#2812

Committed 02 May 2025 12:09PM UTC coverage: 73.552% (+0.3%) from 73.293%

Build # #2812

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Merge db5122d7f into 6d951a7a3

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92.45

/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 <config.h>

#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 g_locality;

bool g_mainloop_terminate;

TPM_RESULT
mainloop_cb_get_locality(TPM_MODIFIER_INDICATOR *loc,
                         uint32_t tpmnum SWTPM_ATTR_UNUSED)
{
    *loc = g_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, bool tpm_running)
{
    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) {
            g_mainloop_terminate = true;
            if (rc)
                logprintf(STDERR_FILENO, "Could not send Startup: 0x%x\n", rc);
        }
    }

    while (!g_mainloop_terminate) {

        while (rc == 0) {
            if (mlp->flags & MAIN_LOOP_FLAG_USE_FD) {
                if (connection_fd.fd != mlp->fd) {
                    SWTPM_IO_Disconnect(&connection_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 */
                    g_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,
                                                    &g_mainloop_terminate,
                                                    &g_locality, &tpm_running,
                                                    mlp);
                if (ctrlclntfd < 0 &&
                    mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP)
                    g_mainloop_terminate = true;

                if (g_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) {
                    g_mainloop_terminate = true;
                    break;
                }
            }

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

            /* before processing a command ensure that the storage is locked */
            if ((g_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,
                                                               &g_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,
                                    &g_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 <config.h>
44
45	#include <errno.h>
46	#include <stdio.h>
47	#include <stdint.h>
48	#include <stdbool.h>
49	#include <stdlib.h>
50	#include <string.h>
51	#include <poll.h>
52	#include <sys/stat.h>
53	#include <fcntl.h>
54	#include <sys/socket.h>
55
56	#include <libtpms/tpm_error.h>
57	#include <libtpms/tpm_library.h>
58	#include <libtpms/tpm_memory.h>
59
60	#include "swtpm_debug.h"
61	#include "swtpm_io.h"
62	#include "tpmlib.h"
63	#include "locality.h"
64	#include "logging.h"
65	#include "ctrlchannel.h"
66	#include "mainloop.h"
67	#include "utils.h"
68	#include "sys_dependencies.h"
69	#include "compiler_dependencies.h"
70	#include "swtpm_utils.h"
71	#include "swtpm_nvstore.h"
72
73	/* local variables */
74	static TPM_MODIFIER_INDICATOR g_locality;
75
76	bool g_mainloop_terminate;
77
78	TPM_RESULT
79	mainloop_cb_get_locality(TPM_MODIFIER_INDICATOR *loc,	28,338✔
80	uint32_t tpmnum SWTPM_ATTR_UNUSED)
81	{
82	*loc = g_locality;	28,338✔
83
84	return TPM_SUCCESS;	28,338✔
85	}
86
87	/* ensure that the storage is locked; returns false in case of failure */
88	bool mainloop_ensure_locked_storage(struct mainLoopParams *mlp)	42,390✔
89	{
90	TPM_RESULT res;	42,390✔
91
92	if (mlp->storage_locked)	42,390✔
93	return true;
94
95	/* if NVRAM hasn't been initialized yet locking may need to be retried */
96	res = SWTPM_NVRAM_Lock_Storage(mlp->locking_retries);	155✔
97	if (res == TPM_RETRY)	155✔
98	return true;
99	if (res != TPM_SUCCESS)	29✔
100	return false;
101
102	mlp->locking_retries = 0;	29✔
103	mlp->storage_locked = true;	29✔
104	mlp->incoming_migration = false;	29✔
105
106	return true;	29✔
107	}
108
109	void mainloop_unlock_nvram(struct mainLoopParams *mlp,	7✔
110	unsigned int locking_retries)
111	{
112	SWTPM_NVRAM_Unlock();	7✔
113
114	mlp->storage_locked = false;	7✔
115	mlp->locking_retries = locking_retries;	7✔
116	}	7✔
117
118	int mainLoop(struct mainLoopParams *mlp, int notify_fd, bool tpm_running)	410✔
119	{
120	TPM_RESULT rc = 0;	410✔
121	TPM_CONNECTION_FD connection_fd; /* file descriptor for read/write */	410✔
122	unsigned char command = NULL; / command buffer */	410✔
123	uint32_t command_length; /* actual length of command bytes */	410✔
124	uint32_t max_command_length; /* command buffer size */	410✔
125	off_t cmd_offset;	410✔
126	/* The response buffer is reused for each command. Thus it can grow but never shrink */
127	unsigned char rbuffer = NULL; / actual response bytes */	410✔
128	uint32_t rlength = 0; /* bytes in response buffer */	410✔
129	uint32_t rTotal = 0; /* total allocated bytes */	410✔
130	int ctrlfd;	410✔
131	int ctrlclntfd;	410✔
132	int sockfd;	410✔
133	int ready;	410✔
134	struct iovec iov[3];	410✔
135	uint32_t ack = htobe32(0);	410✔
136	struct tpm2_resp_prefix respprefix;	410✔
137	uint32_t lastCommand;	410✔
138
139	/* poolfd[] indexes */
140	enum {	410✔
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");	410✔
149
150	max_command_length = tpmlib_get_tpm_property(TPMPROP_TPM_BUFFER_MAX) +	410✔
151	sizeof(struct tpm2_send_command_prefix);
152
153	command = malloc(max_command_length);	410✔
154	if (!command) {	410✔
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;	410✔
162	iov[0].iov_len = 0;	410✔
163	iov[2].iov_base = &ack;	410✔
164	iov[2].iov_len = 0;	410✔
165
166	connection_fd.fd = -1;	410✔
167	ctrlfd = ctrlchannel_get_fd(mlp->cc);	410✔
168	ctrlclntfd = ctrlchannel_get_client_fd(mlp->cc);	410✔
169
170	sockfd = SWTPM_IO_GetSocketFD();	410✔
171
172	if (mlp->startupType != _TPM_ST_NONE) {	410✔
173	command_length = tpmlib_create_startup_cmd(	200✔
174	mlp->startupType,
175	mlp->tpmversion,
176	command, max_command_length);
177	if (command_length > 0) {	200✔
178	mlp->lastCommand = tpmlib_get_cmd_ordinal(command, command_length);	200✔
179	rc = TPMLIB_Process(&rbuffer, &rlength, &rTotal,	200✔
180	command, command_length);
181	}
182
183	if (rc \|\| command_length == 0) {	200✔
184	g_mainloop_terminate = true;	×
185	if (rc)	×
186	logprintf(STDERR_FILENO, "Could not send Startup: 0x%x\n", rc);	×
187	}
188	}
189
190	while (!g_mainloop_terminate) {	21,414✔
191
192	while (rc == 0) {	142,159✔
193	if (mlp->flags & MAIN_LOOP_FLAG_USE_FD) {	122,107✔
194	if (connection_fd.fd != mlp->fd) {	1,338✔
195	SWTPM_IO_Disconnect(&connection_fd);	140✔
196	connection_fd.fd = mlp->fd;	140✔
197	}
198	}
199
200	struct pollfd pollfds[] = {	122,107✔
201	[DATA_CLIENT_FD] = {
202	.fd = connection_fd.fd,	122,107✔
203	.events = POLLIN \| POLLHUP,
204	.revents = 0,
205	},
206	[NOTIFY_FD] = {
207	.fd = notify_fd,
208	.events = POLLIN,
209	.revents = 0,
210	},
211	[CTRL_SERVER_FD] = {
212	.fd = -1,
213	.events = POLLIN,
214	.revents = 0,
215	},
216	[CTRL_CLIENT_FD] = {
217	.fd = ctrlclntfd,
218	.events = POLLIN \| POLLHUP,
219	.revents = 0,
220	},
221	[DATA_SERVER_FD] = {
222	/* listen socket for accepting clients */
223	.fd = -1,
224	.events = POLLIN,
225	.revents = 0,
226	}
227	};
228
229	/* only listend for clients if we don't have one */
230	if (connection_fd.fd < 0)	122,107✔
231	pollfds[DATA_SERVER_FD].fd = sockfd;	79,440✔
232	if (ctrlclntfd < 0)	122,107✔
233	pollfds[CTRL_SERVER_FD].fd = ctrlfd;	80,594✔
234
235	ready = poll(pollfds, 5, -1);	122,107✔
236	if (ready < 0 && errno == EINTR)	122,107✔
237	continue;	79,403✔
238
239	if (ready < 0 \|\|	122,104✔
240	(pollfds[NOTIFY_FD].revents & POLLIN) != 0) {	122,104✔
241	SWTPM_IO_Disconnect(&connection_fd);	3✔
242	break;	959✔
243	}
244
245	if (pollfds[DATA_CLIENT_FD].revents & (POLLHUP \| POLLERR)) {	122,101✔
246	logprintf(STDERR_FILENO, "Data client disconnected\n");	87✔
247	mlp->fd = -1;	87✔
248	/* chardev and unixio get this signal, not tcp */
249	if (mlp->flags & MAIN_LOOP_FLAG_END_ON_HUP) {	87✔
250	/* only the chardev terminates here */
UNCOV 251	g_mainloop_terminate = true;	×
UNCOV 252	break;	×
253	}
254	}
255
256	if (pollfds[DATA_SERVER_FD].revents & POLLIN)	122,101✔
257	connection_fd.fd = accept(pollfds[DATA_SERVER_FD].fd, NULL, 0);	20,599✔
258
259	if (pollfds[CTRL_SERVER_FD].revents & POLLIN)	122,101✔
260	ctrlclntfd = accept(ctrlfd, NULL, 0);	18,720✔
261
262	if (pollfds[CTRL_CLIENT_FD].revents & POLLIN) {	122,101✔
263	ctrlclntfd = ctrlchannel_process_fd(ctrlclntfd,	40,542✔
264	&g_mainloop_terminate,
265	&g_locality, &tpm_running,
266	mlp);
267	if (ctrlclntfd < 0 &&	40,542✔
268	mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP)	18,454✔
269	g_mainloop_terminate = true;	4✔
270
271	if (g_mainloop_terminate)	40,542✔
272	break;
273	}
274
275	if (pollfds[CTRL_CLIENT_FD].revents & POLLHUP) {	121,697✔
276	if (ctrlclntfd >= 0)	510✔
277	close(ctrlclntfd);	×
278	ctrlclntfd = -1;	510✔
279	/* unixio gets this signal, not tcp */
280	if (mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP) {	510✔
UNCOV 281	g_mainloop_terminate = true;	×
UNCOV 282	break;	×
283	}
284	}
285
286	if (!(pollfds[DATA_CLIENT_FD].revents & POLLIN))	121,697✔
287	continue;	79,400✔
288
289	/* before processing a command ensure that the storage is locked */
290	if ((g_mainloop_terminate = !mainloop_ensure_locked_storage(mlp)))	42,297✔
291	break;
292
293	/* Read the command. The number of bytes is determined by 'paramSize' in the stream */
294	if (rc == 0) {	42,297✔
295	rc = SWTPM_IO_Read(&connection_fd, command, &command_length,	42,297✔
296	max_command_length);
297	if (rc != 0) {	42,297✔
298	/* connection broke */
299	SWTPM_IO_Disconnect(&connection_fd);	20,226✔
300	}
301	}
302
303	cmd_offset = 0;	42,297✔
304	/* Handle optional TCG Header in front of TPM 2 Command */
305	if (rc == 0 && mlp->tpmversion == TPMLIB_TPM_VERSION_2) {	42,297✔
306	cmd_offset = tpmlib_handle_tcg_tpm2_cmd_header(command,	9,959✔
307	command_length,
308	&g_locality);
309	if (cmd_offset > 0) {	9,959✔
310	/* send header and trailer */
311	iov[0].iov_len = sizeof(respprefix);	6,443✔
312	iov[2].iov_len = sizeof(ack);	6,443✔
313	} else {
314	iov[0].iov_len = 0;	3,516✔
315	iov[2].iov_len = 0;	3,516✔
316	}
317	}
318
319	if (rc == 0) {	42,297✔
320	if (!tpm_running) {	22,071✔
321	tpmlib_write_fatal_error_response(&rbuffer, &rlength,	14✔
322	&rTotal,
323	mlp->tpmversion);
324	goto skip_process;	14✔
325	}
326	}
327
328	if (rc == 0) {	42,283✔
329	lastCommand =	22,057✔
330	tpmlib_get_cmd_ordinal(&command[cmd_offset],	44,114✔
331	command_length - cmd_offset);	22,057✔
332	if (lastCommand != TPM_ORDINAL_NONE)	22,057✔
333	mlp->lastCommand = lastCommand;	22,057✔
334	}
335
336	if (rc == 0) {	42,283✔
337	rlength = 0; /* clear the response buffer */	22,057✔
338	rc = tpmlib_process(&rbuffer,	22,057✔
339	&rlength,
340	&rTotal,
341	&command[cmd_offset],
342	command_length - cmd_offset,
343	mlp->locality_flags,
344	&g_locality,
345	mlp->tpmversion);
346	if (rlength)	22,057✔
UNCOV 347	goto skip_process;	×
348	}
349
350	if (rc == 0) {	42,283✔
351	rlength = 0; /* clear the response buffer */	22,057✔
352	rc = TPMLIB_Process(&rbuffer,	22,057✔
353	&rlength,
354	&rTotal,
355	&command[cmd_offset],
356	command_length - cmd_offset);
357	}
358
359	skip_process:	20,226✔
360	/* write the results */
361	if (rc == 0) {	42,297✔
362	respprefix.size = htobe32(rlength);	22,071✔
363	iov[1].iov_base = rbuffer;	22,071✔
364	iov[1].iov_len = rlength;	22,071✔
365
366	SWTPM_IO_Write(&connection_fd, iov, ARRAY_LEN(iov));	22,071✔
367	}
368
369	if (!(mlp->flags & MAIN_LOOP_FLAG_KEEP_CONNECTION)) {	42,297✔
370	SWTPM_IO_Disconnect(&connection_fd);	549✔
371	break;	549✔
372	}
373	}
374
375	rc = 0; /* A fatal TPM_Process() error should cause the TPM to enter shutdown. IO errors	21,008✔
376	are outside the TPM, so the TPM does not shut down. The main loop should
377	continue to function.*/
378	if (connection_fd.fd < 0 && mlp->flags & MAIN_LOOP_FLAG_TERMINATE)	21,008✔
379	break;
380	}
381
382	if (tpm_running && !mlp->disable_auto_shutdown)	410✔
383	tpmlib_maybe_send_tpm2_shutdown(mlp->tpmversion, &mlp->lastCommand);	5✔
384
385	free(rbuffer);	410✔
386	free(command);	410✔
387
388	if (ctrlclntfd >= 0)	410✔
389	close(ctrlclntfd);	401✔
390	ctrlchannel_set_client_fd(mlp->cc, -1);	410✔
391
392	if (connection_fd.fd >= 0 && !(mlp->flags & MAIN_LOOP_FLAG_USE_FD))	410✔
UNCOV 393	close(connection_fd.fd);	×
394
395	if (mlp->fd >= 0) {	410✔
396	close(mlp->fd);	388✔
397	mlp->fd = -1;	388✔
398	}
399
400	return rc;	410✔
401	}

stefanberger / swtpm / #2812

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