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-rw-r--r--libmariadb/plugins/trace/trace_example.c458
1 files changed, 458 insertions, 0 deletions
diff --git a/libmariadb/plugins/trace/trace_example.c b/libmariadb/plugins/trace/trace_example.c
new file mode 100644
index 00000000..1060542c
--- /dev/null
+++ b/libmariadb/plugins/trace/trace_example.c
@@ -0,0 +1,458 @@
+/************************************************************************************
+ Copyright (C) 2015 MariaDB Corporation AB
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not see <http://www.gnu.org/licenses>
+ or write to the Free Software Foundation, Inc.,
+ 51 Franklin St., Fifth Floor, Boston, MA 02110, USA
+*************************************************************************************/
+#ifndef _WIN32
+#define _GNU_SOURCE 1
+#endif
+
+#include <ma_global.h>
+#include <mysql.h>
+#include <mysql/client_plugin.h>
+#include <string.h>
+#include <memory.h>
+
+#ifndef WIN32
+#include <dlfcn.h>
+#endif
+
+#define READ 0
+#define WRITE 1
+
+/* function prototypes */
+static int trace_init(char *errormsg,
+ size_t errormsg_size,
+ int unused __attribute__((unused)),
+ va_list unused1 __attribute__((unused)));
+static int trace_deinit(void);
+
+int (*register_callback)(my_bool register_callback,
+ void (*callback_function)(int mode, MYSQL *mysql, const uchar *buffer, size_t length));
+void trace_callback(int mode, MYSQL *mysql, const uchar *buffer, size_t length);
+
+#ifndef HAVE_TRACE_EXAMPLE_PLUGIN_DYNAMIC
+struct st_mysql_client_plugin trace_example_plugin=
+#else
+struct st_mysql_client_plugin _mysql_client_plugin_declaration_ =
+#endif
+{
+ MARIADB_CLIENT_TRACE_PLUGIN,
+ MARIADB_CLIENT_TRACE_PLUGIN_INTERFACE_VERSION,
+ "trace_example",
+ "Georg Richter",
+ "Trace example plugin",
+ {1,0,0},
+ "LGPL",
+ NULL,
+ &trace_init,
+ &trace_deinit,
+ NULL
+};
+
+static const char *commands[]= {
+ "COM_SLEEP",
+ "COM_QUIT",
+ "COM_INIT_DB",
+ "COM_QUERY",
+ "COM_FIELD_LIST",
+ "COM_CREATE_DB",
+ "COM_DROP_DB",
+ "COM_REFRESH",
+ "COM_SHUTDOWN",
+ "COM_STATISTICS",
+ "COM_PROCESS_INFO",
+ "COM_CONNECT",
+ "COM_PROCESS_KILL",
+ "COM_DEBUG",
+ "COM_PING",
+ "COM_TIME",
+ "COM_DELAYED_INSERT",
+ "COM_CHANGE_USER",
+ "COM_BINLOG_DUMP",
+ "COM_TABLE_DUMP",
+ "COM_CONNECT_OUT",
+ "COM_REGISTER_SLAVE",
+ "COM_STMT_PREPARE",
+ "COM_STMT_EXECUTE",
+ "COM_STMT_SEND_LONG_DATA",
+ "COM_STMT_CLOSE",
+ "COM_STMT_RESET",
+ "COM_SET_OPTION",
+ "COM_STMT_FETCH",
+ "COM_DAEMON",
+ "COM_END"
+};
+
+typedef struct {
+ unsigned long thread_id;
+ int last_command; /* COM_* values, -1 for handshake */
+ unsigned int max_packet_size;
+ unsigned int num_commands;
+ size_t total_size[2];
+ unsigned int client_flags;
+ char *username;
+ char *db;
+ char *command;
+ char *filename;
+ unsigned long refid; /* stmt_id, thread_id for kill */
+ uchar charset;
+ void *next;
+ int local_infile;
+ unsigned long pkt_length;
+} TRACE_INFO;
+
+#define TRACE_STATUS(a) ((!a) ? "ok" : "error")
+
+TRACE_INFO *trace_info= NULL;
+
+static TRACE_INFO *get_trace_info(unsigned long thread_id)
+{
+ TRACE_INFO *info= trace_info;
+
+ /* search connection */
+ while (info)
+ {
+ if (info->thread_id == thread_id)
+ return info;
+ else
+ info= (TRACE_INFO *)info->next;
+ }
+
+ if (!(info= (TRACE_INFO *)calloc(sizeof(TRACE_INFO), 1)))
+ return NULL;
+ info->thread_id= thread_id;
+ info->next= trace_info;
+ trace_info= info;
+ return info;
+}
+
+static void delete_trace_info(unsigned long thread_id)
+{
+ TRACE_INFO *last= NULL, *current;
+ current= trace_info;
+
+ while (current)
+ {
+ if (current->thread_id == thread_id)
+ {
+ printf("deleting thread %lu\n", thread_id);
+
+ if (last)
+ last->next= current->next;
+ else
+ trace_info= (TRACE_INFO *)current->next;
+ if (current->command)
+ free(current->command);
+ if (current->db)
+ free(current->db);
+ if (current->username)
+ free(current->username);
+ if (current->filename)
+ free(current->filename);
+ free(current);
+ }
+ last= current;
+ current= (TRACE_INFO *)current->next;
+ }
+
+}
+
+
+/* {{{ static int trace_init */
+/*
+ Initialization routine
+
+ SYNOPSIS
+ trace_init
+ unused1
+ unused2
+ unused3
+ unused4
+
+ DESCRIPTION
+ Init function registers a callback handler for PVIO interface.
+
+ RETURN
+ 0 success
+*/
+static int trace_init(char *errormsg,
+ size_t errormsg_size,
+ int unused1 __attribute__((unused)),
+ va_list unused2 __attribute__((unused)))
+{
+ void *func;
+
+#ifdef WIN32
+ if (!(func= GetProcAddress(GetModuleHandle(NULL), "ma_pvio_register_callback")))
+#else
+ if (!(func= dlsym(RTLD_DEFAULT, "ma_pvio_register_callback")))
+#endif
+ {
+ strncpy(errormsg, "Can't find ma_pvio_register_callback function", errormsg_size);
+ return 1;
+ }
+ register_callback= func;
+ register_callback(TRUE, trace_callback);
+
+ return 0;
+}
+/* }}} */
+
+static int trace_deinit(void)
+{
+ /* unregister plugin */
+ while(trace_info)
+ {
+ printf("Warning: Connection for thread %lu not properly closed\n", trace_info->thread_id);
+ trace_info= (TRACE_INFO *)trace_info->next;
+ }
+ register_callback(FALSE, trace_callback);
+ return 0;
+}
+
+static void trace_set_command(TRACE_INFO *info, char *buffer, size_t size)
+{
+ if (info->command)
+ free(info->command);
+
+ info->command= calloc(1, size + 1);
+ memcpy(info->command, buffer, size);
+}
+
+void dump_buffer(uchar *buffer, size_t len)
+{
+ uchar *p= buffer;
+ while (p < buffer + len)
+ {
+ printf("%02x ", *p);
+ p++;
+ }
+ printf("\n");
+}
+
+static void dump_simple(TRACE_INFO *info, my_bool is_error)
+{
+ printf("%8lu: %s %s\n", info->thread_id, commands[info->last_command], TRACE_STATUS(is_error));
+}
+
+static void dump_reference(TRACE_INFO *info, my_bool is_error)
+{
+ printf("%8lu: %s(%lu) %s\n", info->thread_id, commands[info->last_command], (long)info->refid, TRACE_STATUS(is_error));
+}
+
+static void dump_command(TRACE_INFO *info, my_bool is_error)
+{
+ size_t i;
+ printf("%8lu: %s(", info->thread_id, commands[info->last_command]);
+ for (i= 0; info->command && i < strlen(info->command); i++)
+ if (info->command[i] == '\n')
+ printf("\\n");
+ else if (info->command[i] == '\r')
+ printf("\\r");
+ else if (info->command[i] == '\t')
+ printf("\\t");
+ else
+ printf("%c", info->command[i]);
+ printf(") %s\n", TRACE_STATUS(is_error));
+}
+
+void trace_callback(int mode, MYSQL *mysql, const uchar *buffer, size_t length)
+{
+ unsigned long thread_id= mysql->thread_id;
+ TRACE_INFO *info;
+
+ /* check if package is server greeting package,
+ * and set thread_id */
+ if (!thread_id && mode == READ)
+ {
+ char *p= (char *)buffer;
+ p+= 4; /* packet length */
+ if ((uchar)*p != 0xFF) /* protocol version 0xFF indicates error */
+ {
+ p+= strlen(p + 1) + 2;
+ thread_id= uint4korr(p);
+ }
+ info= get_trace_info(thread_id);
+ info->last_command= -1;
+ }
+ else
+ {
+ char *p= (char *)buffer;
+ info= get_trace_info(thread_id);
+
+ if (info->last_command == -1)
+ {
+ if (mode == WRITE)
+ {
+ /* client authentication reply packet:
+ *
+ * ofs description length
+ * ------------------------
+ * 0 length 3
+ * 3 packet_no 1
+ * 4 client capab. 4
+ * 8 max_packet_size 4
+ * 12 character set 1
+ * 13 reserved 23
+ * ------------------------
+ * 36 username (zero terminated)
+ * len (1 byte) + password or
+ */
+
+ p+= 4;
+ info->client_flags= uint4korr(p);
+ p+= 4;
+ info->max_packet_size= uint4korr(p);
+ p+= 4;
+ info->charset= *p;
+ p+= 24;
+ info->username= strdup(p);
+ p+= strlen(p) + 1;
+ if (*p) /* we are not interested in authentication data */
+ p+= *p;
+ p++;
+ if (info->client_flags & CLIENT_CONNECT_WITH_DB)
+ info->db= strdup(p);
+ }
+ else
+ {
+ p++;
+ if ((uchar)*p == 0xFF)
+ printf("%8lu: CONNECT_ERROR(%d)\n", info->thread_id, uint4korr(p+1));
+ else
+ printf("%8lu: CONNECT_SUCCESS(host=%s,user=%s,db=%s)\n", info->thread_id,
+ mysql->host, info->username, info->db ? info->db : "'none'");
+ info->last_command= COM_SLEEP;
+ }
+ }
+ else {
+ char *p= (char *)buffer;
+ int len;
+
+ if (mode == WRITE)
+ {
+ if (info->pkt_length > 0)
+ {
+ info->pkt_length-= length;
+ return;
+ }
+ len= uint3korr(p);
+ info->pkt_length= len + 4 - length;
+ p+= 4;
+ info->last_command= *p;
+ p++;
+
+ switch (info->last_command) {
+ case COM_INIT_DB:
+ case COM_DROP_DB:
+ case COM_CREATE_DB:
+ case COM_DEBUG:
+ case COM_QUERY:
+ case COM_STMT_PREPARE:
+ trace_set_command(info, p, len - 1);
+ break;
+ case COM_PROCESS_KILL:
+ info->refid= uint4korr(p);
+ break;
+ case COM_QUIT:
+ printf("%8lu: COM_QUIT\n", info->thread_id);
+ delete_trace_info(info->thread_id);
+ break;
+ case COM_PING:
+ printf("%8lu: COM_PING\n", info->thread_id);
+ break;
+ case COM_STMT_EXECUTE:
+ case COM_STMT_RESET:
+ case COM_STMT_CLOSE:
+ info->refid= uint4korr(p);
+ break;
+ case COM_CHANGE_USER:
+ break;
+ default:
+ if (info->local_infile == 1)
+ {
+ printf("%8lu: SEND_LOCAL_INFILE(%s) ", info->thread_id, info->filename);
+ if (len)
+ printf("sent %d bytes\n", len);
+ else
+ printf("- error\n");
+ info->local_infile= 2;
+ }
+ else
+ printf("%8lu: UNKNOWN_COMMAND: %d\n", info->thread_id, info->last_command);
+ break;
+ }
+ }
+ else
+ {
+ my_bool is_error;
+
+ len= uint3korr(p);
+ p+= 4;
+
+ is_error= (len == -1);
+
+ switch(info->last_command) {
+ case COM_STMT_EXECUTE:
+ case COM_STMT_RESET:
+ case COM_STMT_CLOSE:
+ case COM_PROCESS_KILL:
+ dump_reference(info, is_error);
+ info->refid= 0;
+ info->last_command= 0;
+ break;
+ case COM_QUIT:
+ dump_simple(info, is_error);
+ break;
+ case COM_QUERY:
+ case COM_INIT_DB:
+ case COM_DROP_DB:
+ case COM_CREATE_DB:
+ case COM_DEBUG:
+ case COM_CHANGE_USER:
+ if (info->last_command == COM_QUERY && (uchar)*p == 251)
+ {
+ info->local_infile= 1;
+ p++;
+ info->filename= (char *)malloc(len);
+ strncpy(info->filename, (char *)p, len);
+ dump_command(info, is_error);
+ break;
+ }
+ dump_command(info, is_error);
+ if (info->local_infile != 1)
+ {
+ free(info->command);
+ info->command= NULL;
+ }
+ break;
+ case COM_STMT_PREPARE:
+ printf("%8lu: COM_STMT_PREPARE(%s) ", info->thread_id, info->command);
+ if (!*p)
+ {
+ unsigned long stmt_id= uint4korr(p+1);
+ printf("-> stmt_id(%lu)\n", stmt_id);
+ }
+ else
+ printf("error\n");
+ break;
+ }
+ }
+ }
+ }
+ info->total_size[mode]+= length;
+}
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