2 * Copyright (c) 2011-2012 The DragonFly Project. All rights reserved.
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>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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
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.
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
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36 #include "dmsg_local.h"
38 static void master_auth_signal(dmsg_iocom_t *iocom);
39 static void master_auth_rxmsg(dmsg_msg_t *msg);
40 static void master_link_signal(dmsg_iocom_t *iocom);
41 static void master_link_rxmsg(dmsg_msg_t *msg);
44 * Service an accepted connection (runs as a pthread)
46 * (also called from a couple of other places)
49 dmsg_master_service(void *data)
51 dmsg_master_service_info_t *info = data;
55 pthread_detach(pthread_self());
57 dmsg_iocom_init(&iocom, info->fd, -1,
60 info->dbgmsg_callback,
63 dmsg_iocom_label(&iocom, "%s", info->label);
67 dmsg_iocom_core(&iocom);
70 "iocom on fd %d terminated error rx=%d, tx=%d\n",
71 info->fd, iocom.ioq_rx.error, iocom.ioq_tx.error);
73 info->fd = -1; /* safety */
74 if (info->exit_callback)
75 info->exit_callback(info->handle);
81 /************************************************************************
83 ************************************************************************
85 * Callback via dmsg_iocom_core().
87 * Additional messaging-based authentication must occur before normal
88 * message operation. The connection has already been encrypted at
91 static void master_auth_conn_rx(dmsg_msg_t *msg);
95 master_auth_signal(dmsg_iocom_t *iocom)
100 * Transmit LNK_CONN, enabling the SPAN protocol if both sides
103 * XXX put additional authentication states here?
105 msg = dmsg_msg_alloc(&iocom->circuit0, 0,
106 DMSG_LNK_CONN | DMSGF_CREATE,
107 master_auth_conn_rx, NULL);
108 msg->any.lnk_conn.peer_mask = (uint64_t)-1;
109 msg->any.lnk_conn.peer_type = DMSG_PEER_CLUSTER;
110 msg->any.lnk_conn.pfs_mask = (uint64_t)-1;
114 dmsg_iocom_restate(iocom,
122 master_auth_conn_rx(dmsg_msg_t *msg)
124 if (msg->any.head.cmd & DMSGF_DELETE)
125 dmsg_msg_reply(msg, 0);
130 master_auth_rxmsg(dmsg_msg_t *msg __unused)
134 /************************************************************************
135 * POST-AUTHENTICATION SERVICE MSGS *
136 ************************************************************************
138 * Callback via dmsg_iocom_core().
142 master_link_signal(dmsg_iocom_t *iocom)
144 dmsg_msg_lnk_signal(iocom);
149 master_link_rxmsg(dmsg_msg_t *msg)
155 * If the message state has a function established we just
156 * call the function, otherwise we call the appropriate
157 * link-level protocol related to the original command and
158 * let it sort it out.
160 * Non-transactional one-off messages, on the otherhand,
161 * might have REPLY set.
164 cmd = state ? state->icmd : msg->any.head.cmd;
166 if (state && state->func) {
167 assert(state->func != NULL);
170 switch(cmd & DMSGF_PROTOS) {
178 dmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
185 * This is called from the master node to process a received debug
186 * shell command. We process the command, outputting the results,
187 * then finish up by outputting another prompt.
190 dmsg_msg_dbg(dmsg_msg_t *msg)
192 switch(msg->any.head.cmd & DMSGF_CMDSWMASK) {
195 * This is a command which we must process.
196 * When we are finished we generate a final reply.
199 msg->aux_data[msg->aux_size - 1] = 0;
200 msg->iocom->dbgmsg_callback(msg);
201 dmsg_msg_reply(msg, 0); /* XXX send prompt instead */
203 case DMSG_DBG_SHELL | DMSGF_REPLY:
205 * A reply just prints out the string. No newline is added
206 * (it is expected to be embedded if desired).
209 msg->aux_data[msg->aux_size - 1] = 0;
211 write(2, msg->aux_data, strlen(msg->aux_data));
214 dmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
220 * Returns text debug output to the original defined by (msg). (msg) is
221 * not modified and stays intact. We use a one-way message with REPLY set
222 * to distinguish between a debug command and debug terminal output.
224 * To prevent loops circuit_printf() can filter the message (cmd) related
225 * to the circuit_printf(). We filter out DBG messages.
228 dmsg_circuit_printf(dmsg_circuit_t *circuit, const char *ctl, ...)
236 vsnprintf(buf, sizeof(buf), ctl, va);
238 len = strlen(buf) + 1;
240 rmsg = dmsg_msg_alloc(circuit, len,
241 DMSG_DBG_SHELL | DMSGF_REPLY,
243 bcopy(buf, rmsg->aux_data, len);
245 dmsg_msg_write(rmsg);