Commit | Line | Data |
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0c3a8cd0 | 1 | /* |
d30cab67 | 2 | * Copyright (c) 2011-2014 The DragonFly Project. All rights reserved. |
0c3a8cd0 MD |
3 | * |
4 | * This code is derived from software contributed to The DragonFly Project | |
5 | * by Matthew Dillon <dillon@dragonflybsd.org> | |
6 | * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * 3. Neither the name of The DragonFly Project nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific, prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
23 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
25 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
26 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
27 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
28 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
29 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |
30 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
31 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
32 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
33 | * SUCH DAMAGE. | |
34 | */ | |
35 | ||
36 | #include "dmsg_local.h" | |
37 | ||
0d20ec8a | 38 | static void master_auth_signal(dmsg_iocom_t *iocom); |
0c3a8cd0 | 39 | static void master_auth_rxmsg(dmsg_msg_t *msg); |
0d20ec8a | 40 | static void master_link_signal(dmsg_iocom_t *iocom); |
0c3a8cd0 MD |
41 | static void master_link_rxmsg(dmsg_msg_t *msg); |
42 | ||
43 | /* | |
44 | * Service an accepted connection (runs as a pthread) | |
45 | * | |
46 | * (also called from a couple of other places) | |
47 | */ | |
48 | void * | |
49 | dmsg_master_service(void *data) | |
50 | { | |
51 | dmsg_master_service_info_t *info = data; | |
52 | dmsg_iocom_t iocom; | |
53 | ||
54 | if (info->detachme) | |
55 | pthread_detach(pthread_self()); | |
56 | ||
2892d211 MD |
57 | dmsg_iocom_init(&iocom, |
58 | info->fd, | |
59 | (info->altmsg_callback ? info->altfd : -1), | |
60 | master_auth_signal, | |
61 | master_auth_rxmsg, | |
01e43224 | 62 | info->usrmsg_callback, |
2892d211 | 63 | info->altmsg_callback); |
98126869 MD |
64 | if (info->noclosealt) |
65 | iocom.flags &= ~DMSG_IOCOMF_CLOSEALT; | |
f306de83 MD |
66 | if (info->label) { |
67 | dmsg_iocom_label(&iocom, "%s", info->label); | |
68 | free(info->label); | |
69 | info->label = NULL; | |
70 | } | |
0c3a8cd0 | 71 | dmsg_iocom_core(&iocom); |
2892d211 | 72 | dmsg_iocom_done(&iocom); |
0c3a8cd0 | 73 | |
5ab1caed MD |
74 | dmio_printf(iocom, 1, |
75 | "iocom on fd %d terminated error rx=%d, tx=%d\n", | |
76 | info->fd, iocom.ioq_rx.error, iocom.ioq_tx.error); | |
0c3a8cd0 MD |
77 | close(info->fd); |
78 | info->fd = -1; /* safety */ | |
185ace93 MD |
79 | if (info->exit_callback) |
80 | info->exit_callback(info->handle); | |
0c3a8cd0 MD |
81 | free(info); |
82 | ||
83 | return (NULL); | |
84 | } | |
85 | ||
86 | /************************************************************************ | |
87 | * AUTHENTICATION * | |
88 | ************************************************************************ | |
89 | * | |
90 | * Callback via dmsg_iocom_core(). | |
91 | * | |
92 | * Additional messaging-based authentication must occur before normal | |
93 | * message operation. The connection has already been encrypted at | |
94 | * this point. | |
95 | */ | |
96 | static void master_auth_conn_rx(dmsg_msg_t *msg); | |
97 | ||
98 | static | |
99 | void | |
0d20ec8a | 100 | master_auth_signal(dmsg_iocom_t *iocom) |
0c3a8cd0 MD |
101 | { |
102 | dmsg_msg_t *msg; | |
103 | ||
104 | /* | |
105 | * Transmit LNK_CONN, enabling the SPAN protocol if both sides | |
106 | * agree. | |
107 | * | |
108 | * XXX put additional authentication states here? | |
109 | */ | |
1b8eded1 | 110 | msg = dmsg_msg_alloc(&iocom->state0, 0, |
0d20ec8a | 111 | DMSG_LNK_CONN | DMSGF_CREATE, |
0c3a8cd0 MD |
112 | master_auth_conn_rx, NULL); |
113 | msg->any.lnk_conn.peer_mask = (uint64_t)-1; | |
7750fd72 MD |
114 | msg->any.lnk_conn.peer_type = DMSG_PEER_ROUTER; |
115 | msg->any.lnk_conn.peer_mask = (uint64_t)-1; | |
0c3a8cd0 MD |
116 | |
117 | dmsg_msg_write(msg); | |
118 | ||
01e43224 | 119 | dmsg_iocom_restate(iocom, master_link_signal, master_link_rxmsg); |
0c3a8cd0 MD |
120 | } |
121 | ||
122 | static | |
123 | void | |
124 | master_auth_conn_rx(dmsg_msg_t *msg) | |
125 | { | |
126 | if (msg->any.head.cmd & DMSGF_DELETE) | |
127 | dmsg_msg_reply(msg, 0); | |
128 | } | |
129 | ||
130 | static | |
131 | void | |
132 | master_auth_rxmsg(dmsg_msg_t *msg __unused) | |
133 | { | |
134 | } | |
135 | ||
136 | /************************************************************************ | |
137 | * POST-AUTHENTICATION SERVICE MSGS * | |
138 | ************************************************************************ | |
139 | * | |
140 | * Callback via dmsg_iocom_core(). | |
141 | */ | |
142 | static | |
143 | void | |
0d20ec8a | 144 | master_link_signal(dmsg_iocom_t *iocom) |
0c3a8cd0 | 145 | { |
0d20ec8a | 146 | dmsg_msg_lnk_signal(iocom); |
0c3a8cd0 MD |
147 | } |
148 | ||
149 | static | |
150 | void | |
151 | master_link_rxmsg(dmsg_msg_t *msg) | |
152 | { | |
153 | dmsg_state_t *state; | |
1b8eded1 | 154 | dmsg_iocom_t *iocom; |
0c3a8cd0 MD |
155 | uint32_t cmd; |
156 | ||
157 | /* | |
158 | * If the message state has a function established we just | |
159 | * call the function, otherwise we call the appropriate | |
160 | * link-level protocol related to the original command and | |
161 | * let it sort it out. | |
162 | * | |
163 | * Non-transactional one-off messages, on the otherhand, | |
164 | * might have REPLY set. | |
165 | */ | |
166 | state = msg->state; | |
1b8eded1 MD |
167 | iocom = state->iocom; |
168 | cmd = (state != &iocom->state0) ? state->icmd : msg->any.head.cmd; | |
0c3a8cd0 | 169 | |
d30cab67 MD |
170 | if (state->func) { |
171 | /* | |
172 | * Call function or router | |
173 | */ | |
174 | assert(state != &iocom->state0); | |
0c3a8cd0 MD |
175 | state->func(msg); |
176 | } else { | |
d30cab67 MD |
177 | /* |
178 | * Top-level message | |
179 | */ | |
0c3a8cd0 MD |
180 | switch(cmd & DMSGF_PROTOS) { |
181 | case DMSG_PROTO_LNK: | |
182 | dmsg_msg_lnk(msg); | |
183 | break; | |
184 | case DMSG_PROTO_DBG: | |
185 | dmsg_msg_dbg(msg); | |
186 | break; | |
187 | default: | |
1b8eded1 | 188 | iocom->usrmsg_callback(msg, 1); |
0c3a8cd0 MD |
189 | break; |
190 | } | |
191 | } | |
192 | } | |
193 | ||
194 | /* | |
195 | * This is called from the master node to process a received debug | |
196 | * shell command. We process the command, outputting the results, | |
197 | * then finish up by outputting another prompt. | |
198 | */ | |
199 | void | |
200 | dmsg_msg_dbg(dmsg_msg_t *msg) | |
201 | { | |
1b8eded1 MD |
202 | dmsg_iocom_t *iocom = msg->state->iocom; |
203 | ||
8e226bc8 | 204 | switch(msg->tcmd & DMSGF_CMDSWMASK) { |
0c3a8cd0 MD |
205 | case DMSG_DBG_SHELL: |
206 | /* | |
207 | * This is a command which we must process. | |
208 | * When we are finished we generate a final reply. | |
209 | */ | |
210 | if (msg->aux_data) | |
211 | msg->aux_data[msg->aux_size - 1] = 0; | |
1b8eded1 | 212 | iocom->usrmsg_callback(msg, 0); |
0c3a8cd0 MD |
213 | break; |
214 | case DMSG_DBG_SHELL | DMSGF_REPLY: | |
215 | /* | |
216 | * A reply just prints out the string. No newline is added | |
217 | * (it is expected to be embedded if desired). | |
218 | */ | |
219 | if (msg->aux_data) | |
220 | msg->aux_data[msg->aux_size - 1] = 0; | |
221 | if (msg->aux_data) | |
222 | write(2, msg->aux_data, strlen(msg->aux_data)); | |
223 | break; | |
224 | default: | |
1b8eded1 | 225 | iocom->usrmsg_callback(msg, 1); |
0c3a8cd0 MD |
226 | break; |
227 | } | |
228 | } | |
229 | ||
230 | /* | |
231 | * Returns text debug output to the original defined by (msg). (msg) is | |
232 | * not modified and stays intact. We use a one-way message with REPLY set | |
233 | * to distinguish between a debug command and debug terminal output. | |
234 | * | |
1b8eded1 MD |
235 | * To prevent loops dmsg_printf() can filter the message (cmd) related |
236 | * to the dmsg_printf(). We filter out DBG messages. | |
0c3a8cd0 MD |
237 | */ |
238 | void | |
1b8eded1 | 239 | dmsg_printf(dmsg_iocom_t *iocom, const char *ctl, ...) |
0c3a8cd0 MD |
240 | { |
241 | dmsg_msg_t *rmsg; | |
242 | va_list va; | |
243 | char buf[1024]; | |
244 | size_t len; | |
245 | ||
246 | va_start(va, ctl); | |
247 | vsnprintf(buf, sizeof(buf), ctl, va); | |
248 | va_end(va); | |
249 | len = strlen(buf) + 1; | |
250 | ||
1b8eded1 | 251 | rmsg = dmsg_msg_alloc(&iocom->state0, len, |
0d20ec8a MD |
252 | DMSG_DBG_SHELL | DMSGF_REPLY, |
253 | NULL, NULL); | |
0c3a8cd0 MD |
254 | bcopy(buf, rmsg->aux_data, len); |
255 | ||
256 | dmsg_msg_write(rmsg); | |
257 | } |