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net: lwm2m: Allow CoAP block size to be changed

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Allow changing the CoAP Block-wise transfers block-size
for subsequent GET requests.

It looks like Leshan switches block size back to its
configured value, if it is smaller.
So even when we send block N=0 with size of 512, Leshan
seem to handle that properly but still asks N=2 with
block size 256(if that is configured).

Signed-off-by: Seppo Takalo <seppo.takalo@nordicsemi.no>
This commit is contained in:
Seppo Takalo 2024-04-10 13:44:14 +03:00 • committed by Anas Nashif
commit 51d80a9838
3 changed files with 45 additions and 33 deletions
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13
tests/net/lib/lwm2m/block_transfer/src/main.c
View file

@ -11,7 +11,8 @@
/* Declaration of 'private' function */
int prepare_msg_for_send(struct lwm2m_message *msg);
int build_msg_block_for_send(struct lwm2m_message *msg, uint16_t block_num);
int build_msg_block_for_send(struct lwm2m_message *msg, uint16_t block_num,
enum coap_block_size block_size);
int request_output_block_ctx(struct coap_block_context **ctx);
void release_output_block_ctx(struct coap_block_context ** const ctx);
@ -270,7 +271,7 @@ ZTEST_F(net_block_transfer, test_build_blocks_for_send_exactly_2_blocks)
"Last byte in payload wrong");
/* block 1 */
ret = build_msg_block_for_send(msg, 1);
ret = build_msg_block_for_send(msg, 1, COAP_BLOCK_64);
zassert_equal(ret, 0, "Could not create second block");
ret = coap_get_option_int(&msg->cpkt, COAP_OPTION_BLOCK1);
@ -285,7 +286,7 @@ ZTEST_F(net_block_transfer, test_build_blocks_for_send_exactly_2_blocks)
"Last byte in payload wrong");
/* block 2 doesn't exist */
ret = build_msg_block_for_send(msg, 2);
ret = build_msg_block_for_send(msg, 2, COAP_BLOCK_64);
zassert_equal(ret, -EINVAL, "Could not create second block");
}
@ -346,7 +347,7 @@ ZTEST_F(net_block_transfer, test_build_blocks_for_send_more_than_2_blocks)
"Last byte in payload wrong");
/* block 1 */
ret = build_msg_block_for_send(msg, 1);
ret = build_msg_block_for_send(msg, 1, COAP_BLOCK_64);
zassert_equal(ret, 0, "Could not create second block");
ret = coap_get_option_int(&msg->cpkt, COAP_OPTION_BLOCK1);
@ -361,7 +362,7 @@ ZTEST_F(net_block_transfer, test_build_blocks_for_send_more_than_2_blocks)
"Last byte in payload wrong");
/* block 2 */
ret = build_msg_block_for_send(msg, 2);
ret = build_msg_block_for_send(msg, 2, COAP_BLOCK_64);
zassert_equal(ret, 0, "Could not create second block");
ret = coap_get_option_int(&msg->cpkt, COAP_OPTION_BLOCK1);
@ -374,7 +375,7 @@ ZTEST_F(net_block_transfer, test_build_blocks_for_send_more_than_2_blocks)
zassert_equal(0x80, payload[0], "First (and only) byte in payload wrong");
/* block 3 doesn't exist */
ret = build_msg_block_for_send(msg, 3);
ret = build_msg_block_for_send(msg, 3, COAP_BLOCK_64);
zassert_equal(ret, -EINVAL, "Could not create second block");
}