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coap_block.c: Correct actual_token in coap_block_new_lg_crcv()

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It could point to a pdu that is freed off, rather than the saved PDU
information.
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Jon Shallow authored and Jon Shallow committed 2025-03-24 10:08:36 +00:00
1 parent d0bfbb7ac8
commit ff50974043
1 file changed
+8
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src/coap_block.c
+8
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@@ -2329,6 +2329,14 @@ coap_block_new_lg_crcv(coap_session_t *session, coap_pdu_t *pdu,
}
lg_crcv->pdu.token += lg_crcv->pdu.max_hdr_size;
memcpy(lg_crcv->pdu.token, pdu->token, token_options);
if (lg_crcv->pdu.actual_token.length < COAP_TOKEN_EXT_1B_BIAS) {
lg_crcv->pdu.actual_token.s = &lg_crcv->pdu.token[0];
} else if (lg_crcv->pdu.actual_token.length < COAP_TOKEN_EXT_2B_BIAS) {
lg_crcv->pdu.actual_token.s = &lg_crcv->pdu.token[1];
} else if (lg_crcv->pdu.actual_token.length <= COAP_TOKEN_EXT_MAX) {
lg_crcv->pdu.actual_token.s = &lg_crcv->pdu.token[2];
}
if (lg_crcv->pdu.data) {
lg_crcv->pdu.data = lg_crcv->pdu.token + token_options;
assert(pdu->data);