| /***************************************************************************** |
| 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; |
| } |