High level conclusions

Fuzzers reach 54.81% code coverage.

Fuzzers reach 85.04% of cyclomatic complexity.

Fuzzers reach 70.62% of all functions.

Fuzzer ws_frame_fuzzer is blocked:

The runtime code coverage of ws_frame_fuzzer covers 10.59% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer block_check_fuzzer is blocked:

The runtime code coverage of block_check_fuzzer covers 22.96% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer async_fuzzer is blocked:

The runtime code coverage of async_fuzzer covers 23.86% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer proxy_fuzzer is blocked:

The runtime code coverage of proxy_fuzzer covers 22.51% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer persist_fuzzer is blocked:

The runtime code coverage of persist_fuzzer covers 23.31% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer network_message_fuzzer is blocked:

The runtime code coverage of network_message_fuzzer covers 26.98% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer block_fuzzer is blocked:

The runtime code coverage of block_fuzzer covers 26.35% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer oscore_decrypt_fuzzer is blocked:

The runtime code coverage of oscore_decrypt_fuzzer covers 23.39% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer cache_key_fuzzer is blocked:

The runtime code coverage of cache_key_fuzzer covers 14.41% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer observe_fuzzer is blocked:

The runtime code coverage of observe_fuzzer covers 23.94% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer dtls_define_fuzzer is blocked:

The runtime code coverage of dtls_define_fuzzer covers 23.80% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Reachability and coverage overview

Functions statically reachable by fuzzers

719 / 1018

Cyclomatic complexity statically reachable by fuzzers

8216 / 9661

Runtime code coverage of functions

558 / 1018

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Runtime reached by Fuzzers	Combined reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

Fuzzer: dtls_define_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	15	25.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	45	75.0%
All colors	60	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
15	10	coap_dtls_define_issue	call site: 00010	print_timestamp

Runtime coverage analysis

Covered functions

5

Functions that are reachable but not covered

16

Reachable functions

21

Percentage of reachable functions covered

23.81%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/dtls_define_target.c	1
src/coap_debug.c	5
src/coap_dtls.c	3
src/coap_time.c	3

Fuzzer: get_asn1_tag_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	17	53.1%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	15	46.8%
All colors	32	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
17	9	coap_new_string	call site: 00009	coap_log_impl

Runtime coverage analysis

Covered functions

10

Functions that are reachable but not covered

15

Reachable functions

25

Percentage of reachable functions covered

40.0%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/get_asn1_tag_target.c	1
src/coap_asn1.c	4
src/coap_str.c	3
src/coap_mem.c	2
src/coap_debug.c	4
src/coap_time.c	3

Fuzzer: split_uri_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	22	33.3%
gold	[1:9]	13	19.6%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	4	6.06%
lawngreen	50+	27	40.9%
All colors	66	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
4	28	coap_dtls_is_supported	call site: 00028	coap_log_impl
4	40	coap_tls_is_supported	call site: 00040	coap_log_impl
4	50	coap_wss_is_supported	call site: 00050	coap_log_impl
2	25	coap_dtls_is_supported	call site: 00025	coap_log_impl
2	33	coap_split_uri_sub	call site: 00033	coap_log_impl
2	37	coap_tls_is_supported	call site: 00037	coap_log_impl
2	46	coap_ws_is_supported	call site: 00046	coap_log_impl
1	6	coap_split_uri_sub	call site: 00006	vsnprintf
1	17	coap_log_impl	call site: 00017	snprintf

Runtime coverage analysis

Covered functions

15

Functions that are reachable but not covered

13

Reachable functions

28

Percentage of reachable functions covered

53.57%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/split_uri_target.c	1
src/coap_uri.c	2
src/coap_debug.c	4
src/coap_time.c	3
src/coap_openssl.c	2
src/coap_strm_posix.c	1
src/coap_ws.c	2

Fuzzer: oscore_cbor_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	5	10.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	45	90.0%
All colors	50	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
2	16	coap_cleanup	call site: 00016	ENGINE_finish
1	11	coap_dtls_startup	call site: 00011	OPENSSL_init_crypto
1	14	LLVMFuzzerTestOneInput	call site: 00014	coap_cleanup
1	20	coap_cleanup	call site: 00020	coap_free_type

Runtime coverage analysis

Covered functions

30

Functions that are reachable but not covered

4

Reachable functions

33

Percentage of reachable functions covered

87.88%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/oscore_cbor_target.c	1
src/coap_net.c	2
src/coap_time.c	3
src/coap_prng.c	2
src/coap_mem.c	3
src/coap_openssl.c	3
src/coap_debug.c	2
src/coap_uri.c	1
src/oscore/oscore_cbor.c	12

Fuzzer: oscore_conf_parse_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	30	17.2%
gold	[1:9]	20	11.4%
yellow	[10:29]	10	5.74%
greenyellow	[30:49]	4	2.29%
lawngreen	50+	110	63.2%
All colors	174	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
16	41	coap_new_string	call site: 00041	coap_log_impl
4	94	coap_delete_bin_const	call site: 00094	coap_log_impl
4	126	coap_parse_oscore_rcp_conf_mem	call site: 00126	coap_log_impl
2	16	coap_cleanup	call site: 00016	ENGINE_finish
1	11	coap_dtls_startup	call site: 00011	OPENSSL_init_crypto
1	14	LLVMFuzzerTestOneInput	call site: 00014	coap_cleanup
1	20	coap_cleanup	call site: 00020	coap_free_type
1	148	coap_parse_oscore_conf_mem	call site: 00148	__assert_fail

Runtime coverage analysis

Covered functions

40

Functions that are reachable but not covered

22

Reachable functions

61

Percentage of reachable functions covered

63.93%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/oscore_conf_parse_target.c	1
src/coap_net.c	2
src/coap_time.c	4
src/coap_prng.c	2
src/coap_mem.c	3
src/coap_openssl.c	3
src/coap_debug.c	6
src/coap_uri.c	1
src/coap_oscore.c	10
src/coap_str.c	6
src/oscore/oscore_cose.c	4
src/oscore/oscore.c	1

Fuzzer: pdu_parse_udp_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	242	54.2%
gold	[1:9]	19	4.26%
yellow	[10:29]	14	3.13%
greenyellow	[30:49]	2	0.44%
lawngreen	50+	169	37.8%
All colors	446	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
157	247	coap_show_pdu	call site: 00247	coap_option_next
19	408	coap_pdu_encode_header	call site: 00408	coap_log_impl
17	31	coap_pdu_parse2	call site: 00031	coap_log_impl
4	56	coap_pdu_parse_header	call site: 00056	coap_log_impl
4	103	coap_pdu_parse_opt	call site: 00103	coap_log_impl
4	108	coap_pdu_parse_opt	call site: 00108	coap_log_impl
4	194	coap_dtls_is_supported	call site: 00194	coap_log_impl
4	206	coap_tls_is_supported	call site: 00206	coap_log_impl
4	216	coap_wss_is_supported	call site: 00216	coap_log_impl
3	175	coap_get_uri_path	call site: 00175	coap_new_string
2	50	coap_realloc_type	call site: 00050	coap_log_impl
2	156	coap_new_string	call site: 00156	coap_log_impl

Runtime coverage analysis

Covered functions

68

Functions that are reachable but not covered

31

Reachable functions

98

Percentage of reachable functions covered

68.37%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/pdu_parse_udp_target.c	1
src/coap_net.c	2
src/coap_time.c	4
src/coap_prng.c	2
src/coap_mem.c	4
src/coap_openssl.c	5
src/coap_pdu.c	18
src/coap_debug.c	13
src/coap_option.c	12
src/coap_encode.c	3
src/coap_uri.c	9
src/coap_str.c	3
src/coap_strm_posix.c	1
src/coap_ws.c	2
src/coap_block.c	1

Fuzzer: observe_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4416	87.2%
gold	[1:9]	52	1.02%
yellow	[10:29]	278	5.49%
greenyellow	[30:49]	10	0.19%
lawngreen	50+	304	6.00%
All colors	5060	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
499	2166	coap_make_str_const	call site: 02166	coap_session_release_lkd
355	3892	coap_dispatch	call site: 03892	coap_oscore_decrypt_pdu
355	4302	coap_dispatch	call site: 04302	handle_response
271	1343	coap_send_internal	call site: 01343	coap_send_pdu
262	3519	coap_session_free	call site: 03519	coap_dtls_handle_timeout
245	4665	coap_handle_dgram	call site: 04665	coap_handle_event_lkd
223	1804	coap_find_lg_xmit_response	call site: 01804	coap_handle_event_lkd
185	3116	handle_request	call site: 03116	coap_handle_request_put_block
177	1053	coap_socket_connect_udp	call site: 01053	coap_session_reestablished
158	729	coap_show_pdu	call site: 00729	coap_send_test_extended_token
79	3430	handle_request	call site: 03430	coap_resource_release_lkd
71	2700	coap_pdu_release_lkd	call site: 02700	coap_session_max_pdu_size_lkd

Runtime coverage analysis

Covered functions

200

Functions that are reachable but not covered

613

Reachable functions

806

Percentage of reachable functions covered

23.95%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/observe_target.c	3
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	19
src/coap_io.c	10
src/coap_session.c	54
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	25
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3
src/coap_event.c	1
tests/oss-fuzz/coap_fuzz_helper.c	2

Fuzzer: cache_key_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4685	93.3%
gold	[1:9]	39	0.77%
yellow	[10:29]	32	0.63%
greenyellow	[30:49]	215	4.28%
lawngreen	50+	46	0.91%
All colors	5017	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1010	3828	coap_pdu_parse_opt	call site: 03828	coap_handle_event_lkd
722	1044	coap_socket_connect_udp	call site: 01044	coap_session_reestablished
539	2117	coap_session_check_connect	call site: 02117	coap_session_release_lkd
473	3027	coap_delete_str_const	call site: 03027	coap_delete_observer_internal
271	3510	coap_session_free	call site: 03510	coap_dtls_handle_timeout
261	617	coap_check_dots	call site: 00617	coap_add_data_large_request_lkd
241	1777	coap_digest_free	call site: 01777	coap_handle_event_lkd
241	2669	coap_cache_derive_key_w_ignore	call site: 02669	coap_cancel_observe_lkd
113	2913	coap_session_connected	call site: 02913	coap_handle_event_lkd
87	429	coap_option_next	call site: 00429	coap_split_proxy_uri
84	879	coap_session_max_pdu_size_lkd	call site: 00879	coap_send_internal
70	99	coap_dtls_new_context	call site: 00099	coap_session_str

Runtime coverage analysis

Covered functions

118

Functions that are reachable but not covered

683

Reachable functions

798

Percentage of reachable functions covered

14.41%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/cache_key_target.c	1
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	16
src/coap_io.c	10
src/coap_session.c	54
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	11
src/coap_block.c	54
src/coap_resource.c	20
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3

Fuzzer: oscore_decrypt_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4609	89.9%
gold	[1:9]	140	2.73%
yellow	[10:29]	294	5.73%
greenyellow	[30:49]	21	0.40%
lawngreen	50+	61	1.19%
All colors	5125	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
705	4316	coap_oscore_decrypt_pdu	call site: 04316	coap_delete_node_lkd
656	2374	oscore_context_release_recipients	call site: 02374	coap_session_release_lkd
473	3147	coap_delete_str_const	call site: 03147	coap_delete_observer_internal
381	3630	coap_session_free	call site: 03630	coap_dtls_handle_timeout
307	1842	coap_send_internal	call site: 01842	coap_io_process_lkd
213	853	coap_show_pdu	call site: 00853	coap_send_test_extended_token
177	1175	coap_socket_connect_udp	call site: 01175	coap_session_reestablished
113	3033	coap_session_connected	call site: 03033	coap_handle_event_lkd
95	4219	coap_oscore_decrypt_pdu	call site: 04219	coap_handle_event_lkd
82	569	coap_option_filter_get	call site: 00569	coap_split_proxy_uri
73	1391	coap_add_data_after	call site: 01391	coap_rebuild_pdu_for_proxy
70	85	coap_delete_bin_const	call site: 00085	coap_parse_oscore_rcp_conf_mem

Runtime coverage analysis

Covered functions

196

Functions that are reachable but not covered

619

Reachable functions

808

Percentage of reachable functions covered

23.39%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/oscore_decrypt_target.c	1
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	19
src/coap_oscore.c	28
src/coap_str.c	10
src/coap_io.c	10
src/coap_session.c	54
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	20
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3

Fuzzer: block_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4299	84.6%
gold	[1:9]	166	3.26%
yellow	[10:29]	35	0.68%
greenyellow	[30:49]	98	1.92%
lawngreen	50+	482	9.48%
All colors	5080	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
499	2166	coap_make_str_const	call site: 02166	coap_session_release_lkd
354	4302	coap_dispatch	call site: 04302	handle_response
324	3892	coap_dispatch	call site: 03892	coap_oscore_decrypt_pdu
271	1343	coap_send_internal	call site: 01343	coap_send_pdu
262	3519	coap_session_free	call site: 03519	coap_dtls_handle_timeout
245	4665	coap_handle_dgram	call site: 04665	coap_handle_event_lkd
177	1053	coap_socket_connect_udp	call site: 01053	coap_session_reestablished
158	729	coap_show_pdu	call site: 00729	coap_send_test_extended_token
134	1893	coap_add_data_large_internal	call site: 01893	coap_send_q_block1
119	3241	coap_handle_request_send_block	call site: 03241	coap_send_internal
79	3430	handle_request	call site: 03430	coap_resource_release_lkd
71	2700	coap_pdu_release_lkd	call site: 02700	coap_session_max_pdu_size_lkd

Runtime coverage analysis

Covered functions

226

Functions that are reachable but not covered

598

Reachable functions

812

Percentage of reachable functions covered

26.35%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/block_target.c	3
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	19
src/coap_io.c	10
src/coap_session.c	55
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	59
src/coap_resource.c	25
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3
src/coap_event.c	1
tests/oss-fuzz/coap_fuzz_helper.c	2

Fuzzer: network_message_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4292	84.6%
gold	[1:9]	52	1.02%
yellow	[10:29]	72	1.41%
greenyellow	[30:49]	19	0.37%
lawngreen	50+	638	12.5%
All colors	5073	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
344	2356	setup_pki_ssl	call site: 02356	coap_session_release_lkd
324	3893	coap_dispatch	call site: 03893	coap_oscore_decrypt_pdu
307	1721	coap_send_internal	call site: 01721	coap_io_process_lkd
294	3095	handle_request	call site: 03095	coap_session_max_pdu_size_lkd
272	4304	coap_dispatch	call site: 04304	coap_send_ack_lkd
262	3520	coap_session_free	call site: 03520	coap_dtls_handle_timeout
235	1348	coap_send_internal	call site: 01348	coap_send_pdu
224	2127	coap_session_check_connect	call site: 02127	coap_session_release_lkd
176	1055	coap_socket_connect_udp	call site: 01055	coap_session_reestablished
158	731	coap_show_pdu	call site: 00731	coap_send_test_extended_token
147	4764	coap_epoll_ctl_mod	call site: 04764	coap_accept_endpoint
113	2923	coap_session_connected	call site: 02923	coap_handle_event_lkd

Runtime coverage analysis

Covered functions

235

Functions that are reachable but not covered

598

Reachable functions

819

Percentage of reachable functions covered

26.98%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/network_message_target.c	7
src/coap_net.c	78
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	66
src/coap_debug.c	19
src/coap_address.c	16
src/coap_io.c	10
src/coap_session.c	54
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	20
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3

Fuzzer: pdu_parse_ws_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	243	54.4%
gold	[1:9]	15	3.36%
yellow	[10:29]	18	4.03%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	170	38.1%
All colors	446	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
157	247	coap_show_pdu	call site: 00247	coap_option_next
17	31	coap_pdu_parse2	call site: 00031	coap_log_impl
13	414	coap_pdu_encode_header	call site: 00414	coap_log_impl
5	405	LLVMFuzzerTestOneInput	call site: 00405	coap_log_impl
4	53	coap_pdu_parse2	call site: 00053	coap_log_impl
4	103	coap_pdu_parse_opt	call site: 00103	coap_log_impl
4	108	coap_pdu_parse_opt	call site: 00108	coap_log_impl
4	194	coap_dtls_is_supported	call site: 00194	coap_log_impl
4	206	coap_tls_is_supported	call site: 00206	coap_log_impl
4	216	coap_wss_is_supported	call site: 00216	coap_log_impl
3	175	coap_get_uri_path	call site: 00175	coap_new_string
2	50	coap_realloc_type	call site: 00050	coap_log_impl

Runtime coverage analysis

Covered functions

68

Functions that are reachable but not covered

31

Reachable functions

98

Percentage of reachable functions covered

68.37%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/pdu_parse_ws_target.c	1
src/coap_net.c	2
src/coap_time.c	4
src/coap_prng.c	2
src/coap_mem.c	4
src/coap_openssl.c	5
src/coap_pdu.c	18
src/coap_debug.c	13
src/coap_option.c	12
src/coap_encode.c	3
src/coap_uri.c	9
src/coap_str.c	3
src/coap_strm_posix.c	1
src/coap_ws.c	2
src/coap_block.c	1

Fuzzer: uri_extended_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	83	38.0%
gold	[1:9]	4	1.83%
yellow	[10:29]	1	0.45%
greenyellow	[30:49]	6	2.75%
lawngreen	50+	124	56.8%
All colors	218	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
15	186	coap_uri_into_optlist_abbrev	call site: 00186	coap_new_optlist
14	20	coap_split_uri_sub	call site: 00020	print_timestamp
12	91	coap_opt_parse	call site: 00091	coap_log_impl
6	136	LLVMFuzzerTestOneInput	call site: 00136	coap_path_into_optlist_abbrev
5	147	coap_new_optlist	call site: 00147	coap_insert_optlist
4	41	coap_dtls_is_supported	call site: 00041	coap_log_impl
4	53	coap_tls_is_supported	call site: 00053	coap_log_impl
4	63	coap_wss_is_supported	call site: 00063	coap_log_impl
4	120	coap_opt_setheader	call site: 00120	coap_log_impl
2	38	coap_dtls_is_supported	call site: 00038	coap_log_impl
2	46	coap_split_uri_sub	call site: 00046	coap_log_impl
2	50	coap_tls_is_supported	call site: 00050	coap_log_impl

Runtime coverage analysis

Covered functions

58

Functions that are reachable but not covered

25

Reachable functions

82

Percentage of reachable functions covered

69.51%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/uri_extended_target.c	1
src/coap_net.c	2
src/coap_time.c	4
src/coap_prng.c	2
src/coap_mem.c	3
src/coap_openssl.c	5
src/coap_debug.c	7
src/coap_uri.c	26
src/coap_strm_posix.c	1
src/coap_ws.c	2
src/coap_option.c	7
src/coap_encode.c	1
src/coap_pdu.c	1
./include/coap3/coap_uri.h	1

Fuzzer: persist_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4596	88.2%
gold	[1:9]	6	0.11%
yellow	[10:29]	2	0.03%
greenyellow	[30:49]	4	0.07%
lawngreen	50+	599	11.5%
All colors	5207	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1008	3850	coap_pdu_parse_opt	call site: 03850	coap_handle_event_lkd
499	2177	coap_make_str_const	call site: 02177	coap_session_release_lkd
271	1354	coap_send_internal	call site: 01354	coap_send_pdu
271	3530	coap_session_free	call site: 03530	coap_dtls_handle_timeout
223	1815	coap_find_lg_xmit_response	call site: 01815	coap_handle_event_lkd
219	3099	coap_get_resource_from_uri_path_lkd	call site: 03099	coap_session_max_pdu_size_lkd
177	1064	coap_socket_connect_udp	call site: 01064	coap_session_reestablished
160	2711	coap_pdu_release_lkd	call site: 02711	coap_session_max_pdu_size_lkd
160	3360	coap_touch_observer	call site: 03360	coap_delete_observer_request
158	740	coap_show_pdu	call site: 00740	coap_send_test_extended_token
111	1242	coap_add_option	call site: 01242	coap_send_internal
79	1630	coap_send_internal	call site: 01630	coap_session_disconnected_lkd

Runtime coverage analysis

Covered functions

204

Functions that are reachable but not covered

638

Reachable functions

832

Percentage of reachable functions covered

23.32%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/persist_target.c	5
src/coap_subscribe.c	15
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	18
src/coap_io.c	10
src/coap_session.c	54
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	29
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	13
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4

Fuzzer: proxy_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4535	89.8%
gold	[1:9]	106	2.09%
yellow	[10:29]	251	4.97%
greenyellow	[30:49]	92	1.82%
lawngreen	50+	66	1.30%
All colors	5050	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1391	3520	coap_session_free	call site: 03520	coap_dtls_handle_timeout
466	3044	coap_free_resource	call site: 03044	coap_check_async
387	2270	coap_proxy_get_ongoing_session	call site: 02270	coap_new_client_session_oscore_pki3_lkd
266	1733	coap_send_lkd	call site: 01733	coap_cancel_observe_lkd
239	1344	coap_send_internal	call site: 01344	coap_send_pdu
160	2760	coap_proxy_forward_request_lkd	call site: 02760	coap_proxy_call_response_handler
158	730	coap_show_pdu	call site: 00730	coap_send_test_extended_token
142	2127	coap_session_check_connect	call site: 02127	coap_session_release_lkd
70	109	coap_dtls_new_context	call site: 00109	coap_session_str
69	260	coap_dtls_free_context	call site: 00260	coap_new_endpoint_lkd
66	2923	coap_session_connected	call site: 02923	coap_handle_event_lkd
53	1646	coap_delete_node_lkd	call site: 01646	coap_delete_observers

Runtime coverage analysis

Covered functions

188

Functions that are reachable but not covered

623

Reachable functions

804

Percentage of reachable functions covered

22.51%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/proxy_target.c	4
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	19
src/coap_io.c	10
src/coap_session.c	54
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	23
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	23
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3
src/coap_event.c	1

Fuzzer: pdu_parse_tcp_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	240	53.8%
gold	[1:9]	14	3.13%
yellow	[10:29]	17	3.81%
greenyellow	[30:49]	2	0.44%
lawngreen	50+	173	38.7%
All colors	446	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
157	247	coap_show_pdu	call site: 00247	coap_option_next
17	31	coap_pdu_parse2	call site: 00031	coap_log_impl
5	405	LLVMFuzzerTestOneInput	call site: 00405	coap_log_impl
4	103	coap_pdu_parse_opt	call site: 00103	coap_log_impl
4	108	coap_pdu_parse_opt	call site: 00108	coap_log_impl
4	194	coap_dtls_is_supported	call site: 00194	coap_log_impl
4	206	coap_tls_is_supported	call site: 00206	coap_log_impl
4	216	coap_wss_is_supported	call site: 00216	coap_log_impl
4	423	coap_pdu_encode_header	call site: 00423	coap_log_impl
3	53	coap_pdu_parse2	call site: 00053	coap_log_impl
3	57	coap_pdu_parse_header	call site: 00057	coap_log_impl
3	175	coap_get_uri_path	call site: 00175	coap_new_string

Runtime coverage analysis

Covered functions

68

Functions that are reachable but not covered

31

Reachable functions

98

Percentage of reachable functions covered

68.37%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/pdu_parse_tcp_target.c	1
src/coap_net.c	2
src/coap_time.c	4
src/coap_prng.c	2
src/coap_mem.c	4
src/coap_openssl.c	5
src/coap_pdu.c	18
src/coap_debug.c	13
src/coap_option.c	12
src/coap_encode.c	3
src/coap_uri.c	9
src/coap_str.c	3
src/coap_strm_posix.c	1
src/coap_ws.c	2
src/coap_block.c	1

Fuzzer: async_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4504	88.1%
gold	[1:9]	67	1.31%
yellow	[10:29]	113	2.21%
greenyellow	[30:49]	297	5.81%
lawngreen	50+	130	2.54%
All colors	5111	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
533	2166	coap_make_str_const	call site: 02166	coap_session_release_lkd
355	3892	coap_dispatch	call site: 03892	coap_oscore_decrypt_pdu
272	4303	coap_dispatch	call site: 04303	coap_send_ack_lkd
271	1343	coap_send_internal	call site: 01343	coap_send_pdu
262	3519	coap_session_free	call site: 03519	coap_dtls_handle_timeout
248	3115	handle_request	call site: 03115	coap_handle_request_put_block
245	4665	coap_handle_dgram	call site: 04665	coap_handle_event_lkd
223	1804	coap_find_lg_xmit_response	call site: 01804	coap_handle_event_lkd
177	1053	coap_socket_connect_udp	call site: 01053	coap_session_reestablished
158	729	coap_show_pdu	call site: 00729	coap_send_test_extended_token
81	1720	coap_send_internal	call site: 01720	coap_io_process_lkd
72	3437	coap_free_async_sub	call site: 03437	coap_retransmit

Runtime coverage analysis

Covered functions

202

Functions that are reachable but not covered

622

Reachable functions

817

Percentage of reachable functions covered

23.87%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/async_target.c	3
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	19
src/coap_io.c	10
src/coap_session.c	55
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	24
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	15
src/coap_subscribe.c	3
src/coap_event.c	1
tests/oss-fuzz/coap_fuzz_helper.c	2

Fuzzer: block_check_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4576	89.3%
gold	[1:9]	10	0.19%
yellow	[10:29]	380	7.41%
greenyellow	[30:49]	47	0.91%
lawngreen	50+	111	2.16%
All colors	5124	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1252	3644	coap_io_do_epoll_lkd	call site: 03644	coap_read_endpoint
709	2167	coap_make_str_const	call site: 02167	coap_session_release_lkd
396	1270	coap_add_data_after	call site: 01270	coap_send_pdu
201	3089	coap_get_resource_from_uri_path_lkd	call site: 03089	coap_session_max_pdu_size_lkd
177	1054	coap_socket_connect_udp	call site: 01054	coap_session_reestablished
158	730	coap_show_pdu	call site: 00730	coap_send_test_extended_token
147	3291	coap_add_block_b_data	call site: 03291	coap_send_internal
94	1934	coap_add_block	call site: 01934	coap_send_internal
88	1674	coap_block_delete_lg_xmit	call site: 01674	coap_cancel_session_messages
70	109	coap_dtls_new_context	call site: 00109	coap_session_str
66	458	coap_new_string	call site: 00458	coap_split_proxy_uri
66	2923	coap_session_connected	call site: 02923	coap_handle_event_lkd

Runtime coverage analysis

Covered functions

189

Functions that are reachable but not covered

624

Reachable functions

810

Percentage of reachable functions covered

22.96%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/block_check_target.c	2
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	65
src/coap_debug.c	19
src/coap_io.c	10
src/coap_session.c	55
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	2
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	5
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	35
src/coap_cache.c	5
src/coap_block.c	61
src/coap_resource.c	23
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3
src/coap_event.c	1

Fuzzer: ws_frame_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4897	94.8%
gold	[1:9]	49	0.94%
yellow	[10:29]	206	3.98%
greenyellow	[30:49]	3	0.05%
lawngreen	50+	9	0.17%
All colors	5164	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1391	3510	coap_session_free	call site: 03510	coap_dtls_handle_timeout
793	2117	coap_session_check_connect	call site: 02117	coap_session_release_lkd
583	1044	coap_socket_connect_udp	call site: 01044	coap_session_reestablished
473	3027	coap_delete_str_const	call site: 03027	coap_delete_observer_internal
424	539	coap_session_free	call site: 00539	coap_delete_proxy_subscriber
345	1673	coap_session_disconnected_lkd	call site: 01673	coap_delete_node_lkd
135	386	coap_handle_event_lkd	call site: 00386	coap_proxy_remove_association
113	2913	coap_session_connected	call site: 02913	coap_handle_event_lkd
70	99	coap_dtls_new_context	call site: 00099	coap_session_str
69	250	coap_dtls_free_context	call site: 00250	coap_new_endpoint_lkd
46	328	coap_socket_dgrm_close	call site: 00328	coap_netif_strm_listen
43	4994	coap_ws_rd_http_header_client	call site: 04994	coap_ws_build_key_hash

Runtime coverage analysis

Covered functions

92

Functions that are reachable but not covered

726

Reachable functions

812

Percentage of reachable functions covered

10.59%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
tests/oss-fuzz/ws_frame_target.c	4
src/coap_net.c	64
src/coap_time.c	5
src/coap_prng.c	2
src/coap_mem.c	5
src/coap_openssl.c	67
src/coap_debug.c	16
src/coap_io.c	10
src/coap_session.c	53
src/coap_address.c	16
src/coap_netif.c	11
src/coap_strm_posix.c	6
src/coap_ws.c	15
src/coap_dgrm_posix.c	5
src/coap_io_posix.c	4
src/coap_proxy.c	22
src/coap_uri.c	20
src/coap_option.c	21
src/coap_encode.c	6
src/coap_str.c	10
src/coap_pdu.c	34
src/coap_cache.c	5
src/coap_block.c	54
src/coap_resource.c	20
src/coap_oscore.c	19
./include/coap3/coap_uri.h	1
src/oscore/oscore_cose.c	19
src/oscore/oscore_context.c	27
src/oscore/oscore.c	8
src/oscore/oscore_cbor.c	11
./include/coap3/coap_block_internal.h	6
src/oscore/oscore_crypto.c	4
/usr/include/openssl/ssl.h	3
src/coap_dtls.c	5
/usr/include/openssl/x509v3.h	3
./include/coap3/coap_pdu_internal.h	1
./include/coap3/coap_resource_internal.h	1
src/coap_async.c	4
src/coap_subscribe.c	3
src/coap_event.c	1

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Func name	Functions filename	Arg count	Args	Function depth	hitcount	instr count	bb count	cyclomatic complexity	Reachable functions	Incoming references	total cyclomatic complexity	Unreached complexity
hnd_get_wellknown_lkd	/src/libcoap/src/coap_net.c	5	['N/A', 'N/A', 'N/A', 'N/A', 'N/A']	116	0	304	50	16	696	0	7254	121
coap_netif_dgrm_write	/src/libcoap/src/coap_netif.c	3	['N/A', 'N/A', 'size_t']	8	0	179	33	10	67	0	336	72
coap_tls_engine_configure	/src/libcoap/src/coap_openssl.c	1	['N/A']	6	0	575	124	34	32	0	121	52
coap_endpoint_join_mcast_group_intf	/src/libcoap/src/coap_net.c	3	['N/A', 'N/A', 'N/A']	6	0	52	9	4	37	0	133	42
coap_op_resource_deleted	/src/libcoap/src/coap_subscribe.c	3	['N/A', 'N/A', 'N/A']	6	0	252	40	16	37	0	129	40
coap_session_set_type_server	/src/libcoap/src/coap_session.c	1	['N/A']	113	0	18	3	2	692	0	7169	36

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

Functions statically reachable by fuzzers

740 / 1018

Cyclomatic complexity statically reachable by fuzzers

8571 / 9661

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Runtime reached by Fuzzers	Combined reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

tests/oss-fuzz/dtls_define_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_dtls_define_issue']

tests/oss-fuzz/get_asn1_tag_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_new_string']

tests/oss-fuzz/split_uri_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_dtls_is_supported', 'coap_tls_is_supported', 'coap_wss_is_supported', 'coap_split_uri_sub', 'coap_ws_is_supported', 'coap_log_impl']

tests/oss-fuzz/oscore_cbor_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_cleanup', 'coap_dtls_startup', 'LLVMFuzzerTestOneInput']

tests/oss-fuzz/oscore_conf_parse_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_new_string', 'coap_delete_bin_const', 'coap_parse_oscore_rcp_conf_mem', 'coap_cleanup', 'coap_dtls_startup', 'LLVMFuzzerTestOneInput', 'coap_parse_oscore_conf_mem']

tests/oss-fuzz/pdu_parse_udp_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_show_pdu', 'coap_pdu_encode_header', 'coap_pdu_parse2', 'coap_pdu_parse_header', 'coap_pdu_parse_opt', 'coap_dtls_is_supported', 'coap_tls_is_supported', 'coap_wss_is_supported', 'coap_get_uri_path']

tests/oss-fuzz/observe_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_make_str_const', 'coap_dispatch', 'coap_send_internal', 'coap_session_free', 'coap_handle_dgram', 'coap_find_lg_xmit_response', 'handle_request', 'coap_socket_connect_udp', 'coap_show_pdu']

tests/oss-fuzz/cache_key_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_pdu_parse_opt', 'coap_socket_connect_udp', 'coap_session_check_connect', 'coap_delete_str_const', 'coap_session_free', 'coap_check_dots', 'coap_digest_free', 'coap_cache_derive_key_w_ignore', 'coap_session_connected', 'coap_option_next']

tests/oss-fuzz/oscore_decrypt_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_oscore_decrypt_pdu', 'oscore_context_release_recipients', 'coap_delete_str_const', 'coap_session_free', 'coap_send_internal', 'coap_show_pdu', 'coap_socket_connect_udp', 'coap_session_connected', 'coap_option_filter_get']

tests/oss-fuzz/block_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_make_str_const', 'coap_dispatch', 'coap_send_internal', 'coap_session_free', 'coap_handle_dgram', 'coap_socket_connect_udp', 'coap_show_pdu', 'coap_add_data_large_internal', 'coap_handle_request_send_block']

tests/oss-fuzz/network_message_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['setup_pki_ssl', 'coap_dispatch', 'coap_send_internal', 'handle_request', 'coap_session_free', 'coap_session_check_connect', 'coap_socket_connect_udp', 'coap_show_pdu']

tests/oss-fuzz/pdu_parse_ws_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_show_pdu', 'coap_pdu_parse2', 'coap_pdu_encode_header', 'LLVMFuzzerTestOneInput', 'coap_pdu_parse_opt', 'coap_dtls_is_supported', 'coap_tls_is_supported', 'coap_wss_is_supported']

tests/oss-fuzz/uri_extended_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_uri_into_optlist_abbrev', 'coap_split_uri_sub', 'coap_opt_parse', 'LLVMFuzzerTestOneInput', 'coap_new_optlist', 'coap_dtls_is_supported', 'coap_tls_is_supported', 'coap_wss_is_supported', 'coap_opt_setheader']

tests/oss-fuzz/persist_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_pdu_parse_opt', 'coap_make_str_const', 'coap_send_internal', 'coap_session_free', 'coap_find_lg_xmit_response', 'coap_get_resource_from_uri_path_lkd', 'coap_socket_connect_udp', 'coap_pdu_release_lkd', 'coap_touch_observer', 'coap_show_pdu']

tests/oss-fuzz/proxy_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_session_free', 'coap_free_resource', 'coap_proxy_get_ongoing_session', 'coap_send_lkd', 'coap_send_internal', 'coap_proxy_forward_request_lkd', 'coap_show_pdu', 'coap_session_check_connect', 'coap_dtls_new_context', 'coap_dtls_free_context']

tests/oss-fuzz/pdu_parse_tcp_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_show_pdu', 'coap_pdu_parse2', 'LLVMFuzzerTestOneInput', 'coap_pdu_parse_opt', 'coap_dtls_is_supported', 'coap_tls_is_supported', 'coap_wss_is_supported', 'coap_pdu_encode_header']

tests/oss-fuzz/async_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_make_str_const', 'coap_dispatch', 'coap_send_internal', 'coap_session_free', 'handle_request', 'coap_handle_dgram', 'coap_find_lg_xmit_response', 'coap_socket_connect_udp', 'coap_show_pdu']

tests/oss-fuzz/block_check_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_io_do_epoll_lkd', 'coap_make_str_const', 'coap_add_data_after', 'coap_get_resource_from_uri_path_lkd', 'coap_socket_connect_udp', 'coap_show_pdu', 'coap_add_block_b_data', 'coap_add_block', 'coap_block_delete_lg_xmit', 'coap_dtls_new_context']

tests/oss-fuzz/ws_frame_target.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['coap_session_free', 'coap_session_check_connect', 'coap_socket_connect_udp', 'coap_delete_str_const', 'coap_session_disconnected_lkd', 'coap_handle_event_lkd', 'coap_session_connected', 'coap_dtls_new_context', 'coap_dtls_free_context']

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name	Function total lines	Lines covered at runtime	percentage covered	Reached by fuzzers
coap_show_pdu	327	20	6.116%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'pdu_parse_udp_fuzzer', 'pdu_parse_tcp_fuzzer', 'block_fuzzer', 'pdu_parse_ws_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_debug_send_packet	42	23	54.76%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'oscore_decrypt_fuzzer']
coap_debug_set_packet_common	41	15	36.58%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_socket_connect_udp	165	74	44.84%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_socket_send	118	39	33.05%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'oscore_decrypt_fuzzer']
coap_test_cid_tuple_change	31	4	12.90%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'oscore_decrypt_fuzzer']
coap_new_context	69	37	53.62%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_send_internal	164	77	46.95%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_cancel_session_messages	32	5	15.62%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_dispatch	399	179	44.86%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_handle_event_lkd	71	25	35.21%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_is_session_proxy	58	10	17.24%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_remove_from_queue_token	45	4	8.888%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_pdu_duplicate_lkd	74	30	40.54%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_remove_option	78	13	16.66%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_add_resource_lkd	38	20	52.63%	['proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'block_check_fuzzer']
coap_add_observer	145	63	43.44%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_delete_observer_internal	40	18	45.0%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_session_connected	58	11	18.96%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_oscore_decrypt_pdu	685	165	24.08%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
oscore_validate_sender_seq	51	18	35.29%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
oscore_cbor_put_unsigned	42	9	21.42%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
oscore_find_context	106	30	28.30%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
oscore_log_context	39	4	10.25%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_handle_request_send_block	268	34	12.68%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_handle_request_put_block	473	169	35.72%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
setup_block_b	35	18	51.42%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_remove_from_queue	38	6	15.78%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_delete_proxy_subscriber	39	5	12.82%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_print_wellknown_lkd	143	78	54.54%	['block_fuzzer']
coap_print_addr	40	15	37.5%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_print_ip_addr	49	15	30.61%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'uri_extended_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_call_response_handler	43	17	39.53%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
prepend_508_ip	90	35	38.88%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
handle_signaling	79	33	41.77%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
handle_response	74	17	22.97%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_dtls_info_callback	66	26	39.39%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_dgram_ctrl	61	31	50.81%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
setup_pki_ssl	291	13	4.467%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_session_delay_pdu	38	17	44.73%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_socket_connect_tcp1	102	36	35.29%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_socket_write	39	20	51.28%	['network_message_fuzzer']
coap_socket_bind_udp	75	29	38.66%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_new_endpoint_lkd	97	34	35.05%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_persist_observe_add_lkd	202	30	14.85%	['persist_fuzzer']
get_coap_addr_info	55	16	29.09%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
update_coap_addr_port	39	8	20.51%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_send_lkd	290	32	11.03%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_proxy_log_entry	32	3	9.375%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_proxy_del_req	34	10	29.41%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_verify_proxy_scheme_supported	45	11	24.44%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_proxy_remove_association	40	14	35.0%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_proxy_forward_request_lkd	243	108	44.44%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_proxy_get_ongoing_session	162	67	41.35%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_resource_proxy_uri_init2	37	16	43.24%	['proxy_fuzzer']
coap_add_data_blocked_response	101	51	50.49%	['block_check_fuzzer']
coap_cancel_observe_lkd	72	13	18.05%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_block_check_lg_xmit_timeouts	41	22	53.65%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_block_check_lg_crcv_timeouts	57	19	33.33%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_block_check_lg_srcv_timeouts	75	19	25.33%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_block_check_q_block1_xmit	54	12	22.22%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_block_check_q_block2_xmit	52	14	26.92%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_io_prepare_io_lkd	336	74	22.02%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_client_delay_first	47	5	10.63%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_io_do_epoll_lkd	69	10	14.49%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_proxy_check_timeouts	44	7	15.90%	['network_message_fuzzer', 'proxy_fuzzer', 'observe_fuzzer', 'async_fuzzer', 'cache_key_fuzzer', 'persist_fuzzer', 'block_fuzzer', 'ws_frame_fuzzer', 'block_check_fuzzer', 'oscore_decrypt_fuzzer']
coap_ws_rd_http_header_client	64	7	10.93%	['ws_frame_fuzzer']

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file	Reached by	Covered by
	[]	[]
/src/libcoap/src/coap_uri.c	['split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/./include/coap3/coap_address.h	[]	[]
/src/libcoap/src/coap_mem.c	['get_asn1_tag_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['get_asn1_tag_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_netif.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_ws.c	['split_uri_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['split_uri_fuzzer', 'pdu_parse_udp_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'pdu_parse_tcp_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/./include/coap3/coap_pdu_internal.h	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	[]
/src/libcoap/src/coap_subscribe.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/tests/oss-fuzz/async_target.c	['async_fuzzer']	['async_fuzzer']
/src/libcoap/src/coap_net.c	['oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_pdu.c	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/usr/include/openssl/x509v3.h	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	[]
/src/libcoap/tests/oss-fuzz/network_message_target.c	['network_message_fuzzer']	['network_message_fuzzer']
/src/libcoap/tests/oss-fuzz/proxy_target.c	['proxy_fuzzer']	['proxy_fuzzer']
/src/libcoap/src/coap_session.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/tests/oss-fuzz/oscore_conf_parse_target.c	['oscore_conf_parse_fuzzer']	['oscore_conf_parse_fuzzer']
/src/libcoap/tests/oss-fuzz/observe_target.c	['observe_fuzzer']	['observe_fuzzer']
/src/libcoap/tests/oss-fuzz/pdu_parse_tcp_target.c	['pdu_parse_tcp_fuzzer']	['pdu_parse_tcp_fuzzer']
/src/libcoap/src/coap_io_posix.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/oscore/oscore_cbor.c	['oscore_cbor_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_cbor_fuzzer', 'oscore_decrypt_fuzzer']
/src/libcoap/tests/oss-fuzz/coap_fuzz_helper.c	['observe_fuzzer', 'block_fuzzer', 'async_fuzzer']	['observe_fuzzer', 'block_fuzzer', 'async_fuzzer']
/src/libcoap/tests/oss-fuzz/persist_target.c	['persist_fuzzer']	['persist_fuzzer']
/src/libcoap/src/oscore/oscore_crypto.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_decrypt_fuzzer']
/src/libcoap/./include/coap3/coap_block_internal.h	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	[]
/src/libcoap/tests/oss-fuzz/block_target.c	['block_fuzzer']	['block_fuzzer']
/src/libcoap/src/coap_dtls.c	['dtls_define_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['dtls_define_fuzzer', 'network_message_fuzzer']
/src/libcoap/tests/oss-fuzz/cache_key_target.c	['cache_key_fuzzer']	['cache_key_fuzzer']
/src/libcoap/src/coap_strm_posix.c	['split_uri_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['split_uri_fuzzer', 'pdu_parse_udp_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'pdu_parse_tcp_fuzzer']
/src/libcoap/src/coap_str.c	['get_asn1_tag_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['get_asn1_tag_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_proxy.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/tests/oss-fuzz/block_check_target.c	['block_check_fuzzer']	['block_check_fuzzer']
/src/libcoap/src/coap_debug.c	['dtls_define_fuzzer', 'get_asn1_tag_fuzzer', 'split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['dtls_define_fuzzer', 'split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_prng.c	['oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_event.c	['observe_fuzzer', 'block_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'block_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_oscore.c	['oscore_conf_parse_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_conf_parse_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/./include/coap3/coap_resource_internal.h	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	[]
/src/libcoap/src/coap_async.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_address.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/tests/oss-fuzz/dtls_define_target.c	['dtls_define_fuzzer']	['dtls_define_fuzzer']
/src/libcoap/src/coap_dgrm_posix.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_openssl.c	['split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_block.c	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'async_fuzzer', 'block_check_fuzzer']
/src/libcoap/tests/oss-fuzz/uri_extended_target.c	['uri_extended_fuzzer']	['uri_extended_fuzzer']
/src/libcoap/src/oscore/oscore.c	['oscore_conf_parse_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_conf_parse_fuzzer', 'oscore_decrypt_fuzzer']
/src/libcoap/./include/coap3/coap_uri.h	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	[]
/src/libcoap/tests/oss-fuzz/get_asn1_tag_target.c	['get_asn1_tag_fuzzer']	['get_asn1_tag_fuzzer']
/src/libcoap/tests/oss-fuzz/pdu_parse_ws_target.c	['pdu_parse_ws_fuzzer']	['pdu_parse_ws_fuzzer']
/src/libcoap/tests/oss-fuzz/oscore_cbor_target.c	['oscore_cbor_fuzzer']	['oscore_cbor_fuzzer']
/src/libcoap/tests/oss-fuzz/oscore_decrypt_target.c	['oscore_decrypt_fuzzer']	['oscore_decrypt_fuzzer']
/src/libcoap/tests/oss-fuzz/split_uri_target.c	['split_uri_fuzzer']	['split_uri_fuzzer']
/src/libcoap/src/oscore/oscore_context.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/coap_time.c	['dtls_define_fuzzer', 'get_asn1_tag_fuzzer', 'split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['split_uri_fuzzer', 'oscore_cbor_fuzzer', 'oscore_conf_parse_fuzzer', 'pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/src/oscore/oscore_cose.c	['oscore_conf_parse_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['oscore_conf_parse_fuzzer', 'oscore_decrypt_fuzzer']
/src/libcoap/src/coap_asn1.c	['get_asn1_tag_fuzzer']	['get_asn1_tag_fuzzer']
/src/libcoap/src/coap_cache.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'block_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'block_check_fuzzer']
/src/libcoap/src/coap_resource.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']
/src/libcoap/tests/oss-fuzz/pdu_parse_udp_target.c	['pdu_parse_udp_fuzzer']	['pdu_parse_udp_fuzzer']
/src/libcoap/tests/oss-fuzz/ws_frame_target.c	['ws_frame_fuzzer']	['ws_frame_fuzzer']
/usr/include/openssl/ssl.h	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	[]
/src/libcoap/src/coap_option.c	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer']
/src/libcoap/src/coap_encode.c	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['pdu_parse_udp_fuzzer', 'observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'pdu_parse_ws_fuzzer', 'uri_extended_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'pdu_parse_tcp_fuzzer', 'async_fuzzer', 'block_check_fuzzer']
/src/libcoap/src/coap_io.c	['observe_fuzzer', 'cache_key_fuzzer', 'oscore_decrypt_fuzzer', 'block_fuzzer', 'network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer', 'ws_frame_fuzzer']	['network_message_fuzzer', 'persist_fuzzer', 'proxy_fuzzer', 'async_fuzzer', 'block_check_fuzzer']

Directories in report

Directory
/src/libcoap/src/
/src/libcoap/src/oscore/
/usr/include/openssl/
/src/libcoap/tests/oss-fuzz/
/src/libcoap/./include/coap3/