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1 | /***************************************************************************** |
2 | Copyright (c) 2006 EMC Corporation. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU General Public License as published by the Free | |
6 | Software Foundation; either version 2 of the License, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License along with | |
15 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | ||
18 | The full GNU General Public License is included in this distribution in the | |
19 | file called LICENSE. | |
20 | ||
21 | Authors: Srinivas Aji <Aji_Srinivas@emc.com> | |
22 | ||
23 | ******************************************************************************/ | |
24 | ||
25 | #include "ctl_socket.h" | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/socket.h> | |
29 | #include <sys/un.h> | |
30 | #include <unistd.h> | |
31 | #include <sys/poll.h> | |
32 | #include <stdio.h> | |
33 | #include <stdlib.h> | |
34 | ||
b600a2c3 | 35 | #define NO_DAEMON |
ad02a0eb SH |
36 | #include "log.h" |
37 | ||
38 | static int fd = -1; | |
39 | ||
40 | int ctl_client_init(void) | |
41 | { | |
11904a35 SH |
42 | struct sockaddr_un sa_svr; |
43 | int s; | |
44 | TST(strlen(RSTP_SERVER_SOCK_NAME) < sizeof(sa_svr.sun_path), -1); | |
45 | ||
46 | s = socket(PF_UNIX, SOCK_DGRAM, 0); | |
47 | if (s < 0) { | |
48 | ERROR("Couldn't open unix socket: %m"); | |
49 | return -1; | |
50 | } | |
51 | ||
52 | set_socket_address(&sa_svr, RSTP_SERVER_SOCK_NAME); | |
53 | ||
54 | struct sockaddr_un sa; | |
55 | char tmpname[64]; | |
56 | sprintf(tmpname, "RSTPCTL_%d", getpid()); | |
57 | set_socket_address(&sa, tmpname); | |
58 | /* We need this bind. The autobind on connect isn't working properly. | |
59 | The server doesn't get a proper sockaddr in recvmsg if we don't do this. | |
60 | */ | |
61 | if (bind(s, (struct sockaddr *)&sa, sizeof(sa)) != 0) { | |
62 | ERROR("Couldn't bind socket: %m"); | |
63 | close(s); | |
64 | return -1; | |
65 | } | |
66 | ||
67 | if (connect(s, (struct sockaddr *)&sa_svr, sizeof(sa_svr)) != 0) { | |
68 | ERROR("Couldn't connect to server"); | |
69 | close(s); | |
70 | return -1; | |
71 | } | |
72 | fd = s; | |
73 | ||
74 | return 0; | |
ad02a0eb SH |
75 | } |
76 | ||
77 | void ctl_client_cleanup(void) | |
78 | { | |
11904a35 SH |
79 | if (fd >= 0) { |
80 | close(fd); | |
81 | fd = -1; | |
82 | } | |
ad02a0eb SH |
83 | } |
84 | ||
b600a2c3 SA |
85 | int send_ctl_message(int cmd, void *inbuf, int lin, void *outbuf, int lout, |
86 | LogString *log, int *res) | |
ad02a0eb | 87 | { |
11904a35 SH |
88 | struct ctl_msg_hdr mhdr; |
89 | struct msghdr msg; | |
b600a2c3 | 90 | struct iovec iov[3]; |
11904a35 SH |
91 | int l; |
92 | ||
93 | msg.msg_name = NULL; | |
94 | msg.msg_namelen = 0; | |
95 | msg.msg_iov = iov; | |
b600a2c3 | 96 | msg.msg_iovlen = 3; |
11904a35 SH |
97 | msg.msg_control = NULL; |
98 | msg.msg_controllen = 0; | |
99 | ||
100 | mhdr.cmd = cmd; | |
101 | mhdr.lin = lin; | |
b600a2c3 SA |
102 | mhdr.lout = lout; |
103 | mhdr.llog = sizeof(log->buf) - 1; | |
11904a35 SH |
104 | iov[0].iov_base = &mhdr; |
105 | iov[0].iov_len = sizeof(mhdr); | |
106 | iov[1].iov_base = (void *)inbuf; | |
107 | iov[1].iov_len = lin; | |
b600a2c3 SA |
108 | iov[2].iov_base = log->buf; |
109 | iov[2].iov_len = 0; | |
11904a35 SH |
110 | |
111 | l = sendmsg(fd, &msg, 0); | |
112 | if (l < 0) { | |
113 | ERROR("Error sending message to server: %m"); | |
114 | return -1; | |
115 | } | |
116 | if (l != sizeof(mhdr) + lin) { | |
117 | ERROR("Error sending message to server: Partial write"); | |
118 | return -1; | |
119 | } | |
120 | ||
121 | iov[1].iov_base = outbuf; | |
b600a2c3 SA |
122 | iov[1].iov_len = lout; |
123 | ||
124 | iov[2].iov_base = log->buf; | |
125 | iov[2].iov_len = sizeof(log->buf); | |
11904a35 SH |
126 | |
127 | { | |
128 | struct pollfd pfd; | |
129 | int timeout = 5000; /* 5 s */ | |
130 | int r; | |
131 | ||
132 | pfd.fd = fd; | |
133 | pfd.events = POLLIN; | |
134 | do { | |
135 | r = poll(&pfd, 1, timeout); | |
136 | if (r == 0) { | |
137 | ERROR | |
138 | ("Error getting message from server: Timeout"); | |
139 | return -1; | |
140 | } | |
141 | if (r < 0) { | |
142 | ERROR | |
143 | ("Error getting message from server: poll error: %m"); | |
144 | return -1; | |
145 | } | |
146 | } while ((pfd. | |
147 | revents & (POLLERR | POLLHUP | POLLNVAL | POLLIN)) == | |
148 | 0); | |
149 | ||
150 | l = recvmsg(fd, &msg, 0); | |
151 | if (l < 0) { | |
152 | ERROR("Error getting message from server: %m"); | |
153 | return -1; | |
154 | } | |
b600a2c3 SA |
155 | if (l < sizeof(mhdr) |
156 | || l != sizeof(mhdr) + mhdr.lout + mhdr.llog | |
11904a35 SH |
157 | || mhdr.cmd != cmd) { |
158 | ERROR("Error getting message from server: Bad format"); | |
159 | return -1; | |
160 | } | |
b600a2c3 SA |
161 | if (mhdr.lout != lout) { |
162 | ERROR("Error, unexpected result length %d, " | |
163 | "expected %d\n", mhdr.lout, lout); | |
164 | return -1; | |
165 | } | |
166 | if (mhdr.llog >= sizeof(log->buf)) { | |
167 | ERROR("Invalid log message length %d", mhdr.llog); | |
168 | return -1; | |
169 | } | |
11904a35 | 170 | } |
11904a35 SH |
171 | if (res) |
172 | *res = mhdr.res; | |
b600a2c3 | 173 | log->buf[mhdr.llog] = 0; |
11904a35 | 174 | return 0; |
ad02a0eb | 175 | } |