621325588

Committed 05 May 2024 09:04PM UTC coverage: 73.542% (+0.2%) from 73.324%

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Merge defd1f468 into bfd6b8270

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/src/swtpm/mainloop.c

/*
 * mainloop.c -- The TPM Emulator's main processing loop
 *
 * (c) Copyright IBM Corporation 2014, 2015, 2016
 *
 * Author: Stefan Berger <stefanb@us.ibm.com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * Neither the names of the IBM Corporation nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* mainLoop() is the main server loop.

   It reads a TPM request, processes the ordinal, and writes the response
*/

#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <poll.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/socket.h>

#include <libtpms/tpm_error.h>
#include <libtpms/tpm_library.h>
#include <libtpms/tpm_memory.h>

#include "swtpm_debug.h"
#include "swtpm_io.h"
#include "tpmlib.h"
#include "locality.h"
#include "logging.h"
#include "ctrlchannel.h"
#include "mainloop.h"
#include "utils.h"
#include "sys_dependencies.h"
#include "compiler_dependencies.h"
#include "swtpm_utils.h"
#include "swtpm_nvstore.h"

/* local variables */
static TPM_MODIFIER_INDICATOR locality;
bool tpm_running = false;

bool mainloop_terminate;

TPM_RESULT
mainloop_cb_get_locality(TPM_MODIFIER_INDICATOR *loc,
                         uint32_t tpmnum SWTPM_ATTR_UNUSED)
{
    *loc = locality;

    return TPM_SUCCESS;
}

/* ensure that the storage is locked; returns false in case of failure */
bool mainloop_ensure_locked_storage(struct mainLoopParams *mlp)
{
    TPM_RESULT res;

    if (mlp->storage_locked)
        return true;

    /* if NVRAM hasn't been initialized yet locking may need to be retried */
    res = SWTPM_NVRAM_Lock_Storage(mlp->locking_retries);
    if (res == TPM_RETRY)
        return true;
    if (res != TPM_SUCCESS)
        return false;

    mlp->locking_retries = 0;
    mlp->storage_locked = true;
    mlp->incoming_migration = false;

    return true;
}

void mainloop_unlock_nvram(struct mainLoopParams *mlp,
                           unsigned int locking_retries)
{
    SWTPM_NVRAM_Unlock();

    mlp->storage_locked = false;
    mlp->locking_retries = locking_retries;
}

int mainLoop(struct mainLoopParams *mlp,
             int notify_fd)
{
    TPM_RESULT          rc = 0;
    TPM_CONNECTION_FD   connection_fd;             /* file descriptor for read/write */
    unsigned char       *command = NULL;           /* command buffer */
    uint32_t            command_length;            /* actual length of command bytes */
    uint32_t            max_command_length;        /* command buffer size */
    off_t               cmd_offset;
    /* The response buffer is reused for each command. Thus it can grow but never shrink */
    unsigned char       *rbuffer = NULL;           /* actual response bytes */
    uint32_t            rlength = 0;               /* bytes in response buffer */
    uint32_t            rTotal = 0;                /* total allocated bytes */
    int                 ctrlfd;
    int                 ctrlclntfd;
    int                 sockfd;
    int                 ready;
    struct iovec        iov[3];
    uint32_t            ack = htobe32(0);
    struct tpm2_resp_prefix respprefix;
    uint32_t            lastCommand;

    /* poolfd[] indexes */
    enum {
        DATA_CLIENT_FD = 0,
        NOTIFY_FD,
        CTRL_SERVER_FD,
        CTRL_CLIENT_FD,
        DATA_SERVER_FD
    };

    TPM_DEBUG("mainLoop:\n");

    max_command_length = tpmlib_get_tpm_property(TPMPROP_TPM_BUFFER_MAX) +
                         sizeof(struct tpm2_send_command_prefix);

    command = malloc(max_command_length);
    if (!command) {
        logprintf(STDERR_FILENO, "Could not allocate %u bytes for buffer.\n",
                  max_command_length);
        return TPM_FAIL;
    }

    /* header and trailer that we may send by setting iov_len */
    iov[0].iov_base = &respprefix;
    iov[0].iov_len = 0;
    iov[2].iov_base = &ack;
    iov[2].iov_len = 0;

    connection_fd.fd = -1;
    ctrlfd = ctrlchannel_get_fd(mlp->cc);
    ctrlclntfd = ctrlchannel_get_client_fd(mlp->cc);

    sockfd = SWTPM_IO_GetSocketFD();

    if (mlp->startupType != _TPM_ST_NONE) {
        command_length = tpmlib_create_startup_cmd(
                                  mlp->startupType,
                                  mlp->tpmversion,
                                  command, max_command_length);
        if (command_length > 0) {
            mlp->lastCommand = tpmlib_get_cmd_ordinal(command, command_length);
            rc = TPMLIB_Process(&rbuffer, &rlength, &rTotal,
                                command, command_length);
        }

        if (rc || command_length == 0) {
            mainloop_terminate = true;
            if (rc)
                logprintf(STDERR_FILENO, "Could not send Startup: 0x%x\n", rc);
        }
    }

    while (!mainloop_terminate) {

        while (rc == 0) {
            if (mlp->flags & MAIN_LOOP_FLAG_USE_FD)
                connection_fd.fd = mlp->fd;

            struct pollfd pollfds[] = {
                [DATA_CLIENT_FD] = {
                    .fd = connection_fd.fd,
                    .events = POLLIN | POLLHUP,
                    .revents = 0,
                },
                [NOTIFY_FD] = {
                    .fd = notify_fd,
                    .events = POLLIN,
                    .revents = 0,
                },
                [CTRL_SERVER_FD] = {
                    .fd = -1,
                    .events = POLLIN,
                    .revents = 0,
                },
                [CTRL_CLIENT_FD] = {
                    .fd = ctrlclntfd,
                    .events = POLLIN | POLLHUP,
                    .revents = 0,
                },
                [DATA_SERVER_FD] = {
                    /* listen socket for accepting clients */
                    .fd = -1,
                    .events = POLLIN,
                    .revents = 0,
                }
            };

            /* only listend for clients if we don't have one */
            if (connection_fd.fd < 0)
                pollfds[DATA_SERVER_FD].fd = sockfd;
            if (ctrlclntfd < 0)
                pollfds[CTRL_SERVER_FD].fd = ctrlfd;

            ready = poll(pollfds, 5, -1);
            if (ready < 0 && errno == EINTR)
                continue;

            if (ready < 0 ||
                (pollfds[NOTIFY_FD].revents & POLLIN) != 0) {
                SWTPM_IO_Disconnect(&connection_fd);
                break;
            }

            if (pollfds[DATA_CLIENT_FD].revents & (POLLHUP | POLLERR)) {
                logprintf(STDERR_FILENO, "Data client disconnected\n");
                mlp->fd = -1;
                /* chardev and unixio get this signal, not tcp */
                if (mlp->flags & MAIN_LOOP_FLAG_END_ON_HUP) {
                    /* only the chardev terminates here */
                    mainloop_terminate = true;
                    break;
                }
            }

            if (pollfds[DATA_SERVER_FD].revents & POLLIN)
                connection_fd.fd = accept(pollfds[DATA_SERVER_FD].fd, NULL, 0);

            if (pollfds[CTRL_SERVER_FD].revents & POLLIN)
                ctrlclntfd = accept(ctrlfd, NULL, 0);

            if (pollfds[CTRL_CLIENT_FD].revents & POLLIN) {
                ctrlclntfd = ctrlchannel_process_fd(ctrlclntfd,
                                                    &mainloop_terminate,
                                                    &locality, &tpm_running,
                                                    mlp);
                if (ctrlclntfd < 0 &&
                    mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP)
                    mainloop_terminate = true;

                if (mainloop_terminate)
                    break;
            }

            if (pollfds[CTRL_CLIENT_FD].revents & POLLHUP) {
                if (ctrlclntfd >= 0)
                    close(ctrlclntfd);
                ctrlclntfd = -1;
                /* unixio gets this signal, not tcp */
                if (mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP) {
                    mainloop_terminate = true;
                    break;
                }
            }

            if (!(pollfds[DATA_CLIENT_FD].revents & POLLIN))
                continue;

            /* before processing a command ensure that the storage is locked */
            if ((mainloop_terminate = !mainloop_ensure_locked_storage(mlp)))
                break;

            /* Read the command.  The number of bytes is determined by 'paramSize' in the stream */
            if (rc == 0) {
                rc = SWTPM_IO_Read(&connection_fd, command, &command_length,
                                   max_command_length);
                if (rc != 0) {
                    /* connection broke */
                    SWTPM_IO_Disconnect(&connection_fd);
                }
            }

            cmd_offset = 0;
            /* Handle optional TCG Header in front of TPM 2 Command */
            if (rc == 0 && mlp->tpmversion == TPMLIB_TPM_VERSION_2) {
                cmd_offset = tpmlib_handle_tcg_tpm2_cmd_header(command,
                                                               command_length,
                                                               &locality);
                if (cmd_offset > 0) {
                    /* send header and trailer */
                    iov[0].iov_len = sizeof(respprefix);
                    iov[2].iov_len = sizeof(ack);
                } else {
                    iov[0].iov_len = 0;
                    iov[2].iov_len = 0;
                }
            }

            if (rc == 0) {
                if (!tpm_running) {
                    tpmlib_write_fatal_error_response(&rbuffer, &rlength,
                                                      &rTotal,
                                                      mlp->tpmversion);
                    goto skip_process;
                }
            }

            if (rc == 0) {
                lastCommand =
                    tpmlib_get_cmd_ordinal(&command[cmd_offset],
                                           command_length - cmd_offset);
                if (lastCommand != TPM_ORDINAL_NONE)
                    mlp->lastCommand = lastCommand;
            }

            if (rc == 0) {
                rlength = 0;                                /* clear the response buffer */
                rc = tpmlib_process(&rbuffer,
                                    &rlength,
                                    &rTotal,
                                    &command[cmd_offset],
                                    command_length - cmd_offset,
                                    mlp->locality_flags,
                                    &locality,
                                    mlp->tpmversion);
                if (rlength)
                    goto skip_process;
            }

            if (rc == 0) {
                rlength = 0;                                /* clear the response buffer */
                rc = TPMLIB_Process(&rbuffer,
                                    &rlength,
                                    &rTotal,
                                    &command[cmd_offset],
                                    command_length - cmd_offset);
            }

skip_process:
            /* write the results */
            if (rc == 0) {
                respprefix.size = htobe32(rlength);
                iov[1].iov_base = rbuffer;
                iov[1].iov_len  = rlength;

                SWTPM_IO_Write(&connection_fd, iov, ARRAY_LEN(iov));
            }

            if (!(mlp->flags & MAIN_LOOP_FLAG_KEEP_CONNECTION)) {
                SWTPM_IO_Disconnect(&connection_fd);
                break;
            }
        }

        rc = 0; /* A fatal TPM_Process() error should cause the TPM to enter shutdown.  IO errors
                   are outside the TPM, so the TPM does not shut down.  The main loop should
                   continue to function.*/
        if (connection_fd.fd < 0 && mlp->flags & MAIN_LOOP_FLAG_TERMINATE)
            break;
    }

    if (tpm_running && !mlp->disable_auto_shutdown)
        tpmlib_maybe_send_tpm2_shutdown(mlp->tpmversion, &mlp->lastCommand);

    free(rbuffer);
    free(command);

    if (ctrlclntfd >= 0)
        close(ctrlclntfd);
    ctrlchannel_set_client_fd(mlp->cc, -1);

    if (connection_fd.fd >= 0 && !(mlp->flags & MAIN_LOOP_FLAG_USE_FD))
        close(connection_fd.fd);

    if (mlp->fd >= 0) {
        close(mlp->fd);
        mlp->fd = -1;
    }

    return rc;
}

1	/*
2	* mainloop.c -- The TPM Emulator's main processing loop
3	*
4	* (c) Copyright IBM Corporation 2014, 2015, 2016
5	*
6	* Author: Stefan Berger <stefanb@us.ibm.com>
7	*
8	* All rights reserved.
9	*
10	* Redistribution and use in source and binary forms, with or without
11	* modification, are permitted provided that the following conditions are
12	* met:
13	*
14	* Redistributions of source code must retain the above copyright notice,
15	* this list of conditions and the following disclaimer.
16	*
17	* Redistributions in binary form must reproduce the above copyright
18	* notice, this list of conditions and the following disclaimer in the
19	* documentation and/or other materials provided with the distribution.
20	*
21	* Neither the names of the IBM Corporation nor the names of its
22	* contributors may be used to endorse or promote products derived from
23	* this software without specific prior written permission.
24	*
25	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29	* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36	*/
37
38	/* mainLoop() is the main server loop.
39
40	It reads a TPM request, processes the ordinal, and writes the response
41	*/
42
43	#include <errno.h>
44	#include <stdio.h>
45	#include <stdint.h>
46	#include <stdbool.h>
47	#include <stdlib.h>
48	#include <string.h>
49	#include <poll.h>
50	#include <sys/stat.h>
51	#include <fcntl.h>
52	#include <sys/socket.h>
53
54	#include <libtpms/tpm_error.h>
55	#include <libtpms/tpm_library.h>
56	#include <libtpms/tpm_memory.h>
57
58	#include "swtpm_debug.h"
59	#include "swtpm_io.h"
60	#include "tpmlib.h"
61	#include "locality.h"
62	#include "logging.h"
63	#include "ctrlchannel.h"
64	#include "mainloop.h"
65	#include "utils.h"
66	#include "sys_dependencies.h"
67	#include "compiler_dependencies.h"
68	#include "swtpm_utils.h"
69	#include "swtpm_nvstore.h"
70
71	/* local variables */
72	static TPM_MODIFIER_INDICATOR locality;
73	bool tpm_running = false;
74
75	bool mainloop_terminate;
76
77	TPM_RESULT
78	mainloop_cb_get_locality(TPM_MODIFIER_INDICATOR *loc,	27,716✔
79	uint32_t tpmnum SWTPM_ATTR_UNUSED)
80	{
81	*loc = locality;	27,716✔
82
83	return TPM_SUCCESS;	27,716✔
84	}
85
86	/* ensure that the storage is locked; returns false in case of failure */
87	bool mainloop_ensure_locked_storage(struct mainLoopParams *mlp)	41,884✔
88	{
89	TPM_RESULT res;	41,884✔
90
91	if (mlp->storage_locked)	41,884✔
92	return true;
93
94	/* if NVRAM hasn't been initialized yet locking may need to be retried */
95	res = SWTPM_NVRAM_Lock_Storage(mlp->locking_retries);	155✔
96	if (res == TPM_RETRY)	155✔
97	return true;
98	if (res != TPM_SUCCESS)	28✔
99	return false;
100
101	mlp->locking_retries = 0;	28✔
102	mlp->storage_locked = true;	28✔
103	mlp->incoming_migration = false;	28✔
104
105	return true;	28✔
106	}
107
108	void mainloop_unlock_nvram(struct mainLoopParams *mlp,	7✔
109	unsigned int locking_retries)
110	{
111	SWTPM_NVRAM_Unlock();	7✔
112
113	mlp->storage_locked = false;	7✔
114	mlp->locking_retries = locking_retries;	7✔
115	}	7✔
116
117	int mainLoop(struct mainLoopParams *mlp,	295✔
118	int notify_fd)
119	{
120	TPM_RESULT rc = 0;	295✔
121	TPM_CONNECTION_FD connection_fd; /* file descriptor for read/write */	295✔
122	unsigned char command = NULL; / command buffer */	295✔
123	uint32_t command_length; /* actual length of command bytes */	295✔
124	uint32_t max_command_length; /* command buffer size */	295✔
125	off_t cmd_offset;	295✔
126	/* The response buffer is reused for each command. Thus it can grow but never shrink */
127	unsigned char rbuffer = NULL; / actual response bytes */	295✔
128	uint32_t rlength = 0; /* bytes in response buffer */	295✔
129	uint32_t rTotal = 0; /* total allocated bytes */	295✔
130	int ctrlfd;	295✔
131	int ctrlclntfd;	295✔
132	int sockfd;	295✔
133	int ready;	295✔
134	struct iovec iov[3];	295✔
135	uint32_t ack = htobe32(0);	295✔
136	struct tpm2_resp_prefix respprefix;	295✔
137	uint32_t lastCommand;	295✔
138
139	/* poolfd[] indexes */
140	enum {	295✔
141	DATA_CLIENT_FD = 0,
142	NOTIFY_FD,
143	CTRL_SERVER_FD,
144	CTRL_CLIENT_FD,
145	DATA_SERVER_FD
146	};
147
148	TPM_DEBUG("mainLoop:\n");	295✔
149
150	max_command_length = tpmlib_get_tpm_property(TPMPROP_TPM_BUFFER_MAX) +	295✔
151	sizeof(struct tpm2_send_command_prefix);
152
153	command = malloc(max_command_length);	295✔
154	if (!command) {	295✔
155	logprintf(STDERR_FILENO, "Could not allocate %u bytes for buffer.\n",	×
156	max_command_length);
157	return TPM_FAIL;	×
158	}
159
160	/* header and trailer that we may send by setting iov_len */
161	iov[0].iov_base = &respprefix;	295✔
162	iov[0].iov_len = 0;	295✔
163	iov[2].iov_base = &ack;	295✔
164	iov[2].iov_len = 0;	295✔
165
166	connection_fd.fd = -1;	295✔
167	ctrlfd = ctrlchannel_get_fd(mlp->cc);	295✔
168	ctrlclntfd = ctrlchannel_get_client_fd(mlp->cc);	295✔
169
170	sockfd = SWTPM_IO_GetSocketFD();	295✔
171
172	if (mlp->startupType != _TPM_ST_NONE) {	295✔
173	command_length = tpmlib_create_startup_cmd(	85✔
174	mlp->startupType,
175	mlp->tpmversion,
176	command, max_command_length);
177	if (command_length > 0) {	85✔
178	mlp->lastCommand = tpmlib_get_cmd_ordinal(command, command_length);	85✔
179	rc = TPMLIB_Process(&rbuffer, &rlength, &rTotal,	85✔
180	command, command_length);
181	}
182
183	if (rc \|\| command_length == 0) {	85✔
184	mainloop_terminate = true;	×
185	if (rc)	×
186	logprintf(STDERR_FILENO, "Could not send Startup: 0x%x\n", rc);	×
187	}
188	}
189
190	while (!mainloop_terminate) {	20,989✔
191
192	while (rc == 0) {	139,721✔
193	if (mlp->flags & MAIN_LOOP_FLAG_USE_FD)	119,807✔
194	connection_fd.fd = mlp->fd;	1,030✔
195
196	struct pollfd pollfds[] = {	119,807✔
197	[DATA_CLIENT_FD] = {
198	.fd = connection_fd.fd,	119,807✔
199	.events = POLLIN \| POLLHUP,
200	.revents = 0,
201	},
202	[NOTIFY_FD] = {
203	.fd = notify_fd,
204	.events = POLLIN,
205	.revents = 0,
206	},
207	[CTRL_SERVER_FD] = {
208	.fd = -1,
209	.events = POLLIN,
210	.revents = 0,
211	},
212	[CTRL_CLIENT_FD] = {
213	.fd = ctrlclntfd,
214	.events = POLLIN \| POLLHUP,
215	.revents = 0,
216	},
217	[DATA_SERVER_FD] = {
218	/* listen socket for accepting clients */
219	.fd = -1,
220	.events = POLLIN,
221	.revents = 0,
222	}
223	};
224
225	/* only listend for clients if we don't have one */
226	if (connection_fd.fd < 0)	119,807✔
227	pollfds[DATA_SERVER_FD].fd = sockfd;	77,785✔
228	if (ctrlclntfd < 0)	119,807✔
229	pollfds[CTRL_SERVER_FD].fd = ctrlfd;	79,564✔
230
231	ready = poll(pollfds, 5, -1);	119,807✔
232	if (ready < 0 && errno == EINTR)	119,807✔
233	continue;	77,724✔
234
235	if (ready < 0 \|\|	119,804✔
236	(pollfds[NOTIFY_FD].revents & POLLIN) != 0) {	119,804✔
237	SWTPM_IO_Disconnect(&connection_fd);	3✔
238	break;	787✔
239	}
240
241	if (pollfds[DATA_CLIENT_FD].revents & (POLLHUP \| POLLERR)) {	119,801✔
242	logprintf(STDERR_FILENO, "Data client disconnected\n");	158✔
243	mlp->fd = -1;	158✔
244	/* chardev and unixio get this signal, not tcp */
245	if (mlp->flags & MAIN_LOOP_FLAG_END_ON_HUP) {	158✔
246	/* only the chardev terminates here */
247	mainloop_terminate = true;	×
248	break;	×
249	}
250	}
251
252	if (pollfds[DATA_SERVER_FD].revents & POLLIN)	119,801✔
253	connection_fd.fd = accept(pollfds[DATA_SERVER_FD].fd, NULL, 0);	20,404✔
254
255	if (pollfds[CTRL_SERVER_FD].revents & POLLIN)	119,801✔
256	ctrlclntfd = accept(ctrlfd, NULL, 0);	18,190✔
257
258	if (pollfds[CTRL_CLIENT_FD].revents & POLLIN) {	119,801✔
259	ctrlclntfd = ctrlchannel_process_fd(ctrlclntfd,	39,440✔
260	&mainloop_terminate,
261	&locality, &tpm_running,
262	mlp);
263	if (ctrlclntfd < 0 &&	39,440✔
264	mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP)	17,981✔
265	mainloop_terminate = true;	4✔
266
267	if (mainloop_terminate)	39,440✔
268	break;
269	}
270
271	if (pollfds[CTRL_CLIENT_FD].revents & POLLHUP) {	119,512✔
272	if (ctrlclntfd >= 0)	529✔
273	close(ctrlclntfd);	×
274	ctrlclntfd = -1;	529✔
275	/* unixio gets this signal, not tcp */
276	if (mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP) {	529✔
277	mainloop_terminate = true;	×
278	break;	×
279	}
280	}
281
282	if (!(pollfds[DATA_CLIENT_FD].revents & POLLIN))	119,512✔
283	continue;	77,721✔
284
285	/* before processing a command ensure that the storage is locked */
286	if ((mainloop_terminate = !mainloop_ensure_locked_storage(mlp)))	41,791✔
287	break;
288
289	/* Read the command. The number of bytes is determined by 'paramSize' in the stream */
290	if (rc == 0) {	41,791✔
291	rc = SWTPM_IO_Read(&connection_fd, command, &command_length,	41,791✔
292	max_command_length);
293	if (rc != 0) {	41,791✔
294	/* connection broke */
295	SWTPM_IO_Disconnect(&connection_fd);	20,029✔
296	}
297	}
298
299	cmd_offset = 0;	41,791✔
300	/* Handle optional TCG Header in front of TPM 2 Command */
301	if (rc == 0 && mlp->tpmversion == TPMLIB_TPM_VERSION_2) {	41,791✔
302	cmd_offset = tpmlib_handle_tcg_tpm2_cmd_header(command,	9,647✔
303	command_length,
304	&locality);
305	if (cmd_offset > 0) {	9,647✔
306	/* send header and trailer */
307	iov[0].iov_len = sizeof(respprefix);	6,301✔
308	iov[2].iov_len = sizeof(ack);	6,301✔
309	} else {
310	iov[0].iov_len = 0;	3,346✔
311	iov[2].iov_len = 0;	3,346✔
312	}
313	}
314
315	if (rc == 0) {	41,791✔
316	if (!tpm_running) {	21,762✔
317	tpmlib_write_fatal_error_response(&rbuffer, &rlength,	15✔
318	&rTotal,
319	mlp->tpmversion);
320	goto skip_process;	15✔
321	}
322	}
323
324	if (rc == 0) {	41,776✔
325	lastCommand =	21,747✔
326	tpmlib_get_cmd_ordinal(&command[cmd_offset],	43,494✔
327	command_length - cmd_offset);	21,747✔
328	if (lastCommand != TPM_ORDINAL_NONE)	21,747✔
329	mlp->lastCommand = lastCommand;	21,747✔
330	}
331
332	if (rc == 0) {	41,776✔
333	rlength = 0; /* clear the response buffer */	21,747✔
334	rc = tpmlib_process(&rbuffer,	21,747✔
335	&rlength,
336	&rTotal,
337	&command[cmd_offset],
338	command_length - cmd_offset,
339	mlp->locality_flags,
340	&locality,
341	mlp->tpmversion);
342	if (rlength)	21,747✔
343	goto skip_process;	×
344	}
345
346	if (rc == 0) {	41,776✔
347	rlength = 0; /* clear the response buffer */	21,747✔
348	rc = TPMLIB_Process(&rbuffer,	21,747✔
349	&rlength,
350	&rTotal,
351	&command[cmd_offset],
352	command_length - cmd_offset);
353	}
354
355	skip_process:	20,029✔
356	/* write the results */
357	if (rc == 0) {	41,791✔
358	respprefix.size = htobe32(rlength);	21,762✔
359	iov[1].iov_base = rbuffer;	21,762✔
360	iov[1].iov_len = rlength;	21,762✔
361
362	SWTPM_IO_Write(&connection_fd, iov, ARRAY_LEN(iov));	21,762✔
363	}
364
365	if (!(mlp->flags & MAIN_LOOP_FLAG_KEEP_CONNECTION)) {	41,791✔
366	SWTPM_IO_Disconnect(&connection_fd);	492✔
367	break;	492✔
368	}
369	}
370
371	rc = 0; /* A fatal TPM_Process() error should cause the TPM to enter shutdown. IO errors	20,698✔
372	are outside the TPM, so the TPM does not shut down. The main loop should
373	continue to function.*/
374	if (connection_fd.fd < 0 && mlp->flags & MAIN_LOOP_FLAG_TERMINATE)	20,698✔
375	break;
376	}
377
378	if (tpm_running && !mlp->disable_auto_shutdown)	295✔
379	tpmlib_maybe_send_tpm2_shutdown(mlp->tpmversion, &mlp->lastCommand);	5✔
380
381	free(rbuffer);	295✔
382	free(command);	295✔
383
384	if (ctrlclntfd >= 0)	295✔
385	close(ctrlclntfd);	287✔
386	ctrlchannel_set_client_fd(mlp->cc, -1);	295✔
387
388	if (connection_fd.fd >= 0 && !(mlp->flags & MAIN_LOOP_FLAG_USE_FD))	295✔
389	close(connection_fd.fd);	×
390
391	if (mlp->fd >= 0) {	295✔
392	close(mlp->fd);	248✔
393	mlp->fd = -1;	248✔
394	}
395
396	return rc;	295✔
397	}

stefanberger / swtpm / 621325588

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