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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 <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <sys/poll.h>
#include <stdio.h>
#include <stdlib.h>
#include "log.h"
static int fd = -1;
int ctl_client_init(void)
{
struct sockaddr_un sa_svr;
int s;
TST(strlen(RSTP_SERVER_SOCK_NAME) < sizeof(sa_svr.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_svr, RSTP_SERVER_SOCK_NAME);
struct sockaddr_un sa;
char tmpname[64];
sprintf(tmpname, "RSTPCTL_%d", getpid());
set_socket_address(&sa, tmpname);
/* We need this bind. The autobind on connect isn't working properly.
The server doesn't get a proper sockaddr in recvmsg if we don't do this.
*/
if (bind(s, (struct sockaddr *)&sa, sizeof(sa)) != 0) {
ERROR("Couldn't bind socket: %m");
close(s);
return -1;
}
if (connect(s, (struct sockaddr *)&sa_svr, sizeof(sa_svr)) != 0) {
ERROR("Couldn't connect to server");
close(s);
return -1;
}
fd = s;
return 0;
}
void ctl_client_cleanup(void)
{
if (fd >= 0) {
close(fd);
fd = -1;
}
}
int send_ctl_message(int cmd, void *inbuf, int lin, void *outbuf, int *lout,
int *res)
{
struct ctl_msg_hdr mhdr;
struct msghdr msg;
struct iovec iov[2];
int l;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 2;
msg.msg_control = NULL;
msg.msg_controllen = 0;
mhdr.cmd = cmd;
mhdr.lin = lin;
mhdr.lout = lout != NULL ? *lout : 0;
iov[0].iov_base = &mhdr;
iov[0].iov_len = sizeof(mhdr);
iov[1].iov_base = (void *)inbuf;
iov[1].iov_len = lin;
l = sendmsg(fd, &msg, 0);
if (l < 0) {
ERROR("Error sending message to server: %m");
return -1;
}
if (l != sizeof(mhdr) + lin) {
ERROR("Error sending message to server: Partial write");
return -1;
}
iov[1].iov_base = outbuf;
iov[1].iov_len = lout != NULL ? *lout : 0;
{
struct pollfd pfd;
int timeout = 5000; /* 5 s */
int r;
pfd.fd = fd;
pfd.events = POLLIN;
do {
r = poll(&pfd, 1, timeout);
if (r == 0) {
ERROR
("Error getting message from server: Timeout");
return -1;
}
if (r < 0) {
ERROR
("Error getting message from server: poll error: %m");
return -1;
}
} while ((pfd.
revents & (POLLERR | POLLHUP | POLLNVAL | POLLIN)) ==
0);
l = recvmsg(fd, &msg, 0);
if (l < 0) {
ERROR("Error getting message from server: %m");
return -1;
}
if (l < sizeof(mhdr) || l != sizeof(mhdr) + mhdr.lout
|| mhdr.cmd != cmd) {
ERROR("Error getting message from server: Bad format");
return -1;
}
}
if (lout)
*lout = mhdr.lout;
if (res)
*res = mhdr.res;
return 0;
}
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