--- /dev/null
+/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ *
+ * Libmemcached library
+ *
+ * Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ * Copyright (C) 2006-2009 Brian Aker All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * * The names of its contributors may not be used to endorse or
+ * promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <libmemcached/common.h>
+#include <libmemcached/string.hpp>
+
+static memcached_return_t textual_value_fetch(memcached_instance_st* instance,
+ char *buffer,
+ memcached_result_st *result)
+{
+ char *next_ptr;
+ ssize_t read_length= 0;
+ size_t value_length;
+
+ WATCHPOINT_ASSERT(instance->root);
+ char *end_ptr= buffer + MEMCACHED_DEFAULT_COMMAND_SIZE;
+
+ memcached_result_reset(result);
+
+ char *string_ptr= buffer;
+ string_ptr+= 6; /* "VALUE " */
+
+
+ // Just used for cases of AES decrypt currently
+ memcached_return_t rc= MEMCACHED_SUCCESS;
+
+ /* We load the key */
+ {
+ char *key= result->item_key;
+ result->key_length= 0;
+
+ for (ptrdiff_t prefix_length= memcached_array_size(instance->root->_namespace); !(iscntrl(*string_ptr) || isspace(*string_ptr)) ; string_ptr++)
+ {
+ if (prefix_length == 0)
+ {
+ *key= *string_ptr;
+ key++;
+ result->key_length++;
+ }
+ else
+ prefix_length--;
+ }
+ result->item_key[result->key_length]= 0;
+ }
+
+ if (end_ptr == string_ptr)
+ {
+ goto read_error;
+ }
+
+ /* Flags fetch move past space */
+ string_ptr++;
+ if (end_ptr == string_ptr)
+ {
+ goto read_error;
+ }
+
+ for (next_ptr= string_ptr; isdigit(*string_ptr); string_ptr++) {};
+ errno= 0;
+ result->item_flags= (uint32_t) strtoul(next_ptr, &string_ptr, 10);
+
+ if (errno != 0 or end_ptr == string_ptr)
+ {
+ goto read_error;
+ }
+
+ /* Length fetch move past space*/
+ string_ptr++;
+ if (end_ptr == string_ptr)
+ {
+ goto read_error;
+ }
+
+ for (next_ptr= string_ptr; isdigit(*string_ptr); string_ptr++) {};
+ errno= 0;
+ value_length= (size_t)strtoull(next_ptr, &string_ptr, 10);
+
+ if (errno != 0 or end_ptr == string_ptr)
+ {
+ goto read_error;
+ }
+
+ /* Skip spaces */
+ if (*string_ptr == '\r')
+ {
+ /* Skip past the \r\n */
+ string_ptr+= 2;
+ }
+ else
+ {
+ string_ptr++;
+ for (next_ptr= string_ptr; isdigit(*string_ptr); string_ptr++) {};
+ errno= 0;
+ result->item_cas= strtoull(next_ptr, &string_ptr, 10);
+ }
+
+ if (errno != 0 or end_ptr < string_ptr)
+ {
+ goto read_error;
+ }
+
+ /* We add two bytes so that we can walk the \r\n */
+ if (memcached_failed(memcached_string_check(&result->value, value_length +2)))
+ {
+ return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
+ }
+
+ {
+ char *value_ptr= memcached_string_value_mutable(&result->value);
+ /*
+ We read the \r\n into the string since not doing so is more
+ cycles then the waster of memory to do so.
+
+ We are null terminating through, which will most likely make
+ some people lazy about using the return length.
+ */
+ size_t to_read= (value_length) + 2;
+ memcached_return_t rrc= memcached_io_read(instance, value_ptr, to_read, read_length);
+ if (memcached_failed(rrc) and rrc == MEMCACHED_IN_PROGRESS)
+ {
+ memcached_quit_server(instance, true);
+ return memcached_set_error(*instance, MEMCACHED_IN_PROGRESS, MEMCACHED_AT);
+ }
+ else if (memcached_failed(rrc))
+ {
+ return rrc;
+ }
+ }
+
+ if (read_length != (ssize_t)(value_length + 2))
+ {
+ goto read_error;
+ }
+
+ /* This next bit blows the API, but this is internal....*/
+ {
+ char *char_ptr;
+ char_ptr= memcached_string_value_mutable(&result->value);;
+ char_ptr[value_length]= 0;
+ char_ptr[value_length +1]= 0;
+ memcached_string_set_length(&result->value, value_length);
+ }
+
+ if (memcached_is_encrypted(instance->root) and memcached_result_length(result))
+ {
+ hashkit_string_st *destination;
+
+ if ((destination= hashkit_decrypt(&instance->root->hashkit,
+ memcached_result_value(result), memcached_result_length(result))) == NULL)
+ {
+ rc= memcached_set_error(*instance->root, MEMCACHED_FAILURE,
+ MEMCACHED_AT, memcached_literal_param("hashkit_decrypt() failed"));
+ }
+ else
+ {
+ memcached_result_reset_value(result);
+ if (memcached_failed(memcached_result_set_value(result, hashkit_string_c_str(destination), hashkit_string_length(destination))))
+ {
+ rc= memcached_set_error(*instance->root, MEMCACHED_FAILURE,
+ MEMCACHED_AT, memcached_literal_param("hashkit_decrypt() failed"));
+ }
+ }
+
+ if (memcached_failed(rc))
+ {
+ memcached_result_reset(result);
+ }
+ hashkit_string_free(destination);
+ }
+
+ return rc;
+
+read_error:
+ memcached_io_reset(instance);
+
+ return MEMCACHED_PARTIAL_READ;
+}
+
+static memcached_return_t textual_read_one_response(memcached_instance_st* instance,
+ char *buffer, const size_t buffer_length,
+ memcached_result_st *result)
+{
+ size_t total_read;
+ memcached_return_t rc= memcached_io_readline(instance, buffer, buffer_length, total_read);
+
+ if (memcached_failed(rc))
+ {
+ return rc;
+ }
+ assert(total_read);
+
+ switch(buffer[0])
+ {
+ case 'V':
+ {
+ // VALUE
+ if (buffer[1] == 'A' and buffer[2] == 'L' and buffer[3] == 'U' and buffer[4] == 'E') /* VALUE */
+ {
+ /* We add back in one because we will need to search for END */
+ memcached_server_response_increment(instance);
+ return textual_value_fetch(instance, buffer, result);
+ }
+ // VERSION
+ else if (buffer[1] == 'E' and buffer[2] == 'R' and buffer[3] == 'S' and buffer[4] == 'I' and buffer[5] == 'O' and buffer[6] == 'N') /* VERSION */
+ {
+ /* Find the space, and then move one past it to copy version */
+ char *response_ptr= index(buffer, ' ');
+
+ char *endptr;
+ errno= 0;
+ long int version= strtol(response_ptr, &endptr, 10);
+ if (errno != 0 or version == LONG_MIN or version == LONG_MAX or version > UINT8_MAX or version == 0)
+ {
+ instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse major version"));
+ }
+ instance->major_version= uint8_t(version);
+
+ endptr++;
+ errno= 0;
+ version= strtol(endptr, &endptr, 10);
+ if (errno != 0 or version == LONG_MIN or version == LONG_MAX or version > UINT8_MAX)
+ {
+ instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse minor version"));
+ }
+ instance->minor_version= uint8_t(version);
+
+ endptr++;
+ errno= 0;
+ version= strtol(endptr, &endptr, 10);
+ if (errno != 0 or version == LONG_MIN or version == LONG_MAX or version > UINT8_MAX)
+ {
+ instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse micro version"));
+ }
+ instance->micro_version= uint8_t(version);
+
+ return MEMCACHED_SUCCESS;
+ }
+ }
+ break;
+
+ case 'O':
+ {
+ // OK
+ if (buffer[1] == 'K')
+ {
+ return MEMCACHED_SUCCESS;
+ }
+ }
+ break;
+
+ case 'S':
+ {
+ // STAT
+ if (buffer[1] == 'T' and buffer[2] == 'A' and buffer[3] == 'T') /* STORED STATS */
+ {
+ memcached_server_response_increment(instance);
+ return MEMCACHED_STAT;
+ }
+ // SERVER_ERROR
+ else if (buffer[1] == 'E' and buffer[2] == 'R' and buffer[3] == 'V' and buffer[4] == 'E' and buffer[5] == 'R'
+ and buffer[6] == '_'
+ and buffer[7] == 'E' and buffer[8] == 'R' and buffer[9] == 'R' and buffer[10] == 'O' and buffer[11] == 'R' )
+ {
+ if (total_read == memcached_literal_param_size("SERVER_ERROR"))
+ {
+ return MEMCACHED_SERVER_ERROR;
+ }
+
+ if (total_read >= memcached_literal_param_size("SERVER_ERROR object too large for cache") and
+ (memcmp(buffer, memcached_literal_param("SERVER_ERROR object too large for cache")) == 0))
+ {
+ return MEMCACHED_E2BIG;
+ }
+
+ if (total_read >= memcached_literal_param_size("SERVER_ERROR out of memory") and
+ ((memcmp(buffer, memcached_literal_param("SERVER_ERROR out of memory")) == 0) or
+ (memcmp(buffer, memcached_literal_param("SERVER_ERROR Out of memory")) == 0)))
+ {
+ return MEMCACHED_SERVER_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ // Move past the basic error message and whitespace
+ char *startptr= buffer + memcached_literal_param_size("SERVER_ERROR");
+ if (startptr[0] == ' ')
+ {
+ startptr++;
+ }
+
+ char *endptr= startptr;
+ while (*endptr != '\r' && *endptr != '\n') endptr++;
+
+ return memcached_set_error(*instance, MEMCACHED_SERVER_ERROR, MEMCACHED_AT, startptr, size_t(endptr - startptr));
+ }
+ // STORED
+ else if (buffer[1] == 'T' and buffer[2] == 'O' and buffer[3] == 'R') // and buffer[4] == 'E' and buffer[5] == 'D')
+ {
+ return MEMCACHED_STORED;
+ }
+ }
+ break;
+
+ case 'D':
+ {
+ // DELETED
+ if (buffer[1] == 'E' and buffer[2] == 'L' and buffer[3] == 'E' and buffer[4] == 'T' and buffer[5] == 'E' and buffer[6] == 'D')
+ {
+ return MEMCACHED_DELETED;
+ }
+ }
+ break;
+
+ case 'N':
+ {
+ // NOT_FOUND
+ if (buffer[1] == 'O' and buffer[2] == 'T'
+ and buffer[3] == '_'
+ and buffer[4] == 'F' and buffer[5] == 'O' and buffer[6] == 'U' and buffer[7] == 'N' and buffer[8] == 'D')
+ {
+ return MEMCACHED_NOTFOUND;
+ }
+ // NOT_STORED
+ else if (buffer[1] == 'O' and buffer[2] == 'T'
+ and buffer[3] == '_'
+ and buffer[4] == 'S' and buffer[5] == 'T' and buffer[6] == 'O' and buffer[7] == 'R' and buffer[8] == 'E' and buffer[9] == 'D')
+ {
+ return MEMCACHED_NOTSTORED;
+ }
+ }
+ break;
+
+ case 'E': /* PROTOCOL ERROR or END */
+ {
+ // END
+ if (buffer[1] == 'N' and buffer[2] == 'D')
+ {
+ return MEMCACHED_END;
+ }
+#if 0
+ // PROTOCOL_ERROR
+ else if (buffer[1] == 'R' and buffer[2] == 'O' and buffer[3] == 'T' and buffer[4] == 'O' and buffer[5] == 'C' and buffer[6] == 'O' and buffer[7] == 'L'
+ and buffer[8] == '_'
+ and buffer[9] == 'E' and buffer[10] == 'R' and buffer[11] == 'R' and buffer[12] == 'O' and buffer[13] == 'R')
+ {
+ return MEMCACHED_PROTOCOL_ERROR;
+ }
+#endif
+ // ERROR
+ else if (buffer[1] == 'R' and buffer[2] == 'R' and buffer[3] == 'O' and buffer[4] == 'R')
+ {
+ return MEMCACHED_ERROR;
+ }
+ // EXISTS
+ else if (buffer[1] == 'X' and buffer[2] == 'I' and buffer[3] == 'S' and buffer[4] == 'T' and buffer[5] == 'S')
+ {
+ return MEMCACHED_DATA_EXISTS;
+ }
+ }
+ break;
+
+ case 'T': /* TOUCHED */
+ {
+ // TOUCHED
+ if (buffer[1] == 'O' and buffer[2] == 'U' and buffer[3] == 'C' and buffer[4] == 'H' and buffer[5] == 'E' and buffer[6] == 'D')
+ {
+ return MEMCACHED_SUCCESS;
+ }
+ }
+ break;
+
+ case 'I': /* ITEM */
+ {
+ // ITEM
+ if (buffer[1] == 'T' and buffer[2] == 'E' and buffer[3] == 'M')
+ {
+ /* We add back in one because we will need to search for END */
+ memcached_server_response_increment(instance);
+ return MEMCACHED_ITEM;
+ }
+ }
+ break;
+
+ case 'C': /* CLIENT ERROR */
+ {
+ // CLIENT_ERROR
+ if (buffer[1] == 'L' and buffer[2] == 'I' and buffer[3] == 'E' and buffer[4] == 'N' and buffer[5] == 'T'
+ and buffer[6] == '_'
+ and buffer[7] == 'E' and buffer[8] == 'R' and buffer[9] == 'R' and buffer[10] == 'O' and buffer[11] == 'R')
+ {
+ // Move past the basic error message and whitespace
+ char *startptr= buffer + memcached_literal_param_size("CLIENT_ERROR");
+ if (startptr[0] == ' ')
+ {
+ startptr++;
+ }
+
+ char *endptr= startptr;
+ while (*endptr != '\r' && *endptr != '\n') endptr++;
+
+ return memcached_set_error(*instance, MEMCACHED_CLIENT_ERROR, MEMCACHED_AT, startptr, size_t(endptr - startptr));
+ }
+ }
+ break;
+
+ case '0': /* INCR/DECR response */
+ case '1': /* INCR/DECR response */
+ case '2': /* INCR/DECR response */
+ case '3': /* INCR/DECR response */
+ case '4': /* INCR/DECR response */
+ case '5': /* INCR/DECR response */
+ case '6': /* INCR/DECR response */
+ case '7': /* INCR/DECR response */
+ case '8': /* INCR/DECR response */
+ case '9': /* INCR/DECR response */
+ {
+ errno= 0;
+ unsigned long long int auto_return_value= strtoull(buffer, (char **)NULL, 10);
+
+ if (auto_return_value == ULLONG_MAX and errno == ERANGE)
+ {
+ result->numeric_value= UINT64_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("Numeric response was out of range"));
+ }
+ else if (errno == EINVAL)
+ {
+ result->numeric_value= UINT64_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("Numeric response was out of range"));
+ }
+ else if (errno != 0)
+ {
+ result->numeric_value= UINT64_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("Numeric response was out of range"));
+ }
+
+ result->numeric_value= uint64_t(auto_return_value);
+
+ WATCHPOINT_STRING(buffer);
+ return MEMCACHED_SUCCESS;
+ }
+
+ default:
+ break;
+ }
+
+ buffer[total_read]= 0;
+#if 0
+ if (total_read >= sizeof("STORSTORED") -1)
+ {
+ fprintf(stderr, "%s:%d '%s', %.*s\n", __FILE__, __LINE__,
+ buffer, MEMCACHED_MAX_BUFFER, instance->read_buffer);
+ assert(memcmp(buffer,"STORSTORED", sizeof("STORSTORED") -1));
+ }
+#endif
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT,
+ buffer, total_read);
+}
+
+static memcached_return_t binary_read_one_response(memcached_instance_st* instance,
+ char *buffer, const size_t buffer_length,
+ memcached_result_st *result)
+{
+ memcached_return_t rc;
+ protocol_binary_response_header header;
+
+ assert(memcached_is_binary(instance->root));
+
+ if ((rc= memcached_safe_read(instance, &header.bytes, sizeof(header.bytes))) != MEMCACHED_SUCCESS)
+ {
+ WATCHPOINT_ERROR(rc);
+ return rc;
+ }
+
+ if (header.response.magic != PROTOCOL_BINARY_RES)
+ {
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT);
+ }
+
+ /*
+ ** Convert the header to host local endian!
+ */
+ header.response.keylen= ntohs(header.response.keylen);
+ header.response.status= ntohs(header.response.status);
+ header.response.bodylen= ntohl(header.response.bodylen);
+ header.response.cas= memcached_ntohll(header.response.cas);
+ uint32_t bodylen= header.response.bodylen;
+
+ if (header.response.status == PROTOCOL_BINARY_RESPONSE_SUCCESS or
+ header.response.status == PROTOCOL_BINARY_RESPONSE_AUTH_CONTINUE)
+ {
+ switch (header.response.opcode)
+ {
+ case PROTOCOL_BINARY_CMD_GETKQ:
+ /*
+ * We didn't increment the response counter for the GETKQ packet
+ * (only the final NOOP), so we need to increment the counter again.
+ */
+ memcached_server_response_increment(instance);
+ /* fall through */
+ case PROTOCOL_BINARY_CMD_GETK:
+ {
+ uint16_t keylen= header.response.keylen;
+ memcached_result_reset(result);
+ result->item_cas= header.response.cas;
+
+ if ((rc= memcached_safe_read(instance, &result->item_flags, sizeof (result->item_flags))) != MEMCACHED_SUCCESS)
+ {
+ WATCHPOINT_ERROR(rc);
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+
+ result->item_flags= ntohl(result->item_flags);
+ bodylen -= header.response.extlen;
+
+ result->key_length= keylen;
+ if (memcached_failed(rc= memcached_safe_read(instance, result->item_key, keylen)))
+ {
+ WATCHPOINT_ERROR(rc);
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+
+ // Only bother with doing this if key_length > 0
+ if (result->key_length)
+ {
+ if (memcached_array_size(instance->root->_namespace) and memcached_array_size(instance->root->_namespace) >= result->key_length)
+ {
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT);
+ }
+
+ if (memcached_array_size(instance->root->_namespace))
+ {
+ result->key_length-= memcached_array_size(instance->root->_namespace);
+ memmove(result->item_key, result->item_key +memcached_array_size(instance->root->_namespace), result->key_length);
+ }
+ }
+
+ bodylen -= keylen;
+ if (memcached_failed(memcached_string_check(&result->value, bodylen)))
+ {
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ char *vptr= memcached_string_value_mutable(&result->value);
+ if (memcached_failed(rc= memcached_safe_read(instance, vptr, bodylen)))
+ {
+ WATCHPOINT_ERROR(rc);
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+
+ memcached_string_set_length(&result->value, bodylen);
+ }
+ break;
+
+ case PROTOCOL_BINARY_CMD_INCREMENT:
+ case PROTOCOL_BINARY_CMD_DECREMENT:
+ {
+ if (bodylen != sizeof(uint64_t))
+ {
+ result->numeric_value= UINT64_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT);
+ }
+
+ uint64_t val;
+ if ((rc= memcached_safe_read(instance, &val, sizeof(val))) != MEMCACHED_SUCCESS)
+ {
+ result->numeric_value= UINT64_MAX;
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+
+ result->numeric_value= memcached_ntohll(val);
+ }
+ break;
+
+ case PROTOCOL_BINARY_CMD_SASL_LIST_MECHS:
+ {
+ if (header.response.keylen != 0 || bodylen + 1 > buffer_length)
+ {
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+ else
+ {
+ if ((rc= memcached_safe_read(instance, buffer, bodylen)) != MEMCACHED_SUCCESS)
+ {
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+ }
+ }
+ break;
+
+ case PROTOCOL_BINARY_CMD_VERSION:
+ {
+ char version_buffer[32]; // @todo document this number
+ memset(version_buffer, 0, sizeof(version_buffer));
+
+ if (memcached_safe_read(instance, version_buffer, bodylen) != MEMCACHED_SUCCESS)
+ {
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+
+ char *endptr;
+ errno= 0;
+ long int version= strtol(version_buffer, &endptr, 10);
+ if (errno != 0 or version == LONG_MIN or version == LONG_MAX or version > UINT8_MAX or version == 0)
+ {
+ instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse major version"));
+ }
+ instance->major_version= uint8_t(version);
+
+ endptr++;
+ errno= 0;
+ version= strtol(endptr, &endptr, 10);
+ if (errno != 0 or version == LONG_MIN or version == LONG_MAX or version > UINT8_MAX)
+ {
+ instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse minor version"));
+ }
+ instance->minor_version= uint8_t(version);
+
+ endptr++;
+ errno= 0;
+ version= strtol(endptr, &endptr, 10);
+ if (errno != 0 or version == LONG_MIN or version == LONG_MAX or version > UINT8_MAX)
+ {
+ instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse micro version"));
+ }
+ instance->micro_version= uint8_t(version);
+ }
+ break;
+
+ case PROTOCOL_BINARY_CMD_TOUCH:
+ {
+ rc= MEMCACHED_SUCCESS;
+ if (bodylen == 4) // The four byte read is a bug?
+ {
+ char touch_buffer[4]; // @todo document this number
+ rc= memcached_safe_read(instance, touch_buffer, sizeof(touch_buffer));
+#if 0
+ fprintf(stderr, "%s:%d %d %d %d %d %.*s(%d)\n", __FILE__, __LINE__,
+ int(touch_buffer[0]),
+ int(touch_buffer[1]),
+ int(touch_buffer[2]),
+ int(touch_buffer[3]),
+ int(bodylen), touch_buffer, int(bodylen));
+#endif
+ }
+ return memcached_set_error(*instance, rc, MEMCACHED_AT);
+ }
+
+ case PROTOCOL_BINARY_CMD_FLUSH:
+ case PROTOCOL_BINARY_CMD_QUIT:
+ case PROTOCOL_BINARY_CMD_SET:
+ case PROTOCOL_BINARY_CMD_ADD:
+ case PROTOCOL_BINARY_CMD_REPLACE:
+ case PROTOCOL_BINARY_CMD_APPEND:
+ case PROTOCOL_BINARY_CMD_PREPEND:
+ case PROTOCOL_BINARY_CMD_DELETE:
+ {
+ WATCHPOINT_ASSERT(bodylen == 0);
+ return MEMCACHED_SUCCESS;
+ }
+
+ case PROTOCOL_BINARY_CMD_NOOP:
+ {
+ WATCHPOINT_ASSERT(bodylen == 0);
+ return MEMCACHED_END;
+ }
+
+ case PROTOCOL_BINARY_CMD_STAT:
+ {
+ if (bodylen == 0)
+ {
+ return MEMCACHED_END;
+ }
+ else if (bodylen + 1 > buffer_length)
+ {
+ /* not enough space in buffer.. should not happen... */
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+ else
+ {
+ size_t keylen= header.response.keylen;
+ memset(buffer, 0, buffer_length);
+ if ((rc= memcached_safe_read(instance, buffer, keylen)) != MEMCACHED_SUCCESS ||
+ (rc= memcached_safe_read(instance, buffer + keylen + 1, bodylen - keylen)) != MEMCACHED_SUCCESS)
+ {
+ WATCHPOINT_ERROR(rc);
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+ }
+ }
+ break;
+
+ case PROTOCOL_BINARY_CMD_SASL_AUTH:
+ case PROTOCOL_BINARY_CMD_SASL_STEP:
+ {
+ memcached_result_reset(result);
+ result->item_cas= header.response.cas;
+
+ if (memcached_string_check(&result->value,
+ bodylen) != MEMCACHED_SUCCESS)
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+
+ char *vptr= memcached_string_value_mutable(&result->value);
+ if ((rc= memcached_safe_read(instance, vptr, bodylen)) != MEMCACHED_SUCCESS)
+ {
+ WATCHPOINT_ERROR(rc);
+ return MEMCACHED_UNKNOWN_READ_FAILURE;
+ }
+
+ memcached_string_set_length(&result->value, bodylen);
+ }
+ break;
+ default:
+ {
+ /* Command not implemented yet! */
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT);
+ }
+ }
+ }
+ else if (header.response.bodylen)
+ {
+ /* What should I do with the error message??? just discard it for now */
+ char hole[SMALL_STRING_LEN];
+ while (bodylen > 0)
+ {
+ size_t nr= (bodylen > SMALL_STRING_LEN) ? SMALL_STRING_LEN : bodylen;
+ if ((rc= memcached_safe_read(instance, hole, nr)) != MEMCACHED_SUCCESS)
+ {
+ WATCHPOINT_ERROR(rc);
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT);
+ }
+ bodylen-= (uint32_t) nr;
+ }
+
+ /* This might be an error from one of the quiet commands.. if
+ * so, just throw it away and get the next one. What about creating
+ * a callback to the user with the error information?
+ */
+ switch (header.response.opcode)
+ {
+ case PROTOCOL_BINARY_CMD_SETQ:
+ case PROTOCOL_BINARY_CMD_ADDQ:
+ case PROTOCOL_BINARY_CMD_REPLACEQ:
+ case PROTOCOL_BINARY_CMD_APPENDQ:
+ case PROTOCOL_BINARY_CMD_PREPENDQ:
+ return MEMCACHED_FETCH_NOTFINISHED;
+
+ default:
+ break;
+ }
+ }
+
+ rc= MEMCACHED_SUCCESS;
+ if (header.response.status != 0)
+ {
+ switch (header.response.status)
+ {
+ case PROTOCOL_BINARY_RESPONSE_KEY_ENOENT:
+ rc= MEMCACHED_NOTFOUND;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_KEY_EEXISTS:
+ rc= MEMCACHED_DATA_EXISTS;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_NOT_STORED:
+ rc= MEMCACHED_NOTSTORED;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_E2BIG:
+ rc= MEMCACHED_E2BIG;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_ENOMEM:
+ rc= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_AUTH_CONTINUE:
+ rc= MEMCACHED_AUTH_CONTINUE;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_AUTH_ERROR:
+ rc= MEMCACHED_AUTH_FAILURE;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_EINVAL:
+ case PROTOCOL_BINARY_RESPONSE_UNKNOWN_COMMAND:
+ default:
+ return memcached_set_error(*instance, MEMCACHED_UNKNOWN_READ_FAILURE, MEMCACHED_AT);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static memcached_return_t _read_one_response(memcached_instance_st* instance,
+ char *buffer, const size_t buffer_length,
+ memcached_result_st *result)
+{
+ memcached_server_response_decrement(instance);
+
+ if (result == NULL)
+ {
+ Memcached *root= (Memcached *)instance->root;
+ result = &root->result;
+ }
+
+ memcached_return_t rc;
+ if (memcached_is_binary(instance->root))
+ {
+ do {
+ rc= binary_read_one_response(instance, buffer, buffer_length, result);
+ } while (rc == MEMCACHED_FETCH_NOTFINISHED);
+ }
+ else
+ {
+ rc= textual_read_one_response(instance, buffer, buffer_length, result);
+ }
+
+ if (memcached_fatal(rc))
+ {
+ memcached_io_reset(instance);
+ }
+
+ return rc;
+}
+
+memcached_return_t memcached_read_one_response(memcached_instance_st* instance,
+ memcached_result_st *result)
+{
+ char buffer[SMALL_STRING_LEN];
+
+ if (memcached_is_udp(instance->root))
+ {
+ return memcached_set_error(*instance, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT);
+ }
+
+
+ return _read_one_response(instance, buffer, sizeof(buffer), result);
+}
+
+memcached_return_t memcached_response(memcached_instance_st* instance,
+ memcached_result_st *result)
+{
+ char buffer[1024];
+
+ return memcached_response(instance, buffer, sizeof(buffer), result);
+}
+
+memcached_return_t memcached_response(memcached_instance_st* instance,
+ char *buffer, size_t buffer_length,
+ memcached_result_st *result)
+{
+ if (memcached_is_udp(instance->root))
+ {
+ return memcached_set_error(*instance, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT);
+ }
+
+ /* We may have old commands in the buffer not sent, first purge */
+ if ((instance->root->flags.no_block) and (memcached_is_processing_input(instance->root) == false))
+ {
+ (void)memcached_io_write(instance);
+ }
+
+ /* Before going into loop wait to see if we have any IO waiting for us */
+ if (0)
+ {
+ memcached_return_t read_rc= memcached_io_wait_for_read(instance);
+ fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, memcached_strerror(NULL, read_rc));
+ }
+
+ /*
+ * The previous implementation purged all pending requests and just
+ * returned the last one. Purge all pending messages to ensure backwards
+ * compatibility.
+ */
+ if (memcached_is_binary(instance->root) == false and memcached_server_response_count(instance) > 1)
+ {
+ memcached_result_st junked_result;
+ memcached_result_st *junked_result_ptr= memcached_result_create(instance->root, &junked_result);
+
+ assert(junked_result_ptr);
+
+ while (memcached_server_response_count(instance) > 1)
+ {
+ memcached_return_t rc= _read_one_response(instance, buffer, buffer_length, junked_result_ptr);
+
+ // @TODO should we return an error on another but a bad read case?
+ if (memcached_fatal(rc))
+ {
+ memcached_result_free(junked_result_ptr);
+ return rc;
+ }
+ }
+ memcached_result_free(junked_result_ptr);
+ }
+
+ return _read_one_response(instance, buffer, buffer_length, result);
+}
projects / awesomized / libmemcached / blobdiff