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1 | /***************************************************************************** |
2 | Copyright (c) 2006 EMC Corporation. | |
3 | Copyright (c) 2011 Factor-SPE | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify it | |
6 | under the terms of the GNU General Public License as published by the Free | |
7 | Software Foundation; either version 2 of the License, or (at your option) | |
8 | any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License along with | |
16 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
17 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in the | |
20 | file called LICENSE. | |
21 | ||
22 | Authors: Srinivas Aji <Aji_Srinivas@emc.com> | |
23 | Authors: Vitalii Demianets <vitas@nppfactor.kiev.ua> | |
24 | ||
25 | ******************************************************************************/ | |
26 | ||
27 | #include <sys/un.h> | |
28 | #include <unistd.h> | |
29 | ||
30 | #include "ctl_socket_client.h" | |
31 | #include "epoll_loop.h" | |
32 | #include "log.h" | |
33 | ||
34 | static int server_socket(void) | |
35 | { | |
36 | struct sockaddr_un sa; | |
37 | int s; | |
38 | ||
39 | TST(strlen(MSTP_SERVER_SOCK_NAME) < sizeof(sa.sun_path), -1); | |
40 | ||
41 | if(0 > (s = socket(PF_UNIX, SOCK_DGRAM, 0))) | |
42 | { | |
43 | ERROR("Couldn't open unix socket: %m"); | |
44 | return -1; | |
45 | } | |
46 | ||
47 | set_socket_address(&sa, MSTP_SERVER_SOCK_NAME); | |
48 | ||
49 | if(0 != bind(s, (struct sockaddr *)&sa, sizeof(sa))) | |
50 | { | |
51 | ERROR("Couldn't bind socket: %m"); | |
52 | close(s); | |
53 | return -1; | |
54 | } | |
55 | ||
56 | return s; | |
57 | } | |
58 | ||
59 | static int handle_message(int cmd, void *inbuf, int lin, | |
60 | void *outbuf, int lout) | |
61 | { | |
62 | switch(cmd) | |
63 | { | |
64 | SERVER_MESSAGE_CASE(get_cist_bridge_status); | |
65 | SERVER_MESSAGE_CASE(get_msti_bridge_status); | |
66 | SERVER_MESSAGE_CASE(set_cist_bridge_config); | |
67 | SERVER_MESSAGE_CASE(set_msti_bridge_config); | |
68 | SERVER_MESSAGE_CASE(get_cist_port_status); | |
69 | SERVER_MESSAGE_CASE(get_msti_port_status); | |
70 | SERVER_MESSAGE_CASE(set_cist_port_config); | |
71 | SERVER_MESSAGE_CASE(set_msti_port_config); | |
72 | SERVER_MESSAGE_CASE(port_mcheck); | |
73 | SERVER_MESSAGE_CASE(set_debug_level); | |
74 | SERVER_MESSAGE_CASE(get_mstilist); | |
75 | SERVER_MESSAGE_CASE(create_msti); | |
76 | SERVER_MESSAGE_CASE(delete_msti); | |
77 | SERVER_MESSAGE_CASE(get_mstconfid); | |
78 | SERVER_MESSAGE_CASE(set_mstconfid); | |
79 | SERVER_MESSAGE_CASE(get_vids2fids); | |
80 | SERVER_MESSAGE_CASE(get_fids2mstids); | |
81 | SERVER_MESSAGE_CASE(set_vid2fid); | |
82 | SERVER_MESSAGE_CASE(set_fid2mstid); | |
83 | SERVER_MESSAGE_CASE(set_vids2fids); | |
84 | SERVER_MESSAGE_CASE(set_fids2mstids); | |
85 | ||
86 | default: | |
87 | ERROR("CTL: Unknown command %d", cmd); | |
88 | return -1; | |
89 | } | |
90 | } | |
91 | ||
92 | int ctl_in_handler = 0; | |
93 | static unsigned char msg_logbuf[LOG_STRING_LEN]; | |
94 | static unsigned int msg_log_offset; | |
95 | void _ctl_err_log(char *fmt, ...) | |
96 | { | |
97 | if((sizeof(msg_logbuf) - 1) <= msg_log_offset) | |
98 | return; | |
99 | int r; | |
100 | va_list ap; | |
101 | va_start(ap, fmt); | |
102 | r = vsnprintf((char *)msg_logbuf + msg_log_offset, | |
103 | sizeof(msg_logbuf) - msg_log_offset, | |
104 | fmt, ap); | |
105 | va_end(ap); | |
106 | msg_log_offset += r; | |
107 | if(sizeof(msg_logbuf) <= msg_log_offset) | |
108 | { | |
109 | msg_log_offset = sizeof(msg_logbuf) - 1; | |
110 | msg_logbuf[sizeof(msg_logbuf) - 1] = 0; | |
111 | } | |
112 | } | |
113 | ||
114 | #define MSG_BUF_LEN 10000 | |
115 | static unsigned char msg_inbuf[MSG_BUF_LEN]; | |
116 | static unsigned char msg_outbuf[MSG_BUF_LEN]; | |
117 | ||
118 | static void ctl_rcv_handler(uint32_t events, struct epoll_event_handler *p) | |
119 | { | |
120 | struct ctl_msg_hdr mhdr; | |
121 | struct msghdr msg; | |
122 | struct sockaddr_un sa; | |
123 | struct iovec iov[3]; | |
124 | int l; | |
125 | ||
126 | msg.msg_name = &sa; | |
127 | msg.msg_namelen = sizeof(sa); | |
128 | msg.msg_iov = iov; | |
129 | msg.msg_iovlen = 3; | |
130 | msg.msg_control = NULL; | |
131 | msg.msg_controllen = 0; | |
132 | iov[0].iov_base = &mhdr; | |
133 | iov[0].iov_len = sizeof(mhdr); | |
134 | iov[1].iov_base = msg_inbuf; | |
135 | iov[1].iov_len = MSG_BUF_LEN; | |
136 | iov[2].iov_base = NULL; | |
137 | iov[2].iov_len = 0; | |
138 | l = recvmsg(p->fd, &msg, MSG_NOSIGNAL | MSG_DONTWAIT); | |
139 | TST(l > 0,); | |
140 | if((0 != msg.msg_flags) || (sizeof(mhdr) > l) | |
141 | || (l != sizeof(mhdr) + mhdr.lin) | |
142 | || (MSG_BUF_LEN < mhdr.lout) | |
143 | || (0 > mhdr.cmd) | |
144 | ) | |
145 | { | |
146 | ERROR("CTL: Unexpected message. Ignoring"); | |
147 | return; | |
148 | } | |
149 | ||
150 | msg_log_offset = 0; | |
151 | ctl_in_handler = 1; | |
152 | ||
153 | mhdr.res = handle_message(mhdr.cmd, msg_inbuf, mhdr.lin, | |
154 | msg_outbuf, mhdr.lout); | |
155 | ||
156 | ctl_in_handler = 0; | |
157 | if(0 > mhdr.res) | |
158 | memset(msg_outbuf, 0, mhdr.lout); | |
159 | if(msg_log_offset < mhdr.llog) | |
160 | mhdr.llog = msg_log_offset; | |
161 | ||
162 | iov[1].iov_base = msg_outbuf; | |
163 | iov[1].iov_len = mhdr.lout; | |
164 | iov[2].iov_base = msg_logbuf; | |
165 | iov[2].iov_len = mhdr.llog; | |
166 | l = sendmsg(p->fd, &msg, MSG_NOSIGNAL); | |
167 | if(0 > l) | |
168 | ERROR("CTL: Couldn't send response: %m"); | |
169 | else if(l != sizeof(mhdr) + mhdr.lout + mhdr.llog) | |
170 | { | |
171 | ERROR | |
172 | ("CTL: Couldn't send full response, sent %d bytes instead of %zd.", | |
173 | l, sizeof(mhdr) + mhdr.lout + mhdr.llog); | |
174 | } | |
175 | } | |
176 | ||
177 | static struct epoll_event_handler ctl_handler = {0}; | |
178 | ||
179 | int ctl_socket_init(void) | |
180 | { | |
181 | int s = server_socket(); | |
182 | if(0 > s) | |
183 | return -1; | |
184 | ||
185 | ctl_handler.fd = s; | |
186 | ctl_handler.handler = ctl_rcv_handler; | |
187 | ||
188 | TST(add_epoll(&ctl_handler) == 0, -1); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | void ctl_socket_cleanup(void) | |
193 | { | |
194 | remove_epoll(&ctl_handler); | |
195 | close(ctl_handler.fd); | |
196 | } |