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/*****************************************************************************
Copyright (c) 2006 EMC Corporation.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program 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 General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Authors: Srinivas Aji <Aji_Srinivas@emc.com>
******************************************************************************/
#include "ctl_socket.h"
#include "ctl_socket_server.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include "epoll_loop.h"
#include "log.h"
int server_socket(void)
{
struct sockaddr_un sa;
int s;
TST(strlen(RSTP_SERVER_SOCK_NAME) < sizeof(sa.sun_path), -1);
s = socket(PF_UNIX, SOCK_DGRAM, 0);
if (s < 0) {
ERROR("Couldn't open unix socket: %m");
return -1;
}
set_socket_address(&sa, RSTP_SERVER_SOCK_NAME);
if (bind(s, (struct sockaddr *)&sa, sizeof(sa)) != 0) {
ERROR("Couldn't bind socket: %m");
close(s);
return -1;
}
return s;
}
int handle_message(int cmd, void *inbuf, int lin, void *outbuf, int *lout)
{
switch (cmd) {
SERVER_MESSAGE_CASE(enable_bridge_rstp);
SERVER_MESSAGE_CASE(get_bridge_state);
SERVER_MESSAGE_CASE(set_bridge_config);
SERVER_MESSAGE_CASE(get_port_state);
SERVER_MESSAGE_CASE(set_port_config);
SERVER_MESSAGE_CASE(set_debug_level);
default:
ERROR("CTL: Unknown command %d", cmd);
return -1;
}
}
#define msg_buf_len 1024
unsigned char msg_inbuf[1024];
unsigned char msg_outbuf[1024];
void ctl_rcv_handler(uint32_t events, struct epoll_event_handler *p)
{
struct ctl_msg_hdr mhdr;
struct msghdr msg;
struct sockaddr_un sa;
struct iovec iov[2];
int l;
msg.msg_name = &sa;
msg.msg_namelen = sizeof(sa);
msg.msg_iov = iov;
msg.msg_iovlen = 2;
msg.msg_control = NULL;
msg.msg_controllen = 0;
iov[0].iov_base = &mhdr;
iov[0].iov_len = sizeof(mhdr);
iov[1].iov_base = msg_inbuf;
iov[1].iov_len = msg_buf_len;
l = recvmsg(p->fd, &msg, MSG_NOSIGNAL | MSG_DONTWAIT);
TST(l > 0,);
if (msg.msg_flags != 0 || l < sizeof(mhdr) ||
l != sizeof(mhdr) + mhdr.lin ||
mhdr.lout > msg_buf_len || mhdr.cmd < 0) {
ERROR("CTL: Unexpected message. Ignoring");
return;
}
if (mhdr.lout)
mhdr.res = handle_message(mhdr.cmd, msg_inbuf, mhdr.lin,
msg_outbuf, &mhdr.lout);
else
mhdr.res = handle_message(mhdr.cmd, msg_inbuf, mhdr.lin,
NULL, NULL);
if (mhdr.res < 0)
mhdr.lout = 0;
iov[1].iov_base = msg_outbuf;
iov[1].iov_len = mhdr.lout;
l = sendmsg(p->fd, &msg, MSG_NOSIGNAL);
if (l < 0)
ERROR("CTL: Couldn't send response: %m");
else if (l != sizeof(mhdr) + mhdr.lout) {
ERROR
("CTL: Couldn't send full response, sent %d bytes instead of %zd.",
l, sizeof(mhdr) + mhdr.lout);
}
}
struct epoll_event_handler ctl_handler;
int ctl_socket_init(void)
{
int s = server_socket();
if (s < 0)
return -1;
ctl_handler.fd = s;
ctl_handler.handler = ctl_rcv_handler;
TST(add_epoll(&ctl_handler) == 0, -1);
return 0;
}
void ctl_socket_cleanup(void)
{
remove_epoll(&ctl_handler);
close(ctl_handler.fd);
}
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