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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_mysql.h>
/* the library supports the subset of the MySQL 4.1+ protocol (version 10) */
ngx_int_t
ngx_mysql_connect(ngx_mysql_t *m)
{
ngx_int_t rc;
#if 0
if (cached) {
return NGX_OK;
}
#endif
m->peer.log->action = "connecting to mysql server";
rc = ngx_event_connect_peer(&m->peer);
if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
return rc;
}
m->peer.connection->read->handler = ngx_mysql_read_server_greeting;
m->peer.connection->write->handler = ngx_mysql_emtpy_handler;
ngx_add_timer(m->peer.connection->read, /* STUB */ 5000);
ngx_add_timer(m->peer.connection->write, /* STUB */ 5000);
return NGX_OK;
}
static void
ngx_mysql_read_server_greeting(ngx_event_t *rev)
{
size_t len;
u_char *p, *t;
ngx_mysql_t *m;
ngx_connection_t *c;
c = rev->data;
m = c->data;
if (rev->timedout) {
ngx_log_error(NGX_LOG_ERR, rev->log, NGX_ETIMEDOUT,
"mysql server %V timed out",
&ctx->peer.peers->peer[0].name);
ngx_mysql_close(m, NGX_ERROR);
return;
}
if (m->buf == NULL) {
m->peer.log->action = "reading to mysql server greeting";
m->buf = ngx_create_temp(m->pool, /* STUB */ 1024);
if (m->buf == NULL) {
ngx_mysql_close(m, NGX_ERROR);
return;
}
}
n = ngx_recv(m->peer.connection, m->buf->pos, /* STUB */ 1024);
if (n == NGX_AGAIN) {
return;
}
if (n < 5) {
ngx_mysql_close(m, NGX_ERROR);
return;
}
p = m->buf->pos;
if (ngx_m24toh(p) > n - 4) {
ngx_log_error(NGX_LOG_ERR, rev->log, 0,
"mysql server %V sent incomplete greeting packet",
&ctx->peer.peers->peer[0].name);
ngx_mysql_close(m, NGX_ERROR);
return;
}
if (p[4]) < 10) {
ngx_log_error(NGX_LOG_ERR, rev->log, 0,
"mysql server %V sent unsupported protocol version %ud",
&ctx->peer.peers->peer[0].name, p[4]);
ngx_mysql_close(m, NGX_ERROR);
return;
}
len = ngx_strlen(&p[5]);
t = p + 5 + len + 1;
capacity = ngx_m16toh((&t[4 + 9]));
ngx_log_debug8(NGX_LOG_DEBUG_MYSQL, rev->log, 0,
"mysql version: %ud, \"%s\", thread: %ud, salt: \"%s\", ",
"capacity: %Xd, charset: %ud, status: %ud, salt rest \"%s\"",
p[4], &p[5], ngx_m32toh(t), &t[4],
capacity, t[4 + 9 + 2],
ngx_m16toh((&t[4 + 9 + 2 + 1])),
t[4 + 9 + 2 + 1 + 2 + 13]);
capacity &= NGX_MYSQL_LONG_PASSWORD
| NGX_MYSQL_CONNECT_WITH_DB
| NGX_MYSQL_PROTOCOL_41;
}
static void
ngx_mysql_close(ngx_mysql_t *m, ngx_int_t rc)
{
if (rc == NGX_ERROR) {
ngx_close_connection(m->peer.connection);
}
m->state = rc;
m->handler(m);
}
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