34fdbdb34d
Addition of stop and restart service Fix for telnetd in Makefile Fix for printing the server names in services
276 lines
7.0 KiB
C
276 lines
7.0 KiB
C
/*
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* This file is distributed as part of the SkySQL Gateway. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright SkySQL Ab 2013
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*
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*/
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/**
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* @file gateway.c - The gateway entry point.
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 23-05-2013 Massimiliano Pinto epoll loop test
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* 12-06-2013 Mark Riddoch Add the -p option to set the
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* listening port
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* and bind addr is 0.0.0.0
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* 19/06/13 Mark Riddoch Extract the epoll functionality
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* 21/06/13 Mark Riddoch Added initial config support
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*
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* @endverbatim
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*/
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#include <gw.h>
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#include <unistd.h>
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#include <service.h>
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#include <server.h>
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#include <dcb.h>
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#include <session.h>
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#include <modules.h>
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#include <config.h>
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#include <poll.h>
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/* basic signal handling */
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static void sighup_handler (int i) {
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fprintf(stderr, "Signal SIGHUP %i received ...\n", i);
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}
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static void sigterm_handler (int i) {
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extern void shutdown_gateway();
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fprintf(stderr, "Signal SIGTERM %i received ...Exiting!\n", i);
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shutdown_gateway();
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}
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/* wrapper for sigaction */
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static void signal_set (int sig, void (*handler)(int)) {
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static struct sigaction sigact;
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static int err;
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memset(&sigact, 0, sizeof(struct sigaction));
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sigact.sa_handler = handler;
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GW_NOINTR_CALL(err = sigaction(sig, &sigact, NULL));
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if (err < 0) {
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fprintf(stderr,"sigaction() error %s\n", strerror(errno));
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exit(1);
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}
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}
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int handle_event_errors(DCB *dcb) {
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fprintf(stderr, "#### Handle error function for [%i] is [%s]\n", dcb->state, gw_dcb_state2string(dcb->state));
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if (dcb->state == DCB_STATE_DISCONNECTED) {
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fprintf(stderr, "#### Handle error function, session is %p\n", dcb->session);
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return 1;
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}
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#ifdef GW_EVENT_DEBUG
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if (event != -1) {
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fprintf(stderr, ">>>>>> DCB state %i, Protocol State %i: event %i, %i\n", dcb->state, protocol->state, event & EPOLLERR, event & EPOLLHUP);
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if(event & EPOLLHUP)
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fprintf(stderr, "EPOLLHUP\n");
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if(event & EPOLLERR)
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fprintf(stderr, "EPOLLERR\n");
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if(event & EPOLLPRI)
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fprintf(stderr, "EPOLLPRI\n");
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}
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#endif
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if (dcb->state != DCB_STATE_LISTENING) {
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if (poll_remove_dcb(dcb) == -1) {
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fprintf(stderr, "poll_remove_dcb: from events check failed to delete %i, [%i]:[%s]\n", dcb->fd, errno, strerror(errno));
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}
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#ifdef GW_EVENT_DEBUG
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fprintf(stderr, "closing fd [%i]=[%i], from events\n", dcb->fd, protocol->fd);
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#endif
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if (dcb->fd) {
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//fprintf(stderr, "Client protocol dcb->protocol %p\n", dcb->protocol);
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gw_mysql_close((MySQLProtocol **)&dcb->protocol);
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fprintf(stderr, "Client protocol dcb->protocol %p\n", dcb->protocol);
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dcb->state = DCB_STATE_DISCONNECTED;
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/*
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if (dcb->session->backends->protocol != NULL) {
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fprintf(stderr, "!!!!!! Backend still open! dcb %p\n", dcb->session->backends->protocol);
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gw_mysql_close((MySQLProtocol **)&dcb->session->backends->protocol);
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}
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*/
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}
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}
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fprintf(stderr, "Return from error handling, dcb is %p\n", dcb);
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//free(dcb->session);
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dcb->state = DCB_STATE_FREED;
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fprintf(stderr, "#### Handle error function RETURN for [%i] is [%s]\n", dcb->state, gw_dcb_state2string(dcb->state));
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//free(dcb);
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return 1;
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}
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int handle_event_errors_backend(DCB *dcb) {
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fprintf(stderr, "#### Handle Backend error function for %i\n", dcb->fd);
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#ifdef GW_EVENT_DEBUG
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if (event != -1) {
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fprintf(stderr, ">>>>>> Backend DCB state %i, Protocol State %i: event %i, %i\n", dcb->state, dcb->proto_state, event & EPOLLERR, event & EPOLLHUP);
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if(event & EPOLLHUP)
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fprintf(stderr, "EPOLLHUP\n");
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if(event & EPOLLERR)
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fprintf(stderr, "EPOLLERR\n");
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if(event & EPOLLPRI)
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fprintf(stderr, "EPOLLPRI\n");
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}
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#endif
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if (dcb->state != DCB_STATE_LISTENING) {
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if (poll_remove_dcb(dcb) == -1) {
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fprintf(stderr, "Backend poll_remove_dcb: from events check failed to delete %i, [%i]:[%s]\n", dcb->fd, errno, strerror(errno));
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}
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#ifdef GW_EVENT_DEBUG
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fprintf(stderr, "Backend closing fd [%i]=%i, from events check\n", dcb->fd, protocol->fd);
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#endif
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if (dcb->fd) {
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dcb->state = DCB_STATE_DISCONNECTED;
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fprintf(stderr, "Freeing backend MySQL conn %p, %p\n", dcb->protocol, &dcb->protocol);
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gw_mysql_close((MySQLProtocol **)&dcb->protocol);
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fprintf(stderr, "Freeing backend MySQL conn %p, %p\n", dcb->protocol, &dcb->protocol);
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}
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}
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return 0;
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}
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// main function
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int
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main(int argc, char **argv)
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{
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int daemon_mode = 1;
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sigset_t sigset;
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int n, n_threads;
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void **threads;
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char buf[1024], *home, *cnf_file = NULL;
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if ((home = getenv("GATEWAY_HOME")) != NULL)
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{
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sprintf(buf, "%s/etc/gateway.cnf", home);
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if (access(buf, R_OK) == 0)
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cnf_file = buf;
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}
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if (cnf_file == NULL && access("/etc/gateway.cnf", R_OK) == 0)
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cnf_file = "/etc/gateway.cnf";
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for (n = 0; n < argc; n++)
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{
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if (strcmp(argv[n], "-d") == 0)
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{
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// Debug mode
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daemon_mode = 0;
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}
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if (strncmp(argv[n], "-c", 2) == 0)
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{
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cnf_file = &argv[n][2];
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}
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}
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if (cnf_file == NULL)
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{
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fprintf(stderr, "Unable to find a gateway configuration file, either install one in\n");
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fprintf(stderr, "/etc/gateway.cnf, $GATEWAY_HOME/etc/gateway.cnf or use the -c option.\n");
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exit(1);
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}
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if (!config_load(cnf_file))
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{
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fprintf(stderr, "Failed to load gateway configuration file %s\n", cnf_file);
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exit(1);
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}
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fprintf(stderr, "SkySQL Gateway (C) SkySQL Ab 2013\n");
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if (daemon_mode == 1)
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{
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if (sigfillset(&sigset) != 0) {
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fprintf(stderr, "sigfillset() error %s\n", strerror(errno));
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return 1;
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}
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if (sigdelset(&sigset, SIGHUP) != 0) {
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fprintf(stderr, "sigdelset(SIGHUP) error %s\n", strerror(errno));
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}
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if (sigdelset(&sigset, SIGTERM) != 0) {
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fprintf(stderr, "sigdelset(SIGTERM) error %s\n", strerror(errno));
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}
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if (sigprocmask(SIG_SETMASK, &sigset, NULL) != 0) {
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fprintf(stderr, "sigprocmask() error %s\n", strerror(errno));
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}
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signal_set(SIGHUP, sighup_handler);
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signal_set(SIGTERM, sigterm_handler);
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gw_daemonize();
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}
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fprintf(stderr, "GATEWAY is starting, PID %i\n\n", getpid());
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poll_init();
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/*
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* Start the services that were created above
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*/
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printf("Started %d services\n", serviceStartAll());
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/*
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* Start the polling threads, note this is one less than is configured as the
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* main thread will also poll.
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*/
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n_threads = config_threadcount();
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threads = (void **)calloc(n_threads, sizeof(void *));
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for (n = 0; n < n_threads - 1; n++)
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threads[n] = thread_start(poll_waitevents);
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poll_waitevents();
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for (n = 0; n < n_threads - 1; n++)
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thread_wait(threads[n]);
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printf("Gateway shutdown\n");
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return 0;
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} // End of main
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/**
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* Shutdown the gateway
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*/
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void
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shutdown_gateway()
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{
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poll_shutdown();
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}
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