst;
- results[0].buffer_length = rs->dst_size;
- results[0].length = &rs->mysql_bind_output_length;
- results[0].buffer_type = MYSQL_TYPE_LONGLONG;
- results[0].is_null = &rs->is_null;
- rs->is_null = 0;
- return GNUNET_OK;
- }
- /**
- * Check size of extracted fixed-size data from a Mysql database
- *
- * @param cls closure
- * @param[in,out] rs
- * @param stmt the mysql statement that is being run
- * @param column the column that is being processed
- * @param[out] results
- * @return
- * #GNUNET_OK if all results could be extracted
- * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
- */
- static int
- post_extract_uint64 (void *cls,
- struct GNUNET_MY_ResultSpec *rs,
- MYSQL_STMT *stmt,
- unsigned int column,
- MYSQL_BIND *results)
- {
- if (sizeof(uint64_t) != rs->dst_size)
- return GNUNET_SYSERR;
- if (*results->is_null)
- return GNUNET_SYSERR;
- return GNUNET_OK;
- }
- /**
- * uint64_t expected.
- *
- * @param[out] u64 where to store the result
- * @return array entry for the result specification to use
- */
- struct GNUNET_MY_ResultSpec
- GNUNET_MY_result_spec_uint64 (uint64_t *u64)
- {
- struct GNUNET_MY_ResultSpec res = {
- .pre_conv = &pre_extract_uint64,
- .post_conv = &post_extract_uint64,
- .cleaner = NULL,
- .dst = (void *) u64,
- .dst_size = sizeof(*u64),
- .num_fields = 1
- };
- return res;
- }
- /* end of my_result_helper.c */
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