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Unused vars and commend removed

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This commit is contained in:
Massimiliano Pinto
2013-06-25 16:29:09 +02:00
parent c770f74f3e
commit 2663c38708
2 changed files with 0 additions and 1520 deletions
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942
core/gateway_mysql_protocol.c
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@ -41,563 +41,11 @@
#include <buffer.h> #include <buffer.h>
#include <openssl/sha.h> #include <openssl/sha.h>
/*
* mysql_send_ok
*
* Send a MySQL protocol OK message to the dcb
*
* @param dcb Descriptor Control Block for the connection to which the OK is sent
* @param packet_number
* @param in_affected_rows
* @param mysql_message
* @return packet length
*
*/
int
mysql_send_ok(DCB *dcb, int packet_number, int in_affected_rows, const char* mysql_message) {
int n = 0;
uint8_t *outbuf = NULL;
uint8_t mysql_payload_size = 0;
uint8_t mysql_packet_header[4];
uint8_t *mysql_payload = NULL;
uint8_t field_count = 0;
uint8_t affected_rows = 0;
uint8_t insert_id = 0;
uint8_t mysql_server_status[2];
uint8_t mysql_warning_count[2];
GWBUF *buf;
affected_rows = in_affected_rows;
mysql_payload_size = sizeof(field_count) + sizeof(affected_rows) + sizeof(insert_id) + sizeof(mysql_server_status) + sizeof(mysql_warning_count);
if (mysql_message != NULL) {
mysql_payload_size += strlen(mysql_message);
}
// allocate memory for packet header + payload
if ((buf = gwbuf_alloc(sizeof(mysql_packet_header) + mysql_payload_size)) == NULL)
{
return 0;
}
outbuf = GWBUF_DATA(buf);
// write packet header with packet number
gw_mysql_set_byte3(mysql_packet_header, mysql_payload_size);
mysql_packet_header[3] = packet_number;
// write header
memcpy(outbuf, mysql_packet_header, sizeof(mysql_packet_header));
mysql_payload = outbuf + sizeof(mysql_packet_header);
mysql_server_status[0] = 2;
mysql_server_status[1] = 0;
mysql_warning_count[0] = 0;
mysql_warning_count[1] = 0;
// write data
memcpy(mysql_payload, &field_count, sizeof(field_count));
mysql_payload = mysql_payload + sizeof(field_count);
memcpy(mysql_payload, &affected_rows, sizeof(affected_rows));
mysql_payload = mysql_payload + sizeof(affected_rows);
memcpy(mysql_payload, &insert_id, sizeof(insert_id));
mysql_payload = mysql_payload + sizeof(insert_id);
memcpy(mysql_payload, mysql_server_status, sizeof(mysql_server_status));
mysql_payload = mysql_payload + sizeof(mysql_server_status);
memcpy(mysql_payload, mysql_warning_count, sizeof(mysql_warning_count));
mysql_payload = mysql_payload + sizeof(mysql_warning_count);
if (mysql_message != NULL) {
memcpy(mysql_payload, mysql_message, strlen(mysql_message));
}
// write data
dcb->func.write(dcb, buf);
return sizeof(mysql_packet_header) + mysql_payload_size;
}
/*
* mysql_send_auth_error
*
* Send a MySQL protocol ERR message, for gatewayauthentication error to the dcb
*
* @param dcb Descriptor Control Block for the connection to which the OK is sent
* @param packet_number
* @param in_affected_rows
* @param mysql_message
* @return packet lenght
*
*/
int
mysql_send_auth_error (DCB *dcb, int packet_number, int in_affected_rows, const char* mysql_message) {
uint8_t *outbuf = NULL;
uint8_t mysql_payload_size = 0;
uint8_t mysql_packet_header[4];
uint8_t *mysql_payload = NULL;
uint8_t field_count = 0;
uint8_t affected_rows = 0;
uint8_t insert_id = 0;
uint8_t mysql_err[2];
uint8_t mysql_statemsg[6];
unsigned int mysql_errno = 0;
const char *mysql_error_msg = NULL;
const char *mysql_state = NULL;
GWBUF *buf;
mysql_errno = 1045;
mysql_error_msg = "Access denied!";
mysql_state = "2800";
field_count = 0xff;
gw_mysql_set_byte2(mysql_err, mysql_errno);
mysql_statemsg[0]='#';
memcpy(mysql_statemsg+1, mysql_state, 5);
if (mysql_message != NULL) {
mysql_error_msg = mysql_message;
} else {
mysql_error_msg = "Access denied!";
}
mysql_payload_size = sizeof(field_count) + sizeof(mysql_err) + sizeof(mysql_statemsg) + strlen(mysql_error_msg);
// allocate memory for packet header + payload
if ((buf = gwbuf_alloc(sizeof(mysql_packet_header) + mysql_payload_size)) == NULL)
{
return 0;
}
outbuf = GWBUF_DATA(buf);
// write packet header with packet number
gw_mysql_set_byte3(mysql_packet_header, mysql_payload_size);
mysql_packet_header[3] = packet_number;
// write header
memcpy(outbuf, mysql_packet_header, sizeof(mysql_packet_header));
mysql_payload = outbuf + sizeof(mysql_packet_header);
// write field
memcpy(mysql_payload, &field_count, sizeof(field_count));
mysql_payload = mysql_payload + sizeof(field_count);
// write errno
memcpy(mysql_payload, mysql_err, sizeof(mysql_err));
mysql_payload = mysql_payload + sizeof(mysql_err);
// write sqlstate
memcpy(mysql_payload, mysql_statemsg, sizeof(mysql_statemsg));
mysql_payload = mysql_payload + sizeof(mysql_statemsg);
// write err messg
memcpy(mysql_payload, mysql_error_msg, strlen(mysql_error_msg));
// write data
dcb->func.write(dcb, buf);
return sizeof(mysql_packet_header) + mysql_payload_size;
}
/*
* MySQLSendHandshake
*
* @param dcb The descriptor control block to use for sendign the handshake request
* @return
*/
int
MySQLSendHandshake(DCB* dcb)
{
int n = 0;
uint8_t *outbuf = NULL;
uint8_t mysql_payload_size = 0;
uint8_t mysql_packet_header[4];
uint8_t mysql_packet_id = 0;
uint8_t mysql_filler = GW_MYSQL_HANDSHAKE_FILLER;
uint8_t mysql_protocol_version = GW_MYSQL_PROTOCOL_VERSION;
uint8_t *mysql_handshake_payload = NULL;
uint8_t mysql_thread_id[4];
uint8_t mysql_scramble_buf[9] = "";
uint8_t mysql_plugin_data[13] = "";
uint8_t mysql_server_capabilities_one[2];
uint8_t mysql_server_capabilities_two[2];
uint8_t mysql_server_language = 8;
uint8_t mysql_server_status[2];
uint8_t mysql_scramble_len = 21;
uint8_t mysql_filler_ten[10];
uint8_t mysql_last_byte = 0x00;
char server_scramble[GW_MYSQL_SCRAMBLE_SIZE + 1]="";
MySQLProtocol *protocol = DCB_PROTOCOL(dcb, MySQLProtocol);
GWBUF *buf;
gw_generate_random_str(server_scramble, GW_MYSQL_SCRAMBLE_SIZE);
// copy back to the caller
memcpy(protocol->scramble, server_scramble, GW_MYSQL_SCRAMBLE_SIZE);
// fill the handshake packet
memset(&mysql_filler_ten, 0x00, sizeof(mysql_filler_ten));
// thread id, now put thePID
gw_mysql_set_byte4(mysql_thread_id, getpid() + dcb->fd);
memcpy(mysql_scramble_buf, server_scramble, 8);
memcpy(mysql_plugin_data, server_scramble + 8, 12);
mysql_payload_size = sizeof(mysql_protocol_version) + (strlen(GW_MYSQL_VERSION) + 1) + sizeof(mysql_thread_id) + 8 + sizeof(mysql_filler) + sizeof(mysql_server_capabilities_one) + sizeof(mysql_server_language) + sizeof(mysql_server_status) + sizeof(mysql_server_capabilities_two) + sizeof(mysql_scramble_len) + sizeof(mysql_filler_ten) + 12 + sizeof(mysql_last_byte) + strlen("mysql_native_password") + sizeof(mysql_last_byte);
// allocate memory for packet header + payload
if ((buf = gwbuf_alloc(sizeof(mysql_packet_header) + mysql_payload_size)) == NULL)
{
return 0;
}
outbuf = GWBUF_DATA(buf);
// write packet heder with mysql_payload_size
gw_mysql_set_byte3(mysql_packet_header, mysql_payload_size);
//mysql_packet_header[0] = mysql_payload_size;
// write packent number, now is 0
mysql_packet_header[3]= mysql_packet_id;
memcpy(outbuf, mysql_packet_header, sizeof(mysql_packet_header));
// current buffer pointer
mysql_handshake_payload = outbuf + sizeof(mysql_packet_header);
// write protocol version
memcpy(mysql_handshake_payload, &mysql_protocol_version, sizeof(mysql_protocol_version));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_protocol_version);
// write server version plus 0 filler
strcpy(mysql_handshake_payload, GW_MYSQL_VERSION);
mysql_handshake_payload = mysql_handshake_payload + strlen(GW_MYSQL_VERSION);
*mysql_handshake_payload = 0x00;
mysql_handshake_payload++;
// write thread id
memcpy(mysql_handshake_payload, mysql_thread_id, sizeof(mysql_thread_id));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_thread_id);
// write scramble buf
memcpy(mysql_handshake_payload, mysql_scramble_buf, 8);
mysql_handshake_payload = mysql_handshake_payload + 8;
*mysql_handshake_payload = GW_MYSQL_HANDSHAKE_FILLER;
mysql_handshake_payload++;
// write server capabilities part one
mysql_server_capabilities_one[0] = GW_MYSQL_SERVER_CAPABILITIES_BYTE1;
mysql_server_capabilities_one[1] = GW_MYSQL_SERVER_CAPABILITIES_BYTE2;
mysql_server_capabilities_one[0] &= ~GW_MYSQL_CAPABILITIES_COMPRESS;
mysql_server_capabilities_one[0] &= ~GW_MYSQL_CAPABILITIES_SSL;
memcpy(mysql_handshake_payload, mysql_server_capabilities_one, sizeof(mysql_server_capabilities_one));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_server_capabilities_one);
// write server language
memcpy(mysql_handshake_payload, &mysql_server_language, sizeof(mysql_server_language));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_server_language);
//write server status
mysql_server_status[0] = 2;
mysql_server_status[1] = 0;
memcpy(mysql_handshake_payload, mysql_server_status, sizeof(mysql_server_status));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_server_status);
//write server capabilities part two
mysql_server_capabilities_two[0] = 15;
mysql_server_capabilities_two[1] = 128;
memcpy(mysql_handshake_payload, mysql_server_capabilities_two, sizeof(mysql_server_capabilities_two));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_server_capabilities_two);
// write scramble_len
memcpy(mysql_handshake_payload, &mysql_scramble_len, sizeof(mysql_scramble_len));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_scramble_len);
//write 10 filler
memcpy(mysql_handshake_payload, mysql_filler_ten, sizeof(mysql_filler_ten));
mysql_handshake_payload = mysql_handshake_payload + sizeof(mysql_filler_ten);
// write plugin data
memcpy(mysql_handshake_payload, mysql_plugin_data, 12);
mysql_handshake_payload = mysql_handshake_payload + 12;
//write last byte, 0
*mysql_handshake_payload = 0x00;
mysql_handshake_payload++;
// to be understanded ????
memcpy(mysql_handshake_payload, "mysql_native_password", strlen("mysql_native_password"));
mysql_handshake_payload = mysql_handshake_payload + strlen("mysql_native_password");
//write last byte, 0
*mysql_handshake_payload = 0x00;
mysql_handshake_payload++;
// write data
dcb->func.write(dcb, buf);
return sizeof(mysql_packet_header) + mysql_payload_size;
}
/*
* gw_mysql_do_authentication
*
* Performs the MySQL protocol 4.1 authentication, using data in GWBUF *queue
*
* The useful data: user, db, client_sha1 are copied into the MYSQL_session * dcb->session->data
* client_capabilitiesa are copied into the dcb->protocol
*
* @param dcb Descriptor Control Block of the client
* @param The GWBUF with data from client
* @return 0 for Authentication ok, !=1 for failed autht
*
*/
int gw_mysql_do_authentication(DCB *dcb, GWBUF *queue) {
MySQLProtocol *protocol = NULL;
uint32_t client_capabilities;
int compress = -1;
int connect_with_db = -1;
uint8_t *client_auth_packet = GWBUF_DATA(queue);
char *username = NULL;
char *database = NULL;
unsigned int auth_token_len = 0;
uint8_t *auth_token = NULL;
uint8_t *stage1_hash = NULL;
int auth_ret = -1;
SESSION *session = NULL;
MYSQL_session *client_data = NULL;
if (dcb)
protocol = DCB_PROTOCOL(dcb, MySQLProtocol);
session = DCB_SESSION(dcb);
client_data = (MYSQL_session *)session->data;
stage1_hash = client_data->client_sha1;
username = client_data->user;
database = client_data->db;
//username = malloc(128);
//database = malloc(128);
//stage1_hash = malloc(20);
memcpy(&protocol->client_capabilities, client_auth_packet + 4, 4);
connect_with_db = GW_MYSQL_CAPABILITIES_CONNECT_WITH_DB & gw_mysql_get_byte4(&protocol->client_capabilities);
compress = GW_MYSQL_CAPABILITIES_COMPRESS & gw_mysql_get_byte4(&protocol->client_capabilities);
strncpy(username, client_auth_packet + 4 + 4 + 4 + 1 + 23, 128);
memcpy(&auth_token_len, client_auth_packet + 4 + 4 + 4 + 1 + 23 + strlen(username) + 1, 1);
auth_token = (uint8_t *)malloc(auth_token_len);
memcpy(auth_token, client_auth_packet + 4 + 4 + 4 + 1 + 23 + strlen(username) + 1 + 1, auth_token_len);
if (connect_with_db) {
fprintf(stderr, "<<< Client is connected with db\n");
} else {
fprintf(stderr, "<<< Client is NOT connected with db\n");
}
if (connect_with_db) {
strncpy(database, client_auth_packet + 4 + 4 + 4 + 1 + 23 + strlen(username) + 1 + 1 + auth_token_len, 128);
}
fprintf(stderr, "<<< Client selected db is [%s]\n", database);
fprintf(stderr, "<<< Client username is [%s]\n", username);
// decode the token and check the password
auth_ret = gw_check_mysql_scramble_data(auth_token, auth_token_len, protocol->scramble, sizeof(protocol->scramble), username, stage1_hash);
if (auth_ret == 0) {
fprintf(stderr, "<<< CLIENT AUTH is OK\n");
} else {
fprintf(stderr, "<<< CLIENT AUTH FAILED\n");
}
return auth_ret;
}
/////////////////////////////////////////////////
// get the sha1(sha1(password) from repository
/////////////////////////////////////////////////
int gw_find_mysql_user_password_sha1(char *username, uint8_t *gateway_password, void *repository) {
uint8_t hash1[SHA_DIGEST_LENGTH];
if (strcmp(username , "root") == 0) {
return 1;
}
gw_sha1_str(username, strlen(username), hash1);
gw_sha1_str(hash1, SHA_DIGEST_LENGTH, gateway_password);
return 0;
}
int gw_check_mysql_scramble_data(uint8_t *token, unsigned int token_len, uint8_t *scramble, unsigned int scramble_len, char *username, uint8_t *stage1_hash) {
uint8_t step1[GW_MYSQL_SCRAMBLE_SIZE]="";
uint8_t step2[GW_MYSQL_SCRAMBLE_SIZE +1]="";
uint8_t check_hash[GW_MYSQL_SCRAMBLE_SIZE]="";
char hex_double_sha1[2 * GW_MYSQL_SCRAMBLE_SIZE + 1]="";
uint8_t password[GW_MYSQL_SCRAMBLE_SIZE]="";
int ret_val = 1;
if ((username == NULL) || (token == NULL) || (scramble == NULL) || (stage1_hash == NULL)) {
return 1;
}
// get the user's password from repository in SHA1(SHA1(real_password));
// please note 'real_password' in unknown!
ret_val = gw_find_mysql_user_password_sha1(username, password, NULL);
if (ret_val) {
//fprintf(stderr, "<<<< User [%s] not found\n", username);
return 1;
} else {
//fprintf(stderr, "<<<< User [%s] OK\n", username);
}
// convert in hex format: this is the content of mysql.user table, field password without the '*' prefix
// an it is 40 bytes long
gw_bin2hex(hex_double_sha1, password, SHA_DIGEST_LENGTH);
///////////////////////////
// Auth check in 3 steps
//////////////////////////
// Note: token = XOR (SHA1(real_password), SHA1(CONCAT(scramble, SHA1(SHA1(real_password)))))
// the client sends token
//
// Now, server side:
//
/////////////
// step 1: compute the STEP1 = SHA1(CONCAT(scramble, gateway_password))
// the result in step1 is SHA_DIGEST_LENGTH long
////////////
gw_sha1_2_str(scramble, scramble_len, password, SHA_DIGEST_LENGTH, step1);
////////////
// step2: STEP2 = XOR(token, STEP1)
////////////
// token is trasmitted form client and it's based on the handshake scramble and SHA1(real_passowrd)
// step1 has been computed in the previous step
// the result STEP2 is SHA1(the_password_to_check) and is SHA_DIGEST_LENGTH long
gw_str_xor(step2, token, step1, token_len);
// copy the stage1_hash back to the caller
// stage1_hash will be used for backend authentication
memcpy(stage1_hash, step2, SHA_DIGEST_LENGTH);
///////////
// step 3: prepare the check_hash
///////////
// compute the SHA1(STEP2) that is SHA1(SHA1(the_password_to_check)), and is SHA_DIGEST_LENGTH long
gw_sha1_str(step2, SHA_DIGEST_LENGTH, check_hash);
#ifdef GW_DEBUG_CLIENT_AUTH
{
char inpass[128]="";
gw_bin2hex(inpass, check_hash, SHA_DIGEST_LENGTH);
//fprintf(stderr, "The CLIENT hex(SHA1(SHA1(password))) for \"%s\" is [%s]", username, inpass);
}
#endif
// now compare SHA1(SHA1(gateway_password)) and check_hash: return 0 is MYSQL_AUTH_OK
return memcmp(password, check_hash, SHA_DIGEST_LENGTH);
}
int gw_mysql_read_packet_10(DCB *dcb, uint8_t *buffer) {
int n;
n = do_read_dcb10(dcb, buffer);
return n;
}
int gw_mysql_read_packet(DCB *dcb, uint8_t *buffer) {
int n;
n = do_read_buffer(dcb, buffer);
return n;
}
int gw_mysql_read_command(DCB *dcb) {
int packet_no;
MySQLProtocol *protocol = DCB_PROTOCOL(dcb, MySQLProtocol);
packet_no = do_read_dcb(dcb);
if (packet_no == -2)
return 1;
if (packet_no < 0) {
fprintf(stderr, "DCB [%i], EPOLLIN Protocol exiting from MYSQL_IDLE [%i], Packet #%i for socket %i, scramble [%s]\n", dcb->state, protocol->state, packet_no, dcb->fd, protocol->scramble);
(dcb->func).error(dcb);
fprintf(stderr, "closing fd [%i], from MYSQL_IDLE\n", dcb->fd);
if (dcb->fd) {
if (!close (dcb->fd)) {
if(dcb) {
SESSION *temp = dcb->session;
if (dcb->session) {
if (temp->backends) {
gw_mysql_close((MySQLProtocol **)&(temp->backends)->protocol);
//if(dcb->backend)
//free(dcb->protocol);
free(dcb->session);
}
}
free(dcb);
}
}
}
// client session closed, continue
return 1;
} else {
packet_no++;
}
// send read data to backend ...
// coming soon|
fprintf(stderr, "DCB [%i], EPOLLIN Protocol is responding from MYSQL_IDLE [%i], Packet #%i for socket %i, scramble [%s]\n", dcb->state, protocol->state, packet_no, dcb->fd, protocol->scramble);
// could be a mysql_ping() reply
// writing the result set would come from async read from backends
mysql_send_ok(dcb, packet_no, 0, NULL);
return 0;
}
/////////////////////////////////////// ///////////////////////////////////////
// MYSQL_conn structure setup // MYSQL_conn structure setup
/////////////////////////////////////// ///////////////////////////////////////
MySQLProtocol *gw_mysql_init(MySQLProtocol *data) { MySQLProtocol *gw_mysql_init(MySQLProtocol *data) {
int rv = -1;
MySQLProtocol *input = NULL; MySQLProtocol *input = NULL;
@ -619,396 +67,6 @@ MySQLProtocol *gw_mysql_init(MySQLProtocol *data) {
/*
* Create a new MySQL connection.
*
* This routine performs the full MySQL connection to the specified server.
* It does
* - socket init
* - socket connect
* - server handshake parsing
* - authenticatio reply
* - the Auth ack receive
*
* Please note, all socket operation are in blocking state
* Status: work in progress.
*
* @param host The TCP/IP host address to connect to
* @param port The TCP/IP host port to connect to
* @param dbname The optional database name. Use NULL if not interested in
* @param user The MySQL database Username: required
* @param passwd The MySQL database Password: required
* @param conn The MySQLProtocol structure to be filled: must be preallocated with gw_mysql_init()
* @return 0 on Success or 1 on Failure.
*/
int gw_mysql_connect(char *host, int port, char *dbname, char *user, char *passwd, MySQLProtocol *conn) {
struct sockaddr_in serv_addr;
socklen_t addrlen;
int compress = 0;
int rv;
int so = 0;
int ciclo = 0;
char buffer[SMALL_CHUNK];
uint8_t packet_buffer[SMALL_CHUNK];
char errmesg[128];
uint8_t *payload = NULL;
int server_protocol;
char server_version[100]="";
uint8_t *server_version_end = NULL;
uint16_t mysql_server_capabilities_one;
uint16_t mysql_server_capabilities_two;
int fd;
unsigned long tid =0;
long bytes;
uint8_t scramble_data_1[8 + 1] = "";
uint8_t scramble_data_2[12 + 1] = "";
uint8_t scramble_data[GW_MYSQL_SCRAMBLE_SIZE + 1] = "";
uint8_t capab_ptr[4];
int scramble_len;
uint8_t scramble[GW_MYSQL_SCRAMBLE_SIZE + 1];
uint8_t client_scramble[GW_MYSQL_SCRAMBLE_SIZE + 1];
uint8_t client_capabilities[4];
uint32_t server_capabilities;
uint32_t final_capabilities;
char dbpass[500]="";
conn->state = MYSQL_ALLOC;
conn->fd = -1;
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, ")))) Connect to MySQL: user[%s], SHA1(passwd)[%s], db [%s]\n", user, passwd, dbname);
#endif
memset(&serv_addr, 0, sizeof serv_addr);
serv_addr.sin_family = AF_INET;
so = socket(AF_INET,SOCK_STREAM,0);
if (so < 0) {
fprintf(stderr, "Errore creazione socket: [%s] %i\n", strerror(errno), errno);
return 1;
}
conn->fd = so;
setipaddress(&serv_addr.sin_addr, host);
serv_addr.sin_port = htons(port);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Socket initialized\n");
fflush(stderr);
#endif
while(1) {
if ((rv = connect(so, (struct sockaddr *)&serv_addr, sizeof(serv_addr))) < 0) {
fprintf(stderr, "Errore connect %i, %s: RV = [%i]\n", errno, strerror(errno), rv);
if (errno == EINPROGRESS) {
continue;
} else {
close(so);
return -1;
}
} else {
break;
}
}
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "CONNECT is DONE\n");
fprintf(stderr, "Socket FD is %i\n", so);
fflush(stderr);
#endif
memset(&buffer, '\0', sizeof(buffer));
bytes = 16384;
rv = read(so, buffer, bytes);
if ( rv >0 ) {
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "RESPONSE ciclo %i HO letto [%s] bytes %li\n",ciclo, buffer, bytes);
fflush(stderr);
#endif
ciclo++;
} else {
if (rv == 0 && errno == EOF) {
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "EOF reached. Bytes = %li\n", bytes);
fflush(stderr);
#endif
} else {
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "###### Receive error FINAL : connection not completed %i %s: RV = [%i]\n", errno, strerror(errno), rv);
#endif
close(so);
return -1;
}
}
#ifdef MYSQL_CONN_DEBUG
fwrite(buffer, bytes, 1, stderr);
fflush(stderr);
#endif
//decode mysql handshake
payload = buffer + 4;
server_protocol= payload[0];
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Server Protocol [%i]\n", server_protocol);
#endif
payload++;
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Protocol Version [%s]\n", payload);
fflush(stderr);
#endif
server_version_end = gw_strend((char*) payload);
payload = server_version_end + 1;
// TID
tid = gw_mysql_get_byte4(payload);
memcpy(&conn->tid, &tid, 4);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Thread ID is %lu\n", conn->tid);
fflush(stderr);
#endif
payload +=4;
// scramble_part 1
memcpy(scramble_data_1, payload, 8);
payload += 8;
// 1 filler
payload++;
mysql_server_capabilities_one = gw_mysql_get_byte2(payload);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Capab_1[\n");
fwrite(&mysql_server_capabilities_one, 2, 1, stderr);
fflush(stderr);
#endif
//2 capab_part 1 + 1 language + 2 server_status
payload +=5;
mysql_server_capabilities_two = gw_mysql_get_byte2(payload);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "]Capab_2[\n");
fwrite(&mysql_server_capabilities_two, 2, 1, stderr);
fprintf(stderr, "]\n");
fflush(stderr);
#endif
memcpy(&capab_ptr, &mysql_server_capabilities_one, 2);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Capab_1[\n");
fwrite(capab_ptr, 2, 1, stderr);
fflush(stderr);
#endif
memcpy(&(capab_ptr[2]), &mysql_server_capabilities_two, 2);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Capab_2[\n");
fwrite(capab_ptr, 2, 1, stderr);
fflush(stderr);
#endif
// 2 capab_part 2
payload+=2;
scramble_len = payload[0] -1;
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Scramble_len [%i]\n", scramble_len);
fflush(stderr);
#endif
payload += 11;
memcpy(scramble_data_2, payload, scramble_len - 8);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Scramble_buff1[");
fwrite(scramble_data_1, 8, 1, stderr);
fprintf(stderr, "]\nScramble_buff2 [");
fwrite(scramble_data_2, scramble_len - 8, 1, stderr);
fprintf(stderr, "]\n");
fflush(stderr);
#endif
memcpy(scramble, scramble_data_1, 8);
memcpy(scramble + 8, scramble_data_2, scramble_len - 8);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Full Scramble 20 bytes is [\n");
fwrite(scramble, GW_MYSQL_SCRAMBLE_SIZE, 1, stderr);
fprintf(stderr, "\n]\n");
fflush(stderr);
#endif
memcpy(conn->scramble, scramble, GW_MYSQL_SCRAMBLE_SIZE);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Scramble from MYSQL_Conn is [\n");
fwrite(scramble, GW_MYSQL_SCRAMBLE_SIZE, 1, stderr);
fprintf(stderr, "\n]\n");
fflush(stderr);
fprintf(stderr, "Now sending user, pass & db\n[");
fwrite(&server_capabilities, 4, 1, stderr);
fprintf(stderr, "]\n");
#endif
final_capabilities = gw_mysql_get_byte4((uint8_t *)&server_capabilities);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "CAPABS [%u]\n", final_capabilities);
fflush(stderr);
#endif
memset(packet_buffer, '\0', sizeof(packet_buffer));
//packet_header(byte3 +1 pack#)
packet_buffer[3] = '\x01';
final_capabilities |= GW_MYSQL_CAPABILITIES_PROTOCOL_41;
final_capabilities |= GW_MYSQL_CAPABILITIES_CLIENT;
if (compress) {
final_capabilities |= GW_MYSQL_CAPABILITIES_COMPRESS;
fprintf(stderr, "Backend Connection with compression\n");
fflush(stderr);
}
if (passwd != NULL) {
uint8_t hash1[GW_MYSQL_SCRAMBLE_SIZE]="";
uint8_t hash2[GW_MYSQL_SCRAMBLE_SIZE]="";
uint8_t new_sha[GW_MYSQL_SCRAMBLE_SIZE]="";
memcpy(hash1, passwd, GW_MYSQL_SCRAMBLE_SIZE);
gw_sha1_str(hash1, GW_MYSQL_SCRAMBLE_SIZE, hash2);
gw_bin2hex(dbpass, hash2, GW_MYSQL_SCRAMBLE_SIZE);
gw_sha1_2_str(scramble, GW_MYSQL_SCRAMBLE_SIZE, hash2, GW_MYSQL_SCRAMBLE_SIZE, new_sha);
gw_str_xor(client_scramble, new_sha, hash1, GW_MYSQL_SCRAMBLE_SIZE);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Hash1 [%s]\n", hash1);
fprintf(stderr, "Hash2 [%s]\n", hash2);
fprintf(stderr, "SHA1(SHA1(password in hex)\n");
fprintf(stderr, "PAss [%s]\n", dbpass);
fflush(stderr);
fprintf(stderr, "newsha [%s]\n", new_sha);
fprintf(stderr, "Client send scramble 20 [\n");
fwrite(client_scramble, GW_MYSQL_SCRAMBLE_SIZE, 1, stderr);
fprintf(stderr, "\n]\n");
fflush(stderr);
#endif
}
if (dbname == NULL) {
// now without db!!
final_capabilities &= ~GW_MYSQL_CAPABILITIES_CONNECT_WITH_DB;
} else {
final_capabilities |= GW_MYSQL_CAPABILITIES_CONNECT_WITH_DB;
}
gw_mysql_set_byte4(client_capabilities, final_capabilities);
memcpy(packet_buffer + 4, client_capabilities, 4);
//packet_buffer[4] = '\x8d';
//packet_buffer[5] = '\xa6';
//packet_buffer[6] = '\x0f';
//packet_buffer[7] = '\x00';
gw_mysql_set_byte4(packet_buffer + 4 + 4, 16777216);
packet_buffer[12] = '\x08';
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "User is [%s]\n", user);
fflush(stderr);
#endif
strcpy(packet_buffer+36, user);
bytes = 32 + 22 + 1 + 1;
bytes += strlen(user);
if (dbname == NULL) {
//strcpy(packet_buffer+36 + 5 + 2, "mysql_native_password");
} else {
if (passwd != NULL) {
*(packet_buffer+36 + 5 + 1) = 20;
memcpy(packet_buffer+36 + 5 + 1 + 1, client_scramble, GW_MYSQL_SCRAMBLE_SIZE);
strcpy(packet_buffer+36 + 5 + 1 + 1 + 20, dbname);
//strcpy(packet_buffer+36 + 5 + 1 + 1 + 20 + strlen(dbname) + 1, "mysql_native_password");
//bytes += 20 + strlen(dbname) + 1;
bytes += strlen(dbname) -1;
} else {
strcpy(packet_buffer+36 + 5 + 1 + 1, dbname);
//strcpy(packet_buffer+36 + 5 + 1 + 1 + strlen(dbname) + 1, "mysql_native_password");
bytes += strlen(dbname) -1;
}
}
gw_mysql_set_byte3(packet_buffer, bytes);
bytes += 4;
rv = write(so, packet_buffer, bytes);
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "Sent [%s], [%i] bytes\n", packet_buffer, bytes);
fflush(stderr);
#endif
if (rv == -1) {
fprintf(stderr, "CONNECT Error in send auth\n");
}
bytes = 4096;
memset(buffer, '\0', sizeof (buffer));
rv = read(so, buffer, 4096);
if (rv == -1) {
fprintf(stderr, "CONNCET Error in recv OK for auth\n");
}
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "ok packet\[");
fwrite(buffer, bytes, 1, stderr);
fprintf(stderr, "]\n");
fflush(stderr);
#endif
if (buffer[4] == '\x00') {
#ifdef MYSQL_CONN_DEBUG
fprintf(stderr, "OK packet received, packet # %i\n", buffer[3]);
fflush(stderr);
#endif
conn->state = MYSQL_IDLE;
return 0;
}
return 1;
}
////////////////////////////////////// //////////////////////////////////////
// close a connection if opened // close a connection if opened
// free data scructure // free data scructure

578
core/utils.c
View File

@ -55,584 +55,6 @@ char hex_lower[] = "0123456789abcdefghijklmnopqrstuvwxyz";
//backend read event triggered by EPOLLIN //backend read event triggered by EPOLLIN
////////////////////////////////////////// //////////////////////////////////////////
int gw_read_backend_event(DCB *dcb) {
int n;
MySQLProtocol *client_protocol = NULL;
if (dcb)
if(dcb->session)
client_protocol = SESSION_PROTOCOL(dcb->session, MySQLProtocol);
#ifdef GW_DEBUG_READ_EVENT
fprintf(stderr, "Backend ready! Read from Backend %i, write to client %i, client state %i\n", dcb->fd, dcb->session->client->fd, client_protocol->state);
#endif
if ((client_protocol->state == MYSQL_WAITING_RESULT) || (client_protocol->state == MYSQL_IDLE)) {
int b = -1;
GWBUF *buffer, *head;
if (ioctl(dcb->fd, FIONREAD, &b)) {
fprintf(stderr, "Backend Ioctl FIONREAD error %i, %s\n", errno , strerror(errno));
} else {
//fprintf(stderr, "Backend IOCTL FIONREAD bytes to read = %i\n", b);
}
/*
* Read all the data that is available into a chain of buffers
*/
head = NULL;
while (b > 0)
{
int bufsize = b < MAX_BUFFER_SIZE ? b : MAX_BUFFER_SIZE;
if ((buffer = gwbuf_alloc(bufsize)) == NULL)
{
/* Bad news, we have run out of memory */
return 0;
}
GW_NOINTR_CALL(n = read(dcb->fd, GWBUF_DATA(buffer), bufsize); dcb->stats.n_reads++);
if (n < 0)
{
// if eerno == EAGAIN || EWOULDBLOCK is missing
// do the right task, not just break
break;
}
head = gwbuf_append(head, buffer);
// how many bytes left
b -= n;
}
// write the gwbuffer to client
dcb->session->client->func.write(dcb->session->client, head);
return 1;
}
return 1;
}
/**
* Write function for client DCB
*
* @param dcb The DCB of the client
* @param queue Queue of buffers to write
*/
int
MySQLWrite(DCB *dcb, GWBUF *queue)
{
int w, saved_errno = 0;
spinlock_acquire(&dcb->writeqlock);
if (dcb->writeq)
{
/*
* We have some queued data, so add our data to
* the write queue and return.
* The assumption is that there will be an EPOLLOUT
* event to drain what is already queued. We are protected
* by the spinlock, which will also be acquired by the
* the routine that drains the queue data, so we should
* not have a race condition on the event.
*/
dcb->writeq = gwbuf_append(dcb->writeq, queue);
dcb->stats.n_buffered++;
}
else
{
int len;
/*
* Loop over the buffer chain that has been passed to us
* from the reading side.
* Send as much of the data in that chain as possible and
* add any balance to the write queue.
*/
while (queue != NULL)
{
len = GWBUF_LENGTH(queue);
GW_NOINTR_CALL(w = write(dcb->fd, GWBUF_DATA(queue), len); dcb->stats.n_writes++);
saved_errno = errno;
if (w < 0)
{
break;
}
/*
* Pull the number of bytes we have written from
* queue with have.
*/
queue = gwbuf_consume(queue, w);
if (w < len)
{
/* We didn't write all the data */
}
}
/* Buffer the balance of any data */
dcb->writeq = queue;
if (queue)
{
dcb->stats.n_buffered++;
}
}
spinlock_release(&dcb->writeqlock);
if (queue && (saved_errno != EAGAIN || saved_errno != EWOULDBLOCK))
{
/* We had a real write failure that we must deal with */
return 0;
}
return 1;
}
//////////////////////////////////////////
//backend write event triggered by EPOLLOUT
//////////////////////////////////////////
int gw_write_backend_event(DCB *dcb) {
//fprintf(stderr, ">>> gw_write_backend_event for %i\n", dcb->fd);
return 0;
}
//////////////////////////////////////////
//client read event triggered by EPOLLIN
//////////////////////////////////////////
int gw_route_read_event(DCB* dcb) {
MySQLProtocol *protocol = NULL;
int b = -1;
if (dcb) {
protocol = DCB_PROTOCOL(dcb, MySQLProtocol);
}
if (ioctl(dcb->fd, FIONREAD, &b)) {
fprintf(stderr, "Client Ioctl FIONREAD error %i, %s\n", errno , strerror(errno));
} else {
//fprintf(stderr, "Client IOCTL FIONREAD bytes to read = %i\n", b);
}
switch (protocol->state) {
case MYSQL_AUTH_SENT:
/*
* Read all the data that is available into a chain of buffers
*/
{
int len = -1;
int ret = -1;
GWBUF *queue = NULL;
GWBUF *gw_buffer = NULL;
int auth_val = -1;
//////////////////////////////////////////////////////
// read and handle errors & close, or return if busyA
// note: if b == 0 error handling is not triggered, just return
// without closing
//////////////////////////////////////////////////////
if ((ret = gw_read_gwbuff(dcb, &gw_buffer, b)) != 0)
return ret;
// example with consume, assuming one buffer only ...
queue = gw_buffer;
len = GWBUF_LENGTH(queue);
//fprintf(stderr, "<<< Reading from Client %i bytes: [%s]\n", len, GWBUF_DATA(queue));
auth_val = gw_mysql_do_authentication(dcb, queue);
// Data handled withot the dcb->func.write
// so consume it now
// be sure to consume it all
queue = gwbuf_consume(queue, len);
if (auth_val == 0)
protocol->state = MYSQL_AUTH_RECV;
else
protocol->state = MYSQL_AUTH_FAILED;
}
break;
case MYSQL_IDLE:
case MYSQL_WAITING_RESULT:
/*
* Read all the data that is available into a chain of buffers
*/
{
int len;
GWBUF *queue = NULL;
GWBUF *gw_buffer = NULL;
uint8_t *ptr_buff = NULL;
int mysql_command = -1;
int ret = -1;
//////////////////////////////////////////////////////
// read and handle errors & close, or return if busy
//////////////////////////////////////////////////////
if ((ret = gw_read_gwbuff(dcb, &gw_buffer, b)) != 0)
return ret;
// Now assuming in the first buffer there is the information form mysql command
// following code is only for debug now
queue = gw_buffer;
len = GWBUF_LENGTH(queue);
ptr_buff = GWBUF_DATA(queue);
// get mysql commang
if (ptr_buff)
mysql_command = ptr_buff[4];
if (mysql_command == '\x03') {
/// this is a query !!!!
//fprintf(stderr, "<<< MySQL Query from Client %i bytes: [%s]\n", len, ptr_buff+5);
//else
//fprintf(stderr, "<<< Reading from Client %i bytes: [%s]\n", len, ptr_buff);
}
///////////////////////////
// Handling the COM_QUIT
//////////////////////////
if (mysql_command == '\x01') {
fprintf(stderr, "COM_QUIT received\n");
if (dcb->session->backends) {
dcb->session->backends->func.write(dcb, queue);
(dcb->session->backends->func).error(dcb->session->backends);
}
(dcb->func).error(dcb);
return 1;
}
protocol->state = MYSQL_ROUTING;
///////////////////////////////////////
// writing in the backend buffer queue
///////////////////////////////////////
dcb->session->backends->func.write(dcb->session->backends, queue);
protocol->state = MYSQL_WAITING_RESULT;
}
break;
default:
// todo
break;
}
return 0;
}
///////////////////////////////////////////////
// client write event triggered by EPOLLOUT
//////////////////////////////////////////////
int gw_handle_write_event(DCB *dcb) {
MySQLProtocol *protocol = NULL;
if (dcb == NULL) {
fprintf(stderr, "DCB is NULL, return\n");
return 1;
}
if (dcb->state == DCB_STATE_DISCONNECTED) {
return 1;
}
if (dcb->protocol) {
protocol = DCB_PROTOCOL(dcb, MySQLProtocol);
} else {
fprintf(stderr, "DCB protocol is NULL, return\n");
return 1;
}
if (dcb->session) {
} else {
fprintf(stderr, "DCB session is NULL, return\n");
return 1;
}
if (dcb->session->backends) {
} else {
fprintf(stderr, "DCB backend is NULL, continue\n");
}
if(protocol->state == MYSQL_AUTH_RECV) {
//write to client mysql AUTH_OK packet, packet n. is 2
mysql_send_ok(dcb, 2, 0, NULL);
protocol->state = MYSQL_IDLE;
return 0;
}
if (protocol->state == MYSQL_AUTH_FAILED) {
// still to implement
mysql_send_auth_error(dcb, 2, 0, "Authorization failed");
dcb->func.error(dcb);
if (dcb->session->backends)
dcb->session->backends->func.error(dcb->session->backends);
return 0;
}
if ((protocol->state == MYSQL_IDLE) || (protocol->state == MYSQL_WAITING_RESULT)) {
int w;
int saved_errno = 0;
spinlock_acquire(&dcb->writeqlock);
if (dcb->writeq)
{
int len;
/*
* Loop over the buffer chain in the pendign writeq
* Send as much of the data in that chain as possible and
* leave any balance on the write queue.
*/
while (dcb->writeq != NULL)
{
len = GWBUF_LENGTH(dcb->writeq);
GW_NOINTR_CALL(w = write(dcb->fd, GWBUF_DATA(dcb->writeq), len););
saved_errno = errno;
if (w < 0)
{
break;
}
/*
* Pull the number of bytes we have written from
* queue with have.
*/
dcb->writeq = gwbuf_consume(dcb->writeq, w);
if (w < len)
{
/* We didn't write all the data */
}
}
}
spinlock_release(&dcb->writeqlock);
return 1;
}
return 1;
}
///
// set listener for mysql protocol
///
void MySQLListener(int epfd, char *config_bind) {
DCB *listener;
int l_so;
struct sockaddr_in serv_addr;
char *bind_address_and_port = NULL;
char *p;
char address[1024]="";
int port=0;
int one;
// this gateway, as default, will bind on port 4404 for localhost only
(config_bind != NULL) ? (bind_address_and_port = config_bind) : (bind_address_and_port = "127.0.0.1:4406");
listener = (DCB *) calloc(1, sizeof(DCB));
listener->state = DCB_STATE_ALLOC;
listener->fd = -1;
memset(&serv_addr, 0, sizeof serv_addr);
serv_addr.sin_family = AF_INET;
p = strchr(bind_address_and_port, ':');
if (p) {
strncpy(address, bind_address_and_port, sizeof(address));
address[sizeof(address)-1] = '\0';
p = strchr(address, ':');
*p = '\0';
port = atoi(p+1);
setipaddress(&serv_addr.sin_addr, address);
snprintf(address, (sizeof(address) - 1), "%s", inet_ntoa(serv_addr.sin_addr));
} else {
port = atoi(bind_address_and_port);
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
sprintf(address, "0.0.0.0");
}
serv_addr.sin_port = htons(port);
// socket create
if ((l_so = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
error("can't open listening socket");
}
// socket options
setsockopt(l_so, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
// set NONBLOCKING mode
setnonblocking(l_so);
// bind address and port
if (bind(l_so, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
fprintf(stderr, ">>>> Bind failed !!! %i, [%s]\n", errno, strerror(errno));
error("can't bind to address and port");
exit(1);
}
fprintf(stderr, ">> GATEWAY bind is: %s:%i. FD is %i\n", address, port, l_so);
listen(l_so, 10 * SOMAXCONN);
fprintf(stderr, ">> GATEWAY listen backlog queue is %i\n", 10 * SOMAXCONN);
listener->state = DCB_STATE_IDLE;
// assign l_so to dcb
listener->fd = l_so;
// add listening socket to poll structure
if (poll_add_dcb(listener) == -1) {
perror("poll_add_dcb: listen_sock");
exit(EXIT_FAILURE);
}
listener->func.accept = MySQLAccept;
listener->state = DCB_STATE_LISTENING;
}
int MySQLAccept(DCB *listener) {
fprintf(stderr, "MySQL Listener socket is: %i\n", listener->fd);
while (1) {
int c_sock;
struct sockaddr_in local;
socklen_t addrlen;
addrlen = sizeof(local);
DCB *client;
DCB *backend;
SESSION *session;
MySQLProtocol *protocol;
MySQLProtocol *ptr_proto;
int sendbuf = GW_BACKEND_SO_SNDBUF;
socklen_t optlen = sizeof(sendbuf);
// new connection from client
c_sock = accept(listener->fd, (struct sockaddr *) &local, &addrlen);
if (c_sock == -1) {
if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
fprintf(stderr, ">>>> NO MORE conns for MySQL Listener: errno is %i for %i\n", errno, listener->fd);
/* We have processed all incoming connections. */
break;
} else {
fprintf(stderr, "Accept error for %i, Err: %i, %s\n", listener->fd, errno, strerror(errno));
// what else to do?
return 1;
}
}
listener->stats.n_accepts++;
fprintf(stderr, "Processing %i connection fd %i for listener %i\n", listener->stats.n_accepts, c_sock, listener->fd);
// set nonblocking
setsockopt(c_sock, SOL_SOCKET, SO_SNDBUF, &sendbuf, optlen);
setnonblocking(c_sock);
client = (DCB *) calloc(1, sizeof(DCB));
backend = (DCB *) calloc(1, sizeof(DCB));
session = (SESSION *) calloc(1, sizeof(SESSION));
protocol = (MySQLProtocol *) calloc(1, sizeof(MySQLProtocol));
client->fd = c_sock;
client->state = DCB_STATE_ALLOC;
client->session = session;
client->protocol = (void *)protocol;
session->state = SESSION_STATE_ALLOC;
session->client = client;
session->backends = NULL;
protocol->state = MYSQL_ALLOC;
protocol->descriptor = client;
protocol->fd = c_sock;
backend->state = DCB_STATE_ALLOC;
backend->session = NULL;
backend->protocol = (MySQLProtocol *)gw_mysql_init(NULL);
ptr_proto = (MySQLProtocol *)backend->protocol;
// sha1(password) from client non yet handled
// this is blocking until auth done
if (gw_mysql_connect("127.0.0.1", 3306, "test", "massi", "massi", backend->protocol, 0) == 0) {
fprintf(stderr, "Connected to backend mysql server\n");
backend->fd = ptr_proto->fd;
setnonblocking(backend->fd);
} else {
backend->fd = -1;
}
// if connected, add it to the poll
if (backend->fd > 0) {
if (poll_add_dcb(backend) == -1) {
perror("poll_add_dcb: backend sock");
} else {
//fprintf(stderr, "--> Backend conn added, bk_fd [%i], scramble [%s], is session with client_fd [%i]\n", ptr_proto->fd, ptr_proto->scramble, client->fd);
backend->state = DCB_STATE_POLLING;
backend->session = session;
(backend->func).read = gw_read_backend_event;
(backend->func).write = MySQLWrite;
(backend->func).write_ready = gw_write_backend_event;
(backend->func).error = handle_event_errors_backend;
// assume here one backend only.
// in session.h
// struct dcb *backends;
// instead of a list **backends;
session->backends = backend;
}
}
// assign function poiters to "func" field
(client->func).error = handle_event_errors;
(client->func).read = gw_route_read_event;
(client->func).write = MySQLWrite;
(client->func).write_ready = gw_handle_write_event;
client->state = DCB_STATE_IDLE;
// event install
if (poll_add_dcb(client) == -1) {
perror("poll_add_dcb: conn_sock");
exit(EXIT_FAILURE);
} else {
//fprintf(stderr, "Added fd %i to poll, protocol state [%i]\n", c_sock , client->state);
client->state = DCB_STATE_POLLING;
}
client->state = DCB_STATE_PROCESSING;
//send handshake to the client
MySQLSendHandshake(client);
// client protocol state change
protocol->state = MYSQL_AUTH_SENT;
}
return 0;
}
int setnonblocking(int fd) { int setnonblocking(int fd) {
int fl; int fl;