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Merge pull request #430 from nfi/contrib/coap-block2-offset

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Added check for block offset overflow in CoAP block2 requests.
This commit is contained in:
Simon Duquennoy 2018-04-13 18:07:08 +02:00 committed by GitHub
commit 71b48c2c98
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1 changed files with 12 additions and 4 deletions
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16
os/net/app-layer/coap/coap-engine.c
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@ -199,10 +199,18 @@ coap_receive(const coap_endpoint_t *src,
new_offset = block_offset;
}
/* call CoAP framework and check if found and allowed */
status = call_service(message, response,
transaction->message + COAP_MAX_HEADER_SIZE,
block_size, &new_offset);
if(new_offset < 0) {
LOG_DBG("Blockwise: block request offset overflow\n");
coap_status_code = BAD_OPTION_4_02;
coap_error_message = "BlockOutOfScope";
status = COAP_HANDLER_STATUS_CONTINUE;
} else {
/* call CoAP framework and check if found and allowed */
status = call_service(message, response,
transaction->message + COAP_MAX_HEADER_SIZE,
block_size, &new_offset);
}
if(status != COAP_HANDLER_STATUS_CONTINUE) {
if(coap_status_code == NO_ERROR) {