/**
* decode a packet into proto_field according to field->fielddef->type
*
* @param field field definition
* @returns 0 on success, -1 on error
*/
int network_mysqld_proto_get_myisam_field(network_packet *packet,
network_mysqld_myisam_field *field) {
guint64 length;
guint8 i8;
guint16 i16;
guint32 i32;
guint64 i64;
double d;
network_mysqld_column *column = field->column;
int err = 0;
switch ((guchar)column->type) {
case MYSQL_TYPE_DOUBLE:
/* a DOUBLE is stored in IEEE notation by just copying all 8 bytes */
err = err || (column->max_length != 8); /* has to be 8 bytes */
err = err || (packet->offset + 8 > packet->data->len);
if (!err) {
memcpy(&d, packet->data->str + packet->offset, 8);
err = err || network_mysqld_proto_skip(packet, 8);
}
if (!err) field->data.f = d;
break;
case MYSQL_TYPE_TIMESTAMP: /* int4store */
case MYSQL_TYPE_LONG:
err = err || network_mysqld_proto_get_int32(packet, &i32);
if (!err) field->data.i = i32;
break;
case MYSQL_TYPE_DATETIME: /* int8store */
case MYSQL_TYPE_LONGLONG:
err = err || network_mysqld_proto_get_int64(packet, &i64);
if (!err) field->data.i = i64;
break;
case MYSQL_TYPE_INT24:
case MYSQL_TYPE_DATE: /* int3store, a newdate, old-data is 4 byte */
err = err || network_mysqld_proto_get_int24(packet, &i32);
if (!err) field->data.i = i32;
break;
case MYSQL_TYPE_SHORT:
err = err || network_mysqld_proto_get_int16(packet, &i16);
if (!err) field->data.i = i16;
break;
case MYSQL_TYPE_TINY:
err = err || network_mysqld_proto_get_int8(packet, &i8);
if (!err) field->data.i = i8;
break;
case MYSQL_TYPE_ENUM:
switch (column->max_length) {
case 1:
err = err || network_mysqld_proto_get_int8(packet, &i8);
if (!err) field->data.i = i8;
break;
case 2:
err = err || network_mysqld_proto_get_int16(packet, &i16);
if (!err) field->data.i = i16;
break;
default:
g_error("%s: enum-length = %lu",
G_STRLOC,
column->max_length);
break;
}
break;
case MYSQL_TYPE_BLOB:
switch (column->max_length) {
case 1:
err = err || network_mysqld_proto_get_int8(packet, &i8);
if (!err) length = i8;
break;
case 2:
err = err || network_mysqld_proto_get_int16(packet, &i16);
if (!err) length = i16;
break;
case 3:
err = err || network_mysqld_proto_get_int24(packet, &i32);
if (!err) length = i32;
break;
case 4:
err = err || network_mysqld_proto_get_int32(packet, &i32);
if (!err) length = i32;
break;
default:
/* unknown blob-length */
g_debug_hexdump(G_STRLOC, S(packet->data));
g_error("%s: blob-length = %lu",
G_STRLOC,
column->max_length);
break;
}
err = err || network_mysqld_proto_get_string_len(packet, &field->data.s, length);
break;
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
if (column->max_length < 256) {
err = err || network_mysqld_proto_get_int8(packet, &i8);
err = err || network_mysqld_proto_get_string_len(packet, &field->data.s, i8);
} else {
err = err || network_mysqld_proto_get_int16(packet, &i16);
err = err || network_mysqld_proto_get_string_len(packet, &field->data.s, i16);
}
break;
case MYSQL_TYPE_NEWDECIMAL: {
/* the decimal is binary encoded
*/
guchar digits_per_bytes[] = { 0, 1, 1, 2, 2, 3, 3, 4, 4, 4 }; /* how many bytes are needed to store x decimal digits */
guint i_digits = column->max_length - column->decimals;
guint f_digits = column->decimals;
guint decimal_full_blocks = i_digits / 9; /* 9 decimal digits in 4 bytes */
guint decimal_last_block_digits = i_digits % 9; /* how many digits are left ? */
guint scale_full_blocks = f_digits / 9; /* 9 decimal digits in 4 bytes */
guint scale_last_block_digits = f_digits % 9; /* how many digits are left ? */
guint size = 0;
size += decimal_full_blocks * digits_per_bytes[9] + digits_per_bytes[decimal_last_block_digits];
size += scale_full_blocks * digits_per_bytes[9] + digits_per_bytes[scale_last_block_digits];
#if 0
g_debug_hexdump(G_STRLOC " (NEWDECIMAL)", packet->data->str, packet->data->len);
#endif
#if 0
g_critical("%s: don't know how to decode NEWDECIMAL(%lu, %u) at offset %u (%d)",
G_STRLOC,
column->max_length,
column->decimals,
packet->offset,
size
);
#endif
err = err || network_mysqld_proto_skip(packet, size);
break; }
default:
g_debug_hexdump(G_STRLOC, packet->data->str, packet->data->len);
g_error("%s: unknown field-type to fetch: %d",
G_STRLOC,
column->type);
break;
}
return err ? -1 : 0;
}
/**
* get the next row from the resultset
*
* returns a lua-table with the fields (starting at 1)
*
* @return 0 on error, 1 on success
*
*/
static int proxy_resultset_rows_iter(lua_State *L) {
GRef *ref = *(GRef **)lua_touserdata(L, lua_upvalueindex(1));
proxy_resultset_t *res = ref->udata;
network_packet packet;
GPtrArray *fields = res->fields;
gsize i;
int err = 0;
network_mysqld_lenenc_type lenenc_type;
GList *chunk = res->row;
g_return_val_if_fail(chunk != NULL, 0);
packet.data = chunk->data;
packet.offset = 0;
err = err || network_mysqld_proto_skip_network_header(&packet);
err = err || network_mysqld_proto_peek_lenenc_type(&packet, &lenenc_type);
g_return_val_if_fail(err == 0, 0); /* protocol error */
switch (lenenc_type) {
case NETWORK_MYSQLD_LENENC_TYPE_ERR:
/* a ERR packet instead of real rows
*
* like "explain select fld3 from t2 ignore index (fld3,not_existing)"
*
* see mysql-test/t/select.test
*/
case NETWORK_MYSQLD_LENENC_TYPE_EOF:
/* if we find the 2nd EOF packet we are done */
return 0;
case NETWORK_MYSQLD_LENENC_TYPE_INT:
case NETWORK_MYSQLD_LENENC_TYPE_NULL:
break;
}
lua_newtable(L);
for (i = 0; i < fields->len; i++) {
guint64 field_len;
err = err || network_mysqld_proto_peek_lenenc_type(&packet, &lenenc_type);
g_return_val_if_fail(err == 0, 0); /* protocol error */
switch (lenenc_type) {
case NETWORK_MYSQLD_LENENC_TYPE_NULL:
network_mysqld_proto_skip(&packet, 1);
lua_pushnil(L);
break;
case NETWORK_MYSQLD_LENENC_TYPE_INT:
err = err || network_mysqld_proto_get_lenenc_int(&packet, &field_len);
err = err || !(field_len <= packet.data->len); /* just to check that we don't overrun by the addition */
err = err || !(packet.offset + field_len <= packet.data->len); /* check that we have enough string-bytes for the length-encoded string */
if (err) return luaL_error(L, "%s: row-data is invalid", G_STRLOC);
lua_pushlstring(L, packet.data->str + packet.offset, field_len);
err = err || network_mysqld_proto_skip(&packet, field_len);
break;
default:
/* EOF and ERR should come up here */
err = 1;
break;
}
/* lua starts its tables at 1 */
lua_rawseti(L, -2, i + 1);
g_return_val_if_fail(err == 0, 0); /* protocol error */
}
res->row = res->row->next;
return 1;
}
int network_mysqld_proto_get_binlog_event(network_packet *packet,
network_mysqld_binlog *binlog,
network_mysqld_binlog_event *event) {
int err = 0;
int maj, min, pat;
if (binlog->checksum == NETWORK_MYSQLD_BINLOG_CHECKSUM_CRC32) {
/* patch the packet-len for the decoders as if there would be no checksum */
packet->data->len -= 4;
}
switch ((guchar)event->event_type) {
case QUERY_EVENT:
err = err || network_mysqld_proto_get_int32(packet, &event->event.query_event.thread_id);
err = err || network_mysqld_proto_get_int32(packet, &event->event.query_event.exec_time);
err = err || network_mysqld_proto_get_int8(packet, &event->event.query_event.db_name_len);
err = err || network_mysqld_proto_get_int16(packet, &event->event.query_event.error_code);
/* 5.0 has more flags */
if (packet->data->len > packet->offset) {
guint16 var_size = 0;
err = err || network_mysqld_proto_get_int16(packet, &var_size);
if (var_size) {
/* skip the variable size part for now */
err = err || network_mysqld_proto_skip(packet, var_size);
}
/* default db has <db_name_len> chars */
err = err || network_mysqld_proto_get_string_len(packet,
&event->event.query_event.db_name,
event->event.query_event.db_name_len);
err = err || network_mysqld_proto_skip(packet, 1); /* the \0 */
err = err || network_mysqld_proto_get_string_len(packet,
&event->event.query_event.query,
packet->data->len - packet->offset);
}
break;
case ROTATE_EVENT:
err = err || network_mysqld_proto_get_int32(packet, &event->event.rotate_event.binlog_pos);
err = err || network_mysqld_proto_skip(packet, 4);
err = err || network_mysqld_proto_get_string_len(
packet,
&event->event.rotate_event.binlog_file,
packet->data->len - packet->offset);
break;
case STOP_EVENT:
/* is empty */
break;
case FORMAT_DESCRIPTION_EVENT:
err = err || network_mysqld_proto_get_int16(packet, &event->event.format_event.binlog_version);
err = err || network_mysqld_proto_get_string_len( /* NUL-term string */
packet,
&event->event.format_event.master_version,
ST_SERVER_VER_LEN);
err = err || network_mysqld_proto_get_int32(packet,
&event->event.format_event.created_ts);
/* the header length may change in the future, for now we assume it is 19 */
err = err || network_mysqld_proto_get_int8(packet, &event->event.format_event.log_header_len);
g_assert_cmpint(event->event.format_event.log_header_len, ==, 19);
/* decode the server-version string into a integer */
err = err || (3 != sscanf(event->event.format_event.master_version, "%d.%d.%d%*s", &maj, &min, &pat));
err = err || (maj > 100 || maj < 0);
err = err || (min > 100 || min < 0);
err = err || (pat > 100 || pat < 0);
if ((maj << 16) + (min << 8) + (pat << 0) >= 0x050602) {
event->event.format_event.perm_events_len = packet->data->len - packet->offset;
g_assert_cmpint(event->event.format_event.perm_events_len, ==, ENUM_END_EVENT - 1 + 1 + 4);
event->event.format_event.perm_events_len -= 1 + 4; /* FIXME: check how it is implemented without CRC32 */
} else {
