#2885

Committed 24 Feb 2026 07:01PM UTC coverage: 71.687% (-0.7%) from 72.417%

Build # #2885

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Merge 4834fc88d into 48358b244

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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 <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) {
            pcap_packet_record_write(&mlp->ps, command, command_length, true);

            mlp->lastCommand = tpmlib_get_cmd_ordinal(command, command_length);
            rc = TPMLIB_Process(&rbuffer, &rlength, &rTotal,
                                command, command_length);

            pcap_packet_record_write(&mlp->ps, rbuffer, rlength, true);
        }

        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, &mlp->ps);
                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),
                               &mlp->ps);
            }

            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,
                                        &mlp->ps);

    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,	28,531✔
80	uint32_t tpmnum SWTPM_ATTR_UNUSED)
81	{
82	*loc = g_locality;	28,531✔
83
84	return TPM_SUCCESS;	28,531✔
85	}
86
87	/* ensure that the storage is locked; returns false in case of failure */
88	bool mainloop_ensure_locked_storage(struct mainLoopParams *mlp)	42,570✔
89	{
90	TPM_RESULT res;	42,570✔
91
92	if (mlp->storage_locked)	42,570✔
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)	423✔
119	{
120	TPM_RESULT rc = 0;	423✔
121	TPM_CONNECTION_FD connection_fd; /* file descriptor for read/write */	423✔
122	unsigned char command = NULL; / command buffer */	423✔
123	uint32_t command_length; /* actual length of command bytes */	423✔
124	uint32_t max_command_length; /* command buffer size */	423✔
125	off_t cmd_offset;	423✔
126	/* The response buffer is reused for each command. Thus it can grow but never shrink */
127	unsigned char rbuffer = NULL; / actual response bytes */	423✔
128	uint32_t rlength = 0; /* bytes in response buffer */	423✔
129	uint32_t rTotal = 0; /* total allocated bytes */	423✔
130	int ctrlfd;	423✔
131	int ctrlclntfd;	423✔
132	int sockfd;	423✔
133	int ready;	423✔
134	struct iovec iov[3];	423✔
135	uint32_t ack = htobe32(0);	423✔
136	struct tpm2_resp_prefix respprefix;	423✔
137	uint32_t lastCommand;	423✔
138
139	/* poolfd[] indexes */
140	enum {	423✔
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");	423✔
149
150	max_command_length = tpmlib_get_tpm_property(TPMPROP_TPM_BUFFER_MAX) +	423✔
151	sizeof(struct tpm2_send_command_prefix);
152
153	command = malloc(max_command_length);	423✔
154	if (!command) {	423✔
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;	423✔
162	iov[0].iov_len = 0;	423✔
163	iov[2].iov_base = &ack;	423✔
164	iov[2].iov_len = 0;	423✔
165
166	connection_fd.fd = -1;	423✔
167	ctrlfd = ctrlchannel_get_fd(mlp->cc);	423✔
168	ctrlclntfd = ctrlchannel_get_client_fd(mlp->cc);	423✔
169
170	sockfd = SWTPM_IO_GetSocketFD();	423✔
171
172	if (mlp->startupType != _TPM_ST_NONE) {	423✔
173	command_length = tpmlib_create_startup_cmd(	213✔
174	mlp->startupType,
175	mlp->tpmversion,
176	command, max_command_length);
177	if (command_length > 0) {	213✔
178	pcap_packet_record_write(&mlp->ps, command, command_length, true);	213✔
179
180	mlp->lastCommand = tpmlib_get_cmd_ordinal(command, command_length);	213✔
181	rc = TPMLIB_Process(&rbuffer, &rlength, &rTotal,	213✔
182	command, command_length);
183
184	pcap_packet_record_write(&mlp->ps, rbuffer, rlength, true);	213✔
185	}
186
187	if (rc \|\| command_length == 0) {	213✔
188	g_mainloop_terminate = true;	×
189	if (rc)	×
190	logprintf(STDERR_FILENO, "Could not send Startup: 0x%x\n", rc);	×
191	}
192	}
193
194	while (!g_mainloop_terminate) {	21,476✔
195
196	while (rc == 0) {	142,705✔
197	if (mlp->flags & MAIN_LOOP_FLAG_USE_FD) {	122,619✔
198	if (connection_fd.fd != mlp->fd) {	1,480✔
199	SWTPM_IO_Disconnect(&connection_fd);	150✔
200	connection_fd.fd = mlp->fd;	150✔
201	}
202	}
203
204	struct pollfd pollfds[] = {	122,619✔
205	[DATA_CLIENT_FD] = {
206	.fd = connection_fd.fd,	122,619✔
207	.events = POLLIN \| POLLHUP,
208	.revents = 0,
209	},
210	[NOTIFY_FD] = {
211	.fd = notify_fd,
212	.events = POLLIN,
213	.revents = 0,
214	},
215	[CTRL_SERVER_FD] = {
216	.fd = -1,
217	.events = POLLIN,
218	.revents = 0,
219	},
220	[CTRL_CLIENT_FD] = {
221	.fd = ctrlclntfd,
222	.events = POLLIN \| POLLHUP,
223	.revents = 0,
224	},
225	[DATA_SERVER_FD] = {
226	/* listen socket for accepting clients */
227	.fd = -1,
228	.events = POLLIN,
229	.revents = 0,
230	}
231	};
232
233	/* only listend for clients if we don't have one */
234	if (connection_fd.fd < 0)	122,619✔
235	pollfds[DATA_SERVER_FD].fd = sockfd;	79,740✔
236	if (ctrlclntfd < 0)	122,619✔
237	pollfds[CTRL_SERVER_FD].fd = ctrlfd;	80,783✔
238
239	ready = poll(pollfds, 5, -1);	122,619✔
240	if (ready < 0 && errno == EINTR)	122,619✔
241	continue;	79,722✔
242
243	if (ready < 0 \|\|	122,616✔
244	(pollfds[NOTIFY_FD].revents & POLLIN) != 0) {	122,616✔
245	SWTPM_IO_Disconnect(&connection_fd);	3✔
246	break;	974✔
247	}
248
249	if (pollfds[DATA_CLIENT_FD].revents & (POLLHUP \| POLLERR)) {	122,613✔
250	logprintf(STDERR_FILENO, "Data client disconnected\n");	87✔
251	mlp->fd = -1;	87✔
252	/* chardev and unixio get this signal, not tcp */
253	if (mlp->flags & MAIN_LOOP_FLAG_END_ON_HUP) {	87✔
254	/* only the chardev terminates here */
255	g_mainloop_terminate = true;	×
256	break;	×
257	}
258	}
259
260	if (pollfds[DATA_SERVER_FD].revents & POLLIN)	122,613✔
261	connection_fd.fd = accept(pollfds[DATA_SERVER_FD].fd, NULL, 0);	20,635✔
262
263	if (pollfds[CTRL_SERVER_FD].revents & POLLIN)	122,613✔
264	ctrlclntfd = accept(ctrlfd, NULL, 0);	18,813✔
265
266	if (pollfds[CTRL_CLIENT_FD].revents & POLLIN) {	122,613✔
267	ctrlclntfd = ctrlchannel_process_fd(ctrlclntfd,	40,753✔
268	&g_mainloop_terminate,
269	&g_locality, &tpm_running,
270	mlp);
271	if (ctrlclntfd < 0 &&	40,753✔
272	mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP)	18,543✔
273	g_mainloop_terminate = true;	4✔
274
275	if (g_mainloop_terminate)	40,753✔
276	break;
277	}
278
279	if (pollfds[CTRL_CLIENT_FD].revents & POLLHUP) {	122,196✔
280	if (ctrlclntfd >= 0)	508✔
281	close(ctrlclntfd);	×
282	ctrlclntfd = -1;	508✔
283	/* unixio gets this signal, not tcp */
284	if (mlp->flags & MAIN_LOOP_FLAG_CTRL_END_ON_HUP) {	508✔
285	g_mainloop_terminate = true;	×
286	break;	×
287	}
288	}
289
290	if (!(pollfds[DATA_CLIENT_FD].revents & POLLIN))	122,196✔
291	continue;	79,719✔
292
293	/* before processing a command ensure that the storage is locked */
294	if ((g_mainloop_terminate = !mainloop_ensure_locked_storage(mlp)))	42,477✔
295	break;
296
297	/* Read the command. The number of bytes is determined by 'paramSize' in the stream */
298	if (rc == 0) {	42,477✔
299	rc = SWTPM_IO_Read(&connection_fd, command, &command_length,	42,477✔
300	max_command_length, &mlp->ps);
301	if (rc != 0) {	42,477✔
302	/* connection broke */
303	SWTPM_IO_Disconnect(&connection_fd);	20,263✔
304	}
305	}
306
307	cmd_offset = 0;	42,477✔
308	/* Handle optional TCG Header in front of TPM 2 Command */
309	if (rc == 0 && mlp->tpmversion == TPMLIB_TPM_VERSION_2) {	42,477✔
310	cmd_offset = tpmlib_handle_tcg_tpm2_cmd_header(command,	10,102✔
311	command_length,
312	&g_locality);
313	if (cmd_offset > 0) {	10,102✔
314	/* send header and trailer */
315	iov[0].iov_len = sizeof(respprefix);	6,477✔
316	iov[2].iov_len = sizeof(ack);	6,477✔
317	} else {
318	iov[0].iov_len = 0;	3,625✔
319	iov[2].iov_len = 0;	3,625✔
320	}
321	}
322
323	if (rc == 0) {	42,477✔
324	if (!tpm_running) {	22,214✔
325	tpmlib_write_fatal_error_response(&rbuffer, &rlength,	14✔
326	&rTotal,
327	mlp->tpmversion);
328	goto skip_process;	14✔
329	}
330	}
331
332	if (rc == 0) {	42,463✔
333	lastCommand =	22,200✔
334	tpmlib_get_cmd_ordinal(&command[cmd_offset],	44,400✔
335	command_length - cmd_offset);	22,200✔
336	if (lastCommand != TPM_ORDINAL_NONE)	22,200✔
337	mlp->lastCommand = lastCommand;	22,200✔
338	}
339
340	if (rc == 0) {	42,463✔
341	rlength = 0; /* clear the response buffer */	22,200✔
342	rc = tpmlib_process(&rbuffer,	22,200✔
343	&rlength,
344	&rTotal,
345	&command[cmd_offset],
346	command_length - cmd_offset,
347	mlp->locality_flags,
348	&g_locality,
349	mlp->tpmversion);
350	if (rlength)	22,200✔
351	goto skip_process;	×
352	}
353
354	if (rc == 0) {	42,463✔
355	rlength = 0; /* clear the response buffer */	22,200✔
356	rc = TPMLIB_Process(&rbuffer,	22,200✔
357	&rlength,
358	&rTotal,
359	&command[cmd_offset],
360	command_length - cmd_offset);
361	}
362
363	skip_process:	20,263✔
364	/* write the results */
365	if (rc == 0) {	42,477✔
366	respprefix.size = htobe32(rlength);	22,214✔
367	iov[1].iov_base = rbuffer;	22,214✔
368	iov[1].iov_len = rlength;	22,214✔
369
370	SWTPM_IO_Write(&connection_fd, iov, ARRAY_LEN(iov),	22,214✔
371	&mlp->ps);
372	}
373
374	if (!(mlp->flags & MAIN_LOOP_FLAG_KEEP_CONNECTION)) {	42,477✔
375	SWTPM_IO_Disconnect(&connection_fd);	551✔
376	break;	551✔
377	}
378	}
379
380	rc = 0; /* A fatal TPM_Process() error should cause the TPM to enter shutdown. IO errors	21,057✔
381	are outside the TPM, so the TPM does not shut down. The main loop should
382	continue to function.*/
383	if (connection_fd.fd < 0 && mlp->flags & MAIN_LOOP_FLAG_TERMINATE)	21,057✔
384	break;
385	}
386
387	if (tpm_running && !mlp->disable_auto_shutdown)	423✔
388	tpmlib_maybe_send_tpm2_shutdown(mlp->tpmversion, &mlp->lastCommand,	5✔
389	&mlp->ps);
390
391	free(rbuffer);	423✔
392	free(command);	423✔
393
394	if (ctrlclntfd >= 0)	423✔
395	close(ctrlclntfd);	415✔
396	ctrlchannel_set_client_fd(mlp->cc, -1);	423✔
397
398	if (connection_fd.fd >= 0 && !(mlp->flags & MAIN_LOOP_FLAG_USE_FD))	423✔
UNCOV 399	close(connection_fd.fd);	×
400
401	if (mlp->fd >= 0) {	423✔
402	close(mlp->fd);	391✔
403	mlp->fd = -1;	391✔
404	}
405
406	return rc;	423✔
407	}

stefanberger / swtpm / #2885

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